Shared radio arbitration
A radio arbiter circuit is disclosed comprising a digital connection to a radio circuit, which comprises a transmitter, a receiver, and a radio frequency antenna; a first connection to a first network link controller, which comprises a first baseband processor and a first interface to a processor bus; a second connection to a second network link controller, which comprises a second baseband processor and a second interface to a processor bus; a multiplexer for coupling either the first network link controller or the second network link controller to the radio circuit via the digital connection; and a control input to the multiplexer for selecting which network link controller has control of the radio circuit.
1. A radio arbiter circuit comprising:
a digital connection to a radio circuit, which comprises a transmitter, a receiver, and a radio frequency antenna;
a first connection to a first network link controller, which comprises a first baseband processor and a first interface to a processor bus;
a second connection to a second network link controller, which comprises a second baseband processor and a second interface to a processor bus;
a multiplexer for coupling either the first network link controller or the second network link controller to the radio circuit via the digital connection; and
a control input to the multiplexer for selecting which network link controller has control of the radio circuit,
wherein
the control input is set to select the first network link controller;
a first radio request from the first network link controller is active and associated with a first priority value; and
the radio arbiter circuit is configured to:
accept a second radio access request from the second network link controller comprising a second priority value; and
based at least in part on a comparison between the first priority value and the second priority value:
send a power down signal to the radio circuit; and
set the control input to select the second network link controller;
wherein the first radio request is further associated with a time-sensitive attribute, and
the radio arbiter circuit is further configured to, based at least in at least in part on a comparison between the first priority value and the second priority value, send an aborted request signal to the first network link controller.
2. The radio arbiter circuit of claim 1 , further configured to operate in:
a static operating mode wherein the control input is set to a predetermined value, or
a dynamic operating mode wherein the control input is determined upon receipt of a radio access request from either the first or the second network link controller.
3. The radio arbiter circuit of claim 1 wherein the radio arbiter circuit is configured to perform the following ordered steps:
accept the first radio access request from the first network link controller to perform a first task, the request comprising the first priority value;
determine the control input to grant control of the radio circuit by the first network link controller;
accept the second radio access request from the second network link controller to perform a second task, the request comprising the second priority value greater than the first priority value; and
prior to completion of the first radio access, determine the control input to grant control of the radio circuit by the second network link controller.
4. The radio arbiter circuit of claim 3 wherein the radio arbiter circuit is further configured to:
increment the first priority value.
5. The radio arbiter circuit of claim 1 further configured to:
determine a first access request type from the first radio access request;
determine a priority adjustment value based at least in part on the first access request type; and
adjust the first priority value based at least in part on the priority adjustment value.
6. A radio arbiter circuit comprising:
a digital connection to a radio circuit, which comprises a transmitter, a receiver, and a radio frequency antenna;
a first connection to a first network link controller, which comprises a first baseband processor and a first interface to a processor bus;
a second connection to a second network link controller, which comprises a second baseband processor and a second interface to a processor bus;
a multiplexer for coupling either the first network link controller or the second network link controller to the radio circuit via the digital connection; and
a control input to the multiplexer for selecting which network link controller has control of the radio circuit,
wherein
the control input is set to select the first network link controller;
a first radio request from the first network link controller is active and associated with a first priority value; and
the radio arbiter circuit is configured to:
accept a second radio access request from the second network link controller comprising a second priority value, and
based at least in part on a comparison between the first priority value and the second priority value:
send a power down signal to the radio circuit; and
set the control input to select the second network link controller;
Wherein the first radio request is not associated with a time-sensitive attribute, and the radio arbiter circuit is further configured to:
based at least in part on a comparison between the first priority value and the second priority value, send a delayed request signal to the first network link controller, and
upon completion of the second radio access request, set the control input to select the first network link controller.
7. The radio arbiter circuit of claim 6 , further configured to operate in:
a static operating mode wherein the control input is set to a predetermined value, or
a dynamic operating mode wherein the control input is determined upon receipt of a radio access request from either the first or the second network link controller.
8. The radio arbiter circuit of claim 6 wherein the radio arbiter circuit is configured to perform the following ordered steps:
accept the first radio access request from the first network link controller to perform a first task, the request comprising the first priority value;
determine the control input to grant control of the radio circuit by the first network link controller,
accept the second radio access request from the second network link controller to perform a second task, the request comprising the second priority value greater than the first priority value, and
prior to completion of the first radio access, determine the control input to grant control of the radio circuit by the second network link controller.
9. The radio arbiter circuit of claim 8 wherein the radio arbiter circuit is further configured to:
increment the first priority value.
10. The radio arbiter circuit of claim 6 further configured to:
determine a first access request type from the first radio access request;
determine a priority adjustment value based at least in part on the first access request type; and
adjust the first priority value based at least in part on the priority adjustment value.
