Method for marking coaxial cable broadband access service data flow

Abstract

The invention discloses a method for marking a coaxial cable broadband access service data flow. The method comprises the following steps that: in an uplink direction, a terminal transmits a data packet to a radio frequency interface module, the radio frequency interface module inserts a cycle distance transmission (CDT) label into the header of a data frame of the data packet, and transmits the data packet to a classification forwarding module, and the classification forwarding module maps the CDT label to a service mark supported by an aggregation network; and in a downlink direction, the classification forwarding module inserts a CDT label into the header of an Ethernet frame of the data packet transmitted by the aggregation network, and transmits the data packet to the radio frequency interface module, and the radio frequency interface module receives the data packet, identifies a terminal and a service stream which have the data packet according to the CDT label, and transmits the data packet to a corresponding terminal, wherein the CDT label comprises a class of service (CoS) field and a video identification (VID) field which are combined to specify a specific service stream of a specific terminal. Loose coupling connection between the classification forwarding module and the radio frequency interface module is supported, and the problems about the classification forwarding and priority mapping of a China-data over cable system interface specification (C-DOCSIS) service stream to the upper-layer aggregation network are solved.

Description

technical field [0001] The invention relates to the communication field, in particular to a marking method for coaxial cable broadband access service data flow under the framework of C-DOCSIS access system. Background technique [0002] The C-DOCSIS standard was developed by the State Administration of Radio, Film and Television of China to solve the problem of domestic next-generation broadband access technology and two-way network transformation. Access network and other actual conditions, and the development of China's DOCSIS technical standards. [0003] The head end of C-DOCSIS system is composed of radio frequency interface module, classification forwarding module and system control module. Among them, the classification and forwarding module under the C-DOCSIS access system architecture and the radio interface module need to identify the service flow in the uplink and downlink directions, so as to provide support for QoS processing of service packets in the convergen...

AI Technical Summary

Problems solved by technology

[0004] The DOCSIS system design in the prior art does not provide this standard interface, so it cannot support the distributed implementation of the classification forwarding module and the radio frequency interface module based on standard interoperability

At the same time, how to realize the service differentiation of DOCSIS uplink and downlink service flows and the data marking of each user and each service flow, and how to classify and forward service flows and map priority to the upper-layer convergence network (especially the passive optical network PON network), currently There are no relevant applications and specifications in the traditional DOCSIS system, and it is difficult to solve technical problems such as classification, forwarding and priority mapping of DOCSIS service flows on the existing PON network

Images