WO2007000095A1 - A operating method of a user terminal supporting high speed downlink packet access - Google Patents

A operating method of a user terminal supporting high speed downlink packet access Download PDF

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Publication number
WO2007000095A1
WO2007000095A1 PCT/CN2006/001257 CN2006001257W WO2007000095A1 WO 2007000095 A1 WO2007000095 A1 WO 2007000095A1 CN 2006001257 W CN2006001257 W CN 2006001257W WO 2007000095 A1 WO2007000095 A1 WO 2007000095A1
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WO
WIPO (PCT)
Prior art keywords
user terminal
radio
message
carriers
radio access
Prior art date
Application number
PCT/CN2006/001257
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English (en)
French (fr)
Inventor
Darun Wang
Jinling Hu
Original Assignee
Shanghai Ultimate Power Communications Technology Co., Ltd.
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Publication date
Application filed by Shanghai Ultimate Power Communications Technology Co., Ltd. filed Critical Shanghai Ultimate Power Communications Technology Co., Ltd.
Priority to US11/993,797 priority Critical patent/US20100014467A1/en
Publication of WO2007000095A1 publication Critical patent/WO2007000095A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70718—Particular systems or standards
    • H04B2201/70722—HSDPA/HSUPA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present invention relates to the field of wireless communications technologies, and in particular, to a high speed downlink packet access.
  • HSDPA 3rd Generation Partnership Project Release 5
  • HSDPA High Speed Downlink Packet Access
  • AMC Adaptive Modulation Code
  • HARQ Hybrid Automatic Repeat Request
  • the link in HSDPA will adaptively modulate and encode the method based on the quality of the radio link. Whether the user is near the base station or at the edge of the cell, link-adaptive modulation will ensure that the user can hit the highest possible transmission rate.
  • the new modulation coding in HSDPA will greatly improve user data rate and throughput, and enhance frequency speech efficiency. At the same time, users can get faster connection speeds.
  • HARQ actually combines Forward Error Code (FEC) and Automatic Repeat Request (ARQ).
  • FEC improves the reliability of transmission, but when the channel conditions are good, too many error correction bits will reduce the throughput.
  • ARQ can achieve ideal throughput without a high bit error rate, but it can cause delays.
  • the HARQ formed by combining FEC and ARQ. Error correction and error detection bits are included in each packet transmitted. If the number of error bits in the received packet is within the error correction capability, the error is corrected automatically; when the error is severe and the FEC error correction capability has been exceeded, the originator is retransmitted.
  • FIG. 1 is a schematic diagram of a part of a cell structure of a WCDMA or TD-SCDMA system. As shown in Figure 1,
  • the TD-SO)MA system includes a Radio Network Controller (RNC), a Node B (Node B), and a User Equipment (UE).
  • the HSDPA-related resources in the cell of the TD-SCDMA system include a high-speed physical downlink shared channel (HS-PDSCH, High Speed-Physical Downlink Shared). Channel ) for transmitting service data; HS-SCCH (High Speed-Shared Control Channel) for transmitting signaling information and high-speed shared information channel (HS-SICH, High Speed-Shared Information Channel) ), control information for transmitting user equipment feedback.
  • HS-PDSCH High Speed-Physical Downlink Shared
  • Channel for transmitting service data
  • HS-SCCH High Speed-Shared Control Channel
  • H-SICH High Speed-Shared Information Channel
  • HSDPA resources in a cell are reconfigured by the RNC through physical shared channels
  • the (Physical shared channel reconf igurat ion) process configures/reconfigures the cell.
  • the transport channel used to carry the high-layer data is a high-speed downlink shared channel (HS-DSCH), and the data of the HS-DSCH is mapped to the high-speed physical downlink shared channel (HS-PDSCH) after being processed by coding, interleaving, and the like.
  • the uplink is transmitted, and the user terminal and the radio access network interact through a High Speed-Shared Control Channel (HS-SCCH) and a High Speed-Shared Information Channel (HS-SICH).
