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Random access method and system

A random access preamble and random access request technology, applied in the field of communication, can solve the problem of long time taken for synchronization recovery processing, and achieve the effects of improving user experience, shortening delay, and reducing hardware requirements

Inactive Publication Date: 2010-07-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention is proposed in consideration of the problem that the UE and the network side take a long time to restore synchronization between the UE and the network side in the related art. Therefore, the main purpose of the present invention is to provide a random access method and system to solve the above-mentioned problems

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Embodiment Construction

[0029] Functional Overview

[0030] As mentioned above, when the uplink between the network side and the UE is out of sync, the UE needs to release the PUCCH (Physical Uplink Common Control Channel) and SRS (Reference Signal) resources allocated by the network side. If the network side continues to perform data transmission with the UE, the network side needs to Uplink synchronization with UE, and reallocate and send PUCCH and SRS resources for UE, that is, if the network side needs to send downlink data to UE in RRC connection state but out of uplink synchronization, it will first initiate a random access process to the UE. Based on this, the present invention provides an improved random access scheme. The basic idea of ​​the present invention is: after the network side receives the random access message from the UE, it will allocate SRS resources and PUCCH resources for the UE, and the allocated SRS resources and PUCCH resources are sent to the UE in the random access respon...

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Abstract

The invention discloses a random access method and a random access system. The method comprises the following steps that: a network side sends a special random access leading index of a terminal to the terminal; the terminal sends a random access request to the network side according to the received special random access leading index; and the network side allocates physical uplink common control channel resource and reference signal resource for the terminal according to the random access request and sends the allocated physical uplink common control channel resource and reference signal resource to the terminal. The technical scheme of the invention solves the problem that synchronous restore processing of UE and a network side takes long time, thereby shortening data transmission delay, reducing the requirements of network side equipment on hardware and improving user experience.

Description

technical field [0001] The present invention relates to the communication field, in particular to a random access method and system. Background technique [0002] figure 1 is a structural block diagram of a Long Term Evolution (referred to as LTE) mobile communication system, such as figure 1 As shown, the system includes a core network and an access network, wherein the core network is responsible for interconnection with other communication systems, bearer management, authentication and authentication, and route selection, including mobile management entities and service gateways; the access network is used for Responsible for radio resource management, IP header compression, user data encryption, measurement, including multiple eNBs. Among them, the core network and the access network perform data interconnection and intercommunication through the S1 (S1 is the interface between the core network and the access network) interface, and the different eNBs in the access net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W72/04
CPCH04W74/002H04W74/0833H04W72/04H04W74/0838
Inventor 张现周易鸿锋张文英
Owner ZTE CORP