85results about How to "Significant overhead" patented technology

A storage device able to make a redundant write operation of unselected data unnecessary and able to optimize an arrangement of pages to a state having a high efficiency for rewriting, wherein the storage device has a first memory unit, a second memory unit having a different access speed from the first memory, and a control circuit, wherein the control circuit has a function of timely moving the stored data in two ways between the first memory unit and the second memory unit having different access speeds in reading or rewriting.

Systems and methods for clustered access to as many columns as possible given a particular ongoing query mix and a constrained amount of disk space is disclosed. A compressed database is split into group of columns, each column having duplicates removed and being sorted. Then certain groups are transferred to a fast memory depending on the record of previously received queries.

A method of synchronizing data transmission between a host computer system and a transmitter across an interface with variable delay or latency. The host computer system marks transition frames between successive transmission intervals and transfers the outgoing frames across the variable interface to the transmitter. The transmitter enqueues outgoing frames into one or more FIFO transmission queue(s) and processes the enqueued frames as appropriate for the communication protocol in use. Marked frames are detected as they reach the head of the appropriate transmit queue. In particular, while bypassing is not active, the transmitter transmits unmarked frames until the end of the current interval, or until there is insufficient time in the interval to transmit another frame or until a marked frame is detected. While bypassing is not active, the transmitter terminates transmission from the transmit queue when a marked frame is detected during each interval. While bypassing is active, the transmitter discards unmarked frames without transmission until a marked frame is detected. During each interval, the transmitter activates bypassing if a marked frame has not been detected and deactivates bypassing if a marked frame is detected while bypassing is active. The transmitter enables queue mark operation if a marked frame is detected while queue mark operation is not enabled. The transmitter increments a bypass counter each time an interval ends without detecting a marked frame, and disables queue mark operation if the bypass counter reaches a predefined limit.

A task synchronization mechanism operates on a global lock that is shared between processors an on local locks that are not shared between processors. The local locks are processor-specific locks. Each processor-specific lock is dedicated to a particular processor in the system. When shared access to a resource is required, a processor updates its processor-specific lock to indicate the processor is sharing the resource. Because each processor-specific lock is dedicated to a particular processor, this eliminates a significant portion of the memory bus traffic associated with all processors reading and updating the same lock. When exclusive access to a resource is required, the requesting processor waits until the count of all processor-specific locks indicate that none of these processors have a lock on the resource. Once no processor has a lock on the resource, exclusive access to the resource may be granted. By changing from a single lock to multiple processor-specific locks, significant performance benefits are achieved by eliminating the memory bus traffic associated with caching a single lock to multiple processors.

Rate matching and rate shaping methods and systems for managing data traffic on wireless channels are disclosed. Rate matching embodiments dynamically determine downlink video data transmission rates based on frame decoding deadlines and frame sizes. In addition, if the channel capacity cannot support the video data transmission rate, the rate matcher can adjust the video stream accordingly so that it is supportable by the channel capacity. In turn, rate shaping implementations can tailor the transmission rate shaping based on the state of the wireless data channel. Shaper operations can be specifically adapted to a saturated state of the wireless channel, to an unsaturated state of the wireless channel and to transitions between the unsaturated and saturated states.

Disclosed embodiments are directed to systems and methods for dynamic overprovisioning for data storage systems. In one embodiment, a data storage system can reserve a portion of memory, such as non-volatile solid-state memory, for overprovisioning. Depending on various overprovisioning factors, recovered storage space due to compressing user data can be allocated for storing user data and/or overprovisioning. Utilizing the disclosed dynamic overprovisioning systems and methods can result is more efficient utilization of cache memory, reduction of write amplification, increase in a cache hit rate, and the like. Improved data storage system performance and increased endurance and longevity can thereby be attained.

A method of allocating regions of memory including the steps of allocating a corresponding plurality of portions of memory for use by the process and marking regions of memory that are allocated with markers. A start of a region is marked with one of the markers and an end of a region is marked with a further one of the markers, the further one of the markers having a later relative time indication and marking a next allocated region. In response to determining that a region of allocated memory bounded by two of the markers is no longer required by the process, deleting an older of the two markers; and in response to detecting deletion of an oldest one of the markers, deallocating the region of memory up to a new oldest pending marker.

An optical signaling header technique applicable to optical networks wherein packet routing information is embedded in the same channel or wavelength as the data payload so that both the header and data payload propagate through network elements with the same path and the associated delays. The header routing information has sufficiently different characteristics from the data payload so that the signaling header can be detected without being affected by the data payload, and that the signaling header can also be removed without affecting the data payload. The signal routing technique can overlaid onto the conventional network elements in a modular manner using two types of applique modules. The first type effects header encoding and decoding at the entry and exit points of the data payload into and out of the network; the second type effects header detection at each of the network elements.

