Target BLER Control for Feedback Channel Reliability
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Solution Overview
Problem
Existing communication systems face inefficiencies in resource utilization due to stringent reliability requirements for cyber-physical applications, particularly in ultra-reliable low-latency communication (URLLC), leading to conservative transmission attributes that drain network resources.
Innovation Solution
Implementing a method to determine separate target block error rate (BLER) values for normal and survival modes based on service availability and feedback channel reliability, using link quality and physical control channel attributes to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stringent reliability requirements are applied to ensure service availability for cyber-physical applications, then reliability is improved, but network resource consumption increases due to conservative transmission attributes
Solution Approach 1:
The patent applies dynamics by introducing two distinct target BLER values that adapt to different operational modes (normal mode and survival mode). The system dynamically switches between these BLER values based on the operational state, allowing the transmission strategy to adjust reliability requirements according to actual needs rather than using a fixed conservative approach throughout all conditions.
Solution Approach 2:
The patent changes the parameter of target block error rate (BLER) by establishing different BLER values for different operational modes. In normal mode, a higher BLER threshold is used, while in survival mode, a lower BLER threshold is applied. This parameter change allows the system to optimize resource utilization by adjusting reliability expectations based on the current operational context.
2Reliability
If conservative transmission attributes are used to meet reliability requirements, then reliability is improved, but radio resource utilization efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts transmission attributes by switching between different target BLER values based on operational mode. In normal mode, the system uses less conservative transmission attributes to improve resource utilization, while in survival mode, it switches to more conservative attributes to ensure reliability, thus optimizing the balance between productivity and reliability.
Solution Approach 2:
The patent changes the transmission parameter of target BLER to optimize the balance between reliability and resource utilization. By implementing mode-dependent BLER values, the system can use more aggressive (higher BLER threshold) transmission parameters in normal conditions to improve productivity, while reserving conservative parameters for survival mode when reliability is critical.
3Device complexity
If a single target block error rate value is used for all operation modes, then device complexity is reduced, but adaptability to varying reliability needs deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the operational modes into distinct categories (normal mode and survival mode), each with its own target BLER value. This segmentation allows the system to handle different reliability requirements appropriately while maintaining relatively simple configuration logic, as each mode has a dedicated BLER value rather than requiring complex dynamic calculation.
Solution Approach 2:
The system changes the BLER parameter based on operational mode to achieve adaptability. By maintaining separate BLER values for different modes, the system can adapt to varying reliability needs without implementing complex dynamic adjustment mechanisms, thus balancing adaptability with configuration simplicity.
Data Source
AI summary
Disclosed is a method including identifying a service availability requirement and a survival time requirement for a terminal device, estimating a reliability level of a feedback channel associated with the terminal device based at least partly on a link quality and one or more physical control channel attributes associated with the terminal device, and determining a first target block error rate value for a first operation mode of the terminal device and a second target block error rate value for a second operation mode of the terminal device based at least partly on the service availability requirement, the survival time requirement, and the estimated reliability level of the feedback channel.