METHOD OF OPERATING DIRECTORY PROXY AGENT IN LOW POWER WIRELESS PERSONAL AREA NETWORK, METHOD OF SEARCHING FOR SPECIFIC SERVICE INFORMATION THEREIN, AND DIRECTORY PROXY AGENT PERFORMING THE SAME THEREIN

摘要

A method of operating a directory proxy agent (DPA) in a low-power wireless personal area network (LoWPAN) includes advertising a service registration request message to neighboring nodes including at least one service agent and at least one user agent to receive a service registration message from the at least one service agent, storing information for the at least one service agent to a memory to refresh a service information list when the at least one service is not stored in the memory, and transmitting the service information list to at least one directory agent or another DPA to cause the at least one directory agent or the other DPA to be consistent with information for the at least one service agent. Thus, the method may use a DPA to effectively search for information for a service desired by a user agent.