DOCOMO's 5G Network Deployment Strategy

DOCOMO’s 5G Network Deployment Strategy Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Contents Chapter 1: 5G delivers high speed and large capacity using new spectrum Chapter 2: 5G deployment in 4G bands Chapter 3: To realize low latency Chapter 4: DOCOMO’s 5G network deployment strategy 1Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Chapter 1: 5G delivers high speed and large capacity using new spectrum Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. What is 5G? The 5th generation mobile communication system: Offers 3 key properties High speed, large capacity Max. transmission bit rate: 20Gbps 5G 1.7Gbps 4G 4G/eLTE 10ms 105 Massive device connectivity No. of simultaneously connectible devices: Low latency Transmission latency in radio interface: 1ms 106 devices/km2 * The numbers above are the target performance defined in technical standard 3Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. and do not represent the performance delivered at the time of 5G launch. New Spectrum Allocation New 5G spectrum allocated to Japanese carriers ＜3.7GHz band＞ ＜4.5GHz band＞ Bandwidth: 100MHz /slot Bandwidth: 100MHz /slot Rakuten Mobile <ul style="display: flex;"><li style="flex:1">KDDI </li><li style="flex:1">SoftBank </li><li style="flex:1">KDDI </li></ul><ul style="display: flex;"><li style="flex:1">DOCOMO </li><li style="flex:1">DOCOMO </li></ul><ul style="display: flex;"><li style="flex:1">3600 </li><li style="flex:1">3700 </li><li style="flex:1">4100 </li><li style="flex:1">4500 </li><li style="flex:1">4600[MHz] </li></ul>＜28GHz band＞ Bandwidth: 400MHz/slot DOCOMO <ul style="display: flex;"><li style="flex:1">Rakuten Mobile </li><li style="flex:1">KDDI </li><li style="flex:1">Local 5G </li><li style="flex:1">SoftBank </li></ul><ul style="display: flex;"><li style="flex:1">29.1 </li><li style="flex:1">29.5 </li></ul>[GHz] <ul style="display: flex;"><li style="flex:1">27.0 </li><li style="flex:1">27.4 </li><li style="flex:1">27.8 </li><li style="flex:1">28.2 </li></ul>4Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Why 5G Can Deliver High Speed & Large Capacity? 5G can deliver high speed and large capacity because a wider channel bandwidth is allocated in the new frequency bands. Channel bandwidth 28G 400MHz bandwidth 4.5G 3.7G 100MHz bandwidth 100MHz bandwidth 3.5GHz 3.4GHz 5G uses frequency bands that can secure a wider channel bandwidth compared to the frequency bands assigned for 4G, which enables faster speeds and larger capacity! 2GHz 1.7GHz 1.5GHz New frequency bands 4G bands 800MHz 700MHz 5Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. (Ref) Relation between Bandwidth and Speed (Illustrative) Wider road width allows more cars to travel simultaneously. New frequency bands for 5G 4G bands 6Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Radio Characteristics of New Frequency Bands More costs and longer time needed for coverage expansion in higher frequency bands. Breadth of coverage (illustrative) <ul style="display: flex;"><li style="flex:1">Frequency band </li><li style="flex:1">Characteristics </li></ul>Signals difficult to reach (Strong rectilinear propagation) 28GHz 400MHz bandwidth New spectrum 4G bands Sub6 100MHz bandwidth (3.7/4.5GHz) 40MHz bandwidth 3.4GHz 3.5GHz 40MHz bandwidth 15MHz bandwidth 2GHz 1.7GHz 1.5GHz 800MHz 700MHz Signals easier to reach 20MHz bandwidth 15MHz bandwidth 10MHz bandwidth 10MHz bandwidth 7Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Chapter 2: 5G Deployment in 4G Bands Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. 5G Deployment in 4G Bands : Overview With the revision of ministerial ordinance, etc., by the MIC, it is now possible to use 4G spectrum for 5G. The idea can be brought into reality by converting part of the multiple 4G bands into 5G use. 5G 4G 5G（Band converted from 4G use) 4G 4G 4G 4G 9Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Benefits of 5G Deployment in 4G Bands Leads to proliferation of services that take advantage of 5G’s low latency and other characteristics over a broad coverage. ⇒DOCOMO also supports the new arrangement. Full exploitation of 5G’s high speed, large capacity and other properties 5G(new band） Enables offering low latency, etc., over a broad coverage 5G(new band） 5G (4G band) 4G 10 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Difference from 5G Deployed in New Bands Speeds are limited to a level only comparable to 4G as the channel bandwidth remains unchanged. Impossible to deliver superior speeds and capacity that can be realized by the new frequency bands. 