Patent ID: 8320345
Filing Date: 2012-11-27
Classification: H04L,H04W,Y02D

Abstract:
1. A radio communication method of finding synchronization between radio communication apparatus groups using different radio communication schemes from each other while performing ad hoc network communication between radio communication apparatuses using a same radio communication scheme, the method comprising: in the radio communication apparatus groups, finding synchronization by employing an end tone to identify an end of a super-frame; in radio communication apparatuses that belong to the radio communication apparatus groups, transmitting a tone signal to report an existence of the radio communication apparatus groups, wherein the tone signal is transmitted in an existence confirmation slot per radio communication scheme provided in the super-frame, and used to determine a slot that is assigned to the radio communication apparatus groups that use the radio communication schemes in the super-frame; deciding, employing the tone signal, whether there is at least one radio communication apparatus that uses a different modulation scheme from a modulation scheme used by one of the radio communication apparatus groups, in the vicinity of the one radio communication apparatus group; selecting a slot time in which there is no radio communication apparatus that uses the different modulation scheme when there is the at least one radio communication apparatus that uses the different modulation scheme in the vicinity; and reporting another slot time as a time that can be used by a radio communication group that uses the different modulation scheme by employing the tone signal, and thereby performing radio communication in the selected time slot.