US 11,979,919 B2 · Flexible random access channel configurations

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a base station in a wireless communications system. The UE may perform a random access procedure to communicate with the base station. The base station may configure the UE with different sets of preamble parameters for different types of UEs. The UE may generate a random access preamble based on the sets of preamble parameters according to the type of the UE. The base station may indicate a location of the base station to the UE. The UE may identify a location of the UE. The UE may determine a pre-compensation timing based on a distance from the two locations. The UE and the base station may transmit subsequent communication according to the random access preamble, the pre-compensation timing, or any combination thereof.

Claims26

Dependent claims

An apparatus for wireless communication, comprising:

a memory;
and
at least one processor coupled to the memory, wherein the at least one processor is configured to:
receive, from a network device, system information comprising a first set of random access preamble parameters for random access preambles associated with user equipments (UEs) of a first type and a second set of random access preamble parameters for random access preambles associated with UEs of a second type, wherein the first set of random access preamble parameters comprises a first set of cyclic shifts and the second set of random access preamble parameters comprises a second set of cyclic shifts, the second set of cyclic shifts differs from the first set of cyclic shifts, and each cyclic shift of the second set of cyclic shifts differs from each other cyclic shift of the second set of cyclic shifts by at least a first amount;
generate a random access preamble based at least in part on the first set of cyclic shifts of the first set of random access preamble parameters or the second set of cyclic shifts of the second set of random access preamble parameters;
and
transmit the random access preamble to the network device.

4 more elements

An apparatus for wireless communications, comprising:

a memory;
and
at least one processor coupled to the memory, wherein the at least one processor is configured to:
transmit, to a user equipment (UE), system information comprising a first set of random access preamble parameters for random access preambles associated with UEs of a first type and a second set of random access preamble parameters for random access preambles associated with UEs of a second type, wherein the first set of random access preamble parameters comprises a first set of cyclic shifts and the second set of random access preamble parameters comprises a second set of cyclic shifts, the second set of cyclic shifts differs from the first set of cyclic shifts, and each cyclic shift of the second set of cyclic shifts differs from each other cyclic shift of the second set of cyclic shifts by at least a first amount;
receive, from the UE based at least in part on transmission of the system information, a random access preamble based at least in part on the first set of cyclic shifts of the first set of random access preamble parameters or the second set of cyclic shifts of the second set of random access preamble parameters;
and
transmit, to the UE, a random access message responsive to the random access preamble.

4 more elements

A method of wireless communications, comprising:

receiving, from a network device, system information comprising a first set of random access preamble parameters for random access preambles associated with user equipments (UEs) of a first type and a second set of random access preamble parameters for random access preambles associated with UEs of a second type, wherein the first set of random access preamble parameters comprises a first set of cyclic shifts and the second set of random access preamble parameters comprises a second set of cyclic shifts, the second set of cyclic shifts differs from the first set of cyclic shifts, and each cyclic shift of the second set of cyclic shifts differs from each other cyclic shift of the second set of cyclic shifts by at least a first amount;
generating a random access preamble based at least in part on the first set of cyclic shifts of the first set of random access preamble parameters or the second set of cyclic shifts of the second set of random access preamble parameters;
and
transmitting the random access preamble to the network device.

1 more element

A method of wireless communications, comprising:

transmitting, to a user equipment (UE), system information comprising a first set of random access preamble parameters for random access preambles associated with UEs of a first type and a second set of random access preamble parameters for random access preambles associated with UEs of a second type, wherein the first set of random access preamble parameters comprises a first set of cyclic shifts and the second set of random access preamble parameters comprises a second set of cyclic shifts, the second set of cyclic shifts differs from the first set of cyclic shifts, and each cyclic shift of the second set of cyclic shifts differs from each other cyclic shift of the second set of cyclic shifts by at least a first amount;
receiving, from the UE based at least in part on transmitting the system information, a random access preamble based at least in part on the first set of cyclic shifts of the first set of random access preamble parameters or the second set of cyclic shifts of the second set of random access preamble parameters;
and
transmitting, to the UE, a random access message responsive to the random access preamble.

1 more element

Dependencies are inferred from the claim text.

Flexible random access channel configurations

Life of this patent

Flexible random access channel configurations

Life of this patent

Abstract

Claims26