A method and device for downlink channel measurement
A channel measurement and channel measurement pilot technology, applied in the field of downlink channel measurement, can solve problems such as insufficient Port resources and inability to measure 8-antenna joint channels
Active Publication Date: 2021-04-09
SHANGHAI HUAWEI TECH CO LTD
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Problems solved by technology
For example, taking a single cell with 4 antennas and two cells performing joint transmission as an example, if the existing technology is still used to perform one-to-one mapping CSI-RS measurement, the number of CSI-RS Port resources will be insufficient to measure the joint channel of 8 antennas
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[0034] The embodiment of the present application provides a downlink channel measurement method and device, which are used to perform downlink channel measurement on a terminal when the number of Port resources is insufficient.
[0035] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or descr...
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The embodiment of the present application discloses a downlink channel measurement method, the method includes: the first base station maps at least two first antennas to the same first port of the terminal, and obtains the first mapping result, the at least two first antennas are In the same polarization relationship, the first base station obtains the second mapping result from the second base station, in the second mapping result, at least two second antennas of the second base station are mapped to the same second port of the terminal, and at least two second antennas are the same Polarization relationship, the first base station generates the first mapping matrix according to the first mapping result and the second mapping result, the first base station converts the first mapping matrix into a second mapping matrix according to the pilot sequence, and the first base station and the second base station combine The second mapping matrix performs downlink channel measurement on the terminal by using the channel measurement pilot. In this way, when the number of antennas of the joint base station is greater than the number of ports of the terminal, the joint base station can still perform downlink measurement on the terminal.
Description
technical field [0001] The present application relates to the communication field, and in particular to a method and device for downlink channel measurement. Background technique [0002] Modern wireless communication services have ever-increasing demands on network capacity and communication performance. In the past, methods such as increasing bandwidth, optimizing modulation methods, and code division multiplexing have limited potential to improve spectral efficiency. The 3rd generation partnership project (3GPP) organization introduced the concept of coordinated multi-point transmission (downlink coordinated multi-point, DL CoMP), which aims to improve high-speed data transmission coverage, cell edge rate, and system average speed. One type of DL CoMP technology is to share user service data among multiple base stations and perform joint transmission. This CoMP technology is also called a coherent joint transmit (coherent joint transmit, JT) scheme. [0003] In order t...
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IPC IPC(8): H04B17/309H04B7/024H04B7/0413H04L5/00H04W72/04
CPCH04B7/024H04B7/0413H04L5/0048H04W72/046H04B17/309
Inventor 钱锋楼群芳
Owner SHANGHAI HUAWEI TECH CO LTD