.
`United States Patent
`
`1
`
`QUOAAAA
`US005 1684934
`11]
`Patent Number:
`5,168,493
`’
`’
`
`Nelson et al.
`[45] Date of Patent:
`Dec. 1, 1992
`
`
`[54] TIME DIVISION MULTIPLEXED
`SELECTIVE CALL SYSTEM
`
`[75]
`
`Inventors: Leonard E, Nelson, Boynton Beach;
`Robert J. Schwendeman, Pompano
`Beach; Michael J. DeLuca, Boca
`Raton; David F. Willard, Popano
`.
`,
`:
`Beaerryi A. Sandvos,Davie,
`
`*
`.
`,
`Elmhurst, Ill.
`{73] Assignee: Motorola, Inc., Schaumburg,II].
`{21] Appl. No.: 793,230
`[22] Filed:
`Nov. 8, 1991
`
`[63]
`
`§,001,471
`3/1991 Snowden et al.
`...............-... 455/343
`FOREIGN PATENT DOCUMENTS
`0264205A2 4/1988 European Pat. Off.
`.
`8601357
`2/1986 World Int. Prop. O.wes 370/84
`Primary Examiner—Douglas W. Olms
`Assistant Examiner—Alpus H. Hsu
`Attorney, Agent, or Firm—Daniel R. Collopy; William
`Related U.S, Application Data
` E Koch; Thomas G. Berry
`Continuation of Ser. No. 459,485, Jan. 2, 1990, aban.
`[57]
`ABSTRACT
`doned.
`A signalling protocol comprising a plurality of inter-
`[51] Unt, Cho cceceeseereenees H04Q 7/00; HO4J 3/22
`leaved phases is transmitted at various baud rates, the
`[52] WLS. Che ececcccecteecscceenecnecnaaneneee 370/84; 370/112;
`various baud rates being multiples of a base baudrate.
`340/825.44; 455/38.1
`[58] Field of Search ............s::e:se 370/79, 80, 81, 84,|The signalling protocol allows a selective call receiver
`370/95.1, 95.3, 104.1, 112, 118; 340/825.44,
`to decode at an operating baud rate equivalent to the
`825.47, 825, 48, 825, 52; 455/38, 343_base baudrate irrespective of the transmission baud rate
`‘
`by decoding only a portion ofthe transmitted signal, the
`[56]
`References Cited
`portion decoded determined by the baud rate and the
`U.S. PATENT DOCUMENTS
`address of the selective call receiver.
`4,506,262
`3/1985 Vance et al. -...... eee 340/825.44
`4,518,961
`5/1985 Davis et al. oe 340/825.44
`
`....ccesseceseenees 455/38
`2/1987 Ohyagi et al.
`© 4,642,632
`...ceseeseseeees 371/24
`3/1987 DeLuca et al.
`4,649,538
`
`.
`5/1988 Nagata etal. ....
`455/343
`4,745,408
`7/1988 DeLuca .cssssessersssseeseesnes 340/825.44
`4,755,816
`
`.. 340/825.44
`4,816,820 3/1989 Davis........
`4,882,726 11/1989 Lang et al.
`.ss.cscssscsessssessnseneees 370/84
`4,918,437
`4/1990 Jasinski et al.
`...
`»» 340/825.44
`4,949,339 8/1990 Shimadaet al.
`.......--.-cseccee 370/112
`
`4,953,180 8/1990 Fieschi et al. cessnsssscesesneen 370/84
`
`22 Claims, 23 Drawing Sheets
`
`
`159
`
`
`
`
`
`
`SELECTIVE CALL SYSTEM
`
`
`PBX
`
`TERMINAL
`
`
`
`
`P
`
`|
`
`I
`
`P
`
`ce! FPS i pe
`AE l pag! RE
`ts imse ! ES
`o | EEE!
`5
`ri’ Ry
`gp
`i
`155
`4
`157
`156
`152
`
`162a
`
`PHASE
`
`BUFFER
`PHASE
`BUFFER
`
`PHASE
`BUFFER
`
`162d
`
`
`
`TRAFFIC
`ANALYZER
`
`160
`
`FRAME
`BAUD RATE
`SELECTOR
`
`
`
`
`
`
`
`
`
`
`
` =
`
`
`
`
`
`Ex. 2020
`.
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 1 of 36
`
`Rembrandt Wireless
`
`

`

`BLOCK fe
`BLOCK
`BLOCK
`SYNC
`BLOCK
`BLOCK
`BLOCK
`BLOCK
`SEVENTEEN|EIGHTEEN
`BLOCK
`ONE
`.
`TWO
`THREE
`FOUR
`
` 30
`FIVE >
`
`
`
`
`
`yua}ed“SN
`
`7661‘I“99
`
`€ZJO[30948
`
`FIG.1A
`
`C6P'S9L'S
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 2 of 36
`
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`
`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 2 of 23
`
`5,168,493
`
`40
`
`25
`
`Ex. 2020
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`Page 3 of 36
`
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`
`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 3 of 23
`
`5,168,493
`
`LeL07oRu~)SSL
`ZELEOFS¥
`ALIYVd08NOILVWHOSNI
`€
`
`Y,
`
`AUT2HTTTTRTMTAUT
`
`HUTTTT
`HUTT
`
`OTDITA
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 4 of 36
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`Rembrandt Wireless
`
`
`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 4 of 23
`
`5,168,493
`
`
`
`INFORMATION FIG.
`
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`
`Ex. 2020
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`
`Page 5 of 36
`
`

`

`163
`
`TRANSMITTERS
`
`SYSTEM
`
`yuajeg“SN
`
`
`7661‘TE‘90
`
`€ZJOg3094S
`
`€6P‘S9T‘S
`
`162d
`
`FIG. 3
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 6 of 36
`
`Rembrandt Wireless
`
`160
`
`15
`
`TRAFFIC
`ANALYZER
`
`FRAME
`BAUD RATE
`SELECTOR
`
`154
`
`150
`
`162a
`
`
`
`SELECTIVE CALL SYSTEM
`TERMINAL,
`
`
`
`PHASE
`BUFFER
`
`164
`
`P R 0
`
`PC
`RE
`ES
`S
`10
`R
`
`g
`
`aa7
`
`1
`
`PBX
`TERMINAL
`
`—____|
`
`-
`
`I
`
`_
`
`
`
`
`
`BUFFER
`
`
`
`
`DATA
`STREAM
`
`
`
`GENERATOR
`PHASE
`
`BUFFER
`
`
`
`PHASE
`BUFFER
`
`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 6 of 23
`
`5,168,493
`
`SYSTEM STARTUP
`
`
`
`
`
`RECEIVE MESSAGE INFORMATION
`
`167
`
`
`HAS A CALL
`BEEN RECEIVED ON ONEOF THE
`TERMINAL ACCESS PHONE
`
`LINES?
`
`
`
`
`
`
` ADDRESSSTORED INFORMATIONIN THE
`LOOKUP TABLE AS DETERMINED BY THE
`TERMINAL ACCESS PHONE LINE
`
`
`
`'
`
`170
`
`
`READ THE SELECTIVE CALL ADDRESS, THE
`ASSIGNED FRAME, AND THE ASSIGNED PHASE
`
`
`
`
`CONSTRUCT THE SELECTIVE CALL MESSAGE
`IN THE FORMAT: SELECTIVE CALL ADDRESS
`FOLLOWED BY MESSAGEINFORMATION
`
`
`STORE THE SELECTIVE CALL MESSAGEIN
`THE FRAME/CHANNEL BUFFER AS
`
`
`
`DETERMINED BY THE ASSIGNED FRAME
`AND THE ASSIGNED PHASE
`Ex 2090
`FIG. 4A
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 7 of 36
`
`
`
`
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`embisandt Wireless
`
`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 7 of 23
`
`5,168,493
`
`FRAME N CONSTRUCTION ROUTINE
`
`
`172-
`
`
`READ AND COMBINE FRAME N/PHASE
`
`DOES
`ONE, FRAME N/PHASE TWO, FRAME
`
`
`
`N/PHASE THREE, AND FRAME N/PHASE
`BAUD RATE/1200
`
`
`FOUR SELECTIVE CALL MESSAGES
`
`=1?
`
`AND STOREIN CHANNEL ONE BUFFER
`
`
`
`THREE AND FRAME N/PHASE FOUR
`SELECTIVE CALL MESSAGES AND
`STORE IN CHANNEL TWO BUFFER
`
`
`READ AND COMBINE FRAME N/PHASE
`
`DOES
`ONE AND FRAME N/PHASE TWO
`
`
`BAUD RATE/1200
`SELECTIVE CALL MESSAGES AND
`
`= 2?
`
`
`
`STORE IN CHANNEL ONE BUFFER
`
`
` READ AND COMBINE FRAME N/PHAS
`
`
`
`READ AND COMBINE FRAME N/PHASE
`979
`ONE SELECTIVE CALL MESSAGES AND
`
`
`STORE IN CHANNEL ONE BUFFER
`
`
`BAUD RATE/1200
`
`
`
`= 4?
`READ AND COMBINE FRAME N/PHASE
`TWO SELECTIVE CALL MESSAGES AND
`
`
`
`STORE IN CHANNEL TWO BUFFER
`
`
`
`READ AND COMBINE FRAME N/PHASE
`
`|THREE SELECTIVE CALL MESSAGES AND
`STORE IN CHANNEL THREE BUFFER
`
`N=N+1 READ AND COMBINE FRAME N/PHASE
`
`DOES
`
`183
`
`‘
`
`
`PERFORM DIFFERENT
`PROTOCOL
`CONSTRUCTION
`
`
`FOUR SELECTIVE CALL MESSAGES AND
`
`STORE IN CHANNEL FOUR BUFFER
`
`
`
`
`
`8)
`
`FIG. 4B
`
`Ex. 2020
`.
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 8 of 36
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`

`

`U.S. Patent
`
`Dec, 1, 1992
`
`Sheet 8 of 23
`
`5,168,493
`
`:
`
`FILL EACH CHANNEL BUFFER TO
`CAPACITY BY ADDING IDLE WORDS
`
`DEFINE FRAME N SYNC BLOCK
`
`174
`
`184
`
`185
`
`SAMPLE SYNC BLOCK AT FRAME N
`BAUD RATE AND SEPARATE INTO
`
`(8)
`
`193
`
`STORE SYNC BLOCK PHASEDff1@6
`SAMPLES TO SAME PHASE BUFFER
`A=1
`
`BAUD RATE/1200) PHASES
`
`
`
`
`READ EIGHT CODE WORDS
`IN CHANNEL A BUFFER
`
`INTERLEAVE EIGHT
`CODE WORDS
`
`192
`
`STORE INTERLEAVED INFORMATION
`BLOCK IN PHASE BUFFERA
`
`A=A+1
`
`NO
`
`
`
`
`
`
`HAVE ALL CODE
`DOES A=
`
`WORDSIN CHANNEL A
`
`BAUD RATE/1200?
`
`BUFFER BEEN READ?
`
`
`FIG. 4C
`
`Yes
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 9 of 36
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`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 9 of 23
`
`5,168,493
`
`DATA STREAM GENERATION ROUTINE
`
`Saat a
`
`IN FRAME N SEND BIT A OF PHASE
`BUFFER B
`
`195
`
`196
`
`197
`
`
`DOES B =
`BAUD RATE/1200?
`
`YES
`
`198
`
`
`
`
`DOES A = THE NUMBER
`OF BITS STOREDIN
`PHASE BUFFER B?
`
`NO
`
`199
`
`A=A+1
`Ba4
`
`YES
`
`200
`
`FIG. 4D
`
`Rembrandt Wireless
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 10 of 36
`
`

