METHOD AND APPARATUS FOR REDUCING OVERHEAD OF ETHERNET FRAME IN NEXT GENERATION MOBILE COMMUNICATION SYSTEM

• US 20200137820A1
• Filed: 10/30/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Donggun
• Granted Patent: US 11,665,766 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/36 for reassigning the resources associated with the released connections
• CPC Class Codes: H04W 80/02 Data link layer protocols
• CPC Class Codes: H04W 80/08 Upper layer protocols network arrangements or communication protocols for networked applications H04L67/00

Abstract

The 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 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 reducing overhead of an Ethernet frame, a method and apparatus for efficiently performing a connection resume procedure of a terminal, and a method and apparatus for preventing a loss of data when performing an uplink user data compression procedure.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising:

receiving, from a base station, a control message for resuming a radio resource control (RRC) connection, the control message including information requesting a re-establishment of a packet data convergence protocol (PDCP) entity;

identifying whether at least one PDCP service data unit (SDU) associated with a PDCP sequence number (SN) is stored, based on the information;

identifying, when the at least one PDCP SDU is stored, a first PDCP SDU from the at least one PDCP SDU, wherein a successful delivery of a corresponding PDCP protocol data unit (PDU) from a lower layer has not been confirmed for the first PDCP SDU;

associating, from the first PDCP SDU, a count value to the at least one PDCP SDU; and

transmitting, to the base station, the at least one PDCP SDU.

2. The method of claim 1, wherein the transmitting further comprises transmitting the at least one PDCP SDU from the first PDCP SDU in an ascending order of the count value, and

wherein the count value for the first PDCP SDU is set to an initial value before receipt of the control message.

3. The method of claim 2, wherein the at least one PDCP SDU is transmitted without restarting a discard timer for the at least one PDCP SDU.

4. The method of claim 2, wherein the first PDCP SDU is a PDCP SDU with a lowest count value or a lowest PDCP SN.

5. The method of claim 1, wherein the identifying of the first PDCP SDU is performed for a suspended acknowledged mode (AM) data radio bearer (DRB).

6. A method performed by a base station in a wireless communication system, the method comprising:

transmitting, to a terminal, a control message for resuming a radio resource control (RRC) connection, the control message including information requesting a re-establishment of a packet data convergence protocol (PDCP) entity; and

receiving, from the terminal, at least one PDCP service data unit (SDU),

wherein whether the at least one PDCP SDU associated with a PDCP sequence number (SN) is stored is identified by the terminal based on the information,

wherein, when the at least one PDCP SDU is stored, a first PDCP SDU from the at least one PDCP SDU is identified, a successful delivery of a corresponding PDCP protocol data unit (PDU) from a lower layer has not been confirmed for the first PDCP SDU, and

wherein a count value is associated to the at least one PDCP SDU, from the first PDCP SDU.

7. The method of claim 6, wherein the receiving further comprises receiving the at least one PDCP SDU from the first PDCP SDU in an ascending order of the count value, and

wherein the count value for the first PDCP SDU is set to an initial value before transmission of the control message.

8. The method of claim 7, wherein the at least one PDCP SDU is received without restarting a discard timer for the at least one PDCP SDU.

9. The method of claim 7, wherein the first PDCP SDU is a PDCP SDU with a lowest count value or a lowest PDCP SN.

10. The method of claim 6, wherein the first PDCP SDU is identified for a suspended acknowledged mode (AM) data radio bearer (DRB).

11. A terminal in a wireless communication system, the terminal comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to;

receive, from a base station, a control message for resuming a radio resource control (RRC) connection, the control message including information requesting a re-establishment of a packet data convergence protocol (PDCP) entity,

identify whether at least one PDCP service data unit (SDU) associated with a PDCP sequence number (SN) is stored, based on the information,

identify, when the at least one PDCP SDU is stored, a first PDCP SDU from the at least one PDCP SDU, wherein a successful delivery of a corresponding PDCP protocol data unit (PDU) from a lower layer has not been confirmed for the first PDCP SDU,

associate, from the first PDCP SDU, a count value to the at least one PDCP SDU, and

transmit, to the base station, the at least one PDCP SDU.

12. The terminal of claim 11, wherein the controller is further configured to transmit the at least one PDCP SDU from the first PDCP SDU in an ascending order of the count value, and

wherein the count value for the first PDCP SDU is set to an initial value before receipt of the control message.

13. The terminal of claim 12, wherein the at least one PDCP SDU is transmitted without restarting a discard timer for the at least one PDCP SDU.

14. The terminal of claim 12, wherein the first PDCP SDU is a PDCP SDU with a lowest count value or a lowest PDCP SN.

15. The terminal of claim 11, wherein the controller is further configured to identify the first PDCP SDU for a suspended acknowledged mode (AM) data radio bearer (DRB).

16. A base station in a wireless communication system, the base station comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to;

transmit, to a terminal, a control message for resuming a radio resource control (RRC) connection, the control message including information requesting a re-establishment of a packet data convergence protocol (PDCP) entity, and

receive, from the terminal, at least one PDCP service data unit (SDU),

wherein whether the at least one PDCP SDU associated with a PDCP sequence number (SN) is stored is identified by the terminal based on the information,

wherein, when the at least one PDCP SDU is stored, a first PDCP SDU from the at least one PDCP SDU is identified, a successful delivery of a corresponding PDCP protocol data unit (PDU) from a lower layer has not been confirmed for the first PDCP SDU, and

wherein a count value is associated to the at least one PDCP SDU, from the first PDCP SDU.

17. The base station of claim 16, wherein the controller is further configured to receive the at least one PDCP SDU from the first PDCP SDU in an ascending order of the count value, and

wherein the count value for the first PDCP SDU is set to an initial value before transmission of the control message.

18. The base station of claim 17, wherein the at least one PDCP SDU is received without restarting a discard timer for the at least one PDCP SDU.

19. The base station of claim 17, wherein the first PDCP SDU is a PDCP SDU with a lowest count value or a lowest PDCP SN.

20. The base station of claim 16, wherein the first PDCP SDU is identified for a suspended acknowledged mode (AM) data radio bearer (DRB).