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Frame retransmission method and apparatus for radio link protocol

A wireless link protocol, retransmission technology, applied in the communication between multiple stations, using the return channel for error prevention/detection, etc., can solve the problem of transmission rate drop, high RLP retransmission rate, increased RLP reset times, etc. problem, to achieve the effect of improving compatibility

Active Publication Date: 2009-07-22
ZTE CORP
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an RLP retransmission method and device to overcome the problems in the prior art that the RLP retransmission rate is high, the number of RLP resets increases, and the transmission rate decreases in an environment with large jitter

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  • Frame retransmission method and apparatus for radio link protocol
  • Frame retransmission method and apparatus for radio link protocol
  • Frame retransmission method and apparatus for radio link protocol

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Embodiment Construction

[0036] The present invention will be further introduced below in conjunction with the accompanying drawings and preferred embodiments.

[0037] Such as figure 1 As shown, the RLP frame retransmission device according to the present invention includes a receiving module, a control module, a delay buffer module, a reordering buffer module, a NAK list module and a sending module, wherein,

[0038] The receiving module is used to receive the RLP frame, extract L_SEQ and send it to the control module;

[0039] Control module is used for comparing the size of L_SEQ and L_V (R); For when L_SEQ is less than L_V (R), judge whether there is the sequence number identical with current L_SEQ in the described delay buffer area; For calculating the sequence number of lost frame; It is used to add the serial number of the lost frame to the delay buffer module or delete it from the delay module; it is used to discard the received frame or send it to the reordering buffer module; it is used to...

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Abstract

The invention relates to a wireless link protocol RLP frame retransmission method and apparatus, the method comprises following steps: a RLP layer preserves a lost frame sequence number in a time delay caching area, when the received frame sequence number L_SEQ is smaller than the expecting received lower frame sequence number, if no sequence number same as the L_SEQ is in the time delay caching area, so that the received frame in the present is discarded, the sequence number of the lost frame is calculated, and the corresponding sequence number can be preserved in the time delay caching area, meanwhile, the lost frame sequence number before the presetting value is inserted into a negative response NAK list, when the transmitting time is coming, the NAK is transmitted to the opposite terminal RLP layer, the lost frame is required for transmitting; the apparatus comprises a received module, a control module, a time delay caching module, a reordering caching module, an NAK list module and a transmitting module. The invention improves the compatibility of the RLP layer for various application scenes, can ensure that the RLP layer retransmission rate is low and the transmission rate of the RLP layer is constant under the condition of large shake.

Description

technical field [0001] The present invention relates to the field of wireless data communication, in particular to a radio link protocol (Radio Link Protocol, RLP) frame retransmission method and device in a code division multiple access (Code Division Multiple Access, CDMA) communication system. Background technique [0002] Wireless communication system has gradually become one of the most widely used means of communication. These systems may be communication multiple access systems that can support multiple users and provide multiple types of services, including frequency division multiple access (Frequency Division Multiple Access, FDMA), time division multiple access (Time Division Multiple Access, TDMA), CDMA or are other multiple access techniques. The CDMA system attracts the attention of users by virtue of its high capacity, high efficiency, low cost and other characteristics. [0003] Since the wireless environment is greatly affected by the outside world, the fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04B7/26
Inventor 张懿谢碧峰
Owner ZTE CORP
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