Inter-Cell Interference Mitigation
AssigneeParallel Wireless, Inc.
InventorsPrashanth Rao, Yang Cao, Kaitki Agarwal
Life of this patent
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Abstract
To address the problem of inter-cell interference in a heterogeneous network, several methods and systems are disclosed for determining interference caused by an aggressor mobile node, and transmitting at appropriate times and with transmit power that does not cause interference. Methods disclosed include using X2 communications, such as HII and RNTP messages, switching to an alternative radio access technology, sniffing at the eNodeB to obtain information, coordinating with a cloud coordination server, and using CFI information to avoid interfering with communications on the PDCCH.
Claims15
A method for reducing uplink interference at a first base station, comprising:
- assessing frequency resources shared between the first and a second base station to determine frequency resources that cause reduced interference at the first base station in comparison to other shared uplink frequency resources.
- determining whether mobile devices connected to the first base station may be switched to a Wi-Fi connection;
- and
- switching services provided to the mobile devices to a Wi-Fi connection between the mobile devices and the first base station.
A method for reducing interference at a first base station, comprising:
- at the first base station, sniffing shared frequency resources on the uplink of a second base station;
- and
- based on the sniffed frequency resources, identifying low interference resources for uplink scheduling use by the first base station.
A method for reducing uplink interference at a second base station, comprising:
- receiving, at a first base station, measurement information from one or more of a mobile device attached to the first base station;
- and
- based on the received measurement information and on a coverage radius of the first base station, sending a power configuration message to the mobile device to limit the transmit power of signals from the mobile device to the first base station.
Dependencies are inferred from the claim text.