U.S. patent application number 10/259846 was filed with the patent office on 2003-04-24 for apparatus, method and system for matching subscriber states in network in which public land mobile network and wired/wireless private network are interworked.
Invention is credited to Lee, Dong-Youl, Lee, Gui-Jung.
Application Number | 20030078047 10/259846 |
Document ID | / |
Family ID | 19714811 |
Filed Date | 2003-04-24 |
United States Patent
Application |
20030078047 |
Kind Code |
A1 |
Lee, Dong-Youl ; et
al. |
April 24, 2003 |
Apparatus, method and system for matching subscriber states in
network in which public land mobile network and wired/wireless
private network are interworked
Abstract
An apparatus, method and system for matching subscriber states
in network in which public land mobile network and wired/wireless
private network are interworked are disclosed. The system matches
subscriber state information of the public network to subscriber
state information of the private network by allowing the private
network to transmit state information of a mobile station toward
the public network, the mobile station being located in a public
and private cell area. The method includes the steps of a) allowing
the private network to check state of a mobile station located in a
public and private cell area and transmit the subscriber state
information associated with the mobile station toward the public
network; and b) allowing the public network to receive the
subscriber state information and update the state of the mobile
station in a visitor location register. The step a) is carried out
when the state of the mobile station is changed or when an incoming
signal from the public network is directed to the mobile station,
which is in a local-area call connection state.
Inventors: |
Lee, Dong-Youl; (Suwon-shi,
KR) ; Lee, Gui-Jung; (Yongin-shi, KR) |
Correspondence
Address: |
Robert E. Bushnell
Suite 300
1522 K Street, N.W.
Washington
DC
20005
US
|
Family ID: |
19714811 |
Appl. No.: |
10/259846 |
Filed: |
September 30, 2002 |
Current U.S.
Class: |
455/445 ;
455/433; 455/463 |
Current CPC
Class: |
H04W 76/20 20180201;
H04W 92/14 20130101; H04W 88/14 20130101; H04W 92/02 20130101; H04W
8/10 20130101; H04W 8/18 20130101; H04W 68/12 20130101; H04W 84/105
20130101; H04W 8/20 20130101 |
Class at
Publication: |
455/445 ;
455/433; 455/463 |
International
Class: |
H04Q 007/20 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 28, 2001 |
KR |
2001-60674 |
Claims
What is claimed is:
1. A method for matching subscriber state information of a public
land mobile network public land mobile network and subscriber state
information of a wired/wireless private network in a public and
private mobile communication system in which the public land mobile
network including at least one base station transceiver subsystem
forming a public cell area and the private network including at
least one base station transceiver subsystem forming a public and
private cell area are interworked, the public and private mobile
communication system providing one mobile station with public and
private mobile communication services, the method comprising the
steps of: allowing the private network to determine a state of a
mobile station located in a public and private cell area and
transmit the subscriber state information associated with the
mobile station toward the public network; and allowing the public
network to receive the subscriber state information and process a
call associated with the mobile station on the basis of the
subscriber state information.
2. The method as set forth in claim 1, wherein the step of allowing
the private network to determine the state of the mobile station
located in the public and private cell area and transmit the
subscriber state information associated with the mobile station
toward the public network, is carried out when an incoming signal
from the public network is directed to the mobile station.
3. The method as set forth in claim 1, wherein the step of allowing
the private network to determine the state of the mobile station
located in the public and private cell area and transmit the
subscriber state information associated with the mobile station
toward the public network, is carried out when state information of
the mobile station is changed.
4. The method as set forth in claim 1, wherein the step of allowing
the public network to receive the subscriber state information and
process the call associated with the mobile station on the basis of
the subscriber state information, allows the public network to
update state information of the mobile station for the public
network registered in a visitor location register in response to
the subscriber state information.
5. The method as set forth in claim 3, wherein the step of allowing
the public network to receive the subscriber state information and
process the call associated with the mobile station on the basis of
the subscriber state information, allows the public network to
update state information of the mobile station for the public
network registered in a visitor location register in response to
the subscriber state information.
6. A method for matching subscriber state information of a public
land mobile network and subscriber state information of a
wired/wireless private network in a public and private mobile
communication system interworked with the public land mobile
network including at least one mobile switching center, a plurality
of public-network base station controllers coupled to each mobile
switching center, and a plurality of public-network base station
transceiver subsystems forming a public cell area and being coupled
to each base station controller, the public and private mobile
communication system including a public and private communication
service apparatus coupled to one of the base station controllers,
and at least one private base station transceiver subsystem forming
a public and private cell area and being coupled to the public and
private communication service apparatus, the method comprising the
steps of: receiving an incoming call message directed to a mobile
station located within the public and private cell area from the
public-network base station controller; determining whether the
mobile station is currently coupled to a call associated with the
private network; and coupling the mobile station to an incoming
call from the public network when the mobile station is in an idle
state and generating a paging response message to transmitting it
to the public-network base station transceiver subsystem when the
mobile station is currently coupled to a call associated with the
private network.
7. A method for matching subscriber state information of a public
land mobile network and subscriber state information of a
wired/wireless private network in a public and private mobile
communication system interworked with the public land mobile
network including at least one mobile switching center, a plurality
of public-network base station controllers coupled to each mobile
switching center, and a plurality of public-network base station
transceiver subsystems forming a public cell area and being coupled
to each base station controller, the public and private mobile
communication system including a public and private communication
service apparatus coupled to one of the base station controllers,
and at least one private base station transceiver subsystem forming
a public and private cell area and being coupled to the public and
private communication service apparatus, the method comprising the
steps of: when a mobile station located within the public and
private cell area gives a response to a paging signal from the
private network, transmitting state information indicating a
private call connection state of the mobile station to the
public-network base station controller; and updating the state
information of the mobile station in a visitor location register
using the state information transmitted to the public-network base
station controller.
8. The method as set forth in claim 7, further comprising the steps
of: allowing the mobile station to transmit state information
indicating an idle state to the public-network base station
controller when a call between the mobile station and the private
network is terminated; and updating the state information of the
mobile station in the visitor location register using the state
information transmitted to the public-network base station
controller.
