WO2009117881A1 - 随机接入响应消息的群标识生成方法及随机接入方法 - Google Patents

随机接入响应消息的群标识生成方法及随机接入方法 Download PDF

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Publication number
WO2009117881A1
WO2009117881A1 PCT/CN2008/072258 CN2008072258W WO2009117881A1 WO 2009117881 A1 WO2009117881 A1 WO 2009117881A1 CN 2008072258 W CN2008072258 W CN 2008072258W WO 2009117881 A1 WO2009117881 A1 WO 2009117881A1
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Prior art keywords
random access
slot
subframe
access slot
message
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PCT/CN2008/072258
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English (en)
French (fr)
Inventor
杜忠达
喻斌
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中兴通讯股份有限公司
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Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP08800770.3A priority Critical patent/EP2271139B1/en
Priority to JP2011501085A priority patent/JP5383789B2/ja
Priority to RU2010143321/07A priority patent/RU2469475C2/ru
Priority to US12/934,646 priority patent/US8717985B2/en
Publication of WO2009117881A1 publication Critical patent/WO2009117881A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of cellular wireless communications, and in particular, to a group identity generation method and a random access method for a random access response message.
  • the cellular wireless communication system is mainly composed of a terminal, a base station, and a core network (Core Network, CN).
  • a network composed of base stations is called a Radio Access Network (RAN), which is responsible for access layer transactions, such as management of radio resources.
  • RAN Radio Access Network
  • Each base station can be connected to one or more core network nodes.
  • the core network is responsible for non-access layer transactions, such as location updates, and is the anchor point for the user plane.
  • a terminal is a device that can communicate with a cellular wireless communication network, such as a mobile phone or a laptop.
  • the cellular wireless communication system is identified by the radio frame as the basic unit in the system time.
  • the number of these radio frames is called SFN (radio frame number).
  • the terminal can obtain the boundary of the wireless frame by means of cell search, thereby obtaining time synchronization on the downlink.
  • a cellular radio communication system such as LTE (Long Term Evolution System)
  • the length of a radio frame is 10 ms (milliseconds), as shown in FIG. 2, for FDD (Frequency Division Duplex) mode, 10 subframes are included in one radio frame.
  • Each subframe has a duration of 1 millisecond, and each subframe contains two slots, each of which is 0.5 milliseconds.
  • FIG. 1 Long Term Evolution System
  • TDD Time Division Duplex
  • the composition has a duration of 5 milliseconds, each subframe includes 5 subframes, and each subframe has a duration of 1 millisecond. Except for subframes 1 and 6, the other subframes also have two slots, wherein the duration of the subframe and the slot are
  • the FDD mode is the same; the 1st and 6th subframes are composed of 3 special time slots, which are called DwPTS, GP and UpPTS.
  • the #6 subframe can also be a normal subframe in some TDD frame formats, as shown in Figure 3.1.
  • the normal random access slot is 1 millisecond long, that is, the length of one subframe is occupied, and an extended random access slot is also introduced, which can occupy 2 to 3 subframe lengths.
  • the TDD mode also introduces a short random access slot, which is transmitted on the UpPTS slot.
  • any subframe in the time domain may be configured as a random access slot, but there is only one random access channel on a random access slot.
  • a random access channel occupies 6 Radio Resource Block (RB) bandwidths in the frequency domain.
  • RB Radio Resource Block
  • subframes 0 and 5 are always downlink slots, so they cannot be configured as random access slots.
  • UpPTS slots in subframes 1 and 6 can be configured with random access slots.
  • the other time slots can be configured with the random access time slot depends on the configuration method of the uplink and downlink time slots in the TDD frame structure, and the uplink subframe can be configured as the random access time slot.
  • the uplink subframe can be configured as the random access time slot.
  • the process of the terminal randomly accessing the cellular wireless communication system includes the following three steps:
  • Step a the terminal sends a random access preamble message to the base station on a random access slot of the radio frame;
  • Step b The base station responds to the terminal with a random access response message.
  • Step c The terminal determines, according to the group identifier in the random access response message and the index of the random access preamble, whether the correct response message is received.
  • one or more terminals may send a random access preamble message to the base station on the same random access slot.
  • the random access preamble messages may be different from each other, or may be the same, and the base station may be the same. Different random access preamble messages are identified on the random access slot.
  • the random access response message may include response information for one or more random access preamble messages. These random access preamble messages are all sent from the same random access slot.
  • the practice of combining more than one random access response information into one response message is mainly to improve the utilization of the random access procedure on the radio resources.
  • the base station adds a group identifier to the message, and the group identifier has a correspondence relationship with the random access slot that sends the random access preamble.
  • the random access response message further includes an individual identifier corresponding to the random access preamble message itself, which is usually an index number of the random access preamble, and the group identifier setting method is pre-defined in the protocol, and a certain terminal is in the direction
  • the base station sends a random access preamble message, it already knows what group identity and individual identity it will receive.
  • the random access response message is not synchronized with the random access preamble message in the time domain, that is, there is no fixed relationship between the two in the time domain; instead, random access is allowed.
  • the response message is sent within a time window.
