nutriopk.blogg.se - Wifi vs bluetooth osi model

Functions such as connection establishment and release, among others, are Link Management (LM) features.

synchronize the network devices with the master clock and manage the different devices for power saving statesĪ Link Management Protocol (LMP) is a control protocol responsible to establish base-band and physical layer links.

send and receive packets along the physical channels.

set-up the physical connections between the master and slaves.

The main roles of the Bluetooth MAC layer are to: The Base-band Layer defined by the IEEE 802.15.1 standard operates in the 2.4-GHz Industrial Scientific and Medical (ISM) band using a short-range radio link and a Fast Frequency-Hopping (FFH) transceiver. Bluetooth power class classification is as shown in the below figure. This FHSS technique increases the robustness of the link due to its capability to reduce the interference of nearby systems that may operate in the same frequency range. The Radio layer provides the physical links among Bluetooth devices with 79 different Radio Frequency (RF) channels spaced of 1 MHz, using a Frequency Hopping Spread Spectrum (FHSS) transmission technique. The Radio and the Base-band sub-layers define the Bluetooth physical layer. The mapping of OSI reference model to IEEE 802.15.1 Bluetooth stack is given below.

Improvements in transmission and receiving.

Low energy is reinforced with the adoption of longer packet transmissions.Better alignment in pico-nets timing when the transmission suffers interference.Increased modulation index resulting in less energy during transmission.Enhanced power control to quickly adapt to the changing path loss of the new 5GHz transmission band.Improved indoor range and LOS range to 100m.Improved resistance to radio frequency interference.v1.0B (voice dialling, call mute, 10m range).

The different versions of Bluetooth are as follows: WPAN IEEE 802.15.1 also called the Bluetooth Basic Rate (BR) is a global 2.4 GHz specification working with short-range wireless networking. The classification of link layer protocols based on range supported is shown below. Development and deployment of protocols focus on the following issues:Īn overview of the wireless protocols in IoT with respect to TCP/IP stack is shown in the below figure. The issues related to choosing a certain technology for a particular solution are network topology, power consumption, transmission power efficiency, and latency. Introduction to Wireless Protocols for IoT

7.3 Internet Protocol version 6 (IPv6) over IEEE 802.15.4.

1 Introduction to Wireless Protocols for IoT.