WO2011035667A1 - 实现网间漫游的方法、系统及查询和网络附着方法及系统 - Google Patents
实现网间漫游的方法、系统及查询和网络附着方法及系统 Download PDFInfo
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- WO2011035667A1 WO2011035667A1 PCT/CN2010/076204 CN2010076204W WO2011035667A1 WO 2011035667 A1 WO2011035667 A1 WO 2011035667A1 CN 2010076204 W CN2010076204 W CN 2010076204W WO 2011035667 A1 WO2011035667 A1 WO 2011035667A1
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- roaming
- network
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- 238000013507 mapping Methods 0.000 claims abstract description 153
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/12—Mobility data transfer between location registers or mobility servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
- H04W36/0038—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of security context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5084—Providing for device mobility
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
Definitions
- the present invention relates to a network in which identity identification and location identification are separated, and in particular, to a method, system, and query and network attachment method and system for implementing inter-network roaming.
- the IP address in the TCP/IP (Transmission Control Protocol/Internet Protocol) protocol widely used on the Internet has a dual function, which serves as the location identifier of the communication terminal host network interface of the network layer in the network topology, and also serves as the transport layer host. The identity of the network interface.
- the TCP/IP protocol was not designed at the beginning of the host.
- the semantic overload defects of such IP addresses are becoming increasingly apparent.
- the IP address of the host changes, not only the route changes, but also the identity of the communication terminal host changes. This causes the routing load to become heavier and heavy, and the change of the host ID will cause the application and connection to be interrupted.
- the purpose of separating the identity and location identifiers is to solve the problem of semantic overload and severe routing load and security of IP addresses, and to separate the dual functions of IP addresses to achieve dynamic redistribution of mobility, multiple townships, and IP addresses. Support for mitigating routing load and mutual visits between different network areas in the next generation Internet.
- the technical problem to be solved by the present invention is to provide a method, system, and query and network attachment method and system for implementing inter-network roaming, which solves the problem that a network that cannot be provided for roaming users can be provided in a network in which the identity identifier and the location identifier are separated, and the user is implemented. a network separated by different identity and location identifiers When moving between, you can enjoy the same network service.
- a method for implementing inter-network roaming is applied to a network in which an identity identifier and a location identifier are separated, in which an access identifier (AID) is used as a user identity of the terminal to route
- the identifier (RID) is used as the location identifier of the terminal, and the method includes: after the roaming terminal is attached to the access service node (ASN) of the roaming network, sending the first data packet to the destination device, where the destination address of the first data packet is the destination device AID;
- the ASN of the roaming network After receiving the first data packet, the ASN of the roaming network locally searches for the mapping information of the AID-RID in the ASN of the roaming network. If the RID of the destination device is not found, and the destination device does not belong to the roaming network, the ASN requests the roaming gateway. Query the RID of the destination device.
- the roaming gateway queries the home network of the destination device for the RID of the destination device and returns it to the ASN of the roaming network;
- the ASN of the roaming network sends the subsequent data packet of the roaming terminal to the destination device according to the RID of the destination device.
- the step of the ASN of the roaming network requesting the roaming gateway to query the RID of the destination device includes: sending, by the ASN of the roaming network, the AID of the destination device to the roaming gateway, requesting to query the RID of the destination device;
- the step of the roaming gateway querying the RID of the destination device from the home network of the destination device and returning to the ASN of the roaming network includes:
- the roaming gateway After receiving the AID of the destination device, the roaming gateway resolves the AID, learns the home network of the destination device, and sends the AID of the destination device to the mapping forwarding plane of the home network of the destination device, requesting to query the RID of the destination device.
- the mapping forwarding plane of the destination device's home network sends the mapping information of the AID-RID of the destination device to the roaming gateway after the corresponding RID is queried according to the AID of the destination device. After the roaming gateway saves, it is forwarded to the ASN of the roaming network.
- the ASN to which the roaming terminal is attached to the roaming network includes:
- the roaming terminal requests attachment to the ASN of the roaming network, and sends the AID of the roaming terminal to the ASN of the roaming network;
- the ASN of the roaming network identifies that the roaming terminal does not belong to the local network according to the AID of the roaming terminal.
- Network request access to the roaming gateway;
- the roaming gateway searches for the home network of the roaming terminal according to the AID of the roaming terminal, and requests authentication from the authentication center of the roaming terminal belonging to the network;
- the authentication center After the authentication center authenticates the roaming terminal, the authentication result is notified to the roaming gateway; and the roaming gateway notifies the ASN of the roaming network of the access result, and the ASN of the roaming network notifies the roaming terminal with the attached result.
- the step of the ASN of the roaming network sending the subsequent data packet of the roaming terminal to the destination device according to the RID of the destination device includes:
- the ASN in the roaming network repackages the data packet of the roaming terminal, and uses the RID of the destination device and the RID of the roaming terminal as the destination address and source address of the repackaged data packet respectively, and passes through the media plane channel with the destination ASN.
- the re-encapsulated data packet is sent to the destination ASN; and the destination ASN decapsulates the ASN re-encapsulated data packet in the received roaming network, and restores the data packet of the roaming terminal to the destination device.
