US 10,945,175 B2 · RACH-less fallback to two-step or four-step RACH with UL grant

Abstract

In accordance with example embodiments of the invention there is at least a method and apparatus to perform at least receiving, by a network device of a communication network, information providing an indication to connect to a network node of the communication network using a Random Access Channel (RACH)-less) signaling procedure; determining that connecting to the network node using the RACH-less signaling procedure has failed; and based on the RACH-less signaling procedure failing, using at least one alternative signaling procedure for connecting to the network node using uplink (UL) resources from RACH-less procedure. Further, in accordance with example embodiments of the invention there is at least a method and apparatus to perform based on a RACH-less signaling procedure from a network device failing to connect to a network node, receiving, by the network node, at least one alternative signaling procedure from the network device for the connecting; and establishing a connection with the network device based on the at least one alternative signaling procedure from the network device using the UL resources from RACH-less procedure.

Claims32

Dependent claims

A method, comprising:

receiving, by a network device of a communication network, a message providing an indication to connect to a network node of the communication network using a Random Access Channel (RACH)-less) signaling procedure;
determining that connecting to the network node using the RACH-less signaling procedure has failed;
and
based on the RACH-less signaling procedure failing, using at least one alternative signaling procedure for connecting to the network node, wherein the at least one alternative signaling procedure is reusing Uplink (UL) resources comprising at least one dedicated uplink grant assigned to the RACH-less procedure for transmitting a physical random access channel preamble associated with the at least one alternative signaling procedure to the network node.

1 more element

An apparatus comprising:

at least one processor;
and
at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least:
receive, by a network device of a communication network, a message providing an indication to connect to a network node of the communication network using a Random Access Channel (RACH)-less) signaling procedure;
determine that connecting to the network node using the RACH-less signaling procedure has failed;
and
based on the RACH-less signaling procedure failing, use at least one alternative signaling procedure for connecting to the network node wherein the at least one alternative signaling procedure is reusing Uplink (UL) resources comprising at least one dedicated uplink grant assigned to the RACH-less procedure for transmitting a physical random access channel preamble associated with the at least one alternative signaling procedure to the network node.

4 more elements

Dependencies are inferred from the claim text.

RACH-less fallback to two-step or four-step RACH with UL grant

Life of this patent

RACH-less fallback to two-step or four-step RACH with UL grant

Life of this patent

Abstract

Claims32