  • the base station in response to a random access preamble message received within a random access slot, may transmit on one or more TTIs (transmission time intervals) within the above time window.
  • TTIs transmission time intervals
  • the start time of this time window is related to the speed at which the base station processes the random access preamble message
  • the end time is related to factors such as the load of the base station processing the random access preamble message and the radio resource scheduled for the random access response message.
  • step C after the terminal receives a random access response message within a specified time window, it first verifies whether the desired group identifier is included in the message; if the message includes the desired group identifier, re-verify Whether the response message further includes an individual identifier (such as an index number) corresponding to the sent random access preamble message; if the desired individual identifier (such as an index number) is included, it may be determined that the current random access response message is The random access preamble message sent corresponds to.
  • an individual identifier such as an index number
  • a method of setting a group identity in step b is proposed.
  • these methods calculate a group identity based on the absolute location of the random access slot in system time, such that the group identity is unique within a specified time frame.
  • the disadvantage of these methods is that the terminal needs to obtain the absolute system time of the cell where the random access slot is located, which is generally referred to as SFN.
  • SFN the absolute system time of the cell where the random access slot is located
  • the terminal may not know the SFN of the target cell in advance during the handover process, which cannot be
  • the group identity is calculated, and in order to obtain the SFN of the target cell, additional delays and system processing are often required, such as reading system messages, since the SFN is usually broadcast in system messages.
  • the technical problem to be solved by the present invention is to provide a group identity generation method and a random access method for a random access response message, so that the terminal can quickly and accurately access the cellular wireless communication system.
  • the present invention provides a group identity generation method for a random access response message, according to the location of the subframe where the random access slot in which the terminal transmits the random access preamble and the random access slot.
  • the number m of the access channel determines the group identity.
  • group identifier Sn + m X 10. Further, when the random access slot is an extended random access slot, the number Sn of the subframe in which the random access slot is located refers to the subframe number of the start position in the plurality of subframes occupied by the random access slot.
  • the present invention further provides a random access method for a cellular wireless communication system, in which a terminal transmits a random access preamble message to a base station in a random access slot, and then detects and randomly detects the random access preamble in a time window.
  • a random access response message corresponding to the message the random access response message includes a group of identifiers; the group identifier is based on a location Sn of a subframe in which the random access slot is located and a number of the random access channel where the random access slot is located determine.
  • group identifier Sn + m X 10.
  • the terminal reads a time window parameter of the random access from the public signaling, where the common signaling includes a system message; or the terminal reads a time window parameter of the random access from the dedicated signaling,
  • the dedicated signaling includes a handover command message.
  • the number Sn of the subframe in which the random access slot is located refers to the subframe number of the start position in the plurality of subframes occupied by the random access slot.
  • the present invention further provides a random access response method for a cellular radio communication system.
  • the base station After receiving a random access preamble message sent by a terminal in a random access slot, the base station transmits and randomly stores the time in a time window. Accessing a random access response message corresponding to the preamble message, where the random access response message includes a group identifier, where the group identifier is based on a location Sn of a subframe where the random access slot is located and a random access channel where the random access slot is located The number m is determined.
  • group identifier Sn + m X 10.
  • the number Sn of the subframe in which the random access slot is located refers to the subframe number of the start position in the plurality of subframes occupied by the random access slot.
  • the terminal can be quickly and accurately accessed into the cellular wireless communication system, and the terminal can determine the group identity in the random access response message without relying on the SFN reading, which is for the handover process.
  • the random access process performed in the middle is especially important.
  • the same method can be used to set the group identity, which is convenient to implement.
  • BRIEF abstract 1 is a structural diagram of a cellular wireless communication system in the prior art
  • 3 is a radio frame structure of an LTE TDD mode in the prior art
  • FIG. 5 is a flowchart of a random access method of a cellular wireless communication system according to an embodiment of the present invention.
  • the terminal sends a random access preamble message to the base station in the random access slot, and then detects a random access response message corresponding to the random access preamble message in the time window, where the corresponding random access
  • the response message includes a group identifier, which is determined by the number of the subframe in which the random access slot is located and the number of the random access channel in which the random access slot is located.
  • the group identifier is determined according to the following formula:
  • Group ID Sn + m x 10
  • the parameter Sn is the number of the subframe in which the random access slot is located, and the parameter m is the number of the random access channel where the random access slot is located.
  • the method for random access of a cellular radio communication system includes the following steps: Step 501: A terminal sends a random access preamble message to a base station by using a random access time slot, and according to a predetermined group identifier generation method, according to the method The location of the subframe where the random access slot is located, and the number of the random access channel where the random access slot is located, determine the group identifier that is expected to be received;
  • Step 502 The base station determines the group identity RA-RNTI (random access radio network temporary identifier) by using the same group identity generation method that is used by the terminal, and adds the random identifier together with the individual identifier corresponding to the random access preamble message. In the response message, and send the message to the terminal;
  • group identity RA-RNTI random access radio network temporary identifier
  • Step 503 When the terminal detects and determines that the group identifier and the random access preamble index in the random access response message received by the terminal are the expected values determined by the terminal, respectively, determining that the random access response message corresponds to The response message of the random access preamble message it sends.
