Scheduling Request Transmission Cycle Priority Control
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Solution Overview
Problem
In mobile communication systems, especially in LTE, unnecessary retransmissions of scheduling requests (SR/BSRs) occur when radio resources are loaded, leading to inefficient resource consumption and power waste, as terminals retransmit requests despite successful reception by the radio resource controlling node.
Innovation Solution
Implementing a method where the terminal sets scheduling request transmission cycles based on priorities, comparing the highest priority of the SR/BSR with a lowest permissible priority notified by the radio resource controlling node, and only retransmitting if the highest priority is equal to or higher than the lowest permissible priority, thereby optimizing SR/BSR transmission and reducing unnecessary retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal continuously retransmits scheduling requests when radio resources are loaded, then the scheduling request is ensured to be transmitted, but unnecessary retransmissions occur leading to inefficient resource consumption and power waste
Solution Approach 1:
The terminal receives feedback information from the radio resource controlling node indicating whether radio resources are available. Based on this feedback, the terminal determines whether to retransmit the scheduling request, avoiding unnecessary retransmissions when resources are loaded while ensuring transmission when resources are available, thus reducing power consumption while maintaining reliability
Solution Approach 2:
The terminal dynamically adjusts its scheduling request transmission behavior based on real-time radio resource availability status. When resources are available, the terminal transmits the request; when resources are loaded, the terminal waits for feedback and only retransmits if necessary, making the transmission process adaptive to system conditions
2Productivity
If the terminal retransmits scheduling requests without checking radio resource availability, then the scheduling request is transmitted frequently, but radio resources are consumed inefficiently
Solution Approach 1:
The terminal uses feedback information from the radio resource controlling node about radio resource availability to make intelligent transmission decisions. This feedback mechanism allows the terminal to transmit scheduling requests only when necessary, improving transmission efficiency while conserving radio resources from unnecessary retransmissions
Solution Approach 2:
The terminal performs preliminary checking of radio resource availability status before transmitting scheduling requests. By anticipating whether resources will be available based on feedback information, the terminal avoids initiating transmissions that would be futile, thereby optimizing the balance between transmission efficiency and resource conservation
Data Source
AI summary
A method and apparatus are provided for transmitting an uplink scheduling request in a mobile communication system. Scheduling request transmission cycles are set according to priorities between a terminal and a radio resource controlling node. The terminal transmits the scheduling request to the radio resource controlling node according to a scheduling request transmission cycle corresponding to a highest priority among priorities corresponding to uplink data or uplink control signals, if the uplink data or the uplink control signals are generated from an upper layer. The terminal receives scheduling information from the radio resource controlling node, and determines whether resource allocation information is included in the scheduling information. The terminal cyclically transmits the scheduling request to the radio resource controlling node in the scheduling request transmission cycle, if the resource allocation information is not included in the scheduling information.