Method of in-device interference mitigation for cellular, bluetooth, WiFi, and satellite systems coexistence

Patent metadata

Field	Value
Publication number	US-9246603-B2
Application number	US-201113136861-A
Country	US
Kind code	B2
Filing date	Aug 11, 2011
Priority date	Aug 12, 2010
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

A coexistence interference mitigation method is provided. In a wireless network, a wireless device is equipped with multiple radios in the same device platform. The wireless device also has a control entity that communicates with the multiple co-located radio modules. A first radio module receives a notification from the control entity. The notification informs a critical signaling status of a second radio module co-located with the first radio module. Upon receiving the notification, the first radio module stops uplink transmission due to coexistence interference and transmits a coexistence indicator to its serving eNB. After a certain period, the first radio module receives a second notification that informs a completion status of the critical signaling of the second radio module. Upon receiving the second notification, the first radio module resumes uplink transmission and transmits a coexistence resume indicator to the eNB.

First claim

What is claimed is:

1. A method comprising:
(a) receiving a notification from a processor by a first transceiver, wherein the processor notifies a critical signaling status of a second transceiver co-located with the first transceiver;
(b) stopping an ongoing uplink transmission with a base station for a period of time by the first transceiver and ignoring uplink transmission opportunity granted to the first transceiver by the base station in response to the notification of the critical signaling status of the second transceiver; and
(c) transmitting a coexistence indicator from the first transceiver to the base station to prevent the base station from sending a false alarm and from triggering additional coexistence interference mitigation functions for the first transceiver during the period of time.

2. The method of claim 1 , wherein the coexistence indicator is transmitted via a radio resource control (RRC) signaling message or a media access control (MAC) control element (CE).

3. The method of claim 1 , further comprising:
receiving a second notification from the control entity, wherein the control entity notifies a completion status of the critical signaling of the second transceiver; and
resuming uplink transmission.

4. The method of claim 3 , further comprising: transmitting a coexistence resume indicator from the first transceiver to the base station.

5. The method of claim 1 , wherein the second transceiver is a Bluetooth module, and wherein the critical signaling is part of an initial connection setup procedure.

6. The method of claim 1 , wherein the second transceiver is a Bluetooth transceiver, and wherein the critical signaling is part of an adaptive frequency hopping (AFH) setup procedure.

7. The method of claim 1 , wherein the second transceiver adjusts a transmit power level based on a frequency distance from a frequency channel of the second transceiver to a frequency channel of the first transceiver.

8. The method of claim 1 , wherein the second transceiver adjusts a transmit power level based on a number of transmission failures.

9. A method comprising:
(a) receiving a coexistence indicator from a wireless device by a base station, wherein the coexistence indicator informs that the wireless device ignores uplink transmission opportunity granted by the base station and stops uplink transmission for a period of time;
(b) configuring uplink measurement functions into abnormal status in response to the coexistence indicator, wherein the base station refrains from sending alarms and triggering additional coexistence interference mitigation functions for the wireless device during the period of time; and
(c) receiving a coexistence resume indicator from the wireless device, wherein the base station configures the uplink measurement functions back to normal status.

10. The method of claim 9 , wherein the uplink measurement functions include hybrid automatic repeat request (HARQ) function, and wherein the base station stops or resets an HARQ retransmission counter in (b).

11. The method of claim 9 , wherein the uplink measurement functions include uplink signal measurement function, and wherein the base station ignores uplink measurement results in (b).

12. The method of claim 9 , wherein the uplink measurement functions include minimization of driving test (MDT) function, and wherein the base station stops logging uplink measurement results for MDT in (b).

13. The method of claim 9 , wherein the coexistence indicator is received via a radio resource control (RRC) signaling message or a media access control (MAC) control element (CE).

14. A wireless device, comprising: a first transceiver; a second transceiver that is co-located with the first transceiver; and a processor that sends a notification to the first transceiver, wherein the notification notifies the first transceiver a critical signaling status of the second transceiver, wherein the first transceiver ignores uplink transmission opportunity granted to the first transceiver by a base station and stops an ongoing uplink transmission with the base station in response to the notification of the critical signaling status of the second transceiver, and wherein the first transceiver transmitting a coexistence indicator to the base station to prevent the base station from sending a false alarm and from triggering additional coexistence interference mitigation functions for the first transceiver during the period of time.

15. The device of claim 14 , wherein the coexistence indicator is transmitted via a radio resource control (RRC) signaling message or a media access control (MAC) control element (CE).

16. The device of claim 14 , wherein the processor sends a second notification to the first transceiver notifying a completion status of the critical signaling of the second transceiver, and wherein the first transceiver resumes uplink transmission in response to the second notification.

17. The device of claim 16 , wherein the first transceiver transmits a coexistence resume indicator to the base station.

18. The device of claim 14 , wherein the second transceiver is a Bluetooth module, and wherein the critical signaling is part of an initial connection setup procedure.

19. The device of claim 14 , wherein the second transceiver is a Bluetooth transceiver, and wherein the critical signaling is part of an adaptive frequency hopping (AFH) signaling procedure.

20. The device of claim 14 , wherein the second transceiver adjusts a transmit power level based on a frequency distance from a frequency channel of the second transceiver to a frequency channel of the first transceiver.

21. The device of claim 14 , wherein the second transceiver adjusts a transmit power level based on a number of transmission failures.

Assignees

• Fu I-Kang
• Plumb Willaim
• Mediatek Inc

Inventors

• Fu I-Kang
• Plumb Willaim

Classifications

• H04B1/1027

  assessing signal quality or detecting noise/interference for the received signal · CPC title

• H04B15/00 Primary

  Suppression or limitation of noise or interference (by means associated with receiver H04B1/10) · CPC title

• H04B1/406

  with more than one transmission mode, e.g. analog and digital modes · CPC title

• H04B1/525

  with means for reducing leakage of transmitter signal into the receiver · CPC title

• H04W52/244

  Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI] · CPC title