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5G adoption is inflicting cellular networks to develop at unprecedented charges. This brings with it vital new enterprise alternatives however can even improve the complexity and value of deployment and operations. An clever, programmable community allows communication service suppliers to reap the benefits of the expansion that 5G presents whereas streamlining their operations to maximise return on funding.
Cisco is addressing these challenges head-on with our industry-leading NCS 500 portfolio. New enhancements allow simultaneous help of each conventional architectures RAN and open, virtualized RAN, with full interoperability.
Challenges for Brownfield Operators
Utilizing an open structure supplies many value advantages to service suppliers, leveraging a Business Off-the-Shelf (COTS) based mostly infrastructure, automation options, and an open ecosystem to advertise a aggressive market.
Whereas it’s comparatively straightforward for greenfield service suppliers to undertake 5G open RAN interfaces and architectures, this can be very tough for brownfield operators who’ve already broadly deployed 4G.
One of many principal challenges for brownfield operators is the shortage of interoperability accessible when utilizing legacy RAN interfaces with an open RAN resolution. Changing all current 4G CPRI radios within the community with eCPRI based mostly radios just isn’t possible, which makes adoption of an open RAN and DU virtualization very tough.
When 4G and 5G are being deployed in the identical cell web site however operating on two totally different architectures (proprietary 4G eNB and virtualized open 5G DU), it’s cost-prohibitive for the supplier.
Brownfield Interoperability
Cisco has been working with numerous Customary Growth Organizations (SDO) to outline an open and absolutely interoperable 5G RAN structure.
By means of collaboration, we have been in a position to create an answer that would seamlessly combine legacy radios on Cisco’s Converged SDN Transport structure, whereas additionally standardizing the specs to make it absolutely interoperable.
As a contribution to the O-RAN ALLIANCE, we drove the creation of an open Fronthaul gateway specification (O-RAN.WG7.FHGW-HRD.0-v02.00) to handle deployment challenges for brownfield suppliers. This specification permits legacy CPRI based mostly radios to speak with open RAN 7.2x eCPRI based mostly DU.
Cisco NCS 540 Fronthaul Routers, a key ingredient to the Converged SDN Transport structure, present an open and programmable resolution to host RAN community capabilities like Fronthaul Gateway (FHGW) and RAN useful resource configuration.
O-RAN PlugFest in India
We have been in a position to reveal this profitable integration in the course of the O-RAN International PlugFest 2021 hosted by Bharti Airtel in India. By means of our multivendor demo, Cisco NCS 540 platform hosted the FHGW community perform supplied by VVDN applied sciences and verified the answer utilizing Keysight Open RAN Studio and Sign Analyzer.
Fig: O-RAN PlugFest demo setup at Bharti Airtel
Cisco’s resolution method is vendor agnostic, serving to service suppliers to consolidate capabilities, optimize community stock, and scale back the price of deployment.
FHGW permits seamless integration of legacy radios to ORAN 7.2x DU enabling operators to undertake ORAN structure for current 4G networks. Though the FHGW is deployed on the cell web site, it may possibly present roughly 9 instances the optimization to move bandwidth in a centralized RAN structure.
Open {hardware} and API definition helps overcome proprietary dependencies of RAN capabilities and permits seamless integration in a multi-vendor setting.
A programmable platform promotes innovation and protects funding. The identical platform will be programmed to perform as a Fronthaul MUX / De-MUX for shared cell deployment.
Joint European O-RAN and TIP PlugFest
Cisco additionally participated within the O-RAN European PlugFest 2021 hosted by TIM OTIC laboratory in Torino, Italy. We have been challenged to construct two end-to-end, interoperability options leveraging multi-vendor O-DU / O-CU radio software program elements and O-RU parts for each 4G (LTE B7) and 5G (n3, n78).
In each instances, the NCS 540 Collection Router was used to offer packet-based fronthaul to attach O-RU to O-DU and to distribute timing and synchronization taken from the TIM community to O-RU utilizing PTP and SyncE protocols based on the O-RAN LLS-C3 mannequin.
We efficiently demonstrated compliance to O-RAN transport traits in multivendor environments together with time synchronization, packet fronthaul, latency and jitter, telemetry, and packet-based fronthaul community automation.
Powering Open, Virtualized RAN in Brownfield Deployments In the present day
As service suppliers proceed to deploy 5G, the advantages of adopting a virtualized RAN have gotten more and more evident. By offering safe and zero-touch infrastructure over a resilient transport structure, we will simplify the deployment of virtualized DU servers at cell websites.
Virtualized infrastructure requires the next interfaces for administration and zero-touch operations:
Out of Band (OOB) interface for server administration and infrastructure onboarding
The administration interface for server, radio, and digital DU OAM
Administration interfaces for Kubernetes or digital machine infrastructure and container administration.
Safe infrastructure utilizing well-defined high quality of service (QoS) is vital to making sure site visitors safety and traceability in a multivendor setting. Cisco NCS 540 Collection Routers are based mostly on confirmed {hardware} and software program, which is critical to offer a safe setting for cell web site virtualization.
A mature QoS structure supplies site visitors separation and outlined service safety. Safe and encrypted algorithms help SSH, AAA, DHCP, ZTP, SNMP, IPv4/IPv6, MACsec, IPsec, gRPC, MPP, and wealthy entry management record options.
Cisco safe zero-touch provisioning allows a safe automation framework not just for the router but additionally for virtualized DU and open Radio deployment on the cell web site.
Programmability and Automation
Cisco presents a versatile and programmable structure that service suppliers can start to reap the benefits of at this time. With wealthy streaming telemetry help, networks will be monitored with streamed configuration and operational telemetry knowledge on a centralized knowledge virtualization device. The platform supplies intensive help for YANG and IETF Fashions, and OpenConfig.
With open administration interfaces and APIs, we will allow end-to-end community administration capabilities by the operational lifecycle of the brownfield cell web site. Cisco presents off-the-shelf and customised Cisco Community Providers Orchestrator (NSO) perform packs to automate the provisioning of every cellular community area together with radio, virtualized capabilities, and transport.
Dedicated to Continued Innovation
Cisco continues to give attention to technological enhancements that may assist brownfield service suppliers scale back deployment prices. By offering a transport infrastructure that’s open, programmable, safe, and verified towards requirements, we’re empowering suppliers to seamlessly undertake virtualization and open, disaggregated RAN options in multivendor environments.
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