Terminal Station Bandwidth Allocation for Uplink Latency
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Solution Overview
Problem
In mobile radio communication services, particularly in LTE systems, the conventional terminal station devices face challenges in improving the utilization efficiency of frequency bands when a lower-level device is connected to multiple user devices in one-to-multiple correspondence, leading to increased latency in uplink communication.
Innovation Solution
The terminal station device employs an information extraction unit, demand amount determination unit, and bandwidth allocation unit to calculate and allocate bandwidth efficiently by extracting uplink communication scheduling information, determining relay network demand, and optimizing transmission start times and amounts for each user device, thereby improving bandwidth utilization and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a lower-level device is connected to multiple user devices in one-to-multiple correspondence, then the communication system can accommodate more users and increase capacity, but the utilization efficiency of the frequency band deteriorates
Solution Approach 1:
The patent segments the bandwidth allocation process into two levels: the terminal station device performs initial bandwidth allocation for multiple user devices connected to different lower-level devices, while each lower-level device performs secondary allocation for its connected user devices. This hierarchical segmentation allows efficient management of multiple users without degrading overall bandwidth utilization efficiency.
2Device complexity
If conventional bandwidth allocation methods are used in one-to-multiple correspondence systems, then device complexity is reduced, but latency in uplink communication increases
Solution Approach 1:
The terminal station device performs preliminary bandwidth allocation and determines the start time and amount of signal information for uplink communication before the actual transmission occurs. By calculating and notifying user devices of their allocated resources in advance, the system reduces waiting time and latency while maintaining manageable device complexity through automated pre-computation.
3Loss of time
If sequential transmission of uplink communication scheduling information is used, then latency is reduced, but the system cannot optimize bandwidth allocation for multiple user devices efficiently
Solution Approach 1:
The patent merges the bandwidth allocation functions of the terminal station device with the lower-level devices. The terminal station device allocates bandwidth for multiple user devices across different lower-level devices simultaneously, while lower-level devices handle local allocation. This combination allows both low latency through coordinated scheduling and high bandwidth utilization efficiency through centralized optimization.
Data Source
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AI summary
Information on allocation of a bandwidth of uplink communication of each user device is extracted from information notified by an upper-level device on the uplink communication of the user devices. Identification information of a lower-level device connected to a terminal device and identification information of the user devices are stored in correlation with each other. A bandwidth demanded for uplink communication of the terminal device is determined on the basis of the information on the allocation of the bandwidth of the uplink communication of each of the user devices and the identification information of the user devices. A start time point of the uplink communication of the terminal device and the amount of information of signals for which transmission of the uplink communication of the terminal device is allowed are allocated to the terminal device on the basis of the bandwidth demanded for the uplink communication of the terminal device.