§
Luxuse
Patent Intelligence
Sign In
Patent EP0818938A2 successfully refreshed from Google Patents.
← Back to Patent Explorer
EP0818938A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Mobile-assisted hand-off across multiple wireless data networks

Assignee: AT&T Inc
•
Filing: 1997-06-30
•
Granted: —
•
Expires: 2017-06-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The present invention encompasses a method of inter-network hand-offs between a plurality of different wireless data networks. The method comprises the steps of: receiving RF measurements from a plurality of wireless data network base stations; comparing each of the received RF measurements to a predetermined minimum RF threshold; selecting one of the plurality of different wireless networks; requesting a wireless communications device through a wired connection with a plurality of network radio frequency modems to communicate with the selected wireless network; communicating the request through radio frequencies to an inter-network router connected to current wireless data network; generating a list of hand-off candidates for the wireless communications device; selecting a target base station hand-off candidate based upon a predetermined communications criteria; communicating the hand-off candidate to the wireless communications device; tuning to communications channel for facilitation of wireless communication with the hand-off candidate; and performing any necessary protocol conversion.

Inventors

  • 👤 Gregory M. Durant
  • 👤 Danny K. Hsu
  • 👤 Kenny Xiaojian Huang
  • 👤 Jesse Eugene Russell
  • 👤 Robert Edward Schroeder
  • 👤 Edward L. Wallace

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 15:07
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0083; H04W36/00835; H04W36/008355; H04W36/14; H04W36/24; H04W36/30; H04W36/302

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 147 words
A method of inter-network hand-offs between a plurality of different wireless data networks, said method comprising the steps of: receiving RF measurements from a plurality of wireless data network base stations; comparing each of said received RF measurements to a predetermined minimum RF threshold; CHARACTERIZED BY: selecting one of said plurality of different wireless networks; requesting a wireless communications device through a wired connection with a plurality of network radio frequency modems to communicate with said selected wireless network; communicating said request through radio frequencies to an inter-network router connected to current wireless data network; generating a list of hand-off candidates for said wireless communications device; selecting a target base station hand-off candidate based upon a predetermined communications criteria; communicating said hand-off candidate to said wireless communications device; tuning to communications channel for facilitation of wireless communication with said hand-off candidate; and performing any necessary protocol conversion.
Claim 2
Dependent Claim 38 words
The method as recited in claim 1 wherein the step of performing any necessary protocol conversion further comprises performing any necessary protocol conversion of out-bound messages sent from an originating wireless data network to said wireless communications device.
Claim 3
Dependent Claim 35 words
The method as recited in claim 1 wherein the step of performing any necessary protocol conversion further comprises performing any necessary protocol conversion of in-bound messages sent from said wireless communications device to said network.
Claim 4
Dependent Claim 20 words
The method as recited in claim 1 further comprising the step of communicating said RF measurements to a protocol converter.
Claim 5
Dependent Claim 26 words
The method as recited in claim 4 wherein a plurality of network radio frequency modems are used for communicating said RF measurements to said protocol converter.
Claim 6
Dependent Claim 25 words
The method as recited in claim 1 wherein said predetermined minimum RF threshold is selected for viable wireless communications with a particular wireless data network.
Claim 7
Dependent Claim 31 words
The method as recited in claim 1 wherein said list of hand-off candidates is generated as a function of location information from a routing table maintained for said wireless communications device.
Claim 8
Dependent Claim 20 words
The method as recited in claim 1 wherein the step of receiving RF measurements further comprises receiving RF measurements continually.
Claim 9
Dependent Claim 37 words
The method as recited in claim 1 wherein the step of selecting one of said plurality of different wireless networks is a function of comparing each of said received RF measurements to said predetermined minimum RF threshold.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag