LTE MBMS: How "MBMS Service Area" AVP is encoded ?

Question

I have bit confusion in MCE and BMSC in the context of deciding boundary of MBMS service area.

Answer 1

When a BM-SC server starts a MBMS bearer service, it also tells where to multicast/broadcast.
A group of cells may be part of one MBMS service area.
MBMS service area is a group AVP and type is OctetString.
1. First Octet - tell # of MBMS area's
2. Second Octet onwards list of MBMS area code.
Each MBMS area code occupies 2 octets.