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Random access method and device

A random access and random access request technology, applied in the field of communication, can solve the problems of large time delay, achieve low time delay, highly reliable random access process, and solve the effect of large time delay

Inactive Publication Date: 2018-05-25
BEIJING XINWEI TELECOM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a random access method and device to at least solve the technical problem that the prior art needs to go through four steps to realize the random access process and cause a large time delay

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0023] figure 1 It is a flowchart of a random access method according to an embodiment of the present invention, and the method includes the following steps:

[0024] Step S102, receiving the system synchronization signal and key system information broadcast by the base station, wherein the key system information includes at least: physical random access channel resources available in the system, preamble sequence pool, UEID contained in the random access request packet Code length, spreading sequence pool;

[0025] Step S104, based on the system synchronization signal and system key information, sending a random access request data packet to the base station;

[0026] Step S106, receiving a random access response message and uplink transmission resource allocation information returned by the base station.

[0027] It can be seen from the above that, in the above embodiments of the present application, before the UE enters the random access process, it first receives the sys...

Embodiment 2

[0062] Figure 8 It is a flowchart of another random access method according to an embodiment of the present invention, such as Figure 8 As shown, the method includes the following steps:

[0063] Step S802, sending the system synchronization signal and key system information in the form of broadcast, wherein the key system information includes at least: physical random access channel resources available in the system, preamble sequence pool, UE contained in the random access request packet ID code length, spreading sequence pool;

[0064] Step S804, receiving a random access request packet from the UE;

[0065] Step S806, sending a random access response message and uplink transmission resource allocation information to the UE.

Embodiment 3

[0067] According to an embodiment of the present invention, an embodiment of a random access device is also provided. The random access method in Embodiment 1 of the present invention can be implemented in the device in Embodiment 3 of the present invention.

[0068] Figure 9 is a schematic diagram of a random access device according to an embodiment of the present invention, such as Figure 9 As shown, the device includes: a first receiving module 901 , a first sending module 903 and a second receiving module 905 . in,

[0069] The first receiving module 901 receives the system synchronization signal and system key information broadcast by the base station, wherein the system key information includes at least: available physical random access channel resources in the system, preamble sequence pool, random access request data packet Included UE ID code length, spreading sequence pool;

[0070] The first sending module 903, based on the system synchronization signal and sy...

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PUM

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Abstract

The invention discloses a random access method and device. The method comprises the following steps of receiving a system synchronization signal and a system key information which are sent by a base station through broadcasting, wherein the system key information at least comprises physical random access channel resources available in the system, a preamble sequence pool, and a user equipment (UE)ID code length and a spread spectrum sequence pool which are included in a random access request data packet; sending the random access request data packet to the base station based on the system synchronization signal and the system key information; and receiving a random access response message and uplink transmission resource allocation information which are returned by the base station. The technical problem that the time delay is large due to the fact that a random access process needs to be achieved through four steps in the prior art is solved.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a random access method and device. Background technique [0002] In LTE, LTE-A, and LTE-A-Pro, UE needs to access a cell through a random access process before initiating communication. The currently used random access process includes four steps: first, the UE sends a random access preamble to the base station; second, after the base station detects that the UE has sent an access preamble, it sends a random access response to the UE to inform The uplink resource information that the UE can use; the third step, after receiving the random access response, the UE sends a scheduling message in the uplink resource specified by the random access response message, and carries a UE-specific identification information at the same time; the fourth step, The base station sends a contention decision message to the UE and at the same time allocates uplink transmission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W72/04H04L5/00
CPCH04L5/0048H04W74/0833H04W72/21
Inventor 刘兵朝孙鹏
Owner BEIJING XINWEI TELECOM TECH
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