Resource Pattern Exchange for MTC and Human Traffic Coexistence
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling machine-type-communication (MTC) devices that support reduced bandwidth and enhanced coverage within LTE systems without affecting normal 3GPP LTE users, particularly in allocating resources for MTC traffic within the LTE spectrum.
Innovation Solution
The solution involves determining a pattern of radio resources based on radio quality and traffic distribution between MTC devices operating in enhanced-coverage mode and those in normal mode, and sharing these patterns between network nodes to minimize inter-cell interference and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If MTC devices support reduced bandwidth (1.4 MHz) to reduce cost and energy consumption, then device cost and energy consumption decrease, but resource allocation complexity increases due to need for separate scheduling patterns
Solution Approach 1:
The patent segments radio resources into different patterns: first patterns for MTC devices in enhanced-coverage mode and second patterns for MTC devices in normal-coverage mode and/or normal UEs. This segmentation allows reduced bandwidth allocation (1.4 MHz) for energy-constrained MTC devices while maintaining separate scheduling structures to manage the complexity of supporting multiple device types with different requirements.
Solution Approach 2:
The patent implements dynamic switching between different resource allocation patterns. Network nodes can switch from first patterns to second patterns based on MTC device capabilities and coverage requirements, enabling flexible resource allocation that adapts to different MTC device types without requiring static complex scheduling for all devices.
2Reliability
If coverage enhancement techniques are applied to MTC devices in remote locations, then coverage is improved, but resource allocation complexity and inter-cell interference increase
Solution Approach 1:
The patent segments MTC devices into those requiring enhanced-coverage mode (for remote locations with high path loss) and those in normal-coverage mode. Separate first patterns are allocated for enhanced-coverage devices using coverage enhancement techniques like repetition and advanced receiver processing, while second patterns serve normal-coverage devices, thereby managing resource allocation complexity through structured separation.
Solution Approach 2:
Different resource patterns with different qualities are allocated to different device types: first patterns optimized for enhanced coverage with higher redundancy and repetition for remote devices, and second patterns for normal coverage devices. This local quality differentiation allows coverage enhancement where needed without unnecessarily complicating resource allocation for all devices.
3Productivity
If MTC traffic is mixed with human-centric traffic in LTE spectrum, then spectrum utilization improves, but inter-cell interference increases
Solution Approach 1:
The patent segments resource allocation into first patterns for MTC devices and second patterns for normal UEs, allowing mixed traffic in the same LTE spectrum while reducing inter-cell interference through coordinated pattern usage. Network nodes exchange information about their assigned patterns to avoid simultaneous transmission conflicts that would cause interference.
Solution Approach 2:
The patent implements feedback mechanisms where network nodes exchange information about their resource pattern assignments with neighboring nodes. This feedback enables coordinated resource allocation that maintains high spectrum utilization for mixed MTC and human-centric traffic while minimizing inter-cell interference through awareness of neighboring allocations.
Data Source
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AI summary
Techniques are disclosed for creating and using a pattern of radio resources to be shared in a cell between devices using an enhanced-coverage mode and at least one other category of devices. An example method includes forming (810) a resource pattern, the resource pattern indicating an allocation of first radio resources in a first cell to a first type of wireless device and indicating an allocation of second radio resources in the first cell to a second type of wireless device. The resource pattern is sent (820) to a second network node of the wireless communication system, e.g., a network node serving a neighboring cell, or to at least one wireless device, or to both. The resource pattern may be used in scheduling by the first network node or the second network node, or both.