Resource block indication and allocation for in-device coexistence interference avoidance
View Patent ↗A method is provided for reducing radio frequency interference between a first device and a second device co-located on a UE. The method comprises transmitting, by the UE, to a network element, responsive to the UE detecting IDC interference between the first device and the second device, an output power level of the first device, an amount of de-sense experienced by the second device, and information regarding a plurality of RBs on which the UE requests to perform an uplink transmission.
1. A method for reducing radio frequency interference between a first device and a second device co-located on a user equipment (UE), the method comprising:
transmitting, by the UE, to a network element, responsive to the UE detecting in-device coexistence (IDC) interference between the first device and the second device, an output power level of the first device, an amount of de-sense experienced by the second device, and information regarding a plurality of resource blocks (RBs) on which the UE requests to perform an uplink transmission,
wherein the information regarding the plurality of RBs comprises one of:
a start index and a stop index for the plurality of RBs;
a start index and a number of RBs for the plurality of RBs; or
a stop index and a number of RBs for the plurality of RBs; and wherein, when a decrease occurs in the number of RBs on which the UE transmits in the uplink responsive to the UE's transmission of the output power level of the first device, the amount of de-sense experienced by the second device, and the information regarding the plurality of RBs, an increase occurs in the UE's uplink transmission rate, the increase being achieved by an increase in the number of scheduling requests made by the UE.
2. The method of claim 1 , wherein the first device is a long term evolution (LTE)-based device and the second device is one of:
a device using an industrial, scientific, and medical (ISM) radio frequency band; or
a device using a global navigation satellite system (GNSS) radio frequency band.
3. The method of claim 2 , wherein the information regarding the plurality of RBs comprises specific RBs determined by the UE in order to reduce the amount of de-sense experienced by the second device while the LTE-based device performs the uplink transmission at the output power level.
4. The method of claim 1 , wherein the UE retrieves from internal storage for inclusion in the transmission to the network element data relating a number of RBs for uplink transmission to the output power level of the first device and to the amount of de-sense experienced by the second device.
5. The method of claim 1 , wherein the UE transmits the output power level of the first device, the amount of de-sense experienced by the second device, and the information regarding the plurality of RBs in at least one of:
a new radio resource control (RRC) message;
an existing RRC message with a new information element;
a new medium access control (MAC) control element (CE);
a reserved field in an existing field in a MAC CE; or
an IDC indication message.
6. The method of claim 1 , wherein the UE includes in the transmission to the network element only RB densities that cause in the second device a de-sense level below a threshold level, information regarding the threshold level having been received by the UE from the network element.
7. The method of claim 1 , wherein the UE further includes in the transmission to the network element at least one of:
unusable carriers;
one or more desired subframe reservation bitmap patterns that follow a hybrid automatic repeat request (HARQ) timing process; or
a desired cycle periodicity or length for a discontinuous reception (DRX) configuration.
8. A user equipment (UE) comprising:
a processor configured such that the UE transmits, to a network element, responsive to the UE detecting in-device coexistence (IDC) interference between a first device and a second device co-located on the UE, an output power level of the first device, an amount of de-sense experienced by the second device, and information regarding a plurality of resource blocks (RBs) on which the UE requests to perform an uplink transmission,
wherein the information regarding the plurality of RBs comprises one of:
a start index and a stop index for the plurality of RBs;
a start index and a number of RBs for the plurality of RBs; or
a stop index and a number of RBs for the plurality of RBs; and wherein, when a decrease occurs in the number of RBs on which the UE transmits in the uplink responsive to the UE's transmission of the output power level of the first device, the amount of de-sense experienced by the second device, and the information regarding the plurality of RBs, an increase occurs in the UE's uplink transmission rate, the increase being achieved by an increase in the number of scheduling requests made by the UE.
9. The UE of claim 8 , wherein the first device is a long term evolution (LTE)-based device and the second device is one of:
a device using an industrial, scientific, and medical (ISM) radio frequency band; or
a device using a global navigation satellite system (GNSS) radio frequency band.
10. The UE of claim 9 , wherein the information regarding the plurality of RBs comprises specific RBs determined by the UE in order to reduce the amount of de-sense experienced by the second device while the LTE-based device performs the uplink transmission at the output power level.
11. The UE of claim 8 , wherein the UE retrieves from internal storage for inclusion in the transmission to the network element data relating a number of RBs for uplink transmission to the output power level of the first device and to the amount of de-sense experienced by the second device.
12. The UE of claim 8 , wherein the UE transmits the output power level of the first device, the amount of de-sense experienced by the second device, and the information regarding the plurality of RBs in at least one of:
a new radio resource control (RRC) message;
an existing RRC message with a new information element;
a new medium access control (MAC) control element (CE);
a reserved field in an existing field in a MAC CE; or
an IDC indication message.
13. The UE of claim 8 , wherein the UE includes in the transmission to the network element only RB densities that cause in the second device a de-sense level below a threshold level, information regarding the threshold level having been received by the UE from the network element.
14. A network element comprising:
a processor configured such that, responsive to receiving from a user equipment (UE) an output power level of a first device on the UE, an amount of de-sense experienced by a second device on the UE, and information regarding a plurality of resource blocks (RBs) requested by the UE for uplink transmission, the network element grants at least a portion of the requested RBs to the UE; wherein the information regarding the plurality of RBs comprises one of: a start index and a stop index for the plurality of RBs; a start index and a number of RBs for the plurality of RBs; or a stop index and a number of RBs for the plurality of RBs; and wherein, when the network element decreases the number of RBs granted to the UE responsive to receiving the output power level of the first device, the amount of de-sense experienced by the second device, and the information regarding plurality of RBs requested by the UE, the network element increases the number of uplink grants to the UE in order to increase the UE's uplink transmission rate.
15. The network element of claim 14 , wherein the network element determines size of the grant of RBs based on the network element's scheduling and load balancing status, and wherein the network element provides the grant of RBs to the UE in at least one of:
a new radio resource control (RRC) message;
an existing RRC message with a new information element;
a new medium access control (MAC) control element (CE);
a reserved field in an existing field in a MAC CE; or
an IDC indication response message.
16. The network element of claim 14 , wherein the network element transmits to the UE a threshold level indicating that the UE is to transmit to the network element only RB densities that cause in the second device a de-sense level below the threshold level.
17. The network element of claim 14 , wherein the network element transmits the output power level of the first device, the amount of de-sense experienced by the second device, and the information regarding a plurality of RBs requested by the UE to another network element responsive to a handover request from the UE.