Methods and apparatus for inter-cell interference coordination self-organized network

摘要

A method of resource allocation for use in a wireless network is disclosed. A network coloring decision to assign a plurality of resource blocks to a plurality of cells within the wireless network is triggered upon occurrence of a network event. A network coloring is performed by assigning each cell of the plurality of cells a resource block from the plurality of resource blocks. An effect of interference among adjacent cells with a same resource block assignment is reduced as measured by a network performance metric related to a number of resource block assignment conflicts over the plurality of cells.

主权项

1. A method of resource allocation for use in a wireless network, the method comprising:
triggering, upon occurrence of a network event, a network coloring decision to assign a plurality of resource blocks to a plurality of cells within the wireless network; and performing a network coloring by assigning each cell of the plurality of cells a resource block from the plurality of resource blocks, wherein an effect of interference among adjacent cells with a same resource block assignment is reduced as measured by a network performance metric related to a number of resource block assignment conflicts over the plurality of cells, wherein the network performance metric is in accordance with a network neighboring relation table (NRT) maintained for the network, and the network NRT comprises a matrix of size n*n elements, wherein n is a number of the plurality of cells, wherein an element Bij of the matrix is Bij=Aij+Aji, whereinAij=1Ni⁢(∑k=1Ni⁢Aijk)is a first metric that indicates an interference from a cell j to a cell i, which is caused by an assigned resource block of the cell j measured by all UEs over a period of time Ni at each time instant k in the cell i,
whereinAji=1Nj⁢(∑k=1Nj⁢Ajik)is a second metric that indicates an interference from the cell i to the cell j, which is caused by an assigned resource block of the cell i measured by all UEs over a period of time Nj at each time instant k in the cell j, and
wherein Ajik and Aijk are each a relative measurement of an interference to a UE measured at time instant k.