Transmission method and apparatus for long term evolution TDD system

Abstract

The invention discloses a transmission method for a long-term evolution time division duplex system; by carrying out reconfiguration to a half-frame structure, the invention leads the quantity of a special time slot area, and a downlink pilot time slot, a protection interval or an uplink pilot slot included in the special time slot area to be capable of realizing flexible configuration according to the requirement of a system to covering ranges, thereby achieving flexible support of different covering ranges. The invention simultaneously discloses a transmission device for the long-term evolution time division duplex system which uses the method, and achieves flexible support of different covering ranges.

Description

technical field [0001] The present invention relates to the realization technology of the long-term evolution time-division duplex (LTE TDD) system, in particular to a transmission method and device of the long-term evolution time-division duplex (LTE TDD) system. Background technique [0002] Currently, the Third Generation Mobile Communication System Standardization Organization (3GPP) has initiated a research project on the Long Term Evolution (LTE) of the 3G radio interface technology. According to the research progress, the LTE system determines to support 2 frame structures: [0003] The first type of frame structure see figure 1 , this type of frame structure is applicable to FDD and TDD systems: [0004] Such as figure 1 As shown, the frame length of the first type of wireless frame is 10ms, which consists of 20 time slots, each time slot length is 0.5ms, such as figure 1 As shown, the labels are from 0 to 19. Two consecutive time slots are defined as a subframe...

AI Technical Summary

Problems solved by technology

Such a configuration method is not flexible enough to support coverage. For example, for a cell with a coverage requirement of 50km, its frame structure must be configured to support a maximum coverage of 120km. At this time, a large part of the time slot is wasted as a guard interval. , which actually affects the transmission efficiency

[0013] It can be seen that in the prior art, the length and position of the special time slot area are fixed, and the coverage supported by the 50us GP is relatively small, and the only way to support a large coverage is to use UpPTS or UpPTS +TS1 or UpPTS+TS1+TS2 are used as the method used by GP to support different coverage areas, the adjustment is not flexible, and affects the transmission efficiency

In addition, due to the long CP length in the existing frame structure, the transmission process overhead is relatively large, which also affects the transmission efficiency.

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