US 11,147,117 B2 · Timing advance validation for transmission in preconfigured uplink resources in NB-IoT

Abstract

Various examples and schemes pertaining to timing advance validation for transmission in preconfigured uplink resources in narrowband Internet of Things (NB-IoT) are described. When in a first mode, an apparatus (e.g., a user equipment) receives a plurality of different values for a time alignment timer (TAT) from a network before entering a second mode from the first mode. When in the second mode, the apparatus selects one of the plurality of values to apply to the TAT and also starts the TAT to count. When there is data for uplink transmission while the apparatus is still in the second mode, the apparatus performs an early data transmission in an event that a timing advance (TA) value is valid and that the apparatus is in the same serving cell as it was before entering the second mode.

Claims20

Dependent claims

A method, comprising:

receiving, by a processor of an apparatus in a first mode, a configuration of a plurality of different values for a time alignment timer (TAT) from a network before entering a second mode from the first mode;
and
when the apparatus is in the second mode, performing, by the processor, operations comprising:
selecting one of the plurality of values to apply to the TAT;
starting the TAT to count;
and
responsive to the TAT having not expired, performing an early data transmission (EDT) to the network by skipping a Message 1 and a Message 2 in an EDT random access procedure to directly transmit data in a Message 3 to the network node.

4 more elements

An apparatus, comprising:

a communication device configured to wirelessly communicate with a network;
and
a processor coupled to the communication device and configured to perform operations comprising:
receiving, via the communication device when the apparatus is in a first mode, a configuration of a plurality of different values for a time alignment timer (TAT) from the network before entering a second mode from the first mode;
and
when the apparatus is in the second mode, performing operations comprising:
selecting one of the plurality of values to apply to the TAT;
starting the TAT to count;
and
responsive to the TAT having not expired, performing, via the communication device, an early data transmission (EDT) to the network by skipping a Message 1 and a Message 2 in an EDT random access procedure to directly transmit data in a Message 3 to the network node.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/586,255Filed 27 Sep 2019 · us provisional application

Priority

28 Sep 2018

Published

US 2020/0107389 A12 Apr 2020

Granted

12 Oct 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04W 56/0045
Compensating for timing error of reception due to propagation delay: compensating for timing error by altering transmission time
H04W 76/27
Manipulation of established connections: transitions between radio resource control [RRC] states
H04L 41/0806
Configuration setting: for initial configuration or provisioning, e.g. plug-and-play
H04L 67/12
Protocols: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in…

Timing advance validation for transmission in preconfigured uplink resources in NB-IoT

Life of this patent

Timing advance validation for transmission in preconfigured uplink resources in NB-IoT

Life of this patent

Abstract

Claims20