`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`I IIIII IIIIIIII Ill lllll lllll lllll lllll lllll lllll lllll lllll llllll llll llll llll
`
`US006442146131
`
`
`(12)United States Patent
`
`Onodera et al.
`
`(10)Patent No.:US 6,442,146 Bl
`
`Aug. 27, 2002
`(45) Date of Patent:
`
`(56)
`(54)TlME-DlVlSlON
`MULTIPLE-ACCESS
`
`COMMUNlCATION SYSTEM
`
`
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`Tetsuo Onodem, Kitakatsushika-gun;
`(75)Inventors:
`A • 9/2000 Kumagai ....................
`
`Hiroshi Usami, Yokohama;
`375/219
`6,125,138
`Akihiro
`
`Bl • 3/2001 Antonio er al ..............
`Tokyo; Eimatsu
`375/346
`6,205,190
`Shibuya,
`Moriyama,
`Koganei;
`
`Kiyoshi Hamagucbi,
`Yokohama;
`Wakayama;
`
`Yoichi Saito,
`Yokosuka;
`
`Tadashi Matsumoto,
`
`Yokohama, all of
`
`Mitsubiko Mizuno,
`WO
`(JP)
`
`96/14719 5/1996
`
`OTHER PUBLICATIONS
`
`FOREIGN PATENT DOCUMENTS
`
`
`
`(List continued on next page.)
`
`(73)Assignees:
`Osaka;
`Sharp Kabushiki Kaisha,
`
`
`Hitachi Ltd.; Mit,;ubishi Oenki
`Ste-ele, et al., '·Third Generation PCN and the lntellignet
`
`
`both of Tokyo;
`
`Kabusbiki Kaisha,
`
`
`
`
`multimode Mobile Portable" Electrooics & Commurucation
`
`Communication Research Laboratory,
`
`
`
`
`Engineering Journal, lnsitiution of Electrical Engineers,
`of Posts and
`Ministry
`
`London, GB, vol. 5, No. 3, Jun. 1, 1993, pp. 147-156.
`Koganei;
`
`Telecommunications, Nippon
`
`Telegraph And Telephone
`
`Corporation; NTT Mobile
`Inc., both
`
`Communications Network,
`of Tokyo; YRP Mobile
`Primary Examiner-Wellington Cbin
`
`
`Telecommunications Key Technology
`
`Assistant Examiner-Brenda Pham
`
`
`Research Laboratories Co. Ltd.,
`
`Yokosuka, all of (JP)
`
`ABSTRACT
`
`(57)
`The present invention is directed to a TOMA communica­
`
`
`
`( •) Notice; Subject to any disclaimer, the term of tbjs
`
`
`
`
`tion system whicb is adapted to different communication
`
`
`
`patent is extended or adjusted under 35
`
`
`
`
`environments or prepares different communication environ­
`
`
`U.S.C. 154(b) by O days.
`
`
`ments and aUows each mobile station to be set for working
`
`
`in any one of the different communication environments.
`
`
`
`The communication system commonly uses a TD MA format
`
`
`that bas a fixed frame-length and a constant number of bits
`
`
`for each of the slots composing the frame. The communi­
`
`
`
`
`cation environments have prepared respecrive sets of com­
`
`
`
`munication conditions, each set including a transmission
`
`9-121321 May 12, 1997 (JP) .............................................
`
`
`power, a modulating method, the number of multiplexed
`
`
`
`
`signals, error-correction, an antenna gain, a frequency bop­
`(51)lot. Cl.7 ................................................
`H04B 7/2U
`
`
`
`
`ping value and a diversity value. At each mobile station and
`
`
`each base station, one of plural sets of communication
`
`(52)U.S. Cl ......................................... 370/347
`
`
`
`
`conditions for respective environments is selected to estab­
`370/321;
`
`lish communication with each other under the selected
`environment.
`
`
`................................. 370/337, 347,
`(58)Field of SL>arch
`
`370/345, 442, 321, 329, 437, 468, 465;
`455/552, 553
`
`(21)Appl. No.: 09/075,249
`
`(22)Filed:May ll, 1998
`
`(30) Foreign
`
`
`
`
`Application Priority Data
`
`
`
`
`
`20 Claims, 5 Drawing Sheets
`
`2
`
`Fr
`
`64
`
`BCCH f R+ r�-( $cl
`PA I uw lc1l 101
`128 64 8 56
`160 -16 ·a···:iT }cONTROLSLOT
`UP/DOWN SCCH [�I PR I lYN I c,I ID
`SC-C-H�F-R�+L.� ... � Sc2
`-��---�I
`8 128 64 8 144 72 16 8 32
`FR+ri·rCO MMUN�ATIONSLOT
`TCH l+R1 uw IC I
`16 8 32
`6 8 48 40
`320
`
`EACH NUMBER DENOTES THE NUMBER OF BITS
`
`Si
`
`Intel, Exhibit 1014
`
`

