§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US5852604A Expired / Lapsed US ⏱️ 0.0 years remaining

Modularly clustered radiotelephone system

Assignee: InterDigital Technology Corp
•
Filing: 1996-05-20
•
Granted: 1998-12-22
•
Expires: 2016-05-20
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A power-conserving time division multiple access (TDMA) radio telephone system is disclosed in which a cluster of subscriber stations, remote from a base station, employs a common pool of frequency-agile modems each of which digitally synthesizes, on a timeSlot-by-timeSlot basis, the different channel-identifying intermediate frequencies needed to support communications between several of the subscriber stations and the base station. Power conservation is facilitated inter alia by controlling the assignment of modems to calls, maintaining unassigned modems in a powered-down state and by controlling the number of calls using the same time slot. Delay in assigning a powered-down modem to a call is eliminated by making available to all modems the highest quality synchronization information obtained by any of the active modems.

Inventors

  • 👤 David M. Cooley
  • 👤 Joseph J. Digiovanni
  • 👤 John D. Kaewell
  • 👤 Scott D. Kurtz
  • 👤 Mark A. Lemmo
  • 👤 Michael W. Regensburg
  • 👤 David Vessal
  • 👤 Eric Johns

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 04:09
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/0635; H04J3/0685; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2643; H04B7/2656; H04L; H04L27/00; H04L27/18; H04W; H04W56/00; H04W72/00; H04W72/50; H04W72/56; H04W84/00; H04W84/02; H04W84/10; H04W84/14; H04W88/00; H04W88/02; H04W88/021; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04B1/1615; H04W48/00; H04W48/08; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0216; H04W72/04; H04W72/044; H04W72/0446; H04W72/20; H04W72/23; H04W74/00; H04W74/08; H04W74/0866; H04W74/0891; H04W88/08; Y; Y02; Y02D; Y02D30/00; Y02D30/70

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 86 words
A method of minimizing synchronization delay in a radiotelephone system between a modular subscriber cluster communicating with a common base station, the modular subscriber cluster receiving repetitive time slots from the base station and having a plurality of frequency-agile modems, the method comprising the steps of: synchronizing a selected one of the modems to a selected time slot of the received time slots; generating a frame sync signal from said selected modem; and distributing said frame sync signal to remaining ones of the plurality of modems.
Claim 2
Independent Claim 86 words
A method of minimizing synchronization delay in a radiotelephone system between a modular subscriber cluster communicating with a common base station, the modular subscriber cluster receiving repetitive time slots from the base station and having a plurality of frequency-agile modems, the method comprising the steps of: synchronizing a selected one of the modems to a selected time slot of the received time slots; generating a frame sync signal from said selected modem; and distributing said frame sync signal to remaining ones of the plurality of modems.
Claim 3
Dependent Claim 79 words
The method according to claim 1 wherein said synchronizing step further comprises the steps of: receiving a plurality of channel-identifying frequencies from the common base station, each of said channels containing a synchronization time slot; instructing the plurality of modems to search said channels for said synchronization time slot; locating within one of said channels said synchronization time slot by one of the plurality of modems; and assigning said one of the plurality of modems as said selected modem.
Claim 4
Dependent Claim 47 words
The method according to claim 1 wherein said distributing step further comprises the steps of: sourcing said frame sync signal over a common bus coupled to all of the plurality of modems; and aligning each of the plurality of modems start frame with said frame sync signal.
Claim 5
Dependent Claim 52 words
The method according to claim 2 further comprising the steps of: determining synchronization parameters for each active modem from the plurality of modems; ascertaining reliability from said synchronization parameters; identifying from said synchronization parameters the modem with the highest reliability; and designating said modem with the highest reliability as said selected modem.

References Cited (Backward Citations)

US2070418A Cited
US2941038A Cited
US2808504A Cited
US3150374A Cited
US3332016A Cited
US3341776A Cited
US3348150A Cited
GB1087188A Cited
US3471646A Cited
GB1160794A Cited
US3497627A Cited
US3534264A Cited
US3499995A Cited
US3576398A Cited
US3529243A Cited
US3505479A Cited
US3532985A Cited
US3564147A Cited
US3631520A Cited
US3546684A Cited
US3643031A Cited
US3641274A Cited
US3601545A Cited
US3626295A Cited
US3639739A Cited
US3573379A Cited
US3644678A Cited
US3683116A Cited
US3634627A Cited
US3654395A Cited
US3710027A Cited
DE2020094C3 Cited
US3742498A Cited
US3750024A Cited
US3740476A Cited
US3806879A Cited
US3812430A Cited
US3818453A Cited
US3889063A Cited
US3836726A Cited
US3864524A Cited
US3827052A Cited
FR2175833B3 Cited
US3829670A Cited
GB1371185A Cited
US4013840A Cited
US3891959A Cited
US3894194A Cited
US3824543A Cited
US4051332A Cited
US3820112A Cited
CA1035476A Cited
DE2362855A1 Cited
US3922496A Cited
US4031330A Cited
US4071711A Cited
US3982241A Cited
US3932821A Cited
US4009344A Cited
US4009345A Cited
US4009347A Cited
US4009343A Cited
US3959595A Cited
US4027243A Cited
US4079371A Cited
US4109101A Cited
US4064378A Cited
US4086536A Cited
US4004226A Cited
US4020332A Cited
US4054753A Cited
US4121158A Cited
US4020461A Cited
US4048443A Cited
US4021616A Cited
US4129749A Cited
GB1584621A Cited
US4058713A Cited
US4398062A Cited
GB1562964A Cited
DE2659635B2 Cited
DE2659596C2 Cited
US4112372A Cited
DE2715332C2 Cited
US4100377A Cited
US4335446A Cited
GB2003366B Cited
US4143246A Cited
DE2838757C2 Cited
GB2004098B Cited
US4229822A Cited
US4397019A Cited
US4110560A Cited
US4216354A Cited
EP0003633B2 Cited
US4193031A Cited
US4222115A Cited
DE2812009C2 Cited
US4236254A Cited
US4133976A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2001-12-21 2002-06-22 2002-12-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2005-12-21 2006-06-22 2006-12-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2009-12-21 2010-06-22 2010-12-22 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag