Patent US6985732B1 successfully refreshed from Google Patents.
US6985732B1
Expired / Lapsed
US
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Handover in a mobile communication system using conference facility
Assignee: WSOU Investments LLC
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Filing: 2000-03-30
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Granted: 2006-01-10
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Expires: 2020-03-30
Abstract
Abstract A communications network comprises a central controller which operates to control a zone of the network and which provides a conference call facility with at least one gateway engaged in a call with a mobile station via a first communication channel, means for generating a hand-off required indication indicating that handover of the call is needed, means at the central controller for receiving said hand-off required indication and opening a conference call channel as a second communication channel for the call and means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed.
Inventors
- 👤 Jani Ekman
- 👤 Panu Suontausta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:44
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0055; H04W36/0058; H04W4/00; H04W4/06; Y; Y10; Y10S; Y10S370/00; Y10S370/912; Y10S370/913
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
A communications network comprising: a central controller which operates to control a zone of the network and which provides a conference call facility; at least one gateway engaged in a call with a mobile station via a first communication channel; means for generating a hand-off required indication indicating that handover of the call is needed; means at the central controller for receiving said hand-off required indication and opening a conference call charnel as a second communication channel for the call; and means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed.
Claim 2
Dependent Claim
109 words
A communications network comprising: a central controller which operates to control a zone of the network and which provides a conference call facility; at least one gateway engaged in a call with a mobile station via a first communication channel; means for generating a hand-off required indication indicating that handover of the call is needed; means at the central controller for receiving said hand-off required indication and opening a conference call charnel as a second communication channel for the call; and means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed.
Claim 3
Dependent Claim
30 words
A network according to claim 1 , which comprises a switched packet communication path by means of which the means for handing over, central controller and the gateway are connected.
Claim 4
Dependent Claim
43 words
A network according to claim 1 , wherein the gateway comprises packet generating means for generating a packet addressed to said means for handing over including control information comprising a candidate list of alternative cells to which the call could possible be transferred.
Claim 5
Dependent Claim
40 words
A network according to claim 1 , wherein the gateway is operable to receive RF information from a mobile station, said RF information including call data, and to convert said RF information into a packet for transmission to the gatekeeper.
Claim 6
Dependent Claim
40 words
A network according to claim 1 , wherein the central controller is operable to multiplex the first and second communication channels, such that the call is conveyed simultaneously by both of said channels until the first communication channel is closed.
Claim 7
Dependent Claim
47 words
A network according to claim 3 , wherein the gatekeeper comprises means for selecting a target gateway based on the cells in the candidate list, and for causing said central controller to open the conference call channel to said selected target gateway as a second communication channel.
Claim 8
Dependent Claim
55 words
A network according to claim 1 , which is an internal cellular communications network and which comprises an interface for connection to an external network which includes an external controller such that said call can comprise a first mobile station in the internal cellular communications network and a second mobile station in the external network.
Claim 9
Independent Claim
104 words
A method of effecting handover of a call which at least one mobile station is engaged via a first communication channel in a communications network comprising a central controller which operates a zone of the network and provides a conference call facility, in which method: a hand-off required indication is issued indicating that handover of the call is needed; the central controller receives said hand-off required indication and opens as a second communication channel a conference call channel; handover of said call is effectuated from said first to said second communication channel; and if the handover is successful the first communication channel is closed.
Claim 10
Independent Claim
104 words
A method of effecting handover of a call which at least one mobile station is engaged via a first communication channel in a communications network comprising a central controller which operates a zone of the network and provides a conference call facility, in which method: a hand-off required indication is issued indicating that handover of the call is needed; the central controller receives said hand-off required indication and opens as a second communication channel a conference call channel; handover of said call is effectuated from said first to said second communication channel; and if the handover is successful the first communication channel is closed.
Claim 11
Dependent Claim
31 words
A method according to claim 8 , wherein the hand-off required indication comprises a packet which is conveyed to the central controller via a switched packet communications path of the network.
Claim 12
Dependent Claim
37 words
A method according to claim 8 , wherein the mobile station transmits call data as an RF signal, said call data being converted into a packet for transmission via a switched packet communications path of the network.
Claim 13
Dependent Claim
33 words
A method according to claim 8 , which comprises the step of multiplexing the call via the first and second communication channels at the central controller, prior to closing the first communication channel.
Claim 14
Dependent Claim
142 words
A communications network comprising: a central controller which operates to control a zone of the network and which provides a conference call facility; at least one gateway engaged in a call with a mobile station via a first communication channel; means for generating a hand-off required indication indicating that handover of the call is needed; means at the central controller for receiving said hand-off required indication and opening a conference call channel as a second communication channel for the call; and means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed, wherein the central controller is operable to multiplex the first and second communication channels, such that the call is conveyed simultaneously by both of said channels until the first communication channel is closed.
Claim 15
Dependent Claim
142 words
A communications network comprising: a central controller which operates to control a zone of the network and which provides a conference call facility; at least one gateway engaged in a call with a mobile station via a first communication channel; means for generating a hand-off required indication indicating that handover of the call is needed; means at the central controller for receiving said hand-off required indication and opening a conference call channel as a second communication channel for the call; and means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed, wherein the central controller is operable to multiplex the first and second communication channels, such that the call is conveyed simultaneously by both of said channels until the first communication channel is closed.
References Cited (Backward Citations)
US5845211A
Cited
US6073015A
Cited
WO1998017048A1
Cited
US6516193B1
Cited
WO1998059467A2
Cited
US6510322B1
Cited
US6243581B1
Cited
US6729929B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-01-09 | 2009-07-11 | 2010-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-09 | 2013-07-11 | 2014-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-09 | 2017-07-11 | 2018-01-10 | $7700.00 | Window Closed / Lapsed |