Wireless communication method, wireless communication system, base station, and wireless terminal

• US 9,648,508 B2
• Filed: 01/12/2015
• Issued: 05/09/2017
• Est. Priority Date: 07/20/2012
• Status: Active Grant

• Current Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Original Assignee: Fujitsu Limited
• Inventors: Ohta, Yoshiaki, Kawasaki, Yoshihiro
• Primary Examiner(s): Clawson, Stephen J
• Application Number:
  US14/594,549
• Publication Number:
  US 20150124639A1
• Time in Patent Office: 848 Days
• Field of Search: 370252
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless communication method includes: transmitting, by a wireless terminal executing a plurality of wireless communications, first assistance information for assisting in control of interference to a base station, according to occurrence of the interference in the wireless terminal; receiving, by the base station, the first assistance information from the wireless terminal and transmitting control information relating to the plurality of wireless communications to the wireless terminal; and performing, by the wireless terminal, measurement for the control of the interference and transmitting second assistance information for assisting in the control of the interference.

Claims

1. A wireless communication method comprising:

transmitting, by a wireless terminal executing wireless communications of a plurality of different types of wireless signals including a first type of wireless signal and a second type of wireless signal, first information including an indication whether the first type of wireless signal is interfered with, whether the second type of wireless signal is interfered with, or whether both the first and second type of wireless signals are interfered with;

receiving, from a base station, control information relating to an operation to be taken by the wireless terminal mitigating interference detected, the control information being based on the first information; and

performing the operation, by the wireless terminal, in response to the received control information to mitigate the interference detected.

2. The wireless communication method according to claim 1, wherein

the wireless terminal makes measurements which are used by the wireless terminal to determine a magnitude of any in-device interference, the first information being based at least in part on the measurements;

and

the first information is transmitted before completing the measurements.

3. The wireless communication method according to claim 1, wherein the first information further includes information indicating a preference of the wireless terminal regarding the plurality of different types of wireless signals.

4. The wireless communication method according to claim 1, further comprising:

performing, by the wireless terminal after receipt of the control information, further measurements which are used by the wireless terminal to determine a magnitude of any continuing in-device interference;

transmitting by the wireless terminal, second information which is a function of the further measurements relating to the wireless communications of the wireless terminal.

5. The wireless communication method according to claim 1, further comprising:

performing, by the wireless terminal after receipt of the control information, further measurements which are used by the wireless terminal to determine a magnitude of any continuing in-device interference;

wherein, when prescribed conditions are satisfied by the wireless terminal, second information which is a function of the further measurements is not transmitted.

6. The wireless communication method according to claim 1, further comprising:

determining, by the wireless terminal, that in-device interference occurs based on degradation of communication performance of at least one type of wireless signal of the plurality of different types wireless signals.

7. The wireless communication method according to claim 1 wherein

the first information includes at least one of the group consisting of:

(i) information indicating a preferred type of wireless signal, (ii) information associating the preferred type of wireless signal and an occurrence pattern of the interference, and (iii) information associating preferred type of wireless signal, the occurrence pattern of the interference, and a type of communication being performed by the wireless terminal.

8. The wireless communication method according to claim 1, further comprising:

receiving by the wireless terminal from the base station, at least one of the group consisting of;

(i) a cycle of scheduling of wireless resources to be used by the wireless terminal, (ii) a cycle of intermittent communication to be performed by the wireless terminal, (iii) frequency of autonomous denial to be performed by the wireless terminal, and (iv) notification to perform a handover by changing a frequency band used by the wireless terminal to a different frequency band for at least the one of the plurality of types of wireless signals of the type employed for the control information.

9. A wireless communication system comprising:

a wireless terminal configured to;

engage in a plurality of wireless signal types, and

transmit first assistance information, for use in control of interference, to a base station using a first type of wireless signal when interference between the first type of wireless signal and a second type of wireless signal is detected at the wireless terminal, the first assistance information including an indication whether the first type of wireless signal is interfered with, whether the second type of wireless signal is interfered with, or whether both the first and second type of wireless signals are interfered with, and perform measurements relating to detection of interference; and

a base station configured to

receive the first assistance information and transmit control information relating to an interference control operation to be executed by the wireless terminal regarding the plurality of wireless signals.

