Radio System Modelling

The Roke Radio System Simulation Environment provides comprehensive statistical analysis of network performance and the impact of different coexistence scenarios.

A current trend within the spectrum regulatory regime is towards a more market driven and technology-neutral approach. This provides network operators with greater flexibility and an increasingly wide choice of competing radio technologies, deployment options and service offerings. This is likely to lead to a more dynamic radio environment as secondary spectrum trading and re-farming becomes more widespread.

Introducing the Roke Radio System Simulation Environment

In order to make informed decisions on how best to utilise the available spectrum resource it is essential to understand how different systems operate and interact at the network level. This has a significant impact on system capacity and network performance and can impose deployment restrictions.

The Radio System Simulation Environment, coupled with our radio spectrum consultancy service, is capable of investigating these issues. We specialise in working with our customers to rapidly configure and customise simulations to target specific requirements. The Roke Radio System Simulation Environment has been used, for example, to optimise the VOIP scheduling algorithm for a leading European operator.

Benefits

The Radio System Simulation Environment can be used by operators and equipment vendors to enable fine tuning of algorithms to optimise network efficiency. The list below outlines the features and scenarios the environment is able to support.

Feature Support

• Support for TDMA, CDMA and OFDMA systems (with ‘Wraparound’ interference model)
• Support for FDD and TDD systems
• MIMO and diversity configurations
• Dual simulation models; event driven (dynamic) and snapshot (static)
• Support for multi-carrier, multi-sector cellular deployments
• Support for fixed link, fixed wireless access and cellular deployments
• Support for mixed services
• User-defined antenna patterns and orientation

Network Scenario Simulation

• Coexistence modelling of multiple networks/links/systems
• Interference analysis – e.g. near far problems and related issues at cell/network boundary
• Network co-existence analysis – e.g. capacity degradation, adjacent channel interference controls/ filter mask etc.
• Traffic model analysis
• Dynamic load control – for example it has been used for Flash – OFDM specifically for handover/load balancing mechanism
• Propagation model analysis – e.g. fast fading, shadow fading and spatial channel model that particularly useful for MIMO applications analysis
• System capacity analysis – e.g. related to dynamic mixed traffic loading scenarios

Algorithm Fine Tuning

• NodeB Scheduling Algorithm
• Dynamic Resources (e.g. carriers/symbols) management algorithm
• Radio Resource Management (RRM) algorithms, e.g. admission control, DCA or packet scheduling
• Power Control – optimisation of NodeB and UE power usages

Capability

Roke has been involved in the standardisation, development and evaluation of cellular systems since the 1980s. We were one of the first companies in the world to build a GSM demonstrator and have played a similar leading role in the development of 3G systems. As a result we have an extensive system simulation capability and have undertaken projects to provide analysis of coexistence, capacity and coverage issues in support of operators, equipment vendors and regulators.

More Information

If you need to obtain performace charactisation data for your radio network or simply want more information about how our consultancy services can assist you then please contact us.