WO2003015323A1 - Procede de repartition de paquets de donnees en fonction de la capacite d'une station mobile - Google Patents

Procede de repartition de paquets de donnees en fonction de la capacite d'une station mobile Download PDF

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Publication number
WO2003015323A1
WO2003015323A1 PCT/CN2002/000153 CN0200153W WO03015323A1 WO 2003015323 A1 WO2003015323 A1 WO 2003015323A1 CN 0200153 W CN0200153 W CN 0200153W WO 03015323 A1 WO03015323 A1 WO 03015323A1
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WO
WIPO (PCT)
Prior art keywords
mobile station
packet data
capability
channel
saw
Prior art date
Application number
PCT/CN2002/000153
Other languages
English (en)
Chinese (zh)
Inventor
Ning Su
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2003015323A1 publication Critical patent/WO2003015323A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • 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
    • H04W28/14—Flow control between communication endpoints using intermediate storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to packet data scheduling in a wireless communication system, and in particular, to a method for scheduling packet data based on a data processing capability of a mobile station.
  • circuit-switched data and packet-switched data have different characteristics.
  • Circuit-switched data has real-time characteristics and can tolerate certain packet errors; packet-switched data can generally tolerate a certain delay, and the requirements for packet errors are as low as possible. Since the packet exchange data can have a time delay, the real-time limitation can be avoided, and a corresponding packet data scheduling strategy can be designed according to the needs in order to meet the requirements of system capacity and user business requirements to the greatest extent.
  • Existing packet data scheduling strategies are based on channel quality, such as C / I (Signal-to-Interference Ratio) and user-based Round-Robin (polling) strategies.
  • the C / I-based method performs scheduling based on the signal quality that each user can obtain in the cell in which the wireless system is located. For the user with the largest C / I, that is, the user with the best signal quality, priority is given to sending. Packet data; Users with poor signal quality, such as users at the edge of a cell, have a lower scheduling level for packet switching.
  • the advantage of this scheduling strategy is that it can maximize the packet exchange data throughput rate of the cell.
  • the disadvantage is that the scheduling obtained by each user is uneven, and users in the E-domain with poor signal quality may not receive data for a long time. Quality cannot be guaranteed.
  • the Round-Robin strategy is to uniformly schedule the packet data of each user and give the same limited level.
  • downlink high-speed data packet switching services transmit data through a downlink shared channel.
  • the base station allocates each user's data to different time intervals to obtain TTI (transmission Time interval)
  • TTI transmission Time interval
  • HARQ hybrid automatic repeat request mechanism
  • a multi-channel stop-and-wait (SAW) HARQ mode is usually selected.
  • SAW stop-and-wait
  • the 4-channel SAW method is the most common method for the complete cycle of continuous packet data transmission in the system.
  • the reason why the 4-channel SAW method is used is because after the data is received, it is necessary to judge whether data retransmission is required based on the received data quality.
  • the feedback of ACK / NACK (acknowledgement 0 / non-acknowledgement) information also requires processing time.
  • the 4 channels can ensure the delay processing in time without wasting system resources.
  • the sender is a base station, which can withstand high hardware complexity, and the turbo code encoder for sending data is not complicated.
  • the hardware size of the mobile station (UE) is limited, and The complexity of the Turbo code decoder is much larger than the encoder. If the mobile station has a 4-channel decoder at the same time, it will greatly increase the power consumption and cost of the mobile station.
  • the downlink control channel corresponds to the time of the data channel.
  • the mobile station After receiving the downlink control information and data, the mobile station needs a TTI time for decoding, and then sends an acknowledgement on the third acknowledgement channel relative to the downlink channel time.
  • Information to sender UTRAN After receiving the acknowledgment information, UTRAN needs a TX decoding to determine whether the data packet is successfully sent. If successful, the same can only be done in the relative
  • the third TT acknowledged by the uplink (the fifth TTI relative to the downlink) sends other data packets; if it is unsuccessful, the data packet can only be retransmitted at the third TTI acknowledged by the upstream (the fifth TTI relative to the downstream). .
  • the 4-channel SAW can make full use of the channel without wasting hardware resources.
  • the object of the present invention is to provide a packet data scheduling method based on mobile station capabilities, which can be based on 'mobile station data
  • the processing capacity is used for data scheduling, thereby improving the data processing efficiency of the entire system.
