WO2004045234A1 - Method for controlling a handover - Google Patents

Method for controlling a handover Download PDF

Info

Publication number
WO2004045234A1
WO2004045234A1 PCT/EP2003/012662 EP0312662W WO2004045234A1 WO 2004045234 A1 WO2004045234 A1 WO 2004045234A1 EP 0312662 W EP0312662 W EP 0312662W WO 2004045234 A1 WO2004045234 A1 WO 2004045234A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
sgsn
sbsc
handover
message
Prior art date
Application number
PCT/EP2003/012662
Other languages
French (fr)
Inventor
Christina Gessner
Toby Kier Proctor
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU2003301944A priority Critical patent/AU2003301944A1/en
Priority to BR0316199-4A priority patent/BR0316199A/en
Priority to EP03810985A priority patent/EP1561361A1/en
Publication of WO2004045234A1 publication Critical patent/WO2004045234A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the invention relates to a method for controlling a handover in radio communication systems.
  • radio communication systems signals are exchanged between radio terminals and base stations via a so called radio interface or air interface.
  • radio terminals are for example mobile or stationary user equipments (UE) .
  • base stations (NB - Node B) are access stations associ- ated with a land based communication network.
  • Examples of known radio communication systems are second generation digital mobile radio communication systems like GSM (Global System for Mobile Communication) based on TDMA (Time Division Multiple Access) and providing data rates up to 100 kbit/s, or third generation digital mobile radio communication systems like UMTS (Universal Mobile Telecommunication System) based on CDMA (Code Division Multiple Access) with data rates up to 2 Mbit/s.
  • GSM Global System for Mobile Communication
  • TDMA Time Division Multiple Access
  • CDMA Code Division Multiple Access
  • a context transfer or relocation between a source node and a target node should be employed. This relocation is inter alia mentioned in "Optimisation of SRNS relo- cation for real-time services" TSG-RAN WG #21, R2-011180, Bu- san, Korea, 21 st to 25 th May 2001, Agenda Item 9.2.3, Source Nokia.
  • Inter-RAT Radio Access Technologie
  • CS circuit switched domain services
  • Inter-RAT handover for PS (packet switched) domain services create additional problems for the transfer of an applied ROHC context in that the SGSN (Serving GPRS Support Node) and RNC (Radio Network Controller) do not possess a common protocol.
  • the SGSN Server GPRS Support Node
  • RNC Radio Network Controller
  • the hea- der compression is performed in the SNDCP in the SGSN
  • the header compression is performed in the PDCP (Packet Data Convergence Protocol) in the RNC.
  • PDCP Packet Data Convergence Protocol
  • An object of the invention is to provide a method for trans- ferring a protocol context during a handover procedure.
  • a first component transmits a handover request message to a second component.
  • the second component then transmits a message back to the first component, wherein the message contains information about a protocol context.
  • the first component transmits the handover request message inclu- ding the protocol context to the second component.
  • the inventive method makes an efficient use of existing message flows, thereby avoiding major changes to the systems ⁇ core network and RAN functionalities.
  • the invention is in ge- neral based on packet switched handover methods and message flows described in "Issues relating to PS Handover on an enhanced Gb", 3GPP GERAN Adhoc on A/Gb Evolution, Tdoc AHAGB- 006, Sweden, ll th -13 th June 2002, Source: Siemens.
  • the flow chart in the figure shows an example of a possible message exchange between various components of the radio com- munication system for a handover of a packet switched service.
  • the handover could for example be performed as a so called intrasyste handover within a GERAN based radio communication system, or as a so called intersystem handover from a GERAN based radio communication system to an UTRAN based radio communication system.
  • a similar flow chart could be defined for corresponding cell change procedures.
  • the SBSC Source Base Station Controller
  • MS Mobile Station
  • a message exchange procedure to handover the connection to respectively a TBSC (Target BSC) of the GERAN system or a RNC (Radio Network Controller) of an UTRAN system, in each case connected to a t-SGSN (Target-SGSN) .
  • the SBSC transmits a handover required message HO required to the s-SGSN (Source-SGSN) to which it is affiliated.
  • the s-SGSN replies to the received message by transmitting a HO reject message together with information related to the required ROHC context ROHC info.
  • This information is analysed in the SBSC and used to retransmit, in a third step (3) , the handover required message HO required to the s-SGSN, this time including the ROHC context ROHC info.
  • the s-SGSN subsequently forwards the handover request message HO required to the t-SGSN (tar- get-SGSN) of the target system, and the t-SGSN forwards it respectively to a TBSC (Target BSC) or to a RNC.
  • the TBSC or RNC then creates a new PDCP (Packet Data Convergence Protocol) for the handover, including the received new ROHC context ROHC info.
  • PDCP Packet Data Convergence Protocol
  • the described message flow is one in a variety of examples for an implementation of the method according to the invention, which, depending on the exact message flows to be deployed during a cell change or handover, could be modified accordingly.