`

`US 6,442,146 Bl
`
`Page 2
`
`OlliER PUBLICArIONS
`
`Shirato et al., ''A Combining Diversity DFE with Mode
`
`
`
`
`
`switching'', 1996, IEICE society symposium B-463.
`Del Re, el al., "The GSM Procedures in an Jn1egra1ed
`
`
`
`Sampei et al. "An analysis on the performance of variable
`
`
`
`
`
`Cellular a1elli1e Sys1em" IEEE Journal oo Selec1cd Areas
`
`
`
`symbol rate and modula1ioo system", Tccbaical report of
`
`io Communicai1ons, IEEE Joe., New your, vol. 13, No. 2,
`
`
`IEICE. RCS94-64 (1994---09).
`(1995).
`
`
`
`
`Tomisato and Suzuki, "A bigb-spccd digi1al mobile radio
`Suzuki and l-lirade, "Capacity increase of TOMA mobile
`
`
`
`
`
`commuoicatioo system by using muilitraasmillcr signal
`
`
`
`
`communication systems enhanced with interference cancel­
`
`
`
`1ransmissioo", 1995, IEICE socie1y symposium B-386.
`
`
`ling equalizers (ICE)", 1995, IEICE society symposium
`
`
`The ministry of Posts and Telecommunications, ''Final
`B-276.
`
`
`
`report on research and s111dy of an intelligent radio
`*cited by examiner
`
`-wave-utilization", Apr. 1994.
`
`Intel, Exhibit 1014
`
`

`

`[)}
`�
`STATION
`: MOBILE
`SMSC: SATELLITE
`MOBILE SERVICES
`SWITCHING
`CENTRE
`STATION MSC: MOBILE SERVICES SWITCHING
`/J,. : BASE
`CENTRE
`ENVIRONMENTAL
`CONDITIONS
`N A CURRENT AREA AND CURRENT
`� IT ALSO STORES IDENTIFICATION
`NUMBERS OF TERMINALS
`EXISTING
`DATA BASE
`
`§
`
`N
`--..:a
`N
`�
`C
`),,
`
`= �
`�
`�
`�
`""d
`
`
`('.j•
`
`
`rJl•
`
`SMSC #a
`ENVIRONMENT
`OFFICE
`/
`ENVIRONMENT
`COMMUNICATION
`SATELLITE
`
`I 101 I
`
`MSC
`ENVIRONMENT
`COMMUNICATION
`VEHICLE-RUNNIN
`G-SPEED
`
`-
`
`FIG.1
`
`t::i=
`O'I
`�
`1-,.
`N
`�
`
`I-'
`
`O'I
`r:,:i
`e
`
`
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`
`tit
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`
`00 =­�
`
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`
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`
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`
`ENVIRONMENT
`COMMUNICATION
`WALKING-SPEED
`
`Intel, Exhibit 1014
`
`

`

`t::i=
`O'I
`�
`1-,.
`N
`�
`
`I-'
`
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`r:,:i
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`RECEIV .µ ti -ING '\v' '\�
`
`25
`H "--J
`\ ..--
`"
`-Tl ON
`/CORRE C
`DETECTIO N PORTION PORTION PORTION PORTION
`PORTION
`; ERROR-� -NATIN � -ZING COMBINING DETECT ING CONVERT ING
`SIGNAL PORTION DISCRIMGI EQUALI � DIVERSIT Y � RATURE � ... FREQUENCY :: ...
`QUAD-RECEIVED-
`FORMATION DECODING
`CHANNEL
`+
`
`23
`\
`
`22
`"
`
`ADAPT IVE
`
`21
`
`\
`
`-
`
`24
`
`1-I
`
`,
`
`/
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`):
`� CLOCK-PULSE-t 34
`32
`
`' j
`
`PORTION
`
`PORTION
`
`I
`
`1
`
`TRANSMISS ION TRANSMISSION
`
`CONTROL
`
`/
`12
`
`FIG.2
`
`--.
`
`1
`
`.1
`
`PORTION
`SELECT ING
`ESTIMATING AND � CONTROL GENERATING
`ENVIRONMENT
`PORTION
`----�--.
`33 TO RESPECT IVE
`/31
`IL-------+------,
`-TION
`.,.
`/CORREC 14-
`DETECTION PORTION PORTION PORTION
`--�-; ERROR--MODULATING f-+ CONVERTING
`SIGNAL PORTION QUADRATURE -FREQUENCY r-+ -POWER
`FORMATION CODING
`/
`/
`14 -TING '\17
`13
`TRANSM IT JI
`1
`
`CHANNEL
`
`.----'-
`
`
`IN
`
`Intel, Exhibit 1014
`
`

