148 results about "Distributed switching" patented technology

A system and method for delivering increases speed, security, and intelligence to wireline and wireless systems. The present invention increases channel capacity by using a parallel or multi-channel structure in such wireless and wireline at the edge or the core of. This new architecture of the present invention uses parallel bitstreams in a flexible way and distributed switching / routing technique, is not only to avoid the potential bottlenet of centralized switches, but also to increase speed with intelligence that is seamlessly integrating into the Fiber Optic Backbone such as WDM and SONET of the MAN / WAN network with a Real-time guarantees, different types of traffic (such as Stringent synchronous, isochronous, and asynchronous data messages) with different demands, and privacy & security of multi access and integrated services environment.

A switch encapsulates incoming information using a header, and removes the header upon egress. The header is used by both distributed ingress nodes and within a distributed core to facilitate switching. The ingress and egress elements preferably support Ethernet or other protocol providing connectionless media with a stateful connection. Preferred switches include management protocols for discovering which elements are connected, for constructing appropriate connection tables, for designating a master element, and for resolving failures and off-line conditions among the switches. Secure data protocol (SDP), port to port (PTP) protocol, and active / active protection service (AAPS) are all preferably implemented. Systems and methods contemplated herein can advantageously use Strict Ring Topology (SRT), and conf configure the topology automatically. Components of a distributed switching fabric can be geographically separated by at least one kilometer, and in some cases by over 150 kilometers.

A system and method for recording and / or otherwise monitoring IP multimedia sessions. The present invention features a recording and / or monitoring device, referred to hereinafter as “a recording device” for the purposes of clarity only and without any intention of being limiting. The recording device is a participant in the IP multimedia session, although preferably the recording device only receives data for recording and / or otherwise monitoring the session. Therefore, the IP multimedia session is preferably a multi-user session, such as a “conference call” for example, even if data is being provided for recording from only one of the participants in the session.

The present invention provides a central switch fabric timing subsystem and distributed switch fabric timing subsystems. Distributed switch fabric subsystems reduce the cost of a minimally configured network device by providing a network device with a distributed switch fabric. Such a network device locates a portion of the switch fabric functionality on each forwarding card allowing the minimal network device configuration to include less than the entire switch fabric functionality. The cost of the minimal configuration is, therefore, reduced allowing network service providers to more quickly recover the initial cost of the network device. As new services are requested, additional functionality, including both forwarding cards and universal port cards may be added to the network device to handle the new requests, and the fees for the new services may be applied to the cost of the additional functionality. Consequently, the cost of the network device more closely tracks the service fees received by network providers.

A system and method for recording and / or otherwise monitoring IP multimedia sessions. The present invention features a recording and / or monitoring device, referred to hereinafter as “a recording device” for the purposes of clarity only and without any intention of being limiting. The recording device is a participant in the IP multimedia session, although preferably the recording device only receives data for recording and / or otherwise monitoring the session. Therefore, the IP multimedia session is preferably a multi-user session, such as a “conference call” for example, even if data is being provided for recording from only one of the participants in the session.

The invention is an optoelectronic (OE) crossbar switch (10) for both digital and analog signals, used either separately or combined, whose functions are reconfigurable and distributed. The invention allows multiple senders to be connected with multiple receivers simultaneously. The invention uses optical filters for wavelength division multiplexing and demultiplexing (WDM and WDD). A single fiber module input / output port carries multiple bi-directional signals that are optically filtered out in the module using WDM / WDD filters (12) at each sender / receiver and then selected after optical filtering using photodiode detectors (15) as detectors and switches. Laser transmitters (14), photodiode detectors (15), and smart electronics (18) are used to implement the crossbar switch functions. In addition to optical filters, the use of time division multiplexing (TDM) and code division multiple access (CDMA) implemented either electrically or optically are taught to increase the number of independent users that the distributed switch handles. The switch can be cascaded with other switches using optical bridging circuits (100) to create a scaleable interconnect fabric. An arbitration technique can be used which allows signals to be sent only when the intended receiver is capable of accepting these signals.

