Method and system for transmitting non-access layer information during switching procedure

Abstract

The invention discloses a transmission method for a non-access layer NAS message during a switching process. The method comprises the following steps: UE sends a NAS message contained in a switching confirmation message at a UE end to eNodeB; if the switching is successful, the targeted eNodeB sends the received NAS message contained in the switching confirmation message to MME / SAE Gateway with the carrier of a switching completion message; the MME / SAE Gateway sends the NAS message at the MME / SAE Gateway end to the targeted eNodeB with the carrier of a switching completion confirmation message; and then the targeted eNodeB sends the NAS message to the UE. The invention also discloses a system of a long-term development network for realizing the method and a base station thereof. The method can reduce the transmission time delay of the NAS message during the switching process, provide services demanded by users in time, and simultaneously save empty interface resources.

Description

technical field [0001] The invention relates to a message transmission method in a mobile communication network, in particular to a NAS (Non-Access Stratum, Non-Access Stratum) message transmission method in a handover process. Background technique [0002] LTE (Long Term Evolution, long-term evolution network) is the next mobile broadband network standard defined in the eighth version by the 3GPP (3rd Generation Partnership Project) standardization organization. figure 1 Shown is a schematic diagram of the structure framework of LTE, LTE mainly includes user equipment (UE, User Equipment), eNB (evolved NodeB, evolved NodeB) and MME / SAE Gateway (Mobile Management Entity / Serving Gateway), where MME / SAE Gateway and The eNBs are connected through the S1 interface, and the eNBs are connected through the X2 interface. A plurality of eNBs constitute an access network of LTE, unlike a UMTS (Universal Mobile Telecommunications System, global mobile communication system) access netw...

AI Technical Summary

Problems solved by technology

[0020] In summary, when the handover is successful in the prior art, although the NAS messages generated by the MME / SAE Gateway and the UE can be processed during the handover, the NAS messages need to be cached at the UE or the MME / SAE Gateway for a period of time, for example: figure 2 Step 8 can only be sent, which increases the delay; and it is necessary to construct a direct message to send the NAS message, such as figure 2 Steps 8, 9, 10, and 11, that is, RRC messages and RANAP messages are also used, which wastes air interface resources

In addition, the existing technology does not process the NAS message generated by the UE during the handover process when the handover fails, so the service required by the user cannot be provided

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