Patent EP0731620A2 successfully refreshed from Google Patents.
EP0731620A2
Expired / Lapsed
EP
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Handover in a mobile telecommunications network with ATM switch
Assignee: Roke Manor Research Ltd
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Filing: 1996-01-08
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Granted: —
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Expires: 2016-01-08
Abstract
Abstract The invention relates to mobile telecommunication networks. In such networks mobile handover can lead to the connections in the fixed network infrastructure being non optimal, resulting in the wasteful use of network resources. However optimisation of the network can cause breaks in transmission with the consequent corruption of user data. The mobile telecommunication network makes use of asynchronous transfer mode transmission and switching and incorporates broadband switching nodes. The facilities incorporated into such broadband switching nodes are used to enable network optimisation without the corruption of user data. To achieve various network configurations between the broadband switching node and mobile network interface units, marker cells are inserted into the data stream. Marker cells detectors are provided and the switching configurations are carried out in accordance with the detected marker cells.
Inventors
- 👤 Michael John Mctiffin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:02
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0478; H04W; H04W36/00; H04W36/02; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L2012/5603; H04L2012/5604; H04L2012/5607; H04L2012/5614; H04L2012/5615; H04L2012/5619; H04L2012/5629; H04L2012/563; H04L2012/5678; H04L2012/568
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
A mobile telecommunications network comprising at least one mobile terminal arranged to communicate via a radio medium to at least a first and a second base station, said first base station being connected to a first mobile network interface unit which is connected to a switching node by way of a first channel, said second base station being connected to a second mobile network interface unit which is connected to the switching node by way of a second channel, said switching node being connected to the mobile telecommunications network by way of a third channel, said first and second network interface units being connected together by a fourth channel over which information is passed between said first and second mobile network interface units, characterised in that said switching node comprises an asynchronous transfer mode switching means, including marker cell insertion means and marker cell detection means, and each mobile network interface unit includes marker cell insertion means and marker cell detection means and selection means, and said marker cell detection and insertion means are used to control the operation of the asynchronous transfer mode switching means and selector means to enable different connections to be configured between said channels.
Claim 2
Dependent Claim
242 words
A mobile telecommunications network as claimed in claim 1, wherein, in operation, one of said mobile network interface units is arranged to request details of a connection path from the other mobile network interface unit and from the switching node, said one mobile network interface unit is arranged to request the switching node to set up a monitor path from said third channel to said second channel, said one mobile network interface unit is arranged to insert a marker cell into said fourth channel and causes said switching node to insert a marker cell in to the first and second channels, and on receipt of this marker cell, said one mobile network interface unit is arranged to request the switching node to make the connection between the second and third channels bi-directional, and when said one mobile network interface unit is aware that said connection is configured it starts transmitting data on the second channel followed by data received from said base station, and upon receipt of both said marker cells said one mobile network interface unit is caused to transmit cells received on said second channel to said base station, whereupon said switching node is caused to transfer control from said first channel to said second channel and requests the path between said first and said third channels to be cleared, and said other mobile network interface unit is instructed to clear the connection between said fourth and said first channels.
Claim 3
Dependent Claim
26 words
A mobile telecommunications network as claimed in claim 1 or claim 2, wherein each mobile network interface unit is connected to a different broadband switching node.
Claim 4
Dependent Claim
30 words
A mobile telecommunications network as claimed in any preceding claim, wherein each mobile network interface unit includes a cell router which directs cells via the second or the fourth channel.
Claim 5
Dependent Claim
37 words
A mobile telecommunications network as claimed in claim 4, wherein each mobile network interface unit includes buffer means connected to the input of said cell router, at which point marker cells are inserted into the data stream.
References Cited (Backward Citations)
GB2294081A
Cited
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