Patent ID: 11882604
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores instructions, and when the instructions are executed by a computer, the instructions cause the computer to perform:
obtaining a round-trip transmission latency (tRTD) of a signal between the computer and a satellite;
obtaining a random access parameter based on the round-trip transmission latency, wherein the random access parameter comprises at least one of tX, tY, tbackoff, or tsubframe, wherein
tX represent a duration between a moment at which the computer sends a random access preamble to the satellite and a moment at which the computer starts to receive a random access response (RAR) from the satellite,
tY represents a duration of a window in which the computer receives the RAR,
tbackoff represents a duration between a moment at which the computer stops receiving the RAR and a moment at which the computer sends the random access preamble again, and
tsubframe represents a subframe duration; and

receiving the RAR based on the random access parameter,
wherein the obtaining the random access parameter comprises one of following a) to d):, a) the random access parameter comprises tX and tY, and tX and tY meet the following condition:

tX<tRTD<tX+tY,, b) the random access parameter comprises tX, tY, and tbackoff, tbackoff and tX, tY, and meet the following condition:

(k+1)(tX+tbackoff)+k(tY)<tRTD<(k+1)(tX+tbackoff+tY),

wherein k represents that the computer receives the RAR for the kth time, and, k
   =
   
    ⌊
    
     
      t
      RTD
     
     
      
       t
       X
      
      +
      
       t
       Y
      
      +
      
       t
       backoff
      
     
    
    ⌋
   
  
  ,, c) the random access parameter comprises tsubframe, and tsubframe meets the following condition:

tX×tsubframe<(min(tRTD),max(tRTD))<(tX+tY)×tsubframe, and, d) the random access parameter further comprises a quantity m of retransmission times of the RAR and a retransmission time interval n of the RAR, and m and n meet the following condition:

2(tX+tY)+tbackoff<m×n+tRTD+X<2(tX+tY+tbackoff),

wherein X represents a duration between a moment at which the satellite receives the preamble and a moment at which the satellite sends the RAR.