WO2010124548A1 - 无线链路层状态包的发送方法和装置 - Google Patents

无线链路层状态包的发送方法和装置 Download PDF

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Publication number
WO2010124548A1
WO2010124548A1 PCT/CN2010/071428 CN2010071428W WO2010124548A1 WO 2010124548 A1 WO2010124548 A1 WO 2010124548A1 CN 2010071428 W CN2010071428 W CN 2010071428W WO 2010124548 A1 WO2010124548 A1 WO 2010124548A1
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Prior art keywords
link layer
receiving end
radio link
packet
response
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PCT/CN2010/071428
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English (en)
French (fr)
Inventor
黄侃
张健
Original Assignee
中兴通讯股份有限公司
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.)
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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 US13/257,992 priority Critical patent/US20120044797A1/en
Priority to EP10769237.8A priority patent/EP2426982A4/en
Publication of WO2010124548A1 publication Critical patent/WO2010124548A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/188Time-out mechanisms
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607Details of the supervisory signal
    • H04L1/1685Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal

Definitions

  • the present invention relates to the field of digital mobile communication technologies, and in particular, to a method and apparatus for transmitting a status packet of a radio link control layer.
  • High Speed Packet Access Plus HSPA+
  • 3GPP 3rd Generation Partnership Project
  • UTRAN Universal Terrestrial Radio Access Network
  • the Link Control Layer RLC
  • PDU Radio Link Layer Protocol Data Unit
  • POLL-SUFI Super Field Query
  • the serial number of the PDU) whose value is VT(S)-1 (VT(S) indicates the sequence number of the next PDU to be transmitted).
  • the receiving end After receiving the status packet POLL_SUFI, the receiving end has the same processing method as receiving other data packets of type POLL, and needs to return the corresponding status packet according to the actual receiving condition. In this way, you can reduce the waste of bandwidth caused by sending large packets, especially when you retransmit many times. A small cost is achieved to restore the window sliding of the wireless link layer of both parties, so that the data continues to be transmitted. If a problem occurs in the transmission link or the air interface, an RLC reset process is required.
  • the existing protocol only defines such a new stateful packet POLL_SUFI, and specifies that when a variable length radio link layer PDU packet is defined, the Universal Terrestrial Radio Access Network (UTRAN) can issue this.
  • POLL The status package for SUFI.
  • the UTRAN issues such a POLL_SUFI status packet, if the user equipment cannot receive the POLL_SUFI status packet due to the transmission path or the wireless path, the response cannot be returned, and the UTRAN side does not have any The new data needs to be sent, then UTRAN will re-send the POLL_SUFI status packet and cannot actively reset it, causing the system to enter an unrecoverable abnormal state.
  • the present invention provides a method for transmitting a radio link layer status packet, including: when a universal terrestrial radio access network detects that there is an unacknowledged data to be transmitted, and sends a radio link layer status to the receiving end. After receiving the response from the receiving end after the packet, the radio link layer is reset.
  • the foregoing method may further have the following features: after the universal terrestrial radio access network detects that there is sent unacknowledged data to be sent, the method further includes: detecting whether the wireless link layer is configured with a variable length protocol data unit; When the wireless link layer is configured with a variable length protocol data unit, the radio link layer status packet sent to the receiving end is a super field interrogation status packet.
  • the above method may also have the following features: the response of the unreceived receiving end is that the receiving end does not receive the response of the receiving end after the universal terrestrial radio access network sends the radio link layer status packet. .
  • the above method can also have the following characteristics: The response of the receiving end is that after the universal terrestrial radio access network sends the radio link layer status packet, when the response of the receiving end is not received within the time set by the system, the receiving end is heavy The wireless link layer status packet is sent, and the number of retransmissions reaches the maximum number of transmissions set by the system, and the response of the receiving end is not received within the system set time.
  • the above method may also have the following features: when the universal terrestrial radio access network detects that there is sent unacknowledged data to be transmitted, and the universal terrestrial radio access network detects that the radio link layer is not configured with the variable length protocol data unit, The method further includes: activating an inquiry flag bit of the last transmitted protocol data unit data packet and transmitting the protocol data unit data packet, and resending the response to the receiving end when the response of the receiving end is not received within a time set by the system.
  • the protocol data unit data packet, the number of retransmissions reaches the maximum number of transmissions set by the system, and when the response of the receiving end is not received within the system setting time, the radio link layer is reset.
  • the above method may further have the following feature: in the step of retransmitting the radio link layer status packet to the receiving end, transmitting the radio link layer by using a retransmission number flag bit in the last transmitted protocol data unit data packet. The number of status packets is counted.
  • the above method may also have the following features: The value of the maximum number of transmissions of the radio link layer status packet is different from the value of the maximum number of transmission times of the protocol data unit data packet.
  • the response of the unreceived receiving end is that after the universal terrestrial radio access network sends the radio link layer status packet to the receiving end, the system does not receive the time set by the system.
