System-Level Simulation

DLL, MAC sublayer, and LLC sublayer examples

The data link layer (DLL) is layer 2 in the open systems interconnection (OSI) reference model. The DLL identifies the network protocol type, provides error control, and assembles frames of data for transport. The medium access control (MAC) and logical link control (LLC) sublayers of the DLL are responsible for providing an error free link between two nodes sharing the same channel. In the OSI reference model, the DLL sits between the network layer (layer 3) and physical layer (layer 1) and assembles data packets for transmission by the PHY layer.

Examples presented in this section demonstrate DLL layer operations for system-level links.

Featured Examples

内部IEEE 802.15.4——提供服务MAC Frame Generation and Decoding

Generate and decode MAC frames of the IEEE® 802.15.4™ standard [ 1 ] using the Communications Toolbox™ Library for ZigBee and UWB.

Open Script

内部IEEE 802.15.4——提供服务Asynchronous CSMA MAC

Simulate the IEEE® 802.15.4™ asynchronous CSMA MAC [ 1 ] using the Communications Toolbox™ Library for ZigBee® and UWB.

Open Script

Near Field Communication (NFC)

Model communication between two Near Field Communication (NFC) devices.

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Packetized Modem with Data Link Layer

Implement a packetized modem with Data Link Layer [ 1 ] using MATLAB® and Communications Toolbox™. The modem features a packet-based physical layer and an ALOHA-based Data Link Layer. You can either simulate the system or run with radios using theCommunications Toolbox Support Package for USRP® Radio.

Open Script

ALOHA and CSMA/CA Packetized Wireless Networks

Simulate a basic ALOHA or CSMA/CA MAC using Simulink®, Stateflow® and the Communications Toolbox™.

Open Model