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                           <rdf:li><rdf:Description xmpDM:name="802.11" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- MAC management Synchronization try to find a LAN, try to stay within a LAN timer etc." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Power management sleep-mode without missing a message periodic sleep, frame buffering, traffic measurements Association/Reassociation integration into a LAN roaming, i.e." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="change networks by changing access points scanning, i.e." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="active search for a network MIB - Management Information Base managing, read, write Prof." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Synchronization using a Beacon (infrastructure) Prof." xmpDM:startTime="59933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="59933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="59933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="59933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications beacon interval (20ms – 1s) t medium access point busy B busy busy busy B B B value" xmpDM:startTime="59933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="of the timestamp B beacon frame" xmpDM:startTime="59933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Synchronization using a Beacon (ad-hoc) Prof." xmpDM:startTime="136967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="136967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="136967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="136967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications t medium station1 busy B1 beacon interval busy busy busy B1 value of the timestamp B beacon frame" xmpDM:startTime="136967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="station2 B2 B2 random delay" xmpDM:startTime="136967" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Power management Idea: switch the transceiver off if not needed States of a station: sleep and awake Timing Synchronization Function" xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(TSF) stations wake up at the same time Infrastructure Traffic Indication Map (TIM) list of unicast receivers transmitted by AP" xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Delivery Traffic Indication Map (DTIM) list of broadcast/multicast receivers transmitted by AP Ad-hoc Ad-hoc Traffic Indication Map (ATIM) announcement of" xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="receivers by stations buffering frames more complicated - no central AP collision of ATIMs possible (scalability?) APSD (Automatic Power Save" xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Delivery) more efficient method in 802.11e" xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="replacing above schemes offering scheduled (S-APSD) and unscheduled service periods (U-APSD) Prof." xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="211000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Power saving with wake-up patterns (infrastructure) Prof." xmpDM:startTime="331100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="331100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="331100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="331100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications TIM interval t medium access point busy D busy busy busy T T D T TIM D DTIM" xmpDM:startTime="331100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="DTIM interval B B B broadcast/multicast station awake p PS poll p d d d data transmission to/from the station" xmpDM:startTime="331100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="331100" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="U-APSD – WMM Power Save Procedure for unicast data delivered to a STA in PS mode STA triggers release of" xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="buffered data from AP WMM Power Save based on legacy procedures plus optional U-APSD Advantages: No more polling needed Downlink" xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="data frames sent together in a fast sequence Trigger frame may already contain data – ideal e.g." xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="for VoIP Applications specify PS behavior, i.e." xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="sleep period Prof." xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications STA AP ACK data / null awake data / null ACK data / null ACK no more than" xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="max." xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="service period length" xmpDM:startTime="441800" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="802.11" xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- Roaming No or bad connection? Then perform: Scanning scan the environment, i.e.," xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="listen into the medium for beacon signals or send probes into the medium and wait for an answer Reassociation Request" xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="station sends a request to one or several AP(s) Reassociation Response success: AP has answered, station can now participate failure:" xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="continue scanning AP accepts Reassociation Request signal the new station to the distribution system the distribution system updates its data" xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="base (i.e.," xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="location information) typically, the distribution system now informs the old AP so it can release resources May take a long" xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="time … Prof." xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="638200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Faster roaming using 802.11k," xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name=".11r" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="and .11v" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Classical roaming is too slow, e.g.," xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="for VoIP over WLAN  service interruption 802.11" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="authentication message exchange Reassociation messages exchange EAP-request/response identity exchange Access request and challenge packet exchange EAP request/response RADIUS access request/accept" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="exchange Success message to Client Nonce-value exchange Temporal key, acknowledgement exchange In this example 17 steps (all but 7." xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="are exchanges)! See 802.1X" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="for more details about authentication 802.11k:" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Optimized channel list Collect potential roaming networks prior to roaming 802.11r:" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Fast BSS Transition - only 4 steps left Client and AP exchange 802.11" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="authentication