| (11) | EP 2 685 751 B1 |
(12) | EUROPEAN PATENT SPECIFICATION |
|
|
(54) | HANDOVER METHOD, BASE STATION, USER EQUIPMENT AND MOBILITY MANAGEMENT ENTITY WEITERREICHUNGSVERFAHREN, BASISSTATION, BENUTZERVORRICHTUNG UND MOBILITÄTSVERWALTUNGSEINHEIT PROCÉDÉ DE TRANSFERT INTERCELLULAIRE, STATION DE BASE, ÉQUIPEMENT UTILISATEUR ET ENTITÉ DE GESTION DE MOBILITÉ |
|
| |||||||||||||||||||||||||||||||
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
TECHNICAL FIELD
BACKGROUND
SUMMARY
obtaining, by a base station, an algorithm used by a user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and
sending, by the base station, a handover command to the user equipment, where the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count for the user equipment to calculate a cipher key and an integrity key according to the four least significant bits of the downlink non-access stratum count;
wherein the obtaining, by the base station, the algorithm used by the user equipment in the universal mobile telecommunication system comprises:
sending, by the base station, a handover request message to a radio network controller, wherein the handover request message carries a security capability of the user equipment in the universal mobile telecommunication system, and the security capability of the user equipment in the universal mobile telecommunication system is obtained from an S1 application protocol message sent by a mobility management entity when the user equipment accesses a network, wherein the S1 application protocol message carries the security capability of the user equipment in the universal mobile telecommunication system; and
receiving, by the base station, a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
obtaining, by a base station, an algorithm used by a user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and
sending, by the eNB, a handover command to the user equipment, wherein the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count;
receiving, by the user equipment, the handover command sent by the base station; and calculating, by the user equipment, a cipher key and an integrity key according to the four least significant bits of the downlink non-access stratum count;
wherein the obtaining, by the base station, the algorithm used by the user equipment in the universal mobile telecommunication system comprises:sending, by the base station, a handover request message to a radio network controller, wherein the handover request message carries a security capability of the user equipment in the universal mobile telecommunication system, and the security capability of the user equipment in the universal mobile telecommunication system is obtained from an S1 application protocol message sent by a mobility management entity when the user equipment accesses a network, wherein the S1 application protocol message carries the security capability of the user equipment in the universal mobile telecommunication system; and
receiving, by the base station, a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
obtaining, by an evolved node B, eNB, an algorithm used by a user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and
sending, by the base station, a handover command to the user equipment, wherein the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count for the user equipment to calculate a cipher key and an integrity key according to the four least significant bits of the downlink non-access stratum count;
before obtaining, by the eNB, the algorithm used by the user equipment in the universal mobile telecommunication system, the method further including:
sending, by a mobility management entity, an S1 application protocol message when the user equipment accesses a network, wherein the S1 application protocol message carries a security capability of the user equipment in the universal mobile telecommunication system;
wherein the obtaining, by the base station, the algorithm used by the user equipment in the universal mobile telecommunication system comprises:
sending a handover request message to a radio network controller, wherein the handover request message carries the security capability of the user equipment in the universal mobile telecommunication system; and
receiving a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
an obtaining module, configured to obtain an algorithm used by a user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count;
a sending module, configured to send a handover command to the user equipment being handed over from a long term evolution network to the universal mobile telecommunication system network, where the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count that are obtained by the obtaining module; and
a receiving module, configured to receive an S1 application protocol message sent by a mobility management entity, wherein the S1 application protocol message carries a security capability of the user equipment in the universal mobile telecommunication system;
wherein the obtaining module comprises:
a first sending submodule, configured to send a handover request message to a radio network controller, wherein the handover request message carries the security capability of the user equipment in the universal mobile telecommunication system; and
a first receiving submodule, configured to receive a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
the base station is configured to: obtain an algorithm used by the user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and send a handover command to the user equipment, wherein the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count;
