Method and device for indicating information

Abstract

The embodiment of the invention provides a method for indicating information, and the method comprises the following steps: a base station communicates with user equipment (UE) and allocates a corresponding dataflow to the UE according to the attribute of the UE; the base station sends downlink control information (DCI) to the UE, wherein the DCI contains information indications allocated to a downlink transmission Rank and a demodulation reference sign (DMRS) port; and the base station sends the corresponding dataflow to the UE through the DMRS port. By using the technical scheme provided bythe invention, the signaling overhead is reduced by using a transmission block switch and through the combined coding of NDI (non-damage inspection) bits in the mono-code transmission, thereby supporting the combined indication of the DMRS port and bus Rank with a lower overhead.

Description

Technical field [0001] The present invention relates to the field of digital communication. Specifically, the present invention relates to a method and equipment for information indication. Background technique [0002] Mobile and broadband have become the development direction of modern communication technology. 3GPP (3rd Generation Partnership Project) is committed to LTE (Long Term Evolution) as the evolution of 3G systems. The goal is to develop 3GPP wireless access technologies. High data rate, low latency and optimized packet data application direction evolution. [0003] In the downlink MIMO (Multi-input Multi-output, single-user multiple-input multiple-output) transmission process, the eNB will assign each UE (User Equipment) channel conditions, service characteristics, priority and other factors The UE is scheduled to allocate a certain number of parallel data streams, each of which is called a layer. In order to support a maximum of 8 layers of spatial multiplexing tech...

AI Technical Summary

Problems solved by technology

However, this scheme cannot indicate the port allocation when a single codeword is retransmitted. For example, in the initial transmission of Rank5 of SU-MIMO, codeword 1 is mapped to layer 2 and codeword 2 is mapped to layer 3 for transmission. If The third layer corresponding to codeword 2 has an error and needs to be retransmitted separately, so none of the situations in Table 1 can correspond to it

Similar problems will also occur in the retransmission process of single codeword layer 2 or layer 4

In addition, according to the situations listed in Table 1, the UE cannot obtain the complete DMRSpattern / total Rank or power offset information through DCI, and if additional notification of such information is required, a large overhead is required;

[0016] (2) Scheme 2 can use 4 bits to realize the joint indication of DMRS port and DMRS pattern, but this method cannot indicate the total Rank, so it cannot support MMSE, ZF and SIC receiving algorithms, and cannot pass the DMRS listed in Table 3 Instruction Information Obtaining PO Instructions

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