2332 results about "System time" patented technology

A networked system is provided for transporting digital media packets, such as audio and video. The network includes network devices interconnected to send and receive packets. Each network device can receive and transmit media signals from media devices. A master clock generates a system time signal that the network devices use, together with a network time protocol to generate a local clock signal synchronised to the system time signal for both rate and offset. The local clock signal governs both the rate and offset of the received or transmitted media signals. The system, which can be implemented using conventional network equipment enables media signals to be transported to meet quality and timing requirements for high quality audio and video reproduction.

Said invention provides a mobile telephone time autocorrection method. It contains signal reception / transmitting unit, time signal sampling unit memory unit, central processing unit and display unit, said method mainly setting mobile telephone initial time, time adjustment cycle, and standard time source connection mode and time request , when need proceeding time correction, said mobile telephone automatically transmitting time request to standard time source and taking standard time then configuring said standard time as system time of mobile telephone to reach higher time precision by using normal quartz oscillator.

A computer dispatcher connected to one or more respective network buffers has stored file lists that identify one or more of the files in the database that are to be transmitted over networks connected to the respective network buffer. A scheduler(s) schedule one or more portions of one or more of the files to be written to the respective network buffers by defining transmission criteria about each of the files in the file list. These transmission criteria include a quantity to transmit criteria, defining a quantity of one or more of the portions of the respective file to transmit, and one or more release times. The release times define the time at which the respective portion is to be written to the network buffer. The system includes a dispatching process that determines an available space on one or more of the network buffers and a current system time. The dispatching process determines if the system time is greater than or equal to one of the release times and further takes a minimum value of the available space and the quantity of the respective portion. The dispatching process then writes the minimum value of the respective portion to one or more of the network buffers. A feedback mechanism, e.g. a quantity completion measure, is used to estimate a completion time of the writing of the respective portion to the respective network buffer. The scheduler then reschedules one or more of the portions if one or more of the portions can not be scheduled to meet the respective transmission criteria.

A method and an apparatus for augmenting timing synchronization in a base station using backhaul network frequency synchronization are provided. When in a first mode an external time epoch reference synchronized with system time is used to synchronize the base station to system time. When in a second mode a network frequency reference recovered from a backhaul network link is used to maintain the timing synchronization.

A system for assessing the state of an RF network includes a plurality of wireless devices coupled to the network and having one or more associated antennae, the wireless devices configured to process data received from a plurality of RF elements within range of the antennae. An RF switch is coupled to the network and configured to receive the data and transmit the data over the network. A first memory within the RF switch is configured to store a system state comprising a plurality of performance indicators, wherein each of the performance indicators is associated with an operational characteristic of one or more of the plurality of wireless devices. A second memory within the RF switch is configured to store a plurality of labeled data entries, the labeled data entries each including the system state and a user-entered identifier, wherein the user-entered identifier includes information related to the time at which the system state was selected. A display coupled to the network is configured to display a comparison of the system states.

Method for establishing wireless networks between devices is disclosed. When a first device is activated to establish a wireless network with other devices, a first activation reference time is recorded. At least one second device that has at least one compatible networking capability is searched for and identified. When the second device is activated to establish wireless network with other devices, a second activation reference time also is recorded. The first and second activation reference times are compared to determine whether they fall into the same time window. The offset between the system time of the first device and that of the second may be factored into the calculation to further enhance the accuracy. If the first and second activation reference times are in the same time window, the authentication of wireless network is established between the devices.

The invention relates to the field of commutation and discloses an authentication and key negotiation method, an authentication method, a system and a device, which leads a user card to be capable of resisting the playback attack during the process of an AKA under the situation of not supporting SQN storing. In the invention, when a network side receives the authentication request of a terminal, a random number, a first sequence number SQN1 and a first authentication code MAC are sent to the terminal according to the shared key, the random number and the first authentication code MAC generated by the first sequence number SQN1, the first authentication code MAC represents the current system time at the network side; if a second authentication code XMAC is the same as the first authentication code MAC, and the difference value of a second sequence number SQN2 representing the current system time at the terminal side and the first sequence number SQN1 meet a preset condition, the terminal determines the network side legal according to the key shared with the network side, the received random number and the first authentication code MAC generated by the first sequence number SQN1.

A method of synchronizing decoders within a network to a server includes receiving a set of timestamps and local clock signals upon receiving the beacon interrupt signal, computing differential timestamp and local clock values based on values of timestamp and local clock signals, respectively, within the sets of timestamp and local clock signals, determining whether the differential local clock value has a predetermined relationship with the differential timestamp value, and transmitting a clock rate adjustment command signal to the decoder when differential local clock value does not have the predetermined relationship with the differential timestamp value. The clock rate adjustment command signal adjusts the local system time clock of the decoder such that a subsequent differential clock value will have the predetermined relationship with the differential timestamp value. When this method is performed for each decoder within the network, the decoders are substantially synchronized and the decoding delay can be kept below humanly perceptible levels.

