Patent US4365508A successfully refreshed from Google Patents.
Patent US7400886B2 successfully refreshed from Google Patents.
US7400886B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Call hand-over in a wireless local area network
Assignee: Unify GmbH and Co KG
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Filing: 2004-01-09
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Granted: 2008-07-15
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Expires: 2024-01-09
Abstract
Abstract A method and apparatus for automatically handing over calls between a wireless LAN and a non-WLAN, with minimum or no disruption of active calls. The invention gives users flexibility in customizing hand-over preferences and allows telephony features to be transferred during the hand-over.
Inventors
- 👤 Faramarz Sahim
- 👤 Nissim J. Ozery
- 👤 Mallikarjuna Samayamantry
- 👤 Nigel Trueman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:37
CPC Classifications
H; H04; H04L; H04L65/00; H04L65/10; H04L65/102; H04L65/1043; H04L65/1066; H04L65/1069; H04L65/1083; H04L65/1094; H04W; H04W36/00; H04W36/14; H04W36/144; H04W36/1446; H04W84/00; H04W84/02; H04W84/10; H04W84/12
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
153 words
A method for handing over an active call between a first call device and a second call device comprising the steps of: defining a set of target hand-over devices with a mobility server; automatically detecting call hand-over threshold for said first call device, automatically initiating hand-overs responsive to detecting said threshold and monitoring said first call device for on-demand hand-over overrides, wherein at least one of said first call device and said set of target hand-over devices supports wireless local area network (WLAN) communications and said on-demand hand-over overrides include halting automatic hand-overs and forcing hand-overs; selecting said second call device from the previously defined said set of target hand-over devices responsive to automatic detection of said call hand-over threshold, wherein selection of said second call device is manually selectable from said first device; and establishing a connection to said second call device upon acceptance of said call by said second call device.
Claim 2
Independent Claim
153 words
A method for handing over an active call between a first call device and a second call device comprising the steps of: defining a set of target hand-over devices with a mobility server; automatically detecting call hand-over threshold for said first call device, automatically initiating hand-overs responsive to detecting said threshold and monitoring said first call device for on-demand hand-over overrides, wherein at least one of said first call device and said set of target hand-over devices supports wireless local area network (WLAN) communications and said on-demand hand-over overrides include halting automatic hand-overs and forcing hand-overs; selecting said second call device from the previously defined said set of target hand-over devices responsive to automatic detection of said call hand-over threshold, wherein selection of said second call device is manually selectable from said first device; and establishing a connection to said second call device upon acceptance of said call by said second call device.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said first call device is a non-WLAN device.
Claim 4
Dependent Claim
26 words
The method of claim 2 wherein said non-WLAN device is a cellular telephone and said method further comprises maintaining connection to hand-over calls after handing over.
Claim 5
Dependent Claim
17 words
The method of claim 3 , wherein said non-WLAN cellular telephone device uses 3G air interface technology.
Claim 6
Dependent Claim
17 words
The method of claim 3 , wherein said non-WLAN cellular telephone device uses TDMA air interface technology.
Claim 7
Dependent Claim
17 words
The method of claim 3 , wherein said non-WLAN cellular telephone device uses GSM air interface technology.
Claim 8
Dependent Claim
17 words
The method of claim 3 , wherein said non-WLAN cellular telephone device uses COMA air interface technology.
Claim 9
Dependent Claim
15 words
The method of claim 3 , wherein said non-WLAN cellular telephone device uses UMTS technology.
Claim 10
Dependent Claim
14 words
The method of claim 2 wherein said non-WLAN device is an office wireline telephone.
Claim 11
Dependent Claim
61 words
The method of claim 1 wherein said first call device is a WLAN device connected to a first WLAN and before initiating a call hand-over to said second device, said method further comprises: attempting a handoff of said first call device to a second WLAN; and whenever an attempted said handoff is successful, returning to automatically detecting said call hand-over threshold.
Claim 12
Dependent Claim
15 words
The method of claim 10 wherein said WLAN device is a Personal Digital Assistance (PDA).
Claim 13
Dependent Claim
16 words
The method of claim 1 wherein said first call device supports both WLAN and non-WLAN communications.
Claim 14
Dependent Claim
16 words
The method of claim 1 wherein said second call device supports both WLAN and non-WLAN communications.
Claim 15
Dependent Claim
18 words
The method of claim 1 wherein said first call device and said second call device are the same.
Claim 16
Dependent Claim
22 words
The method of claim 1 wherein said first call device and said second call device are integrated as a single call device.
