US5671219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication protocol for spread spectrum communication
Assignee: Intel Corp
•
Filing: 1995-06-07
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Granted: 1997-09-23
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Expires: 2015-06-07
Abstract
Abstract A simple and flexible over-air protocol for use with a mobile telephone system, having hand-held telephones in a microcell or other type of cellular communication system. A method in which user stations communicate with one or more base stations to place and receive telephone calls, in which the user stations are provided a secure voice or data link and have the ability to handoff calls between base stations while such calls are in progress. Each base station has a set of "air channels" to which it transmits in sequence. The air channels supported by each base station are called that base station's "polling loop". A user station receives general polling information on an unoccupied air channel, transmits responsive information to the base station, and awaits acknowledgment from the base station. Each base station may therefore simultaneously maintain communication with as many user stations as there are air channels in its polling loop. The ability of a user station to communicate on any unoccupied air channel makes the protocol air-channel agile, while the stability of user station and base station clocks may define air channels, gaps, and minor frames.
Inventors
- 👤 Ryan N. Jensen
- 👤 Claude M. Williams
- 👤 Logan Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:09
CPC Classifications
H; H04; H04W; H04W74/00; H04W74/04; H04W74/06; G; G10; G10L; G10L19/00; G10L19/012; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2618; H04B7/2643; H04L; H04L1/00; H04L1/0001; H04L1/0002; H04L1/0023; H04L1/0025; H04L1/20; H04L47/00; H04L47/50; H04L47/52; H04L47/522; H04L47/62; H04L47/6215; H04L49/00; H04L49/90; H04L49/901; H04W36/00; H04W36/0005; H04W36/0055; H04W36/0058; H04W36/24; H04W36/30; H04W36/302; H04W52/00; H04W52/04; H04W52/06; H04W52/08; H04W52/30; H04W52/36; H04W52/38; H04W52/40; H04W72/00; H04W72/20; H04W8/00; H04W8/02; H04W8/04; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0805; H04B7/10; H04B7/2662; H04B7/2668; H04W24/00; H04W24/10; H04W36/16; H04W36/18; H04W52/18; H04W52/24; H04W52/362; H04W52/367; H04W56/00; H04W72/04; H04W72/044; H04W72/0446; H04W76/00; H04W76/10; H04W92/00; H04W92/04; H04W92/12
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
178 words
A communication protocol for time division multiple access communication comprising a major time frame divided into a plurality of minor time frames, said minor time frames collectively capable of supporting a plurality of communication links between a base station and a plurality of user stations, a control pulse interval in a first one of said minor time frames, whereby a control pulse is transmitted to said base station from a user station in communication with said base station, means in said base station for measuring a received signal quality of said control pulse, a base transmission interval in said first minor time frame, whereby a base-to-user spread spectrum signal is transmitted from said base station to said user station using an antenna selected in response to said received signal quality, said base-to-user spread spectrum signal comprising a power adjustment command, a user transmission interval in said first minor time frame, whereby a user-to-base spread spectrum signal is transmitted from said user station to said base station at a power level determined in response to said power adjustment command.
Claim 2
Dependent Claim
178 words
A communication protocol for time division multiple access communication comprising a major time frame divided into a plurality of minor time frames, said minor time frames collectively capable of supporting a plurality of communication links between a base station and a plurality of user stations, a control pulse interval in a first one of said minor time frames, whereby a control pulse is transmitted to said base station from a user station in communication with said base station, means in said base station for measuring a received signal quality of said control pulse, a base transmission interval in said first minor time frame, whereby a base-to-user spread spectrum signal is transmitted from said base station to said user station using an antenna selected in response to said received signal quality, said base-to-user spread spectrum signal comprising a power adjustment command, a user transmission interval in said first minor time frame, whereby a user-to-base spread spectrum signal is transmitted from said user station to said base station at a power level determined in response to said power adjustment command.
Claim 3
Dependent Claim
29 words
The communication protocol of claim 1 wherein said control pulse, said base-to-user spread spectrum signal, and said user-to-base spread spectrum signal are each transmitted over the same frequency band.
Claim 4
Dependent Claim
13 words
The communication protocol of claim 1 wherein said antenna comprises an omnidirectional antenna.
