OTFS Delay-Doppler Scheduling Units for Flexible Resource Allocation
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Solution Overview
Problem
There is no design for a scheduling unit in the delay-Doppler (DD) domain for orthogonal time frequency space (OTFS) modulation systems, which hinders effective communication resource allocation.
Innovation Solution
A method and apparatus for determining a scheduling unit in the DD domain, with parameters such as M, N, t, and f, to adapt OTFS systems, and incorporating cyclic prefixes (CP) to manage symbol interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If no scheduling unit design is implemented in the DD domain for OTFS systems, then the system lacks adaptability to OTFS modulation, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent segments the delay-Doppler domain resources into discrete scheduling units defined by parameters M (number of symbols in delay domain) and N (number of subcarriers in Doppler domain). This segmentation enables structured resource allocation while maintaining adaptability to OTFS modulation characteristics.
Solution Approach 2:
The patent introduces a two-dimensional scheduling unit structure in the delay-Doppler domain, transitioning from traditional one-dimensional time-frequency scheduling. The scheduling unit spans M symbols in the delay domain and N subcarriers in the Doppler domain, creating a novel resource allocation paradigm adapted to OTFS.
2Adaptability or versatility
If scheduling units with large M and N values are used, then resource allocation flexibility improves, but communication stability in high mobility scenarios deteriorates
Solution Approach 1:
The patent enables dynamic adjustment of scheduling unit parameters M and N based on channel conditions and mobility scenarios. The scheduling unit configuration can be adapted to balance between resource allocation flexibility and communication stability, allowing the system to optimize performance under varying mobility conditions.
3Reliability
If cyclic prefix is inserted into the scheduling unit, then symbol interference is managed, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies cyclic prefix insertion selectively and partially within the scheduling unit structure. Rather than inserting CP to every symbol, the system determines optimal CP placement based on channel characteristics and mobility conditions, reducing the overhead impact while maintaining interference management benefits.
Data Source
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AI summary
The present disclosure relates to the technical field of communications, and provides a communication resource determination method and apparatus and a device. The method comprises: determining a scheduling unit of a delay-Doppler (DD) domain, wherein the scheduling unit is used for a orthogonal time-frequency space (OTFS) modulation system. According to the method disclosed in the present disclosure, a scheduling unit of a DD domain is determined, so that the design of a scheduling unit for an OTF system in the DD domain is realized, a signal and/or data can be mapped to the designed scheduling unit, and thus communication tasks such as signal an/or data transmission are carried out by utilizing the scheduling unit.