Receiver scheduling in wireless networks

• US 9,674,858 B2
• Filed: 11/11/2014
• Issued: 06/06/2017
• Est. Priority Date: 11/30/2001
• Status: Expired due to Term

• Current Assignee: III Holdings 1, LLC (Intellectual Ventures LLC)
• Original Assignee: III Holdings 1, LLC (Intellectual Ventures LLC)
• Inventors: Elliott, Brig Barnum, Pearson, David Spencer
• Primary Examiner(s): Patel, Ajit
• Assistant Examiner(s): PEREZ, JULIO R
• Application Number:
  US14/538,563
• Publication Number:
  US 20150063325A1
• Time in Patent Office: 938 Days
• Field of Search: 455574, 4551275, 4553431, 4551271, 4553432-3434, 370440, 370445, 370311
• CPC Class Codes: H04J 3/16 in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted H04J3/17, H04J3/24 take precedence
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless apparatus may receive scheduling definitions from a networking device. The wireless apparatus may determine, from the scheduling definitions, downlink transmission times and to start a timer at one of the determined downlink transmission times. The wireless apparatus may discontinue reception at expiration of the timer. The wireless apparatus may also, in response to reception of a downlink transmission, transmit an acknowledgement and to discontinue reception before the timer has expired.

Claims

1. A wireless apparatus comprising:

a wireless transceiver, communicatively coupled with a processor within the wireless apparatus, the wireless transceiver configured to transmit and receive communications via a wireless network;

the processor configured to receive a first schedule definition and a second schedule definition from a networking device of the wireless network;

the processor further configured to determine, from the received first schedule definition and the received second schedule definition, downlink reception times;

the processor further configured to start a timer at one of the determined downlink reception times;

the processor further configured to determine, during a duration of the timer, whether a downlink transmission including a message is being communicated from the networking device to the wireless apparatus;

the processor further configured to discontinue reception at expiration of the timer;

the processor further configured, in response to reception of the downlink transmission, to transmit an acknowledgement and to discontinue reception before the timer has expired; and

the wireless transceiver further configured to adjust an uplink transmission time for a communication to the networking device based on a determined amount of time drift.

2. The wireless apparatus of claim 1, wherein the reception of the first and second schedule definitions comprises receipt in a plurality of time periods.

3. The wireless apparatus of claim 1 further comprising:

the processor further configured to affiliate with the networking device of the wireless network based on signal strength.

4. The wireless apparatus of claim 3, wherein the affiliation further comprises an assignment of an affiliation identifier to the wireless apparatus.

5. The wireless apparatus of claim 4, wherein the first or second schedule definition comprises a plurality of affiliation identifiers corresponding to a portion of a plurality of apparatuses.

6. The wireless apparatus of claim 1, wherein a portion of the wireless transceiver is powered down during a time period other than the determined downlink reception times.

7. The wireless apparatus of claim 6, wherein the powered down portion of the wireless transceiver is activated for the determined downlink reception times.

8. A method of communicating within a wireless network via a wireless apparatus, the method comprising:

receiving, by the wireless apparatus, a first schedule definition and a second schedule definition indicating downlink reception times;

starting, by the wireless apparatus, a timer at one of the indicated downlink reception times;

determining, by the wireless apparatus during a duration of the timer, whether a downlink transmission including a message is being communicated from a networking device to the wireless apparatus;

discontinuing, by the wireless apparatus, reception at expiration of the timer;

transmitting, by the wireless apparatus in response to receiving the downlink transmission, an acknowledgement and discontinuing reception before the timer has expired; and

adjusting, by the wireless apparatus, an uplink transmission time for a communication to the networking device based on a determined amount of time drift.

9. The method of claim 8, wherein the first and second schedule definitions are received from a networking device of the wireless network.

10. The method of claim 8, wherein, during a plurality of time periods which are not allocated to the wireless apparatus, a portion of the wireless apparatus is powered down for a period of time.

11. The method of claim 8, wherein the received first and second schedule definitions each include a first time period allocated for transmission and a second time period allocated for reception.

12. The method of claim 11, wherein the received first and second schedule definitions each further include a plurality of transmission and reception time periods corresponding to a plurality of other wireless apparatuses.

13. The method of claim 12 further comprising:

affiliating, by the wireless apparatus, with a networking device of the wireless network.

14. The method of claim 13 further comprising:

un-affiliating, subsequent to the affiliating, with the networking device after a specified period of time when the wireless apparatus has stopped receiving schedule definitions identifying other time periods allocated to the wireless apparatus.

15. The method of claim 14, wherein, subsequent to the un-affiliating with the networking device after the specified period of time, the wireless apparatus affiliates with a different networking device of the wireless network based on signal strength.

16. A wireless network device comprising:

a wireless transceiver, communicatively coupled with a processor, the wireless transceiver configured to transmit and receive communications via a wireless network;

the wireless transceiver configured to transmit a first schedule definition and a second schedule definition indicating downlink transmission times allocated for one of a plurality of wireless apparatuses within the wireless network;

the processor further configured to start a timer, for the one of the plurality of wireless apparatuses, at one of the indicated downlink transmission times;

the processor further configured to determine, during a duration of the timer, whether a downlink transmission including a message will be communicated to the one of the plurality of wireless apparatuses;

the processor further configured to discontinue transmission at expiration of the timer;

the processor further configured to send the downlink transmission to the one of the plurality of wireless apparatuses and to discontinue transmission when an acknowledgement is received before the timer has expired; and

the wireless transceiver configured to receive information from one of the plurality of wireless apparatuses at an uplink transmission time that is adjusted based on a determined amount of time drift.

17. The wireless network device of claim 16, wherein the one of the plurality of wireless apparatuses affiliates with the wireless network device or a different wireless network device based on signal strength.

18. A method performed by a wireless apparatus, the method comprising:

transmitting and receiving, by the wireless apparatus, communications via a wireless network;

receiving, by the wireless apparatus, a first schedule definition and a second schedule from a networking device of the wireless network;

determining, by the wireless apparatus from the received first schedule definition and the received second schedule definition, downlink reception times;

starting, by the wireless apparatus, a timer at one of the determined downlink reception times;

determining, by the wireless apparatus during a duration of the timer, whether a downlink transmission including a message is being communicated from the networking device to the wireless apparatus;

discontinuing, by the wireless apparatus, reception at expiration of the timer;

transmitting, by the wireless apparatus in response to reception of the downlink transmission, an acknowledgement and discontinuing reception before the timer has expired; and

adjusting, by the wireless apparatus, an uplink transmission time for a communication to the networking device based on a determined amount of time drift.

19. The method of claim 18, wherein the reception of the first and second schedule definitions comprises receipt in a plurality of time periods.

20. The method of claim 18 further comprising:

affiliating, by the wireless apparatus, with the networking device of the wireless network based on signal strength.

21. The method of claim 20, wherein the affiliation further comprises an assignment of an affiliation identifier to the wireless apparatus.

22. The method of claim 21, wherein the first or second schedule definition comprises a plurality of affiliation identifiers corresponding to a portion of a plurality of apparatuses.

23. The method of claim 18, wherein a portion of a wireless transceiver is powered down during a time period other than the determined downlink reception times.

24. The method of claim 23, wherein the powered down portion of the wireless transceiver is activated for the determined downlink reception times.