February 19 doc.: IEEE /212r0 February 19

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Presentation transcript:

February 19 doc.: IEEE 802.15-00/212r0 February 19 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Kodak - High Rate MAC Proposal] Date Submitted: [07July2000] Source: [Allen D. Heberling] Company: [Eastman Kodak Co.] Address: [1669 Eastman Ave. Rochester, NY, 14650-2015] Voice:[(716) 588-1939], FAX: [(716) 722-9053], E-Mail:[allen d.heberling@kodak.com] Re: [ ] Abstract: [This presentation outlines Kodak’s MAC proposal to 802.15.3 High Rate Task Group] Purpose: [To communicate the proposal for consideration by the standards team] 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. Allen Heberling, Eastman Kodak Co. Allen Heberling, Eastman Kodak Co.

Eastman Kodak High Rate MAC Proposal to IEEE 802.15.3 February 19 doc.: IEEE 802.15-00/212r0 February 19 Eastman Kodak High Rate MAC Proposal to IEEE 802.15.3 Allen D. Heberling Eastman Kodak Company 1669 Eastman Ave. Rochester, NY, 14650-2015 Allen Heberling, Eastman Kodak Co. Allen Heberling, Eastman Kodak Co.

Overview Summary MAC Architectural Overview 802.15.3 MAC Proposal 1 February 19 Overview Summary MAC Architectural Overview 802.15.3 MAC Proposal 1 802.15.3 MAC Proposal 2 802.15.3 MAC Protocol Criteria Conclusions Allen Heberling, Eastman Kodak Co.

Summary EK MAC Proposals 1 & 2: February 19 Summary EK MAC Proposals 1 & 2: reuse 85-90% of the existing 802.15.1 protocol software components introduce minimal modifications to the existing 802.15.1 protocol EK MAC Proposal 2: introduces a bandwidth efficient MAC algorithm for high rate communications Allen Heberling, Eastman Kodak Co.

802.15.1 MAC Architectural Overview February 19 802.15.1 MAC Architectural Overview L2CAP functionality (see ref: 00113r0P802.15_TG3_802.15-Reusable-SW-Components.doc ) MLME functionality(ibid. ) Baseband Functionality(ibid.) Allen Heberling, Eastman Kodak Co.

Baseband Decomposition February 19 Baseband Decomposition BB_Controller_prc (Link Controller) ACL_prc BB_phy BB_plcp BB_pmd Allen Heberling, Eastman Kodak Co.

Current Baseband Behavior February 19 Current Baseband Behavior Fixed minimum time slot duration Frequency Hop sequencing algorithm FH dwell time Synchronization beacon Preamble and Access Code structure Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal Assumptions February 19 802.15.3 MAC Proposal Assumptions Dual mode PHY capable of 1 Mega-symbol per second and 22 Mbps Tx/Rx rates. Highspeed PHY does not perform frequency hopping. MAC processor capable of handling 22 Mbps data rates. Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal 1 Retain L2CAP functionality February 19 802.15.3 MAC Proposal 1 Retain L2CAP functionality Retain MLME functionality Retain these Baseband capabilities Link controller ACL-process Maintain Access Code format (except current preamble length) Maintain Packet Header format Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal 1 continued... February 19 802.15.3 MAC Proposal 1 continued... maintain these header bit processes: HEC generation and checking whitening and de-whitening maintain these payload bit processes: CRC generation and checking encryption and decryption Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal 1 continued... February 19 802.15.3 MAC Proposal 1 continued... Maintain current time slot order and duration: Master, Slave 625 usec maintain synchronization beacon(only if peer nodes are in hold and/or park mode) Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal 1 continued... February 19 802.15.3 MAC Proposal 1 continued... Modifications to the existing 802.15.3 MAC Suspend FH sequencing and dwell time during turbo mode use an alternate preamble during turbo mode Allen Heberling, Eastman Kodak Co.

