Sidelink Data Transmission with Timer-Based Resource Selection
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Solution Overview
Problem
In sidelink communication, the delay in data transmission and the quality of service are compromised due to the terminal's inability to promptly obtain transmission resources from the network side, especially when reporting both Uu and sidelink buffer status reports simultaneously.
Innovation Solution
A method where a terminal starts a target timer for a sidelink logical channel and determines a target resource based on whether resource configuration information from the base station is received before the timer expires, allowing for timely data transmission on the sidelink logical channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal reports sidelink BSR to the network side for dynamic resource scheduling, then the transmission resource can be allocated by the network side, but the terminal cannot promptly obtain transmission resources due to reporting delays
Solution Approach 1:
The terminal starts a target timer when data arrives at the buffer for the target sidelink logical channel, proactively preparing for resource acquisition. This preliminary action allows the terminal to immediately determine and use previously configured resources when the timer expires before receiving new resource configuration, eliminating waiting time and achieving prompt resource acquisition while maintaining network-controlled allocation reliability
Solution Approach 2:
The terminal autonomously determines the target resource based on whether resource configuration information is received before the target timer expires. When the configuration is not received in time, the terminal self-services by selecting from pre-configured resources without further network interaction, thus resolving the contradiction between maintaining reliable network-controlled allocation and achieving prompt resource acquisition
2Reliability
If the terminal waits for resource configuration information from the base station, then resource allocation is controlled by the network side, but data transmission delay increases
Solution Approach 1:
The base station pre-configures resources for the terminal in advance, and the terminal starts a target timer when data arrives. This preliminary configuration allows the terminal to immediately use pre-approved resources when the timer expires before receiving updated configuration, maintaining network control while enabling fast data transmission without waiting for network responses
Solution Approach 2:
The system dynamically adapts resource acquisition mode based on timing: the terminal first attempts to obtain resources from the network side (maintaining network control), but when the target timer expires before receiving configuration, it dynamically switches to using pre-configured resources (prioritizing transmission speed), thus resolving the contradiction between network control and transmission efficiency
Data Source
AI summary
A method for data transmission. The method includes: starting, by a terminal, a target timer corresponding to a target sidelink logical channel, determining a target resource based on whether resource configuration information transmitted by a base station is received before the target timer expires, wherein the resource configuration information is resource information of a first resource configured by the base station for the terminal, and the first resource is a resource configured to transmit target data to be transmitted on the target sidelink logical channel; and transmitting the target data on the target sidelink logical channel through the target resource.