Multi-channel communication scheme for medical body area network (MBAN) to meet duty cycle regulation
A system ( 52 ) and a method maintain a medical body area network (MBAN) ( 62 ). Devices ( 56, 58 ) of the MBAN ( 62 ) are communicated ( 152 ) with over one or more channels of the MBAN ( 62 ). The one or more channels include a primary channel, and each of the devices ( 56, 58 ) is assigned to one of the one or more channels. Further, a duty cycle of each of the one or more channels is continuously monitored ( 156 ). In response to the duty cycle of the primary channel meeting or exceeding a duty cycle limit, a device ( 56, 58 ) of the devices ( 56, 58 ) is moved ( 158 ) to a secondary channel.
1. A system for maintaining a medical body area network (MBAN), said system comprising:
at least one controller configured to:
communicate with devices of the MBAN over one or more channels of the MBAN, the one or more channels including a primary channel that includes a minimum allowed priority level, and each of the devices assigned to one of the one or more channels, wherein each of the devices includes a priority;
continuously monitor a duty cycle of each of the one or more channels; and
in response to the duty cycle of the primary channel meeting or exceeding a duty cycle limit, move a device of the devices to a secondary channel of the one or more channels based on the priority level of the device relative to the minimum allowed priority level;
wherein the at least one controller is further configured to communicate with the devices over each of the primary and secondary channels using a beacon-based superframe structure;
wherein periods of active transmission on the primary and secondary channels are non-overlapping;
wherein beacons of the primary channel include data regarding the superframe structure of the secondary channel.
2. The system according to claim 1 , wherein the controller is further configured to:
in response to the duty cycle of the primary channel meeting or exceeding the duty cycle limit, initiate operation on the secondary channel.
3. The system according to claim 1 , wherein the at least one controller is further configured to:
in response to a total duty cycle of the one or more channels falling below the duty cycle limit and the one or more channels including the secondary channel, move all devices assigned to the secondary channel of the one or more channels to the primary channel.
4. The system according to claim 3 , wherein the at least one controller is further configured to:
in response to the total duty cycle of the one or more channels falling below the duty cycle limit and the one or more channels including the secondary channel, cease operation on the secondary channel.
5. The system according to claim 1 , wherein the superframe structures of the primary and secondary channels share a common network identifier (ID) and device short addresses.
6. The system according to claim 1 , wherein the primary channel includes a channel allocated for MBAN use with a duty cycle limit, and wherein the secondary channel includes a channel allocated for general use.
7. A method for maintaining a medical body area network (MBAN), said method comprising:
communicating with devices of the MBAN over one or more channels of the MBAN, the one or more channels including a primary channel that includes a minimum allowed priority level and secondary channel, and each of the devices assigned to one of the one or more channels, wherein each of the devices includes a priority level;
continuously monitoring a duty cycle of each of the one or more channels; and
in response to the duty cycle of the primary channel meeting or exceeding a duty cycle limit, moving a device of the devices to a secondary channel based on the priority level of the device relative to the minimum allowed priority level;
wherein the communicating with the devices over each of the primary and secondary channels uses a beacon-based superframe structure;
wherein periods of active transmission on the primary and secondary channels are non-overlapping;
wherein beacons of the primary channel include data regarding the superframe structure of the secondary channel.
8. The method according to claim 7 , further including:
in response to a total duty cycle of the one or more channels falling below the duty cycle limit and the one or more channels including the secondary channel, moving all devices assigned to the secondary channel of the one or more channels to the primary channel.
9. The method according to claim 8 , further including:
in response to the total duty cycle of the one or more channels falling below the duty cycle limit and the one or more channels including the secondary channel, ceasing operation on the secondary channel.
10. The method according to claim 7 , wherein the primary channel includes a channel allocated for MBAN use with a duty cycle limit, and wherein the secondary channel includes a channel allocated for general use.
11. At least one controller configured to perform the method according to claim 7 .
12. The method according to claim 7 , further including,
continuously monitoring a duty cycle of each of the one or more channels; and
in response to the duty cycle of the primary channel exceeding a duty cycle limit, moving a device of the devices to the secondary channel.