- the step of the ASN of the roaming network sending the subsequent data packet of the roaming terminal to the destination device according to the RID of the destination device includes:
- the ASN in the roaming network re-encapsulates the data packet of the roaming terminal, and uses the RID of the destination device and the RID of the roaming terminal as the destination address and the source address of the re-encapsulated data packet respectively, and sends the re-encapsulated data packet to the roaming.
- the roaming gateway sends the repackaged data packet to the destination ASN according to the RID of the destination device;
- the ASN decapsulates the ASN repackaged data packet in the received roaming network, and restores the data packet of the roaming terminal to the destination device.
- the method also includes:
- the ASN of the roaming network sends the first data packet to the roaming gateway when requesting the roaming gateway to query the RID of the destination device;
- the roaming gateway queries the RID of the destination device from the home network of the destination device
- the first data packet is also sent to the home network of the destination device; After the home network of the destination device queries the RID of the destination device, the first data packet is sent to the destination ASN according to the queried RID.
- the ASN of the roaming network sends the AID of the destination device to the roaming gateway, and the step of requesting to query the RID of the destination device includes: sending, by the ASN of the roaming network, an AID-RID query message to the roaming gateway, where the AID-RID is The query message carries the AID of the destination device, and requests to query the RID of the destination device.
- the roaming gateway sends the AID of the destination device to the mapping forwarding plane of the home network of the destination device, and the step of requesting to query the RID of the destination device includes: sending, by the roaming gateway, an AID-RID request to the mapping forwarding plane of the home network of the destination device
- the message carries the AID of the destination device in the AID-RID request message, and requests to query the RID of the destination device;
- the mapping forwarding plane of the destination device home network transmitting the mapping information of the AID-RID of the destination device to the roaming gateway includes: the mapping forwarding plane of the destination device home network returns an AID-RID request result message to the roaming gateway, and the destination The mapping information of the AID and the RID of the device is sent to the roaming gateway;
- the roaming gateway forwards mapping information of the AID-RID of the destination device to the roaming network
- the steps of the ASN include:
- the roaming gateway sends the mapping information of the AID and the RID of the destination device to the ASN of the roaming network by sending an AID-RID query result message to the ASN of the roaming network.
- the roaming terminal requests attachment to the ASN of the roaming network
- the step of transmitting the AID of the roaming terminal to the ASN of the roaming network includes: the roaming terminal requests attachment to the ASN of the roaming network by sending an attach request message, where The AID of the roaming terminal is carried in the attach request message;
- the step of requesting the access by the ASN of the roaming network to the roaming gateway includes: the ASN of the roaming network requesting access to the roaming gateway by sending an access request message;
- the step of the roaming gateway requesting the authentication from the authentication center of the home network of the roaming terminal includes: the roaming gateway requests the authentication center of the home network of the roaming terminal to request the authentication by sending the authentication request message; the step of the authentication center notifying the roaming gateway of the authentication result includes: : The authentication center notifies the roaming gateway of the authentication result by sending an authentication result message;
- the step of the roaming gateway notifying the ASN of the roaming network to the access result includes: the roaming gateway notifying the ASN of the roaming network by sending an access response message;
- the step of the ASN of the roaming network notifying the roaming terminal of the attaching result includes: the ASN of the roaming network notifying the roaming terminal of the attaching result by sending an attach response message.
- the configuration information of the AID range of the local network is stored on the ASN of the roaming network, and the ASN of the roaming network distinguishes the terminal and the roaming terminal of the local network according to the configuration information of the AID range of the local network;
- the configuration information of each network AID range that is connected to the roaming gateway, and the roaming gateway distinguishes the terminals of different networks according to the configuration information of the network AID range.
- the present invention also provides a system for implementing inter-network roaming, which is applied to a network in which an identity identifier and a location identifier are separated, in which AID is used as a user identity of the terminal, and RID is used as a location identifier of the terminal, the system Including: roaming terminal, destination device, ASN of roaming network and roaming gateway, where:
- the roaming terminal is configured to: after attaching to the ASN of the roaming network, send a first data packet to the destination device, where the destination address of the first data packet is an AID of the destination device;
- the ASN of the roaming network is set to: after receiving the first data packet, locally query the mapping information of the AID-RID, if the RID of the destination device is not found, and the destination device does not belong to the roaming network, then the roaming gateway is Requesting to query the RID of the destination device; and after receiving the RID of the destination device returned by the roaming gateway, sending a subsequent data packet of the roaming terminal to the destination device according to the RID;
- the roaming gateway is configured to: query the RID of the destination device from the home network of the destination device, and return the ASN to the roaming network.
- the ASN of the roaming network is configured to request the roaming gateway to query the RID of the destination device in the following manner: sending the AID of the destination device to the roaming gateway, requesting to query the RID of the destination device; the roaming gateway is set to:
- the AID After receiving the AID of the destination device, the AID is parsed, the home network of the destination device is obtained, and the AID of the destination device is sent to the mapping forwarding plane of the home network of the destination device, and the RID of the destination device is requested to be queried;
- the mapping forwarding plane that receives and stores the home network of the destination device queries the mapping information of the AID-RID of the destination device according to the AID of the destination device, and forwards the mapping information to the ASN of the roaming network.
- the roaming terminal is further configured to: request an attach to the ASN of the roaming network, and connect the roaming terminal The AID sent to the ASN of the roaming network;
- the ASN of the roaming network is further configured to: identify, according to the AID of the roaming terminal, that the roaming terminal does not belong to the local network, request the access from the roaming gateway; and receive the access result sent by the roaming gateway, and notify the roaming result of the attaching result Terminal
- the roaming gateway is further configured to: look up the home network of the roaming terminal according to the AID of the roaming terminal, request authentication from the authentication center of the home network of the roaming terminal; and receive the authentication result sent by the authentication center, and notify the roaming place of the access result The ASN of the network.
- the ASN of the roaming network is configured to send subsequent data packets of the roaming terminal to the destination device according to the RID of the destination device in the following manner:
- the RID is used as the destination address and the source address of the repackaged data packet, and the re-encapsulated data packet is sent to the destination ASN through the media plane channel between the RSN and the destination ASN;
- the ASN decapsulates the ASN repackaged data packet in the received roaming network, and restores the data packet of the roaming terminal to the destination device.
- the ASN of the roaming network is configured to send subsequent data packets of the roaming terminal to the destination device according to the RID of the destination device in the following manner:
- Repacking the data packet of the roaming terminal using the RID of the destination device and the RID of the roaming terminal as the destination address and the source address of the repackaged data packet, respectively, and sending the repackaged data packet to the roaming gateway;
- the roaming gateway sends the re-encapsulated data packet to the destination ASN according to the RID of the destination device.
- the destination ASN decapsulates the ASN re-encapsulated data packet in the received roaming network, and restores the data packet of the roaming terminal, and sends the data packet. Give the destination device.
- the ASN of the roaming network is further configured to: when requesting the roaming gateway to query the RID of the destination device, send the first data packet to the roaming gateway;
- the roaming gateway is further configured to: when the RID of the destination device is queried from the home network of the destination device, send the first data packet to the home network of the destination device;
- the home network of the destination device is further configured to: after querying the RID of the destination device, send the first data packet to the destination ASN according to the queried RID.
- the ASN of the roaming network is configured to send an AID-RID query message to the roaming gateway, and the AID-RID query message carries the AID of the destination device, and requests to query the RID of the destination device;
- the roaming gateway is set to:
- the AID-RID request message carries the AID of the destination device, and requests to query the RID of the destination device.
- mapping information of the AID and the RID of the destination device is sent to the ASN of the roaming network by sending an AID-RID query result message to the ASN of the roaming network.
- the roaming terminal is configured to request attachment to the ASN of the roaming network in the following manner, and send the AID of the roaming terminal to the ASN of the roaming network: requesting attachment to the ASN of the roaming network by sending an attach request message, where The attach request message carries the AID of the roaming terminal;
- the ASN of the roaming network is configured to: request an access to the roaming gateway by sending an access request message; and notify the roaming terminal of the result of the attach by sending an attach response message
- the roaming gateway is configured to: request an authentication from the authentication center of the home network of the roaming terminal by sending an authentication request message; receive an authentication result message sent by the authentication center; and notify the roaming network of the access result by sending an access response message ASN.
- the configuration information of the AID range of the local network is stored on the ASN of the roaming network, and the ASN of the roaming network is further configured to distinguish the terminal and the roaming terminal of the local network according to the configuration information of the AID range of the local network;
- the configuration information of each network AID range connected to the roaming gateway is saved on the roaming gateway, and the roaming gateway is further configured to distinguish the terminals of different networks according to the configuration information of the network AID range.
- the present invention also provides a method for implementing inter-network roaming.
- the method is applied to a network in which identity identification and location identification are separated.
- the AID is used as the user identity of the terminal
- the RID is used as the location identifier of the terminal.
- the method includes :
- the first data packet is sent to the destination device, the first The destination address of the data packet is the AID of the destination device;
- the ASN of the roaming network After receiving the first data packet, the ASN of the roaming network locally searches for the mapping information of the AID-RID in the ASN of the roaming network. If the RID of the destination device is not found, and the destination device belongs to the roaming network, the local request is requested. Mapping the forwarding plane to query the RID of the destination device;
- the local mapping forwarding plane queries the RID of the destination device and returns it to the ASN of the roaming network;
- the ASN of the roaming network sends the subsequent data packet of the roaming terminal to the destination device according to the RID of the destination device.
- the method also includes:
- the ASN of the roaming network requests to query the destination device from the local mapping forwarding plane.
- the local mapping forwarding plane queries the RID of the destination device
- the local data packet is sent to the destination ASN according to the RID of the query.
- the present invention also provides a system for implementing inter-network roaming, which is applied to a network in which an identity identifier and a location identifier are separated, in which AID is used as a user identity of the terminal, and RID is used as a location identifier of the terminal, the system Including: a roaming terminal, a destination device, an ASN of a roaming network, and a local mapping forwarding plane, where:
- the roaming terminal is configured to: after attaching to the ASN of the roaming network, send a first data packet to the destination device, where the destination address of the first data packet is an AID of the destination device;
- the ASN of the roaming network is set to: after receiving the first data packet, in the roaming network
- the ASN locally searches for the mapping information of the AID-RID. If the RID of the destination device is not found, and the destination device belongs to the roaming network, the local mapping forwarding plane is requested to query the RID of the destination device; and the local mapping forwarding plane is received. After the RID of the destination device, according to the RID, the subsequent data packet of the roaming terminal is sent to the destination device;
- the local mapping forwarding plane is set to: Query the RID of the destination device and return it to the ASN of the roaming network.
- the ASN of the roaming network is further configured to send the first data packet to the mapping forwarding plane when requesting the local mapping forwarding plane to query the RID of the destination device;
- the local mapping forwarding plane is further configured to: after querying the RID of the destination device, send the first data packet to the destination ASN according to the queried RID.
- the present invention further provides a query method, which is characterized in that the method is applied to a network in which an identity identifier and a location identifier are separated, in which AID is used as a user identity of the terminal, and RID is used as a location identifier of the terminal, the method Includes:
- the ASN sends the AID of the device to the roaming gateway, and requests to query the RID of the device.
- the roaming gateway After receiving the AID of the device, the roaming gateway parses the AID, learns the home network of the device, and sends the AID of the device to the mapping forwarding plane of the home network of the device, requesting to query the RID of the device;
- the mapping forwarding plane of the device home network sends the mapping information of the device's AID-RID to the roaming gateway after the device searches for the corresponding RID.
- the roaming gateway saves the information and forwards it to the ASN.
- the ASN sends the AID of the device to the roaming gateway.
- the step of requesting to query the RID of the device includes: sending, by the ASN, an AID-RID query message to the roaming gateway, and carrying the AID of the device in the AID-RID query message, requesting the query. RID of the device;
- the roaming gateway sends the AID of the device to the mapping forwarding plane of the home network of the device, and the step of requesting to query the RID of the device includes: sending, by the roaming gateway, an AID-RID request message to the mapping forwarding plane of the home network of the device, where The AID-RID request message carries the AID of the device, and requests to query the RID of the device;
- the step of the mapping forwarding plane of the device home network transmitting the mapping information of the AID-RID of the device to the roaming gateway includes: the mapping forwarding plane of the home network of the device returns the AID-RID request result message to the roaming gateway, and the AID of the device is The mapping information of the RID is sent to the roaming gateway; the step of the roaming gateway forwarding the mapping information of the AID-RID of the device to the ASN includes: the mapping information of the AID and the RID of the device by the roaming gateway sending the AID-RID query result message to the ASN Send to ASN.
- the invention also provides an inquiry system, which is applied to a network in which identity identification and location identification are separated.
- the AID is used as the user identity of the terminal
- the RID is used as the location identifier of the terminal, including: ASN, roaming gateway And a mapping forwarding plane of the device home network;
- the ASN is configured to: send the AID of the device to the roaming gateway, and request to query the RID of the device;
- the roaming gateway is configured to: after receiving the AID of the device, parse the AID, learn the home network of the device, and send the AID of the device to the mapping forwarding plane of the home network of the device, requesting to query the RID of the device; After the mapping information of the AID-RID returned by the mapping forwarding plane of the device home network is saved and forwarded to the ASN;
- the mapping forwarding plane of the device home network is set to: after the corresponding RID is queried according to the AID of the device, the mapping information of the AID-RID of the device is sent to the roaming gateway.
- the ASN is configured to: send an AID-RID query message to the roaming gateway, and carry the AID of the device in the AID-RID query message, requesting to query the RID of the device;
- the roaming gateway is configured to: send an AID-RID request message to the mapping forwarding plane of the home network of the device, carry the AID of the device in the AID-RID request message, request to query the RID of the device, and send the AID by sending the ASN to the ASN.
- the RID query result message sends the mapping information of the device's AID and RID to the ASN.
- the mapping forwarding plane of the device home network is set to: send the mapping information of the AID and the RID of the device to the roaming gateway by returning the AID-RID request result message to the roaming gateway.
- the present invention also provides a network attachment method, which is applied to a network in which an identity identifier and a location identifier are separated.
- the AID is used as the user identity of the terminal
- the RID is used as the location identifier of the terminal.
- the method includes:
- the roaming terminal requests attachment to the ASN of the roaming network, and sends the AID of the roaming terminal to the ASN of the roaming network;
- the ASN of the roaming network identifies that the roaming terminal does not belong to the local network according to the AID of the roaming terminal, and requests access to the roaming gateway;
- the roaming gateway searches for the home network of the roaming terminal according to the AID of the roaming terminal, and requests authentication from the authentication center of the roaming terminal belonging to the network;
- the authentication center After the authentication center authenticates the roaming terminal, the authentication result is notified to the roaming gateway; and the roaming gateway notifies the ASN of the roaming network of the access result, and the ASN of the roaming network notifies the roaming terminal with the attached result.
- the roaming terminal requests attachment to the ASN of the roaming network
- the step of transmitting the AID of the roaming terminal to the ASN of the roaming network includes: the roaming terminal sends an attach request message to The ASN of the roaming network requests attachment, and the AID of the roaming terminal is carried in the attach request message;
- the step of requesting access by the ASN of the roaming network to the roaming gateway includes: sending an access request by the ASN of the roaming network Message, requesting access to the roaming gateway;
- the step of the roaming gateway requesting the authentication from the authentication center of the home network of the roaming terminal includes: the roaming gateway requests the authentication center of the home network of the roaming terminal to request the authentication by sending the authentication request message; the step of the authentication center notifying the roaming gateway of the authentication result includes: : The authentication center notifies the roaming gateway of the authentication result by sending an authentication result message;
- the step of the roaming gateway notifying the ASN of the roaming network to the access result includes: the roaming gateway notifying the ASN of the roaming network by sending an access response message;
- the step of the ASN of the roaming network notifying the roaming terminal of the attaching result comprises: the ASN of the roaming network notifying the roaming terminal of the attaching result by sending an attach response message.
