Modeling method in asynchronous D2D network based on PPP distribution and OFDM system

Abstract

The invention discloses a modeling method in an asynchronous D2D network based on PPP distribution and an OFDM system. Supposing that one receiving device receives discovery signals from N transmitting devices at the same time, all users are asynchronous in the network, communication links have a corresponding time deviation D and are independent of each other and the positions of the users in the region follow the Poisson point process distribution, the method comprises the following steps: dividing OFDM transmitting time misalignment into four conditions, carrying out the detailed link stage analysis, obtaining a signal power expression, simplifying the total interference power withstood by a receiving end through the further hypothesis verification, and finally proposing a first-order SINR model which is easy to process. The method accords with an actual communication environment very well, can be very conveniently used for the system-level research of the asynchronous D2D network, and overcomes a difficulty in system-level research modeling. In addition, the method also can be used for the system-level performance analysis of an ad-hoc network and a cellular network.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and proposes a modeling method based on PPP distribution and OFDM system for asynchronous D2D network, which can be used for system-level research of asynchronous D2D network to solve the problem of system-level research modeling. Background technique [0002] As a key technology of 5G in the future, direct-to-device (D2D) technology allows mobile terminals to directly communicate point-to-point without going through a base station. It is a technology that allows terminals to communicate directly by multiplexing cell resources. The characteristics of low latency, high reliability, and low power consumption exhibited by 5G transmission can well serve IoT applications. The D2D technology can improve the total throughput of the network, and while saving wireless resources, it can also reduce the burden on the base station and shorten the communication time. In addition, since the dista...

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Problems solved by technology

[0004] Aiming at a series of problems such as complex calculation of interference power in an asynchronous network in which each user in the D2D network cannot be accurately synchronized and the time is misaligned, the present invention proposes a construction based on PPP distribution and OFDM system in the asynchronous D2D network. Modular method to simplify the calculation of SINR

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