# US 2008/0186934 A1 · MIMO control signaling in a wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0186934 A1 - Document ID: US20080186934A1 - Status: Published application - Kind: A1 - Application number: 11/882,313 - Filed: 2007-07-31 - Published: 2008-08-07 - Earliest claimed: 2007-02-05 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Farooq Khan; Zhouyue Pi - Web page: https://patentgrep.com/patent/US20080186934A1 ## CPC - H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)} - H04L 1/0046: {Code rate detection or code type detection (H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091)} - H04L 1/0072: {Error control for data other than payload data, e.g. control data} - H04L 1/0079: {Formats for control data (H04L1/16 takes precedence; training sequences H04L25/00 and H04L27/00)} - H04L 1/06: using space diversity - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention relates to a method for data transmission in a communication system. The method including, determining, at the transmitter, whether to transmit data signal using a single codeword or two codewords, when it is determined that the single codeword transmission is used, coding, by the transmitter, a control signal by using a first signal format, with the control signal coded by the first signal format carrying information regarding the single codeword, when it is determined that the two codewords transmission is used, coding, by the transmitter, the control signal by using a second signal format, with the control signal coded by the second signal format carrying information regarding both of the two codewords, transmitting the data signal and the control signal according to the determined transmission format from the transmitter to the receiver. ## Claims ### Claim 1 A method for performing data transmission, the method comprising the steps of: modulating a data signal at a transmitter, using at least one codeword; formatting a control signal using a signal format in dependence upon the quantity of the codewords used, with the formatted control signal carrying information of all the codewords used; and transmitting the data signal accompanied by the control signal to a receiver. ### Claim 2 (depends on 18) The method of claim 18, further comprising the step of: decoding the control signal at a receiver, by recursively applying a plurality of signal formats including said signal format used for formatting the control signal until the control signal is decoded. ### Claim 3 A method for performing data transmission, the method comprising the steps of: modulating a data signal at a transmitter with either a single codeword or two codewords; transmitting the modulated data signal accompanied by a control signal via the transmitter, with: when the data signal is modulated with the single codeword, the control signal is coded with a first signal format for carrying information regarding the single codeword; when the data signal is modulated with the two codewords transmission is used, the control signal is coded with a second signal format for carrying information regarding both of the two codewords. ### Claim 4 (depends on 3) The method of claim 3, with the control signal coded using the first signal format comprised of: an identifier of a receiver; information about resource elements allocated to the data signal; information about the single codeword; and transmission information, comprised of at least one of transmission rank, selected layers, ordering of layers, and precoding information. ### Claim 5 (depends on 3) The method of claim 3, with the control signal coded using the second signal format comprised: an identifier of a receiver; information about resource elements allocated to the data signal; information about one of the two codewords; information about a remaining one of the two codewords; and transmission information, comprised of at least one of transmission rank, selected layers, ordering of layers, and preceding information. ### Claim 6 (depends on 3) The method of claim 3, with the information comprising: a size of a data block occupied by the data signal; a scheme used to modulate the data signal; and hybrid automatic repeat request information. ### Claim 7 (depends on 3) The method of claim 3, further comprising the steps of: decoding at a the receiver, the control signal by recursively applying the first signal format and the second signal format, until the control signal is decoded. ### Claim 8 (depends on 3) The method of claim 3, further comprising the steps of: determining at the receiver, whether the transmitter transmits the data signal using a rank value of 1 or higher; and when the transmitter transmits the signal using a rank value of 1, disposing the receiver to decode the control signal by applying the first signal format, determining whether the decoding of the control signal using the first signal format is performed successfully, when the control signal is decoded successfully, processing the data signal by assuming that the data is modulated with the single codeword, and when the decoding is unsuccessfully, terminating the processing of the data signal. ### Claim 9 (depends on 3) The method of claim 3, comprising: when the control signal uses the first signal format, disposing the the control signal to carry a first number of bits, coding the control signal by using a first code rate, modulating the control signal by using a first modulation scheme, and transmitting the control signal by using a first amount of physical resources; and when the control signal uses the second signal format, disposing the control signal to carry a second number of bits, coding the control signal by using a second code rate, modulating the control signal by using a second modulation scheme, and transmitting the control signal by using a second amount of physical resources, with the first number of bits being less than the second number of bits, the first code rate being less than the second code rate, the first modulation scheme being the same as the second modulation scheme, and the first amount of physical resources being the same as the second amount of physical resources. ### Claim 10 (depends on 3) The method of claim 3, comprising: when the control signal uses the first signal format, disposing the the control signal to carry a first number of bits, coding the control signal by using a first code rate, modulating the control signal by using a first modulation scheme, and transmitting the control signal by using a first amount of physical resources; and when the control signal uses the second signal format, disposing the control signal to carry a second number of bits, coding the control signal by using a second code rate, modulating the control signal by using a second modulation scheme, and transmitting the control signal by using a second