4651results about How to "Reduce congestion" patented technology

A method for controlling the storage of data among multiple regional storage centers coupled through a network in a global storage system is provided. The method includes steps of: defining at least one dataset comprising at least a subset of the data stored in the global storage system; defining at least one ruleset for determining where to store the dataset; obtaining information regarding a demand for the dataset through one or more data requesting entities operating in the global storage system; and determining, as a function of the ruleset, information regarding a location for storing the dataset among regional storage centers having available resources that reduces the total distance traversed by the dataset in serving at least a given one of the data requesting entities and/or reduces the latency of delivery of the dataset to the given one of the data requesting entities.

Model-order reduction techniques are described for RLC circuits modeling the VLSI layouts. A structured model order reduction is developed to preserve the block-level sparsity, hierarchy and latency. In addition, a structured and parameterized model order reduction is developed to generate macromodels for design optimizations of VLSI layouts. The applications are thermal via allocation under the dynamic thermal integrity and via stapling to simultaneously optimize thermal and power integrity.

A signal distribution system for distributing signals, such as for outdoor wireless networks, comprises a number of remote hubs, each of which can direct wireless signals to a number of antennas. The antennas are used to provide wireless service to the service users, such as mobile units, within their geographic coverage area. The remote hubs are connected to main hubs, which are usually located centrally. Each main hub can support a number of remote hubs. The main hubs are connected to a number of base stations (again usually located centrally) in a flexible and re-configurable manner using a switch matrix. Some remote hubs may also include switched matrices for a further level of signal routing.

A gateway server manages connections in a wireless local area network (WLAN). The gateway server provides context information, such as an IP address, that is stored after being previously allocated to a mobile device in a previous connection to the WLAN. The gateway server reassigns the IP address to the mobile device after it reconnects to the WLAN after a disconnection, thus providing seamless roaming for the mobile device from WLAN to WLAN (or subnets within one WLAN) without requiring the user of the device to re-register. The gateway server also provides cluster information (e.g., as part of the context information) for a mobile device making a new connection to the WLAN, such as access privileges associated with the cluster of users of the mobile devices. The gateway server also provides load balancing among two or more WLAN's by directing a newly connection mobile device to another WLAN (or subnet), if less congestion results.

A method for optimizing data transmission in a data transfer system is provided where the data transfer system includes a transmitting device that transmits data to a receiving device through a switch. The method includes monitoring data transfer congestion in a buffer of the switch. The monitoring includes marking the data when data transfer congestion is detected. If data transfer congestion is detected, the method includes marking an acknowledgement (ACK) data after the marked data is received by the receiving device. The method further includes transmitting the ACK data from the receiving device to the transmitting device. The method also includes adjusting a data transfer rate between the transmitting device and the receiving device based on data transfer congestion. Monitoring data transfer congestion includes marking the data according to a probability corresponding to a percentage of time that the buffer is full.

A network switch having a shared memory architecture for storing data frames includes configuration registers that are programmable by a host processor to adaptively adjust overflow buffer locations and flow control watermark levels based on monitored network traffic. The host processor allocates shared resources by setting memory configuration registers corresponding to an external memory, where the network switch uses the external memory for storing received data frames, Management Information Base (MIB) counter values, and output port overflow data. The host processor periodically reads the MIB counter values from the external memory, and adjusts flow control watermark levels or the memory configuration registers in the network switch based on rate-based network traffic derived from the MIB counter values. PCI burst transfers between the host processor and the external memory via the network switch ensure that stored data is not lost during reconfiguration of the external memory. The disclosed arrangement enables resources used by the network switch to be adjusted to minimize congestion by borrowing resources from network ports serving idle stations.

A proxy partition cache (PPC) architecture and a technique for address-partitioning a proxy cache consisting of a grouping of discrete, cooperating caches (servers) is provided. Client requests for objects (files) of a given size are redirected or reassigned to a single cache in the grouping, notwithstanding the cache to which the request is made by the load-balancing mechanism (such as a Layer 4 switch) based upon load-balancing considerations. The file is then returned to the switch via the switch-designated cache for vending to the requesting client. The redirection/reassignment occurs according to a function within the cache to which the request is directed so that the switch remains freed from additional tasks that can compromise speed.

A service advisor detects the availability of a wireless communication service, communication being consistent with one or more protocols (e.g., IEEE 802.11 MAC layer) each having a plurality of packet formats. The service advisor includes an interface, a receiver, and an engine. The interface couples the service advisor to a provided consumer electronics product-(e.g., a cell phone or personal digital assistant (PDA)) having an annunciator (e.g., a display, speaker, or vibrator). The receiver receives communication by scanning a plurality of channels. The engine, coupled to the receiver and to the product via the interface, recognizes in response to the communication, only a limited set of packet formats of the plurality of formats; determines, from a packet having a format of the set, indicia of an available service; and facilitates operation of the annunciator in accordance with the indicia of available service. Use of the available service by the product involves recognizing a packet format not included in the set. In one implementation, the provided product includes a transmitter for use of the available service. Power consumption by the product may be reduced when desired communication services are not available. Another service advisor discovers services for purposes of horizontal and vertical handover.

