Method and device for notifying and receiving downlink demodulation reference signal initialization configuration parameters

Abstract

The invention discloses a method and device for notifying and receiving downlink demodulation reference signal initialization configuration parameters. The notifying method is applied to a base station. The downlink demodulation reference signal initialization configuration parameters comprise identifications (IDs) and / or scramble identifications. The notifying method comprises two steps, wherein the first step is that the base station configures N IDs for a terminal according to a high-level signaling exclusive to a user; the second step is that the base station judges whether more than two of the N IDs are identical, and decides to determine the initialization value of a downlink DMRS sequence in one of the following modes according to the judging result; the scramble identification nSCID and the ID used for determining the initialization value of the downlink DMRS sequence are sent to the terminal. By means of the method and device for notifying and receiving the downlink demodulation reference signal initialization configuration parameters, the switchover between dynamic orthogonality and interference randomization of the interference of one UE to other UE can be realized, and therefore the effects of offsetting the interference of users, improving the accuracy of data acceptance and enabling cells to split and gain under the Scenario 4 are achieved.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a downlink demodulation reference signal initialization configuration parameter notification and receiving method and device. Background technique [0002] After the Long Term Evolution (LTE for short) system has gone through several versions of R8 / 9 / 10, it is preparing to study R11 technology one after another. At present, some R8 products are gradually commercialized, and R9 and R10 are subject to further product planning. [0003] After going through the stages of R8 and R9, R10 added many new features on the basis of the first two, for example, Demodulation Reference Signal (DMRS for short), Channel State Information Reference Signal (Channel State Information Reference Signal, referred to as CSI-RS) and other pilot features, as well as antenna support and other transmission and feedback features, etc., especially the inter-cell interference cancellation enhancement (eh...

AI Technical Summary

Problems solved by technology

[0040] In addition, in the Scenario4 scenario, different nodes under the same cell have the same ID, and UEs under these nodes can only select two scrambling code identifiers, which will limit the cell splitting gain in the Scenario4 scenario

[0041] Aiming at the inability to dynamically switch from the new version initialization method to the old version initialization method in related technologies, and in the case of supporting various old versions, it is impossible to dynamically indicate the selection of initialization parameters, resulting in DMRS orthogonal and quasi-parameters in the R11 system. Orthogonal CoMP technology does not work well and cell splitting gains are limited in Scenario4 scenarios, and no effective solutions have been proposed so far

Images