9. A public and private communication service apparatus interworked
with the public land mobile network including a plurality of mobile
stations, at least one mobile switching center, a plurality of
public-network base station controllers coupled to each mobile
switching center, and a plurality of public-network base station
transceiver subsystems forming a public cell area and being coupled
to each base station controller, the public and private
communication service apparatus being coupled to at least one
private base station transceiver subsystems forming a public and
private cell area, comprising: a network connection controller for
providing a network connection for private switching services when
a message for an incoming signal reception request directed to a
terminal located within the public and private cell area is a
private mobile communication service message, determining whether
the terminal is in an idle state or a private call connection state
when the message for the incoming signal reception request directed
to the terminal is a public mobile communication service message,
providing a network connection if the terminal is in the idle
state, and generating a paging response message to transmit it to
the public-network base station controller when the terminal is in
the private call connection state; and a communication path former
for forming a communication path corresponding to services
requested in a received service request message in response to a
control of the network connection controller.
10. A public and private communication service apparatus
interworked with the public land mobile network including a
plurality of mobile stations, at least one mobile switching center,
a plurality of public-network base station controllers coupled to
each mobile switching center, and a plurality of public-network
base station transceiver subsystems forming a public cell area and
being coupled to each base station controller, the public and
private communication service apparatus being coupled to at least
one private base station transceiver subsystem forming a public and
private cell area, comprising: a network connection controller for
providing a network connection for private switching services when
a message for private call service request is received from a
mobile station located within the public and private cell area, and
generating a message indicating a private call connection state of
the mobile station to transmit it to the public-network base
station controller; and a communication path former for forming a
communication path corresponding to services requested in a
received service request message in response to a control of the
network connection controller.
11. The public and private communication service apparatus as set
forth in claim 10, wherein the network connection controller
generates a message indicating that the mobile station is in the
idle state when a call service is terminated between the mobile
station and the private network, to transmit the message to the
public-network base station controller.
12. The public and private communication service apparatus as set
forth in claim 9, wherein the network connection controller
comprises: a main controller for performing an operation of
controlling a private base station transceiver subsystem for public
and private mobile communication services and an operation of
controlling the network connection on the basis of public and
private mobile communication services; a private location register
for communicating with the main controller and recording
information including subscriber state information registered for
the private mobile communication services; a routing table being
used to retrieve the state information, the routing table having
path information mapped to each received message; and a message
router for retrieving the routing table to designate a path of the
received message and generating a paging response message to
transmit it to a public-network base station controller when the
subscriber state information of the private location register
indicates the private call connection state.
13. The public and private communication service apparatus as set
forth in claim 10, wherein the network connection controller
comprises: a main controller for performing an operation of
controlling a private base station transceiver subsystem for public
and private mobile communication services and an operation of
controlling the network connection on the basis of public and
private mobile communication services; a private location register
for communicating with the main controller and recording
information including subscriber state information registered for
the private mobile communication services; a routing table being
used to retrieve the state information, the routing table having
path information mapped to each received message; and a message
router for retrieving the routing table to designate a path of the
received message and generating a corresponding message to transmit
it to a public-network base station controller when the subscriber
state information of the private location register is changed.
14. The public and private communication service apparatus as set
forth in claim 11, wherein the network connection controller
comprises: a main controller for performing an operation of
controlling a private base station transceiver subsystem for public
and private mobile communication services and an operation of
controlling the network connection on the basis of public and
private mobile communication services; a private location register
for communicating with the main controller and recording
information including subscriber state information registered for
the private mobile communication services; a routing table being
used to retrieve the state information, the routing table having
path information mapped to each received message; and a message
router for retrieving the routing table to designate a path of the
received message and generating a corresponding message to transmit
it to a public-network base station controller when the subscriber
state information of the private location register is changed.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application relates to a U.S. patent application which
is concurrently submitted to the U.S. Patent & Trademark Office
with this application, entitled APPARATUS, METHOD AND SYSTEM FOR
MATCHING SUBSCRIBER STATES IN NETWORK IN WHICH PUBLIC LAND MOBILE
NETWORK AND WIRED/WIRELESS PRIVATE NETWORK ARE INTER WORKED, and
claims all benefits accruing under 35 U.S.C. .sctn.119 from an
application entitled APPARATUS, METHOD AND SYSTEM FOR MATCHING
SUBSCRIBER STATES IN NETWORK IN WHICH PUBLIC LAND MOBILE NETWORK
AND WIRED/WIRELESS PRIVATE NETWORK ARE INTER WORKED earlier filed
in the Korean Industrial Property Office on Sep. 28, 2001 and there
duly assigned Ser. No. 2001-60674. Each of the above-cited
applications is incorporated herein by reference in its
entirety.
CLAIM OF PRIORITY
[0002] This application makes reference to, incorporates the same
herein, and claims all benefits accruing under 35 U.S.C. .sctn.119
from an application for APPARATUS, METHOD AND SYSTEM FOR MATCHING
SUBSCRIBER STATES IN NETWORK IN WHICH PUBLIC LAND MOBILE NETWORK
AND WIRED/WIRELESS PRIVATE NETWORK ARE INTERWORKED earlier filed in
the Korean Industrial Property Office on Sep. 28, 2001 and there
duly assigned Ser. No. 2001-60674.
BACKGROUND OF THE INVENTION
[0003] 1. Field of the Invention
[0004] The present invention relates to a mobile communication
system interworked with a PLMN (Public Land Mobile Network) and a
wired/wireless private network, and more particularly to an
apparatus, method and system for matching subscriber states of a
PLMN and subscriber states of a wired/wireless private network by
informing the PLMN of the subscriber states associated with the
wired/wireless private network in a mobile communication
system.
[0005] 2. Description of the Related Art
[0006] Because a public mobile communication network and a private
(or local area) mobile communication network are individually
implemented, it is difficult for the public and private networks to
be interworked with each other. In other words, a conventional
mobile communication system can provide either public mobile
communication services or private mobile communication services. A
subscriber of a mobile communication terminal registered in the
public network cannot use the private mobile communication
services. Similarly, a subscriber of a mobile communication
terminal registered in the private network cannot use the public
mobile communication services. Accordingly, a system, which can
provide the subscriber of one mobile communication terminal with
both the public and private mobile communication services, is
seriously needed.
[0007] Copending Korean Patent Application Ser. No. 2000-028172
entitled "SYSTEM AND METHOD FOR PROVIDING PUBLIC/PRIVATE MOBILE
COMMUNICATION SERVICE", filed in the Korean Industrial Property
Office on May 24, 2000 by Samsung Electronics Co., Ltd. is
disclosed as an example of a public and private mobile
communication system, which can provide one mobile communication
terminal with both public and private mobile communication
services.
