Sidelink Resource Scheduling via UE Feedback and Broadcasting
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Solution Overview
Problem
Existing wireless communication systems face challenges with interference, high signaling overhead, and inefficient resource allocation in sidelink communications between user equipment (UEs).
Innovation Solution
The method involves communicating messages for establishing sidelink communication connections, transmitting data transmission indications, receiving resource allocation indications, and broadcasting resource allocations to UEs, thereby enabling efficient inter-UE scheduling and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UEs operate in an autonomous sidelink communications system without network entity aid, then device complexity is reduced and ease of operation is improved, but interference from other UEs increases and reliability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the first UE broadcasts resource allocation information to second UEs, which then feed back their reception status and interference measurements. This feedback loop enables the system to dynamically adjust resource allocations and mitigate interference while maintaining autonomous operation, directly addressing the contradiction between ease of operation and interference reduction.
Solution Approach 2:
The system performs preliminary resource allocation and reservation before actual data transmission. The first UE allocates resources in advance and notifies second UEs, allowing them to prepare for reception and avoid simultaneous transmissions that would cause interference. This preliminary coordination enables autonomous operation while reducing harmful interference.
2Ease of operation
If UEs perform comprehensive sensing and resource selection autonomously, then ease of operation is improved, but signaling overhead increases and device complexity worsens
Solution Approach 1:
The patent merges the resource allocation function into the existing sidelink control information structure. Instead of requiring separate comprehensive sensing procedures, the system combines resource selection and allocation into a single integrated message exchange between UEs, reducing the complexity of autonomous operation while maintaining ease of use.
Solution Approach 2:
The resource allocation indication message serves multiple functions simultaneously: it announces the first UE's resource needs, provides interference information to second UEs, and enables coordinated resource selection. This multi-functionality reduces the need for separate signaling procedures, thereby reducing overall device complexity while maintaining autonomous operation.
3Productivity
If UEs allocate resources without coordinated scheduling, then productivity is improved through faster autonomous transmission, but interference increases and reliability deteriorates
Solution Approach 1:
The system implements feedback mechanisms where second UEs report their reception status and interference measurements to the first UE. This feedback enables the first UE to adjust resource allocations dynamically, ensuring reliable communication while maintaining high productivity through autonomous transmission. The feedback loop allows the system to optimize the trade-off between transmission speed and reliability.
Solution Approach 2:
The resource allocation system is dynamic rather than static. The first UE continuously monitors channel conditions, interference levels, and transmission success rates, and adjusts resource allocations in real-time. This dynamic adaptation enables the system to maintain high productivity while improving reliability by responding to changing network conditions.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A first user equipment (UE) may communicate one or more messages associated with establishing a sidelink communication connection with a set of UEs, including a second UE. The first UE may transmit a message indicating that the first UE has a data transmission to send. The second UE may receive the message and transmit an indication that a first set of resources is allocated to the first UE for the data transmission. In some examples, the second UE may broadcast the indication that the first set of resources is allocated to the first UE. The first UE may transmit the data transmission over the resources based on receiving the indication that the first set of resources is allocated to the first UE. In some examples, the first UE may perform a listen before talk procedure prior to transmitting the data transmission.