Patent ID: 8014368
Filing Date: 2011-09-06
Classification: H04W

Abstract:
1. A service provider discovery method in a wireless network environment comprising an infrastructure network, an ad-hoc network, and a gateway connecting the networks, the method comprising: receiving, by the gateway, a service request (SREQ) packet which is broadcasted from a first mobile node in the ad-hoc network; updating and transmitting, by the gateway, the SREQ packet to a service repository which stores at least one service provider information, in the infrastructure network; transmitting, by the service repository, to the gateway a service reply (SREP) packet comprising information relating to a service provider that provides a service requested by the SREQ packet; updating and transmitting, by the gateway, the SREP packet to the first mobile node; and joining, by a second mobile node providing another service, the ad-hoc network; generating, by the second mobile node, a duplicate address detection (DAD) packet comprising information describing said another service and transmitting the DAD packet to the gateway; checking, by the gateway, whether an address and the information describing said another service of the second mobile node are novel; transmitting, by the gateway, a registration request packet, in which the address and the information describing said another service of the second mobile node are recorded, to the service repository when at least one of the address and the information describing said another service of the second mobile node is novel; and registering, by the service repository, the information describing the second mobile node and said another service to a lookup table that stores the service provider information.