Abstract: A method includes a gateway node that obtains a data transmission parameter between a first-level node and each node in a first node set, where the first-level node is located on a first-level power distribution device in a power distribution grid, and the first node set includes a node located on a power distribution device at another level in the power distribution grid other than the first-level power distribution device; determines a second-level node directly coupled to the first-level node from the first node set based on the data transmission parameter between the first-level node and each node in the first node set; and generates a physical network topology of the power distribution grid.

Abstract: This application provides a latency-based transmission path control method, an apparatus, and a system. Device latencies of network node devices on an active transmission path, device latencies of network node devices on a standby transmission path, latencies of links between the network node devices on the active transmission path, and latencies of links between the network node devices on the active transmission path are obtained, and calculation is performed based on the respective device latencies and link latencies to obtain an active transmission path latency and a standby transmission path latency. Then, based on a latency-based switching mechanism, when the active transmission path latency is greater than a switching threshold and the standby transmission path latency is less than the switching threshold, an active-to-standby path switching command is generated.

Abstract: The present invention provides use of salidroside and a derivative thereof in preparation of an inhibitor medicament for treating diseases, such as opthmalmic fibrosis, caused by abnormalities of extracellular matrix proteins. The present invention treats and prevents diseases associated with ocular fibrosis such as glaucoma, by inhibiting the expression of extracellular matrix proteins in the eye to prevent fibrosis. The present invention further provides use of an inhibitor medicament for treating and preventing diseases, such as opthmalmic fibrosis, caused by abnormalities of extracellular matrix proteins, the inhibitor medicament comprising an effective amount of salidroside and a derivative thereof as active ingredients.

Abstract: A method of delay measurement of a network node device is disclosed. The method includes obtaining a node delay value of a current packet when a preset time period starts. The method further includes determining, based on M+1 boundary values of preset M delay intervals, a delay interval in which the node delay value is located, and adding 1 to a value of a delay segment counter corresponding to the delay interval in which the node delay value is located, where M>1, M is a positive integer. The method further includes obtaining a node delay value of a next packet until the preset time period ends. The method further includes determining a cumulative probability Pacc.j that is greater than or equal to a target probability, and obtaining, as a delay threshold, a node delay value having the target probability.

Abstract: A physical layer chip of a first physical port of a network device receives a packet and sends a first time stamp and the packet to a Media Access Control (MAC) chip of the first physical port. The MAC chip of the first physical port adds the first time stamp to the packet and sends the packet. A MAC chip of a second physical port receives the packet, extracts the first time stamp of the packet, and sends the packet to a physical layer chip of the second physical port. The MAC chip of the second physical port receives a second time stamp of the packet. The network device calculates a processing delay for the packet. The processing delay is a value obtained by subtracting the first time stamp from the second time stamp.

Abstract: This application provides a latency-based transmission path control method, an apparatus, and a system. Device latencies of network node devices on an active transmission path, device latencies of network node devices on a standby transmission path, latencies of links between the network node devices on the active transmission path, and latencies of links between the network node devices on the active transmission path are obtained, and calculation is performed based on the respective device latencies and link latencies to obtain an active transmission path latency and a standby transmission path latency. Then, based on a latency-based switching mechanism, when the active transmission path latency is greater than a switching threshold and the standby transmission path latency is less than the switching threshold, an active-to-standby path switching command is generated.

Abstract: The present disclosure provides a delay measurement method of a network node device, a delay measurement apparatus, and the network node device. The delay measurement apparatus separately performs corresponding delay measurement on a node delay value generated when a packet is transmitted from an ingress port of the network node device to an egress port of the network node device. Serviceability, availability, and reliability of delay performance of the network node device can be evaluated based on obtained delay measurement data. Therefore, precise quantitative evaluation and monitoring of delay reliability of the network node device can be completed based on comprehensive delay measurement data.

Abstract: A physical layer chip of a first physical port of a network device receives a packet and sends a first time stamp and the packet to a Media Access Control (MAC) chip of the first physical port. The MAC chip of the first physical port adds the first time stamp to the packet and sends the packet. A MAC chip of a second physical port receives the packet, extracts the first time stamp of the packet, and sends the packet to a physical layer chip of the second physical port. The MAC chip of the second physical port receives a second time stamp of the packet. The network device calculates a processing delay for the packet. The processing delay is a value obtained by subtracting the first time stamp from the second time stamp.

Abstract: A packet loss rate detection method, apparatus, and system relating to a Packet Switching Network (PSN) are provided, and the method includes: transmitting, by a transmitting end, data packets and Operation, Administration, and Maintenance (OAM) packets, and writing a counting value of the data packets into the subsequent OAM packets after a time delay, and receiving, by a receiving end, the data packets and the OAM packets, counting a number of the received data packets, and calculating a packet loss rate based on the number of the practically received data packets and the counting value carried in the OAM packets.

Abstract: The present disclosure relates to the communications field and discloses a method, an apparatus, and a system for transmitting packet service data Packet service data is sent by a User Equipment (UE). It is determined whether the packet service data is Internet service data according to a pre-obtained Internet service offloading policy. If the packet service data is Internet service data, the packet service data is transmitted to a Public Data Network (PDN) via a Metropolitan Area Network (MAN) and an IP backbone. Embodiments of the present disclosure may be applied to wireless communication systems such as a WCDMA system.

