WO2017136458A3 - Listen-before-talk (lbt) failure during a random access procedure - Google Patents
Listen-before-talk (lbt) failure during a random access procedure Download PDFInfo
- Publication number
- WO2017136458A3 WO2017136458A3 PCT/US2017/016074 US2017016074W WO2017136458A3 WO 2017136458 A3 WO2017136458 A3 WO 2017136458A3 US 2017016074 W US2017016074 W US 2017016074W WO 2017136458 A3 WO2017136458 A3 WO 2017136458A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- prach
- lbt
- listen
- talk
- random access
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0825—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision detection
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Technology for a user equipment (UE) operable to perform a physical random access channel (PRACH) procedure with an eNodeB is disclosed. The UE can select a PRACH preamble for transmission to an eNodeB during the PRACH procedure. The UE can perform a listen-before-talk (LBT) to determine whether an unlicensed channel is available. The UE can detect a LBT failure at the UE. The LBT failure can indicate that the unlicensed channel is unavailable to transmit the PRACH preamble during a PRACH opportunity. The UE can select new PRACH resources for a subsequent PRACH opportunity. The UE can be configured to perform a PRACH preamble transmission during the subsequent PRACH opportunity when the UE is not subject to the LBT failure.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201780007019.0A CN108476532A (en) | 2016-02-02 | 2017-02-01 | Listem-before-talk (LBT) failure during random access procedure |
HK19100653.7A HK1258289A1 (en) | 2016-02-02 | 2019-01-15 | Listen-before-talk (lbt) failure during a random access procedure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201662290289P | 2016-02-02 | 2016-02-02 | |
US62/290,289 | 2016-02-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2017136458A2 WO2017136458A2 (en) | 2017-08-10 |
WO2017136458A3 true WO2017136458A3 (en) | 2017-09-14 |
Family
ID=58018296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2017/016074 WO2017136458A2 (en) | 2016-02-02 | 2017-02-01 | Listen-before-talk (lbt) failure during a random access procedure |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN108476532A (en) |
HK (1) | HK1258289A1 (en) |
WO (1) | WO2017136458A2 (en) |
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- 2017-02-01 WO PCT/US2017/016074 patent/WO2017136458A2/en active Application Filing
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2019
- 2019-01-15 HK HK19100653.7A patent/HK1258289A1/en unknown
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Also Published As
Publication number | Publication date |
---|---|
HK1258289A1 (en) | 2019-11-08 |
WO2017136458A2 (en) | 2017-08-10 |
CN108476532A (en) | 2018-08-31 |
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