Method and apparatus for data transmission in wireless communication system
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long term evolution (LTE). The method for operating a primary base station in a wireless communication system is provided. The method includes transmitting, to a secondary base station, an addition request message, wherein the addition request message carries information of a secondary cell group (SCG) split bearer; and receiving, from the secondary base station, a response message of the addition request message.
1. A method for establishing a split bearer associated with a secondary cell group (SCG) performed by a primary base station of a master cell group (MCG) supporting a first radio access technology (RAT), the method comprising:
transmitting, to a secondary base station supporting a second RAT, an addition request message for requesting addition of the secondary base station including a first parameter for full quality of service (QOS), and a second parameter associated with guaranteed bit rate (GBR) QOS that is admittable by the MCG; and
receiving, from the secondary base station, an addition response message including a third parameter about QOS to be provided by the MCG,
wherein the third parameter does not exceed the second parameter, and
wherein the first RAT is 4th generation (4G) long term evolution (LTE) and the second RAT is 5th generation (5G) new radio (NR).
2. The method of claim 1 , wherein the addition request message includes information associated with a type of a bearer and the type of the bearer includes the split bearer associated with the SCG.
3. The method of claim 1 , wherein a QoS requirement for bearers of the primary base station and the secondary base station is guaranteed according to a sum of resources provided by the MCG and secondary cell group (SCG).
4. The method of claim 1 , wherein information broadcasted by the secondary base station supporting the NR includes information on whether the secondary base station is accessible.
5. A method for establishing a split bearer associated with a secondary cell group (SCG) performed by a secondary base station of the SCG supporting a second radio access technology (RAT), the method comprising:
receiving, from a primary base station of a master cell group (MCG) supporting a first RAT, an addition request message for requesting addition of the secondary base station including a first parameter for full quality of service (QOS) and a second parameter associated with guaranteed bit rate (GBR) QOS that is admittable by the MCG; and
transmitting, to the primary base station, an addition response message including a third parameter about QoS to be provided by the MCG,
wherein the third parameter does not exceed the second parameter,
wherein the first RAT is 4th generation (4G) long term evolution (LTE) and the second RAT is 5th generation (5G) new radio (NR).
6. The method of claim 5 , wherein the addition request message includes information associated with a type of a bearer and the type of the bearer includes the split bearer associated with the SCG.
7. The method of claim 5 , wherein a QoS requirement for bearers of the primary base station and the secondary base station is guaranteed according to a sum of resources provided by the MCG and secondary cell group (SCG).
8. The method of claim 5 , further comprising:
broadcasting information including information on whether the secondary base station is accessible.
9. A primary base station of a master cell group (MCG) establishing a split bearer associated with a secondary cell group (SCG) supporting a first radio access technology (RAT) in a wireless communication system, the primary base station comprising:
a transceiver; and
at least one processor coupled to the transceiver and configured to:
transmit, to a secondary base station supporting a second RAT, an addition request message for requesting addition of the secondary base station including a first parameter for full quality of service (QOS) and a second parameter associated with guaranteed bit rate (GBR) QoS that is admittable by the MCG, and
receive, from the secondary base station, an addition response message including a third parameter about QoS to be provided by the MCG,
wherein the third parameter does not exceed the second parameter, and
wherein the first RAT is 4th generation (4G) long term evolution (LTE) and the second RAT is 5th generation (5G) new radio (NR).
10. The primary base station of claim 9 , wherein the addition request message includes information associated with a type of a bearer and the type of the bearer includes the split bearer associated with the SCG.
11. The primary base station of claim 9 , wherein a QoS requirement for bearers of the primary base station and the secondary base station is guaranteed according to a sum of resources provided by the MCG and secondary cell group (SCG).
12. The primary base station of claim 9 , wherein information broadcasted by the secondary base station supporting the NR includes information on whether the secondary base station is accessible.
13. A secondary base station establishing a split bearer associated with a secondary cell group (SCG) supporting a second radio access technology (RAT) in a wireless communication system, the secondary base station comprising:
a transceiver; and
at least one processor coupled to the transceiver and configured to:
receive, from a primary base station of a master cell group (MCG) supporting a first RAT, an addition request message for requesting addition of the secondary base station including a first parameter for full quality of service (QOS), and a second parameter associated with guaranteed bit rate (GBR) that is admittable by the MCG, and
transmit, to the primary base station, an addition response message including a third parameter about QoS to be provided by the MCG,
wherein the third parameter does not exceed the second parameter, and
wherein the first RAT is 4th generation (4G) long term evolution (LTE) and the second RAT is 5th generation (5G) new radio (NR).
14. The secondary base station of claim 13 , wherein the addition request message includes information associated with a type of a bearer and the type of the bearer includes the split bearer associated with the SCG.
15. The secondary base station of claim 13 , wherein a QoS requirement for bearers of the primary base station and the secondary base station is guaranteed according to a sum of the resources provided by the MCG and secondary cell group (SCG).
16. The secondary base station of claim 13 , wherein the at least one processor is further configured to:
broadcast information including information on whether the secondary base station is accessible.