System and methods for enhancing coexistence efficiency for multi-radio terminals

• US 20110097998A1
• Filed: 10/22/2010
• Published: 04/28/2011
• Est. Priority Date: 10/26/2009
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Fu, I-Kang, Ko, Li-Chun, Hsu, Hong-Kai, Lee, Chi-Chen
• Granted Patent: US 8,626,067 B2
• Time in Patent Office: Days
• US Class Current: 455/41.2
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of scheduling transmitting and receiving communication slots for co-located radio devices is provided. A Bluetooth (BT) device first synchronizes its communication time slots with a co-located radio module, and then obtains the traffic pattern of the co-located radio module. Based on the traffic pattern, the BT device selectively skips one or more TX or RX time slots to avoid data transmission or reception in certain time slots and thereby reducing interference with the co-located radio module. In addition, the BT device generates a co-located coexistence (CLC) bitmap and transmits the CLC bitmap to its peer BT device such that the peer BT device can also skip data transmission or reception in certain time slots affected by the co-located radio module. The skipped time slots are disabled for TX or RX operation to prevent interference and to achieve more energy saving.

Claims

1. A method comprising:

obtaining traffic pattern information of a first plurality of communication slots of a first radio module;

scheduling a second plurality of communication slots for transmitting (TX) or receiving (RX) operation of a second radio module, wherein the second plurality of communication slots is aligned with the first plurality of communication slots, and wherein the second radio module and the first radio module are co-located within a wireless communication device;

selectively skipping one or more communication slots from the second plurality of communication slots based at least in part on the traffic pattern information, wherein the skipped slots are disabled for TX or RX operation.

2. The method of claim 1, wherein a transmit slot is skipped when an acknowledgement is estimated not to be received successfully in a corresponding receive slot due to interference from the first radio module.

3. The method of claim 1, wherein a transmit slot is skipped when data transmission performed in the transmit slot is estimated to interfere with data reception of the first radio module.

4. The method of claim 1, wherein a receive slot is skipped when data reception performed in the receive slot is estimated to be interfered by data transmission of the first radio module.

5. The method of claim 1, further comprising:

determining Co-located Coexistence (CLC) information based at least in part on the traffic pattern information by the second radio module; and

transmitting the CLC information to a peer radio module by the second radio module.

6. The method of claim 5, wherein one or more communication time slots is skipped to prevent from scheduling deadlock between the second radio module and the peer radio module.

7. The method of claim 5, wherein a transmit slot of the peer radio device is skipped when data transmitted in the transmit slot is estimated not to be received successfully by the second radio module due to interference from the first radio module.

8. The method of claim 5, wherein a receive slot of the peer radio device is skipped when the second radio module is estimated not to transmit any data in a corresponding transmit slot.

9. A wireless communication device, comprising:

a first radio module comprising a first radio frequency (RF) transceiver that schedules a first plurality of communication slots for transmitting (TX) or receiving (RX) operation; and

a co-located second radio module, comprising;

a second RF transceiver that schedules a second plurality of communication slots for TX or RX operation, wherein the second plurality of slots is aligned with the first plurality of communication slots; and

a driver control block that selectively skips one or more communication slots based at least in part on traffic pattern information of the first plurality of communication slots.

10. The wireless communication device of claim 9, wherein the wireless communication device is a Multi-Radio Terminal (MRT), wherein the first radio module is a Mobile Wireless Systems (MWS) radio module, and wherein the second radio module is a Bluetooth (BT) radio module.

11. The wireless communication device of claim 9, wherein the one or more communication slots of the second radio module are skipped to avoid interference between the first radio module and the second radio module.

12. The wireless communication device of claim 9, wherein the driver control block determines Co-located Coexistence (CLC) information based at least in part on the traffic pattern information, and wherein the second radio module transmits the CLC information to a peer radio module.

13. The wireless communication device of claim 12, wherein the one or more communication slots of the BT radio module is skipped to avoid scheduling deadlock between the BT radio module and the peer radio module.

14. The wireless communication device of claim 12, wherein the CLC information is represented by a CLC bitmap, each bit indicating whether an operation of a communication slot of the second radio module will be affected due to interference between the first radio module and the second radio module.

15. The wireless communication device of claim 12, wherein one or more communication slots of the peer radio module is selectively skipped based on the CLC information.

16. A method comprising:

obtaining traffic characteristics of a first radio module by a Bluetooth (BT) radio module, wherein the first radio module and the BT radio module are co-located within a Multi-Radio Terminal (MRT);

determining Co-located Coexistence (CLC) information based at least in part on the traffic characteristics, wherein the CLC information indicates whether one or more communication slots of the BT radio module can be used for BT transmitting or receiving operation; and

transmitting the CLC information to a peer BT radio module.

17. The method of claim 16, wherein the first radio module is a mobile wireless system (MWS) module, and wherein the CLC information indicates whether the BT radio module and the MWS radio module is estimated to interfere with each other in one or more communication slots.

18. The method of claim 17, wherein the BT radio module selectively skips one or more communication slots based on the CLC information.

19. The method of claim 17, wherein one or more communication slots of the peer BT radio module is selectively skipped based on the CLC information.

20. The method of claim 17, wherein the CLC information is represented by a CLC bitmap, each bit indicating whether an operation of the BT radio module and the MWS radio module will interfere with each other in a corresponding communication slot.

21. The method of claim 20, wherein the CLC bitmap is a transmit (TX) CLC bitmap, each bit indicating whether data transmission of the BT radio module will interfere with data reception of the MWS radio module in a corresponding communication slot.

22. The method of claim 20, wherein the CLC bitmap is a receive (RX) CLC bitmap, each bit indicating whether data reception of the BT radio module will be interfered by data transmission of the MWS radio module in a corresponding communication slot.

23. The method of claim 16, wherein the first radio module is an IEEE802.11-compatible radio module, and wherein the BT radio module receives a request to generating the CLC information.

24. The method of claim 23, wherein the CLC information indicates pre-defined communication slots reserved by the BT radio module.

25. The method of claim 24, wherein the CLC information is transmitted to the first radio module such that the first radio module enters power-saving mode during the reserved communication slots.

26. The method of claim 24, wherein a countdown time is transmitted to the first radio module such that the first radio module enters power-saving mode during the reserved communication slots.

27. An apparatus, comprising:

a radio frequency (RF) transceiver that schedules a first plurality of communication slots for transmitting (TX) or receiving (RX) operation, wherein the first plurality of slots is aligned with a second plurality of communication slots of a co-located radio module; and

a driver control block that selectively skips one or more communication slots based at least in part on traffic pattern information of the co-located radio module, and wherein TX or RX operation is disabled for the skipped communication slots.

28. The apparatus of claim 27, wherein the one or more communication slots are skipped to avoid interference with the co-located radio module.

29. The apparatus of claim 27, wherein the driver control block determines Co-located Coexistence (CLC) information based at least in part on the traffic pattern information, wherein the CLC information indicates whether the first plurality of communication slots can be used for TX or RX operation.