Method for information notification and method and access node for forwarding data message during handover procedure

An information reporting method, comprising:

• in a network that (a) separates the dual functions of an Internet Protocol (IP) address for identifying identity and location and that (b) uses an access identifier (AID) as an identity identifier and a routing-location identifier (RID) as a location identifier, wherein the AID is a unique identity allocated to each user terminal in the network, used in an access layer, and kept unchanged during movement of the user terminal to which the AID is allocated, and wherein the RID is allocated by an access node (AN) to a terminal and is used for routing to the AN according to the RID,
• the terminal establishing a communication with a correspondent node via access nodes which the terminal and the correspondent node access respectively,
• the access node which the terminal accesses reporting communication relationship information about the terminal and the correspondent node and mapping information about an identity identifier and the location identifier of the correspondent node, that is, AID-RID mapping information of the correspondent node, to a home identity location register (ILR) of the terminal;
• the home ILR of the terminal storing the received communication relationship information and the AID-RID mapping information of the correspondent node and returning a success response;
• and
• after the terminal has received the success response, the access node which the terminal accesses deleting the reported communication relationship information about the terminal and the correspondent node;
• wherein after having acquired a new location identifier of the terminal, that is, a new RID of the terminal, the ILR instead of an access node which allocated the new RID to the terminal, sends a notification of updating the location identifier of the terminal to one or more access nodes which the correspondent node accesses according to the stored AID-RID mapping information of the correspondent node, wherein the notification sent by the ILR to the access nodes carries the identity identifier and a new location identifier of the terminal, that is, the AID and the new RID of the terminal.

A handover method, applied in a network with separated identity identifier and location, comprising:

• a terminal establishing a communication with a correspondent node, a first access node which the terminal accesses reporting to a home identity location register (ILR) of the terminal mapping information about the identity identifier and location identifier of the correspondent node of the terminal, and the ILR storing the mapping information about the correspondent node of the terminal;
• after having received a handover request sent from a current access network of the terminal, the first access node starting the handover and initiating a handover request toward a second access node, if there is still mapping information which is not reported to the ILR in the mapping information about the correspondent node of the terminal locally stored by the first access node, then reporting the mapping information which is not reported to the ILR to the ILR, and the ILR storing the received mapping information;
• and
• after having received the handover request, the second access node allocating a new location identifier to the terminal and notifying the ILR to update the location identifier of the terminal, carrying the new location identifier of the terminal;
• and after having received the notification of the second access node, the ILR acquiring the new location identifier of the terminal.

A method for forwarding data message during a handover, comprising:

• in a network that (a) separates the dual functions of an Internet Protocol (IP) address for identifying identity and location and that (b) uses an access identifier (AID) as an identity identifier and a routing-location identifier (RID) as a location identifier, wherein the AID is a unique identity allocated to each user terminal in the network, is used in an access layer, and kept unchanged during movement of the user terminal to which the AID is allocated, and wherein the RID is allocated by an access node (AN) to a terminal and is used for routing to the AN according to the RID,
• the terminal establishing a communication with a correspondent node,
• an access node which the terminal accesses reporting to a home identity location register (ILR) of the terminal mapping information about the identity identifier and the location identifier of the correspondent node of the terminal, that is, AID-RID mapping information of the correspondent node of the terminal,
• the ILR storing the mapping information about the identity identifier and the location identifier of the correspondent node of the terminal, wherein the location identifier of the correspondent node is allocated by an access node the correspondent node accesses and is encapsulated in a data message to be routed to the access node the correspondent node accesses;
• after having updated mapping information about the terminal, that is, updated AID-RID mapping information of the terminal, the ILR, instead of a second access node at a handover-in side of the terminal, sending a notification of updating the mapping information about the terminal to one or more access nodes which the correspondent node accesses according to the stored AID-RID mapping information of the correspondent node of the terminal, wherein the notification sent by the ILR to the access nodes carries the updated AID-RID mapping information of the terminal;
• and
• after having received the updated AID-RID mapping information of the terminal, the access node which the correspondent node accesses, when receiving a data message sent from the correspondent node to the terminal, sending the data message to the second access node at the handover-in side of the terminal according to an updated location identifier of the terminal, that is, an updated RID of the terminal.

An access node, comprising a terminal information reporting unit and a correspondent node information reporting unit, wherein

• the access node is located in a network that (a) separates the dual functions of an Internet Protocol (IP) address for identifying identity and location and that (b) uses an access identifier (AID) as an identity identifier and a routing-location identifier (RID) as a location identifier, wherein the AID is a unique identity allocated to each user terminal in the network, is used in an access layer, and is kept unchanged during movement of the user terminal, and wherein the RID is allocated by an access node (AN) to a terminal and is used for routing to this AN according to this RID;
• the terminal information reporting unit is configured to:
• when a terminal accesses, allocate a new location identifier to the terminal and report the identity identifier and new location identifier of the terminal, that is, the AID and a new RID, to a home identity location register (ILR) of the terminal to be stored by the home ILR of the terminal;
• and
• the correspondent node information reporting unit is configured to:
• when the terminal establishes a communication with a correspondent node, report communication relationship information about the terminal and the correspondent node and mapping information about the identity identifier and location identifier of the correspondent node, that is, the AID-RID mapping information of the correspondent node, to the home ILR of the terminal to be stored by the home ILR of the terminal;
• wherein after having acquired a new location identifier of the terminal, that is, a new RID of the terminal, the ILR instead of an access node which allocated the new RID to the terminal, sends a notification of updating the location identifier of the terminal to one or more access nodes which the correspondent node accesses according to the stored AID-RID mapping information of the correspondent node of the terminal, the notification sent by the ILR to the access nodes carrying the identity identifier and a new location identifier of the terminal, that is, the AID and the new RID of the terminal.

An identity location register, comprising an information storage unit and a location identifier update unit, wherein

• the identity location register is located in a network that (a) separates the dual functions of an Internet Protocol (IP) address for identifying identity and location and that (b) uses an access identifier (AID) as an identity identifier and a routing-location identifier (RID) as a location identifier, wherein the AID is a unique identity allocated to each user terminal in the network, is used in an access layer, and is kept unchanged during movement of the user terminal to which the AID is allocated, and wherein the RID is allocated by an access node (AN) to a terminal and is used for routing to the AN according to the RID;
• the information storage unit is configured to:
• receive mapping information about the identity identifier and location identifier of a correspondent node of a terminal, that is, the AID-RID mapping information of a correspondent node of a terminal, reported by an access node and mapping information about the correspondent node of the terminal to store locally;
• and
• the location identifier update unit is configured to:
• after having acquired a new location identifier of the terminal, update the location identifier in the locally stored mapping information about the correspondent node of the terminal;
• wherein the location identifier update unit is further configured to:
• after having acquired a new location identifier of the terminal, that is, a new RID of the terminal, send a notification of updating the location identifier of the terminal to one or more access nodes which the correspondent node accesses according to the locally stored AID-RID mapping information of the correspondent node of the terminal, the notification carrying the identity identifier and new location identifier of the terminal, that is, the AID and the new RID of the terminal.