* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 00205r1P802-15_TG3-MAC-Proposal-for-High-Rate
Survey
Document related concepts
Recursive InterNetwork Architecture (RINA) wikipedia , lookup
Wireless security wikipedia , lookup
Piggybacking (Internet access) wikipedia , lookup
Wake-on-LAN wikipedia , lookup
List of wireless community networks by region wikipedia , lookup
Airborne Networking wikipedia , lookup
Computer network wikipedia , lookup
IEEE 802.1aq wikipedia , lookup
Zero-configuration networking wikipedia , lookup
Power over Ethernet wikipedia , lookup
Cracking of wireless networks wikipedia , lookup
Network tap wikipedia , lookup
Transcript
doc.: IEEE 802.15-00/205r1 Intermec’s PicoLink WPAN MAC Overview Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 Initial Targeted Applications for PicoLink Ent • Cable replacement (point to point) Ent 1 2 4 5 7 8 9 3 0 3 F1 – Barcode scanner to portable/mobile computer – Printer to portable/mobile computer SCAN F2 3 6 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 • Personal area connectivity (peer to peer) – hand held computer to numerous peripheral devices including scanners, printers, wide area network radios, etc. PEN*KEY 6500 Picking Application Scan Item Description: Scan Location: Enter Quantity: Keyboard 000123456 Tide Liq., 50oz. BAY 31 40 Keypad Help Exit Take to Location: Dock 5A Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 Newly Targeted Applications Existing WPANs High Rate WPANs Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 WPAN Solution Requirements •Very low cost •Low power consumption •Small size •Minimal attach/detach times •Interference immunity •Ease of use •Standardized interfaces •Unlicensed, international usability Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 PicoLink Concept •Complementary to WLAN/IEEE 802.11 devices –some of the WLAN’s areas of performance have been sacrificed for cost/size/current drain –reduced range, roaming is not optimum •Lower complexity than WLAN devices –reduced RF specifications –reduced MAC/PHY complexity –this MAC has similarities to the 802.11 IBSS/adhoc •Features which do not add recurring costs –peer to peer with up to 10 nodes per PAN Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 Picolink Configurations Personal Area Network PowerPad DADS Terminal Astra Printer PowerShip terminal EST 6700 Ethernet Infrastructured Network Access Point Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 Picolink Configurations Personal Area Network PowerPad DADS Terminal Astra Printer PowerShip terminal EST • Personal Area Network (PAN; Peer-to-Peer) – Multiple Networks co-habitate (20 or more have been tested, but this attribute is dependent upon the PHY) – Up to 10 devices in a single PAN – Dynamic PAN and device IDs with network initiation – Network maintained devices coming and going – Temporary devices and NETWORKS also supported Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 Picolink Configurations 6700 Ethernet Access Point Limited Infrastructured Network • Limited Infrastructured Network – Main device (access point) typically has power at all times (for fast access) – Support for up to 10 devices – Ethernet access points with higher layer protocol Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Transparent to Upper Layer Protocols • Ease of Use – Unique 48 bit address – Simple network join/un-join procedure – Device registration Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Delivered Data Throughput – For the proposed aggregate rate of 44 Mbps a throughput of 28 Mbps is anticipated but depends upon the PHY (e.g. reducing Rx-Tx to 10µS increases throughput to 34 Mbps with 2048 byte frames) • Fast Response – Average response time for small packets is under 5 mS for current 1 Mbps system, projected to be less at higher data rate Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Data Transfer Types – Asynchronous • short response times • CSMA/CA; collision sense/collision avoidance (very much like 802.11) – Isochronous (we propose a timebounded service to provide a level of QoS although CSMA presents bandwidth limitation for Isochronous operation – Mixed traffic load management Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Topology – Minimum number of active connections • Up to 10 nodes per network – Ad hoc network • Fully supported • Temporal ad-hoc networks are also supported – Access