Sidelink Resource Reservation Limiting for Collision Reduction
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Solution Overview
Problem
Current wireless communication technologies, such as 5G NR and LTE, face challenges in efficiently managing resource reservations for sidelink communications, leading to issues like over-reservation of resources and persistent collisions, which affect spectral efficiency and reliability.
Innovation Solution
Implementing techniques for resource reservation in sidelink communications that include limiting the number of resources periodically reserved, releasing reserved resources when necessary, and staggering resource reservations across future periods, allowing UEs to autonomously select and reserve resources based on periodic indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resources are periodically reserved for future transmissions, then transmission reliability is improved, but resource waste increases due to over-reservation
Solution Approach 1:
The patent applies dynamics by making the resource reservation flexible rather than fixed. The receiver can dynamically adjust the number of resources reserved by providing feedback on actual transmission needs, allowing the system to adapt between conservative reservation (high reliability) and efficient reservation (low waste) based on actual conditions.
Solution Approach 2:
The patent changes the parameter of resource reservation quantity based on feedback. The receiver indicates whether the reserved resources are sufficient, and the transmitter adjusts the reservation quantity accordingly, transforming a static reservation system into one that dynamically adapts to actual needs.
2Reliability
If resources are reserved for retransmission, then transmission reliability is improved, but spectral efficiency deteriorates due to persistent collisions
Solution Approach 1:
The patent introduces feedback from the receiver to the transmitter about resource reservation adequacy. This feedback mechanism allows the system to learn from previous reservations and adjust future reservations to avoid persistent collisions, thereby improving spectral efficiency while maintaining reliability.
Solution Approach 2:
The system performs preliminary resource reservation based on historical patterns, but then adjusts this preliminary action based on actual transmission outcomes and receiver feedback, preventing wasteful reservations that would cause persistent collisions.
3Reliability
If multiple resources are reserved periodically, then transmission reliability is improved, but device complexity increases due to resource management overhead
Solution Approach 1:
The patent applies partial action by reserving only the necessary number of resources rather than always reserving maximum resources. The receiver's feedback on whether reserved resources are sufficient enables the system to use minimal adequate resources, reducing management complexity while maintaining reliability.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for enhanced resource reservation for sidelink communication. A method that may be performed by a transmitter user equipment (UE) includes transmitting a transport block (TB) in a first slot of a current reservation period, wherein the transmission of the TB reserves a future resource in the current reservation period for retransmission of the TB, indicating, when transmitting the TB, a period to periodically reserve one or more resources, in one or more future reservation periods, for transmissions of one or more other TBs, and taking action to limit or release a number of the one or more resources periodically reserved in the one or more future reservation periods for the transmissions of the one or more other TBs.