the user equipment is configured to receive the handover command sent by the base station; and calculate a cipher key and an integrity key according to the four least significant bits of the downlink non-access stratum count;
the base station is configured to obtain the algorithm used by the user equipment in the universal mobile telecommunication system as follows:
send a handover request message to a radio network controller, wherein the handover request message carries a security capability of the user equipment in the universal mobile telecommunication system, and the security capability of the user equipment in the universal mobile telecommunication system is obtained from an S1 application protocol message sent by a mobility management entity when the user equipment accesses a network, wherein the S1 application protocol message carries the security capability of the user equipment in the universal mobile telecommunication system; and
receive a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
the base station is configured to obtain an algorithm used by a user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and send a handover command to the user equipment, wherein the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count for the user equipment to calculate a cipher key and an integrity key according to the four least significant bits of the downlink non-access stratum count;
the mobility management entity is configured to send an S1 application protocol message when the user equipment accesses a network, wherein the S1 application protocol message carries a security capability of the user equipment in the universal mobile telecommunication system;
the base station is configured to obtain the algorithm used by the user equipment in the universal mobile telecommunication system as follows:
send a handover request message to a radio network controller, wherein the handover request message carries the security capability of the user equipment in the universal mobile telecommunication system; and
receive a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
a command receiving module, configured to receive a handover command sent by a base station, where the handover command carries an algorithm used by the user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and
a calculation module, configured to calculate a cipher key and an integrity key according to the four least significant bits of the downlink non-access stratum count that are received by the command receiving module.
a first message receiving module, configured to receive a handover request message sent by a base station, where the handover request message carries instruction information for instructing the mobility management entity to send four least significant bits of a downlink non-access stratum count; and
a significant bit sending module, configured to send the four least significant bits of the downlink non-access stratum count to the base station according to the instruction information received by the first message receiving module.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a flowchart of a handover method according to an embodiment of the present invention;
FIG. 2 is a flowchart of a handover method according to another embodiment of the present invention;
FIG. 3 is a flowchart of a handover method according to still another embodiment of the present invention;
FIG. 4 is a flowchart of a handover method according to yet another embodiment of the present invention;
FIG. 5 is a flowchart of a handover method according to still yet another embodiment of the present invention;
FIG. 6 is a flowchart of a handover method according to still yet another embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a base station according to another embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a mobility management entity according to an embodiment of the present invention; and
FIG. 11 is a schematic structural diagram of a mobility management entity according to another embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS
101. Obtain an algorithm used by a user equipment (User Equipment; hereinafter referred to as UE) in a UMTS and four least significant bits (4 Least Significant Bits; hereinafter referred to as 4LSB) of a downlink non-access stratum count (Non-Access Stratum Count; hereinafter referred to as NAS Count).
102. Send a handover command to the UE, where the handover command carries the algorithm used by the UE in the UMTS and the 4LSB of the NAS Count.
201. An eNB initiates a handover process.
202. The eNB sends a handover request (Handover Request) message to the RNC, where the handover request message carries a security capability of a UE in a UMTS.
In this embodiment, when a UE accesses a network via an LTE system, the UE sends security capabilities of the UE in an LTE system, a UMTS, and a GSM to a core network node MME. Therefore, in order to enable the eNB to obtain the security capabilities of the UE in the UMTS and the GSM, an S1AP message between the MME and the eNB may be extended to carry the security capabilities of the UE in the UMTS and the GSM. Specifically, when the UE accesses the network, the MME can send the security capabilities of the UE in the UMTS and the GSM together to the eNB in the S1AP message sent to the eNB.
203. After receiving the handover request message, the RNC performs operations such as quality of service (Quality of Service; hereinafter referred to as QoS) mapping and resource allocation, and sends a handover request acknowledgement (Handover Request Acknowledgement; hereinafter referred to as Handover Request ACK) message to the eNB, where the handover request acknowledgement message carries an algorithm used by the UE in the UMTS.
