Dynamic TTI Bundling Size for Carrier Aggregation
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Solution Overview
Problem
In wireless communication systems, the use of TTI bundling with carrier aggregation consumes more radio frequency spectrum and increases latency, as conventional systems employ a fixed bundling size across all component carriers, which may not be optimal due to varying conditions across carriers.
Innovation Solution
A method and system to dynamically determine and employ different bundling sizes for each component carrier based on specific conditions such as air interface quality, loading levels, and duplex mode, allowing for adaptive TTI bundling to optimize resource usage during carrier aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TTI bundling is used with carrier aggregation, then data transmission robustness is improved, but radio frequency spectrum consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed bundling size configuration to a dynamic determination mechanism. The network device determines bundling sizes adaptively based on real-time channel conditions, quality of service requirements, and carrier states. This allows the system to optimize spectrum usage by adjusting bundling sizes dynamically rather than applying a uniform fixed size across all component carriers, thereby resolving the contradiction between transmission robustness and spectrum consumption.
Solution Approach 2:
The patent implements parameter changes by modifying the bundling size parameter based on varying operating conditions. Different bundling sizes are determined for different component carriers according to their specific channel qualities, traffic loads, and QoS requirements. This parameter adaptation enables the system to maintain reliable transmission where needed while reducing spectrum consumption on carriers with better conditions, thus resolving the technical contradiction.
2Reliability
If TTI bundling is used with carrier aggregation, then data transmission robustness is improved, but latency increases
Solution Approach 1:
The patent applies dynamics by making the bundling size configurable and adaptable rather than fixed. The network device can determine smaller bundling sizes for carriers with good channel conditions or time-sensitive traffic, thereby reducing latency while maintaining robustness where needed. This dynamic adjustment resolves the contradiction between transmission reliability and latency by allowing flexible optimization based on real-time requirements.
Solution Approach 2:
The patent changes the bundling size parameter based on traffic type, channel conditions, and QoS requirements. For latency-sensitive applications, smaller bundling sizes can be determined, reducing the time loss while still providing robustness through carrier aggregation. This parameter flexibility directly addresses the contradiction between reliability improvement and latency increase.
3Device complexity
If a fixed bundling size is used across all component carriers, then system complexity is reduced, but resource usage efficiency decreases
Solution Approach 1:
The patent applies segmentation by determining bundling sizes independently for each component carrier rather than applying a single fixed size to all carriers. This segmentation allows the system to optimize resource usage on a per-carrier basis according to individual channel conditions and traffic requirements, thereby improving resource usage efficiency while maintaining manageable system complexity through a systematic determination approach.
Solution Approach 2:
The patent implements local quality by allowing different bundling sizes for different component carriers based on their specific conditions. Each carrier can have a customized bundling size optimized for its local characteristics such as channel quality, traffic load, and QoS requirements. This local optimization improves overall resource usage efficiency while the systematic determination method keeps system complexity acceptable.
Data Source
AI summary
According to aspects of the present disclosure, a method and system are provided for wireless communication between a user equipment device (UE) and a base station using carrier aggregation and transmission time internal (TTI) bundling. The base station serves the UE with carrier aggregation on multiple carriers and determines, per carrier, a respective bundling size for transmitting a wireless communication between the UE and the base station with transmission TTI bundling on that component carrier. The determined bundling size for at least one of the plurality of component carriers is different than the determined bundling size for another one of the plurality of component carriers. While serving the UE with carrier aggregation on the multiple carriers, the base station invokes TTI bundling to transmit the wireless communication between the UE and the base station on each carrier with the respectively determined bundling size for that component carrier.