Title:
WIRELESS BASE STATION DEVICE, USER TERMINAL, WIRELESS COMMUNICATIONS SYSTEM, AND WIRELESS COMMUNICATIONS METHOD
Document Type and Number:
WIPO Patent Application WO/2013/141114
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide reference signals for demodulation that are suitable for enhanced downlink control channels. This wireless base station device comprises: a multiplication unit that multiplies the downlink control information allocated to a resource area for enhanced downlink control channels (eCCE) inside a resource block, by a user terminal-specific weight; and a notification unit that notifies a user terminal of one group from among a plurality of groups configured by the selection of different antenna ports for each from among a plurality of antenna ports corresponding to the number of transmission layers for reference signals for demodulation. In each group, each resource area for enhanced downlink control channels inside the resource block is associated to antenna ports configuring the group. The multiplication unit multiplies, by the weight, the reference signals for demodulation corresponding to the antenna ports associated in the one group to the resource area for enhanced downlink control channels to which the downlink control information was allocated.
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Inventors:
TAKEDA KAZUAKI (JP)
NAGATA SATOSHI (JP)
KISHIYAMA YOSHIHISA (JP)
NAGATA SATOSHI (JP)
KISHIYAMA YOSHIHISA (JP)
Application Number:
PCT/JP2013/057042
Publication Date:
September 26, 2013
Filing Date:
March 13, 2013
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
International Classes:
H04J99/00; H04B7/04; H04J11/00; H04J13/00; H04W4/00; H04W72/04
Domestic Patent References:
| WO2013069663A1 | 2013-05-16 |
Other References:
NTT DOCOMO: "DM-RS Antenna Port Association for E-PDCCH in Rel-11", 3GPP TSG-RAN WG1#68B, 20 March 2012 (2012-03-20), XP050599755, Retrieved from the Internet
FUJITSU: "Search Space Design for Downlink Control Channel", 3GPP TSG-RAN WG1#68 RL-120752, 1 February 2012 (2012-02-01), XP050563277, Retrieved from the Internet
3RD GENERATION PARTNERSHIP PROJECT: "3GPP TR 25.913 "Requirements for Evolved UTRA and Evolved UTRAN"", 3RD GENERATION PARTNERSHIP PROJECT
See also references of EP 2830247A4
FUJITSU: "Search Space Design for Downlink Control Channel", 3GPP TSG-RAN WG1#68 RL-120752, 1 February 2012 (2012-02-01), XP050563277, Retrieved from the Internet
3RD GENERATION PARTNERSHIP PROJECT: "3GPP TR 25.913 "Requirements for Evolved UTRA and Evolved UTRAN"", 3RD GENERATION PARTNERSHIP PROJECT
See also references of EP 2830247A4
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
Hiroyoshi Aoki (JP)
Hiroyoshi Aoki (JP)
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