Sidelink Resource Pre-emption for Urgent Data Transmission
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Solution Overview
Problem
In sidelink communication, existing technologies face challenges in efficiently pre-empting sidelink resources to ensure timely transmission of urgent data, especially in congested or resource-fragmented scenarios.
Innovation Solution
A method and apparatus for pre-empting sidelink resources, where a first user equipment (UE) determines a reserved resource, transmits a signal indicating the reserved resource, and releases it upon receiving a pre-emption indication from a second UE. The second UE receives the signal indicating the reserved resource and transmits a pre-emption indication to the first UE to pre-empt the resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pre-emption mechanism is implemented to allow urgent data to obtain sidelink resources, then the reliability of urgent data transmission is improved, but the complexity of resource management increases
Solution Approach 1:
The patent applies preliminary action by having UEs reserve sidelink resources in advance and indicate these reservations to neighboring UEs. The reserved resource indication is transmitted before the actual transmission time, allowing potential pre-emption actions to be prepared ahead. This enables urgent data to preempt reserved resources when needed while maintaining systematic resource management through predefined reservation protocols.
Solution Approach 2:
The patent implements feedback mechanisms where UEs transmit reserved resource indications to neighboring UEs, and the receiving UE responds with pre-emption indications if it has urgent data. This feedback loop allows dynamic resource reallocation while maintaining manageable complexity through standardized indication and response procedures, balancing reliability improvement with system complexity control.
2Speed
If reserved resources are made available for potential pre-emption, then the responsiveness to urgent data is improved, but the loss of time for resource allocation increases
Solution Approach 1:
The patent applies preliminary action by pre-reserving sidelink resources and transmitting reservation indications in advance. This allows the system to be ready for immediate pre-emption when urgent data arrives, improving responsiveness. The reserved resources are prepared beforehand with clear indication signals, eliminating the need for time-consuming resource allocation decisions when pre-emption is needed.
Solution Approach 2:
The patent extracts the resource allocation decision from the normal transmission flow by introducing a separate pre-emption indication mechanism. When urgent data needs pre-emption, the system can quickly extract and execute the pre-emption action without disrupting the ongoing resource allocation processes, thereby reducing the time loss associated with reallocation decisions.
3Productivity
If a pre-emption mechanism is implemented in shared pool resources, then the productivity of urgent data transmission is improved, but the device complexity for implementing the mechanism increases
Solution Approach 1:
The patent applies preliminary action by establishing a standardized reservation and pre-emption indication protocol that simplifies the pre-emption mechanism. UEs reserve resources and transmit indications using predefined procedures, which reduces the complexity of implementation while maintaining high productivity for urgent data transmission. The preliminary setup of reservation rules and indication formats makes the mechanism easier to implement compared to ad-hoc pre-emption systems.
Solution Approach 2:
The patent implements a universal pre-emption indication mechanism that can be used by any UE in the sidelink network regardless of specific conditions. This multi-functional approach simplifies device implementation by using a single standardized protocol for all pre-emption scenarios, rather than requiring multiple specialized mechanisms for different transmission conditions, thereby improving productivity without proportionally increasing complexity.
Data Source
AI summary
The subject application is related to method and apparatus for scheduling a sidelink resource. A method performed by a first user equipment (UE), comprising: determining a reserved resource; transmitting a signal indicating the reserved resource; and if a pre-emption indication is received, releasing the reserved resource to a second UE.