  • the POLL flag bit transmits the data packet, and does not receive the response from the receiving end within the time set by the system, and retransmits the protocol data unit data packet to the receiving end, when the number of retransmissions reaches the protocol data unit data packet set by the system. After the maximum number of transmissions, and the response of the receiving end has not been received within the system setting time.
  • the above method may also have the following features: The maximum number of times the wireless link layer status packet is sent is greater than the maximum number of times the protocol data unit data packet is sent.
  • the above method may also have the following features: in the step of retransmitting the protocol data unit data packet to the receiving end, sending the protocol data unit data packet by using a retransmission number flag bit pair in the last transmitted protocol data unit data packet. The number of times is counted; in the step of retransmitting the radio link layer status packet to the receiving end, an independent counter is set to count the number of times the radio link layer status packet is transmitted.
  • the present invention provides a radio link layer status packet sending apparatus, which is applied to a universal terrestrial radio access network, and the transmitting apparatus includes a transmission detecting module, a transmitting module, a receiving detecting module, and a reset module, wherein
  • the sending detection module is configured to: notify the sending module when the presence of the sent unacknowledged data is detected to be sent;
  • the sending module is configured to: send the wireless to the receiving end according to the detection result of the sending detecting module a link layer status packet;
  • the receiving and detecting module is configured to: if the sending module sends a radio link layer status packet, and does not receive a response from the receiving end, instructing the reset module to perform a radio link layer reset operation;
  • the reset module is configured to: perform a reset operation of the wireless link layer according to the indication of the receiving detection module.
  • the sending device may further have the following features: the sending detecting module is further configured to: detect that there is sent unacknowledged data to be sent, and when the wireless link layer detects that the variable length protocol data unit is configured, notify the sending module; The sending module is further configured to: if the sending detection module detects that there is sent unacknowledged data to be sent, and detects that the wireless link layer is configured with the variable length protocol data unit, send the super field query status packet to the receiving end.
  • the foregoing sending apparatus may further have the following feature: the receiving and detecting module is further configured to: after receiving a response from the receiving end within a system setting time after the sending module sends the wireless link layer status packet, indicating the resetting module Perform a reset operation of the wireless link layer.
  • the foregoing sending apparatus may further have the following features: the receiving and detecting module is further configured to: after the sending module sends the wireless link layer status packet, when the response of the receiving end is not received within the time set by the system, Receiving, by the receiving end, the radio link layer status packet, the number of retransmissions reaches the maximum number of transmissions set by the system, and if the response of the receiving end is not received within the system setting time, the reset module is instructed to perform the radio link layer. Reset operation.
  • the foregoing sending device may further have the following features: the receiving and detecting module is further configured to: after the sending module sends the wireless link layer state packet, does not receive a response from the receiving end within a time set by the system, and receives the Retransmitting the radio link layer status packet, and after the number of retransmissions reaches the maximum number of radio link layer status packets set by the system, the POLL flag of the last transmitted protocol data unit packet is activated and the data is sent.
  • the packet does not receive the response from the receiving end within the time set by the system, and retransmits the protocol data unit data packet to the receiving end, when the number of retransmissions reaches the maximum number of times the protocol data unit data packet is set by the system, and If the response of the receiving end is not received within the system setting time, the reset module is instructed to perform a wireless link layer reset operation.
  • FIG. 1 is a flowchart of a method for transmitting a radio link layer status packet in an embodiment
  • FIG. 2 is a flowchart of a method for transmitting a radio link layer status packet in the first embodiment
  • FIG. 3 is a radio link in the second embodiment.
  • 4 is a flow chart of a method for transmitting a radio link layer status packet in Embodiment 4.
  • the method for transmitting a radio link layer status packet includes: when the universal terrestrial radio access network detects that there is an unacknowledged data to be sent, and sends a radio link layer status packet to the receiving end, At the receiving end, a radio link layer reset operation is performed.
  • the method for transmitting a radio link layer status packet includes: Step 101: Determine whether the use of the POLL flag bit is prohibited. If yes, the POLL flag bit does not need to be activated, and the PDU packet is normally sent.
  • Step 102 determine whether there is data to be sent in the retransmission buffer, and if so, activate the POLL flag of the PDU packet in the retransmission buffer and send the PDU packet; otherwise, Go to step 103; Step 103, determine whether there is data to be sent in the buffer to be sent, if yes, activate the POLL flag of the PDU packet in the buffer to be sent and send the PDU packet; otherwise, go to the step Step 104: Determine whether there is data in the sent buffer that has not been sent, if yes, go to step 105; otherwise, the process ends; Step 105, determine whether the variable link protocol data unit is configured in the wireless link layer.
