Abstract: A secondary routing device is configured as a backup routing device for a primary routing device. The primary routing device performs asynchronous socket replication with the secondary routing device. The secondary routing device includes a transmission buffer, in memory, for storing replicated socket data transmitted between the primary routing device and the standby routing device and one or more processors implemented in circuitry and configured to execute a replication driver to: determine a threshold value; determine that an amount of data equaling or exceeding the threshold value has been read from the transmission buffer; in response to determining that the amount of data equaling or exceeding the threshold value has been read from the transmission buffer, schedule a window update for the transmission buffer at a scheduled time; and send the window update at the scheduled time.

Abstract: Certain aspects of the present disclosure provide techniques for autonomous beamforming configuration change. A method that may be performed by a wireless node includes determining a communication mode to be used for communication by the wireless node, wherein the determining of the communication mode includes determining whether the communication is associated with multiple simultaneous communications with one or multiple other wireless nodes. The method may also include determining a beamforming configuration to be used for the communication based on the communication mode, and communicating in accordance with the communication mode using the beamforming configuration.

Abstract: A computer-implemented method and device for analyzing network packet traffic flow affected by a network security device in a communication network. Received in a network monitoring device is packet traffic flow data from a network security device that filters network traffic based upon prescribed security filter settings. The network monitoring device analyzes the received packet traffic flow data by correlating the received traffic flow data with the security filter settings prescribed in the network security device. Certain statistics are identified regarding the network traffic flow affected by the security filter settings of the network security device based upon the correlating of the received traffic flow data with the security filter settings prescribed in the network security device. A report regarding the identified statistics is preferably sent to a network administrator.

Abstract: Systems and methods for providing Chronos Channel interconnects in an ASIC are provided. Chronos Channels rely on a reduced set of timing assumptions and are robust against delay variations. Chronos Channels transmit data using delay insensitive (DI) codes and quasi-delay-insensitive (QDI) logic. Chronos Channels are insensitive to all wire and gate delay variations, but for those belonging to a few specific forking logic paths called isochronic forks. Chronos Channels use temporal compression in internal paths to reduce the overheads of QDI logic and efficiently transmit data. Chronos Channels are defined by a combination of a DI code, a temporal compression ratio and hardware.

Abstract: Embodiments of the invention include a vehicle telematics device that performs vehicle CAN bus discovery using bit timing analysis. In an embodiment, the vehicle telematics device enters a vehicle CAN bus protocol discovery mode, samples a vehicle CAN bus signal, performs bit timing analysis of the CAN bus signal, calculates a BAUD rate of the vehicle CAN bus based on the bit timing analysis, determines a data packet format of data packets on the vehicle CAN bus, and identifies a vehicle CAN bus protocol from a plurality of vehicle CAN bus protocols based on the calculated BAUD rate and data packet format.

Abstract: SeNBs generate first identification information for specifying wireless access networks on the basis of system information provided in a notification from a relay communication device, wirelessly transmit the first identification information to UE, and notifiy an MeNB of second identification information for specifying wireless resources, utilization of which is permitted, via the relay communication device. The MeNB sets, in a signal directed to an SeNB selected from the SeNBs in the first identification information received from the UE, the first identification information of the SeNB, sets the second identification information of the selected SeNB in the signal directed to the UE, and transmits the signal to the relay communication device. The relay communication device transfers the signal received from the master base station to the SeNB in accordance with the first identification or the second identification information set in the signal.

Abstract: Method and computing device for inferring an optimal wireless data transfer rate using a neural network. The method comprises storing a predictive model generated by a neural network training engine in a memory of a computing device. The method comprises determining, by a processing unit of the computing device, parameters of a data transfer through a wireless communication interface of the computing device. The method comprises executing, by the processing unit, a neural network inference engine using the predictive model for inferring an optimal data transfer rate based on the parameters of the data transfer through the wireless communication interface. The method comprises configuring the wireless communication interface to operate at the optimal data transfer rate. For example, the computing device consists of an environment control device (ECD). The ECD may consist of an environment controller, a sensor, a controlled appliance, and a relay.

Abstract: Method and apparatus for load balancing in a Cloud-radio access network (C-RAN) are disclosed. A method includes receiving control plane (CP) data associated with a user from a core network or a remote access point; and dispatching the CP data to a first user equipment (UE) virtualized network function component (VNFC) based on a first route.

