Method and apparatus for detecting interference in radio carrier band

Abstract

Embodiments of the present disclosure provide methods and apparatus for detecting interference in radio carrier band. A method performed at a network node may comprise: receiving, from a terminal device, a first report about channel state of a first frequency range, and a second report about channel state of a second frequency range; and determining whether the terminal device is interfered in any of the first frequency range or the second frequency range, based on a comparison between the channel state of the first frequency range and the channel state of the second frequency range. According to embodiments of the present disclosure, the deterioration of channel state in a frequency range caused by interference may be shown and recognized via the comparison result.

1 . A method performed at a network node, comprising:
 receiving, from a terminal device, a first report about channel state of a first frequency range, and a second report about channel state of a second frequency range; and   determining whether the terminal device is interfered in any of the first frequency range or the second frequency range, based on a comparison between the channel state of the first frequency range and the channel state of the second frequency range.   
     
     
         2 . The method according to  claim 1 ,
 wherein whether the terminal device is interfered is determined based on a first channel quality indicator, CQI, a first rank indication, RI, in the first report, and a second CQI, a second RI in the second report.   
     
     
         3 . The method according to  claim 2 , wherein determining whether the terminal device is interfered comprises:
 mapping the first CQI, the second CQI to a first information carrying capacity, ICC, a second ICC, respectively;   weighting the first ICC, the second ICC, based on the first RI, the second RI, respectively;   comparing a weighted value of first ICC, and a weighted value of the second ICC;   determining the terminal device is interfered, if a difference between the weighted value of the first ICC and the weighted value of the second ICC is bigger than a threshold; and   determining the terminal device is not interfered, if the difference between the weighted value of the first ICC and the weighted value of the second ICC is less than or equal to the threshold.   
     
     
         4 . The method according to  claim 3 ,
 wherein the first CQI, the second CQI are mapped to the first ICC, the second ICC, based on a modulation manner.   
     
     
         5 . The method according to  claim 1 ,
 wherein the first frequency range is for a first communication technology or a second communication technology; and   wherein at least a part of the second frequency range is for both the first communication technology and the second communication technology.   
     
     
         6 . The method according to  claim 5 , wherein the first communication technology is of fifth generation, 5G, and the second communication technology is of fourth generation, 4G. 
     
     
         7 . The method according to  claim 5 , further comprising:
 scheduling the terminal device to the first frequency range, if it is determined that the terminal device is interfered.   
     
     
         8 . The method according to  claim 5 ,
 wherein the first frequency range is included in the second frequency range.   
     
     
         9 . The method according to  claim 1 , wherein a reference signal is transmitted in the first frequency range and/or the second frequency range. 
     
     
         10 . The method according to  claim 9 , wherein the reference signal comprises a channel state information reference signal, CSI-RS. 
     
     
         11 . The method according to  claim 1 , further comprising:
 determining a need to trigger a predetermined event associated with the terminal device;   determining whether a configuration about the predetermined event has been received by the terminal device; and   transmitting, to the terminal device, an indicator for the configuration, in response to that the configuration has been received by the terminal device.   
     
     
         12 . The method according to  claim 11 , wherein the predetermined event comprises:
 transmitting a report about channel state of a frequency range, from the terminal device to the network node; and/or   changing a radio frequency used by the terminal device to the frequency range.   
     
     
         13 . The method according to  claim 11 , wherein the indicator is included in a field of downlink control information, DCI. 
     
     
         14 . The method according to  claim 13 , wherein the indicator comprises a non-zero codepoint of a channel state information, CSI, request field. 
     
     
         15 . The method according to  claim 11 , further comprising:
 determining a capability of the terminal device for storing configuration about the predetermined event; and   transmitting, to the terminal device, the configuration about the predetermined event according to the capability of the terminal device, via radio resource control, RRC, reconfiguration.   
     
     
         16 . The method according to  claim 1 , wherein the network node comprises a base station. 
     
     
         17 . A method performed at a terminal device, comprising:
 transmitting, to a network node, a first report about channel state of a first frequency range, and a second report about channel state of a second frequency range;   wherein the network node determines whether the terminal device is interfered in any of the first frequency range or the second frequency range, based on a comparison between the channel state of the first frequency range and the channel state of the second frequency range.   
     
     
         18 . The method according to  claim 17 ,
 wherein whether the terminal device is interfered is determined based on a first channel quality indicator, CQI, a first rank indication, RI, in the first report, and a second CQI, a second RI in the second report.   
     
     
         19 . The method according to  claim 18 ,
 wherein the network node maps the first CQI, the second CQI to a first ICC, a second ICC, respectively;   wherein the network node weights the first ICC, the second ICC, based on the first RI, the second RI, respectively;   wherein the network node compares a weighted value of first ICC, and a weighted value of the second ICC;   wherein the network node determines the terminal device is interfered, if a difference between the weighted value of the first ICC and the weighted value of the second ICC is bigger than a threshold; and   wherein the network node determines the terminal device is not interfered, if the difference between the weighted value of the first ICC and the weighted value of the second ICC is less than or equal to the threshold.   
     
     
         20 . The method according to  claim 19 ,
 wherein the first CQI, the second CQI are mapped to the first ICC, the second ICC, based on a modulation manner.   
     
     
         21 . The method according to  claim 17 ,
 wherein the first frequency range is for a first communication technology or a second communication technology; and   wherein at least a part of the second frequency range is for both the first communication technology and the second communication technology.   
     
     
         22 . The method according to  claim 21 , wherein the first communication technology is of fifth generation, 5G, and the second communication technology is of fourth generation, 4G. 
     
     
         23 . The method according to  claim 21 ,
 wherein the terminal device is scheduled to the first frequency range, if it is determined that the terminal device is interfered.   
     
     
         24 . The method according to  claim 21 ,
 wherein the first frequency range is included in the second frequency range.   
     
     
         25 . The method according to  claim 17 , wherein a reference signal is transmitted in the first frequency range and/or the second frequency range. 
     
     
         26 - 37 . (canceled)