(12) United States Patent
`Sabat, Jr. et al.
`
`USOO6349200B1
`US 6,349,200 B1
`(10) Patent No.:
`Feb. 19, 2002
`(45) Date of Patent:
`
`(54)
`
`(75)
`
`(73)
`(*)
`
`(21)
`(22)
`
`(63)
`
`(51)
`(52)
`
`(58)
`
`(56)
`
`MONITORING AND COMMAND SYSTEM
`FORTRANSCEIVERS USED TO INTER
`CONNECT WIRELESS TELEPHONES TO A
`BROADBAND NETWORK
`
`Inventors: John Sabat, Jr., Merrimack, NH (US);
`Timothy R. Locascio, Osterville, MA
`(US); Clifford M. Lo Verme; Glenn T.
`Flebotte, both of Merrimack, NH (US)
`Assignee: Transcept, Inc., Manchester, NH (US)
`Notice:
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`Appl. No.: 09/346,590
`Filed:
`Jul. 2, 1999
`Related U.S. Application Data
`
`Continuation of application No. 08/998.878, filed on Dec.
`24, 1997.
`Int. Cl........................... H04O7/20, H04M 11/00
`U.S. Cl. ....................... 455/403; 455/420; 455/507;
`455/525; 455/422; 455/88; 455/9; 370/338;
`370/349
`Field of Search ................................. 455/525, 524,
`455/500, 422, 507, 9,403, 3.03, 88; 370/338,
`339,349; 348/12, 14
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`4/1986 Ozeki et al. .................. 370/85
`4,584,678 A
`5/1986 Nelson et al. ................ 370/88
`4,587,651 A
`4,593,155 A * 6/1986 Hawkins .......
`... 179/2
`5,067,147 A 11/1991 Lee ............................. 379/60
`5,305,467 A 4/1994. Herndon et al.
`5,381,459 A
`1/1995 Lappington
`5,550,898 A 8/1996 Abbasi et al.
`5,802,173 A 9/1998 Hamilton-Piercy et al.
`5,805,983 A 9/1998 Naidu et al.
`
`Hamilton-Piercy et al.
`5,809,395 A
`9/1998
`5,881,059 A
`Deschaine et al.
`3/1999
`5,898,683 A 4/1999 Matsumoto et al.
`6,122,529 A * 9/2000 Sabat, Jr. et al. ........... 455/561
`6,192.216 B1 * 2/2001 Sabat, Jr. et al. ...
`... 455/5.1
`6,223,021 B1 * 4/2001 Sylvia et al. ................. 455/77
`* cited by examiner
`
`Primary Examiner William Trost
`ASSistant Examiner Marleen Milord
`(74) Attorney, Agent, or Firm-Kirkpatrick & Lockhart
`LLP
`ABSTRACT
`(57)
`A monitoring and command System for use in a wireleSS
`communications System including remotely located trans
`ceivers for transmitting and receiving telephony Signals to
`and from wireleSS telephones wherein each of the remote
`transceiverS is connected to a broadband distribution net
`work. A central location includes remote antenna Signal
`processors connected to the broadband distribution network
`and a control unit is connected to the remote antenna Signal
`processor, and the monitoring and command System controls
`operations of the remote antenna Signal processors and the
`remote transceivers. The control unit exchanges control and
`monitoring messages with the remote antenna Signal
`processors, and each exchange of messages comprises a
`completed exchange of messages with one remote antenna
`Signal processor before initiation of an exchange of mes
`Sages with another remote antenna Signal processor. Each
`remote antenna Signal processor exchanges control and
`monitoring messages with the remote transceivers associ
`ated there with, and the messages to all associated remote
`transceivers are interspersed. Each control and monitoring
`message includes a message number field identifying the
`meaning of the message, a unique message tag field used by
`the remote antenna Signal processors to identify each remote
`transceivers, and a plurality of data fields containing mes
`Sage information wherein the contents of each data field are
`defined by the contents of the message number field.
