X2-AP: Benefits of having multiple streams of SCTP for the X2-AP protocol ?

Question

How does X2-AP protocol leverage multi stream feature of SCTP protocol for its own functionality ?

Answer 1

If I understood your question correctly then below is the answer of same.

When SCTP association gets established between two eNodeBs for X2-AP protocol, following things would be applicable.

1. A single pair of stream identifier shall be reserved for the sole use of X2-AP non-UE associated signalling.
2. At least one pair of stream identifier shall be reserved for UE-associated signalling. Few more pairs of stream identifiers should reserved.
3. A single UE-associated signalling shall use one SCTP stream and the stream should not be changed during the communication of the UE-associated signalling.

Reference:
3GPP TS 36.422