109 results about "Type-length-value" patented technology

A novel technique is provided for preventing routing loops by disseminating Border Gateway Protocol (BGP) attribute information in an Open Shortest Path First (OSPF) configured network. Specifically, a new OSPF sub-type-length-value (TLV) is introduced for transporting a conventional BGP autonomous system (AS) path attribute through the OSPF-configured network. Like the BGP AS-path attribute, the new OSPF AS-path sub-TLV is configured to store a set of AS numbers corresponding to the AS path of one or more advertised routes. Thus, when a network device receives an OSPF link-state advertisement (LSA) containing the novel AS-path sub-TLV, the network device determines whether it resides in an autonomous system whose AS number is stored in the sub-TLV. If so, the network device does not install the LSA's advertised routes in its link-state database since the routes, if installed, could result in routing loops.

A system and method for advertising out-of-resources (OOR) conditions for entities, such as nodes, line cards and data links, in a manner that does not involve using a maximum cost to indicate the entity is “out-of-resources.” According to the technique, an OOR condition for an entity is advertised in one or more type-length-value (TLV) objects contained in an advertisement message. The advertisement message is flooded to nodes on a data network to inform them of the entity's OOR condition. Head-end nodes that process the advertisement message may use information contained in the TLV object to determine a path for a new label switched path (LSP) that does not include the entity associated with the OOR condition.

The invention relates to quick heavy-route method and label switching router. The method comprises: setting standby path for label switching path based on constrained routing and binding with the label switching path, first node of label switching path receiving notice information with path protection type-length-value TLV from insert knot of standby path when the label switching path is in failure, switching data of failure path to standby path for label transmission. The inventive example provides a label exchange tunnel based on constrained condition as prefabricated standby path to protect CR-LSP and avoid link and node failure.

Methods are disclosed for generating a data packet at a sending node of the network that conforms to a media access control (MAC) layer protocol for network communications. The data packet includes a MAC header and a data segment, wherein data in said data segment is encoded as a type-length-value element identifying a value for an operating parameter of the network. The data packet is transmitted from the sending node to a receiving node. At the receiving node, the data packet is processed at the MAC sublayer of network protocols to retrieve said element and determine the value for the operating parameter. Operating parameters within the receiving node are adjusted to conform to the determined value of the operating parameter.

A data structure for implementing a traffic engineering function in a multiprotocol label switching system comprises: a subscriber profile including a plurality of entries for storing forwarding equivalence class (FEC) information required for setup of a label switched path (LSP) based on the traffic engineering function, the entries of the subscriber profile being sequentially assigned indexes corresponding to one traffic engineering service subscriber identification (ID); a path profile including a plurality of entries for storing respective path information items regarding a type length value (TLV) of a signal protocol required for setup of an explicit routed label switched ath (ER-LSP) based on the traffic engineering function, the entries of the path profile being sequentially assigned indexes corresponding to respective path information items; and a quality of service (QoS) profile including a plurality of entries for storing respective QoS information items regarding a TLV of a signal protocol required for setup of a constraint routed label switched path (CR-LSP) based on the traffic engineering function, the entries of the QoS profile being sequentially assigned indexes corresponding to respective QoS information items. The indexes assigned to the profile entries include a plurality of indexes set by an operator for interlinking corresponding ones of the subscriber profile entries, the path profile entries, and the QoS profile entries.

Ethernet fault management systems and methods using programmable Type-Length-Value (TLV) offsets combine software-based Operations, Administration, and Maintenance (OAM) protocol support with hardware-based fault management support to delegate generation and processing of OAM protocol messages to hardware devices with the software-based protocol support used to program hardware based on fixed offsets in the OAM protocol messages. The hardware can be designed to be flexible since the hardware can be agnostic to the logic within the OAM protocol which would reside in the software. The Ethernet fault management systems and methods combine the flexibility of software-based approaches with the speed and efficiency of hardware-based approaches.

The invention relates to the filed of network communications, in particular to method and device for measuring network performance parameters. The method comprises the steps of: receiving an extensible Bidirectional Forwarding Detection (BFD) message which includes a packet-loss monitoring type length value TLV and / or a time delay monitoring TLV, and calculating the network performance parametersaccording to the received packet-loss monitoring TLV and / or the time delay monitoring TLV in the extensible BFD message. The device comprises an extensible BFD message sending module, an extensible BFD message receiving module and a network performance parameter calculating module. The technical scheme provided in the embodiment of the invention can calculate various network performance parameters, solve the problem of network performance monitoring in the prior technical scheme and monitor the network performance.

