In particular, these recommendations define reference synchronization networks, where the synchronization is generated by time synchronization masters or PRTCs, which are typically based on GNSS technology and where the reference timing signal is carried across a network of clocks. This means that a PTP-based solution can also fulfill this requirement. Ericsson’s dual-mode 5G Core is built on cloud-native, microservices-based technology and combines Evolved Packet Core (EPC) and 5G Core (5GC) network functions into a common multi-access and cloud-native platform that supports 5G and as well as previous generations for optimized footprint and TCO efficiency. He is an expert at Ericsson Research working on synchronization and transport solutions. However, to unlock 5G’s full potential NR standalone (SA) and 5G Core (5GC) is needed. in electrical engineering from KTH Royal Institute of Technology, Sweden. The fundamental technologies to address these requirements come from the GNSS, which provides the basic technology for a time synchronization master, enabling global distribution of a UTC-traceable reference. He is currently an active contributor to ITU-T SG15 Q13 (serving as rapporteur) and other relevant synchronization standardization bodies, as well as serving as the chair of the International Timing and Sync Forum (ITSF). Pioneering customers select us as their 5G partner and we are first with commercial live networks in four continents. The synchronization aspects of fronthaul networks are also addressed by the O-RAN Alliance. … Moreover, the time error can be better estimated during holdover, making it possible to take consequent actions per service (TDD, for example). There are no specific synchronization requirements for the CU. This can be done by simply setting API parameters as opposed to running complex network integration projects, allowing for multiple network operations towards IoT devices previously considered impossible or too expensive. Features requiring stricter synchronization are generally implemented between neighboring base stations. allocate margin for cell phase synchronization errors (Tsync). The new 5GC architecture addresses the needs of not just today, but the future – raising mobile communications to unprecedented levels and making it possible to digitalize entire societies. The 3GPP has therefore defined a maximum receive timing difference (MRTD) as a maximum relative receive timing difference the UE must be capable of handling. He also contributes actively to ITU-T SG15 Q13 and IEEE 1588. , Currently, the vast majority of commercial 5G deployments are based on NR non-standalone (NSA) technology which uses existing LTE radio access for signaling between devices and the network, and Evolved Packet Core (EPC) networks which are enhanced to support 5G NSA. The optimal solution for a specific network may depend on existing synchronization feature support of the network and network elements, transport network modernization plans that improve synchronization support, as well as operator preferences. While many applications benefit from accurate time synchronization, it is important to realize that high time accuracy over large areas can be very costly. Figure 4: Recommended synchronization solutions. Alongside 5G new radio (NR), 5G Core is a fundamental cornerstone of 5G networks. TDD cells operating at the same frequency (or adjacent frequencies) in overlapping coverage areas require time domain isolation to prevent base-station-to-base- station and UE-to-UE radio frequency (RF) interference. You’ve probably heard about advanced 5G use cases which, thanks to ultra-low network latency and very high throughputs, will revolutionize businesses and the day-to-day lives of consumers. The MRTD consists of a base-station relative time alignment error (TAE) and an RF propagation delay difference (∆Tprop). For example, synchronous dual connectivity allows an MRTD of up to 33µs, of which 30µs can be allocated for ∆Tprop and the remaining 3µs for TAE. A margin of 400ns is left to the end application to fulfill ± 1.5µs on the radio interface. Verizon’s 5G gets points for speed but knocks for coverage | … Discover more on how our software approach will help you stay competitive. Ericsson's 5G radio prototype, which provides 5G wireless network access, has been widely deployed for real-world testing in the U.S., South Korea, Japan, … The journey to 5G Core makes network insights essential, but the traditional approach to data collection is unsustainable. Services with special accuracy or availability demands should be carefully analyzed to minimize costs. A solution is considered to be RAN based if it can fulfill the synchronization requirements of the RAN network without synchronization support from the transport network. Per the recent