US 11,723,072 B2
Method for transmitting random access response, access network device, and terminal device
Haifeng Yu, Beijing (CN); Xin Xiong, Beijing (CN); Zhenzhen Cao, Beijing (CN); and Xiao Xiao, Beijing (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Feb. 11, 2020, as Appl. No. 16/787,889.
Application 16/787,889 is a continuation of application No. PCT/CN2018/094638, filed on Jul. 5, 2018.
Claims priority of application No. 201710687652.0 (CN), filed on Aug. 11, 2017.
Prior Publication US 2020/0178318 A1, Jun. 4, 2020
Int. Cl. H04W 74/08 (2009.01); H04W 76/11 (2018.01); H04W 72/0446 (2023.01); H04W 80/02 (2009.01); H04W 72/23 (2023.01)
CPC H04W 74/0833 (2013.01) [H04W 72/0446 (2013.01); H04W 72/23 (2023.01); H04W 76/11 (2018.02); H04W 80/02 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method carried out by a terminal device, the method comprising:
receiving a Medium Access Control (MAC) protocol data unit (PDU) sent by an access network device,
wherein the MAC PDU comprises at least two MAC subPDUs which comprise at least one first MAC subPDU, the at least one first MAC subPDU comprises a first MAC subheader and a random access response (RAR) corresponding to the first MAC subheader, and the first MAC subheader is located before and adjacent to the RAR;
parsing an MAC subheader comprised in each MAC subPDU; and
determining an MAC subPDU corresponding to the terminal device according to a result of parsing the MAC subheader,
wherein the at least two MAC subPDUs further comprise a third MAC subPDU which comprises only a third MAC subheader, the third MAC subheader comprises backoff indicator (BI) information instructing the terminal device to determine a time interval to initiate a next random access request, based on no random access preamble identifier (RAPID) that is the same as a RAPID sent by the terminal device being present in a detected MAC PDU;
wherein based on a RAPID having more than 6 bits, a plurality of RAPIDS in a group MAC subheader are concatenated to reduce bit overhead;
wherein different backoff indicators (BIs) correspond to different random access priorities, and wherein a smaller BI associated with a shorter waiting time required for a re-initiating random access corresponds to a higher priority; and
wherein a priority is determined based on quality of service (QoS) of a random access initiated by the terminal device, wherein a random access with higher QoS is associated with a higher priority.