Abstract:
A method includes separating resource elements from multiple code blocks into different groups, and decoding the code bits of the resource elements within each group without waiting for a completed reception of a transport block to start decoding.A method includes separating coded bits from multiple code blocks into different groups, and decoding the code blocks containing coded bits within each group. A first CRC is attached to the transport block and a second CRC is attached to at least one code block from the transport block.An improved channel interleaver design method including mapping from coded bits of different code blocks to modulation symbols, and mapping from modulation symbols to time, frequency, and spatial resources, to make sure each code block to get roughly the same level of protection.
Abstract:
A transmission resource in a time domain subframe is divided into a plurality of equal duration resource elements in a time and frequency domain, the plurality of resource elements are segregated into a plurality of resource regions, information to be transmitted is modulated to generate a sequence of modulation symbols at a transmitter, the sequence of modulation symbols is mapped into the plurality of resource elements in the plurality of resource regions, and the modulation symbols are transmitted via a plurality of antennas using the respective corresponding resource elements to a receiver. The mapping of the modulation symbols in at least one resource region is independent of a certain control channel information that is carried in the time domain subframe, and the mapping of the modulation symbols in at least another resource region is dependent upon that certain control channel information.
Abstract:
Asynchronous Hybrid Automatic Repeat reQuest (ARQ) process identities are transmitted in a wireless communication system. A linking scheme is established between at least two sets of process identities of two respective corresponding codewords. When a first process identity is selected from among a first set of process identities of a first codeword, a second process identity may be derived in dependence upon the first process identity and the established linking scheme. Finally, a first packet from the first codeword is transmitted using a first transmission channel indicated by the first process identity, and a second packet is transmitted from the second codeword using a second transmission channel indicated by the second process identity. In addition, a control message including only the first process identity is transmitted.
Abstract:
Resource elements from multiple code blocks are separated into different groups, and the code bits of the resource elements within each group are decoded without waiting for a completed reception of a transport block to start decoding. Coded bits from multiple code blocks are similarly separated into different groups, and code blocks containing coded bits within each group are decoded. A first CRC is attached to the transport block and a second CRC is attached to at least one code block from the transport block. An improved channel interleaver maps coded bits of different code blocks to modulation symbols, and maps modulation symbols to time, frequency, and spatial resources, to make sure each code block receives approximately the same level of protection.
Abstract:
Several open-loop solutions encompass the small delay CDD codeword cycling and codeword cycling between different re-transmissions of both small and large delay CDD, and include an open-loop codeword cycling method for an SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ. In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for every a certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennas.
Abstract:
A method for performing data transmission between a transmitter and a receiver. The method includes the steps of generating a feedback message at the receiver in response to data received from the transmitter, assigning an identifier for the feedback message, storing the feedback message in association with the identifier in the receiver, transmitting the feedback message and the identifier to the transmitter, determining, at the transmitter, transmission format for data to be transmitted to the receiver based on the feedback message received from the receiver; and transmitting data and a control message, by the transmitter, using the determined transmission format, with the control message comprising the identifier of the feedback message based on which the transmission format is determined.
Abstract:
A wireless communication network includes a base station and a relay station. The relay station is configured to relay communications between the base station and at least one subscriber station. The base station is configured to communicate with the subscriber station via the relay station. The base station further is configured to transmit, in a subframe, a plurality of transport blocks for a plurality of Hybrid Automatic Repeat Request (HARQ) processes to the relay station. Each transport block corresponds to a different HARQ process.
Abstract:
Methods and apparatus for transmitting power setting information in a downlink Physical Downlink Shared Channel (PDSCH) in a communication system. In this communication system, a plurality of methods for calculating traffic-to-pilot ratios (T2P) are established. In addition, a mapping scheme between a plurality of overhead signals and a plurality of reference signal (RS) overhead ratios, ηRS, and the plurality of T2P calculation methods is established. A user-specific T2P ratio PB, k/PRS for certain OFDM symbols, a RS overhead ratio ηRS and a calculation method selected from the plurality of T2P calculation methods are assigned to a wireless terminal. Then, an overhead signal corresponding to both of the assigned RS overhead ratio ηRS and the assigned T2P calculation method is selected in accordance with the mapping scheme and is transmitted to the wireless terminal. In addition, the user-specific traffic-to-pilot ratio PB, k/PRS is transmitted to the wireless terminal. The wireless terminal may calculate the traffic-to-pilot ratios across different transmission antennas and different OFDM symbols in dependence upon the received traffic-to-pilot ratio PB, k/PRS, and the RS overhead ratio and the T2P calculation method indicated by the RS overhead signal.
Abstract:
An apparatus includes a baseband signal processing block, processing circuitry, and at least one radio frequency (RF) communication module communicably coupled to the baseband signal processing block and configured to communicate using a selected mode of communication in a channel. The processing circuitry is configured to detect a sub-channel band of unavailable spectrum within the channel, the band of unavailable spectrum being less than a whole of the channel. The channel includes one contiguous band of frequencies divisible into at least two non-overlapping non-adjacent sub-channels. The processing circuitry is configured to select one mode of communication selected from a plurality of modes including: a carrier aggregation (CA) only mode, a multiple input multiple output (MIMO) only mode, and a carrier aggregation multiple input multiple output (CA-MIMO) hybrid mode.
Abstract:
A method for performing data transmission between a transmitter and a receiver. The method includes the steps of generating a feedback message at the receiver in response to data received from the transmitter, assigning an identifier for the feedback message, storing the feedback message in association with the identifier in the receiver, transmitting the feedback message and the identifier to the transmitter, determining, at the transmitter, transmission format for data to be transmitted to the receiver based on the feedback message received from the receiver; and transmitting data and a control message, by the transmitter, using the determined transmission format, with the control message comprising the identifier of the feedback message based on which the transmission format is determined.