7.2 Wireless Mesh Network Deployment Explained
Key Concepts
Understanding Wireless Mesh Network Deployment involves grasping several key concepts:
- Mesh Topology
- Mesh Nodes
- Routing Protocols
- Self-Healing
- Scalability
Mesh Topology
Mesh Topology is a network structure where each node (device) is connected to multiple other nodes. This creates multiple paths for data to travel, enhancing reliability and redundancy. In a mesh network, data can reach its destination through various routes, ensuring continuous connectivity even if some nodes fail.
Example: Think of a mesh topology as a spider web. Each strand (node) is connected to multiple other strands, creating a complex network. If one strand breaks (node failure), the spider (data) can still reach its destination by following other strands.
Mesh Nodes
Mesh Nodes are the individual devices that form the mesh network. These nodes can be routers, access points, or other wireless devices. Each node acts as both a client and a relay, forwarding data to other nodes until it reaches its destination. This decentralized structure enhances network resilience and coverage.
Example: Consider mesh nodes as volunteers in a relay race. Each volunteer (node) not only runs their part of the race (connects to the network) but also passes the baton (data) to the next volunteer, ensuring the race (data transmission) continues smoothly.
Routing Protocols
Routing Protocols in mesh networks determine the best path for data to travel from source to destination. These protocols dynamically adjust routes based on network conditions, such as signal strength, congestion, and node availability. Common routing protocols for mesh networks include OLSR (Optimized Link State Routing) and B.A.T.M.A.N. (Better Approach To Mobile Ad-hoc Networking).
Example: Think of routing protocols as GPS navigation systems. The GPS (routing protocol) continuously monitors traffic (network conditions) and suggests the fastest route (best path) to reach your destination, adjusting as conditions change.
Self-Healing
Self-Healing is a feature of mesh networks where the network automatically adjusts and repairs itself in case of node failures or changes in network conditions. This is achieved through dynamic routing protocols that find alternative paths for data transmission. Self-healing ensures continuous network operation without manual intervention.
Example: Consider self-healing as a self-repairing bridge. If a section of the bridge (node) collapses, the bridge (network) automatically reroutes traffic (data) to other sections, ensuring continuous flow without needing human intervention.
Scalability
Scalability refers to the ability of a mesh network to grow and accommodate more nodes without degrading performance. In a scalable mesh network, adding new nodes increases network coverage and capacity, enhancing overall performance. This makes mesh networks ideal for large-scale deployments and environments where network expansion is expected.
Example: Think of scalability as a growing tree. As the tree (network) grows, it adds more branches (nodes), increasing its reach (coverage) and ability to support more leaves (devices). Each new branch enhances the tree's overall health and functionality.