Group based mobility optimization method and device in machine-type communication
First Claim
1. A method of performing Tracking Area Update (TAU) for a group of Machine-Type Communication (MTC) devices in a communication network, the group comprising a first MTC device and at least one second MTC device that have the same group ID and location information, the communication network comprising an old Mobility Management Entity (MME) and a new Mobility Management Entity (MME) before and after TAU, respectively, for providing mobility management to the group of MTC devices, the method comprising:
- a. after the new MME receives a TAU request about the first MTC device, obtaining a context of the first MTC device from the old MME;
b. the new MME checking the context of the first MTC device to find the group ID of the group, and when the new MME receives other TAU request with the same location information sent by the at least one second MTC device, suspending the handling of the other TAU request; and
c. if the group ID is included in the context of the first MTC device, the new MME utilizing the group ID to obtain from the old MME a context of the at least one second MTC device.
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Abstract
The present invention relates to a method and device of performing Tracking Area Update TAU for a group of Machine-Type Communication MTC devices in a communication network. According to an embodiment of the present invention, the group comprises a first MTC device and at least one second MTC device that have the same group ID and location information, the communication network comprises an old Mobility Management Entity MME and a new Mobility Management Entity MME before and after TAU, respectively, for providing mobility management to the group of MTC devices, and the method comprises: after the new MME receives a TAU request about the first MTC device, obtaining a context of the first MTC device from the old MME; the new MME checking the context of the first MTC device to find the group ID of the group; and if the group ID is included in the context of the first MTC device, the new MME utilizing the group ID to obtain from the old MME a context of the at least one second MTC device.
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Citations
10 Claims
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1. A method of performing Tracking Area Update (TAU) for a group of Machine-Type Communication (MTC) devices in a communication network, the group comprising a first MTC device and at least one second MTC device that have the same group ID and location information, the communication network comprising an old Mobility Management Entity (MME) and a new Mobility Management Entity (MME) before and after TAU, respectively, for providing mobility management to the group of MTC devices, the method comprising:
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a. after the new MME receives a TAU request about the first MTC device, obtaining a context of the first MTC device from the old MME; b. the new MME checking the context of the first MTC device to find the group ID of the group, and when the new MME receives other TAU request with the same location information sent by the at least one second MTC device, suspending the handling of the other TAU request; and c. if the group ID is included in the context of the first MTC device, the new MME utilizing the group ID to obtain from the old MME a context of the at least one second MTC device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A Mobility Management Entity (MME) of performing mobility management for a group of Machine-Type Communication (MTC) devices in a communication network, the group comprising a first MTC device and at least one second MTC device that have the same group ID and location information, the communication network comprising an old MME for providing mobility management to the group of MTC devices before TAU, the MME comprising a processor configured to execute:
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a context of the first MTC device obtaining module configured to, after receiving a TAU request about the first MTC device, obtain a context of the first MTC device from the old MME; a checking module configured to check the context of the first MTC device to find the group ID of the group; a context of the second MTC device obtaining module configured to utilize the group ID to obtain from the old MME a context of the at least one second MTC device; and a suspending module configured to, when receiving other TAU request with the same location information sent by the at least one second MTC device, suspend the handling of the other TAU request. - View Dependent Claims (8, 9)
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10. An MTC Mobility Group Server for a communication network, the server including storage device and query device,
the storage device storing, for a group including a plurality of MTC devices, an association between a group ID of the group and identities of the MTC devices in the group, wherein when an MTC device in the group is attached to the communication network, the identity of the MTC device is added into the group, and when an MTC device in the group is detached from the communication network, the identity of the MTC device is removed from the group; the server also including query device, which is configured to, when the server receives Get Group Member Information Request, provide the identities of the MTC devices included in the group.
Specification