170 results about "Fast packet switching" patented technology

Embodiments of a communication system, a method, and a device for use with the communication system are described. Communication between the devices in the communication system may be enabled by the method. In particular, nodes or devices (henceforth referred to as devices) in a network (such as an ad-hoc network) in the communication system may exchange a dynamic network context via communication with neighboring devices. These devices may use the dynamic network context to determine how network resources are shared during the communication, including performing context-aware packet switching of packets (including data packets) in an information flow.

In a secure fast packet switch having a plurality of input ports and a plurality of output ports, a method of determining which port in the plurality of output ports data that is received on one input port in the plurality of input ports is to be sent to, the method including the steps of determining a physical layer address of a sending node, determining a physical layer address of a receiving node, determining an input port in the plurality of input ports that the data was received on, determining if the physical layer address of the sending node and the physical layer address of the receiving node are an allowed combination, determining the magnitude of the node identification number of the sending node, determining the magnitude of the node identification number of the receiving node, obtaining outbound port information from a first predetermined location in a data structure stored in a memory if the node identification number of the sending node is greater than the node identification number of the receiving node, and obtaining outbound port information from a second predetermined location in the data structure stored in the memory if the node identification number of the sending node is less than the node identification number of the receiving node. Circuitry that carries out the method is also described along with an exemplary data structure.

A method and apparatus are disclosed that store sequential data units of a data packet received at an input port in contiguous banks of a buffer in a shared memory. Buffer memory utilization can be improved by storing multiple packets in a single buffer. For each buffer, a buffer usage count is stored that indicates the sum (over all packets represented in the buffer) of the number of output ports toward which each of the packets is destined. The buffer usage count provides a mechanism for determining when a buffer is free. The buffer usage count can also indicate a number of destination ports for a packet to perform a multicasting operation. Buffers can comprise one or more groups and each of the groups can comprise a plurality of banks.

The disclosure is directed to a power module that includes at least one power substrate, a housing arranged on the at least one power substrate, and a first terminal electrically connected to the at least one power substrate. The first terminal includes a contact surface located above the housing at a first elevation. The power module includes a second terminal including a contact surface located above the housing at a second elevation different from the first elevation, a third terminal electrically connected to the at least one power substrate, and a plurality of power devices electrically connected to the at least one power substrate.

A method that globally allocates resources of a communication system. A global fast scheduler receives global CQI information from UEs of a communication system. The global fast scheduler determines a resource allocation value and assigns a UE to any available cell site that is a member of the active set of the UE and which can service the UE in accordance with the determined resource allocation value.

Methods and apparatus are disclosed for an adaptive rate control mechanism reactive to flow control messages in a packet switching system and other communications and computer systems. Typically, a multiplicative increase and exponential decrease technique is used to throttle traffic. Backpressure feedback is used to calculate the initial rate at which to allow traffic after backpressure is deasserted. This reduces the probability of underrun of buffers (e.g., too little traffic being carried). The adjustment to the initial rate is made by measuring the time between the XON and XOFF in factor periods. Then a target XON time is subtracted. If the result is positive (i.e., the measured XON time was too long), the rate is multiplicatively increased (e.g., by a factor of two to the difference). If the result is negative (i.e., the measured XON time was too short), the rate is exponentially decreased (e.g., by the square root).

A system and a method are disclosed for enabling fast switching in a multimedia interface system having content protection. By using a partial port receiver to decode a portion of the input at input ports that are not being output to a multimedia sink, the design of the switching system is simplified and silicon costs are reduced. Additionally, the switching system and method reduces the switching delay by maintaining content protection signaling with all of the input ports. This eliminates the need for re-authentication when a new multimedia source is selected.

A packet switching system includes a forwarding processing unit determining a destination of an input packet by analyzing the input packet and outputting it as an output packet, the forwarding processing unit comprises an ingress interface card checking if the input packet has a sequential cyclic number and an egress interface card creating a sequential cyclic number and assigning it to the output packet.

A sink may be to used to process multimedia digital data. The sink may include a plurality of input ports, an output port, a switchably-enabled selector to select an input port from a plurality of HDMI input ports to couple to an output port, a control circuit to detect encrypted data in a channel of the input ports; and a plurality of decryption engines. Each of the decryption engines may be coupled to respective input ports to synchronize with a corresponding encryption engine of a data source after the control circuit detects encrypted data in the channel of the respective input port. Additional circuitry may be included to operate the sink in a power saving mode. Also, methods for processing the data in both power saving and non-power saving modes.

