1. APPLICATIONS
MAINTAINING LIVE GSM
NETWORK
OMC DEPARTMENT
HARSHIT TRIVEDI (11BEC091)
TRAINEE AT NOKIA NETWORKS(FORMERLY NSN)
DEPARTMENT HEAD
MR. BHAVIN MODI
GUIDED BY
PROF. KHYATI VACHHANI

2. Where OMC stands in GSM architecture

3. OVERVIEW
OMC and its purpose in Telecom
Digital transmission protocols
Network management system
Application applied during the project
Conclusion

4. OMC IN TELECOM
 There are total four departments in NSN
RF Planning and Optimization
OMC-Transmission
BSS
Switching
 OMC(Operation and Maintenance Centre) is heart of
telecommunication.
 Very crucial department and working 24x7 round the clock.
 In GSM architecture it is situated between BSC(base station controller)
to MSC(mobile switching centre)

5. DIGITAL TRANSMISSION
PROTOCOLS
(1) PDH(Plesiochronous digital hierarchy)
PDH is former technology used in telecommunications networks to
transport large quantities of data over digital transport equipment via
“FIBRE OPTIC” and “MICROWAVE RADIO SYSTEMS”.
PDH allows transmission of data streams that are nominally running at
the same rate, but allowing some variation on the speed around a
nominal rate.
There is no link between watches to guarantee they run at exactly the
same rate

6. (2) SDH(Synchronous Digital Hierarchy) OR SONET(Synchronous Optical
Networking)
SDH is successor of PDH, uses TDMA for constant stream of
information , it uses optical fibre, microwave radio and electric interface
(RJ45 Ethernet radio).
This method was adopted to send large amounts of telephone calls
and data traffic over the same fibre without synchronization problems.
The STM-1(Synchronous Transport Module level-1) frame is the basic
transmission format for SDH.

7. Network management
system(NMS)
Architecture of system
NMS
Switch
EMS EMS EMS………………

8. NMS(Network Management System): It provides an integrated system for
sharing device information(nodes) across management applications,
automation of device management tasks.
There are three NMSs in NSN.
 (1)ECI Telecom: SDH
 (2)Huawei: SDH and Ethernet radio
 (3)NEC: Ethernet Radio

9. EMS(element management system): It is capable of scaling as the
network grows, maintaining high performance levels as the number of
network events increase, and providing simplified integration with
third-party systems. It meets the service provider's expectations for
integrated operational support systems.
EMS function is divided into 5 key areas i.e. fault, configuration,
accounting, performance and security
There are total 8 servers in the system, 7 for EMS allocated according
to equipment and 1 for NMS.
CISCO’s switches provide soft switching operations.

10. MAJOR APPLICATIONS OF
NMS
Service trail creation
Uploading and removal of node
Alarm watching and handling
Creation and restoration of all the configuration detail of network
Traffic shifting
Clock synchronization
Swapping of node
USDM uploading

11. Home screen of ECI Telecom’s
NMS

12.  Both the NMS are based on LINUX environment
 Attached directly with the system servers via SNMP(Simple Network
Management Protocol)
 They require third-party client to get logged in within the system and
supporting package managers
 Huawei uses its own iManager 2000
 ECI uses GOGlobal third party client and SmartLight package manager

13. Huawei’s NMS
 Cost is less.
-Chinese firm
 Integrated
- Compatible with RTN series(910 and 950) equipment.
- Works on both types of channel Optical fiber and Radiolink.
 Easy to configure with hardware and servers.
- Huawei has own set of hardware.
 Service support is very good
 Advanced features

14. ADVANCED FEATURES
 3 link creation
 4Tunnel service creation
 Ethernet over SDH(EOS) path creation

15.  Simple node creation and deletion: When new BST unit takes place or
to be uploaded virtually on the entire network.

17.  2 node configuration: After node uploading it is required to configure
with nearly available existing node

18.  We can assign as per the requirement and availability
- Frequency(IF), Modulation technique, Bit rate, Tx Power, channel
bandwidth, protection path
- At last we have to synchronize with real time clock.
- Flexible to configure according to type of services.
- Here advanced feature of 3-link configuration is available to expand
services and bandwidth.

19.  4 tunnel creation:
a tunneling protocol allows a network user to access or provide a
network service that the underlying network does not support or
provide directly.
 Here the service provider is a user to take advantage of foreign
protocol over existing protocols(SDH, SONET and PDH) for betterment
of services offering to subscribers.

20. Here we had created 4tunnel service to enable Multiprotocol Label
Switching (MPLS) to avoid conventional routing table and provide fast
telecommunication network.

21. Enable PWE service using 4tunnelin: pseudo-wire (PWE) is an emulation
of a point-to-point connection over a packet-switching network (PSN).
Here we enabled 3g via circuit emulation service(CES).

22. ETHERNET IN TELECOM
 Carrier Ethernet (ETH) is useful in telecommunications network
providers to provide Ethernet services to customers and to utilize
Ethernet technology in their networks.
Important terms:
- CIR: Committed information rate, the average bandwidth for a virtual
circuit
- PIR: Peak Information rate
- EIR: Excessive information rate
- PIR= CIR + EIR
These data is required to enable and control Data pack over ETH

23. tightVNC FOR
CONFIGURATION
 TightVNC is a cross-platform free and open-source remote desktop
software application that uses and extends the RFB protocol of Virtual
Network Computing (VNC) to control another computer's screen
remotely
 RFB( Remote Frame Buffer) is the protocol to use and control remote
computer using GUI.
 It is most preferable VNC platform for Windows operated computer to
work on server level administration.

24. CONCLUSION
 learnt different parameters, protocols, tools, architecture being used
in recent telecom industry from the scratch. I started with fundamentals
of telecom protocols and architecture subsequently became familiar
with major tools.
 Designed various services operating live GSM network as well as
bootstrapped the problems maintaining those services properly using
different applications.