messages and nonce-values Client and AP exchange reassociation messages and temporal key/acknowledgment 802.11v:" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="BSS Transition Management Manage information about alternative access points Disassociation Imminent can force client to roam Prof." xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="748600" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="WLAN: IEEE 802.11" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="– some developments 802.11c:" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Bridge Support Definition of MAC procedures to support bridges as extension to 802.1D" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="802.11d:" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Regulatory Domain Update Support of additional regulations related to channel selection, hopping sequences 802.11e:" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MAC Enhancements – QoS Enhance the current 802.11" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MAC to expand support for applications with Quality of Service requirements, and in the capabilities and efficiency of the protocol" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Definition of a data flow (“connection”) with parameters like rate, burst, period… supported by HCCA (HCF (Hybrid Coordinator Function) Controlled" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Channel Access, optional) Additional energy saving mechanisms and more efficient retransmission EDCA (Enhanced Distributed Channel Access): high priority traffic waits" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="less for channel access 802.11F:" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Inter-Access Point Protocol (withdrawn) Establish an Inter-Access Point Protocol for data exchange via the distribution system 802.11g:" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Data Rates &gt; 20 Mbit/s at 2.4" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GHz; 54 Mbit/s, OFDM Successful successor of 802.11b," xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="performance loss during mixed operation with .11b" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="802.11h:" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Spectrum Managed 802.11a" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Extension for operation of 802.11a" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="in Europe by mechanisms like channel measurement for dynamic channel selection (DFS, Dynamic Frequency Selection) and power control (TPC, Transmit" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Power Control) 802.11i:" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Enhanced Security Mechanisms Enhance the current 802.11" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MAC to provide improvements in security." xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="TKIP enhances the insecure WEP, but remains compatible to older WEP systems AES provides a secure encryption method and is" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="based on new hardware Prof." xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="967900" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="WLAN: IEEE 802.11" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="– some developments 802.11j:" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Extensions for operations in Japan Changes of 802.11a" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="for operation at 5GHz in Japan using only half the channel width at larger range 802.11k:" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Methods for channel measurements Devices and access points should be able to estimate channel quality in order to be able" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to choose a better access point of channel 802.11m:" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Updates of the 802.11-2007" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="standard 802.11n:" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Higher data rates above 100Mbit/s Changes of PHY and MAC with the goal of 100Mbit/s at MAC SAP MIMO antennas" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Multiple Input Multiple Output), up to 600Mbit/s are currently feasible However, still a large overhead due to protocol headers and" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="inefficient mechanisms 802.11p:" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Inter car communications Communication between cars/road side and cars/cars Planned for relative speeds of min." xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="200km/h and ranges over 1000m Usage of 5.850-5.925GHz" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="band in North America 802.11r:" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Faster Handover between BSS (“roaming”) Secure, fast handover of a station from one AP to another within an ESS Current" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="mechanisms (even newer standards like 802.11i)" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="plus incompatible devices from different vendors are massive problems for the use of, e.g.," xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="VoIP in WLANs Handover should be feasible within 50ms in order to support multimedia applications efficiently 802.11s:" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mesh Networking Design of a self-configuring Wireless Distribution System (WDS) based on 802.11" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Support of point-to-point and broadcast communication across several hops Prof." xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="999167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="1025500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Current top standard IEEE 802.11ax" xmpDM:startTime="1085267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="– High Efficiency WLAN – marketed as WiFi 6(E) Increased number of non-overlapping channels at 6 GHz Prof." xmpDM:startTime="1085267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1085267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1085267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1085267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="1085267" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Improvements of 802.11ax" xmpDM:startTime="1209567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="over 802.11ac" xmpDM:startTime="1209567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Centrally (AP) controlled MAC with dynamic bandwidth assignment using OFDMA via Resource Units (RU, time-frequency resources, see LTE!) 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xmpDM:name="Dr.