Multi-Mode Multicarrier Modulation for Wireless Resource Allocation
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Solution Overview
Problem
Current LTE wireless communication networks face inefficiencies in resource allocation, particularly for machine-type communication (MTC) applications due to fixed subframe structures and inability to meet low latency requirements, leading to resource wastage and inadequate support for diverse service needs.
Innovation Solution
Implementing multi-mode multicarrier modulation techniques that allow for flexible subcarrier spacing and symbol durations, enabling simultaneous support of multiple numerologies within the same frequency band, which dynamically allocates resources based on service requirements such as latency and data volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed subframe structures are used in LTE networks, then network simplicity is maintained, but resource utilization efficiency deteriorates for diverse services
Solution Approach 1:
The patent implements dynamic resource allocation by allowing flexible adjustment of subcarrier spacing and symbol durations based on service requirements. Different numerologies (subcarrier spacing values) can be dynamically selected and applied to different time-frequency resources, enabling the network to adapt resource structure to match varying service needs such as low-latency communications versus high-throughput scenarios.
Solution Approach 2:
The patent segments the time-frequency resource grid into multiple numerology regions, where each region can be configured with different subcarrier spacing values. This segmentation allows different parts of the spectrum to be optimized for different service types simultaneously, with each segment independently configured according to its specific requirements.
2Adaptability or versatility
If uniform subcarrier spacing is used across the network, then system simplicity is maintained, but ability to meet diverse service requirements deteriorates
Solution Approach 1:
The patent creates a universal resource allocation framework that supports multiple numerologies within a single network infrastructure. The base station is configured to handle different subcarrier spacing values and can allocate resources with appropriate numerologies based on service type, making the system universally applicable to diverse services ranging from machine-type communications to enhanced mobile broadband.
Solution Approach 2:
The patent changes the subcarrier spacing parameter dynamically based on service requirements. By allowing the network to switch between different subcarrier spacing values (numerologies) for different time-frequency resources, the system can optimize performance for specific services such as low-latency communications using larger subcarrier spacing or high-efficiency data transmission using smaller subcarrier spacing.
3Loss of time
If traditional LTE resource allocation is used, then backward compatibility is maintained, but latency requirements for machine-type communications deteriorate
Solution Approach 1:
The patent applies parameter changes by adjusting subcarrier spacing values to meet specific latency requirements. For machine-type communications requiring low latency, the system can allocate resources with larger subcarrier spacing that enables faster transmission times, directly addressing the latency issue while maintaining efficient resource utilization.
Data Source
AI summary
Techniques are disclosed for allocating time-frequency resources in a system that uses multiple multicarrier modulation numerologies. According to one aspect, a method in a first wireless node comprises allocating (1310) time-frequency resources for use by a second wireless node, where said allocating comprises selecting, for use in multicarrier modulation in the allocated time-frequency resources, one of two or more subcarrier bandwidths that the second wireless node is adapted to use for modulating or demodulating of data. In some embodiments, the method further comprises sending (1320) resource allocation information to the second wireless node, the resource allocation information identifying the allocated time-frequency resources.