CPC H04W 74/0833 (2013.01) [H04W 72/23 (2023.01)] | 21 Claims |
1. A data transmission method, comprising:
sending, by a terminal, a random access preamble to a base station, and receiving, by the terminal, a random access response sent by the base station; and
sending, by the terminal, a first request message carrying uplink data to the base station;
wherein the sending, by the terminal, the random access preamble to the base station comprises: in response to determining that the terminal satisfies a first preset condition, sending, by the terminal, the random access preamble for requesting an uplink data transmission resource to the base station;
wherein the method further comprising one of:
failing to receive, by the terminal, a second response message returned by the base station;
receiving, by the terminal, the second response message carrying an uplink data failure indication or an uplink data retransmission indication returned by the base station; or
in response to determining that the terminal fails to receive the random access response returned by the base station, determining, by the terminal, a random access failure and reinitiating, by the terminal, random access; and
wherein the reinitiating, by the terminal, the random access comprises:
determining, by the terminal, to select one of the random access preamble for requesting the uplink data transmission resource or the random access preamble not for requesting the uplink data transmission resource to perform the random access according to at least one of:
a number of random access failures, a serial number of each random access failure; a downlink measurement obtained by the terminal; a coverage level; or a number of repetitions.
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