U.S. patent application number 17/236485 was filed with the patent office on 2021-10-07 for port adaptation method and apparatus.
The applicant listed for this patent is Huawei Technologies Co., Ltd.. Invention is credited to Shiyong Fu, Rui Hua, Yan Zhuang.
Application Number | 20210314180 17/236485 |
Document ID | / |
Family ID | 1000005669628 |
Filed Date | 2021-10-07 |
United States Patent
Application |
20210314180 |
Kind Code |
A1 |
Fu; Shiyong ; et
al. |
October 7, 2021 |
Port Adaptation Method and Apparatus
Abstract
A network device probes whether a first port of the network
device is coupled to power sourcing equipment, and when probing
that the first port is coupled to power sourcing equipment,
maintain or change the first port to a powered state, and lock the
first port as a power drawing port, or when probing that the first
port is decoupled to power sourcing equipment, and the network
device has a power supply for supplying power, change the first
port to a powering state. In this way, the first port may
adaptively serve as a power drawing port or a power sourcing port
according to a coupled device such that manually distinguished a
port during device interconnection is not necessary and a coupling
error rate is reduced.
Inventors: |
Fu; Shiyong; (Shenzhen,
CN) ; Zhuang; Yan; (Nanjing, CN) ; Hua;
Rui; (Nanjing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Huawei Technologies Co., Ltd. |
Shenzhen |
|
CN |
|
|
Family ID: |
1000005669628 |
Appl. No.: |
17/236485 |
Filed: |
April 21, 2021 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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16114896 |
Aug 28, 2018 |
11005671 |
|
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17236485 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F 1/266 20130101;
H04L 43/12 20130101; H02J 13/00016 20200101; G06F 1/263 20130101;
H04L 12/40045 20130101; H02J 13/0062 20130101; H04L 12/10
20130101 |
International
Class: |
H04L 12/10 20060101
H04L012/10; H04L 12/26 20060101 H04L012/26; H04L 12/40 20060101
H04L012/40; G06F 1/26 20060101 G06F001/26; H02J 13/00 20060101
H02J013/00 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 28, 2017 |
CN |
201710749681.5 |
Claims
1. A port adaptation method implemented by a network device,
comprising: probing whether a first port of the network device is
coupled to a power sourcing equipment; maintaining a state of the
first port as a powered state or changing the state to the powered
state when a probing result comprises that the first port is
coupled to the power sourcing equipment; changing the state to a
powering state when the probing result comprises that the first
port is decoupled from the power sourcing equipment and the network
device has a power supply for supplying power; and probing again
whether the first port is coupled to the power sourcing equipment
when the probing result comprises that the first port is decoupled
from the power sourcing equipment and the network device does not
have the power supply for supplying power.
2. The port adaptation method of claim 1, further comprising
determining whether the network device has the power supply for
supplying power.
3. The port adaptation method of claim 2, wherein when the network
device has the power supply for supplying power and before probing
whether the first port is coupled to the power sourcing equipment,
the port adaptation method further comprises determining the state,
and wherein the state comprises a decoupled state, the powering
state, or the powered state.
4. The port adaptation method of claim 3, further comprising
probing whether the first port is coupled to the power sourcing
equipment when the state comprises the decoupled state or the
powered state.
5. The port adaptation method of claim 3, further comprising
detecting whether the first port is coupled to a valid powered
device when the state comprises the powering state.
6. The port adaptation method of claim 5, further comprising:
maintaining the powering state when a detection result is valid;
and changing the state to the powered state when the detection
result is invalid.
7. The port adaptation method of claim 6, further comprising
changing the state to the powered state after a switching period
expires and each detection result in the switching period is
invalid.
8. The port adaptation method of claim 6, wherein after changing
the state to the powered state, the port adaptation method further
comprises probing again whether the first port is coupled to the
power sourcing equipment.
9. The port adaptation method of claim 2, further comprising
changing the state to the powering state after a switching period
expires and each probing result in the switching period comprises
that the first port is decoupled from the power sourcing
equipment.
10. The port adaptation method of claim 1, further comprising
stopping probing on the first port after the first port is coupled
to the power sourcing equipment or after the first port is locked
as a power drawing port.
11. The port adaptation method of claim 10, wherein after locking
the first port as the power drawing port, the port adaptation
method further comprises unlocking the first port to perform
probing on the first port again when the network device is abnormal
or a device coupled to the first port changes.
12. A port adaptation apparatus implemented by a network device,
comprising: a power sourcing chip; a powered chip; and an
adaptation circuit coupled to the power sourcing chip, the powered
chip, and a first port of the network device and configured to:
probe whether the first port is coupled to a power sourcing
equipment; maintain or change the first port to be coupled to the
powered chip when a probing result comprises that the first port is
coupled to the power sourcing equipment; change the first port to
be coupled to the power sourcing chip and a state of the first port
to a powering state when the probing result comprises that the
first port is decoupled from power sourcing equipment and the
network device has a power supply for supplying power; and probe
again whether the first port is coupled to the power sourcing
equipment when the probing result comprises that the first port is
decoupled from the power sourcing equipment and the network device
does not have the power supply for supplying power.
13. The port adaptation apparatus of claim 12, wherein when the
network device has the power supply for supplying the power, the
power sourcing chip is configured to: detect whether the first port
is coupled to a valid powered device when the power sourcing chip
is coupled to the first port; and feed back a detection result of
the first port to the adaptation circuit, and wherein the
adaptation circuit is further configured to: lock the first port as
a power sourcing port when the detection result is valid; and
change the first port to be coupled to the powered chip and the
state to the powered state when the detection result is
invalid.
14. The port adaptation apparatus of claim 12, wherein when the
network device has the power supply for supplying the power, the
adaptation circuit is further configured to: probe, in a switching
period, whether the first port is coupled to the power sourcing
equipment; and change the first port to be coupled to the power
sourcing chip after the switching period expires and the probing
result comprises that the first port is decoupled from the power
sourcing equipment.
15. The port adaptation apparatus of claim 12, wherein the
adaptation circuit is further configured to stop probing on the
first port after the first port is coupled to the power sourcing
equipment or after locking the first port as a power drawing
port.
16. The port adaptation apparatus of claim 12, wherein the
adaptation circuit is further configured to: lock the first port as
a power drawing port; and unlock the first port to perform probing
on the first port again when the network device is abnormal or a
device coupled to the first port changes.
17. The port adaptation apparatus of claim 12, wherein the
adaptation circuit comprises: a voltage detector coupled to the
first port and configured to: probe whether a valid input voltage
exists on the first port to probe whether the first port is coupled
to the power sourcing equipment; and feed back a second probing
result of the first port to a controller; a switch coupled to the
power sourcing chip, the powered chip, and the first port; and the
controller coupled to the voltage detector and the switch and
configured to: send a first instruction to the switch when the
second probing result comprises that the first port is coupled to
the power sourcing equipment and the state does not comprise a
powered state, wherein the first instruction instructs the switch
to couple the first port and the powered chip, and wherein the
state is changed to the powered state; and send a second
instruction to the switch when the second probing result comprises
that the first port is not coupled to the power sourcing equipment
and the network device has the power supply for supplying the
power, wherein the second instruction instructs the switch to
couple the first port and the power sourcing chip, and wherein the
state is changed to the powering state.
18. The port adaptation apparatus of claim 17, wherein the power
sourcing chip is configured to: detect whether the first port is
coupled to a valid powered device after the state is changed to the
powering state; and feed back a detection result of the first port
to the controller, and wherein the controller is further configured
to: receive the detection result from the power sourcing chip; lock
the first port as a power sourcing port when the detection result
is valid; and send the first instruction to the switch to instruct
the switch to couple the first port and the powered chip and change
the state to the powered state when the detection result is
invalid.