`

`I-'
`t::i=
`
`O'I
`�
`1-,.
`N
`�
`
`O'I
`r:,:i
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`
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`�
`
`
`=­�
`
`00
`
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`--..:a
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`
`= �
`
`�
`�
`�
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`('.j
`
`•
`
`•
`
`THE NUMBER OF BITS
`
`EACH NUMBER DENOTES
`
`8 8 48 40
`TCH HPRI uw IC I
`
`16 8 32
`lcRcH::�::rCOMMUNICA TION SLOT
`
`NUMBERS DENOTE RESPECTIVE
`
`SLOT NUMBERS
`
`Fr
`
`1 I 2
`
`10ms
`
`FIG.3
`
`320
`I
`Si
`8 128 64 8 144 72 16 8 32
`UP/DOWN SCCH [�I
`PR I uw I c1 I ID I sccH lcRcH::� :J-sc2
`8 128 64 8 56 160 16 8 32 } CONTROL SLOT
`oowN BCCH HPR Iuw I c1 I 10 IBCCH lcR+r::�:_J-sc1
`64
`
`Intel, Exhibit 1014
`
`

`

`§
`
`N
`--..:a
`N
`�
`C
`),,
`
`= �
`�
`�
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`
`
`('.j•
`
`
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`
`SERVICE
`
`ANTENNA MODU REQUIRED CARRIERUSER
`
`TRANSMIS
`
`CELL -SION
`
`-MENTSRADIUS POWER GAIN -LATINGCNR BIT RATE RATE
`ENVIRON
`
`t::i=
`O'I
`�
`1-,.
`N
`�
`
`I-'
`
`O'I
`r:,:i
`e
`
`..... tit
`�
`... �
`�
`
`
`=­�
`
`00
`
`FOIR REDUCING CNR
`
`IS ADAPTED AS A TECHNIQUE
`
`EQUALIZATION
`
`NOTE 2 : MUL Tl-CARRIER IS ALSO CONSIDERED
`NOTE 1 : ARRAY COMBINING
`
`ADAPTIVE
`
`16QAM 21dB 768kbps 512kbps (2B+D)X4
`
`16d8/-6dB
`
`1.15km
`
`z
`m
`
`QPSK 10dB 192kbps 128kbps 2B+D
`
`16dB/-OdB
`
`(NOTE 2)
`
`< MACRO
`-i LONG 10km
`
`rm !!Jz
`
`10d8 384kbps 256kbps (2B+D)X2
`
`3km 1.5W 16dB/-6dB QPSK
`
`(NOTE 2)
`
`-Z Os:;
`IO
`<- m::D MACRO
`-< SHORT
`
`INTERFACE
`
`GROUP
`PRIMARY
`
`2.048Mbps
`
`400m aoomw 1 OdB/-6dB QPSK 10dB 3.072Mbps
`
`(WALKING)
`
`-MENT P
`ENVIRON
`
`INTERFACEX2
`
`GROUP
`PRIMARY
`
`4.096Mbps
`
`(OFFICE)
`-MENT 030m 80mW 1 OdB/-6dB 16QAM 29dB 6.144Mbps
`ENVIRON
`
`(PEAK) (BS/MS) METHOD (NOTE 1) RATE
`
`FIG.4
`
`Intel, Exhibit 1014
`
`

`

`U.S. Patent Aug. 27, 2002 Sheet 5 of 5
`
`
`
`US 6,442,146 Bl
`
`FIG.5
`
`PATTERN UW
`· CONTROL SLOT: "1" IS ADDED TO A PN PATTERN OBTAINED BY
`
`THE FOLLOWING PRIMITIVE POLYNOMIALS
`UP X 6 +X+ 1 (INITIAL VALUE : 04octal
`representation)
`DOWN xs+Xs+1 (INITIAL VALUE: 07octal representation)
`
`
`·COMMUNICATION SLOT: 48 BITS SELECTED FROM THE PN PATIERN
`- -- -UW PATTERN -- - -
`I -CH 010010011100010111100101
`
`
`INITIAL VALUE : 12(octal) Q -CH O 1 0 0 0 0 0 11 11 11 01 01 0 1 100 11
`- - - -UW PATTERN - - - -
`I -CH O 1 01 0 011 11 01 0 0 0 1 1 1 001 001
`
`DOWN
`
`
`INITIAL VALUE: 64(octal) Q-CH 110011010101111110000010
`
`UP
`
`
`FIG.6
`
`2-RA Y MODEL: i-=400ns
`f0=10Hz
`
`--�--4Mbit/s
`···•···
`8Mbit/s
`
`a: w
`
`Cl)
`
`2-Div.
`MAC
`
`4-Div.
`MAC
`10· ,..____._�__,._____._...,___........_�....____,,_.__�_.__�
`0
`10 20 30 40
`Eb/No
`
`. .
`
`•
`
`6
`
`Intel, Exhibit 1014
`
`

