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Channel reservation method based on double busy tone mechanism in wireless self-organizing network

A wireless self-organizing network and channel reservation technology, applied in the field of communication, can solve problems such as unsuccessful transmission, packet conflict, reservation failure, etc., to overcome channel instability and hidden terminals, reduce real-time packet error frame rate, and improve reliability Effect

Inactive Publication Date: 2011-07-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

In a wireless network, due to the channel instability caused by channel fading and the packet collision caused by the hidden terminal problem unique to wireless networks, it is difficult for the packets in the wireless network to have relatively stable transmission. Therefore, for these channel reservation mechanisms, The packet carrying the reservation information is likely to be collided by other packets at the neighboring node, resulting in the failure of the reservation, which in turn leads to the inability to successfully transmit the next data packet transmission through the channel reservation

Method used

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  • Channel reservation method based on double busy tone mechanism in wireless self-organizing network
  • Channel reservation method based on double busy tone mechanism in wireless self-organizing network
  • Channel reservation method based on double busy tone mechanism in wireless self-organizing network

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Embodiment Construction

[0060] Generally speaking, the method can be implemented in the driver program of the wireless access network card. In the following, it will be described in detail in combination with examples.

[0061] In order to support the channel reservation mechanism based on the busy tone signal, this patent defines four types of busy tone signals: RBTt, RBTr, DBTt, DBTr. Among them, the first two are real-time busy tones, and the latter two are non-real-time busy tones. RBTt and DBTt broadcast on the sending busy tone channel, and RBTr and DBTr broadcast on the receiving busy tone channel. In order to enable nodes to distinguish two kinds of busy tone (real-time busy tone and non-real-time busy tone) signals broadcast on the same busy tone channel, we have specially defined these two kinds of busy tone channels and four kinds of busy tone.

[0062] Referring to the IEEE 802.11a standard, this patent defines the center frequency of the data channel as 5.29GHz and a bandwidth of 20MHz;...

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Abstract

The invention discloses a channel reservation method based on a double busy tone mechanism in a wireless self-organizing network. Aiming at three conditions that network nodes (comprising transmitting nodes and receiving nodes) transmit and receive non-real-time data packets or transmit and receive a first real-time data packet, the network nodes transmit or receive the second and the following real-time packets, and the nodes monitor the real-time busy tone of transmission (RBTt) or real-time busy tone of reception (RBTr) when the adjacent node is started, channel reservation information is broadcast by the double busy tone mechanism, so that the real-time traffic can acquire the right to use the channel in advance, thus improving the success rate of channel reservation, greatly reducing the frame error rate of real-time packet transmission, and ensuring the service quality of the real-time traffic.

Description

technical field [0001] The invention relates to the technical field of communication, and relates to a reliable transmission method of real-time services (such as video, audio data, etc.) based on a double busy tone mechanism in a wireless ad hoc network. Background technique [0002] Wireless self-organizing network (namely Ad Hoc network) is a multi-hop wireless network composed of mobile terminals with wireless transceivers. The establishment of an Ad Hoc network does not require pre-laying network infrastructure, nor does it need to set up any central control nodes. It relies on the mutual cooperation between nodes to form a network by itself in a mobile and complex wireless environment. It is characterized by strong networking flexibility and easy access. It can be widely used in military battlefields, civilian communications, vehicle-mounted networks and other occasions due to its rapid deployment, strong overall system invulnerability, and low cost. [0003] With the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/16H04W84/18
Inventor 李波陈轶
Owner NORTHWESTERN POLYTECHNICAL UNIV
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