An optical signaling header technique applicable to optical networks wherein packet routing information is embedded in the same channel or wavelength as the data payload so that both the header and data payload propagate through network elements with the same path and the associated delays. The header routing information has sufficiently different characteristics from the data payload so that the signaling header can be detected without being affected by the data payload, and that the signaling header can also be removed without affecting the data payload. The signal routing technique can overlaid onto the conventional network elements in a modular manner using two types of applique modules. The first type effects header encoding and decoding at the entry and exit points of the data payload into and out of the network; the second type effects header detection at each of the network elements.

Virtual clusters are based upon virtual operating systems. The physical cluster includes a plurality of physical server nodes. Each physical server node includes a plurality of physical resources and a virtualizing subsystem. The virtualizing subsystem is capable of creating separate environments that logically isolate applications from each other. The separate environments are virtual operating systems. A virtual operating system is configured on each physical server node by defining properties of the virtual operating system. A virtual cluster is composed of a plurality of virtual operating systems that are on a plurality of physical server nodes. A cluster application runs on the virtual cluster. The virtual cluster presents the plurality of virtual operating systems that compose the virtual cluster to the cluster application such that the cluster application is isolated from any other virtual operating systems that compose other virtual clusters on the plurality of physical server nodes.

Methods and systems for providing voice and date services in a femtocell wireless network. The proposed approach integrates IWLAN architecture into femtocell architecture by introducing a gateway to serve both IWLAN and femtocell users. The proposed approach handles the voice and data in a different way so that it enhances the data handling efficiency while re-using existing MSC investment. The proposed approach carries the data traffic from a femtocell base station to the gateway in native IP packet, instead of encapsulating them in 3G data, thus enhancing the efficiency and performance for the data traffic. The data traffic can then be sent to GGSN or directly to packet data network. The approach tunnels voice traffic to MSC through the gateway as in conventional Iu-CS approach.

A method for authentication of a first client in communication with a second client via an authentication server is disclosed, such that the first client and the second client are authenticated to each other, and the authentication server is authenticated to both the first client and the second client. The ability of a client and an authentication server to generate a one-time-use key unique to the client for a given request, is used as the basis for authentication. The flow of requests and responses coupled with each client's unique one-time-use key, such as a one time use account number used to encrypt messages, results in all three entities, the two clients and the authentication server, mutually authenticating each other. The method effectively prohibits a “man-in-the-middle” attack, wherein an unauthorized entity tries to assume the roll of one of the two clients, or the authentication server.

An apparatus and method for renewal-based resource allocation in a Broadband Wireless Access (BWA) system are provided. A Base Station (BS) allocates resources to a Mobile Station (MS) by resource allocation information. It is determined whether the MS requires continuous resource allocation or whether the MS does not have transmission data temporarily, when a resource allocation duration for downlink resources allocated to the MS has expired. One of resource allocation termination, resource allocation renewal, and temporary resource lending to another MS is performed according to the determination. Information for updating the resource allocation information is transmitted to the MS.

Described embodiments improve the performance of a computer network via selectively forwarding packets to bypass quality of service (QoS) processing, avoiding processing delays during critical periods of high demand, increasing throughput and efficiency may be increased by sacrificing a small amount of QoS accuracy. QoS processing may be applied to a subset of packets of a flow or connection, referred to herein as “lazy” processing or lazy byte batching. Packets that bypass QoS processing may be immediately forwarded with the same QoS settings as packets of the flow for which QoS processing is applied, resulting in tremendous overhead savings with only minimal decline in accuracy. In case of backlog, packets may be collected together into an aggregated or ‘uber’ packet, with QoS processing applied based on a virtual size of the aggregated packet.

In a software distribution unit, a binary-code analysis unit determines a total set of insertion positions at which probes can be inserted into software. A binary-code change unit determines the population of insertion positions of probes to be inserted into the software and the number of insertion positions of probes to be inserted on a device basis. Then, the binary-code change unit selects, from the population, insertion positions of probes as many as the determined number of insertion positions and inserts the probes into the software at the selected insertion positions. A software distribution unit distributes, to the device, the software into which the probes are inserted. As a result, it is possible to reduce both a load on the device side and a load on the software developer side at the same time and to acquire uniform debug information without deviations.

A circuit arrangement and method for accessing slave units in a system on chip in a controlled manner, wherein an access of a master unit of the system on chip to one of the slave units is performed via a network-on-chip bus system using an access address, where a memory protection unit is integrated between the at least one master unit and the network-on-chip bus system, and access authorization of the master unit to a slave unit is checked by the memory protection unit by comparing the access address with specified address sections, and when an unauthorized access of the master unit to a slave unit is identified, the access address is modified by the memory protection unit such that the unauthorized access is terminated in the network-on-chip bus system.

Multiprocessor systems conducting operations utilizing global shared memory must ensure that the memory is coherent. A hybrid system that combines hardware memory transactions with that of direct messaging provides memory coherence with minimal overhead requirement or bandwidth demands. Memory access transactions are intercepted and converted to direct messages which are then communicated to a target and/or remote node. Thereafter the message invokes a software handler which implements the cache coherence protocol. The handler uses additional messages to invalidate or fetch data in other caches, as well as to return data to the requesting processor. These additional messages are converted to appropriate hardware transactions by the destination system interface hardware.