Base Station RAN Slice TTI Mapping Single Numerology
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Solution Overview
Problem
Current radio access networks face complexity in supporting diverse Quality of Service (QoS) requirements for different services like URLLC, mMTC, and eMBB due to the need for mixed numerologies, which complicates synchronization, resource management, and standardization.
Innovation Solution
Implementing a method where a base station maps different Transmission Time Interval (TTI) configurations to distinct RAN slices within a single carrier, using a single numerology for OFDM symbols, allowing for dynamic resource sharing and optimized QoS fulfillment without the complexity of mixed numerologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mixed numerologies are used to support different QoS requirements for various services, then the ability to fulfill diverse QoS requirements is improved, but the system complexity increases
Solution Approach 1:
The patent divides the carrier into multiple RAN slices, each slice being assigned a specific TTI configuration suited for particular service types (e.g., short TTI for URLLC, long TTI for eMBB). This segmentation allows different QoS requirements to be met within each slice while maintaining a single numerology at the physical layer, thus reducing overall system complexity.
Solution Approach 2:
Instead of varying numerology (frequency domain parameter) to support different services, the patent introduces a new dimension of TTI configuration (time domain parameter) to differentiate service types. This allows the system to maintain a single numerology while still providing diverse QoS support through different TTI lengths assigned to different RAN slices.
2Adaptability or versatility
If mixed numerologies are used to support different QoS requirements, then service adaptability is improved, but synchronization complexity increases
Solution Approach 1:
The patent merges the synchronization function at the OFDM symbol level across all RAN slices, using a single numerology for all slices. This eliminates the need for separate synchronization mechanisms for each numerology type, significantly reducing synchronization complexity while still allowing different TTI configurations for different services.
3Adaptability or versatility
If mixed numerologies are used to support different QoS requirements, then QoS fulfillment capability is improved, but resource management complexity increases
Solution Approach 1:
The patent implements dynamic resource management within each TTI-configured RAN slice, where resources can be flexibly allocated and adjusted based on real-time service demands. The base station can dynamically assign resources to different slices and adjust TTI configurations as needed, providing adaptive resource management without the complexity of managing multiple numerologies simultaneously.
Data Source
AI summary
A base station maps a first Transmission Time Interval (TTI) configuration associated with a carrier of a RAN to a first RAN slice. The first RAN slice is configured to support a first Quality of Service (QoS) requirement. The first TTI configuration comprises a first number of Orthogonal Frequency-Division Multiplexing (OFDM) symbols. The base station maps a second TTI configuration associated with the carrier to a second RAN slice. The second RAN slice is configured to support a second QoS requirement different from the first QoS requirement. The second TTI configuration comprises a second number of the OFDM symbols and is different from the first TTI configuration. The OFDM symbols with respect to the first and the second RAN slices are defined according to a single numerology. The base station informs a UE of the first and second TTI configurations mapped respectively to the first and second RAN slices.