Method for requesting radio resource in mobile communications system
A method for requesting radio resource using a control signal in an evolved universal telecommunications system (E-UMTS) is disclosed. A terminal requests a radio resource for data transmission from a base station by selectively using the control signal or a random access channel (RACH) if data transmission to the base station is required when the terminal has no uplink radio resource. Fast data transmission is ensured since the terminal can quickly transmit the radio resource request message to the base station using the RACH or the control signal and can quickly acquire the radio resource from the base station.
1. A method for scheduling radio resources in a mobile communications system, the method comprising:
transmitting a control signal comprising an indication that a radio resource is requested;
receiving a first allocated radio resource; and
transmitting a message using the first allocated radio resource.
2. The method of claim 1 , wherein the message comprises a request for a second radio resource if an amount of data left to transmit is more than an amount of data that can be transmitted using the first allocated radio resource or the message comprises only data if the amount of data left to transmit is less than or equal to the amount of data that can be transmitted using the first allocated radio resource.
3. The method of claim 1 , wherein the message is a request for a second radio resource and further comprising:
receiving a second allocated radio resource; and
transmitting data using the second allocated radio resource.
4. The method of claim 3 , wherein the request for the radio resource comprises data.
5. The method of claim 1 , wherein the control signal comprises one of CQI information, an ACK/NACK and a status report message.
6. A method for scheduling radio resources in a mobile telecommunications system, the method comprising:
transmitting an indication that a radio resource is requested, the indication included in one of a preamble transmitted over a random access channel (RACH) and a control signal transmitted over a control channel;
receiving a first allocated radio resource;
transmitting a request for a second radio resource using the first allocated radio resource, the request comprising data;
receiving a second allocated radio resource; and
transmitting data using the second allocated radio resource.
7. The method of claim 6 , wherein transmitting the indication that a radio resource is requested comprises:
Including the indication into one of the preamble and the control signal according to the determining step.
8. The method of claim 6 , wherein transmitting the indication that a radio resource is requested comprises:
determining a data service type.
9. The method of claim 8 , wherein transmitting the indication that a radio resource is requested comprises:
including the indication that a radio resource is requested in the preamble if the data service type is susceptible to delay time or including the indication that a radio resource is requested in the control signal if the data service type is not susceptible to delay time.
10. The method of claim 6 , wherein transmitting the indication that a radio resource is requested comprises:
determining a data service priority.
11. The method of claim 10 , wherein transmitting the indication that a radio resource is requested comprises:
calculating a first time required to acquire the radio resource using the RACH and a second time required to acquire the radio resource using the control signal and including the indication in one of the preamble and the control signal according to which of the calculated first time and second time is less if the data service is determined to have high priority.
12. The method of claim 10 , wherein transmitting the indication that a radio resource is requested comprises:
including the indication in the control signal if the data service is determined to have low priority.
13. A method for scheduling radio resources in a mobile telecommunications system, the method comprising:
receiving a control signal comprising an indication that a radio resource is requested;
transmitting a first allocated radio resource; and
receiving a message transmitted using the first allocated radio resource.
14. The method of claim 13 , wherein the message comprises a request for a second radio resource if an amount of data left to transmit in a mobile terminal that transmitted the message is more than an amount of data that can be transmitted using the first allocated radio resource or the message comprises only data if the amount of data left to transmit in the mobile terminal is less than or equal to the amount of data that can be transmitted using the first allocated radio resource.
15. The method of claim 13 , wherein the message is a request for a second radio resource and further comprising:
transmitting a second allocated radio resource; and
receiving data transmitted using the second allocated radio resource.
16. The method of claim 15 , wherein the request for the radio resource comprises data.
17. The method of claim 13 , further comprising:
determining whether data is left for transmission in a mobile terminal from which the message was received.
18. The method of claim 13 , wherein the control signal comprises one of CQI information, an ACK/NACK and a status report message.
19. A method for scheduling radio resources in a mobile telecommunications system, the method comprising:
receiving an indication that a radio resource is requested, the indication included in one of a preamble transmitted over a random access channel (RACH) and a control signal transmitted over a control channel;
transmitting a first allocated radio resource;
receiving a request for a radio resource transmitted using the first allocated radio resource, the request comprising data;
transmitting a second allocated radio resource; and
receiving data transmitted using the second allocated radio resource.
20. The method of claim 19 , wherein the indication that a radio resource is requested is received in the preamble if a data service type is susceptible to delay time or the indication is received in the control signal if the data service type is not susceptible to delay time.
21. The method of claim 19 , wherein the indication that a radio resource is requested is received in the preamble if a data service has high priority and a time required for a mobile communication terminal transmitting the indication to acquire the radio resource using the RACH is less than a time required for the mobile communication terminal to acquire the radio resource using the control signal.
22. The method of claim 19 , wherein the indication that a radio resource is requested is received in the control signal if the data service has low priority or the data service has high priority and the time required for the mobile communication terminal to acquire the radio resource using the RACH is more than the time required for the mobile communication terminal to acquire the radio resource using the control signal.