  • HS-SCCH High Speed-Shared Control Channel
  • H-SICH High Speed-Shared Information Channel
  • the control information on the HS-SCCH of the user terminal receives and processes the HS-PDSCH, and responds to the ACK/NACK to the radio access network through the HS-SICH according to the decoding of the received data and the measurement of the channel (acknowledgement/ Negative response) and Channel Quality Indicator (CQI, Channel Quality Indicator), based on the information, the radio access network controls the transmission of subsequent data to the user terminal.
  • the control information on the HS-SCCH of the user terminal receives and processes the HS-PDSCH, and responds to the ACK/NACK to the radio access network through the HS-SICH according to the decoding of the received data and the measurement of the channel (acknowledgement/ Negative response) and Channel Quality Indicator (CQI, Channel Quality Indicator), based on the information, the radio access network controls the transmission of subsequent data to the user terminal.
  • CQI Channel Quality Indicator
  • the radio access network may not know whether the user terminal has the capability of receiving multiple carriers, and may simultaneously transmit data on multiple carriers. The user terminal may not work properly. Summary of the invention
  • a working method of a high-speed downlink packet access service user terminal includes:
  • the user terminal sends a message carrying the radio access capability indication information of the user terminal to the radio access network;
  • the radio access network allocates carrier resources to the user terminal according to the radio access capability indication information of the user terminal;
  • the user terminal transmits data on a carrier allocated by the radio access network.
  • the method further comprises:
  • the number of carriers that the user terminal can receive at the same time is included in the user terminal radio access capability indication information unit.
  • the interface message includes a radio resource control RRC connection setup complete message and/or a user terminal capability information message.
  • the terminal reports its radio access capability to the radio network controller in the RRC connection setup complete message.
  • the interface message further includes a radio resource control RRC connection setup request message, and an information unit is added to the RRC connection setup request message to indicate the carrier receiving capability of the user terminal.
  • the radio network controller of the radio access network knows the number of carriers that the user terminal can receive simultaneously from the message sent by the user terminal.
  • the method further comprises:
  • the radio network controller When the radio resource is allocated to the user terminal, the radio network controller notifies the base station of the number of carriers that the user terminal can receive simultaneously;
  • the base station allocates a carrier resource according to the number of carriers that the user terminal can receive at the same time.
  • the interface message sent by the user includes time-division duplex information of the high-speed downlink shared channel; and the number of carriers indicating that the user terminal can receive simultaneously is added to the duplex duplex information in the high-speed downlink shared channel.
  • the interface message includes a radio link setup request message or a radio link reconfiguration preparation message, and includes an information unit for indicating the number of carriers that the user terminal can simultaneously receive.
  • the invention increases the capability of the terminal equipment to receive the carrier number by adding the capability indication of the terminal device simultaneously receiving the number of carriers in the air interface message and the inter-network entity interface message of the radio access network, so that the radio access network can accurately know the capability of the user terminal to receive the carrier, and accordingly User terminal allocates wireless resources, in multiple loads
  • the wave cell can simultaneously provide services for user terminals with different receiving carrier capabilities, and realize the coordination work between the user terminal and the wireless access network, thereby fully utilizing wireless resources and improving system performance.
  • FIG. 1 is a schematic diagram of a part of a cell structure of a WCDMA or TD-SCDMA system
  • FIG. 2 is a flow chart of a method in accordance with an embodiment of the present invention. detailed description
  • HSDPA adopts a single carrier transmission mode, that is, the user receives the traffic channel data on one carrier. Due to the limitation of signal bandwidth, the peak rate of data transmitted using HSDPA technology is affected. Combined with multi-carrier technology, the data transmission rate of HSDPA technology can be further improved.
  • a mechanism should be provided to enable the radio access network to allocate the used carrier according to the ability of the user terminal to simultaneously receive the carrier.
  • TD-SCDMA Time Division Synchronous Code Division Multiple
  • the user terminal initiates a data transmission process as an example.
