Apparatus and method for mode transition of a transmit diversity scheme in a mobile communication system for using transmit diversity
First Claim
1. A method for controlling a Node B to change a Transmit Diversity scheme to another scheme in a mobile communication system including the Node B for transmitting data using the Transmit Diversity scheme and a Mobile Station (ms) for transmitting weights of antennas to the Node B to provide the Node B with maximum Transmit Diversity performance, such that it can implement a maximum Transmit Diversity, the method comprising the steps of:
- determining whether there is a mode transition in the Transmit Diversity scheme upon receiving Transmit Diversity information;
generating weights associated with individual antennas using a predetermined relationship between weights for use in different Transmit Diversity schemes if it is determined that the mode transition occurs in the Transmit Diversity scheme; and
transmitting data using the generated weights.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus and method for Transmit Diversity mode transition in a mobile communication system for use with transmit diversity is disclosed. In a mobile communication system including a Node B comprising one or more antennas and a Mobile Station (MS) for transmitting Transmit Diversity information to the Node B to enable the plurality of antennas to implement the maximum Transmit Diversity. The apparatus and method for assigning weights to transmission data of the antennas to enable the Node B to implement the maximum Transmit Diversity when the mode transition occurs in the Transmit Diversity modes comprise determining whether the mode transition occurs using the Transmit Diversity information; and assigning a weight generated considering the relationship between a current weight and a previous weight used before the mode transition time to the data transmitted over the antennas if it is determined that the mode transition occurs.
36 Citations
19 Claims
-
1. A method for controlling a Node B to change a Transmit Diversity scheme to another scheme in a mobile communication system including the Node B for transmitting data using the Transmit Diversity scheme and a Mobile Station (ms) for transmitting weights of antennas to the Node B to provide the Node B with maximum Transmit Diversity performance, such that it can implement a maximum Transmit Diversity, the method comprising the steps of:
-
determining whether there is a mode transition in the Transmit Diversity scheme upon receiving Transmit Diversity information;
generating weights associated with individual antennas using a predetermined relationship between weights for use in different Transmit Diversity schemes if it is determined that the mode transition occurs in the Transmit Diversity scheme; and
transmitting data using the generated weights. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A data transmission apparatus for implementing a maximum Transmit Diversity when changing a current Transmit Diversity scheme to another scheme in a mobile communication system including a Node B for transmitting data using a Transmit Diversity scheme and a Mobile Station (MS) for transmitting weights of a plurality of antennas to the Node B to provide the Node B with maximum Transmit Diversity performance, the apparatus comprising:
-
a mode transition determination unit for determining whether there is a mode transition in the Transmit Diversity scheme upon receiving Transmit Diversity information;
a weight generator for generating weights associated with individual antennas using a predetermined relationship between weights of different Transmit Diversity schemes according to the determination result of the mode transmission determination unit, and transmitting the generated weights to a signal processor; and
the signal processor for transmitting data using the generated weights. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for changing a Transmit Diversity scheme to another scheme in a mobile communication system including a Node B for transmitting data using the Transmit Diversity scheme and a Mobile Station (MS) for transmitting weights of a plurality of antennas to the Node B so as to provide the Node B with maximum Transmit Diversity performance, the method comprising the steps of:
-
receiving, by the MS, transmission signals from the plurality of antennas, and estimating channel state of the Node B;
determining weights of the antennas having the maximum Transmit Diversity using the estimated channel state, including the determined weights in Transmit Diversity information, and transmitting the Transmit Diversity information containing the determined result; and
determining, by the Node B, whether a mode transition occurs in the Transmit Diversity scheme on the basis of the Transmit Diversity information, and generating weights associated with individual antennas by considering a predetermined relationship between predetermined Transmit Diversity schemes if it is determined that the mode transition occurs in the Transmit Diversity scheme; and
transmitting data over the plurality of antennas using the generated weights. - View Dependent Claims (18, 19)
-
Specification