Claim 17
Dependent Claim
29 words
The method of claim 1 , wherein said method further comprises the step of dialing the telephone number of said second call device after selecting said second call device.
Claim 18
Dependent Claim
26 words
The method of claim 1 further comprising the step of disconnecting said call from first call device after establishing said connection to said second call device.
Claim 19
Dependent Claim
19 words
The method of claim 1 , wherein said hand-over threshold is reached when said call loses Internet Protocol connectivity.
Claim 20
Dependent Claim
21 words
The method of claim 1 wherein said hand-over threshold is determined based on Radio Frequency signal strength of the active call.
Claim 21
Dependent Claim
29 words
The method of claim 1 , wherein said hand-over is performed on-demand prior to reaching said hand-over threshold responsive to an on-demand hand-over override from said first call device.
Claim 22
Dependent Claim
19 words
The method of claim 20 , wherein a user access code is used to perform said on-demand hand-over override.
Claim 23
Dependent Claim
29 words
The method of claim 20 , wherein a user access code is used to select telephony features for transfer from said first call device to said second call device.
Claim 24
Dependent Claim
15 words
The method of claim 1 wherein said call remains active after the hand-over is complete.
Claim 25
Dependent Claim
14 words
The method of claim 1 wherein one or more hand-overs are performed per call.
Claim 26
Dependent Claim
21 words
The method of claim 1 , wherein user associated personalized settings and telephony features are handed over with each said hand-over.
Claim 27
Dependent Claim
23 words
The method of claim 1 , wherein said call hand-over threshold is determined based on available resources in network of said target device.
Claim 28
Dependent Claim
29 words
The method of claim 1 wherein said call hand-over threshold is determined based on at least one of call priority or desired call Quality of Service of said call.
Claim 29
Independent Claim
167 words
An apparatus for handing over an active call between a first call device and second call device, said apparatus comprising: a user interface for pre-selecting a set of target hand-over devices, at least one of said first call device and said set of target hand-over devices supporting wireless local area network (WLAN) communications; a detector circuit that detects hand-over threshold for said call; a selector indicator that automatically selects said second call device from said set of target hand-over devices and automatically initiates hand-overs to selected second call devices; an on-demand hand-over override selectively overriding said detector circuit responsive to manual input on said first device, said selector indicator further determining whether to halt an automatic hand-over or to select said second call device and hand-over responsive to said on-demand hand-over override; and a mobility server that provides said set of target hand-over devices for pre-selection to said user interface and establishes a connection to said target device upon acceptance of said call by said target device.
Claim 30
Independent Claim
167 words
An apparatus for handing over an active call between a first call device and second call device, said apparatus comprising: a user interface for pre-selecting a set of target hand-over devices, at least one of said first call device and said set of target hand-over devices supporting wireless local area network (WLAN) communications; a detector circuit that detects hand-over threshold for said call; a selector indicator that automatically selects said second call device from said set of target hand-over devices and automatically initiates hand-overs to selected second call devices; an on-demand hand-over override selectively overriding said detector circuit responsive to manual input on said first device, said selector indicator further determining whether to halt an automatic hand-over or to select said second call device and hand-over responsive to said on-demand hand-over override; and a mobility server that provides said set of target hand-over devices for pre-selection to said user interface and establishes a connection to said target device upon acceptance of said call by said target device.
Claim 31
Dependent Claim
26 words
The apparatus of claim 28 wherein said first call device is a non-WLAN device and said mobility server maintaining connection to hand-over calls after handing over.
Claim 32
Dependent Claim
39 words
The apparatus of claim 28 wherein said first call device is a WLAN device and said selector indicator selects when said WLAN device hands over to a non-WLAN device responsive to wireless local area network information and call priorities.
Claim 33
Dependent Claim
15 words
The apparatus of claim 28 , wherein said user interface sets hand-over targets and preferences.
Claim 34
Dependent Claim
17 words
The apparatus of claim 31 , wherein said user interface is provided via a dial up connection.
Claim 35
Dependent Claim
16 words
The apparatus of claim 31 , wherein said user interface is provided via a personal computer.
Claim 36
Dependent Claim
22 words
The apparatus of claim 28 further comprising a voice prompt generator for notifying other call party when said hand-over is in progress.
Claim 37
Dependent Claim
18 words
The apparatus of claim 28 wherein said first call device and said second call device are the same.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2011-07-15 | 2012-01-14 | 2012-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-07-15 | 2016-01-14 | 2016-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-07-15 | 2020-01-14 | 2020-07-15 | $7700.00 | Window Closed / Lapsed |