Patent ID: 8379533

Claim:
A communication method of a universal plug and play (UPnP) remote access client (RAC) providing remote access service, the communication method comprising: receiving external inputs of an identifier of a UPnP remote access server (RAS) to generate a credential, and a session initiation protocol (SIP) identifier of the RAS; generating a payload of a first SIP packet, which is described in extensible markup language (XML) format, and includes a credential identifier (ID) generated based on the identifier of the RAS and remote access transport agent (RATA) capability information; and transmitting the first SIP packet to the RAS identified by the SIP identifier, wherein the identifier of the RAS is a product identification number (PIN) allocated to the RAS, and wherein the payload of the first SIP packet includes multipurpose internet mail extensions (MIME)-type information such that the payload is identified as information to provide remote access service.