Patent ID: 8040841
Filing Date: 2011-10-18
Classification: H04W

Abstract:
1. A wireless communication system comprising at least one wireless terminal and one wireless base station, said wireless terminal being connected to said wireless base station via a wireless network and a heterogeneous network which is an arbitrary communication network different from said wireless network, wherein said wireless terminal includes: a first wireless communicator that sends out a ranging signal to said wireless base station via said wireless network to establish communication with said wireless base station; and a parameter adjuster that adjusts a communication parameter of said ranging signal depending on adjusted value information contained in a response signal received from said wireless base station via said wireless network, said wireless base station includes: a parameter determiner that determines whether or not the communication parameter of said ranging signal received from said wireless terminal via said wireless network is within a pre-determined range; and a second wireless communicator that sends back said response signal that includes completion notification if the communication parameter of said ranging signal is within the pre-determined range, or that includes said adjusted value information if the parameter is not within the pre-determined range, to said wireless terminal via said wireless network, and if said wireless base station cannot receive said ranging signal from said wireless terminal or if the adjustment is not completed even after said wireless terminal adjusts said communication parameter depending on said adjusted value information for a pre-determined number of times, negotiation is performed via said heterogeneous network to establish a communication connection for upstream communication from said wireless terminal to said wireless base station, and only downstream communication from said wireless base station to said wireless terminal is performed via said wireless network.