UE Wireless Communication Resource Allocation on Unlicensed Spectrum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE systems, uplink transmission on unlicensed spectrum is limited by the need for Listen Before Talk (LBT) and scheduled time-frequency resources, leading to resource wastage and reduced transmission opportunities when subbands are partially idle, especially in scenarios with multiple subbands.
Innovation Solution
A method where a UE determines available frequency-domain resources through listening and transmits radio signals in time-domain resources, allowing flexible use of subbands and extending transmission time when resources are narrow, enabling efficient spectrum use and improved transmission opportunities by dynamically adjusting bit block transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station schedules uplink transmission on unlicensed spectrum using definite time-frequency resources, then the base station can easily receive and schedule transmissions, but the transmission will fail when the scheduled resources are not idle due to LBT requirements
Solution Approach 1:
The patent implements dynamic resource allocation where the base station schedules uplink transmissions on unlicensed spectrum by dynamically selecting time-frequency resources based on current channel conditions and LBT outcomes. The scheduler adjusts resource assignments in real-time to match available idle subbands, transforming the static scheduling approach into a dynamic adaptation mechanism that responds to changing spectral availability.
Solution Approach 2:
The system incorporates feedback loops where the base station receives LBT outcome information from UEs and uses this feedback to adjust subsequent scheduling decisions. The scheduler monitors which subbands are idle and uses this feedback to allocate resources efficiently, creating a closed-loop control system that continuously optimizes uplink transmission reliability on unlicensed spectrum.
2Productivity
If the UE gives up transmission when partial subbands are idle after LBT, then the base station receives transmissions reliably, but resource utilization and transmission opportunities are significantly reduced
Solution Approach 1:
The patent segments the unlicensed spectrum into multiple subbands and enables the UE to perform LBT independently on each subband. When partial subbands are found to be idle, the system transmits only on those specific subbands rather than abandoning the entire transmission opportunity. This segmentation allows selective utilization of available spectral resources, improving both productivity and reducing energy wastage.
Solution Approach 2:
The system applies local quality by allowing transmission on specific idle subbands while remaining silent on occupied subbands. Instead of treating the entire frequency spectrum uniformly, the patent enables differentiated transmission behavior across different subbands based on their individual LBT outcomes, maximizing resource utilization while maintaining transmission reliability.
3Productivity
If the UE performs LBT on multiple subbands and transmits on all idle subbands, then spectrum efficiency is improved, but the complexity of determining and managing frequency-domain resources increases
Solution Approach 1:
The patent implements partial action by having the UE perform LBT on multiple subbands and transmit only on the subset of subbands that are found to be idle. Rather than requiring LBT and transmission on all subbands, the system selectively activates transmission on idle subbands, achieving improved spectrum efficiency without the full complexity of managing all subbands simultaneously.
Solution Approach 2:
The system adds the frequency dimension to resource management by enabling independent LBT and transmission decisions across multiple subbands. This dimensional expansion allows the UE to exploit frequency diversity and transmit on multiple idle subbands simultaneously, improving spectrum efficiency while the base station's scheduling algorithms manage the increased complexity through systematic resource allocation.
Data Source
AI summary
The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE first receives a first signaling, the first signaling being used for determining a number of bits included in a first bit block; then the UE performs first listening to determine that a first frequency-domain resource set is available for wireless transmission; and finally the UE transmits a first radio signal in a first time-domain resource set of the first frequency-domain resource set; a second bit block is used for generating the first radio signal, and the second bit block is obtained after the first bit block is processed through channel coding; and the first time-domain resource set is related to a number of bits not transmitted in a current second bit block and the first frequency-domain resource set. The disclosure improves opportunities of transmission on unlicensed spectrum.