A method, program, system and apparatus perform dynamic load balancing of coverage areas in a wireless communication network. The dynamic load balancing is performed by evaluating cell congestion based on location information of subscribers in the wireless communication network, collecting network parameters related to the wireless communication network and altering network parameters based on the evaluated cell congestion. After the network parameter is altered, the coverage areas are narrowed. Improvements in cell congestion and quality of server are then determined based on the narrowing of the coverage areas. Altering of the plurality of network parameters and evaluating of the cell congestion are performed continuously until a target quality of service is achieved.

A device for regulating blood pressure between a patient's left atrium and right atrium comprises an hourglass-shaped stent comprising a neck region and first and second flared end regions, the neck region disposed between the first and second end regions and configured to engage the fossa ovalis of the patient's atrial septum; and a one-way tissue valve coupled to the first flared end region and configured to shunt blood from the left atrium to the right atrium when blood pressure in the left atrium exceeds blood pressure in the right atrium. The inventive devices may reduce left atrial pressure and left ventricular end diastolic pressure, and may increase cardiac output, increase ejection fraction, relieve pulmonary congestion, and lower pulmonary artery pressure, among other benefits. The inventive devices may be used, for example, to treat subjects having heart failure, pulmonary congestion, or myocardial infarction, among other pathologies.

An apparatus and method for controlling wireless communication signals is provided, in which a wireless transmitter in a communication network generates a signal carrying data for wireless transmission, and is capable of varying the data carrying capacity of the wireless transmission channel in response to the quantity of data received for wireless transmission. A monitor is provided to monitor the quantity of received data and the capacity of the communication channel is increased if the monitored quantity exceeds a predetermined threshold. The capacity of the communication channel can be varied by varying the level of modulation and/or by varying the level of code inserted into the data stream. The output power of the wireless transmission signal may be varied in response to the quantity of received data.

A device for regulating blood pressure between a patient's left atrium and right atrium comprises an hourglass-shaped stent comprising a neck region and first and second flared end regions, the neck region disposed between the first and second end regions and configured to engage the fossa ovalis of the patient's atrial septum; and a one-way tissue valve coupled to the first flared end region and configured to shunt blood from the left atrium to the right atrium when blood pressure in the left atrium exceeds blood pressure in the right atrium. The inventive device may include a biodegradable material that biodegrades to offset flow changes caused by tissue ingrowth. The inventive device may reduce left atrial pressure and left ventricular end diastolic pressure, and may increase cardiac output, increase ejection fraction, relieve pulmonary congestion, and lower pulmonary artery pressure, among other benefits.

The apparatus and methods described herein enable an operator to simultaneously collect images and spectroscopic information from a region(s) of interest using a multiple modality imaging and/or spectroscopic probe, configured as a catheter, endoscope, microscope, or hand held probe. The device may incorporate, for example, an ultrasonic transducer and a fiber optic probe to translate images and spectra. The apparatus and methods may be used in any suitable cavity, for example, the vascular system of a mammal.

In accordance with the present invention is provided, a method to assure node connectivity in an ad hoc wireless network comprising a wireless main controller, a plurality of wireless nodes having a plurality of neighboring nodes and a plurality of wireless links connecting the wireless main controller, the plurality of wireless nodes and the plurality of neighboring nodes. The proposed method includes, computing a composite threshold for each of a plurality of neighboring nodes of a plurality of nodes, assigning a mobility to each of the plurality of nodes based on the composite threshold for each of the plurality of neighboring node and using the mobility assigned to each of the plurality of nodes to assure node connectivity in the ad hoc network.

The present invention relates to the field of smart cars and automatic signaling of a vehicle's intent. The invention allows a driver to choose between manual or automatic signaling (turns, deceleration, acceleration) and a prominent feature is that the system is not cooperative and can be phased in over time, one car at a time and offer immediate benefits. Much of the prior art relating to newer automotive technologies relies on the use of cooperative technologies, such as transponders or beacons and the like, requiring all cars to equip in order to gain benefits. While this is technically achievable it is an institutional limitation, and therefore systems that do not rely on this extent of cooperation are more practical and can be introduced sooner. The invention has the capability of ensuring that many more cars on the road provide proper turn signals as well as acceleration and deceleration signals. This display of intent will lead to increased situational awareness for all drivers and will improve efficiencies on the roads leading to less congestion. Today, the car ahead may simply slow down leaving a following or approaching driver to wait and guess what is happening. With this invention the car ahead will declare its intentions in advance. The invention also allows for the broadcasting of the vehicles intentions over commercially available data links.

