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- 09/02/16--11:08: _Some more thoughts ...
- 09/11/16--04:22: _How much spectrum w...
- 09/18/16--11:06: _5G Fronthaul: Cross...
- 09/23/16--07:47: _5G New Radio (NR), ...
- 09/26/16--04:05: _QoS in VoWiFi
- 09/30/16--08:13: _Quantum Technology ...
- 10/07/16--04:31: _Whats up with VoLTE...
- 10/16/16--12:53: _Inside 3GPP Release...
- 10/23/16--04:56: _VoLTE Operator Case...
- 10/29/16--11:32: _M2M vs IoT
- 11/06/16--13:14: _LTE, 5G and V2X
- 11/12/16--13:05: _Verizon's 5G Standard
- 11/17/16--13:35: _5G, Debates, Predic...
- 11/23/16--05:07: _Facebook's Attempt ...
- 12/04/16--04:36: _5G, Hacking & Security
- 12/10/16--09:09: _Free Apps for Field...
- 12/31/16--10:36: _Top 10 posts for 2016
- 01/07/17--09:13: _New LTE UE Categori...
- 01/16/17--04:00: _Gigabit LTE?
- 01/22/17--07:25: _Augmented / Virtual...
- 09/02/16--11:08: Some more thoughts on 5G
- Spectrum identification and harmonization.
- Getting to the right architecture which is backward compatible and future proof, without making it too complex
- SON – Once you have everything in place you have to make many different parts of the network work together with different kinds of loads and traffic. SON will play a crucial role here.
- Simplification of the network resulting in low latency – this means that your content will load faster and the delay between requests and responses are small.
- Reasonable speed broadband everywhere - This will also depend on the operators’ rollouts plan but different technologies in 5G network would (should) enable a good speed reliable broadband not just in the middle of the cell but also on the edges. In fact, the concept of edges should be looked at in 5G and a solution to avoid data rates falling off should be found.
- Connectivity on the move – Whether we are talking about connectivity in trains/buses or from public safety point of view, it is important to define group connectivity, direct communications, etc.
- 09/11/16--04:22: How much spectrum would 5G need?
- 5G Spectrum Discussions
- Feasibility Study on New Services and Markets Technology Enablers for 5G
- NTT Docomo's 5G Treasure Trove
- Some more thoughts on 5G
- 09/18/16--11:06: 5G Fronthaul: Crosshaul & XHaul
- Dynamically programmable, high capacity, low latency, point-to-multipoint mm-Wave transceivers, cooperating with Sub-6 GHz systems;
- A Time Shared Optical Network offering elastic and fine granular bandwidth allocation, cooperating with advanced passive optical networks;
- A software-defined cognitive control plane, able to forecast traffic demand in time and space, and the ability to reconfigure network components.
- Developing novel converged optical/wireless architectures and network management algorithms for mobile scenarios;
- Introduce advanced mm-Wave and optical transceivers and control functions;
- Support the development of international standards through technical and technoeconomic contributions.
- Fronthaul and backhaul: Look out, a fusion is coming! - Alan Carlton, Interdigital
- RAN Evolution Project: Backhaul and Fronthaul Evolution - NGMN
- Examining the fronthaul opportunities for future radio access - Shigeru Kuwano, NTT Access Network Service Systems
- 5 Things You Need to Know About vRAN: “vRAN architecture: centralize or distribute” - Amir Atai, Parallel Wireless
- 5G-XHaul project looks at WDM-PON for mobile fronthaul, backhaul - Lightwave
- Why WDM is essential in C-RAN fronthaul networks? - Ultra high CPRI link capacity - Steve Shin and Dr. Harrison J. Son, Netmanias
- Fronthaul Evolution Toward 5G: Standards and Proof of Concepts
- 09/23/16--07:47: 5G New Radio (NR), Architecture options and migration from LTE
- 09/26/16--04:05: QoS in VoWiFi
- Turning on WMM (or WME) at access point provides significant protection for voice traffic against competing wireless data traffic
- Turning on WMM at the client makes only a small difference where there are a small number of clients on the wireless LAN. This plus the “TCP Unfairness” problem means that it can be omitted.
- All Home gateways support WMM but their firmware may need to be altered to prioritise on DSCP rather than layer two
- CWAP – MAC Header : QoS Control
- Mobile Traffic Engineering with Application Visibility and Control (AVC) - Cisco
- Calling VoWiFi... The Next Mobile Operator Service is here... - Cisco
- 09/30/16--08:13: Quantum Technology and Future Telecommunications
- TelcoFuturism - the impact of Quantum Technology - Dean Bubley, Disruptive Analysis
- Is Quantum Computing the future? Cambridge conference has the answers - Cambridge News
- Quantum 2.0 has potential to create step change in computing and communications - Cambridge Wireless
- Are you ready for the Quantum Revolution? - Mark England, Cambridge Consultants
- Does cryptography offer data protection a quantum of solace? - David Reed, DataIQ
- CW TEC main page
- 10/07/16--04:31: Whats up with VoLTE Roaming?
