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J. Fabini, W. Karner, L. Wallentin, T. Baumgartner:
"The Illusion of Being Deterministic - Application-Level Considerations on Delay in 3G HSPA Networks";
Talk: 8th International IFIP-TC 6 Networking Conference, Aachen, Germany; 05-11-2009 - 05-15-2009; in: "Networking 2009", Springer, Lecture Notes in Computer Sciences, Volume 5550/2009 (2009), ISSN: 0302-9743; 301 - 312.

The delay experienced by mobile applications in HSPA networks depends to a large extent on highly dynamical global context like, e.g., cell load or algorithms and thresholds governing radio resource scheduling, and on local context like, e.g., user-generated load or load history. These complex uncertainty factors are outside of an applications sphere of influence and result in applications perceiving HSPA link behavior as non-deterministic and non-reproducible.
This paper analyzes accurate round-trip and one-way delay measurement
results for three public HSPA networks to demonstrate the high degree of network non-determinism which mobile applications are likely to encounter in practice, particularly significant payload-dependence and
halved delay on slightly increased user-generated link load.We argue that current HSPA radio link schedulers, relying on instantaneous user load as decision criterion for channel capacity allocation, neglect real-time application requirements. Cross-layer optimization is one solution which enables deterministic scheduler decisions based on application requirements.

The delay experienced by mobile applications in HSPA networks depends to a large extent on highly dynamical global context like, e.g., cell load or algorithms and thresholds governing radio resource scheduling, and on local context like, e.g., user-generated load or load history. These complex uncertainty factors are outside of an applications sphere of influence and result in applications perceiving HSPA link behavior as non-deterministic and non-reproducible.
This paper analyzes accurate round-trip and one-way delay measurement
results for three public HSPA networks to demonstrate the high degree of network non-determinism which mobile applications are likely to encounter in practice, particularly significant payload-dependence and
halved delay on slightly increased user-generated link load.We argue that current HSPA radio link schedulers, relying on instantaneous user load as decision criterion for channel capacity allocation, neglect real-time application requirements. Cross-layer optimization is one solution which enables deterministic scheduler decisions based on application requirements.

3G, One-way Delay, HSPA,Measurements, User Experience

http://dx.doi.org/10.1007/978-3-642-01399-7