WO2021171054A1 - Équipement utilisateur et procédé de communication associé - Google Patents

Équipement utilisateur et procédé de communication associé Download PDF

Info

Publication number
WO2021171054A1
WO2021171054A1 PCT/IB2020/000493 IB2020000493W WO2021171054A1 WO 2021171054 A1 WO2021171054 A1 WO 2021171054A1 IB 2020000493 W IB2020000493 W IB 2020000493W WO 2021171054 A1 WO2021171054 A1 WO 2021171054A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
information
type
access procedure
channel access
Prior art date
Application number
PCT/IB2020/000493
Other languages
English (en)
Inventor
Hao Lin
Original Assignee
Orope France Sarl
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 Orope France Sarl filed Critical Orope France Sarl
Priority to PCT/IB2020/000493 priority Critical patent/WO2021171054A1/fr
Publication of WO2021171054A1 publication Critical patent/WO2021171054A1/fr

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
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present disclosure relates to the field of communication systems, and more particularly, to a user equipment (UE) and a method of communication of the same, which can provide a good communication performance and high reliability.
  • UE user equipment
  • an unlicensed spectrum is a shared spectrum.
  • Communication equipments in different communication systems can use the unlicensed spectrum as long as the unlicensed meets regulatory requirements set by countries or regions on a spectrum. There is no need to apply for a proprietary spectrum authorization from a government.
  • a communication device follows a listen before talk (LBT) procedure, that is, the communication device needs to perform a channel sensing before transmitting a signal on a channel.
  • LBT listen before talk
  • an LBT outcome illustrates that the channel is idle
  • the communication device can perform signal transmission; otherwise, the communication device cannot perform signal transmission.
  • MCOT maximum channel occupancy time
  • NRU new radio-based access to unlicensed spectrum
  • UE user equipment
  • LBT also called a channel access procedure
  • a BS such as gNB
  • a UE can operate in a wider band including resource block (RB) sets.
  • New radio (NR) release 15 has defined a BWP concept, thus in a context of the NRU wideband operation, the UE can be configured with an active BWP including multiple RB sets.
  • NR new radio
  • a sender needs to perform the LBT procedure. This implies that for transmissions of multiple RB sets, multi-RB set-based LBT has to be performed. Because an outcome of the multi-RB-set based LBT cannot be ensured, the UE or the BS cannot predict the outcome of the LBT procedure.
  • An object of the present disclosure is to propose a user equipment (UE) and a method of communication of the same, which can solve issues in the prior art and provide a method for a physical layer in the UE to indicate to higher layers in the UE about a channel access outcome (such as a listen before talk (LBT) outcome).
  • UE user equipment
  • LBT listen before talk
  • a method of communication of a user equipment includes providing, to higher layers of a UE, by a physical layer in the UE, a first information, wherein the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a UE in a second aspect of the present disclosure, includes a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to control a first information, wherein the first information is provided to higher layers in the UE, by a physical layer in the UE, and the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a method of communication of a UE includes providing, to higher layers of a UE, by a physical layer in the UE, a first information after performing a first type channel access procedures in a first channel and a second channel, respectively, wherein the first information is used to determine a channel access failure on the first channel and the second channel.
  • a UE includes a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to control a first information, wherein the first information is provided to higher layers in the UE, by a physical layer in the UE, and the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.
  • a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.
  • a computer readable storage medium in which a computer program is stored, causes a computer to execute the above method.
  • a computer program product includes a computer program, and the computer program causes a computer to execute the above method.
  • a computer program causes a computer to execute the above method.
  • FIG. 1 is a block diagram of a user equipments (UE) and a base station (BS) (e.g., gNB) of communication in a communication network system according to an embodiment of the present disclosure.
  • UE user equipments
  • BS base station
  • gNB gNode B
  • FIG. 2 is a schematic diagram illustrating an architecture of a physical layer and higher layers in a UE according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic diagram illustrating an architecture of a physical layer and higher layers in a UE according to another embodiment of the present disclosure.
  • FIG. 4 is a flowchart illustrating a method of communication of a UE according to an embodiment of the present disclosure.
  • FIG. 5 is a flowchart illustrating a method of communication of a UE according to another embodiment of the present disclosure.
  • FIG. 6 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.
  • LBT long term evolution
  • a higher layer in the UE it should first perform LBT, also called a channel access procedure. It is also very helpful for a higher layer in the UE to know how often in a physical layer in the UE the channel is sensed to be not idle after performing the channel access procedure (i.e. LBT failure) and how often the channel is sensed to be idle after performing the channel access procedure (i.e. LBT success).