Abstract

According to the inventive method for controlling a handover, a first component transmits a handover request message to a second component S-SGSN. The second component then transmits a message HO reject to the first component, wherein the message contains information relating to a protocol context ROHC. Finally, the first component retransmits the handover request message including the information relating to the protocol context to the second component.

Description

METHOD FOR CONTROLLING A HANDOVER
Field of the invention
The invention relates to a method for controlling a handover in radio communication systems.
Background of the invention
In radio communication systems, signals are exchanged between radio terminals and base stations via a so called radio interface or air interface. Such radio terminals are for example mobile or stationary user equipments (UE) . On the other side, base stations (NB - Node B) are access stations associ- ated with a land based communication network. Examples of known radio communication systems are second generation digital mobile radio communication systems like GSM (Global System for Mobile Communication) based on TDMA (Time Division Multiple Access) and providing data rates up to 100 kbit/s, or third generation digital mobile radio communication systems like UMTS (Universal Mobile Telecommunication System) based on CDMA (Code Division Multiple Access) with data rates up to 2 Mbit/s.
In such radio communication systems of the second and third generation, efficient header compression methods become increasingly important. Different methods are applicable and different protocol architectures are employed to make use of this feature. The so called robust header compression (ROHC) technique for an efficient transport of for example RTP (Real Time Protocol) /UDP (User Datagram Protocol) /IP packets over the radio interface is currently discussed for usage in SNDCP (Subnetwork Dependent Convergence Protocol) protocols of the enhanced Gb mode, i.e. in the context of GERAN (Global Evolution Radio Access Network - GSM/EDGE Radio Access Network) evolution towards the support of real time services. In this context, also requirements of such real time services, like for example streaming and conversational services with predefined time constraints, have to be taken into account. Any such header compression mechanism used therefore must also perform during for example handover or cell change.
In order to avoid a resource and time consuming re-initialisation of the header compression context following a handover or cell change, a context transfer or relocation between a source node and a target node should be employed. This relocation is inter alia mentioned in "Optimisation of SRNS relo- cation for real-time services" TSG-RAN WG #21, R2-011180, Bu- san, Korea, 21st to 25th May 2001, Agenda Item 9.2.3, Source Nokia.
The so called Inter-RAT (Radio Access Technologie) handover for CS (circuit switched) domain services is inter alia described in chapter 6.4.11 of the technical specification "In- terlayer procedures in Connected Mode" (Release 5) , 3GPP TS 25.303, V5.1.0 (2002-06) .
Inter-RAT handover for PS (packet switched) domain services create additional problems for the transfer of an applied ROHC context in that the SGSN (Serving GPRS Support Node) and RNC (Radio Network Controller) do not possess a common protocol. Specifically, in the GPRS protocol architecture the hea- der compression is performed in the SNDCP in the SGSN, whereas in the UTRAN protocol architecture the header compression is performed in the PDCP (Packet Data Convergence Protocol) in the RNC. Object' of the invention
An object of the invention is to provide a method for trans- ferring a protocol context during a handover procedure.
Statement of the invention
According to the inventive method for controlling a handover, a first component transmits a handover request message to a second component. The second component then transmits a message back to the first component, wherein the message contains information about a protocol context. Finally, the first component transmits the handover request message inclu- ding the protocol context to the second component.
The inventive method makes an efficient use of existing message flows, thereby avoiding major changes to the systems λ core network and RAN functionalities. The invention is in ge- neral based on packet switched handover methods and message flows described in "Issues relating to PS Handover on an enhanced Gb", 3GPP GERAN Adhoc on A/Gb Evolution, Tdoc AHAGB- 006, Stockholm, Sweden, llth-13th June 2002, Source: Siemens.
Brief description of the figures
The invention may be understood more readily, and various other aspects and features of the invention may become apparent from consideration of the following description and the figure as shown in the accompanying drawing sheet, wherein the figure shows a flow chart of a message exchange for handover. Detailed description of the invention
The flow chart in the figure shows an example of a possible message exchange between various components of the radio com- munication system for a handover of a packet switched service. The handover could for example be performed as a so called intrasyste handover within a GERAN based radio communication system, or as a so called intersystem handover from a GERAN based radio communication system to an UTRAN based radio communication system. A similar flow chart could be defined for corresponding cell change procedures.
In the given example, the SBSC (Source Base Station Controller) of the GERAN system, which has currently established a packet switched connection with a user equipment MS (Mobile Station) , initiates a message exchange procedure to handover the connection to respectively a TBSC (Target BSC) of the GERAN system or a RNC (Radio Network Controller) of an UTRAN system, in each case connected to a t-SGSN (Target-SGSN) .
In a first step (1), the SBSC transmits a handover required message HO required to the s-SGSN (Source-SGSN) to which it is affiliated. The s-SGSN then, in a second step (2), replies to the received message by transmitting a HO reject message together with information related to the required ROHC context ROHC info. This information is analysed in the SBSC and used to retransmit, in a third step (3) , the handover required message HO required to the s-SGSN, this time including the ROHC context ROHC info. The s-SGSN subsequently forwards the handover request message HO required to the t-SGSN (tar- get-SGSN) of the target system, and the t-SGSN forwards it respectively to a TBSC (Target BSC) or to a RNC. The TBSC or RNC then creates a new PDCP (Packet Data Convergence Protocol) for the handover, including the received new ROHC context ROHC info. Further exchanges of messages shown in the figure for executing and concluding the handover of the connection are well known from the art as aforesaid.
The described message flow is one in a variety of examples for an implementation of the method according to the invention, which, depending on the exact message flows to be deployed during a cell change or handover, could be modified accordingly.
The inventive method features inter alia the following advantages :
- An interworking of systems with different radio access technologies is ensured and header compression techniques are maintained in an efficient way;
- Additional header re-initialisation procedures in the target cell are avoided, thereby saving radio resources; - Well established message flows used for cell change or handover are reused;
- Only minor impacts on the core and radio network operation are required;
Transfer of the context remains transparent to the core network, which simplifies implementation of the procedure in the core network;
- No need to introduce new protocol entity (e.g. PDCP) for header compression in BSCs; and
- Method is easily applicable to other protocol contexts be- sides header compression.

