System and method for controlling an operational mode of a MAC layer in a broadband wireless access communication system
First Claim
1. A method for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station, the method comprising the steps of:
- mode-transiting into an idle mode when the mobile subscriber station is in an inactive state to conserve power and operational resources;
detecting movement of the mobile subscriber station in the idle mode into another paging zone to which a target base station belongs, which is different from a paging zone to which the serving base station belongs; and
mode-transiting into the awake mode and performing location update together with the target base station when the movement of the mobile subscriber station is detected.
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Abstract
A method for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station is provided. The method includes the steps of: mode-transiting into an idle mode when there is no data transmission between the serving base station and the mobile subscriber station during a predetermined first time interval in an awake mode; detecting movement of the mobile subscriber station in the idle mode into another paging zone covering a target base station, which is different from a paging zone covering the serving base station; and mode-transiting into the awake mode and performing location update together with the target base station when the movement of the mobile subscriber station is detected.
91 Citations
36 Claims
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1. A method for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station, the method comprising the steps of:
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mode-transiting into an idle mode when the mobile subscriber station is in an inactive state to conserve power and operational resources;
detecting movement of the mobile subscriber station in the idle mode into another paging zone to which a target base station belongs, which is different from a paging zone to which the serving base station belongs; and
mode-transiting into the awake mode and performing location update together with the target base station when the movement of the mobile subscriber station is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station, the method comprising the steps of:
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mode-transiting into an idle mode when there is no data transmission between the serving base station and the mobile subscriber station during a predetermined first time interval in an awake mode; and
mode-transiting into the awake mode and performing location update of the mobile subscriber station itself at each predetermined interval in the idle mode. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station, the system comprising:
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the mobile subscriber station which mode-transits into an idle mode when there is no data transmission between the serving base station and the mobile subscriber station during a predetermined first time interval in an awake mode, mode-transits into the awake mode and transmits a location update request to a target base station when detecting movement of the mobile subscriber station in the idle mode into another paging zone to which the target base station belongs, which is different from a paging zone to which the serving base station belongs, and performs location update in accordance with a location update response from the target base station, which responds to the location update request;
the target base station which, together with a paging controller for performing the paging zones, performs the location update of the mobile subscriber station and transmits the location update response to the mobile subscriber station when the location update request from the mobile subscriber station is detected; and
the paging controller for updating the location of the mobile subscriber station correspondingly to the location update operation of the target base station and the mobile subscriber station. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A system for controlling operation modes of a medium access control layer in a broadband wireless access communication system, the system comprising:
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a mobile subscriber station which mode-transits into an idle mode when there is no data transmission between a base station and the mobile subscriber station during a predetermined first time interval in an awake mode, mode-transits into the awake mode and transmits a location update request to the base station at each predetermined interval in the idle mode, and performs location update in accordance with a location update response from the base station, which responds to the location update request;
the base station which, together with a paging controller for performing the paging zones, performs the location update of the mobile subscriber station and transmits the location update response to the mobile subscriber station when the location update request from the mobile subscriber station is detected; and
the paging controller for updating the location of the mobile subscriber station correspondingly to the location update operation of the base station and the mobile subscriber station. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for determining paging time points for a plurality of mobile subscriber stations by a paging controller when mobile some subscriber stations mode-transits from an awake mode having transmission of traffic into an idle mode having no transmission of traffic from among the plurality of mobile subscriber stations in a broadband wireless access communication system including a base station, the plurality of mobile subscriber stations in a cell controlled by the base station, and the paging controller connected to the base station, the method comprising the steps of:
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determining a paging cycle;
determining an offset value in order to differently set time points at which mobile subscriber stations awake; and
determining based on the paging cycle and the offset value the time points at which mobile subscriber stations awake.
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36. A broadband wireless access communication system comprising:
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a base station;
a plurality of mobile subscriber stations in a cell controlled by the base station; and
a paging controller for determining paging time points for a plurality of mobile subscriber stations when mobile some subscriber stations mode-transits from an awake mode having transmission of traffic into an idle mode having no transmission of traffic from among the plurality of mobile subscriber stations, determining an offset value in order to differently set time points at which mobile subscriber stations awake, and determining based on a paging cycle and the offset value the time points at which mobile subscriber stations awake.
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Specification