Wireless Resource Scheduling with Power Restriction Handling
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Solution Overview
Problem
Current resource allocation in wireless communication systems does not account for maximum power reduction and additional maximum power reduction, leading to wastage of uplink grants and coverage loss due to power limiting situations, particularly in scenarios like PRACH transmission where resources are allocated without considering these power constraints.
Innovation Solution
A method and arrangement in a base station that schedules physical resources based on performance requirement power restriction values, including path loss thresholds, to optimize resource allocation and minimize power reduction, thereby improving resource utilization and reducing coverage loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resources are allocated without considering maximum power reduction and additional maximum power reduction, then resource allocation is simplified, but uplink grants are wasted and coverage loss occurs
Solution Approach 1:
The patent applies local quality by differentiating resource blocks based on their specific power restriction requirements. Different resource blocks are identified and treated differently according to whether they are subject to maximum power reduction or additional maximum power reduction, allowing optimized resource allocation that accounts for local power constraints in specific frequency regions
Solution Approach 2:
The patent implements dynamics by making resource allocation adaptive to varying power restriction conditions. The eNodeB dynamically determines which resource blocks require power restrictions based on transmission parameters and regulatory requirements, and adjusts resource allocation decisions in real-time based on the actual power restriction status of each resource block
2Object-affected harmful factors
If maximum power reduction is applied to ensure out of band emission requirements, then OOB emission requirements are met, but coverage loss and call blocking increase
Solution Approach 1:
The patent segments the frequency spectrum into different resource blocks based on their power restriction requirements. By dividing the bandwidth into resource blocks that are subject to maximum power reduction versus additional maximum power reduction, the system can apply appropriate power restrictions locally without unnecessarily reducing power across the entire bandwidth, thereby maintaining coverage
Solution Approach 2:
The patent changes the power transmission parameter dynamically based on the specific resource block being used. Instead of applying a uniform power reduction across all resource blocks, the system adjusts the power level according to the specific power restriction requirements of each resource block, optimizing the balance between OOB emission compliance and coverage maintenance
3Object-affected harmful factors
If additional maximum power reduction is applied in band 13 to meet regulatory requirements, then spectrum emission requirements are satisfied, but PRACH transmission reliability deteriorates
Solution Approach 1:
The patent segments PRACH resources into different sets based on their power restriction characteristics. By identifying which PRACH resources are located in band 13 and subject to additional maximum power reduction, the system can apply power restrictions selectively to those specific resources while maintaining normal power levels for PRACH resources in other bands, thereby preserving PRACH transmission reliability
Solution Approach 2:
The patent applies preliminary action by pre-identifying and pre-configuring PRACH resources that will be subject to additional maximum power reduction before actual transmission occurs. The eNodeB determines in advance which PRACH resources require power restrictions based on their frequency location in band 13, allowing the UE to prepare appropriate transmission parameters beforehand
Data Source
AI summary
Method and arrangement in a base station for scheduling physical resources in a transmission bandwidth to a user equipment served by the base station. The physical resources may be physical channels or radio resource blocks. Some physical resources within the transmission bandwidth are subjected to a performance requirement power restriction value. The method comprises scheduling physical resources based on the performance requirement power restriction value of the physical resources to be scheduled. Also, a method and arrangement in a user equipment for assisting a base station in scheduling physical resources in a transmission bandwidth to the user equipment is described.