qos systems in uganda
DESCRIPTION
ITU Regional Standardization Forum for Africa (Kampala, Uganda, 23-25 June 2014). QoS systems in Uganda. Echeda Robert, Compliance Specialist, Uganda Communications Commission [email protected]. Uganda Communications Commission. - PowerPoint PPT PresentationTRANSCRIPT
Kampala, Uganda, 23 June 2014
QoS systems in Uganda
Echeda Robert,Compliance Specialist,
Uganda Communications Commission
ITU Regional Standardization Forum for Africa
(Kampala, Uganda, 23-25 June 2014)
Uganda Communications Commission
Uganda Communications Commission (UCC) established by the Communications act 2007 (which was revised in 2013) as the regulator of the Communications Sector in Uganda. Its core mandate is to promote the interests of consumers and operators as regards the quality of communications services and equipment.
UCC has licensed 6 PLMN networks, 5 ISP, 2 fiber cable operators, 3 Mast operators and 3 technical service providers each operator is required to ensure services meet the basic QoS standards.
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QoS legal Framework
The Communications actQoS regulationsLicense requirementThe Name and Shame Policy
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Mandate of UCC
to set national standards and ensure compliance with national and international standards and obligations laid down by international communication agreements and treaties to which Uganda is a party.promote and safeguard the interests of consumers and operators as regards the quality of communications services and equipment.establish an intelligent network monitoring system to monitor traffic, revenue and quality of service of operators
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Roles of UCC
Establish Quality of Service Framework.QoS assurance through periodic monitoring and
evaluation.Adopt internationally inter-operative standardsEstablish equipment type approval regulationsCarry out and certify Type approval of epment.Manage scare resourceEstablish and maintain a mutually conducive
environment for operators, the public and authoritiesPromote consumer awareness through public
dialogues and stakeholder workshops.
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Roles of service providers
Operators to provide services that meet the minimum requirements of QoS standard.Establish Monitoring system, customer support centers and
proactively address consumer complaints.Ensure redundancy of network infrastructureEnsure use of type approved equipmentEnsure optimum usage of authorized scare resource through
use of efficient technologies.Establish open standard interoperable points of interconnect
and share resources where technically feasible.Ensure integrity of network systems and protect consumer’s
privacy or confidentiality of information.
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Consumers
Buy Type approved terminalsEnsure proper use of servicesensure to Use services of licensed operatorsDemand and Pay for services usedUse the right channels for ComplainsMay resort to UCC for arbitration
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QoS Monitoring system
Drive tests along routes of high traffic in towns with the highest traffic.Auto generation of calls from Mobile unit, the call profile is: setup time out of 12s, duration of 60s and a call window of 90s based on common usage patterns.Parameters monitored Call success rate, Dropped
call rate, Blocked call rate, call setup success rate.Data collected in the 10 major towns
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Monitoring Ctn
Other statistics submitted by operators include network outage stats, Consumer Compliant reports and network performance statistics.
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Parameters
Congestion: Probability of not accessing a traffic Channel- TCH congestion – (0.5%)Call Drop Rate: Percentage number of calls that are dropped after connection to the system or Network during the call duration - (<2%) Call Block Rate: Percentage number of calls that are blocked after call set up - (<2%)Percentage of good quality calls: the percentage of Good calls made within the hour – (>95%) Success call rate: Success call is one which terminates with ‘no’ answer’ on voice mail service, announcement that subscriber is not available, with a busy signal, with an announcement that wrong number has been dialled, and in conversation – (>99% )Network Availability: time that the network resources Are available to the consume, >95% for MSCs and BSS And >95% for BTS
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Evaluation and enforcement
Following conclusion of monitoring, the major cause and areas of failure are identified through a consultative forum with respective operator and remedial action plan developed. The comparative performance of the operators are published in public media.
The remedial plan is periodically monitored for effectiveness and potential impact to QoS performance. The UCC may institute other measures of enforcement like penalities for repeated failure to achieve minimum targets.
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QoS Eco system
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Inter relations of different views of QoS
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Relationship between QoS and NP
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QoS criteria
Non network related
QoS criteria
Network related
QoS criteria
Mapping
Network performance
parameters
Target - range
or limit
Parameter 1
Parameter 2
Parameter N
xxxx
yyyy
zzzz
Methodology for Mapping QoS to Network performance
The user's QoS requirements is the starting point. This is mapped to QoS offered parameters by the service provider. These are mapped to network and non-network related performance parameters. The network related parameters are mapped into NP parameters and target values are assigned. A set of monitoring systems keeps track of the desired performance. The achieved end-to-end QoS performance is derived from the measurements and combined with the non network related QoS.
QoS performance is compared with the users/customer's QoS perceived and Corrective action is taken to address the difference.
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Mapping QoS to Network performance
The achieved QoS is the end-to-end QoS performance is derived from measurements.users/customer's QoS perceived is obtained from customer surveys, consultative workshops and could be indicated by number of complaints.Corrective action is taken to resolve difference between QoS Perceived and QoS achieved.
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Relationship btn QoS and NP
An example of mapping of QoS into NP is shown below:
- QoS requirement for telephony: not more than x % of connections made to experience difficulty on the clarity of conversation;- the NP requirements are the parameters identified as
contributing to call clarity: transmission loss, noise (impulsive and non impulsive), echo, delay, crosstalk, voice clipping, (and possibly others);end-to-end target values for each parameter may be
specified. The sum effect should result in not more than x % of calls experiencing difficulty in call clarity.
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Challenges
Correlating QoS targets to consumer perceptionCorrelating QoS achieved to QoS perceived by the consumer.Correlating QoS perception to network performance.Establishing the cause of failure and determine the appropriate remedial action.Addressing thefts, vandalism, unstable power and delays in issuing way leaves.
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Conclusion
Uganda has established technical and legal mechanisms for monitoring and enforcement of QoS to ensure consumer’s interests are addressed.Monitoring is designed to benchmark respective operator performance against set target and identify major cause and areas of failure for remedial action.Over the years as subscriber numbers grow and services are unified on one platform there is a growing need for proactive monitoring of end to end performance facilitated by methodology of relating QoS performance target to performance target of network requirements for the service.
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RECCOMENDATION
A standard Guideline to correlate QoS performance targets to performance targets of the network requirements for the service.
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TO BE CONTINUED
ITUT SG12 AFR
Kampala, Uganda, 23 June 2014