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Transmission method of protocol data unit and system thereof

A protocol data unit and transmission method technology, applied in the field of protocol data unit transmission method and system, can solve the problems such as polling retransmission timer timing length and retransmission threshold limit, long duration, bad transmission conditions, etc. Achieve effective use of bandwidth, reduce delays, and improve the transmission environment

Active Publication Date: 2011-01-12
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a protocol data unit transmission method and system to solve the problem that the poor transmission status lasts for a long time due to the limitation of the timing duration of the polling retransmission timer and the retransmission threshold

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  • Transmission method of protocol data unit and system thereof
  • Transmission method of protocol data unit and system thereof
  • Transmission method of protocol data unit and system thereof

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Embodiment Construction

[0036] In the process of transmitting AMD PDUs in the prior art, after the polling retransmission timer expires, if the sending window is limited and a new AMD PDU cannot be sent to carry the poll, an AMD PDU that has not been positively confirmed will be resent to carry the poll. poll, the AMD PDU that has not been positively confirmed may have been received by the peer RLC entity, and the AMD PDU is retransmitted again, just to send a poll to the peer RLC entity, if it has not received the peer RLC entity. STATUS PDU, then the AMD PDU will be retransmitted multiple times, which greatly wastes bandwidth, and after a period of time from VT(S) to VT(MS) ((maxRetxThreshold+1)*polling retransmission timer duration ), the reconstruction process can be initiated, so there is a defect that it takes a long time to improve the transmission process.

[0037] In this embodiment, after sending the AMD PDU carrying poll, in the case that the polling retransmission timer expires, it is jud...

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Abstract

The invention discloses a transmission method of a protocol data unit (PDU) and a system thereof. The transmission method comprises the following steps: taking maximum send state variable VT (MS) as a top of a sending window for a radio link control (RLC) layer entity, starting a polling retransmission timer after sending the acknowledged mode data (AMD) PDU carrying poll, then judging whether the send state variable VT (S) of the sending window is equal to VT (MS) in the event that the polling retransmission timer is overtime, and if yes, informing a radio resource control layer of initiating link reconstruction. In the invention, when the polling retransmission timer is overtime, the RLC layer entity judges whether VT (S) is equal to VT (MS), and if yes, the PLC layer entity informs the radio resource control layer of initiating link reconstruction. Therefore, bandwidth is effectively utilized to a greater extent, delay for the reconstruction initiation process is reduced and severe transmission environment is improved timely without affecting the ARQ process.

Description

technical field [0001] The invention relates to the technical field of wireless digital communication, in particular to a method and system for transmitting a protocol data unit. Background technique [0002] The Radio Link Control (RLC) layer of the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (Evolved UMTS Terrestrial Radio Access Network, E-UTRAN) includes three types of RLC entity: Transparent Mode (Transparent Mode, TM), Unacknowledged Mode (Unacknowledged Mode, UM) and Acknowledged Mode (Acknowledged Mode, AM). Wherein, the AM RLC entity uses an automatic retransmission request (Automatic Retransmission Request, ARQ) mechanism to provide a reliable data transmission service. [0003] In the AM mode, the sending side of the RLC entity maintains a sending window according to the state variables VT(A) and VT(MS), and the absolute offset between VT(A) and VT(MS) is 512. When submitting a new Acknowledgment Mode Data Protocol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/04H04W76/02
CPCH04L1/187H04L1/1685H04L1/188H04L1/1822
Inventor 刘焕
Owner ZTE CORP
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