Specifically, the RNC may select the algorithm used by the UE in the UMTS according to the security capability of the UE in the UMTS that is carried in the handover request message, and send the selected algorithm to the eNB in the handover request acknowledgement message.
204. The eNB performs handover decision.
205. The eNB sends the handover request message to the MME, where the handover request message carries instruction information for instructing the MME to send 4LSB of a downlink NAS Count.
206. After receiving the instruction information, the MME sends the 4LSB of the downlink NAS Count to the eNB.
207. After receiving the 4LSB sent by the MME, the eNB sends a handover command (Handover Command) message to the UE, where the handover command message carries the algorithm used by the UE in the UMTS and the 4LSB of the downlink NAS Count.
In this embodiment, the eNB can send the handover command message to the UE after receiving the 4LSB of the downlink NAS Count, rather than waiting for receiving a handover request response message sent by the MME, thereby saving handover time.
208. The MME sends a relocation request (Relocation Request) message to a core network (Core Network; hereinafter referred to as CN), and performs a series of relocation operations with the CN.
209. The MME sends a handover request response (Handover Request Response) message to the eNB.
210. The UE is handed over to the RNC. The process of handover from the LTE system to the UMTS ends.
301. An eNB initiates a handover process.
302. The eNB sends a handover request message to an RNC.
303. After receiving the handover request message, the RNC performs operations such as QoS mapping and resource allocation, and sends a handover request acknowledgement message to the eNB.
304. The eNB performs handover decision.
305. The eNB sends a handover request message to an MME.
306. The MME sends a relocation request message to a CN, and performs a series of relocation operations with the CN.
Specifically, the MME may send a forward relocation request message to a core network node SGSN, where the forward relocation request message carries a security capability of a UE in a UMTS; the SGSN is short for serving general packet radio service support node (Serving General Packet Radio Service Support Node). The security capability of the UE in the UMTS is sent by the UE to the core network node MME when the UE accesses a network via an LTE system; then the SGSN sends the security capability of the UE in the UMTS to the RNC by the relocation request message, and the RNC selects an algorithm used by the UE in the UMTS according to the security capability of the UE in the UMTS; then the RNC sends the algorithm used by the UE in the UMTS to the SGSN in a relocation response message, and finally the SGSN sends the algorithm used by the UE in the UMTS to the MME by the relocation response message.
307. The MME sends a handover request response message to the eNB, where the handover request response message carries the algorithm used by the UE in the UMTS and the 4LSB of the downlink NAS Count.
308. The eNB sends a handover command message to the UE, where the handover command message carries the algorithm used by the UE in the UMTS and the 4LSB of the downlink NAS Count.
The eNB can send the handover command message to the UE only after receiving the 4LSB of the downlink NAS Count sent by the MME. Therefore, in this embodiment, the eNB is required to send the handover command message to the UE after receiving the handover request response message sent by the MME.
309. The UE is handed over to the RNC. The process of handover from the LTE system to the UMTS ends.
401. A UE receives a handover command sent by a base station, where the handover command carries an algorithm used by the UE in a UMTS and 4LSB of a downlink NAS Count.
402. The UE calculates a CK and an IK according to the 4LSB of the downlink NAS Count.
501. An MME receives a handover request message sent by a base station, where the handover request message carries instruction information for instructing the MME to send 4LSB of a downlink NAS Count.
502. The MME sends the 4LSB of the downlink NAS Count to the base station according to the instruction information.
601. An MME receives a handover request message sent by a base station, where the handover request message carries an NAS Count generated by the base station.