[0008] Hereinafter, an MS is a mobile station being a mobile
communication terminal. An MSC, a BSC and a BTS denote a mobile
switching center, a base station controller and a base station
transceiver subsystem, respectively. A prefix "p" attached to "MS",
"MSC", "BSC" or "BTS" means "private". For convenience, the prefix
"p" is used to distinguish components of the private network from
components of the public network.
[0009] Copending Korean Patent Application Ser. No. 2000-060831
entitled "APPARATUS AND METHOD FOR PERFORMING PACKET DATA
COMMUNICATION IN LOCAL-AREA RADIO INTERNET", filed in the Korean
Industrial Property Office on Sep. 28, 2000 by Samsung Electronics
Co., Ltd. is disclosed as an example of enabling use of a
local-area radio internet by applying a wired/wireless mobile
communication system to a 3G (3.sup.rd generation) network.
[0010] As disclosed in Korean Patent Application Ser. No.
2000-060831, a paging signal is transmitted through a path of
"MSC.fwdarw.BSC.fwdarw.BTS- .fwdarw.MS" in a conventional PLMN
rather than an interworking service system in which the public and
private networks are interworked, and a paging response message
generated by the MS is transmitted through a path
of"M.fwdarw.BTS.fwdarw.BSC.fwdarw.MSC" as a reverse path of the
paging signal path.
[0011] On the other hand, a wired/wireless communication service
system disclosed in Korean Patent Application Ser. No. 2000-060831
transmits a paging signal through a path of
"MSC.fwdarw.BSC.fwdarw.pBSC.fwdarw.BTS.fw- darw.MS" and a paging
response message generated by the MS for the public and private
networks is transmitted through a path of
"MS.fwdarw.BTS.fwdarw.pBSC.fwdarw.BSC.fwdarw.MSC" as a reverse path
of the paging signal path. Here, the pBSC transparently transmits
the paging signal where it is the public-network paging signal and
therefore does not affect processing of incoming and outgoing
paging signals from and to the public network in a terminal, which
is located within a public and private cell area. Accordingly, the
private network is compatible with the public network. Further, the
BSC for the public network can be directly coupled to the BTS
without the use of the pBSC. Where the paging signal from the
private network is generated, the processing of the paging signal
is controlled within the private network.
[0012] When a local-area MS located within the public and private
cell area, communicates with another local-area terminal or another
terminal through a PBX (another local-area terminal coupled to the
PBX or another terminal coupled to a PSTN (Public Switched
Telephone Network), which can be coupled to an office line of the
PBX) in the wired/wireless mobile communication system, the public
network generates a paging signal because the public network
recognizes the fact that the corresponding terminal is in an idle
state rather than the fact that the corresponding terminal is
coupled to a local-area call, where the public network pages the
local-area MS. However, when the terminal is coupled to the
local-area call, it cannot give any response to the paging signal
from the public network. Accordingly, the public network does not
identify a current location of a corresponding MS and transmits a
second paging signal. There is a problem in that this causes radio
resources of the public network to be wasted and cannot enable a
caller to exactly recognize a state of a called party. Here, the
second paging signal means not only an increase of the number of
paging times but also expansion of a paging zone. In other words,
the number of BTSs within the paging zone when the second paging
signal is transmitted can be increased more than that within the
paging zone when a first paging signal is transmitted. Here, the
paging zone is previously prescribed. Further, the paging performed
in the public network can exceed a predetermined paging range
corresponding to the public and private networks.
SUMMARY OF THE INVENTION
[0013] Therefore, the present invention has been made in view of
the above and other problems, and it is an object of the present
invention to provide an apparatus, method and system for
transmitting state information of terminals located within a
private network to a public network in a mobile communication
system interworked with the public and private networks.
[0014] It is another object of the present invention to provide an
apparatus, method and system for matching subscriber state
information of a private network and subscriber state information
of a public network by transmitting state information of terminals
located within the private network to the public network in a
mobile communication system interworked with the public and private
networks.
[0015] It is another object of the present invention to provide an
apparatus, method and system for matching subscriber state
information of a private network and subscriber state information
of a public network by transmitting state information of terminals
located within the private network to the public network in a
mobile communication system interworked with the public and private
networks, when an incoming call from the public network is directed
to a local-area mobile station, which is coupled to a local-area
call.
[0016] It is yet another object of the present invention to provide
an apparatus, method and system for matching subscriber state
information of a private network and subscriber state information
of a public network by transmitting changed state information to
the public network, when state information of local-area mobile
stations is changed in a mobile communication system interworked
with the public and private networks.
[0017] In accordance with a first aspect of the present invention,
the above and other objects can be accomplished by the provision of
a mobile communication system interworked with a public land mobile
network and a wired/wireless private network, characterized in that
subscriber state information of the public network is matched to
subscriber state information of the private network by allowing the
private network to transmit state information of a mobile station
toward the public network, the mobile station being located in a
public and private cell area.
[0018] In accordance with a second aspect of the present invention,
there is provided a method for matching subscriber state
information of a public land mobile network and subscriber state
information of a wired/wireless private network in a mobile
communication system interworked with the public network and the
private network, including the steps of: a) allowing the private
network to check a state of a mobile station located in a public
and private cell area and transmit the subscriber state information
associated with the mobile station toward the public network; and
b) allowing the public network to receive the subscriber state
information and process a paging call signal associated with the
mobile station.