19. The port adaptation apparatus of claim 17, wherein the switch
is further configured to: receive the first instruction from the
controller; couple the first port and the powered chip according to
the first instruction; receive the second instruction from the
controller; and couple the first port and the power sourcing chip
according to the second instruction.
20. A power supply system, comprising: a power sourcing equipment;
a powered device; and an intermediate device, comprising: a first
port coupled to the power sourcing equipment; a second port coupled
to the powered device; a first port adaptation apparatus,
comprising: a first power sourcing chip; a first powered chip; and
a first adaptation circuit coupled to the first power sourcing
chip, the first powered chip, and the first port and configured to:
probe whether the first port is coupled to the power sourcing
equipment; maintain or change the first port to be coupled to the
first powered chip when the first port is coupled to the power
sourcing equipment; change the first port to be coupled to the
first power sourcing chip to change the first port to a powering
state when the first port is decoupled from the power sourcing
equipment and the first port adaptation apparatus has a power
supply for supplying power; and probing again whether the first
port is coupled to the power sourcing equipment when a probing
result comprises that the first port is decoupled from the power
sourcing equipment and the first port adaption apparatus does not
have the power supply for supplying power; and a second port
adaptation apparatus, comprising: a second power sourcing chip; a
second powered chip; and a second adaptation circuit coupled to the
second power sourcing chip, the second powered chip, and the second
port and configured to: probe whether the second port is coupled to
the power sourcing equipment; maintain or change the second port to
be coupled to the second powered chip when the first port is
coupled to the power sourcing equipment; change the first port to
be coupled to the second power sourcing chip to change the first
port to the powering state when the first port is decoupled from
the power sourcing equipment and the second port adaptation
apparatus has the power supply for supplying the power; and probing
again whether the second port is coupled to the power sourcing
equipment when the probing result comprises that the second port is
decoupled from the power sourcing equipment and the second port
adaptation apparatus does not have the power supply for supplying
power.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation of U.S. patent
application Ser. No. 16/114,896 filed on Aug. 28, 2018, which
claims priority to Chinese Patent Application No. 201710749681.5
filed on Aug. 28, 2017. Both of the aforementioned applications are
hereby incorporated by reference in their entireties.
TECHNICAL FIELD
[0002] The present disclosure relates to the communications field,
and in particular, to a port adaptation method and apparatus.
BACKGROUND
[0003] Power over Ethernet (PoE) is a technology used to
simultaneously transmit Ethernet data and power using a twisted
pair. The power refers to provided electricity. As defined in a PoE
standard of the Institute of Electrical and Electronics Engineers
(IEEE), a PoE device includes power sourcing equipment (also
referred to as PSE), and a powered device (also referred to as PD).
The PSE provides power. The PD draws power.
[0004] Currently, some network devices serve as both a PSE that
supplies power and a PD that draws power. For example, a central
access point (AP) in a distributed wireless local area network
(WLAN) serves as both a PD that draws power from a switch and a PSE
that supplies power to a distributed AP. However, whether a PoE
port of the central AP is a power sourcing port (also referred to
as a power providing port) or a power drawing port (also referred
to as a powered port) cannot be distinguished from an appearance of
the PoE port, and consequently a connection error is easily
caused.
SUMMARY
[0005] This application provides a port adaptation method and
apparatus, and a system. A port on a network device may adaptively
serve as a power sourcing port or a power drawing port according to
a peer connected device such that not only flexibility of setting a
device port can be improved, but also a connection error problem
during device connection can be avoided, thereby reducing manual
installation costs, and improving network deployment
efficiency.
[0006] According to a first aspect, a port adaptation method is
provided, including probing whether a first port of a network
device is connected to power sourcing equipment, and maintaining a
state of the first port as a powered state or changing the state of
the first port to the powered state , and may locking the first
port as a power drawing port, such as setting a lock mark, if a
probing result is that the first port is connected to power
sourcing equipment, or maintaining the state of the first port as a
powering state or changing the state of the first port to the
powering state if a probing result is that the first port is not
connected to power sourcing equipment and the network device has a
power supply for supplying power.
[0007] In the foregoing port adaptation method, whether the first
port of the network device is connected to power sourcing equipment
is probed, and if the first port is connected to power sourcing
equipment, the first port may adaptively serve as a power drawing
port. If the network device has a power supply for supplying power,
and the first port is not connected to power sourcing equipment,
the first port may be changed to the powering state, and detection
is performed on the first port in order to determine whether the
first port is used as a power sourcing port. In this way, the first
port may adaptively serve as a power drawing port or a power
sourcing port according to a connected device. During network
deployment, interconnection can be successfully performed without
manually distinguishing a power sourcing port from a power drawing
port. Therefore, this resolves a connection error problem easily
caused during device interconnection, and improves network
deployment efficiency.
[0008] In a first possible implementation of the first aspect,
after changing the state of the first port to the powering state if
a probing result is that the first port is not connected to power
sourcing equipment, and the network device has a power supply for
supplying power, the method includes detecting whether the first
port is connected to a valid powered device, and maintaining the
powering state of the first port , and may locking the first port
as a power sourcing port, if a detection result is valid, or
changing the state of the first port to the powered state if a
detection result is invalid.
[0009] With reference to the first possible implementation of the
first aspect, in a second possible implementation of the first
aspect, after changing the state of the first port to the powered
state if a detection result is invalid, the method includes probing
again whether the first port of the network device is connected to
power sourcing equipment.
[0010] In this way, in an initial phase of device interconnection
during network deployment, using state changing of the first port,
connection can be successfully performed regardless of whether the
first port is connected to power sourcing equipment or a powered
device, and without a need to distinguish whether a port is a power
sourcing port or a power drawing port. Therefore, network
deployment efficiency is improved.
[0011] With reference to any one of the first aspect, or the first
and the second possible implementations of the first aspect, in a
third possible implementation of the first aspect, a switching
period is set for the network device, and the state of the first
port is changed according to the switching period. Further, the
method includes changing the state of the first port to the
powering state after the switching period expires if the network
device has a power supply for supplying power, and each probing
result in the switching period is that the first port is not
connected to power sourcing equipment, and changing the state of
the first port to the powered state after the switching period
expires if each detection result in the switching period is
invalid.
[0012] In this way, a problem that one probing or detection result
is inaccurate, or a frequent changing problem caused by a time
window during device interconnection can be avoided.
[0013] With reference to any one of the first aspect, or the first
to the third possible implementations of the first aspect, in a
fourth possible implementation of the first aspect, the method
includes continuing to probe whether the first port is connected to
power sourcing equipment, if the probing result is that the first
port is not connected to power sourcing equipment, and the network
device has no power supply for supplying power.
[0014] With reference to any one of the first to the fourth
possible implementations of the first aspect, in a fifth possible
implementation of the first aspect, after locking the first port as
a power drawing port, the method includes unlocking the first port
if the network device is abnormal or a device connected to the
first port changes in order to perform probing on the first port
again. In this way, in a network scenario in which a device
interconnected with the first port frequently changes, a port does
not need to be manually distinguished, and the first port may
adaptively serve as a power drawing port or a power sourcing port
such that a connection error rate is reduced, and network
maintenance efficiency can be improved.
[0015] With reference to any one of the first aspect, or the first
to the fifth possible implementations of the first aspect, in a
sixth possible implementation of the first aspect, the method
includes stop performing probing on the first port once it is
probed that the first port is connected to power sourcing equipment
such that device processing overheads can be reduced, or stop
performing probing on the first port when or after the first port
is locked as a power drawing port.
