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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)
French (fr)
Inventor
Ning Su
Original Assignee
Huawei Technologies Co., Ltd.
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Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2003015323A1 publication Critical patent/WO2003015323A1/zh

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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. Transmission Power Control [TPC] 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)

Description

基于移动台能力的包数据调度方法 技术领域
本发明涉及无线通信系统中包数据的调度，具体地说涉及基于移 动台的数据处理能力对包数据进行调度的方法。
背景技术
在宽带码分多址的系统中，电路交换的数据和包交换的数据具有 不同的特性。 电路交换的数据具有实时特点， 可忍受一定的误包； 包 交换数据通常可忍受一定的时延，对误包要求尽量低。 由于包交换数 据可以允许有一定时延， 因此可以避开实时性的限制，根据需要设计 相应的包数据调度策略， 以最大限度满足系统容量、 用户业务需求等 要求。 现有的包数据调度策略有基于信道质量， 如 C/I (信干比）和 基于用户的 Round-Robin (轮询 )策略。 基于 C/I的方法是根据每个 用户在无线系统中所处的小区中所能获得的信号质量来进行调度，对 于 C/I最大的用户， 也就是获得最好信号质量的用户， 优先发送包数 据； 信号质量差的用户， 例如处于小区边缘的用户， 包交换的调度级 别较低。这种调度策略的优点是能够使小区的包交换数据吞吐率最大 化，缺点是每个用户得到的调度是不均匀的， 处于信号质量差 E域的 用户可能较长时间接收不到数据，服务质量得不到保证。 Round-Robin 策略是将每个用户的包数据均匀调度， 给以相同的有限级， 虽然这样 可以保证每个用户得到相同的服务，但是整个小区的数据吞吐率没有 前者好， 频语利用率不高。 并且， 以上两种调度策略都没有考虑用户 接收端的处理能力，如果用户接收端的数据处理能力与系统的数据调 度不协调， 也将使系统的整体数据的处理能力下降。
在宽带码分多址系统中，下行高速数据包交换业务是通过下行共 享信道来传送数据的， 以时分共享为例，基站将每个用户的数据分配 到不同的时间间隔上， 获得 TTI (传输时间间隔）多的用户得到的传 输时间多， 反之得到的传输时间就'少。 由于对包交换误包和时延的要 求， 在发送和接收的物理层面引入混合自动重传请求机制（HARQ )。 为了充分利用无线信道资源， 通常选择多信道停等（SAW ) HARQ 方式。 一般以 4信道 SAW方式作为系统连续的包数据传输的完整周 期是最通常的方式， 之所以采用 4信道 SAW方式， 是因为数据接收 后还需要根据接收的数据质量判断是否需要进行数据的重传，同时反 馈 ACK/NACK (确认 0/非确认）信息也需要处理时间， 4信道能够 保证时延处理及时， 而又不浪费系统资源。 由于在系统中， 发送方为 基站方， 可以承受较高的硬件复杂度， 并且发送数据的 Turbo码编码 器也不复杂； 在接收方来说， 移动台 （UE ) 的硬件规模受限， 并且 Turbo码解码器的复杂度要远远大于编码器。 如果移动台同时具有 4 信道的解码器， 将大大增加移动台的功耗和成本。 