Reference signal transmitting method and device

Abstract

The embodiment of the invention provides a cell-specific common control reference signal resource configuring method used for detecting common control information and / or broadcast messages. The method comprises that a base station determines the sequence and location of an adopted cell-specific common control reference signal according to generated parameters such as the number of antenna ports used for transmitting common control information and used time-frequency resources.

Description

technical field [0001] The embodiments of the present application relate to the technical field of communication, and more specifically, to a method for sending a reference signal used for detecting common control information or multicast / broadcast information in wireless communication. Background technique [0002] The current wireless communication technology has been developed to LTE (full name in Chinese: Long Term Evolution; full name in English: LongTerm Evolution) system, with figure 1 For example, the existing LTE system includes multiple cells, and each cell has a base station 11 and multiple terminals 12, and the base station sends public control information and data to the terminals, as well as references for detecting public control information and data. Signal. [0003] In the existing LTE R8-R12 system, there are three main types of reference signals used for downlink channel measurement and data demodulation: CRS (full name in Chinese: Cell-specific Reference...

AI Technical Summary

Problems solved by technology

In contrast, for cell-specific (English full name: Cell-specific) signals that need to be sent to all terminals or most terminals in the cell, such as multicast messages, broadcast messages, control signals, etc., in order to enable all terminals within the coverage area to receive To these Cell-specific signals (without loss of generality, this application is collectively referred to as common control information, correspondingly, the channel carrying the common control information is the common control channel) and reference signals for detecting these common control information, it is It is necessary for the base station to use M-MIMO technology to generate a wide beam similar to omnidirectional transmission (English full name: omni-directional transmission), or to generate a wide beam with a width of 120 degrees under a three-sector configuration (see figure 2 Solution 2 in ), but unfortunately, the use of wide beams will lose array gain and shorten the transmission distance, so terminals at the edge of the cell often cannot receive Cell-specific signals or the quality of received Cell-specific signals very poor

This is a contradiction, so it is often necessary to make a compromise between array gain (or beam width) and coverage, namely figure 2 Option 3 in , however, Option 3 still does not fundamentally solve the contradiction between array gain and coverage

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