Fragmentation extended subheader format IEEE 802 16 Presentation

Fragmentation extended subheader format IEEE 802. 16 Presentation Submission Template (Rev. 9) Document Number: IEEE C 802. 16 m-09/0114 r 1 Date Submitted: 2009 -01 -13 Source: Whai-En Chen, wechen@niu. edu. tw National Ilan University Shiann-Tsong Sheu, Chih-Cheng Yang National Central University Kanchei (Ken) Loa, Yi-Hsueh Tsai, Chun-Yen Hsu, Youn-Tai Lee, Tsung-Yu Tsai, Chiu-Wen Chen, Yi-Ting Lin Institute for Information Industry *<http: //standards. ieee. org/faqs/affiliation. FAQ. html> Venue: IEEE 802. 16 m-08/052: Call for Comments on Project 802. 16 m System Description Document (SDD) Base Contribution: N/A Purpose: Propose a signaling MAC header for 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/sect 6 -7. html#6> and <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3>. Further information is located at <http: //standards. ieee. org/board/pat-material. html> and <http: //standards. ieee. org/board/pat >.

Motivation • Because a PDU only contains one fragmentation, the length information of fragmentation is implicitly indicated by the length field of generic MAC header and can be omitted in fragmentation extended header. • The fragmentation extended header and packing extended header shall be designed separately because the packing extended header must contain a length field. • Therefore, we propose a fragmentation extended header.

Example of Short Fragmentation Extended header without ARQ • FC (fragmentation control): FC indicates the fragment state. • Fragmentation sequence number (FSN): FSN indicates the fragmentation sequence number of MSDU when ARQ is not enabled and Extended Type bit is not set.

Example of Long Fragmentation Extended header without ARQ • FC (fragmentation control): FC indicates the fragment state. • Fragmentation sequence number (FSN): FSN indicates the fragmentation sequence number of MSDU when ARQ is not enabled and Extended Type bit is set.

Example of Long Fragmentation Extended header with ARQ • FC (fragmentation control): FC indicates the fragment state. • Block sequence number (BSN) : BSN indicates the ARQ block sequence number when ARQ is enabled.

Proposed SDD Text (1/3) • 10. 12. 2. 1 Fragmentation and packing extended header IEEE 802. 16 m supports MSDU fragmentation. Each MPDU contains a fragmented MSDU. Figure xxx shows the short fragmentation extended header without ARQ Figure xxx. Short fragmentation extended header without ARQ l Type : Type indicates the format of fragmentation extended header. l Frame control (FC): FC indicates the fragment state. l Fragmentation sequence number (FSN): FSN indicates the fragmentation sequence number of MSDU when ARQ is not enabled and Extended Type bit is not set.

Proposed SDD Text (2/3) Figure yyy shows the long fragmentation extended header without ARQ Figure yyy. Long fragmentation extended header without ARQ l Type : Type indicates the format of fragmentation extended header. l Frame control (FC): FC indicates the fragment state. l Fragmentation sequence number (FSN): FSN indicates the fragmentation sequence number of MSDU when ARQ is not enabled and Extended Type bit is set.

Proposed SDD Text (3/3) Figure zzz. shows the fragmentation extended header with ARQ. l Type : Type indicates the format of fragmentation extended header. l Frame control (FC): FC indicates the fragment state. l Block sequence number (BSN) : BSN indicates the ARQ block sequence number when ARQ is enabled.