Method of configuring timing advance group and/or value of time alignment timer
AssigneeAlcatel Lucent
InventorsTao Yang, Seau Sian Lim
Life of this patent
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Abstract
The invention proposes a method, of configuring a timing advance group for a secondary cell, in a base station, a method, of configuring a value of a time alignment timer for a secondary cell, in a base station, a method of configuring a value of a time alignment timer in a user equipment, and a method of configuring a timing advance group in a user equipment.
Claims15
A method, of configuring a timing advance group for a secondary cell, in a base station, the method comprising:
- triggering a random access procedure of a user equipment over the secondary cell;
- obtaining a timing advance value of the user equipment over the secondary cell according to a result of the random access procedure of the user equipment over the secondary cell;
- and
- determining a final timing advance group to which the secondary cell belongs according to the timing advance value.
A method, of configuring a timing advance group for a secondary cell, in a base station, the method comprising:
- determining whether a timing advance value is valid for a primary cell and the secondary cell;
- and
- creating a new timing advance group for the secondary cell, if the timing advance value is invalid for the primary cell and valid for the secondary cell.
A method, of configuring a value of a time alignment timer for a secondary cell, in a base station, the method comprising:
- transmitting the value of the time alignment timer to a user equipment via a radio link control message;
- including and transmitting to the use equipment the value of the time alignment timer in a physical random access procedure;
- and
- including and transmitting to the use equipment the value of the time alignment timer in media access control layer control signaling.
A method, of configuring a value of a time alignment timer in a user equipment, the method comprising:
- receiving a value of a new time alignment timer from a base station;
- determining whether there is a currently operating time alignment timer;
- and
- if there is the currently operating time alignment timer, then disabling the currently operating time alignment timer and operating the new time alignment timer;
- or
- waiting for the termination of the operation of the currently operating time alignment timer and operating the new time alignment timer after the termination.
A method of configuring a timing advance group in a user equipment, the method comprising:
- receiving a new timing advance group identifier from a base station;
- determining whether an identifier of a timing advance group to which the user equipment currently belongs is consistent with the new timing advance group identifier;
- and
- replacing the identifier of the timing advance group currently belonging to with the new timing advance group identifier, if not consistent.
Dependencies are inferred from the claim text.