Method for wireless personal area network communication with enhanced contention access period mechanism, and system for the same

• US 20050089058A1
• Filed: 10/27/2004
• Published: 04/28/2005
• Est. Priority Date: 10/28/2003
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hong, Jin-woo, Sung, Hyun-ah, Bae, Dae-gyu
• Application Number:
  US10/973,910
• Publication Number:
  US 20050089058A1
• Time in Patent Office: Days
• US Class Current: 370/445
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A method and system for increasing frame transmission efficiency in a Wireless Personal Area Network (WPAN) are provided. The method for wireless personal area network communication includes receiving information on a pseudo contention access period that allows data to be transmitted in contention in a superframe in which a beacon is not received from a device that schedules superframes if a number of consecutive beacon reception fails does not exceed a predetermined value, and transmitting data to a device comprised in a piconet in contention during the pseudo contention access period using the information on the pseudo contention access period. According to the method and the system, data transmission efficiency during a Contention Access Period (CAP) in the WPAN is increased.

Claims

1. A method for wireless personal area network communication, comprising:

receiving information on a pseudo contention access period that allows data to be transmitted in contention in a superframe in which a beacon is not received from a device that schedules superframes if a number of consecutive beacon reception fails does not exceed a predetermined value; and

transmitting data to a device in a piconet in contention during the pseudo contention access period using the information on the pseudo contention access period.

2. The method of claim 1, wherein the pseudo contention access period is within a contention access period comprised in a superframe comprising the pseudo contention access period.

3. The method of claim 1, wherein the receiving of the information comprises:

receiving a beacon broadcast by the device that schedules the superframes; and

acquiring the information on the pseudo contention access period from a predetermined portion of the received beacon.

4. The method of claim 3, wherein the information on the pseudo contention access period is acquired from information recorded in a payload comprised in a pseudo contention access period information element field defined in a frame body of the received beacon.

5. The method of claim 3, wherein the information on the pseudo contention access period is acquired from information recorded in a pseudo contention access period parameter added to a piconet synchronization parameters field comprised in the received beacon.

6. The method of claim 4, wherein the recorded information indicates a time when the pseudo contention access period ends.

7. The method of claim 5, wherein the recorded information indicates a time when the pseudo contention access period ends.

8. The method of claim 1, further comprising receiving information on a changed pseudo contention access period from the device that schedules the superframes.

9. The method of claim 8, wherein the received information on the changed pseudo contention access period is acquired by receiving a beacon broadcast by a device that schedules the superframes, and acquiring the information on the pseudo contention access period from a predetermined portion of the received beacon.

10. The method of claim 8, wherein the received information on the changed pseudo contention access period is acquired from information recorded in a payload comprised in a pseudo contention access period change information element field defined in a frame body of the received beacon.

11. The method of claim 9, wherein the received information on the changed pseudo contention access period is acquired from information recorded in a changed pseudo contention access period parameter added to a piconet parameter change information element comprised in the received beacon.

12. The method of claim 10, wherein the recorded information indicates a time when the changed pseudo contention access period ends and a superframe with which the changed pseudo contention access period begins.

13. The method of claim 11, wherein the recorded information indicates a time when the changed pseudo contention access period ends and a superframe with which the changed pseudo contention access period begins.

14. A method for wireless personal area network communication, comprising:

generating a first frame comprising information on a pseudo contention access period, which allows a device to transmit data in contention in a superframe in which a beacon is not received if a number of consecutive beacon reception fails in the device does not exceed a predetermined value, in response to a request to set the pseudo contention access period; and

broadcasting the first frame.

15. The method of claim 14, wherein the first frame is a beacon frame.

16. The method of claim 15, wherein the generating of the first frame comprises adding to a frame body a pseudo contention access period information element field having the information on the pseudo contention access period recorded therein.

17. The method of claim 15, wherein the generating of the first frame comprises adding to a piconet synchronization parameters field a pseudo contention access period parameter having the information on the pseudo contention access period recorded therein.

18. The method of claim 16, wherein the information on the pseudo contention access period indicates a time when the pseudo contention access period ends.

19. The method of claim 17, wherein the information on the pseudo contention access period indicates a time when the pseudo contention access period ends.

20. The method of claim 14, further comprising:

generating a second frame comprising information on a changed pseudo contention access period in response to a request to change the pseudo contention access period; and

broadcasting the second frame.

21. The method of claim 20, wherein the second frame is a beacon frame.

22. The method of claim 21, wherein the generating of the second frame comprises adding to a frame body a pseudo contention access period change information element field having a payload having the information on the changed pseudo contention access period recorded therein.

23. The method of claim 21, wherein the generating of the second frame comprises adding, to a piconet parameter change information element, a pseudo contention access period change parameter having the information on the changed pseudo contention access period recorded therein.

24. The method of claim 22, wherein the recorded information indicates a time when the pseudo contention access period ends and a superframe with which the changed pseudo contention access period begins.

25. The method of claim 23, wherein the recorded information indicates a time when the pseudo contention access period ends and a superframe with which the changed pseudo contention access period begins.

26. A system for wireless personal area network communication, comprising:

a piconet coordinator generating a beacon frame comprising information on a pseudo contention access period, which allows a device to transmit data in contention in a superframe in which a beacon is not received if a number of consecutive beacon reception fails in the device does not exceed a predetermined value, in response to a request to set the pseudo contention access period, and broadcasting the beacon frame; and

at least one device receiving the beacon frame comprising the information on the pseudo contention access period from the piconet coordinator and transmitting data to another device comprised in a piconet in contention using the information on the pseudo contention access period during the pseudo contention access period comprised in a superframe in which the device does not receive a beacon.

27. The system of claim 26, wherein the piconet coordinator generates another beacon frame comprising information on a changed pseudo contention access period in response to a request to change the pseudo contention access period and broadcasts said another beacon frame.

28. The system of claim 27, wherein the information on the changed pseudo contention access period indicates a time when the pseudo contention access period ends and a superframe with which the changed pseudo contention access period begins.