COMMUNICATION APPARATUS, CORE NETWORK NODE, SYSTEM, COMPUTER PROGRAM AND METHODS FOR REROUTING NAS-MESSAGES
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Accused Products
Abstract
A system is described in which a default MME (9A) receives a NAS message (S501, S505) from a mobile device (3D); sends a rerouting request (S509) to a base station (5) serving the mobile device (3D) and includes information identifying a group of dedicated MMEs (9D) to which the NAS message should be rerouted. If none of the dedicated MMEs (9D) is available, then the default MME (9A) receives a message from the base station (5), the message rerouting the NAS message to the default MME (9A), instead of a dedicated MME (9D). The default MME (9A) either proceeds (S515a) to serving the mobile device (3D) or the default MME (9A) rejects (S515b) the NAS message.
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Citations
38 Claims
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1-20. -20. (canceled)
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21. A communication method of a communication apparatus in a wireless communication system, the communication method comprising:
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receiving, from a communication device, a first message for establishing a communication connection with the communication device; sending the first message to a first core network node; receiving, from the first core network node, a second message including information identifying a group of at least one core network node; and selecting a second core network node not included in the group when no valid core network node is available within the group. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A communication method of a core network node in a wireless communication system, the communication method comprising:
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receiving, when no valid core network node is available within a group of at least one core network node, a third message from a communication apparatus of the wireless communication system, the third message including a first message for establishing a communication connection for a communication device, and wherein the core network node of the wireless communication system is not included in the group. - View Dependent Claims (30, 31, 32, 33)
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34. A communication method for a communication device configured to communicate with a communication apparatus, comprising;
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sending, to the communication apparatus, a first message for establishing a communication connection to cause the communication apparatus to send the first message to a first core network node, wherein a request message including the first message is sent to a second core network node in a case where when no valid core network node is available within a group of at least one core network node, the group being identified by information sent from the first core network node and not including the second core network node.
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35. A communication apparatus in a wireless communication system, the communication apparatus comprising:
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a transceiver configured to; communicate with at least one communication device, and receive, from a communication device, a first message for establishing a communication connection; a transmitter configured to send the first message to a first core network node; a receiver configured to receive from the first core network node, a second message including information identifying a group of at least one core network node; and at least one processor configured to process to select a second core network node not included in the group when no valid core network node is available within the group.
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36. A core network node in a wireless communication system, comprising:
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at least one processor configured to process to receive, when no valid core network node is available within a group of at least one core network node, a third message for establishing a communication connection for a communication device, from a communication apparatus of the wireless communication system, the third message including information indicating a request message including the third message is rerouted, and wherein the core network node for the wireless communication system is not included in the group.
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37. A system comprising:
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a communication apparatus in a wireless communication system, the communication apparatus comprising; a transceiver configured to; communicate with at least one communication device, and receive, from a communication device, a first message for establishing a communication connection; a transmitter configured to send the first message to a first core network node; a receiver configured to receive from the first core network node, a second message including information identifying a group of at least one core network node; and at least one processor configured to process to select a second core network node not included in the group when no valid core network node is available within the group; and a core network node in a wireless communication system, comprising; at least one processor configured to process to receive, when no valid core network node is available within a group of at least one core network node, a third message for establishing a communication connection for a communication device, from a communication apparatus of the wireless communication system, the third message including information indicating a request message including the third message is rerouted, and wherein the core network node for the wireless communication system is not included in the group.
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38. A communication device, comprising:
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at least one processor configured to process to; communicate with a communication apparatus, and send, to the communication apparatus, a first message for establishing a communication connection to cause the communication apparatus to send the first message to a first core network node, wherein a request message including the first message is sent to a second core network node when no valid core network node is available within a group of at least one core network node, and the group is identified by information sent from the first core network node and does not include the second core network node.
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Specification