`

`
`
`US 6,442,146 Bl
`
`1
`
`
`
`2
`which is characterized in that communications between
`
`
`TIME-DMSION MULTIPLE-ACCESS
`
`
`the mobile stations and the base station are made by
`
`COMMUNICATION SYSTEM
`
`
`means of radio communication in a selected communica­
`
`
`
`tion environment with the prepared conditions including
`BACKGROUND OF TIIE INVENTION
`
`
`
`additional conditions such as an aotenna gain, a diversity
`
`
`
`The present invention relates to a communication system 5
`
`method and frequency hopping.
`
`
`using a TOMA (rime-Division Multiple-Access) method
`
`
`
`(3)Another object of the present invention is to provide a
`
`
`and more particularly to a communication system which
`
`
`IDMA communication system as mentioned (1) or (2)
`
`
`
`
`adapts to different communication environments or provides
`
`
`above, which is characterized in that priority of the
`
`
`
`
`different communication environments for transmitting and
`
`
`
`different communication environment conditions are reg­
`10
`
`receiving signals.
`
`
`
`istered in a data base allowing the communication devices
`
`
`
`to select one of the communication environments accord­
`
`
`
`The highly-advanced information technology era has
`
`ing to the preset priority.
`
`
`
`brought with it the increasing demand for systems and
`(4)Another object of tbe present invention is to provide a
`
`
`
`
`
`
`
`
`devices allowing users to conduct wireless (radio
`
`
`
`TOMA communication system as mentioned any one of
`
`
`
`communication) telephone or data-communications in a
`
`
`(1)tu (3) above, whit:11 il; cbaractcrizctl in that the plural
`
`
`
`
`
`
`variety of situations, e.g., during walking outdoor or moving
`15
`
`
`
`sets of different communication environment conditions
`
`
`on a vehicle or working in an office. The present rapid
`
`
`are prepared for at least two of different environments
`
`
`
`development of iofrastruen1rcs for various kiods of commu­
`
`
`
`comprising ao office communication environment, a
`
`
`
`nication systems such as tele-communications with cordless
`
`
`
`walking-speed communication environment, a mobile­
`
`
`
`
`telephones, portable telephones and local-area networks
`
`running-speed communication environment and a satellite
`
`
`(LAN) radio-communications makes it possible for any one
`20
`
`communication environment.
`
`
`to communicate with any other person any time at aoy place.
`(5)Another object of the present invention is to provide a
`
`
`
`
`
`
`
`However, many infrastructures have incompatible sys­
`
`
`
`TOMA communication system as mentioned any one of
`
`
`
`tems that require the use of specially designed terminals,
`
`
`(1)to (4) above, which is characterii.ed in that the base
`
`
`preventing terminals from being used in common between 25
`
`
`station generates individually each set of the communi­
`
`
`
`the systems. For example, two representatives of TDMA
`
`
`
`
`cation environment conditions and broadcasts the gener­
`
`
`
`
`
`
`communication systems, i.e., Personal Digital Cellular sys­
`
`
`
`ated environmental information and each mobile station
`
`
`
`tem (PDC) and Personal Handy-phone system (PIIS) are
`
`
`
`receives the broadcasted information and automatically
`
`
`
`incompatible and use different radio-frequencies, transmis­
`
`
`
`selects a corresponding one of the prepared sets of the
`
`
`
`sion power values, a number of slots per frame, bit rates, 30
`
`
`
`communication conditions according to the received
`
`
`
`
`methods for coding aod decoding audio signals and so on.
`
`
`information of commuaication-enviro"i'iment conditions.
`
`The incompatibili1y of 1he communications sys1ems
`
`
`
`
`
`(6)Another object of the present invention is to provide a
`
`
`
`requires users to use di1Iereot devices (PHS, PDC, Pagers,
`
`
`
`TDMA communication system as mentioned any one of
`
`
`
`
`and so on) specially designed for respective systems to make
`
`
`(1)to (4) above, which is characterized in that any of the
`
`
`
`wireless (radio communication) telephone or da1a-35
`
`
`
`prepared sets of the communication conditions can be
`
`
`
`
`communications during walking from a vehicle or [rom an
`
`
`manually selected and set.
`
`
`
`office. Ibis is inconvenient for users. A terminal that can
`(7)Another object of the present invention is to provide a
`
`
`
`
`
`
`
`
`reali7.c functions of two different systems may be manufac­
`
`
`
`TOMA communication system as mentioned any one of
`
`
`
`tured with an increased size because it must contain many
`
`
`(1) to (6) above, which is characterized in that equalizing
`
`
`
`processing circuits that cannot be commonly used.
`40
`
`
`means with an adaptive equalization mode being changed
`
`
`
`according to a selected one of the communication envi­
`SUMMARY OF THE INVENTION
`
`
`
`ronments are additionally provided for improving a bit
`
`
`
`Accordingly, the present invention is directed to provide
`
`
`error rate in a fading channel.
`
`
`a TDMA communication system which adapL5 to different
`
`
`
`(8)Another object of the preseot invention is to provide a
`
`
`
`communication environments or prepares different commu-45
`
`
`
`TOMA communication system as mentioned any one of
`
`
`
`
`nica1ion environments for communications between mobile
`
`
`(1)to (7) above, which is characterized in that the system
`
`
`
`
`
`stations and base stations and allows each mobile terminal 10
`
`
`is provided \vith a data base for controlling whole com­
`
`
`
`
`conduct radio-communication at different transmission rates
`
`
`
`munication environments of mobile stations communicat­
`
`under different environments.
`
`
`ing with other mobile stations through the base station
`
`
`
`
`An object of the present invention is to provide a TOMA 50
`
`
`
`over a radio channel established between them and the
`(1)
`
`
`communication system for executing communications
`
`
`data base is adaptable 10 changing channel connections
`
`
`
`
`between mobile stations and a base station using a IDMA
`
`
`
`from one environment to another different environment.
`
`
`
`method, wherein a TOMA format that has a constant time
`
`
`
`
`(9)Another object of the present invention is to provide a
`
`
`of a frame length and a coostaot number of bits in each of
`
`
`
`TOMA communication system as mentioned any one of
`slots composing a frame is used as a common-use com-55
`
`
`(1)to (8) above, which is characterized in that the TOMA
`
`municat.ioa data format and each of the mobile and base
`
`formal is a formal that can be commonly used by a
`
`
`
`
`stations is provided each with a communication device for
`
`
`
`personal handy-phone system (PIIS).
`
`
`
`processing communication signals based on the TOMA
`
`BRIEF DESCRIPTION OF DRAWINGS
`
`
`format, which device can operate in any one of plural
`
`
`FIG. 1 is illustrative of a structure of a whole TDMA
`
`
`
`
`different Communication environments designated by 60
`
`
`
`communication system emhodying the present invention.
`
`
`
`selecting a corresponding one of prepared sets of covi­
`
`
`fIG. 2 is a construction diagram of a Lransminer-receiver
`
`
`
`
`ronmeotal communication conditions each including a
`
`
`which is a component of the TDMA communication system
`
`
`
`transmission power value, a modu.lation method, Lhe
`
`according lo the present invention.
`
`
`number of multiplexed signals and an error-correction
`
`
`
`flG. 3 is illustrative of an exccnplificd structure of a
`method.
`65
`
`TOMA frame and slots, which is used in a TDMA commu­
`(2)Another obje.cl of the present invention is to provide a
`
`
`
`
`
`
`
`
`nication system according to the present invention.
`
`
`TOMA communication system as meotioned (1) above,
`
`Intel, Exhibit 1014
`
`

