Sidelink Resource Allocation Using Interference Cancellation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating sidelink resources, particularly in environments with varying interference cancellation capabilities among user equipment (UEs).
Innovation Solution
A method and apparatus for a user equipment (UE) to receive capability information indicating interference cancellation (IC) capabilities, receive sidelink control information (SCI) for resource reservation, and transmit indications of reserved resources based on IC capabilities and resource reservation information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional sidelink resource allocation is used without considering IC capabilities, then resource allocation is simple and uniform, but resource utilization efficiency deteriorates and data throughput decreases
Solution Approach 1:
The patent applies local quality by differentiating resource allocation strategies based on the IC capabilities of specific UEs. UEs with IC capabilities are allocated resources that may experience interference, while UEs without IC capabilities receive resources with lower interference exposure. This localized adaptation to individual UE characteristics improves overall system throughput without requiring complete redesign of the resource allocation framework.
Solution Approach 2:
The patent implements dynamic resource allocation by adjusting resource assignments based on real-time IC capability information and interference conditions. The base station dynamically modifies which UEs can use which resources depending on their IC capabilities and current channel conditions, allowing the system to adapt to changing traffic patterns and interference environments while maintaining optimal throughput.
2Productivity
If resource reservation is made without IC capability consideration, then allocation process is straightforward, but resource waste increases due to failed receptions
Solution Approach 1:
The patent applies preliminary action by having UEs report their IC capabilities to the base station in advance, before resource allocation occurs. The base station stores this capability information and uses it to make informed resource reservation decisions. This preliminary gathering of capability information allows the system to avoid allocating interfering resources to UEs that cannot handle such interference, thereby reducing resource waste from failed receptions.
Solution Approach 2:
The patent implements feedback mechanisms where UEs provide IC capability information to the base station, which then uses this feedback to optimize resource allocation. The base station continuously adjusts resource assignments based on the received capability feedback, ensuring that resources are allocated efficiently to match the actual reception capabilities of each UE, thus minimizing resource waste.
3Productivity
If interference cancellation capabilities are utilized, then data throughput improves, but system complexity increases due to capability management
Solution Approach 1:
The patent applies universality by creating a unified resource allocation framework that can handle both UEs with IC capabilities and UEs without IC capabilities through a single base station controller. The base station maintains a universal resource pool and uses a common allocation algorithm that automatically adapts to different UE types based on their reported capabilities, avoiding the need for separate allocation systems and reducing overall complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of capability information that indicates interference cancellation (IC) capability information associated with at least one UE. The UE may receive sidelink control information (SCI) that indicates sidelink resource reservation information in a resource selection window. The UE may transmit an indication of one or more reserved resources for a sidelink communication, the one or more reserved resources being based at least in part on the IC capability information and the sidelink resource reservation information. Numerous other aspects are described.