Mobile guided uplink interference management
View Patent ↗Systems and methods can be implemented on a user device and eNBs to manage uplink interference. A user device associated with a serving base station may detect downlink interference from one or more interfering base stations that are different from the serving base station. The user device that detects downlink interference can determine an uplink radio resource set from a plurality of predefined uplink radio resource sets based, at least in part, on the detected downlink interference. The user device can then transmit to the serving base station a radio resource indication identifying the determined uplink radio resource set to facilitate uplink interference management.
1. A method for managing interference, comprising:
detecting, by a user device, downlink interference from one or more interfering base stations, the user device operating in a cell of a serving base station different from the one or more interfering base stations;
receiving, from one or more visible base stations, one or more uplink radio interference indications identifying one or more frequency locations where at least one of uplink interference currently exceeds a first specified threshold or uplink interference is targeted not to exceed a second specified threshold;
determining, by the user device, the one or more identified frequency locations include transmissions from the user device based, at least in part, on the one or more uplink radio interference indications;
determining, by the user device, an uplink radio resource set from a plurality of predefined uplink radio resource sets and a downlink radio resource set from a plurality of predefined downlink radio resource sets based, at least in part, on at least one of determining the user device causes uplink interference in at least one of the one or more identified frequency locations or the detected downlink interference; and
transmitting, to the serving base station, a radio resource indication requesting allocation of the determined uplink radio resource set.
2. The method of claim 1 , wherein transmitting a radio resource indication comprises transmitting the radio resource indication in at least one of an uplink control channel or an uplink data channel.
3. The method of claim 1 , wherein determining the one or more identified frequency locations include transmissions from the user device comprises:
comparing an uplink data transmission history of the user device to the one or more frequency locations identified by the one or more uplink radio interference indications; and
determining the user device causes uplink interference in the one or more identified frequency locations based, at least in part, on a match between the uplink data transmission history and the one or more frequency locations.
4. The method of claim 3 , further comprising determining a transmit power associated with the matching uplink data transmission history exceeds a predefined threshold, wherein determining the user device causes uplink interference in the one or more identified frequency locations is also based on the transmit power associated with the matching uplink data transmission history exceeding the predefined threshold.
5. The method of claim 1 , wherein the one or more uplink radio interference indications includes at least one of an uplink Interference Overload Indicator (IOI) or an uplink High Interference Indicator (HII).
6. The method of claim 1 , wherein the one or more uplink radio interference indications are encoded in a downlink control channel from a neighbouring base station, the method further comprising decoding only the downlink control channel independent of decoding any portion of a downlink data channel from the neighbouring base station.
7. The method of claim 1 , wherein the one or more uplink radio interference indications are encoded in a pre-specified portion of a downlink data channel from a neighbouring base station, the method further comprising decoding only the pre-specified portion of the downlink data channel independent of decoding a downlink control channel from the neighbouring base station.
8. User Equipment (UE) for managing interference, comprising:
memory configured to store a plurality of predefined uplink radio resource sets; and
one or more processors configured to:
detect, by a user device, downlink interference from one or more interfering base stations, the user device operating in a cell of a serving base station different from the one or more interfering base stations;
receive, from one or more visible base stations, one or more uplink radio interference indications identifying one or more frequency locations where at least one of uplink interference currently exceeds a first specified threshold or uplink interference is targeted not to exceed a second specified threshold;
determine, by the user device, the one or more identified frequency locations include transmissions from the user device based, at least in part, on the one or more uplink radio interference indications;
determine, by the user device, an uplink radio resource set from a plurality of predefined uplink radio resource sets and a downlink radio resource set from a plurality of predefined downlink radio resource sets based, at least in part, on at least one of determining the user device causes uplink interference in at least one of the one or more identified frequency locations or the detected downlink interference; and
transmit, to the serving base station, a radio resource indication requesting allocation the determined uplink radio resource set.
9. The UE of claim 8 , wherein the processors configured to transmit a radio resource indication comprise the processors configured to transmit the radio resource indication in at least one of an uplink control channel or an uplink data channel.
10. The UE of claim 8 , wherein the processors configured to determine the one or more identified frequency locations include transmissions from the user device comprise the processors configured to:
compare an uplink data transmission history of the user device to the one or more frequency locations identified by the one or more uplink radio interference indications; and
determine the user device causes uplink interference in the one or more identified frequency locations based, at least in part, on a match between the uplink data transmission history and the one or more frequency locations.
11. The UE of claim 10 , the processors further configured to determine a transmit power associated with the matching uplink data transmission history exceeds a predefined threshold, wherein determining the user device causes uplink interference in the one or more identified frequency locations is also based on the transmit power associated with the matching uplink data transmission history exceeding the predefined threshold.
12. The UE of claim 8 , wherein the one or more uplink radio interference indications includes at least one of an uplink Interference Overload Indicator (IOI) or an uplink High Interference Indicator (HII).
13. The UE of claim 8 , wherein the one or more uplink radio interference indications are encoded in a downlink control channel from a neighbouring base station, the UE further comprising decoding only the downlink control channel independent of decoding any portion of a downlink data channel from the neighbouring base station.
14. The UE of claim 8 , wherein the one or more uplink radio interference indications are encoded in a pre-specified portion of a downlink data channel from a neighbouring base station, the processors further configured to decode only the pre-specified portion of the downlink data channel independent of decoding a downlink control channel from the neighbouring base station.