Method and apparatus for obtaining destination IP address

摘要

Embodiments of the present invention provide a method and an apparatus for obtaining a destination IP address and are related to the field of communications technologies, for improving a data sending success rate in a network. The method includes: receiving a request sent by a terminal device, obtaining a destination IP address from a network-side device according to the request, and sending the destination IP address to the terminal device. The method and the apparatus for obtaining a destination IP address provided by the embodiments of the present invention are applied in an M2M technology.

主权项

1. A method for obtaining a destination IP address during a machine to machine (M2M) communication, the method comprising:
at a mobility management entity, receiving a tracking area update request sent by a terminal device of a M2M communication network; at the mobility management entity, in response to the tracking area update, sending a location update request to a home subscriber server, wherein the location update request is configured to initiate a cancel location request for a prior mobility management entity serving the terminal device; at the mobility management entity, obtaining a destination IP address from a network-side device of the M2M communication network in response to the location update request, wherein the obtaining comprises receiving a location update response sent by the home subscriber server, wherein the location update response carries subscription data, and the subscription data comprises a network provided destination feature and the destination IP address, wherein the destination IP address is an IP address of the network-side device, wherein obtaining the destination IP address comprises
sending a modify bearer request or a create bearer request to a gateway device, to obtain a destination IP address obtained by the gateway device when, according to the network provided destination feature in subscription data in a location update response, the destination IP address is sent to the terminal device, wherein the modify bearer request or the create bearer request carries the network provided destination feature, andreceiving a modify bearer response or a create bearer response sent by the gateway device, wherein the modify bearer response or the create bearer response carries the destination IP address obtained by the gateway device; and at the mobility management entity, transmitting a tracking area update request response comprising the destination IP address from the network-side device to the terminal device; and at the mobility management entity, receiving a tracking area update complete message indicating the terminal device has received the destination IP address and inter-area management of the terminal device is complete so that the terminal device sends uplink data according to the destination IP address.