4信道 SAW的时 间关系图参考图 2 。 图 2中，下行的控制信道和数据信道时间对应， 当移动台接收到下行控制信息和数据后， 解码需要一个 TTI时间， 然 后在相对于下行信道时间的第三个 ΤΉ通过上行确认信道发送确认 信息给发送方 UTRAN。 UTRAN接收到确认信息后需要一个 ΤΉ解 码， 以判断该数据包是否发送成功。 如果成功， 则同样也只能在相对 上行确认的第三 ΤΉ (相对下行的第五个 TTI )发送其它数据包； 如 果不成功， 则也只能在相对上行确认的第三 TTI (相对下行的第五个 TTI )重新发送该数据包。 依据以上的处理时延分析， 4信道 SAW能 够充分利用信道并且不浪费硬件资源。
随着通信市场的发展， 移动台越来倾向功能的细分和客户化。对 于高端用户的移动台， 可具有高复杂度和高价格， 获得高服务质量的 高速数据业务； 对于一般用户的移动台， 更倾向合理的性能价格比的 服务。对于大部分用户来说， 同时连续占有多个 ΤΊΊ接收高速数据的 可能性并不大。 因此， 大部分移动台并不需要 4信道 SAW的顶级配 置，'由此可节约移动台的功耗和成本。
发明内容
根据上面所述，由于下行高速数据接收的移动台可能具有不同的 数据处理能力， 因此， 本发明的目的在于提供一种基于移动台能力的 包数据调度方法，该方法能够根据'移动台的数据处理能力进行数据调 度， 进而提高整个系统的数据处理效率。
为达到上述目的，本发明提供的基于移动台能力的包数据调度方 法包括：
( 1 )获取移动台信道 SAW (等停）能力参数， 并将该参数下派 到 UTRAN (通用陆地无线接入网） 的包数据调度实体中；
( 2 ) 准备发送包数据；
( 3 )判断所述包数据的目标移动台与上一个 TTI (传输时间间 隔） 的目标移动台是否相同， 如果不同， 发送所述包数据， 否则， ( 4 )判断该移动台的信道 SAW能力是否已经饱和，如果已经饱 和， 緩存所述包数据， 等到下一个 ΤΠ发送， 否则直接发送。
为使本发明产生更好的效果， 所述方法还包括：
设置信道质量最好的移动台优先级最高， 如果移动台的信道 SAW 能力不能满足连续的包数据接收， 在系统连续的包数据传输的 完整时间片中除了该移动台占用的 ΤΉ之外，剩余的 TTI分配 ^言道 质量次之的移动台，若该移动台的处理能力仍然不能充分利用剩余的 TTI, 则将其分配给信道质量更次之的移动台， 依次类推， 在下一个 系统连续的包数据传输的完整周期内， 重复操作。
根据移动台的信道 SAW能力为所述移动台分配到相应的带宽， 依据所述带宽进行包数据的调度。
上面所述获取移动台信道 SAW能力参数是在 RRC (无线资源控 制）初始化或更新时， 或者需要时要求移动台上报的。
上面所述将移动台信道 SAW能力参数下派到 UTRAN的包数据 调度实体中， 通过基站控制器（R C ) 完成。
由于本发明在系统通过下行信道向移动台进行包数据的调度传 送时， 充分考虑了移动台的信道 SAW能力， 既可以使系统根据移动 台的数据处理能力进行数据调度，进而提高整个系统的包数据的处理 效率， 又可以提高移动台的资源利用率， 促使移动台向更合理的性能 价格比.的方向设计， 便于进一步降低移动台的功耗和成本。
附图说明
图 1是本发明所述方法实施例流程图； 图 2是 4信道 SAW方式的关系图。
具体实施方式
为进一步了解本发明，下面结合附图对本发明作进一步详细的描 述。
在下行高速数据业务中， 由于移动台接收包数据的能力不同，在 基站方发送包数据时， 对于处理能力弱的移动台， 例如只有 1 信道 SAW 的能力， 不能在系统连续的包数据传输的完整周期的时间域内 连续传送包数据；对于处理能力较强的移动台，例如具有 4信道 SAW 的能力， 可在所述时间域上连续传送包数据。在初始建立连接的过程 ' 中， 移动台通过基站（BS )告诉基站控制器移动台能力的参数， 其 中包括了移动台具有几个信道，也可以由基站控制器随时向移动台发 出处理能力的咨询， 获得相关信息。 