Couple of talks by NTT Docomo on 5G and Beyond (pre-6G)

The Japanese operator, NTT Docomo is a very bold MNO. Not only do they do interesting research but they are very open about what they have been doing and share it publicly. For example, last month they announced development of a safe, blade-free drone propelled by Ultrasonic Vibrations (tweet). This was just amazing as it has a potential to use drones in many new areas where the conventional drones are deemed too dangerous. This is why I was very pleased to see couple of talks by Docomo available online.

The first one is by Takehiro Nakamura, SVP and General Manager of the 5G Laboratories in NTT DOCOMO, Inc. at the 6G Summit in Finland. Slides available here. Video embedded below




The next one is by Seizo Onoe, Chief Technology Architect, NTT DOCOMO, INC. and President, DOCOMO Technology, Inc. from Brooklyn 5G Summit. Unfortunately the slides are not shared but the video is worth a watch below.

3G4G Small Cells Blog: NTT Docomo's Underground LTE Small Cells with possibility to deploy 5G in future - https://t.co/9Ud6FyqcFz #SmallCells pic.twitter.com/GOlpih2RmY

— Zahid Ghadialy (@zahidtg) April 14, 2018

Related Posts:

• NTT Docomo's Green Base Stations
• Nice short articles on 5G in 25th Anniversary Special NTT Docomo Technical Journal
• Terahertz and Beyond 100 GHz progress
• 100 Gbps wireless transmission using Orbital Angular Momentum (OAM) multiplexing
• Examples of 5G Use Cases & Applications
• Telus says 5G is just another 'G' (#5GJAG)
• Sprint Keynote from #B5GS 2019 - Power of Massive MIMO and Band 41 5G NR
• China Telecom: An examination of the current industrial trends and an outlook of 6G

Bandwidth Part (BWP) in 5G New Radio (NR)

I made a short tutorial explaining the concept of Bandwidth Part in 5G a while back. Slides and video embedded below.

Intermediate: Bandwidth Parts (BWP) from 3G4G

Further Reading:

• Understanding 5G New Radio Bandwidth Parts - Keysight
• 5G/NR - Carrier Bandwidth Part - ShareTechNote
• 5G NR Bandwidth Part (BWP) - TechPlayOn

Presentations on Macro Cells and Millimetre-wave Technology from recent CW (Cambridge Wireless) events

CW (Cambridge Wireless) held a couple of very interesting events from 2 very popular groups.

The first one was on "5G wide area coverage: macro cells – the why and the how". This event looked at the design and optimisation of the macro cell layer and its role within future heterogeneous networks. You can access the presentations for limited time on CW website here.

The presentations available are:

• Macro Cell developments that support LTE evolution and 5G deployments by Colin Bryce, Commscope
• Review of current macro network site types and design by Andy Sutton, British Telecommunications
• Smart rollout to maximise ROI by Mike Page, Radio Design
• Strategic planning: an overview of the role of the macro cell by Iris Barcia, Keima
• How massive MIMO can deliver the promise of new 5G Radio Networks by George Grayland, 5GFutures

Related posts that may be of interest:

• Keima: Automated 4G / 5G HetNet Design
• Prof. Andy Sutton: 5G Radio Access Network Architecture Evolution - Jan 2019
• #CWHeritage Talk: The history of synchronisation in digital cellular networks

Commercialising millimetre-wave technology - Presentations from @cambwireless #CWRadioTech event last week available now: https://t.co/PJbrBiJ8UR #4G #5G #Spectrum #Frequencies pic.twitter.com/6naiUSK1qw

— 3G4G (@3g4gUK) May 21, 2019

The second one was on "Commercialising millimetre-wave technology". The event reviewed the commercial opportunities at millimetre-wave frequencies, what bands are available and what licensing is needed. You can access the presentations on CW website for limited time here.

The presentations available are:

• ‘Measurements, Modelling and Testing Millimetre Wave Communication Systems’ by Mark Beach, University of Bristol (Communication Systems & Networks Research Group)
• The Design of a Plastic Packaged Front-end IC for mmWave 5G by Liam Devlin, Plextek RFI
• Design Considerations for the Realisation of Cost-Effective, High-Performance mmWave PCBs by James Henderson, Plextek
• Millimetre wave wireless for improved wireless connectivity in Transport by Mark Barrett, Blu Wireless Technology
• Unlicensed, unlimited: 60GHz mmWave’ by Paul Morris, CCS
• Millimetre-Wave Circuit Simulation Challenges’ by David Morris, Keysight Technologies
• Use Cases & Enabling 5G NR Technologies by Mark Beach, University of Bristol (Communication Systems & Networks Research Group)
• Whitepaper by Paul Holes, Anritsu

We recently made a video to educate people outside our industry about non-mmWave 5G. It's embedded below.

VoLTE Hacking

The 10th Annual HITB Security Conference took place from the 6th till the 10th of May 2019 in The Netherlands. The theme for the conference this year is 'The Hacks of Future Past'. One of the presentations was on the topic 'VoLTE Phreaking' by Ralph Moonen, Technical Director at Secura.