  • the random access response message further includes an uplink radio resource allocated by the base station for the terminal.
  • the terminal after determining that the desired random access response message is received, the terminal sends a message or data to the base station by using the uplink radio resource. .
  • the time window parameter of the terminal receiving the random access response message may be that the terminal reads from the public signaling, the common signaling includes a system message, or the terminal reads from the dedicated signaling, where the dedicated The signaling includes a handover command message.
  • step 501 or 502 the method for generating the group identifier includes:
  • the group identity is determined according to the location Sn of the subframe in which the random access slot of the random access preamble message sent by the terminal is located and the number m of the random access channel where the random access slot is located.
  • the group identifier can be directly determined according to the following formula:
  • RA-RNTI Sn + m 10 ( 1 )
  • Sn refers to the number of the subframe in which the random access slot is located in the radio frame
  • Sn refers to the random access
  • n is the number of the random access channel where the random access slot is located. In FDD mode, only one random access channel is configured, m is always 0; in TDD mode, multiple random access channels can be set, m may be greater than 0.
  • the range identifier N, and the location Sn of the subframe where the random access slot is located and the number m of the random access channel where the random access slot is located may also be used to determine the group identifier, and the range value N may be configured according to the network.
  • the time window parameter is determined and can also be a constant.
  • the generation of the group identity is determined only according to the location Sn of the subframe in which the random access slot is located and the number m of the random access channel where the random access slot is located.
  • the RA-RNTI corresponding to the random access slot may be determined according to the following formula:
  • RA-RNTI RA-RNTI-COU T + Sn % N + mx N ( 2 ) where the parameters Sn and m have been described above and will not be described here.
  • the range value N may be determined according to the length of the time window in which the terminal receives the random access response message. For example, if the time window is less than or equal to 5, then N is 5; otherwise, N is 10; N can also be a constant, and the fixed value is 2, 5, or 10.
  • the time window length is configured by the system, and the terminal is informed by dedicated signaling such as handover commands or common signaling such as system messages.
  • Sn % N refers to the modulus of Sn to N, that is, the remainder of Sn divisible by N.
  • the RA-RNTI-COU T is a system-set constant that is the same as the length of the C-RNTI that the system is configured to give to the terminal.
  • the value of RA-RNTI-COUNT can be set to 0.
  • RA-RNTI Sn + m 10
  • the random access preamble message transmitted on the No. 2 subframe (Sn is 2) of the 0th random access channel (m is 0) corresponds to
  • the RA-RNTI is 2+0*10 or 2;
  • the RA-RNTI corresponding to the random access preamble message transmitted on the 8th random access channel (m is 3) in the 8th subframe (Sn is 8) is 8 +3*10 is 38.
  • the value of m is 0, and the setting time window is 4, then N is 5.
  • the RA-RNTI corresponding to the random access preamble message transmitted on the subframe 3 is RA-RNTI-COU T+3%5, that is, RA-RNTI-COUNT+3; in subframe 7
  • the RA-RNTI corresponding to the random access preamble message sent on the upper layer is RA-RNTI-COU T+7%5, that is, RA-RNTI-COU T+2.
  • the subframe 3 in the 0th random access channel (m is 0) (Sn is 3)
  • the RA-RNTI corresponding to the random access preamble message sent on the RA-RNTI-COU T+3%10+0*10 is RA-RNTI-COUNT+3; in the second random access channel (m is 2)
  • the RA-RNTI corresponding to the random access preamble message transmitted on the subframe 7 (the Sn is 7) is RA-RNTI-COU T+7%10+2*10, that is, RA-RNTI-COU T+27.
  • Embodiment 1 In the FDD mode, if the length of the receiving time window is 4 milliseconds, then N is 5, and the subframe number of the random access preamble is Sn, then:
  • RA-RNTI 0X2008 + Sn %5 , where Sn ranges from 0 to 9.
  • RA-RNTI 0X2008 + Sn %10 + m 10, where the range of Sn is 1, 2, 3, 4, 6, 7 , 8, 9.
  • the present invention provides a group identity generation method for a random access response message, a random access method for a cellular wireless communication system, and a random access response method for a cellular wireless communication system, where the terminal does not need to acquire an absolute system of a cell in which a random access slot is located. Time, enabling the terminal to quickly and accurately access the cellular wireless communication system. Moreover, regardless of how the configuration of the random access slot changes, the same method can be used to set the group identity, which is easy to implement.

