Method and apparatus for utilizing 5G spectrum and frame structure in wireless communication system

1. A method performed by a first base station (BS) serving a first cell in a wireless communication system, the method comprising:

transmitting first information on an intended subframe type of the first cell to a second BS serving a second cell;

receiving second information on an intended subframe type of the second cell from the second BS;

configuring a first set of subframes and a second set of subframes in a radio frame of the first cell based on the second information,

wherein a subframe type of the first set of subframes is fixed among the first cell and the second cell, and a subframe type of the second set of subframes is dynamically adapted; and

communicating with a user equipment (UE) in at least one of the first set of subframes or the second set of subframes,

wherein the first BS and the second BS belong to different operators, and

wherein the different operators are synchronized with each other.

2. The method of claim 1 , wherein the first cell and the second cell operate at a frequency below 6 GHz.

3. The method of claim 1 , wherein the first cell and the second cell operate at a frequency above 6 GHz.

4. The method of claim 1 , wherein the first set of subframes is indicated via system information or via a physical broadcast channel (PBCH).

5. The method of claim 1 , wherein the radio frame includes 10 subframes, and

wherein the first set of subframes includes subframe #0, subframe #4, subframe #5, and subframe #9.

6. The method of claim 1 , wherein a beam direction of each of the plurality of cells is divided into multiple sectors in one transmission time interval (TTI).

7. The method of claim 6 , wherein each of the first cell and the second cell uses different patterns of the beam direction to be orthogonal with each other.

8. A first base station (BS) serving a first cell in a wireless communication system, the first BS comprising:

a memory;

a transceiver; and

a processor, coupled to the memory and the transceiver, that:

controls the transceiver to transmit first information on an intended subframe type of the first cell to a second BS serving a second cell,

controls the transceiver to receive second information on an intended subframe type of the second cell from the second BS,

configures a first set of subframes and a second set of subframes in a radio frame of the first cell based on the second information,

wherein a subframe type of the first set of subframes is fixed among the first cell and the second cell, and a subframe type of the second set of subframes is dynamically adapted, and

controls the transceiver to communicate with a user equipment (UE) in at least one of the first set of subframes or the second set of subframes,

wherein the first BS and the second BS belong to different operators, and

wherein the different operators are synchronized with each other.

9. The first BS of claim 8 , wherein the first cell and the second cell operate at a frequency below 6 GHz.

10. The first BS of claim 8 , wherein the first cell and the second cell operate at a frequency above 6 GHz.

11. The first BS of claim 8 , wherein the first set of subframes is indicated via system information or via a physical broadcast channel (PBCH).

12. The first BS of claim 8 , wherein the radio frame includes 10 subframes, and

wherein the first set of subframes includes subframe #0, subframe #4, subframe #5, and subframe #9.

13. The first BS of claim 8 , wherein a beam direction of each of the first cell and the second cell is divided into multiple sectors in one transmission time interval (TTI).

14. The first BS of claim 13 , wherein each of the first cell and the second cell uses different patterns of the beam direction to be orthogonal with each other.