15-05-0083-00-0400 submission january, 2005 rene struik, certicom corp.slide 1 project: ieee p802.15...
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January, 2005
Rene Struik, Certicom Corp.Slide 1
15-05-0083-00-0400
Submission
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Suggestions for Improvement of the IEEE 802.15.4 WPAN Standard]Date Submitted: [January 19, 2005]Source: [René Struik] Company [Certicom Corp.]Address [5520 Explorer Drive, 4th Floor, Mississauga, ON Canada L4W 5L1]Voice:[+1 (905) 501-6083], FAX: [+1 (905) 507-4230], E-Mail:[[email protected]]
Re: [IEEE documents: 02/474r2 (January 16, 2003, Slides 5-6), 15-03-320-00-0040 (July 23, 2003, Slides 4-6), 15-03-320-02-0040 (November 11, 2003, Slides 6-9)]
Abstract: [Suggestion for Multicast Support in IEEE 802.15.4b Low-Rate WPAN standard.]
Purpose: [Assist in improving the IEEE 802.15.4 WPAN standard (Draft D18).]Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15.
January, 2005
Rene Struik, Certicom Corp.Slide 2
15-05-0083-00-0400
Submission
Multicast Addressing Proposal for Draft IEEE 802.15.4bWPAN Standard
René Struik, Certicom Research
January, 2005
Rene Struik, Certicom Corp.Slide 3
15-05-0083-00-0400
Submission
Multicasting Support (1)
Destination Addressing fields:<destination address> ::= <physical address> | <logical address>
Short destination addresses:• Ordinary destination addresses: 0x0000 – 0xFFEF (65,520=65,536-16 addresses)• Logical destination addresses: 0xFFF0 – 0xFFFF (16 multicast addresses)
Filtering incoming frames by device B:• Check on B’s long address;• Check on B’s (short address, PANId) combination• Check membership multicast group:
(1) Multicast enabled iff DestAddr=0xFFXY;(2) Membership test succeeds iff B is member of ‘XY’ multicast group
Notes:• Multicast ON/OFF decision does not require introduction of separate multicast bit• Membership test: matching ‘XY’ G (set of groups B is member of)• Set of logical destination addresses fixed (i.e., meaning centrally determined)
January, 2005
Rene Struik, Certicom Corp.Slide 4
15-05-0083-00-0400
Submission
Multicasting Support (2)
Destination Addressing fields:<destination address> ::= <physical address> | <logical address>
{option indicated by 1-bit multicast indicator}
Short destination addresses:• Ordinary destination addresses: 0x0000 – 0xFFFF (65,536 addresses)• Logical destination addresses: 0x0000 – 0xFFFF (65,536 multicast addresses)
Filtering incoming frames by device B:• Check on B’s long address;• Check on B’s (short address, PANId) combination• Check membership multicast group:
(1) Multicast enabled if multicast bit set;(2) Membership test succeeds iff B is member of DestAddr multicast group
Notes:• Multicast ON/OFF decision does require introduction of separate multicast bit• Membership test: matching DestAddr G (set of groups B is member of)• Set of logical destination addresses not fixed (i.e., meaning decentralized)
January, 2005
Rene Struik, Certicom Corp.Slide 5
15-05-0083-00-0400
Submission
Multicasting Support (3)
Motion 1:Use one of the bits in the presently (802.15.4-2003) reserved fields in the FrameControl Field in MAC Header as multicast bit indicator (0: multicast OFF; 1: multicastON).
Proposal: take bit b7 of the FCF for this purpose (since this is on octet boundary, thusleaving b8-b9 reserved).
January, 2005
Rene Struik, Certicom Corp.Slide 6
15-05-0083-00-0400
Submission
Multicasting Support (4)Motion 2:Structure logical destination address as follows:
Addressing fields:<source address> ::= <physical address><destination address> ::= <physical address> | <logical address>
{option indicated by 1-bit multicast indicator}<physical address> ::= implicit: coordinator | <short address> |
<short Address><PAN Id> | <long address>{option indicated by 2-bit addressing mode}
<logical address> ::= <group source> <group Id><group source> ::= <physical address><group Id> ::= <group counter>
“Atoms” (end symbols in grammar):<short address> ::= 16-bit address<long address> ::= 64-bit address<PAN Id> ::= 16-bit PAN address<group counter> ::= 1-octet field {this allows 256 groups with same group source}