5G deployed in new bands <ul style="display: flex;"><li style="flex:1">4G </li><li style="flex:1">5G deployed in 4G bands </li></ul>5G （New frequency bands） 5G (Band converted from 4G use) 4G 4G 4G 4G 4G 4G 4G 4G 11 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. (Ref) FY2019 Effective Speed Survey Results DOCOMO’s PREMIUM 4G service offers Japan’s fastest speeds! <ul style="display: flex;"><li style="flex:1">Download </li><li style="flex:1">Upload </li></ul>(Mbps) <ul style="display: flex;"><li style="flex:1">600 </li><li style="flex:1">100 </li></ul>50 0 300 229 【Legend】 33 Maximum value 136 Upper quartile 123 19 17 Median value Lower quartile Minimum value 0DOCOMO ドコモ SoftBank ソフトバンク SoftBank ソフトバンク au DOCOMO ドコモ au ◆Measurements were performed in accordance with the “Effective Speed Measurement Method of Internet Connection Services Provided by Mobile Telecommunications Carriers” set forth by the Ministry of Internal Affairs and Communications. Data of other carriers were derived from their respective corporate web sites (as of Mar. 31, 2020). The values in the graphs represent the aggregated measurement results for Android and iOS devices. The expression “Japan’s fastest” is based on the comparison of median values. ◆◆For details concerning the measurement method, including the dates and locations of measurement, please see the materials published by each carrier. 12 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Necessity of User Protection in 5G Deployment “5G deployed in 4G band” and “5G deployed in new band” should be distinguished in area maps and informed to users. <ul style="display: flex;"><li style="flex:1">When color-coded by speed </li><li style="flex:1">When not color-coded by speed </li></ul>High speed and large capacity Speed is comparable to 4G because I’m in 5G coverage! ⇒Risk of misleading representation 5G using new band (High speed, large capacity) 5G using 4G band (Speed comparable to 4G) 4G 5G using either new band or 4G band 4G 13 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Risks Associated with 5G Deployment in 4G Bands Potential decline of 4G users’ communication speeds 4G frequency band 4G subscriber 5G subscriber Reduction of spectrum assigned to 4G users <ul style="display: flex;"><li style="flex:1">4G </li><li style="flex:1">4G⇒5G </li></ul>⇒ Potential drop in speed 14 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Spectrum Congestion Status Users’ usage status also needs to be taken into consideration when using 4G spectrum for 5G. <ul style="display: flex;"><li style="flex:1">2019 </li><li style="flex:1">2020 </li></ul>202x Bandwidth in frequency band: 3G/4G 150MHz Use for 5G Bandwidth in frequency band: 600MHz 5G 15 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Chapter 3: To Realize Low Latency Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Article on Low Latency (Excerpt) General perception that 5G will bring about low latency High speed, large capacity 5G 1.7Gbps 4G/4eGLTE <ul style="display: flex;"><li style="flex:1">10ms </li><li style="flex:1">105 </li></ul>Low latency Massive device connectivity Transmission latency in radio interface: 1ms 17 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. What is Latency? It is the time required from data request to first data arrival. Internet Internet Point of interface Content server Radio Smartphone Transmission equipment Switch Packet switching sp mode equipment base station Radio signal ⇔ electric signal conversion Internet connection Transmission & reception of signals Request Arrival XX m sec ←Latency Large amount of latency could hinder the use of content that require real-time immediacy 18 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. To Realize Low Latency It is necessary to achieve low latency in the entire network including the fixed-line sections <ul style="display: flex;"><li style="flex:1">Latency in radio section </li><li style="flex:1">Latency in fixed-line section </li></ul>Latency determined by the physical distance between base station and server Transmit network Network equipment Internet Server In case content server is located in Tokyo, Accesses made from Okinawa have larger latency, with a large amount of latency in the fixed-line section Content server @Tokyo 19 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Can 5G Deployed in 4G Bands Realize Low Latency? Just using 4G spectrum for 5G does not realize low latency for the whole network