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Random access method

A technology of random access and beam transmission, applied in electrical components, wireless communication and other directions, it can solve the problems of low coverage and small coverage area.

Inactive Publication Date: 2018-05-01
BEIJING XINWEI TELECOM TECH
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  • Summary
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  • Description
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Problems solved by technology

The introduction of a large-scale antenna array can enable the system to obtain higher antenna array gain and improve the quality of signal reception, but its disadvantage is that the coverage is low, and the stronger the array gain, the smaller the area covered, which requires only better Only when they are aligned in the direction of each other can normal communication be carried out, so the characteristics of large-scale antenna arrays need to be fully considered in system design

Method used

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Embodiment

[0056] Assuming that the number of beams on the base station side is N, the terminal can determine one or more downlink transmit beams with better reception quality by detecting the synchronization signal. The following configurations are predefined on the base station side and the terminal side:

[0057] Configuration 1: (Applicable scenario: The beam reciprocity of uplink and downlink exists)

[0058] like image 3 As shown, each downlink beam is bound to one random access resource. The terminal can determine its optimal downlink transmission beam k by detecting the downlink synchronization signal (the synchronization signal is sent through N beams), and initiate random access on its corresponding random access resource, such as Figure 4 shown.

[0059] Configuration 2: (Applicable scenario: Beam training on the base station side)

[0060] like image 3 As shown, each downlink beam is bound to one random access resource. The terminal can determine X optimal downlink t...

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Abstract

The invention discloses a random access method which comprises the steps of: on a base station side, binding downlink sent beams with random access resources; issuing random access resource configuration information to a terminal side by broadcast information; on the terminal side, receiving the random access resource configuration information issued by the broadcast information; by detecting a downlink synchronization signal, determining an optimal downlink sent beam; and determining the random access resource corresponding to the optimal downlink sent beam and initiating random access. The random access method disclosed by the invention can relatively flexibly support various random access resource configurations, meanwhile, is applicable to various scenes, and meets different demands ina massive antenna scene.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a random access method. Background technique [0002] The random access process in the current mobile communication network is mainly designed for low frequency bands, such as in 4GLTE / LTE-A (4 th In generation long term evolution / LTE-advanced), the transceiver signals of random access are all sent omnidirectionally, and its design is relatively simple. [0003] However, in the 5G NR (5G NR) currently being standardized th generation New Radio accesstechnology) needs to support higher frequency bands. Since the path loss in the high frequency band is much larger than that in the low frequency band, a large-scale antenna array is required to counteract the path loss. The introduction of a large-scale antenna array can enable the system to obtain higher antenna array gain and improve signal reception quality, but its disadvantage is that the coverage is low. The stronge...

Claims

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Application Information

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IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/006H04W74/0833
Inventor 董付现孙鹏
Owner BEIJING XINWEI TELECOM TECH
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