Uplink Delay Reporting for LBT Channel Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless networks operating on unlicensed spectrum, dynamic uplink scheduling is challenged by interference and Listen-Before-Talk (LBT) protocols causing significant delays, leading to increased packet latency and inability to prioritize data packets meeting latency requirements.
Innovation Solution
An apparatus and method for performing channel availability monitoring on an operating channel, determining delay information related to this monitoring, and transmitting uplink control information and delay information to the radio access network, enabling informed scheduling decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Listen-Before-Talk (LBT) protocols are implemented on unlicensed spectrum channels, then channel access coordination is improved, but packet latency increases significantly
Solution Approach 1:
The patent applies preliminary action by performing channel availability monitoring and determining delay information before actual data transmission. The terminal device proactively monitors the operating channel and calculates delay metrics in advance, allowing the network to prepare scheduling decisions ahead of time, thereby reducing the impact of LBT protocol delays on overall packet latency.
Solution Approach 2:
The patent implements dynamics by making the uplink scheduling adaptive based on real-time channel availability and delay information. The network dynamically adjusts scheduling decisions according to the monitored channel conditions and calculated delay metrics, enabling flexible resource allocation that responds to changing unlicensed spectrum conditions rather than following rigid scheduling patterns.
2Adaptability or versatility
If dynamic uplink scheduling is implemented, then resource allocation flexibility is improved, but inability to prioritize latency-critical packets occurs
Solution Approach 1:
The patent applies feedback by having the terminal device measure and report delay information related to channel availability monitoring back to the network. This feedback loop enables the network to understand the actual timing conditions and use this information to make informed scheduling decisions that can prioritize latency-critical packets while maintaining resource allocation flexibility through dynamic scheduling.
3Reliability
If channel availability monitoring is performed frequently, then channel access reliability is improved, but transmission delay increases
Solution Approach 1:
The patent resolves this contradiction by performing channel availability monitoring and delay information determination as preliminary actions before data transmission is actually needed. By completing these monitoring and calculation tasks in advance, the system ensures reliable channel access information is available without adding delay to the critical data transmission path, as the monitoring occurs proactively rather than reactively.
Data Source
AI summary
An apparatus, method and computer program product for: performing channel availability monitoring on an operating channel for transmitting uplink control information for transmitting a data packet, in response to determining that the operating channel is available for transmitting the uplink control information, determining delay information relating to the channel availability monitoring, and transmitting the uplink control information and the delay information to the radio access network.