  • Step 106 send the POLL_SUFI status packet, the sequence number of the POLL_SUFI status packet is VT(S)-1, which corresponds to the last time Sequence number of the data packet; and proceeds to step 108;
  • Step 107 activates the POLL flag bit of the PDU packet of the sequence VT(S)-1 and transmits it; and proceeds to step 108;
  • Step 108 if set in the system If the response from the receiving end is not received within the time, the wireless chain is performed. Reset operation of the road layer; the process ends.
  • the wireless chain is performed.
  • the reset operation of the road layer after the POL (S)-1 PDU packet is sent once the POLL_SUFI status packet is sent or the sequence of the POLL flag is activated, and the response of the receiving end is not received within the system setting time, the wireless chain is performed. The reset operation of the road layer.
  • Embodiment 2 The maximum number of transmissions is set by the UTRAN. After the POLL_SUFI status packet is sent or the sequence of the POLL flag is activated, the PDU packet of the VT(S)-1 is not received by the receiving end within the time set by the system. When responding, retransmit the POLL_SUFI status packet to the receiving end or activate the POL packet with the sequence of POL(S)-1, when the number of retransmissions reaches the maximum number of transmissions, and is set in the system. When the response from the receiving end has not been received within the time, the radio link layer is reset. As shown in FIG.
  • Steps 201 to 207 in the second embodiment are the same as steps 101 to 107 in the first embodiment;
  • Step 208 the response of the receiving end is not received within the system setting time;
  • Step 209 determining The POLL_SUFI status packet or the sequence of the activated POLL flag bit is whether the number of transmissions of the PDU packet of VT(S)-1 reaches the maximum number of transmissions set by the system, and if yes, go to step 210; otherwise, continue to retransmit;
  • the VT (DAT) flag of the last transmitted PDU packet is used, and the value of VT (DAT) of the PDU packet is incremented by one every time it is retransmitted.
  • Step 210 Perform a reset operation of the radio link layer; the process ends.
  • the POL data packet of the POL (S)-1 is transmitted multiple times for the POLL_SUFI state packet or the sequence of the activated POLL flag bit, and the response of the receiving end is not received.
  • the reset operation of the wireless link layer extends the allowable time for the receiver to return a response.
  • Embodiment 3 The process of the third embodiment is basically the same as that of the second embodiment, and the difference is that POLL—The sequence of the SUFI status packet and the active POLL flag bit sets different maximum transmission times for PDU packets of VT(S)-1, and sets a new counter for the POLL_SUFI status packet, such as VT (POLL), per retransmission.
  • VT POLL
  • One POLL_SUFI status packet, the value of VT (POLL) is incremented by one.
  • PDU packets with a sequence of VT(S)-1 still use VT (DAT).
  • Embodiment 4 In the fourth embodiment, the receiving end that does not support the POLL_SUFI status packet is considered. After the POLL_SUFI status packet is sent multiple times, no response is received, possibly because the receiving end does not support the POLL_SUFI status packet. As shown in FIG. 4, the following steps are specifically included in the fourth embodiment: Steps 401 to 404 in the fourth embodiment are the same as steps 101 to 104 in the first embodiment; Step 405, determining whether the wireless link layer is configured with a variable length protocol data unit If yes, go to step 406; otherwise, go to step 409; Step 406, send the POLL_SUFI status packet, the sequence number of the POLL_SUFI status packet is VT(S)-1, which corresponds to the last data sent.
  • Step 407 The response of the receiving end is not received within the system setting time; Step 408, determining whether the number of times the POLL_SUFI status packet is sent reaches the POLL_SUFI status packet set by the system for the POLL_SUFI status packet. The number of transmissions, if yes, go to step 409; otherwise, go to step 406, resend; step 409, activate the POLL flag of the PDU packet of sequence VT(S)-1 and send it; step 410, set in the system The response of the receiving end is not received within a fixed time; Step 411, determining whether the number of times the POL packet of the VT (S)-1 is activated in the sequence in which the POLL flag is activated reaches the maximum transmission of the PDU packet set by the system for the PDU packet.
  • the radio link layer status packet sending apparatus of the embodiment of the present invention is applied to a universal terrestrial radio access network, and includes a sending detection module, a sending module, a receiving detecting module, and a reset module, where:
  • the sending detection module is configured to: notify the sending module when the presence of the sent unacknowledged data is detected to be sent; the sending module is configured to: send the wireless chain to the receiving end according to the detection result of the sending detecting module a layer status packet; the receiving detection module is configured to: if the sending module sends a radio link layer status packet, and does not receive a response from the receiving end, instructing the reset module to perform a radio link layer reset operation; The module is configured to: perform a reset operation of the wireless link layer according to the indication of the receiving detection module.
  • the sending detection module is further configured to: detect that there is sent unacknowledged data to be sent, and notify the sending module when detecting that the wireless link layer is configured with a variable length protocol data unit; the sending module is further configured to: The sending detection module detects that there is sent unacknowledged data to be sent, and when detecting that the wireless link layer is configured with the variable length protocol data unit, sends a super field inquiry status packet to the receiving end.
