U.S. patent application number 11/524204 was filed with the patent office on 2007-01-18 for mobile telecommunications system.
This patent application is currently assigned to NEC CORPORATION. Invention is credited to Gina Parmar, Robert Patterson.
Application Number | 20070015500 11/524204 |
Document ID | / |
Family ID | 10854453 |
Filed Date | 2007-01-18 |
United States Patent
Application |
20070015500 |
Kind Code |
A1 |
Parmar; Gina ; et
al. |
January 18, 2007 |
Mobile telecommunications system
Abstract
A method of processing a handover request from a base station
controller (BSC) of a GSM (Global System for Mobile
communication)-type network. The method comprises the steps of
passing a handover request with GSM-type parameters from a base
station controller (BSC) through a Master Switching Center (MSC) of
the GSM-type network to a UMTS core network (CN) and to a Radio
Network Controller (RNC) of the UMTS (Universal Mobile
Telecommunications System) network, translating the GSM-type
parameters to UTRAN parameters in the Radio Network Controller
(RNC), and allocating UTRAN resources in response to the translated
parameters.
Inventors: |
Parmar; Gina; (Surrey,
GB) ; Patterson; Robert; (Surrey, GB) |
Correspondence
Address: |
FOLEY AND LARDNER LLP;SUITE 500
3000 K STREET NW
WASHINGTON
DC
20007
US
|
Assignee: |
NEC CORPORATION
|
Family ID: |
10854453 |
Appl. No.: |
11/524204 |
Filed: |
September 21, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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|
10790674 |
Mar 3, 2004 |
|
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|
11524204 |
Sep 21, 2006 |
|
|
|
09578705 |
May 26, 2000 |
6725039 |
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10790674 |
Mar 3, 2004 |
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Current U.S.
Class: |
455/422.1 ;
455/427 |
Current CPC
Class: |
H04W 84/042 20130101;
H04W 36/0011 20130101; H04W 92/14 20130101; H04W 36/0033 20130101;
H04W 88/06 20130101; H04W 88/12 20130101; H04W 36/0061 20130101;
H04W 36/14 20130101; H04W 88/14 20130101; H04W 72/04 20130101; H04W
84/04 20130101; H04W 36/0066 20130101; H04W 28/18 20130101; H04W
76/10 20180201; H04L 69/08 20130101 |
Class at
Publication: |
455/422.1 ;
455/427 |
International
Class: |
H04Q 7/20 20060101
H04Q007/20 |
Foreign Application Data
Date |
Code |
Application Number |
May 28, 1999 |
GB |
9912604.7 |
Claims
1. A method of establishing Universal Mobile Telecommunications
System (UMTS) communication between User Equipment (UE) and a UMTS
network, wherein the User Equipment is in communication with a
Global System for Mobile communication (GSM)-type network, the
method comprising: forwarding UMTS Terrestrial Radio Access Network
(UTRAN) parameter information to the User Equipment via the
GSM-type network; and in the User Equipment, interpreting the UTRAN
parameter information and initiating communication with the UMTS
network.
2. A method according to claim 1, wherein the UTRAN parameter
information is supplied by a Radio Network Controller of the UMTS
network.
3. A method according to claim 1, wherein the UTRAN parameter
information comprises a list of potential UTRAN access points.
4. A method according to claim 1, wherein the UE is arranged to
establish a link through the Radio Network Controller (RNC) of the
UMTS network to the MSC of the GSM-type network.
5. A method according to claim 1, wherein potential links supplied
in a list to the UE on which satisfactory communication is not
possible are deleted from the list of available links.
6. A radio network controller of a UMTS network including means for
implementing a method according to claim 1.
7. User Equipment for a UMTS network arranged to communicate over
both a GSM network and said UMTS network, and comprising: means for
receiving UTRAN parameters for setting up a UMTS call from the GSM
network; and means for initiating communication with the UMTS
network based on said parameters to enable a GSM call to be handed
over to the UMTS network.
8. A message or data packet in a GSM network containing UTRAN
parameters for handing over a GSM call to a UMTS network addressed
to User Equipment engaged in a GSM call and capable of switching to
a UMTS call.
9. A radio network controller of a UMTS network including means for
implementing a method according to claim 2.
10. A radio network controller of a UMTS network including means
for implementing a method according to claim 3.
11. A radio network controller of a UMTS network including means
for implementing a method according to claim 4.
12. A radio network controller of a UMTS network including means
for implementing a method according to claim 5.
