How to Implement MIMO Routing in NS2
To implement the MIMO (Multiple Input Multiple Output) routing within NS2 (Network Simulator 2), we will require follow this common steps that contain changing the NS2 code or incorporating a MIMO routing protocol, which can be supported several antennas at both the transmitter and receiver sides. We present an outline of how we can attain it:
Step-by-Step Implementation:
- Setup NS2
Make sure NS2 installed on the machine. We can download and install NS2 from its official repository or related sites.
- We can use the command to install NS2 on Ubuntu:
sudo apt-get install ns2
- Check the installation by running a simple simulation instance.
- Understand MIMO Routing Protocols
MIMO routing is typically portion of the specialized protocols for wireless networks, aiming on enhancing the performance of communication by using several antennas. This protocols, which we would deliberate for MIMO routing contain:
- MIMO-Aware Ad-hoc Routing Protocol (MAODV)
- Cooperative MIMO (CMIMO)
- MIMO-based routing extensions to existing protocols like AODV or DSR
If such protocols are not obtainable, we want to change the existing routing protocols such as AODV, DSR to support MIMO capabilities by appending the channel models and antenna within NS2.
- Modify Physical and MAC Layer for MIMO Support
MIMO routing protocol controls at both the physical layers and MAC layers. In the simulation environment NS2, we will require to append or alter the MIMO features to these layers:
- Physical Layer: Alter the physical layer is to support several antennas that can be completed by improving the propagation models as well as link models within NS2 to account for the MIMO signal processing.
- Update phy.cc and phy.h files in the simulation NS2 to contain MIMO-particular calculations.
- MAC Layer: Also, we will require to modify the MAC layer, as MIMO routing protocols normally want various MAC behaviour. For example, expanding the 802.11 MAC layer to manage numerous antennas.
- Change the mac-802_11.cc to contain MIMO-specific enhancements like spatial multiplexing or diversity schemes.
- Update Routing Protocol for MIMO
The next step is contains expanding the routing protocol to get benefit of the MIMO then we can be expanded the AODV or DSR by altering their respective .cc and .h files:
- AODV Example: Append the MIMO-aware routing protocols in aodv.cc and aodv.h. We can be launched the MIMO channel conditions as part of the route finding method. For specimen, choosing the routes according to the link capacity instead of simply hop count.
- Change the route finding process to deliberate the quality of the MIMO links.
- Incorporate MIMO Propagation Models
- We can use or execute a MIMO propagation model that to replicate the multiple input and output antenna communication. Then, we change or expand the propagation model to mimic the impacts of MIMO transmission, like beamforming or spatial diversity.
- Generally used propagation models such as the TwoRayGround can expand to support the MIMO features.
- Simulation Script in TCL
When the protocol and layers are updated we will require to write a script TCL for the simulation. This TCL script would describe the nodes, these antenna setup, and the changed routing protocol.
Example TCL script snippet:
set ns [new Simulator]
# Define the antenna and MIMO parameters
set node_antenna_1 [new Antenna/MIMO]
$node_antenna_1 setNumAntennas 4
- Run the Simulation
After completing the configuration, we can run the simulation using the NS2 command:
ns your_mimo_simulation.tcl
- Analyse Results
To end, we examine the simulation trace files for the MIMO performance, like throughput, delay, and packet delivery ratio.
Utilize the implementation process that helps to implement the MIMO (Multiple Input Multiple Output) routing and analyse their outcomes in the environment NS2. More details will be offered on this MIMO routing in another manual.
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