  • Some embodiments provide a method for a physical layer in a user equipment UE to indicate to higher layers in the UE about a channel access outcome (such as a listen before talk (LBT) outcome).
  • LBT listen before talk
  • FIG. 1 illustrates that, in some embodiments, a user equipment (UE) 10 and a base station (BS) (e.g., gNB) 20 (such as a network node) of communication in a communication network system 30 according to an embodiment of the present disclosure are provided.
  • the communication network system 30 includes one or more UEs 10 of a cell and the BS 20.
  • the UE 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12, the transceiver 13.
  • the base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22, the transceiver 23.
  • the processor 11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11 or 21.
  • the memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21.
  • the transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives a radio signal.
  • the processor 11 or 21 may include application-specific integrated circuit (ASIC), other chipset, logic circuit and/or data processing device.
  • the memory 12 or 22 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and/or other storage device.
  • the transceiver 13 or 23 may include baseband circuitry to process radio frequency signals.
  • modules e.g., procedures, functions, and so on
  • the modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21.
  • the memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21 in which case those can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.
  • FIG. 2 is a schematic diagram illustrating an architecture of a physical layer and higher layers in a UE according to an embodiment of the present disclosure.
  • FIG. 2 illustrates that, in some embodiments, a radio protocol architecture of a UE is represented by three layers, which are a Layer 1, a Layer 2 and a Layer 3 respectively.
  • the Layer 1 (LI layer) 201 is the lowest layer and implements various PHY (physical layer) signal processing functions.
  • the LI layer will be referred to herein as the PHY 201.
  • the Layer 2 (L2 layer) 205 is above the PHY 201, and is responsible for the link between the UE and a BS (such as a gNB) over the PHY 201.
  • BS such as a gNB
  • the L2 layer 205 includes a medium access control (MAC) sublayer 202, a radio link control (RLC) sublayer 203, and a packet data convergence protocol (PDCP) sublayer 204, which are terminated at the gNB on a network side.
  • the UE may include several higher layers above the L2 layer 205, including a network layer (i.e. IP layer) terminated at a P-GW on the network side and an application layer terminated at the other end (i.e. a peer UE, a server, etc.) of the connection.
  • the PDCP sublayer 204 provides multiplexing between different radio bearers and logical channels.
  • the PDCP sublayer 204 also provides header compression for higher-layer packets so as to reduce radio transmission overheads.
  • the PDCP sublayer 204 provides security by encrypting packets and provides support for UE handover between BSs.
  • the RLC sublayer 203 provides segmentation and reassembling of higher-layer packets, retransmission of lost packets, and reordering of lost packets to as to compensate for out-of-order reception due to a hybrid automatic repeat request (HARQ).
  • HARQ hybrid automatic repeat request
  • the MAC sublayer 202 provides multiplexing between logical channels and transport channels.
  • the MAC sublayer 202 is also responsible for allocating various radio resources (i.e., resource blocks) in one cell among UEs.
  • the MAC sublayer 202 is also in charge of HARQ operations.
  • the control plane also includes a radio resource control (RRC) sublayer 206 in the layer 3 (L3).
  • RRC radio resource control
  • the RRC sublayer 206 is responsible for acquiring radio resources (i.e. radio bearers) and configuring lower layers using an RRC signaling between the gNB and the UE.
  • the architecture illustrated in FIG. 2 is applicable to the UE in the present disclosure.
  • signaling of the first higher layer in the present disclosure is generated by the RRC sublayer 206.
  • signaling of the first-type physical layer in present the disclosure is generated by the PHY 301.
  • a physical layer and higher layers in a base station may be similar to that in the UE in some embodiments illustrated in FIG. 2.
  • FIG. 3 is a schematic diagram illustrating an architecture of a physical layer and higher layers in a UE according to another embodiment of the present disclosure.
  • FIG. 2 illustrates that, in some embodiments, a UE is constructed with a multi-layer processing system, preferably a seven-layer system.
  • a configurable lowest physical layer LI receives wireless communication signals and selectively processes the received signals according to its then present configuration.
  • a first higher level, L2 includes a physical layer processing control for reconfiguring the physical layer LI
  • a second higher layer, L3 includes a radio resource control (RRC) for providing the L2 physical layer processing control with paging channel parameters.
