Method and system for coordinating wireless communication of different waveforms in the same frequency band

• US 8,532,034 B2
• Filed: 12/19/2008
• Issued: 09/10/2013
• Est. Priority Date: 12/26/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Shao, Huai-Rong, Ngo, Chiu
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): Alexander, Jenee
• Application Number:
  US12/339,765
• Publication Number:
  US 20090168713A1
• Time in Patent Office: 1,726 Days
• Field of Search: 370/329
• US Class Current: 370/329
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies

Abstract

A method and system for coordinating wireless communication of different waveforms in the same frequency band, is provided, the network including multiple wireless stations of different types operating at the same wireless frequency band but at different waveform formats. Channel bandwidth is allocated by scanning all available channels in the frequency band to detect available channels. When the number of detected available channels is not less than the number of wireless station types, then scheduling and transmitting beacon periods for the different types of wireless stations to different available channels, wherein each type of wireless station may have a dedicated available channel period for wireless communication in parallel with other types of wireless stations.

Claims

1. A method of providing coordination for managing communication of information over one or more wireless channels in a network including multiple wireless stations of different types operating at the same wireless frequency band but at different waveform formats, the method comprising:

allocating channel bandwidth by dividing channel time into one or more superframes, each superframe initiated by a beacon providing schedules for communication of packets of information over one or more channels, wherein each superframe having a structure based on wireless station type, wherein each superframe is bounded by beacons that are different based on station type, said allocating channel bandwidth further including;

scanning all available channels in the frequency band to detect available channels, wherein when the number of detected available channels is same or greater than the number of wireless station types, wherein different types of wireless stations operate at a same wireless frequency band but at different waveform formats; and

then scheduling and transmitting beacon periods for the different types of wireless stations to different available channels, wherein each type of wireless station may have a dedicated available channel period for wireless communication in parallel with other types of wireless stations.

2. The method of claim 1 further comprising:

when the number of detected available channels is smaller than the station types, then for a detected channel, scheduling and transmitting beacon periods for different types of wireless stations for the detected channel, wherein multiple different beacon types for different waveform formats may be scheduled anywhere in each superframe such that one or more reserved channel time blocks and/or contention access periods for each station type may be scheduled in each superframe for serial wireless communication on the detected channel by different station types.

3. The method of claim 2 wherein for serial communication, scheduling beacon periods for different types of wireless stations in the same channel further includes scheduling one or more unreserved channel time blocks or contention access periods in each superframe.

4. The method of claim 2 wherein superframes bounded by beacons have different lengths based on different wireless station type.

5. The method of claim 2 further including:

a wireless station of one of said types scanning all channels to detect the beacons for that wireless station type; and

upon detecting a beacon of the type for that wireless station on a channel, the wireless station conducting an association process on that channel based on the detected beacon information.

6. The method of claim 1, wherein a common mode waveform is not required for communication of the different types of wireless stations.

7. The method of claim 1, wherein a beacon for one waveform format may be scheduled anywhere in a superframe of another waveform format.

8. The method of claim 1, wherein the structure of each superframe is variable.

9. The method of claim 1, wherein beacons and beacon periods may be located anywhere in a superframe.

10. The method of claim 9, wherein beacon periods comprise variable lengths.

11. The method of claim 9, wherein superframes may overlap based on beacon placement.

12. The method of claim 1, wherein each superframe comprises multiple beacons or beacon periods.

13. The method of claim 1, wherein channel bandwidth sharing is provided for the multiple wireless stations of different types operate at the same wireless frequency band but cannot directly communicate with each other due to the different waveform formats.

14. The method of claim 1, wherein different waveforms have different superframe structures.

15. A method of providing coordination for managing communication of information over one or more wireless channels in a network including multiple wireless stations of different types operating at the same wireless frequency band but at different waveform formats, the method comprising:

allocating channel bandwidth by dividing channel time into one or more superframes, each superframe initiated by a beacon providing schedules for communication of packets of information over one or more channels, wherein each superframe having a structure based on wireless station type, wherein each superframe is bounded by beacons that are different based on station type, said allocating channel bandwidth further including;

scanning all available channels in the frequency band to detect available channels, selecting a channel among the detected channels, when there is sufficient channel time in the selected channel for all the different station types, wherein different types of wireless stations operate at a same wireless frequency band but at different waveform formats; and

then scheduling and transmitting beacon periods for different types of wireless stations for the selected channel, wherein multiple different beacon types may be scheduled anywhere in each superframe such that one or more reserved channel time blocks for each station type may be scheduled in each superframe for serial wireless communication on the selected channel by different station types.