`
`4 Claims, 13 Drawing Sheets
`
`Transceiver
`Station
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`Telephone
`System
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`
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`Wireless
`Telephone
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`f 19
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`

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`U.S. Patent
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`US 6,349,200 B1
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`U.S. Patent
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`Feb. 19, 2002
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`Sheet 1 of 13
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`US 6,349,200 B1
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`Mie
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`118g
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`FIG. 1
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`System
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`Telephone
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`Page 2
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`CommScope Ex. 1031
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`

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`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 2 of 13
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`US 6,349,200 B1
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`Figure 4
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`RAD 218
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`312. To Other RADS, RASP and Cable Network
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`_
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`Page 3
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`CommScope Ex. 1031
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`

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`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 3 of 13
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`US 6,349,200 B1
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`210
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`Page 4
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`CommScope Ex. 1031
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`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 4 of 13
`
`US 6,349,200 B1
`
`462a
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`Page 5
`
`CommScope Ex. 1031
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`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 5 of 13
`
`US 6,349,200 B1
`
`als,
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`
`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 5 of 13
`
`US 6,349,200 B1
`
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`Page 6
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`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 6 of 13
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`US 6,349,200 B1
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`
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`G99 36esseW|×
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`
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`699699699699699 `~ 699699 < 699 ~ 699
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`
`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 6 of 13
`
`US 6,349,200 B1
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`
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`U.S. Patent
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`Feb. 19, 2002
`
`Sheet 7 of 13
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`US 6,349,200 B1
`
`Usage
`MSG DEC Message Name
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`MSGFAL
`ALARMSTATUS REQUESTMSG IS
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`HICSETCALMSG
`14
`HS, ATP T 14
`CMCODEDMSG
`15
`CMSEDMSG T ATP TT 14
`16
`CMSETCALMSG
`ATP
`15
`17
`HICREPORTALARMMSG
`IS
`16
`18
`HC COMMSTATMSG
`S
`17
`19
`THICATENUATIONSTATMSG S, ATP
`7
`20
`HCFREQUENCY STATMSG
`S, ATP
`8
`21
`HICMISC STATMSG
`S, ATP
`19
`23
`HICREADCALMSG
`ATP
`19
`25
`THICVERNUMMSG
`S. ATP
`20
`26
`CMCOMMSTATMSG
`IS
`20
`27
`TCMATSTATMSG. T.
`S. ATP
`21
`28
`CMLREPORTALARMMSG
`IS
`22
`29
`CMFREO STATMSG
`S. ATP
`24
`30
`CMPOWER STATMSG
`S, ATP T 24
`3
`CMMSC STATMSG
`S. ATP
`25
`32
`CMREADCALMSG
`ATP
`33
`CMREADTDMSG
`ATP
`26
`34
`CMREADVERMSG
`TS, ATP
`26
`35
`THIC TUNEPLMSG
`S
`27
`36
`Hic POKE MEMMSG
`TD
`27
`37
`HICPEEK MEMMSG
`TD
`27
`38
`HCCOPY TOEEPROMMSG
`TD
`27
`39
`CMTUNEPLLMSG
`TD
`28
`40
`CMPOKEMEMMSG
`TD
`28
`41
`CMPEEK MEMMSG
`TD
`29
`42
`CMREADNDMSG
`TD
`29
`43
`WINKHCMSG
`TD
`29
`T44
`HICUPSTREAMTONE POWER TD
`30
`45
`HICFLASHDATWRMSG
`TD
`30
`46
`THICFLASHDATRDMSG
`HD TT 30
`47
`HICFLASHUNLOCMSG
`TD
`31
`48
`THCCAL MODEMSG
`Not used
`32
`49
`HICREBOOTMSG
`ATP
`33
`50
`HCMSG DUMPMSG
`TD
`33
`51
`CMUSSETPOINTMSG
`s
`33
`52
`Usage Legend:
`S is
`Required for nomal System operation
`ATP = Required by Automated Test Procedure, Hardware Qualification
`FI G 7A TD = Test and Debug Use only
`
`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 8 of 13
`
`US 6,349,200 B1
`
`Message
`
`MSGFAIL
`
`This message is a RESPONSE only. If a message failed
`to be processed by the receiving device, this RESPONSE
`will be returned.
