Method for configuring sounding reference signals

Abstract

The invention provides a method for configuring sounding reference signals (SRS), which comprises the following steps: for each kind of configuration of subframe configuration parameters of the SRS, determining configuration orthogonal to the configuration; grouping all configuration of the subframe configuration parameters of the SRS to obtain three groups of configuration; according to a rule that each cell and adjacent cells belong to different types of cells, dividing all cells into three types, and corresponding the three types of cells to the three groups of configuration of the subframe configuration parameters of the SRS one by one; for each cell, according to number and moving speeds of UE and a rule that orthogonal configuration of the subframe configuration parameters of the SRS in adjacent cells is selected in priority, selecting one kind of configuration from a group of configuration of the subframe configuration parameters of the SRS corresponding to the cell to configure the subframe configuration parameters of the SRS of the cell; and setting subframes of the SRS occupied by the UE in various cells according to the subframe configuration parameters of the SRS of the cell. The method can effectively reduce SRS interference between CoMP cells, and has good compatibility for the conventional system simultaneously.

Description

technical field [0001] The present invention relates to a transmission technology in a mobile communication system, in particular to a configuration method of a sounding reference signal (Sounding RS, SRS). Background technique [0002] In order to cope with the market competition of the WiMAX standard and realize the integration of mobile communication and broadband wireless access technology, the 3rd Generation Partnership Project (3GPP) organization launched the Long Term Evolution (LTE) project. LTE adopts Frequency Division Multiple Access (OFDM / FDMA) in the air interface to replace the Code Division Multiple Access (CDMA) method of the third generation mobile communication system (3G). It is an important goal of LTE to reduce delay, increase user data rate, improve system capacity and coverage, and reduce operators cost. [0003] The subsequent evolution of the Long Term Evolution (Long Term Evolution-Advanced, LTE-A) system proposes to adopt coordinated multi-point (...

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Problems solved by technology

[0011] In order to solve the above-mentioned SRS interference problem between CoMP cells, at present, 3GPP proposal R1-092367 proposes that a new SRS sequence design can be considered for CoMP users, so that the SRS sequences of CoMP users and non-CoMP users in the coordinated cell are mutually Orthogonality is used to reduce SRS interference between CoMP cells. Although this idea can achieve the expectation of orthogonality, it violates the purpose of backward compatibility of LTE-A. The protocol needs to be greatly modified, and it requires a very fine design to achieve Guarantees the orthogonality of SRS between CoMP users and LTE users, therefore, it is not feasible

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