Inter-exchange soft handoff in a cellular telecommunications system
First Claim
1. In a cellular telecommunications system in which a user mobile station relays user information radio signals via at least one of a plurality of base stations and in which said base stations further relay said user information signals via at least one of a plurality of mobile exchanges to and from another system user, the a method for inter-exchange soft handoff with diversity combining, comprising the steps of:
- maintaining the relay of user information signals between a mobile station and a first mobile exchange via a first base station connected by a first connection to said first mobile exchange, said first mobile exchange further relaying the user information signals to and from another system user, said first mobile exchange controlling the user communications,establishing a further second connection for further second relay of said user information signals between said mobile station and said first mobile exchange via a further second base station connected to a further second mobile exchange, said second mobile exchange further relaying said user communications signals to said first mobile exchange,performing diversity combining at said first mobile exchange of said user information signals as relayed from said mobile station to said first mobile exchange via said first connection and said further second connection, said first mobile exchange offering the combined user information signal to said other system user,performing further diversity combining at said mobile station of said user information signals as relayed from said other system user to said first mobile exchange and relayed further via said first connection and said further second connection to said mobile station.
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Accused Products
Abstract
In a cellular telecommunications system having mobile exchanges, base stations and mobile stations, the mobile exchanges are capable of both intra-exchange and inter-exchange soft handoffs. Thereby, a seamless soft handoff with signal diversity combining is obtained throughout the service area of the system, which preferably is a CDMA system.
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Citations
10 Claims
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1. In a cellular telecommunications system in which a user mobile station relays user information radio signals via at least one of a plurality of base stations and in which said base stations further relay said user information signals via at least one of a plurality of mobile exchanges to and from another system user, the a method for inter-exchange soft handoff with diversity combining, comprising the steps of:
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maintaining the relay of user information signals between a mobile station and a first mobile exchange via a first base station connected by a first connection to said first mobile exchange, said first mobile exchange further relaying the user information signals to and from another system user, said first mobile exchange controlling the user communications, establishing a further second connection for further second relay of said user information signals between said mobile station and said first mobile exchange via a further second base station connected to a further second mobile exchange, said second mobile exchange further relaying said user communications signals to said first mobile exchange, performing diversity combining at said first mobile exchange of said user information signals as relayed from said mobile station to said first mobile exchange via said first connection and said further second connection, said first mobile exchange offering the combined user information signal to said other system user, performing further diversity combining at said mobile station of said user information signals as relayed from said other system user to said first mobile exchange and relayed further via said first connection and said further second connection to said mobile station. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a cellular telecommunications system comprising a plurality of mobile exchanges, a plurality of base stations and a plurality of mobile stations roaming throughout the system area, in which a user mobile station relays user information radio signals via at least one of a plurality of base stations and in which said base stations further relay said user information signals via at least one of a plurality of mobile exchanges to and from another system user, a system of inter-exchange soft handoff with diversity combining, said system comprising:
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means at each mobile station of said plurality of mobile stations and at each base station of said plurality of base stations and at each mobile exchange of said plurality of mobile exchanges, to maintain the relay of user information signals between a mobile station and a first mobile exchange via a first base station connected by a first connection to said first mobile exchange, further means at said first mobile exchange for further relaying the user information signals to and from another system user, further means at said first mobile exchange for controlling the user communications, means at each mobile station of said plurality of mobile stations and at each base station of said plurality of base stations and at each mobile exchange of said plurality of mobile exchanges for establishing a further second connection for further second relay of said user information signals between said mobile station and said first mobile exchange via a further second base station connected to a further second mobile exchange, said second mobile exchange comprising further means for further relaying said user communications signals to said first mobile exchange, means at said first mobile exchange for performing combining of said user information signals as relayed from said mobile station to said first mobile exchange via said first connection and said further second connection, said first mobile exchange comprising further means for offering the combined user information signal to said other system user, means at said mobile station for Performing further diversity combining of said user information signals as relayed from said other system user to said first mobile exchange and relayed further via said first connection and said further second connection to said mobile station. - View Dependent Claims (9, 10)
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Specification