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Patent Searching and Data


Title:
CONFIGURATION OF DEMODULATION REFERENCE SIGNALS IN BEAMFORMED WIRELESS COMMUNICATION SYSTEMS
Document Type and Number:
WIPO Patent Application WO/2019/139687
Kind Code:
A3
Abstract:
Various embodiments disclosed herein provide for efficient configuration of demodulation reference signals in beamformed wireless communications systems. In an embodiment, the transmitter can signal the location of demodulation reference signals (DMRS) by including an indicator bit in downlink control information indicating which DMRS scheme is used in the transmission. A first DMRS scheme can let the user equipment (UE) device know that the DMRS position for the PDSCH carrying the RMSI is as signaled on the master information block (MIB) - referred to as PDSCH Mapping Type A. A second DMRS scheme can let the UE device know that the DMRS position for the PDSCH carrying the RMSI is the first orthogonal frequency division multiplexing (OFDM) symbol of said PDSCH allocation - referred to as PDSCH mapping type B).

Inventors:
BENDLIN RALF (US)
NOVLAN THOMAS (US)
WANG XIAOYI (US)
GHOSH ARUNABHA (US)
Application Number:
US2018/063118
Publication Date:
August 22, 2019
Filing Date:
November 29, 2018
Export Citation:
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Assignee:
AT & T IP I LP (US)
International Classes:
H04L5/00; H04B7/04; H04L27/26; H04W72/04
Foreign References:
US20100303034A12010-12-02
Other References:
NTT DOCOMO ET AL: "Discussion on remaining details on NR-PBCH and PBCH-DMRS", vol. RAN WG1, no. Nagoya, Japan; 20170918 - 20170921, 17 September 2017 (2017-09-17), XP051339528, Retrieved from the Internet [retrieved on 20170917]
LG ELECTRONICS: "Discussion on search space design", vol. RAN WG1, no. Prague, CZ; 20171009 - 20171013, 8 October 2017 (2017-10-08), XP051341136, Retrieved from the Internet [retrieved on 20171008]
AT&T: "Remaining details for DMRS design", vol. RAN WG1, no. Reno, USA; 20171127 - 20171201, 18 November 2017 (2017-11-18), XP051369444, Retrieved from the Internet [retrieved on 20171118]
SPREADTRUM COMMUNICATIONS: "Remaining issues on DMRS", vol. RAN WG1, no. Reno, USA; 20171127 - 20171201, 17 November 2017 (2017-11-17), XP051368850, Retrieved from the Internet [retrieved on 20171117]
AT&T: "On DCI contents and formats", vol. RAN WG1, no. Reno, USA; 20171127 - 20171201, 18 November 2017 (2017-11-18), XP051369449, Retrieved from the Internet [retrieved on 20171118]
ZTE: "Discussion on downlink DMRS design", vol. RAN WG1, no. Hangzhou; 20170515 - 20170519, 7 May 2017 (2017-05-07), XP051262918, Retrieved from the Internet [retrieved on 20170507]
INTERDIGITAL COMMUNICATIONS: "On NR-PBCH Transmission", vol. RAN WG1, no. Spokane, USA; 20170403 - 20170407, 25 March 2017 (2017-03-25), XP051251957, Retrieved from the Internet [retrieved on 20170325]
"NR-PBCH design", vol. RAN WG1, no. Spokane, USA; 20170403 - 20170407, 2 April 2017 (2017-04-02), XP051243451, Retrieved from the Internet [retrieved on 20170402]
Attorney, Agent or Firm:
WATSON, Thomas E et al. (Amin, Turocy & Watson LLP,200 Park Avenue, Suite 30, Beachwood Ohio, 44122, US)
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