Nova Patents
CA2286300C

Mobile diversity handover and branch control

Abstract

When a network pages the temporary user mobile identifier of a mobilestation, the mobile station sends a response to the network. Next, the network checksthe authenticity of the user using a ciphering key, corresponding to the temporary usermobile identifier and a random number. If the temporary user mobile identifier isauthenticated, a normal incoming call acceptance procedure is executed. If the mobilestation is authenticated although the temporary user mobile identifier is wrong, thenetwork reassigns a new temporary user mobile identifier to the mobile station andstops the current communication. In communication, the network and the mobilestation mutually notify encipherment-onset time and negotiate about enciphermentmanner with each other. In addition, diversity handover is commenced upon a callattempt. Furthermore, if a branch replacement is necessary, the current branch isreplaced by new branches capable of executing the diversity handover. Additionally,when a new call occurs to or from the mobile station capable of treating a plurality ofcalls simultaneously, the mobile station uses the same branch structure and the samecommunication frequency band for all of calls. Additionally, when a new call occurs toor from the mobile station capable of treating a plurality of calls simultaneously, abranch structure and a communication frequency band, which can continue all of thecalls, are selected and used. Therefore, the mobile communications system is suitablefor transmission of various sorts of data in accordance with the development ofmultimedia.

CA2286300C, drawing sheet 1
Sheet 1 of 303

Term

Term ended

Expired 24 April 2018, 8.4 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

34 claims: 22 independent, 12 dependent

  1. 1
    CLAIMS 1. A method for controlling access links between a mobile station and a network, comprising:detecting a call attempt to or from a mobile station located at a position where the mobile station can communicate using diversity handover;and establishing, upon detection of the call, a plurality of branches between the network and the mobile station, the plurality of branches including a main branch and at least one auxiliary branch for additional use in order that the mobile station may communicate using diversity handover, thereby enabling the mobile station to commence communication using the plurality of branches.
  2. 6
    A mobile station comprising:radio communication means for radio communicating with a network;and communication control means for controlling said radio communication means, the communication control means establishing a plurality of branches between the network and said mobile station via the radio communication means upon receiving a 10 message from the network when no access link is established between the network and the mobile station, the message including a request for establishing the branches, thereby commencing communication using the plurality of branches.
  3. 9
    A base station controller comprising:communication means for communicating with a mobile station via a network;and communication control means for controlling communication with a mobile station, the communication control means establishing a plurality of branches between a network and a mobile station upon a call attempt to or from the mobile station at a location where the mobile station can communicate using diversity handover, the plurality of branches including a main branch and at least one auxiliary branch for additional use in order that the mobile station may communicate using diversity handover.
  4. 12
    A base station comprising:radio communication means for communicating with a mobile station;and communication control means for controlling communication with a mobile station, the communication control means establishing a plurality of branches between the base station and the mobile station according to an instruction from a base station controller upon a call attempt to or from the mobile station at a location where the mobile station can communicate by means of intra-cell diversity handover, enabling the mobile station and the base station to communicate with each other using the plurality of branches, the plurality of branches including a main branch and at least one auxiliary branch for additional use in order that the mobile station may communicate by means of intra-cell diversity handover.
  5. 13
    A method for controlling a branch replacement, comprising:determining if a mobile station is entering an area where a frequency used for communication is different from a frequency currently being used by the mobile station for communication, and if the mobile station can commence communicating using diversity handover if branch replacement is carried out;and replacing, upon affirmative result of the determination, at least a current branch between a network and a mobile station with a plurality of branches necessary for communication using diversity handover, thereby enabling the mobile station to commence the diversity handover.
  6. 15
    A mobile station comprising:radio communication means for radio communicating with a network;and communication control means for controlling communication, the communication control means replacing, via the radio communication means, at least a current branch between a network and the mobile station with a plurality of branches necessary for communication using diversity handover when the mobile station enters- an area where a frequency used for communication is different from a frequency currently being used by the mobile station for communication and when the mobile station can commence communicating using diversity handover branches if branch replacement is carried out, thereby commencing diversity handover.