`

`
`
`US 6,442,146 Bl
`
`4
`3
`signal. Thea the lraasmissioa-frequeacy converting portion
`
`
`
`
`
`
`FIG. 4 depicts an example of specifications oa respective
`
`
`
`portion 34 converts 13 through the freq uency synthesizing
`
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`
`
`environments created by the TOMA communication system
`
`according 10 the present invention.
`
`
`the modulated signal into a req uired radio-frequency signal
`
`
`to be transmitted over the network. The transmission-power
`
`
`FIG. 5 depicts an example of a unique word pattern in
`
`
`
`5 control portion 14 controls transmission power of the radio­
`
`construction of slots shown in FIG. 3.
`
`frequency signal.
`
`
`FIG. 6 depicts an example of BER characteristics
`On the other band, in the receiver side, a radio-frequency
`
`
`
`
`
`obtained by an array combining type adaptive equalizer used
`
`
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`
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`signal is received through an antenna and is converted by the
`for 16 QAM.
`
`
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`received-frequency converting portion 26 with the fre-
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`
`
`JO queacy synthesizing portion 34 to a signal that can be
`PREFERRED EMBODIMENTS OF THE
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`
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`
`
`subject to baseband processing. The converted signal is
`INVENTION
`
`
`
`orthogonally demodulated by the quadrature demodulating
`
`
`
`
`Preferred embodiments of the present invention will be
`portion
`25.
`
`
`
`described below in detail wiib reference 10 accompanying
`lo the shown embodiment, there are pairs of the received-
`
`drawings.
`
`
`
`15 signal converting ponion 26 with the quadrature detecting
`
`
`FIG. 1 depicts a structure of a TOMA communication
`
`
`
`
`(demodulating) portion 25, either one pair that yields a
`
`
`system according to the present invention.
`
`
`
`
`communication route with the better quality signal is
`
`As shown in FIG. 1, the system provides respective
`
`
`selected by the diversity combining portion 24. The adaptive
`communication environments such as aa office communi­
`
`
`
`
`
`
`equalizing portion 23 equalizes a waveform of the signal and
`cation environment, a walking-speed mobile communica­
`
`
`
`
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`
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`20 the discriminating portion 22 outputs a binary digital signal.
`
`
`tion environment, a vehicle-running-speed mobile commu­
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`
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`
`
`The channel decoding portion 21 decodes the digital signal
`
`
`
`nication environment and a satellite communication
`
`
`to obtain a necessary information signal.
`
`
`environment, all of which arc connected with each other
`
`
`The control portion 32 controls the operations of the
`
`
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`through a communication network. There is shown an
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`
`portions and the whole communication system at predeter-
`
`
`
`example of the TDMA communication system wherein the 25
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`
`
`111im:t.l ti111i11g usiug ti111i11g pulses gt:ut:rateu frurn llit: dock­
`
`
`system of the vehicle-running-speed environment includes
`
`pulse generating portion 33.
`
`
`the system of the walking-speed environment with mobile
`The environment estimating and selecting portion 31
`
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`
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`stations (i.e., the latter system without any modilication of
`
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`
`
`generates a signal for setting one of communication cnvi-
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`
`
`the preset conditions can be a component of the former
`
`
`30 ronments based on a manual selection of the predetermined
`syslem).
`
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`
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`conditions, automatic selection of information from the base
`
`lbe system according 10 each of the communication
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`
`
`
`station or estimation of the transmission channel (route).
`environments has a mobile-exchange function, a base­
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`
`
`
`
`
`According to the signal outputted from the environment
`station function and a mobile-station function as its com­
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`
`
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`
`
`estimating and selecting portion 31, the control portion 32
`
`ponents. Each base station and each mobile station have a
`
`
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`
`the signal point for method by changing 35 selectS a modulating
`
`
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`transmitter-receiver set for executing the system operations.
`
`
`
`channel coding, selects an error-detection/correction method
`
`
`
`The communication network interconnecting the system
`
`
`
`
`for the channel codi.ag portion 11 and the channel decoding
`
`
`
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`in respective communication environment includes a data
`
`
`
`
`portion 21 and changes a number of multiplexing signals by
`
`
`
`base containing records and certificates of identification
`
`
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`changing a frequency dividing ratio of the clock-pulse
`
`
`
`numbers of mobile terminals existing ,vithin the service
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`
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`40 generating portion 33. The control portion 32 can control the
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`area, the current conditions of environment for the terminals,
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`
`
`transmission power control portion 14 to control a
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`
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`classes of the terminals, and so on. Accordingly, each mobile
`
`
`transmission-power value and tbc adaptive equalizing por­
`
`terminal can adapt 10 each communication environment
`
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`
`
`tion 23 to select an adaptive equalizing method. The control
`
`
`when moving from one environment to another different
`
`
`
`
`portion 32 can also control the frequency bopping by
`environment.
`
`
`
`
`34 and of the frequency synthesizer 45 changing a preset value
`
`
`
`
`controls the diversity selecting portion 24 to select a diver­
`
`
`
`FIG. 2 depicts an exemplified structure of a transmitter­
`sity route.
`
`
`
`receiver of a mobile station that is a component of the
`The following description relates to a frame structure
`
`
`
`
`
`TDMA communication system according to the present
`
`according to a TOMA format which is used as a data
`invention.
`50 communication
`
`format featuring the TDMAcommuaicatioa
`
`
`
`The transmitter-receiver is provided with a channel cod­
`
`system of the present invention.
`
`
`
`ing portion (including an crror-dctcction/corrcclion coding
`
`
`FIG. 3 shows an exemplified structure of a TOMA frame
`
`
`
`
`portion) 11 for encoding information signals from a sound
`
`
`to be used in the cbaoocl coding portion 11 shown in FIG.
`
`encoding/decoding codec (not shown) and a data portion
`
`
`
`2. The frame bas a constant frame length, a variable number
`
`
`
`
`(not shown), a quadrature modulating portion 12, a
`
`
`
`modulation method, 55 of multiplexed slots and a variable
`
`
`
`transmission-frequency converting portion 1 3, a
`
`
`
`which is adaptable to use in dilicrcnl environments or al
`
`transmis.5ion-power control portion 14, a frequency synthe­
`
`
`
`
`different user rates.
`
`
`
`
`
`sizing portion 34, a clock-pulse generating portion 33, a
`
`
`
`received-frequency converting portion 26, a quadrature
`As shown in FIG. 3, a frame-structure Fr having a
`
`
`
`
`
`detecting (demodulating) portion 25, a diversity combining
`
`
`
`constant frame length of 10 ms and is composed basically of
`
`
`
`portion 24, an adaptive equalizing portion 23, discrimjnating
`
`
`
`of down BCCH Scl and 60 slots for control (control slots)
`
`
`
`
`
`portion 22, a channel decoding portion (including an error­
`
`
`up/down SCCH Sc2 respectively and slot for communica­
`
`
`
`detection/correctioo portion) 21, an environment estimating
`
`tion (communication slot) TCII Si.
`
`
`
`
`and selecting portion 31 and a control portion 32.
`Communication environments are prepared with condi­
`
`
`
`
`
`tions preset al the base station. The transmitter-receiver
`
`
`In the transmitter side, the channel coding portion 11
`
`
`
`
`65 terminal of each mobile station can be adaptable to any one
`
`
`
`
`encodes an information signal to form rcqufrcd TOMA
`
`
`
`of the prepared environments. which is selected by connect­
`
`
`frame-s in accordance with the channel. The quadrature.
`
`
`
`
`modulator portion U orthogonally modulates the coded
`
`
`
`ing a channel in an environment selected from a variable
`
`Intel, Exhibit 1014
`
`

