Abstract
One embodiment of the present specification provides a method for performing a random access procedure. The method can comprise the steps of: generating a random access preamble to a first cell; generating a random access preamble to a second cell; determining whether the random access preamble to the first cell and the random access preamble to the second cell are triggered so as to be simultaneously transmitted in the same subframe; selecting the random access preamble to any one of the cells according to a pre-set priority when triggered so as to be simultaneously transmitted; and transmitting the any one selected random access preamble.
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration
Product
Use Cases
Wireless communication
Services
Claim
1. A method for performing a random access procedure by a user equipment (UE), the method comprising:
selecting one random access preamble between a first random access preamble and a second random access preamble, if a dual connectivity is configured and if a first subframe of the first random access preamble is overlapped with a second subframe of the second random access preamble;
transmitting the at least one selected random access preamble; and
dropping a transmission of an unselected random access preamble,
wherein the first random access preamble is to be transmitted toward a master cell group (MCG),
wherein the second random access preamble is to be transmitted toward a secondary cell group (SCG), and
wherein if the transmission of the unselected random access preamble is dropped, an indication about a power ramping is delivered to an upper layer.
2. The method of claim 1, wherein the at least one selected random access preamble is for a first cell having a lower cell index.
3. The method of claim 1, wherein the at least one selected random access preamble is for a first cell belonging to the MCG.
4. The method of claim 1, wherein the unselected random access preamble is for a second cell belonging to the SCG.
5. The method of claim 1, further comprising:
delaying a timing for transmitting an unselected random access preamble.
6. The method of claim 1, further comprising:
not incrementing a retransmission counter if the transmission of the unselected random access preamble is dropped at a corresponding transmission timing and is to be retransmitted.
7. A user equipment (UE), comprising:
a processor configured to:
select one random access preamble between a first random access preamble and a second random access preamble, if a dual connectivity is configured and if a first subframe of the first random access preamble is overlapped with a second subframe of the second random access preamble; and
a transceiver configured to
transmit the at least one random access preamble selected by the processor, and
drop a transmission of an unselected random access preamble; and
wherein the first random access preamble is to be transmitted toward a master cell group (MCG),
wherein the second random access preamble is to be transmitted toward a secondary cell group (SCG), and
wherein if the transmission of the unselected random access preamble is dropped, an indication about a power ramping is delivered to an upper layer.
8. The UE of claim 7, wherein the at least one selected random access preamble is for a first cell having a lower cell index.
9. The UE of claim 7, wherein the at least one selected random access preamble is for a first cell belonging to the MCG.
10. The UE of claim 7, wherein the unselected random access preamble is for a second cell belonging to the SCG.
11. The UE of claim 7, wherein the processor is further configured to:
delay a timing for transmitting an unselected random access preamble.
12. The UE of claim 7, wherein the processor is further configured to:
not increment a retransmission counter if the transmission of the unselected random access preamble is dropped at a corresponding transmission timing and is to be retransmitted.
Associated Portfolios
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.