Method and apparatus for handover in mobile content centric network

A handover method of a target node in a wireless communication system, the method comprising:

• receiving, from a source node, a first request that the target node excludes, from transmission from the target node to a user equipment (UE) of data directed to the UE, first data directed to the UE that has been transmitted from the source node to the UE;
• transmitting, to the source node, a second request, that the source node excludes, from transmission from the source node to the target node of data directed to the UE that is cached at the source node, second data directed to the UE that has been received from an entry node by the target node and cached by the target node;
• receiving, from the source node, cached data directed to the UE cached by the source node except the second data;
• transmitting, to the entry node, a third request that the entry node excludes, from a transmission of the data directed to the UE from the entry node to the target node, the second data and the cached data from the source node;
• receiving, from the entry node, data directed to the UE except the first data, the second data, and the cached data from the source node;
• and
• in response to detecting the UE completing a handover, transmitting to the UE, contents of the data directed to the UE received from the entry node.

A handover method of an entry node in a wireless communication system, the method comprising:

• receiving a request, from a target node, that the entry node to excludes, from a transmission of data directed to a user equipment (UE) from the entry node to the target node, data directed to the UE that has been cached by the target node;
• and
• transmitting, by the entry node to the target node, data directed to the UE except first data, second data and the cached data,
• wherein the first data has been transmitted from a source node to the UE, and wherein the second data has been transmitted from the source node to the target node.

An apparatus of a source node in a wireless communication system, the apparatus comprising:

• a transceiver:
• a storage unit configured to store contents;
• and
• at least one processor, wherein the at least one processor is configured to control to:
• in response to detecting a user equipment (UE) performing a handover, cache data directed to the UE received from an entry node,
• transmit, to a target node, a first request that the target node excludes, from transmission from the target node to the UE of the data directed to the UE, first data directed to the UE that has been transmitted by the source node to the UE,
• receive, from the target node, a second request that the source node excludes, from transmission from the source node to the target node of the cached data directed to the UE, second data directed to the UE that has been received from the entry node by the target node and cached by the target node,
• and transmit, to the target node, cached data directed to the UE except the first and second data,
• wherein the first data and the second data are excluded from the data directed to the UE transmitted from the entry node to the target node.

An apparatus of a target node in a wireless communication system, the apparatus comprising:

• a transceiver;
• a storage unit configured to store contents;
• and
• at least one processor, wherein the at least one processor is configured to control to:
• receive, from a source node, a first request that the target node excludes, from transmission from the target node to user equipment (UE) of data directed to the UE, first data directed to the UE that has been transmitted from a source node to the UE,
• transmit, to the source node, a second request that the source node excludes, from transmission from the source node to the target node of data directed to the UE that is cached at the source node, second data directed to the UE that has been received from an entry node by the target node and cached by the target node,
• receive, from the source node, data directed to the UE cached by the source node except the second data,
• transmit, to the entry node, a third request that the entry node excludes, from a transmission of the data directed to the UE from the entry node to the target node, the second data and the cached data from the source node,
• receive, from the entry node at the target node, data directed to the UE except the first data, the second data, and the cached data from the source node, and
• in response to detecting the UE completing a handover, transmit, from the target node to the UE, contents of the data directed to the UE received from the entry node.

An apparatus of an entry node in a wireless communication system, the apparatus comprising:

• a transceiver;
• a storage unit configured to store contents;
• and
• at least one processor, wherein the at least one processor is configured to control to:
• receive, from a target node, a request to exclude, from a transmission of data directed to a user equipment (UE) from the entry node to the target node, data directed to the UE that has been cached by the target node,
• and transmit, by the entry node to the target node, data directed to the UE except first data, second data, and the cached data,
• wherein the first data has been transmitted from a source node to the UE, and
• wherein the second data has been transmitted from the source node to the target node.