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Description

随机接入响应消息的群标识生成方法及随机接入方法
技术领域
本发明涉及一种蜂窝无线通讯领域， 尤其涉及一种随机接入响应消息的 群标识生成方法及随机接入方法。
背景技术
如图 1 所示， 蜂窝无线通讯系统主要由终端、 基站、 和核心网 （Core Network, CN )组成。基站组成的网络称为无线接入网（ Radio Access Network, RAN ) 负责接入层事务， 比如无线资源的管理等。 基站之间可以根据实际情 况存在物理或者逻辑上的连接， 如图 1中的基站 1和基站 2或者基站 3的连 接。 每个基站可以和一个或者一个以上的核心网节点连接。 核心网负责非接 入层事务， 比如位置更新等， 并且是用户面的锚点。 终端是指可以和蜂窝无 线通讯网络进行通讯的各种设备， 比如移动电话或者笔记本电脑等。
蜂窝无线通讯系统在系统时间上是以无线帧为基本单位来标识的， 这些 无线帧的编号称为 SFN (无线帧号） 。 终端可以通过小区搜索的方式得到无 线帧的边界， 从而在下行上获得时间同步。 在 LTE (长期演进系统）这样的 蜂窝无线通讯系统中，无线帧的长度是 10ms (毫秒），如图 2所示，对于 FDD (频分双工）模式， 在一个无线帧中包括 10个子帧， 每个子帧时长 1毫秒， 每个子帧包含两个时隙， 每个时隙 0.5毫秒； 如图 3所示， 对于 TDD (时分 双工）模式， 一般来说， 一个帧由 2个半帧组成， 时长 5毫秒， 每个半帧包 括 5个子帧， 每个子帧时长 1毫秒， 除了 1号和 6号子帧以外， 其他子帧也 有两个时隙， 其中子帧和时隙的时长和 FDD模式相同； 1号和 6号子帧由 3 个特殊的时隙组成， 分别称为 DwPTS, GP和 UpPTS。 # 6子帧在有些 TDD 的帧格式中也可以是一个正常的子帧， 如图 3.1所示。
对于 LTE系统来说， 正常的随机接入时隙长 1毫秒， 即占用 1个子帧的 长度， 另外还引入了扩展的随机接入时隙， 可占用 2 ~ 3 个子帧长度。 TDD 模式还引入了短随机接入时隙， 在所述的 UpPTS时隙上进行发送。 FDD模式， 在时域上任何一个子帧都可能配置成随机接入时隙， 但一个 随机接入时隙上只有一个随机接入信道。 一个随机接入信道在频域上占据 6 个无线资源块（RB )带宽。 TDD模式， 在时域上， 0号和 5号子帧总是下行 时隙， 所以无法配置成随机接入时隙， 1号和 6号子帧中的 UpPTS时隙可以 配置随机接入时隙， 除此以外的其他时隙是否可以配置随机接入时隙取决于 TDD帧结构中上行和下行时隙的配置方法， 配置成上行的子帧可以作为随机 接入时隙。 TDD模式， 一个随机接入时隙上可以有 1个或者多个随机接入信 道。
现有的 LTE系统中， 终端随机接入蜂窝无线通讯系统的过程包括以下三 个步骤：
步骤 a, 终端在无线帧的某个随机接入时隙上向基站发送随机接入前导 消息；
步骤 b, 基站向终端应答随机接入响应消息；
步骤 c, 终端根据随机接入响应消息中的群标识和随机接入前导的索引 判断是否收到了正确的响应消息。
步骤 a中， 在相同的随机接入时隙上可能有一个或者一个以上的终端向 基站发送随机接入前导消息， 这些随机接入前导消息有可能互不相同， 也可 能相同， 基站可以在相同随机接入时隙上识别出不同的随机接入前导消息。
步骤 b中， 随机接入响应消息中可能会包含针对一个或者一个以上的随 机接入前导消息的应答信息。 这些随机接入前导消息都是从相同的随机接入 时隙上发送过来的。 把可能多于一个的随机接入响应信息合并在一个响应消 息中的做法主要是为了提高随机接入过程在无线资源上的利用率。 为了让终 端识别出这个随机接入响应消息， 基站会在该消息中添加群标识， 这个群标 识和发送随机接入前导的随机接入时隙之间存在对应关系。 同时随机接入响 应消息中还包括一个和随机接入前导消息本身对应的个别标识， 通常为随机 接入前导的索引号， 群标识的设置方法是在协议中事先规定的， 某个终端在 向基站发送随机接入前导消息时， 就已经知道了它将接收到什么群标识和个 别标识。 为了保持随机接入响应过程具有一定的灵活性， 随机接入响应消息在时 域上不和随机接入前导消息同步， 即两者在时域上不存在固定的关系； 相反， 允许随机接入响应消息在一个时间窗口内发送。 同时为了增加无线资源调度 的灵活性， 为响应在某个随机接入时隙内接收到的随机接入前导消息， 基站 可以在上述时间窗口内的一个或者多个 TTI (传输时间间隔）上发送与上述 随机接入前导消息对应的随机接入响应消息。 这个时间窗口的开始时间和基 站处理随机接入前导消息的快慢有关， 结束时间和基站处理随机接入前导消 息的负荷、 以及调度给随机接入响应消息的无线资源等因素有关。
步骤 C中， 当终端在规定的时间窗口内接收到 1个随机接入响应消息后， 其首先验证该消息中是否包含了期望的群标识； 如果该消息中包括了期望的 群标识， 再验证响应消息中是否还包括和所发送的随机接入前导消息对应的 个别标识 （如索引号） ； 如果包括了期望的个别标识（如索引号） ， 就可以 确定当前的随机接入响应消息是和发送的随机接入前导消息对应的。
现有已公开的技术中， 提出了在步骤 b中设置群标识的方法。 一般这些 方法会根据随机接入时隙在系统时间上的绝对位置来计算一个群标识， 使得 这个群标识在规定的时间范围内唯一。 这些方法的缺陷是首先终端需要获取 随机接入时隙所在蜂窝的绝对系统时间， 一般是指 SFN, 但在实际应用中， 比如终端在切换过程中可能事先无法知道目标蜂窝的 SFN, 这就无法计算群 标识， 而为了获取目标蜂窝的 SFN往往需要额外的延迟和系统处理， 比如读 取系统消息， 因为 SFN通常是在系统消息中广播的。