602. The MME calculates a CK and an IK according to the NAS Count that is generated by the base station and is carried in the handover request message.
an obtaining module 71, configured to obtain an algorithm used by a UE in a UMTS and 4LSB of a downlink NAS Count; and
a sending module 72, configured to send a handover command to the UE, where the handover command carries the algorithm used by the UE in the UMTS and the 4LSB of the downlink NAS Count that are obtained by the obtaining module 71.
a receiving module 73, configured to receive an S1AP message sent by an MME, where the S1AP message carries a security capability of a UE in a UMTS.
a first sending submodule 711, configured to send a handover request message to an RNC, where the handover request message carries the security capability of the UE in the UMTS; and
a first receiving submodule 712, configured to receive a handover request acknowledgement message sent by the RNC, where the handover request acknowledgement message carries the algorithm used by the UE in the UMTS, and the algorithm used by the UE in the UMTS is selected by the RNC according to the security capability.
the first receiving submodule 712 may further receive the 4LSB of the downlink NAS Count that is sent by a mobility management entity according to the instruction information.
a monitoring submodule 713, configured to monitor and save the downlink NAS Count;
a generating submodule 714, configured to generate a NAS Count according to the downlink NAS Count saved by the monitoring submodule 713; and
a significant bit obtaining submodule 715, configured to obtain the 4LSB of the NAS Count generated by the generating submodule 714.
a command receiving module 91, configured to receive a handover command sent by a base station, where the handover command carries an algorithm used by the UE in a UMTS and 4LSB of a downlink NAS Count; and
a calculation module 92, configured to calculate a CK and an IK according to the 4LSB of the downlink NAS Count received by the command receiving module 91.
a first message receiving module 1001, configured to receive a handover request message sent by a base station, where the handover request message carries instruction information for instructing the MME to send 4LSB of a downlink NAS Count; and
a significant bit sending module 1002, configured to send the 4LSB of the downlink NAS Count to the base station according to the instruction information received by the first message receiving module 1001.
a first key calculation module 1003, configured to calculate a CK and an IK according to a new NAS Count when the instruction information received by the first message receiving module 1001 for instructing the MME to send the 4LSB of the downlink NAS Count is 4LSB of the new NAS Count and the handover request message further carries the new NAS Count, where the new NAS Count is generated by the base station according to a monitored and saved downlink NAS Count.
a second message receiving module 1101, configured to receive a handover request message sent by a base station, where the handover request message carries an NAS Count generated by the base station; and
a second key calculation module 1102, configured to calculate a CK and an IK according to the NAS Count generated by the base station and carried in the handover request message that is received by the second message receiving module 1101.
obtaining (101), by a base station, an algorithm used by a user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and
sending (102), by the base station, a handover command to the user equipment, wherein the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count for the user equipment to calculate a cipher key and an integrity key according to the four least significant bits of the downlink non-access stratum
count;
characterized in that obtaining (101), by the base station, the algorithm used by the user equipment in the universal mobile telecommunication system comprises:
sending (202, 302), by the base station, a handover request message to a radio network controller, wherein the handover request message carries a security capability of the user equipment in the universal mobile telecommunication system, and the security capability of the user equipment in the universal mobile telecommunication system is obtained from an S1 application protocol message sent by a mobility management entity when the user equipment accesses a network, wherein the S1 application protocol message carries the security capability of the user equipment in the universal mobile telecommunication system; and
receiving (203, 303), by the base station, a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
sending (205, 305) a handover request message to the mobility management entity, wherein the handover request message carries instruction information for instructing the mobility management entity to send the four least significant bits of the downlink non-access stratum count; and
receiving (206) the four least significant bits of the downlink non-access stratum count sent by the mobility management entity according to the instruction information.
monitoring and saving the downlink non-access stratum count, and generating a new non-access stratum count according to the saved downlink non-access stratum count; and
obtaining four least significant bits of the new non-access stratum count.
determining, by the user equipment, a non-access stratum count used by a mobility management entity, according to the four least significant bits of the downlink non-access stratum count that are carried in the handover command and a downlink non-access stratum count saved by the user equipment; and
calculating, by the user equipment, the cipher key and the integrity key, according to the non-access stratum count used by the mobility management entity and a root key.
sending, by the mobility management entity, the S1 application protocol message when the user equipment accesses the network.
