LTE: What parameters are considered while creating MBSFN Area ? Is there any role of tracking area ?

Question

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 ?

Answer 1

Tracking area management is done to maintain balance between paging signalling and TAU procedures. Tracking area management comes under the mobility management and controlled by MME. In network deployment and management, size of each tracking area is decided.
MBMS is a kind of service which is subscribed by UEs and MBMS content provider provides the service. It is more inclined towards the service rather than network management. It is network decision whether it want to deliver content by using the MBMS channel or dedicated bearer.
If network decides to deliver content using MBMS network nodes then first it defines MBMS Service Area (consists of cell(s)).
Now network should find out list of MBSFN Areas which cover the cells comes under the MBMS Service Area.
Now the selected MBSFN Areas come under the same tracking area or different tracking area, it does not matter to enable this service. If UE is in idle mode and re-selected another cell which is part of ongoing MBMS service then it will continue receiving the content. If tracking area of a newly re-selected cell does not match with the present list of TAI then UE triggers TAU procedure. I don't think any relationship between Tracking Area and MBSFN Area.