Networking over Bluetooth Classic is a equally inaccessible to applications, and its implementation (PPP over an emulated serial connection) is a joke on its own. The IPSP they mention as a first choice would already be a vast improvement by avoiding GATT – but while cell phones advertise Bluetooth, all they often expose to applications is GATT. If Bluetooth implementations offered a service that provides network and switched between LE and regular modes depending on traffic, they'd sure use it. SDP uses a client-server model where the server has a list of services defined through service records.Cut them some slack there – going over GATT is not a choice, it's the only way out of a cellphone in those situations. Service Discovery Protocol (SDP): SDP enables a Bluetooth device to join a piconet. L2CAP is also responsible for multiplexing Bluetooth packets from different applications. Logical Link Control and Adaptation Protocol (L2CAP): This layer is responsible for the segmentation of large packets and the reassembly of fragmented packets. These perform various security functions stuffing from authentication to encryption. Link Manager Protocol (LMP): When the Bluetooth devices come within each other’s radio range, the link manager engage itself in the peer-to-peer message exchange. This layer uses inquiry and paging procedures to synchronize the transmission with the different Bluetooth devices. Base-band: The baseband enables the physical radio frequency (RF) link between units forming a piconet. A collection of piconets connected by a bridge node in a large room is often known as Scatternet.īluetooth Protocol Stack in Mobile Computing:īluetooth Protocol Stack can be divided into four basic layers, These are: A piconet contains a master node and up to seven active slave nodes within a distance of 10m. The latest version of Bluetooth 5.0 provides the average speed of data transmission is around 10 Mbps – 24 Mbps. The average speed of data transmission in Bluetooth technology is around 1 Mbps to 3 Mbps.

The latest version of Bluetooth 5.0 can exchange data in the range of about 40-400 meters. In Bluetooth, the wireless signals transmit the data and files over a short distance, typically up to 30 feet or 10 meters. So, it is used to send or receive data to connected devices present across a certain distance using the 2.4 GHz ISM spectrum band (2400 to 2483.5 MHz). Bluetooth is an open-wireless standard technology. IEEE 802.15 committee is standardizing only the physical layer and data link layer. It should be noted that the Bluetooth specification is for a full system from the physical layer to the application layer.

Bluetooth protocol stack