Patent ID: 11937293
Assignee: ZTE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A method performed by a communication node, comprising:
transmitting system information to a communication device, wherein the communication node communicates using a satellite in orbit or a high altitude platform station (HAPS),
wherein the communication device is configured to determine the start of a random access response window and monitor for a signal from the communication node within the random access response window, wherein the communication device determines the start of the random access response window by performing a process using the system information, the process comprising:
determining a minimum propagation delay, delay min, for communications between the communication device and the communication node, based on the system information; or
determining a propagation delay, delay calc, for communications between the communication device and the communication node, based on the system information and situation information, wherein the random access response window:
starts from T2+delay min*2, where T1 is a Message 1 transmission finish time of the communication device, if the communication device does not have access to situation information; or
starts from T1+delay calc*2, where T1 is a Message 1 transmission finish time of the communication device, if the communication device has access to situation information, wherein the situation information comprises at least one of:
a location of the communication device,
an ephemeris of the satellite, or
a trajectory of the HAPS, or
a payload type of the satellite or the HAPS.