Claim 5
Dependent Claim
15 words
The communication protocol of claim 1 wherein said antenna comprises a steered phased array antenna.
Claim 6
Dependent Claim
14 words
The communication protocol of claim 1 wherein said antenna comprises a circularly polarized antenna.
Claim 7
Dependent Claim
23 words
The communication protocol of claim 1 wherein an internal synchronization pulse is generated by said base station in response to said control pulse.
Claim 8
Dependent Claim
17 words
The communication protocol of claim 1 wherein said control pulse is transmitted using a spread spectrum technique.
Claim 9
Independent Claim
236 words
A method for time division multiple access communication comprising the steps of defining a series of major time frames, each major time frame divided into a plurality of minor time frames, transmitting with a power level, in a designated minor time frame of a major time frame, a pulse signal from a user station to a base station, said base station capable of communicating with a different user station in each minor time frame of said major time frame, receiving said pulse signal at said base station, measuring a received signal quality in response to said pulse signal, measuring a received signal power of said pulse signal, selecting a base station antenna in response to said received signal quality, transmitting over said base station antenna, in said designated minor time frame of said major time frame, a first spread spectrum signal from said base station to said user station, said first spread spectrum signal comprising a power adjustment command based at least in part on said received signal power, receiving said first spread spectrum signal at said user station, adjusting said power level at said user station in response to said first spread spectrum signal, transmitting with said adjusted power level, in said designated minor time frame of said major time frame, a second spread spectrum signal from said user station to said base station, and receiving said second spread spectrum signal at said base station.
Claim 10
Independent Claim
236 words
A method for time division multiple access communication comprising the steps of defining a series of major time frames, each major time frame divided into a plurality of minor time frames, transmitting with a power level, in a designated minor time frame of a major time frame, a pulse signal from a user station to a base station, said base station capable of communicating with a different user station in each minor time frame of said major time frame, receiving said pulse signal at said base station, measuring a received signal quality in response to said pulse signal, measuring a received signal power of said pulse signal, selecting a base station antenna in response to said received signal quality, transmitting over said base station antenna, in said designated minor time frame of said major time frame, a first spread spectrum signal from said base station to said user station, said first spread spectrum signal comprising a power adjustment command based at least in part on said received signal power, receiving said first spread spectrum signal at said user station, adjusting said power level at said user station in response to said first spread spectrum signal, transmitting with said adjusted power level, in said designated minor time frame of said major time frame, a second spread spectrum signal from said user station to said base station, and receiving said second spread spectrum signal at said base station.
Claim 11
Dependent Claim
33 words
The method of claim 8 wherein said step of measuring a received signal quality comprises the step of measuring at least one of a received power, envelope or phase of said pulse signal.
Claim 12
Dependent Claim
16 words
The method of claim 8 wherein said power adjustment command comprises a plurality of command bits.
Claim 13
Dependent Claim
21 words
The method of claim 8 wherein said power adjustment command comprises one of a discrete set of power adjustment command values.
Claim 14
Dependent Claim
33 words
The method of claim 8 wherein said step of adjusting said power level comprises the step of increasing or decreasing said power level by a relative amount indicated by said power adjustment command.
Claim 15
Dependent Claim
28 words
The method of claim 8 wherein said pulse signal, said first spread spectrum signal, and said second spread spectrum signal are each transmitted over the same frequency band.
Claim 16
Dependent Claim
14 words
The method of claim 8 wherein said base station antenna comprises an omnidirectional antenna.
Claim 17
Dependent Claim
16 words
The method of claim 8 wherein said base station antenna comprises a steered phased array antenna.
Claim 18
Dependent Claim
15 words
The method of claim 8 wherein said base station antenna comprises a circularly polarized antenna.
Claim 19
Dependent Claim
25 words
The method of claim 8 further comprising the step of generating an internal synchronization pulse at said base station in response to said pulse signal.
Claim 20
Dependent Claim
16 words
The method of claim 8 wherein said pulse signal is transmitted using a spread spectrum technique.
