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Channel reservation based power control method in distributed wireless networks

A wireless network and channel reservation technology, applied in wireless communication, power management, electrical components, etc., can solve problems such as power control strategy without channel reservation mechanism

Inactive Publication Date: 2014-12-31
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current related researches all use the contention-based MAC protocol as the access strategy, and no power control strategy suitable for the channel reservation mechanism has been proposed.

Method used

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  • Channel reservation based power control method in distributed wireless networks
  • Channel reservation based power control method in distributed wireless networks
  • Channel reservation based power control method in distributed wireless networks

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Embodiment Construction

[0044] The present invention takes the basic channel reservation as the access mechanism. For the convenience of describing the content of this patent, the principle of the basic channel reservation mechanism is summarized below, and then the technical principle of the invention content of the present patent is given.

[0045] Basic channel reservation:

[0046] When the channel reservation is not performed, the node accesses the channel in the contention mode (ie IEEE 802.11DCF mode), and the handshake mode is RTS-CTS-DATA-ACK. If the last handshake is successful, subsequent packets access the channel in reservation mode, and the handshake mode is DATA-ACK. If the handshake fails in the reservation mode, switch back to the contention mode to access the channel, and then switch to the reservation mode until the handshake is successful.

[0047] Channel reservation is initiated by the sender of DATA and ACK, and the DATA and ACK carry the CRI of the sender of the packet. By...

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Abstract

The invention provides a channel reservation based power control method in distributed wireless networks. According to the power control method, basic channel reservation serves as an access mechanism. The power control method includes: computing relevant parameters of a channel model (two-way model), then performing power control aiming at the three conditions: 1, in a competitive mode, a sending end S competes a channel successfully (a query result in a reservation table is true) and prepares to send an RTS (request to send) to a receiving end R; 2, in a reservation mode, the S prepares to send DATA to the receiving end R; and 3, a neighbor node N intercepts the DATA or ACK (acknowledge characters). By the aid of the channel reservation based power control method in the distributed wireless networks, channel multiplexing ratio is increased, network capacity is increased, energy consumption efficiency of the node is improved, life cycle of the networks is prolonged, channel access quality of real-time services is enhanced, and grouping delay jitter is reduced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a real-time service transmission method. Background technique [0002] A wireless self-organizing network (Ad hoc network) is a wireless multi-hop network composed of a group of nodes of the same level. Each node has its own wireless transceiver device. The network does not contain any central control node and infrastructure, and each node has distributed access channels. . This kind of network has low construction cost, strong survivability, fast networking speed and wide application fields. [0003] With the continuous development of wireless network technology, the transmission of some services with special quality of service requirements in Ad hoc networks has gradually become a research hotspot, such as multimedia real-time services. Higher requirements. However, in the Ad hoc network, the nodes access the channel in a distributed random competition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W52/34
CPCY02B60/50
Inventor 李波袁韵洁闫中江
Owner NORTHWESTERN POLYTECHNICAL UNIV
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