11. An integrated circuit comprising:
a CPU,
a memory,
a first network link controller configured to communicate with a Zigbee network,
a second network link controller configured to communicate with a Bluetooth network,
a bus coupling the CPU to the memory, the first network link controller, and the second network link controller, and
a radio arbiter circuit comprising:
a digital connection to a radio circuit, which comprises a transmitter, a receiver, and a radio frequency antenna;
a first connection to the first network link controller comprising a first baseband processor;
a second connection to the second network link controller comprising a second baseband processor;
a multiplexer for coupling either the first network link controller or the second network link controller to the radio circuit via the digital connection; and
a control input to the multiplexer for selecting which network link controller has control of the radio circuit,
wherein
the control input is set to select the first network link controller;
a first radio request from the first network link controller is active and associated with a first priority value; and
the radio arbiter circuit is configured to;
accept a second radio access request from the second network link controller comprising a second priority value; and
based at least in part on a comparison between the first priority value and the second priority value:
send a power down signal to the radio circuit; and
set the control input to select the second network link controller, wherein the first radio request is further associated with a time-sensitive attribute, and
the radio arbiter circuit is further configured to, based at least in part on a comparison between the first priority value and the second priority value, send an aborted request signal to the first network link controller.
12. The integrated circuit of claim 11 wherein the radio arbiter circuit is further configured to operate in:
a static operating mode wherein the control input is set to a predetermined value, or
a dynamic operating mode wherein the control input is determined upon receipt of a radio access request from either the first or the second network link controller.
13. The integrated circuit of claim 11 wherein the radio arbiter circuit is further configured to perform the following ordered steps:
accept the first radio access request from the first network link controller to perform a first task, the request comprising the first priority value;
determine the control input to grant control of the radio circuit by the first network link controller;
accept the second radio access request from the second network link controller to perform a second task, the request comprising the second priority value greater than the first priority value; and
determine the control input to grant control of the radio circuit by the second network link controller.
14. The integrated circuit of claim 13 wherein the radio arbiter circuit is further configured to:
Increment the first priority value.
15. The integrated circuit of claim 11 further configured to:
determine a first access request type from the first radio access request;
determine a priority adjustment value based at least in part on the first access request type; and
adjust the first priority value based at least in part on the priority adjustment value.
16. An integrated circuit comprising:
a CPU,
a memory,
a first network link controller configured to communicate with a Zigbee network,
a second network link controller configured to communicate with a Bluetooth network,
a bus coupling the CPU to the memory, the first network link controller, and the second network link controller, and
a radio arbiter circuit comprising:
a digital connection to a radio circuit, which comprises a transmitter, a receiver, and a radio frequency antenna;
a first connection to the first network link controller comprising baseband processor;
a second connection to the second network link controller comprising a second baseband processor;
a multiplexer for coupling either the first network link controller or the second network link controller to the radio circuit via the digital connection; and
a control input to the multiplexer for selecting which network link controller has control of the radio circuit,
wherein
the control input is set to select the first network link controller,
a first radio request from the first network link controller is active and associated with a first priority value; and
the radio arbiter circuit is configured to:
accept a second radio access request from the second network link controller comprising a second priority value; and
based at least in part on a comparison between the first priority value and the second priority value:
send a power down signal to the radio circuit; and
set the control input to select the second network link controller,
wherein the first radio request is not associated with a time-sensitive attribute, and the radio arbiter circuit is further configured to:
based at least in part on a comparison between the first priority value and the second priority value, send a delayed request signal to the first network link controller, and
upon completion of the second radio access request, set the control input to select the first network link controller.
17. The integrated circuit of claim 16 wherein the radio arbiter circuit is further configured to operate in:
a static operating mode wherein the control input is set to a predetermined value, or
a dynamic operating mode wherein the control input is determined upon receipt of a radio access request from either the first or the second network link controller.
18. The integrated circuit of claim 16 wherein the radio arbiter circuit is further configured to perform the following ordered steps:
accept the first radio access request from the first network link controller to perform a first task, the request comprising the first priority value;
determine the control input to grant control of the radio circuit by the first network link controller,
accept the second radio access request from the second network link controller to perform a second task, the request comprising the second priority value greater than the first priority value; and
determine the control input to grant control of the radio circuit by the second network link controller.
19. The integrated circuit of claim 18 wherein the radio arbiter circuit is further configured to:
Increment the first priority value.
20. The integrated circuit of claim 16 further configured to:
determine a first access request type from the first radio access request;
determine a priority adjustment value based at least in part on the first access request type; and
adjust the first priority value based at least in part on the priority adjustment value.