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특허 상세정보

Method and arrangement for generating pilot beacons in wireless communication systems

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H04Q-007/00   
미국특허분류(USC) 370/331; 370/335; 370/332; 370/252; 370/329; 370/342; 455/436; 455/437; 455/453; 455/440
출원번호 UP-0356622 (2003-02-03)
등록번호 US-7768974 (2010-08-24)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Harness, Dickey & Pierce
인용정보 피인용 횟수 : 0  인용 특허 : 34
초록

In a method for generating pilot beacons for hard handoff over a border from a first environment to a second environment, the two environments using spread spectrum technology, a RF pilot signal may be received at an operational frequency used in at least the second environment. The RF signal may be downconverted to an IF pilot signal, filtered and then upconverted to a first reproduced RF pilot signal. The first reproduced RF pilot signal may be at a operational frequency used in a first environment, and may represent a pilot beacon for hard handoff bet...

대표
청구항

What is claimed is: 1. A method for generating pilot beacons for hard handoff over a border from a first environment to a second environment using spread spectrum technology, comprising: receiving an RF pilot signal on an operational frequency used in the second environment; downconverting the RF pilot signal to an IF pilot signal; filtering the IF pilot signal; first upconverting the entire filtered IF signal to a first reproduced RF pilot signal that is at an operational frequency used in the first environment, and which represents a pilot beacon for ...

이 특허에 인용된 특허 (34)

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  4. Shin Yeong-Jong,KRX. Handoff control method and communication system in a multiple frequency environment. USP2000066075990.
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  6. Shin, Yeong Jong. Inter-frequency handoff method. USP2003046549524.
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  9. Czaja, Stanislaw; Jones, William; Kenney, Thomas; Anderson, Kraig. Method and apparatus for performing an interfrequency search. USP2005036865173.
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  21. Chang, Chu-Rui; Yee, Meng. Method and system for generating multiple pilot beacons of different frequencies from a single pilot beacon. USP2003096621811.
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  23. Yarkosky,Mark L.; Pope,John. Method and system for overcoming pilot pollution in a wireless communications network. USP2008107437159.
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  26. Joo,Ki Hyun; Rha,Peter S.; Kang,Chol Su; Hyun,Sang Kyoon. Method of handoff control in an enterprise code division multiple access wireless system. USP2006037016331.
  27. Thomas G. Bishop ; Manuel M. de Oliveira Neto. Methods and systems for producing three-dimensional images using relief textures. USP2002076424351.
  28. Shin,Yeong Jong. Mobile communication system and method of processing handoff for the same. USP2008037346351.
  29. Tran, Scott. Pilot beacon trigger enhancement with hysterisis. USP2004116826402.
  30. Chu-Rui Chang ; Meng Yee. Precision hard handoff method using pilot beacon distributors. USP2002076424834.
  31. Shahidi, Reza; Lima, Octavio Jose De Franca; Chen, Jen M.; Duan, Long L.; Sesnic, Tom T.. Slewing detector system and method for the introduction of hysteresis into a hard handoff decision. USP2004116826161.
  32. Ramahi,Emad. System and method for handoff in a CDMA network. USP2007127313398.
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