Abstract:
A signal encoding method and device and a method for encoding a joint feedback signal are provided. When two carriers are configured with multiple-input and multiple-output (MIMO), Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) signals of the two carriers are combined into a joint feedback signal. The joint feedback signal is mapped into a codeword according to predetermined mapping relationship between signals and codewords. Therefore, through the method for combining and encoding feedback signals of two carriers for transmission on a code channel in a dual cell (DC)-MIMO mode, bit error ratio (BER) and detection error cost are decreased, power overhead is saved, and a cubic metric (CM) value of the system is not affected, thereby enhancing the performance of the system.
Abstract:
A method and apparatus for encoding feedback signal is provided. The method includes: encoding feedback signals of three carriers to output a bit sequence; and transmitting the bit sequence on a High Speed-Dedicated Physical Control Channel (HS-DPCCH). The encoding the feedback signals of the three carriers may specifically include: mapping the feedback signals of the three carriers into a codeword, in which the codeword can be selected from a codebook, and codewords in the codebook satisfy a particular code distance relationship. The method for jointly encoding feedback signals of three carriers in a Ternary Cell (TC) mode is provided. Feedback signals are transmitted over a single code channel. Therefore, power overhead is reduced, and system performance is improved.
Abstract:
A method, a user equipment, and a base station device for transmitting indication information. A method comprises: initially setting an indication information feedback mode of a user equipment to a deactivation state, where the user equipment in the deactivation state does not transmit indication information to a base station; after receiving an indication information feedback request transmitted by a network side, setting the indication information feedback mode of the user equipment to an activation state, where the user equipment in the activation state uses an indication information feedback cycle to transmit the indication information to the base station. Embodiments of the present disclosure initially set a user equipment to a deactivation state of not transmitting indication information to the base station, set a user equipment to an activation state of transmitting indication information when a network side has transmitted an indication information feedback request, reducing unnecessary uplink indication information feedback.
Abstract:
A method, a user equipment and a base station are provided. The method is for transmitting Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information in a communication system in which two carriers are configured, which includes: a user equipment encodes a codeword of the two carriers. The codeword represents encoded HARQ-ACK information of a first carrier and a second carrier according to a specific encoding scheme of dual-carrier configured with Multiple-Input Multiple-Output (DC-MIMO). The user equipment then transmits the encoded codeword of the two carriers to a base station. Therefore, bit error ratio (BER) and detection error cost are decreased, power overhead is saved, and a cubic metric (CM) value of the system is not affected, thereby enhancing the performance of the system.
Abstract:
A signal encoding method and device and a method for encoding a joint feedback signal are provided. When two carriers are configured with multiple-input and multiple-output (MIMO), Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) signals of the two carriers are combined into a joint feedback signal. The joint feedback signal is mapped into a codeword according to predetermined mapping relationship between signals and codewords. Therefore, through the method for combining and encoding feedback signals of two carriers for transmission on a code channel in a dual cell (DC)-MIMO mode, bit error ratio (BER) and detection error cost are decreased, power overhead is saved, and a cubic metric (CM) value of the system is not affected, thereby enhancing the performance of the system.
Abstract:
A method and apparatus for encoding feedback signal is provided. The method includes: encoding feedback signals of three carriers to output a bit sequence; and transmitting the bit sequence on a High Speed-Dedicated Physical Control Channel (HS-DPCCH). The encoding the feedback signals of the three carriers may specifically include: mapping the feedback signals of the three carriers into a codeword, in which the codeword can be selected from a codebook, and codewords in the codebook satisfy a particular code distance relationship. The method for jointly encoding feedback signals of three carriers in a Ternary Cell (TC) mode is provided. Feedback signals are transmitted over a single code channel. Therefore, power overhead is reduced, and system performance is improved.
Abstract:
Embodiments of the present invention disclose a pilot signal transmitting method, and a channel estimation method, an apparatus, and a system. The method includes: within a transmission time interval (TTI), transmitting a first pilot signal (CPICH1) on a first antenna, and transmitting a second pilot signal (CPICH2) on a second antenna; when no first-type terminal is scheduled within coverage of a MIMO system within the TTI, transmitting a third pilot signal (CPICH3) on a third antenna, and transmitting a fourth pilot signal (CPICH4) on a fourth antenna; and when a first-type terminal is scheduled within the coverage of the MIMO system within the TTI, transmitting the CPICH3 and a fifth pilot signal (CPICH5) on the third antenna, and transmitting the CPICH4 and a sixth pilot signal (CPICH6) on the fourth antenna. By using the method, interference of a pilot signal to a legacy terminal can be greatly reduced.
Abstract:
A method, a user equipment and a base station are provided. The method is for transmitting Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information in a communication system in which two carriers are configured, which includes: a user equipment encodes a codeword of the two carriers. The codeword represents encoded HARQ-ACK information of a first carrier and a second carrier according to a specific encoding scheme of dual-carrier configured with Multiple-Input Multiple-Output (DC-MIMO). The user equipment then transmits the encoded codeword of the two carriers to a base station. Therefore, bit error ratio (BER) and detection error cost are decreased, power overhead is saved, and a cubic metric (CM) value of the system is not affected, thereby enhancing the performance of the system.
Abstract:
The present invention discloses a data retransmission method, apparatus, and system, and relates to the field of communications. In a data retransmission method, a special codeword is determined according to a difference between a number of layers selected by a transmitter and the number of layers that need to be occupied for retransmitting a codeword. The number of layers that need to be occupied by the codeword to be retransmitted is smaller than the number of layers selected by the transmitter and no new data needs to be transmitted and wherein the number of transport blocks comprised in the special codeword is equal to the difference. The codeword that needs to be retransmitted and the special codeword are allocated to each transport layer through a layer mapping.
Abstract:
A method for transmitting data streams in a multiple input multiple output (MIMO) system is provided, where each data stream is mapped to multiple layers in an MIMO channel space for transmission, and the method includes: performing inter-layer interleaving for N data streams to obtain N interleaved data streams; mapping the N interleaved data streams respectively to N layers in the MIMO channel space, and transmitting the N interleaved data streams that are mapped to the N layers. By using the method of the present invention, a combined CQI can be used in a better way to improve MIMO transmission performance. Further, an impact of inter-layer interference is canceled by using an interference cancellation technology (for example, an SIC technology) based on the inter-layer interleaving.