US Patent No. 10,694,578

APPARATUS AND METHODS FOR HAND-IN TO A FEMTO NODE


Patent No. 10,694,578
Issue Date June 23, 2020
Title Apparatus And Methods For Hand-in To A Femto Node
Inventorship Andrei Radulescu, San Diego, CA (US)
Vinay Chande, San Diego, CA (US)
Jen Chen, La Jolla, CA (US)
Christophe Chevallier, San Diego, CA (US)
Farhad Meshkati, San Diego, CA (US)
Sanjiv Nanda, San Diego, CA (US)
Damanjit Singh, San Diego, CA (US)
Mehmet Yavuz, San Diego, CA (US)
Sumeeth Nagaraja, San Diego, CA (US)
Yan Zhou, San Diego, CA (US)
Assignee QUALCOMM Incorporated, San Diego, CA (US)

Claim of US Patent No. 10,694,578

1. A method for wireless communications, comprising:receiving a handover message for a device comprising one or more parameters including a primary scrambling code (PSC) related to a target femto node;
applying, to one or more femto nodes that utilize the PSC, one or more filters based in part on the one or more parameters to determine whether at least one femto node of the one or more femto nodes corresponds to the target femto node; and
preparing the at least one femto node to receive hand-in of the device,
wherein the applying the one or more filters further comprises applying an uplink (UL) received signal strength indicator (RSSI) filter to the one or more femto nodes that determines that a specific femto node is a possible target femto node in response to a rise in UL RSSI measured at the specific femto node indicating presence of the device, wherein applying the UL RSSI filter comprises:
storing a received UL RSSI reported by the specific femto node according to a time schedule for use with the UL RSSI filter;
comparing an average over time of the received UL RSSI for the specific femto node to a current UL RSSI for the specific femto node to determine the rise in UL RSSI measured at the specific femto node;
setting a threshold for each specific femto node based in part on a cell individual offset of each of the one or more femto nodes; and
determining that the rise in UL RSSI measured at the specific femto node indicates presence of the device at the specific femto node in response to determining that a difference between the current UL RSSI for the specific femto node and the average over time of the received UL RSSI for the specific femto node satisfies the threshold for the specific femto node.