Base Station Predictive Scheduling With SR Inhibition
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Solution Overview
Problem
Semi-persistent scheduling (SPS) is not optimal for all users, leading to inefficient resource use and excessive overhead, while predictive scheduling can result in sub-optimal battery use due to prolonged receiver activation during scheduling delays, especially in scenarios like dynamic VoIP scheduling during talk spurts.
Innovation Solution
Inhibiting scheduling requests (SR) by simulating SPS, even when predictive scheduling is used, by sending a new grant to trigger each transmission, allowing the base station to control resource allocation more dynamically and reducing unnecessary receiver activation through the use of SR inhibiting indicators and SPS grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If semi-persistent scheduling (SPS) is used for predictable services, then resource allocation is simplified and periodic transmissions are supported, but resource efficiency deteriorates due to regular scheduling request grants being sent even when unnecessary
Solution Approach 1:
The patent applies dynamics by making the scheduling request inhibition dynamic rather than static. The base station dynamically controls SR inhibition based on current scheduling state and data arrival predictions, allowing the system to adapt between SPS-like behavior and dynamic scheduling based on actual needs, thereby avoiding resource wastage while maintaining operational simplicity
2Loss of time
If predictive scheduling is used to reduce scheduling delay, then response time is improved by transmitting grants without waiting for SR, but battery consumption deteriorates due to prolonged receiver activation during scheduling delays
Solution Approach 1:
The patent applies preliminary anti-action by preemptively inhibiting scheduling requests before they can be transmitted. The base station sends SR inhibition indicators to prevent terminals from sending SRs during periods when predictive scheduling will handle data arrivals, thereby avoiding the energy-consuming cycle of SR transmission and prolonged receiver activation while maintaining low latency
3Loss of energy
If scheduling requests are inhibited to reduce overhead, then resource efficiency is improved, but scheduling flexibility deteriorates due to reduced terminal-initiated scheduling opportunities
Solution Approach 1:
The patent applies feedback by continuously monitoring data arrival patterns and scheduling state at the base station. Based on this feedback, the base station dynamically adjusts SR inhibition decisions, releasing inhibition when data arrivals indicate need for flexible scheduling while maintaining inhibition during predictable periodic transmissions, thereby balancing overhead reduction with scheduling flexibility
Data Source
AI summary
The present invention relates to a method of a base station, the method comprising: obtaining information about a service currently used by a communication terminal associated with the base station; performing predictive scheduling of transmissions from the communication terminal to the base station based on the obtained information, the predictive scheduling including determining an interval I which is the predicted maximal time period between consecutive transmission grants sent by the base station to the communication terminal; sending a first transmission grant to the communication terminal at the time t=0 in accordance with the predictive scheduling; sending a first SR inhibiting indicator to the communication terminal, preventing the communication terminal from sending a Scheduling Request (SR) to the base station unless a specified criterion is fulfilled; and sending a second transmission grant to the communication terminal at the latest at the time t=I. The invention also relates to the base station.