Unified 2G/2.5G/4G LTE Network

Unified 2G/2.5G/4G LTE Network

RK Telesystem offers Intel-based software defined radio ( SDR from SS7ware) , which can be configured as 4G LTE eNodeB or 2.5G GSM/GPRS BTS+BSC via software to operate LTE and/or GSM operational network anywhere anytime.It contains both the radio and baseband functions.It has a maximum output power of 20 Watts RMS for LTE or GSM operation.It can be software-configured for up to 4-TRX/ARFCN, with a simple software change.SDR from SS7ware replaces special-purpose equipment consisting in BBU (baseband unit)-RRU (remote radio unit) setups with lightweight, commodity hardware.

2.5G BTS


GSM Core

4G LTE Core

 2.5G BTS

SDR from SS7ware advantages

  • Longer life cycle and upgradability to yet unknown protocols
  • Less expensive network management
  • Support for multiple protocols from one radio, even at the same time
  • Faster upgrades to new protocol releases
  • Very low power consumption compare with conventional base stations
  • Works with any IP backhaul connectivity (IP radio, microwave, VSAT, fiber, 3G/UMTS)
  • Brings flexibility in managing the network functions and its capacity remotely.
  • The software-defined approach leads to major costs reductions for equipment
  • Better radio performance. SDR systems can implement more complex algorithms that FPGAs
    • Amplifier linearization
    • Better demodulators
    • Smarter frequency resuse
    • More capacity in the same spectrum,more range and coverage

RK BTS uses SDR from SS7ware on commodity hardware instead of special-purpose FPGA or DSP boards, reducing the size, cooling and shelter requirements and power consumption of the BTS, resulting in lower civil infrastructure costs.Unifying the Base Transceiver Station (BTS) and the Base Station Controller (BSC) eliminates the costly Abis interface for traffic and signalling.

Our complete software-defined mobile network solution relies on using the RK BTS/RK ENB together with SS7ware Core Network.Our RK Unified Core Network implements the functions of both GSM/GPRS and LTE core networks and can be used to build new, mixed 2G/4G networks, or can be integrated in existing deployments.Our RK BTS is an intelligent radio access network component communicating directly with our unified core network to simplify the network infrastructure.RK BTS performs all the functions of the BSC and partially of the MSC (Mobile Switching Center) and the SGSN (Serving GPRS Support Node) – mobility, power and frequency management, handover.For handover, RK BTS contains the IP list of all the neighboring RK BTS units. The RK base stations use the SIP protocol to transmit between each other the frequency, the Base Station Identity Code (BSIC) and the Cell-ID of each base station, since the architecture does not included BSCs.The RK BTS integrates a parts of the MSC and the SGSN, any custom features at BSC-MSC level (such as local call switching and local IP access) can be supported.With no BSC, scalability of the core can be easily achieved because each RK BTS can communicate, at any point, with any unified core in the network.RK BTS reduced idle traffic and latency requirements make satellite backhaul feasible.

SDR based RK BTS

SDR based Unified Core for 2.5G/4G LTE


RK BTS Features and benefits

  • Software configurable as 4G LTE or 2.5G GSM/GPRS.
  • Software upgradable to LTE and LTE-A Releases.
  • Can be used with any IP backhaul.
  • Local break-out of GPRS and LTE IP traffic for edge computing.
  • Local media routing for GSM speech calls.
  • GSM backhaul loading as little as 8 kbit/sec/call.
  • Can be powered from solar panels in most parts of the world.
  • Linux-based OS means lower management costs.

RK BTS GSM Specifications ( SDR from SS7ware)

Radio interfaceSoftware configurable GSM for 1- 2- or 4-TRX
Operating bandsGSM850 EGSM900 DCS1800 PCS1900
Supported servicesSpeech (GSM-FR) SMS USSD GPRS
Call capacity7 FR calls/TRX
GPRSMultislot classes 1-9, CS-1 & CS-4, NMO 1-3
Network interfaceIPv4; IPv6
Network protocolsSIP/RTP; GTP
Receive sensitivity< -108 dBm
Output power20 W
Multi-TRX supportup to 2 W/TRX in 2- or 4-TRX mode

RK BTS LTE Specifications( SDR from SS7ware)

Radio interfaceLTE Release 11, FDD, 64-QAM; upgradable to 256-QAM with Release 12
Available bands1, 2, 3, 5, 8, 9, 20, others on request
Operating bandwidth1.4, 2, 5, 10, 15, 20 MHz
MAC specslocalized or distributed VRBs, proportional fairness scheduling
Maximum connected UEsno fixed limit
Antenna configuration1×1 (SISO)
Network interfaceIPv4; IPv6
Network protocolsS1-AP; GTP; X2
Output power20 W

Hardware Specifications

Power supply-48 VDC internally regulated, 120 W max, 80 W typical
Network interface100/1000 Ethernet, 2 x RJ-45 connectors
Enclosure50cm x 21cm x 11cm
EnvironmentalIP-67; -20°C to +50°C operating

Operation & Management Specifications

Management interfacesSSH console, CLI, Web GUI
Performance measurementsvia FTP, as per 3GPP 32.425
Operating systemLinux, RPM-based

Unified EPC/IMS Core Network ( SDR from SS7ware)

We offer unified core network solution intended for new LTE networks, for upgrading GSM/GPRS networks to LTE or for extending existing LTE networks.This software-defined core implements all the functions and protocols of the LTE core network in software, and uses commodity hardware. It integrates the EPC layers – MME, S-GW, P-GW, PCRF, and PCEF.It also includes the IMS layers for VoLTE – P-CSCF, I/S-CSCF, IWF, and BGW.It communicates with the RK ENB (LTE eNodeB module) over S1AP and GTP protocols and uses a JSON API for configuration and management.

