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 a mobile subscriber station in a communication system, the method comprising the steps of:
- mode-transitioning into an idle mode when the mobile subscriber station is in an inactive state;
detecting movement of the mobile subscriber station in the idle mode into another paging zone to which a target base station belongs, which paging zone is different from a paging zone to which a serving base station of the mobile subscriber station belongs;
mode-transitioning into an awake mode and performing location update with the target base station based on the detected movement of the mobile subscriber station, wherein the location update is carried out by transmitting a location update request to the target base station and receiving a location update response from the target base station; and
mode-transitioning from the idle mode into the awake mode when the mobile subscriber station detects a paging targeting the mobile subscriber station itself, by receiving paging information broadcasted from the serving base station in accordance with a paging cycle, and recognizing existence of the paging when the paging information contains a mobile subscriber station identifier of the mobile subscriber station.
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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.
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Citations
21 Claims
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1. A method for controlling a mobile subscriber station in a communication system, the method comprising the steps of:
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mode-transitioning into an idle mode when the mobile subscriber station is in an inactive state; detecting movement of the mobile subscriber station in the idle mode into another paging zone to which a target base station belongs, which paging zone is different from a paging zone to which a serving base station of the mobile subscriber station belongs; mode-transitioning into an awake mode and performing location update with the target base station based on the detected movement of the mobile subscriber station, wherein the location update is carried out by transmitting a location update request to the target base station and receiving a location update response from the target base station; and mode-transitioning from the idle mode into the awake mode when the mobile subscriber station detects a paging targeting the mobile subscriber station itself, by receiving paging information broadcasted from the serving base station in accordance with a paging cycle, and recognizing existence of the paging when the paging information contains a mobile subscriber station identifier of the mobile subscriber station. - View Dependent Claims (2, 3, 4)
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5. A method for controlling a mobile subscriber station in a communication system, the method comprising the steps of:
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mode-transitioning into an idle mode when there is no data transmission between a 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 to which a target base station belongs, which paging zone is different from a paging zone to which a serving base station of the mobile subscriber station belongs; and mode-transitioning into the awake mode and performing location update cyclically at a predetermined idle interval in the idle mode, by awaking the mobile subscriber station at timings determined based on the predetermined idle interval and an offset value, the offset value being determined to differently set time points at which mobile subscriber stations of the serving base station mode-transition from the idle mode into the awake mode, wherein the location update is carried out by transmitting a location update request to the target base station and receiving a location update response from the target base station. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A system for controlling a mobile subscriber station in a communication system, the system comprising:
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the mobile subscriber station adapted to mode-transition into an idle mode when the mobile subscriber station is in an inactive state, to detect movement of the mobile subscriber station in the idle mode into another paging zone to which a target base station belongs, which paging zone is different from a paging zone to which a serving base station of the mobile subscriber station belongs, to mode-transition from the idle mode into the awake mode when the mobile subscriber station detects a paging targeting the mobile subscriber station itself, and to, based on the detected movement of the mobile subscriber station, mode-transition into the awake mode and perform location update with the target base station; and the target base station performs the location update with the mobile subscriber station, wherein the mobile subscriber station performs the location update by transmitting a location update request to the target base station and receiving a location update response from the target base station, and further wherein the mobile subscriber station is adapted to receive paging information broadcasted from the serving base station in accordance with a set paging cycle and recognizes existence of the paging when the paging information contains a mobile subscriber station identifier of the mobile subscriber station. - View Dependent Claims (12, 13, 14, 15)
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16. A system for controlling a mobile subscriber station in a communication system, the system comprising:
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a mobile subscriber station adapted to mode-transition 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, to detect movement of the mobile subscriber station in the idle mode into another paging zone to which a target base station belongs, which paging zone is different from a paging zone to which a serving base station of the mobile subscriber station belongs, and to mode-transition into the awake mode and perform location update cyclically at a predetermined idle interval in the idle mode; and the base station performs the location update with the mobile subscriber station, wherein the mobile subscriber station performs the location update by transmitting a location update request to the base station and receiving a location update response from the base station, and at timing points determined based on the predetermined idle interval and an offset value, the offset value being determined to differently set time points at which mobile subscriber stations of the base station mode-transition from the idle mode into the awake mode. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification