Signal transmission method and frame structure adopted in a TDD system

摘要

A signal transmission method in a Time Division Duplex (TDD) system is disclosed. The method comprises following steps: within a time length of a half-frame of a radio frame, base station transmits signal on a downlink special time slot, thereafter does not transmit signal on a Guard Period (GP), and then receives signal on an uplink special time slot; all time lengths of other uplink or downlink normal time slots for transmitting signal are equal; the total time length of the downlink special time slot, the guard period and the uplink special time slot is integer times of the time length of an uplink or downlink normal time slot. In addition, a frame structure adopted in the TDD system which corresponds to the method is disclosed. The present invention makes it flexible to set the duration of the GP and it is guaranteed that, even if a synchronization signal adopts power promotion, it will not bring great interference to uplink reception of other base stations; in addition, the utilization efficiency of the system is improved.

主权项

1. A signal transmission method in a TDD system, comprising: within a time length of a half-frame of a radio frame, a base station transmitting signals in a downlink special time slot, thereafter not transmitting signals in a guard period (GP), and then receiving signals in an uplink special time slot; all time lengths of other uplink or downlink normal time slots for transmitting signals being equal; the total time length of the downlink special time slot, the guard period and the uplink special time slot being integer times of the time length of one uplink or downlink normal time slot; and
wherein the number of the uplink and downlink normal time slots in the half-frame is 4, 5, 6, 8, 10, 11, 12, 13 or and within the time length of the half-frame base station transmits signals in order in the first downlink normal time slot, in the second downlink normal time slot and in the downlink special time slot, thereafter does not transmit any signal in the GP, and then, receives signals in the uplink special time slot, and receives or transmits signals in the remaining 6 time slots according to uplink and downlink setting and the total time length of the downlink special time slot, the GP and the uplink special time slot is 2 times of the time length of one normal time slot.