Unified GSM/GPRSCore Network

Our unified core also implements the functions and protocols of GSM/GPRS core networks. In GSM/GPRS,it acts as a MSC/VLR/SGSN/GGSN/GMSC in a single server. It connects to the RK BTS (GSM module) over GTP and SIP, replacing the costly SS7 MAP-A interface (BSSAP protocol). This leads to a higher return on investment without affecting the reliability of the network or the provided services.

The unified core network solution is based on replacing the eNodeB with the ENB (LTE) and the base station subsystem with the BTS (GSM).

Remote access for operations and management

It is easy to operate and manage remotely using the Mobile Management Interface (MMI) online. The interface makes it accessible to add a new unified core unit, to setup a cluster of multiple core, to configure a single unified core function (MSC/VLR, GMSC, SGSN, GGSN, SGW or PGW), to configure unified core equipment with all its GSM/GPRS/LTE functions and more. With MMI operators can remotely manage their entire network equipment using a single web interface.

Unified Core Features and benefits

  • Runs on commodity hardware, allowing for a simplified network architecture and lower deployment costs.
  • Enables carriers to deploy LTE networks with reduced initial investment.
  • Allows for scaling as you go. You can add more servers or separate the functionality as more users adopt your service.
  • Increases network resiliency; in case of equipment failure you can easily configure another server to take up the functions of the fault node.
  • The SIP protocol establishes connection between the unified core and the RK BTS, allowing the base station to communicate with any unified core in the network. A Base Station Controller (BSC) is not needed between the RK BTS  and the RK unified core..
  • Has low idle traffic, which allows transport technologies like satellite.

Software Specifications ( SDR from SS7ware)

SS7 connectivity– SIGTRAN, SCTP with CRC checksum
– M2UA, M2PA, M3UA
– ITU MAP v3
– CAMEL phase 2
Voice interconnect– SIP and RTP
– ISUP using external MGCP gateway
– E.214 (ITU) translation table
– E.164
– Supported operations:
– MSC <-> AuC messages (authentication)
– MSC <-> EIR messages (equipment identification, optional)
– VLR <-> HLR messages (location management, roaming)
– MSC <-> SMSC messages (SMS)
– S1AP r11
– GTP v1, GTP v2
– Supported operations:
– SGSN <-> AuC messages (authentication)
– SGSN <-> EIR messages (equipment identification, optional)
– SGSN <-> HLR messages (data mobility management, roaming)
– SGSN <-> GGSN messages (data session)
– ENB <-> SGSN messages (LTE control and user data)
– BTS <-> SGSN messages (GPRS control and user data)
SIP– Supported standards (RFC3261)
– Registrar function
– B2BUA for calls
– RTP (RFC3550) with sideband DTMF (RFC2833)
– SMS and USSD over IP
SMS– Format: SMS PDU (MO and MT)
– MAP/SS7 transport (T-PDU format)
– SIP MESSAGE transport (SMS over IP, R-PDU format)
CDR– File format
– Rotation interval
– File transfer: FTP
Interfaces– C Interface (MAP, HLR <-> GMSC)
– D Interface (MAP, HLR <-> VLR)
– E Interface (MAP, MSC <-> MSC)
– F Interface (MAP, MSC <-> EIR)
– G Interface (MAP, VLR <-> VLR)
– SIP, RTP (YateBTS <-> VLR)
– S1 Interface (S1AP & GTP, YateENB <-> EPC)
– Gi Interface (IP, connects to Public Data Network)
– Gn/Gp Interface (GTP, SGSN and GGSN)
– Gr Interface (MAP, SGSN <-> HSS)
– Gc Interface (GTP or SS7/MAP, interface to HLR) (optional)
CODECS and transcoders– G.711a, G.711u
– GSM-FR 06.10
– iSAC
– iLBC
Operating systemLinux based

Hardware Specifications

Dell PowerEdge R4303.5″ Chassis with up to 4 Cabled Hard Drives
ProcessorIntel Xeon E5-2630 v3 2.4GHz,20M
Memory8GB RDIMM, 2133MT/s, Dual Rank, x8 Data
Hard drives1TB 7.2K RPM SATA 6Gbps 3.5in Cabled Hard
Hard drive configurationRAID 1 for H330/H730/H730P (2 HDDs) with Cabled Chassis
Internal controllerDVD ROM SATA Internal for 4HD Chassis ReadyRails Sliding Rails With Cable
Power supply550W
Network adapterIntel Ethernet I350 DP 1Gb Server Adapter, Low Profile