TECHNIQUES AND APPARATUSES FOR 5G TO 2G/3G FALLBACK WITHOUT ACCESSING A LTE AIR INTERFACE

Title:

TECHNIQUES AND APPARATUSES FOR 5G TO 2G/3G FALLBACK WITHOUT ACCESSING A LTE AIR INTERFACE

Document Type and Number:

WIPO Patent Application WO/2019/075598

Kind Code:

A1

Abstract:

Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a 4G/LTE base station and via a 5G/NR base station, a first handover command message identifying at least one of a measurement configuration or a measurement gap for identifying a 2G/3G cell, wherein the first handover command message is associated with a 5G/NR to 2G/3G handover of the UE via 4G/LTE; transmit, to the 4G/LTE base station and via the 5G/NR base station, a measurement report regarding the 2G/3G cell based at least in part on the measurement configuration and/or the measurement gap; and tune to the 2G/3G cell based at least in part on a second handover message, received from the 4G/LTE base station via the 5G/NR base station, for performance of the call via the 2G/3G cell. Numerous other aspects are provided.

Inventors:

ZHU XIPENG (US)
HORN GAVIN BERNARD (US)
ZHANG JUAN (US)
ZISIMOPOULOS HARIS (US)
BALASUBRAMANIAN SRINIVASAN (US)

Application Number:

PCT/CN2017/106264

Publication Date:

April 25, 2019

Filing Date:

October 16, 2017

Export Citation:

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Assignee:

QUALCOMM INC (US)
ZHU XIPENG (CN)
HORN GAVIN BERNARD (US)
ZHANG JUAN (CN)
ZISIMOPOULOS HARIS (GB)
BALASUBRAMANIAN SRINIVASAN (US)

International Classes:

H04W36/00; H04W36/14

Domestic Patent References:

WO2016073099A1

2016-05-12

Foreign References:

CN107172067A	2017-09-15
CN101888675A	2010-11-17

Attorney, Agent or Firm:

NTD PATENT & TRADEMARK AGENCY LIMITED (CN)

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