  • the receiving detection module is further configured to: after receiving the response of the receiving end within a system setting time after the sending module sends the wireless link layer status packet, instructing the reset module to perform a wireless link layer reset operation.
  • the receiving detection module is further configured to: after the sending module sends the wireless link layer status packet, when the response of the receiving end is not received within a time set by the system, retransmitting the wireless link to the receiving end
  • the layer status packet the number of retransmissions reaches the maximum number of transmissions set by the system, and the response of the receiving end is not received within the system setting time, and the reset module is instructed to perform the radio link layer reset operation.
  • Work is further configured to: after the sending module sends the radio link layer status packet, does not receive a response from the receiving end within a time set by the system, and retransmits the radio link layer to the receiving end.
  • the status packet after the number of retransmissions reaches the maximum number of transmissions of the wireless link layer status packet set by the system, activates the POLL flag of the last transmitted protocol data unit packet and sends the data packet within the time set by the system.
  • Receiving the response from the receiving end resending the protocol data unit data packet to the receiving end, and after the number of retransmissions reaches the maximum number of transmission times of the protocol data unit data packet set by the system, and still not received within the system setting time
  • the response of the receiving end instructs the reset module to perform a reset operation of the radio link layer.
  • the present invention provides a method and apparatus for transmitting a radio link layer status packet.
  • a path between the UTRAN and the receiving end is faulty or invalid, timely RLC reset is beneficial to maintain system stability and self-healing.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

本发明公开了一种无线链路层状态包的发送方法和装置,所述发送方法包括:通用陆地无线接入网检测到存在已发送未确认数据有待发送时,向接收端发出无线链路层状态包后未收到接收端的响应,则进行无线链路层的复位操作。本发明在通用陆地无线接入网与接收端间通路故障或无效时,及时进行无线链路控制层复位,有利于保持系统的稳定性和自恢复性。

Description

无线链路层状态包的发送方法和装置
技术领域 本发明涉及数字移动通信技术领域, 特别涉及无线链路控制层的状态包 发送方法和装置。