  • RRC radio resource control
  • the physical layer is commonly referred to as Layer 1 or LI.
  • L2 Layer 2
  • L3 Layer 3
  • L4 transport layer
  • L5 Layer 5
  • L6 Layer 6
  • L7 application layer
  • a physical layer and higher layers in a base station may be similar to that in the UE in some embodiments illustrated in FIG. 3.
  • the processor 11 of the UE 10 is configured to control a first information.
  • the first information is provided to higher layers in the UE, by a physical layer (such as Layer 1) in the UE 10, and the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a physical layer in the UE 10 to indicate to higher layers in the UE 10 about a channel access outcome (such as a listen before talk (LBT) outcome).
  • LBT listen before talk
  • the channel access failure comprises a listen before talk (LBT) failure happens on the first channel.
  • the first information is provided to the higher layers in the UE after performing a first type channel access procedure on the first channel. In some embodiments, the first information is provided to the higher layers in the UE after performing a first type channel access procedure, if the first channel is sensed to be not idle or LBT failure happens on the first channel. In some embodiments, a second information is provided, to the higher layers of the UE, by the physical layer in the UE, wherein the second information is corresponding to the first channel. In some embodiments, the physical layer in the UE provides the second information to the higher layers if the first information is provided to the higher layers in the UE.
  • the second information comprises at least one of a resource block set index of the first channel, an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, and a serving cell identity of the first channel.
  • the first information can be configured to be present.
  • the second information can be configured to be present.
  • a selection of the second information is related to an uplink transmission type.
  • the uplink transmission type comprises at least one of a physical uplink control channel (PUCCH) transmission, a physical uplink shared channel (PUSCH) without uplink shared channel (UL-SCH) transmission, a PUSCH with UL-SCH transmission, a sounding reference signal (SRS) transmission, a physical random access channel (PRACH) transmission, and a semi-persistent scheduled PUSCH (SPS PUSCH) transmission.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • UL-SCH uplink shared channel
  • SRS sounding reference signal
  • PRACH physical random access channel
  • SPS PUSCH semi-persistent scheduled PUSCH
  • the second information is provided if the uplink transmission type comprises at least one of the PUCCH transmission, the PUSCH without UL-SCH transmission, and the SRS transmission.
  • the first channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the first type channel access procedure comprises at least one of a type 1 channel access procedure, a type 2A channel access procedure, a type 2B channel access procedure, a type A1 multi-channel access procedure, a type A2 multi-channel access procedure, a type B1 multi-channel access procedure, a type B2 multi-channel access procedure, and a channel access procedure for semi-static channel occupancy.
  • the processor 21 of the base station (BS) 20 is configured to control a first information.
  • the first information is provided to higher layers in the BS 20, by a physical layer (such as Layer 1) in the BS 20, and the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a physical layer in the BS 20 to indicate to higher layers in the BS 20 about a channel access outcome (such as a listen before talk (LBT) outcome).
  • LBT listen before talk
  • the channel access failure comprises a listen before talk (LBT) failure happens on the first channel.
  • the first information is provided to the higher layers in the BS after performing a first type channel access procedure on the first channel.
  • the first information is provided to the higher layers in the BS after performing a first type channel access procedure, if the first channel is sensed to be not idle or LBT failure happens on the first channel.
  • a second information is provided, to the higher layers of the BS, by the physical layer in the BS, wherein the second information is corresponding to the first channel.
  • the physical layer in the BS provides the second information to the higher layers if the first information is provided to the higher layers in the BS.
  • the second information comprises at least one of a resource block set index of the first channel, an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, and a serving cell identity of the first channel.
  • the first information can be configured to be present.
  • the second information can be configured to be present.
  • a selection of the second information is related to an uplink transmission type.
  • the uplink transmission type comprises at least one of a physical uplink control channel (PUCCH) transmission, a physical uplink shared channel (PUSCH) without uplink shared channel (UL-SCH) transmission, a PUSCH with UL-SCH transmission, a sounding reference signal (SRS) transmission, a physical random access channel (PRACH) transmission, and a semi-persistent scheduled PUSCH (SPS PUSCH) transmission.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • UL-SCH uplink shared channel
  • SRS sounding reference signal
  • PRACH physical random access channel
  • SPS PUSCH semi-persistent scheduled PUSCH
  • the second information is provided if the uplink transmission type compnses at least one of the PUCCH transmission, the PUSCH without UL-SCH transmission, and the SRS transmission.
