Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Safecom INGRESS GATE technology (Patent p) Essential key element of CMTS-CABLE Modem Synchronization. “Noise” in the cable network is one of the greatest hurdles to applying superior, high-speed data, DOCSIS 3.0 services, requiring high integrity signal transmission. Noise ingress reduces network capacity. Removing noise is the greatest challenge faced by Cable operators as they seek to migrate to 64 QAM and eventually to 256 QAM digital modulations. Ingress Noise? Perhaps an obvious question? Ingress noise—Over-the-air signals (2-ways radio, Off-Air, FM, Electrical noise , etc.) that are inadvertently coupled into the nominally closed coaxial cable distribution system. Ingress noise is difficult to track down and is intermittent in nature. As much as 80% to 90% of noise and ingress on the plant is generated at the Subscriber site. “Funneling Effect” “Funneling Effect” shows the structural defect of “the last two way signal over coax part”. It limits performance of the network, and conceals the superiority of the CMTS-CM Mode. 54-1002MHz 5-42MHz CM 54-1002MHz CATV RF Vidieo Data IP TV PSTN IP CM 1550nm 1310nm CMTS 54-1002MHz 5-42MHz CM 5-42MHz CM Solving the “Funneling Effect” Principle of solving “Funneling Effect” by ingress Gate technology: 1. 2. 3. 4. 5. Cable Modem sends back RF signal use TDM model. Each Cable Modem’s upload time and time slot assignment are controlled accurately by CMTS. At any given time, only one Cable Modem upload signal can take place in the CABLE system. Ingress Gate opens upstream channel only when Cable modem is transmitting. Ingress Gate keeps all other upstream paths closed, therefore only one path at a time can transmit a signal to CMTS. CM 54-1002MHz CATV RF IP TV PSTN IP 54-1002MHz 5-42MHz 1310nm CMTS CM 1:32 5-42MHz CM CM 32 Users Vidieo Data 1550nm Upstream Ingress Noise Test Disconnect from the tap and plug the drop cable directly into the meter. This provides a spectral view of what is getting onto the upstream path from building and transmitting back up the network. Use the 5-65 MHz band. Why Ingress Protection? • Enables full network capacity utilization on the upstream. • Enhances VoIP, DOCSIS and advanced services deployment. • Improves Quality & Service. • Reduces Operational Expenses (OPEX) for Ingress detection and suppression. Safecom’s IngressGate Patent P. technology • Gateway that allows carrier signals from the premises into the network only when the home device is actively transmitting to the upstream • Based on the burst nature of the upstream and the random presence of ingress noise • The technology is embedded into Safecom’s home amplifiers • No need for expensive investment in ingress monitoring systems • Results in dramatic reduction of the ingress levels • No adverse effect on upstream and downstream signals • Future implementation into Directional Couplers (DC) situated at the far end of the network, close to the customer premises Suggested Changes • Add upstream spectrum test to each home installation. • All ingress noise from 5 to 45 MHz must be lower than 30dBmV. • If ingress above design level, simply replace regular home amplifier with safecom IGDA model, Ingress Noise will immediately reduce by min 15dB. • If there is no home amplifier installed simply use Passive forward INGRESS GATE 5dB return for blocking all ingress noise from premises. “Passing” Upstream Failing” Upstream Upstream Ingress Protection with RF Active forward/return gain Cost-effective Patent P. technology for ingress suppression No need for expensive monitoring or useless detection Simple integration outdoor or indoor Plug and play device Best performance in the market Drop amplifier integration Passive Forward/Return available Ingress Gate integrated with Drop Amplifier Block Diagram Demo-Home CATV devices NOT active From CATV Network High Pass Filter Low Pass Filter High Pass Filter Gate Close From customer premises Low Pass Filter INGRESS STOP Upstream ingress gate stops carrier signals from customer premises into the network when the home devices are not actively transmitting. Modem NOT active Ingress Gate integrated with Drop Amplifier Block Diagram Demo-Home CATV devices active From CATV Network High Pass Filter Low Pass Filter High Pass Filter Gate OPEN From customer premises Low Pass Filter Upstream ingress gate allows carrier signals from customer premises into the network only when the home devices are actively transmitting. Modem ACTIVE Ingress gate allows upstream signals from customer premises into the network only when the home devices are actively transmitting. Gate open Gate Closed Competitive analysis Company 1 Company 2 Company 3 Safecom Technology turn the upstream path to ON, OFF, or 6 dB attenuation Frequency Division Ingress detection and 6dB attenuation Usage-based upstream Gate Technology : Open only when Modem transmitting Cost Med High Med Very Low Needs ingress detection system Yes Yes Yes No Installation Network Network Network Home (by customer or technician ) Broadcast continues during installation Disconnect RF signal to large area during installation Disconnect RF signal to large area during installation Disconnect RF signal to large area during installation No RF disconnections during installation Safecom’s IngressGate™ (Patent p.) vs Opposite Phase IngressGate™ Solution Patent p. Opposite Phase concept. Technology Effectiveness Operating principle Solution Opposite phase merging. Operates as upstream gate that opens only when the modem transmits. Partial 0- 6 dB only ingress reduction. Full Assumes ingress noises are at the same phase or from the same source. Based on the burst nature of the return path. Cannot solve ingress problems from customer premises. Solves and blocks all ingress noise from customer premises. 15-35 dB ingress isolation. Thank You