Transmission method and apparatus for time division duplexing system

Abstract

The invention discloses a transmission method of a time division duplex system, which comprises the following steps: a radio frame structure used for transaction transmission and configured on a network side comprises two 5ms half frames, each of which is composed of eight 0.5ms transaction time slot zones and one 1ms special time slot zone, and two continuous transaction time slots are one subframe of which the length is 1ms; the special time slot zone comprises three special time slots, i.e. a downlink pilot frequency time slot, a protection interval and an uplink pilot frequency time slot; the lengths of the downlink pilot frequency time slot, the protection interval and the uplink pilot time slot in the special time slot zones are confirmed according to the requirements of a coverage range so as to confirm the radio frame structure used for the transaction transmission; and the network side and the terminal carry out the transaction transmission by using the radio frame. The invention reconfigures the frame structure to flexibly configure the downlink pilot frequency time slot, the protection time interval or the uplink pilot frequency time slot in the special time slot zones according to the requirements of the coverage so as to flexibly support different coverage ranges.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a transmission method and device for a time division duplex 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 two wireless frame structures: [0003] A. The first type of wireless frame (hereinafter referred to as Type1) is suitable for frequency division duplex (Frequency Division Duplex, FDD) and time division duplex (Time Division Duplex, TDD) systems, and its structure is as follows figure 1 shown, where: [0004] The frame length of Type1 is 10ms, consisting of 20 time slots, and the length of each time slot is 0.5ms. figure 1 Marked as #0~#19. Every two consecutive time slots is defined as a subframe, and there a...

AI Technical Summary

Problems solved by technology

However, the above-mentioned configuration method is not flexible enough for the coverage. For example, for a cell whose coverage is required to be 40 kilometers, its frame structure needs to adopt scheme C, and scheme C can support a maximum coverage of 120 kilometers. Therefore, in practice A large part of the GP is wasted during application, which affects the improvement of system transmission efficiency

[0020] Therefore, existing technologies cannot flexibly support various coverage requirements

Images