Wireless Signaling Bit Allocation for Multiplexing Overlap
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Solution Overview
Problem
Existing wireless communication systems face challenges in designing fields for indicating Transmitted Precoding Matrix Indicator (TPMI) and Sounding Reference Signal Resource Indicator (SRI) to meet different requirements across various multiplexing methods, particularly in space division and frequency division multiplexing, which affects transmission efficiency and flexibility.
Innovation Solution
A method where the number of bits in the fields used to indicate TPMI and SRI is correlated with the relationship between time-domain resources occupied by sub-signals, ensuring that when resources overlap, the number of bits is at least the logarithm of the sum of candidate integers with base 2, and when resources are orthogonal, it is at least the logarithm of the greatest value of candidate integers with base 2, allowing for flexible indication of antenna ports and precoders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If space division or frequency division multiplexing is used to improve throughput, then transmission efficiency is improved, but the number of bits required to indicate TPMI and SRI increases
Solution Approach 1:
The patent divides the indication of TPMI and SRI into separate fields within the DCI structure. The first field indicates TPMI while the second field indicates SRI, allowing independent optimization of each field's bit width based on the specific multiplexing scenario requirements.
Solution Approach 2:
The patent introduces dynamic determination of field bit widths based on the multiplexing method and channel quality conditions. The number of bits in the second field is dynamically adjusted according to whether time-domain resources overlap and the K1 candidate integers, enabling adaptive information encoding.
2Device complexity
If time division multiplexing is used, then implementation complexity is reduced, but throughput is limited compared to space or frequency division multiplexing
Solution Approach 1:
The patent designs a unified DCI structure that can accommodate multiple multiplexing methods (time division, space division, frequency division) through a single field configuration mechanism. The same first and second fields can be interpreted differently based on the multiplexing method, eliminating the need for separate indication mechanisms for each method.
3Adaptability or versatility
If the number of bits for indicating TPMI and SRI is increased to support space division or frequency division multiplexing, then transmission flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent applies different bit width requirements to different fields based on local needs. The first field (TPMI indication) uses a fixed or small variable number of bits, while the second field (SRI indication) uses a variable number of bits determined by K1 candidate integers and multiplexing method, optimizing each field's size according to its specific requirements.
Data Source
AI summary
A first node receives a first signaling and transmits a first signal. The first signaling indicates scheduling information of the first signal; the first signal comprises a first sub-signal and a second sub-signal; a first field and a second field of the first signaling are respectively used to determine antenna ports for transmitting the first sub-signal and the second sub-signal; a payload of bit(s) in the second field of the first signaling is related to K1 candidate integers; the relationship between the payload of the bit(s) in the second field of the first signaling and the K1 candidate integers is related to whether a time-domain resource occupied by the first sub-signal overlaps with a time-domain resource occupied by the second sub-signal. The above method meets different requirements for the number of bits in the first field and the second field for different multiplexing methods.