The packet switching system for transmitting and receiving a packet via a packet switching network 100, which comprises a plurality of routing tables (#0, #1, #2 . . . ), each of which has been generated by a unique routing policy, stored in the routing apparatuses deployed at the border, at the origin or at the end of the respective routing domains, an identifier (RTI) inserted in the packet to specify the routing tables, and an identifier changer to change a value of the identifier on the packet switching network 100. The routing apparatus selects one of the routing tables (#0, #1, #2 . . . ) according to the RTI in the received packet and transfers the packet to a destination that is specified by the selected routing table.

In a trunking-port network environment, a ticket assigner and a ticket distributor are included in a packet switch load balance device together to achieve an output load balance during the transmission process of packet switching. The ticket assigner assigns one of the tickets to a packet received by a logical port, and the ticket distributor determines which one of the physical output ports to transmit the packet according to the assigned ticket. In the transmission process, a load monitor dynamically adjusts the ticket distribution scheme used for the ticket distributor, and thus the load balance is optimized.

Whereas the network architecture for ATM-based access networks on the DSL forum has already been defined, work on Ethernet-based access networks is still in its infancy. The invention relates to a novel aggregation solution for use in Ethernet-based broadband access networks.

An apparatus includes an inverter including a high-side switch coupled to a low-side switch, the inverter generating a time-varying drive current from a plurality of drive control signals, a positive rail voltage, and a negative rail voltage wherein controlling the switches to generate the time-varying drive current produces a potential transitory overshoot condition for one of the switches of the inverter; a drive control, coupled to the inverter, to generate the drive control signals and to set a level of each of the rail voltages responsive to a plurality of controller signals; and a controller monitoring one or more parameters indicative of the potential transitory voltage overshoot condition, the controller dynamically adjusting, responsive to the monitored parameters, the controller signals to reduce a risk of occurrence of the potential transitory voltage overshoot condition.

Asynchronous optical data is aligned with synchronous convergence points in an optical packet switching system. The convergence points can be any place where data enters an optical packet switching element, buffer stage, switch fabric, etc. The arrival time for data approaching the convergence point is compared with a reference signal associated with the upcoming convergence point. The comparison is used to identify the amount of time-shift required to align the approaching data with the reference signal. Control information is derived according to the comparison and used to control an optical data aligner that synchronizes the data with the convergence point.

A packet switching system arbitrates between Virtual Output Queues (VoQ) in plural input buffers, so as to grant the right of transmitting data to a crossbar switch to some of the VoQs by taking both an output data interval of a VoQ and the queue length of a VoQ as parameters. The system suppresses the delay time of the segment of a VoQ having a high load, thereby preventing buffers from overflowing; and, also, the system permits a VoQ having a low load to transmit segments under no influence of the VoQ that has a high load and is just reading out the segment.

An apparatus includes an inverter including a high-side switch coupled to a low-side switch, the inverter generating a time-varying drive current from a plurality of drive control signals, a positive rail voltage, and a negative rail voltage wherein controlling the switches to generate the time-varying drive current produces a potential transitory overshoot condition for one of the switches of the inverter; a drive control, coupled to the inverter, to generate the drive control signals and to set a level of each of the rail voltages responsive to a plurality of controller signals; and a controller monitoring one or more parameters indicative of the potential transitory voltage overshoot condition, the controller dynamically adjusting, responsive to the monitored parameters, the controller signals to reduce a risk of occurrence of the potential transitory voltage overshoot condition.

An optical packet switching apparatus includes an optical packet switching apparatus, an optical transmitting apparatus, and an optical packet receiving apparatus. The optical packet transmitting apparatus includes a packet generator for generating a packet signal by adding the routing information to a received client signal, a BIP adding unit for adding BIP to the generated packet signal, and an electrical-to-optical converter for converting the packet signal, to which the BIP has been added, into an optical packet signal so as to be sent out. The optical packet receiving apparatus includes an electrical-to-optical converter for converting the received optical packet signal into an electrical packet signal, and a BIP comparison unit for detecting the error occurrence in the packet signal, based on the BIP added to the packet signal.

The present invention relate to a wireless communication systems and in particular relates to a wireless diversity scheme. Diversity techniques are well established and known to help in many situations but have generally been considered too complex to implement in a low cost terminal. In accordance with a first aspect of the invention, there is provided a wireless terminal receiver arrangement which has a diverse receiver. Continuous signal assessment and fast switching enables only those signals which contribute to an improvement in the quality of the signal to be switched in.