`

`
`
`US 6,442,146 Bl
`
`6
`5
`
`
`range of digital modulation method QPSK/16 QAM at the
`by the control information. The control iaformatioa of the
`
`
`
`
`
`
`quadrature modulator portion U and the multiplexing num­
`
`
`BCCI-I contains other information for the mobile slation
`
`ber of 4 to 64 according to a user rate of 128 kbps to 4.096
`
`
`other than the carrier bit rate and the modulating method.
`
`
`Mbps and a constant number of bits in each slot. lo FIG. 3,
`
`
`Accordingly, the mobile station can know a possible
`
`
`
`a ramp bit is denoted by character R, a preamble PR, a 5
`
`
`communication mode from the BCCH received from a
`
`
`
`
`unique word UW, channel identifier Cl, a control bit C, aa
`
`
`
`
`certain base station. The user at a mobile terminal (station)
`
`
`information bit I, a CRC check Bit CRC and guard bit G.
`
`
`
`
`
`can select a desired communication environment, i.e., a base
`
`
`
`
`station which provides the desired environment. The mobile
`
`
`The number of bits in every slot is 480 (constant). A basic
`
`
`
`station can also know which environments (i.e., base
`
`
`
`service rate signal 2B+D of the ISDN (Integrated Service
`
`
`
`stations) are possible to use by scanning the broadcast
`
`
`
`
`Digital Network) can be easily traosmined by setting an JO
`
`
`
`channels from base stations existing in the service area
`
`
`1-to-C ratio in the oommunication slot Si at 8:1 and by
`
`
`where the mobile station moves.
`
`
`making a user information transmitting portion 28 (2B=64
`
`
`
`kbpsx2=128 kbps) and a co01rol information transmitting
`With the user's request, the mobile station can automati­
`
`
`
`
`
`portion D (D-16 kbps) correspond to I and C respectively.
`
`
`
`cally select in a programmed procedure a base station where
`
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`
`
`it is waiting for connection with another mobile station. The
`
`FIG. 5 shows an example of the unique word in the slot 15
`
`
`
`
`
`above-mentioned function for selecting a base station can be
`
`structure shown in FIG. 3.
`
`
`
`
`realized by previously registering the priority of base sla­
`
`
`FIG. 4 shows an exemplified technical specification of
`
`
`
`
`tions producing different communication environments and
`
`
`
`respective environmeats in which the WM/\ communica­
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`
`
`by selecting a suitable one according to the rcgislered
`
`
`tion system according to the present invention must work.
`20 priority.
`
`
`The operation of the TOMA communication system
`The location of the mobile station is registered in the
`
`
`
`
`
`
`according to the present invention, which includes the
`
`
`
`
`
`selected base station wherein the mobile station is in waiting
`
`
`
`mobile station provided with the traosmitter•receiver and
`state.
`
`
`
`working with the mMA format frame in respective envi­
`TDMA(fDD (Time Division Duplex) system provides
`
`
`
`
`
`ronments having the specifications shown in FIG. 4, will be
`25
`
`
`operations modes lo be used for communication lbal may
`
`described below:
`
`
`have a very high correlation of propagation state between an
`
`As shown in FIG. 4, an environment P (walking) provides
`
`
`
`uplink and a downlink when the frame length is sufficiently
`
`
`
`
`64 sluts µc1 fia111c (IO 111s) at a 111axi111u111 usc1 iatc uf 2.048
`
`
`
`
`short. Therefore, the system can adopt an adaptive modula-
`
`Mbps and adopts a modulating method QPSK while an
`
`
`method and a bit rate30 lion melhod that changes a modulation
`
`
`
`enviroomeat V provides 4 slots per frame (10 ms) at a
`
`
`
`
`per slot instantly with the change in the transmission state by
`
`maximum user rate of 128 kbps and adopts the modulating
`
`
`estimating instant CNR and a spread of a phase lag (refered
`method QPSK.
`
`to Technical Report of TETCE RCS94-64).