`
`(70) T(0-255)
`Msg Tag T Tag number
`RESPONSE *
`DF
`error type
`(70)
`- Poll Neuron Timeout
`2- BPSKOernodulator TimeOut
`3- Multiple Message Error (DF #2-10 indicate the CMls
`in which errors were reported
`H
`If DF # 1 s 3
`
`
`
`
`
`7 O 77 OO 7 O
`
`7 O
`
`Z
`
`
`
`Alpha CM, (24-17) Bit-mapped
`
`Gamma CMI, (8-1) Bit-mapped
`Gamma CMI, (16-9) Bit-mapped
`Ganna CM, (24-17) Bit-mapped
`
`
`
`
`
`
`
`
`
`
`
`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 9 of 13
`
`US 6,349,200 B1
`
`Message
`
`ADD HCMSG
`
`This message is used at installation, and to change the
`HIC's State and Channel parameters.
`
`Tag number
`rREQUEST r
`thic state
`
`DF
`
`DF #2
`
`DF # 4
`DF #5
`DF 6
`DF y 7
`DFB
`
`alpha Upstr pri frec
`alpha upstrciv frec
`beta upstrpril freq
`beta upstr div fred
`CO
`-
`gamma upstr div freq
`
`DCs tox chan
`Korean FAs
`indicator
`
`
`
`(7-0) T(0-255)
`(0)
`OsOffline, 1s0nline
`(1)
`Downstream power: 0=off 1son
`Reference tone: 0=off, 1on
`(2)
`Control tone; Oloff 1son
`(3)
`CM. DataBase: O=leave alone | 1=clear
`(4)
`Power up state. Ofrom defaults | 1=from last state
`(5)
`(7:6). Channel Type: O-STD, 1-HRC, 2=RC
`(7:0)
`(70)
`Alpha Upstrean Diversity Freq: (see notes below
`(70)
`
`Gamma Upstream Primary Freq: (see notes below
`7:0)
`(70) Gamma Upstream Diversity Freq (see notes below)
`(70) Downstream Channel (70-120)
`OTO
`(75) USA Channel indicator (000)
`(4:0). PCS Channel MSB (0-1) (see notes below)
`
`Korean FA indicator (OO1
`(4:0) unused (send zeroes)
`(70) Korean FA (1-21) (see notes below
`
`
`
`
`
`
`
`
`
`
`
`Notes:
`When any of the Frequency and Channel parameters are changed, the appropriate values of any attached CMls will automatically be changed, i.e.
`an ACT CMI MSG with changed data is sent to each attached CMI,
`Upstream CATV Frequency:
`5 to 42 MHz in 250 kHz steps, (i.e. for desired upstream freqof 23.5 MHz (23.5 MHz 1250MHz) = 94), maintain at least 2 MHz between
`all sectors and channels, Diversity channel 2 MHz min. above its corresponding Primary channel.
`United States PCS Channel:
`Band A: Channels 25 to 275, Tx freqs (PCS Chan x 0.5 MHz) + 1930 MHz, Rx Freq is 80 MHz below. (i.e. for PCS channel 275 set
`DFH9 to 1 (256) and DFF10 to 19)
`Korean PCS FA:
`+ 1840 MHz, Rx Freq is 90 MHz below.
`Band A. FAS 1 to 7, Tx freq = (PCS FA x 1.25MHz)
`Band B: FAs 8 to 14, Tx freq = ((PCS FA - 7 x 1.25MHz) + 1850 MHz, Rx Freq is 90 MHz below.
`Band C: FAS 15 to 21, Tx freq = ((PCS FA - 14) x 1.25MHz) + 1860 MHz, Rx Freq is 90 MHz below.
`Other Countries' PCS channel allocations can be added by assigning DF #9 bits 7:5. Six possibilities remain (010 - 111)
`
`FIG.7C
`
`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 10 of 13
`
`US 6,349,200 B1
`
`Message
`
`HICDSOUTPUT POWERMSG
`
`This message is to set up the HC's downstream
`attenuators and power Control.
