Push to talk mobile station, mobile communication system, and program
A mobile station 100 monitors, in Slotted mode, a Paging Channel Slot in a monitor cycle. The mobile station 100 includes: a user interface 53 which receives a PTT setting operation from a user for setting a PTT (Push to Talk) mode; a PTT communication control unit 51 which transmits an allocation request to the radio base station when the PTT setting operation is received; a slot cycle switching unit 52 which switches, when the PTT setting operation is received, the monitor cycle to a predetermined short cycle which is shorter than a cycle at the time of receiving the PTT setting operation; and a voice signal processing unit 40 which receives a voice packet after a PTT CALL is detected in a message transmitted from the radio base station to the mobile station, and reproduces a voice based on the voice packet.
1. A mobile station which (i) monitors, in a monitor cycle, a paging channel slot which stores a message therein and is transmitted by a radio base station in a transmission cycle, and (ii) performs a process according to the message, comprising:
a PTT setting reception unit operable to receive a PTT setting operation from a user for setting a PTT (Push to Talk) mode, in which a voice packet communication is available;
a monitor cycle switching unit operable to switch, when the PTT setting reception unit receives the PTT setting operation, the monitor cycle to a predetermined short cycle which is shorter than a cycle at a time of receiving the PTT setting operation;
a voice reproduction unit operable to receive a voice packet which is transmitted from the radio base station after a PTT CALL is detected in the message, and reproduce a voice based on the voice packet, the PTT CALL being a request for the voice packet communication; and
a PTT cancel reception unit operable to receive a PTT cancel operation from the user for canceling the PTT mode, wherein
when remaining battery charge falls below a predetermined value, the monitor cycle switching unit switches the monitor cycle to a predetermined long cycle which is longer than a cycle at a time of receiving the PTT cancel operation.
2. The mobile station of claim 1 , wherein
the monitor cycle switching unit switches the monitor cycle to the predetermined long cycle when the PTT cancel reception unit receives the PTT cancel operation.
3. A communication method performed by a mobile station which (i) monitors, in a monitor cycle, a paging channel slot which stores a message therein and is transmitted by a radio base station in a transmission cycle, and (ii) performs a process according to the message, the method comprising:
a PTT setting reception of receiving a PTT setting operation from a user for setting a PTT (Push to Talk) mode, in which a voice packet communication is available;
a monitor cycle switching step of switching, when the PTT setting operation is received in the PTT setting reception step, the monitor cycle to a predetermined short cycle which is shorter than a cycle at a time of receiving the PTT setting operation;
a voice reproduction step of receiving a voice packet which is transmitted from the radio base station after a PTT CALL is detected in the message, and reproducing a voice based on the voice packet, the PTT CALL being a request for the voice packet communication; and
a PTT cancel reception step of receiving a PTT cancel operation from the user for canceling the PTT mode, wherein
in the monitor cycle switching step, when remaining battery charge falls below a predetermined value, the monitor cycle is switched to a predetermined long cycle which is longer than a cycle at a time of receiving the PTT cancel operation.
4. The communication method of claim 3 , wherein
in the monitor cycle switching step, the monitor cycle is switched to the predetermined long cycle when the PTT cancel operation is received in the PTT cancel reception step.