AeroMACS QOS Concepts and Applications
Exploring the diverse Quality of Service (QOS) concepts in AeroMACS technology, including Unsolicited Grant Service, Real-time Polling Service, Non Real-Time Polling Service, and Best Effort. Delve into IP Quality of Service with Diffserv reassignment and packet classification using concepts like Expedited Forwarding and Assured Forwarding. Uncover the mapping of applications to QOS parameters in the AeroMACS system for efficient data transmission.
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Presentation Transcript
AeroMACS QOS 1 HONEYWELL - CONFIDENTIAL File Number
Contents QOS concepts AeroMACS QOS IP QOS Diffserv Concepts Applications & QOS mapping Device Classes Device Identification & Provisioning 2 HONEYWELL - CONFIDENTIAL File Number
AeroMACS service flows Type of Service Features Applications Unsolicited Grant Service (UGS) Periodic B/W of equal size allocated as per the request made during connection establishment. No dynamic negotiations possible Less B/W management overheads Suitable for real-time traffic of fixed data length at periodic intervals Examples: Voice, T1/E1 service, VOIP etc., Critical sensor traffic Real-time Polling Service (rtPS) Periodic B/W negotiation opportunities are provided and B/W size is negotiated at every opportunity SS provided with uni-cast request opportunities. SS can request for variable data size when the opportunity is available. Suitable for real-time with variable data sizes or critical applications that requires guaranteed service Examples: MPEG Video Streams, Periodic Broadcasts like ADS-B/TIS-B , Air Traffic Control messages, Non Real-Time Polling Service nrtPS Suitable for non real-time traffic BS typically polls SS in regular basis with intervals of 1 sec or lesser ( Minimum Guaranteed) . SS can use contention based request for bandwidth allocation Suitable for non-real-time lesser critical applications. Example : File transfer , AOC applications Best Effort Suitable for general low priority traffic which does not require any guaranteed service level Example : Web Browsing , Mail transfer 3 HONEYWELL - CONFIDENTIAL File Number
IP- Quality Of Service Re assigned for Diffserv However TOS is not generally implemented. Instead reassigned to Diffserv (RFC 2474) . IPv4 & IPv6 use Diffserv definitions. 4 HONEYWELL - CONFIDENTIAL File Number
Diffserv concepts Diffserv is used to classify and mark the packets so that packets are treated with different QOS . TOS bits of IP header is redefined for Diffserv Expedited Forwarding (EF) Low delay, Low Jitter & Low Loss Assured Forwarding (AF) BW assured for this traffic Packet drop precedence can be defined within this class. Default (BE) Generic traffic with best effort transmission AF packet drop precedence definition Assured Forwarding (AF) Behavior Group Class 1 Class 2 Class 3 Class 4 Low Drop AF11 (DSCP 10) AF21 (DSCP 18) AF31 (DSCP 26) AF41 (DSCP 34) Med Drop AF12 (DSCP 12) AF22 (DSCP 20) AF32 (DSCP 28) AF42 (DSCP 36) High Drop AF13 (DSCP 14) AF23 (DSCP 22) AF33 (DSCP 30) AF43 (DSCP 38) 5 HONEYWELL - CONFIDENTIAL File Number
Applications and QOS Mappings Aero MACS SV rtPS rtPS rtPS rtPS Applications Type PHB DSCP Priority Network Control VOIP ATC CPDLC, ADS-C, ADS-B, CM VOIP AOC VOIP Ground Video Applications FIS, METAR, NOTAM Airline Operation Control SW Upload, Dataload, FTP etc., Default NET PTT AF31 AF32 AF33 AF21 011010 011100 011110 010010 1 2 3 4 ATS-High PTT PTT VIDEO ATS-LOW AOC-High AOC-Low DEFAULT AF22 010100 rtPS 5 AF23 AF11 AF13 DF 010110 001010 001110 000000 nrtPS nrtPS nrtPS BE 6 7 8 9 Approach similar to ATN-IPS manual (DOC 9896) 6 HONEYWELL - CONFIDENTIAL File Number
Device Classes Aircraft Aero SV rtPS rtPS rtPS rtPS nrtPS nrtPS Applications Type PHB DSCP Priority Network Control VOIP ATC CPDLC, ADS-C, ADS-B, CM VOIP AOC FIS, METAR, NOTAM Airline Operation Control SW Upload, Dataload, FTP etc., Default NET PTT AF31 AF32 AF33 AF21 AF23 AF11 011010 011100 011110 010010 010110 001010 1 2 3 4 6 7 ATS-High PTT ATS-LOW AOC-High AOC-Low DEFAULT AF13 DF 001110 000000 nrtPS BE 8 9 Surface Vehicles Aero SV rtPS rtPS rtPS BE Applications Type PHB Priority Network Control SMGCS - Surveillance VOIP Ground Default NET AF31 AF33 AF22 DF 011010 011110 010100 000000 1 3 5 9 ATS-High PTT DEFAULT 7 HONEYWELL - CONFIDENTIAL File Number
Device Classes Video Sensors Applications Type PHB Aero SV Priority Network Control Video Applications Default NET VIDEO DEFAULT AF31 AF22 DF 011010 010100 000000 rtPS rtPS BE 1 5 9 Ground Critical Applications Type PHB Aero SV Priority Network Control Critical ATS Sensor Data Default NET AF31 AF33 DF 011010 011110 000000 rtPS rtPS BE 1 3 9 ATS-High DEFAULT Ground Default Applications Type PHB Aero SV Priority Network Control Default NET AF31 DF 011010 000000 rtPS BE 1 9 DEFAULT 8 HONEYWELL - CONFIDENTIAL File Number
Device Type Identification tbsCertificate.subject shall be used to distinguish different types of certificates During Logon AAA server identifies the device type and based on user profile provisions the set of service flows Certificates have device Type Identified AAA tbsCertificate.subject : <Device Type><Id> AeroMACS CPE ASN ASN / BS configured to support all service flows identified 9 HONEYWELL - CONFIDENTIAL File Number
Thank You 10 HONEYWELL - CONFIDENTIAL File Number
