Methods and devices for data transmission without grant during measurement gap
A method includes transmitting, by transmitting circuitry of a base station, data to a user equipment (UE) in one of a plurality of measurement objects in a bandwidth part (BWP) of a first carrier during one of a plurality of measurement gap periods of the UE, and transmitting, by the transmitting circuitry, a preemption indication to the UE in a second carrier after the one of the plurality of measurement gap periods. The preemption indication contains at least one of time resource allocation information or frequency resource allocation information of the data contained in the one of the plurality of measurement objects.
1. A method comprising:
transmitting, by transmitting circuitry of a base station, downlink data to a user equipment (UE) in at least one of a plurality of measurement objects in a first frequency carrier during one of a plurality of measurement gap periods of the UE; and
transmitting, by the transmitting circuitry, an indicator associated with the downlink data to the UE in a second frequency carrier and after the one of the plurality of measurement gap periods,
wherein the indicator indicates at least one of time resource allocation information and frequency resource allocation information of the downlink data contained in the one of the plurality of measurement objects.
2. The method of claim 1 , wherein the at least one of the plurality of measurement objects comprises every measurement object in the plurality of measurement objects.
3. The method of claim 1 , further comprising:
transmitting, by the transmitting circuitry, a measurement object configuration to the UE, the measurement object configuration containing a list of measurement object identifiers (IDs) identifying a measurement object for each of the plurality of measurement gap periods,
wherein transmitting the downlink data to the UE comprises transmitting the downlink data in the one of the plurality of measurement objects identified in the list during the one of the plurality of measurement gap periods.
4. The method of claim 1 , further comprising:
transmitting, by the transmitting circuitry, a measurement object configuration to the UE, the measurement object configuration containing an order by which the UE is to perform measurement using the plurality of measurement objects in the plurality of measurement gap periods,
wherein transmitting the downlink data to the UE comprises transmitting the downlink data in the one of the plurality of measurement objects in the one of the plurality of measurement gap periods based on the order.
5. The method of claim 4 , wherein the order is based on one of:
measurement object IDs identifying a corresponding measurement object for each of the plurality of measurement gap periods; and
an explicitly configured order for each of the plurality of measurement gap periods.
6. The method of claim 1 , wherein the indicator is included in downlink control information (DCI) in the second frequency carrier.
7. The method of claim 1 , wherein the indicator includes demodulation information for decoding the downlink data.
8. The method of claim 1 , further comprising:
applying a precoding matrix to the downlink data, wherein the precoding matrix is the same as that of a reference signal contained in a first slot transmitted to the UE in the second frequency carrier after the one of the plurality of measurement gap periods.
9. The method of claim 1 , further comprising:
transmitting, by the transmitting circuitry, a measurement object configuration containing a saved data indicator to the UE, wherein
when the saved data indicator indicates YES, the UE saves the downlink data in a soft buffer after the one of the plurality of measurement gap periods, and
when the saved data indicator indicates NO, the UE discards the downlink data after the one of the plurality of measurement gap periods.
10. The method of claim 1 , wherein the transmitting the downlink data to the UE in the first frequency carrier comprises transmitting the downlink data without grant to the UE and while the UE is taking measurement during one of the plurality of measurement gap periods on the second frequency carrier.
11. A method comprising:
receiving, by receiving circuitry of a user equipment (UE), downlink data in one of a plurality of measurement objects in a first frequency carrier during one of a plurality of measurement gap periods; and
receiving, by the receiving circuitry, an indicator associated with the downlink data in a second frequency carrier after the one of the plurality of measurement gap periods,
wherein the indicator indicates at least one of time resource allocation information and frequency resource allocation information of the downlink data contained in the one of the plurality of measurement objects.
12. The method of claim 11 , further comprising:
receiving, by the receiving circuitry, a measurement object configuration, the measurement object configuration containing a list of measurement object identifiers (IDs) identifying a measurement object for each of the plurality of measurement gap periods,
wherein receiving the downlink data comprises receiving the downlink data in the one of the plurality of measurement objects identified in the list during the one of the plurality of measurement gap periods.