Claims

Claims
1. Method for controlling a handover, wherein a first component (SBSC) transmits a handover request message (HO required) to a second component (s-SGSN), the second component (s-SGSN) transmits a message (HO reject) to the first component (SBSC) , wherein the message contains information relating to a protocol context (ROHC info) , and the first component (SBSC) retransmits the handover request message (HO required) including the information relating to the protocol context (ROHC info) to the second component (s- SGSN) .
2. Method according to claim 1, wherein the second component (s-SGSN) transmits a handover reject message (HO reject) to the first component (SBSC) .
3. Method according to claim 1 or 2, wherein the handover is executed for a packet switched service.
4. Method according to one of the previous claims, wherein the protocol context relates to a header compression.
5. Method according to one of the previous claims, wherein the first component (SBSC) and the second component (s-SGSN) relate to the same or different radio communication systems (GERAN, UTRAN) .
6. Radio communication system, comprising at least a first component (SBSC) with means for transmitting a handover request message (HO required) , and a second component (s-SGSN) with means for receiving the handover request message (HO required) from the first compo- nent (SBSC), and means for transmitting a message (HO reject) to the first component (SBSC) containing information relating to a protocol context (ROHC info) , wherein the first component (SBSC) comprises means for re- ceiving the message (HO reject) from the second component (s- SGSN) , and wherein the means for transmitting in the first component (SBSC) are used to retransmits the handover request message (HO required) to the second component (s-SGSN) including the received information relating to the protocol context (ROHC info) .
7. Component (SBSC) of a radio communication system, with means for transmitting a handover request message (HO required) to a second component (s-SGSN) , and, upon reception of a message (HO reject) from a second component (s-SGSN) containing information relating to a protocol context (ROHC info) using receiving means, for retransmitting the handover request message (HO required) to the second component (s- SGSN) including the received information relating to the pro- tocol context (ROHC info) .
PCT/EP2003/012662 2002-11-13 2003-11-12 Method for controlling a handover WO2004045234A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003301944A AU2003301944A1 (en) 2002-11-13 2003-11-12 Method for controlling a handover
BR0316199-4A BR0316199A (en) 2002-11-13 2003-11-12 Method of controlling a transfer
EP03810985A EP1561361A1 (en) 2002-11-13 2003-11-12 Method for controlling a handover

