Method and arrangement for resource allocation for coded multidirectional relaying

摘要

The present invention relates to a method and a network coding node for resource allocation applicable to multi-directional network coding in an exchanging system. By estimating the number of bits per resource element (steps 402, 404) on uplink channels to a network coding node (200, 304, 504, 604), the number of resource elements for the sending on said uplinks is determined (step 410) to fully utilize the resources, i.e. such that link underutilization is avoided as well as incorporation of delays are avoided. The number of resource elements is decided such that the data transmitted to the network coding node is provided to end-nodes (302, 306, 502, 506, 602, 606) by sending one and the same representation of the data from a first and a second end-node, to said first and second end-nodes enabling extracting data originated from the differing end-node.

主权项

1. A method in a network coding node, said network coding node configured to receive a first stream of bits from a first node, receive a second stream of bits from a second node and provide said first and second stream of bits to said second and first nodes, respectively, using network coding, the method comprising:
the network coding node estimating a first number of bits per resource element to be received from said first node, the network coding node estimating a second number of bits per resource element to be received from said second node, the network coding node determining a first and a second number of resource elements for the first and second node, respectively, the network coding node allocating the first number of resource elements to the first node for providing said first stream of bits from the first node to the network coding node, and the network coding node allocating the second number of resource elements to the second node for providing said second stream of bits from the second node to the network coding node, wherein said step of determining the first and second number of resource elements comprises fitting the bits received from each one of said first node and said second node in an equal integer number of resource elements being allocated for providing said first and second stream of bits from the network coding node to said second and first nodes, respectively, using network coding.