Patent · US Active

Data transmitting method, base station apparatus and mobile station apparatus

US8848646B2 · kind B2 · utility

1Cited by

0References

19Claims

0Family size

Assignee

NTT DOCOMO, INC. · JP

Inventors

Yuichi Kakishima · Tokyo, JP
Hidekazu Taoka · Tokyo, JP

Key dates

Filing date	Apr 21, 2011
Grant date	Sep 30, 2014
Priority date	—
Expiry date	Jun 20, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04W88/08
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A data rate in MIMO transmission is increased to a maximum even when the number of transmitting antennas of a mobile station apparatus is different from the number of transmitting antennas of the mobile station apparatus supported by a base station apparatus. The base station apparatus (eNodeB) reports the maximum number of supported antennas of the mobile station apparatus (UE) supported by the base station apparatus (eNodeB) to the mobile station apparatus (UE) (ST11). The mobile station apparatus (UE) compares the number of supported antennas with the number of transmitting antennas of the mobile station apparatus (UE), selects the smaller number of antennas as a number of virtual antennas (ST12), and reports the number of virtual antennas to the base station apparatus (eNodeB) (ST13). The base station apparatus (eNodeB) instructs the mobile station apparatus to transmit a data channel signal in accordance with the number of virtual antennas (ST15). The mobile station apparatus (UE) transmits a data channel signal to the base station apparatus (eNodeB) in accordance with the number of virtual antennas (ST20).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.