US 2020/0404595 A1Published application

User equipment

AssigneeNtt Docomo, Inc.

InventorsTomoya Ohara, Ryosuke Osawa

Life of this patent

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Abstract

A user equipment communicates with a base station using a first RAT and a second RAT, including: a transmission unit to perform uplink transmission using the first RAT and the second RAT; a control unit to, if a sum of transmission powers of the uplink transmission via the first RAT and the second RAT exceeds a predetermined maximum transmission power, reduce the transmission power of the uplink transmission via the second RAT. If the sum exceeds a maximum transmission power and the transmission unit fails to transmit random access preamble via the second RAT and re-transmits the random access preamble, or if dynamic power sharing is not supported and the random access preamble is not transmitted via the second RAT in a slot where an uplink transmission via the first RAT is scheduled, the control unit changes transmission power control for the re-transmitted random access preamble from normal control.

Claims6

Dependent claims

A user equipment that communicates with a base station using a first RAT and a second RAT, the user equipment comprising:

a transmission unit configured to perform uplink transmission via both the first RAT and the second RAT;
and
a control unit configured to, if a sum of transmission power of the uplink transmission via the first RAT and transmission power of the uplink transmission via the second RAT exceeds a predetermined maximum power, reduce the transmission power of the uplink transmission via the second RAT,
wherein, in a case where the sum exceeds the predetermined maximum power and the transmission unit fails to transmit a random access preamble via the second RAT and re-transmits the random access preamble, or, in a case where dynamic power sharing is not supported and the random access preamble is not transmitted via the second RAT in a slot in which an uplink transmission via the first RAT is scheduled,
the control unit changes transmission power control for the re-transmitted random access preamble from normal transmission power control.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/968,791Filed 15 Feb 2018
Published: 24 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 52/34
Using constraints in the total amount of available transmission power: tPC management, i.e. sharing limited amount of power among users or…
H04W 52/367
With a discrete range or set of values, e.g. step size, ramping or offsets: power values between minimum and maximum limits, e.g. dynamic range
H04W 52/146
Separate analysis of uplink or downlink: uplink power control
H04W 52/325
TPC of broadcast or control channels: power control of control or pilot channels

Family

US 11,388,683 B2Related patent
US 2020/0404595 A1This patent

From the US filing history. Foreign family members aren’t listed.

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