TDD system signal transmission method and frame structure

Abstract

The invention discloses a method of transmitting a signal of a time division duplex system, which includes that within the time length 5ms of a half-frame of wireless frames, the base station transmits signal on M normal downlink special time slots, and receives signal on N normal uplink special time slots; the time lengths of normal time slots, including normal downlink time slots and normal uplink time slots, are equal, and the remained time length is the special downlink time slot of transmitting signal and / or the protective gap of non-transmitting signal, or the remained time length is the special uplink time slot of receiving signal and / or the protective gap of non-transmitting signal. A frame structure comprises two 5ms half-frames of equal length, each half frame includes M normal downlink time slots and / or N normal uplink time slots, the time lengths of the normal time slots are equal, each half frame also includes a special downlink time slot and / or a protective gap, or a special uplink time slot and / or a protective gap, wherein M and N are integers. The invention resolves the problem of wasting resources.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a transmission method and frame structure of a time division duplex system signal. Background technique [0002] figure 1 It is a schematic diagram of the wireless frame structure of a time division duplex system. In the schematic diagram, a 10ms radio frame includes two equal-length half-frames, and the length of each half-frame is 5ms. Each half frame includes 7 general time slots (also called subframes) and 3 special time slots: downlink pilot time slot DwPTS, guard interval GP and uplink pilot time slot UpPTS. [0003] The total length of the three special time slots DwPTS, GP and UpPTS is equal to 275us. Among them, the time slot length of DwPTS is approximately equal to 83.33us, and the primary synchronization channel (P-SCH) signal mainly used for downlink synchronization is sent on the middle bandwidth of the time slot, and no data is sent in other bandwidths of the...

AI Technical Summary

Problems solved by technology

In the cellular environment, due to the high power of the P / S-SCH signal, it will seriously affect the receiving performance of the uplink time slot signal;

[0011] 3. The utilization efficiency of DwPTS time slot is not high

When the bandwidth of the system is relatively wide, since only the P-SCH signal is sent on the middle bandwidth (1.25MHz) of the system bandwidth, the utilization efficiency of the DwPTS time slot will be very low

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