tag:blogger.com,1999:blog-17500930.post8865662073466221511..comments2024-03-20T22:57:03.923+00:00Comments on Dean Bubley's Disruptive Wireless: LTE, mobile broadband & SMS - VoLGA vs. IMSDean Bubleyhttp://www.blogger.com/profile/05719150957239368264noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-17500930.post-78115191264103700712009-06-01T12:25:17.730+01:002009-06-01T12:25:17.730+01:00Hi Dean,
Good article, agree with the other 'post...Hi Dean,<br /><br />Good article, agree with the other 'posters' about SGs being an option as this is essentially the LTE evolution of Gs (i.e. enabling SMS (among other things) to be sent over the PS service to the terminal).<br /><br />Also I agree that VoLGA is a good alternative to having to build an IMS core just to replicate voice and sms services. However VoLGA doesn't exclude the option of providing value add from IMS through combinational services such as GSMA's videoshare/imageshare or RCS.<br /><br />I think one other very interesting point you raise is about MVNO's having to have their own IMS core. This could be viewed as a significant advantage for MVNO's who want to differentiate services, e.g. MVNO's targetting business customers, who want to provide an integrated SIP based call control in the enterprise and to the mobile device. Additionally with the significant improvements in latency provided by HSPA(+) this would enable deployments of these kinds prior to the availability of LTE devices. <br /><br />BR<br /><br />GarethGarethnoreply@blogger.comtag:blogger.com,1999:blog-17500930.post-20702142108451037812009-05-28T14:57:17.561+01:002009-05-28T14:57:17.561+01:00The previous speakers were correct. SMS over LTE ...The previous speakers were correct. SMS over LTE can be done without IMS. The non-IMS solution is provided in Rel 8 and that is SMS over CS. The name is a misnomer as it uses the CS core network domain, but it is carried using LTE air interface signalling. There is no disruption of LTE services. There are roaming issues between SMS over IMS and SMS over CS due to operators only wanting to support infrastructure for their solution. 3GPP is looking into ways to solve this, but the basic solution exists and has existed since Rel 8.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17500930.post-37603775137447870462009-05-27T17:47:18.137+01:002009-05-27T17:47:18.137+01:00SGs is part of the CS Fallback specs. It is only n...SGs is part of the CS Fallback specs. It is only needed if CS Fallback is deployed and the Gs interface on which it was based, was specified back at the beginning of GPRS. Gs is rarely, if ever, used in the mobile networks and that may be the fate of SGs too.<br /><br />The previous commenter is right that SMS would be sent without the handset actually switching off LTE. But this means CS Fallback requires changes to several other LTE control interfaces to tunnel SMS to the handset.<br /><br />SGs is a new interface for CS Fallback on both the MSC and MME. SMS through SGs will require every MME to support SGs but more importantly, the MSCs in the network need to be upgraded to support SGs. I cannot imagine operators being happy with spending more money on their MSCs just to support SMS on LTE!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17500930.post-56254111280909038762009-05-26T09:50:35.602+01:002009-05-26T09:50:35.602+01:00I hadn't heard about the Sgs thing. Potentiall...I hadn't heard about the Sgs thing. Potentially very interesting if it works perfectly transparently.<br /><br />It's notable that Stephen Hayes, the 3GPP Chair looking after LTE & who was at the event, didn't mention it. Clearly the T-Mobile speaker hadn't come across it either.<br /><br />If anyone has a link to some documentation I'd be grateful - and also give me any pointers to what the other implications might happen at server or on the device.Dean Bubleyhttps://www.blogger.com/profile/05719150957239368264noreply@blogger.comtag:blogger.com,1999:blog-17500930.post-79567857817961654732009-05-25T10:38:15.758+01:002009-05-25T10:38:15.758+01:00Dean,
I would suggest to check what the guy above...Dean,<br /><br />I would suggest to check what the guy above commented about SMS and Sgs interface.<br /><br />If it is true, then it means that sending SMS over LTE is not a problem and your post should be updated.<br /><br />Who is right?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17500930.post-60930355715332428112009-05-20T14:51:30.319+01:002009-05-20T14:51:30.319+01:00SMS can be delivered to the terminal using the Sgs...SMS can be delivered to the terminal using the Sgs interface without actually doing the CS fallback. I.e. the terminal remains in LTE access.<br />In a voice call the Sgs is used to page the subscriber and cause the terminal to move to a radio access technology supporting CS voice.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-17500930.post-4522164808029474662009-05-20T13:41:32.360+01:002009-05-20T13:41:32.360+01:00That's not going to change quickly, especially for...That's not going to change quickly, especially for roaming scenarios. <br /><br />In any case, PC-based SMS for the user (eg via the dashboard or another client) is currently about the only useful value-add that operators can provide on top of basic broadband access.Dean Bubleyhttps://www.blogger.com/profile/05719150957239368264noreply@blogger.comtag:blogger.com,1999:blog-17500930.post-3970388397456910262009-05-20T13:33:15.814+01:002009-05-20T13:33:15.814+01:00All the needs fulfilled by SMS would be accomplish...All the needs fulfilled by SMS would be accomplished in a more flexible, secure and reliable way using provisionning mechanisms linked with the use of Diameter. The problem with IMS here is not the architecture itself, it is the fact that Diameter is not used to its full potentialAntoinenoreply@blogger.com