背景技术 随着用户对移动环境下的数据传输速率的要求日益提高和移动通讯技术 的不断发展, 增强高速分组接入 ( High Speed Packet Access Plus, HSPA+ ) 技术越来越受到人们关注和重视。 在第三代合作伙伴计划 ( 3rd Generation Partnership Project, 简称 3GPP ) TS 25.322 R7协议版本中, 为了适应下行的高速业务发展, 在通用陆地无线 接入网( Universal Terrestrial Radio Access Network, 简称 UTRAN )的无线链 路控制层(Radio Link Control, 简称 RLC ) 配置了变长的无线链路层协议数 据单元( Protocol Data Unit, 简称 PDU )来提高数据的发送效率。 同时, 为 了减少重发较大数据包带来的空口带宽浪费, 定义了一种新的状态包, 称为 POLL— SUFI (超字段探询),其包结构如下表所示, 包括类型(填充为 POLL ) 和序列号。
Type = POLL
Poll_SN 当 RLC层的 Polling被触发的时候, 如果没有新数据或者重发数据需要 发送的时候, 由于状态包 POLL— SUFI 非常短, 所以可以用发送状态包 POLL— SUFI 来代替原来需发送的尚未被确认的数据包, 其中的序列号
PDU )的序列号,其值为 VT(S)-1 ( VT ( S )表示要发送的下个 PDU的序号)。 接收端收到状态包 POLL— SUFI后的处理方法与收到其它类型为 POLL的数 据包相同, 需要根据实际接收情况返回相应的状态包。 通过这种方法, 可以 降低发送较大数据包带来的带宽浪费, 特别是在重发很多次的时候, 可以用 较小的代价来达到恢复双方无线链路层的窗口滑动, 使数据继续传输, 如果 发现传输链路或者空口已经出现问题, 需要进行 RLC复位的流程。 现有的协议中只是定义了这样一种新的状态包 POLL— SUFI ,并且规定当 定义了变长的无线链路层 PDU 数据包的时候, 通用陆地无线接入网 ( UTRAN ) 可以下发此 POLL— SUFI 的状态包。 但是在实际的应用中, 当 UTRAN下发这样的 POLL— SUFI状态包之后,如果由于传输路径或者无线通 路的原因,用户设备无法收到此 POLL— SUFI状态包则无法返回响应, UTRAN 端又没有新的数据需要下发, 那么 UTRAN会不停地重发此 POLL— SUFI状 态包, 而且无法主动进行复位,从而导致系统进入一种无法恢复的异常状态。
发明内容
保持系统的稳定性和自恢复性。 为了解决上述技术问题,本发明提供一种无线链路层状态包的发送方法, 包括: 通用陆地无线接入网检测到存在已发送未确认数据有待发送时, 向接收 端发出无线链路层状态包后未收到接收端的响应, 则进行无线链路层的复位 操作。 上述方法还可具有以下特点: 在所述通用陆地无线接入网检测到存在已发送未确认中数据有待发送 后, 还包括: 检测无线链路层是否配置了变长协议数据单元; 如果检测到无线链路层配置了变长协议数据单元时, 向接收端发出的无 线链路层状态包为超字段探询状态包。 上述方法还可具有以下特点: 所述未收到接收端的响应是指, 在所述通用陆地无线接入网发出所述无 线链路层状态包后的系统设定时间内未收到接收端的应答。 上述方法还可具有以下特点: 所述未收到接收端的响应是指, 在所述通用陆地无线接入网发出所述无 线链路层状态包后, 在系统设定的时间内未收到接收端的应答时, 向接收端 重发所述无线链路层状态包, 重发次数达到系统设置的最大发送次数, 而且 在系统设定时间内仍未收到所述接收端的应答。 上述方法还可具有以下特点: 在通用陆地无线接入网检测到存在已发送未确认有数据有待发送后, 通 用陆地无线接入网检测到无线链路层未配置变长协议数据单元时, 所述方法 还包括: 激活最后一次发送的协议数据单元数据包的探询标志位并发送此协议数 据单元数据包, 在系统设定的时间内未收到接收端的应答时, 向接收端重发 所述协议数据单元数据包, 重发次数达到系统设置的最大发送次数, 而且在 系统设定时间内仍未收到所述接收端的应答时,进行无线链路层的复位操作。 上述方法还可具有以下特点: 在向接收端重发所述无线链路层状态包的步骤中, 使用最后一次发送的 协议数据单元数据包中重发次数标志位对发送所述无线链路层状态包的次数 进行计数。 上述方法还可具有以下特点: 所述无线链路层状态包的最大发送次数的值与所述协议数据单元数据包 最大发送次数的值不相同。 上述方法还可具有以下特点: 所述未收到接收端的响应是指, 所述通用陆地无线接入网向接收端发出 所述无线链路层状态包后, 在系统设定的时间内未收到接收端的应答, 向接 收端重发所述无线链路层状态包, 当重发次数达到系统设定的无线链路层状 态包最大发送次数后, 激活最后一次发送的协议数据单元数据包的 POLL标 志位并发送此数据包, 在系统设定的时间内未收到接收端的应答, 向接收端 重发所述协议数据单元数据包, 当重发次数达到系统设定的协议数据单元数 据包最大发送次数后, 而且在系统设定时间内仍未收到所述接收端的应答。 上述方法还可具有以下特点: 所述无线链路层状态包最大发送次数大于所述协议数据单元数据包最大 发送次数。 上述方法还可具有以下特点: 在向接收端重发所述协议数据单元数据包的步骤中, 使用最后一次发送 的协议数据单元数据包中重发次数标志位对发送所述协议数据单元数据包的 次数进行计数; 在向接收端重发所述无线链路层状态包的步骤中, 设置独立的计数器对 发送所述无线链路层状态包的次数进行计数。 