`
`Msg Tag
`DFN 1
`
`Tag number
`r REquest r
`Thic state
`
`(70) (0-255)
`(0)
`0 = Offline | 1 = Online
`(1)
`Downstream power: 0=off 1son
`T(2) Reference tone: Oof 11 on T
`(3)
`Control tone: Oof 11 on
`(4)
`. CM DataBase: Osleave alone sclear
`(5)
`Power up state O-from defaults 11-from last state
`(76) Channel Type: O-STD, 1=HRC, 2=RC
`(O)
`DS Atten: Os don't change | 1 change
`(1)
`Ref/Cnt Atten: Os don't change 1s change
`(70) Downstream attenuator (0-44) 2 dB steps
`(70) Ret/Ctrl attenuator (0-44)2 dB steps
`
`DF # 2
`save to flash
`DF 3
`dinstrattvalue
`DF 4
`rectritone
`FIG. 7D
`
`Message
`
`HIC US POWERCTLMSG
`
`This message is to set up the HIC's upstream
`attenuators and power control.
`
`Msg Tag
`DF # 1
`DF # 2
`DF # 3
`DF # 4
`DF 6
`
`Tag number
`rREQUESTr
`save to flash
`upstralpha at
`upstretaat
`upstrgammaat
`not used
`not used
`
`(0-255)
`(7:0)
`Os don't change 1 = change (saves DF#2-#8)
`(O)
`(70) fixed value (0-44)2 dB steps
`(70) fixed value (0-44)2 dB steps
`(70) fixed value (0-44)2 dB steps
`(70) formerly US AGC Beta setpoint
`ingress threshold fixed value (1-10) 0.5 dB steps
`
`
`
`FIG. 7E
`
`
`
`
`
`
`
`
`
`
`
`
`
`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 11 of 13
`
`US 6,349,200 B1
`
`Message ADDCMMSG
`
`
`
`Taq
`
`Tao number
`areer REQUEST rare
`
`NID5
`NID4
`NID3
`NID2
`NID
`TNIDO
`T state
`
`DF 1
`DF # 2
`DF # 4
`DF 5
`DF # 6
`DF #7
`DF # 8
`
`D F 9
`
`DF # 10
`
`ping/gain
`
`This message is sent to the HTC at installation of a CMI.
`The Neuron D is loaded into the CM data base within the
`HIC. If Ping is set (DF#10 MSB) the HiC then builds and
`sends an ACT CMMSG to the CMl.
`
`(70) (0-255)
`
`Sector Number. O=Alpha, 1=Beta, 2=Gamma
`CMI Number: (O-23
`
`(
`:
`(7:
`(7:
`7 O
`(7-0) Neuron ID
`O
`T (7-0) Neuron DSW
`Active
`(O)
`O. Not active I
`(1)
`Auto stats: O = off 1s on
`(2)
`Dwnstm autogain: 0 = off 1s on
`(3)
`Power up state; O from defaults || 1s from last state
`(4) . CMI alarms: O leave alone 1 - clear
`(5)
`Upstm autogain; O = off 1 = on
`(O)
`(1)
`t
`Diversity Receive: O = of 71 on
`(2)
`(6:0) Dwnstm AGC Setpoint (HIC input to CM output)
`(7)
`Ping CM; O = yes | 1= no
`
`
`
`
`
`
`
`
`
`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 12 of 13
`
`US 6,349,200 B1
`
`Message
`
`ACT CMMSG
`
`
`
`This message is used at installation and to change the
`CMI State, CATV and PCS frequencies, Tx state and CM
`Cain.
