Page 469 - From GMS to LTE

Bluetooth and Bluetooth Low Energy 455

Table 7.1 Bluetooth versions.

Version Approved Comment

1.0B December 1999 First Bluetooth version, which was used only by a few first‐
generation devices
1.1 February 2001 This version corrected a number of errors and ambiguities of the
previous version (errata list) and helped to increase the
interoperability between devices of different vendors
1.2 November 2003 Introduction of the following new features:
● faster discovery of nearby Bluetooth devices. Devices can now also
be sorted based on signal strength, as described in Section 7.4.2
● fast connection establishment, see Section 7.4.2
● adaptive frequency‐hopping (AFH), see Section 7.4.2
● improved speech transmission, for example, for headsets
(enhanced‐synchronous connection oriented (eSCO)) as
described in Sections 7.4.1 and 7.6.3
● improved error detection and flow control in the L2CAP protocol
● new security functionality: anonymous connection
establishments
2.0 2004 Enhanced datarates extend the Bluetooth 1.2 specification with
faster data transmission modes. Further details can be found in
Sections 7.2 and 7.4.1. The complete standard can be found in [2]
2.1 2007 Security improvements and some functionality enhancements. The
most important are:
● secure simple pairing: security improvements and simplification
of the pairing process
● sniff subrating: additional energy‐saving options for active
connections with sporadic data exchange
● erroneous data reporting for eSCO packets
3.0 + HS 2009 Improvements concerning power management and introduction of
the optional Bluetooth High‐Speed (HS) mode. The HS mode uses
Bluetooth for initial connection establishment and Wi‐Fi for user
data transmission. Most products sold today are Bluetooth
3.0‐compatible but do not implement the optional HS mode
4.0 2010 Integration of Wibree into Bluetooth as Bluetooth Low Energy /
Bluetooth Smart
4.1 2013 Introduces enhancements such as:
● LTE coexistence in nearby bands
● auto re‐connect capabilities when temporary loss of signal occurs
● a device can act as a low‐energy hub and peripheral
simultaneously
● L2CAP‐dedicated channels for future IPv6 communication at the
sensor level
4.2 2014 ● Bluetooth Low Energy link layer packets extended from 27 to 257
user data bytes
● Internet Protocol Support Profile (IPSP) added (IPv6 over
Bluetooth Low Energy)
● An additional Bluetooth Low Energy security mode was
introduced to start encryption during connection setup