`

`202
`
`203
`
`204
`
`RECEIVER/
`DEMODULATOR
`
`RX DATA
`
`CLOCK
`
`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 10 of 23
`
`5,168,493
`
`216
`
`CONTROL
`APPARATUS
`
`PLUG
`
`210
`
`SYNCHRONIZER/
`PHASE
`SELECTOR
`
`SIGNALS
`
`CONTROL
`SIGNALS
`
`SAMPLE
`
`MICRO-
`PROCESSOR
`
`220
`
`222
`
`DEVICE
`
`218
`
`FIG. 5
`
`Ex. 2020
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`Page 11 of 36
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`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 11 of 23
`
`5,168,493
`
`oes CN
`
`rrr
`
`CLOCK
`OSCILLATOR
`
`DATA|
`
`EDGE
`
`
`
`PHASE
`
`
`234
`
`2
`DETECTOR
`COMPARATOR PROGRIMMABLE
`
`
`
`
`
`236
`
`SIXTEEN TIMES
`
`DIVIDE
`BY TWO
`
`240
`
`
`TWO TIMES
`SAMPLE
`CLOCK TIMER
`CLOCK TIMER
`
`
`
`238
`44
`
`242
`
`EIGHT BIT TIMER LATCH
`
`DATA
`
`LE
`
`8
`
`Seon ooo ooo ooo ooo. anna
`
`Ex. 2020
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`Page 12 of 36
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`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 12 of 23
`
`5,168,493
`
`210
`
`RX DATA
`
`
`
`REGISTER
`ADDRESS
`BUSS
`
`
`ENABLE
`
`SAMPLE
`
`SAMPLE
`
`
`r7 \
`
`SYNC TWO
`|| 246
`
`
`
`MICRO-
`CORRELATOR ,
`
`
`
`
`PROCESSOR
`
`254
`ty
`
`FIVE BIT
`Wi!
`ERROR
`|SYNC TWO
`
`SYNC TWO
`COUNTING [| MAGNITUDE
`LOGIC COMPARATOR}—SYNC TWO
`
`
`DETECT
`He]
`24
`
`REFERENCE
`THRESHOLD=256|REGISTER
`
`CLOCKll CLOCK
`
`
`a
`
`aaa -
`
`FIG. 6B
`
`REGISTER
`
`
`DATA BUSS
`
`
`
`
`Apple Inc. v. Rembrandt-Wireless Technologies, LP, IPR2020-00034
`Page 13 of 36
`
`Ex. 2020
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`
`

`

`COLLECT FIRST 31
`LOWER NIBBLE=16
`
`
`
`316
`
`
`
`
`HAS
`
`"Al" BEEN
`YES
`
`DETECTED?
`
`
`314
`
`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 13 of 23
`
`5,168,493
`
`BLOCK SYNCHRONIZATION
`AND PHASE SELECT ROUTINE
`
`LOAD SYNC TIMER LATCH
`UPPER NIBBLE=8
`LOWER NIBBLE=8
`OD
`ENABLE BIT SYNC
`
`304
`WAIT FOR FIRST
`POSITIVE DATA
`TRANSITION
`
`LOAD SYNC TIMER. LATCH
`UPPER NIBBLE=8
`
`308
`
`‘DATA SAMPLES
`
`310
`
`SYNC 1 SEARCH
`TIMER=161
`
`312
`
`TAKE A DATA SAMPLE
`AND CORRELATE WITH
`"A" WORDS
`
`
`
`
`BAUD RATE=1200
`DELAY FLAG=48 BITS
`
`BAUD RATE=1200
`DELAY FLAG=ZERO BITS
`
`@)
`
`FIG.7A
`
`NO-
`
`Rembrandt Wireless
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 14 of 36
`
`

