|
Work item:
|
G.NCAP
|
|
Subject/title:
|
Framework for capacity assessment of packet data services in mobile networks
|
|
Status:
|
[Carried to next study period]
|
|
Approval process:
|
AAP
|
|
Type of work item:
|
Recommendation
|
|
Version:
|
New
|
|
Equivalent number:
|
-
|
|
Timing:
|
-
|
|
Liaison:
|
ETSI TC STQ
|
|
Supporting members:
|
Focus Infocom GmbH,
Opticom GmbH
|
|
Summary:
|
Estimating or validating the capacity of packet-data services is required in many situations, ranging from private-sector issues such as service-level agreements and methods of validating respective commitments, up to regulatory contexts e.g. relating to conditions for licensing of frequency spectrum.
A systematic framework for this task has two components. The first component deals with the spatial element, i.e. definitions allowing measurement data processing towards spatially resolved indicators. The second component are methodologies and metrics for capacity itself.
QoS KPI for mobile networks include an indicator for data rate. However, caution is needed when drawing conclusions from this data rate, which is usually measured through some end to end upload or download scenario, to actual network capacity. For one thing, a single end-user access may be data rate-limited in some way; secondly, today most of the measurement methodologies use http, ie. a TCP-based service, for measurement. In a series of recent work it had been shown by Morton et. al., that TCP may systematically underestimate actual mobile network capacity (which is usually defined in terms of IP layer capacity). If this would just be systematic offset, it could probably be compensated by respective correction factors, but empiric data also show that fluctuation of values is considerably higher as compared to UDP-based measurements. The whole area is currently under intense study.
The framework described in this work item therefore treats the method of measurement, and consequently the usage of results in subsequent processing steps, as a modular, adaptable element.
|
|
Comment:
|
-
|
|
Reference(s):
|
|
|
Historic references:
|
|
Contact(s):
|
|
| ITU-T A.5 justification(s): |
|
|
|
|
First registration in the WP:
2020-04-28 14:51:55
|
|
Last update:
2020-09-22 17:23:13
|