为了解决上述技术问题,本发明提供一种无线链路层状态包的发送装置, 应用于通用陆地无线接入网, 所述发送装置包括发送检测模块, 发送模块、 接收检测模块和复位模块, 其中: 所述发送检测模块设置成: 检测到存在已发送未确认数据有待发送时, 则告知发送模块; 所述发送模块设置成: 根据所述发送检测模块的检测结果, 所述向接收 端发送无线链路层状态包; 所述接收检测模块设置成: 若所述发送模块发出无线链路层状态包后, 未收到接收端的响应, 则指示复位模块进行无线链路层的复位操作; 所述复位模块设置成: 根据所述接收检测模块的指示, 进行无线链路层 的复位操作。 上述发送装置还可具有以下特点: 所述发送检测模块还设置成: 检测到存在已发送未确认数据有待发送, 检测到无线链路层配置了变长协议数据单元时, 告知所述发送模块; 所述发送模块还设置成: 若发送检测模块检测到存在已发送未确认数据 有待发送, 检测到无线链路层配置了变长协议数据单元时, 则向接收端发送 超字段探询状态包。 上述发送装置还可具有以下特点: 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后的系统设定时间内未收到接收端的应答, 则指示复位模块进行无线链路 层的复位操作。 上述发送装置还可具有以下特点: 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后, 在系统设定的时间内未收到接收端的应答时, 向接收端重发所述无线 链路层状态包, 重发次数达到系统设置的最大发送次数, 而且在系统设定时 间内仍未收到所述接收端的应答, 则指示复位模块进行无线链路层的复位操 作。 上述发送装置还可具有以下特点: 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后, 在系统设定的时间内未收到接收端的应答, 向接收端重发所述无线链 路层状态包,当重发次数达到系统设定的无线链路层状态包最大发送次数后, 激活最后一次发送的协议数据单元数据包的 POLL标志位并发送此数据包, 在系统设定的时间内未收到接收端的应答, 向接收端重发所述协议数据单元 数据包, 当重发次数达到系统设定的协议数据单元数据包最大发送次数后, 而且在系统设定时间内仍未收到所述接收端的应答, 则指示复位模块进行无 线链路层的复位操作。
釆用本发明的方法, 在 UTRAN与接收端间通路故障或无效时, 及时进 行 RLC复位, 有利于保持系统的稳定性和自恢复性。
附图概述 图 1是实施例中无线链路层状态包的发送方法流程图; 图 2是实施例一中无线链路层状态包的发送方法流程图; 图 3是实施例二中无线链路层状态包的发送方法流程图; 图 4是实施例四中无线链路层状态包的发送方法流程图。
本发明的较佳实施方式
如图 1所示, 无线链路层状态包的发送方法包括: 通用陆地无线接入网 检测到存在已发送未确认数据有待发送时, 向接收端发出无线链路层状态包 后, 未收到接收端的响应, 则进行无线链路层的复位操作。
实施例一: 如图 2所示, 无线链路层状态包的发送方法包括: 步骤 101 , 判断 POLL标志位的使用是否被禁止, 如果是, 则不需要激 活 POLL标志位, 正常发送 PDU数据包; 否则, 转到步骤 102; 步骤 102, 判断重发緩冲区中是否有待发数据, 如果是, 则激活重发緩 冲区中 PDU数据包的 POLL标志位并发送此 PDU数据包; 否则, 转到步骤 103; 步骤 103 , 判断待发緩冲区中是否有待发数据, 如果是, 则激活待发緩 冲区中 PDU数据包的 POLL标志位并发送此 PDU数据包; 否则, 转到步骤 104; 步骤 104, 判断已发送緩冲区中是否有已发送并未确认的数据, 如果是, 转步骤 105; 否则, 流程结束; 步骤 105 , 判断无线链路层是否配置了变长协议数据单元, 如果是, 则 执行步骤 106; 否则, 转到步骤 107; 步骤 106,发送 POLL— SUFI状态包, POLL— SUFI状态包的序列号为 VT ( S ) -1 , 即对应于最后一次发送的数据包的序列号; 并转到步骤 108; 步骤 107, 激活序列为 VT(S)-1的 PDU数据包的 POLL标志位并发送; 并转到步骤 108; 步骤 108, 如果在系统设定时间内未收到接收端的响应, 则进行无线链 路层的复位操作; 流程结束。 上述实施例一中, 发送一次 POLL— SUFI状态包或激活 POLL标志位的 序列为 VT(S)-1的 PDU数据包后, 在系统设定时间内未收到接收端的响应, 则进行无线链路层的复位操作。
实施例二: 由 UTRAN设置最大发送次数,在发出 POLL— SUFI状态包或激活 POLL 标志位的序列为 VT(S)-1的 PDU数据包后,在系统设定的时间内未收到接收 端的应答时, 向接收端重发此 POLL— SUFI状态包或激活 POLL标志位的序 列为 VT(S)-1的 PDU数据包, 当重发次数达到所述最大发送次数, 而且在系 统设定的时间内仍未收到接收端的应答时, 进行无线链路层的复位操作。 如 图 3所示, 具体包括以下步骤: 实施例二中步骤 201至 207与实施例一中步骤 101至 107相同; 步骤 208 , 在系统设定时间内未收到接收端的响应; 步骤 209 ,判断 POLL— SUFI状态包或激活 POLL标志位的序列为 VT(S)-1 的 PDU数据包的发送次数是否达到系统设定的最大发送次数,如果是,转到 步骤 210; 否则, 继续重发; 对重发次数进行计数时,使用最后一次发送的 PDU数据包的重发次数标 志位即 VT ( DAT ) , 每重发一次将此 PDU数据包的 VT ( DAT ) 的值加 1。 步骤 210, 进行无线链路层的复位操作; 流程结束。 不同于实施例一, 实施例二对 POLL— SUFI状态包或激活 POLL标志位 的序列为 VT(S)-1的 PDU数据包进行多次发送,均未能收到接收端的响应时, 再进行无线链路层的复位操作, 延长接收端返回响应的容许时间。