Abstract: In one embodiment, a mobile radio station in communication with a current base station of a plurality of base stations receives hello packets from one or more of the base stations. The hello packets from the current base station are received on a first frequency via a first mobile radio unit (M1) and the hello packets from one or more base stations are received on a second frequency via a second mobile radio unit (M2). When the signal strength value of the current base station exceeds a threshold value, the mobile radio station: selects a destination from the plurality of base stations based on the destination having a highest signal strength value among those in the plurality of base stations that sent hello packets to M2 on the second frequency, and forces a handoff from M1 to M2, by establishing a new link between M2 and the destination base station.

Abstract: A network element one or more network ports, network time circuitry and packet processing circuitry. The network ports are configured to communicate with a communication network. The network time circuitry is configured to track a network time defined in the communication network. In some embodiments the packet processing circuitry is configured to receive a definition of one or more timeslots that are synchronized to the network time, and to send outbound packets to the communication network depending on the timeslots. In some embodiments the packet processing circuitry is configured to process inbound packets, which are received from the communication network, depending on the timeslots.

Abstract: An ethernet bridge is configured for deployment in a network. The ethernet bridge includes a memory configured to store a first identifier that uniquely identifies the ethernet bridge within the network. The ethernet bridge also includes a transceiver configured to receive a first data link layer packet. The ethernet bridge further includes a processor configured to selectively forward the first data link layer packet based on whether a first recorded route for ethernet (RRE) in the first data link layer packet includes the first identifier. Selectively forwarding the first data link layer packet includes dropping the first data link layer packet in response to the first identifier being in the first data link layer packet or pushing the first identifier onto the first RRE in the first data link layer packet in response to the first identifier not being in the first data link layer packet.

Abstract: The present disclosure discloses a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method of receiving uplink control information in a communication system.

Abstract: Aspects of the subject disclosure may include, for example, calculating a respective first quality metric for each cell of a plurality of cells included in a network, calculating a respective second quality metric for each cell of the plurality of cells, calculating a capacity of each cell of the plurality of cells in accordance with the first quality metric for the cell and the second quality metric for the cell, and allocating traffic of the network amongst the plurality of cells in accordance with the respective capacity of each cell of the plurality of cells. Other embodiments are disclosed.

Abstract: A method for forwarding a non-access stratum (NAS) message of a user equipment (UE) in a wireless communication system is disclosed. The method includes sending an uplink (UL) NAS message including a session management (SM) message to an access and mobility management function (AMF), and receiving, from the AMF, an indication message indicating that the SM message is unroutable, wherein indication information indicating that the SM message is unroutable is delivered to a SM sublayer of the UE.

Abstract: A node comprises at least one processor configured to determine whether a degree of bandwidth degradation of a local link of the microwave node fulfils a degradation condition. Further, the at least one processor is configured to generate a signal indicating a fail of the local link, if the degradation condition is fulfilled.

Abstract: A middlebox system that maintains a load balancing configuration in a large scale IoT deployment is provided. The system performs reverse address translation for a first packet of a particular application from a first server to a first client according to a binding structure that couples a source address indicating the first client with (i) a destination addresses indicating the first server and (ii) an application client marker of the first client for the particular application. The system performs reverse address translation for a second packet of the particular application from a second server to the first client by using the application client marker in the binding structure to determine the source address indicating the first client.

Abstract: An OAM core network may receive a request for a ML/NN model and features associated with a ML/NN procedure. The OAM core network may determine a latest update to the ML/NN model and features based on the request and generate a response to the request indicative of the latest update to the ML/NN model and features. In aspects, a base station may initiate the request for the ML/NN model and features by transmitting the request for the ML/NN model and features to the OAM core network. The base station may receive the generated response of the OAM core network based on the transmitted request. In further aspects, a UE may initiate the request for the ML/NN model and features by transmitting the request to the base station, where the UE may receive the ML/NN model and features from the base station based on the transmitted request.

Abstract: A method may include obtaining multiple first parameters associated with a wireless network. The first parameters include one or more environment-specific parameters and one or more packet-specific parameters. The method may include generating a metric from a combination of the first parameters. The method may include, in response to determining to adjust the performance of the wireless network based on the metric, determining one or more operating parameters to adjust. The method may include adjusting the performance of the wireless network by adjusting the one or more operating parameters.

