LTE Base Station Wireless Resource Scheduling for MTC Devices

Solution Overview

Problem

The rapid increase in the number of Machine Type Communication (MTC) devices in LTE networks leads to congestion in the random access channel, resulting in high collision probability and time delays due to conventional contention-based resource request mechanisms.

Innovation Solution

An LTE base station with a transceiver and processor that schedules wireless resources in advance by receiving transmission periods, tolerable time shifts, and required resource amounts from MTC devices, allocating resources based on these parameters to avoid contention-based random access procedures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If contention-based random access procedure is used for resource allocation, then MTC devices can request resources dynamically, but the random access channel becomes congested with high collision probability and time delays

Engineering Contradiction:

Improvedynamic resource allocationVSAvoidresource allocation time delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The base station performs preliminary resource allocation by determining scheduling intervals and allocating resources to MTC devices before they need to transmit data. This eliminates the need for contention-based random access procedures, as devices receive pre-assigned resources that they can use immediately, thereby reducing time delays and avoiding channel congestion.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention extracts MTC devices from the contention-based random access procedure and creates a separate scheduling mechanism. By removing these devices from the general random access channel, the system eliminates collisions and delays associated with contention-based access while maintaining dynamic resource allocation capabilities through dedicated scheduling.

Inventive Principle:

Principle #2Taking out (Extraction)

2Quantity of substance

If many MTC devices are served by a single LTE base station, then network coverage is extended, but the random access channel instructions per second increase significantly

Engineering Contradiction:

Improvenumber of MTC devices servedVSAvoidrandom access channel instruction rate

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The base station performs preliminary resource allocation by determining scheduling intervals and allocating resources to MTC devices before they need to transmit data. This eliminates the need for contention-based random access procedures, as devices receive pre-assigned resources that they can use immediately, thereby reducing time delays and avoiding channel congestion.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention extracts MTC devices from the contention-based random access procedure and creates a separate scheduling mechanism. By removing these devices from the general random access channel, the system eliminates collisions and delays associated with contention-based access while maintaining dynamic resource allocation capabilities through dedicated scheduling.

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If conventional LTE resource allocation is used for MTC devices, then standard compliance is maintained, but resource allocation efficiency decreases due to frequent scheduling intervals

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidresource allocation efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system dynamically determines scheduling intervals based on individual device characteristics and traffic patterns. By making the scheduling interval configurable and adaptive rather than fixed, the system can optimize resource allocation efficiency while maintaining the flexibility to accommodate different MTC application requirements and standard compliance.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the scheduling interval parameter from a fixed value to a configurable parameter that can be adjusted based on device requirements and network conditions. This allows the system to optimize resource allocation efficiency by using longer intervals where appropriate while maintaining standard compliance and scheduling flexibility for different MTC scenarios.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9480080B2Long term evolution base station and wireless resource scheduling method thereof

Publication Date: 2016.10.25 INSTITUTE FOR INFORMATION INDUSTRY

AI summary

An LTE base station and a wireless resource scheduling method thereof are provided. The LTE base station receives a transmission period, a tolerable time shift, a start transmission time instant, and a required resource amount from each of a plurality of machine type communication apparatuses. The LTE base station decides a scheduling interval length according to the transmission periods, decides a first scheduling interval according to a start scheduling time instant and the scheduling interval length, and decides a first resource allocation result of the first scheduling interval for the machine type communication apparatuses according to the transmission periods, the tolerable time shifts, the start transmission time instants, and the required resource amounts. The LTE base station further decides a second resource allocation result for the first scheduling interval or a second scheduling interval for the machine type communication apparatuses according to the first resource allocation result.