tag:blogger.com,1999:blog-17500930.post8978261191171945901..comments2024-03-20T22:57:03.923+00:00Comments on Dean Bubley's Disruptive Wireless: HSUPA stalling?Dean Bubleyhttp://www.blogger.com/profile/05719150957239368264noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-17500930.post-56271048603226737022008-08-05T08:26:00.000+01:002008-08-05T08:26:00.000+01:00MoI was referring to non-QoS optimised VoIP over H...Mo<BR/><BR/>I was referring to non-QoS optimised VoIP over HSPA. Yes, the current variants of HSPA are not yet optimised for full CS-replacement VoIP. I'm not expecting outright replacement of circuit telephony for a long time.<BR/><BR/>But there are plenty of use cases for best-efforts VoIPo3G, either from carriers or third-parties. <BR/><BR/>HSPA provides good-enough capacity & latency for VoIP for both paid and free services. The main obstacle is probably power consumption on the device, and integration with applications like phonebook & SMS.<BR/><BR/>Whether the system vendors are in a position to directly support it is questionable - it may be provided more as an over-the-top Internet application instead. That said, I think there is a very good argument for VoIP-over-HSPA on femtocells, which could hook straight into the broadband NGN VoIP platform.<BR/><BR/>DeanDean Bubleyhttps://www.blogger.com/profile/05719150957239368264noreply@blogger.comtag:blogger.com,1999:blog-17500930.post-84604565546041034302008-08-03T12:52:00.000+01:002008-08-03T12:52:00.000+01:00Some facts :1. The predominant service trafficpatt...Some facts :<BR/><BR/>1. The predominant service traffic<BR/>pattern is *downstream* . As it is for<BR/>DSL, so it is for mobile comms.<BR/> <BR/>2. HSUPA is more complex to implement<BR/>than HSDPA. You have all the<BR/>nastiness of radio link diversity<BR/>(combining) etc that HSDPA does not<BR/>support. <BR/><BR/><BR/>And your comment on VoIP over HSPA<BR/>is incorrect. VoIP over HSPA<BR/>has an inherent problem in that HSPA<BR/>was intended for *best efforts*<BR/>increases in bit rate (it is not<BR/>Qos-aware) . As I worked on a systems<BR/>study for a vendor who was looking<BR/>at providing VoIP over HSPA, I am<BR/>quite familiar with the issues<BR/>(capacity, NE latency, QoS - MOS etc,<BR/>C-plane overheads - SIP etc) .Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17500930.post-57531911266125818422008-07-18T09:41:00.000+01:002008-07-18T09:41:00.000+01:00Hi SubraIt depends. If the networks enabled fast u...Hi Subra<BR/><BR/>It depends. If the networks enabled fast upload of 5MP images (the ones on my phone are about 1.5MBytes each), for free, to the user's own PC, without hurting battery life, then maybe.<BR/><BR/>But to be honest, most photos taken with phones don't "decay", but are just shown to friends on the phone's screen itself. <BR/><BR/>Or if the user wants to "free" the pictures, it's much easier to transfer them to a PC with a micro-SD or M2 card. I bought a 4GByte M2 card yesterday for £25 / $50 - memory has a faster price curve than network capacity.<BR/><BR/>You certainly wouldn't want to pay to put your photos decaying on an operator portal, which you lost access to when you churn - that would be the worst-case scenario for the user.<BR/><BR/>DeanDean Bubleyhttps://www.blogger.com/profile/05719150957239368264noreply@blogger.comtag:blogger.com,1999:blog-17500930.post-37558035469212036832008-07-18T04:01:00.000+01:002008-07-18T04:01:00.000+01:00With the right apps and user interface, wouldn't A...With the right apps and user interface, wouldn't ALL users love to background upload their 2 megapixel (e.g. iphone ) pictures over the air ? Rather than have them decay inside the phone ? <BR/><BR/>Note this doesn't even need HSUPA although HSUPA will certainly make it zippier and more spectrally-efficient. <BR/><BR/>At least in the US, what seems to be holding people back from this is: (a) expensive prices (b) cumbersome user interfaces (c) lack of awareness<BR/><BR/>Looks like the carriers are missing out on the potential of the uplink.Unknownhttps://www.blogger.com/profile/08346186990450396191noreply@blogger.com