Distributed DU Resource Pre-emption for Real-Time Data Routing
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Solution Overview
Problem
Current mobile network architectures face challenges in efficiently allocating transmission resources to handle urgent data transmissions, as the centralized CU entity requires time to process and update scheduling tables, leading to delays incompatible with real-time applications.
Innovation Solution
The method allows a distributed DU entity to modify resource allocations and select transmission characteristics from a set provided by the CU, enabling the preemptive allocation of resources for urgent data transmissions while ensuring both applications' data is transmitted effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the centralized CU entity processes and updates scheduling tables to allocate transmission resources, then resource allocation is centralized and controlled, but transmission latency increases and real-time data routing is delayed
Solution Approach 1:
The patent segments the resource allocation function by separating the CU (Centralized Unit) and DU (Distributed Unit). The CU maintains overall control and provides scheduling tables, while the DU performs local pre-emption of resources for real-time data. This segmentation allows the CU to focus on centralized control while the DU handles time-critical decisions, resolving the contradiction between centralized control and low latency.
Solution Approach 2:
The DU performs preliminary actions by pre-empting transmission resources before the CU's scheduling table updates take effect. The DU can allocate resources for real-time data immediately when needed, without waiting for the CU's processing cycle. This preliminary action at the DU level eliminates the latency bottleneck while the CU continues its centralized management.
2Speed
If the DU entity pre-emptively allocates resources for urgent data, then transmission speed increases, but resource allocation complexity increases
Solution Approach 1:
The patent applies local quality by enabling the DU to perform pre-emption only for real-time data with specific QoS requirements, while non-real-time data continues to follow the CU's centralized scheduling. The DU has enhanced resource allocation capabilities locally, but only activates them when needed for time-critical transmissions. This localized enhancement increases speed for urgent data without making the entire system complex.
3Adaptability or versatility
If multiple transmission characteristics are provided for the second application, then adaptability increases, but information processing overhead increases
Solution Approach 1:
The patent implements partial action by providing the DU with a limited set of pre-defined transmission characteristics (MCS indices) for the second application instead of all possible characteristics. The CU provides a scheduling table with a subset of relevant MCS options, and the DU selects from this partial set based on real-time conditions. This partial provision reduces information processing overhead while maintaining sufficient adaptability for real-time resource pre-emption.
Data Source
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AI summary
A method for allocating at least one transmission resource from among a plurality of resources, designed to route a first item of data relating to a first application in a communication infrastructure. The method is implemented in a distributed entity for managing the plurality of resources and comprises a step of receiving, from a centralized management entity (10), a message allocating a plurality of resources (M1) comprising a set of transmission features (M1/B1, M1/B2) of a second item of data relating to a second application, and a step of assigning at least one resource (L2) of the plurality to the transmission of the first item of data. The method further comprises a step of selecting a feature (M1/B2) of the set for the transmission of the second item of data on the resources (M2) of the plurality that are not assigned to the transmission of the first item of data.