Transmission of data by multiple users over shared resources

A method for transmitting data to a receiver of a wireless communication network, the method comprising:

• receiving an information message to be transmitted to the receiver of the wireless communication network,
• selecting, from a codebook, a codeword associated with the received information, the codebook comprising a plurality of codewords, and each codeword being a vector comprising a plurality of symbols, each symbol to be transmitted over resources of the wireless communication network,
• dividing the selected codeword into a plurality of sub-codewords,
• transmitting a first sub-codeword, and
• transmitting a second sub-codeword responsive to an indication that the encoded information message was not successfully decoded at the receiver using the received first sub-codeword,
• wherein the resources of the wireless communication network comprise a plurality of resource elements, wherein at least a subset of the plurality of resource elements is shared by a plurality of transmitters for transmitting data from the plurality of transmitters to the receiver, and wherein the symbols of the vector representing a codebook are transmitted over the shared resource elements of the wireless communication network, and
• wherein the transmitter
• registers with the wireless communication network when establishing or re-establishing a connection to the wireless communication network, the transmitter, responsive to the registration, receiving information indicating the shared resources, or
• comprises information indicating the shared resources, and the transmitter accesses the wireless communication network using the known shared resources when establishing or re-establishing a connection to the wireless communication network without performing a registration procedure.

A non-transitory digital storage medium having stored thereon a computer program for performing, when said computer program is run by a computer, a method for transmitting data to a receiver of a wireless communication network, the method comprising:

• receiving an information message to be transmitted to a receiver of the wireless communication network,
• selecting, from a codebook, a codeword associated with the received information, the codebook comprising a plurality of codewords, and each codeword being a vector comprising a plurality of symbols, each symbol to be transmitted over resources of the wireless communication network,
• dividing the selected codeword into a plurality of sub-codewords,
• transmitting a first sub-codeword, and
• transmitting a second sub-codeword responsive to an indication that the encoded information message was not successfully decoded at the receiver using the received first sub-codeword,
• wherein the resources of the wireless communication network comprise a plurality of resource elements, wherein at least a subset of the plurality of resource elements is shared by a plurality of transmitters for transmitting data from the plurality of transmitters to the receiver, and wherein the symbols of the vector representing a codebook are transmitted over the shared resource elements of the wireless communication network, and
• wherein the transmitter
• registers with the wireless communication network when establishing or re-establishing a connection to the wireless communication network, the transmitter, responsive to the registration, receiving information indicating the shared resources, or
• comprises information indicating the shared resources, and the transmitter accesses the wireless communication network using the known shared resources when establishing or re-establishing a connection to the wireless communication network without performing a registration procedure.

A receiver for a wireless communication network, the wireless communication network comprising a plurality of resource elements, at least a subset of the plurality of resource elements shared by a plurality of transmitters for transmitting data from the plurality of transmitters to the receiver, the receiver comprising:

• at least one antenna,
• a transceiver coupled to the at least one antenna, the transceiver configured to receive via the at least one antenna a receive signal on the subset of resource elements, wherein the receive signal comprises sub-codewords associated with information messages to be transmitted by the respective transmitters, each sub-codeword acquired by dividing, at the transmitter, a codeword into a plurality of sub-codewords, and
• a decoder coupled to the transceiver, the decoder configured to acquire from the receive signal the plurality of sub-codewords, to determine, for each transmitter, whether the information message transmitted by the transmitter can be decoded successfully using the received sub-codeword associated with the transmitter, and to decode an encoded information message from a transmitter, in case decoding using the sub-codeword is possible,
• wherein the decoder is configured to determine the decodability of an encoded information message and/or an inactive transmitter using log-likelihood ratios associated with the codewords constructed from the received sub-codeword.

A method for receiving data at a receiver of a wireless communication network, the wireless communication network comprising a plurality of resource elements, at least a subset of the plurality of resource elements shared by a plurality of transmitters for transmitting data from the plurality of transmitters to the receiver, the method comprising:

• receiving a receive signal on the subset of resource elements, wherein the receive signal comprises sub-codewords associated with information messages to be transmitted by the respective transmitters, each sub-codeword acquired by dividing, at the transmitter, a codeword into a plurality of sub-codewords,
• acquiring from the receive signal the plurality of sub-codewords,
• determining, for each transmitter, whether the information message transmitted by the transmitter can be decoded successfully using the received sub-codeword associated with the transmitter, and
• decoding an encoded information message from a transmitter, in case decoding using the sub-codeword is possible,
• wherein decoding comprises determining the decodability of an encoded information message and/or an inactive transmitter using log-likelihood ratios associated with the codewords constructed from the received sub-codeword.

A non-transitory digital storage medium having stored thereon a computer program for performing, when said computer program is run by a computer, a method for receiving data at a receiver of a wireless communication network, the wireless communication network comprising a plurality of resource elements, at least a subset of the plurality of resource elements shared by a plurality of transmitters for transmitting data from the plurality of transmitters to the receiver, the method comprising:

• receiving a receive signal on the subset of resource elements, wherein the receive signal comprises sub-codewords associated with information messages to be transmitted by the respective transmitters, each sub-codeword acquired by dividing, at the transmitter, a codeword into a plurality of sub-codewords,
• acquiring from the receive signal the plurality of sub-codewords,
• determining, for each transmitter, whether the information message transmitted by the transmitter can be decoded successfully using the received sub-codeword associated with the transmitter, and
• decoding an encoded information message from a transmitter, in case decoding using the sub-codeword is possible,
• wherein decoding comprises determining the decodability of an encoded information message and/or an inactive transmitter using log-likelihood ratios associated with the codewords constructed from the received sub-codeword.