WO2022094976A1 - 密钥生成方法及装置 - Google Patents
密钥生成方法及装置 Download PDFInfo
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- WO2022094976A1 WO2022094976A1 PCT/CN2020/127300 CN2020127300W WO2022094976A1 WO 2022094976 A1 WO2022094976 A1 WO 2022094976A1 CN 2020127300 W CN2020127300 W CN 2020127300W WO 2022094976 A1 WO2022094976 A1 WO 2022094976A1
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- access network
- network device
- base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
- H04W12/069—Authentication using certificates or pre-shared keys
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/80—Ingress point selection by the source endpoint, e.g. selection of ISP or POP
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/029—Firewall traversal, e.g. tunnelling or, creating pinholes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
- H04W12/041—Key generation or derivation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
Definitions
- the present application relates to the field of communication technologies, and in particular, to a method and device for generating a key.
- the 5th generation (5G) mobile communication system uses integrated access backhaul (IAB) technology.
- IAB integrated access backhaul
- base stations can be divided into IAB nodes (nodes) and IAB donor base stations (donors).
- the IAB donor is used to provide the user equipment interface to the core network and support the wireless backhaul function of the IAB node.
- the IAB node can support wireless access of terminal equipment and wireless backhaul of data. Since the data exchange between the IAB donor and the IAB node can be carried out through the wireless backhaul link, there is no need to lay cables between the IAB donor and the IAB node. This makes the deployment of IAB nodes more flexible.
- a secure tunnel for example, an internet protocol security (IPsec) secure tunnel
- IPsec internet protocol security
- the IAB node can be enabled to support dual connectivity (DC) to deal with possible abnormal situations in the wireless backhaul link, such as interruption or blocking of the wireless backhaul link, etc. .
- DC dual connectivity
- the present application provides a key generation method and device, which are used to ensure that the IAB donor and the IAB node generate the same K IAB in a dual connection scenario.
- a method for generating a key including: a first access network device determines that a first device registered to a 5G core network through the first access network device is an IAB node; and when a secondary base station needs to be selected for the first device If the first access network device does not have the IAB donor function, the first access network device selects the second access network device with the IAB donor function if the first access network device does not have the IAB donor function.
- the first access network device obtains the first key input parameter associated with the second access network device; the first access network device inputs the parameter according to the primary base station key and the first key, Generate the first IAB key K IAB1 , the master base station key is used to secure the communication between the master base station (the first access network device) and the first device, and K IAB1 is used to establish the connection between the second access network device and the first device.
- K IAB1 is used to establish the connection between the second access network device and the first device.
- the first access network device may select for the first device if it does not have the IAB donor function.
- the second access network device with the IAB donor function is used as a secondary base station to ensure that there is an access network device as an IAB donor to provide corresponding services for the first device in a dual-connection scenario.
- the first access network device in a dual-connection scenario such as NE-DC, NR-DC, or NGEN-DC, the first access network device generates a first IAB key K IAB1 according to the master base station key and the first key input parameter, and uses K IAB1 is sent to the first access network device.
- the IAB key generated by the master base station key is uniformly used between the IAB node and the IAB donor, thereby ensuring that the same IAB key can be used as the authentication credential to establish a secure tunnel between the IAB node and the IAB donor.
- the first access network device selects the second access network device with the IAB donor function as the secondary base station of the first device, including: the first access network device sends a first request message to the second device. , the first request message includes the identifier of the first device; the first access network device receives the first response message sent by the second device, and the first response message includes the identifier of the second access network device.
- the first key input parameter includes a first IP address and a second IP address
- the first IP address is the IP address used by the first device to communicate with the IAB donor
- the second IP address is the second IP address.
- acquiring the first key input parameter associated with the second access network device by the first access network device includes: the first access network device sends a secondary base station configuration message to the second access network device , the secondary base station configuration message is used to configure the second access network device as the secondary base station of the first device, the secondary base station configuration message includes first indication information and/or second indication information, and the first indication information is used to request the first IP address , the second indication information is used to request the second IP address; the first access network device receives the secondary base station configuration response message sent by the second access network device, and the secondary base station configuration response message includes the first IP address and/or the second IP address address.
- the first access network device obtains the first key input parameter by reusing the existing process, which is beneficial to saving signaling overhead , and simplify the operation process.
- the secondary base station configuration message includes the secondary base station key derived from the primary base station key, and the secondary base station key is used for security protection of the communication between the secondary base station and the first device.
- the above key generation method further includes: the first access network device sends the first IP address to the first device.
- obtaining the first key input parameter associated with the second access network device by the first access network device includes: the first access network device receives an IP address notification message sent by the first device, and the IP address
- the address notification message includes the first IP address; the first access network device sends a secondary base station configuration message to the second access network device, and the secondary base station configuration message is used to configure the second access network device as the secondary base station of the first device.
- the base station configuration message includes second indication information, and the second indication information is used to request a second IP address; the first access network device receives the secondary base station configuration response message sent by the second access network device, and the secondary base station configuration response message includes the second IP address.
- the first access network device can obtain the first IP address through the first device, and obtain the second IP address through the second access network device .
- the above key generation method further includes: if the first access network device has an IAB donor function, the first access network device selects a third access network device as the secondary base station of the first device; An access network device obtains a second key input parameter associated with the first access network device; the first access network device generates a second IAB key K IAB2 according to the master base station key and the second key input parameter, K IAB2 is used to establish a secure tunnel between the first access network device and the first device.
- the second key input parameter includes: the first IP address and the third IP address, the first IP address is the IP address that the first device is used to communicate with the IAB donor, and the third IP address is the first IP address.
- obtaining the second key input parameter associated with the first access network device by the first access network device includes: the first access network device assigns the first IP address to the first device; the first The access network device obtains the third IP address from the database.
- acquiring the second key input parameter associated with the first access network device by the first access network device includes: the first access network device receives an IP address notification message sent by the first device, the IP address The address notification message includes the first IP address; the first access network device obtains the third IP address from the database.
- a second aspect provides a key generation method, including: a second access network device receiving a secondary base station configuration message sent by a first access network device, where the secondary base station configuration message is used to configure the second access network device as the first access network device The secondary base station of the device; when the secondary base station configuration message includes the third indication information, the second access network device determines whether it has the IAB donor function, and the third indication information is used to indicate that the first device is an IAB node; When the network device has the IAB hosting function, the second access network device obtains the first IAB key K IAB1 from the first access network device, and the K IAB1 is used to establish the relationship between the second access network device and the first access network device. A secure tunnel between devices, the K IAB1 is generated according to the master base station key, and the master base station key is used to secure the communication between the first access network device and the first device .
- the second access network device with the IAB donor function as the secondary base station of the first device it is ensured that the access network device as the IAB donor is the IAB node (that is, the first device in the dual-connection scenario). ) to provide corresponding services.
- the second access network device enables the IAB node and the IAB donor to uniformly use the IAB key generated with the master base station key, thereby ensuring the connection between the IAB node and the IAB donor.
- a secure tunnel can be established with the same IAB key as the authentication credential.
- K IAB1 is generated according to the master base station key, including: K IAB1 is generated according to the master base station key and the first key input parameter.
- the first key input parameter includes a first IP address and a second IP address, the first IP address is the IP address used by the first device to communicate with the IAB donor, and the second IP address is the second access network device used to communicate with the IAB The IP address of node communication.
- the secondary base station configuration message further includes first indication information and/or second indication information, where the first indication information is used to request the first IP address, and the second indication information is used to request the second IP address.
- the above key generation method further includes: the second access network device sends a secondary base station configuration response message to the first access network device, where the secondary base station configuration response message includes the first IP address and/or the second IP address.
- the second access network device acquiring KIAB1 from the first access network device includes: the second access network device receiving the auxiliary information sent by the first access network device.
- the base station reconfiguration complete message, the secondary base station reconfiguration complete message includes the K IAB1 .
- the second access network device acquiring KIAB1 from the first access network device includes: the second access network device sending a key to the first access network device request message, the key request message is used to request the K IAB1 ; the second access network device receives a key response message sent by the first access network device, and the key response message includes the K IAB1 .
- the key request message further includes the first IP address and/or the second IP address.
- a method for generating a key is provided, which is applied to a scenario where a first device is connected to a primary base station and a secondary base station, and the first device has an IAB node function.
- the key generation method includes: the first device determines the type of dual connection according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station and the communication standard supported by the core network; when the type of dual connection is NE-DC, NR-DC In the case of DC or NGEN-DC, the first device generates an IAB key K IAB according to the master base station key, and the master base station key is used for security protection of the communication security between the first device and the master base station.
- the IAB node determines the type of dual connection, so in the NE-DC, NR-DC or NGEN-DC scenario, the IAB node uses the master base station key to generate the IAB key K IAB , so that the IAB node and the The IAB key generated by the master base station key is uniformly used among the IAB donors, thereby ensuring that the same IAB key can be used as the authentication credential to establish a secure tunnel between the IAB node and the IAB donor.
- the above-mentioned key generation method further includes: the first device receives a broadcast message of the main base station; the first device determines a communication standard supported by the main base station according to a configuration parameter in the broadcast message, and the configuration parameter includes one of the following or multiple items: base station identifier, logical cell identifier, physical cell identifier, uplink frequency point or downlink frequency point.
- the first device determines the communication standard supported by the main base station according to the configuration parameters in the broadcast message, including: when the configuration parameters in the broadcast message belong to the 5G communication system, the first device determines that the main base station supports 5G communication. standard; or, when the configuration parameter in the broadcast message belongs to the 4G communication system, the first device determines that the primary base station supports the 4G communication standard.
- the above key generation method further includes: the first device receives an RRC reconfiguration message sent by the primary base station, where the RRC reconfiguration message includes configuration information of the secondary cell group; and the first device determines the configuration information of the secondary cell group according to the configuration information of the secondary cell group.
- the communication standard supported by the secondary base station is not limited to: the first device receives an RRC reconfiguration message sent by the primary base station, where the RRC reconfiguration message includes configuration information of the secondary cell group; and the first device determines the configuration information of the secondary cell group according to the configuration information of the secondary cell group.
- the first device determines the communication standard supported by the secondary base station according to the RRC reconfiguration message, including: when the configuration information of the secondary cell group belongs to the 5G communication standard, the first device determines that the secondary base station supports the 5G communication standard; or , when the configuration information of the secondary cell group belongs to the 4G communication standard, the first device determines that the secondary base station supports the 4G communication standard.
- the above key generation method further includes: the first device receives a broadcast message sent by the primary base station; and the first device determines a communication standard supported by the core network according to the cell configuration information in the broadcast message.
- the first device determines the communication standard supported by the core network according to the cell configuration information in the broadcast message, including: when the cell configuration information belongs to the 5G communication standard, the first device determines that the core network supports the 5G communication standard; Or, when the cell configuration information belongs to the 4G communication standard, the first device determines that the core network supports the 4G communication standard.
- the first device determines the type of dual connection according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station, and the communication standard supported by the core network, including: when the primary base station supports the 5G network standard, the secondary base station supports 4G network standard, when the core network supports the 5G network standard, the first device determines that the dual connection type is NE-DC; or, when the primary base station supports the 5G network standard, the secondary base station supports the 5G network standard, and the core network supports the 5G network standard, the first device supports the 5G network standard.
- the device determines that the dual connection type is NR-DC; or, when the primary base station supports the 4G network standard, the secondary base station supports the 5G network standard, and the core network supports the 5G network standard, the first device determines that the dual connection type is NGEN-DC; or, when the primary base station supports the 5G network standard When the 4G network standard is supported, the secondary base station supports the 5G network standard, and the core network supports the 4G network standard, the first device determines that the dual connection type is EN-DC.
- a method for generating a key comprising: determining, by a first access network device, that a first device registered to a network through the first access network device is an IAB node; if the first access network device has an IAB donor function, the first access network device selects the third access network device as the secondary base station of the first device; the first access network device generates a second IAB key KIAB2 according to the secondary base station key, and KIAB2 is used to establish A secure tunnel between the first access network device and the first device, and the secondary base station key is used to secure the communication between the secondary base station and the first device.
- the first access network device since the first access network device determines that the first device is an IAB node, and the first access network device has the IAB donor function, the first access network device can serve as the IAB donor of the first device. Furthermore, in the dual-connection scenario, the first access network device generates K IAB2 according to the secondary base station key, thereby ensuring that the IAB node and the IAB donor use the IAB key generated with the secondary base station key uniformly, thereby ensuring that the IAB node A secure tunnel can be established with the IAB donor using the same IAB key as the authentication credential.
- the secondary base station key is derived from the primary base station key, and the primary base station key is used for security protection of the communication between the first access network device and the first device.
- the method further includes: the first access network device sends a secondary base station configuration message to the second access network device, and the secondary base station The configuration message includes the secondary base station key; the first access network device receives the secondary base station configuration response message sent by the second access network device.
- the first access network device generates KIAB2 according to the secondary base station key, including: after the first access network device sends the secondary base station configuration message, generating KIAB2 according to the secondary base station key.
- the first access network device generates KIAB2 according to the secondary base station key, including: after the first access network device receives the secondary base station configuration response message, generating KIAB2 according to the secondary base station key. .
- the above-mentioned key generation method also includes: if the first access network device does not have the IAB donor function, then the first access network device selects the second access network device with the IAB donor function as the first access network device.
- a method for generating a key is provided, which is applied to a scenario where a first device is connected to a primary base station and a secondary base station, and the first device has an IAB node function.
- the key generation method includes: the first device determines the type of dual connection according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station and the communication standard supported by the core network; when the type of dual connection is NE-DC, NR-DC In the case of DC or NGEN-DC, the first device generates an IAB key K IAB according to the secondary base station key, and the secondary base station key is used for security protection of communication security between the first device and the secondary base station.