  • the first channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the first type channel access procedure comprises at least one of a type 1 channel access procedure, a type 2A channel access procedure, a type 2B channel access procedure, a type A1 multi-channel access procedure, a type A2 multi-channel access procedure, a type B1 multi-channel access procedure, a type B2 multi-channel access procedure, and a channel access procedure for semi-static channel occupancy.
  • the processor 11 of the UE 10 is configured to control a first information.
  • the first information is provided to higher layers in the UE 10, by a physical layer (such as Layer 1) in the UE 10, and the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a physical layer in the UE 10 to indicate to higher layers in the UE 10 about a channel access outcome (such as a listen before talk (LBT) outcome).
  • LBT listen before talk
  • the channel access failure comprises a listen before talk (LBT) failure happens on the first channel.
  • LBT listen before talk
  • the first information is provided if the first channel is sensed to be not idle. In some embodiments, the first information is provided if the first channel is sensed to be not idle and the second channel is sensed to be not idle.
  • the physical layer in the UE provides a second information to the higher layers of the UE if the first information is provided. In some embodiments, the second information is corresponding to at least one of the first channel and the second channel.
  • the second information comprises at least one of a resource block set index of the first channel, an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, a serving cell identity of the first channel, a resource block set index of the second channel, an uplink bandwidth part identity (bwp-Id) of the second channel, an uplink carrier identity of the second channel, and a serving cell identity of the second channel.
  • a resource block set index of the first channel an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, a serving cell identity of the first channel, a resource block set index of the second channel, an uplink bandwidth part identity (bwp-Id) of the second channel, an uplink carrier identity of the second channel, and a serving cell identity of the second channel.
  • the first type channel access procedure comprises at least one of a type 1 channel access procedure, a type 2A channel access procedure, a type 2B channel access procedure, a type A1 multi-channel access procedure, a type A2 multi-channel access procedure, a type B1 multi-channel access procedure, a type B2 multi-channel access procedure, and a channel access procedure for semi-static channel occupancy.
  • the first channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the second channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the processor 21 of the BS 20 is configured to control a first information.
  • the first information is provided to higher layers in the BS 20, by a physical layer (such as Layer 1) in the BS 20, and the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a physical layer in the BS 20 to indicate to higher layers in the BS 20 about a channel access outcome (such as a listen before talk (LBT) outcome).
  • LBT listen before talk
  • the channel access failure comprises a listen before talk (LBT) failure happens on the first channel.
  • LBT listen before talk
  • the first information is provided if the first channel is sensed to be not idle. In some embodiments, the first information is provided if the first channel is sensed to be not idle and the second channel is sensed to be not idle.
  • the physical layer in the BS provides a second information to the higher layers of the BS if the first information is provided. In some embodiments, the second information is corresponding to at least one of the first channel and the second channel.
  • the second information comprises at least one of a resource block set index of the first channel, an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, a serving cell identity of the first channel, a resource block set index of the second channel, an uplink bandwidth part identity (bwp-Id) of the second channel, an uplink carrier identity of the second channel, and a serving cell identity of the second channel.
  • a resource block set index of the first channel an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, a serving cell identity of the first channel, a resource block set index of the second channel, an uplink bandwidth part identity (bwp-Id) of the second channel, an uplink carrier identity of the second channel, and a serving cell identity of the second channel.
  • the first type channel access procedure comprises at least one of a type 1 channel access procedure, a type 2A channel access procedure, a type 2B channel access procedure, a type A1 multi-channel access procedure, a type A2 multi-channel access procedure, a type B1 multi-channel access procedure, a type B2 multi-channel access procedure, and a channel access procedure for semi-static channel occupancy.
  • the first channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the second channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the method 400 includes: a block 402, providing, to higher layers of a UE, by a physical layer in the UE, a first information, wherein the first information is used to inform that a first channel is sensed to be not idle or a channel access failure happens on the first channel.
  • a physical layer in the UE provides a method for a physical layer in the UE to indicate to higher layers in the UE about a channel access outcome (such as a listen before talk (LBT) outcome).
  • LBT listen before talk
  • the channel access failure comprises a listen before talk (LBT) failure happens on the first channel.
  • the first information is provided to the higher layers in the UE after performing a first type channel access procedure on the first channel.
  • the first information is provided to the higher layers in the UE after performing a first type channel access procedure, if the first channel is sensed to be not idle or LBT failure happens on the first channel.
