Cooperative control method for transmitting power of gateway and terminals in hierarchical M2M network

Abstract

The invention provides a cooperative control method for transmitting power of a gateway and terminals in a hierarchical M2M network, and relates to the field of wireless communications. The cooperative control method for the transmitting power of the gateway and the terminals is realized by establishing a wireless communication link by employing full duplex relay transmission, obtaining channel state parameters (the expression is shown as in the description) and (the expression is shown as in the description) of a wireless M2M gateway, calculating a channel gain in the network after obtaining the channel state parameters (the expression is shown as in the description) and (the expression is shown as in the description) of wireless M2M terminals, and calculating a transmitting power control parameter in the case that the data throughput of each wireless M2M terminal is satisfied. Proportions of signal power to interference noise power, namely, signal to interference plus noise ratios from the terminal to a gateway link and from the gateway to a base station link are effectively improved, so that the energy consumption of the M2M terminals is minimized, the minimum time delay requirements of M2M communication are satisfied, and the utilization rate of spectrum resources of a cellular network is effectively improved.

Description

Technical field [0001] The invention relates to a coordinated control method, in particular to a method for coordinated control of transmission power of a gateway and a terminal in a hierarchical M2M network used in the field of machine-to-machine (Machine-to-Machine, M2M) wireless communication. Background technique [0002] With the widespread deployment of mobile communication networks worldwide, wireless data services have expanded from traditional human-to-human (H2H, Human to Human) communications to the M2M communications field. The prototype of M2M communication is Wireless Sensor Network (WSN, WirelessSenorNetwork), which refers to autonomous information interaction among multiple network devices or terminals without manual intervention. M2M communication is mainly oriented to the transmission of real-time environmental monitoring and control data. Its application fields cover many fields such as industrial automation and smart city power grids, medical treatment and eme...

AI Technical Summary

Problems solved by technology

When a large number of M2M terminals send uplink transmission requests to the base station at the same time, it will inevitably cause network congestion; in addition, due to the small amount of data transmission of a single M2M communication link, establishing a large number of uplink communication links from M2M terminals to the base station will undoubtedly cause Increase the transmission overhead of link control and management information, resulting in ineffective use of network communication resources;

[0005] 3) Although the H2H terminal has disadvantages such as high energy consumption and poor battery life, its battery can be easily charged and replaced

In addition, Document 4 uses ordinary H2H user terminals as M2M communication relay nodes, which is only suitable for small-scale M2M communication environments such as homes or offices (the number of terminals in an M2M group is <10). It is not as good as a dedicated M2M gateway, so it cannot cope with the needs of large-scale M2M communication (the number of terminals in an M2M group)

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