WO2009079854A1 - Procédé et dispositif pour identifier des tailles et sources de plusieurs rlc pdu - Google Patents

Procédé et dispositif pour identifier des tailles et sources de plusieurs rlc pdu Download PDF

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Publication number
WO2009079854A1
WO2009079854A1 PCT/CN2007/003751 CN2007003751W WO2009079854A1 WO 2009079854 A1 WO2009079854 A1 WO 2009079854A1 CN 2007003751 W CN2007003751 W CN 2007003751W WO 2009079854 A1 WO2009079854 A1 WO 2009079854A1
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WO
WIPO (PCT)
Prior art keywords
logical channel
lcid
rlc pdu
rlc pdus
rlc
Prior art date
Application number
PCT/CN2007/003751
Other languages
English (en)
Chinese (zh)
Inventor
Tao Yang
Original Assignee
Alcatel Shanghai Bell Co., Ltd.
Alcatel Lucent
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 Alcatel Shanghai Bell Co., Ltd., Alcatel Lucent filed Critical Alcatel Shanghai Bell Co., Ltd.
Priority to PCT/CN2007/003751 priority Critical patent/WO2009079854A1/fr
Priority to CN200780102061.7A priority patent/CN101911630B/zh
Publication of WO2009079854A1 publication Critical patent/WO2009079854A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method and apparatus for identifying sources and sizes of multiple RLC PDUs (Radio Link Control Protocol Data Units) multiplexed in a MAC (Media Access Control) frame, Redundant LCID (Logical Channel ID) information in the header of the MAC frame can be avoided, thereby saving radio resources.
  • RLC PDUs Radio Link Control Protocol Data Units
  • MAC Media Access Control
  • Redundant LCID Logical Channel ID
  • RLC PDUs for the same and/or different logical channels are multiplexed in the MAC layer.
  • size of the RLC PDU is variable in LTE. Therefore, the strategy used must ensure that:
  • the -Rx MAC layer correctly sends each extracted RLC PDU to its associated RLC entity.
  • the Rx MAC layer must know the source and length (size) information of each RLC PDU unambiguously.
  • an LCID Logical Channel ID
  • a specific field LI length indication
  • the LTE MAC layer has the following user plane principles:
  • Another decision related to LTE is that the size of the RLC PDU is not fixed but variable.
  • the Tx (transmitter) MAC layer must unambiguously indicate the source and size of each RLC PDU, so that the Rx MAC layer can:
  • Each RLC PDU is correctly sent to its associated RLC entity based on the source information.
  • Traditional solutions from companies such as Ericsson and Samsung are shown in Figure 1.
  • LCID1 ⁇ m are logical channel IDs for logical channels 1 ⁇ m;
  • LI1_1 ⁇ n1 are length information of the n1th RLC PDU from logical channel 1;
  • LI2_1 ⁇ n2 are length information of the n2th RLC PDU from logical channel 2;
  • Llm_1 ⁇ nm is the length information of the nmth RLC PDU from the logical channel m. As shown in Figure 1, the LCID and LI pairs are used for each RLC PDU.
  • An extension bit (E) is used after each LCID and LI pair for the following purposes:
  • E l , indicating that the next information is the LCID and LI pair for other RLC PDUs;
  • Figure 1 shows that the operation of Figure 1 is feasible because the Rx MAC layer correctly knows the source and length of each RLC PDU. However, Figure 1 also shows that there is a large amount of redundant LCID information in the MAC header, which causes a large amount of header consumption, resulting in wasted radio resources. Summary of the invention
  • the present invention has been proposed. It is an object of the present invention to provide a method and apparatus for identifying the source and size of a plurality of RLC PDUs multiplexed in a MAC frame, which can avoid redundant LCID information in the header of the MAC frame, thereby saving radio resources.
  • a method for identifying a source and a size of a plurality of radio link control-protocol data units RLC PDUs multiplexed in a medium access control MAC frame wherein the size of the RLC PDU is determined by The length indication LI field is indicated, the method comprising: identifying RLC PDUs for the same logical channel by setting only one logical channel identifier LCID; and using two extension bits to distinguish the source for each RLC PDU.
  • the two extension bits include a first extension bit E1 and a second extension bit E2.
  • E1 when E1 takes one of two possible values 0 and 1, it means that the next information is the LI field of the RLC PDU for the same logical channel; when E1 takes two possible values 0 and 1, On the other hand, it means that the next bit is the second extension bit E2.
  • E2 when E2 takes one of two possible values 0 and 1, it means that the next information is the LCID of the RLC PDU for another logical channel; when E2 takes the value of two possible values 0 and 1.
  • the method is applied to a wireless communication system.
  • the wireless communication system is a long term evolution LTE communication system.
  • an apparatus for identifying a source and a size of a plurality of radio link control-protocol data units RLC PDUs multiplexed in a medium access control MAC frame wherein the size of the RLC PDU is indicated by a length LI field
