NR Single Symbol Design via FDM Reference Signals
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Solution Overview
Problem
Current wireless communication technologies, particularly for 5G NR, lack an efficient and reliable single symbol design for uplink short burst transmissions of small payloads, such as ACKs represented by one or two bits, which are crucial for reliable data transmission in wireless communication systems.
Innovation Solution
A method is introduced that involves assigning different encoding sequences to each possible value of an information element to maximize the minimum distance between encoding sequences, and transmitting a symbol configured with frequency division multiplexed reference signals and data tones, optimizing reliability and performance by selecting sequences based on peak-to-average power ratio (PAPR) and interleaving patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OFDM-based design is used for single symbol transmissions of larger payloads, then reliable transmission can be achieved, but the design remains unclear and inefficient for smaller payloads (one or two bits)
Solution Approach 1:
The patent segments the single symbol transmission into distinct functional components: reference signal tones for channel estimation and data tones for information carrying. This segmentation enables clear design for small payloads by separating the reliable reference signal transmission from the compact data transmission, resolving the design clarity issue while maintaining reliability.
Solution Approach 2:
The patent changes the parameter of payload size consideration by providing separate design approaches for small payloads (1-2 bits) versus larger payloads. For small payloads, it uses a specific configuration with reference signals frequency division multiplexed with data tones, optimizing the design for the actual use case of small payload transmissions while maintaining overall system reliability.
2Reliability
If encoding sequences are assigned to maximize minimum distance, then error rates are reduced, but sequence selection and PAPR optimization increase processing complexity
Solution Approach 1:
The patent applies preliminary action by pre-defining a set of valid encoding sequences and their corresponding PAPR characteristics before transmission. The processor selects from these pre-defined sequences based on the information element value, avoiding complex real-time sequence generation while still achieving maximum minimum distance and optimized PAPR for reduced error rates.
Solution Approach 2:
The patent changes the parameter of sequence selection by establishing a mapping between information element values and specific encoding sequences that maximize minimum distance. This parameter change approach reduces processing complexity by transforming the selection problem into a direct lookup based on the information element value, while maintaining optimal error rate performance.
3Productivity
If reference signals are frequency division multiplexed with data tones, then single symbol transmission efficiency is improved, but PAPR optimization becomes more challenging
Solution Approach 1:
The patent changes the parameter of PAPR optimization by establishing a direct mapping between information element values and encoding sequences with optimized PAPR characteristics. This allows the system to achieve efficient single symbol transmission through frequency division multiplexing while simplifying PAPR optimization to a sequence selection problem rather than a complex optimization problem.
Solution Approach 2:
The patent applies preliminary action by pre-characterizing the PAPR properties of different encoding sequence combinations before transmission. This allows the receiver to efficiently select sequences that balance transmission efficiency with acceptable PAPR levels, avoiding complex real-time PAPR optimization while maintaining high productivity in single symbol transmissions.
Data Source
AI summary
Aspects of the disclosure relate to a new radio (NR) single symbol design in which reference signals and data tones are frequency division multiplexed (FDM). In a particular aspect of the disclosure, a different encoding sequence is assigned to each possible value of an information element (IE) such that a minimum distance between encoding sequences corresponding to any pair of possible values is maximized. A symbol corresponding to a particular value of the IE is then transmitted. Here, the symbol is configured according to a sequence selected from a set of sequences corresponding to the particular value of the IE, such that the symbol comprises a plurality of reference signals FDM with a plurality of FDM resource elements.