The 802.11 Protocol Stack Part of the 802.11 protocol stack.

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Presentation transcript:

The Protocol Stack Part of the protocol stack.

Wireless LAN Protocols (2) The MACA protocol. (a) A sending an RTS to B. (b) B responding with a CTS to A.

The MAC Sublayer Protocol (2) The use of virtual channel sensing using CSMA/CA.

The MAC Sublayer Protocol (4) Interframe spacing in

The Frame Structure The data frame.

Broadband Wireless Comparison of and The Protocol Stack The Physical Layer The MAC Sublayer Protocol The Frame Structure

The Protocol Stack The Protocol Stack.

The Physical Layer The transmission environment.

The Physical Layer (2) Frames and time slots for time division duplexing.

The MAC Sublayer Protocol Service Classes Constant bit rate service Real-time variable bit rate service Non-real-time variable bit rate service Best efforts service

The Frame Structure (a) A generic frame. (b) A bandwidth request frame.

Bluetooth Bluetooth Architecture Bluetooth Applications The Bluetooth Protocol Stack The Bluetooth Radio Layer The Bluetooth Baseband Layer The Bluetooth L2CAP Layer The Bluetooth Frame Structure

Bluetooth Architecture Two piconets can be connected to form a scatternet.

Bluetooth Applications The Bluetooth profiles.

The Bluetooth Protocol Stack The version of the Bluetooth protocol architecture.

The Bluetooth Frame Structure A typical Bluetooth data frame.

Data Link Layer Switching Bridges from 802.x to 802.y Local Internetworking Spanning Tree Bridges Remote Bridges Repeaters, Hubs, Bridges, Switches, Routers, Gateways Virtual LANs

Data Link Layer Switching Multiple LANs connected by a backbone to handle a total load higher than the capacity of a single LAN.

Bridges from 802.x to 802.y Operation of a LAN bridge from to

Bridges from 802.x to 802.y (2) The IEEE 802 frame formats. The drawing is not to scale.

Local Internetworking A configuration with four LANs and two bridges.

Spanning Tree Bridges Two parallel transparent bridges.

Spanning Tree Bridges (2) (a) Interconnected LANs. (b) A spanning tree covering the LANs. The dotted lines are not part of the spanning tree.

Remote Bridges Remote bridges can be used to interconnect distant LANs.

Repeaters, Hubs, Bridges, Switches, Routers and Gateways (a) Which device is in which layer. (b) Frames, packets, and headers.

Repeaters, Hubs, Bridges, Switches, Routers and Gateways (2) (a) A hub. (b) A bridge. (c) a switch.

Virtual LANs A building with centralized wiring using hubs and a switch.

Virtual LANs (2) (a) Four physical LANs organized into two VLANs, gray and white, by two bridges. (b) The same 15 machines organized into two VLANs by switches.

The IEEE 802.1Q Standard Transition from legacy Ethernet to VLAN-aware Ethernet. The shaded symbols are VLAN aware. The empty ones are not.

The IEEE 802.1Q Standard (2) The (legacy) and 802.1Q Ethernet frame formats.