Performance evaluation system aiming at Relay technology in LTE-A (Long Term Evolution-Advanced) system

Abstract

The invention discloses a performance evaluation system aiming at a Relay technology in an LTE-A (Long Term Evolution-Advanced) system. The performance evaluation system comprises the following steps of: carrying out layout on a Relay system wireless scene module base station, a Relay and users, generating large-size channel information and small-size channel information of a link and carrying out service base station or service Relay node selection on the users; and then, respectively carrying out data transmission on a return subframe and an access subframe according to the allocation proportion of the two subframes, carrying out wireless resource allocation on the users and Relay nodes served by the base station and Relay service users, carrying out data transmission according to a resource allocation result and feedback information, such as CQI (Channel Quality Indicator), PMI (Pre-coding Matrix Index) and the like, and recording and making a statistic on a simulation result. In the invention, a modularized simulation method is used in a simulation model, each module provides interface parameters, so that the simulation model has favorable expandability on a new technology. Besides, the performance evaluation system also provides a plurality of related modules of technologies, such as a service cell selection method, a resource allocation algorithm and the like in a Relay network, for reference and calling.

Description

Technical field: [0001] The invention belongs to the technical field of communication, and relates to a system performance evaluation system of a communication system, in particular to a system performance evaluation system for a relay (Relay) cellular network in an LTE-A system. Background technique: [0002] As a low-power, low-cost network node, wireless relay technology is an important candidate scheme studied by 3GPP to meet the higher requirements of IMT-Advanced for communication system peak rate, spectrum efficiency and system capacity. The introduction of relay technology can effectively fill the coverage holes and shadow blind spots caused by insufficient coverage, especially for high-frequency bands with large path loss and penetration loss, which can better expand cell coverage. Moreover, through the frequency reuse of the relay station, cell splitting gains can be obtained, thereby achieving better spectrum utilization and greater system capacity. The relay sta...

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Problems solved by technology

Secondly, in the relay system, in order to prevent the receiving side from being affected by the signal leakage of the transmitting side of the relay itself when the relay node performs transmitting and receiving operations at the same time, 3GPP TR36.814 proposes to use a half-duplex method, that is, wireless frames It is divided into backhaul subframe and access subframe, in which the backhaul subframe is used for the service from the base station to the relay node, and the access subframe is used for the service of the base station and the relay node to their respective service users, and the radio resource allocation method is also become more complicated

In the simulation process of the LTE system, the entire wireless frame is used for the service of the base station to the user, while the simulation of the relay system needs to divide the wireless frame, which greatly increases the difficulty of the simulation

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