Base station device, mobile station device, control information transmission method, control information reception method and program
In a radio system which allocates resources using as units resource blocks which are formed by frequency components and time components, control information for mobile station devices, and identification information which is used to identify a format for a control information transmission channel which transmits the control information is transmitted from the base station device to the mobile station devices by means of the control information transmission channel.
1. A control information reception method, comprising:
receiving, by a mobile station device from a base station device, indication information indicating a field in which control information to be used by the mobile station device is placed within a control information transmission channel;
receiving, by the mobile station device from the base station device, the control information through the control information transmission channel;
performing, by the mobile station device, cyclic redundancy check (CRC) on the control information transmission channel to obtain a CRC bit string including identification information identifying formats which relate to an arrangement of the plurality of items within the control information transmission channel; and
acquiring, by the mobile station device, the control information according to the indication information and the identification information.
2. The method according to claim 1 , wherein the control information includes at least one of: downlink control information including a position of a physical resource block (PRB) where data addressed to the mobile station device is placed, modulation scheme, data length, or information required for hybrid automatic repeat request (HARQ).
3. The method according to claim 1 , wherein the control information comprises power control information.
4. A mobile station device, comprising:
a processor; and
a non-transitory computer readable storage medium storing programming for execution by the processor that, when executed, cause the mobile station device to:
receive, from a base station device, indication information indicating a field in which control information to be used by the mobile station device is placed within a control information transmission channel;
receive, from the base station device, the control information through the control information transmission channel;
perform cyclic redundancy check (CRC) on the control information transmission channel to obtain a CRC bit string including identification information identifying formats which relate to an arrangement of the plurality of items within the control information transmission channel; and
acquire the control information according to the indication information and the identification information.
5. The mobile station device according to claim 4 , wherein the control information includes at least one of: downlink control information including a position of a physical resource block (PRB) where data addressed to the mobile station device is placed, modulation scheme, data length, or information required for hybrid automatic repeat request (HARQ).
6. The mobile station device according to claim 4 , wherein the control information comprises power control information.
7. A non-transitory computer-readable medium storing computer instructions, that when executed by one or more processors, cause the one or more processors to perform the steps of:
receiving, from a base station device, indication information indicating a field in which control information to be used by the mobile station device is placed within a control information transmission channel;
receiving, from the base station device, the control information through the control information transmission channel;
performing cyclic redundancy check (CRC) on the control information transmission channel to obtain a CRC bit string including identification information identifying formats which relate to an arrangement of the plurality of items within the control information transmission channel; and
acquiring the control information according to the indication information and the identification information.
8. The computer-readable medium of claim 7 , wherein the control information includes at least one of: downlink control information including a position of a physical resource block (PRB) where data addressed to the mobile station device is placed, modulation scheme, data length, or information required for hybrid automatic repeat request (HARQ).
9. The computer-readable medium of claim 7 , wherein the control information comprises power control information.