@inproceedings{92506da5e7fb4d0296318c934f3f502b,
title = "Layering as optimization decomposition: Current status and open issues",
abstract = "Network protocols in layered architectures have historically been obtained on an ad-hoc basis, and much of the recent cross-layer designs are conducted through piecemeal approaches. Network protocols may instead be holistically analyzed and systematically designed as distributed solutions to some global optimization problems in the form of generalized Network Utility Maximization (NUM), providing insight on what they optimize and structures of the network protocol stack. This paper presents a short survey of the recent efforts towards a systematic understanding of {"}layering{"} as {"}optimization decomposition{"}, where the overall communication network is modeled by a generalized NUM problem, each layer corresponds to a decomposed subproblem, and the interfaces among layers are quantified as functions of the optimization variables coordinating the subproblems. Furthermore, there are many alternative decompositions, each leading to a different layering architecture. Industry adoption of this unifying framework has also started. Here we summarize the current status of horizontal decomposition into distributed computation and vertical decomposition into functional modules such as congestion control, routing, scheduling, random access, power control, and coding. Key messages and methodologies arising out of many recent work are listed. Then we present a list of challenging open issues in this area and the initial progress made on some of them.",
keywords = "Adaptive coding, Congestion control, Cross-layer design, Distributed algorithm, Lagrange duality, MAC, Network utility maximization, Optimization, Power control, Reverse engineering, Routing, Scheduling, Stochastic control, TCP/IP, Wireless ad hoc networks",
author = "Mung Chiang and Low, {Steven H.} and Calderbank, {A. Robert} and Doyle, {John C.}",
year = "2006",
month = jan,
day = "1",
doi = "10.1109/CISS.2006.286492",
language = "English (US)",
isbn = "1424403502",
series = "2006 IEEE Conference on Information Sciences and Systems, CISS 2006 - Proceedings",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "355--362",
booktitle = "2006 IEEE Conference on Information Sciences and Systems, CISS 2006 - Proceedings",
address = "United States",
note = "2006 40th Annual Conference on Information Sciences and Systems, CISS 2006 ; Conference date: 22-03-2006 Through 24-03-2006",
}