  • the device comprises: means for identifying RLC PDUs for the same logical channel by setting only one logical channel identifier LCID; and means for distinguishing the source for each RLC PDU by using two extension bits.
  • FIG. 1 is a schematic diagram showing a conventional method for identifying a source and a size for a plurality of RLC PDUs
  • FIG. 2 is a diagram showing source and size for identifying a plurality of RLC PDUs according to an embodiment of the present invention. Schematic diagram of the method
  • FIG. 3 is a diagram showing the operational flow of a method in accordance with one embodiment of the present invention. detailed description
  • Only one LCID is used for all RLC PDUs from the same logical channel to reduce header consumption.
  • extension bits (E1 and E2) are used for the following purposes:
  • FIG. 2 is a schematic diagram showing a method for identifying a source and a size for a plurality of RLC PDUs, in accordance with one embodiment of the present invention.
  • the LCID and LI shown in Fig. 2 have the same meanings as in Fig. 1.
  • the process of the Tx MAC layer is as follows:
  • Only one LCID is used for all RLC PDUs from the same logical channel.
  • the next is the LI field of the first RLC PDU from the logical channel, and the next field is the E1 bit.
  • the field after the E2 bit is the LCID for another logical channel, and the same process is performed.
  • the next field after E2 is other MAC information for other MAC frames.
  • the Rx MAC layer After detecting the LCID, the Rx MAC layer thus knows that the next field is for the LI field of the first RLC PDU from the logical channel, and the 1 bit after the LI field is the E1 bit.
  • the Rx MAC layer knows that the next field is the LI field for other RLC PDUs from that logical channel.
  • the Rx MAC knows that the next bit is the E2 bit.
  • the Rx MAC layer knows that the next field is the LCID for the other logical channel and performs the same process.
  • FIG. 3 is a diagram showing the operational flow of a method in accordance with one embodiment of the present invention.
  • step 301 RLC PDUs for the same logical channel are identified by setting only one LCID.
  • step 303 two extension bits are utilized to distinguish the source for each RLC PDU. Thereby, the source and size of a plurality of RLC PDUs multiplexed in the MAC frame can be identified in a cost-saving manner.
  • the invention is not limited to the above examples.
  • E1 taken from two possible values 0 and 1 can be swapped to achieve the same effect.
  • E2 the value of E1 taken from two possible values 0 and 1 can be swapped to achieve the same effect.
  • E2 the value of E1 taken from two possible values 0 and 1 can be swapped to achieve the same effect.
  • E2 the value of E1 taken from two possible values 0 and 1 can be swapped to achieve the same effect.
  • E2 the value of E1 taken from two possible values 0 and 1 can be swapped to achieve the same effect.
  • E2 the value of E1 taken from two possible values 0 and 1 can be swapped to achieve the same effect.
  • E2 only one LCID field is used for all RLC PDUs from the same logical channel, and the redundant LCID field is deleted. Therefore, the MAC header consumption is reduced and radio resources are saved. Two extension bits ensure that the MAC layer works unambiguously.
  • the present invention uses only one LCID field for all RLC PDUs from the same logical channel, and deletes redundant LCID information.
  • Two extension bits, El, E2 are proposed to ensure that the Rx MAC layer works correctly.
  • MAC header consumption is reduced, and thus radio resources are saved. For example, assume that N logical channels with Ni RLC PDUs are multiplexed into MAC PDUs, respectively. A total of [(N,. - l) x C/D - 1] bits are saved compared to the conventional method. Here, the length of the LCID field is indicated.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé pour identifier les tailles et les sources de plusieurs unités de données de protocole de commande de liaison radio (RLC PDU) qui sont multiplexées dans une trame de commande d'accès au support (MAC), la taille de chaque RLC PDU étant indiquée par un champ d'indication de longueur (LI). Le procédé comprend : l'identification des RLC PDU correspondant au même canal logique par réglage d'une seule identification de canal logique (LCID) et la distinction des sources correspondant à des RLC PDU différentes à l'aide de deux bits étendus.
PCT/CN2007/003751 2007-12-24 2007-12-24 Procédé et dispositif pour identifier des tailles et sources de plusieurs rlc pdu WO2009079854A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2007/003751 WO2009079854A1 (fr) 2007-12-24 2007-12-24 Procédé et dispositif pour identifier des tailles et sources de plusieurs rlc pdu
CN200780102061.7A CN101911630B (zh) 2007-12-24 2007-12-24 识别多个rlc pdu的源和大小的方法和设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/003751 WO2009079854A1 (fr) 2007-12-24 2007-12-24 Procédé et dispositif pour identifier des tailles et sources de plusieurs rlc pdu

