10-09-2016, 11:30 AM
1454347800-firstreview.pdf (Size: 202.28 KB / Downloads: 3)
Existing System Abstract:
• Presently the voice communication mainly provided by Public
Switched Telephone Network (PSTN).
• Circuit switch method is adopted in PSTN.
• A VPN enables to send data between two computers across the
shared or public internetwork in a manner that emulates the
properties of a point to point private link.
• MPLS VPN takes the advantage to provide secured data
networking, typically for business users, in conjunction with
other VPN technologies to help increase scalability while
keeping costs at a manageable level.
Proposed System Abstract:
• In computer networking and telecommunications, MULTI
PROTOCOL LABEL SWITCHING (MPLS) is a data carrying
mechanism, which emulates some properties of circuit switched
network over packet switched network.
• Branches of Corporate companies have normally distributed their
data and clients over the entire nation at least.
• They may require their own private, secure, faster and economic
data and voice network between corporate office and all branch
offices.
• Voice over IP (VOIP) is a methodology and group of
technologies for the delivery of voice communications and
multimedia sessions over Internet Protocol (IP) networks, such as
the Internet.
Other terms commonly associated with VoIP are IP telephony, Internet
telephony, Broadband telephony and Broadband phone service.
• The future trend is IP network only. VoIP is adopted in many countries,
because it leads to cost reduction for Telecom Companies.
• Telco’s need not have separate network for voice and data
communication. Customers also benefitted because they can use a
single device for all the type of services
Abstract:
• This paper investigates the performance of VoIP over
a BGP/MPLS VPN network from two different
aspects.
• The first aspect investigates the impact on VoIP
performance of the VPN tunnelling process.
• The second aspect is a study of the most common
VoIP codecs, namely, G.711, G.723.1 and G.729A
over the BGP/MPLS VPN network.
ADVANTAGES:
bandwidth efficiency is more optimized
• DISADVANTAGES:
implementing G.723.1 with more than one frame
per packet resulted in an unacceptable delay of more
than 260ms.
Conclusion:
• Deploying VoIP over the BGP/MPLS VPN network
model combines the advantage of both robust MPLS
technology and the security of a VPN solution.
• It was clear that the BGP/MPLS VPN network model
has a positive impact on VoIP performance when
contrasted with its performance over the MPLS
model
• The study also showed that G.729A is the most
efficient VoIP codec to be implemented over the
BGP/MPLS VPN network model.