Performance management of IP based wireless networks
IP transport layer in wireless networks | |
Management challenges | |
IP Management of the IP transport layer | |
Examples |
IP transport in wireless networks
Application vs. transport layer QoS
QoS is based on IETF Differentiated Services model | ||
Application mix | ||
user traffic (voice, streaming media, interactive data, bulk data) | ||
signaling (time critical, non real-time) | ||
O&M (time critical, non real-time) | ||
All of these are mapped to services of the transport layer. | ||
Management tasks | ||
monitoring service quality | ||
optimal provisioning of network resources | ||
consistent deployment of DiffServ configurations |
Network characteristics - size
Large number of routers | ||
5 - 10 000 routers in a RAN | ||
2-year rollout plan means appr. 10 routers to deploy each day! | ||
Dynamics of configuration changes | ||
numerous new types of wireless applications expected | ||
continuously evolving knowledge about traffic characteristics | ||
frequent planning, re-optimization is necessary to maintain resource efficiency |
Network characteristics - reliability
Reliable services | ||
high standards of telecom: strict reliability requirements | ||
services are offered when only a fraction of the network is deployed | ||
expansions and reconfigurations must be done on an already operational network | ||
Requirements on the IP management system
Support complex management operations … | |
in a very large and dynamically changing network … | |
while the reliability of the services is maintained. |
Separation of tasks | |||
sophisticated modeling tool | |||
planning, optimization, and analysis functions | |||
complex tasks in a low risk environment (simulator) | |||
algorithms help handling large networks | |||
online management application | |||
configuration, monitoring, trouble shooting | |||
consistency checks guard network operations | |||
import complex configuration sets generated by algorithms from modeling tool | |||
Tools integrated through network database | |||
shared information and network data model | |||
based on standards (e.g. DEN/CIM specs of DMTF) |
Routing analysis and evaluation | |||
simulate routing behavior | |||
consistency and connectivity analysis | |||
MPLS traffic engineering | |||
simulate CSPF | |||
local and global LSP optimization | |||
Performance evaluation | |||
service characteristics for each DiffServ class | |||
loss and delay calculation | |||
Network planning and optimization | |||
topology planning | |||
link dimensioning | |||
routing/addressing plan | |||
Analyze and design large and complex networks |
Transport network re-configuration
Integration in the management system
Providing quality of service in the large, dynamically changing IP transport network is a key issue. | |
A modeling, simulation and planning tool is required to manage and optimize the performance. | |
Smooth workflow between other planning and simulation tools and management applications is crucial. |