United States Patent [19]
`Cameron et al.
`
`l|Il|lllllllll|||llllllllllllgLllllslllllllllllllllllllllllllllllllllllll
`
`90403A
`
`[11]
`Patent Number: '
`[45] Date of Patent:
`
`5,590,403
`Dec. 31, 1996
`
`[54] METHOD AND SYSTEM FOR EFFICIENTLY
`PROVIDING TWO WAY COMMUNICATION
`BETWEEN A CENTRAL NETWORK AND
`MOBILE UNIT
`
`[75] Inventors: Dennis W. Cameron, Jackson, Miss.;
`Walter C. Roehr, Jr., Reston, Va.;
`Rade Petrovic, Oxford; Jai P. Bhagat,
`Jackson, both of Miss.; Masood
`Garahi, Madison; William D. Hays,
`Jackson, both of Miss.; David W.
`Ackerman, Washington, DC.
`
`[73] Assignee: Destineer Corporation, Jackson, Miss.
`
`[21] App]. No.: 973,918
`[22] Filed:
`Nov. 12, 1992
`
`[51] Int. Cl.6 ..................................................... .. H04B 7/06
`[52] US. Cl. ..................... .. 455/51.2; 455/33.4; 455/34.1;
`455/56.1; 455/59; 455/101; 375/299
`[58] Field of Search ................................ .. 455/33.1, 33.2,
`455/33.4, 34.1, 34.2, 51.2, 54.1, 54.2, 59,
`56.1, 63, 101, 102, 103; 370/953, 77; 375/260,
`267, 299
`
`[56]
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`4,490,830 12/1984 Kai et al. ................................ .. 455/59
`4,570,265
`2/1986 Thro ............. ..
`455/59
`4,968,966 11/1990 Jasinki et al. ........................ .. 45551.2
`
`FOREIGN PATENT DOCUMENTS
`
`WO91/18458 11/1991 WIPO .................................. .. 455/101
`WO9211707 7/1992 WIPO ................................. .. 455/33.1
`
`Primary Examiner~Reinhard J. Eisenzopf
`Assistant Examiner-Thanh Le
`Attorney, Agent, or Firm—-Finnegan, Henderson, Farabow,
`Garrett & Dunner, L.L.P.
`
`ABSTRACT
`[57]
`A two-way communication system for communication
`between a system network and a mobile unit. The system
`network includes a plurality of base transmitters and base
`receivers included in the network. The base transmitters are
`divided into zonal assignments and broadcast in simulcast
`using multi-carrier modulation techniques. The system net
`work controls the base transmitters to broadcast in simulcast
`during both systemwide and zonal time intervals. The sys
`tem network dynamically alters zone boundaries to maxi
`mize information throughput. The preferred mobile unit
`includes a noise detector circuit to prevent unwanted trans
`missions. The system network further provides an adaptive
`registration feature for mobile units which controls the
`registration operations by the mobile units to maximize
`information throughput.
`
`4,223,405
`4,392,242
`
`9/1980 Hattori et a1. .......................... .. 455/59
`7/1983 Kai ................ ..
`455/34.1
`
`12 Claims, 30 Drawing Sheets
`
`Generating a system information
`signal which includes a plurality of
`blocks of information
`
`")2
`/
`
`Transmitting the system information
`signal to the plurality of transmitters
`
`A04
`
`Transmitting by the ?rst and second
`sets of transmitters a ?rst block of
`information in simulcast during the first
`time period
`
`706
`
`708
`
`TIO
`
`Transmitting by the first set of
`transmitters a second block of
`information during the second
`time period
`
`Transmitting by the second set of
`transmitters a third block of
`information during the second
`time period
`
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`

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`US. Patent '
`
`Dec. 31, 1996
`
`Sheet 1 of 30
`
`5,590,403
`
`Transmitter
`
`transmitter
`
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`US. Patent
`
`Dec. 31, 1996
`
`Sheet 2 of 30
`
`5,590,403
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`5,590,403
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`
`
`FIG‘. 5 PRIOR ART
`
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`US. Patent
`
`Dec. 31, 1996
`
`Sheet 7 of 30
`
`5,590,403
`
`'F/G.7
`
`700
`
`Generating a system information
`signal which includes a plurality of
`blocks of information
`
`702
`/
`
`Transmitting the system information
`signal to the plurality of transmitters
`
`/‘(()4
`
`Transmitting by the ?rst and second
`706
`sets of transmitters a first block of
`information in simulcast during the first /
`time period
`
`‘7
`
`/?08
`
`V
`
`/7l0
`
`Transmitting by the first set of
`transmitters a second block of
`information during the second
`time period
`
`Transmitting by the second set of
`transmitters a third block of
`information during the second
`time period
`'
`
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`US. Patent
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`Dec. 31, 1996
`
