Abstract:
Methods and wireless communication devices for access procedure enhancement are provided. The wireless communication device for access procedure enhancement includes a transceiver module and a communication protocol module. The transceiver module performs wireless transmissions and receptions. The communication protocol module receives a page message from a base station via the transceiver module, transmits at least one access probe via the transceiver module, and terminates the transmission of the rest of an access probe payload of the at least one access probe according to a termination criterion. Moreover, the access probe is transmitted using a transmission power which is lower than a first threshold, and the access probe is transmitted at a data rate lower than a second threshold.
Abstract:
A mobile device and information transmission method are provided. The information transmission method is applied to the mobile device in M2M communication and includes the steps of determining whether a base station and the mobile device support transmission of capability information of the mobile device by a General Extension Message; and determining whether the capability information of the mobile device is changed when the base station and the mobile device support transmission of the capability information by the General Extension Message, wherein when the capability information of the mobile device is changed, the changed capability information is tied up with a Registration Message and transmitted to the base station by the General Extension Message.
Abstract:
An emergency call apparatus is provided that includes an applications processor and a code division multiple access (CDMA) modem. The applications processor is configured to receive current location data and vehicle crash data from sensors disposed in an automotive vehicle, and is configured to automatically establish a voice connection with an emergency services center, and is configured to transmit the location and vehicle crash data to the emergency services center within a prescribed time period. The CDMA modem is coupled to the applications processor and is configured to format and transmit a plurality of protocol data units (PDUs) over a single traffic channel that includes both primary traffic corresponding to the voice connection and other traffic corresponding to the location and vehicle crash data.
Abstract:
Methods and wireless communication devices for access procedure enhancement are provided. The wireless communication device for access procedure enhancement includes a transceiver module and a communication protocol module. The transceiver module performs wireless transmissions and receptions to and from a network. The communication protocol module divides an access channel into a plurality of narrow band frequency division multiplexing (FDM) channels, groups a plurality of reverse link FDM access channels (R-FACH) into a plurality of R-FACH groups, determines whether a base station in a network supports an access probe. If yes, the base station joins at least one R-FACH group. The wireless communication device sends the access probe in a chosen R-FACH during each access procedure.
Abstract:
A reference voltage generating device including a reference voltage source, a charge supplying source, a first switch, a second switch, a charge storage unit and a logic unit is provided. First terminals of the first and second switches are respectively coupled to the output terminal of the reference voltage source and the charge supplying source. When a power on reset signal is received, the first switch is turned off and the second switch is turned on, such that the charge supplying source quickly charges the charge storage unit. When the output voltage is greater than or equal to the reference voltage, the first switch is turned on and the second switch is turned off, such that the reference voltage source maintains the output voltage to the reference voltage.
Abstract:
A system and method of enhancing transmission of highly detectable pilots (HDPs). At least one base station transmits at least one cellular signal in which each cellular signal includes repetitive HDP cycles. Each HDP cycle has a duration of N power control groups (PCGs) and includes an HDP period having a duration of M PCGs in which N is greater than M. Traffic and overhead channels are gated during each HDP period. An enhanced HDP symbol is transmitted during a selected HDP period for each set of X HDP cycles of each cellular signal. For single carrier configurations, only one enhanced HDP is transmitted at a time, or multiple HDPs are transmitted in different directions. Standard 1x pilots may be transmitted. The enhanced HDP may be a boosted standard 1x pilot or an additional standard HDP pilot. Multicarrier configurations are described with PCG or sub-chip and/or phase offsets.
Abstract:
An access network is wirelessly coupled to an access terminal. The access network comprises a plurality of communication modules, a transmitter and a channel estimator. The plurality of communication modules coupled to the access terminal and configured to transmit a plurality of signals. The transmitter coupled to the access terminal and configured to send an index which indicates number of the plurality of signals. The channel estimator, configured to adjust and modulate a channel state information into the plurality of signals.
Abstract:
A motion estimation method is provided. The method has the following steps of: determining a start searching point according to multiple neighboring macroblocks of a current macroblock, wherein the current macroblock corresponds to a searching window; determining a best candidate pixel according to a first line segment where the start searching point is located, and a second/third line segment above/beneath the first line segment; determining whether the best candidate pixel is located at the first line segment; if so, setting a candidate motion vector corresponding to the best candidate pixel as a first motion vector of the current macroblock; and if not, dynamically adjusting the second line segment or the third line segment in the searching window to update the best candidate pixel, and retrieving the first motion vector of the current macroblock corresponding to the updated best candidate pixel.
Abstract:
A mixing unit includes a baseband signal processing unit, a radio frequency (RF) signal processing unit and a mixing unit. The baseband signal processing unit receives or generates a baseband signal. The RF signal processing unit processes or outputs a RF signal. The mixing unit is coupled to the baseband signal processing unit and the RF signal processing unit to select and operate in an up-convert mode or a down-convert mode according to a control signal. When the mixer operates in an up-convert mode, the mixing unit mixes the baseband signal with a local oscillation signal to generate the RF signal and outputs the RF signal to the RF signal processing unit. When the mixer operates in a down-convert mode, the mixing unit mixes the RF signal with the local oscillation signal to generate the baseband signal and outputs the baseband signal to the baseband signal processing unit.
Abstract:
A mobile communication device configured for Machine-to-Machine (M2M) communications is provided. In the mobile communication device, a wireless module performs wireless transmissions and receptions to and from a service network, and a controller module receives a message with a Slot Cycle Index (SCI) only for the M2M communications from the service network via the wireless module and instructs the wireless module to monitor a paging channel according to the SCI only for the M2M communications.