- the IAB node determines the type of dual connectivity, so that in the NE-DC, NR-DC or NGEN-DC scenario, the IAB node uses the secondary base station key to generate the IAB key K IAB , so that the IAB node and the The IAB key generated by the secondary base station key is uniformly used among the IAB donors, thereby ensuring that the same IAB key can be used as the authentication credential to establish a secure tunnel between the IAB node and the IAB donor.
- the above-mentioned key generation method further includes: the first device receives a broadcast message of the main base station; the first device determines a communication standard supported by the main base station according to a configuration parameter in the broadcast message, and the configuration parameter includes one of the following or multiple items: base station identifier, logical cell identifier, physical cell identifier, uplink frequency point or downlink frequency point.
- the first device determines the communication standard supported by the main base station according to the configuration parameters in the broadcast message, including: when the configuration parameters in the broadcast message belong to the 5G communication system, the first device determines that the main base station supports 5G communication. standard; or, when the configuration parameter in the broadcast message belongs to the 4G communication system, the first device determines that the primary base station supports the 4G communication standard.
- the above key generation method further includes: the first device receives an RRC reconfiguration message sent by the primary base station, where the RRC reconfiguration message includes configuration information of the secondary cell group; and the first device determines the configuration information of the secondary cell group according to the configuration information of the secondary cell group.
- the communication standard supported by the secondary base station is not limited to: the first device receives an RRC reconfiguration message sent by the primary base station, where the RRC reconfiguration message includes configuration information of the secondary cell group; and the first device determines the configuration information of the secondary cell group according to the configuration information of the secondary cell group.
- the first device determines the communication standard supported by the secondary base station according to the RRC reconfiguration message, including: when the configuration information of the secondary cell group belongs to the 5G communication standard, the first device determines that the secondary base station supports the 5G communication standard; or , when the configuration information of the secondary cell group belongs to the 4G communication standard, the first device determines that the secondary base station supports the 4G communication standard.
- the above key generation method further includes: the first device receives a broadcast message sent by the primary base station; and the first device determines a communication standard supported by the core network according to the cell configuration information in the broadcast message.
- the first device determines the communication standard supported by the core network according to the cell configuration information in the broadcast message, including: when the cell configuration information belongs to the 5G communication standard, the first device determines that the core network supports the 5G communication standard; Or, when the cell configuration information belongs to the 4G communication standard, the first device determines that the core network supports the 4G communication standard.
- the first device determines the type of dual connection according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station, and the communication standard supported by the core network, including: when the primary base station supports the 5G network standard, the secondary base station supports 4G network standard, when the core network supports the 5G network standard, the first device determines that the dual connection type is NE-DC; or, when the primary base station supports the 5G network standard, the secondary base station supports the 5G network standard, and the core network supports the 5G network standard, the first device supports the 5G network standard.
- the device determines that the dual connection type is NR-DC; or, when the primary base station supports the 4G network standard, the secondary base station supports the 5G network standard, and the core network supports the 5G network standard, the first device determines that the dual connection type is NGEN-DC; or, when the primary base station supports the 5G network standard When the 4G network standard is supported, the secondary base station supports the 5G network standard, and the core network supports the 4G network standard, the first device determines that the dual connection type is EN-DC.
- a method for generating a key is provided, which is applied to a scenario where a first device is connected to a primary base station and a secondary base station, and the first device has an IAB node function.
- the key generation method includes: the first device knows the primary base station or the secondary base station as the IAB donor; when the primary base station is the IAB donor, the first device generates the IAB key according to the primary base station key and the key input parameters, and the IAB key uses For establishing a secure tunnel between the IAB node and the IAB donor, the primary base station key is used to secure the communication between the first device and the primary base station; or, when the secondary base station is an IAB donor, the primary base station The key and key input parameters are used to generate an IAB key, and the secondary base station key is used to secure the communication between the first device and the secondary base station.
- the main base station is used as the IAB donor, it is ensured that both the IAB node and the IAB donor use the main base station key to generate the IAB key.
- the secondary base station is used as the IAB donor, ensure that both the IAB node and the IAB donor use the secondary base station key to generate the IAB key. In this way, it is guaranteed that in the dual connection scenario, the same IAB key can be used as the authentication credential to establish a secure tunnel between the IAB donor and the IAB node.
- the first device learns that the primary base station or the secondary base station is used as the IAB donor, including: when the first device receives the fourth indication information, the first device learns that the primary base station is the IAB donor, and the fourth indication information is used for Indicate that the primary base station is an IAB donor; or, when the first device receives the fifth indication information, the first device learns that the secondary base station is an IAB donor, and the fifth indication information is used to indicate that the secondary base station is an IAB donor.
- the first device learns that the primary base station or the secondary base station is the IAB donor, including: when a wireless backhaul link is established between the first device and the primary base station, the first device learns that the primary base station is the IAB donor; Or, When a wireless backhaul link is established between the first device and the secondary base station, the first device learns that the secondary base station is an IAB donor.
- the first device obtains the primary base station or the secondary base station as the IAB donor, including: the first device obtains the frequency band supported by the primary base station and the frequency band supported by the secondary base station; when the frequency band supported by the primary base station is higher than the frequency band supported by the secondary base station.
- the first device learns that the primary base station is an IAB donor; or, when the frequency band supported by the primary base station is lower than the frequency band supported by the secondary base station, the first device learns that the secondary base station is an IAB donor.
- the first device learns that the primary base station or the secondary base station is used as the IAB donor, including: when the first device receives the sixth indication information broadcast by the primary base station, the first device learns that the primary base station is the IAB donor; or, when When the first device receives the sixth indication information broadcast by the secondary base station, the first device learns that the secondary base station is an IAB donor; wherein, the sixth indication information is used to indicate that the base station has an IAB donor function.
- a communication apparatus which is applied to a first access network device.
- the communication device includes: a processing module and a communication module.
- the processing module is used to determine that the first device registered to the 5G core network is an IAB node; when it is necessary to select a secondary base station for the first device, determine whether it has the IAB donor function; if it does not have the IAB donor function, choose to have the IAB donor function.
- the second access network device of the IAB donor function acts as the secondary base station of the first device; obtains the first key input parameter associated with the second access network device; generates the first key input parameter according to the primary base station key and the first key input parameter
- An IAB key K IAB1 the master base station key is used to secure the communication between the master base station (the first access network device) and the first device, and K IAB1 is used to establish the connection between the second access network device and the first device. Secure tunnel between devices.
- a communication module configured to send K IAB1 to the second access network device.
- the communication module is further configured to send a first request message to the second device, where the first request message includes the identifier of the first device; and receive a first response message sent by the second device, where the first response message includes The identifier of the second access network device.
- the first key input parameter includes a first IP address and a second IP address
- the first IP address is the IP address used by the first device to communicate with the IAB donor
- the second IP address is the second IP address.
- the communication module is configured to send a secondary base station configuration message to the second access network device, the secondary base station configuration message is used to configure the second access network device as a secondary base station of the first device, and the secondary base station configuration message Including first indication information and/or second indication information, the first indication information is used to request the first IP address, and the second indication information is used to request the second IP address; receive the secondary base station configuration response sent by the second access network device message, the secondary base station configuration response message includes the first IP address and/or the second IP address.
- the secondary base station configuration message includes the secondary base station key derived from the primary base station key, and the secondary base station key is used for security protection of the communication between the secondary base station and the first device.
- the communication module is further configured to send the first IP address to the first device.
- the communication module is further configured to receive an IP address notification message sent by the first device, where the IP address notification message includes the first IP address; send a secondary base station configuration message to the second access network device, and the secondary base station configures The message is used to configure the second access network device as the secondary base station of the first device, the secondary base station configuration message includes second indication information, and the second indication information is used to request the second IP address; receive the secondary base station sent by the second access network device.
- the base station configuration response message, and the secondary base station configuration response message includes the second IP address.
- the processing module is further configured to select the third access network device as the secondary base station of the first device if it has the IAB donor function; obtain the second key associated with the first access network device Input parameters; generate a second IAB key K IAB2 according to the master base station key and the second key input parameter, and K IAB2 is used to establish a secure tunnel between itself and the first device.
- the second key input parameter includes: the first IP address and the third IP address, the first IP address is the IP address that the first device is used to communicate with the IAB donor, and the third IP address is the first IP address.
- the processing module is further configured to assign the first IP address to the first device; and obtain the third IP address from the database.
- the communication module is further configured to receive an IP address notification message sent by the first device, where the IP address notification message includes the first IP address.
- the processing module is also used to obtain the third IP address from the database.
- a communication apparatus which is applied to a second access network device.
- the communication device includes: a communication module and a processing module.
- the communication module is configured to receive a secondary base station configuration message sent by the first access network device, where the secondary base station configuration message is used to configure the second access network device as a secondary base station of the first device.
- the processing module is configured to determine whether the secondary base station has an IAB donor function when the configuration message of the secondary base station includes third indication information, and the third indication information is used to indicate that the first device is an IAB node.
- the communication module is further configured to obtain the first IAB key K IAB1 from the first access network device when it has the IAB host function, and the K IAB1 is used to establish the connection between the second access network device and the first access network device.
- a secure tunnel between devices, the K IAB1 is generated according to the master base station key, and the master base station key is used to secure the communication between the first access network device and the first device .
- K IAB1 is generated according to the master base station key, including: K IAB1 is generated according to the master base station key and the first key input parameter.
- the first key input parameter includes a first IP address and a second IP address, the first IP address is the IP address used by the first device to communicate with the IAB donor, and the second IP address is the second access network device used to communicate with the IAB The IP address of node communication.
- the secondary base station configuration message further includes first indication information and/or second indication information, where the first indication information is used to request the first IP address, and the second indication information is used to request the second IP address.
- the communication module is further configured to send a secondary base station configuration response message to the first access network device, where the secondary base station configuration response message includes the first IP address and/or the second IP address.
- the communication module is specifically configured to receive a secondary base station reconfiguration complete message sent by the first access network device, where the secondary base station reconfiguration complete message includes the K IAB1 .
- the communication module is specifically configured to send a key request message to the first access network device, where the key request message is used to request the K IAB1 ; receive the first access network device The key response message sent by the device, the key response message includes the K IAB1 .
- the key request message further includes the first IP address and/or the second IP address.
- a communication apparatus which is applied to the first device.
- the communication device includes: a processing module.
- the processing module is used to determine the type of dual connection according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station, and the communication standard supported by the core network; when the type of dual connection is NE-DC, NR-DC or NGEN-DC
- K IAB is generated according to the key of the master base station and the key input parameter, and the key of the master base station is used for security protection of the communication security between the first device and the master base station.
- the communication device further includes a communication module.
- the communication module is used for receiving the broadcast message of the main base station.
- the processing module is further configured to determine the communication standard supported by the main base station according to the configuration parameters in the broadcast message, and the configuration parameters include one or more of the following: base station identification, logical cell identification, physical cell identification, uplink frequency point or downlink frequency point .
- the processing module is specifically used to determine that the main base station supports the 5G communication system when the configuration parameters in the broadcast message belong to the 5G communication system; or, when the configuration parameters in the broadcast message belong to the 4G communication system, determine The main base station supports 4G communication standard.
- the communication device further includes a communication module.
- the communication module is configured to receive an RRC reconfiguration message sent by the primary base station, where the RRC reconfiguration message includes configuration information of the secondary cell group.
- the processing module is configured to determine the communication standard supported by the secondary base station according to the configuration information of the secondary cell group.
- the processing module is specifically configured to determine that the secondary base station supports the 5G communication mode when the configuration information of the secondary cell group belongs to the 5G communication mode; or, when the configuration information of the secondary cell group belongs to the 4G communication mode, to determine the secondary base station.
- Support 4G communication standard is specifically configured to determine that the secondary base station supports the 5G communication mode when the configuration information of the secondary cell group belongs to the 5G communication mode; or, when the configuration information of the secondary cell group belongs to the 4G communication mode, to determine the secondary base station. Support 4G communication standard.
- the communication device further includes a communication module.
- the communication module is used for receiving broadcast messages sent by the main base station.
- the processing module is configured to determine the communication standard supported by the core network according to the cell configuration information in the broadcast message.
- the processing module is specifically used to determine that the core network supports the 5G communication mode when the cell configuration information belongs to the 5G communication mode; or, when the cell configuration information belongs to the 4G communication mode, determine that the core network supports the 4G communication mode.
- the processing module is specifically used to determine the dual connection type as NE-DC when the primary base station supports the 5G network standard, the secondary base station supports the 4G network standard, and the core network supports the 5G network standard; or, when the primary base station supports 5G Network standard, when the secondary base station supports the 5G network standard and the core network supports the 5G network standard, determine the dual connection type as NR-DC; or, when the primary base station supports the 4G network standard, the secondary base station supports the 5G network standard, and the core network supports the 5G network standard , determine that the dual connection type is NGEN-DC; or, when the primary base station supports the 4G network standard, the secondary base station supports the 5G network standard, and the core network supports the 4G network standard, the dual connection type is determined to be EN-DC.
- a tenth aspect provides a communication apparatus, which is applied to a first access network device.
- the communication device includes: a processing module.
- the processing module is used to determine that the first device registered to the network is an IAB node; when it is necessary to select a secondary base station for the first device, determine whether it has the IAB donor function; if it has the IAB donor function, select the third connection.
- the network access device acts as the secondary base station of the first device; according to the secondary base station key, an IAB key KIAB is generated, and KIAB is used to establish a secure tunnel between itself and the first device, and the secondary base station key is used to The communication between the secondary base station and the first device is securely protected.
- the secondary base station key is derived from the primary base station key, and the primary base station key is used for security protection of the communication between the first access network device and the first device.
- the communication device further includes a communication module.
- a communication module configured to send a secondary base station configuration message to the second access network device after the processing module generates the K IAB , where the secondary base station configuration message includes the secondary base station key; and receives a secondary base station configuration response sent by the second access network device information.
- the processing module is specifically configured to generate KIAB according to the secondary base station key after the communication module sends the secondary base station configuration message.
- the processing module is specifically configured to generate KIAB according to the secondary base station key after receiving the secondary base station configuration response message.
