Dynamic Target BLER Adjustment for Wireless Scheduling
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Solution Overview
Problem
Conventional wireless networks face inefficiencies due to static target Block Error Rate (BLER) settings, which fail to adapt to changing network conditions, leading to suboptimal performance in terms of transmission quality and user scheduling.
Innovation Solution
A method for dynamically adjusting the target BLER based on Physical Channel (PCH) blocking occurrence, using a load-aware control loop to modify the BLER for link adaptation, thereby optimizing network performance and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the target BLER for PDCCH is set to lower values to improve decoding reliability, then the reliability of PDCCH decoding is improved, but the number of WCDs that can be scheduled in a given TTI is reduced
Solution Approach 1:
The patent applies dynamics by making the target BLER parameter adjustable and adaptive rather than fixed. The system dynamically modifies the target BLER value based on real-time channel conditions, traffic load, and scheduling requirements, allowing the network to optimize between reliability and scheduling capacity depending on current operational needs
Solution Approach 2:
The patent changes the parameter of target BLER from a static configuration to a dynamic variable. By modifying this key parameter based on network conditions, the system can adjust the balance between PDCCH decoding reliability and the number of schedulable users, resolving the contradiction between these two opposing requirements
2Productivity
If the target BLER for PDCCH is set to higher values to increase the number of WCDs scheduled, then the number of WCDs that can be scheduled is improved, but the reliability of PDCCH decoding deteriorates
Solution Approach 1:
The system dynamically adjusts the target BLER parameter based on current network conditions, allowing it to increase when scheduling capacity is prioritized and decrease when decoding reliability becomes more important, thus resolving the contradiction between these competing objectives
Solution Approach 2:
The patent implements feedback mechanisms that monitor PDCCH decoding performance and scheduling effectiveness. This feedback information is used to adjust the target BLER parameter, creating a closed-loop control system that automatically optimizes the balance between reliability and scheduling capacity
3Device complexity
If static target BLER settings are used to simplify the system, then the device complexity is reduced, but the network efficiency and adaptability to changing conditions deteriorate
Solution Approach 1:
The patent transforms the static BLER configuration into a dynamic adjustment mechanism. Although this increases operational complexity, it enables the system to adapt to changing network conditions, traffic patterns, and channel quality, thereby significantly improving network efficiency and resource utilization
Solution Approach 2:
The system changes the BLER parameter from a fixed value to a dynamically adjustable parameter. This allows the network to optimize performance under varying conditions while maintaining manageable complexity through automated adjustment mechanisms rather than manual reconfiguration
Data Source
AI summary
Systems and methods of the present disclosure are directed to a method performed by a network node. The method includes determining whether Physical Channel (PCH) blocking has occurred for consecutive Transmission Time Intervals (TTIs) on a cell controlled by the network node, wherein PCH blocking occurs when Wireless Communication Devices (WCD) served by the cell cannot be scheduled for transmission in the cell due to unavailability of PCH resources in one or more consecutive TTIs. The method includes adjusting a target Block Error Rate (BLER) for link adaptation for a plurality of WCDs served by the cell based on whether PCH blocking has occurred for the plurality of consecutive TTIs on the cell to obtain a modified target BLER for link adaptation for the plurality of WCDs served by the cell.