Title:
セルラ電話システム用、簡略型全地球測位システム受信機コードシフト検索スペース
Document Type and Number:
Japanese Patent JP4023652
Kind Code:
B2
Abstract:
A Global Positioning System (GPS) receiver located at a base station of a cellular telephone network determines the location of the base station and obtains GPS ephemeris and, if available, timing information. A server uses the obtained information to calculate auxiliary information for use by a GPS receiver. The base station transmits the auxiliary information to the GPS receiver which is located within a cellular telephone operating within the service area of the base station. The cellular telephone GPS receiver uses the auxiliary information to determine the location of the cellular telephone and transmits location information to the cellular telephone network via the cellular telephone and the base station.
Inventors:
Camp, William, Oh, Junior
Zanzi, Cambiz
Ramesh, Rajaram
Zanzi, Cambiz
Ramesh, Rajaram
Application Number:
JP2000516241A
Publication Date:
December 19, 2007
Filing Date:
October 14, 1998
Export Citation:
Assignee:
ERICSSON INC.
International Classes:
G01S1/00; G01S5/00; G01S5/02; G01S19/06; G01S19/08; G01S19/13; G01S19/21; G01S19/25; G01S19/37; H04B7/26; H04W64/00
Domestic Patent References:
| JP7140223A | ||||
| JP4059489U |
Foreign References:
| US5365450 | ||||
| WO1997033382A1 | ||||
| WO1998025158A1 |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Youhei Kawabata
Kato Takushi
Yasuhiro Sakata
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Youhei Kawabata
Kato Takushi
Yasuhiro Sakata