An envelope tracking power amplifier system time-aligns a supply voltage to an input signal to a power amplifier. The power supply operates in a static mode for low amplitude input signals and operates in a dynamic mode for high amplitude input signals. In the static mode, the power supply produces a substantially constant supply voltage independent of the amplitude of the input signal. In the dynamic mode the power supply produces a dynamically varying envelope tracking supply voltage based on the amplitude of the input signal. A first delay is determined based on portions of the input and output signals captured during static operation of the power supply and a second delay is determined based on portions of the input and output signals captured during dynamic operation. A delay mismatch is estimated based on a difference between the first and second delays.

It has been discovered that system operational characteristics (e.g., power level, clock frequency, processor utilization, operating system time slice utilization, size and age of queued jobs) may be used to predict storage access requirements for the system. By predicting the storage access requirements of a system, a storage subsystem may be advantageously controlled to anticipate storage accesses. A storage device or array of such devices can be configured to operate, for example, at selected speeds no greater than that required to process the predicted storage access requirements. The storage access prediction may be based, for example, on the frequency and voltage at which a processor is running or based on other system performance indicators such as job backlog and age and size thereof. Various controllable characteristics such as the speed of a hard drive's storage media, the current applied to a read/write head, etc., can be increased or decreased continuously or to discrete values in response to moving average indicators which provide advance warning of potential processing, and therefore potential storage access, swings.

A distributed simulation system is composed of simulator stations linked over a network that each renders real-time video imagery for its user from scene data stored in its data storage. The simulation stations are each connected with a physics farm that manages the virtual objects in the shared virtual environment based on their physical attribute data using physics engines, including an engine at each simulation station. The physics engines of the physics farm are assigned virtual objects so as to reduce the effects of latency, to ensure fair fight requirements of the system, and, where the simulation is of a vehicle, to accurately model the ownship of the user at the station. A synchronizer system is also provided that allows for action of simulated entities relying on localized closed loop controls to cause the entities to meet specific goal points at specified system time points.

A solid state disk (SSD) caches disk-based volumes in a heterogeneous storage system, improving the overall storage-system performance. The hottest data blocks are identified based on two factors: the frequency of access, and temporal locality. Temporal locality is computed using a logarithmic system time. IO latency is reduced by migrating these hottest data blocks from hard-disk-based volumes to the solid-state flash-memory disks. Some dedicated mapping metadata and a novel top-K B-tree structure are used to index the blocks. Data blocks are ranked by awarding a higher current value for recent accesses, but also by the frequency of accesses. A non-trivial value for accesses in the past is retained by accumulating the two factors over many time spans expressed as a logarithmic system time. Having two factors, access frequency and the logarithmic system time, provides for a more balanced caching system.

The invention relates to a real-time synchronization method based on PTP precision clock synchronization protocol of IEEE1588. The research on hardware of IEEE1588 protocol is still a blank at present. The method of the invention includes the following steps: sending messages; receiving messages; correcting the local system time; selecting the optimal master clock. And the synchronization action is different when the corresponding equipment is a master clock or a slave clock. The hardware method reduces the inherent fluctuation of data transmission time of internet technology, while not affecting the scope of precision control, thus resolving the problem of the clock uniformity and precision in a distributed network system.

Techniques are described herein that may be used to invalidate all entries in a table. For example, the table may be a flow cache. For example, an expiry time may be associated with one or more entries in the table. The expiry time of an entry may be initially set to the sum of the system time, the expiry time of the protocol associated with the entry, and a global time variable. To check if the entry is expired at any time, the current system time may be added to the global time variable and if the result is greater than the expiry time in the entry, then the entry is expired. To invalidate all the entries, the global time variable may be incremented by a large amount which may equal the maximum expiry time of all protocols. This may cause all entries to expire. New entries may be added using the new incremented value of the global time variable and will hence not expire.

The invention discloses a push message processing method and a mobile terminal. The system comprises a receiving module (1), a CPU (2), a storage module (3) and a display module (5). The receiving module (1) is used for receiving push messages of a server terminal. The CPU is used for obtaining the current time (T0) of the system when no-disturbing of the system is determined to be in a started state, comparing the system time (T0) with a no-disturbing time segment (T1-T2) set by no-disturbing of the system and executing a corresponding order according to a comparison result. The storage module (3) is used for temporarily storing the push messages received by the receiving module (1) when the CPU (2) determines that the system time (T0) is within the no-disturbing time segment (T1-T2). The display module (5) is used for displaying the push messages received by the receiving module (1) when the CPU (2) determines that the system time (T0) is not within the no-disturbing time segment (T1-T2). By means of the push message processing method and the mobile terminal, a user is shielded from disturbance by a ring tone or vibration along with the push messages during the preset no-disturbing time segment.

