Core Technology for the Wireless Network Virtualization
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1 Core Technology for the Wireless Network Virtualization May 23, 2011 Gahee Jo
2 Contents 2 Introduction Virtualization Wireless Network Virtualization Wireless Network Structure Evolution Core technology DU-RU separation GPP-based baseband processing platform Cognitive Radio RU ; stratified H/W design
3 Introduction Virtualization "a technique for hiding the physical characteristics of computing resources. includes making a single physical resource appear to function as multiple logical resources a server, an operating system, an application, or storage device include making multiple physical resources appear as a single logical resource. storage devices or servers
4 Introduction Necessity (Problems) Variety wireless network coexistence Increase rapidly traffic Next generation network technology Increase CAPEX and OPEX Increase data-charge Un-satisfy user desires Solution ; Wireless network virtualization Physical concentration Logical flexibility Easy evolution
5 Wireless Network Structure evolution Current Structure Variety wireless network coexistence Variety H/W and S/W coexistence Connection : Core Network, Internet OPEX (estate rental, electric rates) CAPEX (H/W addition and change) inefficient
6 Wireless Network Structure evolution
7 Wireless Network Structure evolution MSR(Multimode Standard Radio) 3GPP standard Equipment DU(Digital Unit) RU(Radio Unit) Interface CPRI(Common Public Radio Interface) MSR structure Frequency band change : New RU H/W Network evolution and extension : DU channel card change, S/W upgrade RNC function : DU and CN (S/W)
8 Wireless Network Structure evolution CR(Cognitive Radio)-SDR(S/W Defined Radio) Structure RU : LNA, Filter S/W upgrade << frequency DU : Cognitive Engine addition dynamic system resource and wireless radio resource allocation << user demand
9 Core Network 1) DU-RU separation 2) GPP-based baseband processing platform 3) Cognitive Radio 4) RU ; stratified H/W design
10 1) DU-RU separation CPRI protocol frame User Plane Data : sampling signal of wireless signal Information transmission : IQ Data Control & Management Data : DU-RU control information Urgent information : L1 in-band Protocol General information : Ethernet and HDLC Synchronization : time, frame L1 in-band Protocol :Layer1 link setup and information transmission
11 1) DU-RU separation CPRI protocol Collect DU 6 Data Rate 614.4Mbps~ 6,144Mbps Optical signal of DU-RU Interface Gigabit Ethernet NIC convey in a Baseband signal process
12 2) GPP-based baseband signal processing platform Cloud Computing System dynamic signal processing resource allocation System extension : equipment change DU plus GPP-based Cloud Computing System Reduce CAPEX and OPEX Economies of scale GPP : General Purpose Processor
13 2) GPP-based baseband signal processing platform Economic efficiency Increase clock speed NASA, SGI, Intel : 10PetaFLOPS(2012) IBM : 20PetaFLOPS(2011) 1exaFLOPS(2019) Improve CPU technology Reduce cost per gigaflops
14 2) GPP-based baseband signal processing platform Core-based Virtualization Signal and protocol processing Alternative to reduce clock speed Physical Layer Processing Parallel processing, multi-core allocation MAC/RLC/RRC protocol Processing 1 core per cell or user Uplink, Downlink
15 3) Cognitive Radio
16 3) Cognitive Radio proper load distribution >> dynamic resource allocation REM(Radio Environment MAP) : Wireless Characterization, Policy Cognitive Engine : feedback-based network management form network or User
17 3) Cognitive Radio Network structure, type of data transmission on bandwidth demand reduce CAPEX(<<On-Demand) and OPEX (<<energy saving)
18 4) RU ; stratified H/W design RU Installation on the Radio Top Decrease cost to rent place Avoid power and signal loss from feeder Stratified structure << Variety frequency coexistence << Many RU >> PA(power amplifier) efficiency improvement Low heat, scalability Easily interface with DU and optical fiber equipment
19 Thank you for attention!
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