The talk covered variety of topics:

• A little history of telephony hacking (in NL/EU)
• The landscape now
• Intercepting communications in 2019
• Vulnerabilities discovered: some new, some old
• An app to monitor traffic on a phone

The talk provides details on how VoLTE can potentially be hacked. In a lot of instances it is some or the other misconfigurations that makes VoLTE less secure. One of the slides that caught my attention was the differences in VoLTE signaling from different operators (probably due to different vendors) as shown above.

Anyway, I am not going into more details here. The presentation is available here.

Another interesting talk from #HITB2019AMS:
"VoLTE Phreaking"https://t.co/KSMLen6Yb6 [PDF] pic.twitter.com/KakJMGCcVk

— Enno Rey (@Enno_Insinuator) May 9, 2019

The thread in the Tweet above also provided some good references on VoLTE hacking. They are as follows:

• ERNW: Security Analysis of VoLTE, Part 1
• ERNW: Denial of Service attacks on VoLTE
• ERNW: VoLTE Security Analysis, part 2
• ERNW: IMSecure – Attacking VoLTE (and other Stuff)
• ERNW White Paper: Practical Attacks on VoLTE and VoWiFi

Related Posts:

• 3G4G: Voice in 4G: CSFB, VoIP & VoLTE

When will 2G & 3G be switched off now that 5G is here?

I wrote this blog post '2G / 3G Switch Off: A Tale of Two Worlds' back in Oct 2017. Since then I have continued to see the same trend in 2G/3G shutdown announcements. Based on that post and also taking the GSMA Mobile Economy Report into account, we have created a short tutorial on 2G/3G switch off and how the trends are affected by the launch of KaiOS based Smart Feature phones. Presentation and video embedded below. Would love to hear your thoughts.

Beginners: When will 2G & 3G be switched off now that 5G is here? from 3G4G

Related posts:

• Operator Watch Blog: Swisscom launched 5G Fast and 5G Wide
• The 3G4G Blog: 2G / 3G Switch Off: A Tale of Two Worlds
• The 3G4G Blog: Can KaiOS accelerate the transition from 2G / 3G to 4G?

China Telecom: An examination of the current industrial trends and an outlook of 6G

Last month I posted about the slides and videos from 6G Wireless Summit. Some of the videos were added later on. The presentation by Dr. Qi Bi, President of China Telecom Technology Innovation Center and the CTO of China Telecom Research Institute, was not shared but the video of the talk is available and it is quite insightful.

Of the many gems from the talk, I wanted to highlight couple of things. One was the ARPU, that Dr. Bi pointed out has remained the same, regardless of the technology. The other being 5G performance targets, some can be achieved, some are achievable at a price and some are just not achievable. This should be taken into account while designing 6G.


Let me know what you think

Related posts:

• Slides and Videos from the 1st 6G Wireless Summit - March 2019

Examples of 5G Use Cases & Applications

I recently did another 5G training for CW (Cambridge Wireless) & UK5G. One of the sections in that was about Use Cases. A very common questions that people ask is what can 5G do that 4G can't. The answer frankly is sometimes not very straightforward.

#5G teacher extraordinaire @zahidtg from @Parallel_tw is back in action today with his popular #CWTechTrain "An Advanced Introduction to 5G". Spaces are still available for CW's next training day on #IoT (29 May) - find out more here: https://t.co/FBMECW88ge pic.twitter.com/DtMqttefg1

— Cambridge Wireless (@cambwireless) May 2, 2019

While you can get a very high speed and very reasonable latency 4G system, it's not necessarily a commonplace. Similarly 5G is a bit over-hyped. There is a lot of potential in the technology but the theory may not translate into practice. Take for example millimeter wave. There is a large amount of bandwidth that can be available to each operator in this spectrum. The laws of physics however restrict how far mmWave can travel and also the fact that mmWave does not penetrate through glass, walls, etc. Does that mean that an indoor 5G system would be required to complement an outdoor one? Would Wi-Fi be able to complement cellular in-building? There are many unanswered questions at the moment.

There is also the debate around 5G icon displayed on your smartphones. When you see 5G, would it really be 5G or just re-branded 4G? Light Reading has explained this issue nicely here.

So while there are many potential applications & use cases that will benefit from 5G in the long run, the answers are not that easily available today. Anyhow, the collection of videos and slides embedded below will provide you with an insight on how different vendors and operators are looking at potentially using 5G.

Miscellaneous: 5G Uses Cases - April 2019 from 3G4G

The latest version of these slides are available to download from UK5G website here.

Non-public networks (NPN) - Private Networks by another name

3GPP TS 22.261, Service requirements for the 5G system; Stage 1 gives a definition of non-public network which is simply defined as 'a network that is intended for non-public use'. Section 6.25 provides more info

Non-public networks are intended for the sole use of a private entity such as an enterprise, and may be deployed in a variety of configurations, utilising both virtual and physical elements. Specifically, they may be deployed as completely standalone networks, they may be hosted by a PLMN, or they may be offered as a slice of a PLMN.