[0016] According to a second aspect, a port adaptation apparatus is
provided, and applied to a network device, where the port
adaptation apparatus includes a power sourcing chip, a powered
chip, and an adaptation module, the power sourcing chip is
connected to the adaptation module, the powered chip is connected
to the adaptation module, and the adaptation module is connected to
a first port of the network device, and the adaptation module is
configured to probe whether the first port is connected to power
sourcing equipment, and maintain or change the first port to be
connected to the powered chip if a probing result is that the first
port is connected to power sourcing equipment such that a powered
state of the first port is maintained or the first port is changed
to a powered state (when the state of the first port is not the
powered state, change the first port to be connected to the powered
chip such that the state of the first port is changed to the
powered state, or when the state of the first port is the powered
state, maintain the state of the first port), and may lock the
first port as a power drawing port, or change the first port to be
connected to the power sourcing chip if a probing result is that
the first port is not connected to power sourcing equipment, and
the network device has a power supply for supplying power such that
a state of the first port is changed to a powering state.
[0017] According to the network device provided in this
application, a power sourcing chip and a powered chip are
configured for the first port on the network device such that the
first port can adaptively serve as a power sourcing port or a power
drawing port according to a connected device. In this way, during
device interconnection, whether a port is a power sourcing port or
a power drawing port does not need to be manually distinguished
such that labor costs and a connection error rate are reduced, and
network deployment efficiency is improved.
[0018] With reference to the second aspect, in a first possible
implementation of the second aspect, the power sourcing chip is
configured to, if the power sourcing chip is connected to the first
port, and the network device has a power supply for supplying
power, detect whether the first port is connected to a valid
powered device, and feedback a detection result of the first port
to the adaptation module, and the adaptation module is further
configured to maintain that the first port is connected to the
power sourcing chip to maintain the powering state of the first
port, and may lock the first port as a power sourcing port, when
the detection result of the first port is valid, or change the
first port to be connected to the powered chip when the detection
result of the first port is invalid such that the state of the
first port is changed to the powered state.
[0019] With reference to the first possible implementation of the
second aspect, in a second possible implementation of the second
aspect, a switching period is set for the adaptation module, and
the adaptation module is configured to change the state of the
first port according to the switching period if the network device
has a power supply for supplying power, and the adaptation module
is further configured to change the first port to the powered state
after the switching period expires when each detection result of
the first port in the switching period is invalid.
[0020] With reference to any one of the second aspect, or the first
and the second possible implementations of the second aspect, in a
third possible implementation of the second aspect, the adaptation
module is further configured to probe, in the switching period,
whether the first port is connected to power sourcing equipment,
and when each probing result in the switching period is invalid
(that is, each probing result is that the first port is not
connected to power sourcing equipment), after the switching period
expires, change the first port to be connected to the power
sourcing chip.
[0021] In this way, a problem that one probing or detection result
is inaccurate, or overheads caused by frequent changing in a device
interconnection process can be avoided.
[0022] With reference to any one of the second aspect, or the first
to the third possible implementations of the second aspect, in a
fourth possible implementation of the second aspect, the adaptation
module is further configured to continue to probe whether the first
port is connected to power sourcing equipment, if the probing
result is that the first port is not connected to power sourcing
equipment, and the network device has no power supply for supplying
power.
[0023] With reference to any one of the second aspect, or the first
to the fourth possible implementations of the second aspect, in a
fifth possible implementation of the second aspect, the adaptation
module is further configured to stop performing probing on the
first port once probing the first port is connected to power
sourcing equipment such that device processing overheads can be
reduced, or stop performing probing on the first port when or after
locking the first port as a power drawing port, and after locking
the first port as a power drawing port, the adaptation module is
further configured to unlock the first port if the network device
is abnormal, or a device connected to the first port changes in
order to perform probing on the first port again.
[0024] With reference to any one of the second aspect, or the first
to the fifth possible implementations of the second aspect, in a
sixth possible implementation of the second aspect, the adaptation
module includes a voltage detector, a switching switch, and a
controller, the voltage detector is connected to the first port,
the power sourcing chip is connected to the switching switch, and
the powered chip is connected to the switching switch, the
switching switch is connected to the first port, the voltage
detector is configured to probe whether a valid input voltage
exists on the first port in order to probe whether the first port
is connected to power sourcing equipment, and feedback a probing
result of the first port to the controller, the controller is
configured to, if the probing result is that the first port is
connected to power sourcing equipment, and the state of the first
port is not the powered state (a disconnected state or the powering
state), send a first instruction to the switching switch, where the
first instruction is used to instruct the switching switch to
connect the first port and the powered chip such that the state of
the first port is changed to the powered state, and may lock the
first port as a power drawing port, and the controller is further
configured to, if the probing result is that the first port is not
connected to power sourcing equipment, and the network device has a
power supply for supplying power, send a second instruction to the
switching switch, where the second instruction is used to instruct
the switching switch to connect the first port and the power
sourcing chip such that the state of the first port is changed to
the powering state.
[0025] With reference to the sixth possible implementation of the
second aspect, in a seventh possible implementation of the second
aspect, the controller is further configured to receive a detection
result of the first port fed back by the power sourcing chip, and
when the detection result of the first port is valid, lock the
first port as a power sourcing port, or when the detection result
of the first port is invalid, send the first instruction to the
switching switch to instruct the switching switch to connect the
first port and the powered chip such that the state of the first
port is changed to the powered state.
[0026] Optionally, the controller is further configured to send the
first instruction to the switching switch after the switching
period expires when each detection result of the first port in the
switching period is invalid such that the state of the first port
is changed to the powered state.
[0027] With reference to any one of the sixth or the seventh
possible implementation of the second aspect, in an eighth possible
implementation of the second aspect, the controller is configured
to send the second instruction to the switching switch after the
switching period expires when each probing result of the first port
in the switching period is invalid (no power sourcing equipment is
connected) such that the state of the first port is changed to the
powering state.
[0028] With reference to any one of the sixth to the eighth
possible implementations of the second aspect, in a ninth possible
implementation of the second aspect, the switching switch is
configured to receive the first instruction sent by the controller,
and connect the first port and the powered chip according to the
first instruction, and the switching switch is further configured
to receive the second instruction sent by the controller, and
connect the first port and the power sourcing chip according to the
second instruction.
[0029] With reference to any one of the sixth to the ninth possible
implementations of the second aspect, in a tenth possible
implementation of the second aspect, after the locking the first
port as a power drawing port, the controller is further configured
to unlock the first port if the network device is abnormal or the
device connected to the first port changes in order to perform
probing on the first port again.
[0030] According to a third aspect, a network device is provided,
the network device includes a first port and the port adaptation
apparatus according to any one of the second aspect and the
possible implementations of the second aspect, and the port
adaptation apparatus corresponds to the first port.
[0031] Optionally, the network device further includes a second
port, and the second port is connected to a power sourcing chip and
is a power sourcing port. Further, optionally, the network device
further includes a third port, and the third port is connected to a
powered chip and is a power drawing port.
[0032] Optionally, the network device further includes a processor
and a memory.
[0033] According to a fourth aspect, a power supply system is
provided, including power sourcing equipment, an intermediate
device, and a powered device, a first port of the intermediate
device is connected to the power sourcing equipment, a second port
of the intermediate device is connected to the powered device, the
intermediate device includes a first port adaptation apparatus
according to any one of the second aspect and the possible
implementations of the second aspect, and a second port adaptation
apparatus according to any one of the second aspect and the
possible implementations of the second aspect, the first port
adaptation apparatus corresponds to the first port, and the second
port adaptation apparatus corresponds to the second port.
