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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