Base station device, terminal device, transmission method, and reception method

US9049709B2 · kind B2 · utility

Assignee

• Panasonic Intellectual Property Corporation of America · US

Inventors

• Yoshiko Saito · Yokohama, JP
• Ayako Horiuchi · Yokohama, JP
• Seigo Nakao · Yokohama, JP
• Akihiko Nishio · Yokohama, JP
• Daichi Imamura · Beijing, CN
• Alexander Golitschek Edler von Elbwart · Darmstadt, DE
• Sujuan Feng · Langen, DE

Key dates

• Filing date: Jul 7, 2011
• Grant date: Jun 2, 2015
• Expiry date: Sep 24, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L5/0094
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A base station device causing no decrease in system throughput and guaranteeing the reception quality at a terminal when a DCI directed toward the terminal is mapped to a PDCCH region and an R-PDCCH region. A search space setting unit (103) sets a search space having a plurality of allocation candidates, in both regions. An allocation unit (106) allocates control information to a resource in one allocation candidate in the search space. The ratio of the number of allocation candidates in the R-PDCCH region to the number of allocation candidates in the PDCCH region in the search space for a terminal using DM-RS in the R-PDCCH region is equal to or greater than the ratio of the number of allocation candidates in the R-PDCCH region to the number of allocation candidates in the PDCCH region in the search space for a terminal using CRS in the R-PDCCH region.