Random access method and device

A random access and random access signal technology, applied in the field of communication, can solve the problems of prolongation of random access, misalignment of sending beam and receiving beam, etc., and achieve the effect of solving delay problem, improving efficiency and measuring accuracy

Active Publication Date: 2017-09-19
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for random access, which solves the problem of misalignment of the sending beam and the receiving beam when the random access of high-frequency band terminals in the prior art uses beamforming to compensate for large-scale signal fading. The problem of long random access delay

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Examples

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no. 1 example

[0074] Such as figure 1 As shown, the first embodiment of the present invention provides a random access method on the terminal side. The random access method includes:

[0075] Step 11, detecting the cell synchronization signal sent by the base station, and determining the direction of arrival of the cell synchronization signal;

[0076] Step 12, according to the direction of arrival of the synchronization signal of the cell, determine the target transmission direction of the random access signal;

[0077] Step 13, sending the random access signal in the target sending direction;

[0078] Step 14: Receive an acknowledgment signal sent by the base station in the incoming direction of the random access signal, and access the base station.

[0079] In the first embodiment of the present invention, the terminal detects the downlink cell synchronization signal sent by the base station, and can obtain the best direction of arrival of the downlink signal, that is, the direction of...

no. 2 example

[0100] Such as figure 2 As shown, the second embodiment of the present invention provides a random access method on the base station side, and the random access method includes:

[0101] Step 21, sending a cell synchronization signal;

[0102] Step 22, detecting the random access signal sent by the terminal in the target sending direction after determining the target sending direction of the random access signal based on the incoming direction of the cell synchronization signal, and determining the incoming wave direction of the random access signal ;

[0103] Step 23: Send an acknowledgment signal in the incoming direction of the random access signal to confirm the access of the terminal.

[0104] In the above embodiments of the present invention, the terminal detects the downlink cell synchronization signal sent by the base station, and can obtain the best direction of arrival of the downlink signal, that is, the direction of arrival of the cell synchronization signal. T...

no. 3 example

[0115] Such as Figure 4 As shown, the third embodiment of the present invention provides a device for random access, including:

[0116] A synchronization signal detection module 41, configured to detect a cell synchronization signal sent by a base station, and determine the direction of arrival of the cell synchronization signal;

[0117] A sending direction determining module 42, configured to determine the target sending direction of the random access signal according to the direction of arrival of the cell synchronization signal;

[0118] An access signal sending module 43, configured to send the random access signal in the target sending direction;

[0119] The receiving module 44 is configured to receive an acknowledgment signal sent by the base station in the incoming direction of the random access signal, and access the base station.

[0120] Specifically, the synchronization signal detection module 41 in the third embodiment of the present invention includes:

[0...

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Abstract

The invention provides a random access method and device. The random access method comprises that a cell synchronization signal sent by a base station is detected, and the incoming wave direction of the cell synchronization signal is determined; according to the incoming wave direction of the cell synchronization signal, a target sending method of a random access signal is determined; the random access signal is sent in the target sending direction; and a confirmation signal sent by the base station in the incoming wave direction of the random access signal is received, and access to the base station is realized. In the access process of the base station and the terminal, an optimal wave beam forming direction is obtained, data transmission between two parties can be carried out via an optimal wave beam in a prior way, and performance of a data link is ensured; and the random access method is low in access time delay in high frequency band and high in practicality.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a random access method and device. Background technique [0002] For high-band (carrier frequency greater than 6GHz) mobile communication networks, both the base station and the terminal need to use highly directional beams and must be aligned with each other. In order to maintain the high gain of the link. Usually, for a connected mobile station, reference information can be used to estimate the quality of the beam to find the best beam matching direction, and the measurement report, such as the beam index, is sent to the base station through control signaling, and the beam direction is tracked to maintain beamforming gain. However, in some cases, the initial beam direction may be random, such as initially accessing the network, recovering from radio link failure, and initiating a handover. and receiving beam pairs are not known in advance. [0003] For random...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W74/00H04W74/08H04B7/06
Inventor 王蒙军杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD
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