-Ing." xmpDM:startTime="1209567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1209567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1209567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="1209567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Data rates for 802.11ax" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Values are for a single spatial stream Depending on number of streams devices with &gt; 10 Gbit/s available Prof." xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications MCS Modulation Coding rate Data rate in Mbit/s per spatial stream Data rate in Mbit/s per spatial stream" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Data rate in Mbit/s per spatial stream Data rate in Mbit/s per spatial stream Data rate in Mbit/s per spatial" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="stream Data rate in Mbit/s per spatial stream Data rate in Mbit/s per spatial stream Data rate in Mbit/s per" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="spatial stream MCS Modulation Coding rate 20 MHz channels 20 MHz channels 40 MHz channels 40 MHz channels 80 MHz" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="channels 80 MHz 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144 2 QPSK 3/4 24 25.8" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="49 51.6" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="102 108.1" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="204 216 3 16-QAM 1/2 33 34.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="65 68.8" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="136 144.1" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="272 282 4 16-QAM 3/4 49 51.6" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="98 103.2" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="204 216.2" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="408 432 5 64-QAM 2/3 65 68.8" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="130 137.6" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="272 288.2" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="544 576 6 64-QAM 3/4 73 77.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="146 154.9" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="306 324.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="613 649 7 64-QAM 5/6 81 86.0" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="163 172.1" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="340 360.3" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="681 721 8 256-QAM 3/4 98 103.2" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="195 206.5" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="408 432.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="817 865 9 256-QAM 5/6 108 114.7" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="217 229.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="453 480.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="907 961 10 1024-QAM 3/4 122 129.0" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="244 258.1" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="510 540.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="1021 1081 11 1024-QAM 5/6 135 143.4" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="271 286.8" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="567 600.5" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="1134 1201" xmpDM:startTime="1395767" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Questions &amp; Tasks Check the differences between WiFi, WMM, … and the 802.11" xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="standard! Why is synchronization needed? What are the negative effects of the power saving mechanisms, what are the trade-offs between" xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="power consumption and transmission QoS? What is the advantage of U-APSD? Why can roaming consume a lot of time? How" xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to speed-up the process? What is left from the distributed WLAN mechanisms when looking at the most current standards? Prof." xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="1472067" xmpDM:duration="1000"/></rdf:li></rdf:Seq>
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                           <rdf:li><rdf:Description xmpDM:name="802.11 - MAC management" xmpDM:startTime="0" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="0" tscDM:imageoffset="0" tscDM:imagerect="0, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Synchronization using a Beacon (infrastructure)" xmpDM:startTime="59933" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="1" tscDM:imageoffset="0" tscDM:imagerect="75, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Synchronization using a Beacon (ad-hoc)" xmpDM:startTime="136967" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="2" tscDM:imageoffset="0" tscDM:imagerect="150, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Power management" xmpDM:startTime="211000" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="3" tscDM:imageoffset="0" tscDM:imagerect="225, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Power saving with wake-up patterns (infrastructure)" xmpDM:startTime="331100" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="4" tscDM:imageoffset="0" tscDM:imagerect="300, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="U-APSD – WMM Power Save" xmpDM:startTime="441800" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="5" tscDM:imageoffset="0" tscDM:imagerect="375, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="802.11 - Roaming" xmpDM:startTime="638200" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="6" tscDM:imageoffset="0" tscDM:imagerect="450, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Faster roaming using 802.11k, .11r and .11v" xmpDM:startTime="748600" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="7" tscDM:imageoffset="0" tscDM:imagerect="525, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="WLAN: IEEE 802.11 – some developments" xmpDM:startTime="967900" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="8" tscDM:imageoffset="0" tscDM:imagerect="600, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="WLAN: IEEE 802.11 – some developments " xmpDM:startTime="999167" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="9" tscDM:imageoffset="0" tscDM:imagerect="675, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="WLAN: IEEE 802.11 – some developments " xmpDM:startTime="1025500" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="10" tscDM:imageoffset="0" tscDM:imagerect="750, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Current top standard IEEE 802.11ax – High Efficiency WLAN – marketed as WiFi 6(E)" xmpDM:startTime="1085267" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="11" tscDM:imageoffset="0" tscDM:imagerect="825, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Improvements of 802.11ax over 802.11ac" xmpDM:startTime="1209567" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="12" tscDM:imageoffset="0" tscDM:imagerect="900, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Data rates for 802.11ax" xmpDM:startTime="1395767" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="13" tscDM:imageoffset="0" tscDM:imagerect="975, 0, 75, 42"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Questions &amp; Tasks" xmpDM:startTime="1472067" tscDM:image="C05_Wireless_LANs-4_Thumbnails.png" tscDM:imageindex="14" tscDM:imageoffset="0" tscDM:imagerect="1050, 0, 75, 42"/></rdf:li></rdf:Seq>
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