Systems and methods for supporting URLLC service in 5G NR
View Patent ↗A 5G new radio (NR) Base Station (gNB) is described. The gNB includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to receive one or more indications for data availability generated by an ultra-reliable low-latency communication (URLLC)-based logical channel group (LCG) in a 5G NR buffer status report (BSR), a specific numerology-based LCG in a 5G NR BSR, or a URLLC operating in a specific numerology using a 5G NR BSR.
1. A 5G new radio (NR) Base Station (gNB), comprising:
a processor; and
memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
assign dedicated resources to a user equipment (UE), wherein the dedicated resources include grant-free resources sized to accommodate only a buffer status report (B SR) size, wherein the grant-free resources allow only buffer status reporting corresponding to elevated priority traffic, and wherein the grant-free resources allow data transfer when there is no pending BSR;
receive a 5G NR BSR triggered based on a number of padding bits, wherein the 5G NR BSR is a grant-free transmission on the grant-free resources without communication of a corresponding scheduling request (SR); and
receive one or more indications for data availability generated by
an ultra-reliable low-latency communication (URLLC) operating in a specific numerology using the 5G NR BSR.
2. The gNB of claim 1 , wherein the instructions are further executable to:
process a bandwidth request on highest priority;
allocate enough bandwidth for the bandwidth request; and
pre-empt any services grants if necessary, wherein granting the bandwidth request preempts granting any other pending bandwidth requests if necessary to grant the bandwidth request.
3. The gNB of claim 1 , wherein a URLLC flag is included in a medium access control (MAC) Control Element (CE) using Logical Channel Groups at a beginning or end of the MAC CE to achieve backward compatibility.
4. The gNB of claim 1 , wherein a URLLC flag is received in a new MAC Control Element with new logical channel IDs at a beginning or end of a frame.
5. The gNB of claim 1 , wherein a URLLC flag is included in a logical channel configuration information element to indicate attributes of URLLC services.
6. The gNB of claim 5 , wherein the URLLC flag is included in the logical channel configuration information element when performing an RRCConnectionRequest message or procedure.
7. The gNB of claim 5 , wherein the URLLC flag is included in the logical channel configuration information element when performing an RRCConnectionResumeRequest message or procedure.
8. The gNB of claim 5 , wherein the URLLC flag is included in the logical channel configuration information element when performing an RRCConnectionReconfiguration message or procedure.
9. The gNB of claim 5 , wherein the URLLC flag is included in the logical channel configuration information element when performing an RRCConnectionReestablishmentRequest message or procedure.
10. A 5G new radio (NR) user equipment (UE), comprising:
a processor; and
memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
receive an assignment of dedicated resources to the UE, wherein the dedicated resources include grant-free resources sized to accommodate only a buffer status report (BSR) size, wherein the grant-free resources allow only buffer status reporting corresponding to elevated priority traffic, and wherein the grant-free resources allow data transfer when there is no pending BSR;
trigger a 5G NR BSR based on a number of padding bits, wherein the 5G NR BSR is a grant-free transmission on the grant-free resources without communication of a corresponding scheduling request (SR);
use a bitmap to indicate high priority logical channel groups (LCGs); and
send one or more indications for data availability generated by
an ultra-reliable low-latency communication (URLLC) operating in a specific numerology using the 5G NR BSR.
11. The UE of claim 10 , wherein the instructions are further executable to:
receive a grant for the URLLC; and
send URLLC data from an LCG according to its priority.
12. The UE of claim 10 , wherein the bitmap is included in a BSR medium access control (MAC) Control Element (CE) to indicate Logical Channel Groups.
13. The UE of claim 10 , wherein the bitmap is sent in a new NR BSR MAC Control Element as logical channel group IDs.
14. The UE of claim 10 , wherein a URLLC flag is included in a logical channel configuration information element to indicate attributes of URLLC services.
15. The UE of claim 14 , wherein the URLLC flag is included in the logical channel configuration information element when performing an RRCConnectionRequest message or procedure.
16. The UE of claim 14 , wherein the URLLC flag is added to the logical channel configuration information element when performing an RRCConnectionResumeRequest message or procedure.
17. The UE of claim 14 , wherein the URLLC flag is included in the logical channel configuration information element when performing an RRCConnectionReconfiguration message or procedure.
18. The UE of claim 14 , wherein the URLLC flag is included in the logical channel configuration information element when performing an RRCConnectionReestablishmentRequest message or procedure.