Abstract: An apparatus for coordinating radio activities in different radio access technologies (RATs) is provided. A first RAT module performs a first channel activity, related to a first RAT, for transmitting or receiving information to or from a first cellular network by using an antenna, and requests that a measurement activity, related to the first RAT, is to be performed for measuring signal power of a serving cell and/or at least one neighbor cell in the first cellular network by using the antenna. A second RAT module requests that a second channel activity, related to a second RAT, is to be performed for transmitting or receiving information to or from a second cellular network by using the antenna. An arbiter schedules performance of the measurement activity between the first and second channel activities.

Abstract: An electronic device capable of performing automatic frequency control (AFC) to maintain frequency and timing without good received bursts, in which an oscillation unit and a baseband processing unit are provided. Wherein, the baseband processing unit computes a compensation adjustment according to a prediction model and stored information regarding a previous digital value adjustment when detecting that the baseband processing unit is incapable of controlling the oscillation unit according to received bursts from the remote communication unit, and adjusts the oscillation unit according to the determined compensation adjustment.

Abstract: An communications apparatus with multiple radio access technologies (RATs) is provided. A first RAT module transceives radio frequency (RF) signals in a first cellular network through the antenna. A second RAT module transceives RF signals in a second cellular network through the antenna. An arbiter receives a first and a second request from the first and second RAT module requesting permission to use the antenna for a first and a second channel activity, obtains a priority configuration for the first channel activity versus the second channel activity when the second channel activity collides with the first channel activity, and responds to one of the first and second RAT modules with an acknowledgement message and to the other of the first and second RAT modules with a rejection message based on the obtained priority configuration.

Abstract: An apparatus for coordinating radio activities of different radio access technologies (RATs) includes a first RAT module, a second RAT module and an arbiter. The first RAT module receives and transmits radio frequency (RF) signals from and to a first cellular network through an antenna, and synchronizes transceiving timings with the first cellular network using a first clock. The second RAT module receives and transmits RF signals from and to a second cellular network through the antenna, and synchronizes transceiving timings with the second cellular network using a second clock. The arbiter coordinates a first radio activity requested by the first RAT module and a second radio activity requested by the second RAT module to avoid radio activity collision by using a third clock.

Abstract: The invention is to provide a recording method of an optical disc drive, which first calibrates the write power with minimum recording speed, adjusts write powers for higher speeds, searches a blank area in a lead-out area of a disc to record with write powers for all speeds, read signals, deletes the speeds with bad recording quality, reserves the speeds with good recording quality as recordable speed, checks the required recording speed for the address of the recording data, searches the recordable speed equal to or smaller than the required recording speed, replaces the required recording speed with the searched recordable speed, records data with the searched recordable speed and corresponding write power to ensure quality.

Abstract: A reading method and a reading device for an optical disk drive, which reads data on a track of an optical disk, receives a host command to read required data, checks cache data, reads cache required data to respond to the command, sets the required data to a target track of the optical disk if no required data exists, calculates moving time for which an optical head is moved from a current position to the target track by way of track jumping and track skipping, respectively, compares the moving time for the track skipping and the track jumping with each other, selects one of the track jumping and the track skipping corresponding to the shorter one of the moving time, moves the optical head to the target track to read the required data and responds to the host command to enhance the reading efficiency.

Abstract: An apparatus for coordinating radio activities of different radio access technologies (RATs) includes a first RAT module, a second RAT module and an arbiter. The first RAT module receives and transmits radio frequency (RF) signals from and to a first cellular network through an antenna, and synchronizes transceiving timings with the first cellular network using a first clock. The second RAT module receives and transmits RF signals from and to a second cellular network through the antenna, and synchronizes transceiving timings with the second cellular network using a second clock. The arbiter coordinates a first radio activity requested by the first RAT module and a second radio activity requested by the second RAT module to avoid radio activity collision by using a third clock.

Abstract: An communications apparatus with multiple radio access technologies (RATs) is provided. A first RAT module transceives radio frequency (RF) signals in a first cellular network through the antenna. A second RAT module transceives RF signals in a second cellular network through the antenna. An arbiter receives a first and a second request from the first and second RAT module requesting permission to use the antenna for a first and a second channel activity, obtains a priority configuration for the first channel activity versus the second channel activity when the second channel activity collides with the first channel activity, and responds to one of the first and second RAT modules with an acknowledgement message and to the other of the first and second RAT modules with a rejection message based on the obtained priority configuration.

Abstract: An apparatus for coordinating radio activities in different radio access technologies (RATs) is provided. A first RAT module performs a first channel activity, related to a first RAT, for transmitting or receiving information to or from a first cellular network by using an antenna, and requests that a measurement activity, related to the first RAT, is to be performed for measuring signal power of a serving cell and/or at least one neighbor cell in the first cellular network by using the antenna. A second RAT module requests that a second channel activity, related to a second RAT, is to be performed for transmitting or receiving information to or from a second cellular network by using the antenna. An arbiter schedules performance of the measurement activity between the first and second channel activities.

Abstract: A backup method includes reading record information of an optical disc; when the reading operation fails, utilizing an optical disc drive to read backed up record information at a plurality of specified positions in the lead-out area; checking a status of a session as a preparation for following recording; utilizing the optical disc drive to record data into a session on the optical disc; updating record information of the optical disc to generate an updated record information when recording of the session is completed and simultaneously recording the updated record information including a TOC block within the lead-in area of the optical disc to a plurality of specified positions on the optical disc according to different data types of the record information to serve as backed up record information; and ending a recording operation of the session.

Abstract: A recovery method for recording to a write-once disc. The recovery method includes: sequentially reading data within a plurality of Data Control Blocks corresponding to respective sessions on the write-once disc; utilizing data included in the Data Control Blocks to establish address information corresponding to each closed session; determining whether the write-once disc is finalized or not according to existence of a lead-out zone; reading a TOC (table of content) block of a TOC area; utilizing the address information stored in a memory of an optical disc drive to recover the TOC block and then storing the TOC block into the memory of the optical disc drive as data of the TOC block prepared for the next recording operation when reading the TOC block fails and the write-once disc is not finalized; and completing the loading operation of the write-once disc to make the write-once disc enter a recordable status.

Abstract: The invention provides a reading method of an optical disc drive, which includes setting, reading, and decoding data, accumulating the error amount of the decoded data, setting to re-read the data when a reading failure occurs, adding one to the error amount, setting a low number of retry attempts for a high error amount and a high number of retry attempts for a low error amount based on the error amount, retrying to re-read the data if the number of retry attempts does not reach the predetermined number of retry attempts, and determining that the reading fails if the number of retry attempts reaches the predetermined number of retry attempts.

Abstract: A device and method for determining defect sectors on an optical disc receives writing commands and data by a processor, and saves the writing data in a memory. An error correction code (ECC) encodes the writing data into encoded digital signals, and the encoded digital signals form modulated digital signals by a modulation device which are saved back into the storage. The processor controls a pick-up head to write and read the modulated digital signals. A comparing unit generates a number of errors by comparing the modulated digital signals before and after writing. The defect sector is directly determined if the number of errors are low or high. The modulated digital signal is decoded to determine the defect sector based on the failure or success of decoding if the number of errors lie in the middle of the range.

Abstract: A reading method and a reading device for an optical disk drive, which reads data on a track of an optical disk, receives a host command to read required data, checks cache data, reads cache required data to respond to the command, sets the required data to a target track of the optical disk if no required data exists, calculates moving time for which an optical head is moved from a current position to the target track by way of track jumping and track skipping, respectively, compares the moving time for the track skipping and the track jumping with each other, selects one of the track jumping and the track skipping corresponding to the shorter one of the moving time, moves the optical head to the target track to read the required data and responds to the host command to enhance the reading efficiency.

Abstract: A back-up method for defective data includes: first writing a batch of data clusters on a user data area; reading the data clusters to check for defects; planning back-up positions on the back-up area; writing the correct data for the defective data clusters to form a batch of corresponding replacing blocks; reading the replacing blocks to check defects; planning back-up positions on the back-up area; and writing the correct data for the batch of replacing blocks in order until the rewritten replacing blocks do not contain defects.

Abstract: The invention discloses a method for rearranging back-up data, which first starts rearranging a back-up area when a rewritable optical disc is loaded, reads all available replacing blocks on the back-up area, rearranges the order of the replacing blocks based on the order of addresses of corresponding data blocks on the user data area, writes the rearranged replacing blocks into a planned area of the back-up area, and registers the corresponding information to finish the operation of rearrangement for rapidly reading data.

Abstract: A method for accessing defect management data includes reading the required data block in an optical disc when an optical disc drive receives a command, storing data in a first buffer area, caching the required defect management data from a data cache area; otherwise, reading the required defect management data from a defect management area of the optical disc, storing the required defect management data in a second buffer area, checking if the required defect management data is hot defect management data, copying the hot defect management data to the data cache area, replacing the defect data of the first buffer area with the required defect management data, and outputting the data of the replaced first buffer area to expedite the reading process.

Abstract: The invention is to provide a recording method of an optical disc drive, which first calibrates the write power with minimum recording speed, adjusts write powers for higher speeds, searches a blank area in a lead-out area of a disc to record with write powers for all speeds, read signals, deletes the speeds with bad recording quality, reserves the speeds with good recording quality as recordable speed, checks the required recording speed for the address of the recording data, searches the recordable speed equal to or smaller than the required recording speed, replaces the required recording speed with the searched recordable speed, records data with the searched recordable speed and corresponding write power to ensure quality.

Abstract: An electronic device capable of performing automatic frequency control (AFC) to maintain frequency and timing without good received bursts, in which an oscillation unit and a baseband processing unit are provided. Wherein, the baseband processing unit computes a compensation adjustment according to a prediction model and stored information regarding a previous digital value adjustment when detecting that the baseband processing unit is incapable of controlling the oscillation unit according to received bursts from the remote communication unit, and adjusts the oscillation unit according to the determined compensation adjustment.

Abstract: A method for adjusting recording power is provided. The addresses of changing recording velocity and section pause points are set. Then, the recording power in the inner circle is tested with the lowest rate, and the recording power on each high rate area is estimated. A required record data is recorded. Afterwards, whether the recording of the required record data is completed is determined. If confirmed, the recording process is terminated; otherwise, whether the recording velocity needs to be changed is determined. If confirmed, the recording is paused to change the recording velocity, otherwise, the recording process continues. The recording of required record data continues according to the estimated recording power and the recording power is tested to obtain an optimum recording power. Next, the recording power is adjusted to the optimum recording power to continue recording the rest of required record data, so as to enhance the recording quality.