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P155
It is important to recognise when the speed is limited by maximum speed of the subscription rather than the network performance. The network may for example be technically able to deliver a bit rate higher than the purchased subscription, and it’s also possible that the speed is throttled to a very low value after reaching the end user’s data cap.
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P160
The aim of this section is to discuss approaches for the measurement client to gather as much reliable information as possible about the presence of factors in the end user environment which might affect measurement results. Note that standalone software/applications are best placed to be able to perform this metadata retrieval functions e.g. apps provided for mobile terminals.
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P161
Hardware remote management protocols like TR-064[7]can be used to discover modem router specifications and status and the subscription information the ISP might have provisioned to the modem.
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P162
Application programming interfaces (APIs) which are developed and distributed by different software manufacturers (Java[8], Microsoft[9], Google[10], Apple[11]…) should be used for programming measurement clients in order to retrieve the metadata. It is worth mentioning that different operating systems may give measurement clients different access for end user environment based factors.
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P163
When collecting this information, privacy aspects must also be taken into account. Certain information may constitute personal data as defined in Regulation (EU) 2016/679 and the consent of the end user is required.
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P164
NRAs should retrieve and store all relevant measurement results and associated environmental information to enable analysis of the effect of end user environmental factors upon the measurement results, to allow a better assessment of results.
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P166
This chapter provides recommendations for validation of the collected measurement results. This chapter also provides recommendations on how the speed measurement results should be assessed in comparison to the contractual speed values for end users. Guidance is also given on the number and distribution of the individual measurements.
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P167
Finally, the topic of data aggregation for market level assessment purposes is discussed and guidance on monitoring the general IAS quality (IAS as a whole and effect of specialised services on IAS) as well as individual applications using IAS is provided.
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P168
In assessing cross-border measurements it is important to understand how the server location can impact the measurement results. It is evident that delay increases with the number of network hops, and that connectivity may be affected by crossing multiple network borders. Ultimately the measured quality is dependent on transmission delay, all the links between the measurement client and server and also the measurement server’s capacity. While these factors should always be taken into account, this is particularly the case when performing cross-border measurements.
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P169
The measurement tool generates a data set for each measurement period that is stored in a database. Depending on the kind of measurement approach chosen, the data validation is likely to be complex and extensive. There are two basic measurement approaches:
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