  • the process from starting the connection to allocating resources is as follows:
  • RRC Radio Resource Control
  • NAS Noil Access Stratum
  • Radio Access Bearer Radio Access Bearer
  • the above various processes are completed by message interaction between the user terminal, the base station (Node B), the radio network controller, and the core network.
  • the message carries various information elements (IE, Informat ion Element ).
  • the information element has standard defined content and format for passing various parameters and other information needed to establish a connection between the sender and the receiver of the message. If the same parameters and information need to be passed in different messages of different processes, the same information elements will be included in these messages.
  • the terminal may report its radio access capability to the radio network controller in the RRC connection setup complete message, and the message includes the UE radio acces s capabi ty (user terminal radio access capability).
  • the information element transmits the wireless access capability information of the user terminal.
  • the user terminal radio access capability information element is also used in other air interface messages that need to transmit the information, such as the UE capability information message sent by the user terminal to the radio network controller; the UE capability information message is used to control the radio network.
  • the device responds to the UE capability query message sent by the user terminal.
  • the radio access network allocates the radio resources it occupies to the user terminal.
  • the HSDPA uses a shared channel to work.
  • the radio network controller allocates the same shared channel to a group of user terminals with different capabilities.
  • the shared channel may span multiple carriers.
  • the base station is on the multiple carriers.
  • the data transmission to each user terminal is specifically scheduled within the range.
  • the radio network controller informs the base station of the capability information of the user terminal by using a radio link setup request (Radio Link Setup Reques t) message or a radio link reconfiguration request message, and the capability information is included in the high speed downlink.
  • the shared channel time is in the HS-DSCH TDD Information. Again, this information is also used in other Iub interface messages.
  • the user terminal can notify the radio network controller of its ability to receive the carrier through the air interface message.
  • the wireless connection can be made.
  • the network access is known to the carrier receiving capability; for example, an information unit may be added to the RRC connection setup request message to indicate the carrier receiving capability of the user terminal.
  • the base station can be no before the radio resource is allocated.
  • the line network controller learns the ability of the user terminal to receive the carrier.
  • the indication that the user terminal can simultaneously receive the number of carriers is included, thereby enabling the base station to The carrier receiving capability is obtained before the user terminal is allocated wireless resources.
  • step S110 the user terminal notifies the radio access network of the number of carriers that it can receive at the same time in the air interface message.
  • the information unit used in the air interface message such as the UE radio acces s capabi ty, adds an indication of the number of carriers that the user terminal can simultaneously receive, and the user terminal is the air interface message including the information unit.
  • the radio network controller of the radio access network can be informed of its ability to receive carriers.
  • step S120 the radio network controller learns from the air interface message the number of carriers that the user terminal can receive simultaneously.
  • step S130 when allocating radio resources to the user terminal, the radio network controller notifies the number of carriers that the base station user terminal can receive simultaneously through the lub interface message.
  • the information unit used in the lub interface message such as the HS-DSCH TDD Information, adds an indication of the number of carriers that the user terminal can simultaneously receive, through the lub interface message including the information unit, the radio network controller The ability of the base station user terminal to receive the carrier can be informed.
  • step S140 the base station allocates a carrier resource according to the number of carriers that the user terminal can receive at the same time.
  • the radio access network performs carrier resource allocation for the user terminal according to the number of carriers that the user terminal can receive at the same time. In this way, the radio access network can allocate carrier resources to the user terminal within the range of the number of supported carriers without exceeding the capability range and unable to receive data normally.
  • step S150 the user terminal transmits data on a carrier allocated by the radio access network.
  • the user terminal receives the data of the downlink HSDPA shared channel on the carrier allocated thereto, and can send the uplink feedback data from the above carrier.
  • Table 1 shows a possible implementation manner.
  • Table 1 is the standard format of the 3GPP specification T25331. Except for the third item in the table, the other items are standard definitions of the information unit in 3GPP, and are not described here.
  • the Access stratum unit also indicates the transport syntax of the RRC layer that the terminal supports release.
