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Processing method for cell reselection in establishment process of RRC connection and device

A technology for cell reselection and connection establishment, applied in the field of communication, can solve problems such as call failure and conflict, and achieve the effect of improving the success rate of calls

Inactive Publication Date: 2011-08-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for processing cell reselection during RRC connection establishment, which are used to solve the conflict between MM connection management process and MM special process caused by cell reselection during RRC connection establishment in the prior art, and further Problems causing calls to fail

Method used

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  • Processing method for cell reselection in establishment process of RRC connection and device
  • Processing method for cell reselection in establishment process of RRC connection and device
  • Processing method for cell reselection in establishment process of RRC connection and device

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specific Embodiment 1

[0059] Specific embodiment 1, this embodiment elaborates in detail the process of cell reselection when a measurement trigger occurs during the establishment of an RRC connection. Specifically, if during the RRC connection establishment process, the physical layer reports a measurement result indicating that a better cell has been found, thereby causing RRC to trigger cell reselection triggered by the measurement result, the AS (Access Stratum, access layer) layer is reselecting The NAS (Non-Access Stratum, non-access stratum) is notified before the cell reselection during the RRC connection establishment process, and the NAS layer caches the connection establishment request message. After the AS layer reports the cell information to the NAS layer, the NAS layer according to the reported Determine whether the RA / LA has changed based on the cell information. If there is no change, the cached connection establishment request message is sent to the AS layer again, and the AS initi...

specific Embodiment 2

[0076] Specific embodiment 2, this embodiment elaborates in detail the processing procedure of UE reselecting a cell according to the specified frequency point in the RRC connection establishment message sent by UTRAN.

[0077]Specifically, if during RRC connection establishment, UE sends an RRC connection request message to UTRAN, and UTRAN sends an RRC connection establishment message including specified frequency point information to UE, so that UE performs cell reselection processing on a specified carrier frequency, if UE successfully selects the cell on the specified carrier frequency, RRC configures the relevant physical layer resources, assembles the RRC connection establishment completion message, and sends the RRC connection establishment completion message to UTRAN on the uplink DCCH; if the UE fails to successfully select the specified When the cell on the carrier frequency is connected, the RRC notifies the NAS layer that the RRC has cell reselection, and reports t...

specific Embodiment 3

[0096] Specific embodiment 3, this embodiment elaborates in detail the realization process that UTRAN sends an RRC connection rejection message to UE, and UE performs specified frequency point cell reselection or specified system reselection processing according to the RRC connection rejection message.

[0097] Specifically, if the UE sends an RRC connection request message to the UTRAN during the establishment of the RRC connection, due to network congestion, the UTRAN may send an RRC connection rejection message to the UE, and designate the UE to access other carrier frequencies or standards. If UTRAN designates the UE to access other carrier frequencies, RRC needs to judge whether the counter V300 exceeds the threshold value N300, if V300>N300, then terminate the RRC connection establishment, otherwise notify the NAS layer RRC of cell reselection. If the UE reselects to the specified carrier frequency and successfully camps on, RRC reports the cell information to the NAS lay...

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Abstract

The invention discloses a processing method for cell reselection in the establishment process of RRC connection and a device. The processing method comprises the following steps: when cell reselectionoccurs in the establishment process of RRC connection of a user terminal and UTRAN, an access layer of the user terminal notifies a non-access layer of the cell reselection in the establishment process of RRC connection; the non-access layer caches the connection establishing request, detects whether cell information reported by the access layer is received in real time, and judges whether the process of connection management of mobile management (MM) and the special process of MM conflict after the reported cell information is received, if so, the special process of MM is initiated, and after the special process is ended, the cached connection establishing request is reinitiated or a call is waited to be reinitiated by a network side. The method solves the problem that in the prior art,cell reselection in the establishment process of RRC connection causes conflict between the connection management of MM and the special process of MM so as to cause call failure.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for processing cell reselection during RRC connection establishment. Background technique [0002] During the RRC (Radio Resource Control, radio resource control protocol) connection establishment process between the user terminal and UTRAN (Universal Terrestrial Radio Access Network, global terrestrial radio access network), the RRC connection establishment process is performed by UE (User Equipment, user Initiated by the upper non-access stratum of the terminal), such as responding to a paging message or initiating a call by the UE. Specifically, the above RRC connection establishment process is as follows: figure 1 As shown, during the RRC connection establishment process, the UE sends an RRC connection request message to the UTRAN on the uplink CCCH (Common Control Channel, common control channel), and the message includes the identifier of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/30H04W48/18H04W76/02H04W88/02
CPCH04W76/046H04W36/08H04W76/27
Inventor 汤月宝
Owner ZTE CORP
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