发明内容
本发明所要解决的技术问题是提供一种随机接入响应消息的群标识生成 方法及随机接入方法， 使终端快速准确的接入到蜂窝无线通讯系统中。
为了解决上述问题， 本发明提供了一种随机接入响应消息的群标识生成 方法，根据终端发送随机接入前导消息的随机接入时隙所在子帧的位置 Sn和 随机接入时隙所在随机接入信道的编号 m, 确定群标识。
进一步地， 所述群标识根据下式确定： 群标识 = Sn + m X 10。 进一步地， 所述随机接入时隙为扩展随机接入时隙时， 随机接入时隙所 在子帧的编号 Sn是指随机接入时隙占用的多个子帧中开始位置的子帧编号。
为了解决上述问题， 本发明还提供一种蜂窝无线通讯系统的随机接入方 法， 终端在随机接入时隙向基站发送随机接入前导消息， 然后在时间窗口内 检测和所述随机接入前导消息对应的随机接入响应消息； 所述随机接入响应 消息包含一群标识；所述群标识根据随机接入时隙所在子帧的位置 Sn和随机 接入时隙所在随机接入信道的编号 m确定。
进一步地， 所述群标识根据下式确定： 群标识 = Sn + m X 10。
进一步地， 所述终端从公共信令中读取随机接入的时间窗口参数， 所述 公共信令包括系统消息； 或者所述终端从专用信令中读取随机接入的时间窗 口参数， 所述专用信令包括切换命令消息。
进一步地， 所述随机接入时隙为扩展随机接入时隙时， 随机接入时隙所 在子帧的编号 Sn是指随机接入时隙占用的多个子帧中开始位置的子帧编号。
为了解决上述问题， 本发明还提供一种蜂窝无线通讯系统的随机接入响 应方法， 基站在随机接入时隙收到终端发送的随机接入前导消息以后， 在时 间窗口内发送和所述随机接入前导消息对应的随机接入响应消息， 所述随机 接入响应消息包含一群标识， 所述群标识根据随机接入时隙所在子帧的位置 Sn和随机接入时隙所在随机接入信道的编号 m确定。
进一步地， 所述群标识根据下式确定： 群标识 = Sn + m X 10。
进一步地， 所述随机接入时隙为扩展随机接入时隙时， 随机接入时隙所 在子帧的编号 Sn是指随机接入时隙占用的多个子帧中开始位置的子帧编号。
釆用本发明的方法， 可以使终端快速准确的接入到蜂窝无线通讯系统中 , 并且在终端确定随机接入响应消息中的群标识时可以不依赖于 SFN的读取， 这对于在切换过程中进行的随机接入过程尤其重要。 另外， 无论随机接入时 隙的配置如何变化， 都可以釆用相同的方法对群标识进行设置， 便于实现。 附图概述 图 1为现有技术中蜂窝无线通讯系统的结构图；
图 2为现有技术中 LTE FDD模式的无线帧结构；
图 3为现有技术中 LTE TDD模式的一种无线帧结构；
图 4为现有技术中 LTE TDD模式的另一种无线帧结构；
图 5为本发明实施例的蜂窝无线通讯系统的随机接入方法的流程图。
本发明的较佳实施方式
在本发明中， 终端在随机接入时隙向基站发送随机接入前导消息， 然后 在时间窗口内检测与所述随机接入前导消息对应的随机接入响应消息， 所述 对应的随机接入响应消息包含一群标识， 所述群标识由所述随机接入时隙所 在子帧的编号以及所述随机接入时隙所在随机接入信道的编号确定。
优选地， 所述群标识根据下式确定：
群标识 = Sn + m x 10
其中， 所述参数 Sn是所述随机接入时隙所在子帧的编号， 所述参数 m 是所述随机接入时隙所在随机接入信道的编号。
下面将结合附图及实施例对本发明的技术方案进行更详细的说明。
如图 5所示， 蜂窝无线通讯系统的随机接入方法包括以下步骤： 步骤 501 , 终端通过随机接入时隙向基站发送随机接入前导消息， 并按 照预定的群标识的生成方法， 根据此随机接入时隙所在子帧的位置、 此随机 接入时隙所在随机接入信道的编号确定期望收到的群标识；
步骤 502 , 基站釆用与终端釆用的相同的群标识生成方法确定群标识 RA-RNTI (随机接入无线网络临时标识） ， 连同与随机接入前导消息对应的 个别标识一起添加到随机接入响应消息中， 并将该消息发送给终端；
步骤 503 , 终端在时间窗口内检测和判断其收到的随机接入响应消息中 的群标识和随机接入前导的索引分别为终端确定的期望值时， 则确定此随机 接入响应消息是对应于其发送的随机接入前导消息的响应消息。 在步骤 502中， 随机接入响应消息中还包括基站为终端分配的上行无线 资源， 步骤 503中， 终端确定收到了期望的随机接入响应消息后， 通过上述 上行无线资源向基站发送消息或数据。
步骤 503中， 终端接收随机接入响应消息的时间窗口参数可以是终端从 公共信令中读取， 所述公共信令包括系统消息； 或者所述终端从专用信令中 读取， 所述专用信令包括切换命令消息。
在步骤 501或 502中， 群标识的生成方法包括：
根据终端发送的随机接入前导消息的随机接入时隙所在子帧的位置 Sn 和随机接入时隙所在随机接入信道的编号 m确定群标识。
所述群标识可以直接根据下式确定：
RA-RNTI= Sn + m 10 ( 1 ) 其中， Sn指随机接入时隙在无线帧中所在子帧的编号； 随机接入时隙为 扩展随机接入时隙时， Sn指随机接入时隙占用的多个子帧中开始位置的子帧 编号； 在 TDD模式中， 如果随机接入时隙占用 UpPTS时隙， 那么是指 1或 者 6号子帧；
m是该随机接入时隙所在随机接入信道的编号。 在 FDD模式时， 只会配 置一条随机接入信道， m总是为 0; 在 TDD模式时， 可设置多条随机接入信 道， m可能大于 0。
