WO2007045126A1 - Dispositif de commande du debit d’acces par paquet sur liaison descendante a grande vitesse - Google Patents

Dispositif de commande du debit d’acces par paquet sur liaison descendante a grande vitesse Download PDF

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Publication number
WO2007045126A1
WO2007045126A1 PCT/CN2005/001734 CN2005001734W WO2007045126A1 WO 2007045126 A1 WO2007045126 A1 WO 2007045126A1 CN 2005001734 W CN2005001734 W CN 2005001734W WO 2007045126 A1 WO2007045126 A1 WO 2007045126A1
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WO
WIPO (PCT)
Prior art keywords
data
radio link
link control
service
control
Prior art date
Application number
PCT/CN2005/001734
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English (en)
Chinese (zh)
Inventor
Focai Peng
Zhiyuan Xia
Hong Sheng
Zhuo Yang
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Priority to CN2005800496699A priority Critical patent/CN101167288B/zh
Priority to PCT/CN2005/001734 priority patent/WO2007045126A1/fr
Publication of WO2007045126A1 publication Critical patent/WO2007045126A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • 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
    • H04W28/10—Flow control between communication endpoints

Definitions

  • the invention relates to a flow control technology in a wideband code division multiple access (WCDMA-) mobile communication system, in particular to a flow control of a High Speed Downlink Package Access (HSDPA) in a WCDMA system.
  • WCDMA- wideband code division multiple access
  • HSDPA High Speed Downlink Package Access
  • the 3GPP Release 5 adds a Media Access Control-High Speed Downlink Packet Access Entity to the Base Station (Node B) (MAC-HSDPA; MAC-hs).
  • HSDPA's packet scheduler is implemented in MAC-hs.
  • the packet data scheduled by the HSDPA scheduler comes from the Media Access Control of the Radio Network Controller (RNC) - Private (MAC-d) or Media Access Control Entity - Public / Shared (MAC-c/sh).
  • the MAC-d/c/sh data comes from the RNC's Radio Link Control Sublayer (RLC), as shown in Figure 1.
  • RNC Radio Network Controller
  • RLC Radio Link Control Sublayer
  • the general procedure for flow control is that MAC-d (or MAC-c/sh) sends a flow control request (HS-DSCH CAPACITY REQUEST) to the MAC-hs based on its buffer status.
  • the MAC hs sends a certain format of the flow control allocation frame (HS-DSCH CAPACITY ALLOCATION) according to the flow control policy, or does not send the flow control allocation frame to let the RNC wait.
  • the MAC-d After receiving the flow control allocation frame, the MAC-d sends a corresponding packet data frame (HS-DSCH DATA FRAME) to the MAC-hs according to a certain policy.
  • the existing traffic control has not yet comprehensively considered the three factors of the RLC mode, the user service type, and the service HS-DSCH cell change, and the UE service is more effectively realized while ensuring the system capacity as high as possible. Continuous processing strategy.
  • the technical problem to be solved by the present invention is to provide a high-speed downlink packet access flow control device and method in a WCDMA system. While providing the WCDM system with the highest possible system capacity, it can ensure that HSDPA can maintain continuous coverage to achieve continuity of UE services.
  • the present invention provides the following solutions:
  • a flow control device for high-speed downlink packet access in a wideband code division multiple access system located at a base station medium access control layer-high speed sub-layer, comprising:
  • a radio link control layer mode data classification unit configured to distinguish a high speed downlink packet access data mode of the user equipment
  • a radio link control-acknowledgment mode data extracting unit configured to extract radio link control-acknowledgment mode data
  • a radio link control-non-acknowledgement mode data extracting unit configured to extract radio link control-non-confirmation mode data
  • Radio link control-non-acknowledge mode data service type prediction unit which is used to predict the type of service of the wireless link control-non-confirmation mode data
  • a service high speed downlink shared channel cell change prediction unit configured to predict a service high speed downlink shared channel cell change of the user equipment
  • a flow control capability allocation frame data generating unit configured to generate a flow control capability allocation frame;
  • the radio link control layer mode data classification unit obtains data from the Iub interface, and after distinguishing the high speed downlink packet access data mode of the user equipment, the data is Transmitted to the radio link control-acknowledgment mode data extracting unit and the radio link control-non-acknowledgement mode data extracting unit;
  • the radio link control-acknowledgment mode data extracting unit extracts radio link control-acknowledgment mode data And outputting data to the flow control capability allocation frame data generating unit;
  • the radio link control-non-acknowledge mode data extracting unit extracts the radio link control-non-acknowledgment mode data, and outputs the data to the radio link control-non-acknowledge mode a data service type prediction unit;
  • the radio link control-non-acknowledge mode data service type prediction unit predicts a service type of the radio link control-non-confirm mode data, and outputs the data to
  • the flow control system includes:
  • NBAP Base Station Application Part
  • FP Frame Protocol