- VoLTE Roaming – Let’s Take Away The Confusion - iBasis
- VoLTE Roaming – Critical enabler or long term ideal? - 5G World
- VoLTE Roaming Confusion and the IPX Provider Opportunity - Ovum
- IPX providers must look internally for class-of-service customers - Ovum
- 10/16/16--12:53: Inside 3GPP Release-13 - Whitepaper by 5G Americas
- Tweets from NGMN Industry Conference & Exhibition 2016
- 3GPP Release-13 whitepapers and presentations
- LTE-Advanced Pro (a.k.a. 4.5G)
- New whitepaper on Narrowband Internet of Things
- 10/23/16--04:56: VoLTE Operator Case Study from LTE Voice Summit
- 170 million voice calls minutes have used VoLTE since the launch in Sept 2015
- Only devices that can support VoLTE and 800MHz are allowed to camp on 800MHz band. This is to avoid disappointment with CS Fallback
- There are plans to roll out VoLTE in other bands too once all niggles are ironed out in the 800MHz band.
- LTE Voice Summit 2016 Event Report - David Chambers, ThinkSmallCell
- The Wi-Fi last operators, Alberto Diez
- LTE Voice Summit 2016: Going beyond VoLTE to advance network performance
- Summary of LTE Voice Summit 2016 - Tweet collection by Zahid Ghadialy
- Quick Summary of LTE Voice Summit 2015
- Whats up with VoLTE Roaming?
- QoS in VoWiFi
- Two VoLTE Deployment Case Studies
- 10/29/16--11:32: M2M vs IoT
- Connectivity: connection for machines;
- Content: massive raw data from things;
- Cloud: cloud service and XaaS (Everything as a Service) for IoT;
- Context: context-aware design;
- Collaboration: collaborative services;
- Cognition: semantics and autonomous system adjustment
- 11/06/16--13:14: LTE, 5G and V2X
- Feasibility Study on New Services and Markets Technology Enablers for 5G
- Connected and Autonomous vehicles: Beyond Infotainment and Telematics
- Connected and Autonomous Car Revolution
- 11/12/16--13:05: Verizon's 5G Standard
- AT&T's 5G Trials
- 5G New Radio (NR), Architecture options and migration from LTE
- Some more thoughts on 5G
- 3GPP Release-14 & Release-15 update
- 11/17/16--13:35: 5G, Debates, Predictions and Stories
- 11/23/16--05:07: Facebook's Attempt to Connect the Unconnected
- TIP Summit 2016
- An update from TIP 2016 summit
- The race to 5G gets a whole lot more social - An interview with Subbu Subramanian, engineering director at Facebook
- 12/04/16--04:36: 5G, Hacking & Security
- Three Presentations on 5G Security
- New whitepaper on Narrowband Internet of Things
- 5G New Radio (NR), Architecture options and migration from LTE
- M2M vs IoT
- Some more thoughts on 5G
- LTE, 5G and V2X
- 5G, Debates, Predictions and Stories
- 12/10/16--09:09: Free Apps for Field Testing
- 12/31/16--10:36: Top 10 posts for 2016
- 5G New Radio (NR), Architecture options and migration from LTE
- M2M vs IoT
- Antenna evolution: From 4G to 5G
- The Art of Disguising Cellular Antennas
- SDN & NFV lecture
- 3GPP Release-14 & Release-15 update
- End to end and top to bottom network design…
- Possible 5G Network Architecture Evolution
- Does 5G need 'Next Generation' of Internet Protocols?
- How much spectrum would 5G need?
- 01/07/17--09:13: New LTE UE Categories (Downlink & Uplink) in Release-13
- The field ue-CategoryDL is set to values m1, 0, 6, 7, 9 to 19 in this version of the specification.
- The field ue-CategoryUL is set to values m1, 0, 3, 5, 7, 8, 13 or 14 in this version of the specification.
- 3GPP TS 36.331: Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification
- 3GPP TS 36.306: Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio access capabilities
- http://niviuk.free.fr/ue_category.php - up to date info on LTE UE categories
- 01/16/17--04:00: Gigabit LTE?
- TIM in Italy is the first in Europe to launch 4.5G up to 500 Mbps in Rome, Palermo and Sanremo
- Telenet in partnership with ZTE have achieved a download speed of 1.3 Gbps during a demonstration of the ZTE 4.5G new technology. That's four times faster than 4G's maximum download speed. Telenet is the first in Europe to reach this speed in real-life circumstances. 4.5G ZTE technology uses 4x4 MIMO beaming, 3-carrier aggregation, and a QAM 256 modulation.
- AT&T said, "The continued deployment of our 4G LTE-Advanced network remains essential to laying the foundation for our evolution to 5G. In fact, we expect to begin reaching peak theoretical speeds of up to 1 Gbps at some cell sites in 2017. We will continue to densify our wireless network this year through the deployment of small cells and the use of technologies like carrier aggregation, which increases peak data speeds. We’re currently deploying three-way carrier aggregation in select areas, and plan to introduce four-way carrier aggregation as well as LTE-License Assisted Access (LAA) this year."
