Wireless Device Processes With Bandwidth Part Switching
US-2019132857-A1 · May 2, 2019 · US
Methods for supplementary uplink access in wireless systems
US12526753B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12526753-B2 |
| Application number | US-201816763628-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 15, 2018 |
| Priority date | Nov 15, 2017 |
| Publication date | Jan 13, 2026 |
| Grant date | Jan 13, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A method performed by a WTRU may comprise transmitting, to a gNB, a first random access preamble on a first physical random access channel (PRACH) resource of a first uplink (UL) carrier and determining that the transmission on the first PRACH resource is unsuccessful. The method may further comprise determining that a maximum number of random access retransmissions on the first UL carrier is met and in response, the WTRU may transmit, to the gNB on a second UL carrier, a third random access preamble on a third PRACH resource. The WTRU may determine an RA-RNTI for a second UL carrier at least in part by a carrier offset. The WTRU may monitor for a random access response (RAR) based on the RA-RNTI.
First claim
Opening claim text (preview).
What is claimed is: 1 . A wireless transmit/receive unit (WTRU) comprising a processor and memory, the processor and memory configured to: attempt to acquire a channel on a first bandwidth part (BWP); determine that the attempt to acquire the channel on the first BWP was unsuccessful based on a maximum number of unsuccessful access attempts being reached for the first BWP; switch, based on at least the maximum number of unsuccessful access attempts being reached for the first BWP, from the first BWP associated with the uplink carrier to a second BWP associated with the same uplink carrier, the first BWP being a different BWP than the second BWP for the same uplink carrier; transmit a random access (RA) preamble via the second BWP associated with the same uplink carrier after the maximum number of unsuccessful access attempts is reached for the first BWP; and receive a random access response (RAR) in response to the RA preamble transmitted via the second BWP. 2 . The WTRU of claim 1 , wherein the channel is associated with a primary cell. 3 . The WTRU of claim 1 , wherein a RAR is received. 4 . The WTRU of claim 1 , wherein the channel is a channel of an unlicensed spectrum. 5 . The WTRU of claim 1 , wherein the unsuccessful access attempts comprise an unsuccessful attempt of a random access transmission. 6 . A method performed by a wireless transmit/receive unit (WTRU), the method comprising: attempting to acquire a channel on a first bandwidth part (BWP); determining that the attempt to acquire the channel on the first BWP was unsuccessful based on a maximum number of unsuccessful access attempts being reached for the first BWP; switching, based on at least the maximum number of unsuccessful access attempts being reached for the first BWP, from the first BWP associated with the uplink carrier to a second BWP associated with the same uplink carrier, the first BWP being a different BWP than the second BWP for the same uplink carrier; transmitting a random access (RA) preamble via the second BWP associated with the same uplink carrier after the maximum number of unsuccessful access attempts is reached for the first BWP; and receiving a random access response (RAR) in response to the RA preamble transmitted via the second BWP. 7 . The method of claim 6 , wherein the channel is associated with a primary cell. 8 . The method of claim 6 , wherein the channel is a channel of an unlicensed spectrum. 9 . The method of claim 6 , wherein the unsuccessful access attempts comprise an unsuccessful attempt of a random access transmission.
Assignees
Inventors
Classifications
- H04W52/367Primary
Power values between minimum and maximum limits, e.g. dynamic range · CPC title
Wireless channel access · CPC title
- H04W72/0453Primary
Resources in frequency domain, e.g. a carrier in FDMA · CPC title
- H04W74/0833Primary
Random access procedures, e.g. with 4-step access · CPC title
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Frequently asked questions
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- What does patent US12526753B2 cover?
- A method performed by a WTRU may comprise transmitting, to a gNB, a first random access preamble on a first physical random access channel (PRACH) resource of a first uplink (UL) carrier and determining that the transmission on the first PRACH resource is unsuccessful. The method may further comprise determining that a maximum number of random access retransmissions on the first UL carrier is m…
- Who is the assignee on this patent?
- Interdigital Patent Holdings Inc
- What technology area does this patent fall under?
- Primary CPC classification H04W52/367. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).