receiving (501), by the mobility management entity, a handover request message sent by the base station, wherein the handover request message carries instruction information for instructing the mobility management entity to send the four least significant bits of the downlink non-access stratum count; and
sending (502), by the mobility management entity, the four least significant bits of the downlink non-access stratum count to the base station according to the instruction information.
calculating (602), by the mobility management entity, the cipher key and the integrity key according to the new non-access stratum count.
an obtaining module (71), configured to obtain an algorithm used by a user equipment in a universal mobile telecommunication system and four least significant bits of a downlink non-access stratum count; and
a sending module (72), configured to send a handover command to the user equipment being handed over from a long term evolution network to the universal mobile telecommunication system network, wherein the handover command carries the algorithm used by the user equipment in the universal mobile telecommunication system and the four least significant bits of the downlink non-access stratum count that are obtained by the obtaining module (71);
characterized by, further comprising:
a receiving module (73), configured to receive an S1 application protocol message sent by a mobility management entity, wherein the S1 application protocol message carries a security capability of the user equipment in the universal mobile telecommunication system;
wherein the obtaining module (71) comprises:
a first sending submodule (711), configured to send a handover request message to a radio network controller, wherein the handover request message carries the security capability of the user equipment in the universal mobile telecommunication system; and
a first receiving submodule (712), configured to receive a handover request acknowledgement message sent by the radio network controller, wherein the handover request acknowledgement message carries the algorithm used by the user equipment in the universal mobile telecommunication system, and the algorithm used by the user equipment in the universal mobile telecommunication system is selected by the radio network controller according to the security capability.
a monitoring submodule (713), configured to monitor and save the downlink non-access stratum count;
a generating submodule (714), configured to generate a new non-access stratum count according to the downlink non-access stratum count saved by the monitoring submodule (713); and
a significant bit obtaining submodule (715), configured to obtain 4LSB of the new non-access stratum count generated by the generating submodule (714).
Erhalten (101) durch eine Basisstation eines durch eine Benutzervorrichtung in einem universellen Mobilfunk-Telekommunikationssystem benutzten Algorithmus und vier niedrigstwertiger Bit einer Nichtzugangsschichtzählung auf der Abwärtsstrecke; und
Senden (102) durch die Basisstation eines Weiterreichungsbefehls zu der Benutzervorrichtung, wobei der Weiterreichungsbefehl den durch die Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem benutzten Algorithmus und die vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärtsstrecke für die Benutzervorrichtung zum Berechnen eines Ziffernschlüssels und eines Integritätsschlüssels gemäß den vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärtsstrecke führt;
dadurch gekennzeichnet, dass Erhalten (101) durch die Basisstation des durch die Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem benutzten Algorithmus umfasst:
Senden (202, 302) durch die Basisstation einer Weiterreichungsanfragenachricht zu einer Funknetzsteuerung, wobei die Weiterreichungsanfragenachricht eine Sicherheitsfähigkeit der Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikations system führt, und die Sicherheitsfähigkeit der Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem aus einer durch eine Mobilitätsverwaltungseinheit gesendeten S1-Anwendungsprotokollnachricht erhalten wird, wenn die Benutzervorrichtung auf ein Netz zugreift, wobei die S 1-Anwendungsprotokollnachricht die Sicherheitsfähigkeit der Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem führt; und
Empfangen (203, 303) durch die Basisstation einer durch die Funknetzsteuerung gesendeten Weiterreichungsanfragebestätigungsnachricht, wobei die Weiterreichungsanfragebestätigungsnachricht den durch die Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem benutzten Algorithmus führt und der durch die Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem benutzte Algorithmus durch die Funknetzsteuerung gemäß der Sicherheitsfähigkeit ausgewählt wird.
Senden (205, 305) einer Weiterreichungsanfragenachricht zu der Mobilitätsverwaltungseinheit, wobei die Weiterreichungsanfragenachricht Anweisungsinformationen zum Anweisen der Mobilitätsverwaltungseinheit zum Senden der vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärtsstrecke führt; und
Empfangen (206) der vier niedrigstwertigen Bit der durch die Mobilitätsverwaltungseinheit gemäß den Anweisungsinformationen gesendeten Nichtzugangsschichtzählung auf der Abwärtsstrecke.
