Base Station Buffer Estimation for Wireless Scheduling
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Solution Overview
Problem
Current buffer status reporting in LTE wireless communication systems is prone to outdated information, leading to inaccurate scheduling decisions, which can result in inefficient radio resource management and increased delay for delay-sensitive services like VoIP, due to limited granularity and frequency of reports.
Innovation Solution
A method and arrangement in a base station that estimates the amount of data to be received from a terminal by determining the requested service and estimating the arrival time and frame size, allowing for proactive buffer estimation and reduced signaling, thereby improving scheduling accuracy and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If regular Buffer Status Reports are transmitted with limited granularity and frequency, then signaling overhead is reduced, but the accuracy of buffer status information becomes outdated
Solution Approach 1:
The base station performs preliminary actions by estimating the arrival time of data packets based on service characteristics before the terminal actually transmits buffer status reports. This allows the scheduler to proactively anticipate buffer status changes and make more accurate scheduling decisions without waiting for periodic reports, thereby improving information accuracy without increasing signaling frequency.
2Measurement precision
If Buffer Status Reports are transmitted frequently with high granularity, then scheduling accuracy is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The system implements a feedback mechanism where the base station uses service characteristic information (such as packet arrival patterns for VoIP) to continuously refine its buffer status estimates. The scheduler receives feedback about actual packet arrivals and adjusts its estimation model accordingly, maintaining high scheduling accuracy while avoiding the need for frequent detailed buffer status reports from the terminal.
Solution Approach 2:
The base station performs self-service by autonomously estimating buffer status based on service characteristics without requiring the terminal to continuously report detailed buffer information. The scheduler uses its own knowledge of service patterns (e.g., periodic VoIP packets every 20ms) to predict when data will arrive and how much buffer space will be occupied, eliminating the need for frequent terminal-side reporting.
3Productivity
If scheduling decisions are made with outdated buffer status information, then system operation is simplified, but packet delay increases for delay-sensitive services
Solution Approach 1:
The scheduler performs preliminary actions by estimating packet arrival times before actual arrivals occur. For delay-sensitive services like VoIP with known periodic patterns, the base station proactively reserves resources in advance based on predicted arrivals, ensuring packets can be transmitted immediately upon arrival without waiting for buffer status reports or making scheduling decisions with outdated information.
4Measurement precision
If the base station requests detailed buffer status information from the terminal, then scheduling decisions become more accurate, but the terminal's processing burden and signaling overhead increase
Solution Approach 1:
The base station performs self-service by independently estimating buffer status using its knowledge of service characteristics rather than requiring the terminal to measure and report detailed buffer information. The terminal only needs to provide minimal service type identification, while the base station autonomously performs the complex task of predicting buffer status based on service patterns, significantly reducing terminal processing burden.
Data Source
AI summary
Method and arrangement in base station (110) for estimating the amount of data to be received from a terminal (120). The base station (110) and the terminal (120) are comprised within a wireless communication system (110). The terminal (120) comprises a buffer arranged to buffer frames comprising data. The method comprises determining (401) a service requested by the terminal (120), estimating (403) the arrival time of data to be received from the terminal (120), based on the determined service, and setting (404) a buffer estimate, comprising an estimation of the amount of data to be received, based on an estimated frame size for the determined service.