Information Technology Reference
In-Depth Information
Classification by Architecture
this creates the need to enable data access
and update to occur simultaneously and to
avoid contention through the application of
advanced synchronization techniques.
Communications Bandwidth: Wireless
grids can harness the power of wireless
technology to allow remote access. At the
same time, the grid infrastructure should
be robust enough to ensure high Quality of
Service (QoS).
Multiplicity of Applications: Wireless
Grids should allow the users ubiquitous
access to a wide variety of applications.
However, one needs to overcome the need
to install these applications on separate
mobile devices.
One way to characterize the architecture of the
wireless grid is by the degree of heterogeneity
of the actual devices and the level of control
exercised by those who own and administer the
devices (figure 1). It can vary from a simple net-
work of homogeneous devices bound by a single
set of policies and rules to a complex network
of heterogeneous devices spread across multiple
organizational, political and geographical bound-
aries, as categorized below:
Local Cluster or Homogeneous Wireless
Grid: This simplest form involves a local
collection of identical or similar wireless
devices that share the same hardware ar-
chitecture and the same operating systems.
Because of the homogeneity of the end
systems, the integration of these devices
into the wireless grid, as well as the conse-
quent sharing of resources, becomes a
much easier task. Today, this type of orga-
nization is more likely to be found in a
single division of an organization where
one single administrative body exercises
control over all the devices. An example
GRID LAYOUT
Drawing upon the paradigm of the wired grids
(Gentzsch, 2001; Ong, 2003 and Tiang, 2003),
various layouts of the wireless grids are possible.
The classification schemes can be based on the
architecture or on the function of the grids.
Figure 1. A simplified depiction of the 3-tier wireless Grid architecture (adapted from Ong, 2003)
Search WWH ::




Custom Search