DOCSIS (Data Over Cable Service Interface Specification) is an international standard that defines requirements for data transmission over cable television systems. It allows cable TV operators to provide high-speed internet access over existing hybrid fiber-coaxial networks. Key versions include DOCSIS 1.0, 2.0, and 3.0, which have increased downstream and upstream speeds. DOCSIS 3.0 features channel bonding and support for IPv6 to provide up to 160 Mbps downstream and 120 Mbps upstream speeds.
This paper provides a high-level comparison
between LTE and WiMAX. The focus is on two primary areas: System Architecture and Physical Layer. The System Architecture describes the different functional elements in LTE and WiMAX and attempts to map similar functionality (such as mobility, security, access-gateway). We also compare and contrast the various aspects (such as transmission modes, duplexing types) of the physical layer.
This paper provides a high-level comparison
between LTE and WiMAX. The focus is on two primary areas: System Architecture and Physical Layer. The System Architecture describes the different functional elements in LTE and WiMAX and attempts to map similar functionality (such as mobility, security, access-gateway). We also compare and contrast the various aspects (such as transmission modes, duplexing types) of the physical layer.
UMTS Long Term Evolution, LTE, is the technology of choice for the majority of network operators worldwide for providing mobile
broadband data and high-speed internet access to their subscriber base. Due to the high commitment LTE is the innovation platform
for the wireless industry for the next decade.
This class will provide the basics of this fascinating technology. After attending this course you will have an understanding of
OFDM-principles including SC-FDMA as the transmission scheme of choice for the LTE uplink. Multiple antenna technology (MIMO),
a fundamental part of LTE, will be explained as well as its impact on the design of device and network architecture. We’ll give a quick
introduction into the evolution of this technology including future upgrades of LTE features like multimedia broadcast, location based
services and increasing bandwidth through carrier aggregation.
The second part of the course will provide an overview including practical examples and exercises on how to test a LTE-capable device
while performing standardized RF measurements such as power, signal quality, spectrum and receiver sensitivity. We’ll address how
to automate these measurements in a simple and cost-effective way. We will introduce application based testing by demonstrating
end-to-end (E2E), throughput and application testing using the Rohde & Schwarz R&S®CMW500 Wideband Radio Communication
Tester. Examples of application tests are voice over LTE, VoLTE or Video over LTE.
LTE Advanced is the next major milestone in the evolution of LTE and is a crucial solution for addressing the anticipated 1000x increase in mobile data. It incorporates multiple dimensions of enhancements including the aggregation of carriers, advanced antenna techniques. But most of the gain comes from optimizing HetNets, resulting in better performance from small cells. Qualcomm Technologies has prototyped and demonstrated the benefits of LTE Advanced HetNets at many global events. The first step of LTE Advanced—Carrier Aggregation, was commercially launched in June 2013. It was powered by Qualcomm Technologies' third generation Gobi LTE modems, integrated into Snapdragon 800 solutions.
For more information please visit www.qualcomm.com/lte-advanced
Download the presentation here: http://www.qualcomm.com/media/documents/lte-advanced-global-4g-solution
UMTS Long Term Evolution, LTE, is the technology of choice for the majority of network operators worldwide for providing mobile
broadband data and high-speed internet access to their subscriber base. Due to the high commitment LTE is the innovation platform
for the wireless industry for the next decade.
This class will provide the basics of this fascinating technology. After attending this course you will have an understanding of
OFDM-principles including SC-FDMA as the transmission scheme of choice for the LTE uplink. Multiple antenna technology (MIMO),
a fundamental part of LTE, will be explained as well as its impact on the design of device and network architecture. We’ll give a quick
introduction into the evolution of this technology including future upgrades of LTE features like multimedia broadcast, location based
services and increasing bandwidth through carrier aggregation.
The second part of the course will provide an overview including practical examples and exercises on how to test a LTE-capable device
while performing standardized RF measurements such as power, signal quality, spectrum and receiver sensitivity. We’ll address how
to automate these measurements in a simple and cost-effective way. We will introduce application based testing by demonstrating
end-to-end (E2E), throughput and application testing using the Rohde & Schwarz R&S®CMW500 Wideband Radio Communication
Tester. Examples of application tests are voice over LTE, VoLTE or Video over LTE.
LTE Advanced is the next major milestone in the evolution of LTE and is a crucial solution for addressing the anticipated 1000x increase in mobile data. It incorporates multiple dimensions of enhancements including the aggregation of carriers, advanced antenna techniques. But most of the gain comes from optimizing HetNets, resulting in better performance from small cells. Qualcomm Technologies has prototyped and demonstrated the benefits of LTE Advanced HetNets at many global events. The first step of LTE Advanced—Carrier Aggregation, was commercially launched in June 2013. It was powered by Qualcomm Technologies' third generation Gobi LTE modems, integrated into Snapdragon 800 solutions.
For more information please visit www.qualcomm.com/lte-advanced
Download the presentation here: http://www.qualcomm.com/media/documents/lte-advanced-global-4g-solution
Inria - leaflet of research centre Bordeaux Sud-Ouest,Inria
Inria Bordeaux – Sud-Ouest is located on the university campuses of Bordeaux and Pau. With its academic and industrial partners it conducts research in computational sciences and technologies (computer sciences, mathematics and robotics) enhanced by technology transfers and innovation in a particularly stimulating and dynamic region of France.
How to Use EasyBib School Edition: Student Instructionsbeilers
This SlideShare was adapted from http://www.slideshare.net/EasyBib/instructional-presentation to help our high school students sign up for and use effectively EasyBib's School Edition.
Inria - leaflet of research centre Sophia Antipolis - MéditerranéeInria
Thanks to its reputation around the Mediterranean the Inria Sophia Antipolis - Méditerranée research centre is a driving partner in networks of social and economic parties in the regions where it operates. Its ambition is to enhance the appeal of these ecosystems and make them centres of excellence in computational science research.
This presentation briefly describes the Wi-Fi 6 Technology or the latest wi-fi: IEEE802.11ax which I have used at IIT Madras to present and explain my course work(reading assignment). here I have covered all the problems, solutions, and benefits of wi-fi 6, how Wi-Fi evolved, standards, security, advantages, and innovations.
The presentation deals with evolution of telecommunication from basic analog to new age LTE /IMS IP based technology.
It provides easy to follow step by step solution description of migration from PSTN / circuit switched / softswtch solution to IP based IMS .
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
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After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Empowering NextGen Mobility via Large Action Model Infrastructure (LAMI): pav...
Hfc q- more on docsis
1. Broadband System - Q
Satellites are spaced every
2nd degrees above earth
"C" Band
Toward satellite 6.0 GHz "L" Band
Toward earth 4.0 GHz Toward satellite 14.0 GHz
Toward earth 12.0 GHz
TV
TRANSMITTER
Headend
Cable area
DOCSIS simplify.
2. DOCSIS Simplified
Data Over Cable Service Interface Specification (DOCSIS) is an
international standard DOCSIS which defines the communications and
operation support interface requirements for data over cable system. It
permits the addition of high-speed data transfer to an existing cable TV
(CATV) system. It is employed by many cable television operator to
provide Internet access over their existing hybrid fibre coaxial (HFC)
structure. The first DOCSIS specification was version 1.0 issue in March
1997, with revision 1.1 following in April of 1999. Because of increased
demand for symmetric, real-time service such as IP telephony, DOCSIS
was again revised to enhance upstream transmission speed and
(QoS)Quality of Service; this revision - DOCSIS 2.0 was released in
January 2002.
3. DOCSIS Simplified
As frequency allocation band plans differ between US and European
CATV system, DOCSIS standard have been modified for uses in Europe.
These changes were published under the name “EuroDOCSIS”. The main
difference account for differing TV channel bandwidths; European cable
channels conform to PAL TV standard and are 8 MHz wide, whereas in
North-America cable channels conform NTSC standards which are 6 MHz.
The wider bandwidth in EuroDOCSIS architectures permits more
bandwidth to be allocated to the downstream data path (taken from a
user’s point of view, “downstream” is used to download date, while
“upstream” is used to upload data)
4. DOCSIS Simplified
DOCSIS 1.0
High Speed Internet Access. Key features: Downstream transfer rates
between 27 and 36 Mbps over a radio frequency path between 88 and
870 MHz in a 6.0 MHz spacing, depending if you use 64 or 256 QAM.
Upstream traffic transfer rate up to 10 Mbps over a RF path using 200
kHz and 3.2 MHz in the frequency range of 5 to 42 MHz.
But, because data over cable travels on a shared loop, individuals will
see transfer rates drop has more users gain access.
5. DOCSIS Simplified
DOCSIS 1.1
The types of services afforded by DOCSIS 1.1 differ from DOCSIS 1.0
technology, by;
•QoS (Quality of Service) was also added.
•Data fragmentation which permit voice services where latency matters
more than sheer bandwidth.
•Security upgrade
•The ability to pre-equalize upstream traffic, thus doubling reverse path
throughput (10 Mbps per 3.2 MHz spacing, versus 5 Mbps for DOCSIS
1.0)
6. DOCSIS Simplified
DOCSIS 2.0
Added capacity for symmetric services by operating at 64 QAM and having
new 6.4 MHz wide return channel. It increased bandwidth for IP traffic by
using enhanced modulation and improved error correction. The result for
upstream transmission is 30.72 Mbps using 64 QAM, which is 3 times better
than DOCSIS 1.1 and 6 times than DOCSIS 1.0. DOCSIS 2.0 is interoperable
and compatible with DOCSIS 1.x
The latest DOCSIS specification eDOCSIS has been published to the
industry. eDOCSIS stands for embedded DOCSIS, which would provide a
subordinate function at the core chip level to the host device. And, rather than
leveraging a home networking protocol, an eDOCSIS device would feed
directly into a cable network's DOCSIS channel. eDOCSIS is intended to
solve end device (and traffic) management, configuration and security issues
to significantly reduce cost in the service operation and to improve speed and
quality of end customer services.
7. DOCSIS Simplified
MAC layer:
DOCSIS employs a mixture of deterministic access method, specifically
TDMA for DOCSIS 1.0/1.1 and both TDMA and S-CDMA for DOCSIS 2.0,
with a limited use of contention for bandwidth request. In contrast to pure
contention-based MAC CSMA/CD employed in Ethernet systems, DOCSIS
systems experience few collisions. For DOCSIS 1.1 and above, the MAC
layer also includes extensive Quality of Service (QoS) features that help to
efficiently support applications, for example Voice over IP, that have specific
traffic requirements, such as low latency.
8. DOCSIS Simplified
DOCSIS 3.0
The new DOCSIS 3.0 standard that features IPv6 and channel bonding
which enables multiple downstream and upstream channels to be used
together at the same time by a single subscriber.
DOCSIS 3.0 Downstream speed is 160 Mbps and 120 Mbps Upstream.
Channel bonding in computer is an arrangement in which two or more
NETWORK INTERFACE on a host computer are combined for redundancy
or increased throughput.
Internet Protocol Version 6 (IPv6) is a network layer IP standard used by
electronic devices to exchange data across a packet-switched internet
work. It follows IPv4 as the second version of the Internet Protocol to be
formally adopted for general use..
9. DOCSIS Simplified
Throughput:
All of these features combined enable a total upstream throughput of 30.72
Mbit/s per channel (although the upstream speed DOCSIS 1.0 and 1.1 is
limited to 10 Mbit/s). All three versions of the DOCSIS standard support a
downstream throughput of up to 38 Mbit/s per channel with 256 QAM (owning
to 8 MHz channel width, the EuroDOCSIS standard supports downstream
throughput of up to 51 Mbit/s per channel)
DOCSIS 3.0 feature IPv6 and channel bounding, which enable multiple
downstream and upstream channels to be used together at the same time by
a single subscriber.
11. DOCSIS Simplified
The DNA of DOCSIS 3.0
DOCSIS 3.0 a strategically important set of specification for the cable
industry, will provide operators with a rich set of features and service-
enablers. While only scratching the surface when compared to detail
provided by the full set of specifications, this seminar offers a distilled
and more distinct view of DOCSIS 3.0 primary features.
CHANNEL BONDING
This key feature enables simultaneous data transmission on multiple
channels. Current requirements call for equipment to support bonding
at least four upstream and four downstream channels, although the
platform gives operators the flexibility to bond as few as two channels
to meet market needs and competition. Channels used for bonding
need not to be adjacent. Beyond increasing the peak data rate that can
be offered to the subscribers, channels bonding can support an
estimated 10-25 percent more customers per channel due to statistical
multiplexing gains as compared to node splitting.
12. DOCSIS Simplified
Examples of shared data rates supported by DOCSIS 3.0 channel bonding
Downstream capacity ( 6 MHz & 256 QAM ) Upstream capacity ( 6.4 MHz & 64 QAM )
FOUR channels, 160 Mbps FOUR channels, 120 Mbps
THREE channels, 120 Mbps THREE channels, 90 Mbps
TWO channels, 80 Mbps TW) channels, 60 Mbps
IPV6
To help operators remedy a shrinking ( or already exhausted ) pool of private IPv4
pool
addresses, DOCSIS 3.0 support IPv6, whose main feature is a much larger address
space – 128 bits long compared to IPv4’s 32 bits. It is expected that operators will
operators
support both IPv4 and IPv6 simultaneously for the foreseeable future. This concurrent
future.
support will allow a transition to IPv6 without creating isolated IPv6-only networks or
isolated IPv6-
enlisting a hard cut-over to IPv6. This new specs enable IPv6 provisioning and
cut-
management of cable modems and other DOCSIS 3.0 based consumer premises premises
devices with embedded modems (gateways, multimedia terminal adapters, etc)
adapters,
13. DOCSIS Simplified
DOCSIS 3.0 Security
Enhanced Traffic Encryption:
DOCSIS 3.0 supports the 128 bits Advanced Encryption Standard (AES), a
stronger traffic encryption feature versus the existing DES encryption
algorithm.
Enhanced Provisioning Security:
Additional security features such as early authentication & inscription,
configuration file enforcement, IP address verification, and certificate
revocation help to increase security of the provisioning servers, disrupting
the network and stealing services.
14. DOCSIS Simplified
DOCSIS 3.0 Physical Layer Enhancements
Upstream Frequency Range Extension:
Enables operators to extend the upstream from 5 – 40 MHz to 5 – 85 MHz,
adding 200 Mbps of potential upstream capacity. That extra upstream
bandwidth could be leveraged to support symmetrical business services. To
enable this feature, however operators must move lower analog channels or
go to a all-digital. Additionally, the operators will have to move to more
legacy conditional access system, upgrade amplifiers and fibre nodes, and
use filters to protect legacy CPE devices on the network.
• Last 4 slides from Michelle Kuska, Cablelabs vice-president
16. DOCSIS Simplified
Transfer rate:
Most DOCSIS cable modems have caps (restrictions) on upload and
download rates. These are set by transferring a configuration file to the
modem, via TFTP, when the modem first establishes a connection to the
provider's equipment.
One downstream channel can handle hundreds of cable modems. As the
system grows, the CMTS can be upgraded with more downstream and
upstream ports. If the HFC network is vast, the CMTS can be grouped into
hubs for efficient management.
Some users have attempted to override the bandwidth cap and gain
access to the full bandwidth of the system (often as much as 30 Mbps), by
uploading their own configuration file to the cable modem - a process
called uncapping. Uncapping is almost always a violation of the Terms of
Service agreement and the law
17. DOCSIS Simplified
Trivial File Transfer Protocol (TFTP):
Is a very simple file transfer protocol, with the functionality of a very basic form
of FTP; it was first defined in 1980.
Since it is so simple, it is easy to implement in a very small amount of
memory, an important consideration at that time. TFTP was therefore useful
for booting computers such as routers which did not have any mass storage
devices. It is still used to transfer small files between hosts on a network, such
as when a remote X Windows System terminal or any other thin client boots
from a network host or server.
TFTP is based in part on the earlier protocol EFTP, which was part of the PUP
protocol suite. In the early days of work on the TCP/IP protocol suite, TFTP
was often the first protocol implemented on a new host type, because it was
so simple.
The original versions of TFTP, prior to RFC 1350, displayed a particularly bad
protocol flaw, which was named Sorcerer’s Apprentice Syndrome (after the
Sorcerer’s Apprentice segment of Fantasia) when it was discovered.
Recently, TFTP has been used by computer worms, such as Blaster, as a
method of spreading and infecting new hosts.
18. DOCSIS Simplified
Current and New Offerings:
With a typical rate of 3 Mbps Download per user, only 12 subs would be able
to share a 256 QAM signal simultaneously. Some systems may allows an
over subscription of 100:1 on the DS leading to 1200 subs per subs per DS.
Over subscription is very dependant on the demographics; college town or
suburb?
Increasing a customer’s “cap” to 5 Mbps and using the same model would
produce only 800 subs, but changing the “cap” may not have a linear affect
as predicted or assumed. On one hand, average usage may be less than
extrapolated, but on the other hand, customer that use a lot of P2P services
may look more appealing to others outside the network. For example,
offering a tier service with 15 Mbps per DS would only allow 2*100= 200
subs per DS and hard to justify a business case. Allowing much more over
subscription may be fine. But need to be observed over time.
19. DOCSIS Simplified
Current and New Offerings: (suite)
Customer that actually pay for higher tier service could feel compelled to get
their moneys worth and use more than previous. Also, as customers become
more computer savvy or other applications become prolific, usage could
increase exponentially. This equates to an over subscription calculation that
must be re-evaluate and probably decreased. Now the over subscription of
100:1 may need to be 75:1.
Some cable system have different offering in different part of north America.
One system has 2 tiers with one providing all basic subs with 10 Mbps DS by
1 Mbps US and tier 2 providing high-end customers with 15 Mbps DS and 2
US. Some other cable system also has a 64 QAM trial going on. Advanced
Time Division Multiple Access (ATDMA) as provided by DOCSIS 2.0 allows
higher modulation schemes and channels widths and has been deployed in
some other par of the world for over a year, but just being deployed in North
America.
In all the case above, customer are working toward 600-1000 subscribers on
a single DS.
20. DOCSIS Simplified
New Technology Cornerstones:
New technologies are being pursued to address the DS bottleneck
conundrum. DOCSIS 3.0 uses a channel bonding technique to achieve
higher capacity link, enable faster high speed data (HSD) service, and
provide M x N MAC domain to enable Video over IP solutions.
The modular CMTS (M0CMTS) architecture is promoted to achieve better
DOCSIS economics, lower cost DS PHY, and de-couple DS and US ports.
One day we may see fibre optic node with DOCSIS physical layer chips
embedded so we can use INGRESS cancellation at the node, digital links
from the node back to the headend without the need to amplify, and no more
laser clipping.
Of course, this mean all traffic needs to be DOCSIS-based in North America.