RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, BASE STATION DEVICE, AND TERMINAL DEVICE
A base station apparatus performs a radio communication with a terminal apparatus using a spatial division multiplex access method in a downlink. The base station apparatus includes a simultaneous connection information generation section that generates a simultaneous connection information data sequence, which includes a pilot sequence number concerning a number of a pilot signal assigned to another terminal apparatus. The base station apparatus also includes a multiplexing section that multiplexes a signal of the generated simultaneous connection information data sequence with a dedicated data signal which indicates data to be transmitted to the terminal apparatus. The base station apparatus further includes a transmission section that transmits, to the terminal apparatus, the multiplexed signal which includes the simultaneous connection information data sequence, and transmits, to the terminal apparatus, a unique pilot signal which is different from the aforementioned pilot signal assigned to the another terminal apparatus.
1 . A base station apparatus that performs a radio communication with a terminal apparatus using a spatial division multiplex access method in a downlink, the base station apparatus comprising:
a simultaneous connection information generation section that generates a simultaneous connection information data sequence, the simultaneous connection information data sequence including a pilot sequence number concerning a number of a pilot signal assigned to another terminal apparatus;
a multiplexing section that multiplexes a signal of the generated simultaneous connection information data sequence with a dedicated data signal which indicates data to be transmitted to the terminal apparatus; and
a transmission section that transmits, to the terminal apparatus, the multiplexed signal which includes the simultaneous connection information data sequence, and transmits, to the terminal apparatus, a unique pilot signal which is different from said pilot signal assigned to said another terminal apparatus.
2 . The base station apparatus according to claim 1 , wherein the unique pilot signal includes a pilot signal used for calculation of an interference component.
3 . The base station apparatus according to claim 1 , wherein the unique pilot signal includes a pilot signal used for channel estimation.
4 . The base station apparatus according to claim 1 , wherein the simultaneous connection information data sequence includes information concerning a modulation scheme.
5 . The base station apparatus according to claim 1 , wherein
the simultaneous connection information data sequence includes information concerning a data signal assigned to said another terminal apparatus, and the data signal assigned to said another terminal apparatus is a data signal with which the dedicated data signal is multiplexed.
6 . A terminal apparatus that performs a radio communication with a base station apparatus using a spatial division multiplex access method in a downlink, the terminal apparatus comprising:
a simultaneous connection information reception section that receives, from the base station apparatus, a multiplexed signal which includes a simultaneous connection information data sequence, and receives, from the base station apparatus, a unique pilot signal which is different from a pilot signal assigned to another terminal apparatus, wherein
the simultaneous connection information data sequence includes a pilot sequence number concerning a number of said pilot signal assigned to said another terminal apparatus.
7 . The terminal apparatus according to claim 6 , wherein the unique pilot signal includes a pilot signal used for calculation of an interference component.
8 . The terminal apparatus according to claim 6 , further comprising:
a channel estimation section that performs channel estimation using a pilot signal assigned to the terminal apparatus which is included in the unique pilot signal.
9 . The terminal apparatus according to claim 6 , wherein the simultaneous connection information data sequence includes information concerning a modulation scheme.
10 . The terminal apparatus according to claim 6 , wherein the simultaneous connection information data sequence includes information concerning a data signal assigned to said another terminal apparatus, and the data signal assigned to said another terminal apparatus is a data signal with which a dedicated data signal for the terminal apparatus is multiplexed.
11 . A method to be executed in a base station apparatus for performing a radio communication with a terminal apparatus using a spatial division multiplex access method in a downlink, the method comprising:
generating a simultaneous connection information data sequence, the simultaneous connection information data sequence including a pilot sequence number concerning a number of a pilot signal assigned to another terminal apparatus;
multiplexing a signal of the generated simultaneous connection information data sequence with a dedicated data signal which indicates data to be transmitted to the terminal apparatus;
transmitting, to the terminal apparatus, the multiplexed signal which includes the simultaneous connection information data sequence; and
transmitting, to the terminal apparatus, a unique pilot signal which is different from said pilot signal assigned to said another terminal apparatus.
12 . A method to be executed in a terminal apparatus for performing a radio communication with a base station apparatus using a spatial division multiplex access method in a downlink, the method comprising:
receiving, from the base station apparatus, a multiplexed signal which includes a simultaneous connection information data sequence; and
receiving, from the base station apparatus, a unique pilot signal which is different from a pilot signal assigned to another terminal apparatus, wherein
the simultaneous connection information data sequence includes a pilot sequence number concerning a number of said pilot signal assigned to said another terminal apparatus.
13 . A radio communication system in which a base station apparatus performs a radio communication with a terminal apparatus using a spatial division multiplex access method in a downlink, wherein
the base station apparatus comprises:
a simultaneous connection information generation section that generates a simultaneous connection information data sequence, the simultaneous connection information data sequence including a pilot sequence number concerning a number of a pilot signal assigned to another terminal apparatus;
a multiplexing section that multiplexes a signal of the generated simultaneous connection information data sequence with a dedicated data signal which indicates data to be transmitted to the terminal apparatus; and
a transmission section that transmits, to the terminal apparatus, the multiplexed signal which includes the simultaneous connection information data sequence, and transmits, to the terminal apparatus, a unique pilot signal which is different from said pilot signal assigned to said another terminal apparatus, and wherein
the terminal apparatus comprises:
a simultaneous connection information reception section that receives, from the base station apparatus, the multiplexed signal which includes the simultaneous connection information data sequence, and the unique pilot signal.