In a data over satellite system, preallocation of upstream channel resources is provided by a scheduler at the gateway satellite modem termination system (SMTS) in response from the user terminal, wherein the user terminal detects web browser and / or bulk transfers involving large amounts of data transfer from users via the upstream channel. A type length value (TLV) field is included with data packets transmitted to the gateway SMTS, at which excess transfer capability is allocated to the user terminal in anticipation of load requirements.

Embodiments of the present disclosure provide systems and methods to enable a Power Source Equipment (PSE) and a Powered Device (PD) advertise their identity, capabilities, and neighbors by exchanging IEEE Standard 802.1AB Link Layer Discovery Protocol (LLDP) information in Ethernet frames. Each Ethernet frame contains one or more LLDP Data Units (LLDPDUs) corresponding to a sequence of type-length-value (TLV structure) structures. The PSEs and PDs utilize optional TLV Structures from among the one or more LLDPDUs to advertise their PoE capabilities.

Solutions are provided that allow a network device to apply flow control on the MAC layer while taking into account the priority of the frame of traffic. This may be accomplished by generating a frame indicating that traffic flow should be paused, while utilizing a new opcode value, or alternatively by utilizing a new type / length value (possibly combined with a new opcode value). A receiving device may then examine the fields of the frame to determine whether it should it should use priority-based pausing, and then examine other fields to determine which priority-levels to pause and for how long. This allows for improved efficiency in flow control at the MAC layer. Additionally, the tagged pause frames can be forwarded over multiple hops on Local Area Networks across a Metropolitan Area Network or Wide Area Network.

A system advertises a multifunctional control channel (MFCC) in an interface parameter sub-type-length-value (TLV) of an advertisement label mapping message that is dispatched to a network device. The system also processes a reply label mapping message that is transmitted from the network device in response to the advertisement label mapping message and updates a label information base to establish a pseudowire and a MFCC associated with the pseudowire.

Label distribution protocol (LDP) signaled label-switched paths (LSPs) are supported without requiring information about remote autonomous systems (ASs) to be injected into the local interior gateway protocol (IGP). This may be done by (i) decoupling a forwarding equivalency class (FEC) element from the routing information, and (ii) specifying a next hop on which the FEC relies. An LDP messaging structure (e.g., an LDP type-length-value (TLV)) that includes a label, FEC information (e.g., a host address or prefix of an egress LSR of the LSP) and a next hop (e.g., a host address or prefix of a border node, such as an AS border router (ASBR)) may be provided. This messaging structure may be included in one or more of (a) label mapping messages, (b) label withdraw messages, and (c) label release messages. If an LDP message including the expanded LDP messaging structure is received at a node, the node may determine whether or not to propagate the LSP using the next hop information, rather than the FEC information. If, on the other hand, the LDP message includes a normal LDP messaging structure, the node may determine whether or not to propagate the LSP as usual.

A method for state based forwarding using an embedded flag in the type length values (TLV) architecture of information centric network (ICN) interfaces, the method comprises storing, in static and dynamic fashions forward information for ICN router interfaces, the stored information is stored in a pending interest table (PIT) table associated with the ICN router interface. Next, using, a flag within the stored information in the TLV architecture of the ICN router interface wherein the flag is associated with an interest capability of the ICN router interface. Further, receiving, an interest associated with flag for forwarding at the ICN router interface, and checking, the received interest with the stored information in the PIT table of the ICN router interface for forwarding to a content source.

A method for transmitting messages comprises the following steps that: a first Maintenance association End Point (MEP) transmits measurement messages, wherein the measurement message is transmitted from the first MEP to a second MEP through at least one Maintenance association Intermediate Point (MIP); and each of the MIPs receives the measurement message, expands a Type-Length-Value (TLV) in the measurement message, records the measurement data of each MIP in the expanded TLV, and transmits the measurement message. By the method for transmitting messages, the performance data of all nodes on a path can be acquired during a test.

A Base Station (BS) for transmitting a ranging response message to a Mobile Station (MS) in a communication system is provided. The ranging response message comprises a Unified Type-Length-Value (TLV) encoding for a power saving class parameter. The Unified TLV encoding comprises only a value parameter for each of a plurality of Information Elements (IEs) used for defining a power saving class.

