Search

EP-4740449-A1 - APPARATUS AND METHOD FOR FORWARD ERROR CORRECTION PACKET SCHEDULING IN WIRELESS COMMUNICATION SYSTEM

EP4740449A1EP 4740449 A1EP4740449 A1EP 4740449A1EP-4740449-A1

Abstract

The disclosure relates to a 5G or 6G communication system for supporting higher data rate. A method performed by an SMF in a communication system includes receiving, from a PCF, a PCC rule including a protocol descriptor that indicates support of a PDU set-based FEC, transmitting, to a UPF, packet handling information including detection rule information for distinguishing an FEC source packet and an FEC repair packet in the PDU set-based FEC, and transmitting, to an AMF, a QoS profile including a QoS rule updated based on the PCC rule.

Inventors

  • BAE, Jaehyeon
  • YANG, HYUNKOO

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260513
Application Date
20240809

Claims (15)

  1. A method performed by a session management function (SMF) in a communication system, the method comprising: receiving, from a policy control function (PCF), a policy and charging control (PCC) rule including a protocol descriptor that indicates support of a protocol data unit (PDU) set-based forward error correction (FEC); transmitting, to a user plane function (UPF), packet handling information including detection rule information for distinguishing an FEC source packet and an FEC repair packet in the PDU set-based FEC; and transmitting, to an access and mobility management function (AMF), a quality of service (QoS) profile including a QoS rule updated based on the PCC rule.
  2. The method of claim 1, further comprising: receiving, from the AMF, congestion information about a congestion situation occurring in a radio access network (RAN); and determining a buffering operation for the FEC source packet or the FEC repair packet based on the congestion information.
  3. The method of claim 2, wherein determining the buffering operation is to determine the FEC source packet or the FEC repair packet to which the buffering operation is to be applied based on priority of the FEC source packet and the FEC repair packet.
  4. The method of claim 2, wherein, when the buffering operation is able to be performed in the UPF, a buffering action rule (BAR) is transmitted to the UPF, and wherein, when the buffering operation is unable to be performed in the UPF, the buffering operation is performed on the SMF.
  5. The method of claim 1, wherein one FEC repair packet corresponds to one or more FEC source packet blocks.
  6. A method performed by a user plane function (UPF) in a communication system, the method comprising: receiving, from a session management function (SMF), a packet handling information including detection rule information for distinguishing a forward error correction (FEC) source packet and a FEC repair packet in a protocol data unit (PDU) set; receiving, from an application server (AS), downlink data; and transmitting, to a radio access network (RAN), information about whether a packet included in the downlink data corresponds to any one of the FEC source packet and the FEC repair packet and association information between the FEC source packet and the FEC repair packet by including the information about whether a packet included in the downlink data corresponds to any one of the FEC source packet and the FEC repair packet and the association information between the FEC source packet and the FEC repair packet in a general packet radio service tunneling protocol-user plane (GTP-U) header of each packet.
  7. The method of claim 6, further comprising: receiving, from the SMF, a buffering action rule (BAR) related to determination of buffering of the packet; determining whether to perform a buffering operation for the packets included in downlink data based on the BAR; and performing the buffering operation.
  8. The method of claim 6, wherein the PDU set-based scheduling in the RAN is performed based on FEC source packet information or FEC repair packet information.
  9. A session management function (SMF) operating in a communication system, the SMF comprising: a transceiver; and a controller, wherein the controller is configured to: receive, from a policy control function (PCF), a policy and charging control (PCC) rule including a protocol descriptor that indicates support of a protocol data unit (PDU) set-based forward error correction (FEC), transmit, to a user plane function (UPF), packet handling information including detection rule information that distinguishes FEC source packets and FEC repair packets in the PDU set-based FEC, and transmit, to an access and mobility management function (AMF), a quality of service (QoS) profile including a QoS rule updated based on the PCC rule.
  10. The SMF of claim 9, wherein the controller is further configured to: receive, from the AMF, congestion information about a congestion situation occurring in a radio access network (RAN), and determine a buffering operation for the FEC source packet or the FEC repair packet based on the congestion information.
  11. The SMF of claim 10, wherein the controller is further configured to determine the FEC source packet or the FEC repair packet to which the buffering operation is to be applied based on priority of the FEC source packet and the FEC repair packet.
  12. The SMF of claim 10, wherein the controller is further configured to transmit a buffering action rule to the UPF when the buffering operation is able to be performed in the UPF, and perform the buffering operation on the SMF when the buffering operation is unable to be performed in the UPF.
  13. A user plane function (UPF) operating in a communication system, the UPF comprising: a transceiver; and a controller configured to: receive, from a session management function (SMF), a packet handling information including detection rule information for distinguishing a forward error correction (FEC) source packet and a FEC repair packet in a protocol data unit (PDU) set, receive, from an application server (AS), downlink data, and transmit, to a radio access network (RAN), information about whether a packet included in the downlink data corresponds to any one of the FEC source packet and the FEC repair packet and association information between the FEC source packet and the FEC repair packet by including the information about whether a packet included in the downlink data corresponds to any one of the FEC source packet and the FEC repair packet and the association information between the FEC source packet and the FEC repair packet in a general packet radio service tunneling protocol-user plane (GTP-U) header of each packet.
  14. The UPF of claim 13, wherein the controller is further configured to: receive, from the SMF, a buffering action rule (BAR) related to a buffering determination of the packet, determine whether to perform a buffering operation for the packets included in downlink data based on the BAR, and perform the buffering operation.
  15. The UPF of claim 13, wherein the PDU set-based scheduling in the RAN is performed based on FEC source packet information or FEC repair packet information.

