Benchmarking Methodology Working Group LM. Contreras Internet-Draft J. Rodriguez Intended status: Experimental L. Luque Expires: January 9, 2020 Telefonica July 8, 2019 5G transport network benchmarking draft-contreras-bmwg-5g-00 Abstract New 5G services are starting to be deployed in operational networks, leveraging in a number of novel technologies and architectural concepts. The purpose of this document is to overview the implications of 5G services in transport networks and to provide guidance on bechmarking of the infratructures supporting those services. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. 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Expires January 9, 2020 [Page 1] Internet-Draft 5G transport network benchmarking July 2019 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Conventions used in this document . . . . . . . . . . . . . . 2 3. 5G services . . . . . . . . . . . . . . . . . . . . . . . . . 2 4. Benchmarking aspects of transport networks in 5G . . . . . . 3 5. Guidance on 5G transport benchmarking . . . . . . . . . . . . 4 6. Security Considerations . . . . . . . . . . . . . . . . . . . 4 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 4 9.1. Normative References . . . . . . . . . . . . . . . . . . 4 9.2. Informative References . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction 5G services are starting to be introduced in real operational networks. The challenges of 5G are multiple, impacting in different technological areas such as radio access, mobile core and transport network. From all those technological areas, the transport network is the focus of this document. It is important for operators to have a good basis of benchmarking solutions, technologies and architectures before moving them into production. With such aim, this document intends to overview available guidelines to assist on the benchmarking of 5G transport networks, identifying gaps that could require further work and details. As result, it is expected to provide guidance on benchmarking of 5G transport network infrastructures ready for experimentation in lab environments or real deployment in operational networks. 2. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC2119 [RFC2119]. 3. 5G services 5G transport networks will need to accommodate different kind of services with very distinct needs and requirements leveraging on the same infrastructure. 5G services can be grouped in three main Contreras, et al. Expires January 9, 2020 [Page 2] Internet-Draft 5G transport network benchmarking July 2019 categories, namely enhanced Mobile Broadband (eMBB), ultra-Reliable and Low Latency Communications (URLLC), and massive Machine Type Communications (mMTC). Each of them presents different inherent characteristics spanning from ultra-low latency to high bandwidth and high reliability. For instance, eMMB services are expected to provide peak bit rates of up to 1 Gbps, uRRLC services will require latencies as lower as below microsecond delays, and mMTC will demand to support up to 100 times the number of current sessions. All these features impose great constraints to the networks deployed today in backhaul and aggregation, in terms of not only network capacity but also in terms of data processing, especially for guaranteeing very low latencies. The impact in the transport network of those challenges is increased by some other additional challenges introduced by the emergence of two new technological paradigms: the network virtualization and the network programmability. In one hand, virtualization will introduce uncertainty on the traffic patterns due to the flexibility and scalability in the deployment traffic sources in the transport network. On the other hand, programmability will potentially enable automated reconfiguration of the transport network which requires coordination mechanisms to avoid misconfigurations. A final consideration is the introduction of the network slicing concept in 5G networks. According to that, the objective is to provide customized and tailored logical networks to different customers, allocating resources for the specific customer service request. 4. Benchmarking aspects of transport networks in 5G The benchmarking aspects of 5G transport networks can be then structured in the following manner: Data plane benchmarking: aspects to consider in data plane benchmarking refer to both hardware capabilities as well as to transport encapsulations. Examples of hardware capabilities are recent developments such as IEEE TSN, and example of encapsulation is SRv6 [I-D.ietf-spring-srv6-network-programming]. Control plane benchmarking: aspects to consider for control plane relates to transport infrastructure programmability. In this case some previous works exists such as RFC8456 [RFC8456]. Contreras, et al. Expires January 9, 2020 [Page 3] Internet-Draft 5G transport network benchmarking July 2019 Management plane benchmarking: one specific aspect of management benchmarking in 5G refers to the capability of managing the transport network slice lifecycle. Architecture benchmarking: new architectural frameworks are being conceived to support advanced services like 5G. An example of these architectures is [I-D.ietf-detnet-architecture]. 5. Guidance on 5G transport benchmarking To be completed. 6. Security Considerations This draft does not include any security considerations. 7. IANA Considerations This draft does not include any IANA considerations 8. Acknowledgements This work has been partly funded by the European Commission through the H2020 project 5G-EVE (Grant Agreement no. 815074). 9. References 9.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . 9.2. Informative References [I-D.ietf-detnet-architecture] Finn, N., Thubert, P., Varga, B., and J. Farkas, "Deterministic Networking Architecture", draft-ietf- detnet-architecture-13 (work in progress), May 2019. [I-D.ietf-spring-srv6-network-programming] Filsfils, C., Camarillo, P., Leddy, J., daniel.voyer@bell.ca, d., Matsushima, S., and Z. Li, "SRv6 Network Programming", draft-ietf-spring-srv6-network- programming-01 (work in progress), July 2019. Contreras, et al. Expires January 9, 2020 [Page 4] Internet-Draft 5G transport network benchmarking July 2019 [RFC8456] Bhuvaneswaran, V., Basil, A., Tassinari, M., Manral, V., and S. Banks, "Benchmarking Methodology for Software- Defined Networking (SDN) Controller Performance", RFC 8456, DOI 10.17487/RFC8456, October 2018, . Authors' Addresses Luis M. Contreras Telefonica Ronda de la Comunicacion, s/n Sur-3 building, 3rd floor Madrid 28050 Spain Email: luismiguel.contrerasmurillo@telefonica.com URI: http://lmcontreras.com/ Juan Rodriguez Telefonica Zurbaran, 12 Madrid 28010 Spain Email: juan.rodriguezmartinez@telefonica.com Lourdes Luque Telefonica Zurbaran, 12 Madrid 28010 Spain Email: lourdes.luquecanto@telefonica.com Contreras, et al. Expires January 9, 2020 [Page 5]