Method and device for multiple-serving-cell connectivity for UE and base station
View Patent ↗A method and a device for multiple-serving-cell connectivity in a UE and in a base station are disclosed in the present invention. Addressing the problem of the PUCCH power reduction that can be caused by PUCCH transmission on a secondary cell during dual-connectivity communication, the present invention provides a solution for PUCCH power reduction during dual-connectivity communication. In one embodiment, when power is reduced, the priority of PUCCH transmission on a secondary cell is lower than the priority of PUCCH transmission on a primary cell. The present invention can ensure PUCCH reception quality on a primary cell, guaranteeing the robustness of UE connectivity. Moreover, the present invention maintains the highest degree of compatibility with present systems.
1. A method for multiple-serving-cell connectivity in a UE, comprising:
Step A: receiving a downlink signaling of a first serving cell to obtain a first power control parameter;
Step B: transmitting a first PUCCH signal to the first serving cell with a first power in a first sub frame; and
Step C: transmitting a second PUCCH signal to a second serving cell with a second power in the first sub frame;
wherein the second power is a smaller value between a difference value and a second ideal power, the difference value is obtained by subtracting the first power from a maximum total transmitting power; the first power is a transmitting power of the first PUCCH signal without performing a power reduction, and the second ideal power is a transmitting power of the second PUCCH signal without performing a power reduction; the power is a linear value; the first power control parameter comprises a configuration parameter of the first power.
2. The method for multiple-serving-cell connectivity in the UE according to claim 1 , wherein the method further comprises:
Step D: transmitting a third uplink signal to a third serving cell with a third power in the first sub frame;
wherein the third uplink signal is a PUSCH signal with a UCI, the third power is a smaller value between a difference value and a third ideal power, and the difference value is obtained by subtracting the first power and the second power from the maximum total transmitting power; the third ideal power is a transmitting power of the third uplink signal without performing the power reduction.
3. The method for multiple-serving-cell connectivity in the UE according to claim 1 , wherein the method further comprises:
Step E: transmitting PUSCH signals S 1 , S 2 , . . . , S K without UCI in the first sub frame to K serving cells C 1 , C 2 , . . . , C K respectively, and with powers P 1 , P 2 , . . . , P K respectively;
wherein the K serving cells do not comprise the third serving cells; a sum of the powers P 1 , P 2 , . . . , P K does not exceed a difference value obtained by subtracting the first power, the second power and the third power from the maximum total transmitting power;
if the step D does not exist, the third power is 0, the k is a positive integer from 1 to K, and the K is a positive integer; the power is a linear value.
4. The method for multiple-serving-cell connectivity in the UE according to claim 3 , wherein the maximum total transmitting power is a linear value corresponding to 23 dBm.
5. The method for multiple-serving-cell connectivity in the UE according to claim 3 , wherein the power P k is the product of power reduction factors w and P k ideal of the first sub frame; the P k ideal is a transmitting power of the S k ; w is configurable.
6. The method for multiple-serving-cell connectivity in the UE according to claim 1 , wherein the method before the step C comprises:
Step C 0 : receiving a downlink signaling of a second serving cell to obtain a second power control parameter;
wherein the second power control parameter comprises a configuration parameter of the second ideal power.
7. The method for multiple-serving-cell connectivity in the UE according to claim 1 , wherein the first serving cell is a primary serving cell of the UE.
8. The method for multiple-serving-cell connectivity in the UE according to claim 1 , wherein the first power control parameter comprises:
a configuration parameter of the second ideal power;
a configuration parameter of the third ideal power; and
a configuration parameter of the P k ideal .
9. An user equipment, comprising:
a first module, for receiving a downlink signaling of a first serving cell to obtain a first power control parameter;
a second module, for transmitting a first PUCCH signal to the first serving cell with a first power in a first sub frame; and
a third module, for transmitting a second PUCCH signal to a second serving cell with a second power in the first sub frame;
wherein the second power is a smaller value between a difference value and a second ideal power, and the difference value is obtained by subtracting the first power from a maximum total transmitting power; the first power is a transmitting power of the first PUCCH signal without performing a power reduction, and the second ideal power is a transmitting power of the second PUCCH signal without performing a power reduction; the power is a linear value; the first power control parameter comprises a configuration parameter of the first power.
10. The user equipment according to claim 9 , wherein the first serving cell is a primary serving cell of the UE.
11. The user equipment according to claim 9 , further comprising:
a fourth module, for transmitting a third uplink signal to a third serving cell with a third power in the first sub frame;
wherein the third uplink signal is a PUSCH signal with a UCI, the third power is a smaller value between a difference value and a third ideal power, and the difference value is obtained by subtracting the first power and the second power from the maximum total transmitting power; the third ideal power is a transmitting power of the third uplink signal without performing the power reduction.
12. The user equipment according to claim 9 , further comprising:
a fifth module, transmitting PUSCH signals S 1 , S 2 , . . . , S K without UCI in the first sub frame to K serving cells C 1 , C 2 , . . . , C K respectively, and with powers P 1 , P 2 , . . . , P K respectively;
wherein the K serving cells do not comprise the third serving cells; a sum of the powers P 1 , P 2 , . . . , P K does not exceed a difference value obtained by subtracting the first power, the second power and the third power from the maximum total transmitting power; if the step D does not exist, the third power is 0, the k is a positive integer from 1 to K, and the K is a positive integer; the power is a linear value.
13. The user equipment according to claim 12 , wherein the maximum total transmitting power is a linear value corresponding to 23 dBm.
14. The user equipment according to claim 12 , wherein the power P k is the product of power reduction factors w and P k ideal of the first sub frame; the P k ideal is a transmitting power of the S k ; w is configurable.
15. The user equipment according to claim 9 , wherein the first module is further used for receiving a downlink signaling of a second serving cell to obtain a second power control parameter;
wherein the second power control parameter comprises a configuration parameter of the second ideal power.
16. The user equipment according to claim 9 , wherein the first power control parameter comprises:
a configuration parameter of the second ideal power;
a configuration parameter of the third ideal power; and
a configuration parameter of the P k ideal .