  • N, k, ?, i, / are fixed constants; service type and service speed generated after performing service prediction processing according to radio link control-determination mode data or radio link control-non-confirmation mode data
  • the possibility of changing the downlink shared channel cell, generating a flow control capability allocation frame further includes the following steps:
  • a threshold factor ThresholdFactor is generated; a high-speed downlink shared channel quota for generating a flow control capability allocation frame:
  • the flow control method of the present invention can enable the base station to provide a high system throughput rate for the HSDPA system and reduce the service HS- while not having the service type information unit of the user equipment and the environment/location conditions of the user equipment. Packet data loss caused by DSCH cell change.
  • Figure 1 is a structural diagram of a flow control system between MAC-d (MAC-c/sh) and MAC-hs in the 3GPP Release 5 communication specification;
  • FIG. 2 is a structural diagram of a flow control device according to the present invention.
  • FIG. 3 is a flowchart of an embodiment of a flow control method according to the present invention.
  • FIG. 4 is a schematic diagram of determining a current upper and lower threshold of a single queue/the entire high speed medium access control buffer according to the present invention
  • FIG. 5 is a flowchart of an embodiment of generating a flow control capability allocation frame in the method according to the present invention.
  • HSDPA will maintain continuous coverage while providing the highest possible system capacity for WCDMA systems. For example, it is covered with the 3GPP Release 99 cell.
  • Techniques such as power control, adaptive modulation coding (AMC), hybrid automatic repeat request (HARQ), channel switching (such as HS-DSCH and DCH switching, or HS-DSCH and FACH switching) can do this.
  • AMC adaptive modulation coding
  • HARQ hybrid automatic repeat request
  • channel switching such as HS-DSCH and DCH switching, or HS-DSCH and FACH switching
  • the common pilot channel (CPICH), the downlink dedicated control physical channel (DL-DPCCH), and the high-speed shared control channel (HS-SCCH) have high reliability due to processing gain. Very big.
  • the high-speed downlink shared physical channel (HS-PDSCH) has lower reliability of correct decoding due to smaller processing gain.
  • Radio Link Control-No Acknowledgement Mode (RCC-UM) data that has been transmitted to the MAC-hs but has not been successfully received by the UE will be lost.
  • Radio Link Control-Acknowledgment Mode (RLC-AM) data is not affected.
  • the present invention mainly focuses on predicting the type of service of the UE and predicting the possibility of the UE performing the service HS-DSCH cell change in time. This not only ensures the continuity of the UE service, but also maximizes the system capacity.
  • FIG. 2 is a structural diagram of a flow control device according to the present invention.
  • An apparatus for implementing the method which is disposed in a base station medium access control sublayer, where the apparatus includes:
  • the radio link control layer mode data classification unit 1 is configured to distinguish the HSDPA data mode of the UE.
  • the input data is from the data on the Iub interface, including base station application part data (NBAP) and frame protocol (FP) data; the processed data is respectively given to the radio link control-acknowledgment mode data extracting unit 2 and the radio link control-non The mode data extracting unit 3 is confirmed.
  • NBAP base station application part data
  • FP frame protocol
  • the radio link control-confirmation mode data extracting unit 2 is configured to extract RLC-AM mode data.
  • the input data is from the radio link control layer mode data classification unit 1; the output data is supplied to the flow control capability to allocate the frame data generating unit 6.
  • Radio link control - Non-acknowledge mode data extracting unit 3 for extracting RLC-UM mode data.
  • the input data is from the radio link control layer mode data classification unit 1; the output data is sent to the radio link control-non-acknowledge mode data service type prediction unit 4.
  • the radio link control-non-acknowledge mode data service type prediction unit 4 is used to predict the service type of the RLC-UM mode data.
  • the input data comes from the radio link control-non-acknowledge mode data extracting unit 3, and the output data is supplied to the flow control capability allocation frame data generating unit 6.
  • the serving high speed downlink shared channel cell change prediction unit 5 is configured to predict a possible HS-DSCH cell change of the UE.
  • the input data comes from the scheduler, the MAC-hs buffer, and the physical layer; and the output data is allocated to the flow control capability allocation frame data generating unit 6.
  • the flow control capability allocation frame data generating unit 6 is configured to generate a flow control capability allocation frame (CAPACITY ALLOCATION Frame ).
  • the input data is from the radio link control-acknowledgment mode data extracting unit 2, the radio link control-non-acknowledge mode data service type predicting unit 4, and the serving high speed downlink shared channel cell change predicting unit 5; the data is output to the Iub interface.
  • base station application part (NBAP) and frame protocol (FP) data are obtained from the Iub interface (step 11);
  • step 12 it is judged whether the HSDPA data transmitted to the UE is RLC-AM mode data or RLOUM mode data. If it is RLC-AM mode data, go directly to step 16. Otherwise go to step 13 (step 12);