  • the method for packet data scheduling based on the capability of the mobile station provided by the present invention includes:
  • the method further includes:
  • the mobile station Set the mobile station with the best channel quality to have the highest priority. If the mobile station ’s channel SAW capability cannot meet the continuous packet data reception, in the complete time slice of the system's continuous packet data transmission, in addition to the TQ occupied by the mobile station, the remaining TTI is assigned to the mobile station with the second lowest quality. If the processing capacity of the mobile station still cannot make full use of the remaining TTI, it is allocated to the mobile station with the lower channel quality, and so on, and so on in the next system. Repeat the operation during the complete cycle of packet data transmission.
  • a corresponding bandwidth is allocated to the mobile station according to the channel SAW capability of the mobile station, and packet data is scheduled according to the bandwidth.
  • the acquisition of the SAW capability parameters of the mobile station channel described above is required when the RRC (radio resource control) is initialized or updated, or the mobile station is required to report it.
  • RRC radio resource control
  • the sending of the mobile station channel SAW capability parameters to the packet data scheduling entity of UTRAN as described above is performed by the base station controller (RC).
  • RC base station controller
  • the present invention fully considers the channel SAW capability of the mobile station when the system performs packet data transmission and transmission to the mobile station through the downlink channel, it can not only enable the system to perform data scheduling according to the data processing capability of the mobile station, but also improve the overall system packet
  • the data processing efficiency can also improve the mobile station's resource utilization rate, and urge the mobile station to design in a more reasonable price-performance direction, which is convenient for further reducing the power consumption and cost of the mobile station.
  • FIG. 1 is a flowchart of an embodiment of a method according to the present invention
  • FIG. 2 is a relationship diagram of a 4-channel SAW method.
  • the base station In the downlink high-speed data service, because mobile stations have different capabilities for receiving packet data, when the base station sends packet data, mobile stations with weak processing capabilities, such as only 1-channel SAW capabilities, cannot transmit continuous packet data in the system.
  • the packet data is continuously transmitted in the time domain of the complete cycle; for a mobile station with a strong processing capability, for example, having the capability of a 4-channel SAW, the packet data may be continuously transmitted in the time domain.
  • the mobile station informs the base station controller of the parameters of the mobile station's capabilities through the base station (BS), which includes how many channels the mobile station has, and the base station controller can also issue processing capabilities to the mobile station at any time. Consult for relevant information.
  • BS base station
  • a Universal Terrestrial Radio Access Network obtains parameters related to the processing capability of the mobile station from the core network level, and uses this as a basis for scheduling packet data for the mobile station. Assume that the complete cycle of continuous packet data transmission of the system is 4 T.
  • UTRAN can schedule continuous packet data for the mobile station; when the mobile station has a 3-channel SAW processing capability, UTRAN It can be scheduled to the mobile station for packet exchange data of no more than 3 consecutive TTIs, and can only occupy 3 transmission capacities in the 4 consecutive TTIs; when the mobile station has a 2-channel SAW processing capability, UTRAN can be scheduled to the mobile station Packet exchange data not exceeding two consecutive TTIs can only occupy two transmission capacities in four consecutive TTIs; when a mobile station has a 1-channel SAW processing capability, the packet exchange data that UTRAN can schedule to the mobile station is continuous Only 'possessed' among 4 TTIs 1 transmission capacity.
  • the above principle can be used as a scheduling policy alone, or it can be combined with a packet data scheduling strategy based on the channel shield or a packet data scheduling strategy in a polling mode as a hybrid packet data scheduling strategy.
  • the mobile station is required to report The parameters of the mobile station capability are given to the base station controller, and the base station controller can store these parameters and assign them to UTRAN as a reference for resource allocation and so on.
  • the base station controller may also request the mobile station to report the updated capability parameters at any time while the RRC remains connected.
  • FIG. 1 is a flowchart of an embodiment of a method according to the present invention.
  • the channel SAW capability of the mobile station needs to be ranked.
  • four levels are divided, 4-channel SAW capability, 3-channel SAW capability, 2-channel SAW capability, and 1-channel SAW capability.