[0034] Optionally, the power sourcing equipment includes the port
adaptation apparatus according to any one of the second aspect and
the possible implementations of the second aspect.
[0035] Optionally, the powered device includes the port adaptation
apparatus according to any one of the second aspect and the
possible implementations of the second aspect.
[0036] According to a fifth aspect, a computer storage medium is
provided, and configured to store a computer program, where the
computer program includes instructions used to execute the port
adaptation method in the first aspect.
BRIEF DESCRIPTION OF DRAWINGS
[0037] FIG. 1 is a schematic structural diagram of a PoE device
according to an embodiment of the present disclosure;
[0038] FIG. 2 is a schematic structural diagram of another PoE
device according to an embodiment of the present disclosure;
[0039] FIG. 3 is a schematic circuit diagram of a port adaptation
apparatus in a PoE device according to an embodiment of the present
disclosure;
[0040] FIG. 4 is a schematic topology diagram of a distributed WLAN
according to an embodiment of the present disclosure; and
[0041] FIG. 5 is a flowchart of a port adaptation method according
to an embodiment of the present disclosure.
DESCRIPTION OF EMBODIMENTS
[0042] The following describes technical solutions provided in this
application with reference to the accompanying drawings and
specific implementations.
[0043] Referring to FIG. 1, FIG. 1 is a schematic structural
diagram of a PoE device 10 according to an embodiment of the
present disclosure. The PoE device 10 includes a PoE port 101, an
adaptation module 102, a PSE chip 101-1, and a PD chip 101-2. The
PSE chip 101-1 and the PD chip 101-2 are separately connected to
the adaptation module 102, and the PoE port 101 is connected to the
adaptation module 102.
[0044] The PSE chip 101-1 is connected to a power management system
(not shown) of the PoE device 10, and may draw power from the power
management system. The PD chip 101-2 is connected to the power
management system of the PoE device 10, and may provide power for
the power management system.
[0045] The adaptation module 102 is configured to probe whether the
PoE port 101 is connected to power sourcing equipment, and if a
probing result is that the PoE port 101 is connected to power
sourcing equipment, maintain that the PoE port 101 is connected to
the PD chip 101-2 or change the PoE port 101 to be connected to the
PD chip 101-2 such that a powered state of the PoE port 101 is
maintained or the PoE port 101 is changed to a powered state, and
lock the PoE port 101 as a power drawing port, such as setting a
lock mark (the state of the PoE port 101 is not to be changed), or
if a probing result is that the PoE port 101 is not connected to
power sourcing equipment, and the PoE device 10 has a power supply
for supplying power, change the PoE port 101 to be connected to the
PSE chip 101-1 such that a state of the PoE port 101 is changed to
a powering state.
[0046] The PoE port 101 may be in any state at an initial moment. A
port state includes a disconnected state, a PSE state, and a PD
state. The disconnected state indicates that the PoE port 101 is
neither connected to the PSE chip 101-1 nor connected to the PD
chip 101-2. A first state is also referred to as a powering state
or a PSE state, and indicates that the PoE port 101 is connected to
the PSE chip (or power sourcing chip) 101-1. A second state is also
referred to as a powered state or a PD state, and indicates that
the PoE port 101 is connected to the PD chip (or powered chip)
101-2.
[0047] If the PoE device 10 has no power supply for supplying
power, regardless of the state of the PoE port 101, the adaptation
module 102 probes whether the PoE port 101 is connected to power
sourcing equipment. When probing that the PoE port 101 is connected
to power sourcing equipment, the adaptation module 102 maintains
the PD state of the PoE port 101 or changes the state of the PoE
port 101 to the PD state (that is, maintains that the PoE port 101
is connected to the PD chip 101-2 or changes the PoE port 101 to be
connected to the PD chip 101-2), and locks the PoE port 101 as a
power drawing port. Further, if the PoE port 101 is in the PD
state, the PD state of the PoE port 101 is maintained (that is,
that the PoE port 101 is connected to the PD chip 101-2 is
maintained). In a specific implementation, when maintaining the PD
state, the adaptation module may not perform any operation. If the
state of the PoE port 101 is not the PD state (but the PSE state or
the disconnected state), the PoE port 101 is changed to be
connected to the PD chip 101-2. In addition, the adaptation module
102 may stop probing. When the PoE port 101 is not connected to
power sourcing equipment, the adaptation module 102 continuously
performs probing on the PoE port 101.
[0048] If the PoE device 10 has a power supply for supplying power,
and the PoE port 101 is in the PD state or the disconnected state,
the adaptation module 102 probes whether the PoE port 101 is
connected to power sourcing equipment. When probing that the PoE
port 101 is connected to power sourcing equipment, the adaptation
module 102 maintains the PD state of the PoE port 101 or changes
the PoE port 101 to the PD state (that is, maintains that the PoE
port 101 is connected to the PD chip 101-2 or changes the PoE port
101 to be connected to the PD chip 101-2), and locks the PoE port
101 as a power drawing port. In addition, the adaptation module 102
may stop probing. When the PoE port 101 is not connected to power
sourcing equipment, the PoE port 101 is changed to the PSE
state.
[0049] If the PoE device 10 has a power supply for supplying power,
and the PoE port 101 is in the PSE state, the PSE chip 101-1
detects whether the PoE port is connected to a valid PD. Further,
the PSE chip 101-1 may send a detection voltage to the PoE port 101
to measure impedance of the PoE port 101, and may determine,
according to the measured impedance, whether the PoE port 101 is
connected to a valid PD to obtain a detection result. The detection
result may be valid or invalid. When the detection result is valid,
it indicates that the PoE port 101 is connected to a valid PD. When
the detection result is invalid, it indicates that the PoE port 101
is not connected to a valid PD or is not connected to any device.
The PSE chip 101-1 may feedback the detection result to the
adaptation module 102. In addition, the PSE chip 101-1 stops
detection. When the detection result indicates a valid PD, the
adaptation module 102 maintains the PSE state of the PoE port 101
(that is, maintains that the PoE port 101 is connected to the PSE
chip 101-1), and locks the PoE port 101 as a power sourcing port.
In a specific implementation, when maintaining the PSE state of the
PoE port 101, the adaptation module may not perform any operation.
When the detection result is invalid, the adaptation module 102
changes the PoE port 101 to be connected to the PD chip 101-2 such
that the PoE port 101 is changed to the PD state.
[0050] In this embodiment of the present disclosure, a power supply
for supplying power may be implemented using PoE, or a local power
supply (such as an adapter power supply) for supplying power.
[0051] In a specific implementation, to avoid frequent changing,
the adaptation module 102 may set a switching period, that is, set
a time limit of state changing of the PoE port 101. In this time
limit, even if each probing or detection result meets a switching
condition, changing is not immediately performed, but changing is
performed after the time limit expires. In one switching period,
the state of the PoE port 101 may be maintained. After the
switching period expires, if the switching condition is met, the
PoE port 101 may be changed from one state to another state. For
example, the disconnected state of the PoE port 101 is changed to
the PSE state or the PD state of the PoE port 101. For another
example, the PSE state of the PoE port 101 is changed to the PD
state of the PoE port 101. Alternatively, the PD state of the PoE
port 101 is changed to the PSE state of the PoE port 101.
[0052] It may be understood that only when the PoE device 10 has a
power supply for supplying power, the adaptation module 102 can
change the port state, and the switching period can take
effect.
[0053] If the PoE device 10 has no power supply for supplying
power, and the PoE port 101 is not connected to power sourcing
equipment, the adaptation module 102 does not change the port
state, can only continuously perform probing on the PoE port 101,
and can perform changing only after probing that the PoE port 101
is connected to power sourcing equipment. For example, the
disconnected state is changed to the PD state (it may be understood
that changing may not be performed in this case, for example, if
the state of the PoE port 101 is the PD state, the PD state of the
PoE port 101 is maintained), and further the adaptation module 102
locks the PoE port 101 as a power drawing port.