  • the terminal can receive data at the same time.
  • the RF capability system contains a "TDD RF"
  • TDD capability information unit.
  • the third item in Table 1 is added in the present invention, the name is Number of frequency, the Need column indicates that the item is optional, the Multi column indicates that the item can appear multiple times, and the description column indicates the item.
  • the meaning is used to indicate how many carriers the user terminal can receive data at the same time.
  • all air interface messages including the information element can transmit information of the user terminal receiving the carrier capability.
  • Table 2 is a possible implementation. Table 2 is the standard format of the 3GPP specification T25331. Except for the fourth item in the table, the other items are the standard definitions of the information unit in 3GPP, and are not described here.
  • the fourth item in Table 2 is added in the present invention, the name is Number of frequency, Presence ⁇ indicates that the item is optional, and the Type and Reference column indicates the position of the detailed explanation of the item in the specification.
  • the Semantics Description column indicates that the meaning of this item is used to indicate how many carriers the user terminal can receive data at the same time.
  • the present invention informs the network user terminal of the accurate carrier receiving capability by increasing the capability indication of the number of carriers simultaneously received by the user terminal in the interface message between the air interface and the network entity, so as to allocate resources between the network and the user terminal.
  • the behavior is coordinated.

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

Description

高速下行分组接入业务用户终端的工作方法 技术领域 本发明涉及无线通信技术领域， 尤其涉及一种高速下行分組接入
HSDPA用户终端的工作方法。 背景技术
为了支持高速下行数据业务， 目前在第三代合作项目组织 3GPP ( 3rd Generation Partnership Project ) Release 5规范中， 提出了高速下 行分组接入业务 ( HSDPA, High Speed Downlink Packet Access ), 所有 用户共享所有的码道资源， 并详细规定了 HSDPA 的关键技术， 如： 自适 应调制和编码 （AMC, Adaptive Modulation Code ), 混合自动重传申请 (HARQ, Hybrid Automatic Repeat Request )等。 HSDPA 中链路将根据 无线链路质量的变化而自适应调制和编码方法。 不论用户是在基站附近 或是小区边沿， 链路自适应调制将确保用户能袭得最高可能的传输速率。 HSDPA中新的调制编码将极大地提高用户数据率和吞吐量，增强了频语效 率。 同时， 用户能获得更快的连接速度。
