System and method for wireless communication of uncompressed video having power saving capability

• US 7,995,507 B2
• Filed: 10/05/2007
• Issued: 08/09/2011
• Est. Priority Date: 12/04/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Singh, Harkirat, Shao, Huai-Rong, Ngo, Chiu, Qin, Xiangping
• Primary Examiner(s): Jung; Min
• Application Number:
  US11/868,364
• Publication Number:
  US 20080130540A1
• Time in Patent Office: 1,404 Days
• Field of Search: None
• US Class Current: 370/311
• 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 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of efficient scheduling for portable devices communicating with a coordinator over a network is disclosed. The method includes: listening for beacons broadcasted by a coordinator; assigning, by the coordinator, a single contiguous time block (CTB) for portable devices during a superframe defined by consecutive beacons; scheduling a single wake period of one of the portable devices, which overlaps inclusively with consecutive beacons and the single CTB; and minimizing duration of the single wake period of the portable device. The single CTB may be arranged next to one of the consecutive beacons. The method may further comprise assigning, by the coordinator, a single random access time block (RATB) for the one of the portable devices so as to overlap with the single wake period. The RATB may be arranged next to one of consecutive beacons. The CTB may be arranged next to the RATB. The CTB may be arranged next to one of the consecutive beacons.

Claims

1. A method of scheduling for portable devices communicating with a coordinator over a network, the method comprising:

listening for a series of scheduled beacons broadcasted by a coordinator;

assigning, by the coordinator, at least one contiguous time block (CTB) including a CTB for a portable device during a superframe defined by first and second consecutive beacons; and

scheduling a single wake period of the portable device, that overlaps with one of the first and second consecutive beacons and the single CTB, wherein the single wake period of the portable device is minimized.

2. The method of claim 1, wherein the CTB for the portable device is arranged immediately next to one of the first and second consecutive beacons.

3. The method of claim 1, further comprising assigning a single random access time block (RATB) so as to overlap with the single wake period.

4. The method of claim 3, wherein the RATB is arranged immediately next to one of the first and second consecutive beacons.

5. The method of claim 4, wherein the CTB for the portable device is arranged immediately next to the RATB.

6. The method of claim 4, wherein the CTB for the portable device is arranged immediately next to the one of the first and second consecutive beacons.

7. The method of claim 1, wherein the portable device listens to at least one of the series of scheduled beacons and uses the assigned CTB or an assigned random access time block (RATB) for communicating with the coordinator or other portable devices in the network.

8. The method of claim 1, wherein the single wake period is minimized based on setting a duration of the single wake period to a sum of durations of the first and second consecutive beacons and the single CTB.

9. A system for scheduling for portable devices communicating with a coordinator over a network, the system comprising:

a coordinator configured to broadcast a series of beacons and to assign at least one contiguous time block (CTB) and a random access time block (RATB) for a superframe defined by first and second consecutive beacons, and

a portable device configured to listen for the series of beacons from the coordinator, wake up during a wake period for the superframe, and communicate with the coordinator,

wherein the wake period of the portable device overlaps with the following;

one of the first and second consecutive beacons, a CTB for the portable device, and the RATB, and wherein the single wake period of the portable device is minimized.

10. The system of claim 9, wherein the coordinator assigns a single random access time block (RATB) so as to overlap with the single wake period, wherein the coordinator arranges the CTB for the portable device immediately next to one of the first and second consecutive beacons, and wherein the coordinator arranges the RATB immediately next to one of the first and second consecutive beacons.

11. The system of claim 10, wherein the coordinator arranges the CTB for the portable device immediately next to the RATB.

12. The system of claim 10, wherein the coordinator arranges the CTB for the portable device immediately next to the one of the first and second consecutive beacons.

13. A system for scheduling for portable devices communicating with a coordinator over a network, the system comprising:

means for listening for a series of scheduled beacons broadcasted by a coordinator;

means for assigning, by the coordinator, at least one contiguous time block (CTB) including a CTB for a portable device during a superframe defined by first and second consecutive beacons;

means for scheduling a single wake period of the portable device that overlaps with one of the first and second consecutive beacons and the single CTB, wherein the single wake period of the portable device is minimized.