13. The method of claim 11 , further comprising:
receiving, by the receiving circuitry, a measurement object configuration, the measurement object configuration containing an order by which the UE is to perform measurement using the plurality of measurement objects in the plurality of measurement gap periods,
wherein receiving the downlink data comprises receiving the downlink data in the one of the plurality of measurement objects in the one of the plurality of measurement gap periods based on the order.
14. The method of claim 13 , wherein the order is based on one of:
measurement object IDs identifying a corresponding measurement object for each of the plurality of measurement gap periods; and
an explicitly configured order for each of the plurality of measurement gap periods.
15. The method of claim 11 , wherein the indicator is included in downlink control information (DCI) in the second frequency carrier.
16. The method of claim 11 , wherein the indicator includes demodulation information for decoding the downlink data.
17. The method of claim 11 , further comprising:
applying a precoding matrix for decoding the downlink data, wherein the precoding matrix is the same as that of a reference signal contained in a first slot received by the UE in the second frequency carrier after the one of the plurality of measurement gap periods.
18. The method of claim 11 further comprising:
receiving, by the receiving circuitry, a measurement object configuration, the measurement object configuration containing a saved data indicator, wherein
when the saved data indicator indicates YES, the UE saves the downlink data in a soft buffer after the one of the plurality of measurement gap periods, and
when the saved data indicator indicates NO, the UE discards the downlink data after the one of the plurality of measurement gap periods.
19. The method of claim 11 , wherein the receiving the downlink data in the first frequency carrier comprises receiving the downlink data without grant and while the UE is taking measurement during one of the plurality of measurement gap periods on the second frequency carrier.
20. A user equipment (UE) comprising:
one or more non-transitory computer-readable media having computer-executable instructions embodied thereon;
at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the computer-executable instructions to:
receive, using receiving circuitry, downlink data in one of a plurality of measurement objects in a first frequency carrier during one of a plurality of measurement gap periods; and
receive, using the receiving circuitry, an indicator associated with the downlink data in a second frequency carrier of the UE after the one of the plurality of measurement gap periods,
wherein the indicator indicates at least one of time resource allocation information and frequency resource allocation information of the downlink data contained in the one of the plurality of measurement objects.
21. The UE of claim 20 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
receive, using the receiving circuitry, a measurement object configuration, the measurement object configuration containing a list of measurement object identifiers (IDs) identifying a measurement object for each of the plurality of measurement gap periods,
wherein the computer-executable instructions to receive the downlink data comprise computer-executable instructions to receive the downlink data in the one of the plurality of measurement objects identified in the list during the one of the plurality of measurement gap periods.
22. The UE of claim 20 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
receive a measurement object configuration, the measurement object configuration containing an order by which the UE is to perform measurement using the plurality of measurement objects in the plurality of measurement gap periods,
wherein the computer-executable instructions to receive the downlink data comprise computer-executable instructions to receive the downlink data in the one of the plurality of measurement objects in the one of the plurality of measurement gap periods based on the order.
23. The UE of claim 22 , wherein the order is based on one of:
measurement object IDs identifying a corresponding measurement object for each of the plurality of measurement gap periods; and
an explicitly configured order for each of the plurality of measurement gap periods.
24. The UE of claim 20 , wherein the indicator is included in downlink control information (DCI) in the second frequency carrier.
25. The UE of claim 20 , wherein the indicator includes demodulation information for decoding the downlink data.
26. The UE of claim 20 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
apply a precoding matrix for decoding the downlink data, wherein the precoding matrix is the same as that of a reference signal contained in a first slot received by the UE in the second frequency carrier after the one of the plurality of measurement gap periods.
27. The UE of claim 20 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
receive, by the receiving circuitry, a measurement object configuration, the measurement object configuration containing a saved data indicator, wherein
when the saved data indicator indicates YES, the UE saves the downlink data in a soft buffer after the one of the plurality of measurement gap periods, and
when the saved data indicator indicates NO, the UE discards the downlink data after the one of the plurality of measurement gap periods.
28. The UE of claim 20 , wherein the the computer-executable instructions to receive the downlink data in the first frequency carrier comprises computer-executable instructions to receive the downlink data without grant and while the UE is taking measurement during one of the plurality of measurement gap periods on the second frequency carrier.