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0226453.9 2002-11-13
GBGB0226453.9A GB0226453D0 (en) 2002-11-13 2002-11-13 Method for controlling a handover

Publications (1)

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WO2004045234A1 true WO2004045234A1 (en) 2004-05-27

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EP (1) EP1561361A1 (en)
AU (1) AU2003301944A1 (en)
BR (1) BR0316199A (en)
GB (1) GB0226453D0 (en)
WO (1) WO2004045234A1 (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007078929A2 (en) * 2005-12-31 2007-07-12 Lucent Technologies Inc. Method for controlling header compression during a handoff in a wireless system
CN100370879C (en) * 2004-10-19 2008-02-20 华为技术有限公司 Performance statistical method for user controlled switching between WCDMA and GPRS systems
WO2007108655A3 (en) * 2006-03-22 2009-08-20 Lg Electronics Inc Method of supporting handover in a mobile communication system
US7826855B2 (en) 2006-01-05 2010-11-02 Lg Electronics, Inc. Data transmission method and data retransmission method
US7839829B2 (en) 2006-02-07 2010-11-23 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US7881724B2 (en) 2006-01-05 2011-02-01 Lg Electronics Inc. Allocating radio resources in mobile communications system
US7904055B2 (en) 2005-08-23 2011-03-08 Lg Electronics Inc. Communicating message in mobile communication system
US8068473B2 (en) 2006-02-07 2011-11-29 Lg Electronics Inc. Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof
US8072938B2 (en) 2006-01-05 2011-12-06 Lg Electronics, Inc. Method for handover in mobile communication system
US8112091B2 (en) 2006-01-05 2012-02-07 Lg Electronics Inc. Allocating radio resources in mobile communications system
US8135420B2 (en) 2006-01-05 2012-03-13 Lg Electronics Inc. Method of transmitting/receiving a paging message in a wireless communication system
US8189537B2 (en) 2006-06-21 2012-05-29 Lg Electronics Inc. Method for reconfiguring radio link in wireless communication system
US8223797B2 (en) 2007-08-10 2012-07-17 Huawei Technologies Co., Ltd. Method and system for setting up header compression communication, header compression policy function entity
US8234534B2 (en) 2006-06-21 2012-07-31 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US8243665B2 (en) 2006-02-07 2012-08-14 Lg Electronics Inc. Method for selection and signaling of downlink and uplink bandwidth in wireless networks
US8248924B2 (en) 2006-06-21 2012-08-21 Lg Electronics Inc. Uplink access method of mobile communication system
US8340026B2 (en) 2006-01-05 2012-12-25 Lg Electronics Inc. Transmitting data in a mobile communication system
US8396020B2 (en) 2006-01-05 2013-03-12 Lg Electronics Inc. Point-to-multipoint service communication
US8428086B2 (en) 2006-01-05 2013-04-23 Lg Electronics Inc. Transmitting data in a mobile communication system
US8493854B2 (en) 2006-02-07 2013-07-23 Lg Electronics Inc. Method for avoiding collision using identifier in mobile network
US8570956B2 (en) 2006-06-21 2013-10-29 Lg Electronics Inc. Method of communicating data in a wireless mobile communications system using message separation and mobile terminal for use with the same
US8638707B2 (en) 2006-06-21 2014-01-28 Lg Electronics Inc. Method for supporting quality of multimedia broadcast multicast service (MBMS) in mobile communications system and terminal thereof
US8750217B2 (en) 2006-01-05 2014-06-10 Lg Electronics Inc. Method for scheduling radio resources in mobile communication system
US9253801B2 (en) 2006-01-05 2016-02-02 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US9456455B2 (en) 2006-01-05 2016-09-27 Lg Electronics Inc. Method of transmitting feedback information in a wireless communication system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002056561A1 (en) * 2001-01-10 2002-07-18 Nokia Corporation Relocating context information in header compression

