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Method and apparatus for reliable intersystem handoff in a CDMA system

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04L-077/00
출원번호 US-0695241 (1996-08-07)
발명자 / 주소
  • Padovani Roberto
출원인 / 주소
  • QUALCOMM Incorporated
대리인 / 주소
    Miller
인용정보 피인용 횟수 : 64  인용 특허 : 14

초록

In a communications network, a network user communicates through a remote unit via at least one base station. The communications network includes a first mobile switching center for controlling communications through a first set of base stations and a second mobile switching center for controlling c

대표청구항

[ We claim:] [1.] A method for providing communications between a remote unit and at least one base station, wherein said at least one base station is controlled by a first mobile switching center which controls communications through a first set of base stations or by a second mobile switching cent

이 특허에 인용된 특허 (14)

  1. Arnold Hamilton W. (Neptune NJ) Devasirvathan Daniel M. (Lakewood NJ) Sollenberger Nelson R. (Tinton Falls NJ) Sutliff Larrie G. (Briarcliff Manor NY) Varma Vijay K. (Holmdel NJ), Beacon detection method and apparatus for sharing spectrum between wireless communications systems and fixed microwave s.
  2. Lomp Gary R. (Centerport NY) La Vean Gilbert (Reston VA) Schilling Donald L. (Sands Point NY), CDMA cellular hand-off apparatus and method.
  3. Jiang Hua ; Xu Jim ; Tekinkay Sirin, Channel reservation and power control for improved handoff performance.
  4. Schilling Donald L. (Sands Point NY), Dynamic capacity allocation CDMA spread spectrum communications.
  5. 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.
  6. Schmidt Chris (Wheaton IL) Kotzin Michael D. (Buffalo Grove IL) Menich Barry J. (Schaumburg IL) Bruckert Eugene J. (Arlington Heights IL), Method and apparatus communication handover in a communication system.
  7. Gilhousen Klein S. (Bozeman MT) Karmi Gadi (La Jolla CA) Tiedemann ; Jr. Edward G. (San Diego CA) Holcman Alejandro Raul (San Diego CA), Method and apparatus for handoff between different cellular communications systems.
  8. Barnett Charles A. (Sterling VA) Kay Stanley E. (Rockville MD) King Lou (Mt. Airy MD) Mehta Ashok D. (North Potomac MD), Method and system for effecting handoff in a cellular communication system.
  9. Brunner Richard (Montreal CAX) Dulong Daniel (Pincourt CAX), Method and system for implementing a backup digital control channel within a cellular telecommunications network.
  10. 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.
  11. Ho C. M. Peter (Charlotte NC) Lockton John D. (Hillsborough CA), Radio frequency sharing personal communications system.
  12. Madebrink Monica B. K. (Stockholm SEX) Ghisler Walter (Upplands Vasby SEX) Ramstedt Ake L. (Upplands Vasby SEX) Hoff Anders C. E. (Hagersten SEX) Nordstrom Sven G. (Molndal SEX) Bergling Gunilla A. (, Reconfiguration in a cellular communications network.
  13. Muszynski Peter,FIX, Semi-hard handoff in a cellular telecommunications systems.
  14. Menich Barry J. (Schaumburg IL) Kotzin Michael D. (Buffalo Grove IL), Signal processing in communication systems.

이 특허를 인용한 특허 (64)

