Performance Evaluation of Concurrent Multipath Video Streaming in Multihomed Mobile Networks

Table 1

Features of the three schemes.

	Always Best Connected (ABC) NEMO	Concurrent multipath transfer (CMT) NEMO	cmt-SCTP
Use of paths	Switched sequential transmission.	Concurrent transmission.	Concurrent transmission.
Bandwidth	A trade-off against path switching overhead.	Effective bandwidth; aggregation is achieved. Aggregation is suboptimal due to the relatively small overhead required to prevent out-of-sequence packet delivery (average 14 ms).	Effective bandwidth aggregation.
Aggregation	Higher levels of aggregation lead to increased switching overhead and lower QoE for the user.		The reliable nature of SCTP can reduce throughput due to both control messages and retransmissions.
Path switching overheads	Average 137 ms [12].	No path switching delay incurred.	No path switching delay incurred.
Control plane overheads	Initial session setup control messages.	Initial session setup control messages.	Messaging for acknowledgement of; delivery, retransmissions, and congestion control throughout streaming session.
	Path switching REQ and ACK between CN and HA for every path switching operation.	No path switching messages during session.
Multihoming requirement	The HA and the MR in the infrastructure are multihomed.	The HA and the MR in the infrastructure are multihomed.	All end hosts are multihomed.
Mobility support	All mobile hosts in the whole mobile network.	All mobile hosts in the whole mobile network.	An individual mobile host only.