1. A non-transitory computer readable medium encoded with computer executable instructions for measuring traffic demand in a packet-switched network, the computer executable instructions defining a method comprising:
receiving data representing network traffic in an Internet Service Provider (ISP) backbone destined for a plurality of destination network addresses;
associating each of the destination network addresses with a set of egress links from the ISP backbone; and
computing network traffic demand by aggregating network traffic traveling between an ingress link to the ISP backbone and a set of egress links from the ISP back bone.
2. The computer readable medium of claim 1 wherein the data is derived from packet flow measurements in an operational network.
3. The computer readable medium of claim 2 wherein the packet flow measurements are obtained at all ingress links in the packet-switched network.
4. The computer readable medium of claim 2 wherein the packet flow measurements are obtained at peering links in the packet-switched network.
5. The computer readable medium of claim 1 wherein a destination prefix address is associated with each set of egress links.
6. A method of measuring traffic demand in a packet-switched network comprising:
receiving data representing network traffic in an Internet Service Provider (ISP) backbone destined for a plurality of destination network addresses;
associating each of the destination network addresses with a set of egress links from the ISP backbone; and
computing network traffic demand by aggregating network traffic traveling between an ingress link to the ISP backbone and a set of egress links from the ISP backbone.
7. The method of claim 6 wherein the data is derived from packet flow measurements in an operational network.
8. The method of claim 7 wherein the packet flow measurements are obtained at all ingress links in the packet-switched network.
9. The method of claim 7 wherein the packet flow measurements are obtained at peering links in the packet switched network.
10. The method of claim 6 wherein a destination prefix address is associated with each set of egress links.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A check valve comprising a plurality of layered sheets to have a valve flow channel formed as a space for fluid passage between the plurality of layered sheets, said check valve allowing a fluid to pass in a forward direction from an inlet to an outlet and blocking a flow of a fluid in a reverse direction from the outlet to the inlet by opening and closing the valve flow channel, wherein
the plurality of layered sheets include a plurality of base sheets including a first side base sheet and a second side base sheet; and at least one valve sheet disposed between the plurality of base sheets,
the valve sheet includes a fixation portion bonded to at least the first side base sheet,
the fixation portion is bonded across the valve flow channel,
a portion on a downstream side of the fixation portion of the valve sheet is separable from the first side base sheet, and
a portion between the valve sheet and the second side base sheet or another valve sheet layered on the valve sheet is formed as the valve flow channel, whereby the check valve blocks the flow of the fluid between an inside and an outside of a storage body through an opening provided on the storage body, and wherein
an entire periphery of the check valve is bonded to the storage body by a storage body fixing seal, and an area from the inlet to the outlet through the valve flow channel is positioned within a region surrounded by the storage body fixing seal,
the valve flow channel along an entire length of the valve sheet is defined by the second side base sheet or said another valve sheet layered on the valve sheet and the valve sheet without breathable sheets positioned therebetween,
a fluid introduction recess recessed in a thickness direction is formed on at least one of the second side base sheet or said another valve sheet layered on the valve sheet constituting the valve flow channel and the valve sheet, and
the fluid introduction recess is provided on the fixation portion of the valve sheet or at a position on the upstream side of the fixation portion, and extends in an up-down direction of the valve flow channel for guiding the fluid along the forward direction.
2. The check valve according to claim 1, wherein
the inlet is positioned on a front surface or a back surface of the check valve,
the outlet is positioned on the back surface or the front surface opposite the inlet, and
the front surface or the back surface of the check valve is along a surface or an inner surface of a storage body.
3. The check valve according to claim 1, wherein
a part of the first side base sheet is formed as a fluid passage portion breathable to allow an air flow in the forward direction to pass through in a front-back direction,
the fluid passage portion is an inlet through which an air flow in the forward direction flows to the inside of the check valve,
the fluid passage portion is disposed on the upstream side of the fixation portion of the first side base sheet, and
the fluid introduction recess is formed from the fluid passage portion to the fixation portion.
4. The check valve according to claim 1, wherein the fixation portion includes a first valve fixing seal and a second valve fixing seal formed on the downstream side of the first valve fixing seal, and the fluid introduction recess is not formed on the second valve fixing seal but is formed at a position including the first valve fixing seal.
5. A storage body to which the check valve according to any one of claims 1 to 4 is attached, wherein
the storage body includes bag sheets made of resin, and
the entire periphery of the check valve is bonded to the inside or the outside of the bag sheet.
6. The check valve according to claim 1, wherein the plurality of base sheets further includes a breathable base sheet, and the valve sheet is positioned between the breathable base sheet and the second side base sheet.
7. The check valve according to claim 1, wherein the fluid introduction recess is a stepwise recess.