IEEE 802.20
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IEEE 802.20 or Mobile Broadband Wireless Access (MBWA) is an IEEE Standard to enable worldwide deployment of multi-vendor interoperable mobile broadband wireless access networks[1]
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[edit] Overview
It is hoped that such an interface will allow the creation of low-cost, always-on, and truly mobile broadband wireless networks, nicknamed as Mobile-Fi.
IEEE 802.20 will be specified according to a layered architecture, which is consistent with other IEEE 802 specifications. The scope of the working group consists of the physical (PHY), medium access control (MAC), and logical link control (LLC) layers. The air interface will operate in bands below 3.5 GHz and with a peak data rate of over 1 Mbit/s.
The goals of 802.20 and 802.16e, the so-called "mobile WiMAX", are similar. A draft 802.20 specification was balloted and approved on January 18, 2006.
The IEEE approved 802.20-2008, Physical and Media Access Specification on 12 June 2008. This is now freely available from the IEEE website.
The baseline specifications that have been proposed for this specification aim considerably higher than those available on our current mobile architecture.
[edit] Technical description
The standard's proposed benefits:
- IP roaming & handoff (at more than 1 Mbit/s)
- New MAC and PHY with IP and adaptive antennas
- Optimized for full mobility up to vehicular speeds of 250 km/h
- Operates in Licensed Bands (below 3.5 GHz)
- Utilizes Packet Architecture
- Low Latency
Some technical details
- Bandwidths of 5, 10, and 20 MHz.
- Peak data rates of 80 Mbit/s.
- Spectral efficiency above 1 bit/sec/Hz using MIMO.
- Layered frequency hopping allocates OFDM carriers to near, middle, and far-away handsets, improving SNR (works best for SISO handsets.)
- Supports low-bit rates efficiently, carrying up to 100 phone calls per MHz.
- Hybrid ARQ with up to 6 transmissions and several choices for interleaving.
- Basic slot period of 913 microseconds carrying 8 OFDM symbols.
- One of the first standards to support both TDM (FL,RL) and separate-frequency (FL, RL) deployments.
[edit] History
The establishment of the Mobile Broadband Wireless Access (MBWA) Working Group was approved by IEEE Standards Board on December 11, 2002 with aims to prepare a formal specification for a packet-based air interface designed for IP-based services.
On 8 June 2006, the IEEE-SA Standards Board directed that all activities of the 802.20 Working Group be temporarily suspended. This suspension was effective immediately and continued until 1 October 2006.[2] [3]
On 15 September 2006, the IEEE-SA Standards Board approved a plan to enable the IEEE 802.20 Working Group to move forward with its work to develop a mobile broadband wireless access standard and provide the best opportunity for its completion and approval.[4]
On 17 July 2007, the IEEE 802 Executive Committee along with its 802.20 Oversight Committee approved a change to voting in the 802.20 working group. Going forward voting was changed from an individual voting member to an entity based system. Since the original allegation of dominance and lack of transparency of the process had been raised this was a possibility. With some of those issues possibly again being an issue the IEEE 802 management groups took this proactive step in another attempt to secure the IEEE process for this particular standard.[5]
On 12 June 2008, the IEEE approved the new standard.[1]
[edit] See also
- IEEE 802 group
- IEEE 802.16 WiMax
- IEEE 802.22
[edit] References
- ^ a b "IEEE Working Group Announces Updated 1647-2008 e Language Standard (12 June 2008)". http://standards.ieee.org/announcements/802.20approval.html. Retrieved on 2008-06-15.
- ^ Steve Mills. "Status of 802.20". IEEE. http://grouper.ieee.org/groups/802/mbwa/email/pdf00015.pdf. Retrieved on 2008-06-15.
- ^ "EETimes.com - Updated: IEEE 802.20 working group declares 'cooling off' period (15 June 2006)". http://www.eetimes.com/news/latest/showArticle.jhtml?articleID=189401737. Retrieved on 2008-06-13.
- ^ "IEEE-SA ADOPTS PLAN TO MOVE 802.20(TM) BROADBAND WIRELESS STANDARD FORWARD". http://standards.ieee.org/announcements/pr_80220plan.html. Retrieved on 2008-06-13.
- ^ "Media Statement from IEEE Standards Association Regarding the Status of the IEEE 802.20 Standard and Working Group". http://standards.ieee.org/announcements/802.20std_status.html. Retrieved on 2008-06-13.
