Mobile Station Packet Discard Sequence Number Feedback
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Solution Overview
Problem
In LTE mobile communication systems, it is challenging for the radio base station to accurately estimate packet discard in the mobile station's transmission buffer due to excessive delay, as existing methods lack defined processes for monitoring and reporting packet sequence number discontinuity, leading to difficulties in call admission control and resource allocation.
Innovation Solution
The mobile station assigns sequence numbers to packets before discarding them and reports sequence number discontinuities to the radio base station, enabling the station to monitor and estimate packet discard events, thereby facilitating call admission control and resource allocation based on buffer status and delay thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radio base station uses conventional methods to monitor packet transmission status, then the monitoring process is simple, but the accuracy of estimating packet discard due to delay is insufficient
Solution Approach 1:
The mobile station feeds back sequence number information to the radio base station regarding packets discarded due to delay. This feedback mechanism enables the base station to accurately estimate packet discard by detecting sequence number discontinuities, directly improving measurement precision without requiring complex monitoring infrastructure at the base station
Solution Approach 2:
Sequence numbers serve as an intermediary indicator to represent packet discard status. Instead of directly monitoring complex delay and discard events, the system uses sequence number discontinuities as a measurable proxy, simplifying the monitoring process while improving estimation accuracy
2Reliability
If the mobile station transmits real-time service data preferentially, then the delay requirement is satisfied for most users, but the radio resources are exhausted when the number of users increases
Solution Approach 1:
The mobile station monitors its own buffer status and delay conditions, then feeds back sequence number information indicating packet discard to the base station. This enables the base station to detect resource exhaustion conditions and adjust call admission control dynamically, maintaining reliability while managing resource availability
Solution Approach 2:
The system performs preliminary monitoring of delay conditions and packet discard status before complete resource exhaustion occurs. By detecting sequence number discontinuities early, the base station can prevent further resource allocation that would lead to total resource depletion, maintaining service reliability
3Productivity
If the radio base station performs call admission control based on limited information, then the control process is simple, but the effectiveness of resource allocation is insufficient
Solution Approach 1:
The mobile station provides feedback on packet discard status through sequence number reporting. This additional information enables the base station to make more informed call admission control decisions, improving resource allocation effectiveness without requiring complex analysis algorithms
Solution Approach 2:
The system replaces complex direct monitoring of delay and discard events with a simpler information-theoretic approach using sequence number analysis. This substitution improves productivity by enabling effective resource allocation through straightforward sequence number discontinuity detection
Data Source
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AI summary
A mobile station according to the present invention includes: a packet discarder unit (102, 103) configured to discard a packet in an uplink transmission buffer, after assigning a sequence number to the packet, when a predetermined condition is met.