  • the traffic prediction algorithm is as follows, after which, the process proceeds to step 16 (step 13);
  • TrqffwType is a service type. Currently, only 4 types are listed. Actually, there are more types. Background is a background service, Interactive is an interactive service, Video Streaming is a video stream, and VoIP is running on an Internet protocol. Voice service on IP); P 0 nyO/T C is the service priority of packet data; 73 ⁇ 4—Pnl - 73 ⁇ 4— ⁇ 3 is a preset priority threshold, which is a fixed constant.
  • step 14 Generating according to NBAP and FP data; receiving throughput rate of UE from packet scheduler, physical layer, etc., channel quality indicator (CQI) of UE, carrier-to-interference ratio (SIR) of uplink dedicated control channel (UL-DPCCH), uplink dedicated Data such as the TPC command on the control channel (UL-DPCCH) and the transmit power of the downlink dedicated control channel (DL-DPCCH) (step 14); Performing the service HS-DSCH cell change prediction process on the data provided in step 14; the change prediction algorithm is as follows: Thereafter, the process proceeds to step 16 (step 15);
  • Po DL-DPCCH is sent to each UE
  • the carrier-to-interference ratio is then processed according to the data provided in steps 12, 13, and 15, to generate a CAPACITY ALLOCATION Frame; after that, the process ends.
  • steps 14 and 15 are independent of steps 11, 12, 13 and steps 14 and 15 can be performed prior to steps 11, 12, 13 without affecting operation result step 16.
  • Step 16 also includes the following five steps, as shown in Figures 4 and 5:
  • step 62 Determine if the current height of a single queue/entire MAC-hs buffer is between the upper and lower thresholds. If it is between the upper and lower thresholds, the subroutine ends; otherwise, go to step 63 (step 62); generate a threshold factor ThresholdFactor (step 63);
  • the HS-DSCH quota for generating the medium flow control capability allocation frame (HS-DSCHCrediO;
  • (int) represents the rounding operation
  • Throughput is the throughput of the UE
  • TrafficFactor is a business factor and is related to various predicted services
  • m»wm 4C—L3 ⁇ 4e «gt/z is the largest MAC-d protocol data unit (PDU) size for various services
  • ThresholdFactor is the threshold factor
  • P _CellCh an ge is ⁇ m
  • Other parameters of the flow control capability allocation frame may also be generated, for example, media access control - dedicated protocol data unit maximum length (Maximum MAC-d PDU) Length), high-speed downlink shared channel transmission time interval (HS-DSCH Interval) and high-speed downlink shared channel transmission repetition period (HS-DS Repetition Period).
  • Media access control - dedicated protocol data unit maximum length Maximum MAC-d PDU
  • HS-DSCH Interval high-speed downlink shared channel transmission time interval
  • HS-DS Repetition Period high-speed downlink shared channel transmission repetition period
  • the base station application part (NBAP) and frame protocol (FP) data are obtained from the Iub interface (step 21);
  • step 22 it is determined whether the HSDPA data sent to the UE is RLC-AM mode data or RLC-UM mode data; if it is RLC-AM mode data, go directly to step 26; otherwise, go to step 23 (step 22);
  • the transmit power of the downlink dedicated control channel (DL-DPCCH) (step 24)
  • step 24 The data provided in step 24 is serviced HS-DSCH cell change prediction process, and the change prediction algorithm is as follows; thereafter, the process proceeds to step 26 (step 25);
  • Power-DT-DPCCH is the transmit power of the downlink dedicated control channel sent to each UE;
  • TPC-UL-DPCCH is the uplink dedicated
  • steps 24 and 25 are independent of steps 21, 22, and 23, and steps 24 and 25 can be performed before steps 21, 22, and 23 without affecting the result of the operation.
  • Step 26 also includes the following five steps, as shown in FIG. 4 and FIG. 5:
  • step 163 Determining whether the current height of the single queue/entire MAC-hs buffer is between the upper and lower thresholds; if it is between the upper and lower thresholds, the subroutine ends; otherwise, going to step 163 (step 162); generating a threshold factor ThresholdFactor (step 163);
  • the HS-DSCH quota (HS_DSCHCredit) of the medium flow control capability allocation frame is generated (step 164), and Throughput ⁇ ⁇ afficFactor ThresholdFactor.
  • (int) represents the rounding operation
  • Throughput is the throughput of the UE
  • Traff i cFac tor is the business factor, which is related to various predicted services
  • ThresholdFactor is the threshold factor
  • P_CellChange is the possibility for the UE to serve the HS-DSCH cell change; here, it is also possible to generate other flow control capability allocation frames.
  • Parameters such as media access control - Maximum MAC-d PDU Length, high-speed downlink Shared channel transmission time interval (HS-DSCH Interval) and high-speed downlink shared channel transmission repetition period (HS-DS Repetition Period).
  • the high-speed downlink packet access flow control device and method in the WCDMA system of the present invention are not limited to the applications listed in the specification and the embodiment, and can be fully applied to various fields suitable for the present invention.
  • Other advantages and modifications may be readily made by those skilled in the art, and the invention is not limited to the specific details and representative, without departing from the spirit and scope of the general concept as defined by the appended claims.