16. The method of claim 15 further comprising:

when there is insufficient channel time in the selected channel for all the different station types, then allocating channel bandwidth further includes scheduling and transmitting one or more types of beacons for different waveform formats to other channels such that different types of stations may operate on different channels based on time division scheduling.

17. The method of claim 16 wherein for serial communication, scheduling beacon periods for different types of wireless stations in the same channel further includes scheduling one or more unreserved channel time blocks or contention access periods in each superframe.

18. The method of claim 16 wherein superframes bounded by beacons have different lengths based on different wireless station type.

19. The method of claim 16 further including:

a wireless station of one of said types scanning all channels to detect the beacons for that wireless station type; and

upon detecting a beacon of the type for that wireless station on a channel, the wireless station conducting an association process on that channel based on the detected beacon information.

20. A wireless communication system for managing communication of information in a network including multiple wireless stations of different types operating at the same wireless frequency band but at different waveform formats, the system comprising:

a coordinator device that manages communication of information by said wireless stations over one or more wireless channels in the network,

including allocating channel bandwidth by dividing channel time into one or more superframes, each superframe initiated by a beacon providing schedules for communication of packets of information over one or more channels,

wherein each superframe having a structure based on wireless station type, wherein each superframe is bounded by beacons that are different based on station type,

the controller including a scheduler that scans all available channels in the frequency band to detected available channels,

wherein when the number of detected available channels is same or greater than the number of wireless station types, then the scheduler scheduling and transmitting beacon periods for the different types of wireless stations to different available channels,

wherein different types of wireless stations operate at a same wireless frequency band but at different waveform formats,

wherein each type of wireless station may have a dedicated available channel period for wireless communication in parallel with other types of wireless stations.

21. The system of claim 20 wherein when the number of detected available channels is smaller than the station types, then for a detected channel the scheduler schedules and transmits beacon periods for different types of wireless stations for the detected channel, wherein multiple different beacon types for different waveform formats may be scheduled anywhere in each superframe such that one or more reserved channel time blocks for each station type may be scheduled in each superframe for serial wireless communication on the detected channel by different station types.

22. The system of claim 21 wherein for serial communication, the scheduler schedules beacon periods for different types of wireless stations in the same channel further includes scheduling one or more unreserved channel time blocks or contention access periods in each superframe.

23. The system of claim 21 wherein superframes bounded by beacons have different lengths based on different wireless station type.

24. The system of claim 21 further including:

a wireless station of one of said types that scans all channels to detect the beacons for that wireless station type, and upon detecting a beacon of the type for that wireless station on a channel, the wireless station conducts an association process on that channel based on the detected beacon information.

25. The system of claim 21 wherein the coordinator includes a Media Access Control (MAC) layer and a physical (PHY), the MAC layer implementing the scheduler for communication via the PHY layer.

26. The system of claim 25, wherein a same PHY is used for communication of different waveforms in the same frequency band.

27. A wireless communication system for managing communication of information in a network including multiple wireless stations of different types operating at the same wireless frequency band but at different waveform formats, the system comprising:

a coordinator device configured for managing communication of information by said wireless stations over one or more wireless channels in the network, including allocating channel bandwidth by dividing channel time into one or more superframes, each superframe initiated by a beacon providing schedules for communication of packets of information over one or more channels,

wherein each superframe having a structure based on wireless station type, wherein each superframe is bounded by beacons that are different based on station type,

the controller including a scheduler that scans all available channels in a the frequency band to detect available channels, when there is sufficient channel time in the selected channel for all the different station types,

wherein different types of wireless stations operate at a same wireless frequency band but at different waveform for,

the scheduler further selects a channel among the detected channels, then schedules and transmits beacon periods for different types of wireless stations for the selected channel,

wherein multiple different beacon types may be scheduled anywhere in each superframe such that one or more reserved channel time blocks for each station type may be scheduled in each superframe for serial wireless communication on the selected channel by different station types.

28. The system of claim 27 wherein when there is insufficient channel time in the selected channel for all the different station types, the scheduler schedules and transmits one or more types of beacons to other channels such that different types of stations may operate on different channels based on time division scheduling, wherein different types of beacons have different waveform formats.

29. The system of claim 28 wherein for serial communication, the scheduler schedules and transmits beacon periods for different types of wireless stations in the same channel further including one or more unreserved channel time blocks or contention access periods in each superframe.

30. The system of claim 28 wherein superframes bounded by beacons have different lengths based on different station type.

31. The system of claim 28 further including:

a wireless station of one of said types scans all channels to detect the beacons for that wireless station type, and upon detecting a beacon of the type for that wireless station on a channel, the wireless station conducts an association process on that channel based on the detected beacon information.