Description
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS
[0001] This application is a continuation of application Ser. No.
10/790,674, filed Mar. 3, 2004, now pending; which is a
continuation of application Ser. No. 09/578,705, filed May 26,
2000, now U.S. Pat. No. 6,725,039, issued Apr. 20, 2004, which
claims priority from British Patent Application No. 9912604.7,
filed May 28, 1999, by Gina Parmar and Robert Patterson, all of
which are incorporated herein by reference in their entirety. This
application claims only subject matter disclosed in the parent
application and therefore presents no new matter.
BACKGROUND OF THE INVENTION
[0002] The present invention relates to a mobile telecommunication
system and is particularly concerned with the handover of calls
between two types of communication systems, particularly handover
between a GSM and a UMTS network.
[0003] It has been generally proposed that it would be desirable to
provide handover between a GSM and a UMTS network. However, this is
not a straightforward task to accomplish and there are a number of
problems to implement before this can be successfully achieved; the
present invention is concerned with these problems. It is, however,
more generally applicable to interoperability between networks
using different protocols; in such a case, the terms used herein
are to be construed as applying to the relevant equivalent
components of the networks to which the invention is applied.
Although aspects of the invention provide independent solutions to
various aspects of the problems concerned with GSM and UMTS
handover, all are concerned with this common problem and in
particular are concerned with a novel solution in which an RNC of
the UMTS network controls handover to a large extent.
SUMMARY OF THE INVENTION
[0004] The invention is described in the context of GSM and UMTS
networks for ease of understanding, but is applicable to handover
between other networks with similar characteristics. Accordingly,
all references to GSM and UMTS and all terms of art used herein are
to be construed as encompassing equivalent features of other
networks. In particular, the present Japanese PDC network is of
similar architecture to GSM and the term GSM (or GSM-type) as used
in the specification and claims is intended to encompass such a
network. Similarly, the term UMTS (and related terms) is intended
to encompass a UMTS system in accordance with present standards and
proposals and any derivatives or equivalents thereof.
[0005] In a first aspect, the invention provides a method of
processing a handover request from a base station controller (BSC)
of a GSM network, the method comprising passing a handover request
with GSM parameters from a base station controller (BSC) through a
Master Switching Centre (MSC) of the GSM network to a UMTS core
network (C) and to a Radio Network Controller (RNC) of the UMTS
network; in the radio network controller, translating the GSM
parameters to UTRAN parameters; and allocating UTRAN resources in
response to the translated parameters. Thus, rather than
translating the GSM parameters on entry to the UMTS network, the
GSM parameters pass transparently through at least a portion of the
UMTS network to the RNC. The parameters may include one or more of
data rate, call type (voice, data, fax, other, e.g. video, IP),
Quality of Service etc. This reduces processing load elsewhere in
the network and enables the RNC to allocate the optimum UTRAN
resources for the call.
[0006] Preferably, the RNC is arranged to switch directly from a
GSM connection to a soft handover UMTS mode. This is advantageous
compared to simply establishing an individual connection from the
User Equipment (UE) to a single UMTS access node. This preferred
features may be provided independently in a second aspect in which
the invention provides a method of switching from a GSM network to
a UMTS network characterised by switching directly from a mode in
which User Equipment (UE) is in communication with a GSM base
station to a UMTS diversity mode in which the User Equipment is in
communication with a plurality of UMTS access nodes, preferably
comprising configuring the UTRAN so that a plurality of access
nodes are prepared to communicate with the UE and/or preferably
supplying a list of potential access nodes to the UE.
[0007] Preferably, the Radio Network Controller (RNC) is arranged,
following translation of the GSM format handover request firstly to
perform radio link setup and then, following a response from the
radio link, to perform data transport setup for communication
between the Radio Network Controller and the Core Network, This
allows communication with the Core Network to be established
following successful radio setup rather than independently, thus
avoiding unnecessary use of CN or RNC (Iu interface) resources if
radio link setup is not possible. This preferable feature may be
provided independently in a third aspect in which the invention
provides a method of establishing UMTS communication with User
Equipment following receipt by a Radio Network Controller of a GSM
handover request, the method comprising, in the Radio Network
Controller, setting up a radio link to a Node B and, following
acknowledgement of the radio link setup, in the Radio Network
Controller, setting up data transport between the Radio Network
Controller and the Core Network.