Description

APPARATUS AND METHOD FOR FORWARD ERROR CORRECTION PACKET SCHEDULING IN WIRELESS COMMUNICATION SYSTEM The disclosure relates generally to the field of wireless communications, and more particularly, to a method and apparatus for creating information for processing protocol data units (PDUs) having the same characteristics as a set in which forward error correction (FEC) source and parity or repair packets are transmitted in a communication system using an FEC scheme. Fifth generation (5G) mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible and can be implemented not only in sub 6 gigahertz (GHz) bands such as 3.5GHz, but also in above 6GHz bands referred to as millimeter wave (mmWave) bands including 28GHz and 39GHz bands. In addition, it has been considered to implement 6G mobile communication technologies referred to as beyond 5G systems in terahertz (THz) bands, such as 95GHz to 3THz bands, to realize transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies. Since the beginning of the development of 5G mobile communication technologies, to support services and to satisfy performance requirements in connection with enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine-type communications (mMTC), there has been ongoing standardization regarding beamforming and massive multiple input multiple output (MIMO) for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, operating multiple subcarrier spacings for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of bandwidth part (BWP), new channel coding methods such as a low density parity check (LDPC) code for a large amount of data transmission and a polar code for highly reliable transmission of control information, layer 2 (L2) pre-processing, and network slicing for providing a dedicated network specialized to a specific service. There are also ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as vehicle-to-everything (V2X) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, new radio unlicensed (NR-U) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR user equipment (UE) power saving, non-terrestrial network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning. There is also ongoing standardization in air interface architecture/protocol regarding technologies such as industrial Internet of things (IIoT) for supporting new services through interworking and convergence with other industries, integrated access and backhaul (IAB) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and dual active protocol stack (DAPS) handover, and two-step random access channel (2-step RACH) for simplifying NR random access procedures. There also has been ongoing standardization in system architecture/service regarding a 5G baseline architecture, such as a service based architecture or service based interface, for combining network functions virtualization (NFV) and software-defined networking (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE positions. As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with extended reality (XR) for efficiently supporting augmented reality (AR), virtual reality (VR), mixed reality (MR) and the like, 5G performance improvement and complexity reduction by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication. Such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in THz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as full dimensional MIMO (