Patent ID: 8189519

Claim:
A channel assignment apparatus configured to assign a plurality of logical channels to a radio physical channel between a radio access network and a terminal, wherein the logical channels include a logical channel for control and a logical channel for data transmission, wherein the radio physical channel is commonly used for a plurality of logical channels, wherein each logical channel has a correspondence relationship with one radio physical channel, and wherein the radio physical channel includes a particular time position at which a particular type of logical channel is placed and other time positions for placing logical channels other than the particular type of logical channel, the channel assignment apparatus comprising: a traffic monitoring detection unit configured to detect occurrence of traffic of the logical channels; a logical channel type determination unit configured to determine types of the logical channels; and a logical channel assignment unit configured to assign radio resources on the radio physical channel to the logical channels, wherein the logical channel assignment unit, if traffic occurs in a specific logical channel other than the particular type of logical channel, assigns the specific logical channel other than the particular type of logical channel to the particular time position on the radio physical channel when there is no traffic of the particular type of logical channel at a transmission timing corresponding to the particular time position and assigns, after the specific logical channel other than the particular type of logical channel is assigned to the particular time position, the specific logical channel other than the particular type of logical channel to a time position other than the particular time position at a transmission timing corresponding to the time position other than the particular time position, wherein the logical channel assignment unit, if traffic occurs in the particular type of logical channel other than the specific logical channel, assigns the particular type of logical channel other than the specific logical channel to the particular time position on the radio physical channel, wherein, after the particular type of logical channel other than the specific logical channel is assigned to the particular time position on the radio physical channel, when the radio physical channel is frequency-divided or code-divided, the logical channel assignment unit assigns the specific logical channel other than the particular type of logical channel to the particular time position, that is already assigned to the particular type of logical channel, on the radio physical channel defined by different frequency or code by frequency-multiplexing or code-multiplexing according to occurrence of traffic on the specific logical channel other than the particular type of logical channel.