  1. Park,Ji Hoon, Apparatus for performing a handover between different mobile communication systems and method for controlling the same.
  2. Judd,Mano D., Architecture for digital shared antenna system to support existing base station hardware.
  3. Chowdhary, Yousuf; Brunet, Jeffrey; Collins, Ian, Centralized rules repository for smart phone customer care.
  4. Gerdisch Mitchell R. ; Kilpatrick John A., Co-located omnidirectional and sectorized base station.
  5. Montojo, Juan; Kim, Byoung-Hoon; Malladi, Durga Prasad; Sarkar, Sandip, Control arrangement and method for communicating paging messages in a wireless communication system.
  6. Kapadekar, Vivek; Rao, Bindu Rama, Device management in a network.
  7. James David Larsen ZA; Mark Sievert Larsen ZA, Enhanced cellular communication system.
  8. Hunzinger,Jason F., Forward link based rescue channel method and apparatus for telecommunication systems.
  9. Hunzinger,Jason F., Forward-link rescue synchronization method and apparatus.
  10. Matusevich, Alex, Handing off a wireless terminal in a wireless telecommunications system.
  11. Shin Yeong-Jong,KRX, Handoff control method and communication system in a multiple frequency environment.
  12. Kondo, Seiji, Handover method in code division multiple access communication system and system thereof.
  13. Keurulainen Jere,FIX ; Hakkinen Hannu,FIX ; Hamalainen Seppo,FIX, Handover method, and a cellular radio system.
  14. Woo, Hsien; Tsui, Felicia; Nagarajan, Viswanath, Hard handoff target generation in a multi-frequency CDMA mobile network.
  15. Chen, Shao-Chun; O'Neill, Patrick; Sotos, Peter L.; Lim, Jeong M.; Jacobi, Sidney Andrew, Initialization and update of software and/or firmware in electronic devices.
  16. Proctor, James A.; Alapuranen, Pertti O., Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure.
  17. Proctor, Jr., James A.; Alapuranen, Pertti O., Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure.
  18. Proctor, Jr., James A.; Alapuranen, Pertti O., Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure.
  19. Tiedemann, Jr., Edward G.; Glauser, Olivier, Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system.
  20. Tiedemann, Jr., Edward G.; Glauser, Olivier, Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system.
  21. Tiedemann, Jr.,Edward G.; Glauser,Olivier, Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system.
  22. Tee,Lai King, Method and apparatus for dynamically determining a mobile station's active set during a connection rescue procedure.
  23. Rodney Edward Marcum, Method and apparatus for optimizing parameters of a communication system.
  24. Chen, Tao; Tiedemann, Jr., Edward G.; Saints, Keith W., Method and apparatus for performing mobile station assisted hard handoff using error correction codes.
  25. Chen, Tao; Tiedemann, Jr., Edward G.; Saints, Keith W., Method and apparatus for performing mobile station assisted hard handoff using error correction codes.
  26. Jalloul,Louay; Tenbrook,Keith A.; Luz,Yuda Yehuda; Chen,Jiangnan (Jason); Rotstein,Ron, Method and apparatus for soft handoff communications in a communication system operating according to IS-95B and IS-95C standards.
  27. Odenwalder, Joseph P., Method and system for performing a handoff in a wireless communication system, such as a hard handoff.
  28. Odenwalder, Joseph P., Method and system for performing a handoff in a wireless communication system, such as a hard handoff.
  29. Grilli, Francesco; Willenegger, Serge; Tiedemann, Jr., Edward G., Method and system for performing handoff in wireless communication systems.
  30. Jong-Youn Kim KR, Method and system for providing inter-frequency handoff in a telephone system.
  31. Kim, Jong-Youn, Method and system for providing inter-frequency handoff in a telephone system.
  32. Kim,Jong Youn, Method and system for providing inter-frequency handoff in a telephone system.
  33. Proctor, Jr., James A., Method for compensating for multi-path of a CDMA reverse link utilizing an orthogonal channel structure.
  34. Chang,Yong, Method for providing concurrent service handoff in a mobile communication system.
  35. Kabasawa, Shizuko, Method of controlling intersystem hand-off by subtracting margin value from pilot signal strength of other system.
  36. Girardeau Laurent,FRX ; Cherpantier Corinne,FRX, Method of handling over a call between two relay stations of a cell of a digital cellular mobile radio system.
  37. Stephane Saada FR; Michael Roberts FR, Method of improving cooperation between entities during call handover.
  38. Nasielski, John W.; Hsu, Raymond T., Methods and apparatuses for CDMA2000/GPRS roaming.
  39. Hunzinger, Jason F., Minimum interference multiple-access method and system for connection rescue.
  40. Yu, Zhi-Zhong; Dhanda, Mungal Singh, Multiple-frame offset between neighbor cells to enhance the GERAN signaling performance when power control for signaling is in use.
  41. Yu, Zhi-Zhong; Dhanda, Mungal Singh, Multiple-frame offset between neighbor cells to enhance the GERAN signaling performance when power control for signaling is in use.
  42. Pennock,James D.; Urry,Robin M.; Hanson,John D.; Geisler,Jeremy, Musical effect customization system.
  43. Chia, Teck; Dinh, John D. V.; Gustafson, James P., Network for updating electronic devices.
  44. Hunzinger,Jason F., Open-loop power control enhancement for blind rescue channel operation.
  45. Iverson,Kent; Tatipamula,Mallikarjun; Blair,Dana; Macpherson,Matthew, Optimization of bearer traffic in radio networks.
  46. Jalali, Ahmad; Schiff, Leonard N.; Ames, William G., Overlaying an air to ground communication system on spectrum assigned to satellite systems.
  47. Chen, Shao-Chun; O'Neill, Patrick; Rao, Bindu Rama; Lilley, Patrick, Pattern detection preprocessor in an electronic device update generation system.
  48. Pentikainen Heimo,FIX ; Sarpola Jussi,FIX ; Suhonen Aki,FIX ; Vimpari Markku,FIX, Procedure and system for ensuring emergency communication in a wireless local loop environment.
  49. Proctor, Jr., James A., Receiving and transmitting reverse link signals from subscriber units.
  50. Lee Hyun Goo,KRX, Reduction method of successive hard handoffs between base stations in code division multiple access (CDMA) mobile communication system.
  51. Hunzinger,Jason F., Retry limits for connection rescue procedures in telecommunication systems.
  52. Judd,Mano D.; Maca,Gregory A.; Roper,Joel C., Shared tower system for accomodating multiple service providers.
  53. Shellhammer, Stephen J.; Van Nee, Richard, Spectrum sensing of bluetooth using a sequence of energy detection measurements.
  54. Pennock, James D.; Urry, Robin M.; Hanson, John D., System for customizing musical effects using digital signal processing techniques.
  55. Liu, Chunmei; Vivanco, Daniel; Sitaram, Krishna, Systems and methods for determining an access node for a wireless device.
  56. Kondo Seiji,JPX, Terminal assisted handoff mobile communication system in which improvement is carried out as regards a handoff system.
  57. Yu, Zhi-Zhong; Dhanda, Mungal Singh, Time shifting of co-channel data transmissions to reduce co-channel interference.
  58. Yu, Zhi-Zhong; Dhanda, Mungal Singh, Time shifting of co-channel data transmissions to reduce co-channel interference.
  59. Hede책s,Urban, Transaction system.
  60. Cassapakis, Chris; Rao, Bindu Rama, Updating an electronic device with update agent code.
  61. Proctor, James A.; Alapuranen, Pertti O., Use of orthogonal or near orthogonal codes in reverse link.
  62. Proctor, Jr., James A.; Alapuranen, Pertti O., Use of orthogonal or near orthogonal codes in reverse link.
  63. Motta, Giovanni; Marolia, Sunil; O'Neill, Brian; Slyz, Marko, User experience and dependency management in a mobile device.
  64. Motta, Giovanni; Marolia, Sunil; O'Neill, Brian; Slyz, Marko, User experience and dependency management in a mobile device.

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