Method, device, and multi-address space mobile network for sending data and forwarding data

A method for sending data, comprising:

• obtaining locator domain (LD) identifiers (IDs) of a first LD, wherein the first LD belongs to a first Internet service provider (ISP) and a second ISP, and selecting one LD ID as a source LD ID;
• encapsulating the source LD ID in a data packet sent to a second host, wherein the second host belongs to a second LD;
• and
• sending the data packet to an LD border router (LDBR) of the first LD, wherein the LDBR is connected to an ISP network that the LDBR belongs to.

A router, comprising:

• a receiving unit, configured to receive a first data packet sent by a first host to a second host, wherein the first host belongs to a first locator domain (LD), the first LD belongs to a first Internet service provider (ISP) and a second ISP, the ISPs to which the first LD belongs allocate LD identifiers (IDs) to the first LD, and the second host belongs to a second LD;
• a selection unit, configured to select one LD ID of the first LD as a source LD ID according to a preset traffic engineering (TE) policy, so as to obtain a second data packet corresponding to the first data packet;
• and
• a sending unit, configured to send the second data packet obtained by the selection unit to an ISP network corresponding to the source LD ID selected by the selection unit.

A host device, comprising:

• a locator domain identifier (LD ID) obtaining unit, configured to obtain LD IDs of a first LD belonging to Internet service providers (ISPs), wherein the first LD belongs to a first ISP and a second ISP, and the ISPs to which the first LD belongs allocate the LD IDs to the first LD;
• an LD ID selection unit, configured to select one from the obtained LD IDs;
• an encapsulation unit, configured to take the LD ID selected by the LD ID selection unit as a source LD ID and encapsulate the source LD ID in a data packet sent to a second host, wherein the second host belongs to a second LD;
• and
• a sending unit, configured to send the data packet encapsulated by the encapsulation unit to a first LD border router (LDBR) connected to an ISP network to which the first LD belongs.

A multi-address space mobile network, comprising:

• a plurality of LDs adopting independent address spaces, wherein each LD has a unique LD identifier (LD ID) in the network;
• a first LD belongs to a first Internet service provider (ISP) and a second ISP, different LDs are connected to each other through LD border routers (LDBR)s;
• a first host belongs to the first LD, a second host belongs to a second LD, and the ISPs to which the first LD and the second LD belong allocate the LD IDs to the first LD and the second LD respectively;
• the first host, configured to send a first data packet to the second host;
• and
• a first LDBR, configured to receive a data packet sent by the first host, select one LD ID of the first LD as a source LD ID according to a preset traffic engineering (TE) policy, so as to obtain a second data packet corresponding to the first data packet, and select an ISP network corresponding to the source LD ID to forward the second data packet.