  • 4-channel SAW capability 4-channel SAW capability
  • 3-channel SAW capability 3-channel SAW capability
  • 2-channel SAW capability 2-channel SAW capability
  • 1-channel SAW capability 1-channel SAW capability.
  • it can also be divided into other levels, such as a maximum of 6-channel SAW capabilities or a 3-channel SAW capability.
  • the connection is established or updated through RRC, or the mobile station is required to report its channel SAW capability to the base station controller when needed.
  • the scheduling entity in the UTRAN obtains the channel SAW capability parameter dispatched by the base station controller, the packet data is scheduled and allocated according to the parameter. Specifically, when the target mobile station has a 4-channel SAW processing capability, UTRAN can schedule continuous packet-switched data to the mobile station; when the target mobile station has a 3-channel SAW processing capability, UTRAN can schedule to the mobile station no more than consecutively.
  • 3 TTI packet exchange data can only occupy 3 transmission capacities in 4 consecutive TTIs; when the target mobile station has a 2-channel SAW processing capability, UTRAN can schedule the mobile station to not exceed 2 consecutive TTI packet exchange data , Can only occupy 2 transmission capacities in 4 consecutive TTIs; when the target mobile station has 1-channel SAW processing capability, the packet exchange data that UTRAN can schedule to the mobile station can only occupy 1 of 4 consecutive TTIs Transmission capacity.
  • a SAW counter needs to be set to determine whether the channel SAW capability of the mobile station has been saturated.
  • the mobile station channel SAW capability parameter is initialized when the RRC is established or updated; in step 2, the base station controller dispatches the parameter to the scheduling entity in UTRAN, and the scheduling entity receives the mobile
  • a SAW counter for each mobile station is initialized to zero; then step 3 is performed to prepare to send packet data to the mobile station; in the process of sending each packet, the data to be sent to a mobile station is prepared.
  • the packet data is processed as follows in step 4 to determine whether the target mobile station of the packet data is the same as the target mobile station of the previous TTI. If they are different, perform step 5 to send the packet data, and then perform step 6 to place the mobile station. The SAW counter is set to 1; finally step 12 is performed to prepare for the transmission of the next packet. If the target mobile station of the packet data is the same as the target mobile station of the previous TTI, it is further determined in step 7 whether the channel SAW capability of the mobile station has been saturated, that is, whether the value of the mobile station's SAW counter is the same as the mobile station. The channel SAW values of the stations are equal. If they are equal, it indicates that the channel SAW capability of the mobile station is saturated.
  • step 8 is performed to buffer the packet data, wait until the next Tx transmission, and then clear the SAW counter of the mobile station to zero. Go to step 12 to prepare for the next data packet. in case The value of the SAW counter of the mobile station is not equal to the channel SAW value of the mobile station, indicating that the channel SAW capability of the mobile station has not been saturated.
  • step 10 is performed to directly send the data packet, and then the mobile station's SAW counter Add 1 and finally execute step 12 to prepare the next data packet to be sent.
  • the invention can be well combined with the strategy based on the channel shield or round robin.
  • the mobile station with the best channel shield can continuously receive packet-switched data from the base station. Therefore, after considering the channel SAW processing capability of the mobile station, the mobile station with the best channel shield is given the highest priority. If the channel SAW capability of the mobile station cannot meet the continuous packet data reception, the continuous packet data transmission in the system In the complete cycle, in addition to the TQ occupied by the mobile station, the remaining TTI is allocated to the mobile station with the second lowest channel quality. If the processing capacity of the mobile station still cannot make full use of the remaining TTI, it is allocated to the lower channel quality.
  • the other mobile stations, and so on repeat the operation during the complete cycle of continuous packet data transmission in the next system.
  • the remaining mobile station is allocated to the mobile station with the second lowest channel quality; if the mobile station The remaining TTI is still not fully utilized, and it is allocated to the mobile station with the lower channel quality, and so on, and the operation is repeated in the next 4 TTI periods.
  • the combination process with the polling-based strategy is: allocating the corresponding bandwidth to the mobile station according to the channel SAW capability of the mobile station, that is, the percentage of the TTI of a single mobile station to the total TTI of the system's continuous packet data transmission cycle Then, packet data is scheduled according to the bandwidth.

