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LTE: Does the eNodeB schedule data for an UE in a particular sub frame allocated for the MBMS data transmission ?

+1 vote
LTE: Does the eNodeB schedule data for an UE in a particular sub frame allocated for the MBMS data transmission ?
posted Oct 22, 2016 by Rupam

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2 Answers

0 votes

As per my knowledge, eNodeB does not schedule UE specific data on PDSCH. I meant to say PDSCH channel is not used in radio sub frame which is being used for MBMS data transmission. However, few channels like PHICH, PCFICH, PDCCH and cell specific reference signals are used to in MBMS sub frame. First one or two OFDM symbol in MBSFN sub frame allocated for the control region as in the normal subframe.

answer Oct 24, 2016 by Harshita
As per specification subframes 1,2,3,6,7,8 are reserved for MBMS data, if in that particular moment if mbms data is not available for that UE thn eNB can schedule that UE for normal data transmission(if normal data available).

For Ex: for UE with rnti-50 have MBMS data and normal data. but SFN-100 SF-2 (SF-2 is normally reserved for MBMS data transmission) mbms data not available to schedule thn eNB can schedule it for normal data transmission.

Note: But all other SFs like 0,4,5,9 are for normal data transmission but these SFs should not use for MBMS eventhough normal data not available in those SFs.
0 votes


Yes, Multimedia data also includes scheduling part. Enb will send DCI with M-RNTI scrambled in PDCCH.

answer Oct 24, 2016 by Jaganathan
Similar Questions
+2 votes

I came to know total six subframes of a radio frame can be used for MBSFN transmission. How UE come to know about exact number of sub frames that are being used in a radio frame ? Does the eNodeB send this information to UE or UE itself figure out ?

0 votes

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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