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Frame processing method and device in logic link control

A logical link control and frame processing technology, applied in the field of communication, can solve the problems of wasting air interface resources, I frame retransmission, etc., and achieve the effect of saving air interface resources

Active Publication Date: 2010-08-11
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will cause the data sender to mistakenly think that the I frame sent during the delay is also lost, causing the I frame sent during the delay to be retransmitted, wasting air interface resources

Method used

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  • Frame processing method and device in logic link control
  • Frame processing method and device in logic link control
  • Frame processing method and device in logic link control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1, the implementation of the present invention provides a frame processing method in logical link control, including:

[0045] 101: Receive the transmission confirmation frame sent by the data receiving end;

[0046] 102: Obtain an effective bitmap field in the bitmap field carried by the transmission confirmation frame, where the above-mentioned effective bitmap field is a field from the highest bit of 1 to the lowest bit in the bitmap field;

[0047] The implementation method of the above-mentioned 102 can be: read from the high bit to the low bit of the bitmap of the above-mentioned sending confirmation frame in sequence, and when the bit that is 1 is read, it is determined that the above-mentioned bit that is 1 and the bit below the above-mentioned bit that is 1 are valid bitmap field. The above example of 102 implementation is not the only way to confirm that the first bit of the high bit of the bitmap is 1. For example, it can also be read from the low...

Embodiment 2

[0068] Embodiment two, such as image 3 As shown, the embodiment of the present invention provides a frame processing device in logical link control, including:

[0069] A transmission confirmation frame receiving unit 301, configured to receive a transmission confirmation frame sent by a data receiving end;

[0070] The bitmap confirming unit 302 is configured to obtain a valid bitmap field in the bitmap field carried by the transmission confirmation frame, the above-mentioned valid bitmap field is a field starting from the highest bit of 1 to the lowest bit in the bitmap field ;

[0071] The frame calculation unit 303 is configured to calculate the lost frame by using the above valid bitmap field.

[0072] Optionally, as in Figure 4 as shown,

[0073] The above-mentioned bitmap confirmation unit 302 includes: a first bitmap confirmation subunit 401, which is used to read sequentially from the high bit to the low bit of the bitmap of the above-mentioned transmission conf...

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Abstract

The embodiment of the invention discloses a frame processing method and a device in logic link control, wherein the method comprises the following steps: receiving a sending acknowledgement frame sent by a data receiving terminal; acquiring effective bitmap fields in bitmap fields carried by the sending acknowledgement frame, wherein the effective bitmap fields are fields from the most significant bit of 1 to the least significant bit in the bitmap fields; and computing missing frames through the effective bitmap fields. In the realization mode, the most significant bit of 1 of the bitmaps ofthe sending acknowledgement frame and the bits following the most significant bit are used as the effective bitmap fields, the missing frames are computed by the effective bitmaps, and the problem ofretransmission of an I frame sent in a delay period caused by computing the missing frames by redundant bits of 0 is avoided, thereby saving vacancy resources.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a frame processing method and device in logical link control. Background technique [0002] General Packet Radio Service (GPRS) provides wireless data transmission services for users, and Logical Link Control (LLC) belongs to the link layer protocol in the GPRS protocol stack. The LLC supports two data transmission modes: Asynchronous Disconnected Mode (ADM) and Asynchronous Balanced Mode (ABM). Among them, under ABM, the receiving end of the LLC layer needs to confirm the data sent by the sending end, and the sending end needs to retransmit the lost data according to the confirmation information of the receiving end. [0003] In the LLC ABM, the I frame is used for data transmission, and the S frame is used for data confirmation; among them, the parameter NS in the I frame header indicates the sequence number of the I frame at the sending end, and the parameter NR in the ...

Claims

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Application Information

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IPC IPC(8): H04L1/16
Inventor 张稚彬王蓉
Owner HUAWEI DEVICE CO LTD