Base station apparatus, user equipment, and communication control method

Abstract

A base station apparatus capable of communicating with a user equipment terminal using a downlink shared channel is disclosed. The base station apparatus includes a radio resource allocation unit allocating radio resource blocks to the shared channel after allocating the radio resource blocks to at least one of a synchronization signal, a common control channel, a broadcast channel, a paging channel, an MBMS channel, and a random access response channel.

1 .- 9 . (canceled) 
     
     
         10 . A base station apparatus capable of communicating with a user equipment terminal using a shared channel in downlink, the base station apparatus comprising:
 a storage unit configured to associate and store radio resources usable for transmitting the shared channel and downlink radio quality information with a transmission method to be used in the transmission of the shared channel;   a determination unit configured to determine the transmission method to be used in transmission of the shared channel by referring to the storage unit and based on downlink radio quality information reported from the user equipment terminal and radio resources usable for the shared channel; and   a transmission unit configured to transmit the shared channel using the determined transmission method.   
     
     
         11 . The base station apparatus according to  claim 10 , wherein
 the storage unit stores a size of data used in the transmission of the shared channel as the transmission method and   when frequency resources usable for the transmission of the downlink radio quality information and the shared channel are fixed, the size of the data satisfies a predetermined error rate and becomes a maximum value.   
     
     
         12 . The base station apparatus according to  claim 10 , wherein
 the storage unit stores a size of data used in the transmission of the shared channel, a modulation scheme used in the transmission of the shared channel, and an amount of frequency resources used in the transmission of the shared channel as the transmission method.   
     
     
         13 . The base station apparatus according to  claim 10 , wherein
 when an amount of data to be transmitted or a maximum amount of data receivable by the user equipment terminal is equal to or less than a data size determined as the transmission method, the determination unit reduces an amount of frequency resources determined as the transmission method.   
     
     
         14 .- 19 . (canceled) 
     
     
         20 . A communication control method to be used in a base station apparatus capable of communicating with a user equipment terminal using a downlink shared channel, the communication control method comprising:
 a storage step of associating and storing radio resources usable for transmitting the shared channel and downlink radio quality information with a transmission method used in the transmission of the shared channel;   a determination step of determining a transmission method to be used in the transmission of the shared channel by referring data stored in the storage step and based on downlink radio quality information reported from the user equipment terminal and radio resources usable for the shared channel; and   a transmission step of transmitting the shared channel using the determined transmission method.