In any of these deployment options, it is expected that unauthorised UEs, those that are not associated with the enterprise, will not attempt to access the non-public network, which could result in resources being used to reject that UE and thereby not be available for the UEs of the enterprise. It is also expected that UEs of the enterprise will not attempt to access a network they are not authorised to access. For example, some enterprise UEs may be restricted to only access the non-public network of the enterprise, even if PLMN coverage is available in the same geographic area. Other enterprise UEs may be able to access both a non-public network and a PLMN where specifically allowed.

The requirements section is interesting too:

• The 5G system shall support non-public networks.
• The 5G system shall support non-public networks that provide coverage within a specific geographic area.
• The 5G system shall support both physical and virtual non-public networks. 
• The 5G system shall support standalone operation of a non-public network, i.e. a non-public network may be able to operate without dependency on a PLMN.
• Subject to an agreement between the operators and service providers, operator policies and the regional or national regulatory requirements, the 5G system shall support for non-public network subscribers:
• access to subscribed PLMN services via the non-public network;
• seamless service continuity for subscribed PLMN services between a non-public network and a PLMN;
• access to selected non-public network services via a PLMN;
• seamless service continuity for non-public network services between a non-public network and a PLMN.
• A non-public network subscriber to access a PLMN service shall have a service subscription using 3GPP identifiers and credentials provided or accepted by a PLMN.
• The 5G system shall support a mechanism for a UE to identify and select a non-public network.
• NOTE: Different network selection mechanisms may be used for physical vs virtual non-public networks.
• The 5G system shall support identifiers for a large number of non-public networks to minimize collision likelihood between assigned identifiers.
• The 5G system shall support a mechanism to prevent a UE with a subscription to a non-public network from automatically selecting and attaching to a PLMN or non-public network it is not authorised to select.
• The 5G system shall support a mechanism to prevent a UE with a subscription to a PLMN from automatically selecting and attaching to a non-public network it is not authorised to select. 
• The 5G system shall support a change of host of a non-public network from one PLMN to another PLMN without changing the network selection information stored in the UEs of the non-public network.

I think it's like M2M (Machine-to-Machine) that is used commonly by the industry but the term used in 3GPP standards are MTC (Machine Type Communications)

— Zahid Ghadialy (@zahidtg) May 6, 2019

5G ACIA (5G Alliance for Connected Industries and Automation), a Working Party of ZVEI (German Electrical and Electronic Manufacturers’ Association) published a White Paper on '5G Non-Public Networks for Industrial Scenarios'.

This paper describes four industrial (IIoT) deployment scenarios for 3GPP-defined 5G non-public networks. The paper also considers key aspects, in particular service attributes that can help to highlight the differences between these scenarios. In contrast to a network that offers mobile network services to the general public, a 5G non-public network (NPN, also sometimes called a private network) provides 5G network services to a clearly defined user organisation or group of organisations.

The PDF of the white paper is available here.

Webinar: Where Edge Meets Cloud by Dean Bubley

Dean Bubley, Outspoken Telecoms & Mobile Industry Analyst, Consultant & Chair/Speaker on Networks, Wireless, Internet, AI & Futurism (as stated in his LinkedIn profile), recently did a webinar on Edge computing for Apis Training. The video recording is available online and embedded below.

Couple of things worth highlighting (but do listen to the webinar, it's got lots of interesting stuff) is as shown in the picture above and below. One of the benefits of Edge is Low latency. If that is the driver then you need to know where your Edge should be because latency will be affected based on the location. Another important point worth remembering is how many Edge-compute facilities can you afford. Latency & the number of facilities are linked to each other so worth thinking about in the beginning as it may not be straightforward to change later.

Anyway, here is the recording of the webinar.



Related post:

• Can Augmented & Mixed Reality be the Killer App 5G needs?

Evolution of Security from 4G to 5G

Dr. Anand Prasad, who is well known in the industry, not just as CISO of Rakuten Mobile Networks but also as the Chairman of 3GPP SA3, the mobile communications security and privacy group, recently delivered a talk on '4G to 5G Evolution: In-Depth Security Perspective'.

3GPP 5G Security via @3GPPLive - https://t.co/1r6xrpg1y0 #NewRadio #NR #NSA pic.twitter.com/AzRSB6347V

— Zahid Ghadialy (@zahidtg) August 9, 2018

The video of the talk is embedded below and the slides are available here.



An article on similar topic by Anand Prasad, et al. is also available on 3GPP website here.


Related posts and articles:

• The 3G4G Blog: Everything you need to know about 5G Security
• Security in Mobile Cellular Systems - 3G4G
• A Security Architecture for 5G Networks - IEEE Access
• Security Aspects of Network Capabilities Exposure in 5G - NGMN
• New security challenges in IMS networks - Orange
• 5G and IoT Security Update from ETSI Security Week 2018 - The 3G4G Blog
• 5G Security Updates - March 2018 - The 3G4G Blog
• Introduction to 3GPP Security in Mobile Cellular Networks - The 3G4G Blog