QoS Provision. for. Wireless Access. Networks DMRG

Transcription

1 QoS Provision Network #2 Core Network for Network #1 Switch Edge Router Internet Switch Access.... Network #3 Backbone Networks John Cushnie David Hutchison Distributed Multimedia Research Group www: QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 1

2 Access Networks b Access Networks Corporate/Academic/Public Usage, UK HP Labs, Bristol, UK QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 2

3 Network Architecture Uses standard s Multi Vendor Orinoco, Apple and Cisco so far Standard routers to the Internet and Core networks Open Access no admission control or authentication Best Effort service only Network #1.. Switch Network #2 Switch.. Edge Router Network #3 Core Network Internet Backbone Network provided for student/researcher departmental Internet access Service to be extended campus wide and into local area and Lancaster City Is Best Effort good enough? QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 3

4 Network and Traffic Shaper Server Core Network Network #1 Switch Traffic Shaper Server Edge Router Internet.. Backbone RedHat Linux Server Server runs on Free/GNU software Traffic shaping on Linux using tc and iproute2 Linux Advanced Routing Traffic Control (LARTC) QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 4

5 RedHat Linux Server DMRG Traffic Shaper Server Server runs on Free/GNU software Traffic shaping on Linux using tc and iproute2 Linux Advanced Routing Traffic Control (LARTC) Database implemented in MySQL Apache Web-server CGI Scripting using C, PHP and PERL Free/GNU software MRTG, Wave, SNR, ttt, Wave.. QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 5

6 QoS via Dynamic Bandwidth/Priority Allocation End User End User Access Point 1 Access Point 2 Network Device #1 Traffic Out Traffic In Switch Classifier Router Traffic Shaper Device #1 Device #2 #1 8MB Queue 1.1 Priority 1 Queue 1.2 Priority 2 Queue 1.3 Priority 3 #2 8MB Queue 2.1 Priority 1 Queue 2.2 Priority 2 Queue 2.3 Priority 3 #2 8MB Queue 3.1 Priority 1 Queue 3.3 Priority 2 Queue 3.3 Priority 3 #2 8MB Queue 4.1 Priority 1 Queue 4.2 Priority 2 Queue 4.3 Priority 3 100MB Classifier Edge Router Traffic Out Traffic In Core Network Internet Device #2 Strict Priority Schemes Class Based Queuing Custom Queuing Mechanisms Based on IP address, Application Port Traffic shaping on Linux using tc and iproute2 Linux Advanced Routing Traffic Control (LARTC) QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 6

7 QoS via Dynamic Bandwidth/Priority Allocation Network Switch Traffic Shaper Server (Linux Router) CQM Gateway Edge Router Internet Queue Manager Priority Queuing Bandwidth Division MRTG APM Monitor WCAPM Client/AP Mapper MySQL Database Client GUI Webpage Interface Charging/Accounting Platform Subscriber Admin Budget Records In: Ongestion In: Budget In: Priority Out: Priority Request Subscriber Administration System Authentication Budgets Accounts QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 7

8 Managing the Network s Data stored in MySQL database Data served by HTML and PHP Add/Delete/Halt monitoring of AccessPoints Automatic download of Details Summary of traffic and Clients QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 8

9 Monitoring the Network Traffic Measurement using MRTG Multi Router Traffic Grapher Data collected from network devices via SNMP Data served by HTML Widely used on the Internet MRTG Software available from: QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 9

10 Monitoring the Network Monitor by subnet or all subnets Monitor by individual access point QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 10

11 Monitoring the Network Challenges posed by the s s are propriety technology SNMP and/or HTML interfaces are supplied Undocumented MIBs Complicated HTML to parse out Limited documentation and functionality Bespoke software required for monitoring QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 11

12 Monitoring the Network - Orinoco Data collected from Orinoco s via SNMP Data stored in MySQL database Data served by HTML and PHP Note: 1. SSID (Service Set Identifier) is not available via SNMP 2. IP addresses/names not available via SNMP QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 12

13 Monitoring the Network - Cisco Data collected from Cisco s via HTML Data stored in MySQL database Data served by HTML and PHP Note: 1. SSID is now available via HTML 2. IP addresses/names are available via SNMP 3. Nicknames not supported QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 13

14 Radio Stats - SNR Data collected from Orinoco s via SNMP Data collected in MySQL database Data served by HTML and CGI SNR Software available from - QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 14

15 The Network Client Interface Peer IP Address NOT associated with an Peer IP Address associated with an Data served by HTML and PHP Client identified by IP address passed to the web-server Instant feedback to the user Help system for users QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 15

16 QoS via Dynamic Bandwidth/Priority Allocation Shaped Best Effort Best Effort Traffic shaping on Linux using tc and iproute2 Linux Advanced Routing Traffic Control (LARTC) Graph Software available from: QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 16

17 The Network Extending Functionality IPV6 Hybrid roaming networks, /IPV6/GSM/3G/4G etc. Usage Charging & Content Charging Metering using NeTraMet, IPFIX Authentication, Authorisation and Accounting (AAA) Radius Diameter Role your Own Network Fraud/Abuse Detection Database trend analysis Dimensioning Network Provision Database trend analysis QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 17

18 Research Objectives Data Capture and Network Monitoring From Internet Processing of data and representations Privacy of captured data Charging Models QoS /priority based charging models Implementation and evaluation AAA Architectures (IETF led) Use Of Diameter in fixed and wireless Internet AAA overhead evaluation QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 18

19 DMRG Some conclusions so far Data Capture Potentially enormous amounts of data Reducing data into information is vital Aggregation & Correlation Simplification is the key Privacy of captured data - difficult Charging Models Mobility and QoS are chargeable as premium services Combination charging models make sense Charge for access Charge for content Charge for QoS/Priority/Bandwidth Metering using standard protocols is required e.g. Diameter, IPFIX, QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 19

20 Related Research M3I - Market Managed Multiservice Internet GUIDE II Authentication, Authorisation and Accounting Architecture IETF AAA WG - Diameter Protocol QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 20

21 QoS Provision for Access Networks Any Questions? John Cushnie David Hutchison Distributed Multimedia Research Group www: QoS 2002, Dagstuhl, Germany - QoS Provision for Access Networks 21