Internet telephone system ensuring communication quality and path setting method

A path setting method of setting a path to which a band is ensured on a network using an Internet protocol connected between a first voice network and a second voice network to execute voice communication between a telephone subscribing to said first voice network and a telephone subscribing to said second voice network, comprising the steps of:

• determining whether or not there is a path having a residual band larger than a band necessary for transferring a VolP packet between two edge label switch routers by a path control unit;
• and
• setting a new path having a band that is equal to or more than a double band of said necessary band between said two edge label switch routers by said path control unit, when it is determined that there is not said path.

A call control apparatus for setting a path to which a band is ensured on a network using an Internet protocol connected to a first voice network and a second voice network to execute voice communication between a telephone subscribing to said first voice network and a telephone subscribing to said second voice network, comprising:

• a path control unit which determines whether or not there is a path having a residual band larger than a band necessary for transferring a VolP packet between two edge label switch routers and, when it is determined that there is not said path, sets a new path having a band that is equal to or more than a double band of said necessary band between said edge label switch routers;
• and
• a packet control unit which controls a media gateway connected to said two edge label switch routers to transfer said VolP packet via a path having said residual band or said new-set path.

A router used for a network using an Internet protocol connected between a first voice network and a second voice network to implement voice communication between a telephone subscribing to said first voice network and a telephone subscribing to said second voice network, wherein

• said router sets a path having a band that is equal to or more than a double band of a band necessary for transferring a VolP packet in accordance with control by a call control apparatus, thereby establishing a plurality of connections in said path.

A computer program product for implementing a call control apparatus for setting a path to which a band is ensured on a network using an Internet protocol connected between a first voice network and a second voice network to execute voice communication between a telephone subscribing to said first voice network and a telephone subscribing to second voice network, wherein said computer program product comprises the steps of:

• determining whether or not there is a path having a residual band larger than a band necessary for transferring a VolP packet between two edge label switch routers and setting, when it is determined that there is not said path, a new path having a band that is equal to or more than a double band of said necessary band between said label switch routers;
• and
• controlling a media gateway connected to said two edge label switch routers to transfer said VolP packet via the path having the residual band larger than said necessary band or said new-set path.