Topic
Data rate units
About: Data rate units is a research topic. Over the lifetime, 725 publications have been published within this topic receiving 7240 citations.
Papers published on a yearly basis
Papers
Patent•
4 Jun 1991TL;DR: In this paper, the authors describe a servo-searched disk drive with a series of radially extensive servo sectors embedded within circumferential zones of data tracks.
Abstract: A miniature disk drive achieves storage densities of at least approximately 1700 tracks per inch per storage surface of a storage disk defining a series of radially extensive servo sectors embedded within circumferential zones of data tracks. The sectors are recorded at a constant data transfer rate while each zone has a data transfer rate adapted to disk radius. The drive includes a head and head positioner, a read preamplifier for amplifying analog signals read from, and for amplifying signals to be written to, a storage surface. A circuit board carries drive electronics including a read channel, a servo processing circuit for recovering head location information from the servo sectors, a data block sequencer for sequencing data blocks between a buffer and the storage surface, a buffer memory controller for controlling the buffer, a bus level interface circuit for transferring data blocks between the buffer and a host computer, and a programmed digital controller which functions within a head position servo loop and which also controls the sequencer, buffer controller and bus level interface circuit. As one feature, the servo sectors split data blocks into segments. Segment byte counts in each data block header are used by the sequencer automatically to assemble the segments into data blocks during read and to divide the blocks into segments during write. A single VLSI circuit including the sequencer, servo processing circuit, memory controller and an interface to the microcontroller is disclosed.
169 citations
Patent•
27 Apr 2005
TL;DR: In this paper, a data accessing apparatus 105 issues a parameter acquisition command to the recording medium and transmits the parameter to the receiving medium, which collates the received parameter with the data transfer efficiency required in the data to be written/read to select an optimum data size.
Abstract: [OBJECT] To guarantee a data transfer rate irrespective of a performance of a memory card [SOLVING MEANS] A parameter to show a data transfer efficiency is previously recorded in a recording medium 101 in which data is written per data size that can be increased and decreased stepwise and the data transfer efficiency is variable in accordance with the data size Next, a data accessing apparatus 105 issues a parameter acquisition command to the recording medium 101 The recording medium 101 which received the parameter acquisition command transmits the parameter The data accessing apparatus 105 collates the received parameter with the data transfer efficiency required in the data to be written/read to thereby select an optimum data size Then, the data accessing apparatus 105 writes/reads the data to the recording medium 101 based on the selected optimum data size
149 citations
Patent•
17 Dec 1996TL;DR: In this article, a radio link protocol (RLP) is used for transmitting data over the radio interface, and for acknowledging correct data frames and for retransmitting defective data frames.
Abstract: A digital mobile communication system has a high-speed non-transparent data connection between a transmitting and a receiving party (MS, TAF). For the data connection, parallel subchannels (ch1-chn), corresponding in number to the nominal data transfer rate, have been allocated on the radio interface. A radio link protocol (RLP) is responsible for transmitting data over the radio interface, and for acknowledging correct data frames and for retransmitting defective data frames. A transmission buffer (63) buffers the data frames to be transmitted and stores the data frames transmitted until it receives an acknowledgement of successful reception. In order to reduce interference and power consumption, user data is transmitted by using as many of the allocated subchannels as required by the actual user data rate at any one time. On the other allocated subchannels, transmission is interrupted or discontinuous transmission is activated.
149 citations
Patent•
31 Jul 2000
Abstract: The present invention may be regarded as a video recording system and method of transferring a non-time-critical, error-intolerant data segment stored or to be stored on a disk drive, which is responsive to a set of data transfer commands generated by a host processor and which is operating in a mode optimized for transferring time-critical, error-tolerant streaming data segments stored or to be stored on the disk drive. The method includes sending a sequence of data transfer commands generated by the host processor to the disk drive to transfer a respective sequence of time-critical, error-tolerant streaming data segments at a required data transfer rate. The method further includes selectively interposing a first data transfer command into the sequence of data transfer commands, the first data transfer command initiating a first transfer of the non-time-critical, error-intolerant data segment. The method further includes transmitting a data transfer error signal generated by the disk drive to the host processor, the data transfer error signal having a state that indicates whether any data transfer errors have occurred with respect to the first transfer of the non-time-critical, error-intolerant data segment. The method further includes selectively initiating host-processor-resident error recovery in response to the state of the data transfer error signal to achieve an accuracy required for the non-time-critical, error-intolerant data segment while maintaining the required data transfer rate of the sequence of time-critical, error-tolerant data segments.
127 citations
Patent•
22 May 2001TL;DR: In this article, an apparatus for transmitting a sequence of information bits and sequences of parity bits to a receiver in a transmitter of an HARQ transmission system is described. But it does not specify the transmission code rate.
Abstract: Disclosed is an apparatus for transmitting a sequence of information bits and sequences of parity bits to a receiver in a transmitter of an HARQ transmission system. A turbo encoder receives a sequence of L information bits, and generates the sequence of information bits and M sequences of L parity bits for the information bits, wherein M is determined depending on a transmission code rate. A redundancy selector includes the sequence of information bits in an initial data block during initial transmission, and uniformly includes non-transmitted parity bits out of parity bits provided from each sequence of the parity bits in a retransmission data block upon every receipt of a retransmission request from the receiver.
126 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 8 |
| 2020 | 15 |
| 2019 | 17 |
| 2018 | 15 |
| 2017 | 11 |
| 2016 | 17 |