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Method for 802.11 management and data frame separation

IP.com Disclosure Number: IPCOM000017127D
Publication Date: 2003-Jul-22
Document File: 2 page(s) / 88K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for 802.11 management and data frame separation. Benefits include improved performance and improved support for future technology.

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Method for 802.11 management and data frame separation

Disclosed is a method for 802.11 management and data frame separation. Benefits include improved performance and improved support for future technology.

Background

              The Institute for Electrical and Electronics Engineers (IEEE) Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications 802.11 (dated 1999) support multiple nonoverlapping channels. Specification 802.11a describes 8-channel architecture. Specification 802.11b describes 3-channel architecture. Each channel is a range of spectrums separated from each other by 5 MHz. An 802.11 device is configured with either a basic service set identifier (BSSID) or an extended service set identifier (ESSID). The ID value is used by the 802.11 network interface card (NIC) to determine which 802.11 packets belong to the wireless local area network (WLAN) in which the device is configured. As a result, multiple wireless networks can be present in the same atmospheric space. When a wireless NIC is operating, it listens to all channels and attempts to identify which channel is carrying the correct ID with the strongest signal.

              The problems for the current IEEE 802.11 specification are that association procedures (APs) allow operation on only one channel with the data and management frames shared on that same channel, even though other channels are available.

              Periodically 802.11 devices are required to transmit some management frames, such as beacon frames, per 400 ms, which occupy the bandwidth of the data transmission.

              Data and control separation is not new. In the universal mobile telecommunications system (UMTS) or circui...