| 摘要 |
<p>PURPOSE:To measure a radio wave interference ratio more accurately by devising a radio base station to distinguish the radio wave interference from collision of incoming control channel signals. CONSTITUTION:When an incoming control channel signal sent from a mobile station 1 collides with an incoming control channel signal sent by a mobile station 2, the mobile stations 1, 2 set number of times of collision and a radio frame location in collision to a collision radio frame location information memory 5, and a radio base station 3 sets a radio frame location corresponding to the radio frame location in a radio frame state memory 6 to an interference state. The mobile station 1 sends the radio frame location where collision takes place while being included in the incoming control channel signal at succeeding retransmission and deletes the content of the collision radio frame location information memory 5 when the signal is normally sent. The radio base station 3 receiving this signal revises the radio frame state corresponding to the radio frame location in the radio frame state memory 6 to an idle state.</p> |