- the processing module is also used to select the second access network device with the IAB donor function as the secondary base station of the first device if it does not have the IAB donor function;
- the secondary base station configuration message, the secondary base station configuration message includes the secondary base station key.
- a communication apparatus which is applied to a first device.
- the communication device includes: a processing module.
- the processing module is used to determine the type of dual connection according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station, and the communication standard supported by the core network; when the type of dual connection is NE-DC, NR-DC or NGEN-DC
- K IAB is generated according to the secondary base station key, and the secondary base station key is used for security protection of the communication security between the first device and the secondary base station.
- the communication device further includes a communication module.
- the communication module is used for receiving the broadcast message of the main base station.
- the processing module is further configured to determine the communication standard supported by the main base station according to the configuration parameters in the broadcast message, and the configuration parameters include one or more of the following: base station identification, logical cell identification, physical cell identification, uplink frequency point or downlink frequency point .
- the processing module is specifically used to determine that the main base station supports the 5G communication system when the configuration parameters in the broadcast message belong to the 5G communication system; or, when the configuration parameters in the broadcast message belong to the 4G communication system, determine The main base station supports 4G communication standard.
- the communication device further includes a communication module.
- the communication module is configured to receive an RRC reconfiguration message sent by the primary base station, where the RRC reconfiguration message includes configuration information of the secondary cell group.
- the processing module is configured to determine the communication standard supported by the secondary base station according to the configuration information of the secondary cell group.
- the processing module is specifically configured to determine that the secondary base station supports the 5G communication mode when the configuration information of the secondary cell group belongs to the 5G communication mode; or, when the configuration information of the secondary cell group belongs to the 4G communication mode, to determine the secondary base station.
- Support 4G communication standard is specifically configured to determine that the secondary base station supports the 5G communication mode when the configuration information of the secondary cell group belongs to the 5G communication mode; or, when the configuration information of the secondary cell group belongs to the 4G communication mode, to determine the secondary base station. Support 4G communication standard.
- the communication device further includes a communication module.
- the communication module is used for receiving broadcast messages sent by the main base station.
- the processing module is configured to determine the communication standard supported by the core network according to the cell configuration information in the broadcast message.
- the processing module is specifically used to determine that the core network supports the 5G communication mode when the cell configuration information belongs to the 5G communication mode; or, when the cell configuration information belongs to the 4G communication mode, determine that the core network supports the 4G communication mode.
- the processing module is specifically used to determine the dual connection type as NE-DC when the primary base station supports the 5G network standard, the secondary base station supports the 4G network standard, and the core network supports the 5G network standard; or, when the primary base station supports 5G Network standard, when the secondary base station supports the 5G network standard and the core network supports the 5G network standard, determine the dual connection type as NR-DC; or, when the primary base station supports the 4G network standard, the secondary base station supports the 5G network standard, and the core network supports the 5G network standard , determine that the dual connection type is NGEN-DC; or, when the primary base station supports the 4G network standard, the secondary base station supports the 5G network standard, and the core network supports the 4G network standard, the dual connection type is determined to be EN-DC.
- a twelfth aspect provides a communication apparatus, which is applied to a first device, where the first device has an IAB node function.
- the communication device includes: a processing module.
- the processing module is used to know the primary base station or the secondary base station as the IAB donor; when the primary base station is the IAB donor, the IAB key is generated according to the primary base station key and key input parameters, and the IAB key is used to establish the relationship between the IAB node and the IAB donor. or, when the secondary base station is an IAB donor, generate an IAB key according to the secondary base station key and key input parameters.
- the processing module is specifically used to know that the primary base station is an IAB donor when receiving the fourth indication information, and the fourth indication information is used to indicate that the primary base station is an IAB donor; or, when receiving the fifth indication information, it is learned that the secondary base station is an IAB donor, and the fifth indication information is used to indicate that the secondary base station is an IAB donor.
- the processing module is specifically used to know that the primary base station is an IAB donor when a wireless backhaul link is established between the communication device and the primary base station; or, when a wireless backhaul link is established between the communication device and the secondary base station When , it is learned that the secondary base station is an IAB donor.
- the processing module is specifically used to obtain the frequency band supported by the primary base station and the frequency band supported by the secondary base station; when the frequency band supported by the primary base station is higher than the frequency band supported by the secondary base station, it is known that the primary base station is an IAB donor; When the frequency band supported by the base station is lower than the frequency band supported by the secondary base station, it is learned that the secondary base station is an IAB donor.
- the processing module is specifically configured to learn that the primary base station is an IAB donor when receiving the sixth indication information broadcast by the primary base station; or, when receiving the sixth indication information broadcasted by the secondary base station, learn that the secondary base station is an IAB donor. IAB donor; wherein, the sixth indication information is used to indicate that the base station has the IAB donor function.
- a thirteenth aspect provides a communication device, including a processor and a communication port, the processor is configured to execute computer program instructions, so that the communication device implements any one of the designs provided in any one of the first to sixth aspects.
- a computer-readable storage medium stores instructions, when the instructions are executed on a computer, the computer is made to implement any one of the first to sixth aspects.
- a fifteenth aspect provides a computer program product, the computer program product comprising instructions, when the computer program product runs on a computer, causing the computer to implement any one of the designs provided in any one of the first to sixth aspects the methods involved.
- a sixteenth aspect provides a chip, the chip includes a processor, and when the processor executes computer program instructions, the computer enables the computer to implement the method involved in any one of the designs provided in any one of the first to sixth aspects .
- the technical effect brought by any one of the design methods in the above seventh aspect to the sixteenth aspect can refer to the beneficial effects in the corresponding method provided above and the technical effect brought by the design method, and no Repeat.
- FIG. 2 is a schematic diagram of an IAB networking scenario provided by an embodiment of the present application.
- FIG. 3 is a schematic diagram of a user plane protocol stack in an IAB network according to an embodiment of the present application.
- FIG. 4 is a schematic diagram of a control plane protocol stack in an IAB network according to an embodiment of the present application.
- FIG. 5 is a schematic diagram of an IAB node adopting an EN-DC mode provided by an embodiment of the present application
- FIG. 6 is a flowchart of generating an IAB key in an EN-DC scenario provided by an embodiment of the present application
- FIG. 7 is a schematic diagram of an IAB node adopting an NE-DC mode provided by an embodiment of the present application.
- FIG. 8 is a schematic diagram of an IAB node adopting an NR-DC mode according to an embodiment of the present application.
- FIG. 9 is a schematic diagram of an IAB node adopting NGEN-DC mode provided by an embodiment of the present application.
- FIG. 10 is a flowchart of a method for generating a key provided by an embodiment of the present application.
- FIG. 11 is a flowchart of another key generation method provided by an embodiment of the present application.
- FIG. 13 is a flowchart of another key generation method provided by an embodiment of the present application.
- 16 is a flowchart of another key generation method provided by an embodiment of the present application.
- 17 is a flowchart of another key generation method provided by an embodiment of the present application.
- 21 is a flowchart of another key generation method provided by an embodiment of the present application.
- 25 is a flowchart of another key generation method provided by an embodiment of the present application.
- 26 is a flowchart of another key generation method provided by an embodiment of the present application.
- FIG. 28 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- FIG. 29 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the present application.
- DC can support two or more base stations to provide data transmission service for one terminal device at the same time.
- These base stations include a primary base station and one or more secondary base stations.
- the above-mentioned primary base station may also be referred to as a master node (master node, MN) or a main access network device, and the above-mentioned secondary base station may also be referred to as a secondary node (secondary node, SN) or an auxiliary access network device.
- master node master node
- secondary node secondary node
- SN secondary node
- the main base station and the core network are connected through the S1/NG interface.
- the main base station and the core network at least include a control plane connection, and may also have a user plane connection.
- the S1 interface includes S1-U and S1-C.
- the NG interface includes NG-U and NG-C. Among them, S1-U/NG-U represents the user plane connection, and S1-C/NG-C represents the control plane connection.
- the secondary base station There may or may not be a user plane connection between the secondary base station and the core network.
- the data of the terminal equipment can be offloaded by the primary base station to the secondary base station at the packet data convergence protocol (PDCP) layer.
- PDCP packet data convergence protocol
- the primary base station According to the communication standards supported by the primary base station, the secondary base station, and the core network to which the primary base station is connected, there can be multiple types of dual connectivity.
- the following table 1 is used as an example to describe the type of dual connection.
- the primary base station manages a primary cell (PCell).
- the primary cell refers to a cell deployed at the primary frequency point and accessed when the terminal initiates the initial connection establishment process or the RRC connection re-establishment process, or is indicated as the primary cell during the handover process.
- the primary base station may also manage one or more secondary cells (secondary cells, SCells).
- secondary cells secondary cells, SCells.
- the cells under the main base station that provide services for the terminal, such as the main cell and the secondary cells under the main base station, can be formed (master cell group, MCG).
- the secondary base station manages a primary secondary cell (primary secondary cell, PSCell).
- the primary and secondary cell may be a cell accessed by the terminal during the random access process initiated by the terminal to the secondary base station, or a cell on another secondary base station where the terminal skips the random access process to initiate data transmission during the secondary base station change process, or executes When synchronizing the reconfiguration process, initiate the cell on the secondary base station accessed in the random access process.
- the secondary base station may also manage one or more secondary cells.
- the cells on the secondary base station that provide services for the terminal, such as primary and secondary cells and secondary cells on the secondary base station may form a secondary cell group (SCG).
- SCG secondary cell group
- the terminal device is a device with a wireless transceiver function.
- Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
- the terminal equipment may be user equipment (user equipment, UE).
- the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function.
- the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
- the terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned driving, and a wireless terminal device in telemedicine.
- VR virtual reality
- AR augmented reality
- Terminal equipment wireless terminal equipment in smart grid, wireless terminal equipment in smart city, wireless terminal equipment in smart home, etc.
- the above-mentioned primary base station and secondary base station may be collectively referred to as network equipment.
- the network equipment includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC) ), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved Node B, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless relay node, wireless backhaul node,
- the transmission point (transmission and reception point, TRP or transmission point, TP), etc. can also be 5G, such as the gNB in the new radio (new radio, NR) system, or the transmission point (TRP or TP), in the 5G system
- One or a group (including multiple antenna panels) antenna panels of the base station or, it can also be a network node that constitutes a gNB
- the network device may adopt a centralized unit (centralized unit, CU)-DU architecture. That is, the network device may be composed of a CU and at least one DU. In this case, some functions of the network device are deployed on the CU, and another part of the functions of the network device are deployed on the DU.
- CU and DU are functionally divided according to the protocol stack.
- the CU deploys the RRC layer in the protocol stack, the packet data convergence protocol (PDCP) layer, and the service data adaptation protocol (SDAP) layer;
- the DU deploys the protocol The radio link control (RLC) layer, the media access control (MAC) layer, and the physical layer (PHY) in the stack.
- RLC radio link control
- MAC media access control
- PHY physical layer
- the CU has the processing capabilities of RRC, PDCP and SDAP.
- DU has the processing capability of RLC, MAC and PHY. It can be understood that the division of the above functions is only an example, and does not constitute a limitation on the CU and the DU. That is to say, there may also be other functional division manners between the CU and the DU, which are not described in detail in this embodiment of the present application.
- a dual-connection configuration process includes the following steps:
- the terminal device registers with the network through the main base station.
- the master base station may deliver a measurement event to the terminal device, so that the terminal device reports a measurement report to the master base station.
- the primary base station can determine whether to add a secondary base station for the terminal device according to the measurement report. If it is determined to add a secondary base station for the terminal device, the primary base station may perform the following step S11.
- the primary base station determines to add a secondary base station for the terminal device.
- the primary base station sends a secondary node addition/modification request (SN addition/modification request) message to the secondary base station.
- the SN addition/modification request message includes the relevant configuration information of the secondary base station.
- the primary base station may generate the secondary base station key. After that, the SN addition/modification request message sent by the primary base station may carry the secondary base station key. Since the primary base station does not use the secondary base station key, the primary base station can delete the secondary base station key after sending the SN addition/modification request message.
- the secondary base station sends a secondary node addition/modification request acknowledgment (SN addition/modification request ack) message to the primary base station.
- SN addition/modification request ack secondary node addition/modification request acknowledgment
- the SN addition/modification request ack message is used to express agreement to use the configuration information carried in the SN addition/modification request message.
- the primary base station sends an RRC reconfiguration message to the terminal device.
- the RRC reconfiguration message is used to configure the radio bearer between the terminal device and the secondary base station.
- the terminal device sends an RRC reconfiguration complete message to the master base station.
- the primary base station sends a secondary node reconfiguration complete (SN reconfiguration complete) message to the secondary base station.
- SN reconfiguration complete secondary node reconfiguration complete
- the terminal device and the secondary base station can perform a random access procedure (random access procedure). After the random access procedure, an RRC connection is established between the terminal device and the secondary base station.
- the K gNB is derived from the terminal equipment and the access and mobility management function (AMF) respectively according to the K AMF .
- AMF access and mobility management function
- the AMF After the AMF derives the K gNB , it will send the K gNB to the access network device connected to the terminal device. In this way, the terminal device and the access network device maintain the same K gNB , so that the terminal device and the access network device can use the K gNB and its derived key for secure communication.
- K eNB is obtained by terminal equipment and a mobility management entity (mobility management entity, MME) according to K ASME , respectively.
- MME mobility management entity
- K ASME mobility management entity
- Security protection refers to data encryption/decryption, and/or integrity protection/verification, etc., to avoid risks such as data leakage or data tampering.
- Encryption/Decryption Protect the confidentiality of data during transmission (so it can also be called confidentiality protection). Confidentiality means that the real content cannot be directly seen. Encryption protection can generally be achieved by encrypting data using a key and an encryption algorithm.
- Integrity protection/verification to determine whether the content of the message has been changed during the delivery process, and it can also be used as an identity verification to confirm the source of the message.
- Anti-replay protection/verification determine whether the message is replayed to confirm the freshness of the message.