HARQ实际上是将前向纠错编码（FEC, Forward Error Code)和自动 重传申请（ARQ, Automatic Repeat Request )相结合。 FEC提高了传输 的可靠性， 但当信道情况较好时， 过多纠错比特会降低吞吐量。 ARQ在误 码率不是很高的情况下可以得到理想的吞吐量， 但会引起延时。 将 FEC 和 ARQ相结合所形成的 HARQ。 在发送的每个数据包中含有纠错和检错的 校验比特。 如果接收包中的出错比特数目在纠错能力之内， 则错误被自 行纠正； 当差错严重， 已超出 FEC 纠错能力时， 则让发端重发。 通过自 适应编码调制 （AMC)和混合请求重传（HARQ)技术， 为信道环境好的用 户终端分配较高的速率， 为信道环境差的用户终端分配较低的速率。 图 1为 WCDMA或 TD- SCDMA系统的小区部分架构示意图。如图 1所示，
TD-SO)MA 系统包括无线网络控制器（RNC)、 节点 B (Node B) 以及用户 设备（UE)。 在 TD-SCDMA系统的小区中与 HSDPA相关的资源包括高速物 理下行共享信道 ( HS-PDSCH, High Speed-Physical Downlink Shared Channel ) , 用于传送业务数据； 高速共享控制信道 （ HS-SCCH , High Speed-Shared Control Channel ), 用于传送信令信息以及高速共享信息 言道 ( HS-SICH, High Speed-Shared Informat ion Channel ), 用于传输 用户设备反馈的控制信息。
一个小区内相关的 HSDPA 资源由 RNC 通过物理共享信道重配置
( Phys ical shared channel reconf igurat ion )过程为该小区进行配置 /重配置。 用于承载高层数据的传输信道为高速下行共享信道（HS- DSCH, High Speed-Downl ink Shared Channel ), HS-DSCH 的数据经过编码、 交 织等处理后映射到高速物理下行共享信道（HS- PDSCH )上传输， 而用户 终端和无线接入网通过下行共享控制信道（HS- SCCH, High Speed-Shared Control Channel )和上行共享信息信道（HS-SICH, High Speed-Shared Informat ion Channel )进行交互。 用户终端 居 HS- SCCH上的控制信息 对 HS- PDSCH进行接收和处理， 并根据接收数据的译码情况及对信道的测 量， 通过 HS- SICH向无线接入网回应 ACK/NACK (肯定应答 /否定应答）和 信道质量指示 （CQI， Channel Qual i ty Indicator ), 无线接入网根据这 些信息来控制对该用户终端后续数据的发送。
由于单载波提供的速率有限， 为了提高系统可提供的速率， 通常采 用扩展载频的方式， 利用多个载波进行数据传输。
在现有技术中， 当仅支持单载波的用户终端工作在多载波小区时， 无线接入网由于无法得知用户终端是否具有接收多载波的能力， 可能同 时在多个载波上发送数据 , 这样会出现用户终端无法正常工作的现象。 发明内容
本发明的目的是提供一种高速下行分組接入业务用户终端的工作方 法， 以使无线接入网可以得知用户终端接收多载波的能力， 并根据用户 终端的接收能力分配无线资源。
根据本发明提供的一种高速下行分组接入业务用户终端的工作方 法， 包括：
用户终端向无线接入网发送承载用户终端无线接入能力指示信息的 消息； 无线接入网根据用户终端的无线接入能力指示信息为所述用户终端 分配载波资源；
所述用户终端在无线接入网分配的载波上传输数据。
更适宜地， 该方法进一步包括：
在用户终端发送的接口消息中增加用户终端无线接入能力指示信息 单元；
在该用户终端无线接入能力指示信息单元中包括用户终端能够同时 接收的载波个数。
所述接口消息包括无线资源控制 RRC连接建立完成消息和 /或用户终 端能力信息消息， 在 RRC建立流程中， 终端在 RRC连接建立完成消息中， 向无线网络控制器上报其无线接入能力。
所述接口消息还包括无线资源控制 RRC 连接建立请求消息， 在 RRC 连接建立请求消息中增加一个信息单元， 用来指示用户终端的载波接收 能力。
无线接入网的无线网络控制器从用户终端发送的消息中得知所述用 户终端能够同时接收的载波个数。
更适宜地， 该方法还包括：
