System and Method for Random Access Backoffs
AssigneeFuturewei Technologies, Inc.
InventorsBin Liu, Yongbo Zeng, Jian Wang, Guorong Li, Yu Cai
Life of this patent
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Abstract
A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from o to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.
Claims21
A method for performing a random access procedure, the method comprises:
- randomly selecting, by a user equipment (UE), a backoff time from within a backoff window ranging from 0 to a specified multiple of a random access preamble unit;
- waiting, by the UE, until a time initialized with the backoff time expires;
- and
- retransmitting, by the UE, a random access preamble.
A method for performing a random access procedure, the method comprises:
- determining, by an evolved NodeB (eNB), a backoff parameter value in accordance with a random access preamble unit associated with a user equipment (UE) participating in the random access procedure;
- signaling, by the eNB, an indicator of the backoff parameter value;
- and
- receiving, by the eNB, a random access preamble in accordance with the backoff parameter value.
A method for transmitting a random access preamble, the method comprising:
- generating, by a user equipment (UE), the random access preamble;
- and
- when a number of physical random access channel (PRACH) repetitions per attempt is larger than a threshold,
- segmenting, by the UE, the random access preamble into a plurality of blocks, and
- separately transmitting, by the UE, each of the plurality of blocks.
A non-transitory computer-readable medium storing programming for execution by at least one processor, the programming including instructions to:
- randomly select a backoff time from within a backoff window ranging from 0 to a specified multiple of a random access preamble unit;
- wait until a time initialized with the backoff time expires;
- and
- retransmit a random access preamble.
Dependencies are inferred from the claim text.