Wireless power transfer method, apparatus and system

1. A communication method of a wireless power transmitter performing communication with at least one wireless power receiver through a plurality of slots, the method comprising:

allocating any one of the plurality of slots to any one of the at least one wireless power receiver;

providing at least one of the plurality of slots to the any one wireless power receiver as locked slots subsequent to the allocation; and

receiving information associated with a configuration phase and information associated with a negotiation phase from the any one wireless power receiver within the locked slots.

2. The method of claim 1 , further comprising:

suspending the provision of the locked slots when the reception of information associated with the configuration phase and information associated with the negotiation phase is completed.

3. The method of claim 2 , wherein the at least one slot is provided as locked slots prior to suspending the provision of the locked slots, and

the at least one slot is provided as free slots subsequent to suspending the provision of the locked slots.

4. The method of claim 1 , wherein the remaining slots excluding any one slot allocated to the any one wireless power receiver among the plurality of slots are free slots, and

the locked slots are at least one of the free slots.

5. The method of claim 4 , wherein the free slots are slots for allowing reception of information from any one of the at least one wireless power receiver.

6. The method of claim 1 , wherein information associated with the configuration phase comprises:

identification data packets, one or more proprietary data packets and an identification packet (CFG).

7. The method of claim 1 , wherein information associated with the negotiation phase comprises:

one or more negotiation data packets, optionally intermixed with proprietary data packets, and a specific request and end-negotiation packet.

8. The method of claim 1 , wherein subsequent to suspending the provision of the locked slots provided to the any one wireless power receiver, at least one of the plurality of slots is provided to one wireless power receiver different from the any one wireless power receiver as locked slots.

9. The method of claim 8 , wherein locked slots provided to the different one wireless power receiver are the any one slot allocated to the any one wireless power receiver among the plurality of slots, and at least one slot excluding one slot different from the any one slot allocated to the different one wireless power receiver.

10. The method of claim 8 , wherein information associated with a configuration phase and information associated with a negotiation phase are received from the different one wireless power receiver within locked slots provided to the different one wireless power receiver.

11. The method of claim 1 , wherein only information transmitted from the any one wireless power receiver to which the any one slot is allocated is received at the locked slots.

12. The method of claim 1 , wherein the locked slots limits the reception of information associated with the configuration phase and information associated with the negotiation phase from the remaining wireless power receivers other than the any one wireless power receiver among the at least one wireless power receiver.

13. A wireless power transmitter for performing communication with at least one wireless power receiver using a plurality of slots, the wireless power transmitter comprising:

a power conversion unit formed to transmit and receive a wireless power signal to and from the at least one wireless power receiver; and

a controller configured to allocate any one of the plurality of slots to any one of the at least one wireless power receiver, and provide at least one of the plurality of slots to the any one wireless power receiver as locked slots subsequent to the allocation,

wherein the locked slots are locked to receive information associated with a configuration phase and information associated with a negotiation phase from the any one wireless power receiver.

14. The wireless power transmitter of claim 13 , wherein the locked slots limits the reception of information associated with the configuration phase and information associated with the negotiation phase from the remaining wireless power receivers other than the any one wireless power receiver among the at least one wireless power receiver.

15. The wireless power transmitter of claim 13 , wherein the controller suspends the provision of the locked slots when the reception of information associated with the configuration phase and information associated with the negotiation phase is completed.

16. The wireless power transmitter of claim 13 , wherein the at least one slot is provided as locked slots prior to suspending the provision of the locked slots, and the at least one slot is provided as free slots subsequent to suspending the provision of the locked slots.

17. The wireless power transmitter of claim 13 , wherein the remaining slots excluding any one slot allocated to the any one wireless power receiver among the plurality of slots are free slots, and

the locked slots are provided as at least one of the free slots.

18. The wireless power transmitter of claim 13 , wherein information associated with the configuration phase comprises:

identification data packets, one or more proprietary data packets and an identification packet (CFG).

19. The wireless power transmitter of claim 13 , wherein information associated with the negotiation phase comprises:

one or more negotiation data packets, optionally intermixed with proprietary data packets, and a specific request and end-negotiation packet.

20. The wireless power transmitter of claim 13 , wherein subsequent to suspending the provision of the locked slots provided to the any one wireless power receiver, the controller provides at least one of the plurality of slots to one wireless power receiver different from the any one wireless power receiver as locked slots.