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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: 2009-07-29
BEIHANG UNIV
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  • Description
  • Claims
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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] see figure 1 , which is a flow chart of the multiple access method for ensuring quality of service in the present invention, specifically:

[0028] Step 101, after the listening channel is idle, the node selects the mini-slot for forecasting the start of the burst;

[0029] Step 102, monitor several mini-slots before the start mini-slot of the forecast burst, if idle, execute step 103; otherwise, execute step 101;

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

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

[0032] Step 105, sending service packets.

[0033] The embodiment of the present invention separates the contention access from the service packet transmission, and uses the conflict resolution mechanism of predicting bursts during the contention period, so that the nodes can quickly and effec...

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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 invention relates to a multiple access method for ensuring service quality, in particular to a multiple access method capable of conflict resolution. Background technique [0002] The multiple access (ie, Medium Access Control, hereinafter referred to as MAC) method solves the problem of multiple nodes or users sharing channel resources quickly, efficiently, fairly and reliably. According to the way of channel allocation, multiple access methods are generally divided into three ways: 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 the business of each node is mostly bursty business, the multiple access method of fixed allocation will cause a lot of channel resources to be idle and waste, whi...

Claims

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Application Information

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