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Technical report, IDE1121, March 2011 Call Setup Delay Analysis of H.323 and SIP Master’s Thesis in Computer Network Engineering Mukesh Malliah &a

Contents PREFACE ...

Call Setup Delay Analysis of H.323 and SIP 7 4.5 REAL-TIME TRANSPORT PROTOCOL (RTP) ...

Call Setup Delay Analysis of H.323 and SIP 9 1 INTRODUCTION 1.1 Application Area and Motivation The technology recently introduced in the telecom

the two exchanges over three types of traffic to find out the average call setup delay of H.323 signaling protocol. The call setup delay for th

Call Setup Delay Analysis of H.323 and SIP 11 2 BACKGROUND 2.1 IP Telephony Background In a basic telephone system, a call can be made

 Data Link layer The reliable service of transmitting the data through the physical link layer is carried out by the data link layer. Network and

Call Setup Delay Analysis of H.323 and SIP 13 2.3.3 Voice traffic Management by OSI In the Application layer, applications such as CISCO IP Communi

Physical Category 5 shielded twisted pair (UTP), Coaxial cable, Ethernet crossover cable and RJ11 are some physical technologies fro

Call Setup Delay Analysis of H.323 and SIP 15 bandwidth changes, and status and withdraw procedures between endpoints and gatekeepers. [2] 2.4.2 Q.

Call Setup Time Analysis of H.323 and SIP Master Thesis in Computer Network Engineering School of Information Science, Comput

2.5.1 Why SIP While comparing SIP with H.323, the SIP protocol is simple because it never requires full compatibility but for H.323 it requires ful

Call Setup Delay Analysis of H.323 and SIP 17 SIP Messages  INVITE: invites a user to make a call  BYE: terminate a connection between the 2 e

2.6 Comparison of H.323 and SIP Features H.323 SIP Extensibility The versions of H.323 are extended by the ITU standard with various new f

Call Setup Delay Analysis of H.323 and SIP 19 directly in large networks. networks like IMS networks. Call Forking The gatekeeper in H.323 can c

3 SOLUTION TO BE INVESTIGATED In this section we going to describe the factor to be tested and investigated in IP telephony. Our thesis is to inves

Call Setup Delay Analysis of H.323 and SIP 21 manager. Voice communication based on G.711 codec only can be handled between the calling

 Using the transport address the gateway 1 then send the call setup messages to the gateway 2.  After this the call will be established and star

Call Setup Delay Analysis of H.323 and SIP 23 Fig (3.3) Call setup of SIP with Proxy server. [9] 3.4 G.723.1 The encoding scheme G

4 NETWORK TOPOLOGY In this section we going to describe the network topologies used to test the H.323 signaling protocol and used to study the SIP

Call Setup Delay Analysis of H.323 and SIP 25 from the PC which supports data. To simulate the call setup time at various conditions, traffic is gen

4.1.1 Call Flow Diagram of H.323 Fig (4.1.1a) Call flow diagram between User A and Traditional phone The fig (4.1.1a) shown above represents the

Call Setup Delay Analysis of H.323 and SIP 27 Fig (4.1.1b) Call flow diagram between User B and Traditional phone The fig (4.1.1b) shown above rep

4.2 Network Topology of SIP call setup Fig (4.2) Logical Network topology of SIP The logical topology shown in the fig 4.2 represent

Call Setup Delay Analysis of H.323 and SIP 29 Fig (4.2.1b) Call flow diagram between SIP user agent B and traditional phone The fig

4.2.2 Session Description  H.245 For the session description, H.245 is used in H.323, where it can manage media capabilities, establ

Call Setup Delay Analysis of H.323 and SIP 31 transmitted to another tunnelling endpoint these UDP datagrams are then expanded and forwar

5 RESULTS 5.1 Call Setup Results on H.323 In the Cisco lab, with the help of Cisco routers and switches, the real time network topology as shown

Call Setup Delay Analysis of H.323 and SIP 33 FTP, Telnet, NTP, SMTP and POP messages are generated in the network along with our voice packets w

5.3 Call setup at various loads 5.3.1 No Load The first experiment in this call setup delay analyses is performed under ZERO load. In this process

Call Setup Delay Analysis of H.323 and SIP 35 Fig (5.3.1) Call Setup delay of H.323 at no load 5.3.2 Medium Load The fig 5.3.2a and 5.3.2b sh

Fig (5.3.2a) Start time to set a call in H.323 at normal load Call No Calls Made Between Process Time in Chart Call setup delay(ms) Call 1 5551-

Call Setup Delay Analysis of H.323 and SIP 37 Call 6 5552-5559 23.487-23.751 264 Call 7 5559-5552 20.043-20.311 268 Call 8 5556001-5552 21.300-21.56

Fig (5.3.2c) Call connected time of H.323 at normal load Arithmetic mean A = ∑ (call setup delay)/N A = 253ms Standard Deviation S = √ ((call se

Call Setup Delay Analysis of H.323 and SIP 39 5.3.3 Heavy Load Fig (5.3.3a) Start time to set a call in H.323 at heavy load

Fig (5.3.3b) Call connecting process of H.323 at heavy load

Call Setup Delay Analysis of H.323 and SIP 41 Fig (5.3.3c) Call connected time of H.323 at heavy load The final step to analyze the call setup t

Call No Calls Made Between Process Time in Chart Call setup delay(ms) Call 1 5551-5556001 10.649-10.911 262 Call 2 5551-5559 14.346-14.687 341 Call

Call Setup Delay Analysis of H.323 and SIP 43 5.4 Call Setup Delay results on SIP The call setup results of H.323 are done experimentally.

