US Patent No. 10,368,388

METHOD FOR PEER TO PEER COMMUNICATION AND RELATED COMMUNICATION DEVICE


Patent No. 10,368,388
Issue Date July 30, 2019
Title Method For Peer To Peer Communication And Related Communication Device
Inventorship Xujing Zhang, Taipei (TW)
Lin Cheng, Taipei (TW)
Assignee Sercomm Corporation, Taipei (TW)

Claim of US Patent No. 10,368,388

1. A method for P2P communication, for a first base station of a mobile communication system, where a base station interface is established between the first base station and a second base station of the mobile communication system, the method comprising:obtaining an IP address of a first user equipment and a TEID corresponding to a radio bearer established between the first user equipment and the first base station;
transmitting first routing information to the second base station via the base station interface, wherein the first routing information includes the IP address of the first user equipment, the TEID corresponding to the radio bearer between the first user equipment and the first base station, and an IP address of the first base station;
receiving second routing information from the second base station via the base station interface, wherein the second routing information includes an IP address of a second user equipment, a TEID corresponding to a radio bearer between the second user equipment and the second base station, and an IP address of the second base station;
storing the second routing information;
receiving a data transmission requesting message from the first user equipment, wherein the data transmission requesting message includes an IP packet and a target IP address of a target user equipment;
determining whether the target IP address is the same as the IP address of the second user equipment in the second routing information;
obtaining the TEID corresponding to the radio bearer between the second user equipment and the second base station and the IP address of the second base station in the second routing information if the target IP address is the same as the IP address of the second user equipment in the second routing information;
generating a user data packet, wherein the user data packet includes a user datagram protocol header (UDP-Header), a general packet radio service tunneling protocol header (GTP-Header) and the IP packet, and a TEID field of the GTP-Header is configured according to the TEID corresponding to the radio bearer between the second user equipment and the second base station in the second routing information; and
transmitting the user data packet to the second base station via the base station interface according to the IP address of the second base station in the second routing information;
wherein the base station interface does not pass through a core network of the mobile communication system.