Multi-address access method according to requirement

An access method and a technology for accessing time slots, which are applied to data exchange through path configuration, digital transmission systems, electrical components, etc., can solve problems such as waste of control overhead, reduce discard rate, reduce average message delay, Guarantee the effect of service quality

Inactive Publication Date: 2007-12-19
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the collision-free method can avoid the occurrence of packet collision, when many nodes do not send, this method will waste a lot of control overhead
[0007] In a mobile distributed wireless network, in addition to improving the utilization of network channels, it is also necessary to ensure that different types of services are distinguished and priority is given to real-time services relative to data services, and at the same time adjust the fairness between real-time services and ensure that QoS for most or all real-time services, but the existing multiple access methods do not solve the above problems well

Method used

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  • Multi-address access method according to requirement
  • Multi-address access method according to requirement
  • Multi-address access method according to requirement

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Embodiment Construction

[0043] Fig. 1 is the flowchart of the on-demand multiple access method of some embodiments of the present invention, as shown in Fig. 1, this method comprises the following steps:

[0044] Step 1: The group leader decides the number of reserved access slots and publishes them;

[0045] Step 2: Nodes with packets to send select reserved access slots to compete for access;

[0046] Step 3: Determine whether the node is successfully connected, if successful, perform step 4, if not successful, perform step 1;

[0047] Step 4: Execute the polling service;

[0048] Step 5: Determine whether the polled node has group accumulation, if there is group accumulation, then perform step 4; if there is no group accumulation, then perform step 6;

[0049] Step 6: Exit the polling service.

[0050]In the above step 2, if the node has a packet to send (that is, it will become active), it is necessary to determine whether the node has registered in the group, if not, send a self-organized pac...

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Abstract

This invention relates to a method for accessing multiple addresses according to the needs including: a group head decides a number of reserving accessing time slots and publishes it, the nodes sent in packet compete for reserved access in each frame reserved access time slot and nodes accessed successfully enter into a poll service stage, and those unsuccessfully engaged enter into the stage of reserved access for avoiding conflict and resolving to increase throughput of channels and reduce mean message time delay and lost rate.

Description

technical field [0001] The invention relates to an on-demand multiple access method, in particular to an on-demand multiple access method used in a mobile distributed wireless network; it belongs to the field of mobile communication. Background technique [0002] A mobile distributed wireless network is an ad hoc wireless network composed of several mobile nodes that does not require fixed infrastructure support. One of its key design problems is the problem of multiple access, that is, the problem of multiple users sharing common channel resources. The quality of the multiple access method directly affects the use efficiency of extremely limited wireless resources. Therefore, the media access control must ensure the maximum transmission of services under certain conditions and try to ensure the quality of service (QoS) of multimedia services. [0003] Multiple access control methods are mainly divided into three types: fixed (static), random, and reservation control, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/28H04L12/403H04L47/2416
Inventor 张军刘凯黄雁
Owner BEIHANG UNIV
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