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- Explain in detail IEEE MAC sublayer!
- Analytical study of the IEEE 802.11p MAC sublayer in vehicular networks;
- MAC - What is the IEEE MAC Sublayer??
- Wi-Fi MAC layer.
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Explain in detail IEEE The Data Link layer header will include at least the following three items: The Type bits 2 and 3 and Subtype bits 4 through 7 fields define the format of the subsequent frame. Bit 10, the "More Frag. If the bit is clear, then this frame is the last fragment, or the frame was never fragmented.
Bit 12, the "Pwr. Collision Avoidance: If channel is sensed busy, the station waits till it's free for DIFS duration, then waits for a random interval before transmitting.
Computer Science > Networking and Internet Architecture
This randomness reduces the chances that two waiting stations end up transmitting at the same time. If ACK is not received, station backs off for a random duration and repeats the process again. What's the structure of Adapted from National Instruments , figs.
There are three types of MAC frames: Only data frames contain higher layer data. Management frames help stations discover and connect to AP. All frames start with a 2-byte Frame Control that specifies the frame type and further details.
Frame Control is part of what's called the MAC header, which can vary in length. Further details on MAC frame are available online.ufn-web.com/wp-includes/39/detecter-logiciel-espion-htc.php
Analytical Study of the IEEE p MAC Sublayer in Vehicular Networks - Semantic Scholar
MAC uses many techniques and here we describe the important ones: Error Detection: For a corrupted frame, receiver will not send an acknowledgment frame. Sender will therefore retransmit the frame.
- IEEE 802.11 MAC Sub-layer Frame Structure?
- Analytical Study of the IEEE 802.11p MAC Sublayer in Vehicular Networks;
When frames are larger, there's a higher chance of collision. Any errors, only fragments need to be retransmitted. Request-to-Send and Clear-to-Send are used to solve the hidden-node problem.
Medium access control
When stations are widely spread around an AP, some may be hidden from others on the wireless channel. This is an optional feature. Showing Hoffmann , slide The idea was to reduce MAC overhead and increase overall throughput. This is done using Frame Aggregation. Two types are possible: Multiple MPDUs are carried within a single transmission frame.
These two are not mutually exclusive: In fact, research has shown that a combination of the two gives best performance on both MAC frame is extended: VHT also impacts deployments in 60 GHz band such as for Frame aggregation can happen like in MAC frame is updated: HT Control is defined for 11ac plus larger payload size.
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