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US 10,314,081 B2Granted
Method of handling time alignment command during a random access procedure
AssigneeInterDigital Patent Holdings, Inc.
InventorsSung-Duck Chun, Seung-June Yi, Sung-Jun Park
Life of this patent
Estimating the term…
Abstract
Disclosed is the radio (wireless) communication system providing a radio communication service and the terminal, and more particularly, a method of handling time alignment command during a random access procedure in an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from the Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system is provided.
Claims12
A user equipment (UE) comprising:
- a receiver;
- a transmitter;
- and
- a processor;
- the receiver and the processor configured to receive a message including a random access preamble index having a first value, wherein the first value indicates that the UE is to select a random access preamble;
- the processor, in response to the received message, further configured to select a random access preamble;
- the processor and the transmitter configured to transmit the selected random access preamble;
- the receiver and the processor further configured to receive a random access response including a timing advance based on the transmitted random access preamble;
- the processor further configured to determine whether a timing alignment timer is running;
- the processor further configured, on a condition that the timing alignment timer is running, to not apply the timing advance;
- and
- the processor further configured, on a condition that the timing alignment timer is not running, to apply the timing advance,
- wherein the receiver and the processor are further configured to receive a second message including a random access preamble index having a second value different than the first value, wherein the second value indicates a preamble that the UE is to transmit.
10 more elements
A method comprising:
- receiving, by a user equipment (UE), a message including a random access preamble index having a first value, wherein the first value indicates that the UE is to select a random access preamble;
- in response to the received message, selecting, by the UE, a random access preamble;
- transmitting, by the UE, the selected random access preamble;
- receiving, by the UE, a random access response including a timing advance based on the transmitted random access preamble;
- determining, by the UE, whether a timing alignment timer is running;
- on a condition that the timing alignment timer is running, not applying, by the UE, the timing advance;
- on a condition that the timing alignment timer is not running, applying, by the UE, the timing advance;
- and
- receiving a second message including a random access preamble index having a second value different than the first value, wherein the second value indicates a preamble that the UE is to transmit.
6 more elements
Dependencies are inferred from the claim text.