FIG. 25 shows example associations/mappings between one or more random access preamble indicators/indices 2504 and a plurality of antenna panels 2508 at a wireless device (e.g., the wireless device 2408). The one or more random access preamble indicators/indices 2504 may comprise a preamble index 1, a preamble index 2, . . . , a preamble index K. The plurality of antenna panels 2508 may comprise antenna panel 1, . . . , antenna panel N. One or more configuration parameters (e.g., the one or more configuration parameters 2412) may indicate the associations/mappings. The associations may be one to one (e.g., preamble index j may be associated with (or mapped to) an antenna panel n and may not be associated with (or mapped to) an antenna panel m that is different than Antenna panel n). The associations may be many to one (e.g., preamble index 1 and preamble index 2 may be associated with (or mapped to) antenna panel 1; preamble index K?1 and preamble index K may be associated with (or mapped to) Antenna panel N). The associations may be one to many. The wireless device may send/transmit a random access preamble via antenna panel 1 associated with (or mapped to) the preamble index 1 in a PDCCH order (e.g., the PDCCH order 2420), for example, if the wireless device receives the PDCCH order comprising preamble index 1. The wireless device may send/transmit a random access preamble via antenna panel N associated with (or mapped to) the preamble index K in a PDCCH order, for example, if the wireless device receives a PDCCH order comprising preamble index K. A random access preamble index of the one or more random access preamble indices 2504 being associated with (or mapped to) an antenna panel of the plurality of antenna panels 2508 may comprise that the random access preamble index is associated with (or mapped to) a panel index of the antenna panel. One or more configuration parameters (e.g., the one or more configuration parameters 2412) may indicate the panel index for the random access preamble index. The one or more configuration parameters may associate (or map) the panel index with (or to) the random access preamble index. The panel indices may comprise the panel index.