A digital video processor and operating method for a receiving raw audio and video data representing images and sound to be played. The processor includes a demultiplexer for receiving the raw audio and video data and providing demultiplexed audio and video data to a memory. A first system time clock provides first time values in response to being continuously clocked by the demultiplexer. A CPU decodes and plays back the audio and video data as a function of the audio and video PTS values. The processor further includes a second system time clock providing second time values in response to being periodically incremented by the CPU. The CPU periodically sets the second system time clock to a second time value equal to a current first time value of the first system time clock in response to a standard play mode, and the CPU periodically sets the first system time clock to a first time value equal to a current second time value of the second system time clock in response to a trick play mode.

Time-of-flight mass spectrometer instruments are disclosed for monitoring fast processes with large dynamic range using a multi-threshold TDC data acquisition method or a threshold ADC data acquisition method. Embodiments using a combination of both methods are also disclosed.

The invention provides a software time synchronization method for a position and orientation system (POS). The POS comprises an inertial measurement unit, a POS navigation computer, a GPS (Global Positioning System) receiver and the like. The time synchronization method comprises the following steps of: firstly synchronizing system time of the POS navigation computer to world coordinated time by using a GPS second pulse sent by the GPS receiver and a time counter; and synchronizing the data acquisition time of the inertial measurement unit with the world coordinated time through a method of correcting a frequency division period of a data acquisition pulse clock of the inertial measurement unit so as to complete the time synchronization of the POS. In the invention, the problem of reducing of synchronization accuracy of the POS in a short time due to the clock drift is solved through the method of changing the frequency division period of the data acquisition pulse clock, and the software time synchronization method has the characteristics of high accuracy and high anti-interference capacity.

A system and method in which a Radio Link Failure, RLF, report from a User Equipment, UE, provides system time-based timestamps to enable a source node to correctly analyze the real cause of an RLF associated with a handover. The timestamps are provided for the latest fulfillment of each event-specific entering condition associated with a handover-triggering event and for the occurrence of the RLF. The recorded timestamps are sent as part of RLF-reporting information to be forwarded to the source node to assist the source node in adjusting event-specific threshold(s) as well as other non-threshold related handover parameters such as the Time To Trigger, TTT, period, the time delay between a UE's transmission of its Measurement Report and the source node's transmission of the handover command, and the like, to reduce similar RLFs in the future. The generation of timestamps does not waste the UE's processing resources or battery power.

The invention discloses a synchronization method of a mobile phone streaming media audio and video, comprising the steps as follows: the received audio and video data packet is registered into the buffer area of a mobile phone terminal to carry out framing and sorting; when the audio data packet is decoded by a decoder, the difference value between system time when the audio data packet is sent to the decoder and time stamp of the audio frame of the audio data packet is recorded to be taken as a reference time offset value; the decoding and sending display time of the video data packet can be determined according to the reference offset value, so as to realize the synchronous playing. As the synchronization proposal before the audio and video decoding is adopted, more particularly, the reference time offset value is corrected by the audio and video decoding time compensation time, the time offset of the audio and video data flow caused by the equipment in the process before the transmission and decoding is effectively solved, the restriction that the decoded audio and video data flow can not be operated by certain techniques of the current mobile phone terminals and the used decoder is broken down, and the synchronous playing of the audio and video of the mobile phone is excellently realized.

A wireless access terminal, system and method for the wireless access terminal to synchronize to system times in a wireless communication system. A first timing hierarchy in a first wireless communication network is used to operate the wireless access terminal. The first wireless communication network has a first radio access technology. Operating with the first timing hierarchy includes determining a frame cycle for the first wireless communication network. The frame cycle has a frame cycle boundary. Broadcast parameters for a second wireless communication network having a second radio access technology different from the first radio access technology are received. The broadcast parameters include the system time of the second wireless communication network. The system time of second wireless communication network is aligned, from the perspective of the wireless access terminal, with the frame cycle boundary. The wireless access terminal engages in a communication session using the second wireless communication network.

Said invention provides a method to realize time shifting function sow in network interactive tv ( IPTV ), system obtaining data from multicasting stream and putting in buffer zone , real time scanning buffer zone marking key frame. It promises a current system time reference time reference between Set-top box and stream medium server. When user given off skip forward, skip backwards, dragging, playing after pause etc request, set-top box exiting multicasting group, transmitting ordering request to stream medium server which responses request from set-top box and calculating time reference and client request required playing time difference finding out beginning playing position in buffer zone, then stream medium server relevant playing according to user different request, said invention can effectively complete skip forward, skip backwards, dragging time shifting function.