`

`U.S. Patent
`
`Dec.1, 1992
`
`Sheet 14 of 23
`
`5,168,493
`
`324
`
`322
`
`BAUD RATE= 2400
`DELAY FLAG = 48 BITS
`
`HAS "A2" BEEN
`DETECTED?
`
`
`
`
`
` HAS
`
`BAUD RATE= 2400
`DELAY FLAG = ZEROBITS
`
`326
`
`
`
`
`"INVERTED A2"
`
`BEEN DETECTED?
`
`BAUD RATE = 4800
`DELAYFLAG = 48 BITS
`
`HAS "A3" BEEN
`
`NO
`
`
`DETECTED?
`
`
`
`
`
`
`DOES SYNC1
`
`SEARCH TIMER=
`
`
`FIG. 7B
`
`BAUD RATE= 4800
`DELAY FLAG = ZEROBITS
`
`336
`
`HAS
`"INVERTED A3"
`
`BEEN DETECTED?
`
`
`342
`
`
`
`NO
`
`338
`
`SYNC1 SEARCH TIMER =
`SYNC1 SEARCH TIMER- 1
`
`Rembrandt Wireless
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 15 of 36
`
`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 15 of 23
`
`5,168,493
`
`348
`
`COLLECT 31 BIT DATA
`SAMPLES
`
`354
`352
`
`
`
`LOAD SYNC TIMER LATCH
`
`
`DOES BAUD
`
`UPPER NIBBLE= 8
`RATE = 2400?
`
`
`LOWER NIBBLE= 12
`
`
`
`
`
`
`
`a
`
`or
`
`
`
`
`
`RATE=4800? 7 :
`
`LOWER NIBBLE= 10
`
`—
`
`‘ngaMER TR
`
`,NO
`COLLECT THIRTY SECOND GROUP
`IDENTIFICATION SAMPLE AND DECODE
`
`360
`
`362
`
`GO TO 2400 BAUD SYNC TWO
`
`
`YES
`DOES BAUD
` RATE = 2400?
`
`
`SEARCH SUBROUTINE
`
`364
`
`
`DOES BAUD
`RATE = 4800?
`
`GO TO 4800 BAUD SYNC TWO
`SEARCH SUBROUTINE
`
`368
`
`
`
`
`
`
`GO TO 1200 BAUD SYNC TWO
`SEARCH SUBROUTINE
`
`DEINTERLEAVE AND
`BLOCK DECODE
`
`FIG. 7C
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 16 of 36
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`Rembrandt Wireless
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`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 16 of 23
`
`5,168,493
`
`372
`
`374
`
`LOAD SYNC TIMER LATCH
`UPPER NIBBLE= 8
`LOWER NIBBLE = 16
`
`~
`
`375
`
`376
`
`ENABLE SYNC2
`CORRELATOR
`
`APPLICABLE FRAME
`
`DOES
`SYNC2 SEARCH TIMER
`
`
`
`
`
`
` AWAIT NEXT
`
`
`
`SYNC2 SEARCH TIMER=48
`
`
`
`
`377
`
`WAIT FOR SAMPLE
`INTERRUPT
`
`
`
`
`
`
`
`HAS
`"C" OR "INVERTED C"
`BEEN DETECTED?
`
`
`
` 382
`
`383
`
`YES
`
`DELAY FOR A COUNT
`OF TWENTY FOUR BITS
`
`384
`
`FIG. 7D
`
`NN
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 17 of 36
`
`Rembrandt Wireless
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`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 17 of 23
`
`5,168,493
`
`2400 BAUD SYNC TWO
`SEARCH SUBROUTINE
`390
`
`364
`
`LOAD SYNC TIMER LATCH
`UPPER NIBBLE = 4
`LOWER NIBBLE = 8
`
`391
`
`SYNC2 SEARCH TIMER=96
`
`392
`
`ENABLE SYNC2
`CORRELATOR
`
`
`
`
` AWAIT NEXT
`APPLICABLE FRAME
`
`
`
`
`
`
` DOES
`SYNC2 SEARCH TIMER
`
`
`
`WAIT FOR SAMPLE
`INTERRUPT
`
`396
`
`SYNC2 SEARCH TIMER=
`SYNC2 SEARCH TIMER - 1
`
`HAS
`"C" OR “INVERTEDC"
`BEEN DETECTED?
`
`
`
`
`
`398
`
`399
`
`
`
`
`
`
`YES
`
`HAS
`"C" BEEN
`
`YES
`
`DELAY FOR A COUNT
`
`DETECTED? -OFFORTYEIGHTBITS
`
`402
`
`E/TW
`NO
`WAIT FOR ONE
`IstHAASEQNETWO
`SAMPLE INTERRUPT
`YESa—
`
`
`400
`
`.
`
`403
`
`‘LOAD TIMER LATCH
`UPPER NIBBLE = 4
`LOWER NIBBLE = 16
`
`404
`
`FIG: 7E
`
`RETURN
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 18 of 36
`
`Rembrandt Wireless
`
`

