Method and apparatus for processing packet in next-generation mobile communication system
The present disclosure relates to a communication method and system for converging a 5 th -Generation (5G) communication system for supporting higher data rates beyond a 4 th -Generation (4G) system with a technology for Internet of Things (IoT). The present 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. A method of a terminal includes receiving packet duplication data radio bearer (DRB) configuration information from a base station, receiving a medium access control (MAC) control element (CE) including information indicating whether packet duplication has been activated from the base station, and determining whether to activate a packet duplication bearer based on the packet duplication DRB configuration information and the MAC CE.
1. A method by a terminal, the method comprising:
receiving a counter check request message including a data radio bearer (DRB) count most significant bit (MSB) information list from a base station;
identifying a first DRB and a second DRB being included in the DRB count MSB information list;
in case that the first DRB is included in the DRB count MSB information list, identifying whether a most significant bit (MSB) value of the terminal for the first DRB is different from a MSB value of the base station for the first DRB indicated by the DRB count MSB information list; and
transmitting a counter check response message to the base station,
wherein the counter check response message includes first DRB count information associated with the first DRB in case that the MSB value of the terminal for the first DRB being different from the MSB value of the base station for the first DRB,
wherein the counter check response message includes second DRB count information for the second DRB of a cell group of the terminal in case that the second DRB is not included in the DRB count MSB information list, and
wherein the MSB value of the terminal for the first DRB is determined based on a count value of a packet data convergence protocol (PDCP) service data unit (SDU) to be received minus one.
2. The method of claim 1 , wherein the counter check response message includes a DRB identity of the first DRB and full count values for uplink PDCP SDU and downlink PDCP SDU associated with the MSB value of the terminal for the first DRB.
3. The method of claim 1 , further comprising:
identifying whether the counter check request message is received through a signaling radio bearer (SRB) 1 ,
wherein the counter check response message includes DRB count information associated with a master cell group (MCG) bearer but not includes DRB count information associated with a secondary cell group (SCG) bearer based on the counter check request message being received through the SRB 1 .
4. The method of claim 3 , wherein the counter check response message includes DRB count information associated with the SCG bearer but not includes DRB count information associated with the MCG bearer based on the counter check request message being received through an SRB different from the SRB 1 .
5. The method of claim 1 , wherein the counter check response message does not include the first DRB count information associated with the first DRB in case that the MSB value of the terminal is identical with the MSB value of the base station.
6. A method performed by a base station, the method comprising:
transmitting a counter check request message including a data radio bearer (DRB) count most significant bit (MSB) information list to a terminal; and
receiving a counter check response message from the terminal,
wherein whether a most significant bit (MSB) value of the terminal for a first DRB is different from a MSB value of the base station for the first DRB indicated by the DRB count MSB information list is identified by the terminal in case that the first DRB is included in the DRB count MSB information list,
wherein the counter check response message includes first DRB count information associated with the first DRB in case that the MSB value of the terminal for the first DRB being different from the MSB value of the base station for the first DRB,
wherein the counter check response message includes second DRB count information for a second DRB of a cell group of the terminal in case that the second DRB is not included in the DRB count MSB information list, and
wherein the MSB value of the terminal for the first DRB is determined based on a count value of a packet data convergence protocol (PDCP) service data unit (SDU) to be received minus one.
7. The method of claim 6 , wherein the counter check response message includes a DRB identity of the first DRB and full count values for uplink PDCP SDU and downlink PDCP SDU associated with the MSB value of the terminal for the first DRB.
8. The method of claim 6 , wherein the counter check response message includes DRB count information associated with a master cell group (MCG) bearer but not includes DRB count information associated with a secondary cell group (SCG) bearer based on the counter check request message being transmitted through a signaling radio bearer (SRB) 1 .
9. The method of claim 8 , wherein the counter check response message includes DRB count information associated with the SCG bearer but not includes DRB count information associated with the MCG bearer based on the counter check request message being transmitted through an SRB different from the SRB 1 .
10. The method of claim 6 , wherein the counter check response message does not include the first DRB count information associated with the first DRB in case that the MSB value of the terminal is identical with the MSB value of the base station.
11. A terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station via the transceiver, a counter check request message including a data radio bearer (DRB) count most significant bit (MSB) information list,
identify a first DRB and a second DRB being included in the DRB count MSB information list,
in case that the first DRB is included in the DRB count MSB information list, identify whether a most significant bit (MSB) value of the terminal for a first DRB is different from a MSB value of the base station for the first DRB indicated by the DRB count MSB information list, and
transmit, to the base station via the transceiver, a counter check response message,
wherein the counter check response message includes first DRB count information associated with the first DRB in case that the MSB value of the terminal for the first DRB being different from the MSB value of the base station for the first DRB,
wherein the counter check response message includes second DRB count information for the second DRB of a cell group of the terminal in case that the second DRB is not included in the DRB count MSB information list, and
wherein the MSB value of the terminal for the first DRB is determined based on a count value of a packet data convergence protocol (PDCP) service data unit (SDU) to be received minus one.
12. The terminal of claim 11 , wherein the counter check response message includes a DRB identity of the first DRB and full count values for uplink PDCP SDU and downlink PDCP SDU associated with the MSB value of the terminal for the first DRB.
13. The terminal of claim 11 , wherein the controller is further configured to identify whether the counter check request message is received through a signaling radio bearer (SRB) 1 ,
wherein the counter check response message includes DRB count information associated with a master cell group (MCG) bearer but not includes DRB count information associated with a secondary cell group (SCG) bearer based on the counter check request message being received through the SRB 1 .
14. The terminal of claim 13 , wherein the counter check response message includes DRB count information associated with the SCG bearer but not includes DRB count information associated with the MCG bearer based on the counter check request message being received through an SRB different from the SRB 1 .
15. The terminal of claim 11 , wherein the counter check response message does not include the first DRB count information associated with the first DRB in case that the MSB value of the terminal is identical with the MSB value of the base station.
16. A base station comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal via the transceiver, a counter check request message including a data radio bearer (DRB) count most significant bit (MSB) information list, and
receive, from the terminal via the transceiver, a counter check response message,
wherein whether a most significant bit (MSB) value of the terminal for a first DRB is different from a MSB value of the base station for the first DRB indicated by the DRB count MSB information list is identified by the terminal in case that the first DRB is included in the DRB count MSB information list,
wherein the counter check response message includes first DRB count information associated with the first DRB in case that the MSB value of the terminal for the first DRB being different from the MSB value of the base station for the first DRB,
wherein the counter check response message includes second DRB count information for a second DRB of a cell group of the terminal in case that the second DRB is not included in the DRB count MSB information list, and
wherein the MSB value of the terminal for the first DRB is determined based on a count value of a packet data convergence protocol (PDCP) service data unit (SDU) to be received minus one.
17. The base station of claim 16 , wherein the counter check response message includes a DRB identity of the first DRB and full count values for uplink PDCP SDU and downlink PDCP SDU associated with the MSB value of the terminal for the first DRB.
18. The base station of claim 16 ,
wherein the counter check response message includes DRB count information associated with a master cell group (MCG) bearer but not includes DRB count information associated with a secondary cell group (SCG) bearer based on the counter check request message being transmitted through a signaling radio bearer (SRB) 1 .
19. The base station of claim 18 , wherein the counter check response message includes DRB count information associated with the SCG bearer but not includes DRB count information associated with the MCG bearer based on the counter check request message being transmitted through an SRB different from the SRB 1 .
20. The base station of claim 16 , wherein the counter check response message does not include the first DRB count information associated with the first DRB in case that the MSB value of the terminal is identical with the MSB value of the base station.