IMPROVING QOS FOR VOIP SESSION ESTABLISHMENT WITH SIP CHANNEL REALLOCATION SCHEME

Presentation by: Anil Kumar Marikukala

Syed Khaja Najmuddin Ahmed

OUTLINE:

• Introduction.

• Reasons for SIP Trunk failure.

• Consequences of SIP trunk failure.

• SIP Trunking demo.

• Mechanisms to improve QoS.

• Preferred solution.

• Future research.

INTRODUCTION:

•SIP : Session Initiation Protocol.•Used to establish a session between two users.•Establishes session using SIP Trunk.

REASONS FOR SIP TRUNK FAILURE:

•Overflow of the network.•An improper telephony solution.•Physical damage.

CONSEQUENCES OF TRUNK FAILURE:

•Users looses connection during the call.• It is difficult to get back the trunk as it involves knowledge of whole network skeleton.

SIP TRUNKING DEMO:

• SIP Trunk established between two Asterisk machines.

MECHANISMS TO IMPROVE QOS:

Three Enhanced Priority schemes:

1. One Server/Four Trunk Scenario.

2. Four Server/Four Trunk Scenario.

3. Four Server/One Trunk Scenario.

1. ONE SERVER/FOUR TRUNK SCENARIO:

2. FOUR SERVER/FOUR TRUNK SCENARIO:

3. FOUR SERVER/ONE TRUNK SCENARIO:

PREFERRED SOLUTION:

•We prefer 3rd scenario => Four Server/One Trunk Scenario.•Because of a block which decides the distribution of traffic in trunks.

FUTURE RESEARCH:

•The EPS module algorithm.•Compatible with different protocols.•Exceptions can be add to the module to reject the unwanted traffic.

THANK YOU..!!