Abstract
IEEE802.11s draft proposes a new medium access control (MAC) function-mesh deterministic access (MDA), which is mainly used for single-channel wireless mesh local area network (LAN). In single-channel environment, collisions between control packets and data packets may occur very often. In order to provide higher performance and network capacity for wireless mesh LAN, this article develops an algorithm for MDA to work well on multi-channel wireless mesh LAN. To reduce the hardware requirements in design, a mesh point (MP) only equips single transceiver to support multi-channel environment. To completely avoid the collision between control packets and data packets, the interval of the meshed delivery traffic indication message is first divided into contention period and data transmission period. We newly define a neighbor MP status table for MPs to support multi-channel environment. The mechanism of reserving MDA opportunity (MDAOP) adopts the four-way-handshaking mode to reduce hidden node problem; we propose channel load first random fit and multi-channel best fit mechanisms to select MDAOP. We also propose a multi-channel MDA (MMDA) algorithm to improve the overall performance of wireless mesh LAN in multi-channel environment. The theoretical analysis gives the upper limit of the throughput for MMDA. The simulation experiments clearly show the results in multi-channel wireless mesh LAN environment that MMDA performs better than the enhanced distributed channel access in throughput, average waiting time, and packet drop ratio both in the saturated and non-saturated mode.
Highlights
With the popularity of wireless local area network (LAN), it is inevitable to increase the network coverage
Let us denote Na to be the available MDA opportunity (MDAOP) provided for mesh point (MP) to reserve in data transmission period (DTP) shown in Equation (19), where Nc, B, D, and L are the number of channels in wireless mesh LAN, Each channel’s bandwidth, MDAOP duration, and the average interval between two MDAOPs, respectively
multi-channel MDA (MMDA) algorithm uses four-way-handshaking mechanism to reduce hidden node problems, and mesh delivery traffic indication message (DTIM) interval is divided into contention period (CP) and DTP to completely avoid the collision between control packets and data packets
Summary
With the popularity of wireless local area network (LAN) , it is inevitable to increase the network coverage. By using NMST, NMP can avoid selecting other MMP’s MDAOP, but MMP still records the information of the received NMP’s control packets into its NMST, including NMP’s channel ID, offset, and duration, but the MDA-support field is marked as 0, where duration here means the slot number used for NMP to transmit data.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: EURASIP Journal on Wireless Communications and Networking
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