实施例三: 实施例三的流程与实施例二基本相同, 不同之处是, 可以分别为 POLL— SUFI状态包和激活 POLL标志位的序列为 VT(S)-1的 PDU数据包设 置不同的最大发送次数, 为 POLL— SUFI状态包设置新的计数器, 例如 VT ( POLL ) , 每重发一次 POLL_SUFI状态包, VT ( POLL ) 的值加 1。 序列 为 VT(S)-1的 PDU数据包仍然使用 VT ( DAT ) 。
实施例四: 实施例四中考虑到了不支持 POLL— SUFI 状态包的接收端, 发送多次 POLL— SUFI状态包后,未收到响应,有可能是因为接收端不支持 POLL— SUFI 状态包。 如图 4所示, 实施例四中具体包括以下步骤: 实施例四中步骤 401至 404与实施例一中步骤 101至 104相同; 步骤 405 , 判断无线链路层是否配置了变长协议数据单元, 如果是, 则 执行步骤 406; 否则, 转到步骤 409; 步骤 406,发送 POLL— SUFI状态包, POLL— SUFI状态包的序列号为 VT ( S ) -1 , 即对应于最后一次发送的数据包的序列号; 步骤 407, 在系统设定时间内未收到接收端的响应; 步骤 408 , 判断 POLL— SUFI 状态包的发送次数是否达到系统为 POLL— SUFI状态包设置的 POLL— SUFI状态包最大发送次数, 如果是, 转到 步骤 409; 否则, 转到步骤 406, 重新发送; 步骤 409, 激活序列为 VT(S)-1的 PDU数据包的 POLL标志位并发送; 步骤 410 , 在系统设定时间内未收到接收端的响应; 步骤 411 , 判断激活 POLL标志的序列为 VT(S)-1的 PDU数据包的发送 次数是否达到系统为 PDU数据包设置的 PDU数据包最大发送次数,如果是, 转到步骤 412; 否则, 转到步骤 409, 重新发送; 此步骤中的 PDU数据包最大发送次数的值与步骤 408中的 POLL— SUFI 状态包最大发送次数的值不相同。 一般情况下, PDU数据包最大发送次数 的值大于 POLL— SUFI状态包最大发送次数的值, 有利于节省判断时间, 尽 快判断出接收端是否支持 POLL— SUFI状态包。 步骤 412, 进行无线链路层的复位操作, 流程结束。 实施例四中, 对重发次数的计数方式可釆用与实施例三中相同的计数方 式。 综上, 本发明实施例的无线链路层状态包的发送装置, 应用于通用陆地 无线接入网, 包括发送检测模块, 发送模块、 接收检测模块和复位模块, 其 中:
所述发送检测模块设置成: 检测到存在已发送未确认数据有待发送时, 则告知发送模块; 所述发送模块设置成: 根据所述发送检测模块的检测结果, 所述向接收 端发送无线链路层状态包; 所述接收检测模块设置成: 若所述发送模块发出无线链路层状态包后, 未收到接收端的响应, 则指示复位模块进行无线链路层的复位操作; 所述复位模块设置成: 根据所述接收检测模块的指示, 进行无线链路层 的复位操作。 所述发送检测模块还设置成: 检测到存在已发送未确认数据有待发送, 检测到无线链路层配置了变长协议数据单元时, 告知所述发送模块; 所述发 送模块还设置成: 若发送检测模块检测到存在已发送未确认数据有待发送, 检测到无线链路层配置了变长协议数据单元时, 则向接收端发送超字段探询 状态包。 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后的系统设定时间内未收到接收端的应答, 则指示复位模块进行无线链路 层的复位操作。 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后, 在系统设定的时间内未收到接收端的应答时, 向接收端重发所述无线 链路层状态包, 重发次数达到系统设置的最大发送次数, 而且在系统设定时 间内仍未收到所述接收端的应答, 则指示复位模块进行无线链路层的复位操 作。 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后, 在系统设定的时间内未收到接收端的应答, 向接收端重发所述无线链 路层状态包,当重发次数达到系统设定的无线链路层状态包最大发送次数后, 激活最后一次发送的协议数据单元数据包的 POLL标志位并发送此数据包, 在系统设定的时间内未收到接收端的应答, 向接收端重发所述协议数据单元 数据包, 当重发次数达到系统设定的协议数据单元数据包最大发送次数后, 而且在系统设定时间内仍未收到所述接收端的应答, 则指示复位模块进行无 线链路层的复位操作。
釆用上述方法,在 UTRAN与接收端间通路故障或无效时,及时进行 RLC 复位, 有利于保持系统的稳定性和自恢复性。 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 本发明提供一种无线链路层状态包的发送方法和装置, 在 UTRAN与接 收端间通路故障或无效时,及时进行 RLC复位,有利于保持系统的稳定性和 自恢复性。

Claims

权 利 要 求 书
