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Multi-address access method for service quality guarantee

An access method and a quality of service technology, applied in the multi-access field where conflict resolution can be performed, can solve problems such as restricting the QoS performance of real-time services, hindering the initiation of high-priority services, etc., to improve throughput, reduce collision probability, collision avoidance effect

Inactive Publication Date: 2008-01-09
BEIHANG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the access mechanism based on carrier sense multiple access is applied to a multi-hop network, it is difficult to ensure that the delay of all high-priority services is limited to a small range, because the low-priority services that are constantly alternating in adjacent nodes The transmission may hinder the initiation of high-priority services, and the send request / clear request handshake with no start time limit also restricts the QoS performance of real-time services in multi-hop networks

Method used

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  • Multi-address access method for service quality guarantee
  • Multi-address access method for service quality guarantee
  • Multi-address access method for service quality guarantee

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Embodiment Construction

[0027] Refer to Fig. 1, which is a flowchart of a multiple access method for guaranteeing service quality according to the present invention, which is specifically:

[0028] Step 101: After the listening channel is idle, the node selects the pre-burst start mini-slot;

[0029] Step 102: Monitor several mini-slots before the start mini-slot of the forecast burst, if it is free, go to step 103; otherwise, go to step 101;

[0030] Step 103: Send one or more forecast burst packets starting from the forecast burst start mini-slot;

[0031]Step 104: Listen to the channel time slot, if no other forecast burst packets are received, go to step 105; otherwise, go to step 101;

[0032] Step 105: Send the service packet.

[0033] The embodiment of the present invention separates the contention access and the service packet transmission, and utilizes the conflict resolution mechanism of predicting the burst during the contention period, so that the node can quickly and effectively access the c...

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Abstract

The invention is concerned with the multiple address accessing method, it includes: selecting the forecast outburst launching time slot during the interception channel in spare; monitoring the some micro-time slots before the forecast outburst launching time slot, it is available, transmits one or more of the forecast outburst grouping begin with it, otherwise, repeating the first step; the interception channel time slot transmit the operation grouping if no other forecast outburst grouping received, otherwise, repeating the first step. The invention improves the speed of the channel connection, the throughput volume of the net and reduces the collision ratio, the grouping delay, and insures the fairness.

Description

Technical field [0001] The present invention relates to a multiple access method for guaranteeing service quality, in particular to a multiple access method capable of conflict resolution. Background technique [0002] The multiple access (Medium Access Control, hereinafter referred to as MAC) method solves the problem that multiple nodes or users quickly, efficiently, fairly and reliably share channel resources. According to the channel allocation method, multiple access methods are usually divided into three methods: fixed allocation, random access and on-demand allocation. [0003] The fixed allocation multiple access method generally allocates channel resources to some nodes or all nodes that share the channel for a long time. Since there are a large number of mobile nodes in various mobile communication networks, and most of the services of each node are mainly burst services, the fixed allocation of multiple access methods will cause a lot of channel resources to be idle an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/204H04J3/16
Inventor 刘凯张军王大鹏
Owner BEIHANG UNIV
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