Method for controlling radio link control layer buffer area overflow

Abstract

This invention relates to a kind of controlling method for overflow of the wireless link controlling layer buffer area. It concludes: A, RLC buffer area threshold value is preset. The value of Bo is initialized to 0; B, RLC pre-sectors the received SDU and calculates current Bo value according to the consequence; C, if the Bo of RLC is smaller than the threshold value of buffer area, RLC functional process will be undertaken. MAC functional process will be undertaken afterwards; if the Bo of RLC is not smaller than the threshold value of buffer area, SDU will be deleted. Bo value is renewed. MAC functional process is undertaken too. This invention also relates to another kind of controlling method, which is different from the above method at the following points: the received SDU is not pre-sectored. RLC functional process is undertaken directly; the first PDU, which has not SDU transmitting labeled, is researched. All PDU of the SDU are deleted. The other steps are the same as above method.

Description

technical field [0001] The invention relates to the field of communications, in particular to a method for controlling buffer overflow of a radio link control layer Background technique [0002] With the development of communication technology, especially the development of 3G technology, data service will become one of the important business of mobile communication system. This wireless data service will provide end users with a seamless connection to the Internet, allowing users to obtain more convenient information through the wireless system. And the existing Internet network mainly through TCP / IP to carry on the network and complete the data transmission. [0003] The Transmission Control Protocol (TCP, Transmit Control Protocol) is a reliable transmission technology, and the transmission performance of the Transmission Control Protocol TCP in the existing wired network is guaranteed by adopting methods such as slow start, congestion avoidance and fast recovery. The i...

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Problems solved by technology

[0013] Therefore, as can be seen from the above-mentioned disclosed methods, the disadvantages are: due to the TCP slow start effect, multiple TCP packets will arrive at the buffer of the RLC layer at the same time, so the timers of these SDUs will start at the same time

Due to the in-order transmission mechanism of the wireless network, once one SDU times out, the discarding timer of all subsequent SDUs in this batch will time out. At this time, the SDUs are collectively discarded, which will cause no data to be sent by the RLC layer and reduce the RLC rate. Throughput, which affects the quality of service between end-to-end

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