Quality of Service (QoS)
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1 Net Neutrality Scott Jordan Department of Computer Science University of California, Irvine Quality of Service (QoS) more interactive less interactive telephone calls video conferencing Internet radio Internet tv web browsing express mail priority mail first class mail bulk mail better performance worse performance Net Neutrality / Scott Jordan 2 1
2 Quality of Service (QoS): Only two ways to provide QoS: (1) eserve some bandwidth for selected streams, and limit the traffic in this bandwidth segment. Example toll lane (when toll depends on congestion to limit traffic) (2) ive priority to some selected streams. Example priority mail Net Neutrality / Scott Jordan 3 Basis for QoS the application, e.g. Cox decides which applications get low priority (in trial) the service provider, e.g. Cox VoIP subscribers packets get high priority the source and/or destination, e.g. Comcast terminates selected connections from own subscribers to non Comcast subscribers (not anymore) payment, e.g. ISP gives high priority to all of a subscriber s VoIP packets if that option is purchased Net Neutrality / Scott Jordan 4 2
3 The wrong way: QoS based directly on application FCC AT&T uses DPI & assigns priority to all VoIP packets AT&T Verizon uses DPI & assigns priority to all VoIP packets Verizon UCI equires each ISP to do DPI (ugh). Cenic Not what diffserv envisioned. Net Neutrality / Scott Jordan 5 The wrong way: QoS purchased from each ISP on a route AT&T sells QoS to UCI FCC AT&T Verizon sells QoS to UCI Verizon UCI equires an application i provider to contract with Cenicmultiple ISPs (ugh). Not consistent with diffserv! Net Neutrality / Scott Jordan 6 3
4 The right way: QoS purchased by subscriber and passed on via SLA FCC AT&T honors priority if within subscriber agreement AT&T Verizon honors priority assigned by AT&T if part of Service Level Agreement Subscriber marks packet priority, e.g. to VoIP Verizon UCI Differentiation, not Discrimination! i i QoS available Cenic to all apps. QoS available end to end. This is the diffserv architecture! Net Neutrality / Scott Jordan 7 The right way: QoS purchased by subscriber and passed on via SLA FCC AT&T Verizon subscriber UCI QoS offerings & prices Cenic QoS selection ISP Net Neutrality / Scott Jordan 8 4
5 Pro Net Neutrality Application Providers e.g. oogle, Amazon, Microsoft, Yahoo, want to be able to access QoS worried that ISPs will only use QoS for themselves worried that ISPs will offer exclusive QoS deals worried that QoS will not be available end to end are willing to pay for QoS but only to their own ISP not to terminating ISP Net Neutrality / Scott Jordan 9 Pro Net Neutrality Public Interest roups e.g. Free Press, Public Knowledge, CDT, want a prohibition on blocking want to be able to access QoS some used to be opposed to QoS now want nondiscriminatory access to QoS mixed opinions about paying for QoS usually ok with consumers paying usually not ok with application providers paying Net Neutrality / Scott Jordan 10 5
6 Anti Net Neutrality Internet Service Providers e.g. AT&T, Verizon, Cox, Comcast, Time Warner using QoS for their own services aren t yet thinking about selling QoS aren t yet thinking about end to end QoS opposed to new law/regulation don t want to be forced to offer QoS want exemption for specialized services want exemption for wireless networks if offer QoS, don t want regulation on exclusiveness or price Net Neutrality / Scott Jordan 11 FCC Open Internet Order Scope Transparency Blocking Discrimination Wireless Specialized Services Net Neutrality / Scott Jordan 12 6
7 Broadband Internet Access Service only applies to providers of mass market retail service to/from substantially all Internet endpoints thus may exclude campus networks but may include the ISPs of universities Net Neutrality / Scott Jordan 13 Transparency requires disclosure by ISPs of network management practices, performance, terms of service to consumers & to application & device providers including congestion control, blocking, device attachment, pricing, g,privacy, security not including detailed spam or security info Net Neutrality / Scott Jordan 14 7
8 Blocking on Fixed Internet Access prohibits blocking of lawful content, applications, or non harmful devices: blocking based on political speech blocking based on source or destination charging for delivery except reasonable network management : blocking for network security (e.g. DoS) anything controlled by the end user, including spam & parental controls Net Neutrality / Scott Jordan 15 Discrimination on Fixed Internet Access prohibits unreasonable discrimination: application based congestion control or QoS, if anti competitive payment for QoS by remote application providers QoS exclusively for an ISP s own applications (but see specialized services later ) except reasonable network management : anything controlled by the end user, including tiering, QoS, usage based pricing application agnostic congestion control Net Neutrality / Scott Jordan 16 8
9 Mobile Internet Access prohibits blocking of lawful websites blocking of competing voice/video applications does not prohibit blocking of other applications blocking of non harmful devices unreasonable discrimination Net Neutrality / Scott Jordan 17 Specialized Services What are they? not broadband Internet access service including VoIP, video/ip may include many other IP based services Not regulated but will be monitored Net Neutrality / Scott Jordan 18 9
10 Current Status Courts FCC s legal authority to be litigated Congress attempts to blocking implementation attempts to strengthen rules Net Neutrality / Scott Jordan 19 Convergence Telephone network Cell phone networks Internet Everything Over IP Internet Cable tv networks Net Neutrality / Scott Jordan 20 10
11 Fixed versus mobile Different expectations of blocking and discrimination on smart phone versus desktop computer? on smart phone on 3 versus on Wi Fi? Net Neutrality / Scott Jordan 21 Specialized Services Skype gaming Netflix Vonage Video conferencing U verse video Hulu QoS Net Neutrality / Scott Jordan 22 11
12 End to end QoS AT&T assigns priority only to specialized services FCC AT&T Verizon UCI Cenic Net Neutrality / Scott Jordan 23 A proposal If an ISP uses QoS for its own applications then it shall make QoS available without unreasonable discrimination to subscribers (both residential and business) and to other ISPs. Apply to both fixed & mobile Don t define Specialized Services Net Neutrality / Scott Jordan 24 12
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