A digital switching system comprises: (a) a line card layer containing a plurality of real or virtual line cards; (b) a switch card layer containing a plurality of real or virtual switch cards; and (c) an interface layer interposed between the line card layer and the switch card layer for providing serialization support services so that one or more of the line cards and switch cards can be operatively and conveniently disposed in a first shelf or on a first backplane that is spaced apart from a second shelf or from a second backplane supporting others of the line cards and / or switch cards. Such an arrangement allows for scalable expansion of the switching system in terms of number of lines served and / or transmission rates served. The flexibility of the system is owed in part to payload data being carried within payload-carrying regions of so-called ZCell signals as the payload data moves between the line card layer and the switch fabric layer.

A switch encapsulates incoming information using a header, and removes the header upon egress. The header is used by both distributed ingress nodes and within a distributed core to facilitate switching. The ingress and egress elements preferably support Ethernet or other protocol providing connectionless media with a stateful connection. Preferred switches include management protocols for discovering which elements are connected, for constructing appropriate connection tables, for designating a master element, and for resolving failures and off-line conditions among the switches. Secure data protocol (SDP), port to port (PTP) protocol, and active / active protection service (AAPS) are all preferably implemented. Systems and methods contemplated herein can advantageously use Strict Ring Topology (SRT), and conf configure the topology automatically. Components of a distributed switching fabric can be geographically separated by at least one kilometer, and in some cases by over 150 kilometers.

Method and apparatus for a distributed switching system supporting a plurality of services. A service request is initiated by an initiating customer. The service request is then executed using, for example, a user-to-network interface setup. A terminating setup is then performed to either accept or reject the requested service. Multiple service requests are correlated with respective services to enable at least one appropriate policy and logic. Data related to the requested service is obtained using at least one of a push procedure, a pull procedure, a query procedure, and a procedure in which requests are associated with the issuance of certificates

A switch encapsulates incoming information using a header, and removes the header upon egress. The header is used by both distributed ingress nodes and within a distributed core to facilitate switching. The ingress and egress elements preferably support Ethernet or other protocol providing connectionless media with a stateful connection. Preferred switches include management protocols for discovering which elements are connected, for constructing appropriate connection tables, for designating a master element, and for resolving failures and off-line conditions among the switches. Secure data protocol (SDP), port to port (PTP) protocol, and active / active protection service (AAPS) are all preferably implemented. Systems and methods contemplated herein can advantageously use Strict Ring Topology (SRT), and conf configure the topology automatically. Components of a distributed switching fabric can be geographically separated by at least one kilometer, and in some cases by over 150 kilometers.

A system and method for recording and / or otherwise monitoring IP multimedia sessions. The present invention features a recording and / or monitoring device, referred to hereinafter as “a recording device” for the purposes of clarity only and without any intention of being limiting. The recording device is a participant in the IP multimedia session, although preferably the recording device only receives data for recording and / or otherwise monitoring the session. Therefore, the IP multimedia session is preferably a multi-user session, such as a “conference call” for example, even if data is being provided for recording from only one of the participants in the session.

In a system having independently-clocked job-performing circuits (e.g., payload processors) and independently-clocked job-ordering circuits (e.g., request and payload suppliers), coordinating mechanisms are provided for coordinating exchanges between the independently-clocked circuits. The coordinating mechanisms include those that use transmitted time-stamps for scheduling contention-free performances within the job-performing circuits of requested jobs. The coordinating mechanisms additionally or alternatively include static and dynamic rate constraining means that are configured to prevent a faster-clocked one of the independently-clocked circuits from overwhelming a more slowly-clocked other of the independently-clocked circuits. In one implementation, independently-clocked telecommunication-shelves house a distributed set of line cards and switch cards. An asynchronous interconnect is provided between the independently-clocked shelves for carrying job requests and payload data between the distributed line cards and the distributed switch cards. The multi-shelf system is scalable and robust because additional or replacement line and switch cards may be inserted into one or another of the independently-clocked shelves as desired and because a unified clock-tree is not needed for synchronizing activities within the interconnected, but independently clocked shelves.

A method of integrating virtual and physical network switching components into a heterogeneous switching domain is provided. Such method including, attaching, by a switching device, a header to a packet received from a virtual machine, the header including domain information, and processing the packet by the switching device, the processing being controlled by the header. Finally, the packet is forwarded, the forwarding being controlled by the header.

