Abstract
The present invention relates to a method for transmitting a reference signal (RS) for measuring a channel in a downlink MIMO (Multi Input Multi Output) system that supports: a first user device supporting N base station transmission antennas out of a total of M base station transmission antennas and a second user device supporting M (M>N) base station transmission antennas. The method comprises the steps of: grouping a certain number of subframes or a resource block (RB) to transmit a common reference signal (CRS) for M transmission antennas from the base station; and transmitting the subframes or the resource block to the second user device. The grouped subframes or the resource block are transmitted to the second user terminal in a specific time period and in the subframes or the resource block the common reference signal is mapped to different transmission antenna ports corresponding to a quotient which is obtained by dividing M by a specific number.
The present invention relates to a method for transmitting a reference signal (RS) for measuring a channel in a downlink MIMO (Multi Input Multi Output) system that supports: a first user device supporting N base station transmission antennas out of a total of M base station transmission antennas and a second user device supporting M (M>N) base station transmission antennas. The method comprises the steps of: grouping a certain number of subframes or a resource block (RB) to transmit a common reference signal (CRS) for M transmission antennas from the base station; and transmitting the subframes or the resource block to the second user device. The grouped subframes or the resource block are transmitted to the second user terminal in a specific time period and in the subframes or the resource block the common reference signal is mapped to different transmission antenna ports corresponding to a quotient which is obtained by dividing M by a specific number.
The invention relates to a method used in a downlink MIMO (Multiple Input Multiple Output) system a transmission-purpose measured channel of reference signal. the method comprises the following step: the base station configured with Nt transmit antennas to configure Nt reference signal for channel measurement wherein Nt is not less than 1; and transmitting the reference signal to the user equipment in the subframe at a specific period by the base station. special cycle is configured over one of the sub-frame.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 4G | 03/08/2011 | ISLD-201107-003 | LG | No | Family Member | ||||
| Not Available | 16/09/2012 | ISLD-201209-004 | LG | No | Family Member | ||||
| Not Available | 22/10/2012 | ISLD-201209-014 | LG | No | Family Member | ||||
| 4G | 30/09/2014 | ISLD-201410-002 | LG | Yes | Family Member | ||||
Specification Information
Specification Information
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
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