Random access method and device

A technology of random access and channel access, applied in connection management, electrical components, wireless communication, etc., can solve the problem of low random access efficiency

Active Publication Date: 2020-08-28
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] and NR-U due to needs and other systems (for example, wireless fidelity (wireless fidelity, wifi), authorized spectrum assisted access (licensed assisted access, LAA), etc. ) friendly coexistence, fair competition for the available unlicensed frequency band, therefore, the efficiency of random access is not high

Method used

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Embodiment Construction

[0075] The technical solution in this application will be described below with reference to the accompanying drawings.

[0076] The technical solution of the present application is mainly applied to a wireless communication system operating in an unlicensed (unlicensed) frequency band, for example, an unlicensed system of a new radio (NR) (hereinafter referred to as NR-U). In addition, it can also be applied to other communication systems where one communication device needs to indicate the channel access type to another communication device.

[0077]The wireless communication systems mentioned in this application include but are not limited to: global system for mobile communications (GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division Multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE...

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Abstract

The invention provides a random access method. The method comprises: a network device determining a first channel access type that should be adopted when a terminal device accesses a first unlicensedfrequency band, the first channel access type belonging to one of channel access types of unlicensed frequency bands, the channel access type of the unlicensed frequency band comprising an FBE and a load-based device LBE; and the network device sending a first system message to the terminal device, the first system message carrying first indication information, and the first indication informationbeing used for indicating the first channel access type; and the terminal device acquiring the first system message from the network device, and accessing the first unlicensed frequency band by adopting the first channel access type indicated by the first indication information.

Description

technical field [0001] The present application relates to the field of wireless communication, and more specifically, to a random access method and device for an unlicensed frequency band. Background technique [0002] In a wireless communication system, a terminal device can obtain downlink synchronization with a cell through cell search, so as to receive downlink data from a network device. However, the terminal device can perform uplink transmission only after obtaining uplink synchronization with the cell. A terminal device can establish a connection with a cell and obtain uplink synchronization through a random access (random access) process. [0003] With the continuous evolution of communication technology, authorized spectrum resources are becoming more and more limited. The frequency band of the wireless communication system has been extended from the licensed frequency band to the unlicensed (unlicensed) frequency band. A communication system operating in an unl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04W74/08H04W76/27
CPCH04W74/0858H04W74/002H04W76/27H04W74/008H04W74/006H04W74/0808H04W16/14H04W74/0816H04W74/0841
Inventor 范巍巍默罕默德·阿代尔·赛勒穆大卫·简-玛丽·马瑞泽
Owner HUAWEI TECH CO LTD
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