Abstract: The present invention relates to a method for accessing integrated services by an access network, including: establishing at least one Multi-Protocol Label Switching (MPLS) Label Switch Path (LSP) in a broadband access network; MPLS encapsulating at a broadband access node a service to be transmitted, and transmitting the encapsulated service in the broadband access network via the LSP.

Abstract: An embodiment of the present invention discloses a method for distributing a service according to a terminal type, wherein a correspondence relation table for storing correspondence relations between a terminal type and an IP address of a network administration server, and an IP address of a service server is preset in a DHCP (Dynamic Host Configuration Protocol) server, and the method comprises the steps of: a terminal initiating, a DHCP access request to a network with terminal type information included in the access request; the DHCP server issuing an assigned IP address to the terminal, and querying for and issuing an IP address of a network administration server and an IP address of a service server corresponding to the terminal type information; the terminal registering with the network administration server according to the obtained IP address of the network administration server, and obtaining an access to the network; the terminal initiating a service request to the service server according to the ob

Abstract: A packet loss rate detection method, apparatus, and system relating to a Packet Switching Network (PSN) are provided, and the method includes: transmitting, by a transmitting end, data packets and Operation, Administration, and Maintenance (OAM) packets, and writing a counting value of the data packets into the subsequent OAM packets after a time delay, and receiving, by a receiving end, the data packets and the OAM packets, counting a number of the received data packets, and calculating a packet loss rate based on the number of the practically received data packets and the counting value carried in the OAM packets.

Abstract: A method of a user terminal obtaining its access location information in next generation network, and a user terminal, and a server having function of Dynamic Host Configuration Protocol (DHCP) function are disclosed. DHCP is extended by adding a new DHCP option to carry the user terminal access location information; when the user terminal accesses to network, DHCP server puts the DHCP option into DHCP response message; receiving the DHCP response message, the user terminal obtains the access location information from the DHCP option. The present invention overcomes the shortcoming of the prior art that when a terminal nomadizes or roams from one access network to another, the access network information configured on the terminal has to be updated manually and thus results in redundant workload and inflexibility, the user terminal is allowed to obtain its access location information automatically, hence nomadicity or roaming of the user terminal is supported.

Abstract: The present invention relates to a method for accessing integrated services by an access network, including: establishing at least one Multi-Protocol Label Switching (MPLS) Label Switch Path (LSP) in a broadband access network; MPLS encapsulating at a broadband access node a service to be transmitted, and transmitting the encapsulated service in the broadband access network via the LSP.

Abstract: A resource management (RM) method, an RM system, and a network equipment are described. The network equipment is directly or indirectly connected to a UE via at least one user link. The network equipment includes a receiving unit and an RM unit. The receiving unit receives a resource request triggered by the UE or a network side equipment when a user requests a first service by the UE. The RM unit includes: a resource admission control module, adapted to provide the UE with a resource admission control function containing the first service according to the resource request; a determination module, adapted to determine whether sufficient available user link resources are reserved for the first service; and a resource coordination module, adapted to coordinate occupied user link resources to meet requirements of the first service if the determination module determines that the available user link resources are insufficient.

Abstract: A multicast service processing method and access equipment are disclosed. The method includes: receiving multicast program request message from terminal device, inquiring about program rating parameters according to said multicast program request message, wherein the program rating parameter includes multicast group IP address and multicast program rated priority, generating multicast program data according to the program rating parameters, sending the multicast program data to the terminal device.

Abstract: A method of a user terminal obtaining its access location information in next generation network, and a user terminal, and a server having function of Dynamic Host Configuration Protocol (DHCP) function are disclosed. DHCP is extended by adding a new DHCP option to carry the user terminal access location information; when the user terminal accesses to network, DHCP server puts the DHCP option into DHCP response message; receiving the DHCP response message, the user terminal obtains the access location information from the DHCP option. The present invention overcomes the shortcoming of the prior art that when a terminal nomadizes or roams from one access network to another, the access network information configured on the terminal has to be updated manually and thus results in redundant workload and inflexibility, the user terminal is allowed to obtain its access location information automatically, hence nomadicity or roaming of the user terminal is supported.

Abstract: The present invention provides a method a system and a network device for exception handling of multicast service, including: determining that the multicast bandwidth limitation of the port is exceeded or the number limitation of the multicast groups the port joins is exceeded, upon receiving a multicast join request from a port; finding out a multicast group which has no members on the port; stopping forwarding traffic of the multicast group to the port. In the present invention, problems, such as packet losing, failing to change channels, line bandwidth waste, home network bandwidth waste, due to the losing of an IGMP Leave message in applications such as the IPTV, may be solved.

Abstract: A method, a system and an authentication server for realizing a secure assignment of a DHCP address are disclosed. The method includes: sending a DHCP Discovery message via an access network; obtaining the identification information of the DHCP client and performing an authenticating to the DHCP client based on the identification information; and only assigning the address to the DHCP client has passed the authentication. Therefore, in the present invention, access authentication may be performed on a subscriber according to location information, and IP address is only assigned to the valid subscriber and terminal. Therefore, the security of the address assignment in DHCP mode may be enhanced greatly. Moreover, in the present invention, addresses may be managed by an AAA server unitedly, or the addresses may be assigned after being authenticated by the AAA server successfully.