NDLI: Throughput-delay scaling in wireless networks with constant-size packets

Content Provider	IEEE Xplore Digital Library
Author	El Gamal, A. Mammen, J. Prabhakar, B. Shah, D.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. Eng. & Comput. Sci., Stanford Univ., CA (El Gamal, A.; Mammen, J.; Prabhakar, B.; Shah, D.)
Abstract	In previous work (2004), we characterized the optimal throughput-delay trade-off in static wireless networks as D(n) = Theta(nT(n)), where D(n) and T(n) are the average packet delay and throughput in a network of n nodes, respectively. While this trade-off captured the essential network dynamics, packets needed to scale down with the network size. In this "fluid model", no buffers were required. Due to this packet scaling, D(n) did not correspond to the average delay per bit. That led to the question whether the trade-off remains the same when the packet size is kept constant, which necessitates buffers and packet scheduling in the network. In this paper, we answer this question in the affirmative by showing that the optimal throughput-delay trade-off is still D(n) = Theta(nT(n)), where now D(n) is the average delay per bit. Packets of constant size necessitate the use of buffers in the network, which in turn requires scheduling packet transmissions in a discrete-time queueing network and analyzing the corresponding delay. Our method consists of deriving packet schedules in the discrete-time network by looking at a corresponding continuous-time network and then analyzing the delay induced in the actual discrete network using results from queueing theory for continuous-time networks
Starting Page	1329
Ending Page	1333
File Size	219083
Page Count	5
File Format	PDF
ISBN	0780391519
DOI	10.1109/ISIT.2005.1523558
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-04
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Intelligent networks Wireless networks Delay Throughput Scheduling algorithm Queueing analysis Routing
Content Type	Text
Resource Type	Article

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