Information technologyTelecommunications and information exchange between systemsLocal and Metropolitan area networksSpecific requirements Part 15.3: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for High Rate Wireless Personal Area Networks (WPANs)
|Publication Date:||6 December 2005|
This standard defines the PHY and MAC specifications for high data rate wireless connectivity with fixed, portable and moving devices within or entering a personal operating space. A goal of this standard will be to achieve a level of interoperability or coexistence with other 802.15™ standards. It is also the intent of this standard to work toward a level of coexistence with other wireless devices in conjunction with coexistence task groups such as 802.15.2™.
Based on the previous calls for applications collected for 802.15, there remained a significant group of applications that could not be addressed by 802.15.1™. High data rates are required for time dependent and large file transfer applications such as video or digital still imaging without sacrificing the requirements of low complexity, low cost and low power consumption. 20 Mb/s is proposed to be the lowest rate for these types of data.
It is possible, for example, that several data rates would be supported for different consumer applicatons. Consequently, the notions of cost, frequency band, performance, power and data rate scalability were addressed in the development of this standard.
A personal operating space is a space about a person or object that typically extends up to 10 m in all directions and envelops the person whether stationary or in motion. Personal operating space use models permit more freedom over the design of the radio than in medical or enterprise LAN applications where the primary goal is link robustness at long range. In an area covered by a WLAN, it is expected that a robust link would be established anywhere within the coverage area without any special action on the part of the user. Link robustness is equally important for a WPAN but it is acceptable to take an action like moving closer to establish it. Consequently, WPAN standards are able to focus on other priorities, such as cost, size, power consumption and data rate.
It is not the intent of this standard to be an extension of 802.15.1, because the MAC needs are different. It is, however, in the best interest of users and the industry to strive for compatibility, or at least coexistence with other wireless systems, especially those in similar market spaces such as 802.15.1. Compatibility and coexistence criteria were included in the proposal evaluations.