Summary: A SURVEY OF SCHEDULING THEORY IN
WIRELESS DATA NETWORKS
MATTHEW ANDREWS #
Abstract. We survey some results for scheduling data in wireless data systems such as 1xEVDO.
An important feature of such systems is that the channel rates between the basestation and the mobile
users are both userdependent and timevarying. The wireless data scheduling problem has recently
received a great deal of attention in the literature. However, comparisons of results are sometimes
difficult due to the fact that many different models have been studied. In this survey we describe some
of the models that have been proposed and analyze the performance of different scheduling algorithms
within these models.
1. Introduction. The advent of thirdgeneration wireless systems such as
CDMA2000 1xEVDO [15, 18] means that mobile Internet users can now obtain
high data rates in cellular systems. However, in order to effectively utilize the
wireless capacity, we require efficient methods for deciding how the wireless re
sources should be assigned. In particular, we require scheduling algorithms that
determine which user should be served in each time step.
In this paper we survey some of the basic results about scheduling in wireless
data systems. The most important feature of such systems is that due to channel
fading and user mobility, the rates at which users can receive data are both user
dependent and timevarying. In particular, when a user is close to the transmitter