Method and device for preventing decompression error in next-generation mobile communication system
The disclosure relates to a communication technique for converging Internet of things technology with 5G communication systems designed to support a higher data transfer rate beyond 4G systems, and a system therefor. The disclosure may be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. The disclosure provides a method and a device for preventing a data decompression error in a next-generation mobile communication system.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a radio resource control (RRC) message including packet data convergence protocol (PDCP) configuration information;
in case that an uplink data compression (UDC) configuration is included in the PDCP configuration information, generating uplink data using a UDC protocol based on the UDC configuration; and
transmitting, to the base station, the uplink data,
wherein a PDCP entity of the terminal is a new radio (NR) PDCP, and
wherein, in case that the RRC message is an RRC reconfiguration message to perform reconfiguration with sync and a PDCP re-establishment is indicated by the RRC reconfiguration message, the method further comprises:
identifying whether an indicator is configured based on the UDC configuration, wherein the indicator indicates whether the UDC configuration is continued;
in case that the indicator is configured, continuing to use the UDC protocol during the PDCP re-establishment, and
in case that the indicator is not configured, resetting a UDC buffer to zero and filling the UDC buffer based on a configured dictionary.
2 . The method of claim 1 ,
wherein the UDC configuration is included in the PDCP configuration information, in case that a radio link control (RLC) entity of a data radio bearer (DRB) associated with the NR PDCP is set to an acknowledged mode (AM) and an out-of-order delivery is not configured for the DRB.
3 . The method of claim 1 ,
wherein, in case that the DRB is configured as a split bearer, each RLC entity associated with the NR PDCP is set to the AM.
4 . The method of claim 1 ,
wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.
5 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a radio resource control (RRC) message including packet data convergence protocol (PDCP) configuration information, the PDCP configuration information including an uplink data compression (UDC) configuration; and
receiving, from the terminal, uplink data based on the UDC configuration,
wherein a PDCP entity of the terminal is a new radio (NR) PDCP,
wherein the RRC message is an RRC reconfiguration message to perform reconfiguration with sync and indicates a PDCP re-establishment,
wherein, in case that an indicator is configured by the UDC configuration, a UDC protocol used for generating the uplink data is continued to be used during the PDCP re-establishment, the indicator indicating whether the UDC configuration is continued, and
wherein, in case that the indicator is not configured by the UDC configuration, a UDC buffer is reset to zero and filled based on a configured dictionary.
6 . The method of claim 5 ,
wherein the UDC configuration is included in the PDCP configuration information, in case that a radio link control (RLC) entity of a data radio bearer (DRB) associated with the NR PDCP set to an acknowledged mode (AM) and an out-of-order delivery is not configured for the DRB.
7 . The method of claim 6 ,
wherein, in case that the DRB is configured as a split bearer, each RLC entity associated with the NR PDCP is set to the AM.
8 . The method of claim 5 ,
wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.
9 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
control the transceiver to receive, from a base station, a radio resource control (RRC) message including packet data convergence protocol (PDCP) configuration information;
in case that an uplink data compression (UDC) configuration is included in the PDCP configuration information, generate uplink data using a UDC protocol based on the UDC configuration; and
control the transceiver to transmit, to the base station, the uplink data,
wherein a PDCP entity of the terminal is a new radio (NR) PDCP, and
wherein, in case that the RRC message is an RRC reconfiguration message to perform reconfiguration with sync and a PDCP re-establishment is indicated by the RRC reconfiguration message, the controller is further configured to:
identify whether an indicator is configured based on the UDC configuration, wherein the indicator indicates whether the UDC configuration is continued;
in case that the indicator is configured, continue to use the UDC protocol during the PDCP re-establishment, and
in case that the indicator is not configured, reset a UDC buffer to zero and fill the UDC buffer based on a configured dictionary.
10 . The terminal of claim 9 ,
wherein the UDC configuration is included in the PDCP configuration information, in case that a radio link control (RLC) entity of a data radio bearer (DRB) associated with the NR PDCP is set to an acknowledged mode (AM) and an out-of-order delivery is not configured for the DRB.
11 . The terminal of claim 10 ,
wherein, in case that the DRB is configured as a split bearer, each RLC entity associated with the NR PDCP is set to the AM.
12 . The terminal of claim 9 ,
wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.
13 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
control the transceiver to transmit, to a terminal, a radio resource control (RRC) message including packet data convergence protocol (PDCP) configuration information, the PDCP configuration information including an uplink data compression (UDC) configuration, and
control the transceiver to receive, from the terminal, uplink data based on the UDC configuration,
wherein a PDCP entity of the terminal is a new radio (NR) PDCP,
wherein the RRC message is an RRC reconfiguration message to perform reconfiguration with sync and indicates a PDCP re-establishment,
wherein, in case that an indicator is configured by the UDC configuration, a UDC protocol used for generating the uplink data is continued to be used in the terminal during the PDCP re-establishment, the indicator indicating whether the UDC configuration is continued, and
wherein, in case that the indicator is not configured by the UDC configuration, a UDC buffer is reset to zero and filled based on a configured dictionary.
14 . The base station of claim 13 ,
wherein the UDC configuration is included in the PDCP configuration, in case that a radio link control (RLC) entity of a data radio bearer (DRB) associated with the NR PDCP set to an acknowledged mode (AM) and an out-of-order delivery is not configured for the DRB.
15 . The base station of claim 14 ,
wherein, in case that the DRB is configured as a split bearer, each RLC entity associated with the NR PDCP is set to the AM.
16 . The base station of claim 13 ,
wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.