[0008] Preferably, the Radio Network Controller is arranged
(preferably following radio link setup) to pass a handover message
containing UTRAN parameters through the GSM network (for example as
a message), preferably through the Core Network to the GSM Master
Switching Centre and preferably at least through the Base Station
Controller of the GSM network, to the User Equipment; the method
further comprising interpreting the UTRAN parameters in the User
Equipment and, in response to the parameters, initiating
communication between the User Equipment and the UMTS network.
[0009] This may be provided independently in a fourth aspect in
which the invention provides a method of establishing UMTS
communication between User Equipment and a UMTS network, wherein
the User Equipment is in communication with a GSM network, the
method comprising forwarding UTRAN parameter information,
preferably comprising a list of potential UMTS Access Nodes via the
GSM network, preferably from a Radio Network Controller of the UMTS
network, to the User Equipment and, in the User Equipment,
interpreting the UTRAN parameter information and initiating
communication with the UMTS network.
[0010] Thus, in contrast to the initial step, where GSM information
tunnels into the UMTS network and is interpreted in the RNC, the
UTRAN information tunnels through the GSM network without
interpretation and is interpreted by the UE. This means that the
GSM network need not include intelligence to process the
information, simplifying interconnection with existing GSM
networks.
[0011] Following initiation of communication, preferably the UE is
arranged to establish a link through the RNC of the UMTS network to
the MSC of the GSM network (where the GSM call originated). This
then completes establishing a link from the MSC to the UE via the
UMTS network.
[0012] Preferably, potential links supplied in a list to the UE on
which satisfactory communication is not possible are deleted from
the list of available links; this step may be provided
independently in a method of performing soft handover from a GSM
network to a UMTS network comprising supplying a list of potential
UMTS access nodes to User Equipment; establishing communication
between the UE and at least one UMTS access node; and deleting
potential nodes with which satisfactory communication is not
possible from said list.
[0013] Preferably, at least during handover, the User Equipment
(UE) is arranged to communicate over both the GSM network an the
UMTS network simultaneously or quasi-simultaneously. This feature
may be provided independently in a fifth aspect in which the
invention provides a method of communicating between User Equipment
and GSM and UMTS networks comprising communicating information
simultaneously or quasi-simultaneously via both network during
handover from one network to the other.
[0014] All of the above aspects may be provided independently, but
are advantageously combined in a system. Thus, the invention may
provide a method of handing over a GSM call to a UMTS network
comprising passing a handover request from the GSM network
(preferably from a BSC, preferably containing GSM call parameters)
to a RNC of the UMTS network; interpreting the request in the RNC
and initiating call setup (preferably performing radio link setup
and preferably thereafter, in response to a successful setup,
performing data link to core network setup); forwarding handover
information containing UTRAN parameters (preferably including a
list of potential access nodes) to UE (preferably passing the UTRAN
information transparently through the GSM network, for example as a
message, to be interpreted by the UE); in the UE, setting up a UMTS
call based on the UTRAN parameters.
[0015] The invention extends to a radio network, or combination of
networks, radio network components, particularly RNCs and UEs all
adapted to implement any of the above method aspects and in
particular are concerned with a particular novel solution in which
an RNC of the UMTS network controls handover to a large extent.
[0016] The invention is described in the context of GSM and UMTS
networks for ease of understanding but is applicable to handover
between other networks with similar characteristics. Accordingly,
all references to GSM and MTS and all terms of art used herein are
to be construed as encompassing equivalent features of other
networks. In particular, the present Japanese PDC network is of
similar architecture to GSM and the term GSM (or GSM-type) as used
in the specification and claims is intended to encompass such a
network. Similarly, the term UMTS (and related terms) is intended
to encompass a UMTS system in accordance with present standards and
proposals and any derivatives or equivalents thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] An embodiment of the invention will now be described, with
reference to the accompanying drawing in which FIG. 1 depicts the
sequence of events between GSM to UMTS handover via a MAP/E
interface. This will also be applicable via the IWU.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0018] 1. The BSC sends Handover Required message to the GSM MSC.
This includes the GSM information elements (service information
rate, service type, etc.) and the UMTS cell/Node-B information on
which good radio quality is achievable.
[0019] 2. The GSM MSC sends MAP/E message Prepare Handover to the
UMTS CN forwarding the UMTS cell-ids transparently.
[0020] 3. The CN sends RANAP message Handover Request to the Target
RNC. This message will contain information elements indicating from
which network type this handover is taking place e.g.
