Inter-Cell Interference Prediction for Frequency Resource Allocation

• US 20100240380A1
• Filed: 03/20/2009
• Published: 09/23/2010
• Est. Priority Date: 03/20/2009
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Inventors: Zhang, Jinyun, Yim, Raymond
• Granted Patent: US 8,036,674 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method predicts resource allocations in a wireless network including a set of base stations (BSs). Each BS is in a cell, and serves a set of mobile stations. A sequence and rule of resource allocations are defined for all of the BSs. Previous resource allocations are acquired from the BSs in adjacent cells. In each BS, for a next allocation, inter-cell interference (ICI) is predicted independently for the set of MSs in the cell based on the previous resource allocations by the BSs in the adjacent cells and the sequence and rule of resource allocations. Then, each BS allocates the resources to the MSs in the cell based on the ICI and the previous resource allocations.

Claims

1. A method for predicting resource allocations in wireless network including a set of base stations (BSs), wherein each BS is in a cell, and wherein each BS serves a set of mobile stations in the cell, and wherein each cell is partitioned into a cell center and a set of sectors near edges of the cell, and the resource includes frequencies comprising:

defining a sequence and rule of resource allocations for all of the BSs, wherein the sequence is shared by the set of BSs;

acquiring, by each BS, previous resource allocations from the BSs in adjacent cells;

predicting independently in each BS, for a next allocation, inter-cell interference (ICI) to the set of MSs in the cell based on the previous resource allocations by the BSs in the adjacent cells and the sequence and rule of resource allocations; and

allocating independently by each BS, the resources to the MSs in the cell based on the ICI and the previous resource allocations using the sequence of resource allocations.

2. The method of claim 1, further comprising:

maintaining in a memory, for each BS, the previous resource allocations of the BSs in the adjacent cells and previous resource allocation by the BS.

3. The method of claim 1, wherein a distance between two adjacent BSs is R and the transmission power to the MSs in the sectors is PC, and wherein strong interference I_strong and weak interference I_Weak are respectively

4. The method of claim 1, further comprising:

transmitting, frequency allocation of a base station to an adjacent cell.