在给所述用户终端分配无线资源时， 无线网络控制器通知基站所述 用户终端能够同时接收的载波个数；
所述基站才艮据所述用户终端能够同时接收的载波个数为其分配载波 资源。
用户发送的接口消息包括高速下行共享信道时分双工信息； 在高速下行共享信道时分双工信息中增加指示用户终端能够同时接 收的载波个数。
所述接口消息包括无线链路建立请求消息或无线链路重配置准备消 息， 其中包含用于指示用户终端能够同时接收的载波个数的信息单元。
本发明通过在空中接口消息和无线接入网的网络实体间接口消息中 增加终端设备同时接收载波个数的能力指示， 使无线接入网能够准确获 知用户终端接收载波的能力， 并据此为用户终端分配无线资源， 在多载 波小区能够同时为具有不同接收载波能力的用户终端提供服务， 实现了 用户终端与无线接入网的协调工作， 从而充分利用无线资源， 提高系统 的效能。 附图说明
图 1为 WCDMA或 TD- SCDMA系统的小区部分架构示意图；
图 2所示为 ■据本发明的实施例所述方法的流程图。 具体实施方式
在目前的 3GPP Release 5规范中， HSDPA采用单载波传输方式， 即 用户接收业务信道数据都在一个载波上。 由于信号带宽的限制， 采用 HSDPA技术发送数据的峰值速率受到一定影响。与多载波技术结合可以进 一步提高 HSDPA技术的数据传输速率。
为了多载波小区能够同时为具有不同接收载波能力的用户终端提供 服务， 应当提供某种机制使得无线接入网能够根据用户终端同时接收载 波的能力为其分配所使用的载波。
在 TD-SCDMA (Time Division Synchronous Code Division Multiple
Access, 时分同步码分多址） 系统中， 以用户终端启动一个数据传输过 程为例， 从启动连接至分配资源的过程如下：
进行无线资源控制 RRC (Radio Resource Control )建立流程， 建立 用户终端 UE 与无线接入网的无线网络控制器 （RNC, Radio Network Controller )之间的信令连接， 在此流程中用户终端会向无线网络控制 器上报其无线接入能力；
进行非接入层 NAS (Noil Access Stratum)建立流程， 建立用户终端 与核心网络 CN (Core Network) 的信令连接， 在此流程中用户终端会提 出无线资源要求；
进行无线接入 载 RAB (Radio Access Bearer )建立流程， 建立用 户终端与核心网络之间用于传送语音、 数据及多媒体业务的用户平面承 载， 此流程中包括无线接入网向用户终端分配其占用的无线资源。
以上的各个流程通过用户终端、 基站（Node B)、 无线网络控制器和 核心网络之间的消息交互完成。 消息中携带了各种信息元素 （ IE, Informat ion Element )。 信息元素具有标准规定的内容和格式， 用来在 消息的发送方和接收方之间传递建立连接所需的各种参数和其他信息。 不同流程的不同消息中如果需要传递相同的参数和信息， 则这些消息中 会包括同样的信息元素。
在 RRC建立流程中， 终端可以在 RRC连接建立完成消息中， 向无线 网络控制器上报其无线接入能力， 这条消息通过其包括的 UE radio acces s capabi l i ty (用户终端无线接入能力）信息元素来传递用户终端 的无线接入能力信息。 同时， 用户终端无线接入能力信息元素还用在其 他需要传递该信息的空中接口消息中， 如用户终端向无线网络控制器发 送的 UE能力信息消息中； UE能力信息消息用来对无线网络控制器向用户 终端发送的 UE能力查询消息进行响应。
在 RAB建立流程中， 无线接入网会向用户终端分配其占用的无线资 源。 对多载波小区， 由于 HSDPA采用共享信道的工作方式， 无线网络控 制器会为一组能力可能不同的用户终端分配同一个共享信道， 此共享信 道可能跨多个载波； 基站在上述多个载波的范围内具体地调度到每个用 户终端的数据传输。 无线网络控制器通过无线链路建立请求（Radio Link Setup Reques t ) 消 息或无线链路重配置准备 ( Radio Link Reconf igurat ion Prepare ) 消息向基站告知用户终端的能力信息， 该能 力信息包含在高速下行共享信道时分汉工信息 （ HS-DSCH TDD Informat ion ) 中。 同样， 这一信息也用于其他 Iub接口消息中。
如果在 UE radio acces s capabi l i ty信息单元中增加用于指示用户 终端能够同时接收的载波个数， 则用户终端可以通过空中接口消息通知 无线网络控制器其接收载波的能力。 同理， 也可以在空中接口消息使用 的其他信息单元中， 或由用户自己定义一个在空中接口消息里使用的信 息单元中包括对用户终端能够同时接收载波个数的指示， 都可以使无线 接入网获知其载波接收能力； 例如， 可以在 RRC连接建立请求消息中增 加一个信息单元， 用来指示用户终端的载波接收能力。