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

Abstract

La présente invention concerne un procédé et un dispositif de commande du débit d’accès par parquet sur liaison descendante à grande vitesse dans un système WCDMA, qui comprend : une unité de classification de données d’un mode de couche de commande de liaison sans fil, permettant de distinguer un mode de données d’accès par paquet de liaison descendante à grande vitesse de l’équipement utilisateur; une unité d’extraction de données de mode commande-confirmation de la liaison sans fil destinée à extraire des données de mode commande-confirmation de liaison sans fil ; une unité d’extraction de données d’un mode de commande-non confirmation de liaison sans fil permettant d’extraire des données du mode de commande-non confirmation de liaison sans fil ; une unité de prédiction du type de service de données d’un mode de commande-non confirmation de liaison sans fil pour prédire le type de service des données du mode de commande-non confirmation de liaison sans fil ; une unité de prédiction de changement de cellules du canal de partage de liaison descendante à grande vitesse du service destinée à prédire le changement possible de cellules du service HS-DSCH de l’équipement utilisateur ; une unité de génération de données d’une structure de distribution de la capacité de commande de débit permettant de générer une structure de distribution de la capacité de commande de débit. La présente invention peut améliorer la capacité du système. En même temps, elle peut assurer la couverture continue du HSDPA et réaliser la continuité du service de l’équipement utilisateur.
PCT/CN2005/001734 2005-10-21 2005-10-21 Dispositif de commande du debit d’acces par paquet sur liaison descendante a grande vitesse WO2007045126A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2005800496699A CN101167288B (zh) 2005-10-21 2005-10-21 Wcdma系统中高速下行分组接入流量控制装置及方法
PCT/CN2005/001734 WO2007045126A1 (fr) 2005-10-21 2005-10-21 Dispositif de commande du debit d’acces par paquet sur liaison descendante a grande vitesse

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PCT/CN2005/001734 WO2007045126A1 (fr) 2005-10-21 2005-10-21 Dispositif de commande du debit d’acces par paquet sur liaison descendante a grande vitesse

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040165530A1 (en) * 2003-02-25 2004-08-26 Bedekar Anand S. Flow control in a packet data communication system
CN1529437A (zh) * 2003-10-17 2004-09-15 中兴通讯股份有限公司 Wcdma系统无线网络控制层的流量控制方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040165530A1 (en) * 2003-02-25 2004-08-26 Bedekar Anand S. Flow control in a packet data communication system
CN1529437A (zh) * 2003-10-17 2004-09-15 中兴通讯股份有限公司 Wcdma系统无线网络控制层的流量控制方法

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CN101167288A (zh) 2008-04-23
CN101167288B (zh) 2011-05-18

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