802.11p MAC Enhancement Proposals November 2004 04-1497 r1 July 2004 doc.: IEEE 802.11-04/0658r0 November 2004 802.11p MAC Enhancement Proposals November 2004 04-1497 r1 Bryan Wells DENSO INTERNATIONAL AMERICA, INC., LA Laboratories Bryan_Wells@DENSO-DIAM.com Bryan Wells, DENSO LA Labs Bruce Kraemer, Conexant

Proposal to provide a Cancel Transmit primitive to the 802.11p MAC November 2004 Proposal to provide a Cancel Transmit primitive to the 802.11p MAC Proposal Packets submitted to the MAC for transmission but not yet transmitted may be withdrawn. Causes the MAC to abandon its attempt to transmit the current message, and reinitialize its operation in preparation for another transmit request. Withdrawn packet may be re-queued or dropped by upper layer requesting the Cancel Transmit. Benefits Provides enhanced QoS for high priority safety messages. Prevents a pending transmit request from holding up required or desired channel switching. Bryan Wells, DENSO LA Labs

November 2004 Proposal for the 802.11p MAC to process only one transmit packet at a time Proposal If the MAC receives a new packet for transmission while there is still a packet pending transmission in the MAC, the MAC will cancel the pending transmission and send the new packet . Benefits Provides enhanced QoS for high priority safety messages. Allows upper layers to override pending lower priority packet transmit requests with higher priority packet transmit requests. Bryan Wells, DENSO LA Labs

November 2004 Straw Poll Do you support the proposal to provide a Cancel Transmit primitive to the 802.11p MAC? Yes: No: Bryan Wells, DENSO LA Labs

November 2004 Straw Poll Do you support the proposal for the MAC to process only one transmit packet at a time; canceling pending packet transmit requests in favor of the new request? Yes: No: Bryan Wells, DENSO LA Labs