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Method and apparatus for performing mobile assisted hard handoff between communication systems

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04Q-007/00
출원번호 US-0816746 (1997-02-18)
발명자 / 주소
  • Tiedemann
  • Jr. Edward G.
  • Chen Tao
출원인 / 주소
  • Qualcomm Incorporated
대리인 / 주소
    Miller
인용정보 피인용 횟수 : 124  인용 특허 : 14

초록

A method and apparatus for performing inter-system hard handoff between communication systems or inter-frequency hard handoff within a CDMA communication system is disclosed. The purpose of this invention is to reduce the probability of dropped calls during inter-system hard handoff. In the event th

대표청구항

[ We claim:] [1.] A method for avoiding a loss of communication with a mobile station in a wireless communication system wherein the mobile station is moving from an area covered by an origination system into an area covered by a destination system and wherein the mobile station has attempted to acq

이 특허에 인용된 특허 (14)

  1. Gudmundson Bjorn (Sollentuna SEX), CDMA frequency allocation.
  2. Jin Go-Whan,KRX ; Cho Mou-Ho,KRX ; Cho Cheol-Hye,KRX ; Lee Hun,KRX, Channel allocation method for removing inter-cell hard handoffs in a CDMA system.
  3. Crichton Paul,GBX ; Oberoi Rupinder Singh,GBX ; Thomas Howard,GBX, Handover based on measured time of signals received from neighboring cells.
  4. Park Hyun-Hwa (Daejeon KRX) Jung Dong-Su (Daejeon KRX) Kim Dae-Sik (Daejeon KRX) Ahn Jee-Hwan (Daejeon KRX), Hard-handoff control method for a CDMA (Code Division Multiple Access) mobile switching center.
  5. Strawczynski Leo (Ottawa CAX) Sandler Howard M. (Ottawa CAX) Plett Gregory L. (North Gower CAX) Steer David G. (Nepean CAX), Intra-cell call hand-over in radio communication systems with dynamic channel allocation.
  6. Fleming Philip Joseph (Glen Ellyn IL) Stolyar Aleksandr (Buffalo Grove IL), Method and apparatus for controlling calls in a code division multiple access system.
  7. Weaver ; Jr. Lindsay A. ; Munsinger David B. ; Padovani Roberto ; Ziv Noam A. ; Karmi Gadi ; Gilhousen Klein S., Method and apparatus for hard handoff in a CDMA system.
  8. Weaver ; Jr. Lindsay A. (Boulder CO) Bayley Gwain (San Diego CA) Tiedemann ; Jr. Edward G. (San Diego CA) Gilhousen Klein S. (Bozeman MT), Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative.
  9. Lee Dong-Wook (Daejeon KRX) Kim Myoung-Jin (Daejeon KRX) Chung Yeoung-Jee (Daejeon KRX), Method and system for providing a different frequency handoff in a CDMA cellular telephone system.
  10. Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA), Method and system for providing a soft handoff in communications in a CDMA cellular telephone system.
  11. Vilmur Richard J. (Palatine IL) Bruckert Eugene J. (Arlington Heights IL), Method for preventing a dropped call during a handoff in a radiotelephone system.
  12. Blakeney ; II Robert D. (San Diego CA) Karmi Gadi (San Diego CA) Tiedemann ; Jr. Edward G. (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA), Mobile station assisted soft handoff in a CDMA cellular communications system.
  13. Meche Paul S. (Richardson TX) Hanley Donald V. (McKinney TX) Chrisman Larry D. (Plano TX) McCarthy Michael J. (Dallas TX), Mobile-assisted handoff technique.
  14. Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Weaver ; Jr. Lindsay A. (San Diego CA), Spread spectrum multiple access communication system using satellite or terrestrial repeaters.

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