[0019] In accordance with a third aspect of the present invention,
there is provided a mobile communication system interworked with a
public land mobile network and a wired/wireless private network,
including: a first determiner for determining whether a call signal
from the public network directed to a local-area mobile station of
the private network is generated; a second determiner for
determining whether the local-area mobile station communicates with
another local-area terminal; and a paging response message
generator for generating a paging response message instead of the
local-area mobile station and transmitting the paging response
message to the public network if the call signal from the public
network directed to the local-area mobile station of the private
network. is generated and a local area mobile station communicates
with other local-area terminals.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] A more complete appreciation of the invention, and many of
the attendant advantages thereof, will be readily apparent as the
same becomes better understood by reference to the following
detailed description when considered in conjunction with the
accompanying drawings in which like reference symbols indicate the
same or similar components, wherein:
[0021] FIG. 1 is a view illustrating a configuration and its
communication path associated with a public and private mobile
communication system in which the present invention can be
applied;
[0022] FIG. 2 is an exemplary view illustrating a configuration of
a public and private communication service apparatus associated
with a public and private mobile communication system in which the
present invention can be applied;
[0023] FIG. 3 is another exemplary view illustrating a
configuration of a public and private communication service
apparatus associated with a public and private mobile communication
system in which the present invention can be applied;
[0024] FIG. 4 is a flow chart illustrating a method for processing
a paging call signal from a public network in a public and private
communication service apparatus associated with a public and
private mobile communication system in which the present invention
can be applied;
[0025] FIG. 5 is another exemplary view illustrating a
configuration of a public and private communication service
apparatus associated with a public and private mobile communication
system in accordance with the present invention;
[0026] FIG. 6 is a view illustrating a structure of a table having
state information of MSs (Mobile Stations) included in a visitor
location register for a private network in accordance with the
present invention;
[0027] FIG. 7 is a view illustrating a format of a paging response
message in accordance with the present invention;
[0028] FIG. 8 is a flow chart illustrating a method for allowing a
private network to process a paging call signal from a public
network in accordance with the present invention;
[0029] FIG. 9 is a flow chart illustrating a method for allowing a
private network to transmit state information of a local-area MS
located within a public and private cell area to the public network
in accordance with the present invention;
[0030] FIG. 10 is a flow chart illustrating a method for
transmitting an MS state message to an MSC (Mobile Switching
Center) when the private network terminates an MS call in
accordance with the present invention;
[0031] FIG. 11 is a view illustrating a format of a new message,
which is made for matching subscriber states, in accordance with
the present invention;
[0032] FIG. 12 is a view illustrating a message in which sub-ID and
sub-type data are added to a pre-existing message for matching
subscriber states in accordance with the present invention; and
[0033] FIG. 13 is a view illustrating a message in which sub-ID and
sub-type data are added to a location registration message for
matching subscriber states in accordance with the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0034] A schematic configuration and a communication path of a
system shown in FIG. 1 will be described. FIG. 1 has certain
features related to the disclosure in Korean Patent Application
Ser. No. 2000-028172.
[0035] Referring to FIG. 1, a public and private communication
service apparatus 1012 is made up of a PBX (Private Branched
eXchange) 1030, a pBSC (private BSC) 1040 and a CM (Call Manager)
1050. The PBX 1030 includes a switch 1032 and an E1 (European
subscriber line, a type of a dedicated circuit for transmitting
data at a speed of 2.048 Mbps (Megabits per second) in a manner of
the wide area digital transmitting technique) interface 1034, and
the pBSC 1040 includes a pCIN (private Communication
Interconnection Network) 1042 and a TSB (Transcoder & Selector
Bank) 1044.
[0036] It should be understood that only internal configurations of
the PBX 1030 and the pBSC 1040 as components necessary for
explaining a communication path when the public and private mobile
communication services are provided are shown in FIG. 1 and other
components are omitted in FIG. 1. It is assumed that MSs 24 and 25
are registered in the public and private communication service
apparatus 1012 so that the MSs 24 and 25 are located within a
public and private cell area and can use the private mobile
communication services. Further, it is assumed that an MS 22 is
located within a public cell area. Under these assumptions, a
communication path (that is, a traffic channel) 10 made up of the
MS 24, a pBTS 8-k', the pCIN 1042 of the pBSC 1040, the TSB 1044,
an E1 interface 1034, the switch 1032, the TSB 1044, the pCIN 1042,
the pBTS 8-k' and the MS 25, and a reverse communication path of
the communication path 10 are examples of the case where the
private mobile communication services are provided. Further, a
communication path (that is, a traffic channel) 20 made up of the
MS 25, the pBTS 8-k', the pCIN 1042 of the pBSC 1040, a BSC 4-m' of
a PLMN 1001, an MSC 2-1', the BSC 4-m', the BTS 8-1' and the MS 22,
and a reverse communication path of the communication path 20 are
examples of the case where the public mobile communication services
are provided. The CM 1050 being a main controller of the public and
private communication service apparatus 1012 controls the formation
of the communication paths for the mobile communication services.
The public and private communication service apparatus 1012
provides wired communication services, IP (Internet Protocol)
terminal communication services and the public and private mobile
communication services. The PBX 1030 supports the wired
communication services and a gatekeeper (not shown) based on a VoIP
(Voice over Internet Protocol) supports the IP terminal
communication services. The CM 1050 controls the public and private
mobile communication services, that is, radio call services.
[0037] Now, preferred embodiments of the present invention will be
described in detail with reference to the annexed drawings. In the
drawings, the same or similar elements are denoted by the same
reference numerals even though they are depicted in different
drawings. In the following description made in conjunction with
preferred embodiments of the present invention, a variety of
specific elements such as concrete circuits are shown. The
description of such elements has been made only for a better
understanding of the present invention. Those skilled in the art
will appreciate that the present invention can be implemented
without using the above-mentioned specific elements. Also, in the
following description, a detailed description of known functions
and configurations incorporated herein will be omitted when it may
make the subject matter of the present invention rather
unclear.
[0038] FIG. 2 is an exemplary view illustrating a configuration of
a public and private communication service apparatus associated
with a public and private mobile communication system in which the
present invention can be applied.
[0039] In accordance with an embodiment of the present invention,
the public and private communication service apparatus 12 shown in
FIG. 1 provides wired communication services, IP (Internet
protocol) terminal communication services and public and private
mobile communication services. As shown in FIG. 2, a PBX 30
supports the wired communication services and a gatekeeper 94
supports the IP terminal communication services. A CM 50 controls
the public and private mobile communication services, that is,
radio call services.
[0040] The PBX 30, an INIA (IP Network Interface board Assembly
module) 46 included in a pBSC 40 and an LIM (LAN Interface Module)
68 included in the CM 50 are coupled to a LAN 90. The gatekeeper 94
is further coupled to the LAN 90. IP terminals such as a LAN-phone
92, a web-phone and a PC (Personal Computer) are coupled to the LAN
90.
[0041] The pBSC 40 performs a radio link control function, a
handoff function, etc. corresponding to a BSC included in a public
mobile communication system. A main controller of the pBSC 40 can
be embedded as a software module in the CM 50. The pBSC 40 includes
a pCIN 42. The pCIN 42 provides communication paths coupled to the
CM 50, a BSC 4-m included in a PLMN 1 and a pBTS 8-k, and a data
path among components included in the pBSC 40. In other words, the
pCIN 42 analyzes a message type, a caller address and a destination
address contained in a received message and then transmits a result
of the analysis to a corresponding device or processor. An E1 line
is coupled between the pCIN 42 and the BSC 4-m of the PLMN 1 and
between the pCIN 42 and the pBTS 8-k. A TSB 44 coupled to the pCIN
42 of the pBSC 40 is used to provide a mobile communication
subscriber for the private network with wireless communication
services. The TSB 44 performs a function of matching communication
data between the PBX 30 and the pBSC 40. The INIA 46 coupled to the
pCIN 42 of the pBSC 40 supports local-area radio data services. The
INIA 46 transmits a data packet to the LAN 90 using a PPP (Point to
Point Protocol) server and a TCP (Transmission Control
Protocol/Internet Protocol)/IP, wherein the data packet is received
from an MS located within a public and private cell area.
