Competitive random access method, system and evolution base station

A technology of random access and random access process, applied in the field of evolution base station, competition random access field

Inactive Publication Date: 2010-03-03
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In view of this, the present invention provides a contention random access method, which can avoid the problems that occur when users collide in the prior art

Method used

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  • Competitive random access method, system and evolution base station
  • Competitive random access method, system and evolution base station
  • Competitive random access method, system and evolution base station

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Experimental program
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Embodiment Construction

[0045] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0046] The present invention is a contention random access scheme, and its basic idea is: when the eNB detects that multiple UEs have selected the same random access resource within the user detection window, it does not send random access responses to these collided UEs message, so that the collided UE reselects random access resources and initiates the random access procedure again.

[0047] image 3 A flow chart of the contention random access method of the present invention is shown. Such as image 3 As shown, the process includes the following steps:

[0048] Step 301: UE selects a random access resource, and initiates a random access procedure.

[0049] Step 302: the eNB detects the random access preamble sent by the UE within the user detection window.

[0050] Step 303: When the eNB detects that multiple UEs select the same random access resou...

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PUM

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Abstract

The invention discloses a competitive random access method, a system and an eNB. The method comprises the following steps: the eNB detection initiates user equipment UE of the random access process; when a user detection window detects that a plurality of UEs select same random access resources for initiating random access process simultaneously, random access response messages are not sent to theUEs selecting the same random resources simultaneously; and the UEs initiating the random access process can not receive the random access response messages in a random access response window, the random access resources are reselected, and the random access process is initiated again. The invention can complete the random access process successfully, avoid the uplink resources distributed for colliding UEs from being wasted in the random access response process, and reduce the time delay of random access.

Description

technical field [0001] The present invention relates to media access control technology, in particular to a method and system for contention random access and an evolved base station (eNB). Background technique [0002] In the current Long Term Evolution (LTE, Long Term Evolution) system, Media Access Control (MAC, Media Access Control) adopts a random access technology. Random access technology is divided into two modes: contention random access and non-contention random access. Most of the current communication systems adopt the contention random access mode. [0003] figure 1 It is a schematic diagram of a random access process in a contention mode. Such as figure 1 As shown, its processing flow is: [0004] Step 1: User equipment (UE, User Equipment) sends a random access preamble (Random Access Preamble) on a physical random access channel (PRACH, Physical Random Access Channel). [0005] In this step, the MAC layer of the UE randomly selects the random access pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 胡静
Owner POTEVIO INFORMATION TECH CO LTD
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