Mobile Station Discards Inconsistent Uplink Grants to Reduce False Alarms
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Solution Overview
Problem
In LTE communication systems, the probability of False Alarm in Persistent scheduling is high due to inconsistent uplink scheduling grants, leading to interference and degradation of system characteristics, especially when mobile stations transmit data without assigned radio resources.
Innovation Solution
A mobile communication method where the mobile station discards persistent assignment signals if the information on the uplink radio resource and the persistent assignment signal are inconsistent, ensuring transmission only when the information matches the assigned resources, thereby reducing False Alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If persistent scheduling is used to assign uplink radio resources in a predetermined cycle, then transmission efficiency is improved, but the probability of False Alarm increases due to inconsistent scheduling grants
Solution Approach 1:
The mobile station receives persistent assignment signals containing scheduling grant information and compares it with pre-stored consistent scheduling grant information. When inconsistency is detected, the mobile station discards the persistent assignment signal, thereby reducing False Alarm probability while maintaining the efficiency benefits of persistent scheduling
Solution Approach 2:
The patent replaces the traditional mechanical verification process with an information comparison mechanism where the mobile station's information processing unit compares scheduling grant information from persistent assignment signals with stored reference information to detect and prevent False Alarms
2Speed
If the mobile station transmits uplink data without verifying scheduling grant consistency, then transmission speed is maintained, but system characteristics are degraded due to interference
Solution Approach 1:
The mobile station performs preliminary verification of scheduling grant consistency before transmitting uplink data. By comparing the scheduling grant information in the persistent assignment signal with the pre-stored consistent scheduling grant information, the mobile station prevents interference-causing transmissions while maintaining normal transmission speed when consistency is confirmed
3Device complexity
If persistent assignment signals are always accepted, then device complexity is reduced, but information accuracy deteriorates due to inconsistent scheduling grants
Solution Approach 1:
The patent changes the parameter of scheduling grant information verification by introducing a comparison mechanism that checks consistency between persistent assignment signals and pre-stored reference information. This adds minimal processing complexity while significantly improving information accuracy and reducing False Alarms
Data Source
AI summary
In a mobile communication method according to the present invention, a mobile station (UE) transmits uplink data to a radio base station by using an uplink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle. The method includes the steps: (A) notifying, to the mobile station (UE), the predetermined cycle and information on the uplink radio resource; (B) notifying, to the mobile station (UE), the predetermined scheduling information; and (C) transmitting uplink data in the predetermined cycle by using the uplink radio resource assigned by the predetermined scheduling information, the transmission starting at a certain point determined on the basis of the received predetermined scheduling information. In the step (C), the predetermined scheduling information is discarded, when the information on the uplink radio resource and information notified by the predetermined scheduling information are inconsistent with each other.