Radio Base Station Scheduler TTI Allocation
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Solution Overview
Problem
The use of multiple transmission time intervals (TTIs) with different lengths in mobile communication systems complicates device configurations and signal processing, making it challenging to manage communication device configurations and product testing processes effectively.
Innovation Solution
A radio base station is designed with a scheduler that allocates resource blocks using a predetermined bandwidth and TTI, reporting scheduling information to user devices, where downlink data and control channels are transmitted using one TTI, and uplink control channels are transmitted using an integral multiple of TTI, simplifying configurations and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TTIs with different lengths are used to optimize for both short TTI (low control delay) and long TTI (high uplink signal quality), then communication flexibility is improved, but device configuration complexity and signal processing complexity increase
Solution Approach 1:
The patent segments the transmission time interval into two distinct types: downlink TTI (TTI_DL) and uplink TTI (TTI_UL). This segmentation allows each TTI type to be independently optimized for its specific function while maintaining a clear structural boundary, thereby reducing the complexity of managing multiple TTI configurations. The downlink TTI is used for data transmission with flexible length adaptation, while the uplink TTI is specifically designed for control signal transmission with fixed timing relationships.
Solution Approach 2:
The patent applies different TTI length characteristics to different parts of the communication system: downlink channels can use variable TTI lengths optimized for data throughput and latency requirements, while uplink control channels use fixed TTI lengths optimized for timing synchronization. This local optimization allows each part of the system to have the TTI characteristics best suited for its specific function, improving overall system performance without requiring all components to support all TTI configurations.
2Adaptability or versatility
If multiple TTIs with different lengths are used to optimize for both short TTI (low control delay) and long TTI (high uplink signal quality), then communication flexibility is improved, but signal processing complexity increases
Solution Approach 1:
The patent segments the transmission time interval into two distinct types: downlink TTI (TTI_DL) and uplink TTI (TTI_UL). This segmentation allows each TTI type to be independently optimized for its specific function while maintaining a clear structural boundary, thereby reducing the complexity of managing multiple TTI configurations. The downlink TTI is used for data transmission with flexible length adaptation, while the uplink TTI is specifically designed for control signal transmission with fixed timing relationships.
Solution Approach 2:
The patent applies different TTI length characteristics to different parts of the communication system: downlink channels can use variable TTI lengths optimized for data throughput and latency requirements, while uplink control channels use fixed TTI lengths optimized for timing synchronization. This local optimization allows each part of the system to have the TTI characteristics best suited for its specific function, improving overall system performance without requiring all components to support all TTI configurations.
3Adaptability or versatility
If multiple TTIs with different lengths are used to optimize for both short TTI (low control delay) and long TTI (high uplink signal quality), then communication flexibility is improved, but testing process complexity increases
Solution Approach 1:
The patent segments the transmission time interval into two distinct types: downlink TTI (TTI_DL) and uplink TTI (TTI_UL). This segmentation allows each TTI type to be independently optimized for its specific function while maintaining a clear structural boundary, thereby reducing the complexity of managing multiple TTI configurations. The downlink TTI is used for data transmission with flexible length adaptation, while the uplink TTI is specifically designed for control signal transmission with fixed timing relationships.
4Reliability
If long TTI is used to increase cell area and improve uplink signal quality, then control channel quality is improved, but control delay increases
Solution Approach 1:
The patent applies different TTI length characteristics to different parts of the communication system: downlink channels can use variable TTI lengths optimized for data throughput and latency requirements, while uplink control channels use fixed TTI lengths optimized for timing synchronization. This local optimization allows each part of the system to have the TTI characteristics best suited for its specific function, improving overall system performance without requiring all components to support all TTI configurations.
Data Source
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AI summary
A radio base station used in a mobile communication system is disclosed. The radio base station includes a scheduler configured to allocate one or more resource blocks, which are defined by a predetermined bandwidth and a predetermined transmission time interval, to a user device; and a reporting unit configured to report scheduling information indicating radio resource allocation to the user device. The scheduler is configured to generate the scheduling information such that downlink data channels and downlink control channels are transmitted using the transmission time interval as a transmission unit and uplink control channels are transmitted using an integral multiple of the transmission time interval as a transmission unit.