Techniques for random access communication support using remotely-located nodes in a wireless network
Aspects described herein relate to sending, from a distributed unit (DU), a control signal that is transparent to communications on an uplink data channel and a random access channel, receiving, at the DU, a signal from a radio unit (RU) over resources for the random access channel, and decoding a random access communication from the signal at least in part by applying a phase compensation to the signal.
1 . An apparatus for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, wherein the one or more processors are configured to cause the apparatus to:
send, to a radio unit (RU), a downlink control plane message of section type 1 for a random access channel with a same numerology as an uplink data channel; and
receive a signal from the RU over resources for the random access channel.
2 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to:
decode a random access communication from the signal at least in part by applying a phase compensation to the signal, wherein the signal received from the RU has a cyclic prefix associated with the uplink data channel removed, and wherein the phase compensation is based on the cyclic prefix.
3 . The apparatus of claim 2 , wherein the phase compensation is based on a phase difference between the cyclic prefix of uplink shared channel and a second cyclic prefix associated with the random access channel.
4 . The apparatus of claim 1 , wherein the downlink control plane message includes one or more parameters for receiving a random access communication at the RU.
5 . The apparatus of claim 1 , wherein the signal received from the RU has a Fast Fourier Transform (FFT) applied.
6 . The apparatus of claim 1 , wherein the downlink control plane message of section type 1 indicates the resources.
7 . A method of wireless communication performed by a distributed unit (DU), comprising:
sending, to a radio unit (RU), a downlink control plane message of section type 1 for a random access channel with a same numerology as an uplink data channel; and
receiving a signal from the RU over resources for the random access channel.
8 . The method of claim 7 , further comprising:
decoding a random access communication from the signal at least in part by applying a phase compensation to the signal, wherein the signal received from the RU has a cyclic prefix associated with the uplink data channel removed, and wherein the phase compensation is based on the cyclic prefix.
9 . The method of claim 8 , wherein the phase compensation is based on a phase difference between the cyclic prefix of uplink shared channel and a second cyclic prefix associated with the random access channel.
10 . The method of claim 7 , wherein the downlink control plane message includes one or more parameters for receiving a random access communication at the RU.
11 . The method of claim 7 , wherein the signal received from the RU has a Fast Fourier Transform (FFT) applied.
12 . The method of claim 7 , wherein the downlink control plane message of section type 1 indicates the resources.
13 . A non-transitory computer-readable storage medium having instructions stored thereon that, when executed by an apparatus, causes the apparatus to:
send, to a radio unit (RU), a downlink control plane message of section type 1 for a random access channel with a same numerology as an uplink data channel; and
receive a signal from the RU over resources for the random access channel.
14 . The non-transitory computer-readable storage medium of claim 13 , wherein the instructions, when executed, further cause the apparatus to:
decode a random access communication from the signal at least in part by applying a phase compensation to the signal, wherein the signal received from the RU has a cyclic prefix associated with the uplink data channel removed, and wherein the phase compensation is based on the cyclic prefix.
15 . The non-transitory computer-readable storage medium of claim 14 , wherein the phase compensation is based on a phase difference between the cyclic prefix of uplink shared channel and a second cyclic prefix associated with the random access channel.
16 . The non-transitory computer-readable storage medium of claim 13 , wherein the downlink control plane message of section type 1 indicates the resources.
17 . An apparatus for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, wherein the one or more processors are configured to cause the apparatus to:
send, to a radio unit (RU), a downlink control plane message of section type 1 for a random access channel with a same numerology as an uplink data channel; and
receive a signal from the RU over resources for the random access channel, wherein the downlink control plane message of section type 1 indicates the resources.