ACK/NACK Signal Concatenation for LTE-A Uplink Transmission
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE-A, lack a detailed method for efficiently transmitting ACK/NACK signals of more than 11 bits on a single PUSCH.
Innovation Solution
The solution involves concatenating coded bit sequences alternately in units of a certain number of bits or concatenating one coded bit sequence with the least significant bit of the other, enabling efficient transmission of ACK/NACK signals on the physical uplink channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If ACK/NACK signals of more than 11 bits are transmitted on a single PUSCH using conventional methods, then the transmission capacity is insufficient, but the device complexity and decoding difficulty increase significantly
Solution Approach 1:
The patent divides the ACK/NACK signal transmission into two separate coded bit sequences (first and second sequences), each corresponding to different downlink component carriers. This segmentation allows each sequence to be independently encoded and transmitted, reducing the complexity of handling large-capacity signals while maintaining overall transmission capacity.
Solution Approach 2:
The patent introduces a new dimension for signal organization by alternating the arrangement of coded bits from two different sequences in the time or frequency domain. This dimensional reorganization enables efficient multiplexing of multiple ACK/NACK sequences on a single PUSCH without significantly increasing decoding complexity at the receiver.
2Productivity
If multiple ACK/NACK sequences are transmitted on a single PUSCH, then the transmission efficiency improves, but the signal characteristics and decoding accuracy may deteriorate
Solution Approach 1:
By segmenting the ACK/NACK information into separate coded sequences for different component carriers, the patent maintains the integrity of each individual signal while enabling efficient combined transmission. This segmentation approach prevents signal interference and maintains decoding accuracy.
Solution Approach 2:
The patent applies different encoding and modulation parameters to different segments of the ACK/NACK signal based on their specific requirements. This local optimization ensures that each segment maintains its signal characteristics and reliability while contributing to the overall transmission efficiency.
Data Source
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AI summary
A mobile station device efficiently transmits an ACK/NACK of more than 11 bits on a physical uplink channel. A mobile station device for communicating with a base station device divides a plurality of ACKs/NACKs indicating success or failure of decoding of a plurality of pieces of uplink data received from the base station device, separately encodes the divided ACKs/NACKs, and changes a method for concatenating the encoded bits of the separately encoded ACKs/NACKs in accordance with whether the ACKs/NACKs are to be transmitted on a physical uplink control channel or a physical uplink shared channel.