- the 5G mobile communication system puts forward more stringent requirements in all aspects for various network performance indicators. For example, the capacity index has been increased by 1000 times, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
- the integrated access and backhaul (IAB) technology provides an idea for solving the above two problems: both the access link and the backhaul link use a wireless transmission scheme to avoid Fiber deployment.
- an IAB node can provide wireless access services for terminal equipment, and connect to an IAB donor (donor) through a wireless backhaul link to transmit user service data.
- the IAB node is connected to the core network via the host node through a wired link.
- the IAB node is connected to the core network (5G core, 5GC) of the 5G network through a wired link through the host node.
- the IAB node is connected to the evolved packet core (EPC) via the evolved NodeB (eNB) on the control plane, and is connected to the EPC via the host node and eNB on the user plane.
- EPC evolved packet core
- eNB evolved NodeB
- the IAB network supports the networking of multi-hop IAB nodes and multi-connection IAB nodes. Therefore, there may be multiple transmission paths between the terminal served by the IAB node and the host node.
- a transmission path may include multiple nodes, such as terminals, one or more IAB nodes, and host nodes.
- the parent node of IAB node 1 is the host node
- IAB node 1 is the parent node of IAB node 2 and IAB node 3
- IAB node 2 and IAB node. 3 is the parent node of IAB node 4
- the parent node of IAB node 5 is IAB node 2.
- the uplink data packets of the terminal can be transmitted to the host node through one or more IAB nodes, and then sent by the host node to the mobile gateway device (such as the user plane function (UPF) network element in the 5G network), and the downlink data The packet will be received by the host node from the mobile gateway device, and then sent to the terminal via one or more IAB nodes.
- the mobile gateway device such as the user plane function (UPF) network element in the 5G network
- a transmission path between the terminal and the host node may include one or more IAB nodes.
- Each IAB node needs to maintain the wireless backhaul link facing the parent node, and also needs to maintain the wireless link with the child nodes.
- a wireless access link is formed between the IAB node and a sub-node (ie, a terminal).
- an IAB node is a node that provides backhaul services for other IAB nodes, there is a wireless backhaul link between the IAB node and child nodes (ie, other IAB nodes).
- Terminal 1 accesses IAB node 4 through a wireless access link
- IAB node 4 accesses IAB node 3 through a wireless backhaul link
- IAB node 3 accesses IAB node 1 through a wireless backhaul link
- IAB node 1 accesses IAB node 1 through a wireless backhaul link.
- the transmission link is connected to the host node.
- the IAB node may include a mobile terminal (mobile terminal, MT) and a centralized unit (distributed unit, DU).
- the MT included in the IAB node has part or all of the functions of the terminal equipment.
- the IAB node faces its parent node, the IAB node can be regarded as a terminal device, that is, the IAB node plays the role of the MT.
- the IAB node faces its child nodes (the child node may be a terminal or a terminal part of another IAB node), the IAB node can be regarded as a network device, that is, the IAB node plays the role of DU.
- an IAB node can establish a backhaul connection with at least one parent node of the IAB node through the MT part.
- the DU part of an IAB node can provide access services for terminal equipment or the MT part of other IAB nodes.
- An IAB host can be a complete entity.
- the IAB host may also be a centralized unit (centralized unit, CU) (herein referred to as Donor-CU, also referred to as CU) and a distributed unit (distributed unit, DU) (herein referred to as Donor-DU)
- the isolated form, the IAB host consists of Donor-CU and Donor-DU.
- the Donor-CU may also be a form in which the user plane (UP) (herein referred to as CU-UP) and the control plane (Control plane, CP) (herein referred to as CU-CP) are separated, that is, the Donor-CU CU consists of CU-CP and CU-UP.
- UP user plane
- CP Control plane
- the IAB host may have other names, such as a host base station, a host node, a DgNB (that is, a donor gNB), etc., which are not limited.
- the F1 interface may also be called an F1* interface, which is not limited.
- the F1 interface supports the user plane protocol of F1-U (or F1*-U) and the control plane protocol of F1-C (or F1*-C).
- FIG. 3 is a schematic diagram of a user plane protocol stack in an IAB network according to an embodiment of the present application.
- the user plane protocol stack includes one or more of the following protocol layers: general packet radio service (GPRS) tunneling protocol user plane (GTP-U), user plane Datagram protocol (user datagram protocol, UDP), internet protocol (internet protocol, IP), wireless backhaul link introduction backhaul adaptation protocol (Backhaul Adaptation Protocol, BAP), radio link control (radio link control, RLC) , media access control (media access control, MAC), physical layer (PHY layer).
- GPRS general packet radio service
- GTP-U general packet radio service
- UDP user plane Datagram protocol
- IP internet protocol
- BAP wireless backhaul link introduction backhaul adaptation protocol
- RLC radio link control
- media access control media access control
- MAC physical layer
- PHY layer physical layer
- the L2 layer may be the data link layer in the open systems interconnection (open systems interconnection, OSI) reference model
- the L1 layer
- FIG. 4 is a schematic diagram of a control plane protocol stack in an IAB network according to an embodiment of the present application.
- the control plane protocol stack includes one or more of the following protocol layers: F1 application protocol (F1 application protocol, F1AP), stream control transport protocol (stream control transport protocol, SCTP), IP, BAP, RLC, MAC, PHY, etc.
- an Internet Protocol Security (IPSec) secure connection may be established between the IAB node and the IAB host.
- IKE internet key exchange
- PSK pre-shared secret key
- the IAB node and the IAB host can configure the PSK in advance and use it as an authentication credential in the subsequent IPSec establishment process.
- IAB node and IAB donor can calculate K IAB as PSK.
- the IAB node can be made to support dual connectivity (DC) to deal with possible abnormal situations in the wireless backhaul link, such as wireless backhaul link interruption or blocking etc.
- DC dual connectivity
- FIG. 5 is a schematic diagram of IAB node using EN-DC mode.
- the 4G base station ie eNB
- the IAB donor acts as the secondary base station.
- EPC evolved packet core
- the IAB donor-CU-UP can be connected to the EPC through the S1-U interface, for example, connected to a service gateway (serving gateway, SGW).
- SGW service gateway
- the process of generating the K IAB between the IAB node and the IAB donor includes the following steps:
- the IAB node accesses the core network through the MeNB.
- both the IAB node and the MeNB store the same K eNB .
- the MeNB After the MeNB generates the S-Kgnb, the MeNB sends an SN additional/modification request message to the IAB donor.
- the SN additional/modification request message includes S-Kgnb.
- S-Kgnb is derived from K eNB .
- the MeNB can optionally delete the S-Kgnb. That is, the purpose of calculating the S-Kgnb by the MeNB is to send it to the secondary base station for use, but the MeNB does not use the S-Kgnb.
- the IAB donor sends an SN additional/modification request ACK message to the MeNB.
- the MeNB sends an RRC reconfiguration message to the IAB node.
- the IAB node after receiving the RRC reconfiguration message, the IAB node can derive the S-Kgnb according to the K eNB .
- the IAB node sends an RRC reconfiguration complete message to the MeNB.
- the MeNB sends an SN reconfiguration complete message to the IAB donor.
- the IAB node generates an IAB key according to S-Kgnb.
- IAB donor generates an IAB key according to S-Kgnb.
- the IAB donor can and can only be the secondary base station, so the input key to generate the IAB key can be S-Kgnb, that is, the secondary base station uses S-Kgnb to deduce the IAB key.
- the IAB node and the IAB donor can use the same IAB key as the authentication credential to establish a secure tunnel.
- IAB node can also adopt other types of dual connections (such as NE-DC, NR-DC, NGEN-DC, etc.).
- FIG. 7 is a schematic diagram of the IAB node adopting the NE-DC mode.
- the IAB donor CU-UP is connected to the user plane network element in the 5G core network (5G core, 5GC) through the NG-U interface, and the IAB donor CU-CP Connect to the control plane network elements in the 5GC through the NG-C interface.
- the IAB donor CU-CP Connects to the control plane network elements in the 5GC through the NG-C interface.
- FIG 8 is a schematic diagram of the IAB node adopting the NR-DC mode.
- the IAB node when the IAB node works in NR-DC mode, the IAB node connects an IAB donor and a gNB.
- the IAB donor CU-UP is connected to the user plane network element in the 5GC through the NG-U interface
- the IAB donor CU-CP is connected to the control plane network element in the 5GC through the NG-C interface.
- Figure 9 is a schematic diagram of the IAB node adopting the NGEN-DC mode.
- the primary base station connected to the IAB node is the NG-eNB
- the secondary base station connected to the IAB node is the IAB donor.
- the IAB donor CU-UP is connected to the user plane network element in the 5GC through the NG-U interface.
- the industry does not provide a technical solution for IAB node and IAB donor to generate KIAB .
- the KIAB generated by the IAB node may be different from the KIAB generated by the IAB donor, so that the IPsec secure connection cannot be normally established between the IAB node and the IAB donor.
- the IAB node uses NR-DC to access the network, and both the primary base station and the secondary base station are gNBs.
- the IAB donor may be the primary base station or the secondary base station.
- the IAB node establishes a connection with the IAB donor based on the IP address, but does not need to sense whether the IAB donor is the primary base station or the secondary base station. In this way, when the IAB donor is the secondary base station, the IAB donor may use the secondary base station key to calculate the IAB key, while the IAB node may use the primary base station key to calculate the IAB key, resulting in IAB donor and IAB node.
- the IAB keys maintained by each are not the same.
- the IAB donor may use the master base station key to calculate the IAB key
- the IAB node may use the secondary base station key to calculate the IAB key, resulting in IAB donor and IAB node respectively.
- the IAB keys maintained are not the same.
- the embodiments of the present application provide three technical solutions.
- the following is an introduction to the ideas of the three technical solutions.
- the idea of the technical solution 1 is: in the scenario of other types of dual connections (such as NE-DC, NR-DC or NGEN-DC) except EN-DC, both the IAB donor and the IAB node use the master base station key to Calculate K IAB .
- the idea of technical solution 3 is: in the scenario of other types of dual connections (such as NE-DC, NR-DC or NGEN-DC) other than EN-DC, the IAB donor and the IAB node are based on the local encryption of the IAB donor. key to calculate K IAB .
- the primary base station is an IAB donor
- the local key is the primary base station key
- the secondary base station is an IAB donor
- the local key is the secondary base station key.
- the above technical solutions 1 to 3 can all ensure that the IAB donor and the IAB node maintain the same K IAB . It should be understood that, in practical applications, any one of the technical solutions from the above-mentioned technical solutions 1 to 3 can be selected for implementation.
- the master base station key is used to secure the communication between the master base station (eg, the first access network device hereinafter) and the first device.
- the master base station key may be K gNB , K RRCint , K RRCenc , K UPint , or K UPenc or the like.
- KRRCint, K RRCenc , KUPint and K UPenc are all derived from K gNB .
- K RRCint is used to perform integrity protection on the RRC signaling between the master base station and the first device.
- K RRCenc is used to encrypt and protect the RRC signaling between the master base station and the first device.
- K UPint is used for integrity protection of user plane data between the primary base station and the first device.
- K UPenc is used to encrypt and protect user plane data between the primary base station and the first device.
- the master base station key is uniformly described here, and will not be repeated below.
- the secondary base station key is used to secure the communication between the secondary base station (eg, the second access network device or the third access network device hereinafter) and the first device.
- the secondary base station key may be Ksn, SK RRCint , SK RRCenc , SK UPint , or SK UPenc , etc., which is not limited.
- SK RRCint , SK RRCenc , SK UPint , or SK UPenc are obtained through Ksn deduction.
- SK RRCint is used for integrity protection of RRC signaling between the secondary base station and the first device.
- the SK RRCenc is used to encrypt and protect the RRC signaling between the secondary base station and the first device.
- SK UPint is used for integrity protection of user plane data between the secondary base station and the first device.
- SK UPenc is used to encrypt and protect user plane data between the secondary base station and the first device.
- the master base station key is uniformly described here, and will not be repeated below.
- the network side can refer to the embodiment shown in FIG. 10 to obtain the IAB key
- the IAB node can refer to the embodiment shown in FIG. 11 to obtain the IAB key.
- a method for generating a key includes the following steps:
- the first access network device determines that the first device registered to the 5G core network through the first access network device is an IAB node.
- the first access network device receives the IAB indication information sent by the first device, and the IAB indication information is used to indicate that the first device is an IAB node. Therefore, the first access network device can learn that the first device is an IAB node according to the IAB indication information.
- the IAB indication information may be recorded as "IAB-indication".
- the first access network device receives the IAB authorization information of the core network element, and the IAB authorization information is used to indicate that the first device has the authority to act as an IAB node. Therefore, the first access network device can learn that the first device is an IAB node according to the IAB authorization information.
- the IAB authorization information may be recorded as "IAB-authorized".
- the core network element may actively send the IAB authorization information to the first access network device.
- the core network element may verify the subscription data of the first device according to the request of the first access network device, and determine whether to reply the IAB authorization information to the first access network device.
- both the first access network device and the first device can obtain the same master base station key.
- the first access network device determines whether it has the IAB donor function.
- the first access network device searches whether there is an identifier of the first access network device in the IAB donor configuration information.
- the first access network device determines that it has the IAB donor function.
- the IAB donor configuration information does not have the identifier of the first access network device, the first access network device determines that it does not have the IAB donor function.
- the IAB donor configuration information is used to record the identifiers of one or more access network devices with the IAB donor function.
- the IAB donor configuration information may be configured by an operation and maintenance management (operation administration and maintenance) system or other devices to the first access network device.
- the first access network device may check whether it stores a donor configuration file. When the first access network device stores the donor configuration file, the first access network device may determine that it has the IAB donor function. Otherwise, the first access network device determines that it does not have the IAB donor function.
- the Donor configuration file is used to configure the functions of the access network device as an IAB donor.
- the Donor configuration file may be configured locally by the first access network device, or configured by the OAM system to the first access network device.
