US5873035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conducting handoff of a data transmission
Assignee: Google Technology Holdings LLC
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Filing: 1996-01-30
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Granted: 1999-02-16
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Expires: 2016-01-30
Abstract
Abstract During a wireless communication of data in which modems (21, 24) are in use, a method of handing off the communication link (32) is described. The communication link (32) is handed off from a source base site (22) to a target base site (23). An interworking function (33) is then transfered from a source interworking unit (25) to a target interworking unit (26) by transfering protocol status (42) such as transmission control protocol. A cut over (34) from the source modem (21) to a target modem (24) is conducted once the interworking function (33) is transfered.
Inventors
- 👤 Gregory C. Ladden
- 👤 Joe Rosswog
- 👤 Jay Jayapaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:09
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/12; H04W88/00; H04W88/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A method of conducting handoff of a data transmission in a communication system comprising the steps of: handing-off a communication link of a mobile unit from a source base site to a target base site; transferring an interworking function from a source interworking unit located at the source base site to a target interworking unit located at the target base site; and cutting-over from a source modem to a target modem.
Claim 2
Independent Claim
71 words
A method of conducting handoff of a data transmission in a communication system comprising the steps of: handing-off a communication link of a mobile unit from a source base site to a target base site; transferring an interworking function from a source interworking unit located at the source base site to a target interworking unit located at the target base site; and cutting-over from a source modem to a target modem.
Claim 3
Dependent Claim
48 words
The method of claim 1 wherein said step of transferring said interworking function comprises the steps of: assigning said target modem; transferring a protocol status from said source interworking unit to said target interworking unit; and transferring a modem parameter from said source modem to said target modem.
Claim 4
Dependent Claim
31 words
The method of claim 2 wherein said step of transferring said interworking function further comprises the step of transferring buffered data from said source interworking unit to said target interworking unit.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein said step of assigning said target modem comprises the step of initializing said target modem.
Claim 6
Independent Claim
49 words
A method of conducting handoff of a data transmission in a communication system comprising the steps of: handing-off a communication link of a mobile unit from a digital base site to an analog base site; and transferring a modem function from a source interworking unit to said mobile unit.
Claim 7
Independent Claim
49 words
A method of conducting handoff of a data transmission in a communication system comprising the steps of: handing-off a communication link of a mobile unit from a digital base site to an analog base site; and transferring a modem function from a source interworking unit to said mobile unit.
Claim 8
Dependent Claim
50 words
The method of claim 5 wherein said step of transferring said modem function comprises the steps of: initializing a mobile unit modem; transferring a protocol status from said source interworking unit to said mobile unit modem; and transferring a modem parameter from said interworking unit to said mobile unit modem.
Claim 9
Dependent Claim
37 words
The method of claim 6 wherein said protocol status is transferred to said mobile unit modem over one of a control channel link and a traffic channel link between said mobile unit and said digital base site.
Claim 10
Independent Claim
64 words
A method of conducting handoff of a data transmission in a communication system comprising the steps of: handing-off a communication link of a mobile unit from a digital base site to a analog base site; transferring an interworking function from a source interworking unit to a target interworking unit; training a wireless modem pair; and cutting-over from a source modem to a target modem.
Claim 11
Independent Claim
64 words
A method of conducting handoff of a data transmission in a communication system comprising the steps of: handing-off a communication link of a mobile unit from a digital base site to a analog base site; transferring an interworking function from a source interworking unit to a target interworking unit; training a wireless modem pair; and cutting-over from a source modem to a target modem.
Claim 12
Dependent Claim
49 words
The method of claim 8 wherein said step of transferring an interworking function comprises the steps of: assigning said target modem; transferring a wireline protocol status from said source interworking unit to said target interworking unit; and transferring a modem protocol from said source modem to said target modem.
Claim 13
Dependent Claim
67 words
The method of claim 8 wherein said step of training said wireless modem pair comprises the steps of: training an analog base site wireless modem; training a mobile unit wireless modem; negotiating a wireless protocol between said analog base site wireless modem and said mobile unit wireless modem; and establishing said wireless protocol negotiated between said analog base site wireless modem and said mobile unit wireless modem.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-02-15 | 2002-08-17 | 2003-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-15 | 2006-08-17 | 2007-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-15 | 2010-08-17 | 2011-02-16 | $7700.00 | Window Closed / Lapsed |