Patent ID: 9049726
Filing Date: 2015-06-02
Classification: H04W

Abstract:
1. A heterogeneous-systems coexistence method for allowing a first wireless system and a second wireless system to coexist with each other, wherein communications schemes of the first and second wireless systems utilize white spaces and are different from each other, the heterogeneous-systems coexistence method comprising the steps of: acquiring, by a heterogeneous-systems coexistence unit, information about frequency channels via a terminal unit of the first wireless system, wherein the information is acquired by utilizing a communications path established under the first wireless system, the frequency channels acquired are available to a base station of the second wireless system, and the base station of the second wireless system includes the heterogeneous-systems coexistence unit; starting, by the base station of the second wireless system, communications by utilizing a subject frequency channel, wherein the subject frequency channel is identified from among the frequency channels provided in the information acquired by the heterogeneous-systems coexistence unit; receiving and storing, by a network management unit, information regarding the subject frequency channel actually utilized by the base station of the second wireless system from the heterogeneous-systems coexistence function unit of the second wireless system, wherein a base station of the first wireless system includes the network management unit; storing, by the network management unit of the first wireless system, information regarding a quiet period being set on the subject frequency channel utilized by the base station of the second wireless system; and making, by the base station of the first wireless system, a presence confirmation of a wireless-frequency utilization made by a system other than the first and second wireless systems when a frequency channel utilized by the base station of the first wireless system is different than the subject frequency channel utilized by the second wireless system as indicated in the information stored by the network management unit, wherein the presence confirmation is made via the subject frequency channel utilized by the second wireless system and is made in synchronization with the quiet period of the second wireless system.