Method and equipment for configuring downlink control information

Abstract

Embodiments of the invention provide a method and equipment for configuring downlink control information. Specifically, corresponding demodulation reference signal configuration information is set for three demodulation reference signal enhancement conditions, and is indicated by downlink control information in the embodiments of the invention. According to one embodiment of the invention, a base station sends downlink control information to user equipment, wherein the downlink control information includes a demodulation reference signal configuration index used to indicate demodulation reference signal configuration information, and the demodulation reference signal configuration information includes one item in a demodulation reference signal configuration information set. Under the condition that one codebook is used, the demodulation reference signal configuration information set includes a layer, an antenna port 11 or 13, and a first combination set of scrambler serial numbers. Under the condition that two codebooks are used, the demodulation reference signal configuration information set includes 2, 3 or 4 layers, at least one of antenna ports 7, 8, 11 and 13, and a second combination set of scrambler serial numbers.

Description

technical field [0001] Embodiments of the present disclosure relate to mobile communication technologies, and in particular to a method and device for configuring downlink control information. Background technique [0002] In LTE Release 13, 3GPP has decided to consider Demodulation Reference Signal (DMRS, enhancement) to better support downlink multi-user MIMO (MU-MIMO). Here, some candidate schemes for DMRS enhancement are proposed to reduce mutual interference between DMRS ports. [0003] Solution 1: use 12 DMRS resource elements, and use an Orthogonal Cover Code (Orthogonal Cover Code, OCC) with a length of 4. The scheme supports 4 layers / scrambling sequences. [0004] Solution 2: use 24 DMRS resource elements, and use an OCC with a length of 2. The scheme supports 4 layers / scrambling sequences. [0005] Scheme 3: use 24 DMRS resource elements, and use an OCC with a length of 4. The scheme supports 8 layers / scrambling sequences. [0006] In schemes 1 and 2, the num...

AI Technical Summary

Problems solved by technology

However, the current DCI for DMRS configuration only has a 3-bit index for indicating DMRS configuration information, and can only support the case where the number of orthogonal DMRS ports per scrambling sequence is 2

[0010] Therefore, for the above-mentioned candidate solutions, DCI formatted in DCI format 2C / 2D in the current Release 12 cannot support extended DMRS configuration

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