Sidelink Carrier Aggregation with Dynamic Component Carrier Selection
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Solution Overview
Problem
Existing sidelink communication systems face challenges in dynamically allocating frequency-domain resources for carrier aggregation due to limitations in UE reception capabilities, necessitating improved protocols for selecting suitable component carriers to achieve high reliability, low latency, and increased data rates.
Innovation Solution
A method involving wireless communication nodes exchanging information to determine resource allocation for sidelink communication, including receiving and transmitting signals containing assistance information and threshold values to select suitable component carriers based on service type, quality of service requirements, and link quality, enabling dynamic allocation of carriers for carrier aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UEs are limited with their reception capabilities (number of supported CCs), then device complexity and cost are reduced, but the ability to achieve high data rates and capacity through carrier aggregation is compromised
Solution Approach 1:
The patent implements dynamic carrier selection where UEs can adaptively choose from multiple component carriers based on current channel conditions, service requirements, and available resources. The system dynamically adjusts the number and configuration of active carriers rather than being fixed, allowing UEs to optimize between complexity and data rate based on real-time needs
Solution Approach 2:
The system changes operational parameters including the number of active component carriers, frequency selections, and carrier configurations based on service types and channel conditions. This allows the same UE hardware to achieve different data rates by reconfiguring which carriers are actively used, effectively decoupling hardware limitations from performance outcomes
2Productivity
If more component carriers are combined for carrier aggregation, then peak data rates and network capacity are increased, but the difficulty of detecting and measuring suitable carriers and managing resource allocation increases
Solution Approach 1:
The patent introduces intermediary elements including predefined mapping relationships between service types and frequencies, assistance information messages exchanged between UEs, and network-configured parameters that guide carrier selection. These intermediaries simplify the complex task of identifying suitable carriers by providing structured guidance rather than requiring UEs to independently evaluate all possible carriers
Solution Approach 2:
The system performs preliminary actions by pre-configuring mapping relationships between service types and suitable frequency ranges, and by having UEs pre-identify and report their capability-supported frequencies to the network. This preliminary preparation reduces the real-time complexity of carrier aggregation setup by having much of the selection work done in advance
3Adaptability or versatility
If dynamic resource allocation protocols are implemented for PC5-CA, then adaptability to different service types and channel conditions is improved, but the device complexity and protocol overhead increase
Solution Approach 1:
The patent applies different resource allocation and carrier selection strategies tailored to specific service types (e.g., V2X, broadband, control signaling). Each service type receives customized configuration parameters and frequency mappings appropriate to its requirements, rather than using a one-size-fits-all approach. This localized optimization achieves high adaptability without requiring the entire system to be maximally complex
Data Source
AI summary
A method and apparatus for carrier aggregation is disclosed. In one embodiment, a method performed by a first wireless communication node, comprising: receiving a downlink signal containing first information from a second wireless communication node, and based on at least a portion of the first information, determining first resource information to perform sidelink communication between the first wireless communication node and at least one third wireless communication node.