Measurement reference signal transmission method and system for coordinated multi-point transmission system

A technology for measuring reference signals and multi-point transmission, applied in transmission systems, digital transmission systems, diversity/multi-antenna systems, etc., can solve the problems of not providing implementation solutions, etc., and achieve the effect of improving the quality of channel estimation and reducing the amount of feedback

Active Publication Date: 2016-03-30
ZTE CORP
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Problems solved by technology

At this time, for the receiving end (base station) of the uplink, how to reasonably configure the transmission of SRS so as to improve the channel estimation quality of the SRS at the receiving end (base station) is a problem to be solved, and no specific information is provided at present. Implementation plan

Method used

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  • Measurement reference signal transmission method and system for coordinated multi-point transmission system
  • Measurement reference signal transmission method and system for coordinated multi-point transmission system
  • Measurement reference signal transmission method and system for coordinated multi-point transmission system

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no. 1 example

[0064] In the first embodiment, it is assumed that in the configuration information, the cell-specific subframe period T of each cell in the coordinated multi-point transmission system coordination set SFC and the cell-specific subframe offset Δ SFC If set to be consistent, the configuration information of each cell in the cooperating set and / or the SRS transmission information of each cell in the cooperating set are exchanged between the cooperating sets.

[0065] The configuration information of each cell in the cooperative set is exchanged between base stations (intercite / cell) through the X2 interface or within the base station (intracite / cell) through an internal interface of the base station. The base station uses the channel estimation method of linear minimum mean square error (LMMSE) for the received SRS according to the configuration information exchanged in the cooperative set to perform accurate channel estimation. The channel estimation method of LMMSE is shown i...

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Abstract

The present invention provides a method and a system for sending a sounding reference signal used for a coordinated multipoint transmission system. The method comprises: a base station setting configuration information for sending an SRS and delivering the configuration information to a user terminal, and the user terminal sending, according to the obtained configuration information, the SRS to the base station. Through the method of the present invention, the quality of SRS channel estimation by each base station in a coordinated set is improved, so that the base station may obtain downlink channel information by use of channel reciprocity, thereby greatly reducing the feedback quantity of a UE.

Description

technical field [0001] The present invention relates, in particular, to a measurement reference signal (SRS, Sounding Reference Signal) sending method and system for a coordinated multi-point (CoMP, Coordinated Multi-point) transmission system. Background technique [0002] The uplink physical channels of the Long Term Evolution (LTE, Long Term Evolution) system include a physical random access channel (PRACH, Physical Random Access Channel), a physical uplink shared channel (PUSCH, Physical uplink shared channel), and a physical uplink control channel (PUCCH, Physical uplink control channel). Among them, PUSCH has two different cyclic prefix (CP, CyclicPrefix) lengths, which are normal cyclic prefix (NormalCP, NormalCyclicPrefix) and extended cyclic prefix (ExtendedCP, ExtendedCyclicPrefix). Each transmission subframe (Subframe) of the PUSCH is composed of two time slots (S1ot). For different cyclic prefix lengths, the position of the demodulation reference signal (DMRS, De...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12
CPCH04B7/024H04L5/0035H04L5/0048H04L5/0094
Inventor 王瑜新郝鹏陈艺戬
Owner ZTE CORP
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