Abstract: In this invention, we disclose a multimedia streaming base station used preferably in a wireless communication network. The multimedia streaming base station is capable of capturing, storing, encoding, and transmitting multimedia via a local multimedia capture device. The multimedia base station can be a heterogeneous multi-RAT node, in which case the wireless communication network could be a heterogeneous mesh network. The multimedia base station could by a dynamic mesh node in alternate embodiments. Additional embodiments of the present invention include methods for facilitating streaming of locally captured multimedia content.

Abstract: Techniques for optimizing segment routing (SR) paths using segment identifiers (SIDs) are disclosed, including determining a packet is to be sent from a first node to a second node of a network using an SR method. The techniques may also include determining a segment quantization factor that is representative of a first number of SIDs that are included in a segment quantization interval. Based at least in part on the segment quantization factor and a cost constraint, an SR path defined by a second number of SIDs to send the packet may be determined. The second number of SIDs may be associated with maximizing the SIDs included in individual ones of segment quantization intervals. The techniques further include modifying the packet to include at least the second number of SIDs and causing the packet to flow from the first node to the second node via the SR path.

Abstract: A link management engine aggregates multiple links into a single link, and presents the single link to a bandwidth optimizer for a recommendation based on priorities assigned to applications. The engine may evaluate the recommendation for bandwidth optimization based on a current pipeline status, direct a packet to one of the multiple links based on the evaluation of the recommendation for bandwidth optimization, and generate a health report associated with the multiple links.

Abstract: In some embodiments, an apparatus includes a switch fabric having at least a first switch stage and a second switch stage, an edge device operatively coupled to the switch fabric and a management module. The edge device is configured to send a first portion of a data stream to the switch fabric such that the first portion of the data stream is received at a queue of the second switch stage of the switch fabric via the first switch stage of the switch fabric. The management module is configured to send a flow control signal configured to trigger the edge device to suspend transmission of a second portion of the data stream when a congestion level of the queue of the second switch stage of the switch fabric satisfies a condition in response to the first portion of the data stream being received at the queue.

Abstract: A method for improving VPN service transmission quality is disclosed where end-to-end TCP connections, occurring over a VPN tunnel, are terminated at the VPN concentrator and converted into multi-part TCP connections with MSS parameter set independently for each part of the connectivity. To facilitate the termination and multi-part connection management a packet processing software may be implemented as part of the VPN concentrator functionality or as an independent component.

Abstract: Some embodiments provide a method for performing deep packet inspection (DPI) for an SD-WAN (software defined, wide area network) established for an entity by a plurality of edge nodes and a set of one or more cloud gateways. At a particular edge node, the method uses local and remote deep packet inspectors to perform DPI for a packet flow. Specifically, the method initially uses the local deep packet inspector to perform a first DPI operation on a set of packets of a first packet flow to generate a set of DPI parameters for the first packet flow. The method then forwards a copy of the set of packets to the remote deep packet inspector to perform a second DPI operation to generate a second set of DPI parameters. In some embodiments, the remote deep packet inspector is accessible by a controller cluster that configures the edge nodes and the gateways.

Abstract: Techniques discussed herein can facilitate acknowledgment and/or re-ordering of LWIPEP (LWIP (LTE (Long Term Evolution)/WLAN (Wireless Local Area Network) Radio Level Integration Using IPSec (Internet Protocol Security) Tunnel) Encapsulation Protocol) packets. In various aspects employing a LWIP acknowledgment mode, LWIPEP packets can comprise an enhanced GRE (Generic Routing Encapsulation) header comprising a SN (Sequence Number) of the payload of that LWIPEP packet, which can facilitate acknowledgment of LWIPEP packets and re-ordering of LWIPEP packets (e.g., communicated over a WLAN link, an LTE link, or both) based on the SN(s) indicated in the enhanced GRE header(s).

Abstract: Regulating transmission of data packets between a first network and a second network over a datalink. Embodiments include determining a first plurality of token bucket rate (TBR) parameters, each TBR parameter corresponding to a one of a first plurality of packet drop precedence (DP) levels and one of a first plurality of timescales (TS). The determination of the first plurality of bucket rate parameters is based on a peak rate requirement, the data link capacity, and a nominal speed requirement associated with the data link. Embodiments also include determining a second plurality of TBR parameters based on the first plurality of TBR parameters and a guaranteed rate requirement, the second plurality comprising a further DP level than the first plurality. Embodiments also include regulating data packets sent between the first network and the second network via the data link based on the second plurality of TBR parameters.