[0042] A VoIP module 36 located within the PBX 30 is coupled
between a switch 32 included in the PBX 30 and the LAN 90. The VoIP
module 36 provides VoIP services where the IP terminal such as the
LAN-phone 92 or etc. and a wired terminal (not shown) coupled to
the PBX 30 are interworked by the switch 32.
[0043] The CM 50 coupled to the pBSC 40 and the LAN 90 performs a
function of controlling a radio call for public and private mobile
communication services. At this time, call services for the MS in
the public network performs a control function so that a message
can be bypassed to the MSC for the public network. The CM 50
performs a function of administrating and maintaining radio
resources. However, an MSC1 2-1 for the public network performs
resource management for the pBTS 8-k and the CM 50 only refers to
the resource management performed by the MSC1 2-1. The CM 50
performs a function of loading a program in a processor for
controlling pBSC resources and a PLD (Program Loaded Data).
However, the loading for the pBTS 8-k is performed by a BSM (Base
Station Manager) (not shown). The CM 50 controls a wired and
wireless composite function. Further, the CM 50 supports a radio
SMS (Short Message Service) for the local area. Furthermore, the CM
50 supports a function of registering a subscriber in a private
mobile communication network and setting functions, and performs a
function of managing a VLR (Visitor Location Register) for use in
roaming of the MS registered in the private mobile communication
network.
[0044] In order to perform these functions, the CM 50 has software
modules including a DCI (Data Communication Interface) 52, a pBTMR
(pBTS Message Router) 54, a pBSC (private BSC) 56, a pMSC (private
Mobile Switching Center) 58, a PMIC (PBX Mobile Interface
Controller) 60, an SMC (Short Message service Controller) 62, a
pVLR (private VLR) 64, a WSM (Wireless System Manager) 66 and an
LIM (LAN Interface Module) 68. The DCI 52 is an interface module
for supporting communication between the pCIN 42 of the pBSC 40 and
the CM 50. The DCI 52 supports IPC (Inter Processor Communication)
through an HINA (High speed IPC Node board Assembly). The pBTMR 54
designates a path for all messages to be processed in the pBTS 8-k.
In more detail, the pBTMR 54 retrieves an internal router table,
designates a control (signal) message path for providing the MS
with incoming and outgoing call services (for the public and
private networks) and designates a message path for maintenance
services of the pBTS 8-k. Further, the pBTMR 54 communicates with
the pVLR 64. The pBSC 56 as the main controller of the pBSC 40
controls the pBTS 8-k. When the pMSC 58 supports the public and
private mobile communication services, it is located between the
pBSC 56 and the PMIC 60 and performs a function similar to a
function of the MSC included in a pre-existing public mobile
communication network. Further, in accordance with the embodiment
of the present invention, the pMSC 58 basically processes a
subscriber call, analyzes other supplementary services and
processes an interface with the PBX 30. In more detail, the pMSC 58
analyzes a service request from the subscriber, determines whether
either service for a pre-existing public mobile communication
network or service for the private mobile communication network
must be provided in response to the service request, and processes
a corresponding procedure based on a result of the determination.
An interface with the pBSC 56 is based on a procedure in the public
mobile communication network and uses an internal IPC. The PMIC 60
controls the wired and wireless composite function. The PMIC 60 is
located within the public and private cell area. The PMIC 60
controls a call between MSs, e.g., the MSs 24 and 25 shown in FIG.
1, and a wired terminal coupled to the PBX 30. The pMSC 58 is
different from a pre-existing MSC for the public network in that
the pMSC 58 cannot directly perform a switching function. The pMSC
58 as the software module does not include a switch. Thus, when the
private mobile communication services are provided, the public and
private communication service apparatus 12 uses the switch 32 of
the PBX 30. In accordance with the embodiment of the present
invention, the PMIC 60 generates an instruction necessary for
controlling the switch 32 of the PBX 30 in response to a switch
control request from the pMSC 58 and transmits the instruction to a
controller (not shown) included in the PBX 30. The controller of
PBX 30 performs the switching function in response to the
instruction. The SMC 62 controls the SMS and acts as an SMS web
server. The pVLR 64 manages subscriber information registered in
the private mobile communication services, location registration
information of a mobile communication subscriber for the private
network and other supplementary service information. The WSM 66
performs all the administration and maintenance functions of the
mobile communication services provided by the public and private
communication service apparatus 12. The WSM 66 is coupled to an
operator console (not shown) for interface with an operator. The
LIM 68 is a software module for communicating with the LAN 90. The
LIM 68 uses an OS (Operating System) to perform a communication
function through the PMIC 60, the SMC 62, the pVLR 64, the WSM 66
and the LAN 90.
[0045] The pBTS 8-k includes a PMCC (pBTS Main Controller Card) 80,
a PCC (pBTS Channel Card) 82, a TRIC (Transmit & Receive
Interface Card) 84 and a PRU (private BTS Radio Unit) 86. Since
components included in the pBTS 8-k and their functions are similar
to those included in the BTS of a conventional public mobile
communication system and their functions, a detailed description of
the pBTS 8-k will be omitted in this specification. The PMCC 80
performs an overall control of the pBTS 8-k, processes a signaling
message relating to call set-up and system performance, manages
hardware and software, and performs resource assignment. The PCC 82
processes base-band signals on the basis of a radio communication
standard. The TRIC 84 performs transmission and reception interface
between the PRU 86 and the PCC 82. The PRU 86 is an RF (Radio
Frequency) module. The PRU 86 is coupled to a plurality of antennas
ANT1-ANTn.
[0046] The public and private communication service apparatus 12
provides the wired services, the IP terminal services and the
public and private mobile communication services. Hereinafter, a
detailed description will be given of the public and private mobile
communication services performed by the public and private
communication service apparatus 12.
[0047] The public and private communication service apparatus 12
provides the MSs registered in the CM 50 with wired and wireless
composite function services as well as wireless communication
services. The wireless communication services include outgoing call
transmission services, incoming call reception services, call
transfer service, call forwarding services, local-area radio data
services and local-area radio SMS services. The wired and wireless
composite function services include a service for simultaneously
informing the wired terminal and a corresponding MS of an incoming
call when the communication service apparatus 12 receives the call
incoming into the wired terminal.
