US 12,114,327 B2Granted

Apparatus and method for semi-persistent scheduling and power control in wireless communication system

AssigneeSamsung Electronics Co., Ltd.

InventorsFeifei Sun, Jingxing Fu

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Abstract

A method performed by a user equipment (UE) is provided. The method includes receiving, from a base station, configuration information on a random access configuration for a narrowband including: information on an initial power of a random access preamble for an enhanced coverage level, and information associated with a power ramping for the enhanced coverage level, and performing a first random access preamble transmission corresponding to a first transmit power, wherein the first transmit power is set based on the information on the initial power of the random access preamble and the information associated with the power ramping in case that the UE is in the enhanced coverage level, and wherein the UE is a narrow band internet of things (NB-IoT) UE.

Claims12

Dependent claims

A method performed by a narrow band internet of things (NB-IoT) user equipment (UE), the method comprising:

receiving, from a base station, a radio resource control (RRC) message including configuration information associated with a plurality of enhanced coverage levels, wherein the configuration information associated with the plurality of enhanced coverage levels includes:
information on an initial power of a random access preamble for a first enhanced coverage level,
information associated with a power ramping for the first enhanced coverage level,
information on an initial power of a random access preamble for a second enhanced coverage level, and
information associated with a power ramping for the second enhanced coverage level;
identifying the UE belongs to the first enhanced coverage level based on a reference signal received power (RSRP);
identifying a first transmit power, determined by the information on the initial power of the random access preamble for the first enhanced coverage level;
performing a first random access preamble transmission based on the first transmit power;
performing retransmissions using the information associated with the power ramping for the first enhanced coverage level, used for the first enhanced coverage level of the UE in case that a random access response corresponding to the first random access preamble transmission is not received;
in case that the first random access preamble transmission is not successful by the retransmission, continue performing, by the UE, preamble transmission attempts based on the information associated with the power ramping for the first enhanced coverage level in case that a maximum number of preamble transmission attempt is not reached in the first enhanced coverage level;
and
in case that the maximum number of preamble transmission attempt is reached in the first enhanced coverage level,
selecting a resource corresponding to a second enhanced coverage, used for a second random access preamble transmission,
identifying a second transmit power, determined by the initial power of the random access preamble for the second enhanced coverage level,
performing the second random access preamble transmission based on the second transmit power, and
performing retransmissions using the information associated with the power ramping for the second enhanced coverage level, used for the second enhanced coverage level of the UE in case that a random access response corresponding to the second random access preamble transmission is not received,
wherein the first enhanced coverage level is different from the second enhanced coverage level.

14 more elements

A method performed by a base station (BS), the method comprising:

transmitting, to a narrow band internet of things (NB-IoT) user equipment (UE), a radio resource control (RRC) message including configuration information associated with a plurality of enhanced coverage levels, wherein the configuration information associated with the plurality of enhanced coverage levels includes:
information on an initial power of a random access preamble for a first enhanced coverage level,
information associated with a power ramping for the first enhanced coverage level,
information on an initial power of a random access preamble for a second enhanced coverage level, and
information associated with a power ramping for the second enhanced coverage level;
receiving, from the UE, a first random access preamble transmitted based on a first transmit power, used for the first enhanced coverage level identified by the UE based on the configuration information;
transmitting a random access response corresponding to the first random access preamble;
and
in response to transmitting the random access response, receiving, from the UE, a second random access preamble on a resource corresponding to a second enhanced coverage, used for a second random access preamble transmission, transmitted based on a second transmit power, in case that the random access response corresponding to the first random access preamble is not received by the UE and a maximum number of preamble transmission attempt is reached in the first enhanced coverage level, the second transmit power is used for the second enhanced coverage level identified by the UE based on the configuration information,
wherein the first enhanced coverage level is different from the second enhanced coverage level.

