NetHawk Quality of Service products

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Markus Ahokangas, MSc
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Call and Session Analysis
Quality of Service (QoS)
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multi-manufacturer Iu-CS an Iu-PS interfaces
manufacturer specific Iub interface
Malfunctioning UE
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Call and Session trace
Dropped CS calls and PS session can be filtered out from huge signalling load to be further analysed
Business Id. 0631056-0 © NetHawk 2002. All rights reserved.
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Soft, Softer, Hard (Intra/Inter frequency) and Inter-system
Well working HO control function in RNC must be verified to:
minimize the number of dropped calls
guarantee economical radio resource utilization
avoid ping-pong effects
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Call and Session trace
NetHawk Iub Call Trace enables to find all the different HO cases
Dynamic Iub feature enables analyser to find the new connections (VPI/VCI/CID) being allocated for CS calls and PS session during HO procedure
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different HO types separated
calls with different active set sizes separated
Failed HO can be opened in monitoring window for detailed analysis
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Call/session drop rate,
Handover success rates,
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How to guarantee satisfying QoS for the subscribers?
Is the network fulfilling QoS requirements defined by 3GPP?
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Throughput for IP, UDP, TCP (resendings)
Measurement for all traffic in interface or for a single subscriber (co-operation with Call Trace)
Several simultaneous measurements
The results exportable to be further analysed (e.g. with MS-Excel)
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WCDMA analysis challenges
In WCDMA UEs are simultaneously on the same frequency band causing:
Cell breathing,
Parameter correlation not clearly known yet.
Power control functionality in RNC and UEs need to be tested.
UL/DL parameter merging.
Therefore, how to minimize the number of dropped calls and maximize the cell capacity?
And how to easily access, analyse and visualize the key parameters?
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NetHawk solution for radio analysis
The key parameters and indicators for WCDMA air interface quality are available in the Iub interface between NodeB and RNC.
With the NetHawk 3G Analyser these parameters can effectively be monitored, calculated and analysed.
NetHawk 3G Analyser
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ROM option in the NetHawk 3G Analyser
Radio Optimization Measurement (ROM) is a tool for radio interface optimization and troubleshooting.
ROM provides graphical view to the key UE and cell level parameters.
With the help of view to the signalling levels, error rates and power values within the monitored area, you can investigate:
Radio interface quality,
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Transmitted carrier power.
UE dedicated parameters:
BLER (Block Error rate), BER (Bit Error Rate), FER (Frame Error Rate),
SIR Target, SIR Value, SIR Error Value,
Transmitted code power value,
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Conclusions
Efficient QoS analysis and troubleshooting with the NetHawk 3G Analyser.
Call trace application enables solving subscriber related problems, HO problems and statistical analysis
QoS application provides illustrative view to throughput and point-to-point delay related parameters in your network.
ROM application provides view to the key radio interface parameters collected from Iub interface.
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> HSDPA functional testing and demonstrations
> Production testing
> Conformance testing
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How to test HSDPA implementation in the NodeB?
How to verify the NodeB transmitter and receiver characteristics?
How to perform acceptance tests for new mobile phone models
How to demonstrate the new features of the product?
How to minimize the number of faulty NodeBs coming out from the factory?
UMTS brings new challenges to NodeB manufactures and operators.
The questions listed can be used as a starting
point of discussion to find out the critical business issues of customers.
Please update them according to the customer.
HSDPA = High Speed Downlink Packet Access
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Test NodeB or UE with BER
You can test NodeB or UE over the Iub and Uu interfaces using the BER Tester
generates, sends and receives bit patterns
Calculates BER and stores BER, BLER and FER
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RNC/Iub Simulator
WCDMA NodeB
Test mobile
The RNC/Iub Simulator supports HS-DSCH FP and HSDPA specific NBAP commands of Release 5.
You can setup HS-DSCH channel with parameters from the example script.
The BER Tester of the Simulator can be used to send PN9 sequence to the downlink direction into the HS-DSCH channel.
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Virtual IubTM to develop Test Cases without NodeB
The Virtual Iub allows you to run RNC/Iub Simulator against NodeB/Iub Simulator in one PC without NetHawk adapters. The Virtual Iub environment increases the productivity of the test case development.
NetHawk itself uses Virtual Iub in all Iub Simulator development.
Virtual Iub is a NetHawk trademark.
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RNC/Iub Simulator
WCDMA/FDD NodeB
RNC/Iub Simulator includes 3GPP 25.141 based Test Models (TM) and Reference Measurement Channels (RMC) library. The library is available for Ericsson NodeBs with Rel99 NBAP.
The library includes a fully automatic script which can can setup TM1 with 16 DPCHs, TM2, TM2 with 16 DPCHs, TM4 and RMC 12,2kbps.
The library is used R&F measurement equipment (like R&S CMU300) for testing transmitter and receiver characteristics of the NodeB.
DPCH = Dedicated Physical Channel
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NetHawk RNC/Iub Simulator extends your PC into a telecommunication tester that simulates protocols in Iub interface and points out user plane problems
The solution for functional NodeB testing to reduce
effort and to increase quality:
Unique portable RNC
NodeB production test platform

NetHawk Quality of Service products

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