- the first access network device when the first access network device does not have the IAB donor function, the first access network device performs the following steps S103-S106. When the first access network device has the IAB donor function, the first access network device executes the following steps S107-S109.
- the first access network device selects the second access network device with the IAB donor function as the secondary base station of the first device.
- the second device pre-configures the first access network device with the identifier of the second access network device. Therefore, in the case where a secondary base station needs to be added to the IAB node (for example, the first device), the first access network device can select the second access network device as the secondary base station according to the identifier of the second access network device.
- the first access network device sends a first request message to the second device, where the first request message includes the identifier of the first device.
- the second device may determine the access network device (that is, the second access network device) that is the IAB donor of the first device. After that, the first access network device receives the first response message sent by the second device, where the first response message includes the identifier of the second access network device. Therefore, the first access network device may select the second access network device as the secondary base station of the first device.
- the identifier of the first device may include a cell-radio network temporary identifier (cell-radio network temporary identifier, C-RNTI), a device number, etc., which are not limited.
- a cell-radio network temporary identifier cell-radio network temporary identifier, C-RNTI
- a device number etc., which are not limited.
- the identifier of the second access network device may include an IP address, a device number, etc., which is not limited.
- the above-mentioned second device may be an OAM system or a core network element, which is not limited.
- the second device has pre-stored the mapping relationship between the first device and the second access network device. Therefore, the second device can find the identifier of the second access network device according to the identifier of the first device and the mapping relationship between the first device and the second access network device.
- Case 2 The second device does not store the mapping relationship between the first device and the second access network device. Therefore, the second device can determine the second access network device according to factors such as topology information.
- the second device since the second device is responsible for determining the second access network device, the second device may send the IP address used by the second access network device to communicate with the IAB node to the first device, so that the first device can communicate with the second device. Access network devices can communicate based on IP addresses.
- the first access network device after selecting the second access network device as the secondary base station, the first access network device will send a secondary base station configuration message to the second access network device, so that the second access network device can know itself as the secondary base station of the first device.
- the secondary base station configuration message may be the SN addition/modification request message in the dual connectivity configuration process shown in FIG. 1 .
- the secondary base station configuration message may include third indication information, where the third indication information is used to indicate that the first device is an IAB node. Therefore, the second access network device can learn that the first device is the IAB node according to the third indication information.
- the second access network device determines whether it has the IAB donor function. When the second access network device determines that it has the IAB donor function, the second access network device needs to acquire K IAB1 from the first access network device.
- the specific implementation manner of the second access network device judging whether it has the IAB donor function can refer to the specific implementation manner of the first access network device judging whether it has the IAB donor function above, which will not be repeated here.
- the first access network device acquires a first key input parameter associated with the second access network device.
- the first key input parameter includes: a first IP address and/or a second IP address.
- the first IP address is the IP address used by the first device to communicate with the IAB donor. Since the first device acts as an IAB node, the first IP address may also be called the IP address of the IAB node, or the IP address of the MT in the IAB node.
- the second IP address is the IP address used by the second access network device to communicate with the IAB node. Since the second access network device serves as the IAB donor of the first device, the second IP address may also be called the IP address of the IAB donor, or the IP address of the CU in the IAB donor.
- any one of the following implementation modes 1-1 or 1-2 may be adopted:
- Implementation Mode 1-1 The first access network device acquires the first IP address from the second device.
- the first response message sent by the second device to the first access network device may further include the first IP address.
- Implementation mode 1-2 The first access network device acquires the first IP address from the second access network device.
- the first access network device sends first indication information to the second access network device, where the first indication information is used to request the first IP address. After that, the first access network device receives the first IP address sent by the second access network device.
- the first indication information may be carried in newly added signaling.
- the first indication information may be carried in existing signaling, such as an SN addition/modification request message.
- the first IP address sent by the second access network device may be borne in the newly added signaling.
- the first IP address sent by the second access network device may be borne in existing signaling, such as an SN addition/modification request ACK message.
- any one of the following implementation modes 2-1 to 2-3 may be adopted:
- Implementation mode 2-1 The first access network device acquires the second IP address from the second device.
- the second device stores the IP addresses of each access network device with the IAB donor function. Therefore, the first response message sent by the second device to the first access network device may further include the second IP address.
- the first access network device may use the IP address of the Xn interface of the second access network device as the second IP address.
- implementation mode 2-2 is generally based on the default IP address of the Xn interface of the access network device in the communication system, which is the IP address of the access network device as the IAB donor.
- the first access network device acquires the second IP address from the second access network device.
- the first access network device sends second indication information to the second access network device, where the second indication information is used to request the second IP address.
- the first access network device receives the second IP address sent by the second access network device.
- the second indication information may be carried in newly added signaling.
- the second indication information may be carried in existing signaling, such as an SN addition/modification request message.
- the second indication information and the first indication information may be carried in the same signaling or in different signaling.
- the second indication information and the first indication information may be integrated into one indication information, such as parameter request indication information (para_request_indicator).
- parameter request indication information is used to request the IP address of the IAB donor and the IP address of the IAB node.
- the second IP address sent by the second access network device may be borne in the newly added signaling.
- the second IP address sent by the second access network device may be borne in existing signaling, such as an SN addition/modification request ACK message.
- the first access network device generates a first IAB key K IAB1 according to the first key input parameter and the master base station key.
- K IAB1 is used to establish a secure tunnel between the second access network device and the first device.
- the first access network device sends K IAB1 to the second access network device.
- K IAB1 may be carried in a newly added message.
- the sending timing of the newly added message for carrying KIAB1 may be located after the SN additional/modification Request ACK message, or after the SN reconfiguration complete message.
- K IAB1 can be carried in an existing message.
- the first access network device may send an SN reconfiguration complete message to the second access network device, where the SN reconfiguration complete message includes K IAB1 .
- the second access network device After receiving the K IAB1 , the second access network device will save the K IAB1 .
- the primary base station that is, the first access network device
- the primary base station can actively generate the KIAB with the master base station key , and send the K IAB to the secondary base station to ensure that the IAB donor and the IAB node maintain the same K IAB .
- the first access network device selects the third access network device as the secondary base station of the first device.
- the first access network device selects an appropriate access network device (that is, the first access network device) from the surrounding access network devices according to factors such as the location of the first device and the measurement report of the first device. three access network devices) as the secondary base station of the first device.
- this embodiment of the present application does not limit whether the third access network device has the IAB donor function. That is, the third access network device may or may not have the IAB donor function.
- the first access network device with the IAB donor function is the IAB donor of the first device.
- the first access network device acquires a second key input parameter associated with the first access network device.
- the second key input parameter includes the first IP address and the third IP address.
- the third IP address is the IP address used by the first access network device to communicate with the IAB node.
- the first access network device may acquire the third IP address locally (ie, the database of the first access network device).
- the first access network device serving as the IAB donor assigns the first IP address to the first device. Based on this design, the first access network device also needs to send the first IP address to the first device.
- the first access network device may obtain the first IP address from the second device or the first device.
- the first access network device sends an IP address request message to the first device. After that, the first access network device receives the IP address notification message sent by the first device, where the IP address notification message includes the first IP address.
- the first access network device generates a second IAB key K IAB2 according to the second key input parameter and the master base station key.
- K IAB2 is used to establish a secure tunnel between the first access network device and the first device.
- the first access network device will save the K IAB2 .
- the primary base station ie, the first access network device
- the primary base station actively generates K IAB with the primary base station key to ensure that the IAB donor and the IAB node maintain the same KIAB .
- a method for generating a key provided by an embodiment of the present application is applied in a scenario where a first device (IAB node) is connected to a primary base station and a secondary base station.
- the method includes the following steps:
- the IAB node determines the type of dual connection according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station, and the communication standard supported by the core network.
- the IAB node determines the communication standard supported by the main base station, which may be specifically implemented as: the supported communication standard.
- the configuration parameters in the broadcast message include one or more of the following: base station identifier, logical cell identifier, physical cell identifier, uplink frequency band or downlink frequency band. It should be understood that when the configuration parameters in the broadcast message belong to the configuration parameters of the 5G communication system, the IAB node can determine that the primary base station supports the 5G communication standard. Or, when the configuration parameters in the just broadcast message belong to the configuration parameters of the 4G communication system, the IAB node can determine that the primary base station supports the 4G communication standard.
- the 4G frequencies are A1, A2, and A3, and the 5G frequencies are B1, B2, and B3.
- the IAB node can determine that the main base station supports the 5G communication standard.
- the IAB node determines the communication standard supported by the secondary base station, which may be specifically implemented as follows: the IAB node receives an RRC reconfiguration message sent by the primary base station, where the RRC reconfiguration message is used to configure the radio bearer between the IAB node and the secondary base station,
- the RRC reconfiguration message includes secondary cell group configuration information.
- the IAB node determines the communication standard supported by the secondary base station according to the configuration information of the secondary cell group. It should be understood that when the configuration information of the secondary cell group belongs to the 5G communication standard, the IAB node can determine that the secondary base station supports the 5G communication standard. Alternatively, when the configuration information of the secondary cell group belongs to the 4G communication standard, the IAB node may determine that the secondary base station supports the 4G communication standard.
- the configuration information of the secondary cell group belonging to the 5G communication standard may be recorded as nr-SecondaryCellGroupConfig or sourceSCG-NR-Config.
- the configuration information of the secondary cell group belonging to the 4G communication standard may be recorded as sourceSCG-EUTRA-Config.
- the IAB node determines the communication standard supported by the core network, which may be specifically implemented as: the IAB node receives the broadcast message sent by the main base station. The IAB node determines the communication standard supported by the core network according to the cell configuration information in the broadcast message. It should be understood that if the cell configuration information in the broadcast message belongs to the 5G communication standard, the IAB node determines that the core network supports the 5G communication standard. If the cell configuration information in the broadcast message belongs to the 4G communication standard, the IAB node determines that the core network supports the 4G communication standard.
- the cell configuration information may include cell access related information (cellAccessRelatedInfo).
- the cell access related information belonging to the 5G communication standard may be recorded as cellAccessRelatedInfo-5GC.
- the cell access related information belonging to the 4G communication standard may be recorded as cellAccessRelatedInfo-EUTRA-EPC.
- the IAB node determines the type of dual connection, including one of the following:
- the IAB node determines that the type of dual connection is NE-DC.
- the IAB node When the type of dual connectivity is NE-DC, NR-DC or NGEN-DC, the IAB node generates K IAB according to the master base station key.
- the IAB node generates K IAB according to the master base station key and key input parameters.
- the key input parameters include the IP address of the IAB donor and the IP address of the IAB node.
- the IAB node can obtain the IP address of the IAB donor from the second device.
- the second device may be an OAM system or a core network element.
- the IAB node can obtain the IP address of the IAB node from the second device.
- the second device may encapsulate the IP address of the IAB node and the IP address of the IAB donor into a message, and send the message to the IAB node.
- the IAB node can obtain the IP address of the IAB node from the primary base station or the secondary base station.
- the master base station acts as an IAB donor, and the master base station assigns an IP address to the IAB node.
- the IAB node sends an IP address request message to the main base station; after that, the IAB node receives the IP address notification message sent by the main base station, where the IP address notification message includes the IP address of the IAB node.
- the master base station acts as an IAB donor, and the master base station assigns an IP address to the IAB node. Therefore, the IAB node receives the RRC reconfiguration message sent by the master base station, where the RRC reconfiguration message includes the IP address of the IAB node.
- the secondary base station acts as an IAB donor, and the secondary base station allocates an IP address to the IAB node.
- the IAB node can send an IP address request message to the secondary base station; after that, the IAB node receives an IP address notification message sent by the secondary base station, where the IP address notification message includes the IP address of the IAB node.
- the IAB node will save the K IAB after generating the K IAB .
- the IAB node can accurately determine the type of dual connectivity used by the IAB node according to the communication standard supported by the primary base station, the communication standard supported by the secondary base station, and the communication standard supported by the core network. Furthermore, when the type of dual connectivity is NE-DC, NR-DC or NGEN-DC, the IAB node can generate K IAB according to the master base station key to ensure that the IAB donor and the IAB node maintain the same K IAB .
- the IAB node when the type of dual connectivity is EN-DC, the IAB node generates K IAB according to the secondary base station key and the key input parameters.
- the first device (that is, the IAB node) registers with the network through the first access network device that does not have the IAB donor function. After that, the first access network device selects the second access network device with the IAB donor function as the secondary base station for the first device, and the second access network device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- a first device registers with a network through a first access network device.
- the first device may perform procedures such as authentication and security context negotiation.
- the first device and the first access network device acquire the same AS layer key.
- the AS layer key between the first device and the first access network device is used for security protection of the AS layer communication between the first device and the first access network device.
- the AS layer key between the first device and the first access network device may be referred to as the primary base station key.
- the first access network device determines that the first device is an IAB node.
- the first access network device determines whether it has the IAB node function.
- the first access network device selects the second access network device with the IAB donor function as the secondary base station of the first device.
- the first access network device sends an SN addition/modification request message to the second access network device.
- the SN addition/modification request message includes the third indication information.
- the third indication information is used to indicate that the first device is an IAB node.
- the second access network device can learn that the first device is an IAB node based on the third indication information. Furthermore, since the second access network device has the IAB donor function, the second access network device can serve as the IAB donor of the first device, and assign the IP address of the IAB node to the first device. It should be understood that the IP address of the IAB node here is the first IP address in the embodiment shown in FIG. 10 .
- the SN addition/modification request message may include first indication information and second indication information in addition to related information elements in the prior art.
- the first access network device receives the SN addition/modification request ACK message sent by the second access network device.
- the SN addition/modification request ACK message includes the IP address of the IAB donor and the IP address of the IAB node.
- the first access network device generates K IAB according to the master base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the first access network device sends an RRC reconfiguration message to the first device.
- the RRC reconfiguration message includes the IP address of the IAB node.
- the first access network device receives the RRC reconfiguration complete message sent by the first device.