- the present invention also provides a network attachment system, which is applied to a network in which identity identification and location identification are separated.
- the AID is used as the user identity of the terminal
- the RID is used as the location identifier of the terminal.
- the system includes: roaming The terminal, the ASN of the roaming network, the roaming gateway, and the authentication center of the home network of the roaming terminal;
- the roaming terminal is configured to: request an attach to the ASN of the roaming network, and send the AID of the roaming terminal to the ASN of the roaming network;
- the ASN of the roaming network is set to: according to the AID of the roaming terminal, the roaming terminal does not belong to the local network, and requests the access to the roaming gateway; and after receiving the access result returned by the roaming gateway, notifying the roaming terminal of the attaching result;
- the roaming gateway is configured to: search for a home network of the roaming terminal according to the AID of the roaming terminal, request authentication from the authentication center of the home network of the roaming terminal; and notify the roaming area after receiving the authentication result returned by the authentication center of the home network of the roaming terminal ASN access result of the network;
- the authentication center of the home network of the roaming terminal is configured to: after authenticating the roaming terminal, notify the roaming gateway of the authentication result.
- the roaming terminal is configured to: attach an ASN request to the roaming network by sending an attach request message, and carry the AID of the roaming terminal in the attach request message;
- the ASN of the roaming network is set to: requesting from the roaming gateway by sending an access request message Access; and notify the roaming terminal of the result of the attachment by sending an attach response message
- the roaming gateway is configured to: request an authentication from the authentication center of the home network of the roaming terminal by sending an authentication request message; and notify the ASN of the roaming network by sending an access response message;
- the authentication center is configured to: notify the roaming gateway of the authentication result by sending an authentication result message.
- the network is simple, and the roaming gateway is interconnected with each network. In the view of a certain network, the roaming gateway is part of the network, and the roaming service is accessed from the roaming gateway to the home network.
- a network does not need to establish a complex network structure with other roaming partners, simplifying the network structure.
- the roaming gateway has network isolation function, which can block the network structure of other roaming partners from the network.
- the network only needs to perform communication-related data configuration with the roaming gateway, and does not need to understand the network structure of the roaming partner.
- the roaming gateway has the function of inter-network settlement and statistics. It can count the traffic between each roaming partner, facilitate billing and settlement, formulate business development plans, and optimize operations.
- Figure 1 is an architectural diagram of a network separated from an identity identifier and a location identifier
- FIG. 2 is an architectural diagram of another network in which identity and location are separated
- 3 is an architectural diagram of a network in which a third identity is separated from a location identity
- FIG. 5 is a flowchart of a method for implementing inter-network roaming according to the present invention.
- Figure 1 shows the architecture of a network based on an IP network router to implement identity and location identification separation.
- the logical functions of each network element are as follows:
- An access service node is responsible for providing access services for various mobile terminals, assigning a route identifier (RID) to the accessed terminal, and encapsulating the data packet of the terminal and transmitting it to the core network for transmission, and is responsible for Query the location of the communication peer. If the ASN does not store the routing location information of the communication peer locally, it searches through the mapping forwarding plane.
- RID route identifier
- the mapping forwarding plane is composed of multiple identity location registers/packet forwarding functions (ILR/PTF), which is responsible for maintaining the mapping information of the identity and routing identifiers of the terminals in the network, and providing query services to the ASN and other ILRs.
- ILR/PTF identity location registers/packet forwarding functions
- the certification center is responsible for recording information such as terminal categories and service levels. When the terminal accesses, it authenticates and authorizes the terminal.
- the certificate authority supports two-way authentication between the network and the terminal.
- the IP backbone network is an interconnection network between ASNs.
- the main function is to select and forward data packets according to the routing identifiers in the data packets, and forward the data sent by the ASN to the correct destination.
- the IP network is controlled by the core switching router. (CSR) composition.
- CSR core switching router
- the Interworking Gateway (ISN) is an interworking node between the identity and location identification separation network and other networks. Two different types of networks must communicate through the ISN.
- the radio access network is responsible for providing and maintaining the Layer 2 link between the terminal and the ASN. In the cellular mobile network, it is responsible for radio resource allocation and management.
- the wireless network may be WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), CDMA2000 (Code Division Multiple Access 2000), LTE (Long Term Evolution) and other wireless networks.
- FIG. 2 shows another architecture of a network that implements separation of identity and location identifiers.
- the architecture divides the network into an access network and a backbone network.
- the access network is located at the edge of the backbone network and is responsible for accessing all terminals.
- the backbone network is responsible for routing and forwarding data packets between terminals accessed through the access network. There is no overlap between the access network and the backbone network in the topology relationship.
- the RID is the location identifier assigned to the terminal. , used in the backbone network.
- the terminal accessing the network may be one or more of a mobile terminal, a fixed terminal, and a nomadic terminal, such as a mobile phone, a fixed telephone, a computer, an application server, and the like.
- the access network is used to provide the terminal with a layer 2 (physical layer and link layer) access means, and maintains a physical access link between the terminal and the ASN.
- Possible Layer 2 access methods include: cellular mobile network technology (GSM/CDMA/TD-SCDMA/WCDMA/WiMAX/LTE), DSL, broadband fiber access or WiFi access, and more.
