52results about How to "Utilize bandwidth" patented technology

An OFDM/OFDMA frame structure technology for communication systems is disclosed. The OFDM/OFDMA frame structure technology comprises a variable length sub-frame structure with efficiently sized cyclic prefixes and efficient transition gap durations operable to effectively utilize OFDM/OFDMA bandwidth. Furthermore, the frame structure provides compatibility with multiple wireless communication systems. An uplink frame structure and a downlink frame structure are provided.

An integrated network switch having multiple network switch ports for outputting data frames also includes a dequeuing system for selectively supplying a data frame for output according to a specified priority by an output switch port. The dequeuing system includes, for each network switch port, a plurality of priority queues configured for holding assigned data frames based on respective priorities assigned by switching logic. A weighted round robin scheduler supplies the assigned data frames held in the priority queues to the output switch port according to a prescribed weighted round robin scheduling. In addition, the dequeuing system uses token bucket filters for selectively passing the assigned data frames to the respective priority queues in a manner that ensures that a given data frame having a large size does not interfere with bandwidth reserved for high-priority packets requiring guaranteed quality of service. Each token bucket filter selectively passes the corresponding assigned data frame to the corresponding priority queue based on a determined availability of at least a required number of tokens corresponding to a determined size of the corresponding assigned data frame. If the token bucket filter determines an insufficient number of tokens are available relative to the required number of tokens, the token bucket filter either drops the frame or shifts the frame to a lower priority queue. Hence, weighted fair queuing can be approximated using weighted round robin scheduling without interference by large-sized data packets.

Methods and apparatus are disclosed for dynamic bandwidth expansion for wireless clients of a wireless wide-area network (WWAN), wherein each client has an allocated bandwidth for communicating over the WWAN and the clients are within wireless signal reception of each other. The WWAN clients may voluntarily or in a predetermined manner join a pool of bandwidth-sharing clients. A wireless aggregation server and a wireless pool boss work in cooperation to utilize unused transmit and receive bandwidth from each of the pool members.

In order to efficiently utilize the limited transmission bandwidth of a communications network, e.g., a cable network, guide data for constructing an interactive program guide (IPG) is delivered to a set-top terminal using different methodologies. For example, the guide data associated with those programs which are likely of interest to a user is automatically provided piecemeal in a broadcast stream. The set-top terminal, along with other terminals, may retrieve from such a broadcast stream some or all of the guide data therein over time, which is cached in the terminal in anticipation of a user's invocation of an IPG. On the other hand, the guide data associated with those programs which are less likely of interest to a user is furnished upon request by the set-top terminal needing such guide data to realize an IPG desired by the user. In addition, guide data for each program may be divided into detail guide data providing details of the program (e.g., a synopsis of the program content), and grid guide data providing basic information about the program (e.g., title, channel and broadcast time). A first time window and a second time window may be defined such that the grid guide data associated with those programs broadcast within the first time window and the detail guide data associated with those programs broadcast within the second time window are automatically provided in the broadcast stream. The rest of the detail and grid guide data may be furnished upon request when needed.

A method for reducing cache memory misses in a computer that performs context switches between at least a first context and a second context. A First logic identifies a first prefetch region in a first memory element and a second logic identifies critical memory references within the first prefetch region during compilation of a computer program. The critical memory references within the first prefetch region correspond to data in cache memory if a context switch occurs from a process or thread associated with the second context to a process or thread associated with the first context during program execution. Third logic prefetches data associated with the identified critical memory references and stores the prefetched data in cache memory prior to a process or thread associated with the first context being resumed when a switch from the second context to the first context occurs during program execution.

A first issue is to provide a packet transfer device for identifying a connection such as a TCP connection linked to a bandwidth control means, and provide a proxy acknowledgment for each identified connection such as TCP. A second issue is to provide a packet transfer device for providing a proxy acknowledgment for a connection such as TCP, and capable of improving throughput such as for TCP just by being installed at a network edge section connected to the communication terminal. As a means to resolve the first issue, a packet transfer device is provided that contains a means for identifying flows such as TCP flows for deciding if the proxy acknowledgment means requires proxy acknowledgment or not, based on the bandwidth conformance flow reported from the bandwidth control means. As a means to resolve the second issue, a packet transfer device is provided that contains a means for converting stored packets to a protocol that does make a proxy acknowledgment, and a means for transmitting the converted packets to a packet transfer device installed on the network edge oriented towards the oncoming packets.

An optical device for combining optical signals of different wavelengths is described wherein an array of laser output beams are collimated, directed to propagate along a similar path, and coupled into an optical fiber through a single molded part. The single-part optical coupling module can be constructed in various ways to achieve the desired configuration. One example is a single plastic-injection molded part, containing mechanical alignment features, an array of collimating lenses, and a focusing lens housed within a fiber optic connector ferrule. The laser output beams are separately passed through separate radial sectors of the focusing lens.

