Method and apparatus for non-access stratum message processing during handover in evolved network
DCFirst Claim
1. A method for processing a Non-access Stratum (NAS) message during a handover of a User Equipment (UE) in an evolved network, the method comprising:
- receiving, by a source-eNodeB (S-eNB), a direct-transfer message from a mobility management entity (MME), the direct-transfer message including the NAS message; and
sending, by the S-eNB, a reply to the MME, the reply including a cause value and the NAS message, the cause value indicating the NAS message has not been sent to the UE because of the handover of the UE.
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Abstract
A method and an apparatus for non-access stratum (NAS) message processing during handover in an evolved network are provided. The method includes the following steps. An evolved packet core (EPC) receives a message which indicates that a UE is being handed over sent by a source evolved NodeB (S-eNB), and stops sending an NAS message to the UE temporarily. The EPC receives a message which indicates that the UE returns to an S-eNB service area sent by the S-eNB. The EPC sends the NAS message to the UE through the S-eNB, if needed. With the method and the apparatus, the EPC can acquire a location of the UE in time in the case of a handover failure of the UE, a time limit of a retransmission timer is set precisely, and a specific implementation for forwarding an NAS message through an X2 interface is provided.
10 Citations
13 Claims
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1. A method for processing a Non-access Stratum (NAS) message during a handover of a User Equipment (UE) in an evolved network, the method comprising:
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receiving, by a source-eNodeB (S-eNB), a direct-transfer message from a mobility management entity (MME), the direct-transfer message including the NAS message; and sending, by the S-eNB, a reply to the MME, the reply including a cause value and the NAS message, the cause value indicating the NAS message has not been sent to the UE because of the handover of the UE. - View Dependent Claims (2, 3, 4, 5)
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6. An eNodeB, comprising:
a transceiver is configured to receive a direct-transfer message from a mobility management entity (MME), wherein the direct-transfer message includes an NAS message, and send a reply to the MME, wherein the reply includes a cause value and the NAS message, wherein the cause value indicates the NAS message has not been sent to a user equipment (UE) because of a handover of the UE. - View Dependent Claims (7, 8, 9, 10)
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11. A Mobility Management Entity (MME), comprising:
a transceiver configured to send a direct-transfer message to an source eNodeB (S-eNB), the direct-transfer message including an NAS message; and
receive a reply from the S-eNB, the reply including a cause value and the NAS message, the cause value indicating the NAS message has not been sent to a user equipment (UE) because of a handover of the UE.- View Dependent Claims (12, 13)
Specification