另外， 还可以使用一个范围值 N, 以及随机接入时隙所在子帧的位置 Sn 和随机接入时隙所在随机接入信道的编号 m确定群标识，所述范围值 N可以 根据网络配置的时间窗口参数确定， 也可以是一个常数。
当范围值 N为 10时， 群标识的生成即只根据随机接入时隙所在子帧的 位置 Sn和随机接入时隙所在随机接入信道的编号 m确定了。
可以根据下式确定与随机接入时隙对应的 RA-RNTI:
RA-RNTI = RA-RNTI-COU T + Sn % N + m x N ( 2 ) 其中， 参数 Sn及 m前面已进行说明， 此处不再赘述。 范围值 N可以根据终端接收随机接入响应消息的时间窗口长度确定。 例 如时间窗口小于等于 5时， 那么 N取值为 5; 否则 N取值为 10; N也可以是 一个常数， 取固定的值为 2、 5或 10。 时间窗口长度是系统配置的， 终端通 过专用信令比如切换命令或者公共信令比如系统消息获知。
%表示取模运算符， Sn % N指 Sn对 N的模， 即 Sn整除 N 的余数。
RA-RNTI-COU T是一个系统设定的常数， 与系统配置给终端的身份标 识 C-RNTI的长度相同即占用的比特位数相同。 RA-RNTI-COUNT的值可以 为设定为 0。
可以看出， 当 N = 10, RA-RNTI-COUNT = 0时， 上述公式（ 2 ) 即简化 成：
RA-RNTI = Sn % 10 + m 10 ( 3 ) 因为 Sn的范围是 0 ~ 9, 所以 Sn % 10 = Sn, 即公式（ 3 )与公式（ 1 )等 同：
RA-RNTI = Sn + m 10
下面以具体应用实例进一步说明：
根据公式（ 1 )确定群标识的生成：
对于 FDD模式来说， m的值为 0, 则 RA-RNTI = Sn; 那么在 2号子帧上 (即 Sn为 2 )发送的随机接入前导消息对应的 RA-RNTI为 2; 在 8号子帧上 (即 Sn为 8 )发送的随机接入前导消息对应的 RA-RNTI为 8。
对于 TDD模式来说，假设配置了 4条随机接入信道， 那么在第 0条随机 接入信道（m为 0 ) 的 2号子帧 （ Sn为 2 )上发送的随机接入前导消息对应 的 RA-RNTI为 2+0*10即 2;在第 3条随机接入信道（ m为 3 )的 8号子帧（ Sn 为 8 )上发送的随机接入前导消息对应的 RA-RNTI是 8+3*10即 38。
根据公式（2 )确定群标识的生成：
对于 FDD模式来说， m的值为 0, 4叚设接收时间窗口为 4, 则 N为 5, 那么在 3号子帧上（即 Sn为 3 )发送的随机接入前导消息对应的 RA-RNTI 为 RA-RNTI-COU T+3%5即 RA-RNTI-COUNT+3； 在 7号子帧上（即 Sn为 7 )发送的随机接入前导消息对应的 RA-RNTI为 RA-RNTI-COU T+7%5即 RA-RNTI-COU T+2。
对于 TDD模式来说，假设配置了 3条随机接入信道，接收时间窗口为 6, 则 N为 10, 那么在第 0条随机接入信道（m为 0 ) 的 3号子帧 （Sn为 3 )上 发送的随机接入前导消息对应的 RA-RNTI为 RA-RNTI-COU T+3%10+0*10 即 RA-RNTI-COUNT+3; 在第 2条随机接入信道（ m为 2 ) 的 7号子帧 （ Sn 为 7 ) 上发送 的 随机接入前 导 消 息 对应 的 RA-RNTI 是 RA-RNTI-COU T+7%10+2* 10即 RA-RNTI-COU T+27。
殳设公式（ 2 )中涉及到的 RA-RNTI-COU 为 0X2008(以十六进制表示）。 具体实施例一： 在 FDD模式中， 假设接收时间窗口长度为 4毫秒， 则 N 为 5 , 发送随机接入前导的子帧编号是 Sn, 那么：
RA-RNTI=0X2008 + Sn %5 , 其中 Sn的范围是 0 ~ 9。
Sn = 3时， 那么 RA-RNTI=0X2008 + 3=0X200B
Sn = 6时， 那么 RA-RNTI=0X2008 + 1=0X2009
具体实施例二： 在 TDD模式中， 假设接收时间窗口为 6毫秒， 则 N=10; 发送随机接入前导时隙所在子帧编号为 Sn, 随机接入前导时隙所在的随机接 入信道的编号是 m, 那么：
RA-RNTI=0X2008 + Sn %10 + m 10, 其中 Sn的范围是 1 , 2, 3 , 4, 6, 7 , 8, 9。
m = 0且 Sn = 1时， RA-RNTI=0X2008 + 1=0X2009
m = 1且 Sn = 3时， RA-RNTI=0X2008 + 3 + 10=0X2015
m = 2且 Sn = 6时， RA-RNTI=0X2008 + 6 + 20=0X2022
上述式中，十六进制的 0X2008直接与十进制的 Sn %10及 m X 10相加的 操作旨在于方便理解式（2 ) 。 尽管本发明结合特定实施例进行了描述， 但是对于本领域的技术人员来 说， 可以在不背离本发明的精神或范围的情况下进行修改和变化。 这样的修 改和变化被视作在本发明的范围和附加的权利要求书范围之内。
工业实用性
本发明提供一种随机接入响应消息的群标识生成方法、 蜂窝无线通讯系 统的随机接入方法以及蜂窝无线通讯系统的随机接入响应方法， 终端无需获 取随机接入时隙所在蜂窝的绝对系统时间， 使终端快速准确的接入到蜂窝无 线通讯系统中。 而且无论随机接入时隙的配置如何变化， 都可以釆用相同的 方法对群标识进行设置， 易于实现。

Claims