14. The system of claim 13, wherein the coordinator assigns a random access time block (RATB) so as to overlap with the single wake period, wherein the CTB for the portable device is arranged immediately next to one of the first and second consecutive beacons, and wherein the RATB is arranged immediately next to one of the first and second consecutive beacons.

15. The system of claim 14, wherein the CTB for the portable device is arranged immediately next to the RATB.

16. The system of claim 14, wherein the CTB for the portable device is arranged immediately next to the one of the first and second consecutive beacons.

17. The system of claim 14, wherein the CTB for the portable device is provided across two consecutive superframes.

18. The system of claim 13, wherein a duration of the continuous awake period is substantially longer than sum of durations of the RATB, the CTB, and one beacon.

19. A method of scheduling for portable devices communicating with a coordinator over a network, the method comprising:

assigning, by the coordinator, a contiguous time block (CTB) for a portable device during a superframe defined by first and second consecutive beacons, and

assigning next to the CTB, by the coordinator, a single random access time block (RATB) for the network,

wherein at least one of the single CTB and the single RATB is arranged immediately next to one of the first and second consecutive beacons, wherein the plurality of devices includes at least one alternating current powered device and at least one battery powered portable device, and wherein the contention access period is assigned for contention of said battery powered portable devices, and excludes the alternating current powered devices.

20. A method of scheduling for portable devices communicating with a coordinator over a network, the method comprising:

listening for a series of scheduled beacons broadcasted by a coordinator;

scheduling a single wake period of one of the plurality of portable devices, which overlaps with one of the first and second consecutive beacons and a contiguous time block (CTB) for the one of the plurality of portable devices, wherein the single wake period of the one of the plurality of portable devices is minimized.

21. The method of claim 20, further comprising scheduling the wake period of the one of the plurality of portable devices to overlap inclusively with a random access time block (RATB) assigned for the network.

22. The method of claim 21, wherein the single RATB is exclusively assigned for contention of the plurality of portable device such that alternating current (AC) powered devices are prohibited from participating in the contention in the single RATB.

23. A method of scheduling communications for a plurality of devices over a network, the method comprising:

transmitting, during a beacon period of at least one of a plurality of superframes, at least one beacon to a plurality of devices including at least a first battery powered portable device;

allocating, during at least one of the plurality of superframes, a contention access period for at least a portion of the plurality of devices; and

allocating, during at least one of the plurality of superframes, at least one channel time allocation period, wherein each channel time allocation period is allocated to one of the devices, wherein the channel time allocation periods include at least a first channel time allocation period allocated to the first battery powered portable device, and wherein the beacon period, the contention access period, and the first channel time allocation period are consecutive in time, wherein the contention access period precedes the beacon period.

24. The method of claim 23, wherein the plurality of devices includes at least one alternating current powered device and wherein the contention access period is assigned for contention of battery powered portable devices to the exclusion of alternative current powered devices.

25. A method of scheduling communications at a battery powered portable device in a network, the method comprising:

receiving, at the battery powered portable device, during a beacon period of at least one of a plurality of superframes, at least one beacon from a coordinator to a plurality of devices including the battery powered portable device;

receiving, at the battery powered portable device, during at least one of the plurality of superframes and from the coordinator, an allocation of a contention access period for at least a portion of the plurality of devices;

receiving, at the battery powered portable device, during at least one of the plurality of superframes, at least one channel time allocation period for the battery powered portable device, wherein the beacon period, the contention access period, and the channel time allocation period for the device are consecutive in time;

scheduling a wake period substantially overlapping with the beacon period, the contention access period, and the channel time allocation period for the battery powered portable device; and

scheduling a sleep period immediately before or after the wake period.

26. The method of claim 25, wherein the plurality of devices includes at least one alternating current powered device and wherein the contention access period is assigned for contention of battery powered portable devices to the exclusion of alternative current powered devices.

27. The method of claim 25, wherein the contention access period precedes the beacon period.

28. The method of claim 25, wherein transitions between the sleep period and the wake period are minimized.