Sidelink Carrier Aggregation Compatibility for Broadcast Services
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Solution Overview
Problem
The limited transmission and reception capabilities of terminal devices in LTE-based sidelink communication systems prevent them from receiving broadcast or multicast services when carrier aggregation is supported, leading to backward incompatibility issues.
Innovation Solution
Implementing a sidelink communication method that determines compatibility with carrier aggregation through transmission attributes, such as Tx profiles, to enable or disable carrier aggregation based on the compatibility of destination addresses for broadcast or multicast services, ensuring backwards compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is supported in LTE-based sidelink communication, then transmission capacity and service performance are improved, but terminal devices with limited reception capabilities cannot receive broadcast or multicast services, causing backward incompatibility
Solution Approach 1:
The patent applies dynamics by making the carrier aggregation configuration adjustable and conditional. The network device dynamically configures whether carrier aggregation is enabled for broadcast/multicast services based on terminal capabilities. Old terminals can operate in non-carrier-aggregation mode while new terminals utilize carrier aggregation, allowing the system to adapt to different terminal types and maintain backward compatibility while improving transmission capacity for capable devices
Solution Approach 2:
The patent changes the parameter of carrier aggregation configuration from a fixed system-wide setting to a flexible, terminal-specific parameter. By modifying the configuration parameter based on terminal reception capabilities, the system enables carrier aggregation for terminals that support it (improving productivity) while maintaining compatibility with terminals that don't support it (preserving adaptability)
2Productivity
If carrier aggregation is enabled for all services, then service performance is enhanced, but transmission complexity and configuration difficulty increase
Solution Approach 1:
The patent applies local quality by differentiating carrier aggregation configuration for different services and different terminal types. Instead of uniformly enabling carrier aggregation for all services, the system selectively applies it only to broadcast/multicast services for capable terminals, while keeping unicast services and incompatible terminals in simpler modes. This localized approach enhances service performance where needed without unnecessarily increasing configuration complexity system-wide
3Reliability
If carrier aggregation is used for broadcast services, then reception reliability is improved for capable terminals, but compatibility with old terminals is lost
Solution Approach 1:
The patent segments the terminal population into two groups based on carrier aggregation capability: new terminals with enhanced reception capabilities and old terminals with limited capabilities. The system then applies different carrier aggregation configurations to each segment - enabling it for new terminals to improve reception reliability while maintaining legacy configurations for old terminals to ensure compatibility. This segmentation resolves the contradiction by allowing both reliability improvement and compatibility maintenance simultaneously
Data Source
AI summary
Provided in the present disclosure are a sidelink communication method, a communication apparatus and a communication device. The method can comprise: when all Tx profiles associated with a first destination address correspond to compatible carrier aggregation, determining that the first destination address is compatible with carrier aggregation; and when at least one Tx profile associated with the first destination address corresponds to incompatible carrier aggregation, determining that the first destination address is incompatible with carrier aggregation, wherein the first destination address is a destination address of a first service, and the first service is a broadcast service or a multicast service.