Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for distributing multicast group for terminal in digital cable TV district

A cable TV and terminal distribution technology, applied in the direction of cable transmission adaptation, etc., can solve the problem of multicast group occupation conflict and so on

Inactive Publication Date: 2009-08-19
GUANGZHOU DIGITAL MEDIA GRP CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The management capability of the head-end equipment of the user cell of the digital cable TV broadcasting network to the allocation of multicast groups is limited by the buffer of the radio frequency chip. question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The cache of the radio frequency chip of the head-end device can only support a mapping table of up to 70 entries, that is, 70 multicast groups; the radio interface of the head-end device allows simultaneous access to 31 terminal devices; each terminal is required to occupy 2 multicast groups, then the 31 terminals need to occupy at least 62 multicast groups. In the digital cable television community of this embodiment, the method for distributing multicast groups to terminals is to get 64 of the 70 multicast groups and divide them into 62 dynamic groups and 2 static groups, and the static groups are shared by all terminals. The unoccupied dynamic group is used for video programs, and the static group is used for sending notification information.

[0009] Entry serial number multicast group id Terminal ID 1 dynamic group 1 Terminal 1 2 dynamic group 2 Terminal 1 3 dynamic group 3 Terminal 2 4 dynamic group 4 Terminal 2 .....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method of distributing occupied multicast group for terminals when video programs are downloaded and information is sent to each terminal in a user subdistrict of cable casting network. The operating capability of head end equipment in digital cable casting network user subdistrict towards the distribution of multicast group is limited by the buffer memory of radio frequency chip, and in order to solve the occupation collision problem of multicast group when the video programs are downloaded and the message information is sent out, the invention puts forward the method that the digital cable subdistrict distributes multicast group for the terminal. A plurality of supportable multicast groups are divided into two groups of dynamic groups and static groups. The static groups are suitable for the common use of a plurality of terminals, and the transmission of video programs uses the unappropriated dynamic groups and the sending of information uses the communal static groups.

Description

technical field [0001] The invention relates to a method for distributing and occupying a multicast group for a terminal when transmitting video programs and notification information to each terminal in a user cell of a digital cable TV broadcasting network. Background technique [0002] There are multiple user terminals in a user cell of the digital cable TV broadcasting network, and the multicast group needs to be occupied when downloading video programs, and the multicast group also needs to be occupied when downloading notification information to the terminals. The head-end device of the cell divides and manages the multicast group resources and is responsible for allocating multicast group resources for each terminal. The current allocation method is as follows: Assume that the radio frequency interface of the head-end device allows simultaneous access to 31 terminal devices, and It is designed that each terminal can occupy 2 multicast groups at the same time, then the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/10
Inventor 王斌徐冉徐力恒李建华吴颂涛刘明亮王惠斌
Owner GUANGZHOU DIGITAL MEDIA GRP CO LTD