US 8,428,174 B2 · Method, pre-coding apparatus and wireless communication system for multiple-input multiple-output collaborative communication

Abstract

A method for multiple-input multiple-output (MIMO) collaborative communication in a wireless communication system includes at least one user equipment and M base stations performing collaborative communication with the user equipment. Here, M is an integer that is greater than or equal to 2. The method includes the following processes for each user equipment: a first level of MIMO pre-coding process is performed for each base station to acquire each first level of pre-coding matrix corresponding to each base station; a second level to the X-th level of MIMO pre-coding process is performed sequentially to acquire the second level to the X-th level of pre-coding matrices of the corresponding base stations. Here, X is an integer that is greater than or equal to 2. A pre-coding device, a user equipment and a wireless communication system related to the method are also provided.

Claims27

Dependent claims

A method for multiple-input-multiple-output (MIMO) collaborative communication in a wireless communication system, the wireless communication system including at least one user equipment and M base stations collaboratively communicating with the at least one user equipment, M being an integer greater than or equal to 2, said method comprising:

performing the following processes with respect to each user equipment:
performing a first level of MIMO pre-coding process for each base station, to acquire respective first level of pre-coding matrices corresponding to respective base stations;
performing a second level to X-th level of MIMO pre-coding process sequentially to acquire second level to X-th level of pre-coding matrices of respective base stations, X being an integer greater than or equal to 2, wherein in the X-th level of MIMO pre-coding process, the M base stations is divided into Q(X) groups, and the X-th level of MIMO pre-coding is performed to the Q(X) groups of base stations on the basis of the acquired first level to (X−1)-th level of pre-coding matrices to acquire the X-th level of pre-coding matrix of each base station group in the Q(X) base station groups, Q(X) being an integer greater than or equal to 1 and smaller than or equal to M.

A MIMO pre-coding apparatus used in a wireless communication system for performing multiple-input-multiple-output (MIMO) collaborative communication, the wireless communication system including at least one user equipment and M base stations collaboratively communicating with the at least one user equipment, M being an integer greater than or equal to 2, for each user equipment, said MIMO pre-coding apparatus including:

a first pre-coding matrix generating unit configured to perform a first level of MIMO pre-coding process for each base station to acquire respective first level of pre-coding matrices corresponding to respective base stations;
and
a second to X-th level of pre-coding matrix generating unit configured to perform a second level to X-th level of MIMO pre-coding process sequentially to acquire a second level to X-th level of pre-coding matrices of respective base stations, X being an integer greater than or equal to 2, wherein the second to X-th level pre-coding matrix generating unit comprises a X-th level of pre-coding matrix generating section configured to:
divide the M base stations into Q(X) groups, and perform the X-th level of MIMO pre-coding to the Q(X) groups of base stations on the basis of the acquired first level to (X−1)-th level of pre-coding matrices to acquire the X-th level pre-coding matrix of each group of base station in the Q(X) groups of base stations, Q(X) being an integer greater than or equal to 1 and smaller than or equal to M.

1 more element

Dependencies are inferred from the claim text.

Method, pre-coding apparatus and wireless communication system for multiple-input multiple-output collaborative communication

Life of this patent

Method, pre-coding apparatus and wireless communication system for multiple-input multiple-output collaborative communication

Life of this patent

Abstract

Claims27