V2X Sidelink Carrier Aggregation Interruption Handling
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Solution Overview
Problem
Current 3GPP standards do not specify delay and interruption requirements for vehicle-to-everything (V2X) sidelink carrier aggregation (CA), leading to uncertainties in communication disruptions and processing times during component carrier additions or releases in wireless communication systems.
Innovation Solution
Introduce specific delay and interruption requirements for V2X sidelink CA, allowing up to one subframe interruption for sidelink communications, up to two subframes for cellular communications, and defining delay times for component carrier addition or release processes, including RRC processing and RF tuning times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If component carrier addition or release is performed in V2X sidelink CA, then carrier aggregation capability is improved, but communication interruption and delay occur
Solution Approach 1:
The patent performs RF tuning and RRC processing in advance before component carrier addition or release operations. By preparing the radio frequency chain and processing configuration messages beforehand, the system minimizes actual communication interruption time while maintaining carrier aggregation adaptability.
Solution Approach 2:
The patent implements dynamic interruption and delay requirements that adapt to different component carrier operations. The interruption time is set to one subframe for sidelink communications and two subframes for cellular communications, providing flexible timing that balances carrier aggregation flexibility with communication continuity.
2Adaptability or versatility
If RF tuning is performed for component carrier addition or release, then frequency switching capability is improved, but processing time increases
Solution Approach 1:
The patent performs RF tuning operations in advance of actual component carrier activation. By preparing the radio frequency chain beforehand, the system enables rapid frequency switching when component carriers are added or released, reducing the impact on real-time communication.
Solution Approach 2:
The patent changes RF parameters including center frequency and aggregated bandwidth during component carrier operations. These parameter adjustments are performed with defined interruption times, allowing the system to adapt frequency settings while controlling the time penalty through standardized subframe interruptions.
3Reliability
If interruption time is reduced for component carrier operations, then communication continuity is improved, but RF configuration capability is limited
Solution Approach 1:
The patent implements dynamic interruption timing that adapts to the specific component carrier operation being performed. By setting interruption to one subframe for sidelink and two subframes for cellular communications, the system maintains communication continuity while providing sufficient time for RF configuration and tuning operations.
Solution Approach 2:
The patent defines specific parameter changes for RF chain configuration including center frequency adjustment and aggregated bandwidth modification. These parameter changes are performed within the defined interruption windows, enabling full RF configuration capability while maintaining acceptable communication continuity through standardized timing parameters.
Data Source
AI summary
Systems and methods provide solutions for delay and interruption requirements for vehicle-to-everything (V2X) sidelink carrier aggregation (CA). For example, when any number of component carriers is added for V2X CA, a user equipment (UE) capable of V2X sidelink communication is allowed an interruption of up to two subframes to the cellular network. The interruption may be for both uplink and downlink of a serving cell or primary cell.