`
`
`
`
`
`E. "
`Tag number
`gTag
`(70) T(0-255)
`T
`Tire REQUEST or
`Sector Number. Os Alpha, 1=Beta, 2=Gamma
`of
`Sector/cminum
`4:O) CM Number O-23
`O. Not active | 1= Active O
`(O)
`DF # 2
`state
`(1)
`Auto stats: 0 = of 1 on
`
`T (2) Dwnstn autogain: O of
`on L
`(3)
`Power up state; O =from defaults / E from last state
`(4) . CMI alans: 0 = leave alone / 1 = clear
`(5)
`Upstm autogain: Oe of 71 son
`T (7:O) Upstream Diversity Fred: (see notes below)
`(70) Downstream Channel 70 to 120 (see notes below)
`Downstream Channel Type: O = STD, 1 s HRC, 2=tRC
`See rotes below
`T (75) US Channel indicator (000)
`(4:0). PCS Channel MSB (0) (see notes below)
`(70). PCS Channel LSB (0-255) (see notes below
`(75) Korean FA indicator (001)
`(40) unused (send zeroes)
`Korean FA (1-21) (see notes below
`(0) IPA: Oe of 1 on O
`(1)
`Primary Receive Oe of 1s on
`(2)
`Diversity Receive: O = of is on
`(60) Dwnstm AGC Setpoint (HIC input to CMI output
`
`
`
`
`
`DF 4
`DF 5
`DF 6
`
`DF 7
`DF 8
`DF 7
`
`Tupdiv freq
`dn chn
`
`US Channels
`indicator
`pcs
`chan
`pcs.txchan
`TKorean FAs
`indicator
`
`DF #9
`
`to state
`
`gain
`
`DF # 10
`Note:
`if a CMI is attached to a HIC, it is then necessary to match all the Frequency and Channel parameters to the current
`values of the HIC.
`Upstream CATV Frequency:
`5 to 42 MHz in 250 kHz steps, (i.e. for desired upstream freq of 23.5 MHz (23.5 MHz 1250MHz) is 94) Diversity channel 2 MHz min,
`above its corresponding Primary channel,
`PCS Channel:
`Band A: Channels 25 to 275, Tx freq = (PCS Chanx.05 MHz) + 1930 MHz, Rx Freq is 80 MHz below. (i.e. for PCS channel 275 set
`DF9 to 1 (256) and DF 10 to 19)
`Korean PCS FA:
`- 1840 MHz, Rx Freq is 90 MHz below.
`Band A: FAs 1 to 7, Tx freqs (PCS FA x 1.25MHz)
`Band B: FAs 8 to 14, Tx freqs (PCS FA - 7) x 125MHz) + 1850 MHz, Rx Freq is 90 MHz below.
`Band C: FAs 15 to 21, Tx freqs (PCS FA - 14)x 1.25MHz) + 1860 MHz, Rx Freq is 90 MHz below.
`
`FIG.7G
`
`

`

`U.S. Patent
`
`Feb. 19, 2002
`
`Sheet 13 of 13
`
`US 6,349,200 B1
`
`Message CMHCGAINMSG
`
`K
`
`to Tag number
`
`DFA 2
`DF #3
`DF 4
`
`time
`freq
`freq
`
`
`
`
`
`Tr CMI to HICr
`tonepwr
`DF # 2
`uppwr
`DF3
`pricaiac
`DF #4
`divical fac
`DF 5
`DF #6 Tuppriat
`DF #8
`upcomat
`
`This message is used by the HIC for the auto gain
`function. The message data is different from HIC to
`CMI, than it is from CMI to HIC.
`
`(70)
`7 O
`
`(0-255)
`
`
`
`EAAEGEE."
`
`
`
`
`
`
`
`
`
`Tag number
`rHC to CMr
`TT 1-Tel CMI to calculate average power amp value
`23 Turn Gain Tones on
`4 a set the US and DS attenuators
`PA and RCvrs, Tune PCS channel and save it to flash.
