US-12628043-B2 - Method and apparatus for scheduling packet transmission based on access network packet delay budget

US12628043B2US 12628043 B2US12628043 B2US 12628043B2US-12628043-B2

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a base station in a communication system is provided. The method includes receiving a packet including metadata from a user plane function (UPF), identifying a packet delay budget (PDB) for a quality of service (QoS) flow of the packet, identifying a delay time of the packet based on the metadata, determining an access network (AN) PDB based on the PDB and the delay time, and performing scheduling for transmission of the packet to a terminal based on the AN PDB.

Inventors

Sunhyun KIM
Dongmyung KIM
Younggyoun MOON
Jungsoo JUNG
Sunwoo CHO
Jiyoung CHA
Jinho Choi

Assignees

SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220711
Priority Date: 20220510

Claims (10)

1 . A method performed by a base station in a communication system, the method comprising: receiving a packet including packet delay metadata from a user plane function (UPF); identifying a packet delay budget (PDB) for a quality of service (QOS) flow of the packet; identifying a delay time of the packet based on the packet delay metadata; determining an access network (AN) PDB based on the PDB and the delay time; and performing scheduling for transmission of the packet to a terminal based on the AN PDB, wherein a header of the packet includes an instruction field and a one-bit field indicating whether a type of the packet delay metadata to be inserted into the header of the packet has been changed, wherein in case that the one-bit field is set to 1, the instruction field indicates the type of the packet delay metadata to be inserted into the header of the packet, and wherein in case that the one-bit field is set to 0, the instruction field is padded with zeros.
2 . The method of claim 1 , further comprising: identifying whether the packet delay metadata includes information related to a data network packet delay (DN PD), wherein the packet delay metadata includes information related to a core network packet delay (CN PD), wherein, in case that the packet delay metadata includes the information related to the DN PD, the delay time is determined based on the PDB, the DN PD, and the CN PD, and wherein, in case that the packet delay metadata does not include the information related to the DN PD, the delay time is determined based on the PDB and the CN PD.
3 . The method of claim 2 , further comprising: identifying a CN PD budget (PDB) corresponding to the PDB; identifying whether the CN PD exceeds the CN PDB; and transmitting a telemetry rate control message to a network device performing a control plane network function, wherein, in case that the CN PD exceeds the CN PDB, information for requesting an increase in a telemetry frequency is included in the telemetry rate control message, and wherein, in case that the CN PD is equal to or less than the CN PDB, information for requesting a decrease in the telemetry frequency is included in the telemetry rate control message.
4 . The method of claim 1 , wherein the header of the packet is a transmission control protocol/user datagram protocol (TCP/UDP) header.
5 . The method of claim 2 , wherein, in case that the packet delay metadata includes the information related to the DN PD, the PDB corresponds to an end-to-end PDB, and wherein, in case that the packet delay metadata does not include the information related to the DN PD, the PDB corresponds to an upper limit of a delay time between the terminal and the UPF.
6 . A base station in a communication system, the base station comprising: a transceiver; and at least one processor coupled with the transceiver and configured to: receive a packet including packet delay metadata from a user plane function (UPF), identify a packet delay budget (PDB) for a quality of service (QOS) flow of the packet, identify a delay time of the packet based on the packet delay metadata, determine an access network (AN) PDB based on the PDB and the delay time, and perform scheduling for transmission of the packet to a terminal based on the AN PDB wherein a header of the packet includes an instruction field and a one-bit field indicating whether a type of the packet delay metadata to be inserted into the header of the packet has been changed, wherein in case that the one-bit field is set to 1, the instruction field indicates the type of the packet delay metadata to be inserted into the header of the packet, and wherein in case that the one-bit field is set to 0, the instruction field is padded with zeros.
7 . The base station of claim 6 , wherein the processor is further configured to identify whether the packet delay metadata includes information related to a data network packet delay (DN PD), wherein the packet delay metadata includes information related to a core network packet delay (CN PD), wherein, in case that the packet delay metadata includes the information related to the DN PD, the delay time is determined based on the PDB, the DN PD, and the CN PD, and wherein, in case that the packet delay metadata does not include the information related to the DN PD, the delay time is determined based on the PDB and the CN PD.
8 . The base station of claim 7 , wherein the processor is further configured to: identify a CN PD budget (PDB) corresponding to the PDB, identify whether the CN PD exceeds the CN PDB, and transmit a telemetry rate control message to a network device performing a control plane network function, wherein, in case that the CN PD exceeds the CN PDB, information for requesting an increase in a telemetry frequency is included in the telemetry rate control message, and wherein, in case that the CN PD is equal to or less than the CN PDB, information for requesting a decrease in the telemetry frequency is included in the telemetry rate control message.
9 . The base station of claim 6 , wherein the header of the packet is a transmission control protocol/user datagram protocol (TCP/UDP) header.
10 . The base station of claim 7 , wherein, in case that the packet delay metadata includes the information related to the DN PD, the PDB corresponds to an end-to-end PDB, and wherein, in case that the packet delay metadata does not include the information related to the DN PD, the PDB corresponds to an upper limit of a delay time between the terminal and the UPF.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is based on and claims priority under 35 U.S.C. § 119(a) of a Korean patent application number 10-2022-0057381, filed on May 10, 2022, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. BACKGROUND 1. Field The disclosure relates to a communication system. More particularly, the disclosure relates to a method and an apparatus for improving the quality of service (QoS). 2. Description of Related Art 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 GHz” bands such as 3.5 GHz, but also in “Above 6 GHz” bands referred to as mmWave including 28 GHz and 39 GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz bands (for example, 95 GHz to 3 THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies. At the beginning of the development of 5G mobile communication technologies, in order 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 MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, 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 BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service. Currently, there are 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 V2X (Vehicle-to-everything) 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, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR 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. Moreover, there has been 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, IAB (Integrated Access and Backhaul) 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 DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture/service regarding a 5G baseline architecture (for example, 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 AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) 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. Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission techn