US 2007/0165634 A1 · Internet group membership protocol network device and signal processing control method thereof in IP digital broadcasting system

Abstract

An Internet group membership protocol (IGMP) network device and a signal processing control method thereof in an Internet protocol (IP) digital broadcasting system are provided. The method includes: when an IGMP packet is received from an IGMP client, determining, at a packet transmission/reception unit, whether or not the received IGMP packet is transmitted via bypass; when it is determined that the IGMP packet received from the IGMP client is transmitted via bypass, copying, at the packet transmission/reception unit, the received IGMP packet and bypass-transmitting an original IGMP packet to an upper IGMP network device; transmitting, at the packet transmission/reception unit, the copied IGMP packet to a host; and receiving, at the host, the IGMP packet from the packet transmission/reception unit, processing the IGMP packet, and simultaneously updating its multicast table and a multicast table of the packet transmission/reception unit.

Claims21

Dependent claims

A signal processing control method of an Internet group membership protocol network device in an Internet protocol digital broadcasting system, the method comprising:

when an Internet group membership protocol packet is received from an Internet group membership protocol client, determining, at a packet transmission and reception unit, whether or not said received Internet group membership protocol packet is transmitted via bypass;
when it is determined that said Internet group membership protocol packet received from said Internet group membership protocol client is transmitted via bypass, copying, at said packet transmission/reception unit, said received Internet group membership protocol packet and bypass-transmitting an original Internet group membership protocol packet to an upper Internet group membership protocol network device;
transmitting, at said packet transmission and reception unit, the copied Internet group membership protocol packet to a host;
and
receiving, at said host, said Internet group membership protocol packet from said packet transmission and reception unit, processing said Internet group membership protocol packet, and simultaneously updating its multicast table and a multicast table of said packet transmission and reception unit.

2 more elements

An Internet group membership protocol network device in an Internet protocol (IP) digital broadcasting system, the device comprising:

a packet transmission and reception unit for, upon receipt of an Internet group membership protocol packet from an Internet group membership protocol client, determining whether or not said Internet group membership protocol packet is transmitted via bypass, copying said received Internet group membership protocol packet and transmitting said copied Internet group membership protocol packet to an upper Internet group membership protocol network device and a host when it is determined that said Internet group membership protocol packet is transmitted via bypass, and transmitting said received Internet group membership protocol packet to said host when it is determined that said Internet group membership protocol packet is not transmitted via bypass;
and
said host for receiving said Internet group membership protocol packet from said packet transmission and reception unit, processing said Internet group membership protocol packet, updating its multicast table, and, if necessary, updating a multicast table of said packet transmission and reception unit.

A signal processing control method of an Internet group membership protocol network device in an Internet protocol digital broadcasting system, the method comprising:

when an Internet group membership protocol query is received from an upper Internet group membership protocol network device, transmitting, at a packet transmission and reception unit, said signal processing Internet group membership protocol query to all Internet group membership protocol clients, respectively, and receiving an Internet group membership protocol response report from each of said Internet group membership protocol clients as a response to said Internet group membership protocol query;
bypass-transmitting, at said packet transmission and reception unit, only a first received Internet group membership protocol response report to an upper Internet group membership protocol network device;
transmitting, at said packet transmission and reception unit, said Internet group membership protocol response report received from each of said Internet group membership protocol clients to said host;
and
updating, at said host, its multicast table through said Internet group membership protocol response report received from said packet transmission and reception unit.

2 more elements

Dependencies are inferred from the claim text.

Internet group membership protocol network device and signal processing control method thereof in IP digital broadcasting system

Life of this patent

Internet group membership protocol network device and signal processing control method thereof in IP digital broadcasting system

Life of this patent

Abstract

Claims21