Using this PHY layer, BLE offers data rates of 1 Mbps (Bluetooth v4.2)/2 Mbps (Bluetooth v5.0).The transmitter uses GFSK modulation and operates at unlicensed 2.4 GHz.Let us understand functions of different layers of this The figure-2 depicts BLE system architecture. BLE Protocol Stack | BLE System Architecture Any profiles and applications run on top of GAP & GATT protocol layers.Both are interfaced using HCI (Host to Controller Interface). The BLE protocol stack architecture consists of two parts viz.Ĭontroller and host.Provides series of commands for the client to discover information about BLE server. All BLE devices use the GATT profile (Generic Attribute Profile).BLE uses 2.4 GHz ISM frequency band either in dual mode or single mode.ĭual mode supports both bluetooth classic and low energy peripherals.BLE is not backward compatible with BR/EDR protocols.BLE is known as "Bluetooth Smart" where as previous version is known as The latest in the series are v5.0 and v5.1.īLE specifications are intended to reduce power consumption and cost of devices while The version 4.2 and above is referred as BLE. The functions of BLE (Bluetooth Low Energy) system architecture protocol layers are also described.īLE (Bluetooth Low Energy) is wireless PAN technology designed and maintainedīy Bluetooth Special Interest Group (SIG). This page describes BLE Protocol Stack or system architecture.
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