top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

LTE: Is it possible during MBMS data transmission few of the eNodeBs have less MBMS resources compare to others ?

0 votes
255 views

One question came out and want to get answer for that just to avoid assumptions what I have.
A multiple MBMS services are being transmitted over the air through eNodeBs belong to one MBSFN Area. Here I considered all the eNodeBs belongs to that particular MBSFN area have maximum six sub frames of a radio frame to broadcast the content and all eNodeBs are doing.
In between some of the eNodeBs belong to same MBSFN Area get congested and out of 6 sub frames only two subframes are being used in those eNodeB.
My first question where exactly things will be affected ?
Another question, MBMS-GW will be sending data in same speed with same SYNC information. Since few eNodeBs are congested then how data will be transmitted ? Segmentation at eNodeB RLC may affect User experience since UE combines the data in MBMS case from all the neighboring eNodeBs and get better result in term of quality.
If one eNodeB is sending data without segmentation and the other one is sending with segmentation then How UE RLC will behave and what will be the user experience ?

Please ignore these question if segmentation and reassembling is not applicable for MBMS data transmission at RLC.

posted Nov 18, 2016 by Rupam

Looking for an answer?  Promote on:
Facebook Share Button Twitter Share Button LinkedIn Share Button

Similar Questions
+1 vote
LTE: Does RLC segmentation and reassembling applicable for MBMS data ?

MBMS Data receives from MBMS-GW to eNodeB module interfacing towards MBMS-GW. It removes GTP-U header and sends data to lower layer i.e RLC. As per my understanding so far, RLC does segmentation and re-assembling for the received upper layer PDU to make it fit into MAC PDU. Now I want to know, Does the same concept applicable for MBMS data also or for RLC it is transparent mode transmission.

Which format is used by RLC for the MBMS transmission ?

0 votes
LTE: Does the MAC perform dynamic scheduling for MBMS data or it is persistent throughout the MBMS session duration ?

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.

+1 vote
LTE: What type of data is considered for transparent mode (TM) transmission in LTE RLC ?

RLC is one of the L2 layer in LTE radio protocol stack. It does many functions such as segmentation, re-assembling and along with that it supports various transmissions mode like transparent mode, acknowledgement mode and un-acknowledgement mode.
Now I want to understand for which type of RLC SDUs and PDUs transparent mode transmission is used.
Does the RLC create single RLC entity at cell level or at the UE level or at the bearer level ?

+2 votes
LTE: Is it necessary all the cells belong to same MBSFN area should have same amount multicast/broadcast resources ?

Within the LTE network, different eNodeBs can be deployed with the different bandwidth configuration. Few eNodeBs may be deployed with 10 MHz and few with the 20 MHz. Now I have two questions here.
1. Is it necessary all the cells should have same bandwidth deployment ? If answer is yes then ignore the second question.
2. If cells of the same MBSFN area can have different deployment bandwidth then they would have different amount of multicast resources and what if when a cell exhaust with the allocated MBMS radio resources ? What corrective action MCE should take in this case when few cells of a MBSFN area does not enough room to accommodate new services and other set of cells within the same MBSFN area can serve ?

...