VIA TELECOM CO., LTD. Patent applications |
Patent application number | Title | Published |
20150346244 | DEVICES AND METHODS OF MEASURING GAIN OF A VOLTAGE-CONTROLLED OSCILLATOR - A voltage-controlled oscillator gain measurement system includes a voltage-controlled oscillator, a voltage detector, and a processor. The voltage-controlled oscillator, which is configured in a phase-locked loop circuit, generates an output signal with an output frequency according to a control signal. The control signal is generated according to the output signal divided by a scaling number. The voltage detector is configured to measure a voltage difference of the control signal. The processor adjusts the scaling number to generate an output frequency difference of the output signal, and obtains a reciprocal gain of the voltage-controlled oscillator by dividing the voltage difference by the output frequency difference. | 12-03-2015 |
20150244350 | MULTI-PHASE SIGNAL GENERATOR AND MULTI-PHASE SIGNAL GENERATING METHOD THEREOF - A multi-phase signal generator and a multi-phase signal generating method thereof. The multi-phase signal generator includes a signal generator, a first comparator, a second comparator and a logic operation circuit. The signal generator generates a periodic signal. The first comparator receives the periodic signal and respectively compares the periodic signal with a first reference voltage and a second reference voltage to generate a first output signal. The second comparator receives the periodic signal and compares the periodic signal with a first threshold voltage to generate a second output signal. The logic operation circuit performs logic operations on the first output signal and the second output signal so as to generate a plurality of first phase output signals. | 08-27-2015 |
20150244330 | AMPLIFIER APPARATUS AND SOFT-START METHOD THEREOF - An amplifier apparatus includes a differential input pair, a current source, and a load. The differential input pair includes first and second transistors, and an auxiliary transistor. A control terminal of the first transistor receives a reference voltage. A first terminal of the second transistor is coupled to the first terminal of the first transistor, and a control terminal of the second transistor receives an input voltage. A first terminal of the auxiliary transistor is coupled to a first terminal of the first transistor, a second terminal of the auxiliary transistor is coupled to a second terminal of the first transistor, a control terminal of the auxiliary transistor receives a control voltage, and a base terminal thereof receives a power supply voltage. The current source and load are respectively coupled to the first terminals and second terminals of the first and second transistors. | 08-27-2015 |
20140274065 | Apparatus and System for Multi-Mode Wireless Communication - A multi-mode controller (MMC) manages communications on a wireless device to provide interoperability between multiple radio access technologies (RATs) or radio access protocols. | 09-18-2014 |
20140219247 | LTE+CDMA 1X HYBRID - An apparatus for communicating over a circuit switched network and a packetized data network. The apparatus includes a packetized data modem, a circuit switched modem, and a hybrid processor. The packetized data modem is configured to communicate with the packetized data network over a packetized data radio link via a radio. The circuit switched modem is configured to communicate with the circuit switched network over a circuit switched radio link via the radio. The hybrid processor is configured to monitor a circuit switched sleep cycle and a packetized data sleep cycle, and is configured to direct the packetized data modem and the circuit switched modem to switch between the networks according to the sleep cycles by prioritizing communications with the circuit switched network above communications with the packetized data network. | 08-07-2014 |
20140146793 | APPARATUS AND METHOD FOR ACCESS PROBE HANDOFF - A mobile communication device for access probe handoff is provided. In the mobile communication device, a wireless module performs wireless transmissions and receptions to and from a first cellular station and a second cellular station, and a controller module configures the mobile communication device to operate in a selective retransmission mode, and detects that a signal quality of the first cellular station is less than a predetermined threshold during an access sub-attempt to the first cellular station via the wireless module. Also, the controller module hands off the mobile communication device from the first cellular station to the second cellular station in response to detecting that the signal quality of the first cellular station is less than a predetermined threshold, and clears a physical layer buffer and restarts a selective acknowledgement (SACK) operation for the selective retransmission mode after the handoff of the mobile communication device. | 05-29-2014 |
20140105137 | COMMUNICATION SYSTEM AND METHOD OF DATA TRANSMISSION FOR A MEDIUM ACCESS CONTROL LAYER - Communication system and method of data communication are provided. The method of data communication for a MAC layer includes initiating an access attempt; transmitting, by a mobile station, a probe to a base station (BS), wherein the probe includes header information and data frames; decoding the header information and the data frames; generating, by the BS, a SACK message; and transmitting the SACK message to the MS. | 04-17-2014 |
