US 12,308,947 B2Granted

Concurrent code division and frequency division signaling via an uplink channel

AssigneeQUALCOMM Incorporated

InventorsJun Ma, Danlu Zhang, Qiang Wu, Lianghai Ji, Liangping Ma, Huilin Xu, Mohamad Sayed Hassan, Karthik Anantha Swamy, Weimin Duan

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Abstract

Methods, systems, and devices for wireless communication at a user equipment (UE) are described. A UE may operate by asynchronously transmitting code division multiple access (CDMA) uplink signals to a network entity. The UE may transmit the CDMA signals via an uplink channel that may be shared with orthogonal frequency multiplexing (OFDM) signaling transmitted by one or more other UEs. The UE may indicate to the network entity a capability for communicating with CDMA waveforms and may use CDMA waveforms based on transmitting the indication. The UE may also receive one or more parameters associated with using the CDMA waveforms, and may use CDMA waveforms based on the one or more parameters. The uplink channel may be a random access channel (RACH) and may support RACH transmissions, or may be a data channel and support data transmissions.

Claims28

Dependent claims

An apparatus for wireless communication at a user equipment (UE), comprising:

a processor;
memory coupled with the processor;
and
instructions stored in the memory and executable by the processor to cause the UE to:
transmit, to a network entity and using an orthogonal frequency division multiple access signal, a first indication that the UE supports code division multiple access transmissions that use an uplink channel, wherein the uplink channel is configured for one or more code division multiple access transmissions from a first set of one or more UEs and one or more orthogonal frequency division multiple access transmissions from a second set of one or more UEs, a code division multiple access transmission of the one or more code division multiple access transmissions at least partially concurrent with an orthogonal frequency division multiple access transmission of the one or more orthogonal frequency division multiple access transmissions;
receive a second indication of one or more parameters for the code division multiple access transmissions that use the uplink channel;
receive, from the network entity, a third indication that the uplink channel supports the code division multiple access transmissions;
and
transmit a code division multiple access signal via the uplink channel using the one or more parameters based at least in part on transmitting the first indication that the UE supports the code division multiple access transmissions that use the uplink channel and receiving the third indication that the uplink channel supports the code division multiple access transmissions.

6 more elements

An apparatus for wireless communication at a network entity, comprising:

a processor;
memory coupled with the processor;
and
instructions stored in the memory and executable by the processor to cause the network entity to:
receive, via an orthogonal frequency division multiple access signal, a first indication that a user equipment (UE) supports code division multiple access transmissions that use an uplink channel, wherein the uplink channel is configured for one or more code division multiple access transmissions from a first set of one or more UEs and one or more orthogonal frequency division multiple access transmissions from a second set of one or more UEs, a code division multiple access transmission of the one or more code division multiple access transmissions at least partially concurrent with an orthogonal frequency division multiple access transmission of the one or more orthogonal frequency division multiple access transmissions;
transmit a second indication of one or more parameters for the code division multiple access transmissions that use the uplink channel;
transmit a third indication that the uplink channel supports the code division multiple access transmissions based at least in part on a determination that a received power level fails to satisfy a threshold power level;
and
receive a code division multiple access signal via the uplink channel using the one or more parameters based at least in part on receiving the first indication that the UE supports the code division multiple access transmissions that use the uplink channel and transmitting the third indication that the uplink channel supports the code division multiple access transmissions.

6 more elements

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

transmitting, to a network entity and using an orthogonal frequency division multiple access signal, a first indication that the UE supports code division multiple access transmissions that use an uplink channel, wherein the uplink channel is configured for one or more code division multiple access transmissions from a first set of one or more UEs and one or more orthogonal frequency division multiple access transmissions from a second set of one or more UEs, a code division multiple access transmission of the one or more code division multiple access transmissions at least partially concurrent with an orthogonal frequency division multiple access transmission of the one or more orthogonal frequency division multiple access transmissions;
receiving a second indication of one or more parameters for the code division multiple access transmissions that use the uplink channel;
receiving, from the network entity, a third indication that the uplink channel supports the code division multiple access transmissions;
and
transmitting a code division multiple access signal via the uplink channel using the one or more parameters based at least in part on transmitting the first indication that the UE supports the code division multiple access transmissions that use the uplink channel and receiving the third indication that the uplink channel supports the code division multiple access transmissions.

2 more elements

Dependencies are inferred from the claim text.