1. 1 IEX8175 RF Electronics Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo.ots@ttu.ee

2. 2 Hierarchical QoS Customer # 1 VLAN VoIP VideoConf VideoStream Data p1 Internet Data p2 Cust 1 Cust 2 Cust 3 Cust 4 Cust n MPLS VPN Internet GigE 10 GigE MPLS Tunnel

3. 3 Uni- and Bi-directional A CE BF D Uni-directional Ring (1 fiber) C-A A-C A CE BF D Bi-directional Ring (2 fibers) C-A A-C

4. 4 Kiudoptika & DWDM Wavelengths can be time- division multiplexed into a series of aggregated connections Sets of wavelengths can be spaced into wavebands Switching can be done by wavebands or wavelengths 1 Cable can do multi terabits/sec

5. 5 SONET Data Center SONET DWD M Access Long HaulAccessMetro Internet

6. 6 Protocol and Services Internet Access Handle Protocol New Services

7. 7 Traffic & Network Engineering Traffic engineering (TE) –Put the traffic where the bandwidth is –(Sub-)second/minute time scale Network Engineering (NwE) –Put the bandwidth where the traffic is or is soon expected to be –15 minute/hour/day/week time scale Network Planning (NP) –Put the equipment, fibers and bandwidth where the traffic is expected to be [in the future] –Month/quarter/year time scale 0 second minute 15 min hour day month quarter year Traffic Engineering Traffic Engineering week Network Engineering Network Planning

8. 8 Traffic Engineering (TE) The process concerned with optimally routing of signals over existing links in a layer network –More specific: Optimally assigning available bandwidth to requests (to the network) for bandwidth. It is an intra layer network process TE process in each layer network –discovers the links created by network planning and engineering –advertises the links and their bandwidth utilisation –manages (set-up, release, modify) connections in the layer network; i.e. processes incoming calls for native and client connections –restores high grade connections on signal fail [or signal degrade] of the connection It is implemented by the Sub Network Controllers within the layer network

9. 9 Network Engineering The process concerned with optimally selecting topology and bandwidth in a layer network, based on –(pro-active) traffic demands expected between any two locations in the network and –(re-active) the actual traffic demand It is an inter layer network process NwE process in each layer network –advertises the nodes and their ports within the layer network –monitors the layer network and determines if/when a new (topological) link should be added or an existing link should be modified or released, based on the network provider's policy –determines best set of connections between ports in the layer network –requests those connections to be set up by its server layer networks; i.e. generates outgoing calls for client connections It is implemented by the (distributed) Network Engineering Controllers (NEC) within the layer network

10. 10 HOVC Link Interfaces - Layer Networks UNI LOVC Link I-NNI PC I-NNI UNI STM-N Physical Interface Component Link HOVC Permanent Connection [non-switched] LOVC VPN #1 LOVC VPN #2 LOVC PN HOVC VPN HOVC PN PN: Public Network VPN: Virtual Private Network

11. 11 Ressursijaotus

12. 12 Links http://www.packetizer.com/voip/ams/papers/ams_project_ description.pdf http://www.brynosaurus.com/pub/net/p2pnat/ http://www.ietf.org/rfc/rfc1700.txt?number=1700 http://www.juniper.net/ http://www.juniper.net/solutions/literature/white_p apers/200161.pdf