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Random access method, user equipment and base station equipment

A technology of random access response and preamble sequence, which is applied in the directions of multiple use of transmission paths, pilot signal allocation, digital transmission systems, etc. The effect of reducing the request delay and reducing the delay

Active Publication Date: 2019-01-01
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is: the beam failure recovery process in the prior art is based on contention-free, but it does not solve how to allocate contention-free time-frequency resources and sequence resources for different terminals with low signaling overhead

Method used

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  • Random access method, user equipment and base station equipment
  • Random access method, user equipment and base station equipment
  • Random access method, user equipment and base station equipment

Examples

Experimental program
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Embodiment 1

[0077] In this embodiment, a resource configuration method of a beam failure recovery request will be introduced in conjunction with a specific system. Assuming that the base station works in the high frequency band, multi-beam operation is used to compensate for the large path loss. The beam failure recovery request uses dedicated time-frequency resources and sequence resources. The time-frequency resources are similar to the time-frequency resources of the random access channel, and can be distinguished from the time-frequency resources of the random access channel through frequency division multiplexing, or through time division multiplexing. Distinguish by means, etc.

[0078] The base station configures resources for the beam failure recovery request by using high-layer signaling or downlink control information. The resources include time-frequency resources and sequence resources. Firstly, the sequence resource allocation method provided in this embodiment is described...

Embodiment 2

[0110] In this embodiment, a beam failure recovery process will be introduced in conjunction with a specific system. In this embodiment, the beam failure recovery process is briefly described as follows:

[0111] The terminal reads the dedicated channel time-frequency resources and preamble resources used in the beam failure recovery process.

[0112] If the terminal needs to send a beam failure recovery request, it determines and selects downlink candidate beams according to downlink measurement results, and selects time-frequency resources and preamble sequences according to the correspondence between downlink transmission beams and time-frequency resources / preamble sequences. If the downlink candidate beam selected by the terminal according to the measurement results cannot select the corresponding time-frequency resource / preamble sequence (for example, the downlink transmission beam is not in the corresponding relationship list), the terminal chooses to fall back to the co...

Embodiment 3

[0124] In this embodiment, a method for requesting system information transmitted on demand will be introduced in conjunction with a specific system. In this embodiment, the process for the terminal to obtain the on-demand transmission system information is as follows:

[0125] The terminal selects the preamble to be transmitted through the correspondence between the system information or system information group to be transmitted on demand and the random access preamble;

[0126] The terminal sends the corresponding preamble sequence in the random access channel;

[0127] The terminal detects the random access response in the downlink control channel, and obtains the time-frequency resource position of the system information.

[0128] In this embodiment, it is assumed that the base station reserves a part of the preamble sequence and establishes a corresponding relationship with corresponding system information or system information group. The corresponding relationship may...

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Abstract

The invention discloses a beam failure recovery request method, which comprises the steps of obtaining channel time-frequency resource allocation information and preamble sequence configuration information for transmission of a beam failure recovery request; selecting candidate downlink transmission beams according to a measurement result; selecting a channel time-frequency resource and / or preamble sequence according to a corresponding relationship between the downlink transmission beams and channel time-frequency resources and / or preamble sequences, the time-frequency resource allocation information and the preamble sequence configuration information; and transmitting the preamble sequence on the channel time-frequency resource. Compared with the prior art, optimization is performed on the resource allocation and process in allusion to the beam failure recovery request, the signaling overhead can be effectively reduced, and the access time delay is reduced.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to a random access method, user equipment, and base station equipment. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and the Internet of Things (IoT, internet of things), it brings unprecedented challenges to future mobile communication technologies. For example, according to the report ITU-R M.[IMT.BEYOND 2020.TRAFFIC] of the International Telecommunication Union ITU, it can be predicted that by 2020, the growth of mobile traffic will increase by nearly 1,000 times compared to 2010 (4G era), and the number of user equipment connections will also increase. It will exceed 17 billion. As massive IoT devices gradually penetrate into mobile communication networks, the number of connected devices will become even more astonishing. In response to this unprecedented...

Claims

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Application Information

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IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/006H04W74/0833H04L5/0048H04L5/0094
Inventor 钱辰熊琦喻斌
Owner BEIJING SAMSUNG TELECOM R&D CENT
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