- the first access network device sends an SN reconfiguration complete message to the second access network device.
- the SN reconfiguration complete message includes K IAB .
- the second access network device obtains KIAB from the SN reconfiguration complete message. Afterwards, the second access network device will save K IAB .
- the first device receives an IP address notification (IP address notification) message sent by the second device.
- IP address notification IP address notification
- the IP address notification message includes the IP address of the IAB donor.
- step S311 is only after step S304, and the specific execution timing of step S312 is not limited.
- the execution timing of step S311 may be before step S310.
- the first device determines the type of dual connection.
- the first device When the type of dual connectivity is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the master base station key, the IP address of the IAB donor and the IP address of the IAB node.
- steps S312-S313 may refer to the embodiment shown in FIG. 11 , which will not be repeated here.
- steps S312-S313 may be executed at any time after step S308, which is not limited in this embodiment of the present application.
- the first device and the second access network device establish a secure tunnel by using the K IAB .
- the primary base station when the secondary base station is the IAB donor, the primary base station generates KIAB with the primary base station key, and transmits KIAB to the secondary base station.
- the IAB node generates K IAB with the master base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device that is, the IAB node registers with the network through the first access network device that does not have the IAB donor function. After that, the first access network device selects the second access network device with the IAB donor function as the secondary base station for the first device. The second device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- S401-S404 are the same as steps S301-S304, and the specific description can refer to the embodiment shown in FIG. 12, and details are not repeated here.
- the first device receives the first IP address notification message sent by the second device.
- the first IP address notification message includes the IP address of the IAB donor and the IP address of the IAB node.
- step S405 may be performed before or after any one of steps S406-S410.
- the first access network device sends an SN addition/modification request message to the second access network device.
- the SN addition/modification request message includes the third indication information.
- the third indication information is used to indicate that the first device is an IAB node.
- the SN addition/modification request message may include first indication information and second indication information in addition to related information elements in the prior art.
- the first access network device receives the SN addition/modification request ACK message sent by the second access network device.
- the first access network device sends an RRC reconfiguration message to the first device.
- the first access network device receives the RRC reconfiguration complete message sent by the first device.
- the first access network device sends an SN reconfiguration complete message to the second access network device.
- the first device sends a second IP address notification message to the second access network device.
- the second IP address notification message includes the IP address of the IAB node.
- the second access network device sends an SN key request message to the first access network device.
- the SN key request message is used to request K IAB .
- the SN key request message includes the IP address of the IAB donor and the IP address of the IAB node.
- the first access network device generates K IAB according to the master base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the first access network device sends an SN key response message to the second access network device.
- the SN key response message includes K IAB .
- the first device determines the type of dual connection.
- the first device When the dual connection type is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the master base station key, the IP address of the IAB donor and the IP address of the IAB node.
- the first device and the second access network device establish a secure tunnel by using the K IAB .
- the primary base station when the secondary base station is the IAB donor, the primary base station generates KIAB with the primary base station key, and transmits KIAB to the secondary base station.
- the IAB node generates K IAB with the master base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device (that is, the IAB node) registers with the network through the first access network device with the IAB donor function. Therefore, the first access network device serves as the IAB donor of the first device, and the first access network device allocates the IP address of the IAB node to the first device. The first access network device selects a third access network device as the secondary base station for the first device.
- a method for generating a key provided in the embodiment of the present application, the method comprises the following steps:
- a first device registers with a network through a first access network device.
- the first access network device determines that the first device is an IAB node.
- the first access network device If the first access network device has the IAB node function, the first access network device sends a notification message to the second device.
- the notification message is used to indicate that the first device is registered to the network through the first access network device with the IAB donor function.
- the notification message is used to indicate that the first access network device is the IAB donor of the first device.
- the notification message may include the identifier of the first device and the identifier of the first access network device.
- the second device sends an IP address notification message to the first device.
- the IP address notification information includes the IP address of the IAB donor.
- step S504 may be executed at any time before step S513, which is not limited in this embodiment of the present application.
- the first access network device selects a third access network device as the secondary base station of the first device.
- the first access network device sends an SN addition/modification request message to the third access network device.
- the first access network device receives the SN addition/modification request ACK message sent by the third access network device.
- the first access network device sends an RRC reconfiguration message to the first device.
- the RRC reconfiguration message may include the IP address of the IAB node.
- the first access network device receives the RRC reconfiguration complete message sent by the first device.
- the first access network device sends an SN reconfiguration complete message to the third access network device.
- the first access network device generates K IAB according to the master base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- step S511 may be performed before or after any one of steps S504-S510.
- the first device determines the type of dual connection.
- the first device When the dual connection type is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the master base station key, the IP address of the IAB donor and the IP address of the IAB node.
- the first device and the first access network device establish a secure tunnel by using the K IAB .
- both the master base station and the IAB node when the master base station is the IAB donor, both the master base station and the IAB node generate K IAB with the master base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device (that is, the IAB node) registers with the network through the first access network device with the IAB donor function. Therefore, the first access network device acts as the IAB donor of the first device.
- the first access network device selects a third access network device as the secondary base station for the first device.
- the second device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key provided in the embodiment of the present application, the method comprises the following steps:
- a first device registers with a network through a first access network device.
- the first access network device determines that the first device is an IAB node.
- the first access network device If the first access network device has the IAB node function, the first access network device sends a notification message to the second device.
- the notification message is used to indicate that the first device is registered to the network through the first access network device with the IAB donor function.
- the notification message is used to indicate that the first access network device is the IAB donor of the first device.
- the second device sends a first IP address notification message to the first device.
- the first IP address notification message includes the IP address of the IAB node and the IP address of the IAB donor.
- steps S603-S604 may be performed before or after any one of steps S606-S610.
- the first access network device selects a third access network device as the secondary base station of the first device.
- the first access network device sends an SN addition/modification request message to the third access network device.
- the first access network device receives the SN addition/modification request ACK message sent by the third access network device.
- the first access network device sends an RRC reconfiguration message to the first device.
- the first access network device receives the RRC reconfiguration complete message sent by the first device.
- the first access network device sends an SN reconfiguration complete message to the third access network device.
- the first access network device receives the second IP address notification message sent by the first device.
- the second IP address notification message includes the IP address of the IAB node.
- the first access network device generates K IAB according to the master base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- steps S611-S612 may be performed at any time after step S604, which is not limited in this embodiment of the present application.
- the first device determines the type of dual connection.
- the first device When the type of dual connectivity is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the master base station key, the IP address of the IAB donor and the IP address of the IAB node.
- the first device and the first access network device establish a secure tunnel by using the K IAB .
- both the master base station and the IAB node when the master base station is the IAB donor, both the master base station and the IAB node generate K IAB with the master base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the network side can obtain the IAB key according to the embodiment shown in FIG. 16 , and the IAB node can follow the embodiment shown in FIG. 17 . to get the IAB key.
- a method for generating a key includes the following steps:
- the first access network device determines that the first device registered to the network through the first access network device is an IAB node.
- the first access network device determines whether it has the IAB node function.
- steps S701-S702 are similar to steps S101-S102 in FIG. 10 , and reference may be made to the description in the embodiment shown in FIG. 10 for the specific implementation manner.
- the first access network device may generate the secondary base station key according to the primary base station key and the SN count value.
- the first access network device selects the second access network device with the IAB donor function as the secondary base station of the first device.
- the first access network device sends a secondary base station configuration message to the second access network device.
- the secondary base station configuration message is used to configure the second access network device as the secondary base station of the first device.
- the secondary base station configuration message includes third indication information and a secondary base station key.
- the third indication information is used to indicate that the first device is an IAB node.
- the second access network device can learn that the first device is the IAB node according to the third indication information. Further, the second access network device determines whether it has the IAB donor function. In the case that the second access network device has the IAB donor function, the second access network device may consider itself to be the IAB donor of the first device, so that the second access network device may perform the following step S705.
- the second access network device generates K IAB1 according to the secondary base station key.
- the second access network device generates K IAB1 according to the secondary base station key and the first key input parameter.
- the first key input parameter includes a first IP address and a second IP address.
- the first IP address is the IP address used by the first device to communicate with the IAB donor.
- the second IP address is the IP address used by the second access network device to communicate with the IAB node.
- the second access network device may acquire the second IP address from its own database.
- the second access network device may determine the first IP address. Or, the second access network device obtains the first IP address from the first device or the second device.
- the secondary base station that is, the second access network device
- the secondary base station actively uses the secondary base station key to generate K IAB to ensure that the IAB donor and the IAB node maintain the same KIAB .
- the first access network device selects the third access network device as the secondary base station of the first device.
- the first access network device generates K IAB2 according to the secondary base station key.
- the first access network device generates K IAB2 according to the secondary base station key and the second key input parameter.
- the second key input parameter includes the first IP address and the third IP address.
- the first IP address is the IP address used by the first device to communicate with the IAB donor.
- the third IP address is the IP address used by the first access network device to communicate with the IAB node.
- the first access network device may acquire the third IP address from its own database.
- the first access network device may determine the first IP address. Or, the first access network device obtains the first IP address from the first device or the second device.
- the primary base station ie, the first access network device
- the primary base station actively uses the secondary base station key to generate K IAB to ensure that the IAB donor and the IAB node maintain the same KIAB .
- a method for generating a key provided by an embodiment of the present application is applied in a scenario where an IAB node is connected to a primary base station and a secondary base station.
- the method includes the following steps:
- step S801 which is the same as step S20 , and the specific description thereof may refer to the embodiment shown in FIG. 11 , which will not be repeated here.
- the IAB node When the type of dual connection is NE-DC, NR-DC or NGEN-DC, the IAB node generates K IAB according to the secondary base station key.
- the IAB node can deduce the key of the secondary base station according to the key of the primary base station.
- the IAB node generates K IAB according to the secondary base station key and the key input parameter.
- step S202 for the specific introduction and acquisition method of the key input parameter, reference may be made to the relevant description of step S202 in the embodiment shown in FIG. 11 , and details are not repeated here.
- the IAB node in the NE-DC, NR-DC or NGEN-DC scenario, it is ensured that the IAB node generates KIAB with the secondary base station key, thereby ensuring that the IAB donor and the IAB node maintain the same KIAB .
- the first device (that is, the IAB node) registers with the network through the first access network device that does not have the IAB donor function. After that, the first access network device selects the second access network device with the IAB donor function as the secondary base station for the first device, and the second access network device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- the first device registers with the network through the first access network device.
- the first access network device determines that the first device is an IAB node.
- the first access network device determines whether it has the IAB node function.
- the first access network device selects the second access network device with the IAB donor function as the secondary base station of the first device.
- the first access network device may deduce the secondary base station key according to the primary base station key and the SN count value.
- the first access network device sends an SN addition/modification request message to the second access network device.
- the SN addition/modification request message includes the secondary base station key and the third indication information.
- the third indication information is used to indicate that the first device is an IAB node.
- the second access network device may determine whether it has the IAB donor function. In the case that the second access network device has the IAB donor function, the second access network device can be considered as the IAB donor of the first device, so the second access network device needs to perform the following step S910.
- the first access network device receives the SN addition/modification request ACK message sent by the second access network device.
- the first access network device sends an RRC reconfiguration message to the first device.
- the RRC reconfiguration message is used to configure the radio bearer between the second access network device and the first device. Therefore, based on the RRC reconfiguration message, the first device can learn that the second access network device is the secondary base station.
- the RRC reconfiguration message also includes the SN count value. Therefore, the first device can deduce the secondary base station key according to the primary base station key and the SN count value.
- the first access network device receives the RRC reconfiguration complete message sent by the first device.
- the first access network device sends an SN reconfiguration complete message to the second access network device.
- the second access network device can establish an RRC connection with the first device, so that the second access network device can communicate directly with the first device.
- the second access network device generates K IAB according to the secondary base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the second access network device obtains the IP address of the IAB donor locally. And, the second access network device allocates the IP address of the IAB node to the first device.
- step S910 may be executed at any time after step S905, which is not limited in this embodiment of the present application.
- the second access network device sends a first IP address notification message to the first device.
- the first IP address notification message includes the IP address of the IAB node.
- the second device sends a second IP address notification message to the first device.
- the second IP address notification message includes the IP address of the IAB donor.
- step S912 may be executed at any time after step S904, which is not limited in this embodiment of the present application.
- the first device can obtain the IP address of the IAB donor and the IP address of the IAB node.
- the first device determines the type of dual connection.
- the first device When the dual connectivity type is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the secondary base station key, the IP address of the IAB donor and the IP address of the IAB node.
- the first device and the second access network device establish a secure tunnel by using the K IAB .
- the secondary base station when the secondary base station is the IAB donor, the secondary base station generates KIAB with the secondary base station key, and the IAB node generates KIAB with the secondary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device that is, the IAB node registers with the network through the first access network device that does not have the IAB donor function. After that, the first access network device selects the second access network device with the IAB donor function as the secondary base station for the first device. The second device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- a first device registers with a network through a first access network device.
- the first access network device determines that the first device is an IAB node.
- the first access network device determines whether it has an IAB node function.
- the first access network device selects the second access network device with the IAB donor function as the secondary base station of the first device.
- the second device sends a first IP address notification message to the first device.
- the first IP address notification message includes the IP address of the IAB node and the IP address of the IAB donor.
- step S1005 may be executed at any time after step S1004 and before step S1011, which is not limited in this embodiment of the present application.
- the first access network device sends an SN addition/modification request message to the second access network device.
- the SN addition/modification request message includes the secondary base station key and the third indication information.
- the third indication information is used to indicate that the first device is an IAB node.
- the second access network device may determine whether it has the IAB donor function. In the case that the second access network device has the IAB donor function, the second access network device can be considered as the IAB donor of the first device, so the second access network device needs to perform the following step S1012.
- the first access network device receives the SN addition/modification request ACK message sent by the second access network device.
- the first access network device sends an RRC reconfiguration message to the first device.