权 利 要 求 书
1、 一种随机接入响应消息的群标识生成方法，其特征在于，根据终端发 送随机接入前导消息的随机接入时隙所在子帧的位置 Sn和随机接入时隙所 在随机接入信道的编号 m, 确定群标识。
2、 如权利要求 1所述的方法， 其特征在于， 所述群标识根据下式确定： 群标识 = Sn + m x 10。
3、 如权利要求 1或 2所述的方法，其特征在于， 所述随机接入时隙为扩 展随机接入时隙时，随机接入时隙所在子帧的编号 Sn是指随机接入时隙占用 的多个子帧中开始位置的子帧编号。
4、 一种蜂窝无线通讯系统的随机接入方法，其特征在于，终端在随机接 入时隙向基站发送随机接入前导消息， 然后在时间窗口内检测和所述随机接 入前导消息对应的随机接入响应消息；所述随机接入响应消息包含一群标识； 所述群标识根据随机接入时隙所在子帧的位置 Sn和随机接入时隙所在随机 接入信道的编号 m确定。
5、 如权利要求 4所述的方法， 其特征在于， 所述群标识根据下式确定： 群标识 = Sn + m x 10。
6、 如权利要求 4或 5所述的方法，其特征在于， 所述终端从公共信令中 读取随机接入的时间窗口参数， 所述公共信令包括系统消息； 或者所述终端 从专用信令中读取随机接入的时间窗口参数， 所述专用信令包括切换命令消 息。
7、 如权利要求 4或 5所述的方法，其特征在于， 所述随机接入时隙为扩 展随机接入时隙时，随机接入时隙所在子帧的编号 Sn是指随机接入时隙占用 的多个子帧中开始位置的子帧编号。
8、 一种蜂窝无线通讯系统的随机接入响应方法，其特征在于，基站在随 机接入时隙收到终端发送的随机接入前导消息以后， 在时间窗口内发送和所 述随机接入前导消息对应的随机接入响应消息， 所述随机接入响应消息包含 一群标识，所述群标识根据随机接入时隙所在子帧的位置 Sn和随机接入时隙 所在随机接入信道的编号 m确定。
9、 如权利要求 8所述的方法， 其特征在于， 所述群标识根据下式确定： 群标识 = Sn + m x 10。
10、 如权利要求 8或 9所述的方法， 其特征在于， 所述随机接入时隙为 扩展随机接入时隙时，随机接入时隙所在子帧的编号 Sn是指随机接入时隙占 用的多个子帧中开始位置的子帧编号。
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Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5184639B2 (ja) * 2007-09-24 2013-04-17 中▲興▼通▲訊▼股▲分▼有限公司 無線セルラ通信システムにおける端末ランダムアクセス方法及びグループｉｄ生成方法
WO2012071681A1 (zh) * 2010-11-30 2012-06-07 富士通株式会社 无线通信终端、无线通信基站和它们的通信方法，以及实现该通信方法的程序和存储该程序的介质
TWI459777B (zh) * 2011-07-11 2014-11-01 Mediatek Inc 加強型傳呼的方法及其機器類型通訊裝置
EP2926614A1 (en) * 2012-11-29 2015-10-07 Telefonaktiebolaget L M Ericsson (publ) Mtc rach procedure
CN103906261B (zh) * 2012-12-28 2018-06-05 中兴通讯股份有限公司 随机接入前导处理方法及装置
CN110461022B (zh) * 2013-10-11 2022-03-25 杜塞尔多夫华为技术有限公司 M2m设备组的随机接入资源
US10051664B2 (en) * 2015-01-01 2018-08-14 Intel IP Corporation Apparatus, system and method of communicating during a discovery window
US9648616B2 (en) * 2015-01-15 2017-05-09 Nokia Solutions And Networks Oy Method and apparatus for implementing efficient low-latency uplink access
CN106304391B (zh) * 2015-06-10 2021-03-30 中兴通讯股份有限公司 一种prach接入控制方法、接入方法及装置
EP3337273A1 (en) * 2015-08-13 2018-06-20 NTT DoCoMo, Inc. User terminal, wireless base station, wireless communication method, and wireless communication system
CN106973441B (zh) * 2016-01-13 2020-01-17 中兴通讯股份有限公司 一种随机接入方法及装置
JP2019054311A (ja) * 2016-01-29 2019-04-04 シャープ株式会社 端末装置、基地局装置および通信方法
EP3439409B1 (en) * 2016-03-31 2021-10-13 Ntt Docomo, Inc. User device
US10004009B2 (en) * 2016-06-03 2018-06-19 Htc Corporation Device and method of handling a handover