Abstract: The invention relates to a method for transmitting data via a communications channel (106), in which the data is transmitted with a transmission frame, wherein the transmission frame has at least one prioritisation field (PCP) for establishing the priority of the message and a data field, wherein the prioritisation field (PCP) functions to control the bus access by prioritising the messages. For this purpose, a bus access controller is used, in which the priority of at least the last received data packet is stored in a minimum priority storage cell (330). After receiving a data packet, a timer (320) is started, for which a timeout value is set, which is reset when a following packet is received. After reaching the timeout value, a decrementing of the value stored in the minimum priority storage cell (330) occurs.

Abstract: A communication apparatus for inter-vehicular communication according to the present invention includes: a network state estimating unit configured to estimate network state information indicating a current network state based on driving information and channel state information of neighboring vehicles; a network access controller configured to control whether to transmit a message based on the network state information; a transmission scheduler configured to control a transmission time point of the message based on the network state information; and a transmission buffer unit configured to delay transmission of the message according to the control of the transmission time point of the transmission scheduler.

Abstract: A communication apparatus for inter-vehicular communication according to the present invention includes: a network state estimating unit configured to estimate network state information indicating a current network state based on driving information and channel state information of neighboring vehicles; a network access controller configured to control whether to transmit a message based on the network state information; a transmission scheduler configured to control a transmission time point of the message based on the network state information; and a transmission buffer unit configured to delay transmission of the message according to the control of the transmission time point of the transmission scheduler.

Abstract: Provided is a communication apparatus and a method that allow for synthesis of information using an original signal and a retransmission signal for retransmitting information of the original signal whose demodulation has failed, in wireless communication with independent physical layer and MAC layer. Information is transmitted regarding a configuration of a retransmission signal for retransmitting information of an original signal whose demodulation has failed to a sender of the retransmission signal, and the retransmission signal transmitted from the sender is received on the basis of the information regarding the configuration of the retransmission signal transmitted. The present disclosure is applicable, for example, to a transmission/reception apparatus, a communication apparatus, an information processing apparatus, electronic equipment, a computer, a storage medium, and a system, and so on.

Abstract: In accordance with the example embodiments of the invention there is at least a method and apparatus to performing determining, by a device of a communication network, that at least one PDCP PDU of a PDCP sublayer is duplicated for transmission over at least one logical channel; signaling to an RLC sublayer an indication of the at least one PDCP PDU that is duplicated; and based on the signaling, controlling duplication of the at least one PDCP PDU for transmission over the at least one logical channel. Further, performing receiving, at a device of a communication network, an indication through a received signaling indicating that at least one PDCP PDU of a PDCP sublayer is to be duplicated; determining to duplicate the at least one PDCP PDU; duplicating the at least one PDCP PDU based on the determination; and transmitting the duplicated PDCP PDU over at least one logical channel.

Abstract: A method is provided by which a network adapter device receives a packet sent over a network from a peer, the packet including an enqueue timestamp indicating when the packet has been enqueued at the network adapter device. The network adapter device parses a header of the packet to detect whether the header includes bits indicating that the peer device is experiencing congestion, and obtains packet metadata of the packet and the enqueue timestamp of the packet. The network adapter device compares the packet metadata with information in a flow table to identify an entry in the flow table corresponding to a flow to which the packet metadata matches. The network adapter device sets a timer associated with the flow, the timer for use in scheduling transmission of a next packet provided by the host to be sent to the peer.

Abstract: The present application relates to broadcast bearer management methods and devices. One example method includes receiving, by a first bearer management server (BMS), a first message sent by a service server, where the first message includes a group identifier of a service group, determining, by the first BMS, a first broadcast bearer for the service group based on the first message, and sending, by the first BMS, a second message to the service server, where the second message carries user plane information of the first broadcast bearer.

Abstract: Disclosed herein is a system, method, and computer program product for dynamically altering message rates through a transport. The system, method, and computer program product continually operates a transport and analyzes trend data using a moving average of producer rates and consumer rates. Keeping message flow at an optimal rate as system conditions vary throughout time enables efficient delivery of messages through multiple subsystems and intermediary transports to the messages' manifold endpoints.

