Page 102 - Kaleidoscope Academic Conference Proceedings 2020

2020 ITU Kaleidoscope Academic Conference

5.3.2 Evolution of TN Architecture Specification Group Services and System Aspects,
Release 15 Description,” Sep. 2019.
TNs are likely to be multi-administrative, multi-layer and
widely dispersed. A TN has multiple domains, e.g., the [8] GSM Association, “5G implementation guidelines:
domain of different infrastructure providers, the domain NSA Option 3,” Feb. 2020.
of optical and packet layers, and the domain of different
geographical regions. To evolve legacy TNs to T-SDN [9] NGMN Alliance, “5G devices categorization,” Mar.
enabled TNs, the requirements of different domains should 2020.
be met, which can be achieved by adopting a hierarchical [10] GSMA, “5G Spectrum,” Mar. 2020, GSMA Public
architecture for the TN [26, 27], where some domain Policy Position.
SDN-controllers (also called child controllers) manage
devices in their own domains, and a parent SDN-controller [11] GSM Association, “5G implementation guidelines: SA
manages E2E TN. It is advisable to adopt a domain-based Option 2,” Feb. 2020.
TN evolution, which simplifies deployment. In this way, the [12] 3GPP, TS 38.101, “NR; user equipment (UE) radio
first step is to develop a national domain for multiple CN transmission and reception. Part 1: Range 1 standalone
functions and/or multiple data centers. Next, lower layer (Release 16),” Mar. 2020.
domains (i.e., regional and local domains) can be gradually
evolved to be SDN-enabled. For intra-domain evolution, a [13] Huawei, “5G Spectrum,” Feb. 2020, Public Policy
suitable deployment approach (greenfield, mixed, or hybrid) Position.
can be adopted, taking into account existing TN facilities. [14] 3GPP, TS 38.300, “5G NR overall description: Stage-2,
Release 16,” Mar. 2020.
6. CONCLUSION AND LESSONS LEARNED
[15] S. Perrin, “5G Transport Networks: Heavy Reading
We presented a practical and comprehensive approach for the Operator Survey & Analysis,” Heavy Reading, Nov.
deployment of future networks (5G and beyond) by explaining 2018.
the end-to-end 5G architecture. Our emphasis was on [16] NGMN, “NGMN Overview on 5G RAN Functional
cost-effective scenarios to expand existing facilities that can Decomposition,” NGMN Alliance, Final Deliverable,
also be used in 5G networks via simple software upgrades. In 2 2018, version 1.0.
doing so, we presented different deployment choices for RAN,
TN, and CN that take into account implementation time, [17] ITU-T, GSTR-TN5G, “Transport network support of
costs, existing infrastructure and other technical issues. As an IMT-2020/5G,” 2018.
important lesson, ensuring 5G compatibility in expanding the [18] H. Son, “Comparison of commercial 5G network
existing facilities via simple software upgrades is emphasized. architecture: KT vs. SK Telecom,” Netmanias, Mar.
Acknowledgment: This work was supported in part by 2019.
Mobile Communications Company of Iran (MCI).
[19] Ericsson, “Ericsson microwave outlook,” Dec. 2018.
[20] ETSI GS mWT 002, “millimetre Wave Transmission
REFERENCES
(mWT): Applications and use cases of millimetre wave
[1] M. Series, “IMT vision–framework and overall transmission,” Aug. 2015.
objectives of the future development of IMT for 2020 [21] ETSI GR mWT 015, “Frequency Bands and Carrier
and beyond,” ITU Recommendation, pp. 2083–0, 2015. Aggregation Systems: Band and carrier aggregation,”

[2] ETSI, GR MEC 017, “Mobile Edge Computing (MEC): Nov. 2017.
Deployment of mobile edge computing in an NFV [22] GSMA, “Mobile backhaul options: Spectrum analysis
environment,” ETSI Group Reports, 2018. and recommendations,” Sep. 2018.

[3] ETSI, “Next generation protocols (NGP): An example of [23] 3GPP TR 38.801, “Technical Specification Group Radio
a non-IP network protocol architecture based on RINA Access Network. Study on new radio access technology:
design principles,” ETSI Group Reports, Feb. 2019. Radio access architecture and interfaces,” Mar. 2017.
[4] 3GPP, TS 23.501, “System architecture for the 5G [24] G. Brown, “Cloud RAN & the Next-Generation Mobile
system (5GS): Concepts and requirements, Release 16,” Network Architecture,” Heavy Reading, Apr. 2017.
Mar. 2020.
[25] ONF, “Migration Use Cases and Methods,” Feb. 2014.
[5] R. Li, “Network 2030: Market drivers and prospects,”
in Proc. 1st ITU Workshop on Network 2030, 2018. [26] ONF, TR-522, “SDN Architecture for Transport
Networks,” Mar. 2016.
[6] GSM Association, “Road to 5G: Introduction and
Migration,” Apr. 2018. [27] ITU-T, G.7702, “Architecture for SDN Control of
Transport Networks,” Mar. 2018.
[7] 3GPP, “3GPP TR 21.915 V15.0.0 Technical

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