USO0RE43950E
(19) United States (12) Reissued Patent
(10) Patent Number:
Serizawa et a]. (54)
(45) Date of Reissued Patent:
RADIO COMMUNICATION SYSTEM
(56)
U.S. PATENT DOCUMENTS
Inventors: Mutsumu SerizaWa, Tokyo-to (JP);
4,646,290 A *
Nobuyasu Nakajima, Kawasaki (JP); Koji Ogura, Tokyo (JP); Minoru Namekata, Kawasaki (JP); Takashi
FOREIGN PATENT DOCUMENTS JP
4-249442 A
Mukai, Yokohama (JP) (73) Assignee: Kabushiki Kaisha Toshiba,
OTHER PUBLICATIONS
This patent is Subject to a terminal dis-
Wikipedia, Advanced mobile Phone System printedAug. 25, 2011.*
claimer.
-
(Contrnued)
(21) Appl.No.: 12/546,326 (22) Filed:
9/1992
(Continued)
Kawasaki_shi (1p) Notice;
2/1987 Hills """""""""""""" " 370/345
(Continued)
Wakutsu, Kawasaki (JP); Manabu
(*)
*J an. 29, 2013
References Cited
INCLUDING SDL HAVING TRANSMISSION RATE OF RELATIVELY HIGH SPEED (75)
US RE43,950 E
Primary Examiner * William D Cumming
Aug. 24, 2009
(74) Attorney, Agent, or Firm * Foley & Lardner LLP
Related US. Patent Documents
Reissue of: (64) Patent NOJ 6,049,721 Issued: Apr- 11’ 2000 A_PP1- NOJ 09/055,973 Flled: Apr- 7’ 1998 U.S. Applications: (63) Continuation of application No. 11/272,736, ?led on
(57) ABSTRACT A large amount of user information is transmitted with good ef?ciency by means of a high-speed downlink by making transmission rates of an uplink circuit and a downlink asym metrical. The radio communication system includes a plural ity of base stations, a plurality of terminals, an uplink estab lished between each of the base stations and each of the
NOV. 15, 2005, HOW Pat. NO. Re. 41,132, Which iS 8 continuation of application No. 10/1 19,679, ?led on Apr. 11, 2002, now Pat. No. Re. 39,119, WlliCh is a continuation of application No. 08/492,728, ?led on Jun. 20, 1995, now Pat. No. 5,754,961.
terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink circuit established between each of the terminals and each of the base station for the purpose of radio transmission of prescribed data from a base station to a terminal. This radio communication system has a low-speed transmitting means, provided at the terminal, which transmits a radio signal at a
(30)
Foreign Application Priority Data
Jun. 20, 1994
(JP) ..................................... .. 6-137621
relatively low transmission rate to an above-noted base Sta
(5 1)
Int‘ Cl‘
tion via the above-noted uplink, a low-speed receiving means, provided at the base station, which receives a radio signal sent
(52)
H043 7/26 (200601) US. Cl. .............. .. 455/509; 455/8; 455/15; 455/17;
at a relatively low transmission rate from the terminal via the uplink’ a high_speed transmitting means, provided at the base
455/101; 455/447; 379/9301; 370/252; 370/282;
station, which transmits a radio signal at a relatively high
370/331; 370/337; 370/343
transmission rate to an above-noted terminal via the above
Of Classi?cation Search ............. ..
noted downlink’ and a high-Speed receiving means’ provided
455/8, 15, 17, 101, 409, 447, 450, 509, 517; 370/329, 216, 343, 345, 337, 331, 282; 380/270;
at the terminal, which receives a radio sent at a relatively high transmission rate from the base station via the downlink.
379/93.01; 375/147, 216, 260 See application ?le for complete search history.
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* Cited by examiner
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