Method and device for preventing relay cellular system from uplink and downlink interference

Abstract

The invention relates to a realization method in which a Relay support cellular system can effectively avoid the interference of uplink and downlink, and a device thereof as well as a solution which allows the interference of the uplink and the downlink to be introduced by the system due to coverage expansion. The invention is realized by a special design of a frame structure and the special design comprises a transmission order of four system links in the frame structure which are a downlink relay link L1, a downlink access link L2, an uplink access link L3 and an uplink relay link L4, and a guard space of a transfer point of the uplink and the downlink. When the transmission order of the four links of the frame structure is L1, L2, L3 and L4, a multiplying adjustment is processed on the required guard space of the transfer of the uplink and the downlink simultaneously allowing for path propagation delays between BS and RS as well as between RS and UE, namely offsetting the propagation delay between RS and UE; when the transmission order of the four links of the frame structure is L1, L2, L4 and L3, the guard space of the transfer of the uplink and the downlink only allows for the propagation delay between BS and RS while the propagation delay between RS and UE can be guarded by idle time which is caused by a sending to BS in advance from RS.

Description

technical field [0001] The present invention relates to mobile communication wireless access system technology, more precisely to a wireless access system using relay (Relay) or relay station (RS) technology in future mobile communication systems, which can effectively avoid uplink and downlink interference. Background technique [0002] Coverage is an important indicator of a wireless access system, and a wireless access system generally achieves coverage of a service area through a base station or an access point. However, due to the mobility of the terminal, it is entirely possible that the terminal is outside the service area and cannot obtain wireless access services; even if the terminal is within the service area, the transmission of the signal may still be blocked by obstacles on the transmission path, resulting in service failure. A drop in quality. In the future mobile communication system, it is necessary to transmit very high-speed data (such as 1Gbps), and due ...

AI Technical Summary

Problems solved by technology

According to the existing traditional TDD frame structure design, such as figure 1 As shown in , the transmission of four links cannot be satisfied and interference between uplink and downlink will inevitably occur

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