`

`U.S. Patent
`
`Dec. 1, 1992
`
`Sheet 18 of 23
`
`5,168,493
`
`4800 BAUD SYNC TWO
`SEARCH SUBROUTINE
`
`368
`
`427
`
`AWAIT NEXT
`APPLICABLE FRAME
`
`
`
`
`
`
`
`
`DOES
`SYNC2 SEARCH TIMER
`
`420
`
`LOAD SYNC TIMER LATCH
`UPPER NIBBLE= 2
`LOWER NIBBLE = 4
`
`421
`
`SYNC2 SEARCH TIMER=192
`
`422
`
`ENABLE SYNC2
`CORRELATOR
`
`WAIT FOR SAMPLE
`INTERRUPT
`
`SYNC2 SEARCH TIMER=
`SYNC2 SEARCH TIMER - 4
`
`
`HAS
`"C" OR "INVERTED C”"
`BEEN DETECTED?
`
`428
`
`429
`
`
`
`
`
`DETECTED? ce OF92BITS
`
`
`HAS
`
`YES YES,IDELAY FOR A COUNT"C" BEEN
`
`
`
`NO
`
`
`IS
`PHASE ONE
`TO BE
`DECODED?
`
`
` 498
`
`
`WAIT FOR ONE
`WAIT FOR TWO
`LOAD SYNC TIMER LATCH|[SAMPLE INTERRUPTE|capLe INTERRUPTS
`UPPER NIBBLE = 2
`LOWER NIBBLE = 16
`
`
`FIG. 7F
`
`
`
`SAMPLE INTERRUPTS
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 19 of 36
`
`Rembrandt Wireless
`
`

`

`DATA~| | | PLE LE LI LILI
`
`CLOCK
`
`-455
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`|
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`16Xcrock UUUUUUUUUUUUUY—60
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`DATA J
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`
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`
`{
`
`[
`
`]
`
`<
`
`=
`
`FIG.8A
`
`€6r'S9T's
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 20 of 36
`
`Rembrandt Wireless
`
`

`

`—455’
`
`—460’
`
`~465"
`
`—470’
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`Z661‘E‘99dqusjeg*S'N
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`
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`
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`
`SAMPLE
`
`CLOCK
`
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`
`|
`
`|
`
`#LIG.SB
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 21 of 36
`
`Rembrandt Wireless
`
`

`

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`Rembrandt Wireless
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 22 of 36
`
`

`

`LAST BITS OF C 2400 BAUD
`
`480
`
`DATA BLOCK START 2400 BAUD
`
`|
`PHASE 1/2
`
`PHASE_3/4
`
`PHASE_1
`
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`2x Monon no non on nn pr-*
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`CLOCK
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`
`6
`
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`
`FITIG.IB
`
`€TJOZZ3004S
`
`C6P‘s9T‘S
`
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 23 of 36
`
`Rembrandt Wireless
`
`

`

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`Rembrandt Wireless
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 24 of 36
`
`

`

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`Rembrandt Wireless
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 25 of 36
`
`

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`
`Rembrandt Wireless
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 26 of 36
`
`

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`Rembrandt Wireless
`Ex. 2020
`Apple Inc. v. Rembrandt Wireless Technologies, LP, IPR2020-00034
`Page 27 of 36
`
`