10. The wireless communication system of claim 9, wherein the plurality of wireless signal types includes at least two from the group consisting of:

(i) a Long Term Evolution (LTE) type, (ii) a wireless local area network type, (iii) a Wi-Fi type, and (iv) an industrial, scientific and medical (ISM) radio type.

11. A base station comprising:

a receiver configured to receive from a wireless terminal first assistance information transmitted when there occurs in-device coexistence interference at the wireless terminal executing a plurality of wireless signal types, the first assistance information including an indication whether a first type of wireless signal is interfered with, whether a second type of wireless signal is interfered with, or whether both the first and second type of wireless signals are interfered with, where the first assistance information is transmitted by the wireless terminal after performing measurements related to the in-device coexistence interference; and

a controller coupled with a transmitter and configured, responsive to the received first assistance information, to transmit to the wireless terminal control information relating to an interference control operation to be undertaken by wireless terminal regarding the plurality of wireless signal.

12. The base station of claim 11, wherein the plurality of wireless signal types includes at least two from the group consisting of:

(i) a Long Term Evolution (LTE) type, (ii) a wireless local area network type, (iii) a Wi-Fi type, and (iv) an industrial, scientific and medical (ISM) radio type.

13. A wireless terminal comprising:

a controller configured

to cause the wireless terminal engaged in a plurality of wireless signal types to develop first assistance information for transmission to a base station when in-device co-existence (IDC) interference is detected at the wireless terminal the first assistance information including an indication whether a first type of wireless signal is interfered with, whether a second type of wireless signal is interfered with, or whether both the first and second type of wireless signals are interfered with, and

to obtain measurement information related to the IDC interference;

a transmitter configured to transmit to a base station the first assistance information, and

a receiver configured to receive control information from the base station, the control information relating to an interference control operation to be executed by the wireless terminal to mitigate the interference.

14. The wireless terminal of claim 13, wherein the control information indicates at least one action to be taken with regard to the plurality of wireless signal types, the action being directed toward mitigating the IDC interference.

15. The wireless terminal of claim 13, wherein the second assistance information is based upon the measurement information.

16. The wireless terminal of claim 13, wherein the plurality of wireless signal types includes at least two from the group consisting of:

(i) a Long Term Evolution (LTE) type, (ii) a wireless local area network type, (iii) a Wi-Fi type, and (iv) an industrial, scientific and medical (ISM) radio type.

17. The wireless terminal of claim 13, wherein the controller is further configured to determine that in-device interference occurs based on degradation of communication performance of at least one of the plurality of wireless signal types.

18. The wireless terminal of claim 13, wherein the control information received from the base station contains information indicating a selection for one of the wireless signal types of one of the group consisting of:

a time division multiplexing (TDM) interference reduction arrangement and a frequency division multiplexing (FDM) interference reduction arrangement.

19. The wireless terminal of claim 13, wherein control information received from the base station further contains information indicating interference reduction is achievable by modifying a discontinuous reception (DRX) configuration employed by the wireless terminal for one of the wireless signal types.

20. The wireless terminal of claim 13, wherein one type of the plurality of signal types is a Long Term Evolution (LTE) type of wireless communication and the first assistance information and the second assistance information are transmitted as radio resource control (RRC) signals.

21. A user equipment (UE), comprising:

a housing; and

an integrated circuit within the housing that is configured

to detect interference between a wireless signal of a first wireless signal type that is transmitted from the UE via an antenna and a wireless signal of a second wireless signal type that is transmitted from the UE,

to transmit to a base station information indicating the interference, the information including an indication whether the first type of wireless signal is interfered with, whether the second type of wireless signal is interfered with, or whether both the first and second type of wireless signals are interfered with, and

to execute an interference control operation for mitigating the interference in accordance with interference control information received from the base station.