Random access method and device

A technology of random access and random access preamble, applied in wireless communication, electrical components and other directions, can solve problems such as low efficiency

Active Publication Date: 2019-01-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a random access method and device for solving the problem of low efficiency of the random access process

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 4

[0283] Embodiment 4: For example, Table 9 and Table 10 show that when the subcarrier spacing is 30kHz and the maximum number of downlink signal blocks is 8, the random access configuration index and [the time slot where the random access resource is located, the format of the random access preamble , system frame position] is a mapping relationship between this combination.

[0284] The time slots where the random access resources are located in Table 9 are consecutive time slots.

[0285] Table 9

[0286]

[0287]

[0288]

[0289] The time slots where the random access resources are located in Table 10 are discontinuous time slots.

[0290] Table 10

[0291]

[0292]

[0293]

[0294] In this case, the downlink signal block needs to occupy 2 milliseconds (ms), so the random access resource cannot be placed at the time of the downlink signal block in the system frame. In addition, for the scenario where the subcarrier spacing is 30kHz, and considering the...

Embodiment 5

[0305] Embodiment 5: As an example, Table 11 and Table 12 show that when the subcarrier spacing is 60kHz and the maximum number of downlink signal blocks is 64, the random access configuration index and [the time slot where the random access resource is located, the format of the random access preamble , system frame position] is a mapping relationship between this combination.

[0306] The random access resources in Table 11 are placed in one or more of the 20th to 29th time slots.

[0307] Table 11

[0308]

[0309]

[0310]

[0311] Random access resources can be placed in all positions in the system frame in Table 12.

[0312] Table 12

[0313]

[0314]

[0315]

[0316] When the subcarrier interval is 60 kHz and the maximum number of downlink signal blocks is 64, the corresponding downlink signal blocks need to occupy 5 ms.

[0317] In one embodiment, the uplink and downlink are time-divided on the same frequency band, and random access resources cann...

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Abstract

The invention provides a random access method and device. The method comprises the following steps: a terminal receives first indication information sent by a network equipment, wherein the first indication information is used for indicating a random access configuration index; the terminal determines a random access resource according to the random access configuration index; a random access resource is determined corresponding to the downlink signal according to an association relationship between the random access resource and the downlink signal; according to the random access resource corresponding to the downlink signal, a random access preamble is sent to the network equipment. The invention realizes the random access configuration index indicated by the network equipment, determines the random access resource, and further determines the random access resource corresponding to the downlink signal according to the correlation relationship between the downlink signal and the random access resource, thereby avoiding the problem that the terminal blindly attempts the random access resource when sending the random access preamble.

Description

technical field [0001] The present application relates to the field of wireless communication, and in particular to a random access method and device. Background technique [0002] In a multi-beam network, before the base station communicates with the terminal, it first needs to perform uplink synchronization and downlink synchronization. In the downlink synchronization process, the base station sends downlink synchronization signals through multiple transmission beams, and the terminal uses one or more reception beams to receive and detect the downlink synchronization signals, and determine the best downlink transmission beam and reception beam pair, downlink time and system information. The uplink synchronization is accomplished by means of a random access process. The terminal first sends a random access signal, and the base station obtains the best uplink sending beam and receiving beam pair, uplink time, etc. by detecting the random access signal, and realizes the upli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/002H04W74/006H04W74/008H04W74/0833H04W72/23H04W74/08
Inventor 颜矛黄煌高宽栋
Owner HUAWEI TECH CO LTD
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