Method for transmitting special subframe signals of LTE TDD and equipment

Abstract

The invention provides a method for transmitting special subframe signals of LTE TDD. The method comprises the steps that a base station sends special subframe configuration and related control parameters used by new signaling configuration and new UE; the base station dispatches the downlink transmission or the uplink transmission of the new UE at a special subframe according to the special subframe configuration configured by the new signaling; the new UE carries out the downlink transmission or the uplink transmission on the special subframe according to the special subframe configuration configured by the new signaling and the dispatching of the base station. According to the method, the base station is made to be capable of fully utilizing available downlink resources, and the resource utilization rate is improved. Greater flexibility is provided for the base station, and downlink data transmission can be selected to be carried out on the new UE based on a CRS or a DMRS. When the CRS does not exist in the data area where the base station configures DwPTS for the new UE and the new UE is configured by adopting the data transmission based on the DMRS, interference coordination is easy to achieve, and system performance is easily improved by using CoMP and other technologies. According to the method, the capacity of SRS in an LTE TDD system is increased, the SRS transmission in a common subframe can be avoided, and influences on a PUSCH and a PUCCH are reduced.

Description

technical field [0001] The present invention relates to a wireless communication system, and more specifically relates to a signal transmission method and equipment of a special subframe in an LTE TDD system. Background technique [0002] In the 3GPP Long Term Evolution (LTE, Long Term Evolution) system, the downlink transmission technology is Orthogonal Frequency Division Multiple Access (OFDMA), and the uplink transmission technology is Single Carrier Frequency Division Multiple Access (SCFDMA). LTE supports Time Division Duplex (TDD) mode. figure 1 It is a schematic diagram of the frame structure of the TDD system. The length of each radio frame is 10 milliseconds (ms), and it is equally divided into two half-frames of 5 ms. Each half-frame contains eight general time slots of 0.5 ms and three special domains. For a general CP, each slot includes 7 OFDM / SC-FDMA symbols; for an extended CP, each slot includes 6 OFDM / SC-FDMA symbols. Every two consecutive general time slo...

AI Technical Summary

Problems solved by technology

like Figure 4 As shown, when LTE TDD uses special subframe configuration 5 to achieve coexistence, some uplink and downlink resources are actually wasted

Specifically, resources of 3 OFDM symbols are wasted in the downlink direction, and resources of 4 SC-FDMA symbols are wasted in the uplink direction

For the LTE TDD system with extended CP, there is a similar problem. When the special subframe configuration 4 is used to achieve coexistence, the resources of 2 OFDM symbols are wasted in the downlink direction, and the resources of 3 SC-FDMA symbols are wasted in the uplink direction.

The utilization of uplink and downlink resources can be increased by adding a new special subframe configuration in LTE TDD, but some frame structure problems brought about by the new special subframe configuration need to be solved

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