信息论基础与编码 (7).ppt

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1、 信息论的辅导材料CONTENTSCONTENTSWhat is 5GUse cases and requirements of 5GKey technologies of 5GMaking 5G a realityWhat does 5G bringWireless Edge and AIWHAT IS 5GWHAT IS 5GROADMAP OF WIRELESS COMMUNICATION1G-2G Analog communication to Digital communication2G-4G Voice service to mobile broadband4G-5G Smart

2、phones to Smart thingsA UNIFYING CONNECTIVITY FABRIC FOR FUTURE INNOVATIONS5G will provide diverse use cases,e.g.the traditional public networks,private networks,massive IOT,extreme broadband,smart transportation,fixed wireless access,indoor enterprise.5G will touch all aspects of our life,e.g.preci

3、sion agriculture,real-time shipping,smart logistics,autonomous driving,immersive commerce,collaborative workspace,flexible manufacturing,drone delivery,immersive entertainment and sustainable society.USE CASES AND USE CASES AND REQUIREMENTS OF REQUIREMENTS OF 5G5GThree typical usage scenarios of 5G:

4、enhanced mobile broadband(eMBB),massive machine-type communications(mMTC),ultra-reliable low-latency communications(URLLC).Each driving a very diverse set of requirementslEMBB is to provide high data rates for mobile users(up to 1G bits per second),lURLLC puts an emphasis on the reliability and late

5、ncy for mission-critical services such as vehicular network and industry automation(the reliability and latency are respectively in the orders of 99.999%and milliseconds).lMMTC focuses on the number of connected machine-type devices in IoT(up to 1 million wireless connections per kilometer square).5

6、G WILL ADAPT TO A WIDE RANGE OF REQUIREMENTSFASTER,BETTER MOBILE BROADBANDMonthly global mobile data traffic in 2024:136B Gigabytes；Mobile broadband Over 100 x growth in mobile data traffic from 2013 to 2021；In 2024,75%of mobile data traffic from multi-media creation&consumptionIn 2024,25%of mobile

7、data traffic will be carried by 5G networks 1.3x more than 4G/3G/2G traffic todaySource:Cisco Visual Networking Index:Global Mobile Data Traffic Forecast(Feb17)ULTRA RELIABLE LOW LATENCY COMMUNICATION The 5G system should be able to provide 10 ms E2E latency in general 1 ms E2E latency for URLLC(Ult

8、ra Reliable Low Latency Communication).TIME LINE OF 5G SPECIFICATIONS AND COMMERCIALIZATIONKEY TECHNOLOGIES KEY TECHNOLOGIES OF 5GOF 5GDESIGNING A UNIFIED,MORE CAPABLE 5G AIR INTERFACE 5G is a platform for future innovation;5G will natively support all different spectrum types;p Below 1 GHz:longer r

9、ange for massive Internet of Thingsp 1 GHz to 6 GHz:wider bandwidths for enhanced mobile broadband and mission criticalp Above 6 GHz,e.g.mmWave:extreme bandwidths,shorter range for extreme mobile broadband 5G will enable different deployments and topologies.5G NR mmWave support nx10 Gbps transmissio

10、n;5G NR Sub-6 GHz and LTE coverage support nx1 Gbps transmission;Ubiquitous support Gbps transmission.5G WILL ENABLE DIFFERENT DEPLOYMENTS5G ARCHITECTUREp5G architecture-SDN/NFV architecture covering aspects ranging from devices,(mobile/fixed)infrastructure,network functions,value enabling capabilit

11、ies pAll the management functions to orchestrate the 5G system.pAPIs are provided on the relevant reference points to support multiple use cases,value creation and business models.5G NETWORK SLICES IMPLEMENTED ON THE 5G NETWORK SLICES IMPLEMENTED ON THE SAME INFRASTRUCTURESAME INFRASTRUCTUREpSeamles

12、s and flexible management of physical and virtualized resources across the three tiers.pAgile end-to-end service orchestration for each respective service vertical,where each vertical may have multiple service instances.pEnabling end-to-end connectivity services to each service instance,which is als

13、o programmable.pScalable OFDM based air interface:,.pFlexible slot based Framework:Low latency,URLLC,forward compatibility.pAdvanced channel coding:Support large data blocks,reliable control channel.pMassive MIMO:Large#of antennas to increase coverage/capacity.pMobile mmWave:For extreme capacity and

14、 throughput.KEY TECHNOLOGIES OF 5G RADIO ACCESS NETWORKSSCALABLE OFDM-BASED 5G NR AIR INTERFACESCALABLE 5G NR OFDM NUMEROLOGYEXAMPLES The period of symbols are up to the propagation delay in different coverage ranges.As the sub-carrier spacing increases,the number of slots in a subframe increase,the

15、refore increasing the number of symbols sent in a given time.FLEXIBLE SLOT-BASED 5G NR FRAMEWORK Scalable slot durationForward compatibilitySelf contained slot structureNominal traffic puncturing5G NR FLEXIBLE FDD SLOT STRUCTUREDELIVERING LOW LATENCY,EXTENDED COVERAGE,AND FORWARD COMPATIBILITYADVANC

16、ED ME-LDPC1 CHANNEL CODING IS MORE EFFICIENT THAN LTE TURBO CODE AT HIGHER DATA RATESHigh efficiencySignificant gains over LTE Turboparticularly for large block sizes suitable for MBBLow complexityEasily parallelizable decoder scales to achieve high throughput at low complexityLow latencyEfficient e

