Sidelink Resource Allocation Across DRX Active-Time Constraints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating resources for sidelink communication, particularly when user equipment (UE) operates in discontinuous reception (DRX) mode, leading to potential interruptions in data reception due to time intervals exceeding the allowed resource reservation intervals.
Innovation Solution
A method and apparatus for resource allocation in a wireless communication system, where a first UE identifies resources for data transmission to a second UE, excluding reservation information for resources beyond the allowed time interval, and allocates resources within the active time of the second UE's DRX cycle, ensuring uninterrupted scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resources are allocated beyond the allowed time interval for resource reservation, then resource utilization flexibility is improved, but data reception reliability deteriorates due to interruptions in DRX mode
Solution Approach 1:
The transmitting UE performs preliminary identification of the second resource and determines whether to include reservation information based on the time interval condition before actual transmission. This advance preparation ensures that resource reservations only occur when they can be reliably received within the DRX active time, preventing reception interruptions while maintaining allocation flexibility.
Solution Approach 2:
The patent dynamically adjusts resource reservation behavior based on the time interval between first and second resources. When the interval exceeds the allowed threshold, reservation information is excluded from control information; when within threshold, reservation information is included. This dynamic adaptation resolves the contradiction between flexibility and reliability.
2Reliability
If resource reservation information is included in control information, then future resource allocation is ensured, but transmission overhead increases
Solution Approach 1:
The patent extracts reservation information from control information only when necessary - specifically when the time interval between resources exceeds the allowed threshold. In such cases, reservation information is omitted to reduce overhead. When the interval is within threshold, reservation information is retained to ensure reliable future resource allocation. This selective extraction resolves the overhead versus reliability trade-off.
3Productivity
If the time interval between resources exceeds the allowed resource reservation interval, then resource scheduling flexibility is improved, but resource allocation reliability deteriorates
Solution Approach 1:
The patent changes the parameter of reservation information inclusion/exclusion based on the time interval parameter. When the time interval exceeds the allowed threshold, the reservation information parameter is set to excluded; when within threshold, it is set to included. This parameter-based conditional logic maintains scheduling flexibility while ensuring allocation reliability through adaptive parameter adjustment.
Data Source
AI summary
A first UE of the present disclosure identifies a first resource for first data and a second resource for second data, transmits, to a second UE, the first data on the basis of control information for allocating the first resource and the first resource, the control information not including reservation information about the second resource notifying of the location of the second resource on the basis of the time interval between the first resource and the second resource being larger than the time interval permitted for the resource reservation, identifies a third resource for the second data in the activation section of a DRX cycle of the second UE, and transmits, to the second UE, the second data on the basis of control information for allocating the third resource and the third resource.