SRS Bandwidth Allocation Based on Terminal Power and Mobility
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Solution Overview
Problem
Existing radio communication systems, such as those using the OFDMA standard, fail to appropriately allocate radio resources for SRS transmission to mobile terminals, especially in dynamic environments, leading to inefficient resource utilization and increased operator load.
Innovation Solution
A reference signal transmission scheduling device and method that calculates the maximum and minimum SRS bandwidth based on mobile terminal power and mobility, respectively, and allocates resources within this range to optimize SRS transmission, minimizing resource residue and automatically adjusting transmission intervals based on mobility thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed radio resources are allocated to mobile terminals for SRS transmission, then resource allocation is simple, but resource utilization efficiency deteriorates and operator load increases
Solution Approach 1:
The patent implements dynamic resource allocation for SRS transmission by determining bandwidth based on mobile terminal power capabilities and mobility states. The allocation changes adaptively according to terminal conditions rather than being fixed, resolving the contradiction between simple allocation and efficient utilization.
Solution Approach 2:
The system changes allocation parameters (bandwidth and transmission interval) based on terminal power and mobility parameters. By dynamically adjusting these parameters according to terminal states, the system achieves both efficient resource utilization and manageable complexity through rule-based adaptation.
2Measurement precision
If SRS bandwidth is increased to improve frequency characteristic measurement, then measurement precision improves, but resource consumption increases
Solution Approach 1:
The patent dynamically adjusts SRS bandwidth as a parameter based on terminal power capabilities and mobility states. High mobility terminals receive smaller bandwidth allocations since their frequency characteristics change rapidly, while low mobility terminals receive larger allocations for precise measurement, optimizing the balance between measurement precision and resource consumption.
Solution Approach 2:
The system applies partial action by allocating SRS bandwidth selectively based on terminal needs. Not all terminals require maximum bandwidth for SRS transmission - the system provides just enough bandwidth for each terminal's specific requirements, avoiding excessive resource consumption while maintaining necessary measurement precision.
3Adaptability or versatility
If SRS transmission interval is decreased to track environmental variation, then adaptability improves, but resource consumption increases
Solution Approach 1:
The patent dynamically adjusts the SRS transmission interval based on terminal mobility state. High mobility terminals have shorter intervals to track rapid environmental changes, while low mobility terminals have longer intervals reducing resource consumption. This parameter adaptation resolves the contradiction between adaptability and resource usage.
Solution Approach 2:
The system implements dynamic transmission intervals that adapt to terminal mobility conditions. Rather than using a fixed interval for all terminals, the system adjusts intervals dynamically based on how quickly terminal environments change, achieving both adaptability and resource efficiency.
4Area of stationary object
If maximum SRS bandwidth is allocated to all terminals, then measurement coverage is maximized, but resource waste increases
Solution Approach 1:
The patent applies local quality by allocating different SRS bandwidths to different terminals based on their specific power capabilities and mobility states. Rather than uniformly allocating maximum bandwidth to all terminals, each terminal receives bandwidth appropriate to its local conditions, maximizing coverage where needed while minimizing waste elsewhere.
Solution Approach 2:
The system changes the bandwidth parameter selectively for different terminals based on their individual characteristics. Power-capable terminals with low mobility receive larger bandwidth allocations for wide coverage, while power-constrained or high-mobility terminals receive smaller allocations, eliminating resource waste while maintaining necessary coverage.
Data Source
AI summary
A reference signal transmission scheduling device, which performs scheduling on uplink transmission of a reference signal (SRS) from a mobile terminal to a base station in a wireless communication system, is designed to appropriately allocate an SRS transmission resource to the mobile terminal in consideration of the current circumstances of the mobile terminal. Herein, the maximum value of an SRS bandwidth is calculated based on the maximum transmission-enabled power of the mobile terminal, while the minimum value of the SRS bandwidth is calculated based on the mobility of the mobile terminal. Additionally, the SRS bandwidth, which is actually used by the mobile terminal subjected to SRS transmission resource allocation, is determined within the range between the maximum value and the minimum value of the SRS bandwidth.