Method and system for generating an identity identifier of a key
First Claim
1. A method for generating an identifier of a key, comprising:
- when a user equipment (UE) transfers from an evolved UMTS terrestrial radio access network (EUTRAN) to a universal terrestrial radio access network (UTRAN), a mobility management entity (MME) and the UE generating a key set identifier of a UTRAN system by mapping a key set identifier of an access security management entity key; and
the MME sending a serving GPRS support node (SGSN) the key set identifier of the UTRAN system, along with a ciphering key and an integrity key of the system.
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Abstract
A method for generating an identifier of a key, comprises that: when a user equipment (UE) transfers from an evolved UMTS terrestrial radio access network (EUTRAN) to a universal terrestrial radio access network (UTRAN) or a global system for mobile communications (GSM), or an enhanced data rate for GSM evolved radio access network (GERAN), an identifier of a system key after transfer is generated by mapping an identifier KSIASME for an access security management entity, and a mobile management entity generates an identifier of a ciphering key (CK) and an integrity key (IK) by mapping the KSIASME, and then sends the generated identifier to a serving GPRS support node (SGSN), when the UE transfers from the EUTRAN to the UTRAN, the SGSN stores the ciphering key, the integrity key and the identifier thereof, and when the UE transfers from the EUTRAN to the GERAN, the SGSN assigns the value of the identifier of the ciphering key and the integrity key to an identifier of a ciphering key of the GERAN.
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Citations
36 Claims
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1. A method for generating an identifier of a key, comprising:
when a user equipment (UE) transfers from an evolved UMTS terrestrial radio access network (EUTRAN) to a universal terrestrial radio access network (UTRAN), a mobility management entity (MME) and the UE generating a key set identifier of a UTRAN system by mapping a key set identifier of an access security management entity key; and
the MME sending a serving GPRS support node (SGSN) the key set identifier of the UTRAN system, along with a ciphering key and an integrity key of the system.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 23, 24, 25, 26, 27, 28, 29)
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10. A method for generating an identifier of a key, comprising:
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when a UE transfers from an EUTRAN to a global system for mobile communications (GSM) or an enhanced data rate for GSM evolution radio access network (GERAN), an MME generating an identifier of a ciphering key and an integrity key by mapping a key set identifier for an access security management entity, and sending the ciphering key, the integrity key and the identifier thereof to an SGSN; the SGSN assigning the value of the identifier of the ciphering key and the integrity key to an identifier of a ciphering key of the GSM or GERAN, that is, the sequence number of the ciphering key; and the UE generating the identifier of the ciphering key of the GSM or GERAN by mapping the key set identifier of the access security management entity key. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 30, 31, 32, 33, 34, 35, 36)
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19. A system for generating an identifier of a key, which is suitable for generating an identifier of a system key when a UE transfers from an EUTRAN to a UTRAN, comprising:
- a UE, a mobility management entity (MME) and a serving GPRS support node (SGSN), wherein;
the UE being used for mapping a key set identifier for an access security management entity into a key set identifier of a UTRAN system; the MME being used for mapping a key set identifier for the access security management entity into a key set identifier of the UTRAN system and sending the obtained identifier to the SGSN; the mapping mode being as follows;
the UE and the MME directly assign the value of the key set identifier of the UTRAN system to be that of the key set identifier of the access security management entity key, or to be the sum of the value of the key set identifier of the access security management entity key and a constant which is appointed by the UE and a network side. - View Dependent Claims (20)
- a UE, a mobility management entity (MME) and a serving GPRS support node (SGSN), wherein;
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21. A system for generating an identifier of a key, which is suitable for generating an identifier of a system key when a UE transfers from an EUTRAN to a GSM or GERAN, comprising:
- a UE, a mobility management entity (MME) and a serving GPRS support node (SGSN), wherein,
the UE being used for generating an identifier of a ciphering key of the GSM or GERAN by mapping a key set identifier for an access security management entity; the MME being used for generating an identifier of a ciphering key and an integrity key by mapping a key set identifier for the access security management entity, and sending the ciphering key, the integrity key and the identifier thereof to the SGSN; the SGSN being used for receiving the ciphering key, the integrity key and the identifier thereof which are sent by the MME, and assigning the value of the identifier of the ciphering key and the integrity key to the identifier of the ciphering key of the GSM or GERAN; the mapping generation mode being as follows;
the MME directly assigning the value of the identifier of the ciphering key and the integrity key to be that of the key set identifier of the access security management entity key, or to be the sum of the value of the key set identifier of the access security management entity key and a constant which is appointed by the UE and a network side, and the UE directly assigning the value of the identifier of the ciphering key of the GSM or GERAN to be that of the key set identifier of the access security management entity key, or to be the sum of the value of the key set identifier of the access security management entity key and a constant which is appointed by the UE and the network side. - View Dependent Claims (22)
- a UE, a mobility management entity (MME) and a serving GPRS support node (SGSN), wherein,
Specification