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Method and device for making request of obtaining system information

A system information and message technology, applied in the field of communication, can solve problems such as inconsistent system information, wrong system information, and affecting the reliability of system information

Active Publication Date: 2014-11-12
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the GERAN system has changed, for example, the cell has been deleted, the GERAN system information saved by the eNB is no longer valid; when the UE needs to switch to the GERAN system, the UE will report the measurement results to the eNB. Since the eNB has the GERAN system information, it will The decision to initiate the NACC process to the GERAN neighboring cell, but the GERAN system information saved by the eNB is inconsistent with the system information of the neighboring GERAN cell, will cause the UE to use the wrong system information to access during the NACC process, and unpredictable errors or NACC failures may occur , needs to be accessed again through the CCO, which further increases the interruption delay
[0008] To sum up, since the eNB and MME in the prior art do not return confirmation messages after transmitting the ENB DIRECT INFORMATION TRANSFER message and the MME DIRECT INFORMATION TRANSFER message, it is impossible to determine whether the peer end has received the message correctly. If the message is not received correctly, the eNB will Unable to obtain the latest GERAN system information, which affects the reliability of system information, which in turn affects UE cross-system handover

Method used

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  • Method and device for making request of obtaining system information
  • Method and device for making request of obtaining system information
  • Method and device for making request of obtaining system information

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Embodiment Construction

[0024] The embodiment of the present invention first solves the problem that the eNB has not received the ENB DIRECT INFORMATION TRANSFER message for a long time after sending the evolved base station information direct transfer (ENB DIRECT INFORMATION TRANSFER) message to the MME, because the MME will not return an ACK (correct response) to the eNB or a confirmation message such as NACK (error response), so in order to obtain reliable system information, the eNB starts timing when it sends the ENB DIRECT INFORMATION TRANSFER message to the MME. If the MME DIRECT INFORMATION TRANSFER message of the system information is sent, the eNB sends the ENB DIRECT INFORMATION TRANSFER message to the MME again. The ENB DIRECT INFORMATION TRANSFER message is sent multiple times by the eNB to request system information, which helps the MME to receive it correctly, and enables the MME to send the latest GERAN system information to the eNB, thereby improving the reliability of the system info...

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Abstract

The invention discloses a method for making a request of obtaining system. The method is used for improving the reliability of the system information. The method comprises that: an evolved Node B (eNB) transmits an ENB DIRECT INFORMATION TRANSFER message to a mobility management entity (MME); the eNB starts timing when transmitting the ENB DIRECT INFORMATION TRANSFER message; and if an MME DIRECT INFORMATION TRANSFER message carrying the system information is not received from the MME when the timing is performed for a first preset time length, the eNB transmits the ENB DIRECT INFORMATION TRANSFER message to the MME again. The invention also discloses a device for implementing the method.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and a device for requesting to obtain system information. Background technique [0002] RAN (Radio Access Network) information management is a part of handover between different systems, mainly to obtain related The system information of the adjacent cell is notified to the UE through handover commands, NACC (Network Assisted Cell Change, Network Assisted Cell Change) and redirection processes, so as to prevent the UE from reading system information when accessing the GERAN / UTRAN system and shorten the time between UE systems. Switchover time and service interruption time. [0003] The current protocol standard only implements RAN information management between E-UTRAN (Evolved Universal Terrestrial Radio Access Network) and GERAN, and the base station (such as eNB (evolved base station)) in E-UTRAN is used as the control BSS (Base Station Subsystem, Base station subsystem), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W8/02H04L1/16
Inventor 孙长玮王一王涓涓
Owner DATANG MOBILE COMM EQUIP CO LTD