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Tuesday, March 22, 2011

3GPP Official 'MBMS support in E-UTRAN' - Mar 2011

Last month I blogged about the MBMS feature in Rel-9. The 3GPP official presentation on MBMS is now available. Embedded below:

MBMS support in E-UTRAN - March 2011
View more presentations from Zahid Ghadialy
Presentation can be downloaded from Slideshare.

This presentation was a part of Joint one hour session of 3GPP RAN and 3GPP CT on March 16th 2011, 11.00 am – 12.00 p.m. More on this coming soon.

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6 comments:

  1. AnonymousMarch 24, 2011 at 10:30 AM

    This is useful...I remember hearing about MBMS back in 2009 but not understanding it very much. Thank you!

    I have some questions about LTE, I wondered if you knew the answers:
    1) Does LTE use IMEIs? I can't find any info on that.
    2) I read the MME stores IMSIs permanently. So is the IMSI sent over the air during every initial attach (like now), or only the very first time??

    Thanks :)

    ReplyDelete
  2. Zahid GhadialyMarch 24, 2011 at 12:33 PM

    Hi Anonymous, its always a good idea to provide some name. Your answers

    1. No it doesnt. I compiled a tutorial that is technical heavy (and for UMTS) if you want, its available at http://www.3g4g.co.uk/Tutorial/ZG/Mbms/

    2. MME does not store IMSI permenantly. Its stored in HLR or HSS. IMSI has to be sent over air interface when the UE is switched on for the first time or after long break otherwise TMSIs are used.

    ReplyDelete
  3. AnonymousJuly 17, 2011 at 8:29 AM

    Hi Zahid,

    Can you pls provide 3GPP reference for slide 6 "Frame Structure for shared carriers". I specifically need to understand the subframe ratios and semi-static configuration as defined in specs.

    -Avin.

    ReplyDelete
  4. Zahid GhadialyJuly 17, 2011 at 9:51 AM

    Please go through 36.440 and it should give you the right references.

    ReplyDelete
  5. RaúlFebruary 24, 2012 at 12:18 PM

    Hi Zahid,

    Maybe it is an obvious question but if MCE is the responsible of radio resources scheduling and also it transmits MTCH to UEs, how MBMS-GW knows which contents to send and to who (MBSFN areas)?
    Thanks.

    Raúl.

    ReplyDelete
  6. Zahid GhadialyFebruary 26, 2012 at 5:00 PM

    Raúl, not sure what you mean but the MBMS-GW is responsible for telling the MCE on Control plane to setup resources and then it broadcasts the data on user plane directly to eNB on the M1 interface.

    ReplyDelete