Überwachen und Sichern der Nichtzugangsschichtzählung auf der Abwärtsstrecke und Erzeugen einer neuen Nichtzugangsschichtzählung gemäß der gesicherten Nichtzugangsschichtzählung auf der Abwärtsstrecke, und
Erhalten der vier niedrigstwertigen Bit der neuen Nichtzugangsschichtzählung.
Senden der Weiterreichungsanfragenachricht zu der Mobilitätsverwaltungseinheit, wobei die Weiterreichungsanfragenachricht die neue Nichtzugangsschichtzählung führt, so dass die Mobilitätsverwaltungseinheit den Ziffernschlüssel und den Integritätsschlüssel gemäß der neuen Nichtzugangsschichtzählung berechnet.
Empfangen (401) durch die Benutzervorrichtung des durch die Basisstation gesendeten Weiterreichungsbefehls; und
Berechnen (402) durch die Benutzervorrichtung eines Ziffernschlüssels und eines Integritätsschlüssels gemäß den vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärtsstrecke.
Bestimmen durch die Benutzervorrichtung einer durch eine Mobilitätsverwaltungseinheit benutzten Nichtzugangsschichtzählung gemäß den vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärts strecke, die in dem Weiterreichungsbefehl geführt werden und einer durch die Benutzervorrichtung gesicherten Nichtzugangsschichtzählung auf der Abwärtsstrecke;
Berechnen durch die Benutzervorrichtung des Ziffernschlüssels und des Integritätsschlüssels gemäß der durch die Mobilitätsverwaltungseinheit benutzten Nichtzugangsschichtzählung und eines Wurzelschlüssels.
Senden durch die Mobilitätsverwaltungseinheit der S1-Anwendungsprotokollnachricht, wenn die Benutzervorrichtung auf das Netz zugreift.
Empfangen (501) durch die Mobilitätsverwaltungseinheit einer durch die Basisstation gesendeten Weiterreichungsanfragenachricht, wobei die Weiterreichungsanfragenachricht Anweisungsinformationen zum Anweisen der Mobilitätsverwaltungseinheit zum Senden der vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärtsstrecke führt; und
Senden (502) durch die Mobilitätsverwaltungseinheit der vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärtsstrecke zu der Basisstation gemäß den Anweisungsinformationen.
Berechnen (602) durch die Mobilitätsverwaltungseinheit des Ziffernschlüssels und des Integritätsschlüssels gemäß der neuen Nichtzugangsschichtzählung.
ein Erhaltungsmodul (71) eingerichtet zum Erhalten eines durch eine Benutzervorrichtung in einem universellen Mobilfunk-Telekommunikationssystem benutzten Algorithmus und vier niedrigstwertiger Bit einer Nichtzugangsschichtzählung auf der Abwärtsstrecke; und
ein Sendemodul (72) eingerichtet zum Senden eines Weiterreichungsbefehls zu der Benutzervorrichtung, die aus einem Langzeitentwicklungsnetz zu dem universellen Mobilfunk-Telekommunikationssystemnetz weitergereicht wird, wobei der Weiterreichungsbefehl den durch die Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem benutzten Algorithmus und die vier niedrigstwertigen Bit der Nichtzugangsschichtzählung auf der Abwärtsstrecke, die durch das Erhaltungsmodul (71) erhalten werden, führt,
gekennzeichnet durch weiterhin umfassend:
ein Empfangsmodul (73) eingerichtet zum Empfangen einer durch eine Mobilitätsverwaltungseinheit gesendeten S1-Anwendungsprotokollnachricht, wobei die S1-Anwendungsprotokollnachricht eine Sicherheitsfähigkeit der Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem führt;
wobei das Erhaltungsmodul (71) umfasst:
ein erstes Sende-Teilmodul (711) eingerichtet zum Senden einer Weiterreichungsanfragenachricht zu einer Funknetzsteuerung, wobei die Weiterreichungsanfragenachricht die Sicherheitsfähigkeit der Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem führt; und
ein erstes Empfangs-Teilmodul (712) eingerichtet zum Empfangen einer durch die Funknetzsteuerung gesendeten Weiterreichungsanfragebestätigungsnachricht, wobei die Weiterreichungsanfragebestätigungsnachricht den durch die Benutzervorrichtung im universellen Mobilfunk-Telekommunikationssystem benutzten Algorithmus führt und der durch die Benutzervorrichtung in dem universellen Mobilfunk-Telekommunikationssystem benutzte Algorithmus durch die Funknetzsteuerung gemäß der Sicherheitsfähigkeit ausgewählt wird.
