Abstract:
PROBLEM TO BE SOLVED: To achieve power savings by turning off all or some of the baseband processing for codes and timeslots that have not been transmitted due to full DTX. SOLUTION: When full DTX is detected by reception of a Special Burst (SB), the receiver is turned off for all timeslots and frames(step 20) for the duration of the Special Burst Scheduling Period (SBSP). The transmitter schedules transmissions following any idle period to start on the boundary of the SBSP. The receiver determines the SBSP and if the transmitter initiates transmissions according to SBSP by reception of several initial full DTX cycles. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
A method for multicasting a packet begins by providing a buffer for each of two user equipments (UEs) in communication with a base station. A determination is made whether there is a previously unsent packet at the base station. A second determination is made whether both UE buffers are non-empty. A non-empty buffer is flushed if there is no previously unsent packet and if one of the buffers is non-empty. A packet is selected to be transmitted if there is a previously unsent packet or if both buffers are non-empty. The buffers are updated based on feedback received from the UEs.
Abstract:
The present invention is related to a data backup device performing backup of data stored in a portable device (20) while charging a battery in the portable device. The present invention incorporates a data backup mechanism into a charger (10) and a portable device (20). When the portable device (20) is connected to the charger (10) for charging the battery of the portable device (20), the charger (10) automatically retrieves data in the portable device (20), and stores it in a non-volatile memory (16) of the charger. If a portable device is lost or malfunctions, or a new portable device is purchased, the data stored in the portable device can be easily recovered from the non-volatile memory (16).
Abstract:
A method for performing transport format combination indicator processing in a wireless communications system begins by collecting received samples for a timeslot (322). Processing of the received samples for the timeslot that does not require a transport format combination code list or TFC code list valid indicator is performed (342). Next, a TFCI value for the timeslot is received and is processed at the timeslot rate, producing the TFC code list and the TFC code list valid indicator (344). Then processing in the timeslot that requires the TFC code list or the TFC code list indicator is performed.
Abstract:
A secret stream of bits begins by receiving a public random stream contained in a wireless communication signal at a transmit/receive unit. The public random stream is sampled and specific bits are extracted according to a shared common secret. These extracted bits are used to create a longer secret stream. The shared common secret may be generated using JRNSO techniques, or provided to the transmit/receive units prior to the communication session. Alternatively, one of the transmit/receive unit is assumed to be more powerful than any potential eavesdropper. In this situation, the powerful transmit/receive unit may broadcast and store a public random stream. The weaker transmit/receive unit selects select random bits of the broadcast for creating a key. The weaker transmit/receive unit sends the powerful transmit/receive unit the selected bit numbers, and powerful transmit/receive unit uses the random numbers to produce the key created by the weaker transmit/receive unit.
Abstract:
A method and apparatus for controlling transmissions of data via an enhanced dedicated channel (E-DCH) are disclosed. A list of available transport format combinations (TFCs) is generated based on a plurality of dedicated channel medium access control (MAC-d) flows. An enhanced uplink medium access control (MAC-e) protocol data unit (PDU) is generated using a TFC which is selected from the list of available TFCs. The MAC-e PDU is forwarded to a hybrid-automatic repeat request (H-ARQ) process unit for transmission. The list of available TFCs is continuously updated by eliminating and recovering TFCs based on remaining E-DCH power, an E- DCH transport format combination set (TFCS), a power offset of a highest priority MAC-d flow that has E-DCH data to transmit, and a gain factor for each TFC.
Abstract:
A user interface is utilized to establish control communications through a wireless cellular network and a wireless transmit/receive unit (WTRU). The control information is then used to provide user function control and can be used to provide additional data to the user interface, such as location information regarding the WTRU.
Abstract:
A system for supporting communication during discontinuous transmission DXT mode, includes a detector 60 for determining when DXT mode is, a burst generator 60 for generating a special burst SB during DXT mode, including a midamble 14, two transport format combination indicator fields 12a, 12b, two data fields 18a, 18b, and an identification 16 of the SB in at least one of two data fields 18a, 18b, and a transmitter 62 for transmitting the SB during DXT mode.
Abstract:
A receiver or an integrated circuit (IC) incorporated therein includes a fast Fourier transform (FFT)-based (or hybrid FFT-based) sliding window block level equalizer (BLE) for generating equalized samples. The BLE includes a noise power estimator, first and second channel estimators, an FFT-based chip level equalizer (CLEQ) and a channel monitor unit. The noise power estimator generates a noise power estimate based on two diverse sample data streams. The channel estimators generate respective channel estimates based on the sample data streams. The channel monitor unit generates a first channel monitor signal including truncated channel estimate vectors based on the channel estimates, and a second channel monitor signal which indicates an approximate rate of change of the truncated channel estimate vectors. The FFT-based CLEQ generates the equalized samples based on the noise power estimate, one-block samples of the first and second sample data streams, the channel estimates and the monitor signals.
Abstract:
A block linear equalizer (BLE) using an approximate Cholesky decomposition is disclosed. The BLE includes channel estimators, a channel monitor unit, a noise power estimator, a parameter selection unit and an approximate Cholesky processor. The channel estimator generates a channel estimate vector from received samples. The channel monitor unit generates a first channel monitor signal for a truncated channel estimate vector and a second channel monitor signal. The noise power estimator estimates a noise power of the received samples. The parameter selection unit selects parameters for approximate Cholesky decomposition based on the first and second channel monitor signals. The approximate Cholesky processor performs block linear equalization on the received samples based on approximate Cholesky decomposition.