The present invention discloses a ring bearing network and a method of implementing service bearing thereof; said ring bearing network comprises a plurality of network nodes and physical links or logical links connected the network nodes, designed to bear service data at different nodes in a manner of label switched path; said method of implementing service bearing based on said ring bearing network comprises: scheduling multi protocol label switching service data at the node onto said ring bearing network with a predetermined scheduling algorithm at the service source node; multiplexing the service data at different nodes in the same physical link or logical link in a manner of label switched path for transporting; scheduling the respective service data in said physical link or logical link off said ring bearing network at the service destination node. The present invention can make service processing in ring network simpler and more efficient, implement cross-ring service data interconnection and protection, and improve bandwidth utilization ratio of the rings.

The disclosure relates to a method for sending a message, an access router, and a data cache system. The method for sending a message includes: sending a data request received by the access router to a gateway node in the home routing area of the access router; receiving location information from the gateway node, where the location information identifies a data cache node obtained according to the data request, and obtaining information about the cost of routing from the access router to the data cache node according to the location information; and sending a data obtaining request to the data cache node, where the data obtaining request carries the routing cost information. The method for sending a message, the access router, and the data cache system provided herein utilize the radio bandwidth efficiently and improve the network throughput.

In a digital audio broadcast system, to utilize transmission bandwidth efficiently, representations of a stereo audio signal for transmission are generated in accordance with an inventive multidescriptive coding technique. The representations, as generated, are then transmitted through multiple communication channels, respectively. The transmitted representations are received by a receiver where one or more of the representations are selected for recovery of the stereo audio signal. Because of the design of the multidescriptive coding used, the more representations are selected to recover the stereo audio signal, the higher the quality of the recovered signal.

An asynchronous metropolitan packet transport ring having guaranteed QoS. Asynchronous packetized data flow in one direction through a fiber optic loop. A number of Metropolitan Packet Switches (MPS) are coupled to the fiber optic loop. An MPS allows packetized data from an upstream MPS to flow to a downstream MPS over a segment of the fiber optic loop. The MPS also puts packetized data onto and pulls packetized data off of the fiber optic loop. Thereby, flows can access the fiber optic loop via the MPS's. The MPS's also regulate the data rates on a per-flow basis according to setup information supplied by a Ring Management System (RMS). If one segment of the fiber loop becomes overly congested, the MPS guarantees quality of service for those flows by deallocating available bandwidth from flows upstream to the point of congestion. Utilization of packet transport ring capacity is optimized by allocating any bandwidth that becomes available to active flows according to a pre-specified weighting scheme.

Disclosed is a data transmitter including: a plurality of write tasks configured to transmit data in parallel to a receiver over a network; and a control task configured to control the plurality of write tasks so that the plurality of write tasks are operated in a fixed transmission rate operation mode or a variable transmission rate operation mode in which a transmission rate varies depending on network conditions. Thus, network bandwidth can be efficiently shared with cross traffic even when a parallel TCP stream is used.

A method, device and network for compressing cable modem data signals and conserving bandwidth within the network. Cable modems transmit upstream data signals to a fiber node which compresses the data signals and transmits the compressed signals upstream to a headend which decompresses the data signals. The fiber node compression may be by a shaping filter or a fast Fourier transform (FFT) function. The headend decompression may be by an inverse shaping filter or an inverse FFT function.

A system provides more cost and bandwidth efficient utilization of a SONET network having both a Working path and a Protection path by using both communication paths to carry data. A system for communicating data over a Synchronous Optical Network/Synchronous Digital Hierarchy, the system comprises an Optical Line Termination unit operable to interface with a plurality of Synchronous Optical Network/Synchronous Digital Hierarchy communication paths, and communicate different data on each of the plurality of Synchronous Optical Network/Synchronous Digital Hierarchy communication paths.

In a method of communicating in a radio frequency identification (RFID) system including a RFID reader and a plurality of RFID tags, a plurality of spread spectrum data are stored in the plurality of RFID tags. The plurality of spread spectrum data are transmitted from the plurality of RFID tags to the RFID reader. A plurality of original data respectively corresponding to the plurality of RFID tags are simultaneously extracted from the plurality of spread spectrum data at the RFID reader.

A method for negotiating bandwidth of a Data Communication Channel (DCC) automatically, including the steps of: performing a first communication channel configuration by two network elements respectively; informing, by the network element at transmitting end of the DCC, the network element at receiving end of the DCC of DCC negotiation message via the preconfigured communication channel; after receiving the DCC negotiation message, the network element at the receiving end comparing the overhead bytes contained in the DCC negotiation message with overhead bytes available to the network element at the receiving end, to obtain an intersection, which is overhead bytes, for constructing a DCC, available to both the network elements, wherein the overhead bytes as bandwidth of the channel are used to perform a second DCC configuration in the same order, so as to establish the DCC.