- the backbone network of the architecture is divided into two planes: a generalized forwarding plane and a mapping forwarding plane, and an access service node (ASN: Access Service Node) and a certification center.
- ASN Access Service Node
- the ASN is a demarcation node of a generalized forwarding plane, a mapping forwarding plane, and an access network, and has an interface with an access network, a generalized forwarding plane, and a mapping forwarding plane. It is used to provide access services for the terminal, maintain the connection between the terminal and the network, assign the RID to the terminal, register and register the RID of the terminal to the mapping forwarding plane, maintain the mapping information of the AID-RID, and implement the routing of the data. Forward.
- the generalized forwarding plane is mainly used for routing and forwarding data packets with the RID as the destination address according to the RID in the data packet, and the data routing and forwarding behavior in the generalized forwarding plane is consistent with the traditional IP network.
- the main network elements of the generalized forwarding plane include a common router (CR: Common Router) and an interconnected service node (ISN: Interconnect Service Node).
- the mapping forwarding plane is mainly used to store the identity location mapping information of the terminal (ie, the mapping information of the AID-RID), process the registration and query of the terminal location, and route and forward the data packet with the AID as the destination address.
- the primary network element of the mapping forwarding plane includes the Identity Location Register/Packet Transfer Function (ILR/PTF: Identity Location Register/Packet Transfer Function).
- the authentication center is used to record the attribute information of the network terminal user of the architecture, such as the user category, the authentication information, and the user service level, and completes the access authentication and authorization for the terminal, and may also have a charging function.
- the certificate authority supports two-way authentication between the terminal and the network, and generates user security information for authentication, integrity protection, and encryption.
- the ASN is independent of the backbone network in the division of the architecture, and is located in the backbone network and connected.
- the demarcation node of the network has an interface with the access network and the backbone network, as shown in FIG. The function actually completed is the same as that of FIG. 2.
- the present invention establishes a roaming gateway between the networks, and each network establishes a network interconnection relationship with the roaming gateway, including the communication between the control plane channel (signaling channel) and the media plane channel (the media plane channel refers to the ASN).
- the roaming gateway in the view of each network, is an integral part of its network and can communicate with the authentication center, pass authentication information, and forward data.
- the roaming gateway needs to communicate with the mapping forwarding plane of each network because the mapping forwarding plane exists.
- the ASN of the roaming user visited network can query the AID of the roaming user from the home network through the roaming gateway. -RID mapping information.
- a network can be interconnected with one or more roaming gateways, that is, a roaming-capable network has at least one ILR/PTF in communication with the roaming gateway, and the roaming gateway roams the ASN to the user through the ILR/PTF with which it communicates Provides the query function of the mapping information of the AID-RID and the first packet forwarding function.
- the network status of the roaming gateway and ASN is the same, but there are some differences in functionality.
- the ASN of the network must have the AID identification capability to distinguish the AIDs of the terminals and servers of the home network and the roaming network.
- the roaming gateway must also have the AID identification capability, which can separate the terminals of different networks and the AID of the server.
- the data packets between the ASNs are standard IP packets, which can be routed on the IP backbone network.
- FIG. 5 is a schematic diagram of a method for implementing inter-network roaming according to the present invention.
- a roaming user accesses an application server (APP Server) at a home location through an ASN-A access in a roaming network A, where the application server is located at a home of a roaming user.
- the certification center and ILR devices are deployed at the home.
- the process of accessing the application server at the home location including:
- the user's terminal initiates an attach request, and sends an attach request message (Attach Req) to the ASN (ASN-A) of the roaming place, and carries the AID of the user in the attach request message;
- ASN-A resolves the AID of the user, and finds that the user is a roaming user, and sends an Access Req message to the roaming gateway to request access;
- the configuration information of the AID range of the local network can be saved on the ASN to distinguish users and roaming users of the network.
- the roaming gateway parses the AID of the user, learns and searches for the home network of the user (network B), and sends an authentication request (Auth Req) message to the authentication center of the network B (pre-configured);
- Auth Req authentication request
- the configuration information of the network AID range, the roaming gateway distinguishes the terminals of different networks according to the configuration information, and searches for the corresponding network.
- the authentication center that receives the Auth Req authenticates the user, and returns an authentication result (Auth Res) message to the roaming gateway, and notifies the roaming gateway of the authentication result;
- the roaming gateway After receiving the Auth Res message, the roaming gateway returns an access response message (Access Res) to the ASN-A, and notifies the ASN-A of the access result;
- the ASN-A After receiving the access response message, the ASN-A returns an attach response message (Attach Res) to the terminal, and notifies the roaming terminal of the result of the attaching;
- the source terminal In the case of successful access, the source terminal initiates a service request, and sends a first data packet (Service First Data). Assume that the source terminal accesses the application server of the home location, and the AID is AID-B, and the source address of the first data packet is The AID of the source terminal, the destination address is AID-B;
- the ASN-A After receiving the data packet sent by the source terminal, the ASN-A queries the RID corresponding to the AID-B locally. If the corresponding RID is not found, the AID-B is parsed to determine whether the destination device belongs to the roaming network. If yes, the AID-RID query message (AID-RID Query) is sent to the roaming gateway, the AID-B is carried in the AID-RID Query, and the first data packet is sent to the roaming gateway;
- ASN-A queries from the local mapping forwarding plane.
