Bluetooth® technology is considered a Wireless Personal Area Network (WPAN) system, intended for cable replacement and short distance ad hoc connectivity. It’s size and scope are what differentiates itself from other types of wireless networks.
Communications in WPAN are normally confined to a person or object and extend up to 10 meters in all directions. In contrast, a Wireless Local Area Network (WLANs) typically covers a moderately sized geographic area, in the 100-meter range, such as a single building. WLANs are intended to augment rather than replace traditional wired LANs. They are often used to provide the final few feet of connectivity between the main network and the user.
ST fully supports the coexistence of both Bluetooth® and Wireless LAN connectivity. In fact, as a key developer and manufacturer of chips supporting both technologies, ST believes there is not only a need for both products to coexist, but also a need to cohabitate within the same system.
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| The STLC2500 and WLAN Coexistence |
The STLC2500 incorporates dedicated WLAN coexistence hardware to meet the most stringent timing requirements for your applications. It has the ability to control via HCI.
In addition it supports 2, 3, & 4 wire modes and a wide range of coexistence algorithms with register settings that support customized implementations such as: |
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PTA (Packet Traffic Arbitration) according IEEE 802.15.2 |
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WLAN chip is master, blocking STLC2500 when required |
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STLC2500 is master, blocking WLAN chip when required |
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Two-wire mechanism |
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Alternating Wireless Medium Access (AWMA) |
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| Both, the IEEE Coexistence Task Group and the Bluetooth® Special Interest Group (SIG) are looking at techniques for alleviating the impact of interference related to the coexistence of wireless devices. ST is a participating member of both organizations. |
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