`Gaintime (enum = 1)
`(70)
`Gain tone Fred MSB (enum = 2 or 3, see notes below)
`(70)
`(70). Gain tone FreqLSB (enume 2 or 3, see notes below)
`(7:0)
`Sector Number O=Alpha, 1 =Beta, 2=Gamma
`CMNumber 0-23
`T (70)
`Upstream Primary Attenuation (enume 45)
`uppratt
`DF # 6
`(7:0)
`Upstream Diversity Attenuation (enum = 4.5)
`updiv at
`DF #7
`(7-0)
`Upstream Combined Attenuation (enume 45)
`upcomat
`DF # 8
`IT- -
`T (70)
`Downstream Atenuation pre SAW (enum=4)
`dnpreat
`DF 9
`Downstream Attenuation post SAW (enum = 4
`-- T -
`DF 4
`freq
`(70 PCS Channel LSB (enum = 5)
`DF 9
`to state (see note below)
`(O)
`PA; 0 of 7
`on (enum = 5)
`()
`Primary Receive: Ooff on enum = 5)
`(2)
`Diversity Receive: Os of 1 = on (enum = 5
`I enum=0,2345 (see note below)
`Gain Tone power
`(70)
`(7:0. Upstrean power
`(70)
`Primary call factor
`(70)
`Diversity calfactor
`(70)
`Upstream Primary Attenuation
`(70)
`Upstream Combined Attenuation
`
`
`
`Notes:
`Gain tone frequency (enum as 2 or 3)
`GainFreq = (intPCS Chan 13)x3).7; i.e. If PCS Channel equals 100, then (int100 13)x3) - 7 = 92
`Puts the gain tones at approx. 350 to 450 kHz above the center of the upstream CATV pedestals.
`For enums.1 & 5, CMI echoes back the HEC to CMI message data.
`For enums5, DF9 affects PA and Receivers, but to state is NOTCHANGED to reflect what this message has done. This is part of again tone
`calibration procedure that is not used.
`
`FIG.7H
`
`

`

`1
`MONITORING AND COMMAND SYSTEM
`FORTRANSCEIVERS USED TO INTER
`CONNECT WIRELESS TELEPHONES TO A
`BROADBAND NETWORK
`
`RELATED APPLICATIONS
`This is a continuation of U.S. patent application Ser. No.
`08/998,878 filed Dec. 24, 1997.
`FIELD OF THE INVENTION
`The present invention relates to wireleSS communications
`Systems, and more particularly to a monitoring and com
`mand System for transceivers that carry telephony Signals
`between wireless telephones and a broadband distribution
`network.
`
`15
`
`BACKGROUND OF THE INVENTION
`The prior art teaches the use of existing cable television
`network cables to carry telephony Signals between a tele
`phone network and remote transceiver Sites in defined cells
`or Sectors. The remote transceivers are used to establish
`wireleSS telephony communication links with wireleSS tele
`phones that are operating within an area covered by each
`remote transceiver. To increase the number of wireleSS
`telephone Subscribers that can use the wireleSS telephone
`System it has been Suggested to decrease the size and
`operational range of each cell or Sector, and to increase the
`number of cells or Sectors required to provide wireleSS
`telephone Service to a given area. Having cells or Sectors of
`decreased size permits greater reuse of the limited number of
`frequency channels allocated for wireleSS telephone Service
`because other cells or Sectors located at a closer range can
`reuse the Same frequency channels for additional calls
`without Signal interference. The advantages of reducing cell
`or Sector Size to increase the call carrying capacity of the
`wireless telephone network is offset by the requirement for
`additional remote transceivers for the additional cells. This
`offset is minimized by utilizing an existing broadband
`distribution network to provide the communications path
`between remote transceivers in each of the cells or Sectors
`and a central transceiver. The central transceiver acts as the
`interface with the remote transceivers, via the broadband
`distribution network, and a base transceiver Station acts as
`the interface between the telephone network and the central
`transceivers.
