	US 11,895,495 B2
	Enhanced security for access stratum transmission
Xiangying Yang, Cupertino, CA (US); Elliot S. Briggs, Santa Cruz, CA (US); Samuel D. Post, San Jose, CA (US); Yannick L. Sierra, San Francisco, CA (US); Fangli Xu, Beijing (CN); Dawei Zhang, Saratoga, CA (US); Haijing Hu, Beijing (CN); Huarui Liang, Beijing (CN); Li Li, Los Altos, CA (US); Lijia Zhang, Beijing (CN); Shu Guo, Beijing (CN); and Yuqin Chen, Shenzhen (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/057,622
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Jun. 22, 2018, PCT No. PCT/CN2018/092396 § 371(c)(1), (2) Date Nov. 20, 2020, PCT Pub. No. WO2019/241999, PCT Pub. Date Dec. 26, 2019.
Prior Publication US 2021/0204129 A1, Jul. 1, 2021
Int. Cl. H04W 12/069 (2021.01); H04W 76/27 (2018.01); H04W 12/73 (2021.01); H04W 12/108 (2021.01); H04W 74/08 (2009.01)

CPC H04W 12/069 (2021.01) [H04W 12/108 (2021.01); H04W 12/73 (2021.01); H04W 74/0833 (2013.01); H04W 76/27 (2018.02)]

20 Claims

1. A user equipment device (UE), comprising:

at least one radio;

a memory; and

at least one processor communicatively coupled to the at least one radio and the memory;

wherein the at least one radio, the memory, and the at least one processor are configured cause the UE to:

operate in an idle mode;

while operating in the idle mode, receive an authentication message from a base station as part of an initiation of a connection procedure, wherein the authentication message is a broadcast message comprised within a special system information block (SIB) transmitted from the base station;

determine whether a signature comprised within the authentication message is valid, wherein the signature is determined from content of the special SIB and at least one other broadcast message; and

continue the connection procedure with the base station based on a determination that the signature is valid.