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LTE: When MCE trigger MBMS session update procedure for an ongoing MBMS session?

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LTE: When MCE trigger MBMS session update procedure for an ongoing MBMS session?
posted Sep 28, 2014 by anonymous

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1 Answer

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There may be following reasons for the initiation of MBMS session update procedure.
1. Network has provided MBMS session identity.
2. A new MBMS service area has been added into ongoing sessions.
3. New Transport layer information (IP multicast address, IP source address, GTP DL TEID) has been added for an ongoing MBMS session.

answer Sep 29, 2014 by Harshita
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In case of UE specific data transmission MAC layer allocates radio resources on dynamic basis. When we say dynamic resource allocation it means in each TTI (subframe) different amount of data is sent over the over considering various factor QCI, amount of data buffered at RLC and available radio resource.
What about the MBMS data transmission. MBSFN subrames are fixed in radio frame for the MBMS data transmission. Is there really need of any dynamic resources allocation for the MBMS data comes from RLC layer or it is persistent since required modulation and coding other parameters are already known at the time of bearer establishment and these parameters does not change throughout the data transmission of MBMS data.

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