A multi-priority voice access method in ad Hoc radio network

A multi-priority and priority technology, applied in network topology, network traffic/resource management, electrical components, etc., can solve problems such as voice collision, channel occupation by low-priority services, and access status update, so as to avoid collision, Improve the success rate and stability, and solve the hidden terminal problem

Active Publication Date: 2011-11-30
GUANGZHOU HAIGE COMM GRP INC
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AI Technical Summary

Problems solved by technology

[0004] In order to realize reliable and stable multi-priority voice services in the Ad Hoc radio network, three problems must be solved: the hidden terminal problem, the access status update problem caused by topology changes, and the voice time slot preemption problem
[0008] In the current Ad Hoc radio network, none of the above three problems can be solved, so there will be voice collisions resulting in voice interruption, and low priority services occupying the channel for a long time

Method used

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  • A multi-priority voice access method in ad Hoc radio network
  • A multi-priority voice access method in ad Hoc radio network
  • A multi-priority voice access method in ad Hoc radio network

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Embodiment Construction

[0032] Before describing the present invention, the basic modes of voice communication in the Ad hoc radio network are briefly introduced. The voice communication in the Ad hoc radio network is a high-real-time service. After pressing the PTT button, the call can be made. It adopts the broadcast mode and there is no dialing process. The nodes within one hop of the voice-emitting node can receive the voice. The communication mode is half-duplex, that is, a single node can only be a voice sender or a voice receiver at a certain moment.

[0033] Such as Figure 1 to Figure 5 Shown, realize multi-priority voice access method in the Ad hoc radio network of the present invention, comprise the following steps:

[0034] (1) Set the voice communication priority of each radio station, distribute the data time slots to each node equally, and then carry out synchronous networking to establish an Ad Hoc network. In the process of synchronous networking, a radio node is preset as the main s...

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Abstract

The invention discloses a method for realizing multi-priority voice services in an Ad Hoc radio station network. Its main feature is that the channel is divided according to time, and each time frame is divided into management time slots, voice time slots and data time slots. Voice traffic is sent only in voice slots. The voice time slot is not pre-allocated, and is used by all nodes in competition. Combined with the voice overriding command sent in the management time slot, the voice overriding announcement sent in the data time slot, and the voice time slot status announcement, multi-priority voice services are realized . It can effectively distinguish voice services of various priorities in the radio network, and at the same time solve the hidden terminal problem that may occur when sending voice and the access status update problem caused by rapid changes in network topology, effectively avoiding multiple users when voice slots collide, improving the success rate and stability of voice access.

Description

technical field [0001] The invention relates to the field of wireless network access, in particular to a method for realizing multi-priority voice services in an Ad Hoc radio network. Background technique [0002] Ad hoc network is a wireless, multi-hop self-organizing network. Nodes in the network can communicate with nodes outside the signal coverage by means of forwarding from other nodes. The network topology may be all-through network, chain network, complex network and other topological structures, and due to the mobility of nodes, nodes can join or exit the network at any time, and the network topology changes frequently. [0003] In the actual application of the Ad Hoc radio network, the voice service is very important. Compared with the general Ad Hoc network, the voice service of the Ad Hoc radio network has three characteristics: high real-time requirements, high reliability requirements, and half-duplex broadcast mode. Real-time requirements are high, so voice...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/24H04W40/22H04W84/18
Inventor 陈锐刘勇
Owner GUANGZHOU HAIGE COMM GRP INC
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