Scheduling Timeline in New Radio Spectrum Sharing
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Solution Overview
Problem
Current wireless communication systems face challenges in determining scheduling and transmission timelines in shared communication media, particularly when multiple network operating entities contend for transmission opportunities, leading to inefficiencies and potential collisions.
Innovation Solution
The proposed solution involves determining scheduling timelines using relative timing, allowing base stations to contend for and reserve transmission opportunities without needing knowledge of medium occupancy outside the current transmission opportunity, and enabling user equipment to skip over reserved time periods of other operators, thereby optimizing resource allocation and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If listen-before-talk procedure is used to avoid collisions in shared channel, then channel access reliability is improved, but transmission latency increases due to waiting for channel availability
Solution Approach 1:
The base station performs preliminary actions by determining a scheduling timeline during the current TXOP that extends into future time periods, including future TXOPs. This allows the UE to be scheduled in advance for future transmissions, so that when the future TXOP arrives, the UE is already ready to transmit without waiting for additional scheduling decisions, thereby reducing latency while maintaining reliable channel access through LBT
2Adaptability or versatility
If scheduling is based on relative timing, then scheduling flexibility is improved, but transmission timing accuracy deteriorates when transmission time falls outside current TXOP
Solution Approach 1:
The patent extends the scheduling timeline from a single-dimension current-TXOP-based timing to a multi-dimensional timeline that spans multiple TXOPs of the same base station. By determining scheduling information during current TXOP for future TXOPs and using absolute timing references for future transmissions, the system maintains both the flexibility of relative timing within TXOPs and the accuracy of absolute timing across TXOP boundaries
3Productivity
If base station reserves transmission opportunity for extended duration, then resource allocation efficiency is improved, but medium access fairness deteriorates by blocking other operators
Solution Approach 1:
The scheduling timeline is segmented into multiple discrete TXOPs rather than one continuous reservation. The base station determines scheduling information during current TXOP that spans into future TXOPs, allowing other operators to access the medium in between these scheduled TXOPs. This segmentation maintains high resource allocation efficiency for the scheduling base station while preserving medium access fairness for other operators by not blocking them continuously
Data Source
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AI summary
Wireless communications systems and methods related to determining scheduling and transmission timeline for communicating in a shared communication medium are provided. A first wireless communication device communicates, with a second wireless communication device, scheduling information during a first time period of a first transmission opportunity (TXOP) of a first network operating entity in a shared communication medium, the scheduling information indicating an offset time period relative to the first time period. The first wireless communication device communicates, with the second wireless communication device, a communication signal during a second TXOP subsequent to the first TXOP based on the offset time period.