Abstract: An electronic device, according to one embodiment, comprises: a wireless communication circuit for providing at least one cellular wireless communication; a secure element comprising profile information associated with the wireless communication, the profile information including notification configuration information; at least one processor operatively connected to the wireless communication circuit and the secure element; and a memory operatively connected to the at least one processor, wherein the at least one processor may acquire the notification configuration information from the secure element, transmit a notification associated with profile management to an external server, acquire a response indicating the failure of the notification from the external server as a response to the notification, and retry transmitting the notification on the basis of the notification configuration information. In addition, various embodiments are possible as identified in the specification.

Abstract: A method is defined for transferring a user interface from at least one server via a proxy to at least one client. A user interface of the server is transferred to the client such that the user interface is displayed on the client, and the server may be controlled from the client. In order to display the user interface on the client, a data stream of a plurality of successive frames is transmitted from the server to the client by a packet-based transfer. A latency of the transfer is determined recurrently for individual frames in order to monitor the transfer. In addition, a medical device and a server are defined.

Abstract: Various embodiments include methods, apparatus, and systems for assigning a plurality of version number values to instances of a logical entity of a memory device. Each version number value of the plurality version number values may be separately assigned to one of the instances of the logical entity. The version number values may be recycled after the plurality of version number values are assigned. Other embodiments including additional methods, apparatus, and systems are disclosed.

Abstract: [Object] To make it possible to reduce wasteful retransmission processing and improve use efficiency of communication channels with regard to wireless LAN systems. [Solving Means] There is provided a wireless LAN communication apparatus including: a transmitter that transmits a data frame storing a plurality of fixed-length pieces of coded data for which it is possible to determine whether or not decoding is successfully performed; and a controller that controls retransmission processing in units of the pieces of coded data.

Abstract: Systems, methods, and apparatus receive a corrupted packet of an original packet and at least one corrupted retransmitted packet of the original packet and generate a decision packet for the original packet based on identical bits of the original packet received through the corrupted packet and the at least one corrupted retransmitted packet. Embodiments verify the decision packet to determine whether the decision packet is correct based on a last one of the at least one corrupted retransmitted packet and a one or more cyclic redundancy check (CRC) operations.

Abstract: A method and system for steering bidirectional network traffic to a same service device. Specifically, the disclosed method and system entail the maintaining and synchronization of link aggregation group (LAG) tables tied to a pair of LAG ports instantiated on a network element directly connected to a pair of peer linking service devices. Network traffic (i.e., MAC frames) arriving at the network element, from a first host and intended for a second host (e.g., indicative of a first direction of the network traffic), may be steered towards one of the pair of service devices based on hashing of information included in a received MAC frame in conjunction with the LAG table tied to the LAG port (of the pair of LAG ports) that which received the MAC frame.

Abstract: A system for providing a mapping service for distributed data storage systems includes a plurality of computing devices configured to implement a service provider network. The service provider network includes a plurality of endpoints corresponding to a plurality of data servers. Each data server of the plurality of data servers is configured to receive, from a client, a request for client data stored at the plurality of data servers and send, to a mapping service, a mapping request. The data server receives, from the mapping service, a list of a subset of the plurality of data servers, where each data server of the subset stores at least a portion of the client data. The data server generates a response to the client data request including a data portion and a server identifier portion and sends the generated response to the client.

Abstract: An aggregated switch PBR system includes aggregated switches coupled together by an ICL and to a first core switch by a first LAG. A first aggregated switch includes a first link in the first LAG, and a second link to a second core switch. The first aggregated switch provides a first PBR entry in its PBR table that redirects packets initially provided for forwarding via the second link to the second core switch such that those packets are forwarded via the first link to the first core switch. When the first link becomes unavailable, the first aggregated switch provides a second PBR entry in its PBR table that redirects the packets initially provided for forwarding via the second link to the second core switch such that those packets are forwarded via the ICL to the second aggregated switch for transmission via the first LAG to the first core switch.

