ingress egress lte_keith_mothersdale_angacom 2014

Enabling digital evolution

Teleste Proprietary. All rights reserved.

INGRESS/EGRESS/LTEThe Imperative To Improve The In-home Interconnect

Keith MothersdaleHead Of Engineering Passives and Indoor


Stop parties in your drop


Migrating from DOCSIS® 3.0 to 3.1 “The Challenge”

Should we first learn to walk before we can run?The DROP = GATEWAY to the broadband network

Total throughput = throughput of DROP * throughput of other network partsNothing times a lot of is still nothing

Drop

Head-EndBackbone

Node

HE & Backbone & Node

Drop

Investments Maintenance costs

CableLabs is owner of the trademark DOCSIS®

Throughputbefore

Throughputafter


Migrating from DOCSIS 3.0 to 3.1 “The Challenge”

What is key to success

• Network reliability & performance• Quality of Service all the way in to the home• Customer satisfaction

Do we have this today?



Work in progress!

• Bad contacts • Poor connections• Damaged cables• Intermodulation• Common Path Distortion (CPD)• Ingress/Egress!• Screening effectiveness of the in-home domain!



Ingress• 90% induced by subscribers• Ingress perceived as an upstream issue• Ingress perceived as a network issue• DOCSIS 3.1 will allow higher modulation schemes with current

network C/N but what about to day (Can we take our foot of the gas)?

New Kids On The Block• Down Stream ingress C/N interference• Down Stream egress interfering with wireless services


Can ingress/egress get any worse?

New services being deployed

• Deployments in CATV Band (700 -1200MHz)

• Higher powered handsets and base stations

• CPE equipment sensitive to LTE interference

• Regulatory obligation not to transmit CATV signals outside of closed network (Egress)


The problem

Ingress/Egress/LTE interconnect RFI shielding effectiveness

• Open ports of wall sockets

• Open ports of passive splitters and taps

• Loose RF connectors

• Open RF connectors

• Poor or damaged RF cables


The problem and the solution, RFI shielding

Standard open F male BarrIER® F male



In-Home amplifier, ports open In-Home amplifier with BarrIER®



Two way splitter, one port open Two way splitter with BarrIER®


4G LTE interference on digital 256QAM carriers 3.0 CM


4G LTE interference on digital QAM carriers, 3.0 CM

Open F Male Connector


Frequency (Hz) Throughput (Mb/s) DS Level (dBmV) DS MER (dB) V/M Field600000000 0 0 0 1.03632000000 0 0 0 1.84648000000 0 -10 31.9 1.83664000000 5.16 -10.7 34.3 1.76680000000 5.1 -10.2 33.8 1.87696000000 5 -9.8 34.7 1.84712000000 0 0 0 1.87744000000 0 0 0 1.85776000000 0 0 0 1.85792000000 0 0 0 1.83808000000 0 0 0 1.8824000000 0 0 0 1.82840000000 0 0 0 1.82856000000 0 0 0 1.8872000000 0 0 0 1.86

4G LTE interference on digital 256QAM carriers, 3.0 CM


4G LTE Interference on Digital QAM carriers, 3.0 CM

Open F male



Open F Male Connector with BarrIER®


4G LTE Interference on Digital 256QAM carriers, 3.0 CM

Frequency (Hz) Throughput (Mb/s) DS Level (dBmV) DS MER (dB) (V/M Field)600000000 5,00 -9.4 31.2 6.17648000000 4.99 -10.9 33.2 5.88664000000 5.03 -10.4 31.4 6.22680000000 4.98 -11.2 30.5 6.22712000000 5.07 -10.1 31 6.21744000000 5.02 -10.7 33.4 6.1776000000 5.07 -10.5 31.9 6.48792000000 5.38 -10.3 30.2 6.42808000000 5.10 -11.1 33.7 6.14824000000 4.99 -10.9 33.2 5.88856000000 5.14 -12 29.7 5.58872000000 5.06 -12 34.2 6.8888000000 5.02 -12 34.2 5.69904000000 5.31 -12 34.3 6.06920000000 5.07 -11.9 34.3 6.87



Open F male with BarrIER®

575000000 675000000 775000000 875000000-15

-10

-5

0

5

10

15

20

25

30

35

40

Throughput MBits/Sec

DS Trans-ferred MB

DS Power Level dBmV

DS MER dB

V/M Field

Frequency MHz


4G LTE interference on digital 256QAM carriers, STB

Open F Male Connector Flylead


4G LTE Interference on digital 256QAM carriers, STB

Frequency (Hz) AGC PVR Power (dBmV) PVR MER / SNR Corr Post BER V/M Field600000000 34 -8,3 34 0 0,52648000000 34 -9 35 0 0,21664000000 34 -9,1 35 0 0,26680000000 34 -8,8 33 0 0,26712000000 34 -8,4 0 0 0744000000 34 -8 33 0 0776000000 34 -8,9 0 0 0,38792000000 34 -8,7 31 250 0,47808000000 34 -10,7 30 975 0,52824000000 34 -7,9 30 700 0,52856000000 34 -10,2 30 1800 0872000000 34 -10,9 35 0 0888000000 36 -10,6 34 0 0896000000 37 -11 34 0 0904000000 39 -12,1 32 0 0


4G LTE Interference on Digital QAM carriers, STB

BarrIER® Open F Male Connector


4G LTE Interference on Digital 256 QAM carriers, STB

Frequency (Hz) AGC PVR Power (dBmV) PVR MER / SNR Corr Post BER V/M Field600000000 62 -9,5 32 0 17,6648000000 62 -9,6 32,3 0 15,02664000000 63 -9,7 33,7 0 14,94680000000 64 -10,4 33,5 0 16,67712000000 58 -10,5 31 0 13,79744000000 58 -10,1 32,9 0 14,51776000000 58 -10 35,7 0 14,13792000000 58 -9,9 38,7 0 11,77808000000 60 -10,6 32,8 0 13,97824000000 58 -9,7 34,9 0 13,89856000000 59 -10,2 31,2 0 10,41872000000 58 -9,5 32,6 0 11888000000 59 -9,6 31,7 0 10,33896000000 58 -8,9 36 0 9,42904000000 59 -9,2 35,5 0 8,9


Network signals interfering with LTE (Egress)

A 15dBmV CATV signal feeding 30 feet of coax with an open F male connector will interfere with an LTE handset at 6 feet


THANKS!

ingress egress lte_keith_mothersdale_angacom 2014

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