Downlink transmission method and apparatus
US-2024421870-A1 · Dec 19, 2024 · US
Method, mobile terminal, base station, and system for reporting best companion precoding matrix index in communication system with double codebook
US8995541B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8995541-B2 |
| Application number | US-201013883155-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 5, 2010 |
| Priority date | Nov 5, 2010 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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A method, mobile terminal, and system for reporting BCI are provided, the method comprises the steps of: obtaining a PMI W 1 set and a PMI W 2 to be used for a mobile terminal based on a double codebook; computing a BCI W 1 set to be used for another mobile terminal based on the PMI W 1 set; selecting a BCI W 2 from the BCI W 1 set based on the PMI W 2 ; and reporting the BCI W 1 set and the BCI W 2 to a base station, wherein W 1 indicates a long-term or wideband component of the PMI and BCI, and W 2 indicates a short-term or narrowband component of the PMI and BCI. With the present disclosure, the probability that the optimal BCI W 2 is included in the shifted BCI W 1 set is increased, and the overhead for feeding-back the BCI is reduced.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of reporting BCI (best companion PMI (pre-coding matrix index)) in a wireless communication system, comprising the steps of: obtaining a PMI W 1 set and a PMI W 2 to be used for a mobile terminal based on a double codebook; computing a BCI W 1 set to be used for another mobile terminal based on the PMI W 1 set; reporting the BCI W 1 set to a base station, wherein, W 1 indicates a long-term or wideband component of the PMI and BCI, an…
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Classifications
- H04B7/0478Primary
Electricity · mapped topic
- H04B7/0456Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8995541B2 cover?
- A method, mobile terminal, and system for reporting BCI are provided, the method comprises the steps of: obtaining a PMI W 1 set and a PMI W 2 to be used for a mobile terminal based on a double codebook; computing a BCI W 1 set to be used for another mobile terminal based on the PMI W 1 set; selecting a BCI W 2 from the BCI W 1 set based on the PMI W 2 ; and reporting the BCI W 1 set and…
- Who is the assignee on this patent?
- Tong Hui, Xu Ming, Hoshino Masayuki, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H04B7/0478. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).