Method and apparatus for performing early frequency measurement and fast reporting by terminal in disconnected state in next generation mobile communication system
The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure discloses a method and apparatus for performing early frequency measurement and fast reporting a result of frequency measurement.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving a radio resource control (RRC) release message including information on a measurement to be performed while the terminal is in an RRC inactive state;
in case that the information includes first information on a first list of carriers to be measured during the RRC inactive state and second information on a second list of carriers to be measured during the RRC inactive state, performing, while the terminal is in the RRC inactive state, a measurement for the first list of carriers and the second list of carriers based on the first information and the second information included in the information of the RRC release message; and
in case that the information does not include both of the first information and the second information:
receiving, from a base station, a first system information block (SIB) associated with an inactive measurement, the first SIB including the first information on the first list of carriers and the second information on the second list of carriers; and
performing, while the terminal is in the RRC inactive state, a measurement for the first list of carriers and the second list of carriers based on the first information and the second information included in the first SIB,
wherein the first list of carriers corresponds to an Evolved Universal mobile telecommunications system Terrestrial Radio Access (EUTRA), and the second list of carriers corresponds to a New Radio (NR).
2. The method of claim 1 , further comprising:
transmitting, to the base station, a first message including information indicating that the terminal has available measurement information;
receiving, from the base station, a second message requesting the available measurement information; and
transmitting, to the base station, a third message including a result of the measurement performed while the terminal is in the RRC inactive state,
wherein the result of the measurement includes a first result for the first list of carriers and a second result for the second list of carriers.
3. The method of claim 1 ,
wherein the RRC release message further includes measurement duration information, validity area information, and threshold information,
wherein the method further comprises starting a T331 timer based on a value of the measurement duration information, and
wherein the measurement is performed during the T331 timer is running.
4. The method of claim 1 , wherein the measurement is performed, in case that the terminal supports a report of the measurement which was performed during the RRC inactive state.
5. The method of claim 4 , wherein the measurement is performed, in case that a second SIB received from the base station includes information indicating the terminal to perform the measurement and report a result of the measurement.
6. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a radio resource control (RRC) release message including information on a measurement to be performed while the terminal is in an RRC inactive state; and
transmitting, to the terminal, a first system information block (SIB) associated with an inactive measurement,
wherein, while the terminal is in the RRC inactive state, a measurement is performed for a first list of carriers corresponding to an Evolved Universal mobile telecommunications system Terrestrial Radio Access (EUTRA) and a second list of carriers corresponding to a New Radio (NR),
wherein, in case that the information includes first information on the first list of carriers and second information on the second list of carriers, the measurement is performed based on the first information and the second information included in the information of the RRC release message, and
wherein, in case that the information does not include both of the first information and the second information and the first SIB includes the first information and the second information, the measurement is performed based on the first information and the second information included in the first SIB.
7. The method of claim 6 , further comprising:
receiving, from the terminal, a first message including information indicating that the terminal has available measurement information;
transmitting, to the terminal, a second message requesting the available measurement information; and
receiving, from the terminal, a third message including a result of the measurement performed while the terminal is in the RRC inactive state,
wherein the result of the measurement includes a first result for the first list of carriers and a second result for the second list of carriers.
8. The method of claim 6 ,
wherein the RRC release message further includes measurement duration information, validity area information, and threshold information,
wherein a T331 timer is started based on a value of the measurement duration information, and
wherein the measurement is performed during the T331 timer is running.
9. The method of claim 6 , wherein the measurement is performed, in case that the terminal supports a report of the measurement which was performed during the RRC inactive state.
10. The method of claim 9 , wherein the measurement is performed, in case that a second SIB transmitted to the terminal includes information indicating the terminal to perform the measurement and report a result of the measurement.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit or receive a signal; and
a controller configured to:
receive a radio resource control (RRC) release message including information on a measurement to be performed while the terminal is in an RRC inactive state,
in case that the information includes first information on a first list of carriers to be measured during the RRC inactive state and second information on a second list of carriers to be measured during the RRC inactive state, perform, while the terminal is in the RRC inactive state, a measurement for the first list of carriers and the second list of carriers based on the first information and the second information included in the information of the RRC release message, and
in case that the information does not include both of the first information and the second information:
receive, from a base station, a first system information block (SIB) associated with an inactive measurement, the first SIB including the first information on the first list of carriers and the second information on the second list of carriers, and
perform, while the terminal is the RRC inactive state, a measurement for the first list of carriers and second list of carriers based on the first information and the second information included in the first SIB,
wherein the first list of carriers corresponds to an Evolved Universal mobile telecommunications system Terrestrial Radio Access (EUTRA), and the second list of carriers corresponds to a New Radio (NR).
12. The terminal of claim 11 , wherein the controller is further configured to:
transmit, to the base station, a first message including information indicating that the terminal has available measurement information,
receive, from the base station, a second message requesting the available measurement information, and
transmit, to the base station, a third message including a result of the measurement performed while the terminal is in the RRC inactive state, and
wherein the result of the measurement includes a first result for the first list of carriers and a second result for the second list of carriers.
13. The terminal of claim 11 ,
wherein the RRC release message further includes measurement duration information, validity area information, and threshold information,
wherein the controller is further configured to start a T331 timer based on a value of the measurement duration information, and
wherein the measurement is performed during the T331 timer is running.
14. The terminal of claim 11 , wherein the measurement is performed, in case that the terminal supports a report of the measurement which was performed during the RRC inactive state.
15. The terminal of claim 14 , wherein the measurement is performed, in case that a second SIB received from the base station includes information indicating the terminal to perform the measurement and report a result of the measurement.
16. A base station in a wireless communication system, the base station comprising:
a transceiver configured to transmit or receive a signal; and
a controller configured to:
transmit, to a terminal, a radio resource control (RRC) release message including information on a measurement to be performed while the terminal is in an RRC inactive state, and
transmit, to the terminal, a first system information block (SIB) associated with an inactive measurement,
wherein, while the terminal is in the RRC inactive state, a measurement is performed for a first list of carriers corresponding to an Evolved Universal mobile telecommunications system Terrestrial Radio Access (EUTRA) and a second list of carriers corresponding to a New Radio (NR),
wherein, in case that the information includes first information on the first list of carriers and second information on the second list of carriers, the measurement is performed based on the first information and the second information included in the information of the RRC release message, and
wherein, in case that the information does not include both of the first information and the second information and the first SIB includes the first information and the second information, the measurement is performed based on the first information and the second information included in the first SIB.
17. The base station of claim 16 , wherein the controller is further configured to:
receive, from the terminal, a first message including information indicating that the terminal has available measurement information,
transmit, to the terminal, a second message requesting the available measurement information, and
receive, from the terminal, a third message including a result of the measurement performed while the terminal is in the RRC inactive state, and
wherein the result of the measurement includes a first result for the first list of carriers and a second result for the second list of carriers.
18. The base station of claim 16 ,
wherein the RRC release message further includes measurement duration information, validity area information, and threshold information,
wherein a T331 timer is started based on a value of the measurement duration information, and
wherein the measurement is performed during the T331 timer is running.
19. The base station of claim 16 , wherein the measurement is performed, in case that the terminal supports a report of the measurement which was performed during the RRC inactive state.
20. The base station of claim 19 , wherein the measurement is performed, in case that a second SIB transmitted to the terminal includes information indicating the terminal to perform the measurement and report a result of the measurement.