IEEE Standard for Local and Metropolitan Area May 2009 http://ieee802.org/16/pubs/80216-2009.html Networks - Part 16: Air Interface for Broadband Wireless Access Systems Revision of IEEE Std 802.16-2004, developed by Maintenance Task Group under the project draft title "P802.16Rev2. This work resulted in the second revision of IEEE Std 802.16, following IEEE Std 802.16-2001 and IEEE Std 802.16-2004. It consolidates and obsoletes IEEE Standards 802.16-2004, 802.16e-2005 and 802.16-2004/Cor1-2005, 802.16f-2005, and 802.16g-2007. IEEE Std 802.16j Amendment of IEEE Std 802.16, Air Interface June 2009 http://ieee802.org/16/pubs/80216j.html for Fixed and Mobile Broadband Wireless Access Systems - Multi-hop Relay Specification IEEE Project Project to amend IEEE Std 802.1 16, Air March 2008 http://ieee802.org/16/pubs/80216i.html P802. 16i Interface for Fixed Broadband Wireless Access (Withdrawn) Systems - Management Plane Procedures and Services IEEE Std 802.16h- Amendment of IEEE Std 802.16, Air Interface May 2010 http://ieee802.org/16/pubs/80216h.html, for Fixed Broadband Wireless Access Systems - Improved Coexistence Mechanisms for License-Exempt Operation IEEE Project Project to amend IEEE Std 802.16-2009, Air March 2011 http://ieee802.org/16/tgm/index.html P802.16m Interface for Fixed and Mobile Broadband Wireless Access Systems - Advanced Air Interface 1.3 Introduction to WiMAX forum mobile system profiles base station is required for relays to operate over the relay links (i.e., the link between relay and base stations). Furthermore, due to the incorporation of various inconsistent optional features and func- tionalities, a relay system profile (i.e., a set of consistent functional components to form a working system) needs to be developed outside the IEEE to enable industry-wide implementation and deployment. Since January 2007, the IEEE 802.16 Working Group has embarked on the development of a new amendment of the IEEE 802.16 standard (i.e., IEEE 802. as an advanced air interface to meet the requirements of ITU-