`To carry wireleSS telephony Signals over a broadband
`distribution network, as described above, a predetermined
`bandwidth on the network is typically allocated for this
`purpose. However, as required, more bandwidth may be
`allocated to carry wireleSS telephony Signals. To most effi
`ciently use a given bandwidth to carry wireleSS telephony
`Signals between wireleSS telephones and the telephone
`network, a combination of frequency and time division
`multiplexing, and other forms of Signal multiplexing, is
`utilized. This requires base transceiver Station equipment
`that acts as the interface with the telephone network and the
`wireless telephone system. With the base transceiver station
`equipment is a central transceiver (RASP), also called a
`Headend Interface Converter (HIC), that interfaces with the
`broadband distribution network, and it must function with
`telephony Signals in the wide frequency Spectrum of radio
`frequency Signals on the telephone network, and up to 1000
`Mhz over the broadband distribution network. This system
`also requires a plurality of remote transceivers, also called
`cable microcell integrators (CMI) or Remote Antenna Driv
`ers (RADs), in each of the cells or Sectors that can carry
`
`25
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`US 6,349,200 B1
`
`2
`many channels of telephony Signals between the wireleSS
`telephones and the central transceiver via the broadband
`distribution network, without creating Signal interference
`with the telephony Signals in adjacent cells or Sectors. In
`addition, the remote transceivers (RADs) must function with
`and translate telephony Signals in the wide frequency Spec
`trums of up to 1000 Mhz on the broadband distribution
`network and between 1850-1990 MHZ for the radio link
`between remote transceivers and wireleSS telephones. To
`function together properly in Such a System wireleSS tele
`phone System there is a need for efficient operational com
`munication between the central transceiver and remote
`transceivers.
`
`SUMMARY OF THE INVENTION
`Thus, there is a need in the art for means to monitor and
`control the operations of the central transceiver and remote
`transceivers. In this respect, a recurring problem of the prior
`art is the creation of a flexible and reliable means for
`encoding data and commands to be received from and
`transmitted to the remote transceivers, for receiving infor
`mation from the remote transceivers, for monitoring the
`operation of the transceivers, and for Sending commands to
`the remote transceivers to control their operation. It is
`necessary for the encoding means to convey data and
`commands in as flexible and compact a form as possible to
`preserve communications bandwidth and thereby to allow a
`large number of remote transceivers to be monitored and
`controlled from each base Station, and it is preferable that the
`encoding allow a flexible a network configuration as pos
`sible.
`The present invention is directed to a monitoring and
`command System for use in a wireleSS communications
`System including at least one central transceiver and a
`plurality of remote transceivers used for transmitting and
`receiving telephony Signals to and from wireleSS telephones.
`According to the present invention, each of the remote
`transceivers (RADs) are connected to a broadband distribu
`tion network that carries telephony Signals between the
`remote transceivers (RADS) and the central transceiver
`(RASP). The central transceiver includes at least one remote
`antenna Signal processor (RASP) connected to the broad
`band distribution network and a control unit connected to the
`at least one remote antenna Signal processor, and the moni
`toring and command System controls operations of the
`remote antenna Signal processor and the remote transceivers.
`The monitoring and command System includes the control
`unit, which exchanges messages with each of the remote
`antenna Signal processors for controlling operations of the
`remote antenna Signal processors, including monitoring the
`operation of the antenna Signal processors and the central
`and remote transceivers, and controlling Signal levels and
`frequencies of the telephony Signals. Each exchange of
`messages between the control unit and a remote antenna
`Signal processor comprises a completed exchange of mes
`Sages between the control unit and the remote antenna Signal
`processor before initiation of an exchange of messages
`between the control unit and a next remote antenna Signal
`processor.
`The monitoring and command System further includes the
`at least one antenna Signal processor, which exchanges
`messages with the remote transceivers for controlling opera
`tions of each of the remote transceivers, including monitor
`ing operations of each of the remote transceivers, relaying
`messages between the control unit and each one of the
`remote transceivers, and controlling the Signal levels and
`
`

`

`3
`frequencies of the telephony Signals. The messages of an
`eXchange of messages between the at least one remote
`antenna Signal processor and a Selected one of the remote
`transceivers are interspersed with the messages of an
`eXchange of messages between the at least one remote
`antenna Signal processor and at least one other of the remote
`transceivers.
`The messageS eXchanged among the control unit, the
`remote Signal Signal processors and the central and remote
`transceivers includes a message number field containing a
`value identifying the meaning of the message, a message tag
`field containing a value identifying a given message in a
`Sequence of messages, wherein the message tag field is used
`in an exchange of messages between a remote antenna Signal
`processor and a remote transceiver, and a plurality of data
`fields containing message information wherein the contents
`of each data field are defined by the contents of the message
`number field. The data fields contain information including
`an identification of a remote transceiver intended as a
`recipient of a message, information determining the operat
`ing parameters of the remote transceivers, and information
`pertaining to the Status and operation of the remote trans
`ceivers.