17、ncoding/decoding enables shorter transmission time at high throughputSelected as 5G NR eMBB data channel as part of 3GPP Release-15PERFORMANCEGAINSOFCRC-AIDEDPOLARCHANNELPERFORMANCEGAINSOFCRC-AIDEDPOLARCHANNELCODINGLEDTOITSADOPTIONACROSSMANY5GNRCODINGLEDTOITSADOPTIONACROSSMANY5GNRCONTROLUSECASESCONT

18、ROLUSECASES5GNROPTIMIZEDDESIGNFORMASSIVEMIMO5GNROPTIMIZEDDESIGNFORMASSIVEMIMOKEY ENABLER FOR USING HIGHER SPECTRUM BANDS,E.G.4 GHZ,WITH EXISTING LTE SITESNEWFRONTIEROFMOBILEBROADBANDNEWFRONTIEROFMOBILEBROADBANDMOBILIZINGMOBILIZINGMMWAVEMMWAVEWEAREOVERCOMINGTHEMOBILEMMWAVEWEAREOVERCOMINGTHEMOBILEMMWA

19、VECHALLENGECHALLENGEPROVING THE SKEPTICS WRONG ABOUT MMWAVE CAN NEVER BE USED FOR MOBILEMOBILIZINGMMWAVEWITH5GNRMOBILIZINGMMWAVEWITH5GNRTECHNOLOGIESTECHNOLOGIESKEY PROPERTIES FOR ROBUST MMWAVE OPERATION IN A NLOS MOBILE ENVIRONMENTVery dense network topology and spatial reuse(150-200m ISD)Fast beam

20、steering and switching within an access pointArchitecture that allows for fast beam switching across access pointsTight integration with sub-6 GHz(LTE or NR)Significant 5G NR mmWave outdoor coverage via co-sitingSignificant 5G NR mmWave outdoor coverage via co-sitingSimulations based on over-the-air

21、 testing and channel measurementsULTRAULTRARELIABLELOWLATENCYRELIABLELOWLATENCYCOMMUNICATIONCOMMUNICATION(URLLC)(URLLC)URLLC:99.9999%reliabilitySpatial diversity is essentialCoordinated multi-point(CoMP)provides spatial diversity with high capacityCoMP enabled with dense deployment of small cells wi

22、th high bandwidth backhaulOther diversity limitedFrequency diversity does not address RF blockage/shadowingTime diversity limited as ultra low latency dictates timingWHAT IS POSSIBLE WHEN NOT CONSTRAINED BY EXISTING RULES?MAKING 5G MAKING 5G A A REALITYREALITY2019 is the beginning of a new era for m

23、obile communications,with 5G NR launches across the globe starting in the first half of the year.5G will bloom up the applications of IoT,cloud sevices,Virtual Reality and artificial intelligence.After one year of the announcement of 5G standards,operators and OEMs pave the way of the 5G placement T

24、remendously.In June,2019,China government issues 5G license.30+devices scheduled to launch in 2019The 5G opportunity will be massive,e.g.5G R&D,system prototypes5G modems5G RF solutions(sub-6 GHz,mmWave)5G platforms and reference designsCONSUMER SURVEY CONSUMER SURVEY WHAT DOES WHAT DOES 5G 5G BRING

25、BRING5GWILLSIGNIFICANTLYENHANCETHEAPP5GWILLSIGNIFICANTLYENHANCETHEAPPEXPERIENCEEXPERIENCEVSVS4G4G5GNRisexpandingtonewusecasesandverticals5GNRisexpandingtonewusecasesandverticalsEXPANDINGEXPANDINGOUREMBBSOLUTIONOUREMBBSOLUTIONBEYONDTHEBEYONDTHESMARTPHONESMARTPHONEEXPANDINGMMWAVEEXPANDINGMMWAVEINDOORS

26、,PUBLIC/PRIVATEINDOORS,PUBLIC/PRIVATENETWORKSNETWORKSEMERGINGDEDICATEDEMERGINGDEDICATEDPRIVATENETWORKSPRIVATENETWORKSFORTARGETEDNEEDSFORTARGETEDNEEDSWIRELESS EDGE WIRELESS EDGE AND AIAND AIAI OFFER NEW CAPABILITIES TO ENRICH OUR LIVESToday,more intelligence is moving to end devices,and mobile is bec

27、oming the pervasive AI platform.Many companies envision making AI ubiquitousexpanding beyond mobile and powering other end devices,machines,vehicles,and things.Central Cloud:Big data,AI training,less delay sensitive content,storage.Edge cloud:at Base Station,compute，processing，control Intelligent eq

28、uipment：sensing，processingShould we deploy AI on the embedded device or rather rely on AI services deployed in remote,highly-scalable,ultra-fast computers in the cloud or data centers?Benefits of the Wireless Edge include:Privacy sensitive data that does not leave devicesReliability short distance b

29、etween the transmitter and the receiver assure the high link qualityImmediacy processing without cloud assistanceEfficiency on-device refinement of raw dataPersonalization private on-device learningEdge cloud could be located as close as possible to the devices and users to realize the low latency n

30、eeded for some applications.It could be distributed deeper in the network,farther from the devices for latency tolerant services,depending on the use case,economics,and performance tradeoffs.Wireless edge Drives the best possible on-device capabilitiesOn-premise control for ultra-low latency in the

31、reconfigurable factoryOn-car intelligence for immediacy,edge cloud e.g.for local HD mapsDistribute processing across device and edge cloud for boundless XRNew services through distributed/split functions over 5G Content/control closer to user for instant access,real-time online gaming,etcOn-device virtual assistant for privacy and personalization assistance from cloudTHANKS FOR YOUR LISTENING!ANY QUESTION?