US 12,756,513 B2Granted

Demodulation reference signal bundling of a message of a random access procedure

AssigneeQUALCOMM Incorporated

InventorsLiangping Ma, Xiao Feng Wang, Changhwan Park, Alberto Rico Alvarino, Bharat Shrestha, Mahmoud Taherzadeh Boroujeni, Gokul Sridharan, Sanghoon Kim, Jae Ho Ryu, Peter Gaal

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Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may communicate, before establishing a radio resource control (RRC) connection, support for demodulation reference signal (DMRS) bundling of a message of a random access (RA) procedure. The UE may transmit the message of the RA procedure based at least in part on the support for DMRS bundling. Numerous other aspects are described.

Claims30

Dependent claims

A user equipment (UE) for wireless communication, comprising:

one or more memories;
and
one or more processors coupled to the one or more memories, which are configured, individually or in any combination, to:
communicate, to a network node and before establishing a radio resource control (RRC) connection, an indication of support for demodulation reference signal (DMRS) bundling of a message of a random access (RA) procedure, wherein the one or more processors, to communicate the support for DMRS bundling of the message of the RA procedure, are configured, individually or in any combination, to transmit an additional message of the RA procedure,
wherein one or more of an RA channel occasion, a preamble, or a DMRS pattern used in the message are associated with a capability of the UE to support DMRS bundling of a subsequent message of the RA procedure;
and
transmit, to the network node, the message of the RA procedure based at least in part on the support for DMRS bundling.

4 more elements

A user equipment (UE) for wireless communication, comprising:

one or more memories;
and
one or more processors coupled to the one or more memories, which are configured, individually or in any combination, to:
communicate, to a network node and before establishing a radio resource control (RRC) connection, an indication of support for demodulation reference signal (DMRS) bundling of a message of a random access (RA) procedure;
transmit, to the network node, the message of the RA procedure based at least in part on the support for DMRS bundling;
and
initiate a physical random access channel (PRACH) procedure based at least in part on failing to receive a response to the message of the RA procedure within a timing window that is based at least in part on a round-trip time between the UE and a network node, or
receive an indication of a configuration of a control channel search space having a periodicity that is based at least in part on the UE being in a sleep mode during a round-trip-time window.

5 more elements

A user equipment (UE) for wireless communication, comprising:

one or more memories;
and
one or more processors coupled to the one or more memories, which are configured, individually or in any combination, to:
communicate, to a network node and before establishing a radio resource control (RRC) connection, an indication of support for demodulation reference signal (DMRS) bundling of a message of a random access (RA) procedure, wherein the one or more processors, to communicate the support for DMRS bundling of the message of the RA procedure, are configured, individually or in any combination, to transmit an indication of a repetition request having a value that maps to the support for DMRS bundling of the message of the RA procedure;
and
transmit, to the network node, the message of the RA procedure based at least in part on the support for DMRS bundling.

3 more elements

A user equipment (UE) for wireless communication, comprising

one or more memories;
and
one or more processors coupled to the one or more memories, which are configured, individually or in any combination, to:
communicate, to a network node and before establishing a radio resource control (RRC) connection, an indication of support for demodulation reference signal (DMRS) bundling of a message of a random access (RA) procedure, wherein the one or more processors, to communicate the support for DMRS bundling of the message of the RA procedure, are configured, individually or in any combination, to:
receive a first indication of one or more of a first available DMRS port, a first DMRS sequence, or a first DMRS pattern associated with support for DMRS bundling;
receive a second indication of one or more of a second available DMRS port, a second DMRS sequence, or a second DMRS pattern associated with a lack of support for DMRS bundling;
transmit the message of the RA procedure using the first available DMRS port, the first DMRS sequence, or the first DMRS pattern to indicate support for DMRS bundling or using the second available DMRS port, the second DMRS sequence, or the second DMRS pattern to indicate a lack of support for DMRS bundling;
and
transmit, to the network node, the message of the RA procedure based at least in part on the support for DMRS bundling.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/365,120Filed 3 Aug 2023 · us provisional application
Priority: 8 Aug 2022
Published: US 2024/0048312 A18 Feb 2024
Granted: 6 Oct 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04W 74/004
Transmission of channel access control information: in the uplink, i.e. towards network
H04W 74/0833
Non-scheduled access, e.g. ALOHA: random access procedures, e.g. with 4-step access
H04L
Digital communication