[0054] Only when the PoE device 10 has a power supply for supplying
power, the PSE chip 101-1 can work, and the PoE port 101 may serve
as a power sourcing port.
[0055] The adaptation module 102 may perform probing on the PoE
port 101 for a plurality of times in one switching period.
[0056] If the adaptation module 102 probes that the PoE port 101 is
connected to power sourcing equipment, the adaptation module 102
maintains the PD state or changes the state of the PoE port 101 to
the PD state (may immediately change the PoE port 101 to the PD
state, or may change the PoE port 101 to the PD state after the
switching period expires), and locks the PoE port 101 as a power
drawing port, such as setting a lock mark (the state of the PoE
port 10 is not to be changed after locking). The PoE port 101 is
locked as a power drawing port. In addition, if the PoE port 101 is
locked as a power drawing port, the adaptation module 102 may stop
probing, and may also stop timing of the switching period. It may
be understood that timing of the switching period may be stopped
after it is probed that the PoE port 101 is connected to power
sourcing equipment. Subsequently, if the PoE device 10 is abnormal
(for example, the PD chip 101-2 is faulty, or the PoE device 10 is
faulty), or a device connected to the PoE port 101 changes (for
example, connected power sourcing equipment is disconnected or
faulty), the PoE port 101 is unlocked (the PoE port 101 may enter
the disconnected state, the PD state, or the PSE state) such that a
port adaptation process described in this embodiment of the present
disclosure is performed on the PoE port 101 again. Details are not
described herein.
[0057] If the adaptation module 102 probes that the PoE port 101 is
not connected to power sourcing equipment in the switching period
(in the switching period, the PoE port 101 is not connected to
power sourcing equipment during each time of probing), the
adaptation module 102 may change the state of the PoE port 101
after the switching period expires. Further, the adaptation module
102 changes the PoE port 101 to the PSE state (that is, changes the
PoE port 101 to be connected to the PSE chip 101-1).
[0058] In a specific implementation, the PSE chip 101-1 may perform
detection on the PoE port 101 for a plurality of times in one
switching period.
[0059] If the PSE chip 101-1 detects that the PoE port 101 is
connected to a valid PD, the PSE chip 101-1 may feedback a
detection result (valid) to the adaptation module 102. The PSE chip
101-1 may stop detection after detecting that the PoE port 101 is
connected to a valid PD. The adaptation module 102 may lock the PoE
port 101 as a power sourcing port. If the PoE port 101 is locked as
a power sourcing port, the adaptation module 102 does not need to
change the state of the PoE port, and may stop timing of the
switching period. Subsequently, if the PoE device 10 is abnormal
(for example, the PSE chip 101-1 is faulty, or the PoE device 10 is
faulty, or a power supplying status of the PoE device 10 changes
(from having a power supply for supplying power to having no power
supply for supplying power)), or a device connected to the PoE port
101 changes (the connected device is disconnected or faulty), or
the like, the PoE port 101 is unlocked (the PoE port 101 may enter
the disconnected state, the PD state, or the PSE state) such that
the port adaptation process described in this embodiment of the
present disclosure is performed on the PoE port 101 again. Details
are not described herein.
[0060] If the adaptation module 102 detects that the PoE port 101
is not connected to a valid PD in the switching period (each
detection result in the switching period is invalid), the
adaptation module 102 may change the state of the PoE port 101
after the switching period expires. Further, the adaptation module
102 changes the PoE port 101 to the PD state (that is, changes the
PoE port 101 to be connected to the PD chip 101-2).
[0061] In this embodiment of the present disclosure, the switching
period may be determined based on duration required by the
adaptation module 102 to perform one time of probing and duration
required by the PSE chip 101-1 to perform one time of detection.
For example, the switching period is set to an integer multiple of
the longer one of the duration required for one time of probing and
the duration required for one time of detection. This is not
limited in the present disclosure.
[0062] In a specific implementation, in the switching period, the
adaptation module 102 may stop performing probing on the PoE port
101 once probing that the PoE port 101 is connected to power
sourcing equipment, but not when or after locking the PoE port 101
as a power drawing port. Once detecting that the PoE port 101 is
connected to a valid PD, the PSE chip 101-1 stops performing
detection on the PoE port 101. After probing or detection is
stopped, if the PoE device 10 is abnormal, or the device connected
to the PoE port 101 is disconnected, or the like, the PoE port 101
may be unlocked (the PoE port 101 may enter the disconnected state,
the PD state, or the PSE state) in order to perform detection or
probing on the PoE port 101 again.
[0063] In this embodiment of the present disclosure, the PoE port
101 may adaptively serve as a power sourcing port or a power
drawing port according to the connected device.
[0064] The PoE device 10 in this embodiment of the present
disclosure may be an Ethernet device that supports PoE, such as a
switch, a router, or an AP. The PSE chip 101-1 is designed to meet
a PSE function in a PoE protocol requirement, and usually provides
a function such as detection and classification.
[0065] In addition to the PoE port 101, the PoE device 10 may
include another PoE port. The other PoE port may be a power
sourcing port directly connected to the PSE chip 101-1, or may be a
power drawing port directly connected to the PD chip 101-2, or may
be an adaptive port like the PoE port 101. This is not limited in
the present disclosure.
[0066] For example, as shown in FIG. 2, the PoE device 10 further
includes a PoE port 103, an adaptation module 104, a PSE chip
103-1, and a PD chip 103-2. The PSE chip 103-1 and the PD chip
103-2 correspond to the PoE port 103. The adaptation modules 102
and 104 may be separately disposed, or may be integrated, and this
is not limited in the present disclosure.
[0067] Further, the PoE device 10 further includes a processor (not
shown), such as a central processing unit (CPU), a network
processor (NP), or a combination of a CPU and an NP. The processor
is used by the PoE device 10 to communicate with another device.
For example, the PoE device 10 performs supply power negotiation,
data transmission, and the like at a data link layer with
interconnected power sourcing equipment or an interconnected
powered device.
[0068] Optionally, the PoE device 10 further includes a memory (not
shown) configured to store data or a program, or data and a
program. The memory may include a volatile memory, such as a random
access memory (RAM). The memory may include a nonvolatile memory,
such as a flash memory, a hard disk drive (HDD), or a solid state
drive (SSD). The memory may further include a combination of the
foregoing memories.
[0069] In this embodiment of the present disclosure, for a PoE
device that can be used as power sourcing equipment or a powered
device, a PSE chip and a PD chip are disposed for a PoE port on the
PoE device such that the PoE port can adaptively serve as a power
sourcing port or a power drawing port according to a connected
device. In this way, when device interconnection is performed
during network deployment, connection can be successfully performed
without distinguishing whether a port is a power sourcing port or a
power drawing port in order to resolve a connection error
problem.
[0070] The PoE device provided in this embodiment of the present
disclosure describes only an example of connection relationships
and functions of components, modules, and the like that are in the
PoE device and that are related to the present disclosure. Persons
skilled in the art may understand that the PoE device may further
include another component according to a function and a service
requirement. For example, if the PoE device is a wireless AP, the
PoE device may further include a WLAN chip, an antenna, and the
like. This is not limited in the present disclosure.
[0071] Referring to FIG. 3, FIG. 3 is a schematic circuit diagram
of a port adaptation apparatus 100 in a PoE device 10 according to
an embodiment of the present disclosure. As shown in FIG. 3, the
port adaptation apparatus 100 includes a PSE chip 101-1, a PD chip
101-2, a voltage detector 211, a switching switch 212, and a
controller 213.