1、 一种无线链路层状态包的发送方法, 包括: 通用陆地无线接入网检测到存在已发送未确认数据有待发送时, 向接收 端发出无线链路层状态包后未收到接收端的响应, 则进行无线链路层的复位 操作。
2、 如权利要求 1所述的方法, 其中: 在所述通用陆地无线接入网检测到存在已发送未确认中数据有待发送 后, 还包括: 检测无线链路层是否配置了变长协议数据单元; 如果检测到无线链路层配置了变长协议数据单元时, 向接收端发出的无 线链路层状态包为超字段探询状态包。
3、 如权利要求 2所述的方法, 其中: 所述未收到接收端的响应是指, 在所述通用陆地无线接入网发出所述无 线链路层状态包后的系统设定时间内未收到接收端的应答。
4、 如权利要求 2所述的方法, 其中: 所述未收到接收端的响应是指, 在所述通用陆地无线接入网发出所述无 线链路层状态包后, 在系统设定的时间内未收到接收端的应答时, 向接收端 重发所述无线链路层状态包, 重发次数达到系统设置的最大发送次数, 而且 在系统设定时间内仍未收到所述接收端的应答。
5、如权利要求 4所述的方法,在通用陆地无线接入网检测到存在已发送 未确认有数据有待发送后, 通用陆地无线接入网检测到无线链路层未配置变 长协议数据单元时, 所述方法还包括: 激活最后一次发送的协议数据单元数据包的探询标志位并发送此协议数 据单元数据包, 在系统设定的时间内未收到接收端的应答时, 向接收端重发 所述协议数据单元数据包, 重发次数达到系统设置的最大发送次数, 而且在 系统设定时间内仍未收到所述接收端的应答时,进行无线链路层的复位操作。
6、 如权利要求 4所述的方法, 其中: 在向接收端重发所述无线链路层状态包的步骤中, 使用最后一次发送的 协议数据单元数据包中重发次数标志位对发送所述无线链路层状态包的次数 进行计数。
7、 如权利要求 5所述的方法, 其中: 所述无线链路层状态包的最大发送次数的值与所述协议数据单元数据包 最大发送次数的值不相同。
8、 如权利要求 2所述的方法, 其中: 所述未收到接收端的响应是指, 所述通用陆地无线接入网向接收端发出 所述无线链路层状态包后, 在系统设定的时间内未收到接收端的应答, 向接 收端重发所述无线链路层状态包, 当重发次数达到系统设定的无线链路层状 态包最大发送次数后, 激活最后一次发送的协议数据单元数据包的 POLL标 志位并发送此数据包, 在系统设定的时间内未收到接收端的应答, 向接收端 重发所述协议数据单元数据包, 当重发次数达到系统设定的协议数据单元数 据包最大发送次数后, 而且在系统设定时间内仍未收到所述接收端的应答。
9、 如权利要求 8所述的方法, 其中: 所述无线链路层状态包最大发送次数大于所述协议数据单元数据包最大 发送次数。
10、 如权利要求 5或 7或 8或 9所述的方法, 其中: 在向接收端重发所述协议数据单元数据包的步骤中, 使用最后一次发送 的协议数据单元数据包中重发次数标志位对发送所述协议数据单元数据包的 次数进行计数; 在向接收端重发所述无线链路层状态包的步骤中, 设置独立的计数器对 发送所述无线链路层状态包的次数进行计数。
11、 一种无线链路层状态包的发送装置, 应用于通用陆地无线接入网, 所述发送装置包括发送检测模块, 发送模块、 接收检测模块和复位模块, 其 中:
所述发送检测模块设置成: 检测到存在已发送未确认数据有待发送时, 则告知发送模块; 所述发送模块设置成: 根据所述发送检测模块的检测结果, 所述向接收 端发送无线链路层状态包; 所述接收检测模块设置成: 若所述发送模块发出无线链路层状态包后, 未收到接收端的响应, 则指示复位模块进行无线链路层的复位操作; 所述复位模块设置成: 根据所述接收检测模块的指示, 进行无线链路层 的复位操作。
12、 如权利要求 11所述的发送装置, 其中: 所述发送检测模块还设置成: 检测到存在已发送未确认数据有待发送, 检测到无线链路层配置了变长协议数据单元时, 告知所述发送模块; 所述发送模块还设置成: 若发送检测模块检测到存在已发送未确认数据 有待发送, 检测到无线链路层配置了变长协议数据单元时, 则向接收端发送 超字段探询状态包。
13、 如权利要求 12所述的发送装置, 其中: 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后的系统设定时间内未收到接收端的应答, 则指示复位模块进行无线链路 层的复位操作。
14、 如权利要求 12所述的发送装置, 其中: 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后, 在系统设定的时间内未收到接收端的应答时, 向接收端重发所述无线 链路层状态包, 重发次数达到系统设置的最大发送次数, 而且在系统设定时 间内仍未收到所述接收端的应答, 则指示复位模块进行无线链路层的复位操 作。
15、 如权利要求 12所述的发送装置, 其中: 所述接收检测模块还设置成: 在所述发送模块发出所述无线链路层状态 包后, 在系统设定的时间内未收到接收端的应答, 向接收端重发所述无线链 路层状态包,当重发次数达到系统设定的无线链路层状态包最大发送次数后, 激活最后一次发送的协议数据单元数据包的 POLL标志位并发送此数据包, 在系统设定的时间内未收到接收端的应答, 向接收端重发所述协议数据单元 数据包, 当重发次数达到系统设定的协议数据单元数据包最大发送次数后, 而且在系统设定时间内仍未收到所述接收端的应答, 则指示复位模块进行无 线链路层的复位操作。
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