Wireless communication method, wireless base station and wireless communication terminal

Abstract

To reduce power consumption of a mobile station, this invention provides a wireless communication method for communicating between a base station and a plurality of terminals using a plurality of channels, the channels being slots obtained by dividing frequency-divided carriers by time, in which the base station allocates a set of the channels which is composed of a plurality of neighboring carriers and/or a plurality of successive slots for the each terminal, and the base station allocates at least one of the channels included in the channel sets for packet transmission the terminals.

1 . A wireless communication method for communicating between a base station and a plurality of terminals using a plurality of channels, the channels being slots obtained by dividing frequency-divided carriers by time, characterized in that 
 the base station allocates a set of the channels which is composed of a plurality of neighboring carriers and/or a plurality of successive slots for the each terminal; and    the base station allocates at least one of the channels included in the channel sets for packet transmission to the terminals.    
     
     
         2 . The wireless communication method according to  claim 1 , wherein the base station allocates the channels for the packet transmission to the terminals by using results of channel state estimation received from the terminals.  
     
     
         3 . The wireless communication method according to  claim 1 , wherein the base station sends notification of the channel sets to the terminals.  
     
     
         4 . The wireless communication method according to  claim 3 , wherein each of the terminal receives the notification of the channel set and determines which channels to monitor according to the channel set notified.  
     
     
         5 . The wireless communication method according to  claim 1 , wherein the base station receives receiving abilities of the terminals and allocates the channel sets to satisfy the receiving abilities.  
     
     
         6 . The wireless communication method according to  claim 1 , wherein the base station calculates deviations of the channels and re-allocates the channel sets when the deviations are larger than a predetermined value.  
     
     
         7 . The wireless communication method according to  claim 1 , wherein the base station receives receiving abilities of the terminals from a base station controller that stores the receiving abilities of the terminals.  
     
     
         8 . A wireless base station for communicating between a base station and a plurality of terminals using a plurality of channels, the channels being slots obtained by dividing frequency-divided carriers by ime, characterized in that 
 the wireless base station comprising:    an information storage which stores information to be transmitted to the terminals;    a scheduler which determines a destination terminals of the information;    a modulator which modulates signal according to the information to be transmitted;    a transmitter which transmits the modulated signal; and    a channel condition control unit which obtains receiving abilities of the terminals,    wherein a channel condition module allocates channel sets each composed of a plurality of neighboring carriers and/or a plurality of successive slots to satisfy the receiving abilities, and stores the allocated channel sets.    
     
     
         9 . The wireless base station according to  claim 8 , further comprising a receiver which receives signals from the terminals, wherein the wireless base station obtains the receiving abilities from received signals sent from the terminals.  
     
     
         10 . The wireless base station according to  claim 8 , further comprising a receiver which receives signals from the terminals, wherein the wireless base station obtains the receiving abilities of the terminals from a base station controller that stores the receiving abilities of the terminals.  
     
     
         11 . The wireless base station according to  claim 8 , wherein the scheduler allocates the channels included in the channel sets for packet transmission to the terminals.  
     
     
         12 . The wireless base station according to  claim 8 , further comprising a control signal generator that generates a signal for notifying the terminals of the channel sets.  
     
     
         13 . A wireless communication terminal for communicating between a base station and a plurality of terminals using a plurality of channels, the channels comprising slots obtained by dividing frequency-divided carriers by time, 
 the wireless communication terminal comprising:    a receiver including a filter that extracts a signal of particular frequencies from a signal received at an antenna and an A/D converter that converts the signal to a digital signal;    a baseband unit which separates the signal into frequency portions and demodulates the signal; and    a controller that controls an operation of the entirety of the wireless communication terminal,    wherein the receiver receives, from the base station, an allocated channel set composed of a plurality of neighboring carriers and/or a plurality of successive slots and notifies the controller of the received channel set, and    wherein the controller which changes, according to the channel set, at least one of a frequency range and a center frequency of the filter.    
     
     
         14 . The wireless communication terminal according to  claim 13 , further comprising a transmitter which modulates according to information to be transmitted to the base station and transmits the signal, 
 wherein the controller generates notification of an ability control signal including a receiving ability, and    wherein the transmitter transmits the ability control signal to the base station.    
     
     
         15 . The wireless communication terminal according to  claim 13 , wherein the controller controls the receiver to operates in channels included in the channel set and to be idle in channels not included in the channel set.