Method and apparatus for packet routing
First Claim
1. A method of routing a packet in a network, the network having a topology characterized by a hierarchical structure of nodes comprising n layers wherein n is an integer greater than 1 and each of the n layers is represented by L being an integer from 0 to n−
- 1 with L=0 representing a lowest layer and L=n−
1 representing a highest layer in the hierarchical structure and wherein the n layers comprise n−
1 layers of switch nodes and 1 layer of computational nodes, the method comprising;
receiving at least a packet header of a packet at a first node, wherein the first node is a switch node included in the layer of switch nodes represented by L;
based on a destination address included in the packet header, determining whether to transmit the packet to a second node in either layer L, layer L+1, or layer L−
1; and
beginning transmission of the packet to the second node without waiting to receive the entire packet at the first node and without copying the packet prior to transmission from the first node;
wherein the destination address identifies a destination comprising a computational node included in the 1 layer of computational nodes and the packet is not copied to a memory until received at the destination comprising the computational node.
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Accused Products
Abstract
Methods and apparatus for routing a packet in a network are described. The network has a topology characterized by a hierarchical structure of nodes including n layers. L represents a layer in the structure and is an integer with L=0 representing a lowest layer and L=n−1 representing a highest layer. The method includes receiving at least a packet header of a packet at a first node and based on the packet header, determining whether to transmit the packet to a second node in either layer L, layer L+1, or layer L−1. The packet can be transmitted to the second node as soon as the packet is received at the first node without waiting to receive the entire packet and without copying the packet prior to transmission from the first node.
25 Citations
10 Claims
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1. A method of routing a packet in a network, the network having a topology characterized by a hierarchical structure of nodes comprising n layers wherein n is an integer greater than 1 and each of the n layers is represented by L being an integer from 0 to n−
- 1 with L=0 representing a lowest layer and L=n−
1 representing a highest layer in the hierarchical structure and wherein the n layers comprise n−
1 layers of switch nodes and 1 layer of computational nodes, the method comprising;receiving at least a packet header of a packet at a first node, wherein the first node is a switch node included in the layer of switch nodes represented by L; based on a destination address included in the packet header, determining whether to transmit the packet to a second node in either layer L, layer L+1, or layer L−
1; andbeginning transmission of the packet to the second node without waiting to receive the entire packet at the first node and without copying the packet prior to transmission from the first node; wherein the destination address identifies a destination comprising a computational node included in the 1 layer of computational nodes and the packet is not copied to a memory until received at the destination comprising the computational node. - View Dependent Claims (2)
- 1 with L=0 representing a lowest layer and L=n−
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3. A system comprising:
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a hierarchical structure of nodes comprising n layers, wherein n is an integer greater than 1 and the n layers comprise n−
1 layers of switch nodes and 1 layer of computational nodes, where each layer in the hierarchical structure includes one or more units of nodes, a unit comprising a set of nodes, where each of the n layers is represented by L being an integer from 0 to n−
1 with L=0 representing a lowest layer and L=n−
1 representing a highest layer and a number of nodes in a unit is greater than 1;where the switch nodes are configured to; receive at least a packet header of a packet; based on a destination address included in the packet header, determine whether to transmit the packet to a second node in either layer L, layer L+1, or layer L−
1; andbegin transmission of one or more packets comprising a message to the second node without waiting to receive the entire packets at the switch node and without copying the packets prior to transmission from the switch node; wherein the destination address identifies a destination comprising a computational node included in the 1 layer of computational nodes and the packet is not copied to a memory until received at the destination comprising the computational node. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification