Random-access and scheduling-request in new radio-things sidelink
Embodiments of a system and method for random access and scheduling request for new radio things sidelink are generally described herein. In some embodiments, a nUE (network user equipment) schedules a RA (random access) resource in a control channel. The nUE decodes a TAS (transmitter resource acquisition and sounding) payload, received from a wUE (wearable user equipment) in a PRB (physical resource block) addressed to a RA-ID (random access identifier) associated with the nUE. The nUE encodes, in response to decoding the TAS payload, a RAS (receiver resource acknowledgement and sounding) payload in the PRB. The nUE decodes initial access content received via a data channel from the wUE, the initial access content including a pro posed temp ID (temporary identifier) for addressing the wUE. The nUE encode, in response to the initial access content, an ACK (acknowledgement), addressed to the wUE, to accept initial access of the wUE.
1. An apparatus of a network user equipment (nUE), the apparatus comprising:
processing circuitry; and memory, the processing circuitry to:
schedule a RA (random access) resource in a control channel;
decode, in response to scheduling the RA resource, a TAS (transmitter resource acquisition and sounding) payload, received from a wUE (wearable user equipment) in a PRB (physical resource block) addressed to a RA-ID (random access identifier) associated with the nUE;
encode, in response to decoding the TAS payload, a RAS (receiver resource acknowledgement and sounding) payload in the PRB;
decode initial access content received via a data channel from the wUE, the initial access content including a proposed temp ID (temporary identifier) for addressing the wUE;
encode, in response to the initial access content, an ACK (acknowledgement), addressed to the wUE, to accept initial access of the wUE; and
switch a subframe from downlink to uplink.
2. The apparatus of claim 1 , wherein the processing circuitry is further to:
schedule the wUE in a next available subframe by addressing to the proposed temp ID for addressing the wUE in the initial access content;
if the proposed temp ID is acceptable to the nUE: assign the proposed temp ID as the temp ID for addressing the wUE; and
if the proposed temp ID is not acceptable to the nUE: assign a new temp ID to the wUE and encode for transmission of the new temp ID as a RRC (radio resource control) signal in the control channel.
3. The apparatus of claim 2 , wherein the processing circuitry is further to:
encode instructions for initiating of a downlink or uplink data transmission between the nUE and the wUE.
4. The apparatus of claim 1 , the TAS payload being encoded based on scheduling information in the control channel.
5. The apparatus of claim 1 , the RAS payload being scrambled with the RA-ID, and the TAS payload being scrambled with the RA-ID.
6. The apparatus of claim 1 , wherein the RA-ID is associated with the nUE and a plurality of wUEs, including the wUE.
7. The apparatus of claim 1 , wherein the processing circuitry comprises a baseband processor.
8. The apparatus of claim 1 , further comprising transceiver circuitry to:
receive the TAS payload;
transmit the RAS payload;
receive the initial access content; and
transmit the ACK.
9. The apparatus of claim 8 , further comprising an antenna coupled with the transceiver circuitry.
10. An apparatus of a wearable user equipment (wUE), the apparatus comprising:
processing circuitry; and memory, the processing circuitry to:
decode a scheduled RA (random access) resource in a control channel from a nUE (network user equipment);
encode for transmission to the nUE, in response decoding to the scheduled RA resource, a TAS (transmitter resource acquisition and sounding) payload based on resource scheduling information in the control channel, the TAS payload being encoded within a PRB (physical resource block) addressed to a RA-ID (RA identifier);
decode a feedback RAS (receiver resource acknowledgement and sounding) payload within the PRB addressed to the RA-ID from the nUE;
encode for transmission to the nUE, in response to decoding the feedback RAS payload, a scheduling request in a data channel;
decode an ACK (acknowledgement) payload from the nUE accepting the scheduling request; and
schedule, in response to decoding the ACK, an uplink transmission to the nUE wherein the nUE is associated with the RA-ID in a next available uplink subframe.
11. The apparatus of claim 10 , wherein the RA-ID is associated with the nUE and a plurality of wUEs, including the wUE.
12. The apparatus of claim 10 , wherein the RA-ID is identified in the decoded RA resource, and wherein control information is scrambled with the RA-ID.
13. The apparatus of claim 10 , wherein the processing circuitry is further to:
select, from among a plurality of PRBs scheduled for RA transmission, the PRB for encoding the TAS payload.
14. The apparatus of claim 10 , wherein the processing circuitry is further to:
encode, within the scheduling request, a temp ID for addressing the wUE.
15. The apparatus of claim 14 , wherein the ACK payload is scrambled with the temp ID for addressing the wUE.
16. The apparatus of claim 10 , wherein the processing circuitry is further to:
encode for transmission, user data together with the scheduling request.
17. The apparatus of claim 10 , wherein the processing circuitry is further to switch a subframe from downlink to uplink.
18. A non-transitory machine-readable medium storing instructions for execution by processing circuitry of a network user equipment (nUE), the instructions causing the processing circuitry to:
schedule a RA (random access) resource in a PRB (physical resource block) in a control channel;
decode, in response to scheduling the RA resource, a RAS (receiver resource acknowledgement and sounding) payload received from a wUE (wearable user equipment) in the PRB in which the RA resource was scheduled; and
switch, in response to the RAS payload, a subframe from downlink to uplink to allow the wUE to transmit mission critical data.
19. The non-transitory machine-readable medium of claim 18 , wherein the PRB in the control channel is generated from a RA-ID (RA identifier), and wherein control information is scrambled with the RA-ID.
20. The non-transitory machine-readable medium of claim 18 , wherein the RAS payload carries a RA indication, and wherein the RAS payload is scrambled with a RA-ID (RA identifier).