"handover-type"="from GSM". It will also contain information
elements allowing transparent transfer of GSM Parameters to the
RNC, e.g. GSM Bearer Capability, version number and other relevant
parameters relating to the GSM call. Additionally, the relevant
UMTS cell/Node-B information provided by the MS-UE is also
transferred transparently to the RNC.
[0021] 4. The RNC maps GSM appropriate call parameters to the
relevant UMTS logical channel, transport channel and allocates
radio resource parameters as appropriate (e.g. DL channelization
code, UL spreading factor, UL scrambling code, Radio Frequency,
Radio Link ID, Link Reference, S-RNTI, Transport Format Sets,
Transport Format Combination Set, Initial DL Power). This function
can only be done at this state, since only the RNC knows the status
of the radio resources.
[0022] 5. Since dedicated transport channels are selected, the GSM
call can go into immediate soft-handover.
i) The RNC sends NBAP message Radio Link Setup to all relevant Node
Bs.
ii) All relevant Node Bs start transmission /reception.
iii) All relevant Node Bs send NBAP message Radio Link Setup
Response to the RNC.
[0023] 6. The RNC sets up Iub transport bearer to all relevant Node
Bs. The RNC is in a condition to set up the Transport Bearer across
Iub since it knows if the UTRAN resources have been setup
successfully.
[0024] 7. The RNC sets up Iu transport bearer. The RNC is in a
condition to set up the Transport Bearer across Iu since it knows
if the UTRAN resources have been set up successfully.
[0025] 8. The RNC sends Handover Request Acknowledge passing the
appropriate UMTS parameters to the CN (e.g. DL channelization code,
UL Spreading Factor, UL Scrambling Code, etc.) which are destined
for the UE allowing the successful handover of the UE to UMTS.
[0026] 9. The CN sends Prepare Handover Response to the GSM MSC
(forwarding the UMTS parameters).
[0027] 10. The GSM MSC sends Handover Command to the BSC
(forwarding the UMTS parameters).
[0028] 11. BSC sends the RR message Handover Command to the UE.
This contains the necessary UMTS parameters.
[0029] 12. The UE interprets the UMTS parameters within the RR
message and is able to switch the call from a GSM call into a UMTS
call with multiple or single diversity branches as indicated in the
UMTS parameters. At this sate, the mobile unit is receiving
information from the GSM network using its GSM capabilities and
uses this information to switch communication to the UMTS network
or simultaneously communicate with the UMTS network and GSM network
using its UMTS and GSM capabilities.
[0030] 13. The UE starts Tx/Rx.
[0031] 14. On detection of synchronization, the Node B sends NBAP
message Handover Detect to the RNC.
[0032] 15. If at least one of the Radio Links has been successfully
set up, then the RNC is able to establish the RLC link for the DTCH
and the RRC for the DCCH to the UE. The RNC is then able to signal
to the CN and onwards to the MSC that the handover is complete. The
MSN is able to switch the call through on the new UTRAN leg.
[0033] 16. In the case of having allocated multiple radio links on
the DL and if UL synchronization has not been detected, then the
appropriate signalling may take place between Node B and RNC to
release the unused radio resources.
[0034] It will be appreciated that the invention can be applied to
other network configurations. To assist in appreciating how the
invention may be extended, a glossary of terms used in the art
pertaining to UMTS systems is provided; any of the terms of art may
be replaced by functionally equivalent components in a non-UMTS
system. The following documents are incorporated herein by
reference;
[1] Draft ETR/SMG-50102. "Special Mobile Group (SMG) Vocabulary for
the Universal Mobile Telecommunications system".
[2] ETSI DTR/SMG-0225.times..times.U, "Universal Mobile
Telecommunications System (UMTS); Vocabulary for the UTRAN", UMTS
25..times..times. Version 0.1.0.
TERMS AND DEFINITIONS
Active Set
[0035] Set of radio links simultaneously involved in a specific
communication service between a UE and a UTRAN.
Cell
[0036] A cell is a geographical area that can be identified by a UE
from a (cell) identification that is broadcast from one UTRAN
Access Point.
Coded Composite Transport Channel (CCTrCH)
[0037] A data stream resulting from encoding and multiplexing of
one or several transport channels.
[0038] The data stream of the CCTrCH is fed to a data splitter unit
that splits the CCTrCH's data stream onto one or several Physical
Channel Data Streams.
Contention Resolution
[0039] A functionality or procedure to solve the collision of
identities on the initial random access messages from two (or more)
UEs.