Issues with MAC Proposal 1: February 19 Issues with MAC Proposal 1: Fixed time slot scheme limits a 22 Mbps radio’s raw data rate to 11 Mbps. Protocol bit overhead reduces effective throughput rate to approximately 10.5 Mbps Current protocol does not support direct peer to peer(slave to slave) traffic. Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal 2 Retain L2CAP functionality February 19 802.15.3 MAC Proposal 2 Retain L2CAP functionality Retain MLME functionality Retain these Baseband capabilities Link controller ACL-process Maintain Access Code format (except current preamble length) Maintain Packet Header format Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal 2 continued... February 19 802.15.3 MAC Proposal 2 continued... Maintain these header bit processes: HEC generation and checking whitening and de-whitening Maintain these payload bit processes: CRC generation and checking encryption and decryption Maintain synchronization beacon(only if peer nodes are in hold and/or park mode) Allen Heberling, Eastman Kodak Co.

802.15.3 MAC Proposal 2 continued… February 19 802.15.3 MAC Proposal 2 continued… Modifications to the existing 802.15.3 MAC Suspend FH sequencing and dwell time during turbo mode Use an alternate preamble during turbo mode Employ an implicit time token scheduling algorithm Allen Heberling, Eastman Kodak Co.

February 19 Shared Slot Assignment with an Implicit Time Token Scheduling Algorithm Characteristics: Mini Time Slots - currently 3. Slot lengths up to 512 bytes (204.8 usec) in length. Slots may be designated as Isochronous or Asynchronous. An Isochronous slot may be subdivided to support multiple time dependent data streams. Allen Heberling, Eastman Kodak Co.

February 19 Shared Slot Assignment with an Implicit Time Token Scheduling Algorithm Characteristics continued: Asynchronous slot may be sub-divided to allow graceful performance degradation. Maximum Data Throughput = PktLnth/((PktLnth /TxRate)+(Nslot-1)xTAW) 4096bits/((4096bits/22Mbps)+(3-1)x20usec 18.1 Mbps Allen Heberling, Eastman Kodak Co.

February 19 Shared Slot Assignment with an Implicit Time Token Scheduling Algorithm Min. Latency = (PktLnth/TxRate)+ (Nslot-1)xTAW (4096bits/22mpbs) + (3 - 1)x20usec 226.2 usec Maximum Latency = (PktLnth/TxRate) xNslot (4096bits/22mbps)x3 558.5 usec Allen Heberling, Eastman Kodak Co.

February 19 Shared Slot Assignment with an Implicit Time Token Scheduling Algorithm Allen Heberling, Eastman Kodak Co.

February 19 Shared Slot Assignment with an Implicit Time Token Scheduling Algorithm Allen Heberling, Eastman Kodak Co.

February 19 Shared Slot Assignment with an Implicit Time Token Scheduling Algorithm VideoA ms2 ms3 AudioB ... Allen Heberling, Eastman Kodak Co.

Issues with MAC Proposal 2 February 19 Issues with MAC Proposal 2 Proposal 2 in order to support peer to peer(slave to slave) communications needs to add an additional address field. Allen Heberling, Eastman Kodak Co.

February 19 MAC Protocol Criteria Allen Heberling, Eastman Kodak Co.

February 19 MAC Protocol Criteria Allen Heberling, Eastman Kodak Co.

February 19 MAC Protocol Criteria Allen Heberling, Eastman Kodak Co.

February 19 MAC Protocol Criteria Allen Heberling, Eastman Kodak Co.

February 19 MAC Protocol Criteria Allen Heberling, Eastman Kodak Co.

Conclusion EK MAC proposal 2 provides these positive attributes: February 19 Conclusion EK MAC proposal 2 provides these positive attributes: Low Cost Minimum Risk Efficient Use of HighRate Bandwidth Allen Heberling, Eastman Kodak Co.

Conclusion EK MAC proposal 2 provides these positive attributes: February 19 Conclusion EK MAC proposal 2 provides these positive attributes: Time to Market Coexistence with 802.15.1 Supports Ad-hoc coordination of multiple independent piconets Allen Heberling, Eastman Kodak Co.