Electronics and Telecommunications Research Institute

Taesik Cheung

Jeong-dong Ryoo

Yeoncheol Ryoo

Yoo Hwa Kang

Changki Kim

Namseok Ko

Do Young Kim

Sun Me Kim

Tae Kyu Kang

Chang-Ho Choi

Bin Yeong Yoon

Jeong Yun Kim

Daeub Kim

Kyung Gyu Chun

Eung Ha Kim

A segment routing-based MPLS packet forwarding method and a device thereof are proposed. The method includes establishing a forwarding path in a Multiple Protocol Label Switching (MPLS) network by receiving a packet, checking whether processing of a size of a label stack related to each node included in the forwarding path is available or not in each node, generating a first MPLS packet by adding an MPLS header having the label stack to the packet in response to availability of the processing, and generating a second MPLS packet by adding an extension header having the label stack and by adding an MPLS header having a part of the label stack allocated according to the label stack size processable by each node to the packet in response to unavailability of the processing.

Segment routing-based MPLS packet forwarding method and device thereof

An apparatus and method for guaranteeing deterministic latency in a communication system is proposed. The method of operating enqueue packet processing may include extracting cycle information of a received packet from the received packet, identifying at least one of enq_myQ, enq_mateQ, and enq_mateQ_hold states of a queuing state parameter of an enqueue process for a previous packet for each flow at a reception node, identifying whether a cycle parameter for performing a CQF operation for the previous packet for each flow in the reception node is the same as a cycle parameter for performing the current CQF operation, identifying whether a cycle parameter included in the previously received packet for each flow in the reception node is the same as a cycle parameter included in a currently received packet, and storing (enqueuing) the received packet on the basis of the identifying processes and storing information about the received packet.

Apparatus and method for guaranteeing deterministic latency in communication system

A method and apparatus for processing DetNet traffic through the steps of receiving configuration information for configuring a DetNet node from a DetNet controller of a DetNet system and configuring a UPF, a DS-TT, and/or a NW-TT in a mobile communication system as the DetNet node are provided.

Method and apparatus for processing DetNet traffic

Provided is an apparatus and method for a centralized ultra-precision network control framework controlling heterogeneous multiple network domains to provide a large-scale end-to-end ultra-precision service in a communication system. A method of operating a network domain controller in a communication system includes: receiving node information, link information, adjacent node information, and adjacent node link information from a network node control agent; identifying controller topology information based on the node information, the link information, the adjacent node information, and the adjacent node link information; and transmitting boundary node information, boundary node link information, adjacent domain node information, and adjacent domain node link information to a network orchestrator.

Apparatus and method for centralized ultra-precision network control framework controlling heterogeneous multiple network domains in communication system

An autonomous quality of service provisioning apparatus and method are disclosed. The apparatus includes a parameter extraction unit receiving a packet transmitted from a transmitting terminal and extracting QoS parameters by analyzing the received packet; and a quality of service reservation unit configured to be associated with a controller that manages and controls resources of the network to request the controller to reserve resources corresponding to the extracted QoS parameters.

Autonomous quality of service provisioning apparatus and method

Method and apparatus for processing DETNET traffic

A method in which a high-quality packet telephony terminal apparatus performing low-latency and lossless packet communication with a counterpart packet telephony terminal apparatus operates in an integrated network structure in which a time sensitive network (TSN) and a packet communication network are combined may be disclosed. The packet telephony terminal apparatus may perform packet telephony call processing, perform a TSN stream reservation procedure when the counterpart packet telephony terminal apparatus is capable of performing a TSN function for lossless packet communication, adjust a size of a dejitter buffer when the TSN stream reservation procedure is successful, and perform low-latency packet telephony communication through the minimized size of the dejitter buffer.

Packet telephony terminal apparatus and operating method thereof

In the apparatus for controlling a transmission for lossless packet forwarding, when a failure is detected on one of a plurality of forwarding paths set between a transmitting node and a receiving node, packet transmission of a flow associated with the path in which the failure occurs is stopped, when the path in which the failure occurs is recovered, packet transmission of the flow is resumed, and the receiving node temporarily extends the bandwidth of the flow.

Method and apparatus for controlling transmission for lossless packet forwarding

A 5G system operating as a Time Sensitive Network (TSN) bridge and a traffic transmission method are provided. The traffic transmission method includes receiving, by a User Plane Function (UPF), a traffic transmission type information from a Session Management Function (SMF); determining, by the UPF, whether a Time Sensitive Communication (TSC) traffic incoming the TSN bridge is a UE-UE TSC traffic based on the traffic transmission type information; and when it is determined that the TSC traffic incoming the TSN bridge is the UE-UE TSC traffic, performing, by the UPF, local switching between Protocol Data Unit (PDU) sessions for transmitting UE-UE TSC traffic.

5G system operating as TSN bridge and traffic transmission method

Provided are a method for performing port configuration of a 5G system (5GS) for providing a time synchronization service, and a network entity performing the same. A method for performing port configuration may include: when a grandmaster (GM) is determined to be a Time Sensitive Networking (TSN) GM outside the 5GS, performing, by a Network Exposure Function (NEF), port configuration of the 5GS in a Best Master Clock Algorithm (BMCA) scheme; and when the GM is determined to be a 5GS GM inside the 5GS, or the TSN GM outside the 5GS that does not support the BMCA, performing, by the NEF, port configuration of the 5GS in an external port configuration scheme.

Method for performing port configuration of 5G system for providing time synchronization service and network entity performing the same

Disclosed are methods lossless traffic forwarding using distributed delay offset matching. The lossless traffic forwarding method includes calculating a delay offset between a first forwarding path between a transmitting node and a receiving node and a second forwarding path between the transmitting node and the receiving node, and controlling a buffer resource by an extent of the delay offset to delay packets to be forwarded on the first forwarding path.

Methods of lossless traffic forwarding using distributed delay offset matching

A linear protection switching-based domain connecting method includes determining, by a protection interconnecting node, a user traffic transceiving path based on information on a presence or absence of defect in working paths and protection paths, generating working path control information and protection path control information based on information on the determined user traffic transceiving path and the information on the presence or absence of the defect in the protection paths, and transmitting the generated working path information to the working interconnecting node, and connecting two paths among the protection paths, and the connection path based on the protection path control information.

Apparatus and method for interconnecting multiple linear protection domains

In a network in which a plurality of protection paths have been formed for one working path between a first node and a second node, each node determines preference levels corresponding to an order to be preferentially used when performing protection switching on the plurality of protection paths. Next, each node exchanges pieces of information about the preference levels determined for the plurality of protection paths.

Protection switching method and apparatus

A method of performing protection switching in a network including a first node and a plurality of second nodes that are connected to the first node is provided. The first node counts the number of obstacles that have occurred in a plurality of paths that are connected between the plurality of second nodes, and if the counted number is smaller than a predetermined threshold value, the first node performs protection switching per leaf. Alternatively, if the counted number is equal to or larger than a predetermined threshold value, the first node performs protection switching per tree.

Method and apparatus for protection switching in point-to-multipoint network

A protection switching unit and a method of performing protection switching of the protection switching unit are provided. The method includes steps of detecting a fault that has occurred at a working path of a network; opening a first switch that is connected to the working path and closing a second switch that is connected to the protection path of the network; and maintaining a connection state of the first switch and the working path and a connection state of the second switch and the protection path, when a fault that has occurred at the working path is restored.

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Daejeon, South Korea

Taesik Cheung