Mixed Waveform Resource Scheduling for Flexible Wireless Links
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Solution Overview
Problem
Existing wireless communications systems lack the ability to efficiently mix multiple waveforms within a bandwidth, limiting flexibility and the ability to leverage the unique characteristics of different waveforms for optimal performance.
Innovation Solution
Implementing a mixed waveform approach where multiple waveforms are combined within the same total bandwidth, utilizing frequency and time domain processing-based waveforms, such as direct sequence, RSMA, and constant envelope waveforms, and using control signaling to schedule resources for different waveforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single waveform is used for communications, then the system is simple to implement, but the flexibility and ability to leverage unique waveform characteristics are limited
Solution Approach 1:
The patent divides the system into multiple waveform types (e.g., OFDM, DFT-S-OFDM, direct sequence waveforms) that can be independently selected and applied to different frequency resources. Each waveform type maintains its own characteristics and processing chain, allowing the system to segment the communication resource into waveform-specific segments that can be optimized independently.
Solution Approach 2:
The patent creates a universal waveform selection mechanism where a single communication resource can support multiple waveform types through control signaling. The system becomes multi-functional by allowing dynamic selection of waveform types based on data characteristics, channel conditions, and service requirements, enabling one system to perform multiple waveform-based functions.
2Productivity
If multiple waveforms are multiplexed over different frequency domain resources, then spectral efficiency and power consumption are improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic waveform selection where the waveform type applied to a given frequency resource can change over time based on control signaling. The system dynamically adapts the waveform type to match current communication requirements, channel conditions, and data characteristics, allowing optimal spectral efficiency while managing complexity through controlled adaptability.
Solution Approach 2:
The patent changes the waveform type parameter based on data type and channel conditions. Different data types (e.g., enhanced mobile broadband, machine type communications, Internet of Things) trigger different waveform selections, allowing the system to optimize spectral efficiency and power consumption by matching waveform parameters to the specific communication task at hand.
3Reliability
If waveform type is selected based on data type, then communication performance is optimized, but the scheduling complexity increases
Solution Approach 1:
The patent performs preliminary waveform type indication through control signaling before the actual data transmission. The system pre-determines the appropriate waveform type based on the data type and channel conditions, then communicates this selection to the receiving device in advance, allowing both devices to prepare their processing chains and avoid complex real-time decisions during transmission.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication of a set of frequency domain resources allocated to the UE for communicating data over a wireless channel. The UE may receive an indication of a waveform type associated with the set of frequency domain resources. The waveform type may be based at least in part on a data type of the data, may be used for a defined amount of time, and may be one of a plurality of waveform types that are multiplexed together over different frequency domain resources within a total system bandwidth. The UE may communicate within the set of frequency domain resources according to the indicated waveform type and the data type.