A method for allocating a processing resource among multiple inputs includes defining a sequence of multiplexing iterations, each such iteration including a first plurality of windows, each such window containing a second plurality of time slots. A respective weight is assigned to each of the inputs, and each of the inputs is allotted one of the time slots in each of a respective number of the windows in each of the iterations, the respective number being determined by the respective weight. Each of the inputs is then provided with access to the processing resource during the time slots allotted thereto.

A surgical retractor includes a plurality of cameras integrated therein. One such retractor includes a tubular retractor and an insert supporting said plurality of cameras can be disposed within a tubular retractor.

An earcup assembly 11 for a headset 10 comprising a housing having a first side adapted to engage the head of a user when in use and a second side opposite thereto. A recess provided in the second side of the housing receives and stores a battery. A battery door 14 is arranged to slidably engage the second side of the housing such that the battery door 14 may be moved between a first, open position in which the recess is accessible to a user and a second, closed position in which the recess is covered by the battery door 14. Preferably, the earcup assembly 11 includes active noise reduction circuitry. One or a pair of such earcup assemblies 11 may be arranged to form a headset 10, wherein the assemblies 11 are coupled to a headband 12 via yokes 13.

A system including: (a) a database of individual on-street parking spots, and individual off-street parking spots, each of the individual parking spots associated with a unique identifier (UID) and location coordinates; and (b) an off street spot management module in communication one or more external client devices, adapted to receive parking rules from an external client device operated by an owner of each of the individual off-street parking spots.

An earth station receives a return signal via more than one satellite link from a mobile terminal using TDMA. The earth station selects one or more of the satellite links for transmitting a forward signal on the basis of the quality of signal received via each link. The earth section allocates frequency channels to the mobile terminals according to their location on the surface of the earth, so that the propagation time to and from those mobile terminals which share the same frequency channel is approximately the same. The satellite includes an antenna which generates an array of beams which are individually pointed to fixed regions of the earth, until the elevation of the satellite relative to a fixed region falls below a minimum value, in which case the corresponding beam is redirected to a new area, while the other beams remain pointed at the corresponding fixed areas. In this way, beam-to-beam handover is reduced, while maintaining the boresight of the antenna pointing at the nadir.

A reticle of a projectile weapon aiming system such as a riflescope includes a primary aiming mark adapted to be sighted-in at a first selected range and further includes a plurality of secondary aiming marks spaced apart below the primary aiming mark. The secondary aiming marks are positioned to compensate for ballistic drop at preselected incremental ranges beyond the first selected range, for a selected group of ammunition having similar ballistic characteristics. Angles subtended by adjacent aiming marks of the reticle can be adjusted by changing the optical power of the riflescope, to thereby compensate for ballistic characteristics of different ammunition. In some embodiments, the reticle includes a set of windage aiming marks spaced apart along at least one secondary horizontal axis intersecting a selected one of the secondary aiming marks, to facilitate compensation for the effect of crosswinds on the trajectory of the projectile.

A method for providing congestion management within a virtual talk group includes facilitating communication within a virtual talk group between a plurality of endpoints of different communication networks. The method also includes monitoring a communication congestion level within the virtual talk group and tracking at least one priority characteristic for at least one endpoint of the plurality of endpoints within the virtual talk group. The method further includes detecting that the communication congestion level exceeds a congestion threshold and reducing the congestion level by executing at least one policy based on the at least one priority characteristic of the at least one endpoint.

A method for communicating navigation information includes receiving destination information from a user. The destination information comprises a desired destination of the user. The method includes determining a first route to the destination and communicating the first route to the user. The method includes monitoring position information of a plurality of vehicles and identifying an area causing traffic delay using the position information of the plurality of vehicles. The method also includes determining a second route to the destination to avoid the area and communicating the second route to the user.

A method and apparatus for establishing traffic priorities in an IP network connected with multiple communication sources is disclosed. Different types of packets such as voice packets and data packets are received for transmission over a single network access link. In order to assure quality voice transmissions, voice packets are given priority over data packets by limiting a transmission rate from a data input queue whenever voice packets are detected in a voice input queue. Different combinations of interleaved voice and data packets help to alleviate packet congestion while maintaining priority for voice packets. In one aspect of the invention, priority for voice packets is further accomplished by limiting the size of data packet frames. In some instances when no voice packets are awaiting transmission, data packets are transmitted at a maximum rate in order to make full use of the network access link bandwidth. The invention is particularly beneficial when implemented over cable and DSL network access links with slow upstream feed rates.