Dynamic HARQ Configuration for Network Adaptability
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Solution Overview
Problem
The hybrid automatic repeat request (HARQ) protocol in telecommunications networks has fixed delay requirements that limit network architectures and services, making it challenging to accommodate varying use cases and network configurations, particularly in LTE and LTE-Advanced networks.
Innovation Solution
Implementing a dynamic configuration of HARQ parameters based on multiple factors such as network metrics, RAN split, user equipment capabilities, and application quality of service requirements, allowing for flexible network architectures and resource centralization, thereby enabling reduced computing resource utilization and cost-efficient designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed delay requirements are imposed on HARQ protocol, then reliability of message transmission is improved, but adaptability to different network architectures and use cases deteriorates
Solution Approach 1:
The patent applies dynamics by making HARQ delay requirements configurable rather than fixed. The network management device dynamically adjusts HARQ parameters including delay requirements based on network conditions, architecture type (CU-UP/CU-CP separation, RAN intelligence), and service requirements, allowing the system to adapt between strict reliability modes and flexible adaptability modes
Solution Approach 2:
The patent changes the parameter of HARQ delay requirement from a fixed value to a configurable parameter. The network management device modifies HARQ parameters such as delay requirements, process numbers, and repetition numbers according to different network architectures and service types, enabling the system to optimize between reliability and adaptability based on actual needs
2Productivity
If HARQ functionality is centralized in CU-UP, then resource utilization efficiency is improved, but latency in front-haul connection deteriorates
Solution Approach 1:
The patent applies segmentation by dividing HARQ functionality into separate configurable components. The network management device can configure different numbers of HARQ processes and distribute them across CU-UP and distributed units, allowing resource pooling benefits of centralization while reducing latency through strategic distribution of specific HARQ processes closer to the radio interface
Solution Approach 2:
The patent introduces a new dimension of configurability by allowing dynamic allocation of HARQ processes across different network locations (CU-UP and distributed units). This multi-dimensional configuration enables the system to optimize resource utilization efficiency in one dimension while managing latency in another dimension through flexible process distribution
3Speed
If HARQ configuration is optimized for low latency, then speed of message transmission is improved, but reliability under varying network conditions deteriorates
Solution Approach 1:
The patent applies feedback by implementing dynamic HARQ configuration where the network management device continuously monitors network conditions, service requirements, and performance metrics, then adjusts HARQ parameters including delay requirements and process numbers in real-time to optimize both speed and reliability based on current state
Data Source
AI summary
A device may determine one or more parameters relating to a network. The device may detect a trigger to alter a hybrid automatic repeat request (HARQ) configuration for the network based on the one or more parameters relating to the network. The device may determine an alteration to the HARQ configuration based on detecting the trigger to alter the HARQ configuration. The device may communicate with a distributed unit or a centralized unit of the network to cause the alteration to the HARQ configuration.