- the RRC reconfiguration message is used to configure the radio bearer between the second access network device and the first device. Therefore, based on the RRC reconfiguration message, the first device can learn that the second access network device is the secondary base station.
- the RRC reconfiguration message also includes the SN count value. Therefore, the first device can deduce the secondary base station key according to the primary base station key and the SN count value.
- the first access network device receives the RRC reconfiguration complete message sent by the first device.
- the first access network device sends an SN reconfiguration complete message to the second access network device.
- the second access network device can establish an RRC connection with the first device, so that the second access network device can communicate directly with the first device.
- the first device sends a second IP address notification message to the second access network device.
- the second IP address notification message includes the IP address of the IAB donor.
- the second access network device generates K IAB according to the secondary base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the second access network device obtains the IP address of the IAB donor locally. And, the second access network device obtains the IP address of the IAB node according to the second IP address notification message.
- the first device determines the type of dual connection.
- the first device When the type of dual connectivity is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the secondary base station key, the IP address of the IAB donor and the IP address of the IAB node.
- steps S1013-S1014 may be executed at any time after step S1008, which is not limited in this embodiment of the present application.
- the first device and the second access network device establish a secure tunnel by using the K IAB .
- the secondary base station when the secondary base station is the IAB donor, the secondary base station generates KIAB with the secondary base station key, and the IAB node generates KIAB with the secondary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device (that is, the IAB node) registers with the network through the first access network device with the IAB donor function. Therefore, the first access network device serves as the IAB donor of the first device, and the first access network device allocates the IP address of the IAB node to the first device. The first access network device selects a third access network device as the secondary base station for the first device.
- a method for generating a key includes the following steps:
- S1101-S1110 are the same as steps S501-S510, and the specific description can refer to the embodiment shown in FIG. 14, and details are not repeated here.
- the first access network device after selecting the third access network device as the secondary base station, the first access network device will generate the secondary base station key, and send the secondary base station key to the third access network device through the SN addition/modification request message.
- the first access network device generates K IAB according to the secondary base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- step S1111 may be executed at any time after S1105, which is not limited in this embodiment of the present application.
- the first access network device may delete the secondary base station key after performing step S1106.
- step S1111 is performed after step S1106, the first access network device needs to save the secondary base station key before performing step S1106 until step S1111 is performed.
- the first device determines the type of dual connection.
- the first device When the type of dual connectivity is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the secondary base station key, the IP address of the IAB donor and the IP address of the IAB node.
- steps S1112-S1113 may be executed at any time after step S1108, which is not limited in this embodiment of the present application.
- the first device and the first access network device establish a secure tunnel by using the K IAB .
- both the primary base station and the IAB node when the primary base station serves as the IAB donor, both the primary base station and the IAB node generate K IAB with the secondary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device (that is, the IAB node) registers with the network through the first access network device with the IAB donor function. Therefore, the first access network device acts as the IAB donor of the first device.
- the first access network device selects a third access network device as the secondary base station for the first device.
- the second device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- S1201-S1211 are the same as steps S601-S611, and the specific description can refer to the embodiment shown in FIG. 15, and details are not repeated here.
- the first access network device after selecting the third access network device as the secondary base station, the first access network device will generate the secondary base station key, and send the secondary base station key to the third access network device through the SN addition/modification request message.
- the first access network device generates K IAB according to the secondary base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- step S1211 can be executed at any time after step S1204.
- Step S1212 can be executed at any time after steps S1205 and S1211.
- the first access network device may delete the secondary base station key after performing step S1206.
- step S1212 is performed after step S1206, the first access network device needs to save the secondary base station key before performing step S1206 until step S1212 is performed.
- the first device determines the type of dual connection.
- the first device When the dual connectivity type is NE-DC, NR-DC or NGEN-DC, the first device generates K IAB according to the secondary base station key, the IP address of the IAB donor and the IP address of the IAB node.
- steps S1213-S1214 may be performed at any time after step S1208, which is not limited in this embodiment of the present application.
- the first device and the first access network device establish a secure tunnel by using the K IAB .
- both the primary base station and the IAB node when the primary base station serves as the IAB donor, both the primary base station and the IAB node generate K IAB with the secondary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the IAB node can obtain K IAB according to the embodiment shown in FIG. 22 , and the network side can follow the embodiment shown in FIG. 23 . to get KIAB .
- a method for generating a key provided by an embodiment of the present application is applied to a scenario where a first device (IAB node) is connected to a primary base station and a secondary base station, and the method includes the following steps:
- the IAB node learns that the primary base station or the secondary base station is used as the IAB donor.
- step S1301 may adopt any one of the following implementation manners:
- Implementation mode 1 When the IAB node receives the fourth indication information, the IAB node learns that the primary base station is the IAB donor, and the fourth indication information is used to indicate that the primary base station is the IAB donor. Or, when the IAB node receives the fifth indication information, the IAB node learns that the secondary base station is the IAB donor, and the fifth indication information is used to indicate that the secondary base station is the IAB donor.
- the IAB node receives the fourth indication information, which may be specifically implemented as: the IAB node receives the fourth indication information sent by the primary base station.
- the fourth indication information may be carried in the RRC reconfiguration message sent by the primary base station to the IAB node.
- the IAB node receives the fifth indication information, which may be specifically implemented as: the IAB node receives the fifth indication information sent by the primary base station or the secondary base station.
- the fifth indication information may be carried in the RRC reconfiguration message sent by the master base station to the IAB node.
- the fifth indication information may be carried in the AS message sent by the secondary base station to the IAB node.
- Implementation mode 2 When a wireless backhaul link is established between the IAB node and the main base station, the IAB node learns that the main base station is an IAB donor. Or, when a wireless backhaul link is established between the IAB node and the secondary base station, the IAB node learns that the secondary base station is an IAB donor.
- Implementation mode 3 The IAB node obtains the frequency band supported by the primary base station and the frequency band supported by the secondary base station. When the frequency band supported by the primary base station is higher than the frequency band supported by the secondary base station, the IAB node learns that the primary base station is an IAB donor. Or, when the frequency band of the primary base station is lower than the frequency band supported by the secondary base station, the IAB node learns that the secondary base station is an IAB donor.
- Implementation Mode 4 When the IAB node receives the sixth indication information broadcast by the main base station, the IAB node learns that the main base station is an IAB donor. Or, when the IAB node receives the sixth indication information broadcast by the secondary base station, the IAB node learns that the secondary base station is an IAB donor. Wherein, the sixth indication information is used to indicate that the base station has the IAB donor function.
- the IAB node When the primary base station acts as the IAB donor, the IAB node generates K IAB according to the key of the primary base station.
- the IAB node generates K IAB according to the master base station key and key input parameters.
- the master base station key is generated by the IAB node in the process of registering to the network through the master base station.
- the IAB node When the secondary base station acts as the IAB donor, the IAB node generates K IAB according to the secondary base station key.
- the IAB node generates K IAB according to the secondary base station key and the key input parameter.
- the secondary base station key is generated by the IAB node according to the primary base station key.
- the IAB node can use the local key of the IAB donor to generate K IAB to ensure that the IAB node and the IAB donor maintain the same K IAB .
- a method for generating a key includes the following steps:
- the first access network device determines that the first device registered to the network through the first access network device is an IAB node.
- the first access network device determines whether it has the IAB node function.
- steps S1401-S1402 are similar to steps S101-S102 in FIG. 10 , and the specific implementation thereof may refer to the description in the embodiment shown in FIG. 10 .
- the first access network device selects the second access network device with the IAB donor function as the secondary base station of the first device.
- the first access network device sends a secondary base station configuration message to the second access network device.
- the secondary base station configuration message is used to configure the second access network device as the secondary base station of the first device.
- the secondary base station configuration message includes third indication information and a secondary base station key.
- the third indication information is used to indicate that the first device is an IAB node.
- the second access network device may learn that the first device is the IAB node. Therefore, the second access network device can determine whether it has the IAB donor function. In the case that the second access network device has the IAB donor function, the second access network device may consider itself to be the IAB donor of the first device, so that the second access network device may perform the following step S1405.
- the second access network device generates K IAB1 according to the secondary base station key.
- the second access network device generates K IAB1 according to the secondary base station key and the first key input parameter.
- the first key input parameter includes a first IP address and a second IP address.
- the first IP address is the IP address used by the first device to communicate with the IAB donor.
- the second IP address is the IP address used by the second access network device to communicate with the IAB node.
- the second access network device may acquire the second IP address from its own database.
- the second access network device may determine the first IP address. Or, the second access network device obtains the first IP address from the first device or the second device.
- the secondary base station that is, the second access network device
- the secondary base station actively generates K IAB with the secondary base station key to ensure that the IAB donor and the IAB node maintain the same KIAB .
- the first access network device selects the third access network device as the secondary base station of the first device.
- the first access network device generates K IAB2 according to the master base station key.
- the first access network device generates K IAB2 according to the master base station key and the second key input parameter.
- the second key input parameter includes the first IP address and the third IP address.
- the first IP address is the IP address used by the first device to communicate with the IAB donor.
- the third IP address is the IP address used by the first access network device to communicate with the IAB node.
- the first access network device may acquire the third IP address from its own database.
- the first access network device may determine the first IP address. Or, the first access network device obtains the first IP address from the first device or the second device.
- the primary base station ie, the first access network device
- the primary base station actively generates KIAB with the primary base station key to ensure that the IAB donor and the IAB node maintain the same KIAB .
- the first device (that is, the IAB node) registers with the network through the first access network device that does not have the IAB donor function. After that, the first access network device selects the second access network device with the IAB donor function as the secondary base station for the first device, and the second access network device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- S1501-S1512 are similar to steps S901-S912, and the specific description can refer to the embodiment shown in FIG. 18, and details are not repeated here.
- the SN addition/modification request ACK message sent by the second access network device may include fifth indication information.
- the RRC reconfiguration message sent by the first access network device may include fifth indication information, so that the first device can learn about the secondary base station (that is, the second access network device). ) is the IAB donor.
- the first device learns that the second access network device is an IAB donor.
- the first device generates K IAB according to the secondary base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the first device and the second access network device establish a secure tunnel by using the K IAB .
- the secondary base station when the secondary base station is the IAB donor, the secondary base station generates KIAB with the secondary base station key, and the IAB node generates KIAB with the secondary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device that is, the IAB node registers with the network through the first access network device that does not have the IAB donor function. After that, the first access network device selects the second access network device with the IAB donor function as the secondary base station for the first device. The second device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- S1601-S1612 are similar to steps S1001-S1012, and the specific description can refer to the embodiment shown in FIG. 19, and details are not repeated here.
- the SN addition/modification request ACK message sent by the second access network device may include fifth indication information.
- the RRC reconfiguration message sent by the first access network device may include fifth indication information, so that the first device can learn about the secondary base station (that is, the second access network device). ) is the IAB donor.
- the first device learns that the second access network device is an IAB donor.
- the first device generates K IAB according to the secondary base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the first device and the second access network device establish a secure tunnel by using the K IAB .
- the secondary base station when the secondary base station is the IAB donor, the secondary base station generates KIAB with the secondary base station key, and the IAB node generates KIAB with the secondary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device (that is, the IAB node) registers with the network through the first access network device with the IAB donor function. Therefore, the first access network device serves as the IAB donor of the first device, and the first access network device allocates the IP address of the IAB node to the first device. The first access network device selects a third access network device as the secondary base station for the first device.
- a method for generating a key includes the following steps:
- S1701-S1711 are similar to steps S501-S511, and the specific description can refer to the embodiment shown in FIG. 14, and details are not repeated here.
- the RRC reconfiguration message sent by the first access network device may include fourth indication information, so that the first device can know the primary base station (that is, the first access network device). ) is the IAB donor.
- the first device learns that the first access network device is an IAB donor.
- the first device generates K IAB according to the master base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the first device and the first access network device establish a secure tunnel using the K IAB .
- both the primary base station and the IAB node when the primary base station is the IAB donor, both the primary base station and the IAB node generate K IAB with the primary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- the first device (that is, the IAB node) registers with the network through the first access network device with the IAB donor function. Therefore, the first access network device acts as the IAB donor of the first device.
- the first access network device selects a third access network device as the secondary base station for the first device.
- the second device is responsible for allocating the IP address of the IAB node to the first device.
- a method for generating a key includes the following steps:
- S1801-S1812 are similar to steps S601-S612, and the specific description thereof may refer to the embodiment shown in FIG. 15, which will not be repeated here.
- the RRC reconfiguration message sent by the first access network device may include fourth indication information, so that the first device can know the primary base station (that is, the first access network device). ) is the IAB donor.
- the first device learns that the first access network device is an IAB donor.
- the first device generates K IAB according to the master base station key, the IP address of the IAB donor, and the IP address of the IAB node.
- the first device and the first access network device establish a secure tunnel by using the K IAB .
- both the primary base station and the IAB node when the primary base station serves as the IAB donor, both the primary base station and the IAB node generate K IAB with the primary base station key. Therefore, the IAB node and the IAB donor maintain the same K IAB , so that a secure tunnel can be established between the IAB node and the IAB donor according to the K IAB , and it is advantageous for the IAB node to use the dual connection mode for networking.
- a communication apparatus eg, a first device, a first access network device, and a second access network device
- a communication apparatus includes corresponding hardware structures and/or software modules for performing each function.
- the embodiments of the present application can be implemented in hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of the present application.
- the communication device may be divided into functional units according to the foregoing method examples.
- each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
- the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation.
- a communication device provided by an embodiment of the present application includes a processing module 101 and a communication module 102 .
- the processing module 101 is used to support the IAB node to perform steps S201-S202 in FIG. 11 , steps S801-S805 in FIG. S1303, and/or other processing operations that need to be performed by the IAB node in this embodiment of the present application.
- the communication module 102 is used to support the IAB node to perform steps S308, S309, and S311 in FIG. 12 , steps S405, S408, S409, and S411 in FIG. 13 , and/or other communication operations that the IAB node needs to perform in the embodiments of the present application.