7 more elements

A narrow band internet of things (NB-IoT) user equipment (UE), the UE comprising:

a transceiver;
and
at least one processor coupled to the transceiver,
wherein the at least one processor is configured to:
receive, from a base station, a radio resource control (RRC) message including configuration information associated with a plurality of enhanced coverage levels, wherein the configuration information associated with the plurality of enhanced coverage levels includes:
information on an initial power of a random access preamble for a first enhanced coverage level,
information associated with a power ramping for the first enhanced coverage level,
information on an initial power of a random access preamble for a second enhanced coverage level, and
information associated with a power ramping for the second enhanced coverage level,
identify the UE belongs to the first enhanced coverage level based on a reference signal received power (RSRP),
identify a first transmit power, determined by the information on the initial power of the random access preamble for the first enhanced coverage level,
perform a first random access preamble transmission based on the first transmit power,
perform retransmissions using the information associated with the power ramping for the first enhanced coverage level, used for the first enhanced coverage level of the UE in case that a random access response corresponding to the first random access preamble transmission is not received,
in case that the first random access preamble transmission is not successful by the retransmission, continue to perform preamble transmission attempts based on the information associated with the power ramping for the first enhanced coverage level in case that a maximum number of preamble transmission attempt is not reached in the first enhanced coverage level, and
in case that the maximum number of preamble transmission attempt is reached in the first enhanced coverage level,
select resource corresponding to a second enhanced coverage, used for a second random access preamble transmission,
identify a second transmit power, determined by the initial power of the random access preamble for the second enhanced coverage level,
perform the second random access preamble transmission based on the second transmit power, and
perform retransmissions using the information associated with the power ramping for the second enhanced coverage level, used for the second enhanced coverage level of the UE in case that a random access response corresponding to the second random access preamble transmission is not received,
wherein the first enhanced coverage level is different from the second enhanced coverage level.

17 more elements

A base station (BS), the BS comprising:

a transceiver;
and
at least one processor coupled to the transceiver,
wherein the at least one processor is configured to:
transmit, to a narrow band internet of things (NB-IoT) user equipment (UE), a radio resource control (RRC) message including configuration information associated with a plurality of enhanced coverage levels, wherein the configuration information associated with the plurality of enhanced coverage levels includes:
information on an initial power of a random access preamble for a first enhanced coverage level,
information associated with a power ramping for the first enhanced coverage level,
information on an initial power of a random access preamble for a second enhanced coverage level, and
information associated with a power ramping for the second enhanced coverage level,
receive, from the UE, a first random access preamble transmitted based on a first transmit power, used for the first enhanced coverage level identified by the UE based on the configuration information, and
transmit a random access response corresponding to the first random access preamble, and
in response to the transmission of the random access response, receive, from the UE, a second random access preamble on a resource corresponding to a second enhanced coverage, used for a second random access preamble transmission, transmitted based on a second transmit power, in case that the random access response corresponding to the first random access preamble is not received by the UE and a maximum number of preamble transmission attempt is reached in the first enhanced coverage level, the second transmit power is used for the second enhanced coverage level identified by the UE based on the configuration information,
wherein the first enhanced coverage level is different from the second enhanced coverage level.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/872,815Filed 25 Jul 2022 · continuation
Priority: CN 201710186528.624 Mar 2017
Published: US 2022/0361157 A110 Nov 2022
Granted: 8 Oct 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H04W 72/23
Control channels or signalling for resource management: in the downlink direction of a wireless link, i.e. towards a terminal
H04L 1/1854
Arrangements specially adapted for the receiver end: scheduling and prioritising arrangements
H04L 1/1864
Arrangements specially adapted for the receiver end: aRQ related signaling
H04L 1/1887
Arrangements specially adapted for the transmitter end: scheduling and prioritising arrangements

Family

Application15/933,886Parent of this continuation · filed 23 Mar 2018
US 11,399,364 B2Parent of this continuation · filed 26 Jul 2022
US 2022/0361157 A1Pre-grant publication · published 10 Nov 2022
US 2018/0279274 A1Published application
US 12,114,327 B2This patent

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

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