同样， 如果在 HS-DSCH TDD Informat ion信息单元中增加用于指示 用户终端能够同时接收的载波个数， 则在分配无线资源前基站能够从无 线网絡控制器得知用户终端接收载波的能力。 同理， 也可以在 lub接口消 息使用的其他信息单元中，或由用户自己定义一个在 lub接口消息里使用 的信息单元中包括对用户终端能够同时接收载波个数的指示， 从而可以 使基站在为用户终端分配无线资源前获得其载波接收能力。
图 2 所示为根据本发明的实施例所述方法的流程图。 本发明所述
HSDPA用户终端在多载波小区的工作方法参见图 2。
在步驟 S110 , 用户终端在空中接口消息中通知无线接入网其能够同 时接收的载波个数。 如前所述， 在空中接口消息使用的信息单元， 如 UE radio acces s capabi l i ty中增加对用户终端能够同时接收的载波个数的 指示， 通过包括该信息单元的空中接口消息， 用户终端即可告知无线接 入网的无线网络控制器其接收载波的能力。
在步骤 S120, 无线网络控制器从空中接口消息中得知用户终端能够 同时接收的载波个数。
在步骤 S130, 在给用户终端分配无线资源时， 无线网络控制器通过 lub接口消息通知基站用户终端能够同时接收的载波个数。 如前所述， 在 lub接口消息使用的信息单元， 如 HS- DSCH TDD Informat ion中增加对用 户终端能够同时接收的载波个数的指示，通过包括该信息单元的 lub接口 消息 , 无线网絡控制器即可告知基站用户终端接收载波的能力。
在步驟 S140, 基站根据用户终端能够同时接收的载波个数为其分配 载波资源。
步骤 S130和步骤 S140中， 无线接入网才艮据用户终端能够同时接收 的载波个数为用户终端进行载波资源分配。 这样， 无线接入网能够在用 户终端支持载波数量的范围内为其分配载波资源， 而不会出现超过其能 力范围而无法正常接收数据的情况。
在步驟 S150, 用户终端在无线接入网分配的载波上传输数据。 用户 终端在为其分配的载波上接收下行 HSDPA共享信道的数据， 并可以从上 述载波上发送上行的反馈数据。
以在 UE radio access capability信息单元中增加对用户终端能够同时 接收的载波个数的指示为例， 下面的表 1 所示为一种可能的实现方式。 表 1为 3GPP规范 T25331的标准格式， 除表中第三项外， 其余各项均为 3GPP对该信息单元的标准定义， 此处不再赘述。
表 1
Information
Element Need Multi Type and reference Semantics description Version /Group name
根据参考文件 [35]所述， 指示终端的版本。 该信息
MP Enumerated (R99)
Access stratum 单元也指明了终端支持 release 的 RRC层的传输语法。
indicator -notjrc
—connection
Enumerated (REL-4) REL-4 SetupCompl 有 15个空闲值。 ete
CY-notjrc
UE specific 这个信息单元指示了终
—connection Enumerated
requirement 端一些特殊的需求。 有 3 REL-4
SetupCompl (REL- 4 -multicarrier)
indicator
ete 个空闲值。
Maximum number of
frequency that UE can
Number of 这个信息单元表明了终
O receive data
frequency
simultaneously. 端能够同时接收数据的
X.X.X.X 最大载波数目。
PDCP PDCP capability
MP
capability 10.3,3.24
RLC capability
RLC capability MP
10.3.3.34
Transport
Transport channel
channel MP
capability 10.3.3.40
capability
RF capability RF capability FDD
OP FDD 10.3.3.33
每个码片速率不同的系
RF capability TDD
RF capability 统都包含一个 "TDD RF
OP 10.3.3.33b
TDD capability" 信息单元。
1 to 2 REL-4
Physical
Physical channel
channel MP
capability 10.3.3.25
capability
UE
UE multi-mode
multi-mode/mu
MP /multi-RAT capability
lti-RAT
10.3.3.41
capability
Security MP Security capability Information
