System, method, and terminal device
AssigneeSony Corporation
InventorHiromasa Uchiyama
Life of this patent
Estimating the term…
Abstract
[Object] To provide a system, a method, and a terminal device capable of performing mobility management of a terminal in a distributed manner. [Solution] A system including a plurality of management devices configured to manage information of one or more terminal devices positioned in management areas. The plurality of management devices have a layered structure in which the management area of the management device in an upper layer includes the management area of the management device in a lower layer.
Claims18
A system comprising
- a plurality of management devices configured to manage information of one or more terminal devices positioned in management areas, wherein
- the plurality of management devices have a layered structure in which the management area of the management device in an upper layer comprises the management areas of more than one of the management devices in a lower layer,
- the plurality of management devices being configured such that upon determination of a possibility of movement of a managed terminal device of the one or more terminal devices serving as a management target from a first one of the management areas of the lower layer to another of the management layers in the lower layer, management of the managed terminal device is changed from the lower layer to the upper layer,
- wherein the determination of the possibility of movement is made when an elapsed time from transmission of a paging message in the first one of the management areas of the lower layer exceeds a threshold without receiving a response from the terminal device.
A method comprising
- in a case where a management device included in a system comprising a plurality of management devices configured to manage information of one or more terminal devices positioned in management areas and having a layered structure in which the management area of the management device in an upper layer comprises the management areas of more than one of the management devices in a lower layer recognizes a possibility of movement of the terminal device serving as a management target to outside of the management area, notifying another one of the management devices in a same layer or an upper layer of information indicating the possibility of the movement of the terminal device, and
- upon determination of a possibility of movement of a managed terminal device of the one or more terminal devices serving as a management target from a first one of the management areas of the lower layer to another of the management layers in the lower layer, changing management of the managed terminal device from the lower layer to the upper layer,
- wherein the determination of the possibility of movement is made when an elapsed time from transmission of a paging message in the first one of the management areas of the lower layer exceeds a threshold without receiving a response from the terminal device.
A terminal device managed by a system comprising a plurality of management devices configured to manage information of one or more terminal devices positioned in management areas and having a layered structure in which the management area of the management device in an upper layer comprises the management areas of more than one of the management devices in a lower layer,
- the terminal device being configured such that upon determination of a possibility of movement of the terminal device from a first one of the management areas of the lower layer to another of the management layers in the lower layer, management of the terminal device is changed from the lower layer to the upper layer,
- wherein the determination of the possibility of movement is made when an elapsed time from transmission of a paging message in the first one of the management areas of the lower layer exceeds a threshold without receiving a response from the terminal device.
Dependencies are inferred from the claim text.