IEEE 802.16m Network Reference Model, Functional Architecture, and Protocol Architecture Document Number: IEEE C802.16m-07/304r1 Date Submitted: 2007-11-08. Source: Ronny (Yong-Ho) Kim (ronnykim@lge.com), Kiseon Ryu (ksryu@lge.com), Jin Sam Kwak (samji@lge.com), Suk Woo Lee (sugoo@lge.com), Minseok Oh (minoh@lge.com) LG Electronics, Inc.   Re: TGm Call for Contribution on SDD, IEEE 802.16m-07/040 Abstract : Discussion on IEEE 802.16m network reference model, functional architecture, and protocol architecture in the 802.16m SDD Purpose: To adopt this proposal as a IEEE 802.16m network reference model, functional architecture, and protocol architecture in the 802.16m SDD Notice: This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>. Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat >.

Background (1/2) IEEE 802.16m System Requirement Document specifies as follows; IEEE 802.16m shall provide continuing support and interoperability for legacy WirelessMAN-OFDMA equipment, including MSs and BSs. IEEE 802.16m shall provide the ability to disable legacy support. IEEE 802.16m shall provide support for handover with other RATs. However, an IEEE 802.16m MS is not required to be multi-mode. IEEE 802.16m shall provide service continuity during handover for both inter-RAT and intra-RAT handover. Based on these requirement, IEEE 802.16m network reference model and functional architecture shall be designed so as to provide the ability to enable/disable legacy support and to support inter-RAT and intra-RAT handover.

Background (2/2) 16m Network Reference Model is desirable to include the interface and reference point for both legacy support and disabled legacy support. 16m Network Reference Model is desirable to keep the NCMS for the network control and management to be consistent with the existing current 16 standard. In case of legacy support, the interface between 16m MS and 16m BS should contains both legacy functions to be re-used, and the enhanced functions newly defined in 16m.

Proposed 16m Network Reference Model

Proposed Reference Point Interface Description U Legacy MS - Legacy BS Legacy Air Interface Um 16m MS - 16m BS 16m Air Interface I Legacy BS - Legacy BS Interface between Legacy BSs Im 16m BS - 16m BS Interface between 16m BSs O 16m BS - Non 802.16 Network Interface between 16m BS and Non 802.16 networks to support Inter-RAT HO Note) The interface between 16m MS/BS and legacy BS/MS shall be defined as the same with the reference point U. The interface between 16m BS and legacy BS shall be defined as the same with the reference point I.

Proposed Functional Architecture • 16m Functions – Disabled Legacy Support : A set of functions of 16m MS/BS in a network where the legacy support is disabled • 16m Functions – Legacy Support : A set of functions of 16m MS/BS in a network where the legacy support is enabled Note) The 16m functions in the overlapped region are commonly used in both cases.

<Legacy Support> Conceptual Approach Enhanced system configuration/control information Smooth Migration <Legacy Support> <Disabled Legacy Support> FCH† / MAP† : Enhanced FCH/MAP for supporting 802.16m with legacy support FCHnew/ MAPnew : New FCH/MAP for supporting 802.16m without legacy support 16m Zone #k : New permutation zone for 802.16m without legacy support

Overall Protocol Architecture Main Functionalities per Layer

MAC Functionalities MAC-Function Connectivity : High-Level View