MCPTT Prioritization via Proximity-Based Resource Allocation
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Solution Overview
Problem
In emergency situations, mission critical push-to-talk (MCPTT) services in LTE networks face challenges with insufficient allocation of radio resources to users, leading to reduced download and upload speeds due to high network traffic, and priority access is often given to first responders regardless of their proximity to the emergency, which may not be effective in all cases.
Innovation Solution
A channel-sensitive MCPTT prioritization method that detects emergencies and prioritizes network access for User Equipments (UEs) based on the distance of first responder devices from the emergency location, ensuring that UEs other than first responders receive priority access if the first responders are not nearby, using unique Logical Channel ID values and priority metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If priority access is given to first responders in MCPTT networks during emergencies, then first responders can access network resources, but actual MCPTT users in need suffer from insufficient resource allocation and reduced speeds
Solution Approach 1:
The patent applies local quality by differentiating priority access based on the specific location and proximity of first responders to the emergency scene. Instead of uniform priority allocation, the system assigns different priority levels to different users based on their geographic proximity to the emergency location, ensuring that resources are allocated to those who are actually present and needed at the scene
Solution Approach 2:
The patent implements dynamic priority allocation that changes in real-time based on the situation. The priority metric is dynamically adjusted based on factors such as first responder proximity to the emergency, current network load, and user needs. This dynamic approach allows the system to adapt resource allocation as first responders arrive or leave the scene, optimizing both reliability for responders and productivity for affected users
2Adaptability or versatility
If radio resources are shared among all users during emergencies, then network capacity is distributed, but MCPTT users experience insufficient resource allocation and reduced communication quality
Solution Approach 1:
The patent changes the parameter of resource allocation from equal sharing to priority-based allocation. By introducing a priority metric that considers first responder proximity and user needs, the system transforms the resource distribution model to ensure that MCPTT services receive sufficient resources while still allowing general network sharing for non-critical traffic
3Ease of operation
If standard scheduling algorithms are used in MCPTT networks, then network operations are simplified, but channel sensitivity and performance optimization are insufficient
Solution Approach 1:
The patent applies preliminary action by pre-calculating and assigning priority metrics to users before actual resource allocation occurs. The system pre-identifies MCPTT users and assigns them higher priority levels in advance, so that when resource allocation is needed during emergencies, the scheduling decision is already optimized without requiring complex real-time calculations
Data Source
AI summary
Provided are methods and apparatuses for prioritizing Mission Critical Push to Talk Traffic during an emergency, related to wireless communication networks, and more particularly to mission critical services in Long Term Evolution (LTE) communication networks. A channel sensitive MCPTT prioritization scheduling method and system are provided to increase the download/upload. speeds for MCPTT users during the emergency situations. Also provided are methods and systems for prioritizing traffic for connected User Equipments (UEs) over idle UEs.