The invention provides a method and a system for realizing fault detection in a bidirectional path segment. In the invention, when a transmitting node transmits a request message, a novel type-length-value (TLV) which is used by a receiving node of the request message for determining the number of hops between a response message created by the receiving node of the request message and the transmitting node of the request message, namely the initial value of the time to live (TTL) in a pseudowire (PW) or label switched path (LSP) label is carried by the request message. The middle node in the tested bidirectional path segment does not perform any treatment on the TLV, so when the request message arrives at a target node, the target node can determines the TTL value in the PW label or LSP label of the response message according to the TLV value; and thus, the correct arrival of the response message at the transmitting node of the request message as well as the correctness of the fault detection in the bidirectional path segment is guaranteed.

The invention discloses a method, device and routing equipment for avoiding black holes. The method comprises the following steps: the second routing equipment computes a second path cost value between the first routing equipment and the second routing equipment according to a first path cost value and a corresponding multiple value in the path cost type length value (TLV) sent by the first routing equipment; the second path cost value meets the condition that when the second path cost value is used for carrying out routing computation, in the same routing, the path cost value of each path which passes through the first routing equipment is greater than the path cost value of each path which does not pass through the first routing equipment; and the second routing equipment forwards a data message through a backup path which does not pass through the first routing equipment according to the second path cost value. The invention ensures that under a narrow measurement mode of the intermediate system to intermediate system (IS-IS) protocol, in a short time after the first routing equipment finishes the restart, the second routing equipment certainly forwards the data message through the backup path which does not pass through the first routing equipment, thereby more reliably solving the problem of routing black holes.

Solutions are provided that allow a network device to apply flow control on the MAC layer while taking into account the priority of the frame of traffic. This may be accomplished by generating a frame indicating that traffic flow should be paused, while utilizing a new opcode value, or alternatively by utilizing a new type / length value (possibly combined with a new opcode value). A receiving device may then examine the fields of the frame to determine whether it should it should use priority-based pausing, and then examine other fields to determine which priority-levels to pause and for how long. This allows for improved efficiency in flow control at the MAC layer. Additionally, the tagged pause frames can be forwarded over multiple hops on Local Area Networks across a Metropolitan Area Network or Wide Area Network.

Systems and methods of propagating frame loss information by a node in an Ethernet network include detecting one or more of service unaware port discards and service aware port discards; determining statistics based on the one or more of service unaware discards and service aware port discards; and transmitting the determined statistics to a sender node through one of a Link Layer Discovery Protocol Data Unit (LLDPDU) and a Link Trace Message (LTM). The LLDPDU and the LTM can include an organization specific Type-Length-Value (TLV) with a TLV information string therein based on the determined statistics and cause of the one or more of service unaware discards and service aware port discards.

The invention provides a route generation method and a route generation device for fiber channel over Ethernet (FCOE). By means of improvement on Hello messages of an intermediate system to intermediate system (ISIS) protocol and type-length-value (TLV) coding information carried by a link state protocol (LSP) data unit, the route generation method and the route generation device can achieve neighbor discovery of a fiber channel (FC) protocol with the help of the Hello messages of the ISIS protocol and synchronously achieve link information synchronization of the FC protocol with the help of the LSP of the ISIS protocol. Therefore, generation of FC route can be achieved without the need of a fabric shortest path first (FSPF) system, and the FCOE can be achieved by low cost.

A method is implemented by a network device executing a local computation engine and a link state routing protocol. The local computation engine and the link state protocol support automatic establishment of redundant paths and cautious restoration in a packet network. The method includes receiving an explicit path (EP) type length value (TLV) via a link state routing protocol, executing a shortest path algorithm to obtain a shortest path for loose hops of a path identified by the EP TLV, the shortest path to be a primary path, updating a network graph to prune links of the primary path or bias links of the primary path, and calculating a backup path using the shortest path algorithm on the updated network graph.

The invention provides a method for transferring information between a baseband digital processing unit and a radiofrequency unit. The method comprises the following steps: step 1: transferring the information between the baseband digital processing unit and the radiofrequency unit, wherein the information includes an information describing part containing the information type, the information length and the information content field; the information content field is composed of a plurality of information units, and each unit adopts the Type-Length-Value form to describe; the Type represents the concrete information type carried by the information unit; the Length represents the information content length carried by the information unit; and the Value represents the concrete content carried by the information unit. And Step 2: the baseband digital processing unit or the radiofrequency unit analyzes the received information and analyzes the information according to the information typefield and information length field. By adopting the method, better compatibility can be ensured between the new and the old radiofrequency units and the baseband digital processing unit.

A method (300) and system (200) for adding a connection identifier to an existing power saving class. The method can include the steps of—at a mobile unit (212) that is associated with at least one existing power saving class—generating (310) a type-length-value that specifies the identification of the existing power saving class, and integrating (312) the type-length-value into a dynamic service message request. The method can also include the step of transmitting (314) the dynamic service message request to a base station (210) such that the connection identifier will be automatically added to the existing power saving class without requiring deactivation or redefinition of the existing power saving class.