通用陆地无线接入网 （UTRAN, Universal Terrestrial Radio Access Network )从核心网层面获得移动台 处理能力的相关参数后， 以此为根据对移动台进行包数据的调度。假 设系统连续的包数据传输的完整周期为 4个 ΤΉ， 当移动台具有 4信 道 SAW处理能力时， UTRAN可调度给该移动台连续的包数据； 当 移动台具有 3信道 SAW处理能力时， UTRAN可调度给该移动台不 超过连续 3个 TTI的包交换数据，在连续 4个 TTI中只能占有 3个的 传输容量； 当移动台具有 2信道 SAW处理能力时， UTRAN可调度 给该移动台不超过连续 2个 TTI的包交换数据，在连续 4个 ΤΉ中只 能占有 2个的传输容量； 当移动台具有 1信道 SAW处理能力时， UTRAN可调度给该移动台的包交换数据在连续 4个 TTI中只能 '占有 1个的传输容量。
如果按照上述原则进行包数据的调度，就可以提高系统数据处理 的效率。上述原则可单独作为调度策略， 当然也可以和基于信道盾量 的包数据策略或轮询方式的包数据调度策略结合起来作为一种混合 包数据调度策略。
因此， 在宽带码分多址系统中'， 在移动台和 UTRAN初始链接的 过程中， 具体地说， 如果在无线资源控制 （RRC, Radio Resource Control )链路建立的时候， 移动台被要求上报移动台能力的参数给基 站控制器，基站控制器就可以将这些参数存储起来，根据需要下派给 UTRAN, 作为资源分配等的参考。 当然， 基站控制器在 RRC保持连 接的过程中， 也随时可以要求移动台重新上报更新的能力参数。
图 1是本发明所述方法实施例流程图。按照图 1实施本发明， 需 要将移动台的信道 SAW能力划分等级。本例中共划分了四个等级， 4 信道 SAW能力、 3信道 SAW能力、 2信道 SAW能力和 1信道 SAW 能力。 实际中， 根据实际的包数据调度的需要， 也可以划分为其它等 级， 例如最多 6信道 SAW能力或 3信道 SAW能力。
通过 RRC的连接建立或者更新， 或者需要时要求移动台将自己 的将信道 SAW能力上报给基站控制器。 在 UTRAN中的调度实体获 得基站控制器下派的信道 SAW能力参数后， 根据此参数进行包数据 的调度分配。 具体为， 当目标移动台具有 4信道 SAW处理能力时， UTRAN可调度给该移动台连续的包交换数据； 当目标移动台具有 3 信道 SAW处理能力时， UTRAN可调度给该移动台不超过连续 3个 TTI的包交换数据，在连续 4个 ΤΤΙ中只能占有 3个的传输容量； 当 目标移动台具有 2信道 SAW处理能力时， UTRAN可调度给该移动 台不超过连续 2个 TTI的包交换数据，在连续 4个 TTI中只能占有 2 个的传输容量； 当目标移动台具有 1信道 SAW处理能力时， UTRAN 可调度给该移动台的包交换数据在连续 4个 TTI中只能占有 1个的传 输容量。
图 1所述的方法在具体实施时， 还需要设置 SAW计数器， 用于 判断移动台的信道 SAW能力是否已经饱和。 这样， 按照图 1 , 在步 驟 1 , RRC建立时或更新时初始化移动台信道 SAW能力参数； 在步 骤 2， 基站控制器将该参数下派到 UTRAN中的调度实体中， 调度实 体在接收到移动台信道 SAW参数时， 初始化针对每个移动台的一个 SAW计数器为零； 然后进行步驟 3 , 准备向移动台发送包数据； 在每 个包的发送过程中，对准备发送给某个移动台的包数据在步骤 4做如 下处理，判断所述包数据的目标移动台与上一个 ΤΉ的目标移动台是 否相同， 如果不同， 执行步骤 5发送所述包数据， 然后执行步骤 6， 将该移动台的 SAW计数器置 1; 最后执行步骤 12准备下一个数据包 的发送。如果所述包数据的目标移动台与上一个 TTI的目标移动台相 同 ,则在步骤 7进一步判断该移动台的信道 SAW能力是否已经饱和， 即判断该移动台的 SAW计数器的值是否与该移动台的信道 SAW值 相等， 如果相等， 说明该移动台的信道 SAW能力已经饱和， 这时执 行步驟 8缓存所述包数据， 等到下一个 ΤΉ发送， 然后将该移动台的 SAW计数器清零， 最后执行步骤 12准备下一个数据包的发送。 如果 该移动台的 SAW计数器的值与该移动台的信道 SAW值不相等， 说 明该移动台的信道 SAW能力还没有饱和，这时执行步驟 10直接发送 该数据包， 然后将该移动台的 SAW计数器加 1 , 最后执行步骤 12准 备下一个数据包的发送。
