Signalling Multicast Group in PSMP frame Month Year Jan 2006 March 2006 Signalling Multicast Group in PSMP frame Date:2006-03-06 Authors: Notice: This document has been prepared to assist IEEE 802.11. 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 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 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <stuart.kerry@philips.com> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <patcom@ieee.org>. Nokia, Inc Bin Wang, ZTE Corporation

Signalling Multicast address in PSMP frame (option 1) March 2006 Signalling Multicast address in PSMP frame (option 1) Set DA field of PSMP frame to “Multicast Address” STA_ID field in STA_INFO field is set to “All 0’s” STA_INFO fields carrying information for individual STAs can be used to schedule unicast data to the STA ULT period is used to transmit ACK for DL multicast data along with any UL data Nokia, Inc

Signalling Multicast address in STA_INFO field (option 2) Month Year Jan 2006 March 2006 Signalling Multicast address in STA_INFO field (option 2) PSMP frame Category Action Frame type PSMP Parameter Set (2 bytes) STA Info repeated N_STA times (N_STA*8 bytes) STA_Info field TSID STA ID DLT Start offset DLT Duration ULT Start offset ULT Duration 8 bits 16 bits 11 bits 10 bits When indicating multicast transmission the contents of the STA_INFO field: STA_ID field is set to 0 (STA_ID set to 1 for broadcast) TSID field (this field is don’t care) – Can be used to indicate multicast group address. 8 LSB of the multicast address DLT Startoffset, DLT Duration – Indicate the transmission time of the multicast data ULT Start offset and ULT Duration fields - Can be used to indicate a multicast group address. LSB of Multicast address. Nokia, Inc Bin Wang, ZTE Corporation

Multicast Group address March 2006 Multicast Group address Different mechanisms can be used to come up with the multicast address (not in the scope of current presentation): Use the LSB of the multicast group (from IP address) The network can create a multicast AID/Group ID dynamically. Based upon the number of bits that are available the LSB (or the complete address) of the multicast address can be used to signal the multicast group Nokia, Inc

Straw Poll Indicate multicast group id in PSMP frame DA address March 2006 Straw Poll Indicate multicast group id in PSMP frame DA address Y N Indicate multicast group id in the STA_INFO fields (that has STA_ID set to all 0’s) of PSMP When indicating multicast group id in the STA_INFO field use ULT fields of STA_INFO that has STA_ID set to “0” to indicate (LSB of) multicast group id Nokia, Inc