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Methods and devices in UE and base station supporting synchronization signal

By using FDM multiplexing technology in large-scale MIMO systems, the problems of increased synchronization signal transmission time and difficulty in blind detection are solved, and efficient synchronization signal and broadcast signal reception is achieved, which is suitable for multi-antenna and single-antenna transmission.

Active Publication Date: 2020-12-11
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The beams formed by multi-antenna beamforming are generally narrow, so the coverage of synchronization signals is a problem that needs to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0291] Embodiment 1 illustrates the flow chart of wireless transmission, as attached figure 1 shown. attached figure 1 In , the base station N1 is the serving cell maintenance base station of the UE U2.

[0292] For N1, send {first wireless signal, K1 first synchronization signals} in step S11; send {second wireless signal, K2 second synchronization signals} in step S12; send {first reference signal in step S13 signal, K5 second reference signals}; send {third wireless signal, K6 fourth wireless signal} in step S14.

[0293] For U2, at least the former of {the first wireless signal, K1 first synchronization signals} is received in step S21; at least the former of {the second wireless signal, K2 second synchronization signals} is received in step S22; At least the former of {first reference signal, K5 second reference signals} is received in step S23; and at least the former of {third wireless signal, K6 fourth wireless signal} is received in step S24.

[0294] In Embodimen...

Embodiment 2

[0316] Embodiment 2 illustrates {first time-frequency resource, second time-frequency resource, K candidate resources, resource mapping of K1 first synchronization signals, given time-frequency resource, K possible resources, given reference resource} , and the schematic diagram of the association between the position of the second time-frequency resource in the K candidate resources and {the first time length, R1 antenna ports}, as shown in the attached figure 2 mentioned.

[0317]In Embodiment 2, the first synchronization signal in the first wireless signal and the K1 first synchronization signals form K3 first synchronization signals, and K3 is the sum of K1 and 1. The time domain resources occupied by the K3 first synchronization signals are orthogonal. The K candidate resources completely overlap in the time domain and are orthogonal in the frequency domain. The first time-frequency resource and the K candidate resources occupy the same time resource in the time domain...

Embodiment 3

[0335] Embodiment 3 illustrates the schematic diagram of the antenna structure, as attached image 3 shown.

[0336] attached image 3 , the communication node is equipped with G antenna groups, and the G antenna groups correspond to G RF (Radio Frequency, radio frequency) chains (chains) respectively. One antenna group includes V antennas, G is a positive integer, and V is a positive integer. For 1≤g≤G, the antennas in antenna group #g include the attached image 3 In {Ant g_1,Ant g_2,...,Ant g_V}, the antennas in the antenna group #g pass the analog beamforming vector c g Perform analog beamforming, where c g is a V×1-dimensional vector, and the analog beamforming vector corresponding to one antenna group is composed of the weighting coefficients on the V antennas included in the antenna group, that is, c g =[c g,1 …c g,V ].

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Abstract

The invention discloses methods and devices in UE and a base station supporting synchronization signals. The UE firstly receives a first wireless signal on a first time-frequency resource, and then receives a second wireless signal on a second time-frequency resource, wherein the second time-frequency resource is one of K candidate resources, and the position of the second time-frequency resourcein the K candidate resources is used for determining at least one of {a first time length, R1 antenna ports}, K is a positive integer greater than 1, at least one of {the length of the CP corresponding to the first wireless signal and the length of the CP corresponding to the second wireless signal} is equal to the first time length, and R1 is a positive integer.

Description

[0001] This application is a divisional application of the following original application: [0002] --The filing date of the original application: 2016.10.15 [0003] --Application number of the original application: 201610899612.8 [0004] --The name of the invention of the original application: a method and device in a UE and a base station supporting synchronization signals technical field [0005] The present invention relates to a method and device for downlink transmission in a wireless communication system supporting synchronization signals, in particular to a solution and device for downlink transmission in a wireless communication system using MIMO (Multiple Input Multiple Output) technology. Background technique [0006] Massive MIMO has become a research hotspot in the next generation of mobile communications. In large-scale MIMO, multiple antennas use beamforming to form narrower beams pointing in a specific direction to improve communication quality. The beam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04L27/26
CPCH04B7/0413H04L27/2655
Owner SHANGHAI LANGBO COMM TECH CO LTD