System and method for performing a handover in an enhanced multicast broadcast system (E-MBS)
First Claim
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1. A wireless communication network comprising a plurality of enhanced multicast broadcast system (E-MBS) zones, each E-MBS zone comprising a plurality of base stations, wherein at least one of the base stations in a specified E-MBS zone is configured to:
- broadcast a zone-edge indicator that indicates the proximity of the base station to an edge of the specified E-MBS zone to each of a plurality of mobile stations registered with the specified E-MBS zone,wherein if the base station is in both the specified E-MBS zone and a second E-MBS zone, the base station is further configured to broadcast a second zone-edge indicator that indicates the proximity of the base station to an edge of the second E-MBS zone,wherein the zone-edge indicator comprises one of a positive value indicating that the base station is at an edge of the specified E-MBS zone, a negative value indicating that the base station is not at an edge of the specified E-MBS zone, and a soft value indicating that the base station is close to an edge of the specified E-MBS zone.
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Abstract
A wireless communication network comprising a plurality of base stations capable of wireless communication with a plurality of subscriber stations within a coverage area of the network, wherein at least one of the plurality of base stations is capable of transmitting an edge-zone indicator which indicates the proximity of the at least one base station to an edge of an enhanced multicast broadcast system (E-MBS) zone.
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Citations
21 Claims
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1. A wireless communication network comprising a plurality of enhanced multicast broadcast system (E-MBS) zones, each E-MBS zone comprising a plurality of base stations, wherein at least one of the base stations in a specified E-MBS zone is configured to:
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broadcast a zone-edge indicator that indicates the proximity of the base station to an edge of the specified E-MBS zone to each of a plurality of mobile stations registered with the specified E-MBS zone, wherein if the base station is in both the specified E-MBS zone and a second E-MBS zone, the base station is further configured to broadcast a second zone-edge indicator that indicates the proximity of the base station to an edge of the second E-MBS zone, wherein the zone-edge indicator comprises one of a positive value indicating that the base station is at an edge of the specified E-MBS zone, a negative value indicating that the base station is not at an edge of the specified E-MBS zone, and a soft value indicating that the base station is close to an edge of the specified E-MBS zone. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A base station in a specified one of a plurality of enhanced multicast broadcast system (E-MBS) zones, each E-MBS zone comprising a plurality of base stations, wherein the base station is configured to:
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broadcast a zone-edge indicator that indicates the proximity of the base station to an edge of the specified E-MBS zone to each of a plurality of mobile stations registered with the specified E-MBS zone, wherein if the base station is in both the specified E-MBS zone and a second E-MBS zone, the base station is further configured to broadcast a second zone-edge indicator that indicates the proximity of the base station to an edge of the second E-MBS zone, wherein the zone-edge indicator comprises one of a positive value indicating that the base station is at an edge of the specified E-MBS zone, a negative value indicating that the base station is not at an edge of the specified E-MBS zone, and a soft value indicating that the base station is close to an edge of the specified E-MBS zone. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of operating a base station in a specified one of a plurality of enhanced multicast broadcast system (E-MBS) zones, each E-MBS zone comprising a plurality of base stations, the method comprising:
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broadcasting a zone-edge indicator that indicates the proximity of the base station to an edge of the specified E-MBS zone to each of a plurality of mobile stations registered with the specified E-MBS zone; and if the base station is in both the specified E-MBS zone and a second E-MBS zone, broadcasting a second zone-edge indicator that indicates the proximity of the base station to an edge of the second E-MBS zone, wherein the zone-edge indicator comprises one of a positive value indicating that the base station is at an edge of the specified E-MBS zone, a negative value indicating that the base station is not at an edge of the specified E-MBS zone, and a soft value indicating that the base station is close to an edge of the specified E-MBS zone. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A mobile station capable of being registered with a current enhanced multicast broadcast system (E-MBS) zone, each E-MBS zone comprising a plurality of base stations, wherein the mobile station is configured to:
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receive a broadcast from a base station in the current E-MBS zone, wherein the broadcast comprises a zone-edge indicator; and determine the proximity of the mobile station to an edge of the current E-MBS zone based upon a value of the zone-edge indicator, wherein if the broadcast comprises a plurality of zone-edge indicators, the mobile station is configured to monitor a specified one of the zone-edge indicators that corresponds to the current E-MBS zone and to determine the proximity of the mobile station to an edge of the current E-MBS zone based on the monitored zone-edge indicator, wherein the mobile station is further configured to determine that the mobile station is not at an edge of the current E-MBS zone when the zone-edge indicator comprises a negative value and to determine that the mobile station is at an edge of the current E-MBS when the zone-edge indicator comprises a positive value, wherein the mobile station is further configured to determine that the mobile station is close to an edge of the current E-MBS zone when the zone-edge indicator comprises a soft value. - View Dependent Claims (20, 21)
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Specification