Node communication method of Ad hoc network and node equipment

Abstract

The invention provides a node communication method of an Ad hoc network. The method comprises: a wireless frame used by inter-node communication comprises a control domain, a data domain, and a feedback domain; a node transmits and receives wireless control information in the control domain, wherein the wireless control information comprises frame structure configuration information used for indicating the time domain structure or the frequency domain structure of the wireless frame or a combination of the time domain structure and the frequency domain structure; the node transmits and receives data via the data domain; and the node receives and transmits feedback information in the feedback domain, wherein the feedback information is constructed by the node according to the state of the data received in the data domain and comprises retransmission feedback indication, a channel quality index, or a combination thereof. The method provided by the invention may greatly improve retransmission efficiency while saving wireless resources, improve data transmission reliability, and reduce interference on adjacent nodes.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a node communication method and node equipment of a centerless network. Background technique [0002] At present, in the field of mobile communication, decentralized networks (also known as self-organizing networks) are more and more widely used. Among them, the relatively mature decentralized network technology is represented by Mesh technology based on IEEE802.16. The physical frame structure of Mesh mode is as follows: figure 1 shown. Each frame includes control subframes and data subframes. The control subframe occupies a predetermined OFDM symbol at the front end of each frame, and it can be divided into several time slots. The remaining symbols are the symbols of the data subframe. The control subframe is fixed to use QPSK modulation and 1 / 2 code rate RS-CC coding. The data subframe can adopt a custom modulation and coding method, but it does not support changing eve...

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Problems solved by technology

[0004] In a non-central network node, because there is no central node coordination, when the node needs to transmit data, the sending node and the receiving node need to obtain resources for transmitting data (transmission bandwidth and duration, etc.) through negotiation or competition. Limited to the wireless frame frame structure, the sending node cannot obtain the HARQ retransmission of the receiving node in the data receiving state of the physical layer during the data transmission process, and can only be guaranteed by ARQ retransmission above the physical layer (such as ARQ retransmission of MAC PDU) The accuracy of data reception, and if ARQ retransmission above the physical layer is required, the receiving node also needs to obtain resources through competition or coordination to transmit feedback information

In the meantime, there may be failures in obtaining resources and failure to send feedback information, and the long time to obtain resources may cause the received feedback information to fail. Therefore, the efficiency of retransmission is not high, and the utilization rate of wireless resources in the network is low.

[0005] Moreover, the sending node cannot obtain the channel quality feedback of the receiving node, and cannot adjust the modulation and coding method and transmission power as the wireless link status changes. In the harsh channel environment, the preset fixed modulation and coding method cannot meet the communication needs.

Usually, in order to maintain the preset fixed modulation and coding mode, the sending node needs to transmit at full power, which will cause problems such as high power consumption of the device or large interference to adjacent nodes.

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