Sidelink DCI Size Alignment Across Bandwidth Parts
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Solution Overview
Problem
Existing sidelink communication protocols in wireless networks face inefficiencies in configuring downlink control information, leading to suboptimal resource allocation and increased latency in data transmission.
Innovation Solution
The proposed solution involves optimizing sidelink downlink control information configuration by aligning DCI sizes across different bandwidth parts (BWPs) and dynamically switching BWPs to ensure efficient resource allocation and reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different DCI size configurations are used for different bandwidth parts, then adaptability to various bandwidth requirements is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies universality by configuring all bandwidth parts with the same DCI size parameters (payload size, number of bits). This allows the DCI format to serve multiple bandwidth parts uniformly, eliminating the need for separate configuration sets for each BWP. The control resource sets across different BWPs use identical DCI size configurations, making the system more universal and reducing complexity while maintaining adaptability through BWP switching rather than DCI reconfiguration.
2Device complexity
If DCI size alignment across bandwidth parts is implemented, then device complexity is reduced, but flexibility in optimizing resource allocation for specific bandwidth parts may be limited
Solution Approach 1:
The patent employs dynamics by enabling flexible switching between bandwidth parts with different characteristics (bandwidth, subcarrier spacing, cyclic prefix length) while maintaining uniform DCI size configuration. This dynamic BWP switching mechanism allows the system to adapt to varying resource allocation needs without changing the DCI structure, achieving both complexity reduction and maintained flexibility through time-domain switching rather than configuration diversity.
3Device complexity
If uniform DCI size configuration is applied across all bandwidth parts, then processing overhead and device complexity are reduced, but optimization for specific bandwidth part requirements becomes difficult
Solution Approach 1:
The patent applies parameter changes by allowing different bandwidth parts to have different physical layer parameters (bandwidth, subcarrier spacing, cyclic prefix type) while maintaining consistent DCI size parameters. This enables the system to optimize resource allocation for specific BWP requirements through parameter variation in the BWP configuration itself, not through DCI reconfiguration, thereby reducing processing overhead while preserving optimization capabilities.
Data Source
AI summary
A wireless device receives one or more messages indicating reference downlink control information (DCI) formats, wherein each of the reference DCI formats is for a respective of one of downlink bandwidth parts (BWPs) of a scheduling cell. The wireless device receives, via a first downlink BWP of the downlink BWPs, a sidelink DCI including one or more fields and a quantity of predefined values. The quantity is based on a size of a reference DCI format, of the reference DCI formats, corresponding to the first downlink BWP.