| 摘要 |
PURPOSE:To attain the switching of an optimum frequency without missing data reception by testing the reception state of other frequency when no data to its own station is sent. CONSTITUTION:Base stations A, B, C allow a mobile station 6 to recognize a time up to a slot to be received next when the mobile station 6 receives a packet including a data to its own station whole the time information up to the slot (unit of time) to be received next is included in a packet (unit of data). Then the mobile station 6 selects other frequency up to the slot to be received next, tests the reception state in advance and stores it and selects the optimum frequency according to the storage in case of frequency switching. Thus, the optimum base station frequency is selected without missing the reception of the data to its own station from the base station used so far. |
