Title:
BEAM RECOVERY IN A MULTIPLE BANDWIDTH PART ENVIRONMENT
Document Type and Number:
WIPO Patent Application WO/2019/136587
Kind Code:
A1
Abstract:
Methods, systems, and devices for wireless communications in a multiple bandwidth part environment are described. In response to a serving beam failure in an active bandwidth part, the UE may determine a level of support provided by the active bandwidth part for a random access procedure, and may determine a contingency (e.g. fallback) bandwidth part that supports the random access procedure. In some cases, the UE may identify the contingency bandwidth as an initial bandwidth part used by the UE for a prior random access procedure. In some cases, the base station may send to the UE, an explicit indication of the contingency bandwidth part. In some cases, the UE may identify the contingency bandwidth part based on a reference signal. Upon determining the contingency bandwidth part, the UE may perform the random access procedure using the contingency bandwidth part.
Inventors:
CHENG PENG (US)
WEI CHAO (US)
ZHANG YU (US)
XU HAO (US)
HE LINHAI (US)
WEI CHAO (US)
ZHANG YU (US)
XU HAO (US)
HE LINHAI (US)
Application Number:
PCT/CN2018/071877
Publication Date:
July 18, 2019
Filing Date:
January 09, 2018
Export Citation:
Assignee:
QUALCOMM INC (US)
CHENG PENG (CN)
WEI CHAO (CN)
ZHANG YU (CN)
XU HAO (CN)
HE LINHAI (US)
CHENG PENG (CN)
WEI CHAO (CN)
ZHANG YU (CN)
XU HAO (CN)
HE LINHAI (US)
International Classes:
H04W16/28
Domestic Patent References:
| WO2011015097A1 | 2011-02-10 |
Foreign References:
| CN107493605A | 2017-12-19 |
Other References:
3GPP: "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical Layer Procedures for Control (Release 15", 3GPP TS 38.213 V15.0.0 ., 31 December 2017 (2017-12-31), pages 1 - 56, XP055625141
MEDIATEK INC: "Discussion on Beam Recovery Mechanism", 3GPP DRAFT; RI-1707832, 14 May 2017 (2017-05-14)
MEDIATEK INC: "Further Details on Beam Failure Recovery", 3GPP DRAFT; RI-1719566, 18 November 2017 (2017-11-18)
See also references of EP 3738336A4
MEDIATEK INC: "Discussion on Beam Recovery Mechanism", 3GPP DRAFT; RI-1707832, 14 May 2017 (2017-05-14)
MEDIATEK INC: "Further Details on Beam Failure Recovery", 3GPP DRAFT; RI-1719566, 18 November 2017 (2017-11-18)
See also references of EP 3738336A4
Attorney, Agent or Firm:
NTD PATENT & TRADEMARK AGENCY LIMITED (CN)
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