Congestion control method, wireless netted network node and system

A congestion control and node technology, applied in the communication field, can solve the problems of low-priority service packet loss, service packet loss, etc., and achieve the effects of reducing the packet loss rate, alleviating the degree of congestion, and improving resource utilization.

Inactive Publication Date: 2009-11-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] During the research and practice of the first prior art, the inventor found that there are at least the following problems in the first prior art: when performing rate control, only a simple Considering service priority, when there are multiple high-priority streaming media service streams competing for access, a large number of packets of low-priority services will be lost
[0006] During the research and practice of the second prior art, the inventor found at least the following problems in the second prior art: simply performing rate control or simply considering business Priority, when there are multiple high-priority streaming media service streams competing for access, it will cause a large number of packet loss for low-priority services

Method used

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  • Congestion control method, wireless netted network node and system
  • Congestion control method, wireless netted network node and system
  • Congestion control method, wireless netted network node and system

Examples

Experimental program
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Embodiment 1

[0031] see figure 1 , a flowchart of a congestion control method provided by an embodiment of the present invention, including:

[0032] S101: The downstream node detects local transmission conditions;

[0033] S102: The downstream node judges whether congestion occurs according to the detection result. If congestion occurs, go to step S103; otherwise, return to step S101; the way of judging congestion can refer to the prior art, and will not be repeated here.

[0034] S103: The downstream node determines the congestion price corresponding to the data of each access category according to the local transmission situation.

[0035] Wherein, according to the local transmission situation, the congestion price corresponding to each access category data can be obtained through the following relational expression, refer to formula 1:

[0036] λ i = P i × e ...

Embodiment 2

[0053] see figure 2 , is a schematic diagram of a congestion control device provided by an embodiment of the present invention, including:

[0054] The receiving unit 201 is configured to receive a congestion notification frame sent by a downstream node that carries a congestion price corresponding to each access type data; wherein, the congestion price corresponding to each access type data is determined by the downstream node according to each access of the downstream node The transmission status of the category data is determined; for example, for the congestion price corresponding to the data of the access category i, it can be realized by formula 1, and details can be referred to other embodiments of the present invention, which will not be repeated here;

[0055] A determining unit 202, configured to determine the optimal sending rate of each access category data according to the congestion price in the congestion notification frame received by the receiving unit 201; ...

Embodiment 3

[0066] see image 3 , is a schematic diagram of a congestion control device provided by an embodiment of the present invention, including:

[0067] a receiving unit 301, configured to receive data of each access category sent by an upstream node;

[0068] The price unit 302 is configured to determine the congestion price corresponding to each access type data according to the transmission situation of each access type data in the receiving unit 301; Formula 1 implementation;

[0069] The sending unit 303 is configured to include the congestion price determined by the price unit 302 in a congestion notification frame and send it to an upstream node.

[0070] Wherein, the price unit 302 includes:

[0071] The congestion determination unit 304 is configured to determine the congestion parameters of each access category data according to the actual ratio of each access category data to the total amount of data sent by the sending node and a preset ratio threshold; for example, ...

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Abstract

The invention discloses a congestion control method, a wireless netted network node and a system. The congestion control method comprises the following steps: receiving a congestion notification frame which is sent by a downstream node and carries the congestion price which corresponds to each access category data, wherein the congestion price which corresponds to each access category data is determined by the downstream node according to the transmission condition of each access category data of the downstream node; determining the optimized sending rate of each access category data according to the congestion price; and adjusting the sending rate of each access category data according to the optimized sending rate. Through the invention, the probability of congestion can be reduced, and the packet loss ratio of low priority traffic is effectively reduced on the basis of ensuring the quality of high priority traffic.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a congestion control method, a wireless mesh network node and a system. Background technique [0002] EDCA (Enhanced Distributed Channel Access) is the main access control technology of wireless Mesh (mesh) network. On the basis of strict priority mechanism, it implements congestion control for various services under a unified mechanism. When faced with the demands of real-time streaming media services, the EDCA mechanism encounters huge challenges. When the network bandwidth is close to saturation and there are multiple high-priority streaming media service streams competing for access, the EDCA mechanism will lead to a sharp deterioration of the network competition environment, a large number of packet losses, a decrease in throughput, and an increase in packet delay. [0003] Prior Art 1 proposes a congestion control strategy based on fuzzy logic control. This control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/00H04L12/44H04L12/801
Inventor 方旭明武昌盛冯丹凤
Owner HUAWEI TECH CO LTD
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