[0048] The term public and private mobile communication system
means that it can provide public and private mobile communication
services. Accordingly, all the messages incoming into the
communication service apparatus 12 are analyzed and a control
(signal) message corresponding to the public mobile communication
network is transmitted to the BSC for the public network and a
control (signal) message corresponding to the private mobile
communication network is routed to the modules within the CM 50.
The pBTMR 54 included in the CM 50 performs a routing function.
Where an outgoing call transmission event, an incoming call
reception event, a location registration event or an SMS service
event occurs, the pBTMR 54 analyzes a message corresponding to the
event and designates a routing path associated with the message.
The pBTMR 54 is equipped with a router table, which has routing
information mapped to each event. The message is transmitted to a
corresponding device and module using the router table.
[0049] FIG. 3 is another exemplary view illustrating a
configuration of a public and private communication service
apparatus 112 associated with a public and private mobile
communication system in which the present invention can be
applied.
[0050] As shown in FIG. 3, the public and private communication
service apparatus is made up of a BTS 200, a BSC.sub.PVT 500 (where
"PVT" stands for "private"), and an ATM (Asynchronous Transfer
Mode) network arranged between wireless public networks 300 and
400. The public and private communication service apparatus
transmits a signal packet, a voice compression packet and a data
packet.
[0051] The CM 50 acts as an independent server in FIG. 2. However,
a card instead of the independent server as the CM 50 is embedded
in the BSC.sub.PVT 500 in FIG. 3. Referring to FIG. 3, the card of
the CM 50 denotes "CM.sub.--1". The card CM_1 has software modules
including a pVLR 510, a pMSC 520, a pBSC 530, a pBTMR 540 and a
PMIC 560. The BSC.sub.PVT 500 includes a pBAN (private BSC ATM
Network) 550, a TCLA (Transcode Control and Link Board Assembly)
570, etc. coupled to a packet message path.
[0052] An MS 100 located in a local area (private) network can
receive and transmit call signals from and to the wireless public
networks 300 and 400 through the BTS 200. The VLR in the wireless
public network continuously updates a state of the MS 100 to a busy
state or an idle state. If a call signal is transmitted to an MSC
included in the wireless public network 400 from another MSC, an
HLR (Home Location Register) (not shown) queries a subscriber state
from the VLR. At this time, if the subscriber state is the idle
state, the call signal is routed from another MSC to the MSC
included in the wireless public network 400 so that paging is
performed.
[0053] A description will be given of a communication path in the
case where the call signal incoming into the public network is
received. The MSC included in the wireless public network 400
transmits a paging request message to a BSC 300 through ITU-T
(telecommunication standardization sector of the International
Telecommunication Union) signaling system No. 7. In response to the
paging request message, the BSC 300 transmits a general paging
message to the BTS 200 through the pBSC 530. The BTS 200 receives
the paging message through a paging channel. However, when an
incoming call is generated, the state of the MS 100 recorded in the
VLR is queried. The MSC included in the wireless public network 400
determines whether the MS 100 is in the busy state. If the MS 100
is in the busy state, the MSC 400 performs a process corresponding
to the busy state.
[0054] Hereinafter, a description will be given of a communication
path in the case where a local-area call is generated.
[0055] Where an incoming call is generated, the PBX 600 transmits a
paging request message to the pBSC 530. In response to the paging
request message, the pBSC 530 transmits a paging message to the BTS
200. In response to the paging message, the BTS 200 performs paging
through the paging channel.
[0056] On the other hand, where an outgoing call is generated, the
MS 100 transmits an outgoing call message to the pBSC 530 through
the BTS 200. In response to the outgoing call message, the pMSC 520
occupies an available channel of E1 channels coupled between the
pBSC 530 and the PBX 600. Thereafter, the pMSC 520 transmits an
assignment request message to the pBSC 530. In response to the
assignment request message, the pBSC 530 transmits a channel
assignment message to the BTS 200. Accordingly, a link set-up is
made between a vocoder (not shown) of the pBSC 530 and a channel of
the BTS 200. Thereafter, the MS 100 transmits a service connection
completion message to the pBSC 530. In response to the service
connection completion message, the pBSC 530 informs the pMSC 520
that the link set-up has been completed through the transmission of
the assignment completion message. In response to the assignment
completion message, the pMSC 520 transmits a call message to the
PBX 600 so that the PBX 600 can route the call message to a called
party.
[0057] The paging request message is transmitted from the BSC 300
to the BTS 200 through the pBSC 530. At this time, the pBSC 530
analyzes destination information contained in the paging request
message. If the destination information corresponds to a subscriber
located within the local area, it is determined whether the
subscriber is in a local-area call connection or busy state. If the
subscriber is in the call connection or busy state, the paging
request message can be rejected.
[0058] Up to now, the description of a public and private
communication service apparatus associated with a public and
private mobile communication system in which the present invention
can be applied has been provided only for a better understanding of
the present invention. Those skilled in the art will appreciate
that the present invention can be applied in another system and
device having components and communication paths similar to the
above-described embodiments.
[0059] Hereinafter, a detailed description will be given of the
present invention based on the public and private communication
service apparatus shown in FIG. 2 or 3. However, the preferred
embodiments of the present invention have been disclosed for
illustrative purposes, they are not intended to limit the scope of
the present invention. Those skilled in the art will appreciate
that the present invention can be applied in another system and
device having components and communication paths similar to the
above-described embodiments shown in FIG. 2 or 3.
[0060] FIG. 4 is a flow chart illustrating a method for processing
a paging call signal from a public network in a public and private
communication service apparatus associated with a public and
private mobile communication system shown in FIG. 2 or 3.
Hereinafter, the method will be described with reference to FIGS. 3
and 4.
[0061] The BSC 300 transmits a paging message to the BTS 200 in
order to page the MS 100 located in a cell area for the public and
private networks at step 3a. Then, the pBAN 550 transmits the
paging message to the pBTMR 540 at step 3b. In FIG. 2, the paging
message is transmitted to the pBTMR 540 through the pCIN 42.
Returning to FIG. 3, the pBTMR 540 transmits the paging message to
the BTS 200 at step 3c.
