TDD system signal transmission method and the adoptive frame structure thereof
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A technology of time division duplex system and transmission method, applied in the direction of transmission system, digital transmission system, radio transmission system, etc., which can solve the problem of affecting the reception performance and degradation of uplink time slot signals, and can not reserve some symbols of TS0, DwPTS Problems such as low time slot utilization efficiency
What is AI technical title?
AI technical title is built by PatSnap AI team. It summarizes the technical point description of the patent document.
A technology of time division duplex system and transmission method, applied in the direction of transmission system, digital transmission system, radio transmission system, etc., which can solve the problem of affecting the reception performance and degradation of uplink time slot signals, and can not reserve some symbols of TS0, DwPTS Problems such as low time slot utilization efficiency
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[0125] The present invention divides the 10ms wireless frame into two 5ms half-frames of equal length, and then divides the half-frame into n equal-length time slots, denoted as TS 0 ~TS n-1 , each time slot lasts T slot . Select k consecutive time slots TS i ~TS i+k-1 Combined, used as downlink special time slot, GP and uplink special time slot, the duration and length are respectively recorded as T DL , T GP and T UL . In the wireless frame formed in this way, each half frame includes a downlink special time slot, a guard interval GP, an uplink special time slot, and a plurality of equal-length uplink and downlink general time slots, the downlink special time slot, protection The sum of the interval and the length of the uplink special time slot is an integer multiple of the length of an uplink or downlink general time slot.
[0126] n×T slot = 5ms
[0127] T DL +T G P+T UL =T slot ×k
[0128] where T DL Indicates the time length used to transmit the downlink...
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Abstract
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.
Description
technical field [0001] The invention relates to the field of mobile communication, in particular to a transmission method of a time division duplex system signal and a frame structure adopted therefor. 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 DwPTS, GP and UpPTS. The total length of the three special time slots DwPTS, GP and UpPTS is equal to 275us. [0003] Among them, the length of the DwPTS time slot is approximately equal to 83.333us, and the primary synchronization signal (P-SCH) is sent on the middle bandwidth of the time slot, and the primary synchronization signal is mainly used for downlink synchronization. The other bandwidths of the time slot do not send ...
Claims
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