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002056561A1 (en) * 2001-01-10 2002-07-18 Nokia Corporation Relocating context information in header compression

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Impacts on supporting ROHC in SNDCP", 3GPP GERAN #11, TDOC GP-022484, 26 August 2002 (2002-08-26) - 31 August 2002 (2002-08-31), pages 1-4, XP002272378, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_geran/TSG_GERAN/GERAN_11_LosAngeles/Docs/GP-022484.zip> [retrieved on 20040304] *
ERICSSON: "PS Handover for A/Gb Mode-Basic Assumptions", 3GPP GERAN ADHOC ON A/GB EVOLUTION, TDOC AHAGB-016, 11 June 2002 (2002-06-11) - 13 June 2002 (2002-06-13), pages 1-4, XP002272379, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_geran/TSG_GERAN/AD-HOCs/A_Gb_Evolution/AHAGB-016.zip> [retrieved on 20040304] *
SIEMENS: "Introduction of ROHC for enhanced Gb", GERAN WG2 #11BIS, TDOC G2-020707, 7 October 2002 (2002-10-07) - 11 October 2002 (2002-10-11), pages 1-9, XP002272376, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_geran/Wg2_Protocol_Aspects/GERAN2_11bis_Atlanta/Docs/G2-020707.zip> [retrieved on 20040304] *
SIEMENS: "Issues relating to PS Handover on an enhanced Gb", 3GPP GERAN ADHOC ON A/GB EVOLUTION TDOC AHAGB-006, 11 June 2002 (2002-06-11) - 13 June 2002 (2002-06-13), pages 1-10, XP002272375, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_geran/TSG_GERAN/AD-HOCs/A_Gb_Evolution/AHAGB-006.zip> [retrieved on 20040304] *
SIEMENS: "ROHC context transfer in PS handover and Inter-RAT PS handover", TSG GERAN #12, TDOC GP-022972, 18 November 2002 (2002-11-18) - 22 November 2002 (2002-11-22), pages 22-11-1-7, XP002272377, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_geran/TSG_GERAN/GERAN_12_Sophia_Antipolis/Docs/GP-022972.zip> [retrieved on 20040304] *