  7. 16
    A base station controller comprising:communication means for communicating with a mobile station;and communication control means for controlling communication with a mobile station, the communication control means replacing at least a current branch between a network and a mobile station with a plurality of branches necessary for communication using diversity handover when a mobile station enters an area where a frequency used for communication is different from a frequency currently being used by the mobile station for communication and when it is recognized that the mobile station can commence communicating using diversity handover if the branch replacement is carried out, thereby enabling the mobile station to commence diversity handover.
  8. 19
    A base station comprising:radio communication means for radio communicating with a mobile station;and communication control means for controlling communication with a mobile station, the communication control means replacing a branch for a mobile station and adding at least one auxiliary branch for the mobile station according to instructions
  9. 20
    20 contained in a message once the base station receives the message from a base station controller, the message including an instruction to carry out branch replacement and an instruction to add at least one auxiliary branch for additional use in order to communicate using diversity handover, thereby commencing the intra-cell diversity handover. CA 02286300 2004-06-15 381 20. A branch controlling method for a mobile station capable of treating a plurality of calls simultaneously, comprising:detecting a new call while the mobile station is engaged in an existent call;controlling, upon detection of the new call, at least one of branch structures for 5 both of the calls or at least one of communication frequency bands for both of the calls, so that the branch structures are the same as each other and the communication frequency bands are the same as each other.
  10. 21
    A branch controlling method for a mobile station capable of treating a plurality of 10 calls simultaneously, comprising:detecting a new call while the mobile station is engaged in an existent call;controlling, upon detection of the new call, a branch structure and a communication frequency band, so that those used for the existent call are assigned to the new call.
  11. 22
    A mobile station capable of treating a plurality of calls simultaneously, comprising:radio communication means for radio communicating with a network;and communication control means for controlling communication with the network, 20 the communication control means, upon detecting that a new call occurs while the mobile station is engaged in an existent call, using the same branch structure and communication frequency band as those used for the existent call, for the new call, in accordance with an instruction from a network. CA 02286300 2004-06-15 382
  12. 23
    A base station controller adapted for a mobile station capable of treating a plurality of calls simultaneously, comprising:communication means for communicating with a mobile station;and communication control means for controlling communication with a mobile station, the communication control means, upon detecting that a new call occurs while the mobile station is engaged in an existent call, controlling at least one of branch structures for both of the calls or at least one of communication frequency bands for both of the calls, so that the branch structures are the same as each other and the communication frequency bands are the same as each other.
  13. 24
    A base station controller adapted for a mobile station capable of treating a plurality of calls simultaneously, comprising:communication means for communicating with a mobile station;and communication control means for controlling communication with a mobile station, the communication control means, upon detecting that a new call occurs while the mobile station is engaged in an existent call, assigning a branch structure and a communication frequency band the same as those for the existent call, to the new call.
  14. 25
    A branch controlling method adapted for a mobile station capable of treating a plurality of calls simultaneously, comprising:detecting that a new call occurs while the mobile station is engaged in an existent call and it is impossible to assign a branch structure or a communication frequency band the same as those for the existent call, to the new call;selecting, upon detection of the new call, another branch structure or another communication frequency band which can continue both of the existent and new calls;and CA 02286300 2004-06-15 383 assigning the selected branch structure or communication frequency band to both of the existent and new calls.
  15. 27
    A mobile station capable of treating a plurality of calls simultaneously, comprising:radio communication means for radio communicating with a network;and communication control means for controlling communication, the communication control means, upon detecting that a new call occurs while the mobile station is engaged in an existent call and it is impossible to assign a branch structure or a communication frequency band the same as those for the existent call, to the new call, assigning another branch structure or another communication frequency band, which can continue both of the existent and new calls, to both of the existent and new calls in accordance with an instruction from a network.