collaboration, the 5G data and voice calls were made on Ericsson’s 5G infrastructure and harnessed the next-gen technology of Oppo … This allows a design with independent synchronization references. He has worked with timing and synchronization in the RAN area for 12 years, with a special focus on packet-based methods (PTP and NTP). Get to the core of 5G – a cloud native dual-mode 5G Core that combines EPC and 5GC network functions into a common cloud native platform for efficient TCO and smooth migration to 5G. While the introduction of 5G did not cause any fundamental change to radio network synchronization requirements, some applications may put more stringent local accuracy requirements on the synchronization of the 5G nodes. He joined Ericsson in 2005 and has served as a member of the ORAN Working Group 4 (Open Fronthaul) with standardization since Ericsson joined the ORAN Alliance in 2019. The split option is denominated as 7-2x and it is an intra-PHY split – that is, some parts of the 3GPP PHY layer are implemented in the DU and others in the RU . Several CSPs have partnered with us. The same architecture can also be used to support the industrial application by distributing the timing of the 5G network to the TSN . There are guidelines for this in G.8271.1 . In this new architecture each Network Function (NF) offers one or more services to other NFs via Application Programming Interfaces (API). New network architectures imply new approaches to addressing the various synchronization needs. Examples include time-sensitive networks (TSNs), smart grid applications and the UE device-positioning use case. Distributing time synchronization over the same transport network infrastructure used for user data has the benefits of providing the same level of robustness and redundancy for timing as for the user traffic itself. The recommended solution is to relay timing transparently across the 5G network, where the delay of the TSN-time messages through the 5G network is measured and compensated. The network evolution from EPC to 5G core plays a central role in creating a powerful network platform, capable of being exposed and automated, for service providers to extract more value and become contributors in existing and emerging ecosystems.However, the journey to a full 5G Core will imply a technology shift with the adoption of the new 3GPP defined service-based architecture (SBA) and network functions built on cloud native technology. Learn our smooth and step-wise migration alternatives to 5G Core. History Foundation. Ericsson leads the implementation of 5G worldwide, partly through the use of massive MIMO technology. In 5G networks the situation is different because time and phase synchronization is more often needed compared with previous generations of radio networks, due to factors such as wider use of TDD or the need for coordination between NR and LTE. This message exchange enables the distribution of the time from the PTP grandmaster and estimates the path delay. Modern Slavery Statement | Privacy | Legal | © Telefonaktiebolaget LM Ericsson 1994-2021, 5G synchronization requirements and solutions, Redefine customer experience in real time, Ericsson Technology Review, Critical IoT connectivity: Ideal for time-critical communications, June 2, 2020, Alriksson, F; Boström, L; Sachs, J; Wang, Y.-P. E; Zaidi, Ali, 3GPP technical specification TS 38.133, NR; Requirements for support of radio resource management, 3GPP technical specification TS 38.401, NG-RAN; Architecture Description, 3GPP technical specification TS 23.501, System architecture for the 5G System (5GS), Ericsson Technology Review, 5G-TSN integration meets networking requirements for industrial automation, August 27, 2019, Farkas, J; Varga, B; Miklós, G; Sachs, J, ITU Technical Report TP-GSTR-GNSS – Considerations on the use of GNSS as a primary time reference in telecommunications, 2020, IEEE 1588-2019 – IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, June 16, 2020, ITU-T Recommendations G.826x and G.827x series (G.8200-G.8299: Synchronization, quality and availability targets, 3GPP technical specification TR 38.801, Technical Specification Group Radio Access Network; Study on new radio access technology: Radio access architecture and interfaces, 3GPP technical specification TS 38.104, NR; Base Station (BS) radio transmission and reception, Ericsson white paper, 5G wireless access: an overview, Integrated access and backhaul – a new type of wireless backhaul in 5G, Ericsson white paper, Cellular IoT in the 5G era, the cells must use the same TDD configuration. T-Mobile US, Inc. TMUS recently announced multi-billion-dollar deals with Ericsson ERIC and Nokia NOK to continue expanding its nationwide 5G network. The RANs use different sources, often in combination, to provide synchronization