Access and power management for centralized networks

• US 10,080,195 B2
• Filed: 10/13/2017
• Issued: 09/18/2018
• Est. Priority Date: 01/30/2009
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Ho, Jin-Meng
• Primary Examiner(s): Pezzlo, John
• Application Number:
  US15/783,422
• Publication Number:
  US 20180041963A1
• Time in Patent Office: 340 Days
• Field of Search: 370348, 370252, 370311, 370329
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 52/0248 dependent on the time of the day, e.g. according to expected transmission activity
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/06 using polling
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A system and method for managing power in a subnet having a hub in communication with one or more nodes is disclosed. The hub and nodes communicate using one or more non-contention access methods, such as scheduled, polled or posted access. The node may enter a sleep or hibernation state while no scheduled, polled or posted allocation interval is pending. The hibernation state allows the node to hibernate through one or more entire beacon periods. In the sleep state, the node may be asleep between any scheduled, polled and posted allocation intervals for the node or during another node'"'"'s scheduled allocation interval in a current beacon period. By selecting which access scheme is in use, the node and hub can increase the node'"'"'s chances to be in hibernation or sleep state and minimize power consumption.

Claims

1. A method of macroscopic power management by a body area network (BAN) node, comprising:

transmitting a connection request frame to a network hub, the connection request frame including;

a first requested wakeup field specifying a unit of beacon periods; and

a second requested wakeup field specifying an intended next wakeup beacon period;

receiving a connection assignment frame from the network hub, the connection assignment frame including a first assigned wakeup field associated with a periodic allocation and a second assigned wakeup field associated with an assigned next wakeup beacon period;

entering an inactive state; and

waking up based on the first assigned wakeup field and the second assigned wakeup field.

2. The method of claim 1, wherein the entering the inactive state includes suspending a transmission and a reception of frames.

3. The method of claim 1, wherein the waking up includes resuming a transmission and a reception of frames.

4. The method of claim 1, wherein the periodic allocation includes only an m-periodic allocation when the first assigned wakeup field has an integer value not equal to 1.

5. The method of claim 1, wherein the periodic allocation includes only a 1-periodic allocation when the first assigned wakeup field has an integer value equal to 1.

6. The method of claim 1, wherein the waking up includes waking up in each of an allocated set of wakeup beacon periods based on the first assigned wakeup field and the second assigned wakeup field if the periodic allocation is not equal to 1.

7. The method of claim 1, wherein the waking up includes waking up in each of the beacon periods if the periodic allocation is equal to 1.

8. A body area network (BAN) device, comprising:

a memory storing a set of instructions for performing macroscopic power management;

a processor coupled to the memory, and upon implementing the set of instructions, the processor configured to cause the BAN device to;

transmit a connection request frame to a network hub, the connection request frame including;

a first requested wakeup field specifying a unit of beacon periods; and

a second requested wakeup field specifying an intended next wakeup beacon period;

receive a connection assignment frame from the network hub, the connection assignment frame including a first assigned wakeup field associated with a periodic allocation and a second assigned wakeup field associated with an assigned next wakeup beacon period;

enter an inactive state; and

wake up based on the first assigned wakeup field and the second assigned wakeup field.

9. The BAN device of claim 8, wherein during the inactive state, the processor is configured to cause the BAN device to suspend a transmission and a reception of frames.

10. The BAN device of claim 8, wherein after the inactive state, the processor is configured to cause the BAN device to resume a transmission and a reception of frames.

11. The BAN device of claim 8, wherein the periodic allocation includes only an m-periodic allocation when the first assigned wakeup field has an integer value not equal to 1.

12. The BAN device of claim 8, wherein the periodic allocation includes only a 1-periodic allocation when the first assigned wakeup field has an integer value equal to 1.

13. The BAN device of claim 8, wherein the processor is configured to cause the BAN device to wake up in each of an allocated set of wakeup beacon periods based on the first assigned wakeup field and the second assigned wakeup field if the periodic allocation is not equal to 1.

14. The BAN device of claim 8, wherein the processor is configured to cause the BAN device to wake up in each of the beacon periods if the periodic allocation is equal to 1.

15. A tangible nontransitory storage medium storing a set of instructions, which upon being implemented by a processor, causes the processor to perform a macroscopic power management scheme, comprising:

transmitting, by a body area network (BAN) node, a connection request frame to a network hub, the connection request frame including;

a first requested wakeup field specifying a unit of beacon periods; and

a second requested wakeup field specifying an intended next wakeup beacon period;

receiving, by the BAN node, a connection assignment frame from the network hub, the connection assignment frame including a first assigned wakeup field associated with a periodic allocation and a second assigned wakeup field associated with an assigned next wakeup beacon period;

entering, by the BAN node, an inactive state; and

waking up, by the BAN node, based on the first assigned wakeup field and the second assigned wakeup field.

16. The tangible nontransitory storage medium of claim 15, wherein the entering the inactive state includes suspending, by the BAN node, a transmission and a reception of frames, and the waking up includes resuming, by the BAN node, the transmission and the reception of frames.

17. The tangible nontransitory storage medium of claim 15, wherein the periodic allocation includes only an m-periodic allocation when the first assigned wakeup field has an integer value not equal to 1.

18. The tangible nontransitory storage medium of claim 15, wherein the periodic allocation includes only a 1-periodic allocation when the first assigned wakeup field has an integer value equal to 1.

19. The tangible nontransitory storage medium of claim 15, wherein the waking up includes waking up, by the BAN node, in each of an allocated set of wakeup beacon periods based on the first assigned wakeup field and the second assigned wakeup field if the periodic allocation is not equal to 1.

20. The tangible nontransitory storage medium of claim 15, wherein the waking up includes waking up, by the BAN node, in each of the beacon periods if the periodic allocation is equal to 1.