- the processing module 101 is configured to support the first access network device to perform steps S101-S105, S107-S109 in FIG. 10 , and in FIG. 16 . steps S701-S703, S706-S707, steps S1401-S1403, S1406-S1407 in FIG. 23, and/or other processing operations that need to be performed by the first access network device in this embodiment of the present application.
- the communication module 102 is configured to support the first access network device to perform step S106 in FIG. 10 , step S704 in FIG. 16 , step S1404 in FIG. 23 , and/or the first access network device in this embodiment of the present application needs to perform other communication operations.
- the processing module 101 is configured to support the second access network device to perform step S705 in FIG. 16 , step S1405 in FIG. 23 , and/or Or other processing operations that need to be performed by the second access network device in the embodiment of the present application.
- the communication module 102 is configured to support the second access network device to perform step S106 in FIG. 10 , step S704 in FIG. 16 , step S1404 in FIG. 23 , and/or the second access network device in this embodiment of the present application needs to perform other communication operations.
- the communication device may further include a storage module 103 for storing program codes and data of the communication device, and the data may include but not limited to original data or intermediate data.
- the processing module 101 may be a processor or a controller, such as a CPU, a general-purpose processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other Programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure.
- a processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
- the communication module 102 may be a communication interface, a transceiver or a transceiver circuit, etc., where the communication interface is a general term, and in a specific implementation, the communication interface may include multiple interfaces, for example, may include: an interface between a base station and a terminal and/or or other interfaces.
- the storage module 103 may be a memory.
- the processing module 101 is a processor
- the communication module 102 is a communication interface
- the storage module 103 is a memory
- the communication device involved in the embodiment of the present application may be as shown in FIG. 29 .
- the communication device includes: a processor 201 , a communication interface 202 , and a memory 203 .
- the communication device may further include a bus 204 .
- the communication interface 202, the processor 201 and the memory 203 can be connected to each other through a bus 204; the bus 204 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus etc.
- the bus 204 can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in FIG. 29, but it does not mean that there is only one bus or one type of bus.
- the embodiment of the present application further provides a computer program product carrying computer instructions, when the computer instructions are executed on the computer, the computer is made to execute the method described in the foregoing embodiments.
- the embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and when the computer instructions are executed on the computer, the computer executes the methods described in the foregoing embodiments.
- an embodiment of the present application further provides a chip, including: a processing circuit and a transceiver pin, where the processing circuit and the transceiver pin are used to implement the method introduced in the foregoing embodiment.
- the processing circuit is used for executing the processing actions in the corresponding method
- the transceiver pins are used for executing the actions of receiving/transmitting in the corresponding method.
- the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server or data center by wire (eg coaxial cable, optical fiber, Digital Subscriber Line, DSL) or wireless (eg infrared, wireless, microwave, etc.).
- the computer-readable storage medium may be any available medium that a computer can access, or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media.
- the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, Digital Video Disc (DVD)), or semiconductor media (eg, Solid State Disk (SSD)) Wait.
- the disclosed system, apparatus and method may be implemented in other manners.
- the apparatus embodiments described above are only illustrative.
- the division of the units is only a logical function division. In actual implementation, there may be other division methods.
- multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
- the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical or other forms.
- the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple devices. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each functional unit may exist independently, or two or more units may be integrated into one unit.
- the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.
- the present application can be implemented by means of software plus necessary general-purpose hardware, and of course hardware can also be used, but in many cases the former is a better implementation manner .
- the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that make contributions to the prior art.
- the computer software products are stored in a readable storage medium, such as a floppy disk of a computer. , a hard disk or an optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application.
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Abstract
Description
双连接类型 | 主基站 | 辅基站 | 核心网 |
EN-DC | 4G基站 | 4G基站 | 4G核心网 |
NE-DC | 5G基站 | 4G基站 | 5G核心网 |
NR-DC | 5G基站 | 5G基站 | 5G核心网 |
NGEN-DC | 4G基站 | 4G基站 | 5G核心网 |
Claims (28)
- 一种密钥生成方法,其特征在于,所述方法包括:第一接入网设备确定通过所述第一接入网设备注册到5G核心网的第一设备为接入回传一体化IAB节点;在需要为所述第一设备选择辅基站的情况下,所述第一接入网设备判断自身是否具备IAB宿主功能;若所述第一接入网设备不具备IAB宿主功能,则所述第一接入网设备选择具备IAB宿主功能的第二接入网设备作为所述第一设备的辅基站;所述第一接入网设备获取第一密钥输入参数;所述第一接入网设备根据主基站密钥和所述第一密钥输入参数,生成第一IAB密钥K IAB1,所述主基站密钥用于对所述第一接入网设备与所述第一设备之间的通信进行安全保护,所述K IAB1用于建立所述第二接入网设备与所述第一设备之间的安全隧道;所述第一接入网设备向所述第二接入网设备发送所述K IAB1。
- 根据权利要求1所述的方法,其特征在于,所述第一接入网设备选择具备IAB宿主功能的第二接入网设备作为所述第一设备的辅基站,包括:所述第一接入网设备向第二设备发送第一请求消息,所述第一请求消息包括所述第一设备的标识;所述第一接入网设备接收所述第二设备发送的第一响应消息,所述第一响应消息包括所述第二接入网设备的标识。
- 根据权利要求1或2所述的方法,其特征在于,所述第一密钥输入参数包括第一IP地址和第二IP地址,所述第一IP地址为所述第一设备用于与IAB宿主通信的IP地址,所述第二IP地址为所述第二接入网设备用于与IAB节点通信的IP地址。
- 根据权利要求3所述的方法,其特征在于,所述第一接入网设备获取第一密钥输入参数,包括:所述第一接入网设备向所述第二接入网设备发送辅基站配置消息,所述辅基站配置消息用于配置所述第二接入网设备为所述第一设备的辅基站,所述辅基站配置消息包括第一指示信息和/或第二指示信息,所述第一指示信息用于请求所述第一IP地址,所述第二指示信息用于请求所述第二IP地址;所述第一接入网设备接收所述第二接入网设备发送的辅基站配置响应消息,所述辅基站配置响应消息包括所述第一IP地址和/或所述第二IP地址。
- 根据权利要求4所述的方法,其特征在于,所述辅基站配置消息包括由所述主基站密钥推演得到的辅基站密钥,所述辅基站密钥用于对所述辅基站和所述第一设备之间的通信进行安全保护。
- 根据权利要求5所述的方法,其特征在于,所述方法还包括:所述第一接入网设备向所述第一设备发送所述第一IP地址。
- 根据权利要求3所述的方法,其特征在于,所述第一接入网设备获取第一密钥输入参数,包括:所述第一接入网设备接收所述第一设备发送的IP地址通知消息,所述IP地址通知消息包括所述第一IP地址;所述第一接入网设备向所述第二接入网设备发送辅基站配置消息,所述辅基站配置消息用于配置所述第二接入网设备为所述第一设备的辅基站,所述辅基站配置消息包括第二指示信息,所述第二指示信息用于请求所述第二IP地址;所述第一接入网设备接收所述第二接入网设备发送的辅基站配置响应消息,所述辅基站配置响应消息包括所述第二IP地址。
- 根据权利要求1至7任一项所述的方法,其特征在于,所述方法还包括:若所述第一接入网设备具备IAB宿主功能,则所述第一接入网设备选择第三接入网设备作为所述第一设备的辅基站;所述第一接入网设备获取第二密钥输入参数;所述第一接入网设备根据所述主基站密钥和所述第二密钥输入参数,生成第二IAB密钥K IAB2,所述K IAB2用于建立所述第一接入网设备与所述第一设备之间的安全隧道。
- 根据权利要求8所述的方法,其特征在于,所述第二密钥输入参数包括:第一IP地址和第三IP地址,所述第一IP地址为所述第一设备用于与IAB宿主通信的IP地址,所述第三IP地址为所述第一接入网设备用于与IAB节点通信的IP地址。
- 根据权利要求9所述的方法,其特征在于,所述第一接入网设备获取第二密钥输入参数,包括:所述第一接入网设备为所述第一设备分配所述第一IP地址;所述第一接入网设备从数据库中获取所述第三IP地址。
- 根据权利要求9所述的方法,其特征在于,所述第一接入网设备获取第二密钥输入参数,包括:所述第一接入网设备接收所述第一设备发送的IP地址通知消息,所述IP地址通知消息包括所述第一IP地址;所述第一接入网设备从数据库中获取所述第三IP地址。
- 一种密钥生成方法,其特征在于,所述方法包括:第二接入网设备接收第一接入网设备发送的辅基站配置消息,所述辅基站配置消息用于配置所述第二接入网设备作为第一设备的辅基站;当所述辅基站配置消息包括第三指示信息时,所述第二接入网设备确定自身是否具备IAB宿主功能,所述第三指示信息用于指示所述第一设备为IAB节点;当所述第二接入网设备具备IAB宿主功能时,所述第二接入网设备从所述第一接入网设备获取第一IAB密钥K IAB1,所述K IAB1用于建立所述第二接入网设备与所述第一设备之间的安全隧道,所述K IAB1是根据主基站密钥生成的,所述主基站密钥用于对所述第一接入网设备和所述第一设备之间的通信进行安全保护。
- 根据权利要求12所述的方法,其特征在于,所述K IAB1是根据主基站密钥生成的,包括:所述K IAB1是根据所述主基站密钥和所述第一密钥输入参数生成的,所述第一密钥输入参数包括第一IP地址和第二IP地址,所述第一IP地址为所述第一设备用于与IAB宿主通信的IP地址,所述第二IP地址为所述第二接入网设备用于与IAB节点通信的IP地址。
- 根据权利要求13所述的方法,其特征在于,所述辅基站配置消息还包括第一指示信息和/或第二指示信息,所述第一指示信息用于请求所述第一IP地址,所述第二指示信息用于请求所述第二IP地址。
- 根据权利要求14所述的方法,其特征在于,所述方法还包括:所述第二接入网设备向所述第一接入网设备发送辅基站配置响应消息,所述辅基站配置响应消息包括所述第一IP地址和/或所述第二IP地址。
- 根据权利要求15所述的方法,其特征在于,所述第二接入网设备从所述第一接入网设备获取K IAB1,包括:所述第二接入网设备接收所述第一接入网设备发送的辅基站重配置完成消息,所述辅基站重配置完成消息包括所述K IAB1。
- 根据权利要求14所述的方法,其特征在于,所述第二接入网设备从所述第一接入网设备获取K IAB1,包括:所述第二接入网设备向所述第一接入网设备发送密钥请求消息,所述密钥请求消息用于请求所述K IAB1;所述第二接入网设备接收所述第一接入网设备发送的密钥响应消息,所述密钥响应消息包括所述K IAB1。
- 根据权利要求17所述的方法,其特征在于,所述密钥请求消息还包括所述第一IP地址和/或第二IP地址。
- 一种密钥生成方法,其特征在于,所述方法包括:第一接入网设备确定通过所述第一接入网设备注册到网络的第一设备为IAB节点;在需要为所述第一设备选择辅基站的情况下,所述第一接入网设备判断自身是否具备IAB宿主功能;若所述第一接入网设备具备IAB宿主功能,则所述第一接入网设备选择第三接入网设备作为所述第一设备的辅基站;所述第一接入网设备根据辅基站密钥,生成第二IAB密钥K IAB2,所述K IAB2用于建立所述第一接入网设备与所述第一设备之间的安全隧道,所述辅基站密钥用于对所述辅基站和所述第一设备之间的通信进行安全保护。
- 根据权利要求19所述的方法,其特征在于,所述辅基站密钥是根据主基站密钥推演得到的,所述主基站密钥用于对所述第一接入网设备和所述第一设备之间的通信进行安全保护。
- 根据权利要求19或20所述的方法,其特征在于,在所述第一接入网设备根据辅基站密钥,生成K IAB2之后,所述方法还包括:所述第一接入网设备向所述第二接入网设备发送辅基站配置消息,所述辅基站配置消息包括所述辅基站密钥;所述第一接入网设备接收所述第二接入网设备发送的辅基站配置响应消息。
- 根据权利要求20或21所述的方法,其特征在于,所述第一接入网设备根据辅基站密钥,生成K IAB2,包括:所述第一接入网设备在发送辅基站配置消息之后,根据所述辅基站密钥,生成所述K IAB2。
- 根据权利要求20或21所述的方法,其特征在于,所述第一接入网设备根据辅基站密钥,生成K IAB2,包括:所述第一接入网设备在接收到辅基站配置响应消息之后,根据所述辅基站密钥,生成所述K IAB2。
- 根据权利要求19至23任一项所述的方法,其特征在于,所述方法还包括:若所述第一接入网设备不具备IAB宿主功能,则所述第一接入网设备选择具备IAB宿主功能的第二接入网设备作为所述第一设备的辅基站;所述第一接入网设备向所述第二接入网设备发送辅基站配置消息,所述辅基站配置消息包括所述辅基站密钥。
- 一种通信装置,其特征在于,所述通信装置包括用于执行权利要求1至24中任一项所涉及的方法中的各个步骤的模块。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储计算机指令,当所述计算机指令在计算机上运行时,使得所述计算机执行权利要求1至24任一项所述的方法。
- 一种计算机程序产品,其特征在于,所述计算机程序产品包括指令,当所述指令在计算机上运行时,使得计算机执行权利要求1至24任一项所述的方法。
- 一种芯片,其特征在于,所述芯片包括处理单元和收发管脚;所述处理单元用于执行权利要求1至24中任一项所涉及的方法中的处理操作,所述收发管脚用于执行权利要求1至24中任一项所涉及的方法中的通信操作。
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PCT/CN2020/127300 WO2022094976A1 (zh) | 2020-11-06 | 2020-11-06 | 密钥生成方法及装置 |
AU2020476322A AU2020476322B2 (en) | 2020-11-06 | Key generation method and apparatus | |
CN202080106763.8A CN116508356A (zh) | 2020-11-06 | 2020-11-06 | 密钥生成方法及装置 |
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