英語翻譯
Recently,there has been an increased interest in
the subject of wireless ATMw1–8x.The ATM Forum
has established a wireless ATM study group,and
ETSI has standardization activity ongoing for the
physical layer of wireless ATM.There is more than
300 MHz unlicensed spectrum made available in the
US and Europe for wireless access,mainly for the
purpose of accessing the Internet for multimedia
applications.Such applications will require some
kind of wireless packet networking,and wireless
ATM has the potential to fill this need.Wireless
ATM may be attractive due to the simplicity of
switching ATM cells,but the transport of ATM cells
over the air presents certain difficulties.Even if the
packet format over the air is not ATM,the problems
that need to be solved have similarities,and thus an
understanding of these problems is valuable for all
wireless packet networking issues.
This paper is an update of an earlier survey paper
on the subject of wireless ATM written in 1996 w8x,
which studied the subject of ATM cell transport over
the air in detail.Since then,new developments have
taken place,especially in terms of data networking
with ATM.Two important issues in this regard are
various methods to transport the Internet Protocol
\x0eIP.over ATM,and various methods to carry out
hardware switching in Network Layer\x0eLayer 3..We
describe these two in detail in this paper.We also
provide a summary of the physical layer,data link
layer,and multi-access layer issues in wireless ATM.
For more detailed information on these three topics,
as well as other related topics,we refer the reader to [8].
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