business id. 0631056-0© nethawk 2002. all rights reserved. confidential april 2005nethawk nethawk...
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![Page 1: Business Id. 0631056-0© NetHawk 2002. All rights reserved. Confidential April 2005NetHawk NetHawk Quality of Service products Markus Ahokangas, MSc Product](https://reader035.vdocument.in/reader035/viewer/2022070402/56649f225503460f94c3ad75/html5/thumbnails/1.jpg)
April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
NetHawk Quality of Service products
Markus Ahokangas, MSc
Product Manager
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Quality of Service –mittaukset verkkoanalysaattorilla
> Call and Session Analysis
> Quality of Service (QoS)
> Radio Optimization Measurement
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Call and Session Analysis
> Call and Session establishment failures in
– multi-manufacturer Iu-CS an Iu-PS interfaces
– manufacturer specific Iub interface
> Calls and Sessions dropping during active phase, why?
– Malfunctioning UE
– Admisson control in RNC
– Handover control in RNC/UE
– Power control in RNC/UE
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Call and Session trace
Dropped CS calls and PS session can be filtered out from huge signalling load to be further analysed
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Call and Session trace
> Different kinds of Handover (HO) cases in UTRAN
– 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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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Call and Session trace
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
> 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
Call and Session trace
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Call and Session trace
> HO cases are expressed when they happen:– 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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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Call and Session traceKey Performance Indicators
> Statistical information illustrates the most important parameters affecting the network performance e.g.
– Call/session drop rate,
– Handover success rates,
– Cause distribution,
– etc.
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Quality of Service (QoS)
> Which network elements is a “bottleneck” in PS operation?
> How to guarantee satisfying QoS for the subscribers?
> Is the network fulfilling QoS requirements defined by 3GPP?
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Quality of Service (QoS)
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Quality of Service (QoS)
> Enables measurements for U-Plane traffic
– Delay, average delay, delay variance
– 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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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Quality of Service (QoS)
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
WCDMA analysis challenges
> In WCDMA UEs are simultaneously on the same frequency band causing:– Cell breathing, – Near-far effect and – Interference.
> New parameters and analysis methods are needed for troubleshooting:– 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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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
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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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
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,– Interference,– Power control and – DL/UL balancing.
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
ROM user interface
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
ROM parameters
> Cell related parameters:– Received total wideband power, – 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, – Round Trip Time
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
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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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
The most effective tool for NodeB
> HSDPA functional testing and demonstrations
> Production testing
> Conformance testing
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Challenges with UMTS Networks
> How to build network for NodeB testing?
> 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?
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Test NodeB or UE with BER
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Test HSDPA Layer 1
RNC/Iub Simulator WCDMA NodeB Test mobile
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
Virtual IubTM to develop Test Cases without NodeB
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
NodeB Conformance Testing
E1
CMU300
IubRF
10MHz
RNC/Iub Simulator
WCDMA/FDD NodeB
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April 2005 NetHawkBusiness Id. 0631056-0 © NetHawk 2002. All rights reserved.
Confidential
> 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
– Solution for HSDPA L1 functional testing
– NodeB production test platform