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Journey to QoS
LTE 8 LTE 9 LTE 10 LTE 11 LTE 12 LTE 13 LTE 14• VoLTE
• Enhanced QPP
• Mobile Data
• Support for LTE Band 14
• Location Services
• MBMS
• Emergency Calling
• Cell on Wheels
• Relays for LTE
• Increased Data Throughput
• 1.25W Devices on Band 14
• Group Communication Enablers
• Proximity-based Service (ProSe)
• MC Voice*
• ProSeEnhancements
• Isolated Operations
• eMBMSEnhancements
• MC Data*
• MC Video*
2009 2010 2011 2012 2013 2014 2015 20162008 2017
Actually started in 2008…
* Application Standards
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What Is QoS
• LTE & MCPTT standards provide parameters for prioritization of traffic on common network• 3GPP Rel 12 introduces new QCI parameters
for mission critical communications
• Provides users with prioritized access to network resources and guaranteed level of performance
• Tight integration between network and application is key to effectively implement prioritization • Dynamic QoS and priority via Rx interface
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Prioritization Tools
Allocation and Retention Priority
(ARP)
Admission Priority, Preemption capability, Preemption vulnerability
Scheduling Priority (QCI)
Scheduling and traffic prioritization QoS Class Indicator (QCI) – Packet Priority, Delay budget, Packet Error loss
Radio Admission Control (ACB)
Prevent entire classes of user from connecting to network using Access Class Barring (ACB)Access classes : 0-15
Service A
Rate and Bandwidth
Management
GBR – Guaranteed Bit Rate, Maximum Bit RateNon-GBR – Aggregate Maximum Bit Rate
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Why QoS Matters
• Can be used to manage network resources in real time as roles, locations and media types change
• Provide consistent, predictable performance for critical delay-sensitive applications, such as streaming video
• Intelligently allocate resources to those who need them most at that moment
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Why It Matters at an Incident in the Field
Incident Management System sets Priority and QoS based
on location and roleUsers in region assigned
corresponding priority
Users entering region automatically assigned
priority
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Different Levels of QoS
Static QoS
• Resources committed and reserved ahead of calls based on user’s provisioned level of service
Dynamic QoS
• Resources assigned dynamically when calls establishment
Policy-based QoS
• Dynamically based on policies in place:• User role• Application type• Location• Incident
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QPP Evolves from Static to Dynamic with Local Control
https://www.firstnet.gov/newsroom/blog/firstnet-works-psac-pscr-quality-service-priority-and-preemption-framework
FirstNet QPP Framework
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Without Integration - No Control
A Simple View of Network Integration
NETWORKPTT APP
App and Network lacks synchronization and integration required for MCPTT standard
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• Default Priority is elevated when incident occurs
• Incident detected by • Responder emergency button• Administration • Application analysis
• Application Server communicates with PCRF (via Rx interface) to elevate QoSpriority
Dynamic Prioritization with Rx Interface
User Role / Selection
Eligible Services
Service A
Service B
Service C
QoS Profile (QCI, ARP)
Participants’ QoS
Upgrade
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QoS Summary
• LTE and MCPTT standards provide needed parameters for prioritization of critical PTT traffic• New QCI parameters for mission critical communications
• Tight integration between network and application is key to effectively implement prioritization • Roles-based QoS and priority via Rx interface
• Coordination and Operational processes required for QoSassignment between networks