Element Need Multi Type and reference Semantics description Version /Group name
capability 103.3.37
UE positioning UE positioning
MP
capability capability 10.3.3.45
Measurement C -fdd—req Measurement
capability 一 sup capability 10.3.3.21
表 1中的第三项是本发明中增加的，名称为 Number of frequency (载 波个数）， Need栏表示本项是可选项， Multi栏表示本项可以出现多次， description栏表示本项的含义是用于指示用户终端能够同时在多少个载 波上接收数据。
在对 UE radio access capabilit 信息单元进行上述修改后, .所有包括 该信息单元的空中接口消息都可以传递用户终端接收载波能力的信息。
以在 HS-DSCH TDD Information信息单元中增加对用户终端能够同 时接收的载波个数的指示为例， 下面的表 2为一种可能的实现方式。表 2 为 3GPP规范 T25331的标准格式，除表中第四项外，其余各项均为 3GPP 对该信息单元的标准定义， 此处不再赘述。
表 2
Figure imgf000010_0001
表 2中的第四项是本发明中增加的，名称为 Number of frequency (载 波个数 ) , Presence桓表示本项是可选项， Type and Reference栏表示关于 本项的详细解释在规范中的位置 , Semantics Description栏表示本项的含 义是用于指示用户终端能够同时在多少个载波上接收数据。 在对 HS- DSCH TDD Information信息单元进行上述修改后， 所有包 括该信息单元的 Iub接口消息都可以传递用户终端接收载波能力的信息。
综上所述， 本发明通过在空中接口和网络实体间接口消息中增加用 户终端同时接收载波个数的能力指示， 来告知网络用户终端准确的载波 接收能力， 使网络和用户终端之间资源分配的行为得到协调。
以上所述的本发明实施方式， 并不构成对本发明保护范围的限定。 任何在本发明的精神和原则之内所作的任何修改、 等同替换和改进等， 均应包含在本发明的权利要求保护范围之内。

Claims

权 利 要 求
1. 一种高速下行分组接入业务用户终端的工作方法， 其特征在于， 包括步骤：
用户终端向无线接入网发送承载用户终端无线接入能力指示信息的 消息；
无线接入网根据用户终端的无线接入能力指示信息为所述用户终端 分配载波资源；
所述用户终端在无线接入网分配的载波上传输数据。
2. 按照权利要求 1所述用户终端的工作方法， 其特征在于， 该方法 进一步包括：
在用户终端发送的接口消息中增加用户终端无线接入能力指示信息 单元；
在该用户终端无线接入能力指示信息单元中包括用户终端能够同时 接收的载波个数。
3. 按照权利要求 2所述用户终端的工作方法， 其特征在于， 所述接 口消息包括无线资源控制 R C 连接建立完成消息和 /或用户终端能力信 息消息， 在 RRC建立流程中， 终端在 RRC连接建立完成消息中， 向无线 网络控制器上报其无线接入能力。
4. 按照权利要求 2所述用户终端的工作方法， 其特征在于， 所述接 口消息还包括无线资源控制 RRC连接建立请求消息， 在 RRC连接建立请 求消息中增加一个信息单元， 用来指示用户终端的载波接收能力。
5. 按照权利要求 1所述用户终端的工作方法， 其特征在于， 无线接 入网的无线网络控制器从用户终端发送的消息中得知所述用户终端能够 同时接收的载波个数。
6. 按照权利要求 5 所述用户终端的工作方法， 其特征在于， 该方 法进一步包括：
在给所述用户终端分配无线资源时， 无线网络控制器通知基站所述 用户终端能够同时接收的载波个数；
所述基站根据所述用户终端能够同时接收的载波个数为其分配载波 资源。
7. 按照权利要求 5或 6所述用户终端的工作方法， 其特征在于， 用 户发送的接口消息包括高速下行共享信道时分双工信息；
在高速下行共享信道时分双工信息中增加指示用户终端能够同时接 收的载波个数。
8. 按照权利要求 7所述用户终端的工作方法， 其特征在于， 所述接 口消息包括无线链路建立请求消息或无线链路重配置准备消息， 其中包 含用于指示用户终端能够同时接收的载波个数的信息单元。
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KR20080025130A (ko) 2008-03-19
US20100014467A1 (en) 2010-01-21

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