WO2018103054A1 (en) * 2016-12-09 2018-06-14 Motorola Mobility Llc Mobile phone network random access
US10904921B2 (en) * 2017-06-07 2021-01-26 Samsung Electronics Co., Ltd. System and method of identifying random access response
US10720980B2 (en) 2017-07-19 2020-07-21 Qualcomm Incorporated Random access channel window design in millimeter wave shared spectrum
CN109392060B (zh) * 2017-08-02 2020-07-28 维沃移动通信有限公司 一种rar的监听方法、发送方法、相关设备及系统
CN109495975A (zh) * 2017-09-11 2019-03-19 北京三星通信技术研究有限公司 随机接入方法、基站设备及用户设备
KR102588435B1 (ko) 2017-09-08 2023-10-12 삼성전자주식회사 리소스 결정, 리소스 구성, 랜덤 액세스 프리엠블 송신 및 랜덤 엑세스를 위한 방법 및 장치
CN110475338B (zh) * 2018-05-11 2021-09-07 华为技术有限公司 上行传输的方法和用户设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101128063A (zh) * 2007-09-24 2008-02-20 中兴通讯股份有限公司 终端随机接入蜂窝无线通讯系统的方法及群标识生成方法
CN101128062A (zh) * 2007-09-24 2008-02-20 中兴通讯股份有限公司 终端随机接入蜂窝无线通讯系统的方法及群标识生成方法
US20080043702A1 (en) * 2006-08-17 2008-02-21 Samsung Electronics Co., Ltd. Method and apparatus for cell search in a communication system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040064867A (ko) 2003-01-10 2004-07-21 삼성전자주식회사 이동통신 시스템에서 역방향 메시지의 전송 구간을제공하는 방법
US7912471B2 (en) * 2006-01-04 2011-03-22 Wireless Technology Solutions Llc Initial connection establishment in a wireless communication system
WO2007083230A2 (en) 2006-01-20 2007-07-26 Nokia Corporation Random access procedure with enhanced coverage
KR100934656B1 (ko) 2006-02-06 2009-12-31 엘지전자 주식회사 다중 반송파 시스템에서의 무선 자원 할당 방법
ES2401180T3 (es) * 2006-06-01 2013-04-17 Sharp Kabushiki Kaisha Método para conectar una estación móvil a una estación base, estación móvil, estación base y sistema de comunicación móvil de múltiples portadoras
CN101132618B (zh) 2006-08-21 2010-05-12 大唐移动通信设备有限公司 随机接入信号的响应、随机接入的方法及移动通信系统
KR101424258B1 (ko) 2006-08-23 2014-08-13 엘지전자 주식회사 무선통신 시스템에서 랜덤 액세스 과정을 수행하는 방법
CN101578783A (zh) * 2007-01-10 2009-11-11 Lg电子株式会社 用于在移动通信中构造数据格式的方法及其终端
JP5184639B2 (ja) * 2007-09-24 2013-04-17 中▲興▼通▲訊▼股▲分▼有限公司 無線セルラ通信システムにおける端末ランダムアクセス方法及びグループｉｄ生成方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080043702A1 (en) * 2006-08-17 2008-02-21 Samsung Electronics Co., Ltd. Method and apparatus for cell search in a communication system
CN101128063A (zh) * 2007-09-24 2008-02-20 中兴通讯股份有限公司 终端随机接入蜂窝无线通讯系统的方法及群标识生成方法
CN101128062A (zh) * 2007-09-24 2008-02-20 中兴通讯股份有限公司 终端随机接入蜂窝无线通讯系统的方法及群标识生成方法

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