Publications (1)

Publication Number Publication Date
WO2009079854A1 true WO2009079854A1 (fr) 2009-07-02

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Country Status (2)

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CN (1) CN101911630B (fr)
WO (1) WO2009079854A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11050665B2 (en) 2017-01-20 2021-06-29 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Data transmission method, apparatus, transmitting end, receiving end and system
RU2762931C2 (ru) * 2017-08-04 2021-12-24 Гуандун Оппо Мобайл Телекоммьюникейшнс Корп., Лтд. Способ поддержки дублирования данных, передающее оконечное устройство и приемное оконечное устройство

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3614726B1 (fr) 2017-08-11 2021-09-01 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé de transmission de données, et produit associé
CN109644373B (zh) * 2017-08-11 2021-04-27 Oppo广东移动通信有限公司 数据传输方法及相关产品
WO2019028866A1 (fr) 2017-08-11 2019-02-14 Oppo广东移动通信有限公司 Procédé de transmission de données et produit associé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002103542A1 (fr) * 2001-06-19 2002-12-27 Harris Corporation Systeme et procede d'identification d'un port
CN1692567A (zh) * 2002-11-05 2005-11-02 Lg电子株式会社 处理用于在相同信道上传递的数据单元
WO2006118435A1 (fr) * 2005-05-04 2006-11-09 Samsung Electronics Co., Ltd. Procede et dispositif servant a emettre/recevoir des paquets de donnees au moyen d'un indicateur de longueurs predefinies dans un systeme de communication mobile
CN101043305A (zh) * 2006-03-24 2007-09-26 大唐移动通信设备有限公司 串接结构和串接方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043304A (zh) * 2006-03-22 2007-09-26 华为技术有限公司 长期演进网络的数据处理方法
CN101222416B (zh) * 2007-01-09 2011-09-21 中兴通讯股份有限公司 一种媒体接入控制层下行协议数据单元的实现方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002103542A1 (fr) * 2001-06-19 2002-12-27 Harris Corporation Systeme et procede d'identification d'un port
CN1692567A (zh) * 2002-11-05 2005-11-02 Lg电子株式会社 处理用于在相同信道上传递的数据单元
WO2006118435A1 (fr) * 2005-05-04 2006-11-09 Samsung Electronics Co., Ltd. Procede et dispositif servant a emettre/recevoir des paquets de donnees au moyen d'un indicateur de longueurs predefinies dans un systeme de communication mobile
CN101043305A (zh) * 2006-03-24 2007-09-26 大唐移动通信设备有限公司 串接结构和串接方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11050665B2 (en) 2017-01-20 2021-06-29 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Data transmission method, apparatus, transmitting end, receiving end and system
RU2762931C2 (ru) * 2017-08-04 2021-12-24 Гуандун Оппо Мобайл Телекоммьюникейшнс Корп., Лтд. Способ поддержки дублирования данных, передающее оконечное устройство и приемное оконечное устройство
US11284296B2 (en) 2017-08-04 2022-03-22 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method of supporting data replication, transmitting terminal device and receiving terminal device

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Publication number Publication date
CN101911630B (zh) 2013-03-13
CN101911630A (zh) 2010-12-08

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