Beam recovery method and device for millimeter wave communication system

A technology of a communication system and a recovery method, applied in directions such as transmission systems, diversity/multi-antenna systems, space transmit diversity, etc., can solve problems such as high recovery delay and overhead, and achieve the effect of reducing recovery delay and resource overhead

Active Publication Date: 2018-01-19
TSINGHUA UNIV
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  • Abstract
  • Description
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Problems solved by technology

The existing technology generally adopts the beam recovery method based on exhaustive search, which needs to search M*N beam pairs to complete the beam recovery, which will bring high recovery delay and overhead in the scenario where frequent beam recovery is required

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  • Beam recovery method and device for millimeter wave communication system
  • Beam recovery method and device for millimeter wave communication system
  • Beam recovery method and device for millimeter wave communication system

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] In the millimeter wave communication system, if the base station uses N directional beams, the N directional beams of the base station respectively cover a fan-shaped area, and the N fan-shaped areas form a circular area with the base station as the center of the circle. The areas mentioned in the embodiments of the present invention all refer to sectoral areas c...

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Abstract

The invention provides a beam recovery method and a beam recovery device for a millimeter wave communication system. The method comprises the step of when beam failure information sent by a user sideis received, sequentially switching a current beam pair to one beam pair in a specified beam pair set, until quality of service (QoS) of the switched beam pair is higher than a preset threshold, wherein the beam pair in the specified beam pair set is acquired by screening the beam pairs in a first area and the beam pairs in an adjacent area of the first area, and the first area is the area where the user side is located before beam failure. Beam recovery can be completed by only fewer times of switching when the current beam is sequentially switched to the beam pair in the specified beam pairset; compared with a traditional recovery method based on exhaustive search, the method provided by the invention is greatly reduced in recovery delay and resource overhead needed by beam recovery.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and more specifically, relate to a beam restoration method and device for a millimeter wave communication system. Background technique [0002] With the development of economy and society, people's demand for communication speed is showing an exponential growth trend. Millimeter wave is regarded as a key technology for the next generation wireless communication system (5G) due to its abundant spectrum resources. The wavelength of the millimeter-wave frequency band is relatively short. According to the antenna theory, the antenna size is also small, and a large number of antennas can be integrated in a small area, which is convenient for compensating the high transmission loss of the millimeter-wave frequency band through beamforming technology. [0003] Consider an indoor millimeter-wave system with a base station and a user. The base station uses N directional bea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04B17/309
Inventor 刘福良赵培尧王昭诚
Owner TSINGHUA UNIV
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