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A kind of DMRS port indicating method and device

A port and indication technology, applied in the field of communication, can solve the problems of DMRS port occupying CDM group and unable to meet NC-JT transmission, etc.

Active Publication Date: 2022-04-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at present, in non-coherent joint transmission (NC-JT) in coordinated multiple points transmission / reception (CoMP) mode, the DMRS ports corresponding to different network devices need to occupy different CDM Group
The combination of DMRS port indications in existing protocols cannot satisfy the transmission of NC-JT

Method used

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  • A kind of DMRS port indicating method and device
  • A kind of DMRS port indicating method and device
  • A kind of DMRS port indicating method and device

Examples

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Embodiment Construction

[0107] The present application will be described in further detail below with reference to the accompanying drawings.

[0108] Embodiments of the present application provide a DMRS port indication method and apparatus, which are used to satisfy transmission under NC-JT. The methods and devices described in this application are based on the same inventive concept. Since the methods and devices have similar principles for solving problems, the implementation of the devices and methods can be referred to each other, and repeated descriptions will not be repeated here.

[0109] In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing and describing, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0110] In order to describe the technical solutions of the embodiments of the present application more clearly, the DMRS port indication ...

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Abstract

A DMRS port indication method and device are used to satisfy transmission under NC‑JT. The network device determines the DMRS port indication information, and sends the DMRS port indication information; the DMRS port indication information is used to indicate the DMRS port set; the DMRS port set is one of multiple DMRS port sets, and at least one DMRS port set in the multiple DMRS port sets The included DMRS ports belong to multiple CDM groups, and the number of codewords corresponding to each DMRS port set in the multiple DMRS port sets is 1; part or all of the DMRS port sets in the multiple DMRS port sets are the first DMRS port set, Each first DMRS port set includes at least the DMRS port with the largest port number in the first CDM group and the DMRS port with the largest port number in the second CDM group; the terminal device determines the DMRS port according to the DMRS port indication information.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a demodulation reference signal (demodulation reference signal, DMRS) port indication method and apparatus. Background technique [0002] When scheduling data, such as physical downlink shared channel (PDSCH) data, the network device needs to indicate the corresponding DMRS port, including the number of DMRS ports and the DMRS port number. The DMRS ports corresponding to different DMRS port numbers are orthogonal. . The number of DMRS ports is equal to the number of transmission layers of PDSCH data. If different terminal devices occupy the same time-frequency resources to receive PDSCH data, the network device needs to allocate different DMRS port numbers to ensure that the DMRSs are orthogonal. [0003] Currently, the DMRS is divided into two types, and the length of an orthogonal frequency division multiple access (orthogonal frequency division multip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0048H04L5/0053H04L5/0091H04L5/0008H04B7/024H04L5/0023H04L5/0016H04L5/0051H04B7/0413
Inventor 刘显达刘鹍鹏
Owner HUAWEI TECH CO LTD