| RadioNode
Radio Transmission and Cellular Backhaul Solution
RadioNode is a highly integrated Multi-Protocol solution targeting radio transmission and cellular backhaul applications. It supports traditional SONET/SDH linear and ring architectures as well as emerging packet rings. RadioNode is equipped with multiple voice, leased line and data service interfaces such as 10/100 Ethernet, Gigabit Ethernet, SPI-3 co-processor, DS1/E1, and DS3/E3. The SONET/SDH interfaces support redundant OC-3 or STM-1 lines. Data mapping, such as Ethernet over SONET/SDH (EoS), is supported through Virtual Concatenation (VCAT) with Link Capacity Adjustment Scheme (LCAS), with simultaneous use of mixed High Order (STS/VC paths) and Low Order (VT/VC paths).
Interfaces
- Equipment / client side:
- Up to 2 Gigabit Ethernet via GMII
- Up to 8 Ethernet / Fast Ethernet via SS-SMII
- OIF compliant SPI-3 connection to packet co-processor
- 28 x DS1/E1
- 3 x DS3/E3
- STS-3/AUG-1 Telecom Bus
- Line / trunk side
Applications
Features
- Dual SONET/SDH line interface supporting 0:2, 1+1 and 1:1 linear APS, High and Low Order UPSR/SNCP and Resilient Packet Rings
- Full SONET/SDH Transport Overhead (TOH) processing, with configurable serial extraction and insertion of full TOH or only DCC portion
- SONET/SDH High and Low Order path termination
- TU-3/TUG-3 and TUG-2/TUG-3 support
- Serial POH extraction and insertion
- SPI-3 co-processor port supporting Layer 2/3 packet processing
- Connection to Ethernet ports and SONET/SDH data encapsulation channels
- Supports RPR, client aggregation, Class of Service
- Flexible mapping of data signals into any Contiguous or Virtual Concatenation of VT1.5/STS-1/STS-3c or VC-12/VC-3/VC-4 containers
- Simultaneous use of Ethernet ports and SPI-3 data channels
- Packet encapsulation using GFP, X.86 LAPS and RFC1662 PPP
- Simultaneous High and Low Order Virtual Concatenation with optional LCAS support per group
- Up to 500 µsec differential delay compensation with internal buffer, or up to 250 msec with external SDRAM
- Flexible mapping of PDH client signals into any VT1.5/STS-1 or VC-12/VC-3 containers
- Per-channel mixed mapping of up to 28 DS1s or E1s into SONET or SDH
- Per-channel mixed mapping of up to 3 DS3s or E3s into SONET or SDH
- Single M13/E13 multiplexer for DS1/E1 to DS3/E3 to STS/VC mapping
- 155 Mbps Telecom Bus interface for connection to supplemental mappers
- Simultaneous support of all services up to 2 x 155 Mbps aggregate rate
- Generic 16-bit microprocessor interface
Block Diagram

Description
With DS1/E1, DS3/E3 and Ethernet client interfaces, a packet co-processor port, flexible mapping, and redundant SONET/SDH line interfaces supporting linear and ring based optical networks, RadioNode integrates the technologies necessary to meet the requirements of next generation radio transmission and cellular backhaul applications.
RadioNode supports full low and high order mapping and processing for complete network ADM configurations. HDLC and GFP (Generic Framing Procedure) encapsulation along with Virtual Concatenation (VCAT) and LCAS (Link Capacity Adjustment Scheme) enable the efficient delivery of Ethernet and other data services. The packet co-processor port provides the flexibility to support the evolution of packet grooming and aggregation and packet based transport networks such as Resilient Packet Rings.
Next-generation SONET/SDH generally refers to the capability of SONET/SDH to efficiently transport packet based payloads which do not directly align to the native capacities of SONET/SDH containers via GFP, VCAT and LCAS. GFP is an ITU-T standard for mapping of frame/packet data into SONET/SDH payloads. Virtual Concatenation part of the SONET/SDH standard which allows for the native 1.5 Mbps, 2 Mbps, 50 Mbps, and 150 Mbps payload containers to be bonded together into a single transport channel for more efficient transport of packet technologies such as Ethernet/Gigabit Ethernet. LCAS is an ITU standard which defines a protocol used to increase or decrease the number of containers bonded together with VCAT without affecting service.
Radio Transmission Applications
RadioNode brings all of the well-known benefits of SONET/SDH available in wireline applications today to radio networks. Time-tested carrier-grade features such as reliability, efficiency, protection, performance monitoring, and topology flexibility make SONET/SDH the transport protocol of choice for wireline and radio applications alike. SONET/SDH capable radio transmission products allow service providers to leverage their vast knowledge and experience with their wireline transport networks in offering their services over radio links. These products also allow a mix of radio and wireline links to be used together to form a SONET/SDH ring network. LCAS can be used to split Ethernet traffic across two unprotected radio links allowing 311 Mbps bandwidth to be achieved while still avoiding loss of service in the event of single link failures
While most radio products today are focused on transporting traditional TDM signals (e.g. DS1/E1), there is a clear need to evolve these products to include Ethernet transport. RadioNode is a highly integrated ASSP using next-gen SONET/SDH features such as GFP (Generic Framing Procedure), VCAT (Virtual Concatenation) and LCAS (Link Capacity Adjustment Scheme) to enable efficient simultaneous multiplexing of Ethernet/Fast Ethernet, Gigabit Ethernet, DS1/E1 and DS3/E3 signals. Telecom bus and SPI-3 client interfaces provide complete flexibility for addition of other types of TDM or packet traffic.
Cellular Backhaul Applications
Cellular service providers are upgrading their radio access networks to provide more IP/packet services for their customers. As bandwidth between cell towers and RNC/BSC is increased to enable these packet services two major changes to the radio access network are occuring. The first is the installation of fiber to replace current copper facilities. The second is the use of Ethernet instead of ATM as the layer 2 protocol of choice
Fiber has multiple advantages over copper facilities in this application including increased bandwidth and increased immunity to lightning strikes. The transition from ATM to Ethernet is part of a network wide shift toward Ethernet based infrastructure and like any transition will result in both technologies co-existing for some time. Therefore, the resulting upgraded backhaul network needs to be equally capable of transporting DS1/E1 and Ethernet. The ideal protocol for multiplexing these signals onto a common signal in a carrier-grade environment is SONET/SDH. Support for ring topologies allows efficient connection of cell towers to share overall bandwidth of the SONET/SDH network and reduced number of ports at the RNC/BSC when aggregating traffic from multiple cell towers
Radio Transmission and Cellular Backhaul Solution

For more sample solutions, please visit our solutions catalog.
For more information on the RadioNode device, please contact your Galazar Networks Sales representative at http://www.galazar.com/contact/sales.html.
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