[0072] The port adaptation apparatus 100 corresponds to a PoE port
101 of the PoE device 10. The port adaptation apparatus 100 is
configured to enable the PoE port 101 to adaptively serve as a
power sourcing port or a power drawing port.
[0073] The PSE chip 101-1 is connected to a power supply system,
and may supply power to a peer powered device (for example,
provides 48 volts (V) voltage). The PD chip 101-2 may draw power
from peer power sourcing equipment and provide power for the power
supply system of the PoE device 10.
[0074] Optionally, the voltage detector 211, the switching switch
212, and the controller 213 are considered as one implementation of
the adaptation module 102 shown in FIG. 1.
[0075] The switching switch 212 may be understood as a double pole
double throw switch, and may be implemented using a metal-oxide
semiconductor field-effect transistor (MOSFET), a relay, an
optocoupler, a transistor, and the like. The double pole double
throw switch may also be understood as two single pole double throw
switches that are controlled according to a unified rule, that is,
two single pole double throw switches that work at the same time.
FIG. 3 includes a schematic diagram of the switching switch
212.
[0076] The switching switch 212 is configured to connect the PoE
port 101 and the PSE chip 101-1, or connect the PoE port 101 and
the PD chip 101-2. Further, referring to FIG. 3, when 1A is
connected to 1-{circle around (1)}, 1B is connected to 1-{circle
around (2)} at the same time such that the PoE port 101 is
connected to the PSE chip 101-1. When 1A is connected to 2-{circle
around (1)} 1B is connected to 2-{circle around (2)} at the same
time such that the PoE port 101 is connected to the PD chip
101-2.
[0077] The controller 213 is configured to control the switching
switch 212.
[0078] The switching switch 212 shown in FIG. 3 is in a
disconnected state. The PoE port 101 is neither connected to the
PSE chip 101-1 nor connected to the PD chip 101-2. That is, the PoE
port 101 is in the disconnected state.
[0079] The voltage detector 211 is configured to probe whether a
valid input voltage exists on the PoE port 101 in order to probe
whether the PoE port 101 is connected to power sourcing equipment,
and feedback a probing result of the PoE port 101 to the controller
213.
[0080] The valid input voltage is a voltage that meets a PoE
standard specification, for example, 2.8 V to 57 V, including a
detection voltage in a detection phase, or a classification voltage
in a classification phase, or a voltage in a power-on phase, or a
supply voltage in a powering phase.
[0081] The probing result may be valid or invalid. The probing
result is valid, that is, the PoE port 101 has a valid input
voltage, indicating that the PoE port 101 is connected to power
sourcing equipment. The probing result is invalid, that is, the PoE
port 101 has no valid input voltage, indicating that the PoE port
101 is not connected to power sourcing equipment. When the probing
result is invalid, the PoE port 101 may be connected to non-power
sourcing equipment (for example, a powered device, or a common
non-PoE device), or the PoE port 101 may be not connected to any
device.
[0082] The controller 213 is configured to, if the probing result
is that the PoE port 101 is connected to power sourcing equipment,
and the PoE port 101 is in the disconnected state or the PSE state,
send a first instruction to the switching switch 212, where the
first instruction is used to instruct the switching switch 212 to
connect the PoE port 101 and the PD chip 101-2 such that the state
of the PoE port 101 is changed to the powered state, and then lock
the PoE port 101 as a power drawing port, such as setting a lock
mark in order to maintain that the PoE port 101 is connected to the
PD chip 101-2.
[0083] The controller 213 is further configured to, if the probing
result is that the PoE port 101 is not connected to power sourcing
equipment, and the PoE device 10 has a power supply for supplying
power, send a second instruction to the switching switch 212, where
the second instruction is used to instruct the switching switch 212
to connect the PoE port 101 and the PSE chip 101-1 such that the
state of the PoE port 101 is changed to the powering state.
[0084] If the PoE device 10 has no power supply for supplying
power, regardless of the state of the PoE port 101, the voltage
detector 211 probes whether the PoE port 101 has a valid input
voltage. If a probing result is invalid (the PoE port 101 is not
connected to power sourcing equipment), the voltage detector 211
continuously performs probing on the PoE port 101. If the probing
result is valid, the voltage detector 211 feeds back the probing
result to the controller 213.
[0085] If the PoE device 10 has a power supply for supplying power,
and the PoE port 101 is in the disconnected state or the PD state,
the voltage detector 211 probes whether the PoE port 101 has a
valid input voltage, and feeds back a probing result to the
controller 213. If the probing result is valid, the controller 213
maintains the powered state of the PoE port 101 (maintains that the
PoE port 101 is connected to the PD chip 101-2) when the PoE port
101 is in the PD state, and sends the first instruction to the
switching switch 212 when the PoE port 101 is in the disconnected
state, to instruct the switching switch 212 to connect the PoE port
101 and the PD chip 101-2 such that the state of the PoE port 101
is changed to the powered state, and then the controller 213 locks
the PoE port 101 as a power drawing port. If the probing result is
invalid, the controller 213 sends the second instruction to the
switching switch 212 to instruct the switching switch 212 to
connect the PoE port 101 and the PSE chip 101-1 such that the PoE
port 101 is changed to the PSE state.
[0086] If the PoE device 10 has a power supply for supplying power,
and the PoE port 101 is in the PSE state (that is, the PSE chip
101-1 is connected to the PoE port 101), the PSE chip 101-1 detects
whether the PoE port 101 is connected to a valid PD, and feeds back
a detection result to the controller 213. The detection result may
be valid or invalid. When the detection result is valid, it
indicates that the PoE port 101 is connected to a valid PD. When
the detection result is invalid, it indicates that the PoE port 101
is not connected to a valid PD or is not connected to any
device.
[0087] It may be understood that the PSE chip 101-1 can work only
when the PoE device 10 has a power supply for supplying power. If
the PoE device 10 has no power supply for supplying power, the PSE
chip 101-1 does not work.
[0088] The controller 213 is further configured to receive the
detection result of the PoE port 101 fed back by the power sourcing
chip, and if the detection result of the PoE port 101 is valid,
lock the PoE port 101 as a power sourcing port (maintain that the
PoE port 101 is connected to the PSE chip 101-1), or if the
detection result of the PoE port 101 is invalid, send the first
instruction to the switching switch 212, to instruct the switching
switch 212 to connect the PoE port 101 and the PD chip 101-2, and
switch the PoE port 101 to the PD state. After the PoE port 101 is
changed to the PD state, the voltage detector 211 probes again
whether the PoE port 101 has a valid input voltage in order to
probe whether the PoE port 101 is connected to power sourcing
equipment.
[0089] If the PoE device 10 has a power supply for supplying power,
whether the PoE port 101 is connected to power sourcing equipment
or whether the PoE port 101 is connected to a valid PD can be
probed or detected in a timely manner by performing switching
between the PSE state and the PD state.
[0090] The controller 213 is further configured to unlock the PoE
port 101. After unlocking, the PoE port 101 may be in the
disconnected state, the PSE state, or the PD state.
[0091] The controller 213 may use one bit in a register as a lock
mark to lock or unlock the PoE port 101. For example, the bit being
1 represents locked, and the bit being 0 represents unlocked. The
register may be a register of the PoE port 101, or may be a
register of the controller. The controller 213 may also set and
store the lock mark in a memory. The lock mark may also be set in
the switching switch 212 and operated by the controller 213. During
locking, the switching switch 212 cannot perform switching, and
after unlocking, the switching switch 212 can perform switching.
