Combined Cyclic Prefix and Guard Interval Waveform for Wireless Communication
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Solution Overview
Problem
Current wireless communication systems face inefficiencies and increased latency due to the limitations of cyclic prefix-based and guard interval-based waveforms, particularly in managing beam switch operations and resource allocation, which can lead to overhead and reduced reliability.
Innovation Solution
Implementing a combined cyclic prefix and guard interval-based waveform format that includes a cyclic prefix symbol concatenated with multiple guard interval symbols, allowing for an extended cyclic prefix length within slot boundaries, enabling self-contained communication and efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cyclic prefix-based format is used, then inter-symbol interference is reduced, but the number of symbols per slot is limited and beam switch operations may require additional symbol duration
Solution Approach 1:
The patent combines cyclic prefix and guard interval functionalities into a unified waveform structure. The first symbol contains multiple cyclic prefixes followed by a guard interval, merging the interference protection function with the beam switching function, allowing more symbols to fit within slot boundaries while maintaining reliability.
Solution Approach 2:
The extended cyclic prefix structure serves multiple functions simultaneously: it provides inter-symbol interference protection through the cyclic prefix portion and enables beam switch operations during the guard interval portion within the same symbol duration, making the structure multi-functional.
2Productivity
If a guard interval-based format is used, then more symbols can be included in a slot, but the guard interval for the first symbol may be located outside slot boundaries
Solution Approach 1:
The patent reorganizes the waveform structure by placing the guard interval within the first symbol's time domain allocation rather than outside slot boundaries. This dimensional reorganization ensures the slot structure remains self-contained while still providing the necessary guard interval functionality.
3Reliability
If beam switch operation duration exceeds cyclic prefix or guard interval duration, then additional symbol duration must be allocated, reducing communication efficiency
Solution Approach 1:
The patent merges beam switch operations with the guard interval portion of the first symbol, allowing both functions to occur within the same time allocation. This eliminates the need for additional symbol duration while ensuring reliable beam switching completion.
Solution Approach 2:
The beam switch operation is performed during the guard interval portion of the first symbol before subsequent data transmission begins, preparing the system in advance for the next communication phase without adding latency.
4Reliability
If extended cyclic prefix length is implemented within slot boundaries, then self-contained communication is achieved, but the waveform format complexity increases
Solution Approach 1:
The first symbol is segmented into distinct portions: multiple cyclic prefixes followed by a guard interval. This segmentation allows the extended cyclic prefix functionality to be achieved while maintaining clear structural boundaries that simplify implementation and reduce overall complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station may communicate according to a combined cyclic prefix and guard interval-based waveform format. The base station may transmit control signaling to the UE. The control signaling may indicate a slot configuration. The UE may identify a format of a slot including a set of symbols based on the slot configuration. The format may indicate that a first portion of a first symbol of the set of symbols includes at least two cyclic prefixes and a second portion of the first symbol includes a guard interval. The UE and the base station may perform wireless communications during the first symbol in accordance with the format.