Abstract:
Methods, systems, and devices are described for fountain hybrid automatic repeat request (HARM) for reliable low latency communication. A wireless device may transmit a data block based on a low latency operational mode. The device may then transmit a number of redundancy versions of the data block prior to determining whether an acknowledgement (ACK) has been received. In some examples the ACK may be an augmented ACK, which may be based on the number of redundancy versions received prior to successfully decoding the data block, and which may include an additional resource request. In some examples, the device may select an updated modulation and coding scheme (MCS) based on the augmented ACK. In some examples, the device may increase a number of frequency resources (e.g., component carriers) used for transmission based on the augmented ACK.
Abstract:
A mobile station device includes: a management unit managing generation of uplink control information; a transmission power parameter setting unit setting a value of a parameter relevant to transmission power in accordance with the number of information bits of receipt acknowledgement and scheduling request, when the management unit generates the receipt acknowledgement which is uplink control information indicating positive or negative acknowledgement for downlink data and the scheduling request which is uplink control information indicating whether to request resource allocation; and a transmission processing unit controlling, by means of the parameter value set by the transmission power parameter setting unit, the transmission power for a physical uplink control channel used for transmitting a signal generated from the information bits of the receipt acknowledgement and the scheduling request, and transmitting the signal to a base station device using the physical uplink control channel with the controlled transmission power.
Abstract:
Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.
Abstract:
A system receive, from an optical receiver, a signal derived from a first optical signal and a second optical signal generated by a local oscillator, that includes a first component that is an in-phase component and a second component that is a quadrature phase component; filter the signal, using a filter, set to one or more configurations, to obtain one or more recovered signals, where each of the recovered signals includes a respective quantity of noise; perform forward error correction, on the recovered signals, to obtain one or more quantities of bit errors that correspond to the recovered signals; and process the signal using the filter set to a particular configuration, of the one or more configurations, that corresponds to a lowest quantity of bit errors of the one or more quantities of bit error.
Abstract:
A transmission device includes: a transmitter configured to transmit frames including a bit string having a predetermined pattern to an opposite device to the transmission device; a measurement unit configured to measure an elapsed time from a first time at the transmission of the frames including the bit string having the predetermined pattern to the opposite device to a second time at a reception of the frames including the bit string having the predetermined pattern from the opposite device; and a determination unit configured to determine a transmission delay time between the transmission device and the opposite device, based on the measurement result of the measurement unit.
Abstract:
A method and system for transmitting data are described including packetizing the data, performing forward error correction (FEC) encoding on the packetized data in order to generate at least one parity packet, appending FEC information as padding to the end of payload data of the packetized data and transmitting the packetized data and the at least one parity packet. Also described are a method and system for recovering from loss of a packet including receiving a data packet, receiving at least one parity packet, buffering the received data packet, detecting packet loss, forward error correction decoding the at least one parity packet to recover from packet loss using forward error correction information extracted from the data packet and from the at least one parity packet and forwarding the recovered packet via an internal socket. Also described is a method for staggercasting.
Abstract:
Transmission of uplink control message for a wireless system. The uplink control message may be encoded according to one of multiple possible schemes. The choice of encoding scheme may be made based on the control message size and/or based on the available transmission resources and/or based on the detection scheme used on the receiving end. A modulation scheme may also be selected based on such factors. CDM may be used for certain control messages. Block code encoding, such as Reed-Muller encoding may be used for certain control messages. Different transmission resources may be allocated for different control message uses. The encoding specifics may be selected to obtain a certain hamming distance and/or size of the encoded message or based on other factors.
Abstract:
Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.
Abstract:
Systems and methods are presented for controlling the peak-to-average-power of a baseband orthogonal-frequency-domain multiplexing (OFDM) signal by designating a subset of the available subcarriers as information-bearing data-subcarriers, and loading remaining subcarriers by symbols that are a function of the symbols loading the data-subcarriers. At the receiver, the data-dependent subcarriers are optionally combined with data-subcarriers to increase error protection.
Abstract:
A digital broadcast receiver and a control method thereof are provided. The digital broadcast receiver includes a reception unit for receiving a broadcast signal in which mobile service data and main service data are multiplexed, an extractor for extracting transmission parameter channel signaling information and fast information channel signaling information from a data group in the received mobile service data, an acquirer for acquiring a program table describing virtual channel information and a service of an ensemble by using the extracted fast information channel signaling information, the ensemble being a virtual channel group of the received mobile service data, a detector for detecting a descriptor defining Internet access information corresponding to the mobile service data by using the acquired program table, and a controller for controlling the Internet access information of the detected descriptor and the mobile service data to be displayed.