Method and apparatus for a distributed switching system supporting a plurality of services. A service request is initiated by an initiating customer. The service request is then executed using, for example, a user-to-network interface setup. A terminating setup is then performed to either accept or reject the requested service. Multiple service requests are correlated with respective services to enable at least one appropriate policy and logic. Data related to the requested service is obtained using at least one of a push procedure, a pull procedure, a query procedure, and a procedure in which requests are associated with the issuance of certificates

The present invention provides a CPU message flow control method for distributed exchange router system. By utilizing real-time statistics of the number of various types of CPU message of current system in unit time said invention can monitor the flow quantity of various types of CPU mossage, and can judge that it has need of adopting message control measure to reduce flow quantity of CPU messageor not according to the message control flow threshold value. When the CPU message flow exceeds the CPU processing capacity, said invention can adopt a certain measure to reduce flow of CPU message.

A distributed memory switch system for transmitting packets from source ports to destination ports, comprising: a plurality of ports including a source port and a destination port wherein a packet is transmitted from the source port to the destination port; a memory pool; and an interconnection stage coupled between the plurality of ports and the memory pool such that the interconnection stage permits a packet to be transmitted from the source port to the destination port via the memory pool.

The invention discloses a conditional synchronization method for a media access control (MAC) address table entry of a distributed switch, and belongs to the field of communication. The method comprises the following steps that: a line card transmits a learned MAC address table entry to a master control; the master control judges whether the MAC address table entry is limited or is required to be synchronized, informs the line card which initiates the MAC address table entry learning to delete the MAC address table entry when judging that the MAC address table entry is limited and cannot be learnt, and informs the line card which learns the MAC address table entry to add the MAC address table entry and informs the line card which initiates the MAC address table entry learning to bring the MAC address table entry into effect when judging that the MAC address table entry is required to be synchronized; and during aging, the line card which initiates the MAC address table entry learning transmits aging information to the master control, and the master control processes the aging information and transmits the processed aging information to a corresponding line card to finish the aging of the MAC address table entry. By the method, the MAC address table entries between line cards of the distributed switch can be accurately and quickly synchronized, flooding of a unicast data message caused by asynchronism of the MAC address table entries is avoided, and the entries are saved to the greatest extent.

The invention discloses a switching network communication system, a switching network communication method and a main control panel. The system includes a main control panel, a distributed line card, a centralized line card and a switching unit; wherein the switching unit includes a distributed switching unit and a centralized switching unit; the main control panel is communicated with the distributed line card through the distributed switching unit and also communicated with the centralized line card through the centralized switching unit; the distributed line card and the centralized line card realizes data forwarding through the main control panel and the switching unit. The technical proposal disclosed by the invention can help reduce the cost of the switching network communication system.

Apparatuses and methods to manage a global forwarding table in a distributed switch are provided. A particular method may include managing a global forwarding table in a distributed switch. The distributed switch may include a plurality of switch forwarding units. The method may start a timer for an entry in the global forwarding table, and the entry may include a multicast destination address and corresponding multicast membership information. The method may also, in response to expiration of the timer of the entry, check at least one hit status to determine whether at least one switch forwarding unit of the plurality of switch forwarding units has forwarded multicast data to the corresponding multicast membership information of the multicast destination address of the entry. The method may further determine whether the entry is a cast-out candidate based on the hit status.

A method and system for providing a remote switching engine to monitor and control network traffic and utilizing appended word source address port mapping is provided. The system comprises a number of ports, at least one local switching device, at least one local forwarding database, and a remote switching processing device. The ports are provided for sending and receiving frames. The local switching device performs high-speed switching. The local forwarding database corresponds and couples to the local switching device, the database allowing the local switching device to look up a known address that has been previously obtained and forward the frames based on the known address. The remote switching processing device receives and processes frames from the local switching device(s). The local switching device(s) learns associations between Media Access Control (MAC) addresses and ports by having the local switching device forward unknown address frames to the remote switching processing device. The remote switching processing device update the local forwarding database corresponding to the local switching device based on the forwarded frames, utilizing the appended word source address mapping. The appended word of a frame transmitted from one switching device to another switching device has encoded within an ingress engine number and port number.

