Communication device and wireless communication system for handling random access procedure
First Claim
1. A communication device of a wireless communication system for handling a random access procedure, the communication device comprising:
- a processor, for executing a program; and
a memory, coupled to the processor, for storing the program which instructs the processor to perform the following steps;
receiving a configuration message for the random access procedure from a network of the wireless communication system, wherein the configuration message configures the communication device to transmit a first random access preamble;
performing a clear channel assessment (CCA) or listen before talk (LBT) operation before transmitting the first random access preamble; and
increasing a preamble transmission counter of the first random access preamble by 1 every time when performing the CCA or LBT operation, irrespective of whether the first random access preamble is allowed to be transmitted.
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Accused Products
Abstract
A communication device of a wireless communication system for handling a random access procedure includes a processing means and a storage unit. The processing means is used for executing a program. The storage unit, coupled to the processing means, is used for storing the program which instructs the processing means to perform the following steps: receiving a configuration message for the random access procedure from a network of the wireless communication system, wherein the configuration message configures the communication device to transmit a first random access preamble; performing a clear channel assessment (CCA) or listen before talk (LBT) operation before transmitting the first random access preamble; and increasing a preamble transmission counter of the first random access preamble by 1 when performing the CCA or LBT operation.
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Citations
20 Claims
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1. A communication device of a wireless communication system for handling a random access procedure, the communication device comprising:
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a processor, for executing a program; and a memory, coupled to the processor, for storing the program which instructs the processor to perform the following steps; receiving a configuration message for the random access procedure from a network of the wireless communication system, wherein the configuration message configures the communication device to transmit a first random access preamble; performing a clear channel assessment (CCA) or listen before talk (LBT) operation before transmitting the first random access preamble; and increasing a preamble transmission counter of the first random access preamble by 1 every time when performing the CCA or LBT operation, irrespective of whether the first random access preamble is allowed to be transmitted. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communication device of a wireless communication system for handling a random access procedure, the communication device comprising:
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a processor, for executing a program; and a memory, coupled to the processor, for storing the program which instructs the processor to perform the following steps; receiving a configuration message for the random access procedure from a network of the wireless communication system, wherein the configuration message configures the communication device to transmit a first random access preamble; starting a timer with a timer value when starting to perform a clear channel assessment (CCA) or listen before talk (LBT) operation before transmitting the first random access preamble, irrespective of whether the first random access preamble is allowed to be transmitted and the first random access preamble is successfully transmitted; and stopping the timer when receiving a random access response corresponding to the first random access preamble, or determining that the random access procedure is not successfully completed and terminating the random access procedure when the timer expires. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A wireless communication system for handling a random access procedure, the wireless communication system comprising a network and a communication device, the network comprising:
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a first processor, for executing a first program; and a first memory, coupled to the first processor, for storing the first program which instructs the first processor to perform the following steps; transmitting a configuration message to the communication device for a random access procedure; starting a first timer with a first timer value; and determining that the random access procedure is not successfully completed when failing to receive a first random access preamble before the first timer expires; and the communication device comprising; a second processor, for executing a second program; and a second memory, coupled to the second processor, for storing the second program which instructs the second processor to perform the following steps; receiving the configuration message from the network, wherein the configuration message configures the communication device to transmit the first random access preamble; starting a second timer with a second timer value when starting to perform a clear channel assessment (CCA) or listen before talk (LBT) operation before transmitting the first random access preamble, to be transmitted and the first random access preamble is successfully transmitted; and stopping the second timer when receiving a random access response corresponding to the first random access preamble, or determining that the random access procedure is not successfully completed and terminating the random access procedure when the second timer expires. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification