DOCSIS as a Foundation for Residential in .NET framework

Create QR Code ISO/IEC18004 in .NET framework DOCSIS as a Foundation for Residential
DOCSIS as a Foundation for Residential
QR Scanner In .NET
Using Barcode Control SDK for Visual Studio .NET Control to generate, create, read, scan barcode image in VS .NET applications.
CMTS clock time to send SYNC clock time to send UCD clock time to send SYNC SYNC SYNC UCD
Create QR-Code In VS .NET
Using Barcode generator for VS .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
CM CM gets data to transmit and waits for a MAP with REQ, REQ/DATA
Denso QR Bar Code Reader In .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
time to send MAP Receive request and get ready to send short/long data grant in the next MAP
Making Bar Code In Visual Studio .NET
Using Barcode drawer for .NET Control to generate, create barcode image in .NET applications.
MAP Request
Scan Barcode In VS .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
Make and send a data grant request
QR Code 2d Barcode Maker In C#.NET
Using Barcode encoder for .NET Control to generate, create QR image in .NET framework applications.
time to send MAP
Drawing QR Code In .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code 2d barcode image in ASP.NET applications.
Look for a short/long data grant and the time to send At the time to send, send the data
QR Code Printer In VB.NET
Using Barcode creator for VS .NET Control to generate, create QR-Code image in .NET applications.
Data
EAN-13 Supplement 5 Drawer In .NET
Using Barcode creation for VS .NET Control to generate, create EAN 13 image in .NET applications.
Figure 135 Typical upstream data transmission
ECC200 Generation In VS .NET
Using Barcode creator for .NET framework Control to generate, create Data Matrix 2d barcode image in .NET framework applications.
time required, or the time delay, in the RDS cycle is thus the real bottleneck in the upstream throughput performance Thus, more delay in the RDS cycle means more waiting for new packets and more packets being dropped (as the CM cannot request another data grant if a previous request is pending), thus leading to smaller throughput and higher latency To improve the throughput and latency of the upstream there are several performance enhancers, such as concatenation, piggybacking and fragmentation, and a set of QoS services, such as an unsolicited grant service (UGS), an unsolicited grant service with activity detection (UGS-AD), real-time polling (rtPS), and non real-time polling (nrtPS), that aim to control the delay in the RDS cycle These parameters are set by using the con guration le that the CM downloads during registration
GTIN - 128 Creator In VS .NET
Using Barcode drawer for .NET Control to generate, create GS1 128 image in .NET applications.
13231 Performance enhancers Concatenation If the CM has several packets to send it can save on time for multiple RDS cycles per packet and also on per packet overhead by concatenating and sending many packets together The CM must, however, know the nal concatenated packet size and request for a data grant accordingly Piggybacking The CM, while sending the data upstream at the time allocated by the CMTS, can put an extended header on the data packet to request additional data grants The CM totally bypasses
Paint DUN - 14 In VS .NET
Using Barcode printer for .NET Control to generate, create ITF14 image in .NET applications.
Broadband Services
Code 3 Of 9 Generator In Java
Using Barcode generation for Java Control to generate, create Code39 image in Java applications.
the collision phase in the RDS cycle this way and can keep on requesting additional data grants as long as it has data to send Fragmentation There can be times when the CMTS can give a smaller data grant than that requested by the CM In this case, the CM can either not use the data grant and request again, or it can fragment the packet and send as much as possible in that grant The CMTS will send a smaller grant when it is overloaded with data grant requests from many CMs
Encode Data Matrix ECC200 In Visual C#.NET
Using Barcode creator for .NET framework Control to generate, create ECC200 image in .NET applications.
13232 QoS services The DOCSIS 11 and 20 speci cations [3, 6] support a series of scheduling service guarantees, as required by the applications Unsolicited grant service (UGS) This service is supported for real-time traf c, characterized by xed size packets at xed intervals, such as VoIP telephone calls It directly gives data grants to the CM at regular intervals, thus completely bypassing the RDS cycle Real-time polling service (rtPS) This service is supported for real-time traf c, characterized by variable size packets at xed intervals, such as MPEG video In this case, the CMTS sends unicast REQ opportunities to the CM, thus bypassing the collision phase of the RDS cycle The CM then requests the data grant size it wants and gets to transmit the data within the speci ed interval Unsolicited grant service with activity detection (UGS-AD) This service is supported for real-time traf c, characterized by an inactive state for a substantial period of time followed by a period of xed size, a xed interval active state A VoIP call with silence suppression is a good example that uses this service This can be imagined as a combination of RTP and UGS, where the CMTS sends unicast poll/request opportunities to the CM in the inactive state and sends xed size data grants at regular intervals in the active state Non real-time polling service (nrtPS) This service is supported for non real-time traf c, characterized by variable size packets at regular intervals, such as high-bandwidth FTP The CMTS just provides unicast request opportunities to the CM at regular intervals This ensures that the CM gets at least some request opportunities in cases of network congestion Best effort (BE) This is not a guaranteed service, the CM has to go through the RDS cycle and the CMTS does its best to provide as many data grants as it can Internet browsing applications are generally put on a best effort scheduling service This is the default service when no other scheduling service is speci ed The most recent DOCSIS 20 speci cation has provided a signi cant bandwidth upgrade and increased the upstream capacity to 30 Mbps
EAN-13 Reader In .NET Framework
Using Barcode reader for .NET Control to read, scan read, scan image in .NET applications.
Printing UPC Code In Java
Using Barcode generation for Java Control to generate, create UPC-A Supplement 2 image in Java applications.
Barcode Creator In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Creating Barcode In VB.NET
Using Barcode creator for .NET Control to generate, create bar code image in .NET framework applications.