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Non-competitive random access method and device

A technology of random access and random access message, applied in the field of communication, can solve the problems of waste of physical resources, UE disconnection, UERRC connection re-establishment, etc. Effect

Active Publication Date: 2016-06-15
CHENGDU TD TECH LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, in the prior art, when the UE has not received the PDCCHORDER, if the period of the timer is too large, that is, the delay in sending the PDCCHORDER to the UE again is too long, which may cause the UE to drop the link; On the other hand, if the period of the timer is too small, it is very likely that a new random access process will be started before the random access process initiated by the current PDCCHORDER ends, so that multiple random access processes will be performed simultaneously. , resulting in a waste of physical resources, and may cause the UE to initiate RRC connection re-establishment

Method used

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0038] The random access process in the prior art is as follows:

[0039] 1) The eNodeB sends the PDCCHORDER to the UE in the nth subframe, authorizes a part of PREMBLE resources to the UE and triggers the UE to initiate a random access procedure.

[0040] 2) After receiving the PDCCHORDER, the UE sends the first random access message (MSG1) to t...

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Abstract

Embodiments of the present invention provide a non-contention random access method and device. In the non-contention random access method of the present invention, eNodeB sets different timers according to the states of different stages of non-contention random access, so that not only The synchronization delay of the UE and the saving of physical resources can also completely solve the problems of UE link loss and RRC reconstruction.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a non-contention random access method and device. Background technique [0002] When a user equipment (User Equipment, UE for short) is in a switching band or channel fading is very large, the UE may lose synchronization. When the UE loses synchronization, the evolved base station (EvolvedNodeB, eNodeB for short) sends a Physical Downlink Control Channel (PhysicalDownlinkControlChannel, PDCCH for short) order (ORDER) to the UE, so that the UE initiates non-contention random access, so that The UE is synchronized with the eNodeB. [0003] In the prior art, the eNodeB controls the transmission of the PDCCHORDER by setting the period of the timer and the maximum number of transmissions of the PDCCHORDER. Specifically, the eNodeB starts the timer after sending the PDCCHORDER. If the eNodeB does not send the PDCCHORDER before the timer expires If MSG3 is decode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 魏立梅李文情朱玉梅赵连鹏袁乃华范晨
Owner CHENGDU TD TECH LTD
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