[0062] The BTS 200 transmits the paging message to the MS 100 at
step 3d. It is checked at step 3e whether a paging response message
has been received from the MS 100. If a paging response message has
been received from the MS 100, it is transmitted to the pBTMR 540
through the pBAN 550 at step 3f. The pBTMR 540 transmits the paging
response message to the BSC 300 for the public network through the
pBAN 550 at step 3g. Then, the BSC 300 performs a call process at
step 3h.
[0063] On the other hand, if a paging response message has not been
received from the MS 100, it is checked whether the number of
transmission times is greater than a predetermined number of
transmission times, e.g., 2. If the number of re-transmission times
is greater than a predetermined number of transmission times, the
BSC 300 proceeds to step 3j in order to terminate paging service.
Otherwise, the paging message is re-transmitted at the above step
3a.
[0064] In the case where the MS 100 has a problem or currently uses
the private network, the MS 100 cannot transmit the paging response
message. The latter case means that the MS 100 communicates with
another subscriber terminal 700 located in the local area of the
private network. Accordingly, although a paging signal (incoming
call signal) is generated from the public network, the MS 100
cannot transmit any response message because of being in the busy
state. At this time, because the public network recognizes that the
MS 100 is in the idle state rather than the busy state, the
wireless public network continuously transmits the paging signal
(incoming call signal) toward the MS 100. As described above, the
paging message can be transmitted twice. If the MS 100 is in the
busy state while the paging message is transmitted twice, the BSC
cannot help performing a non-response process because the MS 100
cannot give any response to the paging signal (incoming call
signal). In this case, because the public network cannot identify
the location of the MS 100 and transmits the paging signal twice,
radio resources of the public network cannot be effectively
managed.
[0065] FIG. 5 is another exemplary view illustrating a
configuration of a public and private communication service
apparatus 212 associated with a public and private mobile
communication system in accordance with the present invention.
[0066] An embodiment shown in FIG. 5 can be implemented in the
public and private communication service apparatus shown in FIG. 3.
The pMSC 520, the pBSC 530 and the PMIC 560 shown in FIG. 3 are
omitted in the embodiment shown in FIG. 5.
[0067] In accordance with the embodiment of the present invention,
a pBTMR 540 of the BSC.sub.PVT 502 of the public and private
communication service apparatus includes first and second
determiners 540a and 540b and a paging response message generator
540c. The first determiner 540a determines whether a call directed
from the public network to the MS 100 is generated. The second
determiner 540b determines whether the MS 100 is in a local-area
call connection state. If a call directed from the public network
to the MS 100 is generated and the MS 100 is in the local-area call
connection state, the paging response message generator 540c
generates a paging response message to transmit it to the public
network instead of the MS 100.
[0068] The second determiner 540b can determine whether the MS 100
is connected to the private network or in the local-area call
connection state, by retrieving a private call table 515 having
state information of the MS 100.
[0069] A description will be given of processes of transmitting
paging call signals from the public and private networks and
processes of generating paging response messages in response to the
paging call signals.
[0070] The process of transmitting the paging call signal from the
public network is based on a path of
"MSC.fwdarw.BSC.fwdarw.BSC.sub.PVT (pBTMR).fwdarw.BTS.fwdarw.MS".
The process of generating the paging response message is based on a
path of "MS.fwdarw.BTS.fwdarw.BSC.sub.PVT
(pBTMR).fwdarw.BSC.fwdarw.MSC". Here, the BSC.sub.PVT (pBTMR)
represents a software module for routing a message from the BTS
200.
[0071] The process of transmitting the paging call signal from the
private network is based on a path of "pMSC.fwdarw.BSC.sub.PVT
(pBTMR).fwdarw.BTS.fwdarw.MS". The process of generating the paging
response message is based on a path of
"MS.fwdarw.BTS.fwdarw.BSC.sub.PVT (pBTMR).fwdarw.pMSC".
[0072] FIG. 6 is a view illustrating a structure of a table having
state information of MSs included in a visitor location register
for a private network in accordance with the present invention.
[0073] The private call table includes an ESN (Electronic Serial
Number) of each MS, an MIN (Mobile Identification Number), an
extension number, a subscriber name, state information. The state
information indicates whether the MS uses the private network. The
state information is recorded or deleted by the pMSC 520. When the
MS receives a paging call signal from the private network, the
state information indicating that the MS currently uses the private
network is recorded. When the call signal is released, the recorded
state information is deleted.
[0074] When the paging response message is generated in response to
the paging call signal, the pBTMR 540 retrieves the state
information and then routes the paging response message. Further,
the pBTMR 540 retrieves the state information and performs routing
in response to the paging call signal from the public network. In
other words, if a corresponding terminal uses the private network,
the pBTMR 540 generates the paging response message instead of the
terminal and then transmits it to the public network.
[0075] FIG. 7 is a view illustrating a format of a paging response
message in accordance with the present invention.
[0076] As shown in FIG. 7, a message tag "sud_tag" indicates a type
of a message such as a PRM (Paging Response Message) or an RGM
(Registration Message). A mobile identification "mobile_id"
includes an ESN, an MIN and an IMSI (International Mobile
Subscriber Identity), etc. The IMSI is stored in an SIM (Subscriber
Identity Module) and used in authentication for system
connection.
[0077] FIG. 8 is a flow chart illustrating a method for allowing a
private network to process a paging call signal from a public
network in accordance with the present invention. The call process
performed by the private network is made up of four stages. The
method will be described with reference to FIGS. 5 and 8.
[0078] A first stage: It is determined whether the public network
generates the paging call signal directed to the MS 100.
[0079] The BSC 300 transmits a paging message to the BTS 200 in
order to page the MS 100 located in a public and private cell area
at step 13a.
[0080] A second stage: If the public network generates the paging
call signal directed to the MS 100 at the first stage, it is
checked on the basis of the private call table 515 shown in FIG. 6
whether the MS 100 currently uses the private network.
[0081] The pBAN 550 transmits the paging message to the pBTMR 540
at step 13b. The pBTMR 540 requests the pVLR 510 to analyze whether
the MS 100 currently uses a private network call at step 13c.
[0082] A third stage: If the MS 100 currently uses a private
network call at the second stage, the pBTMR 540 generates a paging
response message instead of the MS 100 as shown in FIG. 7 and then
transmits it to the public network.
[0083] If the MS 100 currently uses the private network call at
step 13d, the pBTMR 540 generates the paging response message
instead of the MS 100 as shown in FIG. 7 and then transmits it to
the BSC 300 of the public network through the pBAN 550 at step 13e.
The BSC 300 terminates the paging service at step 13f.
