| CPC H04W 48/14 (2013.01) [H04W 48/16 (2013.01); H04W 56/001 (2013.01); H04W 76/27 (2018.02)] | 16 Claims |

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1. A method for wireless communication, comprising:
receiving, by a terminal, a first message including a pre-configured transmission resource configuration from a communication node, the first message further including a pre-configured transmission resource release instance including a counter configured to count a number of continuous inactivity of a pre-configured transmission resource associated with the pre-configured transmission resource configuration;
determining, by the terminal, that a timing advance (TA) is valid based on a Reference Signal Received Power (RSRP) change threshold and a TA validity timer; and
transmitting, by the terminal, a second message using a pre-configured transmission resource associated with the pre-configured transmission resource configuration based on the determining that the TA is valid, and
wherein the determining is further based on an RSRP change and the determining comprises:
setting an RSRP of a serving cell as a reference RSRP, in response to receiving, by the terminal, at least one of the pre-configured transmission resource configuration and a TA update indication; and
determining the RSRP change based on a difference between a measured RSRP value of the serving cell and the reference RSRP, and
wherein the method further comprises:
making, by the terminal, a comparison between the number of continuous inactivity of the pre-configured transmission resource and the pre-configured transmission resource release instance; and
releasing, by the terminal, the pre-configured transmission resource based on the comparison.
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