characteristics to match the network use case and services delivered. An efficient synchronization solution that addresses all relevant scenarios requires the support of a toolbox of synchronization methods that are implemented in the RAN domain (GNSS and OAS), the transport domain (such as PTP), or both. A variety of features that benefit from coordinated transmission or receptions from multiple TRxPs have been standardized over the years, all with different purposes and characteristics. This includes industries such as automotive, logistics, public safety, media, and manufacturing. With Ericsson's 5G platform you can: Evolve your network from 4G to … in applied physics and electrical engineering from the Linköping Institute of Technology, Sweden. The time period a clock can remain within the required accuracy depends on the stability of the assisting source. A core network for 5G is more than 5G Core. Prior to 5G, the 3 rd Generation Partnership Project (3GPP) focused entirely on mobile networks. The RU is the main user of synchronization and it may also be synchronized by a timing reference generated directly at the radio site. The ITU-T (International Telecommunication Union Telecommunication Standardization Sector) specification of the primary reference time clock (PRTC) includes the possibility for the PRTC to be synchronized with GNSS. Therefore, the architecture is separated into functional … Ruffini holds a M.Sc. Watch this video for an overview of our multi-access, high-performance and cost-effective core platform for 5G above or explore our assets below to gain more insights. This includes using Precision Time Protocol (PTP) and radio interface-based methods to synchronize distributed radio units in the evolved RAN architecture, where the upper and lower parts of the 5G New Radio (NR) RAN are separated in the different logical units: the centralized unit (CU), the distributed unit (DU) and the radio unit (RU). In Ooredoo Qatar’s network, Ericsson Radio System has facilitated a fast nationwide 5G coverage. TDD radio frames inherently require time and phase alignment between radio base stations, to prevent interferences and related loss of traffic. Explore all of these different areas, that will form the foundation of your cloud-native core network for 5G, and learn what you need to do to prepare them to release 5G’s full potential in your network. Ericsson and BT to deliver dual-mode services using '5G Core' | … Pioneering customers select us as their 5G partner and we are first with commercial live networks in four continents. The solution also includes services exposure capabilities to explore new business opportunities in the industry and in-build software probes and an integrated firewall to increase 5G network security. It enables CSPs to: What can Ericsson dual-mode 5G Core do for you? A method that depends on such a high level of synchronization accuracy would significantly increase the cost of the solution, especially when synchronization to the base stations is distributed over the network. It means that unless carriers install nodes in every lane, street, and neighbourhood, ... Nokia, Ericsson, Samsung, and ZTE sell 5G network chips to carriers to build base stations and carrier nodes. . Read our TCO benefits paper (executive summary) (full version). The requirement on cell phase synchronization is ultimately specified in terms of maximum deviation in relation to a common absolute timing requirement and dividing the requirement by half (±1.5µs, for example). Here's what you need to know, Introduce 5G quickly and effectively while protecting existing services, Have a controlled and smooth migration to 5G aligned to business needs, Address new segments with flexibility and agility, Reduce cost and increase performance with cloud native design, Quickly introduce new functionality and do maintenance updates, Manage traffic growth with CAPEX efficiency, Reduce OPEX and operational inefficiencies, Deployment flexibility and a smooth evolution to 5G, Reduce OPEX in software updates and upgrades with CI/CD. 5G will be offered through 5G towers but not only. It is the first mobile technology designed for machines and systems in addition to people. Allocation of a budget to the different components of the guard period is the result of a trade-off between cost (product and deployment), availability, TDD periodicity and overheads. The tightest requirements should be addressed locally only when and where required. We use Cloud Native technologies and tools to develop our 4G and 5G products on a container-based micro-service architecture. The protocol is based on a two-way exchange of timing messages . Verizon and Sprint share what comes next on their core network transition from 4G to 5G. Knowledge of Transmission servers (M2000, SoEM) & switches. Industrial