Method, device and system for transmitting data

A data transmission method and data packet technology, which are applied in the fields of data transmission methods, devices and systems, can solve the problems of data packet jitter and the delay in data packet delivery, and achieve the effects of reducing jitter, reducing delivery delay and reducing time.

Active Publication Date: 2013-12-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This results in a longer delivery delay for this part of the data packet. In addition, the longer the delivery delay of the data packet, the more serious the jitter of the data packet during transmission.

Method used

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  • Method, device and system for transmitting data
  • Method, device and system for transmitting data
  • Method, device and system for transmitting data

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Embodiment Construction

[0026] In order to enable those skilled in the art to better understand the solution of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation manners.

[0027] In the data transmission method, device and system of the embodiment of the present invention, after the receiving end finds that the data packets are out of order, firstly, adjust the lower limit value of the original receiving window so that the adjusted lower limit value of the current receiving window is not less than the lower limit value of the original receiving window Limit value, in order to reduce the waiting time for receiving data packets; Then, update the lower limit value of the original receiving window to the breakpoint value, to clarify the data packets that need to be reordered and delivered to the receiving layer; finally, set the packet sequence number less than the breakpoint value The...

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Abstract

The invention provides a method, a device and a system for transmitting data. The method includes adjusting a lower limit value of an original receiving window by the aid of the size of a preset reordering window to obtain a lower limit value of a current receiving window; comparing the lower limit value of the current receiving window to the lower limit value of the original receiving window, and updating the lower limit value of the original receiving window as a breakpoint value if the lower limit value of the current receiving window is larger than the lower limit value of the original receiving window; transmitting a data packet with a packet sequence number smaller than the breakpoint value to a receiving layer. The lower limit value of the original receiving window is a packet sequence number of a next data packet which is expected to be received by the receiving end. The breakpoint value is a packet sequence number of a first data packet which is not received, and the packet sequence number is not smaller than the lower limit value of the current receiving window. The method, the device and the system in an embodiment of the invention have the advantages that the purpose of shortening the data packet submission delay can be achieved, and jittering of the data packets in transmission procedures further can be reduced.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a data transmission method, device and system. Background technique [0002] In the existing LTE (Long Term Evolution, Long Term Evolution) air interface transmission technology, there are two transmission modes at the RLC (Radio Link Control, Radio Link Control) layer, which are Acknowledged Mode (AM) and Unacknowledged Mode (Unacknowledged Mode, UM). For the RLC UM transmission mode, the sending end is only responsible for sending the data packet to the receiving end, and the receiving end does not need to further confirm and feed back the data packet reception to the sending end. That is to say, no matter whether the receiving end successfully receives the data packet, the sending end will not resend the data packet. [0003] For the receiver in the RLC UM transmission mode, although it is not necessary to ensure reliable reception of data packets, it is ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16
CPCH04L47/27H04L47/34
Inventor 韩广林张戬
Owner HUAWEI TECH CO LTD
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