ALTO in wireless access networks

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Last updated 2015-04-30 (latest revision 2014-10-27)
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The Application-Layer Traffic Optimization (ALTO) specification defines the concept of Provider-defined Identifiers (PIDs) as the aggregation of network endpoints for network nodes. Each PID can be associated with a set of endpoint addresses, e.g. aggregating endpoints that use the same network access point. This document focuses on mobile networks and introduces proposes the toidea of using use cells of cellular access networks as an aggregation points. This allows applications to make decisions based on the path cost of using the current cell as a network attachment point, or to even choose which network access points network attachment point to select. Use cases are described which can benefit from this. The draft elaborates on possible ALTO modifications enabling such use cases. The intent of the draft is to start discussion on the topic.


Uwe Rauschenbach (

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