Sidelink Carrier Aggregation Feedback Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face interference and congestion issues due to increased demand for mobile broadband access, leading to degraded performance in sidelink carrier aggregation feedback operations, particularly in scenarios where UEs do not coordinate their feedback transmissions effectively across different component carriers.
Innovation Solution
The implementation of enhanced sidelink carrier aggregation feedback operations, where wireless communication devices receive sidelink shared channel transmissions on one component carrier and transmit feedback on a different component carrier, using feedback resource indications to determine unique transmission resources, thereby reducing collisions and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple UEs transmit feedback on the same component carrier, then feedback reporting is simplified, but collisions between feedback transmissions increase
Solution Approach 1:
The patent segments the feedback transmission resources by assigning different UEs to different component carriers for feedback reporting. Specifically, when a first UE receives data on a first component carrier, it transmits feedback on a second component carrier, while a second UE receiving data on the first component carrier transmits feedback on a third component carrier. This segmentation distributes the feedback load across multiple carriers, reducing collisions while maintaining operational simplicity.
Solution Approach 2:
The patent introduces an additional dimension for feedback transmission by utilizing multiple component carriers instead of confining all feedback to a single carrier. By mapping feedback transmissions to different frequency resources (component carriers), the system expands the resource dimension available for feedback reporting, thereby reducing interference and collisions between simultaneous feedback transmissions from multiple UEs.
2Device complexity
If feedback is transmitted on the same component carrier as data reception, then resource allocation is simplified, but interference and congestion increase
Solution Approach 1:
The patent introduces component carriers as intermediary resources for feedback transmission. Instead of directly transmitting feedback on the same carrier as data reception (which causes interference), the system uses a different component carrier as an intermediary channel. This intermediary approach separates data transmission and feedback transmission in the frequency domain, reducing interference while the network maintains simplified resource allocation through configured carrier mappings.
Data Source
AI summary
This disclosure provides systems, methods, and devices for wireless communication that support enhanced sidelink carrier aggregation feedback operations. In a first aspect, a method of wireless communication includes receiving, by a wireless communication device, a sidelink shared channel transmission via a first component carrier. The method also includes obtaining, by the wireless communication device, a feedback resource indication. The method further includes transmitting, by the wireless communication device, a sidelink channel feedback transmission in a sidelink channel feedback transmission resource via a second component carrier different from the first component carrier. The sidelink channel feedback transmission resource is determined based on the feedback resource indication, and the sidelink channel feedback transmission indicates feedback data for the sidelink shared channel transmission. Other aspects and features are also claimed and described.