Terminal SR Failover Across BWP Resources After Transmission Failure
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Solution Overview
Problem
Terminals in communication systems face large latency in requesting uplink resources due to failed scheduling requests (SRs) that cannot be transmitted according to configured resources, leading to resource wastage and inefficient resource allocation.
Innovation Solution
The method involves switching to a second resource, such as a target serving cell, bandwidth part (BWP), or SR configuration, when an SR fails to be transmitted at a first resource, and transmitting the SR at the second resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal transmits SR according to the original SR configuration in the original BWP, then the resource allocation follows the configured pattern, but the latency becomes large when SR transmission fails
Solution Approach 1:
The patent makes the SR transmission configuration dynamic by allowing the terminal to switch between original BWP and target BWP based on SR transmission success. When SR transmission fails in the original BWP, the terminal dynamically switches to a target BWP for alternative SR transmission, thereby adapting to changing transmission conditions and reducing latency.
Solution Approach 2:
The patent changes the BWP parameter from fixed to variable. The network configures multiple BWPs including an original BWP and target BWPs, and the terminal switches between these BWPs based on SR transmission outcomes. This parameter change enables flexible resource allocation and reduces transmission latency when failures occur.
2Productivity
If the terminal waits for SR transmission opportunity in the original BWP, then the original SR configuration is maintained, but resource allocation efficiency decreases due to prolonged waiting
Solution Approach 1:
The network pre-configures target BWPs and SR resources before the terminal needs them. When SR transmission fails in the original BWP, the terminal can immediately use the pre-configured target BWP resources without waiting for reconfiguration, thereby reducing latency and improving resource allocation efficiency.
Solution Approach 2:
The target BWP acts as an intermediary resource when the original BWP fails to transmit SR successfully. The terminal uses the target BWP as an alternative path to transmit SR to the network, bypassing the failure in the original BWP and maintaining efficient resource allocation.
3Adaptability or versatility
If multiple SR configurations are maintained for different BWPs, then transmission options increase, but the system complexity increases
Solution Approach 1:
The patent segments SR transmission resources across different BWPs, with each BWP having its own SR configuration. The terminal segments the SR transmission process into attempts in the original BWP first, then switches to target BWP if needed. This segmentation provides multiple transmission options while managing complexity through structured organization.
Solution Approach 2:
The target BWP configuration serves multiple functions: it acts as an alternative transmission path for SR, provides backup resources when original BWP fails, and enables flexible switching. This multi-functionality increases adaptability while avoiding the need for completely separate configuration management systems.
Data Source
AI summary
This disclosure provides a scheduling request (SR) transmitting method and a terminal. The method includes: switching to a second resource in a case that an SR fails to be transmitted at a first resource; and transmitting the SR at the second resource.