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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other
•IP Routing/Switching, MPLS, IP QoS –DiffServ•GTP-U/UDP (UMTS)•GRE Tunneling, User Plane PPP Termination, UDP/IP header compression, IP-In-IP Tunneling for Mobile IP support (CDMA2000)•RTP/UDP
• Inter-working Solutions•UTOPIA (Cell Bus) or GbE interface to other sub-systems like DSP and Radio Network Layer
•Radio/Core Network Inter-working & Iu Framing & User Plane Protocols (UMTS)
•AAL2-SSSAR to UDP/IP IWF (CDMA2000)
•Voice over AAL2/ATM to Voice over RTP/UDP/IP
•AAL5/ATM to GbE (GigaBit Ethernet)
•AAL5/ATM to POS (Packet over SONET)
Slide 6
C-Port Network Processor for 3G Infrastructure: Key Drivers
? Higher Bandwidth/Throughput requirements? E.g. Peak Data rate as high as 3.1 Mbps in case of 1xEV-DV
? Higher Scaling Requirements? Increased number of Voice/Data Calls/Sessions to to be supported.? Introduction of Concurrent Services I.e. support for Simultaneous Voice &
Data Calls.
? Migration from Circuit to Packet Switched Backhaul? Use of IP & ATM as a transport protocols? Necessity of value added features such as QOS, Security, Header
Compression etc. at wireline speed.
? Flexibility? Migration from one transport to another transport interface in future, without
requiring significant Hardware Changes.? Flexibility of migration to higher speed transport interfaces (such as Fiber
Optic etc.) in future, without requiring significant Hardware Changes.
Slide 7
C-Port NP Based RNC SolutionA Case Study
Slide 8
RNC - Functional BlocksRNC needs multi-board solution for scalability & performance and the major sub-systems include -
•Transport Network Interface•ATM based transport: OC-3c ATM, AAL2, AAL5•IP based transport: OC-3c ATM-AAL5, Fast/Gig Ethernet, IP, UDP, GTP-U•Iu/Iub/Iur Framing
•Transport Network Layer Control•AAL2 Signaling (ALCAP) & respective bearer stacks on Iub, Iur & Iu interfaces
•Radio Network Layer Control•NBAP, RNSAP, RANAP & respective bearer stacks for Iub, Iur & Iu interfaces
•Radio Interface•MAC, RLC, PDCP, RRC
•Interconnect to connect the sub-systems•PCI, Fabric with FPGA (Glue), Ethernet
Slide 9
RNC Solution with Motorola ProcessorsReference Architecture
GRE/PPP Interface towards SDU and IP Interface towards the Core network
Slide 19
PDSN Application - FeaturesA C-Port NP based solution for the bearer plane functionality of PDSN
? GRE Tunneling (RFC 2784 & 2890 )? GRE Checksum support? GRE Key Support? No support for GRE Sequence Number required for packet reordering
? User Plane PPP-IP Termination ? Byte Synchronous HDLC Like Framing with 16/32 bit FCS support (RFC 1662)? Control Character (PPP Flag & Escape Sequence ) Transparency (Sec 4.2 RFC1662)? IP Encapsulation & De-capsulation (without supporting IP Fragmentation & Reassembly & IP
Header Options processing) (RFC 791)? No support for PPP Frame Reassembly
? R-P Interface? Half Rate Full Duplex GbE with GMII Interface to PHY (802.3)? IP Host Behavior
? Core Interface? Half Rate Full Duplex GbE with GMII Interface to PHY (802.3)? IP Router Behavior
? Scalability? support for 30K subscriber I.e. 30K parallel GRE Tunnels and their associated PPP Sessions
? Performance? 144 Kbps of throughput per user with 3K Active User I.e. 144 Kbps x 3K = ~450 Mbps of
Quick prototype and verification using simulator for projecting cycle time budgets
High speed interfaces like FP , GbE/FE etc. for exchanging the bearer & using PCI for control plane interfacing
Scripts for testing on simulator. Use CDS/C5 as load tester
•Cycle Time budget–Ingress/Egress port speed (e.g. OC3/12, GbE etc.)–Throughput requirements (in terms of PPS)
•External Interfacing–Supporting high throughput requirement.
•Testing–Non-availability of test tools
System modeling through initial prototypes. Effective usage of simulator for verifying the model & other results
•Functional Partitioning & Efficient/Optimal usage of NP resources–Usage of NP resources (I.e. CP’s, TLU, Bit/Byte processor etc.) – Memory constraints (code & data memory)
Slide 22
GSG-India: C-Port Solution Provider
MIEL: A New Smart Networks Alliance Member Providing Design Services for the C-Port Network Processor FamilyMIEL, Motorola India Electronics Pvt. Ltd., part of Motorola's Global Software Group (GSG) is based in India and is a premier provider of software solutions and services to Motorola customers worldwide. The company has extensive experience in developing application software for the C-Port family of network processors.
MIEL offers the following services: •Enhancement and customization of CST reference applications •Sub-system solutions development, including control plane stack software and its integration with applications running on the C-Port family of network processors •Development of automated test solutions (for example, MIEL is currently developing a C-Ware™ Development System (CDS)-based solution for testing wireless Node B devices)