Communication apparatus

A communication apparatus used in a network where data communication is performed, the communication apparatus comprising:

• a priority data information holding section configured to hold, in advance, QoS (Quality of Service) setting information corresponding to domain names, the QoS setting information being necessary to perform a QoS setting for data communicated in the network;
• a control packet snooping section configured to detect a DNS (Domain Name System) packet transmitted to a DNS server in the network for determining a QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, or detect a DNS response packet, which is a response to the DNS and received from the DNS server, for determining the QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, and configured to obtain a domain name contained in the DNS packet or in the DNS response packet;
• a priority control setting section configured to, when QoS setting information corresponding to the obtained domain name exists in the QoS setting information held in the priority data information holding section, perform, based on the QoS setting information, a QoS setting for actual data communication performed by a communication apparatus which is the transmission source of the DNS packet;
• and
• a priority communication apparatus information storing section configured to store priority communication apparatus information which indicates information about a communication apparatus which is the transmission source of the DNS packet and which communicates priority data whose communication quality is to be assured, the priority data being among the data communicated in the network,
• wherein the priority control setting section further performs, based on the priority communication apparatus information, a QoS setting for data communication performed by the communication apparatus which is the transmission source of the DNS packet, and
• wherein the control packet snooping section specifies a provided service based on the domain name contained in the DNS packet or in the DNS response packet, and
• based on the provided service and the QoS setting information, the priority control setting section performs, for the provided service, a QoS setting for data communication performed by the communication apparatus which is the transmission source of the DNS packet.

A communication apparatus used in a network where data communication is performed, the communication a apparatus comprising:

• a priority data information holding section configured to hold, in advance, QoS (Quality of Service) setting information corresponding to domain names, the QoS setting information being necessary to perform a QoS setting for data communicated in the network;
• a control packet snooping section configured to detect a DNS (Domain Name System) packet transmitted to a DNS server in the network for determining a QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, or detect a DNS response packet, which is a response to the DNS and received from the DNS server, for determining the QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, and configured to obtain a domain name contained in the DNS packet or in the DNS response packet;
• a priority control setting section configured to, when QoS setting information corresponding to the obtained domain name exists in the QoS setting information held in the priority data information holding section, perform, based on the QoS setting information, a QoS setting for actual data communication performed by a communication apparatus which is the transmission source of the DNS packet;
• and
• a priority communication apparatus information storing section configured to store priority communication apparatus information which indicates information about a communication apparatus which is the transmission source of the DNS packet and which communicates priority data whose communication quality is to be assured, the priority data being among the data communicated in the network,
• wherein the QoS setting information includes priority data identification information used for identifying priority data which is communicated in the provided service and whose communication quality is to be assured, and
• the priority control setting section further performs a QoS setting for the priority data, based on the priority communication apparatus information and the priority data identification information, and
• wherein the control packet snooping section specifies a provided service based on the domain name contained in the DNS packet or in the DNS response packet, and
• based on the provided service and the QoS setting information, the priority control setting section performs, for the provided service, a QoS setting for data communication performed by the communication apparatus which is the transmission source of the packet.

A communication apparatus used in a network where data communication is performed, the communication apparatus comprising:

• a priority data information holding section configured to hold, in advance, QoS (Quality of Service) setting information corresponding to domain names, the QoS setting information being necessary to perform a QoS setting for data communicated in the network;
• a control packet snooping section configured to detect a DNS (Domain Name System) packet transmitted to a DNS server in the network for determining a QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, or detect a DNS response packet, which is a response to the DNS and received from the DNS server, for determining the QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, and configured to obtain a domain name contained in the DNS packet or in the DNS response packet;
• and
• a priority control setting section configured to, when QoS setting information corresponding to the obtained domain name exists in the QoS setting information held in the priority data information holding section, perform, based on the QoS setting information, a QoS setting for actual data communication performed by a communication apparatus which is the transmission source of the DNS packet,
• wherein the QoS setting information includes priority data characteristic information which indicates a transmission characteristic with respect to priority data which is communicated in the provided service and whose communication quality is to be assured, and
• the priority control setting section further performs a QoS setting for the priority data, based on the priority data characteristic information, and
• wherein the control packet snooping section specifies a provided service based on the domain name contained in the DNS packet or in the DNS response packet, and
• based on the provided service and the QoS setting information, the priority control setting section performs, for the provided service, a QoS setting for data communication performed by the communication apparatus which is the transmission source of the DNS packet.

A QoS (Quality of Service) setting method performed by a communication apparatus used in a network where data communication is performed, the QoS setting method comprising:

• a priority data information holding step of holding, in advance, QoS setting information corresponding to domain names, which QoS setting information is necessary to perform a QoS setting for data communicated in the network;
• a control packet snooping step of detecting a DNS packet received from a DNS (Domain Name System) server in the network for determining a QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, or detecting a DNS response packet, which is a response to the DNS packet and received from the DNS server, for determining the QoS setting for data communication by the communication apparatus and prior to data communication that is subjected to QoS processing, and of obtaining a domain name contained in the DNS packet or in the DNS response packet;
• and
• a priority control setting step of, when QoS setting information corresponding to the domain name obtained in the control packet snooping step exists in the QoS setting information held in the priority data information holding step, performing, based on the QoS setting information, a QoS setting for actual data communication performed by a communication apparatus which is the transmission source of the DNS packet,
• wherein the control packet snooping step specifies a provided service based on the domain name contained in the DNS packet or in the DNS response packet, and
• based on the provided service and the QoS setting information, the priority control setting step performs, for the provided service, a QoS setting data communication performed by the communication apparatus which is the transmission source of the DNS packet, and
• wherein the QoS setting information includes priority data identification information used for identifying priority data which is communicated in the provided service and whose communication quality is to be assured, and
• the priority control setting step further performs a QoS setting for the priority data, based on the priority data identification information.