Forward Handover
[0040] A type of handover initiated by the UE. The UE sends the
request for establishment of a new radio link in the new cell,
i.e., it does not use the current radio link for performing
handover but a radio link of the new cell.
Gateway UER/Seed
[0041] A ODMA relay node that also communicates with the UTRAN
using either TDD or FDD mode.
Handover
[0042] Handover is a family of procedures that adds or removes one
or several radio links between one UE and UTRAN when a RRC
connection exists and the position of the UE is known on cell level
in the UTRAN.
Hard Handover
[0043] Hard handover is a category of handover procedures where all
the old radio links in the UE are abandoned before the new radio
links are established.
Logical Channel
[0044] A logical channel is an information stream dedicated to the
transfer of a specific type of information over the radio
interface.
ODMA Relay Node
[0045] A relay device, such as a UER or Seed, that is capable of
relaying using the ODMA protocol.
Physical Channel
[0046] In FDD mode, a physical channel is defined by code,
frequency and, in the uplink, relative phase (I/O. In TDD, mode, a
physical channel is defined by code, frequency, and time-slot.
Physical channel data stream
[0047] In the uplink, a data stream that is transmitted on one
physical channel.
[0048] In the down link, a data stream that is transmitted on one
physical channel in each cell of the active set.
Radio Access Bearer
[0049] The service that the access stratum provides to the
non-access stratum for transfer of user data between UE and CN.
Radio Frame
[0050] Radio frame is a numbered time interval of 10 ms duration
used for data transmission on the radio physical channel. A radio
frame is divided into 16 time slots of 0.625 ms duration. The unit
of data that is mapped to a radio frame (10 ms time interval) may
also be referred to as radio frame.
Radio Link
[0051] The set of (radio) physical channels comprised in a
transmission path between a UE to one UTRAN access point.
Radio Link Addition
[0052] The procedure where a new radio ink is added to the active
set.
Radio Link Removal
[0053] The procedure where a radio link is removed from the active
set.
Radio Network Temporary Identifier (RNTI)
[0054] A Radio Network Temporary Identifier is an identifier for a
US when an RRC connection exists. It is e.g. used by the MAC
protocol on common Transport Channels (RACH, FACH, PCH).
Relay
[0055] A device capable of receiving and transmitting information
for another user.
Relaying
[0056] The process of receiving and transmitting information for
another user, such as carried out by a UER.
Relaylink
[0057] Relaylink is the communications line between two ODMA relay
nodes.
Root Relay
[0058] ODMA relay node where communications are either sourced or
sunk.
RRC Connection
[0059] A point-to-point bi-directional connection between RRC peer
entities on the UE and the UTRAN sides, respectively. An UE has
either zero or one RRC Connection.
Seed
[0060] A ODMA relay node which is deployed by a network operator
and is generally fixed, constantly powered, and has no
display/keypad.
Signalling Connection
[0061] An acknowledged-mode link between the user equpment and the
core network to transfer higher layer information beteween peer
entities in the non-access stratum.
Signaling Link
[0062] Provides an acknowledged-mode link layer to transfer the
UE-UTRAN signalling messages as well as UE-Core Network singalling
messages (using the signalling connection).
Soft Handover
[0063] Soft handover is a category of handover procedures where the
radio links are added and abandoned in such manner that the UE
always keeps at least one radio link to the UTRAN.
Transmission Time Interval
[0064] Transmission Time Interval is defined as the inter-arrival
time of Transport Block Sets, i.e., the time it should take to
transmit a Transport Block Set. It is always a multiple of 10 ms
(the length of one Radio Frame).
Transport Block
[0065] Transport Block is defined as the basic unit passed down to
L1 from MAC, for L1 processing. An equivalent term for Transport
Block is "MAC PDU".
Transport Block Set
[0066] Transport Block Set is defined as a set of Transport Blocks
which is passed to L1 from MAC at the same time instance using the
same transport channel. An equivalent term for Transport Block Set
is "MAC PDU Set".
Transport Block Set Size
[0067] Transport Block Set Size is defined as the number of bits in
a Transport Block Set.
Transport Block Size
[0068] Transport Block Size is defined as the size (number of bits)
of a Transport Block.
Transport Channel
[0069] The channels offered by the physical layer to Layer 2 for
data transport between peer L1 entities are denoted as Transport
Channels.
[0070] Different types of transport channels are defined by how and
with which characteristics data is transferred on the physical
layer, e.g., whether using dedicated or common physical channels
are employed.