本发明可以很好地和基于信道盾量或基于轮询 ( Round Robin ) 的策略结合起来。 在基于 C/I的调 策略中， 信道盾量最好的移动台 可以连续接收来自基站的包交换数据。 因此， 在考虑到移动台的信道 SAW处理能力后， 设置信道盾量最好的移动台优先级最高， 如果移 动台的信道 SAW能力不能满足连续的包数据接收， 在系统连续的包 数据传输的完整周期中除了该移动台占用的 ΤΉ之外， 剩余的 TTI 分配给信道质量次之的移动台，若该移动台的处理能力仍然不能充分 利用剩余的 TTI，则将其分配给信道质量更次之的移动台，依次类推， 在下一个系统连续的包数据传输的完整周期内，重复操作。也就是说， 若移动台的处理能力不能满足连续的包交换数据接收， 在 4 个 ΤΤΙ 中除了该移动台占用的 ΤΤΙ之外，剩余的分配给信道质量次之的移动 台; 若该移动台的处理能力仍然不能充分利用剩余的 ΤΤΙ， 则将其分 配给信道质量更次之的移动台， 依次类推， 在下一 4个 ΤΤΙ周期内， 重复操作。
和基于轮询策略的结合过程为： 根据移动台的信道 SAW能力为所述 移动台分配到相应的带宽，即单个移动台的 TTI个数占系统连续的包 数据传输周期内总 TTI的百分比，然后依据所述带宽进行包数据的调 度。

Claims

权 利 要 求
1、 一种基于移动台能力的包数据调度方法， 包括：
( 1 )获取移动台信道 SAW (等停）能力参数， 并将该参数下派 到 UTRAN (通用陆地无线接入网） 的包数据调度实体中；
( 2 ) 准备发送包数据；
( 3 )判断所述包数据的目标移动台与上一个 TTI (传输时间间 隔） 的目标移动台是否相同， 如果不同， 发送所述包数据， 否则，
( 4 )判断该移动台的信道 SAW能力是否已经饱和，如果已经饱 和， 緩存所述包数据， 等到下一个 TTI发送， 否则直接发送。
2、 根据权利要求 1所述的包数据调度方法， 其特征在于， 该方 法还包括： 设置 SAW计数器， 用于判断移动台的信道 SAW能力是 否已经饱和。 '
3、 根据权利要求 1 所述的包数据调度方法， 其特征在于， 该方 法还包括： 设置信道质量最好的移动台优先级最高， 如果移动台的信 道 SAW能力不能满足连续的包数据接收， 在系统连续的包数据传输 , 的完整周期中除了该移动台占用的 TTI之外，剩余的 ΤΉ分配给信道 质量次之的移动台，若该移动台的处理能力仍然不能充分利用剩余的 TTI, 则将其分配给信道质量更次之的移动台， 依次类推， 在下一个 系统连续的包数据传输的完整周期内， 重复操作。
4、 根据权利要求 1 所述的包数据调度方法， 其特征在于， 该方 法还包括： 根据移动台的信道 SAW能力为所述移动台分配到相应的 带宽， 依据所述带宽进行包数据的调度。
5、 根据权利要求 1 所述的包数据调度方法， 其特征在于： 所述 获取移动台信道 SAW能力参数是在 RRC (无线资源控制）初始化或 更新时， 或者需要时要求移动台上报的。
6、 根据权利要求 1 所述的包数据调度方法， 其特征在于： 所述 将移动台信道 SAW能力参数下派到 UTRAN的包数据调度实体中， 通过基站控制器（ RNC ) 完成。
7、 根据权利要求 1 所述的包数据调度方法， 其特征在于， 该方 法还包括： 将移动台的信道 SAW能力划分为四个等级， 4信道 SAW 能力、 3信道 SAW能力、 2信道 SAW能力和 1信道 SAW能力。
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