Patent ID: 9467864
Filing Date: 2016-10-11
CPC Classification: H04W

Claim Text:
1. A method of spectrum utilization in a wireless cellular environment with coverage of at least two wireless networks, comprising: determining a reference signal received power (RSRP) threshold, the RSRP threshold being a division point for changing a small-cell base station's spectrum using mode, and the spectrum using mode comprises a shared spectrum mode and a separate spectrum mode, wherein the small-cell base station and a large-cell base station share a same spectrum when in the shared spectrum mode, and wherein available spectrum resources are divided into two parts and the small-cell base station and the large-cell base station use their respective part of spectrum resources allocated in advance when in the separate spectrum mode; detecting, by the small-cell base station, RSRPs of at least one large-cell base station; and comparing a highest one of the detected RSRPs with the determined RSRP threshold, adopting the separate spectrum mode if the highest one of the detected RSRP exceeds the determined RSRP threshold, and otherwise, adopting the shared spectrum mode; if the highest one of the detected RSRPs equals to the RSRP threshold, the small-cell base station has a same network capacity under the separate spectrum mode and the shared spectrum mode, wherein the RSRP threshold is an uplink RSRP threshold, and determining the RSRP threshold comprises: determining a threshold of a total acceptable uplink interference of a large-cell base station, detecting a current uplink interference to the large-cell base station, determining an acceptable small-cell interference threshold according to the threshold of the total acceptable uplink interference of the large-cell base station and the current uplink interference, and determining the uplink RSRP threshold according to the acceptable small-cell interference threshold.