Telecommunications systems
First Claim
1. A telecommunications system comprising:
- a plurality of base stations;
a communications channel interconnecting said base stations;
a plurality of communication devices, each communication device being able to communicate with said base stations via an additional channel separate from said communications channel, and each communication device having a specific association of identity with a respective base station irrespective of physical location of the communication device;
each said base station being arranged to establish communication with a selected communication device such that either;
i) communications between a base station and said selected communication device traverse said additional channel directly between that base station and that device;
orii) communications between a first base station and said selected communication device traverse said communications channel, said additional channel and at most one other base station, said first base station being the base station specifically associated with the selected communication device; and
wherein communications with said selected communication device and involving a channel different from said communications channel always traverse the respective base station with which that selected communication device has a specific association of identity, via a link which is individual to that base station.
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Accused Products
Abstract
In a mobile communications system each radio unit (14,16) is associated with a respective base station (12) as its `home` base station; any radio unit can communicate with any base station in whose service area it is located. Each base station has a radio interface (20) for communication with radio units, a telephone interface (24) for connection to a telephone line, for example via a PABX (44), and a LAN interface (28) for connection to a local area network (40) to which all the base stations are coupled. Voice communications for a handset are always routed through the home base station for that handset, e.g. to another handset or to the PABX, irrespective of the identity of the base station in whose service area the handset is currently located.
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Citations
19 Claims
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1. A telecommunications system comprising:
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a plurality of base stations; a communications channel interconnecting said base stations; a plurality of communication devices, each communication device being able to communicate with said base stations via an additional channel separate from said communications channel, and each communication device having a specific association of identity with a respective base station irrespective of physical location of the communication device; each said base station being arranged to establish communication with a selected communication device such that either; i) communications between a base station and said selected communication device traverse said additional channel directly between that base station and that device;
orii) communications between a first base station and said selected communication device traverse said communications channel, said additional channel and at most one other base station, said first base station being the base station specifically associated with the selected communication device; and wherein communications with said selected communication device and involving a channel different from said communications channel always traverse the respective base station with which that selected communication device has a specific association of identity, via a link which is individual to that base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A telecommunications system comprising:
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a plurality of base stations; a communications channel interconnecting said base stations; a plurality of communication devices, each communication device being able to communicate with said base stations via an additional channel separate from said communications channel, and each communication device having a specific association of identity with a respective base station irrespective of physical location of the communication device; and an individual link for each base station to a communications facility external to said system; said base stations being operative to route all communications between any of said communication devices and said external communications facility via the base station specifically associated with that communication device. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A communications system comprising:
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a first communications network; a second communications network; a plurality of nodes, each node being connected to both said first and said second communications networks and communicating with other nodes solely through said first communications network; and a plurality of devices, each device being associated with a respective one of said nodes; each said node including means for selectively coupling to said second communications network those communications which originate only from a device associated with that node and which are intended for said second communications network, and for selectively coupling to said first communications network any communications from any device including devices not associated with that node. - View Dependent Claims (16, 17, 18, 19)
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Specification