Abstract: Mapping information of a bearer or quality of service can be communicated from a Wireless Local Area Network Termination (WT) to the enhanced Node B (eNB), which then uses radio resource control (RRC) signaling to communicate the mapping to the user equipment (UE). For example, three options can be used to communicate mapping information: (1) Operations and Management (OAM), (2) Semi-static Xw-AP signaling (e.g., WT Configuration Update or Xw Setup procedures) or (3) Dynamic Xw-AP procedures (e.g., WT Addition Request procedure). In some embodiments, the mapping can be signaled by (1) bearer to wireless local area networks (WLAN) access category (AC) mapping or (2) long term evolution (LTE) quality of service class identifier (QCI) to WLAN AC mapping.

Abstract: Method for radio communication with base station, by user equipment (UE), apparatus in UE for radio communication with base station, a method for radio communication with a UE by a base station, and an apparatus in a base station for radio communication with a UE are provided. The method for radio communication with a base station, by a UE, includes identifying whether an uplink resource allocated for data transmission to the base station is available, in response to a buffer status report for transmission to the base station being triggered; transmitting an uplink packet including the buffer status report using the available uplink resource, in response to the uplink resource being available; and transmitting a scheduling request to the base station, in response to the UE not having an available uplink resource and a first timer being expired, wherein the first timer starts when the buffer status report is triggered.

Abstract: A split of radio protocols is applied within a cellular base station, between at least one virtualization platform connected through user data interfaces to Radio Transceiver Points (R-TP) serving a UE. It is provided a header for transporting a QoS information value, belonging to a set including a delay budget under 50 ms, related to at least one data packet transmitted to the given UE by a specific application. The header and the data packet are tunneled to the R-TP serving the UE. A control interface, conveying QoS requirements of the specific application, is established between a Central Controller or a Central Coordinator of the base station and the serving R-TP. The data packet is transmitted over the air to the given UE, being scheduled while considering the QoS information included within the provided header and the conveyed QoS requirements.

Abstract: Embodiments of this application provide network traffic marking and measurement methods and a node, and relate to the field of communications technologies, and specifically, to network traffic measurement and network traffic distribution. The network traffic measurement method includes: receiving, by a second node, a data packet sent by another node in a network, where the data packet is periodically marked by the another node, and each node has a different period of marking a data packet. According to the application, the second node may distinguish, based on the period of marking the data packet, traffic sent by the another node in the network, to obtain network traffic sent by the another node in the network to the second node. Upon implementing the traffic measurement method, data plane overheads can be reduced, and a hardware implementation process is simplified.

Abstract: Features are disclosed for managing routing rules stored by a routing device and used to manage network traffic in a network. A computing device can receive multiple routing rules corresponding to multiple routing devices in the network. The computing device can use a formal specification and a snapshot to generate a model of the network. The computing device may use the model in order to statically determine the set of possible paths without causing the transmission of data between a routing device and a destination. the computing device may compare the identified routing rules and the possible paths in order to determine excess routing rules. The computing device may remove the excess routing rules from the routing rules for each routing device such that each routing device routes subsequent network traffic based on the updated routing rules.

Abstract: Network nodes, methods and computer program products are disclosed. The network node is for a wireless telecommunications network and comprises: processing logic operable to execute an application which establishes a data session for transmission of data packets between the network node and another network node; a first radio interface operable to support transmission of data packets with the another network node using a first radio access technology in accordance with any of a plurality of different data transport protocols; a second radio interface operable to support transmission of data packets with the another network node using a second radio access technology in accordance with any of a plurality of different data transport protocols; and a controller operable to select which radio interface and data transport protocol to use for transmission of the data packets of the data session between the network node and the another network node.

Abstract: A method for managing a mobile node of an SDN controller according to an aspect of the present disclosure includes receiving a router solicitation message of a mobile node transmitted through a first AP operated by the SDN controller.

Abstract: Disclosed are a flow classifier, policy and charging rules function unit and controller. The flow classifier receives a service chain selection control policy sent by a policy and charging rules function unit. The service chain selection control policy includes a corresponding relation between an application type and an identifier of a service chain. The service chain is a path formed by a forwarding device and a value-added service device both of which a service flow with the application type needs to pass through. The flow classifier detects the service flow with the application type based on the service chain selection control policy and adds the identifier of the service chain to a message of the service flow. The flow classifier sends the message of the service flow with the added identifier of the service chain to a forwarding device directly connected to the flow classifier.