초록 ▼

A cellular communication system hand-off protocol which helps minimize down time associated with a mobile device roaming among different cells in which different cells employ different communication channels (e.g., different frequency hopping sequences). In a preferred embodiment, each base station

A cellular communication system hand-off protocol which helps minimize down time associated with a mobile device roaming among different cells in which different cells employ different communication channels (e.g., different frequency hopping sequences). In a preferred embodiment, each base station is configured to communicate its own particular hopping sequence to all other base stations via the system backbone. Each base station then provides to mobile devices which are registered thereto information regarding the particular hopping sequences employed by other base stations servicing cells into which the mobile device may roam. Such information includes the particular hopping sequences together with an indication of what location in the sequence the base stations are currently at in any given time. In addition, such information may include an indication of the intervals at which a base station is configured to transmit a beacon packet (for passive scanning operation), or at what intervals test pattern packets are transmitted to allow for signal quality evaluation.

대표청구항 ▼

[ What is claimed is:] [1.] In a cellular communication system comprising a backbone, and a first base station and a plurality of associated base stations each coupled to said backbone, each of said plurality of base stations respectively communicating on a selected one of a plurality of communicati

[ What is claimed is:] [1.] In a cellular communication system comprising a backbone, and a first base station and a plurality of associated base stations each coupled to said backbone, each of said plurality of base stations respectively communicating on a selected one of a plurality of communication channels, a method comprising the steps of:each of said plurality of associated base stations conveying information to said first base station related to said respective communication thereof;said first base station receiving said information in a memory and transmitting selected information to an associated mobile device registered with said first base station, wherein the selected information is associated only with a reduced set of the plurality of associated base stations which are predetermined to have a cell area selected from one of adjacent to and overlapping with the cell area of the first base station;said mobile device registering with one of the reduced set of the plurality of associated base stations based on the selected information.