Bandwidth Estimation for Admission Control in MANET: Review and Conceptual MANET Admission Control Framework
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Date
2019
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Abstract
Mobile ad-hoc network (MANET) is one of the main technologies
for the next generation wireless networking because of the positive impact it
poses over other wireless networks having undergone rapid progress, which has
inspired many applications. However, providing quality of service (QoS) assurance
to MANET is hard because of the unpredictable nature of the wireless
medium, contention problem amongst the channel, mobility problem and lack of
central co-ordinator. Admission control is therefore seen as one of the methods
for providing QoS. Admission control aim at estimating the network resource
states and decides whether to admit a session without assuring more resources
bandwidth space than what is available to avoid the violation of any rules that
has been previously made. Some recent solution considered the MAC layer
back-off impact due to collision as well as the non-synchronization between the
sender and receiver when estimating the available bandwidth. None of the
previous work proposed a technique that sends a HELLO packet to its one-hop
neighbours which further aggregates to the rest of the nodes to retrieve the
available bandwidth on a carrier sensing region, in order to limit the impact of
additional overhead of the carrier sensing multiple access with collision
avoidance (CSMA/CA). Also, none of the existing solution has properly
addressed the channel idle time dependency between the sending node and the
receiving node by differentiating the BUSY state from the SENSE BUSY states
and the IDLE state caused by an empty queue. This paper, therefore reviews the
bandwidth estimation techniques for admission control for MANET. The
bandwidth estimation techniques for admission control have been categorized
into two: active and passive estimation. An outline of each technique has been
discussed as well as the proposed conceptual framework. The contribution as
identified in this research work is the proposal of conceptual framework that
adapts the following into the bandwidth estimation for admission control in
MANET: (1) HELLO packet advertisement to one hop which further aggregates
to retrieve the available bandwidth on the carrier sensing region, (2) Considering
the channel idle time measurement by differentiating the channel busy state from
channel sensing state and regarding an empty queue as an idle state. Future
research directions are also outlined.
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Keywords
Admission control, Bandwidth, QoS, MANET