Link adaptation by channel bundling in a wireless communication system

Abstract

The present invention relates to a method of reducing interference in a communication system supporting multiple radio channel communication scheme and wherein a communication link can be established between a transmitter and a receiver. In the method the transmitter first determines ( 301 ) interference level at the transmitter, and then based on the determined interference level, performs link adaptation, wherein the link adaptation comprises applying ( 307 ) channel bundling for adapting the communication link so as to transmit simultaneously on at least two radio channels from the transmitter to the receiver.

1 . A method of reducing interference in a communication system supporting multiple radio channel communication scheme, wherein a communication link is established between a transmitter ( 101 ) and a receiver ( 103 ), the method comprising:
 determining ( 301 ) an interference level at the transmitter; and   based on the determined interference level, performing a link adaptation, wherein the link adaptation comprises applying ( 307 ) a channel bundling for adapting the communication link so as to transmit simultaneously on at least two radio channels from the transmitter ( 101 ) to the receiver ( 103 ).   
   
   
       2 . The method according to  claim 1 , wherein the link adaptation further comprises adjusting ( 311 ) a physical layer mode, wherein the physical layer mode is defined by at least one of a modulation scheme and a coding scheme. 
   
   
       3 . The method according to  claim 2 , wherein the channel bundling is performed before the physical layer mode is adjusted. 
   
   
       4 . The method according to  claim 1 , wherein the transmitter ( 101 ) receives a power control command from the communication system, the method further comprising receiving the power control command from the communication system and, based on the power control command, applying the channel bundling without adjusting a transmission power of the transmitter ( 101 ). 
   
   
       5 . The method according to  claim 1 , wherein the transmitter ( 101 ) receives a power control command from the communication system, the method further comprising receiving the power control command for the communication system and, based on the power control command, applying the channel bundling in conjunction with a power adjustment of the transmitter ( 101 ). 
   
   
       6 . The method according to  claim 1 , wherein after the channel bundling has been applied, the transmission starts simultaneously on multiple radio channels. 
   
   
       7 . The method according to  claim 1 , wherein after the channel bundling has been applied, the transmission starts at different time instants on different radio channels. 
   
   
       8 . A computer program product comprising instructions for implementing the steps of a method according to  claim 1  when loaded and run on computer means of the transmitter ( 101 ). 
   
   
       9 . A communication device ( 101 ) in a communication system supporting multiple radio channel communication scheme, the communication device comprising:
 unit for determining interference level at the communication device ( 101 ); and   link adaptation unit ( 201 ) arranged, based on the determined interference level, to perform a link adaptation for reducing interference in the communication system, wherein the link adaptation comprises applying a channel bundling for transmitting simultaneously on at least two different radio channels.   
   
   
       10 . A computer-readable storage medium having executable instructions for reducing interference in a communication system supporting multiple radio channel communication scheme, wherein a communication link is established between a transmitter and a receiver, when executed, the acts comprising:
 determining an interference level at the transmitter; and   based on the determined interference level, performing a link adaptation, wherein the link adaptation comprises applying a channel bundling for adapting the communication link so as to transmit simultaneously on at least two radio channels from the transmitter to the receiver.