This invention describes a method for transmitting and forwarding packets over a switching network using time information. The network switches maintain a common time reference, which is obtained either from an external source (such as GPS—Global Positioning System) or is generated and distributed internally. The time intervals are arranged in simple periodicity and complex periodicity (like seconds and minutes of a clock). A data packet that arrives to an input port is switched to an output port based on its order or time position in the time interval in which it arrives at the switch. The time interval duration can be longer than the time duration required for transmitting a data packet, in which case the exact position of a data packet in its forwarding time interval is predetermined.This invention provides congestion-free data packet switching for data packets for which capacity in their corresponding forwarding links and time intervals is reserved in advance. Furthermore, such data packets reach their destination, which can be one or more (i.e., multicast) in predefined time intervals, which guarantees that the delay jitter is smaller than or equal to one time interval.

In a system having independently-clocked job-performing circuits (e.g., payload processors) and independently-clocked job-ordering circuits (e.g., request and payload suppliers), coordinating mechanisms are provided for coordinating exchanges between the independently-clocked circuits. The coordinating mechanisms include those that use transmitted time-stamps for scheduling contention-free performances within the job-performing circuits of requested jobs. The coordinating mechanisms additionally or alternatively include static and dynamic rate constraining means that are configured to prevent a faster-clocked one of the independently-clocked circuits from overwhelming a more slowly-clocked other of the independently-clocked circuits. In one implementation, independently-clocked telecommunication-shelves house a distributed set of line cards and switch cards. An asynchronous interconnect is provided between the independently-clocked shelves for carrying job requests and payload data between the distributed line cards and the distributed switch cards. The multi-shelf system is scalable and robust because additional or replacement line and switch cards may be inserted into one or another of the independently-clocked shelves as desired and because a unified clock-tree is not needed for synchronizing activities within the interconnected, but independently clocked shelves.

The invention discloses a flow controlling method, which is used in a distributed exchange system. The method includes the steps that a receiving terminal receives status and outgoing flow information of each sending terminal, the receiving terminal determines the distributed band width of each sending terminal according to the status and outgoing flow information received; and each sending terminal controls the flow between the self and the receiving terminal according to the distributed band width determined by the receiving terminal. The invention discloses further a flow controlling system and a flow controlling device. By use of the invention, rationality of the band width distribution can be improved, thus the band width resource can be fully and rationally utilized.

The invention relates to a distributed switch system based on an xen virtualization platform and an achieving method thereof. The distributed switch system is included in a cloud platform system and comprises a management node, a network switch, a management node I, an optical fiber switch and a sharing storage. The management node, the network switch, the management node I, the optical fiber switch and the sharing storage are sequentially connected. The system combines an open-source virtual switch (for short ovs) and achieves the distributed switch on a plurality of physical nodes, a virtual machine can shift among a plurality of physical resource main machines or store vlan information after startup and shutdown, and a network still conducts communication normally.

In a distributed switching environment, a plurality of switches are clustered together to form a stack, and it is generally desirable for forwarding tables, such as MAC tables, to be synchronized so that their mappings are consistent. When a switch receives a packet having a source address (e.g., MAC address) that is unknown, the switch is configured to disseminate the source address to the other switches of the stack. Rather than using software protocols to disseminate the source address, the switch instead transmits a multicast packet that (1) includes the unknown source address and (2) spoofs the other switches into believing that the packet was received on the same port from which the unknown source address was received on ingress to the stack. Thus, the other switches learn the unknown source address in hardware without having to rely on software for updating their forwarding tables.

Processing techniques in a network switch help reduce latency in the delivery of data packets to a recipient. The processing techniques include internal cut-through. The internal cut-through may bypass input port buffers by directly forwarding packet data that has been received to an output port. At the output port, the packet data is buffered for processing and communication out of the switch.

Techniques for improving the performance of flow control mechanisms such as Pause are provided. The techniques provide for maintaining a fair distribution of available bandwidth while also allowing for fewer packet drops, and maximizing link utilization, in a distributed system. For example, in one embodiment, techniques are provided for achieving a fair share allocation of an egress port's bandwidth across a plurality of ingress ports contending for the same egress port.

A system and method are provided for routing information in a multi-node network. In one embodiment of a multi-node network comprising a plurality of distributed switching nodes, a method is implemented in at least one of the plurality of nodes for routing information entering the node over a first channel to one of a plurality of other channels. The method comprises obtaining priority information for the information, ascertaining a remaining communication length for the information for each of the plurality of other channels, determining a current demand for each of the plurality of other channels; and routing the information entering at the first channel to one of the other channels based upon an evaluation that considers a combination of the obtained priority information, the ascertained communication length for each of the plurality of other channels, and the current demand for each of the plurality of other channels.