doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 1 Project: IEEE P a Study Group for Wireless Personal Area Networks (WPANs) Submission Title: [Octet Transmission Order for OUI-derived Numbers] Date Submitted: [16 March, 2004] Source: [Peter Johansson] Company [Congruent Software, Inc.] Address [98 Colorado Ave, Berkeley, CA 94707] Voice:[(510) ], FAX: [(510) ], Re: [ b-Octet Transmission Order for OUI-derived Numbers] Abstract:[The document discusses octet transmission order for OUI-derived numbers] Purpose:[Recommend that IEEE adopt uniform octet transmission order conventions for OUI-derived numbers] Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 2 Octet Transmission Order for OUI-derived Numbers

doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 3 IEEE Std Bit and Octet Transmission Order “Octets within numeric fields that are longer than a single octet are depicted in decreasing order of significance, from highest numbered bit on the left to the lowest numbered bit on the right. The octets in fields longer than a single octet are sent to the PHY in order from the octet containing the lowest numbered bits to the octet containing the highest numbered bits.” octets 1 Field AField B 2 b7 – b0 Subfield 1 Subfield 2 b15 – b8b5 – b0 Subfield 1Subfield 2 b7 – b6 bits transmission order

doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 4 Universal Address (MAC-48) A Universal Address is a sequence of six octets. The first three take the values of the three octets of the OUI in order. The last three octets are administered by the assignee. The binary representation of an address is formed by taking each octet in order and expressing it as a sequence of eight bits, least significant bit (lsb) to most significant bit (msb), left to right. For example, the OUI AC-DE-48 could be used to generate the address AC-DE which has the binary representation: transmission order

doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 5 DEV Address Transmission Order Hypothetical DEV Address –Numeric value ACDE ABCD 16 –Canonical representation AC-DE AB-CD –Octet AC 16 is arguably the most significant IEEE transmitted first transmitted next ACDE ABCD 16 most significant least significant

doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 6 LLC/SNAP Header OUI / Protocol ID for “wireless 1394” msB = most significant byte (octet)

doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 7 Application-specific Information Element (ASIE)

doc.: IEEE /134r0 Submission March 2004 Peter Johansson (Congruent Software, Inc.)Slide 8 Recommendations Agree on uniform octet transmission order conventions for OUI-derived numbers Specify octet transmission order conventions in IEEE P a –OUI24 bits –LLC/SNAP40 bits –DEV Address64 bits