Transport Format
[0071] A Transport Format is defined as a format offered by L1 to
MAC for the delivery of a Transport Block Set during a Transmission
Time Interval on a Transport Channel. The Transport Format
constitutes of two parts - one dynamic part and one semi-static
part.
Transport Format Combination
[0072] A Transport Format Combination is defined as the combination
of currently valid Transport Formats on all Transport Channels of a
UE, i.e., containing one Transport Format from each Transport
Channel.
Transport Format Combination Set
[0073] A Transport Format Combination Set is defined as a set of
Transport Format Combinations to be used by a UE.
Transport Format Combination Indicator (TFCI)
[0074] A Transport Format Combination Indicator is a representation
of the current Transport Format Combination.
Transport Format Indicator (TFI)
[0075] A label for a specific Transport Format within a Transport
Format Set.
Transport Format Set
[0076] A Transport Format Set is defined as the set of Transport
Formats associated to a Transport Channel.
URA Updating
[0077] URA updating is a family of procedures that updates the
UTRAN registration area of a UE when a RRC connection exists and
the position of the UE is known on URA level in the UTRAN.
User Equipment/Relay enabled (UE.sub.R)
[0078] A UE with ODMA relay operation enabled.
UTRAN Registration Area (URA)
[0079] The UTRAN Registration Area is an area covered by a number
of cells. The URA is only internally known in the UTRAN.
UTRAN Access Point
[0080] A conceptual point within the UTRAN performing radio
transmission and reception. A UTRAN access point is associated with
one specific cell, i.e., there exists one UTRAN access point for
each cell. It is the UTRAN-side end point of a radio link.
ABBREVIATIONS
ARQ Automatic Repeat Request
BCCH Broadcast Control Channel
BCH Broadcast Channel
BPSK Binary Phase Shift Keying
BSS Base Station System
BTS base Transceiver Station
C- Control-
CC Call Control
CCCH Common Control Channel
CCH Control Channel
CCTrCH Coded Composite Transport Channel
CDMA Code Division Multiple Access
CN Core Network
CRC Cyclic Redundancy Check
DC Dedicated Control (SAP)
DCA Dynamic Channel Allocation
DCCH Dedicated Control Channel
DCH Dedicated Channel
DHO Diversity Handover
DL Downlink
DRNC Drift Radio Network Controller
DS-CDMA Direct-Sequence Code Division Multiple Access
DSCH Downlink Shared Channel
DTCH Dedicated Traffic Channel
DTX Discontinuous Transmission
FACH Forward Link Access Channel
FAUSCH Fast Uplink Signalling Channel
FCS Frame Check Sequence
FDD Frequency Division Duplex
GC General Control (SAP)
HO Handover
HHO Hard Handover
ITU International Telecommunication Union
kbps kilo-bits per second
ksps kilo-symbols per second
L1 Layer 1 (physical layer)
L2 Layer 2 (data ink layer)
L3 Layer 3 (network layer)
LAC Link Access Control
MAC Medium Access Control
MM Mobility Management
Mcps Mega-ships per second
Mt Notification (SAP)
OCCCH ODMA Common Control Channel
ODCCH ODMA Dedicated Control Channel
ODCH ODMA Dedicated Channel
ODMA Opportunity Driven Multiple Access
ORACH ODMA Random Access Channel
ODTCH ODMA Dedicated Traffic Channel
PCCH Paging Conrol Channel
PCH Paging Channel
PDU Protocol Data Unit
PHY Physical Layer
PhyCHPhysical Channel
RACH Random Access Channel
RLC Radio Link Control
RNC Radio Network Controller
RNS Radio Network Subsystem
RNTI Radio Network Temporary Identity
RRC Radio Resource Control
SAP Service Access Point
SCCH Synchronization Control Channel
SCH Synchronization Channel
SDU Service Data Unit
SIR Signal-to-Interference Ratio
SRNC Serving Radio Network Controller
SRNS Serving Radio Network Subsystem
TCH Traffic Channel
TDD Time Division Duplex
TFCI Transport Format Combination Indicator
TFI Transport Format Indicator
TN Termination node
TPC Transmit Power Control
TRX Transmitter/Receiver
U- User-
UE User Equipment
UE.sub.R User Equipment with ODMA relay operation enabled
UL Uplink
UMTS Universal Mobile Telecommunciations System
URA UTRAN Registration Area
UTRA UMTS Terrestrial Radio Access
UTRAN UMTS Terrestrial Radio Access Network
* * * * *