Power Control Method Based on Time-Domain Half-duplex Relay in D2D Cellular Network

Abstract

The invention provides a power control method based on a time domain half-duplex relay in a D2D cellular network. The method is suitable for being used for the technical field of wireless communication. A base station B conducting transmission through a point-to-multipoint topology cellular network, a cellular network receiving end C, a D2D transmitting end R serving as a cellular communication relay and a D2D receiving end E are arranged. The D2D transmitting end serves as the relay of cellular communication between the base station B and the receiving end C. Joint power control is conducted on the cellular communication and the D2D communication. The orthogonal channel spectrum reuse of the cellular communication and the D2D communication is achieved through a time domain half-duplex wireless relay technology. The minimum data throughput of the cellular communication is achieved while the throughput of the D2D communication is maximized, so that the overall performance of systems and individual performance of users are combined, and good balance is achieved on the system level and the user level.

Description

technical field [0001] The present invention relates to a half-duplex relay power control method, and is especially suitable for a time-domain half-duplex relay-based power control method in a D2D cellular network used in the technical field of wireless communication. Background technique [0002] With the rapid increase of broadband wireless data services in the mobile communication market, increasing the user capacity of the cellular network, expanding the coverage of the cellular cell and enhancing the service quality of the network have become important issues to be solved urgently. In recent years, the mobile communication standardization organization 3GPP-LTE has paid attention to and researched a new short-distance data transmission technology, that is, D2D communication technology. D2D communication means that, on the premise of not affecting the data transmission of other cellular users and D2D users, user terminals with a geographically close location can establish...

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Problems solved by technology

However, in the above literature, the D2D transmitting terminal is only used as a relay node to assist cellular wireless multicast transmission, and does not generate any data service itself, which is inconsistent with the actual application of D2D users to transmit local data services

[0013] In addition, none of the above documents 1 to 5 considered the overall power consumption of D2D communication and cellular communication

Using wireless relays to improve the channel quality of single-hop wireless links, the premise is that the spectrum, energy, and power overhead of the system cannot be increased

Documents 1 to 5 do not limit the joint transmission power of the data source node and the relay node. Therefore, the improvement of system performance is not only obtained by introducing wireless relay nodes but also by increasing the energy consumption of the system, which is different from the current The development trend of mobile communication systems towards green radio i.e. low energy consumption is contrary to

[0014] In theory, half-duplex relays can only obtain 1 / 2 of the spectrum resource utilization. Under the joint power constraints of D2D communication and cellular communication, how to achieve effective power control and interference management, and meet the minimum data throughput requirements of cellular communication. At the same time, maximizing the data throughput of D2D communication is a problem that needs further research and solution

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