Scheduling Request Prohibit Timer in Non-Terrestrial Networks
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently managing bandwidth and resource allocation across diverse wireless devices and base stations, particularly in non-terrestrial networks where propagation delays and varying conditions complicate real-time communication.
Innovation Solution
The implementation of advanced bandwidth adaptation techniques using multiple configured bandwidth parts (BWPs) and dynamic BWP switching, combined with efficient beam management and random access procedures, enables optimal resource allocation and adaptability in wireless communication networks, including non-terrestrial scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bandwidth adaptation techniques with multiple configured bandwidth parts are implemented, then network efficiency and resource allocation are improved, but device complexity and configuration management increase
Solution Approach 1:
The patent divides the total bandwidth into multiple configured bandwidth parts (BWPs), each with specific parameters such as subcarrier spacing, cyclic prefix length, and frequency range. This segmentation allows the network to allocate only the necessary bandwidth portions to devices based on their specific needs, improving network efficiency while managing complexity through structured division of resources.
Solution Approach 2:
The patent implements dynamic BWP switching mechanisms that allow devices to transition between different bandwidth parts based on real-time traffic conditions, device capabilities, and network state. This dynamic adaptation enables the system to optimize resource allocation continuously, improving productivity while the automated switching reduces the burden of manual configuration management.
2Productivity
If dynamic BWP switching is implemented to adapt to traffic conditions, then resource allocation efficiency improves, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent employs feedback mechanisms where devices report their traffic conditions, channel quality, and BWP performance metrics to the network. The network uses this feedback to make informed decisions about BWP switching, optimizing resource allocation efficiency while reducing processing complexity through data-driven automated decisions rather than exhaustive searches.
Solution Approach 2:
The patent pre-configures multiple bandwidth parts with different parameters before runtime, preparing various resource allocation scenarios in advance. When traffic conditions change, the system can quickly switch between pre-configured BWPs rather than performing complex real-time calculations, thereby improving resource allocation efficiency while minimizing processing complexity during operation.
3Adaptability or versatility
If multiple bandwidth parts with different parameters are configured, then adaptability to diverse device capabilities improves, but configuration management and coordination difficulty increase
Solution Approach 1:
The patent assigns different bandwidth part configurations tailored to specific device capabilities, traffic patterns, and service requirements. Each BWP is optimized with appropriate subcarrier spacing, cyclic prefix length, and frequency allocation based on local conditions, improving adaptability to diverse devices while the network manages the complexity through centralized configuration policies.
Data Source
AI summary
A wireless device may start a scheduling request (SR) prohibit timer based on transmitting an SR for a transport block. The wireless device may receive, while the SR prohibit timer is running, downlink control information (DCI) indicating an uplink resource for the transport block. The wireless device may start a time window, with a duration based on a delay of a non-terrestrial network, in response to: expiration of the SR prohibit timer; the uplink resource occurring, in time, after the expiration of the SR prohibit timer; and the SR being pending. The wireless device may refrain from retransmitting the SR during the time window. The wireless device may stop the time window in response to transmitting, via the uplink resource, the transport block.