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

Abstract

La présente invention se rapporte à un procédé de répartition de paquets de données en fonction de la capacité d'une station mobile. Ledit procédé consiste à acquérir le paramètre de capacité du canal SAW (arrêt et attente) de la station mobile, et à envoyer ledit paramètre à une entité de répartition des paquets de données de l'UTRAN. Ladite entité de répartition détermine si la station mobile cible des paquets de données est la même que la station mobile cible du dernier TTI, et si tel n'est pas le cas, elle envoie lesdits paquets de données, ou bien, lorsque tel est le cas, elle évalue la saturation de capacité du canal SAW de la station mobile, et stocke en mémoire tampon lesdits paquets de données jusqu'à l'envoi du prochain TTI ou les transmet directement. Etant donné qu'il tient entièrement compte de la capacité du canal SAW, ledit procédé peut permettre une répartition des données par le système conformément à la capacité de traitement des données, il améliore l'efficacité de traitement des paquets de données de l'ensemble du système, accroît le taux d'utilisation des ressources de la station mobile, il favorise une conception de la station mobile réduisant le prix de revient, et s'avère utile pour réduire également les pertes de puissance de la station mobile ainsi que son coût.
PCT/CN2002/000153 2001-08-06 2002-03-13 Procede de repartition de paquets de donnees en fonction de la capacite d'une station mobile WO2003015323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN01123940.9 2001-08-06
CNB011239409A CN1134918C (zh) 2001-08-06 2001-08-06 基于移动台能力的包数据调度方法

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WO2003015323A1 true WO2003015323A1 (fr) 2003-02-20

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Cited By (1)

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CN100459581C (zh) * 2006-09-21 2009-02-04 电子科技大学 一种用于实时混合业务环境的可变参数分组调度方法

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JP4301970B2 (ja) * 2004-02-23 2009-07-22 株式会社エヌ・ティ・ティ・ドコモ パケット送信制御装置及びパケット送信制御方法
CN1973497B (zh) * 2004-05-10 2011-07-06 株式会社Ntt都科摩 分组发送控制装置以及分组发送控制方法
CN100576822C (zh) * 2006-08-23 2009-12-30 上海贝尔阿尔卡特股份有限公司 无线通信网络中的数据传输及解析方法及其装置
CN102740485A (zh) * 2011-04-02 2012-10-17 中兴通讯股份有限公司 资源调度方法、用户设备和基站

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US6069886A (en) * 1996-01-05 2000-05-30 Ayerst; Douglas I. System controlled asymmetrical automatic repeat request protocol
WO2001037452A1 (fr) * 1999-11-17 2001-05-25 Motorola Inc. Procede de communication dote d'un systeme detecteur d'erreurs avec demande de repetition arret et pause multi-canaux et appareil
WO2001048958A1 (fr) * 1999-12-29 2001-07-05 Motorola Inc. Procede et appareil de communication a canaux multiplesarq a arret/attente

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Publication number Priority date Publication date Assignee Title
US6069886A (en) * 1996-01-05 2000-05-30 Ayerst; Douglas I. System controlled asymmetrical automatic repeat request protocol
US6021124A (en) * 1997-08-19 2000-02-01 Telefonaktiebolaget Lm Ericsson Multi-channel automatic retransmission query (ARQ) method
WO2001037452A1 (fr) * 1999-11-17 2001-05-25 Motorola Inc. Procede de communication dote d'un systeme detecteur d'erreurs avec demande de repetition arret et pause multi-canaux et appareil
WO2001048958A1 (fr) * 1999-12-29 2001-07-05 Motorola Inc. Procede et appareil de communication a canaux multiplesarq a arret/attente

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100459581C (zh) * 2006-09-21 2009-02-04 电子科技大学 一种用于实时混合业务环境的可变参数分组调度方法

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CN1134918C (zh) 2004-01-14
CN1400756A (zh) 2003-03-05

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