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: 2009-11-18
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 describes in detail the process of cell reselection triggered by measurement during the RRC connection establishment process. Specifically, if during the RRC connection establishment process, the physical layer reports the measurement result indicating that a better cell is found, which causes the RRC to reselect the cell triggered by the measurement result, then the AS (Access Stratum, access layer) layer is reselecting Notify NAS (Non-Access Stratum, non-access layer) that cell reselection occurs during RRC connection establishment. The NAS layer buffers the connection establishment request message. After the AS layer reports the cell information to the NAS layer, the NAS layer reports according to Determine whether RA / LA has changed. If there is no change, the buffered connection establishment request message is re-issued to the AS layer, and the AS re-initiates the RRC connection establishment. If the RA / LA changes, the NAS layer j...

specific Embodiment 2

[0076] Specific embodiment two, this embodiment describes in detail the process of UE reselecting the cell according to the designated frequency in the RRC connection establishment message sent by UTRAN.

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

specific Embodiment 3

[0096] Specific embodiment 3, this embodiment describes in detail the implementation process of the RRC connection rejection message generated by UTRAN to the UE, and the UE performs the specified frequency cell reselection or the specified standard reselection process according to the RRC connection rejection message.

[0097] Specifically, if the UE sends an RRC connection request message to UTRAN during the RRC connection establishment, due to network congestion, 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 determine whether the counter V300 exceeds the threshold N300. If V300>N300, terminate the RRC connection establishment, otherwise notify the NAS layer RRC of cell reselection. If the UE reselects to the designated carrier frequency and successfully camps on, the RRC reports the cell information to the NAS layer a...

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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 reselection occurs 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, and in particular to a method and device for processing cell reselection in the process of establishing an RRC connection. Background technique [0002] In the RRC (Radio Resource Control, Radio Resource Control Protocol) connection establishment process between the user terminal and UTRAN (Universal Terrestrial Radio Access Network), the RRC connection establishment process is performed by the UE (User Equipment, user equipment). The upper non-access layer of the terminal) initiates, such as responding to a paging message or the UE initiates a call. Specifically, the above-mentioned RRC connection establishment process is as follows: figure 1 As shown, during the establishment of the RRC connection, the UE sends an RRC connection request message to UTRAN on the uplink CCCH (Common Control Channel). The message contains the UE's identity (TMSI (Temporary Mobile Subscriber Identity, Tem...

Claims

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Application Information

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