DETERMINISTIC DISTRIBUTED NETWORK CODING
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Abstract
A network and a communication method are described. The network comprises: source nodes, receiver nodes, and coding nodes. The coding nodes are connected with input links for communication of input signals to the coding nodes and output links for communication of output signals from the coding nodes. The output signals are a linear combination of the input signals. The coefficients of the linear combination are deterministically chosen based on local information available locally at the coding node.
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Citations
20 Claims
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1-3. -3. (canceled)
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4. A network comprising:
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one or more source nodes; one or more receiver nodes; and coding nodes, allowing communication of source processes to each receiver node, the coding nodes being connected with input links for communication of input signals to the coding nodes and output links for communication of output signals from the coding nodes, wherein the output signals from the coding nodes are a linear combination of the input signals, a plurality of said coding nodes being configured to generate coefficients of the linear combination using local node numbers or alternatively local link numbers as inputs to a deterministic mapping from the local node numbers or alternatively from local link numbers to the coefficients of the linear combination, wherein the linear combination of processes transmitted from the one or more source nodes present in each signal in the network is specified as a vector of the coefficients, each coefficient corresponding to a process to be transmitted from one or more source nodes, and wherein said coding nodes are configured to update and to transmit the vector of coefficients by applying to the vector of coefficients linear combinations, wherein the linear combinations applied to the vector of coefficients are the same as the linear combinations applied to data transmitted through the network. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. A method for transmitting processes from one or more sources to each receiver of one or more receivers in a network, the method comprising:
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providing coding nodes between the one or more sources and the one or more receivers; providing, for each coding node, input links for transmitting input signals to the coding node, and output links for transmitting output signals from the coding node, the output signals being a linear combination of the input signals; and generating at a plurality of said coding nodes coefficients of the linear combination using local node numbers or alternatively local link numbers as inputs to a deterministic mapping from the local node numbers or alternatively from local link numbers to the coefficients of the linear combination, wherein the linear combination of processes transmitted from the one or more source nodes present in each signal in the network is specified as a vector of the coefficients, each coefficient corresponding to a process to be transmitted from the one or more source nodes, and wherein the vector of coefficients is transmitted through the network and updated at said coding nodes by applying to the vector of coefficients linear combinations, wherein the linear combinations applied to the vector of coefficients are the same as the linear combinations applied to data transmitted through the network. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A network comprising:
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one or more source nodes; one or more receiver nodes; and coding nodes, allowing communication of source processes to each receiver node, the coding nodes being connected with input links for communication of input signals to the coding nodes and output links for communication of output signals from the coding nodes, wherein the output signals from the coding nodes are a linear combination of the input signals, a plurality of said coding nodes being configured to generate coefficients of the linear combination using local node numbers or alternatively local link numbers as inputs to a deterministic mapping from the local node numbers or alternatively from local link numbers to the coefficients of the linear combination, wherein said mapping is a modular operation, said coding nodes being configured to generate said coefficients as a linear combination mod q of the local node numbers or alternatively of the local link numbers, wherein q is a constant, the linear combination of processes transmitted from the one or more source nodes present in each signal in the network is specified as a vector of the coefficients, each coefficient corresponding to a process to be transmitted from one or more source nodes, and wherein said coding nodes are configured to update and to transmit the vector of coefficients by applying to the vector of coefficients linear combinations, wherein the linear combinations applied to the vector of coefficients are the same as the linear combinations applied to data transmitted through the network.
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Specification