automation is just one example of a use case that requires accurate timing and is likely to generate additional synchronization requirements in the near future. An important aspect of this is that a base station may use PTP for the delivery of both time synchronization and frequency synchronization. With the advent of 5G, several experts in the industry got together to define how the core network should evolve to support the needs of 5G New Radio (NR) and the advanced use cases to be enabled by it. This paper presents a clear evolution plan for addressing all 5G-IoT use cases, from basic to the most complex, in a cost-efficient, smooth and future-proof way. The DU may be part of the synchronization chain or just a consumer of the synchronization. In this case, the distribution of a single time reference is sufficient. It establishes reliable and secure connectivity to the network and access to its services, determines the quality of service and enforces it through policy allowing services differentiation and handles wide area mobility throughout the network. Synchronization methodologies and architectures applicable to a switched fronthaul have also been covered in G.8271.1 . Guard periods are used for isolation with a configurable total guard time expressed as an integer number of symbols. To meet the TDD “relative” synchronization requirement that cell phase synchronization must be better than 3µs, the accuracy of the time synchronization reference at the input to the base station must always be better than ±1.1µs when measured against a standard time reference. TLS and IPsec, on all interfaces, vendor credentials, HW rooted trust anchors for trusted boot, and signed software to ensure that only software provided by Ericsson can execute on the platform. This is not always the case in real networks due to factors such as different fiber length or the use of different wavelengths in the optical transmission. has worked with timing and synchronization distribution within the RAN base station and with air transmission accuracy for 20 years. In these cases, the delay asymmetries and packet delay variation present in PTP-unaware networks would make it impossible to meet the stringent accuracy and stability requirements. Most of the relevant synchronization requirements are defined by the 3GPP. This Ericsson Technology Review article explains the main categories of 5G synchronization requirements and presents a toolbox of solutions for all relevant scenarios, the most challenging of which can often be addressed within the RAN domain. In early 2018 Ericsson has launched the industry’s first 5G NR-capable ra-dio, called Ericsson AIR 6468. 5G wireless access provides wireless connectivity for a wide range of new applications and use cases. Many of the commercial 5G networks going live around the world today use TDD. From that it was born a new core network 3GPP standard and architecture known as 5G Core (5GC). He holds an M. Sc. In many cases, synchronization in a mobile network will benefit from the implementation of a combination of methods. is an expert in the physical layer of radio access at Business Area Networks, where he is currently focusing on analysis and solutions related to the architecture, deployment and functionality required by 5G RAN. The new 5GC architecture called as Service-Based Architecture (SBA), is built using IT network principles and cloud native technology. Ericsson is a technology leader in 5G. While there is no change to fundamental synchronization requirements in the move from 4G to 5G, wider use of TDD radio technology and growing demand for new network architectures that support demanding 5G use cases have made the need for … This is particularly relevant for cases that require GNSS redundancy (to protect against jamming or spoofing events, for example), where the distribution of timing over the transport network as a complement to a local GNSS receiver should be considered. Some of the most compelling use cases for 5G, including industrial automation, depend on more accurate timing and will likely generate additional synchronization requirements in the near future. For the same delay spread, UE1 and UE4 can tolerate larger TAE than UE2 and UE3. The two main types of synchronization requirements that are relevant for 5G networks are those that depend on the radio network operation and those that depend on the supported services (application-driven requirements). in telecommunication engineering from Sapienza University of Rome, Italy. The strict MRTD, and thereby TAE, relates to features using the same frequencies (like MIMO (multiple-input, multiple-output)) or at adjacent spectrum (like contiguous carrier aggregation) where common or shared functions in the RF chain could cause strict timing dependencies. This results in synchronization requirements in the microsecond range between nodes in the TSN. Accurate and reliable synchronization has long been a fundamental prerequisite for the correct operation of telecommunications networks. Here, Ericsson´s 5G platform plays an instrumental role, in helping you build a better 5G network in a better way. The baseband function in a base station is split into two logical units: a CU hosting the higher-layer protocols and a DU handling the lower layers to the user equipment (UE). Lars Magnus ... mobile switching centers and service application nodes. Ericsson ERIC recently made a significant headway in strengthening its market position in the 5G Enterprise market by acquiring Cradlepoint for an enterprise value of $1.1 billion. Short disruptions due to interference and blocking are common, but the negative impact can be avoided or limited by the base station’s holdover using the local oscillator – up to a few hours for a TDD base station, for example. Industrial automation scenarios often involve multiple timing domains. Total cost of ownership (TCO) is always a hot topic. The distribution of time-phase and frequency synchronization has been addressed in several ITU-T recommendations . Rather, the required TAE would depend on actual deployment, its RF characteristics and the UEs’ relative position between the TRxPs, as shown in Figure 3. To decrease overheads, the emphasis is on striving to keep the guard periods short, while still catering for the desired effects. This includes multiple operators in both the US and South Korea, as well as in Switzerland, Australia and UAE. Telefonica currently offers 5G connectivity to approximately 1,300 towns and cities across the Spain, according to the report. Modern Slavery Statement | Privacy | Legal | © Telefonaktiebolaget LM Ericsson 1994-2021, Redefine customer experience in real time, A multi-access core: Ericsson’s dual-mode 5G Core, New business opportunities with network exposure, Countinuous Integration and continuous deployment, Building a cloud native 5G Core: the guide series, How to integrate packet core firewall in the user plane. In short, 5GC is a fundamental piece of the 5G network to: What are the key characteristics and benefits from 5G Core (5GC) and New Radio (NR) standalone? The duration of the guard period needs to cater for four effects: Since guard periods are not used for communication, they reduce the time ratio when spectrum resources can be used. Ericsson is a technology leader in 5G. Coordination may also occur between NR and LTE. In 3GPP TS 38.104 , the TAE ranges between 65ns to 260ns depending on the feature and on the CP duration but is only valid for colocated/ intra-site deployments where ∆Tprop~0. The time and frequency synchronization distribution can be achieved using a combination of PTP and synchronous Ethernet. Programmability in 5G Core networks has the potential to disrupt today's mobile network business models allowing service providers to expand then offerings to industry 4.0 beyond connectivity.. Ericsson ERIC has secured a five-year 5G core deal from WIND Hellas, covering both the standalone and non-standalone modes of the technology. Specified by IEEE 1588, PTP has been selected by the telecom industry to distribute accurate time synchronization from an accurate master, such as GNSS. The best control over the synchronization network architecture will be achieved by rolling out PTP from the lower part of the transport network, with GNSS receivers and T-GM functionality in base stations or routers, and be extended to include T-GMs that are higher up in the network when feasible. joined Ericsson in 1993. Longer holdover periods can be achieved when GNSS is combined with other technologies that provide a stable timing reference (traceable to PRTC). Spanish operator Telefonica’s 5G network already reaches 80% of the country’s population, local press reported. 5G makes it possible to serve several applications that have previously been supported either by wireline or by non-standard radio technologies, such as Critical Internet of Things (IoT) and Industrial Automation IoT services  for which time synchronization is fundamental. Its importance has grown in 4G, and it will be more important than ever in 5G and future networks. Download your guide to building a cloud native 5G Core. The 5G Core (5GC) is the heart of the mobile network where ultra-connectivity translates into service differentiation and business flexibility. In these cases, it should only be used as an assisting reference in APTS mode for GNSS. In these parts of the network, OAS provides an alternative solution for synchronizing the radio nodes without requiring the support of a transport network. Ericsson estimates the number of subscriptions reaching one billion by the end of 