×

Uplink Timing Maintenance Upon Time Alignment Timer Expiry

  • US 20140086219A1
  • Filed: 02/19/2013
  • Published: 03/27/2014
  • Est. Priority Date: 09/27/2012
  • Status: Active Grant
First Claim
Patent Images

1. A method for controlling uplink transmission timing of a wireless communications network, the network comprising a base station and a User Equipment (UE), the method comprising:

  • applying a first timing advance command to adjust uplink transmission timing;

    determining a time limit, the time limit identifying an amount of time elapsed, relative to an expiration of a time alignment timer (TAT), until an estimated uplink transmission error exceeds a timing error limit; and

    determining whether to use a second timing advance command to resume uplink synchronization based on the determined time limit.

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×