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A reference signal mapping method, network device, and terminal device

A mapping method and technology for terminal equipment, applied in the field of communication, can solve problems such as overhead, impact port, and layer number indication overhead, etc.

Active Publication Date: 2020-07-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Uplink and downlink DMRS port mapping will affect the indication overhead of port and layer numbers, if the design is not reasonable, it may cause unnecessary overhead

Method used

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  • A reference signal mapping method, network device, and terminal device
  • A reference signal mapping method, network device, and terminal device
  • A reference signal mapping method, network device, and terminal device

Examples

Experimental program
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Embodiment 1

[0187] In Embodiment 1 of the present application, based on the DL and UL DMRS design principles already determined in the NR standard, combined with the DL DMRS design of each clock, the DL and UL DMRS port mapping is reasonably designed to avoid unnecessary indication overhead. The NR standard determines that DL DMRS port multiplexing adopts FDM (including comb), CDM (including OCC and cyclic shift) and TDM. According to several main DL DMRS designs at present, it can be seen that when the number of DL DMRS ports is small, FDM is mainly used for multiplexing.

[0188] Since the NR standard has agreed to adopt the common structure of uplink and downlink DMRS for CP-OFDM, it is considered that when designing the port mapping method of uplink DMRS and the indication method of port and space layer (layer), the port mapping of downlink DMRS and the port mapping of downlink DMRS will be used for reference. Indication method of port and space layer. If the uplink DMRS and downlink...

Embodiment 2

[0229] The main design principle of this embodiment is still to make at least one port in all port configurations corresponding to n in the downlink DMRS space layer number and at least one port in all port configurations corresponding to m in the uplink DMRS space layer number The resources corresponding to the configuration are different. However, in this embodiment, it is assumed that the port mapping of the uplink and downlink DMRS uses a similar rule, that is, some or all port numbers of the uplink DMRS and downlink DMRS are mapped to the same frequency domain position from low to high. In this case, by designing the uplink and downlink DMRS ports and the indication content of the number of space layers, it is also possible to realize that the configuration of at least one port with a number of space layers n is different from the configuration corresponding to at least one port configuration with an uplink number of space layers m. , that is, the configuration of the upl...

Embodiment 3

[0256] In Embodiments 1 and 2, it is assumed that the uplink and downlink DMRS are orthogonal using the FDM method. In this embodiment, it is considered that the uplink and downlink DMRS are orthogonal using the CDM (including OCC or cyclic shift) method. It is assumed that the DL DMRS is multiplexed using the following method, that is, port x0-x3 is multiplexed using the FDM method, and port x4-x7 and port x0-x3 are multiplexed on the same RE using the CDM method. A similar multiplexing method is also used in the uplink, that is, port y0-y3 is multiplexed using the FDM method, and port y4-y7 and port y0-y3 are multiplexed using the CDM method on the same RE, such as Figure 15 shown.

[0257] Assuming that the CDM is frequency-domain or time-domain OCC (the method shown in the schematic diagram is the frequency-domain OCC method, and this embodiment is also applicable to the time-domain OCC method), the multiplexing of two ports only requires OCC with a length of 2, respecti...

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Abstract

The application discloses a reference signal mapping method, network equipment, and terminal equipment. The terminal equipment is configured with a first configuration relation used during reception of a downlink DMRS and a second configuration relation during transmission of an uplink DMRS. In the downlink direction, the terminal equipment receives configuration information of the network equipment, determines a port number mapping the downlink DMRS according to the first configuration relation, and receives the DMRS at a downlink DMRS port. In the uplink direction, the terminal equipment receives the configuration information of the network equipment, determining a port number mapping the uplink DMRS according to the second configuration relation, and sends the DMRS at an uplink DMRS port. A partial port configuration of the first configuration relation is orthogonal to a partial port configuration of the second configuration relation so that a downlink DMRS port of a first cell is orthogonal to an uplink DMRS port of a second cell, and uplinks and downlinks of different cells can simultaneously and correctly transmit and receive data on the same time frequency resources.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a reference signal mapping method, network equipment, and terminal equipment. Background technique [0002] Enhanced Long Term Evolution (English: Long Term Evolution Advanced, referred to as: LTE-A) in the downlink data using Orthogonal Frequency Division Multiplexing (English: Orthogonal Frequency Division Multiplexing, referred to as: OFDM) modulation, uplink data using discrete Fourier transform Spread spectrum orthogonal frequency division multiplexing (English: Discrete FourierTransform spread Orthogonal Frequency Division Multiplexing, referred to as: DFT-s-OFDM) modulation. The downlink demodulation reference signal (English: Demodulation Reference Signal, DMRS for short) in LTE-A has a maximum of 8 ports, and the corresponding port numbers are 7-14. The downlink DMRS uses random noise (English: Pseudo-noise, abbreviated: PN) sequence, and maps to sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0048
Inventor 吴明张弛秦熠
Owner HUAWEI TECH CO LTD
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