Patent ID: 9591534
Date: 2017-03-07
CPC Classifications: H04W

Claim:
1. A method for assisting in the updating of neighbor cell information in a radio communications system, the method being performed by a first network control node controlling at least one cell of a first radio access network (RAN) and comprising: transmitting, from the first radio access network control node to a second radio access network control node, a signal comprising a first cell identity of a newly introduced cell, when a cell has been newly introduced to the first radio access network, wherein the second radio access network control node transmits a signal comprising the first cell identity and a request to a first UE associated with a second radio access network to search for the newly introduced cell, and wherein the first cell identity is used by the first UE associated with the second radio access network to identify the newly introduced cell, which is conveyed from the first UE to the second radio access network control node within a report indicating that the first UE has found the newly introduced cell responsive to a search; and receiving, at the first radio access network control node from the second network control node, a signal comprising a second cell identity of a second cell associated with a second UE, associated with the second radio access network, said signal from the second network control node including a request to set up neighboring cell information between the newly introduced cell and the second cell; setting up, at the first radio access network control node, the neighboring cell information between the newly introduced cell and the second cell, which updates neighboring cell information at the first radio access network control node to indicate that the newly introduced cell of the first radio access network and the second cell of the second radio access network are neighboring cells, wherein the setting up occurs at the first radio network node using reported local cell identity information despite a fact that the first and second UE do not report cell global identity (CGI) for the newly introduced cell.