US 12,477,584 B2
Transmission of preamble and payload messages in random access procedures
Zhihong Qiu, Shenzhen (CN); He Huang, Shenzhen (CN); and Eswar Kalyan Vutukuri, Shenzhen (CN)
Assigned to ZTE Corporation, Shenzhen (CN)
Filed by ZTE CORPORATION, Guangdong (CN)
Filed on Aug. 12, 2022, as Appl. No. 17/887,040.
Application 17/887,040 is a continuation of application No. PCT/CN2020/075093, filed on Feb. 13, 2020.
Prior Publication US 2022/0386385 A1, Dec. 1, 2022
Int. Cl. H04W 72/04 (2023.01); H04W 74/0833 (2024.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)] 15 Claims
OG exemplary drawing
 
1. A method, comprising:
transmitting, by a wireless communication device in a random access (RA) procedure, a RA preamble and a corresponding uplink channel payload to a wireless communication node;
receiving, by the wireless communication device from the wireless communication node, a fallback RA response (RAR) including an uplink grant, a current new data indicator (NDI), and a redundant version (RV) for the corresponding uplink channel payload, wherein the RA procedure comprises a contention free RA (CFRA) procedure;
comparing, by the wireless communication device, the current NDI value received in the fallback RAR with a previous NDI value;
establishing, by the wireless communication device, a medium access control (MAC) protocol data unit (PDU) based on a MsgA buffer and the current NDI value, wherein the corresponding uplink channel payload is based on the MsgA buffer; and
transmitting, by the wireless communication device to the wireless communication node, the corresponding uplink channel payload of the RA procedure using the MAC PDU through the uplink grant and the RV of the fallback RAR according to whether the current NDI value is different from the previous NDI value.