A data structure for implementing a traffic engineering function in a multiprotocol label switching system comprises: a subscriber profile including a plurality of entries for storing forwarding equivalence class (FEC) information, the entries of the subscriber profile being sequentially assigned indexes corresponding to one traffic engineering service subscriber identification (ID); a path profile including a plurality of entries for storing respective path information items regarding a type length value (TLV) of a signal protocol, the entries of the path profile being sequentially assigned indexes corresponding to respective path information items; and a quality of service (QoS) profile including a plurality of entries for storing respective QoS information items regarding a TLV of a signal protocol, the entries of the QoS profile being sequentially assigned indexes corresponding to respective QoS information items. The indexes assigned to the profile entries include a plurality of indexes set by an operator for interlinking corresponding ones of the subscriber profile entries, the path profile entries, and the QoS profile entries.

A system and method for advertising out-of-resources (OOR) conditions for entities, such as nodes, line cards and data links, in a manner that does not involve using a maximum cost to indicate the entity is “out-of-resources.” According to the technique, an OOR condition for an entity is advertised in one or more type-length-value (TLV) objects contained in an advertisement message. The advertisement message is flooded to nodes on a data network to inform them of the entity's OOR condition. Head-end nodes that process the advertisement message may use information contained in the TLV object to determine a path for a new label switched path (LSP) that does not include the entity associated with the OOR condition.

The invention discloses a Beacon frame sending method, which comprises the following steps that: an access point (AP) receives control messages issued by an access controller, and the control messages comprise information of at least two wireless services; the AP uses the information of at least two wireless services for a configuring type length value (TLV) and individual fields aiming at wireless services in a Beacon frame for forming the Beacon frame comprising at least two wireless services, and the TLV is used for indicating the deflection quantity of base media access control (MAC) of each wireless service aiming at the Beacon frame and the deflection position of the individual field of each wireless service in the Beacon frame; and the AP sends the Beacon frame to a wireless client. The invention also discloses a Beacon frame receiving method, which comprises the following steps that: the wireless client receives the Beacon frame, the basic service identification code corresponding to each wireless service is analyzed according to the TLV, the individual field corresponding to each wireless service is read, a public field is read, and the information of several wireless services in the Beacon frame is obtained. The invention also discloses the AP and the wireless client. The efficiency of the Beacon frame for issuing the wireless services can be improved.

The invention discloses a real-time traffic reporting method, a media endpoint and a real-time traffic reporting system. The method comprises that: when establishing a multimedia session, the link layer discovery protocol media endpoint discovery (LLDPMED) media endpoint updates the total code rate of each media stream input port used by the session according to the code rate of each media stream input port used by the session, carries the latest total code rate of own initiated media stream input ports into an expanded type length value (TLV) after the establishment of the multimedia session is finished and a media channel is enabled, and transmits the expanded TLV to network access equipment; and the network access equipment receives the expanded TLV, and performs bandwidth control and quality of service (QoS) guarantee processing according to the total code rate of each media stream input port in the expanded TLV. By the real-time traffic reporting method, the media endpoint and the real-time traffic reporting system, the accurate bandwidth control and QoS guarantee processing of the network access equipment is realized.

Embodiments of the present invention provide a method and a device for virtualized access. By using a type-length-value (TLV) field in an extended packet based on the Intermediate System to Intermediate System (IS-IS) protocol, the extended packet based on the IS-IS protocol can carry an address information configuration request of an access device, so that when receiving the request packet carrying the address information configuration request, a virtual control node on a network can return, to the access device, a response packet carrying address information for configuration, and therefore, the access device configures an address according to the address information in the response packet, and accesses the virtual control node according to the configured address. In this manner, virtualized access based on the IS-IS protocol by an access device is implemented, which reduces configuration processes of the access device, significantly simplifies the configuration of the access device, and reduces network maintenance costs.

In one embodiment, a system includes processor; and logic integrated with and / or executable by the processor, the logic being adapted to: assign a VLAN type to each of a plurality of VLANs of an architecture; generate a VLAN list type-length-value (vTLV) message; and transmit information to resources based at least in part on the vTLV message, wherein the resources comprise at least one virtual switch and one or more of: at least one physical switch; at least one virtual port; at least one physical port; at least one virtual machine; at least one converged network adapter (CNA); and at least one fibre channel forwarder (FCF).