Further, there may be a plurality of different implementations, and
this is not limited in the present disclosure.
[0092] The controller 213 may set a switching period that is used
to periodically change the state of the PoE port 101. In one
switching period, the state of the PoE port 101 is unchanged such
that the voltage detector 211 can perform probing on the PoE port
101, or the PSE chip 101-1 can perform detection on the PoE port
101. After the switching period expires, the controller 213
controls the switching switch 212 to change the state of the PoE
port 101. Further, when a probing result of the PoE port 101 is
invalid, the controller 213 sends the second instruction to the
switching switch 212 to instruct the switching switch 212 to
connect the PoE port 101 and the PSE chip 101-1. When a detection
result of the PoE port 101 is invalid, the controller 213 sends the
first instruction to the switching switch 212, to instruct the
switching switch 212 to connect the PoE port 101 and the PD chip
101-2. It may be understood that the switching period takes effect
only when the PoE device 10 has a power supply for supplying
power.
[0093] In one switching period, the voltage detector 211 may
perform probing on the PoE port 101 for a plurality of times, and
the PSE chip 101-1 may perform detection on the PoE port 101 for a
plurality of times. Once the voltage detector 211 probes that the
PoE port 101 has a valid input voltage, the voltage detector 211
may stop probing, and feedback a probing result (valid) of the PoE
port 101 to the controller 213. Once the PSE chip 101-1 detects
that the PoE port 101 is connected to a valid PD, the PSE chip
101-1 may stop detection, and feedback a detection result (valid)
of the PoE port 101 to the controller 213.
[0094] If the PoE device 10 has a power supply for supplying power,
the voltage detector 211 may feedback a probing result to the
controller 213 after each time of probing. The voltage detector 211
may alternatively feedback a probing result to the controller 213
only when the probing result is valid. Then, a new switching period
starts, and the probing result of the PoE port 101 is invalid by
default. Similarly, the PSE chip 101-1 may feedback a detection
result to the controller 213 after each time of detection. The PSE
chip 101-1 may alternatively feedback a detection result to the
controller 213 only when the detection result is valid. Then, a new
switching period starts, and the detection result of the PoE port
101 is invalid by default. The controller 213 may record a probing
or detection result of the PoE port 101, for example, record the
detection result into a register corresponding to the PoE port
101.
[0095] After locking the PoE port 101 as a power sourcing port or a
power drawing port, the controller 213 may stop timing of the
switching period.
[0096] After locking the PoE port 101, if the PoE device 10 is
abnormal or a device connected to the PoE port 101 changes, the
controller 213 unlocks the PoE port 101. After unlocking, the PoE
port 101 may enter the disconnected state, the PD state, or the PSE
state.
[0097] The PSE chip 101-1 shown in FIG. 3 controls a positive
electrode (48 V) of a power supply using a switch (the MOSFET is
used as an example in FIG. 3). In a specific implementation, a
negative electrode (ground) of the power supply may further be
controlled using the switch. In addition, the switch (MOSFET) in
the PSE chip 101-1 in FIG. 3 may alternatively be disposed outside
the PSE chip 101-1, and a working principle is similar. A structure
of the PSE chip 101-1 shown in FIG. 3 in this embodiment of the
present disclosure is merely an example, and this imposes no
limitation on the present disclosure.
[0098] In this embodiment of the present disclosure, a port
adaptation apparatus 100 is disposed for the PoE port 101 on the
PoE device 10. The port adaptation apparatus 100 ensures that the
PoE port 101 adaptively serves as a power sourcing port or a power
drawing port according to an interconnected device without a need
to distinguish whether a port is a power sourcing port or a power
drawing port in order to resolve a connection error problem.
[0099] An embodiment of the present disclosure further provides a
power supply system, including power sourcing equipment, an
intermediate device, and a powered device. The intermediate device
uses the PoE device 10 shown in FIG. 2. A first port of the
intermediate device is connected to the power sourcing equipment, a
second port of the intermediate device is connected to the powered
device, the intermediate device includes a first port adaptation
apparatus and a second port adaptation apparatus shown in FIG. 3,
the first port adaptation apparatus is connected (corresponding) to
the first port, and the second port adaptation apparatus is
connected (corresponding) to the second port. The power sourcing
equipment is configured to supply power to the intermediate device.
The powered device is configured to draw power from the
intermediate device.
[0100] FIG. 4 is a distributed WLAN according to an embodiment of
the present disclosure, and may be understood as a specific
implementation of the foregoing power supply system. The
distributed WLAN uses a PoE device 10 provided in this embodiment
of the present disclosure as a central AP 40 that is upstream
connected to a switch 41 and downstream connected to a distributed
AP 42. The switch 41 is power sourcing equipment, and may supply
power to the central AP 40. The distributed AP 42 is a powered
device, and may draw power from the central AP 40. A PoE port 401
of the central AP 40 is connected to the switch 41, and a PoE port
402 is connected to the distributed AP 42.
[0101] As shown in FIG. 4, one port adaptation apparatus is
disposed on each of the PoE ports 401 and 402 corresponding to the
central AP 40. For a structure, refer to FIG. 3, and FIG. 4 is
merely a simplified schematic diagram. Further, a port adaptation
apparatus 410 is correspondingly disposed on the PoE port 401,
includes a PSE chip 401-1, a PD chip 401-2, and a switch 412, and
further includes a voltage detector (not shown) and a controller
(not shown in FIG. 4). A port adaptation apparatus 420 is
correspondingly disposed on the PoE port 402, includes a PSE chip
402-1, a PD chip 402-2, and a switch 422, and further includes a
voltage detector (not shown) and a controller (not shown in FIG.
4).
[0102] The central AP 40 performs a port adaptation method (shown
in FIG. 5) provided in this embodiment of the present disclosure
such that the PoE port adaptively serves as a power sourcing port
or a power drawing port. Therefore, the central AP 40 serves as a
PD to draw power from the switch 41, and also serves as a PSE to
supply power to the distributed AP 42.
[0103] In FIG. 4, a PSE port of the switch 41 that is connected to
the central AP 40 is a power sourcing port, and represents a port
directly connected to a PSE chip. A PD port of the distributed AP
42 that is connected to the central AP 40 is a power drawing port,
and represents a port directly connected to a PD chip. In a
specific implementation, the switch 41 may further include an
adaptive PoE port and a port adaptation apparatus shown in FIG. 3.
The distributed AP 42 may further include an adaptive PoE port and
a port adaptation apparatus shown in FIG. 3. The central AP 40 may
further include a power sourcing port directly connected to a PSE
chip, and a power drawing port directly connected to a PD chip.
[0104] Referring to FIG. 5, FIG. 5 is a port adaptation method
according to an embodiment of the present disclosure. A PoE device
10 may include a plurality of adaptive PoE ports, and a processing
process of each adaptive PoE port is independent of each other. In
FIG. 5, any adaptive PoE port, for example, a first PoE port of the
PoE device 10 is used as an example for description. The port
adaptation method includes the following steps.
[0105] Step 501: Probe whether the first PoE port of the PoE device
10 is connected to power sourcing equipment.
[0106] In the PoE device 10, a first port adaptation apparatus is
correspondingly disposed for the first PoE port. The first port
adaptation apparatus includes a first PSE chip, a first PD chip, a
first switching switch, a first voltage detector, and a first
controller. For a specific structure, refer to FIG. 3.
[0107] In a first case, the PoE device 10 has no power supply for
supplying power. Regardless of a state of the first PoE port (a
disconnected state, a PSE state, or a PD state), the PoE device 10
probes whether the first PoE port is connected to power sourcing
equipment.