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100370879C (en) * 2004-10-19 2008-02-20 华为技术有限公司 Performance statistical method for user controlled switching between WCDMA and GPRS systems
US7904055B2 (en) 2005-08-23 2011-03-08 Lg Electronics Inc. Communicating message in mobile communication system
WO2007078929A2 (en) * 2005-12-31 2007-07-12 Lucent Technologies Inc. Method for controlling header compression during a handoff in a wireless system
WO2007078929A3 (en) * 2005-12-31 2007-08-23 Lucent Technologies Inc Method for controlling header compression during a handoff in a wireless system
US9456455B2 (en) 2006-01-05 2016-09-27 Lg Electronics Inc. Method of transmitting feedback information in a wireless communication system
US8867449B2 (en) 2006-01-05 2014-10-21 Lg Electronics Inc. Transmitting data in a mobile communication system
US9397791B2 (en) 2006-01-05 2016-07-19 Lg Electronics Inc. Transmitting data in a mobile communication system
US9253801B2 (en) 2006-01-05 2016-02-02 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US7869396B2 (en) 2006-01-05 2011-01-11 Lg Electronics, Inc. Data transmission method and data re-transmission method
US7881724B2 (en) 2006-01-05 2011-02-01 Lg Electronics Inc. Allocating radio resources in mobile communications system
US9955507B2 (en) 2006-01-05 2018-04-24 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US9036596B2 (en) 2006-01-05 2015-05-19 Lg Electronics Inc. Transmitting data in a mobile communication system
US8072938B2 (en) 2006-01-05 2011-12-06 Lg Electronics, Inc. Method for handover in mobile communication system
US7826855B2 (en) 2006-01-05 2010-11-02 Lg Electronics, Inc. Data transmission method and data retransmission method
US8750217B2 (en) 2006-01-05 2014-06-10 Lg Electronics Inc. Method for scheduling radio resources in mobile communication system
US8112091B2 (en) 2006-01-05 2012-02-07 Lg Electronics Inc. Allocating radio resources in mobile communications system
US8135420B2 (en) 2006-01-05 2012-03-13 Lg Electronics Inc. Method of transmitting/receiving a paging message in a wireless communication system
US8165596B2 (en) 2006-01-05 2012-04-24 Lg Electronics Inc. Data transmission method and data re-transmission method
US8428086B2 (en) 2006-01-05 2013-04-23 Lg Electronics Inc. Transmitting data in a mobile communication system
US8396020B2 (en) 2006-01-05 2013-03-12 Lg Electronics Inc. Point-to-multipoint service communication
US8369865B2 (en) 2006-01-05 2013-02-05 Lg Electronics Inc. Data transmission method and data re-transmission method
USRE43949E1 (en) 2006-01-05 2013-01-29 Lg Electronics Inc. Allocating radio resources in mobile communications system
US8340026B2 (en) 2006-01-05 2012-12-25 Lg Electronics Inc. Transmitting data in a mobile communication system
US8243665B2 (en) 2006-02-07 2012-08-14 Lg Electronics Inc. Method for selection and signaling of downlink and uplink bandwidth in wireless networks
US7839829B2 (en) 2006-02-07 2010-11-23 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US10045381B2 (en) 2006-02-07 2018-08-07 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8068473B2 (en) 2006-02-07 2011-11-29 Lg Electronics Inc. Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof
US9706580B2 (en) 2006-02-07 2017-07-11 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8223713B2 (en) 2006-02-07 2012-07-17 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US9462576B2 (en) 2006-02-07 2016-10-04 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8406190B2 (en) 2006-02-07 2013-03-26 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8175052B2 (en) 2006-02-07 2012-05-08 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US7848308B2 (en) 2006-02-07 2010-12-07 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US8437335B2 (en) 2006-02-07 2013-05-07 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8451821B2 (en) 2006-02-07 2013-05-28 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8493854B2 (en) 2006-02-07 2013-07-23 Lg Electronics Inc. Method for avoiding collision using identifier in mobile network
US8238371B2 (en) 2006-02-07 2012-08-07 Lg Electronics Inc. Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof
US7843877B2 (en) 2006-02-07 2010-11-30 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US8085738B2 (en) 2006-02-07 2011-12-27 Lg Electronics Inc. Preamble retransmission method in mobile communications system
US8081660B2 (en) 2006-02-07 2011-12-20 Lg Electronics, Inc. Method for requesting radio resource in mobile communications system
US8971288B2 (en) 2006-03-22 2015-03-03 Lg Electronics Inc. Method of supporting handover in a wireless communication system
WO2007108655A3 (en) * 2006-03-22 2009-08-20 Lg Electronics Inc Method of supporting handover in a mobile communication system
US8570956B2 (en) 2006-06-21 2013-10-29 Lg Electronics Inc. Method of communicating data in a wireless mobile communications system using message separation and mobile terminal for use with the same
US9220093B2 (en) 2006-06-21 2015-12-22 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US8638707B2 (en) 2006-06-21 2014-01-28 Lg Electronics Inc. Method for supporting quality of multimedia broadcast multicast service (MBMS) in mobile communications system and terminal thereof
US8429478B2 (en) 2006-06-21 2013-04-23 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US8189537B2 (en) 2006-06-21 2012-05-29 Lg Electronics Inc. Method for reconfiguring radio link in wireless communication system
US8234534B2 (en) 2006-06-21 2012-07-31 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US8248924B2 (en) 2006-06-21 2012-08-21 Lg Electronics Inc. Uplink access method of mobile communication system
US8223797B2 (en) 2007-08-10 2012-07-17 Huawei Technologies Co., Ltd. Method and system for setting up header compression communication, header compression policy function entity

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