Directional Antennas in Mobile Ad Hoc Networks:. MAC and Routing Issues Prepared by: Rima Khalaf Behnam Rezaei. Based on the work of:. N. Vaidya, Y.b. Ko, and V. Shankarkumar, Texas A&M University; “Medium Access Control Protocols for Directional Antennas in Ad Hoc Networks”
MAC and Routing Issues
A B C xD E
A B C D xE
(D & E in the above scenarios cannot send OCTS if anyone sends them a DRTS because one of their antennas is blocked)
A B- -> C D E
A possible scenario of collisions with DRTS packets
Throughput in Kb/s
PDR and throughput of the network in the mobility scenario (without the physical CS in the IEEE 802.11).
PDRs with and without the physical CS
Effects of the physical CS in mobility scenarios
Mix of omni-directional and directional antennas
BER based(with DBPSK modulation)
TX power (directional)
RX threshold (RXT)
CS threshold (CST)
AOA cache expiration time
Table 1: Set of parameters used in the simulation.Performance Cntd.
: PDR and throughput of the network in the no mobility scenario (without the physical CS in the IEEE 802.11).
Set of parameters used in the simulation
Comparisons, Performance Tradeoffs, Proposed modifications, and conclusions …