US Patent No. 9,237,547

MANAGEMENT OF CDMA REFERENCE CELL IDENTIFIERS IN AN LTE NETWORK


Patent No. 9,237,547
Issue Date January 12, 2016
Title Management Of Cdma Reference Cell Identifiers In An Lte Network
Inventorship Nicolas A. Nehme Antoun, Olathe, KS (US)
Ryan Sanford Talley, Overland Park, KS (US)
Shilpa Kowdley Srinivas, Brambleton, VA (US)
Khalid M. Medhat, Overland Park, KS (US)
Assignee Sprint Communications Company L.P., Overland Park, KS (US)

Claim of US Patent No. 9,237,547

1. One or more non-transitory computer-readable media having computer-executable instructions embodied thereon that, when
executed by a network node in a long-term-evolution (LTE) network (the “network”), cause the network node to perform a method
of using Session Initiation Protocol (SIP) to manage code division multiple access (CDMA) reference cell identifiers (IDs)
in the network, the method comprising:
at the network node in the network:
communicating a SIP request to each eNodeB and each CDMA base station in the network to subscribe to radio-frequency (RF)
coverage information and location information associated with the each eNodeB and the each CDMA base station;

receiving a SIP response from the each eNodeB in the network comprising the RF coverage information and the location information;
receiving a SIP response from the each CDMA base station in the network comprising the RF coverage information, the location
information, and a CDMA reference cell ID associated with the each CDMA base station;

for the each eNodeB, determining a first set of CDMA base stations that is in proximity to the each eNodeB using the RF coverage
information and the location information received from the each eNodeB and the each CDMA base station;

receiving from the each eNodeB a SIP request to subscribe to CDMA reference cell IDs of the first set of CDMA base stations
that is determined by the network node to be in proximity to the each of the eNodeBs; and

communicating a SIP response to the each eNodeB comprising the CDMA reference cell IDs of the first set of CDMA base stations
that is determined by the network node to be in proximity to the each eNodeBs, wherein the CDMA reference cell IDs are utilized
by the each eNodeB to determine a CDMA base station within the first set of CDMA base stations to utilize when a network customer's
user equipment (UE) associated with the each eNodeB requires voice or SMS services.