- the RID corresponding to the AID-B, and the first data packet is sent to the local mapping forwarding plane.
- the local mapping forwarding plane queries the RID corresponding to the AID-B
- the first data packet is sent to the destination ASN according to the RID
- the mapping information of the AID-RID of the destination device is sent to the ASN-A
- the ASN-A sends the subsequent data packet of the roaming terminal to the destination ASN according to the mapping information of the AID-RID of the destination device.
- the roaming gateway After receiving the AID-RID Query, the roaming gateway parses the AID of the destination device, learns the network to which the destination device belongs (network B), and sends an AID-RID Req (request) message to the mapping forwarding plane of network B, in the AID-RID. Req carries AID-B, and forwards the received first data packet to the mapping forwarding plane of network B;
- the mapping forwarding plane of the network B returns an AID-RID request result (AID-RID Res) message to the roaming gateway according to the AID-B query corresponding RID, and sends the mapping information of the AID-B and the RID to the roaming gateway, the roaming gateway Saving mapping information of AID-B and RID;
- the roaming gateway returns an AID-RID Query Res message to the ASN-A, and sends the mapping information of the AID-B and the RID to the ASN-A.
- the ASN-A locally stores the mapping information of the AID-B and the RID.
- the mapping forwarding plane sends the first data packet of the source terminal to the ASN-B according to the RID corresponding to the AID-B, and the ASN-B forwards the first data packet to the application server accessed by the source terminal.
- the ASN-A has The RID corresponding to the AID-B is obtained, and the subsequent data packet transmission process has two possible situations according to the networking of the network, as described in steps 513 and 514, respectively.
- the ASN-A in the roaming network can directly communicate with the media plane channel of the ASN-B in the home network (the ASN-A does not directly communicate with the authentication center and the mapping plane of the network B), the ASN-A pair roaming terminal
- the media plane data packet is repackaged, and the RID of the destination device and the RID of the roaming terminal are respectively used as the destination address and source address of the repackaged data packet, and are sent to ASN-B, ASN-B to receive the ASN-A.
- the repackaged data packet is decapsulated, and the data packet is restored to a media plane data packet of the roaming terminal, and sent to the application server;
- the media plane data does not need to go through the roaming gateway.
- the ASN-A in the roaming network cannot directly communicate with the media plane of the ASN-B in the home network (the ASN-A does not directly communicate with the authentication center and the mapping plane of the network B), the ASN-A media to the terminal
- the packet is repackaged, and the RID of the destination device and the RID of the roaming terminal are respectively used as the destination address and source address of the repackaged data packet, and sent to the roaming gateway, and the roaming gateway sends the repackaged data packet to the ASN- B.
- the ASN-B decapsulates the received ASN-A repackaged data packet, restores the media plane data packet of the roaming terminal, and sends the media plane data packet of the roaming terminal to the application server.
- the roaming gateway needs to find the mapping information of the destination AID and RID of the data packet so that the data packet can be
- the ASN is sent to the correct ASN, and the ASN is sent to the corresponding destination terminal or application server.
- the roaming gateway does not modify the encapsulation format and content of the data packets sent by the ASN. It only analyzes and counts the data. After the AID-RID mapping relationship is searched for each received packet, it is sent to the correct ASN.
- the present invention also provides a system for implementing inter-network roaming, which is applied to a network in which identity identification and location identification are separated.
- the system includes: a roaming terminal, a destination device, an ASN of a roaming network, and a roaming gateway, where:
- a roaming terminal configured to send a first data packet to the destination device after the ASN attached to the roaming network, where the destination address of the first data packet is an AID of the destination device;
- the ASN of the roaming network is used to query the mapping information of the AID-RID locally after receiving the first data packet. If the RID of the destination device is not found, and the destination device does not belong to the roaming network, request the query from the roaming gateway. The RID of the destination device, and after receiving the RID of the destination device returned by the roaming gateway, sending a subsequent data packet of the roaming terminal to the destination device according to the RID;
- the ASN of the roaming network requests the roaming gateway to query the RID of the destination device, and the process of the roaming gateway querying the RID of the destination device includes:
- the ASN of the roaming network sends the AID of the destination device to the roaming gateway, requesting to query the RID of the destination device;
- the roaming gateway After receiving the AID of the destination device, the roaming gateway resolves the AID, learns the home network of the destination device, and sends the AID of the destination device to the mapping forwarding plane of the home network of the destination device, requesting to query the RID of the destination device.
- the mapping forwarding plane of the destination device's home network sends the mapping information of the AID-RID of the destination device to the roaming gateway after the corresponding RID is queried according to the AID of the destination device. After the roaming gateway saves, it is forwarded to the ASN of the roaming network.
- the roaming gateway is configured to query the RID of the destination device from the home network of the destination device, and return the ASN to the roaming network.
- the process of attaching a roaming terminal to an ASN of a roaming network includes:
- the roaming terminal requests attachment to the ASN of the roaming network, and sends the AID of the roaming terminal to the ASN of the roaming network;
- the ASN of the roaming network identifies that the roaming terminal does not belong to the local network according to the AID of the roaming terminal, and requests access to the roaming gateway;
- the roaming gateway searches for the home network of the roaming terminal according to the AID of the roaming terminal, and requests authentication from the authentication center of the roaming terminal belonging to the network;
- the authentication center After authenticating the roaming terminal, the authentication center notifies the roaming gateway of the authentication result;
- the roaming gateway notifies the ASN of the roaming network of the access result, and the ASN of the roaming network notifies the roaming terminal of the attached result.
