METHODS AND DEVICES, WHICH ENABLE TO DETERMINE IF A HANDOVER OF A COMMUNICATION IN WHICH A MOBILE TERMINAL IS INVOLVED HAS TO BE EXECUTED FROM A FIRST BASE STATION TO A SECOND BASE STATION

• US 20090054065A1
• Filed: 08/01/2008
• Published: 02/26/2009
• Est. Priority Date: 08/20/2007
• Status: Abandoned Application

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Voyer, Nicolas, Bonneville, Herve
• Application Number:
  US12/184,539
• Publication Number:
  US 20090054065A1
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04L 63/101 Access control lists [ACL]
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 12/75 Temporary identity
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions

Abstract

The present invention concerns methods and devices for enabling the determination, if a handover of a communication in which a first mobile terminal is involved has to be executed between base stations in an area managed by an entity of a wireless cellular telecommunication network. The entity:

• • allocates a temporary identifier to the first mobile terminal,
  • obtains a list of base stations through which a communication of the first mobile terminal has been authorized to go through,
  • transfers, to each base station identified in the list of base stations, a first message comprising at least the temporary identifier of the first mobile terminal.

Claims

1. Method for determining if a handover of a communication in which a first mobile terminal is involved has to be executed from a first base station to a second base station of a wireless cellular telecommunication network, characterised in that the method comprises the steps executed by the second base station of:

receiving a first message requesting to hand over the communication in which the first mobile terminal is involved from the first base station to the second base station, the message comprising a temporary identifier allocated to the first mobile terminal,

checking if the temporary identifier comprised in the first message is comprised in a list of temporary identifiers of mobile terminals for which the handover of communications in which they are involved is authorised,

transferring a second message to the first base station, the second message being representative of an agreement for executing the handover of the communication if the temporary identifier comprised in the first message is comprised in the list of temporary identifiers or the second message being representative of a refusal for executing the handover of the communication if the temporary identifier comprised in the first message is not comprised in a list of temporary identifiers.

2. Method according to claim 1, characterised in that the list of temporary identifiers of mobile terminals for which the handover of communications in which they are involved is authorised is composed of temporary identifiers of mobile terminals for which a call establishment through the second base station has already been allowed.

3. Method according to claim 2, characterised in that the method comprises further steps of:

receiving from a second mobile terminal a third message requesting an establishment of a communication with a remote telecommunication device through the second base station, the third message comprising a temporary identifier allocated to the second mobile terminal,

checking if the establishment of the communication is authorised by an entity of the wireless cellular telecommunication network,

inserting the identifier of the second mobile terminal in the list of temporary identifiers of mobile terminals if the establishment of the communication is authorised.

4. Method according to claim 3, characterised in that the method comprises further steps of:

receiving from the entity a fourth message comprising another list of temporary identifiers of mobile terminals,

replacing the list of temporary identifiers of mobile terminals by the other list of temporary identifiers of mobile terminals comprised in the fourth message.

5. Method according to claim 3, characterised in that the method comprises further steps of:

receiving from the entity a fourth message comprising at least one pair of temporary identifiers of mobile terminals,

replacing in the list of temporary identifiers of mobile terminals, each temporary identifier that corresponds to the first element of a pair by the second element of the pair.

6. Method according to claim 3, characterised in that the method comprises further steps of:

receiving from the entity a fourth message comprising at least one command and at least one temporary identifier,

adding in the list of temporary identifiers of mobile terminals or suppressing from the list of temporary identifiers of mobile terminals, the at least one temporary identifier comprised in the fourth message according to the at least one command.

7. Method according to any of the claims 3 to 6, characterised in that the second base station memorises a list of univocal identifiers of mobile terminals and in that the method further comprises the steps of:

transferring a fifth message to the entity comprising the list of univocal identifiers of mobile terminals,

receiving in response to the fifth message a sixth message comprising a list of temporary identifiers allocated to the mobile terminals of which univocal identifiers are comprised in the fifth message.

14. Computer program which can be directly loadable into a programmable device, comprising instructions or portions of code for implementing the steps of the method according to claims 1 to 7, when said computer program is executed on a programmable device.

8. Method for enabling the determination, if a handover of a communication in which a first mobile terminal is involved has to be executed between base stations in an area managed by an entity of a wireless cellular telecommunication network, characterised in that the method comprises the steps executed by the entity of:

allocating a temporary identifier to the first mobile terminal,

obtaining a list of base stations through which a communication of the first mobile terminal has been authorized to go through,

transferring, to each base station identified in the list of base stations a first message comprising at least the temporary identifier of the first mobile terminal.

9. Method according to claim 8, characterised in that the method comprises further steps of:

receiving, from a base station, a second message requesting an establishment through the base station of a communication of the first mobile terminal is involved, the second message comprising a temporary identifier allocated to the first mobile terminal,

accepting the establishment of the communication through the base station,

modifying the list of base stations through which a communication of the first mobile terminal has been authorized to go through.

10. Method according to claim 8 or 9 characterised in that the entity memorises, for each base station, a list of univocal identifiers of mobile terminals for which the handover, from another base station to the base station, of communications in which the mobile terminals are involved is authorised, and in that the method comprises further steps of:

transferring a third message to the base station when the list of univocal identifiers of mobile terminals is modified, the third message comprising a list of temporary identifiers of mobile terminals for which the handover of communications from another base station to the base station in which they are involved is authorised.

11. Method according to claim 10, characterised in that the list of univocal identifiers of mobile terminals for which the handover of communication from another base station to the base station in which the mobile terminal are involved is authorised is received from the base station and in that each temporary identifier of a mobile terminal in the list comprised in the third message has a position in the list comprised in the third message which is different from the position of the univocal identifier of the mobile terminal in the received list of univocal identifiers.

15. Computer program which can be directly loadable into a programmable device, comprising instructions or portions of code for implementing the steps of the method according to claims 8 to 11, when said computer program is executed on a programmable device.

12. Device for determining if a handover of a communication in which a first mobile terminal is involved has to be executed from a first base station to a second base station of a wireless cellular telecommunication network, characterised in that the device is included in the second base station and the device comprises:

means for receiving a first message requesting to hand over the communication in which the first mobile terminal is involved from the first base station to the second base station, the message comprising a temporary identifier allocated to the first mobile terminal,

means for checking if the temporary identifier comprised in the first message is comprised in a list of temporary identifiers of mobile terminals for which the handover of communications in which they are involved is authorised,

means for transferring a second message to the first base station, the second message being representative of an agreement for executing the handover of the communication if the temporary identifier comprised in the first message is comprised in the list of temporary identifiers or the second message being representative of a refusal for executing the handover of the communication if the temporary identifier comprised in the first message is not comprised in a list of temporary identifiers.

13. Device for enabling the determination, if a handover of a communication in which a first mobile terminal is involved has to be executed between base stations in an area managed by an entity of a wireless cellular telecommunication network, characterised in that the device is included in the entity and comprises:

means for allocating a temporary identifier to the first mobile terminal,

means for obtaining a list of base stations through which a communication of the first mobile terminal has been authorized to go through,

means for transferring, to each base station identified in the list of base stations, a first message comprising at least the temporary identifier of the first mobile terminal.