Device in wireless communication system and method

Abstract

A main carrier on a licensed frequency band and a plurality of auxiliary carriers on an unlicensed frequency band exist in a wireless communication system, and a device at a base-station side in the wireless communication system includes: a controller configured to conduct power adjustment according to a result of detecting the usability of the plurality of auxiliary carriers, to enable a predetermined transmission power pre-allocated to one or more unavailable auxiliary carriers to be allocated to an auxiliary carrier to be used in available auxiliary carriers; and a communication unit configured to send a power adjustment result of the control unit to a user equipment, wherein the power adjustment result at least includes information instructing whether the power allocation changes.

1 . (canceled) 
     
     
         2 . A base station comprising circuitry configured to:
 perform an energy detection on a plurality of secondary component carriers to determine which of the plurality of secondary component carriers are available;   perform power adjustment on the plurality of secondary component carriers according to the energy detection;   interact with a neighbor base station via X2 signaling; and   select from the plurality of secondary component carriers, according to a result of the interaction, available secondary component carriers to be used by the base station.   
     
     
         3 . The base station of  claim 2 , wherein the interaction comprises receiving an availability detection result and a power adjustment result from the neighbor base station. 
     
     
         4 . The base station of  claim 2 , wherein the interaction comprises exchanging availability detection results and power adjustment results with the neighbor base station. 
     
     
         5 . The base station of  claim 2 , wherein the circuitry is further configured to activate and/or deactivate the plurality of secondary component carriers according to the result of the interaction. 
     
     
         6 . The base station of  claim 2 , wherein the circuitry is further configured to preferentially select, according to the result of the interaction, a secondary component carrier of the plurality of secondary component carriers with a relatively low transmission power. 
     
     
         7 . The base station of  claim 2 , wherein the circuitry is further configured to preferentially select, according to the result of the interaction, a secondary component carrier of the plurality of secondary component carriers with a high success rate in energy detection. 
     
     
         8 . A method of a base station in a wireless communication network, the method comprising:
 performing an energy detection on a plurality of secondary component carriers to determine which of the plurality of secondary component carriers are available;   performing power adjustment on the plurality of secondary component carriers according to the energy detection;   interacting with a neighbor base station via X2 signaling; and   selecting from the plurality of secondary component carriers, according to a result of the interaction, available secondary component carriers to be used by the base station.   
     
     
         9 . The method of  claim 8 , wherein the interaction comprises receiving an availability detection result and a power adjustment result from the neighbor base station. 
     
     
         10 . The method of  claim 8 , wherein the interaction comprises exchanging availability detection results and power adjustment results with the neighbor base station. 
     
     
         11 . The method of  claim 8 , further comprising activating and/or deactivating the plurality of secondary component carriers according to the result of the interaction. 
     
     
         12 . The method of  claim 8 , further comprising preferentially selecting, according to the result of the interaction, a secondary component carrier of the plurality of secondary component carriers with a relatively low transmission power. 
     
     
         13 . The method of  claim 8 , further comprising preferentially selecting, according to the result of the interaction, a secondary component carrier of the plurality of secondary component carriers with a high success rate in energy detection.