Information Technology Reference
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information. BS
o
in turn broadcasts the request to
all the RSs associated with its VO
o
. If RS
a
locates
the node in its AO
a
then it notifies the BS
o
about
the availability of the node. BS
o
in turn sends the
discover_node response to the requesting RS
o
with the address of N
a
., which is then forwarded
to N
o
. For example, a taxi dispatch service may
be designed to respond to a customer request by
broadcasting messages to all the taxis. These can
be routed through root stations associated with
different localities. An empty taxicab nearest to
the customer location picks up the message and
sends a confirmation back. The same mechanism
can work if the nodes belong to different virtual
organizations. In this case, the request will be
routed to all other base stations by the BS
o
when
it fails to hear back from the RSs in its VO. The
broadcast request to the BS will include informa-
tion about the requested node Na, requesting node
N
o
and the associated RS and the BS. Each BS
will route this request to its own set of RSs. In the
previous example, the customer request is routed
to the taxi service through the customers cellular
provider which connects both the customer and
the taxi service.
VO structure is transparent at all times and that
the process of exchange of is efficient.
VO Creation
Several AOs will come together to form a VO.
An assumption is that a BS will be available to
create a VO with a unique name and address.
Each RS will send an enter_RS message to the
BS with the information about AO such as AO
name, RS name and RS address. In its response,
BS will send the VO information such as the VO
name, BS name and BS address. BS will maintain
a list of all AOs and the associated RS names and
addresses. RS Entry or Exit
It is possible that a new AO can join a VO, or
an existing AO can leave a VO. Any AO can be
associated with multiple VOs at the same time. In
such a scenario, we need to provide a capability
to dynamically configure the RS. Entry mecha-
nism and registration will be the same as the VO
creation. In case an AO is leaving the VO, the RS
will broadcast exit_RS message to the associated
base stations and delete information about the VO.
On receiving the message, the BS will delete the
RS and AO information from its record.
RS Management
BS Management
Business partners can engage in a dynamic rela-
tionship to form a virtual organization (Walton and
Whicker, 1996). This can lead to ad hoc creation
of a VO, dynamic changes to the VO and the
need for resource discovery across several AOs
within a VO. For example, during a disaster event,
several agencies can come together for purposes
of disaster management. In such a situation, one
can envisage a VO being formed between several
agencies to facilitate communication. The rules of
engagement are pre-determined. A central agency
may coordinate activities of several agencies. De-
pending on the requirement, new agencies can be
called upon to deal with the situation. Once their
work is done, these agencies leave. An appropri-
ate RS management protocol can ensure that the
In dynamic markets, two or more virtual organiza-
tions can come together to conduct business. This
will lead to dynamic associations between the VOs
and the need for resource discovery across several
VOs. In the example for disaster management, it is
possible that the concerned agencies are grouped
under different VOs which in turn coordinate with
each other. So a virtual organization can handle the
relief work for people affected. This can include
coordinating food supplies, shelter, and medicine
for the victims through different agencies. Another
virtual organization can deal with the reconstruc-
tion work that involves activities like assessing the
magnitude of damage and managing the process
of repairs. Coordinating activities across multiple
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