ein Überwachungs-Teilmodul (713) eingerichtet zum Überwachen und Sichern der Nichtzugangsschichtzählung auf der Abwärtsstrecke;
ein Erzeugungs-Teilmodul (714) eingerichtet zum Erzeugen einer neuen Nichtzugangsschichtzählung gemäß der durch das Überwachungs-Teilmodul (713) gesicherten Nichtzugangsschichtzählung auf der Abwärtsstrecke; und
ein bedeutsames Bit erhaltendes Teilmodul (715) eingerichtet zum Erhalten von 4LSB der durch das Erzeugungs-Teilmodul (714) erzeugten neuen Nichtzugangsschichtzählung.
obtenir (101), par une station de base, un algorithme utilisé par un équipement utilisateur dans un système de télécommunication mobile universel et quatre bits les moins significatifs d'un compte de strate de non-accès de liaison descendante ; et
envoyer (102), par la station de base, une commande de transfert à l'équipement utilisateur, dans lequel la commande de transfert contient l'algorithme utilisé par l'équipement utilisateur dans le système de télécommunication mobile universel et les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante pour que l'équipement utilisateur calcule une clé de chiffrement et une clé d'intégrité selon les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante ;
caractérisé en ce que l'obtention (101), par la station de base, de l'algorithme utilisé par l'équipement utilisateur dans le système de télécommunication mobile universel comprend de :
envoyer (202, 302), par la station de base, un message de demande de transfert à un contrôleur de réseau radio, dans lequel le message de demande de transfert contient une capacité de sécurité de l'équipement utilisateur dans le système de télécommunication mobile universel, et la capacité de sécurité de l'équipement utilisateur dans le système de télécommunication mobile universel est obtenue à partir d'un message de protocole d'application S1 envoyé par une entité de gestion de la mobilité lorsque l'équipement utilisateur accède à un réseau, dans lequel le message de protocole d'application S1 contient la capacité de sécurité de l'équipement utilisateur dans le système de télécommunication mobile universel ; et
recevoir (203, 303), par la station de base, un message d'accusé de réception de demande de transfert envoyé par le contrôleur de réseau radio, dans lequel le message d'accusé de réception de demande de transfert contient l'algorithme utilisé par l'équipement utilisateur dans le système de télécommunication mobile universel, et l'algorithme utilisé par l'équipement utilisateur dans le système de télécommunication mobile universel est sélectionné par le contrôleur de réseau radio en fonction de la capacité de sécurité.
envoyer (205, 305) un message de demande de transfert à l'entité de gestion de la mobilité, dans lequel le message de demande de transfert contient des informations d'instruction pour donner l'ordre à l'entité de gestion de la mobilité d'envoyer les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante ; et
recevoir (206) les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante envoyés par l'entité de gestion de la mobilité en fonction des informations d'instruction.
surveiller et enregistrer le compte de strate de non-accès de liaison descendante et générer un nouveau compte de strate de non-accès en fonction du compte de strate de non-accès de liaison descendante enregistré ; et
obtenir quatre bits les moins significatifs du nouveau compte de strate de non-accès.
