Patent ID: 9730123
Date: 2017-08-08
CPC Classifications: H04W

Claim:
1. A method, executed in a root sequence determiner for a base station controlling a first cell, the first cell associated with at least one root sequence used for cell differentiation on a random access channel, the method comprising: obtaining information on root sequences of neighboring cells, the neighboring cells neighboring the first cell; in response to finding a root sequence conflict between the first cell and a neighboring cell, the neighboring cell having the root sequence conflict denoted as a conflict cell, determining if the conflict cell is of a higher priority than the first cell, the priorities of the first cell and the conflict cell being based on properties of the respective cells, wherein the method comprises finding a root sequence conflict whether the first cell and the neighboring cell are cells served by the same base station or different base stations; and in response to the conflict cell being of a higher priority than the first cell, finding a new root sequence for the first cell that avoids any root sequences of the neighboring cells.