20140078984 | APPARATUSES, SYSTEMS, AND METHODS FOR ACCESS CONFIGURATIONS - A mobile communication device including a wireless module and a controller module is provided, and the mobile communication device is coupled to a cellular access station. The wireless module performs wireless transmissions and receptions to and from the cellular access station. The controller module determines whether a GAPM has been received from the cellular access station via the wireless module and whether the mobile communication device supports an EACH, and if so, performs Tx operations on the EACH using a random access procedure with a message duration, and otherwise, if not, performs the Tx operations on an ACH using the random access procedure. Particularly, the GAPM includes a maximum message duration and a minimum message duration over the EACH, and the message duration is not greater than the maximum message duration and not less than the minimum message duration over the EACH. | 03-20-2014 |
20140078963 | METHODS FOR ACCESSING TO BASE STATION THAT USES SACK MECHANISM AND APPARATUSES USING THE SAME - A method for a mobile station to access to a base station in a wireless communication system that uses selective acknowledgement mechanism, comprising: transmitting, an access probe from the mobile station to the base station, the access probe including a plurality of data frames; setting, a vector in the mobile station based on a message received from the base station, wherein the message indicates parts of the plurality of data frames in the access probe are not decoded by the base station; passing, the parts of the plurality of data frames that are not decoded by the base station from a MAC layer of the mobile station to a PHY layer of the mobile station according to the vector; and sending, by the mobile station to the base station, the parts of plurality of data frames that are not decoded by the base station. | 03-20-2014 |
20140078962 | METHODS FOR ACCESSING TO BASE STATION THAT USES SACK MECHANISM AND APPARATUSES USING THE SAME - A method for mobile station accessing to a base station in a wireless communication system that uses selective acknowledgement mechanism, comprising: transmitting, an access probe from the mobile station to the base station;
| 03-20-2014 |
20140078883 | METHODS FOR RETRANSMITTING REVERSE LINK DATA AND APPARATUSES USING THE SAME - A method for retransmitting reverse link data practiced by a media access control layer, the method comprising: buffering a plurality of data frames encapsulated in a first access probe in a memory; obtaining information regarding data frames encapsulated in the first access probe that are successfully decoded by a telecommunication network; selecting the buffered data frames that are required to be retransmitted, according to the obtained information; and passing down the selected data frames to a physical layer, to encapsulate the selected data frames into a second access probe and transmit the second access probe to the telecommunication network. | 03-20-2014 |
20110081926 | TRANSMISSION AND RECEPTION OF HANDWRITTEN DATA ON WIRELESS DEVICES WITHOUT CHARACTER RECOGNITION - A mobile device and associated method for transmitting a plurality of characters to a remote device without requiring keypad input or character recognition. The device is operable to receive characters entered by the user via handwritten input and transmit the characters without requiring character recognition. User input is received to a screen of the wireless handheld device, wherein the user input comprises handwritten text having a plurality of characters, e.g., in a non-Latin character set. Data corresponding to an image of the handwritten text may be compressed, packaged, and transmitted to a remote device in a wireless fashion. The compressed data is useable to create the image of the handwritten text on the remote device. The method preferably does not perform any character recognition on the handwritten text. | 04-07-2011 |
20090319854 | TRISTATE REQUESTS FOR FLEXIBLE PACKET RETRANSMISSION - Extending acknowledgement messages from two states to at least three states is described, whereby such messages constitute a packet quality indication (PQI) reflecting quality or usability of the received signal. In an HARQ system, a transmitting station can flexibly select a better alternative for the next information to transmit on the basis of such PQI. One aspect includes determining how best to correct an unsuccessful packet transmission based on quality information about the specific packet. Implementing apparatus and procedures are described. | 12-24-2009 |
20080285508 | Access terminal which handles multiple user connections - System and method for handling multiple connection requests between an Access Terminal (AT) and an Access Network (AN). The method may include receiving a first connection request. Connection request information regarding a number of connection requests may be updated based on receiving the first connection request. If there is not a currently active wireless connection, a connection may be established between the AT and the AN. If there is a currently active wireless connection, a notification may be sent indicating that the wireless connection between the AT and the AN has been established. A connection release request may be received. Accordingly, the update connection request information may be updated based on receiving the connection release request. If there is not a currently active wireless connection, the wireless connection between the AT and the AN may be closed. | 11-20-2008 |