Meshdynamics
Wireless For The Outdoor EnterpriseTM    
      Ballon Based Video Surveillance (military)Hastily Formed Networks, Sporting Eventsmilitary defense and public safey with mesh networks, IraqQuad Root Downlink for Temporay and Tactical Networks, Emergency Responsemesh node on solar panel trailer, Australia Mine
Meshdynamics Mesh Networks Scale

Meshdynamics Modular Mesh  family of mesh routers scale. We deliver glitch free, time sensitive, video, voice and sensor streams -- long after competing mesh architectures have run out of steam.

Defense and Homeland Security in US, UK and Canada use Meshdynamics to provide mobile and static video surveillance and perimeter security. These include strategic national borders.

Thousands of nodes are active in surface and underground coal mining sites in Africa, Australia, China, Canada and USA. We provide crucial communications in mining tunnels 64+ hops deep.

This level of scalable performance -- validated by Government Agencies -- remains unmatched.  
 

What makes Meshdynamics So Different ?

 
Inside the box wireless mesh network products use similar -- often identical -- radio hardware. .

Our OEM Extensible, Scalable, Radio Protocol Agnostic, Software set us apart.  Elevator Pitch




      Video Surveillance Mesh NetworksNetworking Construction and Escavating Machinery, Australia MineMine safety and mine communications with Mesh NetworksMeshDynamics Mesh Node in Border Security Patrol CarSingle Radio Edge/Mesh  Node (click for more)

 Scalable, Future-Proof, Wireless Mesh Networking Architectures

Introduction

Mesh network requirements have evolved from their military origins as requirements have moved from the battlefield to the service provider, and enterprise networking environments. Growing demands for Time Sensitive, Video, Voice and M2M streams require packets to be moved over the mesh at high speeds and with low latency and low jitter. Additionally, Outdoor Enterprises require costly cellular links to be efficiently distributed --securely-- over larger areas for mobile machinery.

These challenges in Scalability, Synchronicity and Security are especially relevant to the burgeoning Internet of Things. . 

1. Tree Based Multi-Radio Mesh Architectures Scale.
 
Fig. 1: First, Second and Third Generation Mesh Network Topologies (Architectures).

Three generations of mesh architectures are shown above. Note: First and Second, both use a single radio as backhaul:

First Generation: 1-Radio Ad Hoc Mesh (left). This network uses one radio channel both to service clients and backhaul. This architecture provides the worst of all the options, as expected, since both backhaul and service compete for bandwidth.

Second Generation: Dual-Radio with Single Radio Ad-Hoc meshed backhaul (center). A single radio ad hoc mesh is still servicing the backhaul, packets traveling toward the Internet share bandwidth at each hop along the backhaul path with other interfering mesh backhaul nodes - all-operating on the same channel. "Peer-to-Peer" don't scale. Bandwidth Degradation Graph
 
Third Generation: 3-Radio Meshdynamics Mesh (right). Provides separate backhaul and service functionality and dynamically manages channels of all uplink and downlink radios so that every backhaul (hop) is on non-interfering channels.
 
Meshdynamics scalable multi-radio tree is the wireless equivalent of (Scalable, Self Healing) Switch Stacks  More

2. Conventional Single Channel Backhauls Cannot Scale
 
      

              Fig.2: (left) Competing mesh products suffer from   Bandwidth loss with each hop. Click to Enlarge.
              Fig 3: (right): Meshdynamics MeshControlTM Software engenders Frequency Agility. Click to Enlarge
 

With one backhaul radio available for relaying packets, all nodes communicate with each other on one radio channel. For data to be relayed from mesh node to mesh node, that node must repeat it in a store-and-forward manner. A node first receives the data and then retransmits it. These 2 operations cannot occur simultaneously because, with only a single radio channel, simultaneous transmission and reception would interfere with each other.

This inability - to simultaneously transmit and receive - is a serious disadvantage. If a node cannot send and receive at the same time, it loses of its bandwidth as it attempts to relay packets up and down the backhaul path. A loss of with each hop implies that after 4 hops, a user would be left with (***) = 1/16 of the bandwidth available at the Ethernet link. This is 1/(2N) relationship defines the fraction of the bandwidth available to a user after N hops, see Figure 2. .