- the process of the ASN of the roaming network sending the subsequent data packet of the roaming terminal to the destination device according to the RID of the destination device includes:
- the ASN in the roaming network repackages the data packets of the roaming terminal, and uses the destination device.
- the RID and the RID of the roaming terminal are respectively used as the destination address and the source address of the repackaged data packet, and the repackaged data packet is sent to the destination ASN through the media plane channel between the RID and the destination ASN;
- the ASN decapsulates the ASN re-encapsulated data packet in the received roaming network, and restores the data packet of the roaming terminal to the destination device;
- the ASN in the roaming network repackages the data packets of the roaming terminal, and uses the destination device.
- the RID and the RID of the roaming terminal are respectively used as the destination address and the source address of the repackaged data packet, and the repackaged data packet is sent to the roaming gateway;
- the roaming gateway sends the re-encapsulated data packet to the destination ASN according to the RID of the destination device.
- the destination ASN decapsulates the ASN re-encapsulated data packet in the received roaming network, and restores the data packet of the roaming terminal, and sends the data packet. Give the destination device.
- the ASN of the roaming network is further configured to send the first data packet to the roaming gateway when requesting the roaming gateway to query the RID of the destination device;
- the roaming gateway is further configured to: when the RID of the destination device is queried from the home network of the destination device, send the first data packet to the home network of the destination device;
- the home network of the destination device is further configured to send the first data packet to the destination ASN according to the queried RID after the RID of the destination device is queried.
- the ASN of the roaming network sends an AID-RID query message to the roaming gateway, and the AID-RID query message carries the AID of the destination device, and requests to query the RID of the destination device.
- the roaming gateway sends an AID-RID request message to the mapping forwarding plane of the destination device home network, and the AID-RID request message carries the AID of the destination device, and requests to query the RID of the destination device.
- the mapping forwarding plane of the destination device home network sends the AID-RID request result message to the roaming gateway, and sends the mapping information of the AID and the RID of the destination device to the roaming gateway;
- the roaming gateway sends the mapping information of the AID and the RID of the destination device to the ASN of the roaming network by sending an AID-RID query result message to the ASN of the roaming network.
- the roaming terminal requests the attachment to the ASN of the roaming network by sending an attach request message, and carries the AID of the roaming terminal in the attach request message;
- the ASN of the roaming network requests access to the roaming gateway by sending an access request message;
- the roaming gateway requests the authentication center of the home network of the roaming terminal to request authentication by sending an authentication request message;
- the authentication center notifies the roaming gateway of the authentication result by sending an authentication result message
- the roaming gateway notifies the ASN of the roaming network by sending an access response message; the ASN of the roaming network notifies the roaming terminal of the result of the attach by sending an attach response message.
- the configuration information of the AID range of the local network is stored on the ASN of the roaming network, and the ASN of the roaming network distinguishes the terminal and the roaming terminal of the network according to the configuration information of the AID range of the local network;
- the configuration information of each network AID range connected to the roaming gateway is stored on the roaming gateway, and the roaming gateway distinguishes the terminals of different networks according to the configuration information of each network AID range.
- the network is simple, and the roaming gateway is interconnected with each network. In the view of a certain network, the roaming gateway is part of the network, and the roaming service is accessed from the roaming gateway to the home network.
- a network does not need to establish a complex network structure with other roaming partners, simplifying the network structure.
- the roaming gateway has network isolation function, which can block the network structure of other roaming partners from the network.
- the network only needs to perform communication-related data configuration with the roaming gateway, and does not need to understand the network structure of the roaming partner.
- the roaming gateway has the function of inter-network settlement and statistics. It can count the traffic between each roaming partner, facilitate billing and settlement, formulate business development plans, and optimize operations.
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- 2010-08-20 JP JP2012530113A patent/JP5427952B2/ja not_active Expired - Fee Related
- 2010-08-20 KR KR1020127010651A patent/KR101354869B1/ko active IP Right Grant
- 2010-08-20 WO PCT/CN2010/076204 patent/WO2011035667A1/zh active Application Filing
- 2010-08-20 EP EP10818361.7A patent/EP2469962A4/en not_active Ceased
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CN103051541B (zh) * | 2011-10-14 | 2017-04-05 | 中兴通讯股份有限公司 | 一种标识网内的报文转发方法、asr及isr |
US11496337B2 (en) | 2021-01-13 | 2022-11-08 | Cisco Technology, Inc. | Openroaming based remote worker |
Also Published As
Publication number | Publication date |
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CN102036215A (zh) | 2011-04-27 |
CN102036215B (zh) | 2013-05-08 |
US20120176970A1 (en) | 2012-07-12 |
EP2469962A1 (en) | 2012-06-27 |
EP2469962A4 (en) | 2015-02-18 |
KR20120079116A (ko) | 2012-07-11 |
KR101354869B1 (ko) | 2014-01-22 |
JP5427952B2 (ja) | 2014-02-26 |
JP2013506326A (ja) | 2013-02-21 |
US8665849B2 (en) | 2014-03-04 |
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