UE Scheduling Request Logic Prevents Unnecessary Uplink Transmissions
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Solution Overview
Problem
In LTE mobile communication systems, UEs face difficulties in efficiently allocating wireless resources for uplink transmission due to the lack of current buffer status information at the scheduler in the eNB, leading to unnecessary scheduling requests, power waste, and increased uplink interference.
Innovation Solution
A method and apparatus for a UE to check if a Buffer Status Report (BSR) is canceled before triggering a Scheduling Request (SR), ensuring that resources are requested only when the BSR is not canceled, thereby preventing unnecessary SR transmissions and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE triggers a Scheduling Request (SR) whenever a Buffer Status Report (BSR) is generated, then the eNB can allocate uplink resources for BSR transmission, but unnecessary SR transmissions occur when the BSR is canceled, causing power waste and uplink interference
Solution Approach 1:
The patent applies preliminary action by checking whether the BSR is canceled before triggering the SR. The UE performs this check in advance (at step 1105 before step 1110 in the flowchart) to prevent unnecessary SR transmissions. This preliminary verification ensures that SR is only triggered when the BSR actually needs to be transmitted, thereby avoiding wasted power and reducing uplink interference while maintaining reliable resource allocation.
2Reliability
If a UE triggers a Scheduling Request (SR) whenever a Buffer Status Report (BSR) is generated, then the eNB can allocate uplink resources for BSR transmission, but unnecessary SR transmissions occur when the BSR is canceled, causing increased uplink interference
Solution Approach 1:
The patent applies preliminary action by checking whether the BSR is canceled before triggering the SR. The UE performs this check in advance (at step 1105 before step 1110 in the flowchart) to prevent unnecessary SR transmissions. This preliminary verification ensures that SR is only triggered when the BSR actually needs to be transmitted, thereby avoiding wasted power and reducing uplink interference while maintaining reliable resource allocation.
3Loss of energy
If the UE checks whether the BSR is canceled before triggering the SR, then unnecessary SR transmissions are prevented, but the device complexity increases due to additional checking logic
Solution Approach 1:
The patent applies self-service by having the UE autonomously check its own BSR cancellation status before triggering an SR. The UE maintains internal state information about whether a BSR is canceled (as indicated by the flowchart step 1105 check), and uses this self-knowledge to make the decision whether to trigger an SR. This self-service approach avoids the need for complex external coordination or additional signaling, keeping the complexity increase minimal while effectively preventing unnecessary SR transmissions.
Data Source
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AI summary
A method and an apparatus for receiving a scheduling request in a mobile communication system. The method comprises the steps of: transmitting information related to Scheduling Request (SR) transmission resources to a User Equipment (UE); and receiving an SR from the UE, wherein the SR is received, in at least the case that the at least one BSR is triggered and not cancelled at the UE.