`
`
`
`It is possible to use the processing circuit of the system in
`
`
`
`Generally, an initial call negotiation between a base
`
`
`
`common for differeat user-information transmilliog rates by
`
`
`
`
`
`mode the operating station determines 35 station and a mobile
`
`
`changing the number of slots per frame at a constant number
`
`
`for communication, in which the base station and the mobile
`
`
`
`( 480)of bits per slot. This can be realized by changing the
`
`
`
`station work at a constant modulation method and a constant
`
`
`clock of the hardware depending on a user-information
`
`bit rate while the call is maintained therebctween.
`
`transmitting rate.
`
`
`The required CNR/CIR value must be reduced since they
`Although the above embodiment is described with the
`
`
`
`
`may have a considerable influence on a bit rate, a cell radius
`40
`
`frame length of 10 ms, it can also work at the frame-length
`
`
`and a required transmission power.
`
`
`
`
`o(, e.g., 5 ms to ensure compatibility of the system with PHS
`
`
`The reduction of the required CNR/CIR value in the
`
`(Personal Handy Phone System e.g. RCR-STD 28).
`
`
`TOMA communication system according 10 the present
`
`
`
`Accordingly, application of the method according to the
`
`
`
`invention can be realized by applying any one of the
`
`
`
`present invention can facilitate miniaturizing the terminal
`
`following known methods:
`45
`devices.
`
`
`
`High-speed transmission at a time from a plurality of
`On the other band, a bit rate of carriers used for commu­
`
`
`
`
`stations (4-brancb diversity):
`
`
`
`
`nication between the base station and the mobile station
`
`
`This method enables transmission with a transmission
`
`
`
`
`varies depending on Lhe user-information lransmiuing rate
`
`power of 10 W at a bit rate of 1 Mbps in a cell having a
`as shown in FIG. 4.
`
`
`
`50 radius of not less than 2 km. (Tomisato and Suzuki, ·'A
`
`
`
`
`
`Different radii of service areas and different maximal rates
`
`
`
`
`High-speed digital mobile radio communication system by
`
`
`
`of information transmis.sion must be realized depending
`
`
`
`usiog multitraosmitler signal transmissioo", 1995, IEICE
`
`
`
`
`upon different communication environments (i.e., an office
`
`society symposium B-386)
`
`
`
`environment, a walking-speed environment, a vehicle
`
`
`
`Interference coaceling equalization (ICE) for improve-
`
`
`
`
`running-speed environment, a satellite environment, and so
`55 meat of Cffi:
`
`
`
`on). Therefore, each base station is provided with equipment
`This method cao expaod tbe system capacity for accom·
`
`
`
`
`
`
`that has different transmission power values, antenna gains
`
`
`modatiog subscribers twice as much as PDC by making
`
`
`
`and carrier bit rates in accordance with the different envi-
`
`common use of the same frequency by two users in the same
`ronments.
`sector.
`
`
`
`The base station has a broadcasting channel (BCCH) for 60
`(Suzuki and Hirade, "Capacity increase ofTDMAmobile
`
`
`
`
`
`
`
`
`
`always braodcasting control information at different carrier
`
`
`
`communication systems enhanced with inlcrferoacc cancel­
`
`
`bit rates. The mobile station can previous
`.ly know a trans­
`
`
`ling equalizers (ICE)", 1995, IEICE society symposium
`mission frequency, a carrier bit rate and a modulating
`
`
`B-276).
`
`method of signals from the base station.
`Dynamic Channel Allocation
`
`
`
`
`
`
`The mobile station receives control information over the 65
`The simulation test results show that the efficieocy of
`
`
`
`
`
`
`using frequencies is increase.d by dynamic cbaaae.1 alloca­
`
`
`broadcasting cbaaae.l (BCCH) and is placed under the.
`
`
`
`
`control of Lhe system constructed on the conditions indicated
`
`
`
`
`tion rather than fixed channel allocation, for example, 2.5 to
`
`Intel, Exhibit 1014
`
`