Claim 21
Dependent Claim
184 words
A communication protocol for time division multiple access communication comprising a major time frame divided into a plurality of minor time frames, said minor time frames collectively capable of supporting a plurality of communication links between a base station and a plurality of user stations, a control pulse interval in a each of said minor time frames, wherein a control pulse is transmitted to a base station from one of said plurality of user stations using said minor time frame for communication, means in said base station for measuring a received signal quality of said control pulse, a base transmission interval in each of said minor time frames, wherein a first spread spectrum signal is transmitted from said base station to said user station using an antenna selected in response to said received signal quality, said first spread spectrum signal comprising a power adjustment command, a user transmission interval in each of said minor time frames, wherein a second spread spectrum signal is transmitted from said user station to said base station at a power level determined in response to said power adjustment command.
Claim 22
Dependent Claim
184 words
A communication protocol for time division multiple access communication comprising a major time frame divided into a plurality of minor time frames, said minor time frames collectively capable of supporting a plurality of communication links between a base station and a plurality of user stations, a control pulse interval in a each of said minor time frames, wherein a control pulse is transmitted to a base station from one of said plurality of user stations using said minor time frame for communication, means in said base station for measuring a received signal quality of said control pulse, a base transmission interval in each of said minor time frames, wherein a first spread spectrum signal is transmitted from said base station to said user station using an antenna selected in response to said received signal quality, said first spread spectrum signal comprising a power adjustment command, a user transmission interval in each of said minor time frames, wherein a second spread spectrum signal is transmitted from said user station to said base station at a power level determined in response to said power adjustment command.
Claim 23
Dependent Claim
29 words
The communication protocol of claim 19 wherein said control pulse, said first spread spectrum signal, and said second spread spectrum signal are each transmitted over the same frequency band.
Claim 24
Dependent Claim
13 words
The communication protocol of claim 19 wherein said antenna comprises an omnidirectional antenna.
Claim 25
Dependent Claim
15 words
The communication protocol of claim 19 wherein said antenna comprises a steered phased array antenna.
Claim 26
Dependent Claim
14 words
The communication protocol of claim 19 wherein said antenna comprises a circularly polarized antenna.
Claim 27
Dependent Claim
23 words
The communication protocol of claim 19 wherein an internal synchronization pulse is generated by said base station in response to said control pulse.
Claim 28
Dependent Claim
17 words
The communication protocol of claim 19 wherein said control pulse is transmitted using a spread spectrum technique.
Claim 29
Dependent Claim
129 words
In a spread spectrum wireless communication system employing time division duplex communication, a method comprising the steps of transmitting, during a designated portion of a time interval, a control pulse from a user station to a base station, receiving said control pulse at said base station, generating an internal synchronization pulse at said base station in response to said control pulse, measuring an indication of link quality in response to said control pulse, including the step of measuring a received signal power of said control pulse, selecting an antenna for a subsequent spread spectrum transmission from said base station to said user station based upon said indication of link quality, and commanding said user station to adjust a transmission power in response to at least said received signal power.
Claim 30
Dependent Claim
129 words
In a spread spectrum wireless communication system employing time division duplex communication, a method comprising the steps of transmitting, during a designated portion of a time interval, a control pulse from a user station to a base station, receiving said control pulse at said base station, generating an internal synchronization pulse at said base station in response to said control pulse, measuring an indication of link quality in response to said control pulse, including the step of measuring a received signal power of said control pulse, selecting an antenna for a subsequent spread spectrum transmission from said base station to said user station based upon said indication of link quality, and commanding said user station to adjust a transmission power in response to at least said received signal power.
Claim 31
Dependent Claim
16 words
The method of claim 26 wherein said control pulse is transmitted using a spread spectrum technique.
Claim 32
Dependent Claim
119 words
A time frame structure for wireless communication comprising: a major time frame, and a plurality of minor time frames in said major time frame, each minor time frame comprising a first interval wherein an assigned user station transmits a first spread-spectrum user station signal over a designated frequency band to a base station, a second interval wherein said base station transmits a spread-spectrum base station signal over said designated frequency band to said assigned user station, said assigned user station adjusting a transmission power level in response to receiving said spread-spectrum base station signal, and a third interval wherein said assigned user station transmits a second spread-spectrum user station signal over said designated frequency band to said base station.
