Sharing transmission mediums in WiFi-Bluetooth combination systems

1. A wireless communication device, comprising:

a first transceiver configured to communicate data using a first communication protocol, wherein:

the wireless communication device shares a wireless transmission medium with a second wireless communication device; and

the wireless communication device and the second wireless communication device are coupled via a 3-wire interface; and

a processing device coupled to the first transceiver, the processing device configured to:

transmit a request to use the wireless transmission medium to the second wireless communication device via the 3-wire interface;

transmit timing data to the second wireless communication device via the 3-wire interface, wherein the timing data indicates an amount of data the wireless communication device will communicate via the wireless transmission medium; and

in response to receiving an authorization to use the wireless transmission medium, communicate the data using the first communication protocol via the wireless transmission medium.

2. The wireless communication device of claim 1 , wherein the timing data indicates a length of time the wireless communication device will use the wireless transmission medium.

3. The wireless communication device of claim 1 , wherein the timing data comprises one or more pre-defined pulses transmitted via the 3-wire interface.

4. The wireless communication device of claim 1 , wherein the request to use the wireless transmission medium is transmitted via a request line of the 3-wire interface.

5. The wireless communication device of claim 1 , wherein the timing data is transmitted via a priority line of the 3-wire interface.

6. The wireless communication device of claim 1 , wherein the authorization to use the wireless transmission medium is received via a grant line of the 3-wire interface.

7. The wireless communication device of claim 1 , wherein the processing device is further configured to:

indicate, via a request line of the 3-wire interface, that the wireless communication device is using the wireless transmission medium while the wireless communication device communicates the data.

8. The wireless communication device of claim 7 , wherein the processing device is further configured to:

indicate, via the request line of the 3-wire interface, when the wireless communication device finishes communicating the data.

9. The wireless communication device of claim 8 , wherein the second wireless communication device refrains from using the wireless transmission medium while the first transceiver transmits the data.

10. The wireless communication device of claim 1 , wherein:

the first communication protocol comprises one or more of Bluetooth, Zigbee, and Long Term Evolution (LTE);

the second wireless communication device uses a second communication protocol; and

the second communication protocol comprises Wi-Fi.

11. A method, comprising:

receiving, by a first wireless communication device from a second wireless communication device via a 3-wire interface, a request to use a wireless transmission medium, wherein the first wireless communication device shares the wireless transmission medium with the second wireless communication device;

receiving, from the second wireless communication device, timing data via the 3-wire interface, wherein the timing data indicates an amount of data the second wireless communication device will communicate via the wireless transmission medium;

responsive to receiving the timing data, determining a time period to allow the second wireless communication device to use the wireless transmission medium based on the timing data; and

in response to determining the time period, transmitting, to the second wireless communication device, an authorization to use the wireless transmission medium.

12. The method of claim 11 , further comprising:

determining the time period based on the amount of data the second wireless communication device will communicate via the wireless transmission medium.

13. The method of claim 11 , further comprising:

in response to determining the time period, transmitting a message to a third wireless communication device, wherein the message indicates to the third wireless communication device to stop transmitting data to the first wireless communication device.

14. The method of claim 11 , wherein the request to use the wireless transmission medium is received via a request line of the 3-wire interface.

15. The method of claim 11 , wherein the timing data is received via a priority line of the 3-wire interface.

16. The method of claim 11 , wherein the authorization to use the wireless transmission medium is transmitted via a grant line of the 3-wire interface.

17. The method of claim 11 , further comprising:

receiving, via a request line of the 3-wire interface, a first indication that the second wireless communication device is using the wireless transmission medium while the second wireless communication device communicates data.

18. The method of claim 17 , further comprising:

receiving, via the request line of the 3-wire interface, a second indication when the second wireless communication device finishes communicating the data.

19. The method of claim 11 , further comprising:

refraining from using the wireless transmission medium while the second wireless communication device communicates data.

20. A system comprising:

a first wireless communication device; and

a second wireless communication device coupled to the first wireless communication device via a 3-wire interface, wherein:

the first wireless communication device shares a wireless transmission medium with the second wireless communication device;

the first wireless communication device is configured to:

transmit a request to use the wireless transmission medium, to the second wireless communication device via the 3-wire interface;

transmit timing data to the second wireless communication device via the 3-wire interface; and

in response to receiving an authorization to use the wireless transmission medium, transmit data using via the wireless transmission medium; and

the second wireless communication device is configured to:

receive, from the second wireless communication device, the request to use the wireless transmission medium;

receive, from the second wireless communication device, the timing data;

determine a time period to allow the second wireless communication device to use the wireless transmission medium based on the timing data; and

in response to determining the time period, transmit, to the second wireless communication device, the authorization to use the wireless transmission medium.