[0084] A fourth stage: If the MS 100 does not currently use the
private network call at the second stage, a following step is
performed. In other words, if the MS 100 does not currently use the
private network call at step 13d, the pBTMR 540 transmits the
paging message to the BTS 200 through the pBAN 550 at step 3g.
[0085] FIG. 9 is a flow chart illustrating a method for allowing a
private network to transmit state information of a local-area MS
located within a public and private cell area to the public network
in accordance with the present invention.
[0086] In FIG. 3, the process of transmitting the paging call
signal from the private network is based on a path of
"pMSC.fwdarw.BSC.sub.PVT (pBTMR).fwdarw.BTS.fwdarw.MS". The process
of generating the paging response message is based on a path of
"MS.fwdarw.BTS.fwdarw.BSC.sub.PVT (pBTMR).fwdarw.pMSC". Further,
the process of transmitting the state information of the local-area
MS in the private network is based on a path of "BSC.sub.PVT
(pBTMR).fwdarw.BSC.fwdarw.MSC". The above-described processes will
be described in detail with reference to FIG. 9.
[0087] It is assumed that the MS 100 is paged from another
subscriber terminal 700 in the local area. The state information of
the MS 100 is transmitted to the public network. This process is as
follows.
[0088] A first stage: If the PBX transmits a paging request message
in order to page the MS 100 located in a public and private cell
area, the pMSC 520 generates a paging message at step 5a. The pBSC
530 transmits the paging message to the BTS 200 at step 5b. The BTS
200 transmits the paging message to the MS 100 at step 5c.
[0089] A second stage: In response to the paging message, the MS
100 generates an acknowledgement message and then transmits it to
the BTS 200 at step 5d.
[0090] A third stage: The BTS 200 transmits the acknowledgement
message to the pBSC 530 through the pBAN 550 at steps 5e and 5f.
The pBSC 530 transmits the acknowledgement message to the pMSC 520
at step 5g. The pMSC 520 forms a communication path in response to
the acknowledgement message and then transmits a state message
indicating a state (e.g., busy state) of the MS 100 to the pBSC 530
at step 5h. The pBSC 530 transmits the state message to the BSC 300
for the public network through the pBAN 550 at step 5i. The BSC 300
transmits the state message to the MSC 400 at step 5j. The MSC 400
records the state (e.g., busy state) of the MS 100 in the VLR in
response to the state message at step 5k.
[0091] A fourth stage: If the acknowledgement message has not been
received at the third stage, a step relating to non-response is
performed. In other words, if the pMSC 520 has not received the
acknowledgement message at step 5e, the paging message is
re-transmitted the predetermined number of times (or for a
predetermined period of time) on the basis of steps 5l and 5m.
[0092] FIG. 10 is a flow chart illustrating a method for
transmitting an MS state message to an MSC when the private network
terminates an MS call in accordance with the present invention.
[0093] A first stage: The pMSC 520 generates a call termination
message relating to the MS 100 located in a public and private cell
area at step 6a.
[0094] A second stage: In response to the call termination message,
the pBSC 530 generates an MS state (e.g., idle state) message and
then transmits it to the BSC 300 for the public network through the
pBAN 550 at step 6b.
[0095] A third stage: The BSC 300 transmits the MS state message to
the MSC 400 at step 6c and then the MSC 400 records the state
(e.g., idle state) of the MS 100 in the VLR in response to the MS
state message at step 6d.
[0096] FIG. 11 is a view illustrating a format of a new message,
which is made for matching subscriber states, in accordance with
the present invention.
[0097] The new message includes message fields. The message fields
basically contain a 50-byte message header field, a 2-byte message
length field and a 4-byte message ID (identification) field.
Destination and source addresses are recorded in the message header
field. A length of a message is recorded in the message length
field. A type of a message is recorded in the message ID field.
[0098] The busy state "LOCAL_BUSY_MSG_TYPE" or the idle state
"LOCAL_IDLE_MSG_TYPE" can be recorded in the message ID field so
that the message is used for matching the subscriber states.
[0099] FIG. 12 is a view illustrating a message in which sub-ID and
sub-type data are added to a pre-existing message for matching
subscriber states in accordance with the present invention.
[0100] As compared with the message shown in FIG. 11, the message
shown in FIG. 12 further includes a message sub-ID field. The
message sub-ID field is of 4 bytes. The sub-type of the message is
recorded in the message sub-ID field.
[0101] The busy state "LOCAL_BUSY_MSG_TYPE" or the idle state
"LOCAL_IDLE_MSG_TYPE" can be recorded in the message sub-ID field
so that the message is used for matching the subscriber states.
[0102] FIG. 13 is a view illustrating a message in which sub-ID and
sub-type data are added to a location registration message for
matching subscriber states in accordance with the present
invention.
[0103] As compared with messages shown in FIGS. 11 and 12, the
location registration message shown in FIG. 13 further includes a
1-byte registration type field, a 1-byte slot cycle index field and
a terminal version field.
[0104] The busy state "LOCAL_BUSY_MSG_TYPE" or the idle state
"LOCAL_IDLE_MSG_TYPE" can be recorded in the registration type
field so that the location registration message is used for
matching the subscriber states. Further, a slot cycle index is
provided for indicating a cycle so that the terminal can search a
paging channel message for the cycle. For example, a slot cycle
index "0" indicates a cycle of 1.28 seconds. A slot cycle index "1"
indicates a cycle of 2.56 seconds. A slot cycle index "2" indicates
a cycle of 5.12 seconds. Terminal versions "1", "2" and "3" are
IS-95, IS-95-A (Telecommunication Industry Association
(TIA)/Electronic Industry Alliance (EIA) IS-95 and IS-95A) and TSB
44, respectively.
[0105] As apparent from the above description, the present
invention provides an apparatus, method and system, which can allow
a public network to recognize state information of a private
network subscriber located in a private and public cell area by
transmitting terminal state information from the private network to
the public network in a mobile communication system interworked
with the public and private networks. Accordingly, public and
private mobile communication services can be quickly and smoothly
provided. Further, the present invention can efficiently manage
radio resources by removing unnecessary paging, e.g., transmission
of a second paging call signal, or an error process based on a
paging non-response.
[0106] Although the preferred embodiments of the present invention
have been disclosed for illustrative purposes, they are not
intended to limit the scope of the present invention. Those skilled
in the art will appreciate that various modifications, additions
and substitutions are possible, without departing from the scope of
the invention. Therefore, the present invention is not limited to
the above-described embodiments, but the present invention is
defined by the claims which follow, along with their full scope of
equivalents.
* * * * *