to portal • Any node on the network can provide a portal to another network • Multiple portals are possible Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Reliability – Master redundancy • Any node on the network can assume the master(coordinator) role either by request from the master or by disappearance of the master – Loss of connection • The proposed system does provide a method for detection and recovering from the loss of a link • System has options allowing it to conserve current drain by allowing periodic searches for link re-establishment rather than continuous searches Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Power Management Types – Sleeping • Multiple time increments for sleeping are selectable, e.g. 1,2…beacon periods – Wakeup • Schedule service intervals allow the MAC to adapt to various PHY wakeup times – Polling • Beacons are scheduled and allow the nodes to wakeup listen for any pending messages and then go back to sleep if there are no messages Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Power Consumption of MAC controller – Transmit: 20 mA – Receive: 30 mA – Sleep: .3 mA – Other Power Consumption Features • programmable search duty cycle during loss of connect • Slave to slave links require less energy in a Peer to Peer topology than a Master/Slave topology Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Security – Authentication. Propose a modified Safer algorithm be used, as in Bluetooth – Privacy. Propose the use of the Bluetooth algorithm • Quality of Service – Will be a function of environment congestion Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 MAC Protocol Criteria • Cost/Complexity – Baseband controller – functionality described for the HR MAC is estimated to be much less than 6,000 gates additional to the 802.15.1 MAC (10,000 gates w/o reuse). – Code size – under 32 Kbytes in addition to the 802.15.1 MAC Submission Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 CRITERIA REF. - Transparent to Upper Layer Protocols (TCP/IP) Unique 48-bit Address 3.1 FALSE 3.2.1 Simple Network Join/UnJoin Procedures for RF enabled devices 3.2.3 Not Qualified (required by 802) Extended procedure for joining network Device Registration 3.2.3 Submission Requires manual configuration Comparison Values Same TRUE N/A Essential N/A 802.15.1 style join as specified in sections 8.10.6, 9.3.23 and 11.6.5.5 802.15.1 style registration as specified in sections 8.10.7 and 11.6.5.1-4. Enhanced selfconfiguration of network + Auto registration based on profile Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 CRITERIA REF. 20 Mbps minus MAC overhead 20 – 39 Mbps Comparison Values Same 20 Mbps > 20 Mbps 40 Mbps > 40 Mbps Mixed Mode (Asynchronous & Isochronous simultaneously) Point-to-Multipoint, Point-to-Point & Peer-to-Peer + Minimum delivered data throughput High end delivered data throughput (Mbps) Data Transfer Types 3.3.2 3.4 Asynchronous only Asynchronous or Isochronous Topology 3.5.1 Point-toMultipoint only Point-to-Multipoint & Point-to-Point (with no Peer-to-Peer) Submission 3.3.3 Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 CRITERIA REF. - Max. # of active connections Ad-Hoc Network Access to a Portal Master Redundancy Loss of Connection Power Management Types Submission 3.5.2 <7 3.5.3 3.5.4 3.6.2 3.6.3 3.7 FALSE FALSE FALSE FALSE Does not support power savings modes Comparison Values Same 7 TRUE TRUE TRUE TRUE Supports 802.15.1 power savings modes as specified in sections 8.10.8.2-4 and 11.6.6.1-5 + >7 Enhanced N/A Enhanced N/A Enhanced power savings modes Pat Kinney, Intermec Technologies doc.: IEEE 802.15-00/205r1 CRITERIA REF. > 1.5 watts Power Consumption of MAC controller (the peak power of the MAC combined with an appropriate PHY) Authentication 3.8 3.9.1 No authentication Privacy 3.9.2 No encryption Quality of Service 3.9.2 No provisions for QoS Submission Comparison Values Same Between .5 watt and 1.5 watts 802.15.1 style authentication as specified in sections 8.14.4 and 9.3.2 Encryption as specified in 802.15.1 section 8.14.3 and 9.3.6 Equivalent to QoS specified in 802.15.1 section 9.3.20 , 10.6.3 and 11.6.6.6 + < .5 watt Enhanced authentication at MAC layer Enhanced privacy at MAC layer Streams, priority, Controlled latency/jitter bounds, Connection agreements, Dynamic bandwidth allocation, Selective retransmission, Dynamic channel selection Pat Kinney, Intermec Technologies