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US-12628039-B2 - Method and device for preventing decompression error in next-generation mobile communication system

US12628039B2US 12628039 B2US12628039 B2US 12628039B2US-12628039-B2

Abstract

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.

Inventors

  • Donggun Kim

Assignees

  • SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date
20260512
Application Date
20221214
Priority Date
20211215

Claims (16)

  1. 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. 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. 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. 4 . The method of claim 1 , wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.
  5. 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. 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. 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. 8 . The method of claim 5 , wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.
  9. 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. 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. 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. 12 . The terminal of claim 9 , wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.
  13. 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. 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. 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. 16 . The base station of claim 13 , wherein the PDCP configuration information does not include an Ethernet header compression (EHC) configuration.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2021-0179566, which was filed in the Korean Intellectual Property Office on Dec. 15, 2021, the entire disclosure of which is incorporated herein by reference. BACKGROUND 1) Field The disclosure relates generally to a method and a device for preventing a data decompression error in a next-generation mobile communication system. 2) Description of Related Art To meet the increasing demand for wireless data traffic since the deployment of fourth generation (4G) communication systems, efforts have been made to develop an improved fifth generation (5G) or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a beyond 4G network communication system or a post LTE” system. The 5G communication system is considered to be implemented in ultrahigh frequency (mmWave) bands (e.g., 60 GHz bands) to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance in the ultrahigh frequency bands, beamforming, massive multiple-input multiple-output (massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam forming, large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation and the like. In the 5G system, hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as an advanced access technology have also been developed. The Internet is also evolving to the Internet of things) where distributed entities, i.e., things, exchange and process information without human intervention. The Internet of everything (IoE), which is a combination of the IoT technology and the big data processing technology through connection with a cloud server, has emerged. As technology elements, such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology have been demanded for IoT implementation, a sensor network, a machine-to-machine (M2M) communication, machine type communication (MTC), etc., have been recently researched. Such an IoT environment may provide intelligent Internet technology (IT) services that create a new value to human life by collecting and analyzing data generated among connected things. IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing information technology and various industrial applications. In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, MTC, and M2M communication may be implemented by beamforming, MIMO, and array antennas. Application of a cloud RAN as the above-described big data processing technology may also be considered an example of convergence of the 5G technology with the IoT technology. In a next-generation mobile communication system, a downlink may secure more transmission resources using a high frequency band and a wide bandwidth. In a base station, more physical antennas may be installed and used, and thus a beamforming gain and a high signal strength may be obtained, so that more data may be loaded onto the same frequency/time resource so as to be transmitted to a terminal via the downlink. However, in a case of an uplink, a terminal has a physically small size, making it difficult to use a high frequency band and a wide bandwidth for an uplink frequency. Thus, a bottleneck may more likely occur in an uplink transmission resource than in a downlink transmission resource. The maximum transmission power of a terminal is much smaller than that of a base station, and therefore there is a problem that coverage becomes smaller during uplink data transmission. Accordingly, it is required to efficiently use transmission resources by compressing uplink data. A method of compressing uplink data or compressing user data (e.g., uplink data compression (UDC)) provides a scheme of successively compressing data, based on previous data. Therefore, if one piece of data in a series of compressed data is lost or discarded, or decompression of the data fails, data decompression fails for all data subs