configuration <ul style="display: flex;"><li style="flex:1">Latency in radio section </li><li style="flex:1">Latency in fixed-line section </li></ul>Transmit network Network equipment Internet Server 5G deployed in 4G band Ingenuity to reduce latency in fixed-line section is also needed 20 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Low Latency Enabling Technology: MEC Realize low latency by placing the server (i.e. destination of connection) closer <ul style="display: flex;"><li style="flex:1">Latency in radio section </li><li style="flex:1">Latency in fixed-line section </li></ul>Latency determined by the physical distance between base station and server Transmit network Network equipment Internet Server The shorter the distance, the lower the latency *MEC: Abbreviation for Multi-Access Edge Computing 21 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Slicing Enabled by 5GC* Slicing technique enables flexible provision of 5G’s low latency and other properties at individual application/service level Service that requires large capacity 5GC Large-capacity slice Internet (Logical network) Video content server, etc. Low-latency slice (Logical network) Application that requires low latency MEC server, etc. *5G-Core: 5G Core network equipment 22 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. DOCOMO’s 5G Network Deployment Strategy Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Recap of Chapters 1-3 • 5G delivers high speed and large capacity through the use of new spectrum • “5G deployed in 4G bands” can provide broad coverage, but speeds will be limited to 4G level • To realize low latency, ingenuity in overall network configuration is required • Unique properties of 5G can be provided flexibly through slicing supported by 5GC 24 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. DOCOMO’s 5G Network Deployment Strategy ① Expand coverage of high speed and large capacity services using new spectrum ② Promote low latency across the entire network ③ Flexible service provision based on demand using 5GC (Also study deployment of 5G in 4G bands) 25 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. High-Speed, Large-Capacity Coverage Expansion Using New Bands First, actively deploy “5G using new frequency bands” that can deliver high speeds and large capacity Development rate of 5G infrastructure maintenance: 20,000 97.0% base stations 10,000 500 cities base including all government- designated cities 47 stations 150 prefectures locations across Japan 500 base stations Mar. 31, 2020 <ul style="display: flex;"><li style="flex:1">Jun. 30, 2020 </li><li style="flex:1">Mar. 31, 2021 </li><li style="flex:1">Jun. 30, 2021 </li><li style="flex:1">Mar. 31, 2022 </li><li style="flex:1">Within FY2023 </li></ul>26 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Accelerate Realization of Low Latency in Entire NW Configuration Started provision of cloud service offering MEC features that can deliver low latency required for the 5G era Launched cloud service that delivers low latency Internet Dispersedly DOCOMO installed across network Japan Base station Services solutions <ul style="display: flex;"><li style="flex:1">Video distribution </li><li style="flex:1">Remote operation </li></ul><ul style="display: flex;"><li style="flex:1">Image/face recognition </li><li style="flex:1">Gaming </li></ul>27 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Transition from NSA to SA Evolution to SA (Stand Alone) to begin in the future with the introduction of 5GC <ul style="display: flex;"><li style="flex:1">Internet </li><li style="flex:1">Internet </li></ul>EPC 5GC 5G <ul style="display: flex;"><li style="flex:1">4G </li><li style="flex:1">5G </li></ul>base station base station base station 5G(SA) 5G (NSA) 4G *NSA: Non-Stand Alone 28 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved. Society to be Realized by SA Society in which services that take advantage of 5G’s unique properties are provided in a flexible manner ⇒ Study coverage rollout using 5G deployment in 4G bands Stadium solution Telemedicine/diagnosis High speed, large capacity, low latency High speed, large capacity, low latency Smart agriculture Massive device connectivity Ultra-dense/ high traffic High speed, large capacity Smart manufacturing Massive device connectivity Smart city High speed, large capacity, massive device connectivity 5G coverage 29 Copyright ©2020 NTT DOCOMO, INC. All Rights Reserved.

DOCOMO's 5G Network Deployment Strategy

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