Traffic identifier

In a WLAN, packets can be a stream of video, voice, or data, which each have different priorities to be served by an access point. The Traffic Identifier (TID) is an identifier used to classify a packet in Wireless LANs. When a base station receives an 802.11 frame with the TID set for audio, for example, the priority given is higher than a data frame.

TID is part of a QoS concept in Wireless LAN introduced by the Institute of Electrical and Electronics Engineers in 802.11e as part of the 802.11 standards family. It is represented as a four-bit number (0-3), identifying QoS traffic within MAC data services.[1] There are 16 (24) possible values for TID; out of them, only 8 are practically usable to identify differentiated services. The values of TID is similar to the values used in Differentiated services.

The TID subfield sits in certain MAC frames. The presence of TID, and thus the presence of QoS, is determined by the value set in the MSB of the subtype field (bit b7) of the Frame Control field. A QoS-enabled 802.11 header uses the TID to classify and prioritize processing of incoming or outgoing frames. A TID value from 0-7 are defined for user traffic priority and mapped to Access Categories (AC) while TID range 8-15 is reserved for management and control frames.

References

  1. ^ Amendment 8: Medium Access Control (MAC) Quality of Service Enhancements. IEEE Computer Society. 2005. pp. 1–212. doi:10.1109/IEEESTD.2005.97890. ISBN 978-0-7381-4789-5.
Wikiversity logo
Wikiversity has learning resources about Topic:Web Science/Part1: Foundations of the web/Internet Architecture/Ethernet

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.