Patent ID: 8644251

Claim:
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.