amount of physical resources, with the first number of bits being less than the second number of bits, the first code rate being higher than the second code rate, the first modulation scheme being in a higher order than the second modulation scheme, and the first amount of physical resources being less than the second amount of physical resources. ### Claim 11 (depends on 3) The method of claim 3, comprising: when the control signal uses the first signal format, transmitting the control signal using one transmission layer; and when the control signal uses the second signal format, transmitting the control signal using either one transmission layer or two transmission layers. ### Claim 12 (depends on 3) The method of claim 3, comprising: allocating a first set of time-frequency resource elements to the control signal coded using the first signal format; and allocating a second set of time-frequency recourse elements to the control signal coded using the second signal format. ### Claim 13 (depends on 3) The method of claim 3, comprising: allocating a first set of time slots and the frequencies associated with the first set of time slots, to the control signals coded with the first signal format; and allocating a second set of time slots and the frequencies associated with the second set of time slots, to the control signals coded with the second signal format. ### Claim 14 A transmitter for transmitting data to a receiver, the transmitter modulating a data signal with either a single codeword or two codewords, with: when the transmitter modulates the data signal with the single codeword, the transmitter coding a control signal using a first signal format for carrying information regarding the single codeword, and when the transmitter modulates the data signal with the two codewords, the transmitter coding the control signal using a second signal format for carrying information regarding both of the two codewords, and the transmitter transmitting the control signal accompanied by the control signal. ### Claim 15 (depends on 14) The transmitter of claim 14, with: when the control signal uses the first signal format, the transmitter disposing the the control signal to carry a first number of bits, coding the control signal by using a first code rate, modulating the control signal by using a first modulation scheme, and transmitting the control signal by using a first amount of physical resources; and when the control signal uses the second signal format, the transmitter disposing the control signal to carry a second number of bits, coding the control signal by using a second code rate, modulating the control signal by using a second modulation scheme, and transmitting the control signal by using a second amount of physical resources, with the first number of bits being less than the second number of bits, the first code rate being less than the second code rate, the first modulation scheme being the same as the second. modulation scheme, and the first amount of physical resources being the same as the second amount of physical resources. ### Claim 16 (depends on 3) The transmitter of claim 3, with: when the control signal uses the first signal format, the transmitter disposing the the control signal to carry a first number of bits, coding the control signal by using a first code rate, modulating the control signal by using a first modulation scheme, and transmitting the control signal by using a first amount of physical resources; and when the control signal uses the second signal format, the transmitter disposing the control signal to carry a second number of bits, coding the control signal by using a second code rate, modulating the control signal by using a second modulation scheme, and transmitting the control signal by using a second amount of physical resources, with the first number of bits being less than the second number of bits, the first code rate being higher than the second code rate, the first modulation scheme being in a higher order than the second modulation scheme, and the first amount of physical resources being less than the second amount of physical resources. ### Claim 17 (depends on 3) The transmitter of claim 3, with: when the control signal uses the first signal format, the transmitter transmitting the control signal using one transmission layer; and when the control signal uses the second signal format, the transmitter transmitting the control signal using either one transmission layer or two transmission layers. ### Claim 18 A receiver for receiving data signal accompanied by a control signal from a transmitter, comprising: a decoder decoding the control signal using either a first signal format or a second signal format, the first signal format being used when the data signal has been transmitted using a single codeword, and the second signal format being used when the data signal has been transmitted using a second codeword; a first determination unit determining whether the control signal has been decoded by the decoder; a processor processing the data signal; and a control unit sending instructions to: instruct the decoder to decode the control signal using the first signal format; instruct the first determination unit to determine whether the control signal has been decoded by using the first signal format; when the control signal is decoded using the first signal, instruct the processor to process the data signal by assuming that the data is transmitted using the single codeword transmission; when the the control signal is not decoded, instruct the decoder to decode the control signal using the second signal format; instruct the first determination unit to determine whether the decoding using the second signal format is successfully performed; when the control signal is decoded using the second signal format, instruct the processor to process the data signal by assuming that the data is transmitted using the two codewords transmission; and when the control signal is not decoded using the second signal format, terminating the processing of the data signal. ### Claim 19 (depends on 18) The receiver of claim 18, further comprising a second determination unit determining whether the transmitter transmits the data signal using a rank value of 1 or higher, and when it is determined that the transmitter transmits the signal using a rank value of 1, the control unit instructing the decoder to decode the control signal using the first signal format, instructing the first determination unit to determine whether the control signal is decoded using the first signal format, when the control signal is decoded, instructing the processor to process the data signal by assuming that the data is transmitted using the single codeword transmission, and when the control signal is not decoded, terminating the processing of the data signal.