`Sheet 8 of 30
`
`5,590,403
`
`FIG: 8
`
`800
`\
`
`Transmitting a message signal by a
`base transmitter servicing a zone
`where the mobile transceiver was. last
`known to be located
`
`,802
`
`V
`
`Transmitting a regional probe signal
`by a plurality of base transmitters
`servicing a plurality of zones if the
`mobile transceiver does not indicate
`receipt of the message signal from the i304
`base transmitter
`'
`
`7
`
`Receiving the regional probe signal by
`the mobile transceiver
`
`806
`
`V
`
`Transmitting an acknowledgment
`signal by the mobile transceiver in
`response to the received regional
`probe signal
`
`#308
`
`7
`
`Receiving the acknowledgment signal
`from the mobile transceiver by a base
`receiver
`
`8'0
`
`Updating the data to reflect the zone
`of the base receiver that received the
`acknowledgment signal as the last
`known location of the mobile
`transceiver
`
`/8|2
`
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`US. Patent
`
`Dec. 31, 1996
`
`Sheet 9 0f 30
`
`[Iv NE» All
`
`\ \
`
`8m . NNm 2m 3m 2
`
`mg 3w Km 0% m6 m6 8m
`
`Tll NIx Pm |||L
`
`wow
`
`>ocmzwmi
`
`NIx Om
`
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`US. Patent
`
`Dec. 31, 1996
`
`Sheet 10 of 30
`
`5,590,403
`
`F l6‘. I0
`
`1002
`SW1
`F1 @ \(IOIZ
`
`1004
`SW2
`F2 @ \d0|4
`
`I000
`/
`
`A022
`
`‘006
`
`SW3
`
`Signal
`
`.SWn
`Fn CK} W0
`
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`US. Patent
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`Dec. 31, 1996
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`Sheet 11 of 30
`
`5,590,403
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`FIG. 11
`
`FREQUENCY
`CONTROL
`SIGNAL 1
`
`FREQUENCY
`CONTROL
`SIGNAL 2
`
`FREQUENCY
`CONTROL
`SIGNAL 3
`
`FREQUENCY
`CONTROL
`SIGNAL 4
`
`FREQUENCY
`CONTROL
`SIGNAL n
`
`1102
`
`1
`
`1104
`
`1106
`
`1108
`
`@— MODULATOR 1112
`@— MODULATOR 1114
`{1116
`®—— MODULATOR
`@— MODULATOR (1118
`
`f
`
`f
`
`} 1100
`
`I112
`
`1
`
`1
`
`1
`
`1110
`
`1
`
`®—~ MODULATOR
`
`f
`1120
`
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`U.S. Patent
`
`Dec. 31, 1996
`
`Sheet 12 of 30
`
`5,590,403
`
`F1
`
`F2
`
`CONTROL
`slGNAL 1
`
`CONTROL
`S|GNAL2
`
`CONTROL
`SIGNAL 3
`
`CONTROL
`SIGNAL 4
`
`FIG. 12
`
`1202
`IN PHASE
`QUADRATURE
`
`1204
`IN PHASE
`QUADRATURE
`
`1206
`IN PHASE
`
`QUADRATURE
`
`1208
`IN PHASE
`m QUADFIATUFIE
`
`1200
`f
`
`f1210
`
`2 ———*~
`
`FOUR CARRIER OUADRATURE MODULATOR
`
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`US. Patent
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`Dec. 31, 1996
`
`Sheet 14 of 30
`
`5,590,403
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`33
`
`EEQEOQ
`
`mm:
`
`8:
`
`
`
`EEEwcQP @wmm
`
`2% 8s\
`QE<§>§ 65:82 f a
`
`
`2% a?
`
`“ME/‘52E 63502 f a
`
`a? 9%
`
`
`arc/‘630i 68582 f a
`
`
`QE<§§ gauge a
`a: N5
`
`_ _
`_ _ _ _ _ _
`_ _ _ _
`_ _
`
`ma EX
`
`95 E55 EEDUOE f 5
`
`23%
`SE:
`
`Bad
`
`6:50
`
`053
`
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`US. Patent
`
`Dec. 31, 1996
`
`Sheet 16 of 30
`
`5,590,403
`
`82
`
`
`
`
`
`U335 U325 @335 w 02
`QQWU £0 50 Nan 50 5O
`
`
`
`628mg; @522
`
`
`
`
`
`6.1 @501 mm 30> __.>>
`
`ONE /
`
`2955
`
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`US. Patent
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`Dec. 31, 1996
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`Sheet 17 of 30
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`5,590,403
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`FIG. /7
`
`Mobile Receiver
`
`I700
`
`n02
`‘(woe
`Receiver
`
`/
`
`W08
`Display and
`Storage Logic
`
`Annuncialor
`
`Display
`
`Controls '
`
`Display
`(LCD)
`
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`Dec. 31, 1996
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`Sheet 18 of 30
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`5,590,403
`
`82
`
`mswwwuoi
`
`5508mm
`
`5:325
`
`a?
`
`
`
`
`
`623mm mwmm mo_mc<
`
`52358 628mm
`
`
`Ecemwm. 8% ~31 mo_mc<
`
`82 W
`
`mswwmooi
`
`AL
`
`?coamm
`
`5525
`
`82
`
`
`
`628mm wmmm__w:m5
`
`
`
`\%\m.\ .m\...\
`
`
`2% 2.25058 mo_mc<
`L 628mm
`
`
`
`Q51 8% 82
`
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`US. Patent
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`Dec. 31, 1996
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`Sheet 19 of 30
`
`5,590,403
`
`FIG‘. /9
`
`EH00
`Anaiog /l802
`Receiver
`
`/i8|0
`Demodulator
`
`I906
`Error ‘
`Correction /
`Circuit
`
`I908
`Store &
`Forward /
`Circuit
`
`‘9m
`/
`
`[I808
`
`Regional
`Processing
`Circuitry
`
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