- T-Mobile USA nearly reached a Gigabit and here is what they say, "we reached nearly 1 Gbps (979 Mbps) on our LTE network in our lab thanks to a combination of three carrier aggregation, 4x4 MIMO and 256 QAM (and an un-released handset)."
- The other US operator Sprint expects to unveil some of its work with 256-QAM and massive MIMO on Sprint’s licensed spectrum that pushes the 1 gbps speed boundary. It’s unclear whether this will include an actual deployment of the technology
- 01/22/17--07:25: Augmented / Virtual Reality Requirements for 5G
- Humans process nearly 5.2 gigabits per second of sound and light.
- Without moving the head, our eyes can mechanically shift across a field of view of at least 150 degrees horizontally (i.e., 30:000 pixels) and 120 degrees vertically (i.e., 24:000 pixels).
- The human eye can perceive much faster motion (150 frames per second). For sports, games, science and other high-speed immersive experiences, video rates of 60 or even 120 frames per second are needed to avoid motion blur and disorientation.
- 5.2 gigabits per second of network throughput (if not more) is needed.
- At today’s 4K resolution, 30 frames per second and 24 bits per pixel, and using a 300 : 1 compression ratio, yields 300 megabits per second of imagery. That is more than 10x the typical requirement for a high-quality 4K movie experience.
- 5G network architectures are being designed to move the post-processing at the network edge so that processors at the edge and the client display devices (VR goggles, smart TVs, tablets and phones) carry out advanced image processing to stitch camera feeds into dramatic effects.
- In order to tackle these grand challenges, the 5G network architecture (radio access network (RAN), Edge and Core) will need to be much smarter than ever before by adaptively and dynamically making use of concepts such as software defined networking (SDN), network function virtualization (NFV) and network slicing, to mention a few facilitating a more flexible allocating resources (resource blocks (RBs), access point, storage, memory, computing, etc.) to meet these demands.
- Immersive technology will require massive improvements in terms of bandwidth, latency and reliablility. Current remotereality prototype requires 100-to-200Mbps for a one-way immersive experience. While MirrorSys uses a single 8K, estimates about photo-realistic VR will require two 16K x 16K screens (one to each eye).
- Latency is the other big issue in addition to reliability. With an augmented reality headset, for example, real-life visual and auditory information has to be taken in through the camera and sent to the fog/cloud for processing, with digital information sent back to be precisely overlaid onto the real-world environment, and all this has to happen in less time than it takes for humans to start noticing lag (no more than 13ms). Factoring in the much needed high reliability criteria on top of these bandwidth and delay requirements clearly indicates the need for interactions between several research disciplines.
- Have researchers moved on past 5G on to 6G Wireless?
- Quantum Technology and Future Telecommunications
- 'Mobile Edge Computing' (MEC) or 'Fog Computing' (fogging) and 5G & IoT
Now that I have had time to think about the questions, here are a bit more detailed thoughts. As always, feedback, comments & suggestions welcome
Q: What will network architecture look like in the 5G era?
I have long argued that 5G will not be a single technology but a combination of multiple old and new technologies. You will often find various terms like Multi-stream Aggregation (MSA), Opportunistic Aggregation and Multi-connectivity being used to explain this. Not only will 2G, 3G and 4G have a role to play, Wi-Fi and other unlicensed technologies would be a part of 5G too.
I have had many discussions on this topic with respected analysts and many of them agree.
One of the approaches being proposed for the initial version of 5G is the non-standalone version of 5G which will use LTE as the control plane anchor and new 5G radio for user plane. Not only will this be easier to deploy along with the existing LTE network, it would be faster and hopefully less costly.This #5G chart sums it up. Start from where we are, go in 4 different directions at once, give it all the same name https://t.co/ETldL8Sr8N— Dan Warren (@TMGB) June 28, 2016
Q: To what extent is 5G dependent on virtualization?
Networks and Network Functions are progressively being virtualized, independently of 5G. Having said that, virtualization will play a big role in achieving the 5G architecture. Mobile operators can’t be expected to keep paying for proprietary hardware; virtualization would help with cost reduction and quick deployments.
Network slicing for instance will help partition the network for different requirements, on the fly depending on what is going on at any particular time.
Q: What is your view on the interplay between standards and open-source developments?
Standards enable cost reduction by achieving economy of scale whereas open-source development enable innovation and quick deployment. They are both needed and they will willingly or unwillingly co-exist.
Q: What do you see as the 3 greatest technical uncertainties or challenges on route to 5G?
While there are many known and unknown challenges with 5G, some obvious ones that we can see are:
Q: What would 5G actually mean for consumers, business and IoT? / What will 5G allow me to do that I can’t right now with 4G?
There are a lot of interesting use cases being discussed like remote operations and remote controlled cars but most of them do not represent the general consumers and some of them are just gimmicks.
I really like the NGMN whitepaper that laid out some simple use cases.
If done properly, 5G will allow:
Q: What will set companies apart in the development of 5G?
The days of vendor lock-ins are over. What will set companies apart is their willingness to be open to working with other companies by having open API’s and interfaces. Operator networks will include solutions from many different vendors. For them to be quick to bring innovative solutions to the market, they need vendors to work together rather than against each other.
Q: There is a lot of talk about the vision for 2020. What do you think the world will look like in terms of connectivity in 2030?
It would be fair to say that by 2030, connectivity would have reached a completely new dimension. One of the big areas of development that is being ignored by mainstream mobile community is the development of satellite communications. There are many low earth orbit (LEO) constellations and high-throughput satellites (HTS) being developed. These LEO and HTS combination can provide high speed connectivity with 4G like latency and high throughputs for planes/ships which cannot be served by ground based mobile technology. Broadband access everywhere will only become a reality with satellite technology complementing mobile technology.
Disclaimer: This blog is maintained in my personal capacity and this post expresses my own personal views, not the views of my employer or anyone else.
The above picture is a summary of the spectrum that was agreed to be studied for IMT-2020 (5G). You can read more about that here. I have often seen discussions around how much spectrum would be needed by each operator in total. While its a complex question, we cannot be sure unless 5G is defined completely. There have been some discussions about the requirements which I am listing below. More informed readers please feel free to add your views as comments.
Real Wireless has done some demand analysis on how much spectrum is required for 5G. A report by them for European Commission is due to be published sometime soon. As can be seen in the slide above, one of the use cases is about multi gigabit motorway. If the operators deploy 5G the way they have deployed 4G then 56 GHz of spectrum would be required. If they move to a 100% shared approach where all operators act as MVNO and there is another entity that deploys all infrastcture, including spectrum then the spectrum requirement will go down to 14 GHz.
This is in addition to all the other spectrum for 2G, 3G & 4G that the operator already holds. I have embedded the presentation below and it can be downloaded from here:
The UK Spectrum Policy Forum (UKSPF) recently held a workshop on Frequency bands for 5G, the presentations for which are available to download on the link I provided.
Its going to be a huge challenge to estimate what applications will require how much amount of spectrum and what would be the priority as compared to other applications. mmMagic is one such group looking at spectrum requirements, use cases, new concepts, etc. They have estimated that around 3.1GHz would be required by each operator for 99% reliability. This seems more reasonable. It would be interesting to see how much would operators be willing to spend for such a quantity of spectrum.
While I am critical of the C-RAN approach, there are many vendors and engineers & architects within these vendors who are for or against this technology. I am going to leave the benefits and drawbacks of C-RAN in light of new developments (think Moore's law) for some other day.
earlier post explains the concept of Fronthaul and Backhaul for anyone who may not be aware. As data speeds keep on increasing with 4G, 4.5G, 4.9G, 5G, etc. it makes much more sense to use Fiber for Fronthaul. Dark fiber would be a far better choice than a lit one.
One thing that concerned me was what happens in case of MIMO or massive MIMO in 5G. Would we need multiple Fronthaul/Fibre or just a single one would do. After having some discussions with industry colleagues, looks like a single fiber is enough.
NTT presentation illustrates how WDM (Wavelength Division Multiplexing) can be used to send different light wavelengths over a single fiber thereby avoiding the need to have multiple of these fibers in the fronthaul.
There are 2 different projects ongoing to define 5G Fronthaul & Backhaul.
The first of these is 5G Crosshaul. Their website says:
The 5G-Crosshaul project aims at developing a 5G integrated backhaul and fronthaul transport network enabling a flexible and software-defined reconfiguration of all networking elements in a multi-tenant and service-oriented unified management environment. The 5G-Crosshaul transport network envisioned will consist of high-capacity switches and heterogeneous transmission links (e.g., fibre or wireless optics, high-capacity copper, mmWave) interconnecting Remote Radio Heads, 5GPoAs (e.g., macro and small cells), cloud-processing units (mini data centres), and points-of-presence of the core networks of one or multiple service providers. This transport network will flexibly interconnect distributed 5G radio access and core network functions, hosted on in-network cloud nodes, through the implementation of: (i) a control infrastructure using a unified, abstract network model for control plane integration (Crosshaul Control Infrastructure, XCI); (ii) a unified data plane encompassing innovative high-capacity transmission technologies and novel deterministic-latency switch architectures (Crosshaul Packet Forwarding Element, XFE).
The second is 5G XHaul. Their website says:
It remains to be seen if C-RAN will play a big role in 5G. If yes how much of Crosshaul and XHaul will help.
It should be mentioned that Rel-10/11/12 version of LTE is referred to as LTE-Advanced and Rel-13/14 is being referred to as LTE-A Pro. Rel-15 will probably have a new name but in various discussions its being referred to as eLTE.
When first phase of 5G arrives in Rel-15, eLTE would be used for access network and EPC will still be used for core network. 5G will use NR and eventually get a new core network, probably in time for phase 2. This is often referred to as next generation core network (NGCN).
The slides below from Deutsche Telekom show their vision of how operators should migrate from eLTE to 5G.
The slides below from AT&T show their vision of LTE to 5G migration.
Eiko Seidel posted the following in 3GPP 5G standards group (i recommend you join if you want to follow technical discussions)
Summary RAN1#86 on New Radio (5G) Gothenburg, Sweden
At this meeting RAN1 delegates presented and discussed numerous evaluation results mainly in the areas of waveforms and channel coding.
Nonetheless RAN1 was not yet prepared to take many technical decisions. Most agreements are still rather general.
First NR terminology has been defined. For describing time structures mini-slots have been introduced: a mini-slot is the smallest possible scheduling unit and smaller than a slot or a subframe.
Discussions on waveforms favored filtered and windowed OFDM. Channel coding discussions were in favor of LDPC and Turbo codes. But no decisions have been made yet.
Not having taken many decisions at this meeting, RAN1 now is behind its schedule for New Radio.
Hopefully the lag can be made up at two additional NR specific ad hoc meetings that have been scheduled for January and June 2017.
(thanks to my colleague and friend Dr. Frank Kowalewski for writing this short summary!)
Yet another post from Eiko on 3GPP RAN 3 on related topic.
The RAN3 schedule is that in February 2017 recommendations can be made for a protocol architecture. In the meeting arguments came up by some parties that the work plan is mainly addressing U-Plane architecture and that split of C- and U-plane is not considered sufficiently. The background is that the first step will be dual connectivity with LTE using LTE RRC as control plane and some companies would like to concentrate on this initially. It looks like that a prioritization of features might happen in November timeframe. Beside UP and CP split, also the functional split between the central RAN node and the distributed RAN node is taking place for the cloud RAN fronthaul interface. Besides this, also discussion on the fronthaul interface takes place and it will be interesting to see if RAN3 will take the initiative to standardize a CPRI like interface for 5G. Basically on each of the three interfaces controversial discussion is ongoing.
Yet another basic question is, what is actually considered as a “New 5G RAN”? Is this term limited to a 5G eNB connected to the NG core? Or can it also be also an eLTE eNB with Dual Connectivity to 5G? Must this eLTE eNB be connected to the 5G core or is it already a 5G RAN when connected to the EPC?
Finally, a slide from Qualcomm on 5G NR standardization & launch.
As the summary of the above presentation says:
As this Wikipedia entry explains:
Wireless Multimedia Extensions (WME), also known as Wi-Fi Multimedia (WMM), is a Wi-Fi Alliance interoperability certification, based on the IEEE 802.11e standard. It provides basic Quality of service (QoS) features to IEEE 802.11 networks. WMM prioritizes traffic according to four Access Categories (AC): voice (AC_VO), video (AC_VI), best effort (AC_BE), and background (AC_BK). However, it does not provide guaranteed throughput. It is suitable for well-defined applications that require QoS, such as Voice over IP (VoIP) on Wi-Fi phones (VoWLAN).
WMM replaces the Wi-Fi DCF distributed coordination function for CSMA/CA wireless frame transmission with Enhanced Distributed Coordination Function (EDCF). EDCF, according to version 1.1 of the WMM specifications by the Wi-Fi Alliance, defines Access Categories labels AC_VO, AC_VI, AC_BE, and AC_BK for the Enhanced Distributed Channel Access (EDCA) parameters that are used by a WMM-enabled station to control how long it sets its Transmission Opportunity (TXOP), according to the information transmitted by the access point to the station. It is implemented for wireless QoS between RF media.
This blog post describes how the QoS works in case of WMM.
Finally, this slide from Cisco shows how it will all fit together.
The main question that I had before the conference was 'when will quantum technology be here?'. While there were different answers, depending on what you think Quantum is, I think the answer I feel comfortable is more like 2030 (just in time for 6G?)
There are already some great write-ups of the conference by others, please see links at the bottom of the post. However I have tried to create a story based on the tweets and embedded the links to presentations for each speaker where available. Hopefully you will enjoy my story.
Blog posts and summaries of CW TEC 'The Quantum Revolution is Coming' conference:
One of the criticisms of VoWiFi is that it does not the QoS aspect is missing, which makes VoLTE special. In a recent post, I looked at the QoS in VoWiFi issue. If you haven't seen it, see here.
Coming back to VoLTE roaming, I came across this recent presentation by Orange.
here. What this presentation suggests is to use LBO with no MTR (Mobile Termination Rates) but instead use TAP (Transferred Account Procedures). The presentation is embedded below:
Another approach that is not discussed too much but seems to be the norm at the moment is the use of IP eXchange (IPX). I also came across this other panel discussion on the topic
IPX is already in use for data roaming today and acts as a hub between different operators helping to solve inter-operability issues and mediating between roaming models. It can work out based on the calling and callee party what kind of quality and approach to use.