3. Managing RF Interference and Jamming Proactively

Switching to another channel contains local interference at one "dirty" section of the network. With one radio backhauls, this is not possible: the entire network is on the same channel and switching to another channel is simply not practical. (Fig 3)

The performance of single channel backhauls is thus heavily compromised in RF polluted environments or under malicious attacks. Military field trials with dual channel backhaul have demonstrated frequency agility, ensuring that the network is active - even with malicious RF interference. Our blue backhaul radios (Fig. 3) simply switch to (scanned) non-interfering channels. More

4. Supporting Both New and Legacy Wireless Radio Protocols

Click for Configuration Options
Meshdynamics' dual channel implementation is not limited to any particular number or type of physical radios, or indeed to the concept of separate physical radios at all. Instead, the Meshdynamics mesh networking algorithms treat multiple physical radios as a pool of available connections. We  work closely with our licensees to support a diverse list of radios: 802.11abg 802.11ac, 802.11ah, Bluetooth, 802.15.4 
 

Future Proofing: Decoupling the logical channel-selection and topology-definition processes from the specific physical radio in this fashion delivers distributed dynamic radio intelligence benefits for current as well as emerging radio standards.

This substantially decreases time to market and better manufacturing scale, reducing both development- and unit cost over custom development for our OEM software licensees.
  Sharp QCX-300 Example

5. Modular Multi-Radio Design Securely connects Edge Devices

Modular MeshTM products take our radio agnostic, Radio Frequency (RF) Agility one step further. The "RF robot" software runs at a radio-abstracted layer: the same mesh control supports radios operating on different frequencies and protocols.

Fig. 4 shows how this level of flexibility is leveraged in the MD4000 Modular Mesh Products. There are 4 mini-PCI slots on the board, two on the bottom and two on top. Each of the four slots can house a different frequency radio. This opens up some interesting possibilities including 2.4 GHz backhaul sub tree being part of a mesh tree  with 5.8 GHz backhauls.
 
Fig 4:  Configurable Board supports up to 4 radios      Fig 5: Interoperability between 5 GHz and 2.4 GHz sub trees

Since the service and backhaul radios are distinct, it is possible to use a service radio to bridge over from a 5.8 GHz backhaul to 2.4 GHz backhaul as shown in Fig. 5. The 4325 Mobility Relay node on the bottom left has joined the mesh even though the upper links are 5.8 GHz (blue) through the service radio (pink). 

In Infrastructure mode, device to device M2M messaging " goes up the tree".  When (not if) IOT edge device security is compromised. the uplink radios of the corrupted sub trees are simply shut down. This is not possible in peer-to-peer networks.

6. Embedded Machine Controllers For Local Control Loops
 

Fig. 6:  Machine controller applications, in mesh nodes, orchestrating local and remote (supervisory) control loops.  Enlarge

Machine controller applications, running on the mesh nodes, monitor and control enterprise assets at the network edge. M2M messaging is latency and jitter aware. A scalable Pub/Sub messaging framework is supported by periodic packet shuttle services. Performance is analyzed in the cloud, over the supervisory control link. The supervisory cloud controller then tunes local machine controller "apps". The radio and protocol agnostic abstractions ensure that the "apps" are capable of managing a plethora of IP and Non IP based  IOT devices.

A device and communication protocol abstracted framework emerges, capable of  tight integration with "machine controller" applications - on the mesh nodes - that orchestrate sensor-actuator interactions and feedback command and control loops.

Meshdynamics works closely with our source code licensees to simulate and prototype OEM product offerings and solutions.
For more information please see:  The Abstracted Network for Enterprises and the Internet Of Things.
  
Summary


New mesh requirements e.g. more hops to cover larger areas, more efficient bandwidth distribution, better latency and jitter for Video, Voice and M2M communications, have given rise to new mesh architectures. Meshdynamics patented multi-radio backhaul architectures delivers consistent throughput and more-deterministic performance needed to meet these new requirements.

Our device and protocol abstractions support distributed dynamic radio intelligence, frequency agility, automated channel selection, dynamic topology configuration, and seamless extensions for the network "edge".. These capabilities provide single framework solutions for larger scale and diverse application environments at the edge: e.g. Industrial Internet of Things.