Method for implementing critical frequency coexist between two different communication systems and physical layer frame structure

Abstract

The invention discloses a wireless communication method of a TDD OFDM wireless communication system, and a physical layer frame structure for realizing the communication method. During conducing wireless transmission, each sub-frame in the physical layer frame sends a downlink service control message by using a regular time slot, receives uplink service by using one or more regular time slots after pausing for a period of time, and sends downlink service by using one or more regular time slots after pausing for a period of time. Considering the adjacent frequency coexistence problem of the TDD OFDM system and the TD-SCDMA system, the sub-frame conducts mutual switching between the uplink and the downlink during pausing periods, so as to ensure alignment of the same type of uplink and downlink switching points in the two communication systems, including the alignment of downlink / uplink switching points and the alignment of uplink / downlink switching points. The inventive method conducts wireless service transmission by using the alignment of the uplink and downlink switching points, thereby eliminating intersystem interference and improving the utilization ratio of system resources.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a kind of Time Division Duplex (TDD) Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) communication system and Low Chip Rate (LCR) Time Division Synchronous Code Division Multiple Access (TCDMA) TD-SCDMA) communication system realizes the method and the physical layer frame structure of adjacent frequency co-existence. Background technique [0002] The physical layer frame structure is the basis of any communication system, that is, each communication system includes its unique physical layer frame structure. TD-SCDMA (Time Division-Synchronized Code Division Multiple Access, Time Division-Synchronized Code Division Multiple Access) is one of the third-generation mobile communication standards, and the physical layer frame is also the basis of the TD-SCDMA system. For the time division synchronous code division ...

AI Technical Summary

Problems solved by technology

The method described in this patent points out a development direction of the TDD system in the last three generations (B3G), but the frame structure described can be considered as an improvement of the frame structure of the TD-SCDMA system, and the basic structure between the two is similar , if it is applied in TDD OFDM system, it can realize co-existence with TD-SCDMA adjacent frequency by means of time slot alignment, but this method reduces the utilization rate of system resources

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