Synchronized UWB piconets for SOP (Simultaneously Operating Piconet) performance

• US 20120218980A1
• Filed: 04/26/2012
• Published: 08/30/2012
• Est. Priority Date: 10/24/2003
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Karaoguz, Jeyhan, Ojard, Eric J., Frank, Edward H.
• Granted Patent: US 8,768,253 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04B 1/7183 Synchronisation
• CPC Class Codes: H04J 3/0652 Synchronisation among time division multiple access [TDMA] nodes, e.g. time triggered protocol [TTP] bus network with centralized control in which slots are of a TDMA packet structure H04L12/4035
• CPC Class Codes: H04L 7/0008 Synchronisation information channels, e.g. clock distribution lines
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 92/02 Inter-networking arrangements
• CPC Class Codes: H04W 92/045 between access point and backbone network device

Abstract

Synchronized UWB piconets for SOP (Simultaneously Operating Piconet) performance. A common backbone (either wired or wireless) is employed that provides a common CLK (clock signal) to all of the various PNCs (piconet coordinators) of various piconets that may operate within a sufficiently close region such that interference could undesirably occur. By providing a very reliable CLK signal from a common backbone to all of the PNCs of the various piconets operating within a substantially close proximity to one another, very precise synchronization may be ensured for all of the communications performed therein. The various piconets may then even operate using TDMA (Time Division Multiple Access)—whose performance would be substantially compromised without effective synchronization. In addition, combined TFC (time frequency code) and TDMA may also be employed to support the communications therein thereby providing even another degree of orthogonality that provided by TDMA alone.

Claims

1. A synchronization backbone, comprising:

at least one output to transmit a clock signal to a first wireless network controller of a first wireless network; and

wherein;

the at least one output to transmit the clock signal to a second wireless network controller of a second wireless network; and

based on the clock signal transmitted to each of the first wireless network controller and the second wireless network controller, first communications involving at least one of the first wireless network controller and a first wireless terminal within the first wireless network occur during first time slots and second communications involving at least one of the second wireless network controller and a second wireless terminal within the second wireless network occur during second time slots.

2. The synchronization backbone of claim 1, wherein:

the at least one output including a wireless output; and

the at least one output to transmit the clock signal wirelessly to each of the first wireless network controller and to the second wireless network controller via a wireless connection.

3. The synchronization backbone of claim 1, wherein:

the at least one output including a wired output; and

the at least one output to transmit the clock signal from the synchronization backbone to each of the first wireless network controller and to the second wireless network controller via a wired connection.

4. The synchronization backbone of claim 1, wherein:

the first wireless network is a first piconet;

the first wireless network controller is a first piconet controller (PNC) of the first piconet;

the second wireless network is a second piconet; and

the second wireless network controller is a second PNC of the second piconet.

5. The synchronization backbone of claim 1, wherein:

at least one of the first wireless network controller and the second wireless network controller is operative using WLAN (Wireless Local Area Network) AP (Access Point) functionality.

6. The synchronization backbone of claim 1, wherein:

at least one of the first wireless network controller and the second wireless network controller is operative using both WLAN (Wireless Local Area Network) AP (Access Point) functionality and piconet functionality.

7. The synchronization backbone of claim 1, wherein:

the first communications being supported in accordance with a first TFC (Time Frequency Code); and

the second communications being supported in accordance with a second TFC.

8. The synchronization backbone of claim 1, wherein:

the first time slots being first TDMA (Time Division Multiple Access) time slots; and

the second time slots being second TDMA time slots.

9. The synchronization backbone of claim 1, wherein:

the first wireless network operating within a first region;

the second wireless network operating within a second region; and

the first region and the second region occupying at least a portion of common space.

10. The synchronization backbone of claim 1, wherein:

at least one of the first communications and the second communications operating using the UWB (Ultra Wide Band) signals that occupy a frequency spectrum spanning from approximately 3.1 GHz (Giga-Hertz) to approximately 10.6 GHz; and

the frequency spectrum being partitioned into a plurality of frequency bands each having a bandwidth of approximately 500 MHz (Mega-Hertz).

11. A wireless network controller, comprising:

an input to receive a clock signal transmitted from a synchronization backbone; and

wherein;

based on the clock signal transmitted from the synchronization backbone, the wireless network controller to coordinate communications involving at least one of the wireless network controller and a first wireless terminal within a first wireless network to occur during first time slots such that second communications involving at least one additional wireless network controller, having at least one additional input to receive the clock signal transmitted from the synchronization backbone, and a second wireless terminal within a second wireless network occur during second time slots.

12. The wireless network controller of claim 11, wherein:

the input including a wireless input; and

the wireless input of the wireless network controller to receive the clock signal transmitted wirelessly from the synchronization backbone.

13. The wireless network controller of claim 11, wherein:

the input including a wired input; and

the wired input of the wireless network controller to receive the clock signal transmitted from the synchronization backbone via a wired connection.

14. The wireless network controller of claim 11, wherein:

the first wireless network is a first piconet;

the wireless network controller is a first piconet controller (PNC) of the first piconet;

the second wireless network is a second piconet; and

the at least one additional wireless network controller is a second PNC of the second piconet.

15. The wireless network controller of claim 11, wherein:

at least one of the wireless network controller and the at least one additional wireless network controller is operative using WLAN (Wireless Local Area Network) AP (Access Point) functionality.

16. The wireless network controller of claim 11, wherein:

at least one of the wireless network controller and the at least one additional wireless network controller is operative using both WLAN (Wireless Local Area Network) AP (Access Point) functionality and piconet functionality.

17. A piconet controller (PNC), comprising:

an input to receive a clock signal transmitted from a synchronization backbone; and

wherein;

the PNC within a first piconet operative within a first region having at least a portion of common space with a second region in which at least one additional PNC within a second piconet is operative; and

based on the clock signal transmitted from the synchronization backbone, the first PNC to coordinate first communications involving at least one of the PNC and a first wireless terminal within a first wireless network to occur during first time TDMA (Time Division Multiple Access) slots such that second communications involving the at least one additional PNC, having at least one additional input to receive the clock signal transmitted from the synchronization backbone, and a second wireless terminal within a second wireless network occur during second TDMA time slots.

18. The PNC of claim 17, wherein:

the input including a wireless input; and

the wireless input of the PNC to receive the clock signal transmitted wirelessly from the synchronization backbone.

19. The PNC of claim 17, wherein:

the input including a wired input; and

the wired input of the wireless network controller to receive the clock signal transmitted from the synchronization backbone via a wired connection.

20. The PNC of claim 17, wherein:

at least one of the PNC and the at least one additional PNC is operative using both WLAN (Wireless Local Area Network) AP (Access Point) functionality.