Here is the summary of the panel discussion:
Hopefully the LTE Voice Summit next week will provide some more insights. I look forward to hearing them.
Blog posts on related topics:
The following is from the 5G Americas press release:
The whitepaper as follows:
Phil Sheppard, Director of Network Strategy & Architecture, Three UK was the keynote speaker of LTE Voice Summit held in London this month. Its been over a year that Three launched its VoLTE service in the 800MHz band. In fact recently, it has started showing adverts with Maisie Williams (Arya Stark from Game of Thrones) fighting black spots (not spots) with 4G Super-Voice.
As I highlighted in the LTEVoice 2015 summary where China Mobile group vice-president Mr.Liu Aili admitted "VoLTE network deployment is the one of the most difficult project ever, the implementation complexity and workload is unparalleled in history", Three UK's experience wasn't very different. Quoting from ThinkSmallCell summary of the event:
It was a huge project, the scope far exceeding original expectations and affecting almost every part of their operations. They spent 22,245 man days (excluding vendor staff time) – more than 100 man years of effort – mostly involved with running huge numbers of test cases on the network and devices.
There are some other interesting bits from the different summaries that are provided in references below but here are few things I found of interest with regards to Three UK VoLTE deployment:
Here is the presentation from 3 UK:
Blog posts summarizing LTEVoice 2016:
Lets take an example of an office with 3 floors. Lets assume that each floor has a coffee machine like the one in this picture or something similar. Lets assume different scenarios:
Scenario 1: No connectivity
In this case a facilities person has to manually go to each of the floor and check if there are enough coffee beans, chocolate powder, milk powder, etc. He/She may have to do this say 3-4 times a day.
Scenario 2: Basic connectivity (M2M)
Lets say the coffee machine has basic sensors so it can send some kind of notification (on your phone or email or message, etc.) whenever the coffee beans, chocolate powder, milk powder, etc., falls below a certain level. In some cases you may also be able to check the levels using some kind of a app on your phone or computer. This is an example of M2M
Scenario 3: Advanced connectivity (IoT)
Lets say that the coffee machine is connected to the office system and database. It knows which employees come when and what is their coffee/drinks consumption pattern. This way the machine can optimize when it needs to be topped up. If there is a large meeting/event going on, the coffee machine can even check before the breaks and indicate in advance that it needs topping up with beans/chocolate/milk/etc.
Scenario 4: Intelligent Devices (Advanced IoT)
If we take the coffee machine from scenario 3 and add intelligence to it, it can even know about the inventory. How much of coffee beans, chocolate powder, milk powder, etc is in stock and when would they need ordering again. It can have an employee UI (User Interface) that can be used by employees to give feedback on which coffee beans are more/less popular or what drinks are popular. This info can be used by the machines to order the supplies, taking into account the price, availability, etc.
In many cases, API's would be available for people to build services on top of the basic available services to make life easier. Someone for example can build a service that if a cup is already at the dispenser and has been there for at least 2 minutes (so you know its not being used by someone else) then the person can choose/order their favourite drink from their seat so he/she doesn't have to wait for 30 seconds at the machine.
If you think about this further you will notice that in this scenario the only requirement for the human is to clean the coffee machine, top it up, etc. In future these can be automated with robots carrying out these kinds of jobs. There would be no need for humans to do these menial tasks.
I really like this slide from InterDigital as it captures the difference between M2M and IoT very well, especially in the light of the discussion above.
With the current M2M, we have:
IoT is Communication to/from things which offer new services via cloud / context / collaboration / cognition technologies.
With evolution to IoT, we have:
V2V communications are based on D2D communications defined as part of ProSe services in Release 12 and Release 13 of the specification. As part of ProSe services, a new D2D interface (designated as PC5, also known as sidelink at the physical layer) was introduced and now as part of the V2V WI it has been enhanced for vehicular use cases, specifically addressing high speed (up to 250Kph) and high density (thousands of nodes).
5G Americas has also published a whitepaper on V2X Cellular Solutions. From the press release:
Vehicle-to-Everything (V2X) communications and solutions enable the exchange of information between vehicles and much more - people (V2P), such as bicyclists and pedestrians for alerts, vehicles (V2V) for collision avoidance, infrastructure (V2I) such as roadside devices for timing and prioritization, and the network (V2N) for real time traffic routing and other cloud travel services. The goal of V2X is to improve road safety, increase the efficiency of traffic, reduce environmental impacts and provide additional traveler information services. 5G Americas, the industry trade association and voice of 5G and LTE for the Americas, today announced the publication of a technical whitepaper titled V2X Cellular Solutions that details new connected car opportunities for the cellular and automotive industries.
The whitepaper describes the benefits that Cellular V2X (C-V2X) can provide to support the U.S. Department of Transportation objectives of improving safety and reducing vehicular crashes. Cellular V2X can also be instrumental in transforming the transportation experience by enhancing traveler and traffic information for societal goals.
C-V2X is part of the 3GPP specifications in Release 14. 3GPP announced the completion of the initial C-V2X standard in September 2016. There is a robust evolutionary roadmap for C-V2X towards 5G with a strong ecosystem in place. C-V2X will be a key technology enabler for the safer, more autonomous vehicle of the future.
The whitepaper is embedded below:
Some of you may be unaware that the US operator Verizon has formed 'Verizon 5G Technology Forum' (V5GTF) with the intention of developing the first set of standards that can also influence the direction of 3GPP standardization and also provide an early mover advantage to itself and its partners.
The following from Light Reading news summarizes the situation well:
Verizon has posted its second round of work with its partners on a 5G specification. The first round was around the 5G radio specification; this time the work has been on the mechanics of connecting to the network. The operator has been working on the specification with Cisco Systems Inc., Ericsson AB, Intel Corp., LG Electronics Inc., Nokia Corp., Qualcomm Inc. and Samsung Corp. via the 5G Technology Forum (V5GTF) it formed late in 2015.
Sanyogita Shamsunder, director of strategy at Verizon, says that the specification is "75% to 80% there" at least for a "fixed wireless use case." Verizon is aiming for a "friendly, pre-commercial launch" of a fixed wireless pilot in 2017, Koeppe notes.
Before we go further, lets see this excellent video by R&S wherein Andreas Roessler explains what Verizon is up to:
Verizon and SKT are both trying to be the 5G leaders and trying to roll out a pre-standard 5G whenever they can. In fact Qualcomm recently released a 28 GHz modem that will be used in separate pre-standard 5G cellular trials by Verizon and Korea Telecom
EE times article:
Coming back to Verizon's 5G standard, is it good enough and compatible with 3GPP standards? The answer right now seems to be NO.
The following is from Rethink Wireless:
The issue is that Verizon’s specs include a subcarrier spacing value of 75 kHz, whereas the 3GPP has laid out guidelines that subcarrier spacing must increase by 30 kHz at a time, according to research from Signals Research Group. This means that different networks can work in synergy if required without interfering with each other.
Verizon’s 5G specs do stick to 3GPP requirements in that it includes MIMO and millimeter wave (mmWave). MmWave is a technology that both AT&T and Verizon are leading the way in – which could succeed in establishing spectrum which is licensed fairly traditionally as the core of the US’s high frequency build outs.
A Verizon-fronted group recently rejected a proposal from AT&T to push the 3GPP into finalizing an initial 5G standard for late 2017, thus returning to the original proposed time of June 2018. Verizon was supported by Samsung, ZTE, Deutsche Telecom, France Telecom, TIM and others, which were concerned the split would defocus SA and New Radio efforts and even delay those standards being finalized.
Verizon has been openly criticized in the industry, mostly by AT&T (unsurprisingly), as its hastiness may lead to fragmentation – yet it still looks likely to beat AT&T to be the first operator to deploy 5G, if only for fixed access.
Verizon probably wants the industry to believe that it was prepared for eventualities such as this – prior to the study from Signal Research Group, the operator said its pre-standard implementation will be close enough to the standard that it could easily achieve full compatibility with simple alterations. However, Signals Research Group’s president Michael Thelander has been working with the 3GPP since the 5G standard was birthed, and he begs to differ.
Thelander told FierceWireless, “I believe what Verizon is doing is not hardware-upgradeable to the real specification. It’s great to be trialing, even if you define your own spec, just to kind of get out there and play around with things. That’s great and wonderful and hats off to them. But when you oversell it and call it 5G and talk about commercial services, it’s not 5G. It’s really its own spec that has nothing to do with Release 16, which is still three years away. Just because you have something that operates in millimeter wave spectrum and uses Massive MIMO and OFDM, that doesn’t make it a 5G solution.”
While there can be some good learning as a result of this pre-5G standard, it may be a good idea not to get too tied into it. A standard that is not compliant will not achieve the required economy of scale, either with handsets or with dongles and other hotspot devices.
CW (Cambridge Wireless) organised a couple of debates on 5G as can be seen from the topics above. Below is the summary video and twitter discussion summary/story.
The second story is from 'The Great Telco Debate 2016' organised by TM forum
I am not embedding the story but for anyone interested, they can read the twitter summary here: https://storify.com/zahidtg/the-great-telco-debate-2016
Finally, it was 'Predictions: 2017 and Beyond', organised by CCS Insight. The whole twitter discussion is embedded below.
The chart above is very interesting and shows that there are still people who use 2G to access Facebook. Personally, I am not sure if these charts take Wi-Fi into account or not.
In my earlier post in the Small Cells blog, I have made a case for using Small Cells as the best solution for rural & remote coverage. There are a variety of options for power including wind turbines, solar power and even the old fashioned diesel/petrol generators. The main challenge is sometimes the backhaul. To solve this issue Facebook has been working on its drones as a means of providing the backhaul connectivity.
There were quite a few interesting talks (videos available here). I have embedded the slides and the talk by SK Telecom below but before I that I was to highlight the important point made by AMN.
As can be seen in the picture above, technology is just one of the challenges in providing rural and remote connectivity. There are other challenges that have to be considered too.
Embedded below is the talk provided by Dr. Alex Jinsung Choi, CTO, SK Telecom and TIP Chairman and the slides follow that.
For more info, see:
It looks like devices that are not manufactures with security and privacy in mind are going to be the weakest link in future network security problems. I am sure you have probably read about how hacked cameras and routers enabled a Mirai botnet to take out major websites in October. Since then, there has been no shortage of how IoT devices could be hacked. In fact the one I really liked was 'Researchers hack Philips Hue lights via a drone; IoT worm could cause city blackout' 😏.
Enter 5G and the problem could be be made much worse. With high speed data transfer and signalling, these devices can create an instantaneous attack on a very large scale and generating signalling storm that can take a network down in no time.
Giuseppe TARGIA, Nokia presented an excellent summary of some of these issues at the iDate Digiworld Summit 2016. His talk is embedded below:
You can check out many interesting presentations from the iDate Digiworld Summit 2016 on Youtube and Slideshare.
Here are a few tools that I use. If you have one that I havent listed below, please add it in comments.
The screen shot shows the main tools along with my favourite, SpeedTest. While I agree that Speedtest is not the most reliable approach to speed of your connection, I think its the most standard one being used.
WiFi Analyzer is another great app that can be used at home and other locations where people complain about not getting good WiFi speeds. I have been at locations where the 2.4GHz is absolutely packed with APs. 5GHz is also getting busier, though there are still a lot of free channels.
G-NetTrack Lite is a great tool to keep track of the cells you have been visiting. In case you are driving this can collect a lot of valuable info. The paid version, G-NetTrack Pro can collect the info in form of a map that can be used for offline viewing with the help of Google Earth.
I use LTE Discovery mainly for finding the band I am currently camped on. It would be great if a tool can give the exact frequency and earfcn but the band is good enough too. I was once in a situation where I could see two different cells but they had the same PCI. Only after using this, I figured out they were on different bands.
Finally, Network Cell Info Lite gives neighbour cells which can often be useful. I am not sure of these are the neighbours from System Info or from Measurement Control messages sent by network or just something like Detected cells that the phone sees around.
Pind and IPConfig are other tools that can come handy sometimes.
Are there any other tools that you like? Please share using comments.
Here are top 10 3G4G blog posts for 2016:
An example defined here is as follows:
Example of RRC signalling for the highest combination
ue-Category = 4
ue-Category-v1020 = 7
ue-Category-v1170 = 10
ue-Category-v11a0 = 12
ue-CategoryDL-r12 = 12
ue-CategoryUL-r12 = 13
ue-CategoryDL-v1260 = 16
From the RRC Specs:
3GPP TS 36.306 section 4 provides much more details on these UE categories and their values. I am adding these pictures from the LG space website.
Early January, it announcedSnapdragon 835 at CES that looks impressive. Android central says "On the connectivity side of things, there's the Snapdragon X16 LTE modem, which enables Category 16 LTE download speeds that go up to one gigabit per second. For uploads, there's a Category 13 modem that lets you upload at 150MB/sec. For Wi-Fi, Qualcomm is offering an integrated 2x2 802.11ac Wave-2 solution along with an 802.11ad multi-gigabit Wi-Fi module that tops out at 4.6Gb/sec. The 835 will consume up to 60% less power while on Wi-Fi."
Technology purists would know that LTE, which is widely referred to as 4G, was in fact pre-4G or as some preferred to call it, 3.9G. New UE categories were introduced in Rel-10 to make LTE into LTE-Advanced with top speeds of 3Gbps. This way, the ITU requirements for a technology to be considered 4G (IMT-Advanced) was satisfied.
LTE-A was already Gigabit capable in theory but in practice we had been seeing peak speeds of up to 600Mbps until recently. With this off my chest, lets look at what announcements are being made. Before that, you may want to revisit what 4.5G or LTE-Advanced Pro is here.
So we are going to see a lot of higher speed LTE this year and yes we can call it Gigabit LTE but lets not forget that the criteria for a technology to be real '4G' was that it should be able to do 1Gbps in both DL and UL. Sadly, the UL part is still not going Gigabit anytime soon.
Ever wondered whether 5G would be good enough for Augmented and Virtual Reality or will we need to wait for 6G? Some researchers are trying to identify the AR / VR requirements, challenges from a mobile network point of view and possible options to solve these challenges. They have recently published a research paper on this topic.
Here is a summary of some of the interesting things I found in this paper:
These key research directions and scientific challenges are summarized in Fig. 3 (above), and discussed in the paper. I advice you to read it here.