A method for handover management of a mobile node, MN, for an Identifier and Locator separation framework, when a current source radio access network, RAN, of the MN determines that the MN needs to initiate a handover, the method comprises: the source RAN initiating a handover request including information of a target RAN to a first access gateway router, AGR1, and the AGR1 transmitting the handover request to a second access gateway router, AGR2, of the target RAN according to the information of the target RAN; the AGR2, after receiving the handover request, allocating a new route location identifier, RID, for the MN, establishing a new Identifier and Locator mapping relationship of the MN which is a mapping relationship between an AID of the MN and the new RID of the MN; the AGR2 returning a handover response to the AGR1, obtaining a mapping relationship between the AID and the RID of all correspondent nodes, CNs, in communication with the MN from the AGR1; after receiving the handover response, the AGR1 transmitting a handover command to the MN through the source RAN; the MN initiating an access request to the target RAN through the AGR2 according to the received handover command, and finishing the handover to the target RAN; after receiving a handover completion message transmitted by the target RAN, the AGR2 notifying a third access gateway router, AGR3, where the CN is located of the new Identifier and Locator mapping relationship of the MN according to the obtained information of the CN; wherein the AID is configured for each user, and maintains unchanged all the time in a movement process; the method further comprising: the AGR2, after receiving the handover request, establishing a forwarding relationship with the AGR1; and the AGR1 transmitting a received data message transmitted towards the MN to the AGR2 during the handover, and the AGR2 forwarding the data message to the MN. the source RAN initiating a handover request including information of a target RAN to a first access gateway router, AGR1, and the AGR1 transmitting the handover request to a second access gateway router, AGR2, of the target RAN according to the information of the target RAN; the AGR2, after receiving the handover request, allocating a new route location identifier, RID, for the MN, establishing a new Identifier and Locator mapping relationship of the MN which is a mapping relationship between an AID of the MN and the new RID of the MN; the AGR2 returning a handover response to the AGR1, obtaining a mapping relationship between the AID and the RID of all correspondent nodes, CNs, in communication with the MN from the AGR1; after receiving the handover response, the AGR1 transmitting a handover command to the MN through the source RAN; the MN initiating an access request to the target RAN through the AGR2 according to the received handover command, and finishing the handover to the target RAN; after receiving a handover completion message transmitted by the target RAN, the AGR2 notifying a third access gateway router, AGR3, where the CN is located of the new Identifier and Locator mapping relationship of the MN according to the obtained information of the CN; wherein the AID is configured for each user, and maintains unchanged all the time in a movement process; the method further comprising: the AGR2, after receiving the handover request, establishing a forwarding relationship with the AGR1; and the AGR1 transmitting a received data message transmitted towards the MN to the AGR2 during the handover, and the AGR2 forwarding the data message to the MN. the AGR2, after receiving the handover request, establishing a forwarding relationship with the AGR1; and the AGR1 transmitting a received data message transmitted towards the MN to the AGR2 during the handover, and the AGR2 forwarding the data message to the MN. <EOS>