Physical random access channel (PRACH) transmission in multicarrier operation

A wireless communications apparatus, comprising:

• at least one processor configured to:
• determine an uplink carrier to be used by a user equipment (UE) for random access from among multiple uplink carriers;
• determine, at the UE, one or more parameters for identifying one or more downlink carriers for random access;
• transmit, from the UE, a random access signal via the determined uplink carrier utilizing the one or more parameters for identifying the one or more downlink carriers for random access by a base station;
• and
• receive, at the UE, a random access response via at least one of the one or more downlink carriers identifiable by the one or more parameters by the base station;
• and
• a memory coupled to the at least one processor.

A wireless communications apparatus selects an uplink carrier for random access, comprising:

• means for determining an uplink carrier to be used by a user equipment (UE) for random access from among multiple uplink carriers;
• means for determining, at the UE, one or more parameters for identifying one or more downlink carriers for random access;
• means for transmitting, from the UE, a random access signal via the determined uplink carrier utilizing the one or more parameters for identifying the one or more downlink carriers for random access by a base station;
• and
• means for receiving, at the UE, a random access response via at least one of the one or more downlink carriers identifiable by the one or more parameters by the base station.

A computer program product, comprising:

• a non-transitory computer-readable medium comprising:
• code for causing at least one computer to determine an uplink carrier to be used by a user equipment (UE) for random access from among multiple uplink carriers;
• code for causing at least one computer to determine, at the UE, one or more parameters for identifying one or more downlink carriers for random access;
• code for causing at least one computer to transmit, from the UE, a random access signal via the determined uplink carrier utilizing the one or more parameters for identifying the one or more downlink carriers for random access by a base station;
• and
• code for causing at least one computer to receive, at the UE, a random access response via at least one of the one or more downlink carriers identifiable by the one or more parameters by the base station.

A method for wireless communication that facilitates performing random access for multiple carriers in a wireless environment, comprising:

• determining one or more parameters for identifying one or more downlink carriers for random access;
• receiving a random access signal for a user equipment (UE) via an uplink carrier, wherein the uplink carrier is determined among multiple uplink carriers and the random access signal includes at least one of the one or more parameters for identifying the one or more downlink carriers for random access by a base station;
• identifying at least one of the one or more downlink carriers for random access based upon the one or more received parameters for identifying the one or more downlink carriers for random access;
• and
• transmitting a random access response on the at least one or more identified downlink carriers for random access.

A wireless communications apparatus, comprising:

• at least one processor configured to:
• determine one or more parameters for identifying one or more downlink carriers for random access;
• receive a random access signal for a user equipment (UE) via an uplink carrier, wherein the uplink carrier is determined among multiple uplink carriers and the random access signal includes at least one of the one or more parameters for identifying the one or more downlink carriers for random access by the wireless communications apparatus;
• identify at least one of the one or more downlink carriers for random access based upon the one or more received parameters for identifying the one or more downlink carriers for random access;
• and
• transmit a random access response on the at least one or more identified downlink carrier for random access;
• and
• a memory coupled to the at least one processor.

A wireless communications apparatus that performs random access for multiple carriers in a wireless environment, comprising:

• means for determining one or more parameters for identifying one or more downlink carriers for random access;
• means for receiving a random access signal for a user equipment (UE) via an uplink carrier, wherein the uplink carrier is determined among multiple uplink carriers and the random access signal includes at least one of the one or more parameters for identifying the one or more downlink carriers for random access by the wireless communications apparatus;
• means for identifying at least one of the one or more downlink carriers for random access based upon the one or more received parameters for identifying the one or more downlink carriers for random access;
• and
• means for transmitting a random access response on the at least one or more identified downlink carriers for random access.

A computer program product, comprising:

• a non-transitory computer-readable medium comprising:
• code for causing at least one computer to determine one or more parameters for identifying one or more downlink carriers for random access;
• code for causing at least one computer to receive a random access signal for a user equipment (UE) via an uplink carrier, wherein the uplink carrier is determined among multiple uplink carriers and the random access signal includes at least one of the one or more parameters for identifying the one or more downlink carriers for random access by a base station;
• code for causing at least one computer to identify at least one of the one or more downlink carriers for random access based upon the one or more received parameters for identifying the one or more downlink carriers for random access;
• and
• code for causing at least one computer to transmit a random access response on the at least one or more identified downlink carriers for random access.