  16. 28
    A base station controller adapted for a mobile station capable of treating a plurality of calls simultaneously, comprising:communication means for communicating with a mobile station;and communication control means for controlling communication with a mobile station, the communication control means, upon detecting that a new call occurs while the mobile station is engaged in an existent call and it is impossible to assign a branch structure or a communication frequency band the same as those for the existent call, to the new call, selecting another branch structure or another communication frequency band CA 02286300 2004-06-15 384 which can continue both of the existent and new calls, and assigning the selected branch structure or communication frequency band to both of the existent and new calls.
  17. 29
    A branch controlling method adapted for a mobile station, comprising:selecting, upon detecting that a trigger of handover occurs in the mobile station which is engaged in a plurality of calls, a branch structure or a communication frequency band which can continue all of the calls;and assigning the selected branch structure or communication frequency band to all of the calls.
  18. 30
    A mobile station capable of treating a plurality of calls simultaneously, comprising:radio communication means for radio communicating with a network;and communication control means for controlling communication, the communication control means, upon detecting that a trigger of handover occurs to the mobile station which is engaged in a plurality of calls, according to an instruction from a network, altering a branch structure or a communication frequency band for all of the calls to a new branch structure or a new communication frequency band for all of the calls.
  19. 31
    A base station controller adapted for a mobile station, comprising:communication means for communicating with a mobile station;and communication control means for controlling communication, the communication control means, upon detecting that a trigger of handover occurs in the mobile station which is engaged in a plurality of calls, selecting a branch structure or a communication frequency band which can continue all of the calls, and assigning the selected branch structure or communication frequency band to all of the calls. CA 02286300 2004-06-15 385
  20. 32
    A branch controlling method adapted for a mobile station, comprising:detecting that a trigger of handover occurs in the mobile station which is engaged in a plurality of calls when there is not a branch structure which can continue all of the calls in relation to the mobile station or when there is not a communication frequency band which can continue all of the calls in relation to the mobile station, selecting, upon detection of the trigger of handover, another branch structure or another communication frequency band which can continue from among all of the calls a plurality of calls having high priority;releasing the other call or calls;and assigning the selected branch structure and communication frequency band to the priority calls.
  21. 33
    A mobile station comprising:radio communication means for radio communicating with a network;and communication control means for controlling communication, the communication control means, upon detecting that a trigger of handover to the mobile station which is engaged in a plurality of calls occurs and when there is not a branch structure which can continue all of the calls in relation to the mobile station or when there is not a communication frequency band which can continue all of the calls in relation to the mobile station, releasing, according to an instruction from a network, a call or calls being low in priority;and assigning a branch structure and a communication frequency band selected by the network to a plurality of calls having high priority. CA 02286300 2004-06-15 386
  22. 34
    A base station controller adapted for a mobile station, comprising:communication means for communicating with a mobile station;communication control means for controlling communication, the communication control means, upon detecting that a trigger of handover to the mobile station which is 5 engaged in a plurality of calls occurs and when there is not a branch structure which can continue all of the calls in relation to the mobile station or there is not a communication frequency band which can continue all of the calls in relation to the mobile station, selecting another branch structure and another communication frequency band which can continue a plurality of calls having high priority among the calls;releasing the other call 10 or calls;and assigning the selected branch structure and communication frequency band to the calls having high priority. CA 02286300 1999-10-05 DEMANDES OU BREVETS VOLUMINEUX * LA PRÉSENTE PARTIE DE CETTE DEMANDE OU CE BREVET COMPREND PLUS D'UN TOME. CECI EST LE TOME t ~~DE â. NOTE: Pour les tomes additionels. veuillez contacter le Bureau canadien des brevets JUMBO APPLICATIONS/PATENTS THIS SECTION OF THE APPUCATION/PATENT CONTAINS MORE THAN ONE VOLUME , Z’THIS IS VOLUME _ OF _ NOTE: For additional volumes please contact thé Canadian Patent Office CA 02286300 1999-10-05 F0220/2551 1/515 evice CA 02286300 1999-10-05 F0220/2551 2/515
Independent claims22