WO2017136458A3 - Listen-before-talk (lbt) failure during a random access procedure - Google Patents

Listen-before-talk (lbt) failure during a random access procedure Download PDF

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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
Application number
PCT/US2017/016074
Other languages
French (fr)
Other versions
WO2017136458A2 (en
Inventor
Seau Lim
Youn Hyoung Heo
Hwan-Joon Kwon
Huaning Niu
Jeongho Jeon
Abhijeet Bhorkar
Qiaoyang Ye
Seok Chul Kwon
Fatemeh HAMIDI-SEPEHR
Original Assignee
Intel IP Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel IP Corporation filed Critical Intel IP Corporation
Priority to CN201780007019.0A priority Critical patent/CN108476532A/en
Publication of WO2017136458A2 publication Critical patent/WO2017136458A2/en
Publication of WO2017136458A3 publication Critical patent/WO2017136458A3/en
Priority to HK19100653.7A priority patent/HK1258289A1/en

Links

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.
PCT/US2017/016074 2016-02-02 2017-02-01 Listen-before-talk (lbt) failure during a random access procedure WO2017136458A2 (en)

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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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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