Claim 33
Dependent Claim
119 words
A time frame structure for wireless communication comprising: a major time frame, and a plurality of minor time frames in said major time frame, each minor time frame comprising a first interval wherein an assigned user station transmits a first spread-spectrum user station signal over a designated frequency band to a base station, a second interval wherein said base station transmits a spread-spectrum base station signal over said designated frequency band to said assigned user station, said assigned user station adjusting a transmission power level in response to receiving said spread-spectrum base station signal, and a third interval wherein said assigned user station transmits a second spread-spectrum user station signal over said designated frequency band to said base station.
Claim 34
Dependent Claim
177 words
In a time division multiple access communication system, a method for communicating comprising the steps of: defining a plurality of major time frames, each major time frames comprising a plurality of minor time frames, and each minor time frame capable of supporting a communication link between a base station and one of a plurality of user stations, transmitting, during a first interval of a minor time frame and over a designated frequency band, a spread-spectrum user station signal from a user station to said base station, receiving said spread-spectrum user station signal at said base station, measuring at said base station a relative signal quality of said spread-spectrum user station signal, selecting a base station antenna from among a plurality of base station antennas in response to receiving said spread-spectrum user station signal at said base station, transmitting, during a second interval of said minor time frame and over said designated frequency band, a spread-spectrum base station signal from said base station to said user station, and receiving said spread-spectrum base station signal at said user station.
Claim 35
Dependent Claim
177 words
In a time division multiple access communication system, a method for communicating comprising the steps of: defining a plurality of major time frames, each major time frames comprising a plurality of minor time frames, and each minor time frame capable of supporting a communication link between a base station and one of a plurality of user stations, transmitting, during a first interval of a minor time frame and over a designated frequency band, a spread-spectrum user station signal from a user station to said base station, receiving said spread-spectrum user station signal at said base station, measuring at said base station a relative signal quality of said spread-spectrum user station signal, selecting a base station antenna from among a plurality of base station antennas in response to receiving said spread-spectrum user station signal at said base station, transmitting, during a second interval of said minor time frame and over said designated frequency band, a spread-spectrum base station signal from said base station to said user station, and receiving said spread-spectrum base station signal at said user station.
Claim 36
Dependent Claim
47 words
The method of claim 29 wherein said step of measuring at said base station a relative signal quality of said spread-spectrum user station signal further comprises the step of measuring at least one of a received signal power, envelope or phase of said spread-spectrum user station signal.
Claim 37
Dependent Claim
191 words
In a time division multiple access communication system, a method of communicating comprising the steps of: (a) dividing each of a series of major time frames into a plurality of minor time frames, said minor time frames collectively supporting communication between a base station and a plurality of user stations, (b) transmitting, during a first interval of a minor time frame and over a designated frequency band, a spread-spectrum user station signal from a user station to said base station, (c) receiving said spread-spectrum user station signal at said base station, (d) measuring at said base station a signal quality of said spread-spectrum user station signal, (e) selecting at least one base station antenna from among a plurality of base station antennas, (f) transmitting using said at least one base station antenna, during a second interval of said minor time frame and over said designated frequency band, a spread-spectrum base station signal from said base station to said user station, (g) receiving said spread-spectrum base station signal at said user station, and (h) repeating steps (b) through (g) at the occurrence of said minor time frame in each major time frame.
Claim 38
Dependent Claim
191 words
In a time division multiple access communication system, a method of communicating comprising the steps of: (a) dividing each of a series of major time frames into a plurality of minor time frames, said minor time frames collectively supporting communication between a base station and a plurality of user stations, (b) transmitting, during a first interval of a minor time frame and over a designated frequency band, a spread-spectrum user station signal from a user station to said base station, (c) receiving said spread-spectrum user station signal at said base station, (d) measuring at said base station a signal quality of said spread-spectrum user station signal, (e) selecting at least one base station antenna from among a plurality of base station antennas, (f) transmitting using said at least one base station antenna, during a second interval of said minor time frame and over said designated frequency band, a spread-spectrum base station signal from said base station to said user station, (g) receiving said spread-spectrum base station signal at said user station, and (h) repeating steps (b) through (g) at the occurrence of said minor time frame in each major time frame.
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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) | 2000-09-22 | 2001-03-24 | 2001-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-22 | 2005-03-24 | 2005-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-22 | 2009-03-24 | 2009-09-23 | $7700.00 | Window Closed / Lapsed |