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Multi-address access method for supporting service quality

An access method and quality of service technology, applied in the field of multi-access access that supports quality of service, can solve problems such as hindering high-priority service startup and restricting QoS performance, and achieve simple transceiver equipment requirements and ensure conflict-free transmission , reduce the effect of group collision

Inactive Publication Date: 2009-06-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the CSMA / CA-based access mechanism 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 transmission of low-priority services that are being alternately carried out in adjacent nodes may It hinders the start of high-priority services, and the RTS / CTS handshake without 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 supporting service quality
  • Multi-address access method for supporting service quality
  • Multi-address access method for supporting service quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 It is a flow chart of Embodiment 1 of the multiple access method supporting quality of service in the present invention, as shown in figure 1 As shown, it specifically includes the following steps:

[0024] Step 1. The node judges the service type according to the service group to be sent. If it is a real-time service, the node sends an FB packet declaring the real-time service type. Packet length, the above-mentioned nodes enter the competition stage, and perform step 2; if it is a non-real-time service, the node continues to listen to a mini-slot of the FB packet length, if it does not hear the FB packet declaring the real-time service type sent by the real-time service node , the above-mentioned nodes enter the competition stage and execute step 2;

[0025] Wherein, the above competition stage is a stage before the node obtains the channel access right, and in this stage, the node sends one or more FB packets to obtain the channel access right. After the ...

Embodiment 2

[0033] Such as figure 2 As shown, it is a flow chart of embodiment 2 of the multiple access method supporting quality of service of the present invention. Compared with the previous embodiment, it also includes before step 1:

[0034] Step 0. When a node has a service and needs to access the channel, the node first monitors the channel for a window time, and judges whether the channel is in an idle state at this time. If the channel is in an idle state during the listening window time, then perform step 1; If the channel is busy within the listening window, the node repeats step 0.

[0035] Compared with the previous embodiment, the return step 1 in steps 2 and 3 is replaced by return step 0; in step 3, it is judged whether the channel is in an idle state at this time by listening to a mini-slot of the channel . In addition, compared with the previous embodiment, the following steps are also included after step 4:

[0036] Step 5, wait to receive the message of feedback ac...

Embodiment 3

[0040] image 3 It is a flow chart of Embodiment 3 of the multiple access method supporting quality of service in the present invention, as shown in image 3 As shown, it specifically includes the following steps:

[0041] Step 1. Nodes with real-time services and non-real-time services are distinguished by statements: before the node accesses the channel, it listens to the channel for a window time Twin. If the channel is idle within this time, the node judges the service type according to the service group to be sent, that is, , the nodes (real-time service nodes) that have real-time service packets to be sent are at T win Immediately after being idle, send a FB packet declaring the business type and enter the competition stage; the nodes (non-real-time business nodes) that have non-real-time business packets to be sent are in T win Continue to listen to a micro-slot of FB length after being idle. If there is no statement from a real-time service node, the non-real-time se...

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Abstract

The method comprises: according to the service packet to be transmitted, the node estimates the service type; if it is a real-time service, the node sends a predicted burst-out of declaring service type, and enters the next step; if it is a non real-time service, the node monitors a micro time slot in one predicted burst-out length; if not detecting a predicated burst-out of declaring the real-time service, then entering the next step; the node determines the beginning micro time slot of the predicted burst-out, and the numbers of the transmitted predicted burst-out packet, and decide if the monitor channel is at idle state before the beginning micro time slot; if yes, the node sends one or more predicted burst-out, and then decides if the channel is at idle state; if yes, the node accesses the channel and sends service packet.

Description

technical field [0001] The invention relates to a multiple access method supporting quality of service, in particular to a multiple access method supporting quality of service relying on declarations to differentiate service types. Background technique [0002] Multiple access is a method to solve how multiple nodes or users share channel resources quickly, efficiently, fairly and reliably. According to channel allocation methods, multiple access methods can generally be divided into three types: 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, which is not sui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/24H04L12/56H04W74/00
Inventor 张军刘凯王大鹏
Owner BEIHANG UNIV
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