US 12,445,987 B2
Ephemeris information acquisition method, indication method, communication node and storage medium
Li Niu, Guangdong (CN); Bo Dai, Guangdong (CN); Xiubin Sha, Guangdong (CN); and Ting Lu, Guangdong (CN)
Assigned to ZTE Corporation, Shenzhen (CN)
Filed by ZTE Corporation, Guangdong (CN)
Filed on Jun. 28, 2023, as Appl. No. 18/215,759.
Application 18/215,759 is a continuation of application No. PCT/CN2022/082527, filed on Mar. 23, 2022.
Claims priority of application No. 202110865071.8 (CN), filed on Jul. 29, 2021.
Prior Publication US 2023/0345396 A1, Oct. 26, 2023
Int. Cl. H04W 56/00 (2009.01); G01S 19/08 (2010.01); H04W 84/06 (2009.01)
CPC H04W 56/0015 (2013.01) [G01S 19/08 (2013.01); H04W 84/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for wireless communication, comprising:
receiving, by a Radio Resource Control (RRC) layer of a user equipment that operates in a satellite network, ephemeris information carried in system information that is broadcasted by a base station, the ephemeris information comprising at least satellite location information;
starting, by the RRC layer of the user equipment, a timer upon receiving the system information;
initiating reacquisition, by the RRC layer of the user equipment depending on an expiry of the timer, of the ephemeris information carried in the system information; and
performing an action based at least on a success status of the reacquisition,
wherein the action comprises informing a Medium Access Control (MAC) layer of the user equipment by the RRC layer that uplink synchronization is achieved upon successful reacquisition of the ephemeris information carried in the system information, and
wherein the action comprises restarting, by the RRC layer of the user equipment, the timer upon an occurrence of any one of a plurality of events, the plurality of events comprising:
(i) detecting, by the MAC layer of the user equipment, an uplink out-of-synchronization event due to a failed reception of the ephemeris information,
(ii) detecting, by the RRC layer of the user equipment, an uplink out-of-synchronization event due to a failed reception of the ephemeris information,
(iii) receiving, by the RRC layer of the user equipment, from the MAC layer of the user equipment, an indication of an uplink out-of-synchronization event due to a failed reception of the ephemeris information,
(iv) receiving, by the RRC layer of the user equipment, from the MAC layer of the user equipment, an instruction to acquire the ephemeris information carried in system information,
(v) sending, by the RRC layer of the user equipment, to the MAC layer of the user equipment, an indication of an uplink out-of-synchronization event due to a failed reception of the ephemeris information, or
(vi) instructing, by the RRC layer of the user equipment, the MAC layer of the user equipment to acquire the ephemeris information carried in system information.