envoyer le message de demande de transfert à l'entité de gestion de la mobilité, dans lequel le message de demande de transfert contient le nouveau compte de strate de non-accès, de sorte que l'entité de gestion de la mobilité calcule la clé de chiffrement et la clé d'intégrité en fonction du nouveau compte de strate de non-accès.
recevoir (401), par l'équipement utilisateur, la commande de transfert envoyée par la station de base ; et
calculer (402), par l'équipement utilisateur, une clé de chiffrement et une clé d'intégrité selon les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante.
déterminer, par l'équipement utilisateur, un compte de strate de non-accès utilisé par une entité de gestion de la mobilité, en fonction des quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante qui sont contenus dans la commande de transfert et d'un compte de strate de non-accès de liaison descendante enregistrés par l'équipement utilisateur ; et
calculer, par l'équipement utilisateur, la clé de chiffrement et la clé d'intégrité, en fonction du compte de strate de non-accès utilisé par l'entité de gestion de la mobilité et d'une clé racine.
envoyer, par l'entité de gestion de la mobilité, le message de protocole d'application S1 lorsque l'équipement utilisateur accède au réseau.
recevoir (501), par l'entité de gestion de la mobilité, un message de demande de transfert envoyé par la station de base, dans lequel le message de demande de transfert contient des informations d'instruction pour donner l'ordre à l'entité de gestion de la mobilité d'envoyer les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante ; et
envoyer (502), par l'entité de gestion de la mobilité, les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante à la station de base en fonction des informations d'instruction.
calculer (602), par l'entité de gestion de la mobilité, la clé de chiffrement et la clé d'intégrité en fonction du nouveau compte de strate de non-accès.
un module d'obtention (71), configuré pour obtenir un algorithme utilisé par un équipement utilisateur dans un système de télécommunication mobile universel et quatre bits les moins significatifs d'un compte de strate de non-accès de liaison descendante ; et
un module d'envoi (72), configuré pour envoyer une commande de transfert à l'équipement utilisateur qui est transféré à partir d'un réseau d'évolution à long terme vers le réseau de système de télécommunication mobile universel, dans lequel la commande de transfert contient l'algorithme utilisé par l'équipement utilisateur dans le système de télécommunication mobile universel et les quatre bits les moins significatifs du compte de strate de non-accès de liaison descendante qui sont obtenus par le module d'obtention (71) ;
caractérisée par le fait qu'elle comprend en outre :
un module de réception (73), configuré pour recevoir un message de protocole d'application S1 envoyé par une entité de gestion de la mobilité, dans lequel le message de protocole d'application S1 contient une capacité de sécurité de l'équipement utilisateur dans le système de télécommunication mobile universel ;
dans lequel le module d'obtention (71) comprend :
un premier sous-module d'envoi (711), configuré pour envoyer un message de demande de transfert à un contrôleur de réseau radio, dans lequel le message de demande de transfert contient la capacité de sécurité de l'équipement utilisateur dans le système de télécommunication mobile universel ; et
un premier sous-module de réception (712), configuré pour recevoir un message d'accusé de réception de demande de transfert envoyé par le contrôleur de réseau radio, dans lequel le message d'accusé de réception de demande de transfert contient l'algorithme utilisé par l'équipement utilisateur dans le système de télécommunication mobile universel, et l'algorithme utilisé par l'équipement utilisateur dans le système de télécommunication mobile universel est sélectionné par le contrôleur de réseau radio en fonction de la capacité de sécurité.
un sous-module de surveillance (713), configuré pour surveiller et enregistrer le compte de strate de non-accès de liaison descendante ;
un sous-module de génération (714), configuré pour générer un nouveau compte de strate de non-accès en fonction du compte de strate de non-accès de liaison descendante enregistré par le sous-module de surveillance (713) ; et
un sous-module d'acquisition de bits significatif (715), configuré pour obtenir le 4LSB du nouveau compte de strate de non-accès généré par le sous-module de génération (714).
REFERENCES CITED IN THE DESCRIPTION
Patent documents cited in the description