Journal of Optical Communications and Networking
Vol. 6,
Issue 8,
pp. 695-704
(2014)
•https://doi.org/10.1364/JOCN.6.000695

QoS Enhancement of Live IPTV Using an Extended Real-Time Streaming Protocol in Ethernet Passive Optical Networks

I-Shyan Hwang, AliAkbar Nikoukar, Ku-Chieh Chen, Andrew Tanny Liem, and Ching-Hu Lu

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I-Shyan Hwang, AliAkbar Nikoukar, Ku-Chieh Chen, Andrew Tanny Liem, and Ching-Hu Lu, "QoS Enhancement of Live IPTV Using an Extended Real-Time Streaming Protocol in Ethernet Passive Optical Networks," J. Opt. Commun. Netw. 6, 695-704 (2014)

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Abstract

Internet protocol TV (IPTV) is one of the most important multimedia applications for next-generation networks. IPTV provides triple-play services that require high-speed access networks with the functions of multicasting and quality of service (QoS) guarantees. Among access networks, Ethernet passive optical networks (EPONs) are regarded as among the best solutions to meet higher bandwidth demands. In this paper, we propose a new architecture for multicasting live IPTV traffic in EPONs. The proposed mechanism involves assigning a unique logical link identifier to each IPTV channel. To manage multicasting, a table in the optical line terminal (OLT) and in each optical network unit (ONU) is constructed. These tables are maintained in the reconciliation sublayer to deliver the IPTV traffic. We extend the message passing of the original real-time streaming protocol (RTSP), called the extended RTSP (ERTSP), to handle the IPTV requests. A mechanism is proposed to handle the IPTV requests as intra traffic in the ONU without sending the request to the OLT. Handling the live IPTV channel as intra traffic can save bandwidth in the feeder fiber and increase the system throughput. Simulation results show that our proposed architecture can improve the system performance and QoS metrics in terms of packet delay, jitter, system throughput, and packet loss.

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Function	Arguments	Object	Task
Extract	packet	OLT, ONU	Extract the channel name from the packet.
Check	channel_name	OLT, ONU	Determine whether the channel name exists in the table.
Send_metadata	channel_name, ONU_LLID	OLT	Send the metadata to the ONU.
Save_metadata	channel_name	ONU	Save the metadata in the ONU.
Retrieve_metadata	channel_name, user_MAC	ONU	Send the metadata to the user.
Add_table	CLLID, name, user_MAC	ONU	Add a record to the ONU table for the user request.
Start	channel_name, user_MAC	ONU	Start sending the live IPTV channel streaming data to the user.
Stop	CLLID, channel_name, user_MAC	OLT, ONU	The OLT stops broadcasting the live IPTV channel. The ONU stops passing the live IPTV channel data to the user from the OLT.
Remove_table	CLLID, channel_name, user_MAC	ONU	Remove the user_MAC from the table in the ONU.
Authentication	channel_name, user_info	ONU	Authenticate the user.
Request_LLID	channel_name	OLT	Assign a unique LLID to the new channel (CLLID).
Add_LLID	channel_name, CLLID	OLT	Add the new CLLID to the OLT table.
Add_ONU	channel_name, ONU_LLID	OLT	Add a record to the OLT table for the ONU request.
Delete	channel_name, ONU_LLID	OLT	Remove the ONU LLID from the OLT table.

Method	Task
OPTIONS	Describe the request types of RTSP that the server will accept.
DESCRIBE	Describe the ERTSP URL, the presentation description, the type of reply data, channel name.
SETUP	Set up the transport port specifier.
PLAY	Start to deliver the live IPTV stream.
TEARDOWN	Terminate the live IPTV stream.

Simulation Environment	Value
Number of OLT	1
Number of ONUs	16, 32
Upstream/downstream link capacity	$1 Gb / s$
OLT-ONU distance (uniform)	10–20 km
Max cycle time	1.5 ms
Guard time	5 μs
DBA computation	10 μs
Control message length	512 Kb
ONU buffer size	10 MB
Channel bit rate	$10 Mb / s$

Function	Arguments	Object	Task
Extract	packet	OLT, ONU	Extract the channel name from the packet.
Check	channel_name	OLT, ONU	Determine whether the channel name exists in the table.
Send_metadata	channel_name, ONU_LLID	OLT	Send the metadata to the ONU.
Save_metadata	channel_name	ONU	Save the metadata in the ONU.
Retrieve_metadata	channel_name, user_MAC	ONU	Send the metadata to the user.
Add_table	CLLID, name, user_MAC	ONU	Add a record to the ONU table for the user request.
Start	channel_name, user_MAC	ONU	Start sending the live IPTV channel streaming data to the user.
Stop	CLLID, channel_name, user_MAC	OLT, ONU	The OLT stops broadcasting the live IPTV channel. The ONU stops passing the live IPTV channel data to the user from the OLT.
Remove_table	CLLID, channel_name, user_MAC	ONU	Remove the user_MAC from the table in the ONU.
Authentication	channel_name, user_info	ONU	Authenticate the user.
Request_LLID	channel_name	OLT	Assign a unique LLID to the new channel (CLLID).
Add_LLID	channel_name, CLLID	OLT	Add the new CLLID to the OLT table.
Add_ONU	channel_name, ONU_LLID	OLT	Add a record to the OLT table for the ONU request.
Delete	channel_name, ONU_LLID	OLT	Remove the ONU LLID from the OLT table.

Method	Task
OPTIONS	Describe the request types of RTSP that the server will accept.
DESCRIBE	Describe the ERTSP URL, the presentation description, the type of reply data, channel name.
SETUP	Set up the transport port specifier.
PLAY	Start to deliver the live IPTV stream.
TEARDOWN	Terminate the live IPTV stream.

QoS Enhancement of Live IPTV Using an Extended Real-Time Streaming Protocol in Ethernet Passive Optical Networks

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Tables (3)

Journal of Optical Communications and Networking