公开(公告)号：EP2238537A1

公开(公告)日：2010-10-13

申请号：EP09705520.6

申请日：2009-01-29

申请人： Telcordia Technologies, Inc.

发明人： KRISHNAN, Komandur, R. ,  LUSS, Hanan ,  SHALLCROSS, David, F. ,  NEIDHARDT, Arnold, L.

IPC分类号： G06F11/00

CPC分类号： G06F11/079 ,  G05B23/0248 ,  G05B23/0278 ,  G06F11/0706

摘要： A method for distributed computations for fault-diagnosis in a system whose fault propagation model has deterministic couplings between faults and symptoms includes creating a 'relation graph' in which the nodes correspond to the potential faults, with two nodes connected by a 'relational link' if their corresponding faults have an observed symptom in common. The relation graph is then partitioned into several domains, while minimizing the number of cross-domain relational links, which correspond to cross- domain symptoms. In each domain, all the optimal local solutions to the domain's sub- problem are first determined, and then a combination is selected of the local solutions, one from each domain, that explains the maximum number of cross-domain symptoms, where the optimal solution is supplemented, if necessary, with additional faults to explain any remaining unexplained cross-domain symptoms, determining also a bound on the deviation from optimality of the global solution.

公开(公告)号：EP2614672A1

公开(公告)日：2013-07-17

申请号：EP11824108.2

申请日：2011-09-08

申请人： Telcordia Technologies, Inc.

发明人： KRISHNAN, Komandur, R. ,  LUSS, Hanan

IPC分类号： H04W36/00

CPC分类号： H04W52/12 ,  H04W24/02 ,  H04W52/143 ,  H04W52/241 ,  H04W52/244 ,  H04W52/367 ,  H04W72/0473 ,  H04W72/082 ,  H04W84/045 ,  H04W92/20

摘要： A distributed method and system are presented for determining the largest Signal-to-Interference-and-Noise Ratio (SINR) that can be achieved by a plurality of small wireless cells, such as femtocells or picocells, while satisfying a specified SINR value for multiple large cells, referred to as macrocells. The method also determines the minimum power levels at each of the femtocells that achieve the maximum SINR for the femtocells. The distributed synchronous algorithm executes all intensive computations independently, locally at each of the femtocells. The computations are synchronized in time and executed simultaneously at all cells where after each of the iterations information of interim power selections at the multiple cells is exchanged among the femtocells. Eventually, the computations converge to the maximum SINR value and the corresponding minimum-power solution.