6 CONCLUSION In our thesis, we experimentally analysed the call setup delay for H.323. Using the existing materials, we surveyed the call setu

Call Setup Delay Analysis of H.323 and SIP 45 7 References [1] Steve Shergold, Internet Telephony: An Introduction, Article: Compliance Eng

Call Setup Delay Analysis of H.323 and SIP 1 Preface We would like to thank Halmstad University for giving us a platform to complete our Master Thes

Call Setup Delay Analysis of H.323 and SIP 47 Appendix A: Call Manager Configuration Building configuration... Current configuration : 2802 bytes

interface Loopback58 ip address 192.58.7.1 255.255.255.0 ! interface FastEthernet0/0 bandwidth 64 no ip address shutdown duplex auto speed aut

Call Setup Delay Analysis of H.323 and SIP 49 voice-port 0/2/1 signal groundStart cptone SE impedance complex2 music-threshold -70 ! dial-peer v

! ephone-dn 3 dual-line number 5553 call-forward busy 5 call-forward noan 5 timeout 18 ! ephone-dn 4 dual-line number 5554 call-forward bus

Call Setup Delay Analysis of H.323 and SIP 51 ! ephone 6 no multicast-moh ! line con 0 line aux 0 line vty 0 4 login ! scheduler allocate 20000 1

D 192.168.7.0/24 [90/30720] via 192.168.50.1, 02:19:38, FastEthernet0/1 C 192.168.50.0/24 is directly connected, FastEthernet0/1 D 192.168.

Call Setup Delay Analysis of H.323 and SIP 53 hidekeys ! interface FastEthernet0/0 no ip address duplex auto speed auto ! interface FastEtherne

! router eigrp 100 network 10.0.0.0 network 192.168.0.0 0.0.255.255 no auto-summary ! ip forward-protocol nd ! ip http server no ip http secure-

Call Setup Delay Analysis of H.323 and SIP 55 line vty 0 4 login ! scheduler allocate 20000 1000 end IP Interface Brief Interface

Abstract IP Telephony is a technology which uses internet and signalling protocols like H.323 and SIP to setup and transfer voice signals from

D 192.58.7.0/24 [90/156160] via 192.168.50.2, 02:22:05, FastEthernet0/0.50 C 192.168.7.0/24 is directly connected, FastEthernet0/0.7 C 192.

Call Setup Delay Analysis of H.323 and SIP 57 ! archive log config hidekeys ! interface FastEthernet0/0 ip address 192.168.4.1 255.255.255.0 ip

no ip http secure-server ! nls resp-timeout 1 cpd cr-id 1 ! control-plane ! ccm-manager fax protocol cisco ! gatekeeper zone local gk1.gw1.com gw1.

Call Setup Delay Analysis of H.323 and SIP 59 D 10.10.1.0 [90/30720] via 10.10.2.2, 02:41:10, FastEthernet0/1 C 10.10.2.0 is directly co

spanning-tree mode pvst spanning-tree extend system-id ! vlan internal allocation policy ascending ! vlan 10 name Data ! vlan 20 name Voice ! vlan

Call Setup Delay Analysis of H.323 and SIP 61 no switchport no ip address ! interface FastEthernet0/6 switchport mode access ! interface FastEthe

interface FastEthernet0/19 ! interface FastEthernet0/20 ! interface FastEthernet0/21 ! interface FastEthernet0/22 ! interface FastEthernet0/23 ! int

Call Setup Delay Analysis of H.323 and SIP 63 FastEthernet0/2 unassigned YES unset down down FastEthernet0/3 un

C 10.10.1.0 is directly connected, FastEthernet0/7 C 10.10.2.0 is directly connected, FastEthernet0/8 D 192.58.7.0/24 [90/158720] via

Call Setup Delay Analysis of H.323 and SIP 65 speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface

Call Setup Delay Analysis of H.323 and SIP 3 List of Acronyms ATM Asynchronous Transfer Mode ACELP Algebraic Code Excitation CO Central Office CM Ci

E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia -

Call Setup Delay Analysis of H.323 and SIP 67 ! no aaa new-model system mtu routing 1500 ip subnet-zero ! no file verify auto spanning-tree mode pvs

interface FastEthernet0/9 switchport access vlan 80 switchport mode access ! interface FastEthernet0/10 switchport mode access ! interface FastEt

Call Setup Delay Analysis of H.323 and SIP 69 interface GigabitEthernet0/2 ! interface Vlan1 no ip address shutdown ! interface Vlan10 no ip addr

50 PBX active Fa0/24 80 traffic active Fa0/9 1002 fddi-default a

QOS Quality of Service RTP Real-time Transport Protocol RAS Registration, Admission and Status RTCP Real-Time Transmission Control Protocol SIP Sess

Call Setup Delay Analysis of H.323 and SIP 5