| 摘要 |
PROBLEM TO BE SOLVED: To allow a user to recognize a caller even when a communication sequence is interrupted on the way by allowing a radio base station to set and send a caller telephone number in an individual station slot upon the receipt of a link channel setup request. SOLUTION: Receiving a link channel setup request message, a control channel control section 120 of a radio base station 100 discriminates whether or not assignment is available and when available, the result is set to an individual station slot and sends it. When not available, the control section 120 allows a timer control section 124 to start time measurement and sends a caller number message after a specified time expires. A control channel control section 140 of a mobile station 104 receives a reject message, the control section 140 informs it to a timer control section 144, which starts time measurement and after time expires, caller number message reception processing is conducted to receive a call number message from the radio base station 100. Thus, even when the communication sequence is interrupted on the way, the user of the mobile station recognizes the caller. |
