Method for node matching and resource competition in full-duplex wireless network

Abstract

The invention relates to a method for node matching and resource competition in a full-duplex wireless network. According to the invention, key problems such as resource competition, flow matching, co-channel interference, node matching, uplink multi-terminal competition access and the like in an existing full-duplex network are effectively solved through comprehensively applying technical means of flow balance evaluation, uplink parameter adaption, polling fragment transmission, feedback gap detection, competition matching attempt and the like, and reliable and efficient co-channel two-way transmission is realized under a multi-user environment.

Description

technical field [0001] The invention relates to a wireless communication network simultaneous same-frequency full-duplex bidirectional transmission technology in the field of information technology, in particular to a method for node pairing and resource competition in a full-duplex wireless network. Background technique [0002] For a long time, the two-way transmission of information in wireless communication networks has been realized through the "half-duplex mode", that is, the signal transmission and reception of communication nodes must occupy two different wireless channels. According to different configuration methods of transmitting and receiving channels, wireless communication networks can be correspondingly divided into two types: time division duplex (TDD) and frequency division duplex (FDD). The transceiver channels of the TDD system are located in different time slots of the same carrier, while the transceiver channels of the FDD system are separated on two di...

AI Technical Summary

Problems solved by technology

[0010] The node pairing problem is a new topic in the full-duplex wireless network environment, which cannot be solved by any existing algorithms and protocols

The main difficulties come from two aspects: 1) Ideally, the two terminal nodes that establish full-duplex communication with the central control node should be hidden from each other, and cannot directly exchange information with each other

Therefore, if the distributed node autonomous pairing method is adopted, when the sending terminal node performs resource competition and uplink transmission, it is usually difficult for the receiving terminal node to obtain relevant information in a timely manner, so that effective channel measurement and interference assessment cannot be implemented

2) If a centralized node pairing method based on central control node scheduling is adopted, it is necessary to perform channel measurement on possible node pairing combinations in the network before full-duplex communication is established, and feed back the corresponding interference assessment results through the uplink channel; At this time, the amount of feedback information will increase exponentially with the increase of the number of nodes in the network, and the signaling overhead is too large, making it difficult to support application scenarios where the network topology changes rapidly.

[0012] However, in a full-duplex wireless network, although uplink transmission and downlink transmission can be multiplexed on the same channel (ie frequency resources); but when the central control node is continuously sending downlink data packets, the channel it occupies will be Always in a busy state, multiple terminal nodes cannot achieve uplink contention access on this channel through any existing Listen-Before-Talk mechanism

The reason is that the uplink transmission signal or transmission request signaling of any terminal node will be "submerged" in the downlink transmission signal sent by the central control node, and cannot be recognized by other terminal nodes, so that the channel between multiple terminal nodes cannot be realized contention access and random backoff

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