`
`15
`
`DESCRIPTION OF THE DRAWINGS
`The invention will be better understood upon reading the
`following Detailed Description in conjunction with the
`drawings in which:
`FIG. 1 is a block diagram of a wireleSS telephony System
`integrated with a broadband distribution network;
`FIG. 2 is a simplified block diagram of a remote trans
`ceiver used with the wireless telephony System, and having
`a microprocessor that communicates with a central trans
`ceiver via a broadband distribution network to carry tele
`phony Signals and control Signals between the wireleSS
`telephones and the central transceiver;
`FIG. 3 is a detailed block diagram of the portion of the
`remote transceiver that transmits to wireleSS telephones,
`wireleSS telephony Signals received via a broadband distri
`bution network from the central transceiver, base transceiver
`Station, and telephone network;
`FIG. 4 is a detailed block diagram of the portion of the
`remote transceiver that receives telephony Signals from
`wireless telephones and forwards them via the broadband
`distribution network to the central transceiver, base trans
`ceiver Station, and telephone network,
`FIG. 5 is a block diagram of a typical network showing a
`base transceiver Station and a plurality of remote antenna
`Signal processors (RASPs), each of which is associated with
`one of a plurality of remote antenna drivers (RADs),
`wherein the base transceiver Station includes a head end
`control unit and monitoring/command communications are
`through network communications Encoder/Transceiver
`(E/T)s;
`FIG. 6 is a diagrammatic illustration of a message format
`used for encoding commands and monitored data according
`to the present invention; and
`FIGS. 7A through 7H are illustrations of messages used
`by the communication and control encoding System of the
`present invention.
`DETAILED DESCRIPTION
`In the drawing and the following detailed description all
`elements are assigned three digit reference numbers. The
`first digit of each reference number indicates in which figure
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`25
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`35
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`40
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`45
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`50
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`55
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`60
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`65
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`US 6,349,200 B1
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`4
`of the drawing an element is located. The Second and third
`digits of each reference number indicate Specific elements.
`If the same element appears in more than one figure of the
`drawing, the Second and third digits remain the same and
`only the first digit changes to indicate the figure of the
`drawing in which the element is located. AS used herein the
`term “telephony Signals' includes voice, data, fax and any
`other types of Signals that are Sent over a telephone network
`now or in the future. Throughout the Figures and the
`following description, reference is made, for one example, to
`a combined band pass filter and amplifier 325a. There are a
`number of other Such combined band pass filters and ampli
`fiers. They are shown and referenced this way for ease of
`presentation only. In reality they are each a discrete, Separate
`filter the output of which is input to an amplifier.
`In FIG. 1 is shown a simple block diagram of an exem
`plary broadband distribution network 112 integrated with a
`wireleSS telephone System which include a plurality of
`remote transceivers known as Remote Antenna Drivers
`(RAD) 118 a-i, a central transceiver known as Remote
`Antenna Signal Processor (RASP) 117, and a Base Trans
`ceiver Station (BTS) 115. There are different types of
`broadband distribution networks in use. Such networks may
`utilize coaxial cable, fiber optic cable, microwave links, and
`a combination of these. In the embodiment of the invention
`disclosed herein a conventional hybrid fiber coaxial (HFC)
`cable television Signal distribution System is utilized. Elec
`trical power is distributed along broadband distribution
`network 112 to power line amplifiers (not shown) of the
`cable television distribution network. This electrical power
`Source, or alternate power Sources, are used to provide
`power to RADS 118 a-i.
`Integrated with broadband distribution network 112 is a
`wireleSS telephony System in which the present invention is
`utilized. One Such wireleSS telephony System is taught in
`U.S. patent application Ser. No. 08/695,175, filed Aug 1,
`1996, and entitled “ Apparatus And Method For Distributing
`Wireless Communications Signals To Remote Cellular
`Antennas. The telephony System disclosed herein includes
`a base transceiver station 115 which is connected to a
`telephone system 116. Base tra