Join Date: Apr 2001
Location: Bournemouth, UK
Motorola Says Bluetooth & 802.11b Can Live in Harmony
Motorola Inc has reworked its Bluetooth silicon to deliver better performance and enable the short-range radio connectivity standard to live in harmony with the common
802.11b wireless LAN standard.
Motorola said yesterday that its Bluetooth version 1.1 platform will be available in the second quarter of 2002, costing $5.90. "It promises a superior Bluetooth user
experience through a design that can provide up to four times the range, plus capacity for twice as many ad hoc networks and operation 50% closer to noise sources
when compared to performance required by the Bluetooth standards," said Bill Dunnigan, corporate VP and GM of Motorola's wireless local connectivity division.
This means that the Bluetooth products using the silicon reference design that makes up the platform could have a range of up to 40 meters (120 feet) and connect to up
16 different compatible devices in personal area networking applications.
The co-existence technology incorporated into the platform could become more important when 802.11b WLAN networks and Bluetooth-enabled devices become
common in the corporate world. Most studies have found that interference and signal degradation do not become a problem for devices using Bluetooth or 802.11b,
though both technologies use the 2.4GHz band, until they are used in close proximity.
Interference could become an issue in corporate settings. For instance, if a user downloads contacts stored on a Bluetooth-enabled PDA on to a laptop that is
connected to an 802.11b network, with both devices sitting close together on a desk, degradation could occur. Eventually, users could have lots of equipment on their
desk that is sending and receiving information over Bluetooth or 802.11b connections, leading to more interference.
However, Motorola said that its Joint Detection & Maximum Likelihood Sequence Estimation (JD/MSLE) signal filtering technology will cut down on interference. The
company said that it will be one of the first to implement the Bluetooth special interest group's adaptive frequency hopping specification, which the company is backing.
Bluetooth silicon is just starting to become a market that vendors can take seriously as a future revenue generator, after several false starts. In-Cahners In-Stat said
recently that 13 million chipsets will be shipped this year, with shipments hitting 780 million by 2005.