`

`
`
`US 6,442,146 Bl
`
`8
`7
`data of generated communication eavironmellls from the
`
`
`
`3 times by an ACCA method aad 2 times by a segregatioa
`
`
`
`base station and sets corresponding conditions according
`
`
`method. The miaistry of Posts and Telecommunications,
`
`
`
`to the received data to connect itself to the base station.
`
`
`
`
`"Final report on research and study of an intelligent radio­
`
`
`
`(6)In addition to the advantageous effect any one of (1) to
`
`wave-utilization", ApriJ 1994).
`
`
`
`(4)mentioned above, each mobile terminal can be selec­
`
`Adaptive Modulation
`5
`
`
`tively set by hand to conditions necessary for communi­
`
`
`
`
`A system capacity can be increased by adaptively chaag­
`
`
`
`
`cation with a base station, thus realizing simple construc­
`ing a QPSK/16 QAM rate in the range from 1 to Ya according
`
`
`t ion of the terminal in comparison with that of the
`
`
`
`to CIR values at the periphery and the center of a cell.
`
`
`
`terminal of claim 4. This also enables the terminal to be
`
`
`
`(Sampei et al. "An analysis on the performance of vari­
`
`
`faster connected to the base station.
`10
`
`
`able symbol rate and modulation level adaptive moduJation
`
`
`(7)lo addition to the advantageous effect any one of (1) to
`
`
`
`
`system", Technical report of IEICE RCS94-64 (1994-09)).
`
`
`
`
`(6)mentioned above, a bit-error-rate in a fading channel
`
`
`The adaptive equalizing portion 23 in the example of the
`
`
`
`can be improved, thus increasing the accuracy of com­
`
`
`transmitter-receiver of FIG. 2 can use the following types of
`municatioas.
`equalizers:
`(8)In addition to the advantageous effect any one of (1) to
`
`
`
`
`Ao adaptive equalizer used in QPSK may be; for example,
`
`
`
`
`15 (7)mcntiuncd al.,uvi.:, each muuilc terminal can continue
`
`
`
`a combined type diversity decision feed back equalizer
`
`the communication when it moves from one area into
`
`
`(DFE) that is featured by a saved capacity of its memory
`
`
`
`another area of di[ereot communicatioa environment.
`
`
`
`necessary for operations and signal processing. (Shirato ct
`
`
`(9)Io addition to the advantageous eff