[0108] In a second case, the PoE device 10 has a power supply for
supplying power. When the first PoE port is in a disconnected state
or a PD state, the PoE device 10 probes whether the first PoE port
is connected to power sourcing equipment.
[0109] The probing whether the first PoE port is connected to power
sourcing equipment includes probing, by the PoE device 10 (the
first voltage detector), whether the first PoE port has a valid
input voltage.
[0110] If yes, that is, a probing result is valid (there is a valid
input voltage), it indicates that the first PoE port is connected
to power sourcing equipment, and then step 502 continues.
[0111] If no, that is, a probing result is invalid (there is no
valid input voltage), it indicates that the first PoE port is not
connected to power sourcing equipment, and then step 503 continues.
If a switching period is set, probing is performed for a plurality
of times according to the switching period, and a next step is
performed after the switching period expires.
[0112] In FIG. 4, for example, the central AP 40 is the PoE device
10. When a network is just deployed, the PoE port 401 is in the
disconnected state, and the central AP 40 probes whether the PoE
port 401 is connected to power sourcing equipment. Similarly, the
central AP 40 probes whether the PoE port 402 is connected to power
sourcing equipment.
[0113] If the first PoE port is connected to the first PSE chip,
and the PoE device 10 has a power supply for supplying power, it
may be understood that step 504 is directly performed.
[0114] Step 502: Lock the first PoE port as a power drawing
port.
[0115] If the PoE device 10 probes that the first PoE port is
connected to power sourcing equipment, the PoE device 10 locks the
first PoE port as a powered port in order to maintain that the
first PoE port is connected to the first PD chip. Further, a lock
mark may be set, the first PoE port is locked as a powered port,
and the state of the first PoE port is locked. If the switching
period is set, timing of the switching period may be further
stopped.
[0116] FIG. 4 continues to be used as an example. After the switch
41 works, power is output to the PoE port 401 (such as sending a
detection voltage, powering-on, or supplying power). However, the
distributed AP 42 is a powered device, and does not output power to
the PoE port 402. Therefore, the central AP 40 probes that the PoE
port 401 is connected to power sourcing equipment. The central AP
40 determines, according to a probing result, that the PoE port 401
is a power drawing port (the PoE port 401 is locked as a power
drawing port). Further, the central AP 40 connects the PoE port 401
and the PD chip 401-2 (the PoE port 401 is originally in the
disconnected state), and locks the PoE port 401 in order to
maintain that the PoE port 401 is connected to the PD chip 401-2.
Then, the PoE port 401 draws power from connected power sourcing
equipment (that is, the switch 41). The PD chip 401-2 draws power
from the switch 41 and provides power for the central AP 40. After
the central AP 40 obtains power from the switch 41 using the PoE
port 401, other components in the central AP 40 can work, such as a
processor, a WLAN chip, and the PSE chip 402-1. The PSE chip 402-1
may perform detection on and supply power to the PoE port 402 in
order to supply power to the distributed AP 42. In this way, the
PoE port 401 and the PoE port 402 adaptively serve as a power
drawing port and a power sourcing port respectively according to
connected devices. The central AP 40 serves as a PD to draw power
from the switch 41, and serves as a PSE to supply power to the
distributed AP 42.
[0117] Step 503: Determine whether the PoE device 10 has a power
supply for supplying power.
[0118] Further, when the first PoE port is not connected to power
sourcing equipment, whether the PoE device 10 has a power supply
for supplying power is determined.
[0119] If the PoE device 10 has no power supply for supplying
power, whether the first PoE port is connected to power sourcing
equipment continues to be probed, that is, step 501 is performed
again. When the PoE device 10 has no power supply for supplying
power, another component different from the voltage detector in the
PoE device 10 cannot work. Therefore, the first voltage detector
continuously probes whether the first PoE port is connected to
power sourcing equipment.
[0120] If the PoE device 10 has a power supply for supplying power,
that is, in the foregoing second case in which the PoE device 10
has a power supply for supplying power, step 504 is performed, and
the first PoE port is changed to the PSE state. If the PoE device
10 has a power supply for supplying power, all components (the
first PSE chip, the first switching switch, the first controller,
and the like) in the PoE device 10 can work.
[0121] FIG. 4 is still used as an example. If the central AP 40 has
no power supply (adapter power supply or PoE) for supplying power,
and probes that the PoE ports 401 and 402 are not connected to
power sourcing equipment, the central AP 40 performs step 501 again
to continue to probe whether the PoE ports 401 and 402 are
connected to power sourcing equipment. If the central AP 40 has a
power supply for supplying power, the PSE chip 401-1 of the central
AP 40 can work. Therefore, the PoE port 401 may be changed to be
connected to the PSE chip 401-1 such that the PSE chip 401-1
detects whether the PoE port 401 is connected to a valid PD.
Similarly, the PSE chip 402-1 can also work, and the PoE port 402
may be changed to be connected to the PSE chip 402-1 such that the
PSE chip 402-1 detects whether the PoE port 402 is connected to a
valid PD.
[0122] Step 504: Connect the first PoE port and a first PSE
chip.
[0123] Step 505: Detect whether the first PoE port is connected to
a valid PD.
[0124] If the PoE device 10 has a power supply for supplying power,
the PoE device 10 (the first PSE chip) may detect whether the first
PoE port is connected to a valid PD.
[0125] If it is detected that the first PoE port is connected to a
valid PD, step 506 is performed.
[0126] If it is detected that the first PoE port is not connected
to a valid PD, step 507 is performed to change the first PoE port
to the PD state. If the switching period is set, detection is
performed for a plurality of times according to the switching
period, and changing is performed after the switching period
expires.
[0127] Step 506: Lock the first PoE port as a power sourcing
port.
[0128] After the PoE device 10 detects that the first PoE port is
connected to a valid PD, the PoE device 10 locks the first PoE port
as a power sourcing port in order to maintain that the first PoE
port is connected to the first PSE chip. Further, a lock mark may
be set, the first PoE port is locked as a power sourcing port, and
the state of the first PoE port is locked. If the switching period
is set, timing of the switching period may be further stopped.
[0129] Step 507: The PoE device 10 connects the first PoE port to
the first PD chip.
[0130] After connecting the first PoE port and the first PD chip,
the PoE device 10 performs step 501 again.
[0131] According to the port adaptation method provided in this
embodiment of the present disclosure, when the PoE device 10 is
interconnected with another device, the first PoE port may
adaptively serve as a power sourcing port or a power drawing port
according to the interconnected device without a need to manually
distinguish between ports to ensure accuracy of device
interconnection.
[0132] In the embodiments of the present disclosure, the PoE is
used as an example to describe how the PoE port in the PoE device
adaptively serves as a power sourcing port or a power drawing port.
The present disclosure is also applicable to a scenario in which a
similar power supply technology is used, for example, power over
data lines (PoDL). In the PoDL scenario, persons skilled in the art
may make adaptive modifications, variations, or replacements of
different protocols based on the embodiments of the present
disclosure, and these shall also fall within the protection scope
of the present disclosure.
[0133] Persons of ordinary skill in the art may understand that all
or a part of the steps of the method embodiments may be implemented
by a program instructing relevant hardware. The program may be
stored in a computer readable storage medium. The storage medium
may include a random access memory, a read-only memory, a flash
memory, a hard disk, a solid state disk, or an optical disc.
[0134] The foregoing descriptions are merely example
implementations of the present disclosure, but are not intended to
limit the protection scope of the present disclosure. Any variation
or replacement readily figured out by persons skilled in the art
within the technical scope disclosed in the present disclosure
shall fall within the protection scope of the present disclosure.
Therefore, the protection scope of the present disclosure shall be
subject to the protection scope of the claims.
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