2023. It … It is an evolution of our powerful virtualized portfolio, designed for cloud deployment, consisting of our Cloud Packet Core, Cloud Unified Data Management (UDM) and Policy and Signaling Controller products. For example, 1m corresponds to a synchronization accuracy of around 3ns, which is orders of magnitude more stringent than other radio network synchronization requirements. We have compiled a comprehensive toolbox of synchronization techniques that can be used to provide appropriate frequency synchronization and time alignment of the radio network with minimal disruption. These features and related timing requirements are applicable within a single operator network, and as a result, control of relative time error between antennas used by the feature is sufficient. OAS is based on round-trip time measurement similar to PTP, with the advantage that the asymmetries are generally small over the air, making it possible to achieve good time alignment. MRTD as a fraction of a cyclic prefix (CP). Network synchronization is key to optimal radio network performance. This is because the reduced transient times in NR made it possible to keep the same synchronization requirement with low overhead. Ericsson is a technology leader in 5G. Market insight: Leader in 5G Core? joined Ericsson in 1997 and currently serves as a system developer. What matters is the relative frame timing alignment at the receiver. Ericsson ERIC recently announced that its 5G Radio Access Network and Core products and solutions are driving Orange Spain’s 5G services in Madrid and Barcelona. Authors: Stefano Ruffini, Mikael Johansson, Björn Pohlman, Magnus Sandgren, APTS – Assisted Partial Timing SupportCP – Cyclic Prefix CPRI – Common Public Radio Interface CU – Centralized UnitDL – DownlinkDU – Distributed UniteCPRI – Enhanced CPRI ePRTC – Enhanced Primary Reference Time Clock FTS – Full Timing SupportGNSS – Global Navigation Satellite SystemIoT – Internet of ThingsITU-T – International Telecommunication Union Telecommunication Standardization SectorMRTD – Maximum Receive Timing DifferenceNR – New RadioNTP – Network Time Protocol OAS – Over-the-Air SynchronizationPRTC – Primary Reference Time ClockPTP – Precision Time ProtocolRF – Radio FrequencyRU – Radio UnitRX – ReceptionT-GM – Telecom GrandmasterTAE – Time Alignment ErrorTSN – Time-Sensitive Network/NetworkingTX – TransmissionUE – User EquipmentUL – Uplink UTC – Coordinated Universal Time. TSNs in industrial applications generally require the distribution of time synchronization to the industrial subnetworks used for functionality such as robot control or autonomous vehicles. Some relate to combining spectrum assets, thereby allowing total higher aggregated bandwidth and throughput (carrier aggregation, dual connectivity and so on), while others relate to improving link performance at the cell edge (variants of coordinated multi-point operation, for example). Operational Knowledge of Multi-Vendor transmission Nodes - Ericsson / Nokia / Huawei / Ceragon Telecom equipment. The purpose of the G.8275.1 profile is to meet the highest accuracy, which requires the implementation of an IEEE 1588 telecom boundary clock or telecom transparent clock in every node in the timing distribution network. Some microservices can even be re-used for different NFs, making implementation more effective and facilitating independent life-cycle management – which allows upgrades and new functionalities to be deployed with zero impact on running services. The product, which leverages the Nokia Smart Node portfolio leverages Qualcomm® 5G RAN platform 5G network speeds in the UAE are currently the world's fastest, according to new research by vpnMentor, the world's largest VPN review website. Ericsson is a technology leader in 5G. in electrical engineering from Lund University in Sweden. GNSS satellites visibility is important for proper operation. The 3GPP technical specification TS 23.501  presents an architecture and methods that enable the successful integration of a 5G network into a TSN synchronization network. Where required not only is symmetric applied physics and electrical engineering from the Linköping Institute of technology Sweden... 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Platform plays an instrumental role, in helping you build a better way commercial live networks in four continents and! While maximizing the reuse of existing 4G networks 2018 Ericsson has launched the industry ’ s crucial to deliver customer., while still catering for the CU periods can be achieved using combination. Result in cost-efficient solutions different synchronization topologies no specific synchronization requirements have become... Is combined with other technologies that provide a stable timing reference ( traceable to PRTC ) characteristics match!