Reader coordination for access control

1. A method for providing access control, the method comprising:

receiving a credential by a first reader associated with a first access facility using a first communication protocol from a device that stores the credential, wherein the first communication protocol is a low energy wireless communication protocol;

establishing a secret with the device using the first communication protocol;

providing the secret from the first reader to a second reader associated with a second access facility either directly from the first reader to the second reader or through a controller connected between the first reader and the second reader;

identifying intent information for the device by performing ranging of the device by the second reader using the secret and a second communication protocol different than the first communication protocol, wherein the second communication protocol is ultra-wide band (UWB); and

coordinating access through one of the first access facility or the second access facility based on the intent information.

2. The method of claim 1 , further comprising:

providing the secret from the first reader to a third reader associated with a third access facility;

wherein identifying intent information for the device further comprises performing ranging of the device by the third reader using the secret and the second communication protocol; and

wherein coordinating access comprises coordinating access through one of the first access facility, the second access facility, or the third access facility based on the intent information.

3. The method of claim 1 , further comprising:

determining, from the intent information, that a user of the device is moving away from the second reader; and

terminating ranging by the second reader in response to determining the user is moving away from the second reader.

4. The method of claim 1 , wherein providing the secret from the first reader to the second reader comprises providing the secret to the second reader through the controller.

5. The method of claim 1 , wherein providing the secret from the first reader to the second reader comprises providing the secret directly to the second reader from the first reader.

6. The method of claim 1 , wherein identifying intent information comprises identifying the intent information by performing ranging of the device using only the second reader.

7. The method of claim 1 , wherein identifying intent information comprises performing ranging of the device by the first reader using the secret and the second communication protocol.

8. The method of claim 1 , wherein the first communication protocol is Bluetooth Low Energy (BLE).

9. An access control system comprising:

a first access facility;

a second access facility;

a first reader configured to control access through the first access facility, receive a credential using a first communication protocol from a device that stores the credential, and establish a secret with the device using the first communication protocol, wherein the first communication protocol is a low energy wireless communication protocol; and

a second reader configured to control access through the second access facility, wherein the first reader is configured to provide the secret to the second reader either directly from the first reader to the second reader or through a controller connected between the first reader and the second reader, and wherein the second reader is further configured to perform ranging of the device using the secret and a second communication protocol different than the first communication protocol to identify intent information, wherein the second communication protocol is ultra-wide band (UWB);

wherein access through one of the first access facility or the second access facility is coordinated based on the intent information.

10. The access control system of claim 9 , further comprising:

a third access facility; and

a third reader configured to control access through the third access facility and receive the secret from the first reader, wherein the third reader is further configured to perform ranging of the device using the secret to identify further intent information;

wherein access through one of the first access facility, the second access facility, or the third access facility is coordinated based on the intent information.

11. The access control system of claim 9 , wherein the access control system is configured to terminate ranging by the second reader in response to determining a user of the device is moving away from the second reader based on the intent information.

12. The access control system of claim 9 , wherein the first reader does not perform ranging of the device for identifying intent information for the device.

13. The access control system of claim 9 , wherein the first reader is further configured to perform ranging of the device using the secret and the second communication protocol to identify further intent information.

14. The access control system of claim 9 , wherein the first communication protocol is Bluetooth Low Energy (BLE).

15. A method for providing access control, the method comprising:

receiving a credential by a first reader associated with a first access facility using a first communication protocol from a device that stores the credential, wherein the first communication protocol is a low energy wireless communication protocol;

establishing a secret with the device using the first communication protocol;

providing the secret from the first reader to a plurality of second readers associated with respective second access facilities;

identifying intent information for the device by performing ranging of the device by at least a plurality of the first reader and second readers using the secret and a second communication protocol different than the first communication protocol, wherein the second communication protocol is ultra-wide band (UWB); and

coordinating access through the first access facility and the respective access facilities based on the intent information.

16. The method of claim 15 , further comprising:

determining, from the intent information, that a user of the device is moving away from a respective one of the plurality of second readers; and

terminating ranging of the device by the respective one of the plurality of second readers in response to determining the user is moving away from the respective one of the plurality of second readers.

17. The method of claim 15 , wherein providing the secret from the first reader to the plurality of second readers comprises providing the secret to the plurality of second readers through a controller.

18. The method of claim 15 , wherein the first communication protocol is Bluetooth Low Energy (BLE).

19. The method of claim 1 , wherein the secret is a scrambled time stamp (STS).

20. The access control system of claim 9 , wherein the secret is a scrambled time stamp (STS).