  • the method further comprises providing, to the higher layers of the UE, by the physical layer in the UE, a second information, wherein the second information is corresponding to the first channel.
  • the physical layer in the UE provides the second information to the higher layers if the first information is provided to the higher layers in the UE.
  • the second information comprises at least one of a resource block set index of the first channel, an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, and a serving cell identity of the first channel.
  • the first information can be configured to be present.
  • the second information can be configured to be present.
  • a selection of the second information is related to an uplink transmission type.
  • the uplink transmission type comprises at least one of a physical uplink control channel (PUCCH) transmission, a physical uplink shared channel (PUSCH) without uplink shared channel (UL-SCH) transmission, a PUSCH with UL-SCH transmission, a sounding reference signal (SRS) transmission, a physical random access channel (PRACH) transmission, and a semi-persistent scheduled PUSCH (SPS PUSCH) transmission.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • UL-SCH uplink shared channel
  • SRS sounding reference signal
  • PRACH physical random access channel
  • SPS PUSCH semi-persistent scheduled PUSCH
  • the second information is provided if the uplink transmission type compnses at least one of the PUCCH transmission, the PUSCH without UL-SCH transmission, and the SRS transmission.
  • the first channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the first type channel access procedure comprises at least one of a type 1 channel access procedure, a type 2A channel access procedure, a type 2B channel access procedure, a type A1 multi-channel access procedure, a type A2 multi-channel access procedure, a type B1 multi-channel access procedure, a type B2 multi-channel access procedure, and a channel access procedure for semi-static channel occupancy.
  • FIG. 5 illustrates a method 500 of communication of a UE according to an embodiment of the present disclosure.
  • the method 500 includes: a block 502, providing, to higher layers of a UE, by a physical layer in the UE, a first information after performing a first type channel access procedures in a first channel and a second channel, respectively, wherein the first information is used to determine a channel access failure on the first channel and the second channel.
  • a physical layer in the UE to indicate to higher layers in the UE about a channel access outcome (such as a listen before talk (LBT) outcome).
  • LBT listen before talk
  • the channel access failure comprises a listen before talk (LBT) failure happens on the first channel.
  • LBT listen before talk
  • the first information is provided if the first channel is sensed to be not idle. In some embodiments, the first information is provided if the first channel is sensed to be not idle and the second channel is sensed to be not idle.
  • the physical layer in the UE provides a second information to the higher layers of the UE if the first information is provided. In some embodiments, the second information is corresponding to at least one of the first channel and the second channel.
  • the second information comprises at least one of a resource block set index of the first channel, an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, a serving cell identity of the first channel, a resource block set index of the second channel, an uplink bandwidth part identity (bwp-Id) of the second channel, an uplink carrier identity of the second channel, and a serving cell identity of the second channel.
  • a resource block set index of the first channel an uplink bandwidth part identity (bwp-Id) of the first channel, an uplink carrier identity of the first channel, a serving cell identity of the first channel, a resource block set index of the second channel, an uplink bandwidth part identity (bwp-Id) of the second channel, an uplink carrier identity of the second channel, and a serving cell identity of the second channel.
  • the first type channel access procedure comprises at least one of a type 1 channel access procedure, a type 2A channel access procedure, a type 2B channel access procedure, a type A1 multi-channel access procedure, a type A2 multi-channel access procedure, a type B1 multi-channel access procedure, a type B2 multi-channel access procedure, and a channel access procedure for semi-static channel occupancy.
  • the first channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • the second channel comprises at least one of a resource block set, an uplink bandwidth part, an uplink carrier, and a serving cell.
  • channel access procedure i.e. LBT failure
  • LBT failure indication is provided by the physical layer in the to its own higher layers about an LBT outcome.
  • This LBT failure indication can be a simple indication if the LBT failure happens once the physical layer does not pass the LBT with success. This can be translated to the specification as the following.
  • the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the channel access procedure; or the physical layer in the UE informs higher layers the channel is not idle unless the channel is sensed to be idle after performing the channel access procedure.
  • the channel access procedure has different types, i.e. type 1, type 2A, type 2B and type 2C, where type 2C does not sense the channel before transmission. Therefore, we can only restrict that the indication is applied when UE performs channel access procedure type 1 or 2A or 2B.
  • the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the type 1 channel access procedure or type 2A channel access procedure or type 2B channel access procedure; or the physical layer in the UE informs higher layers the channel is not idle, unless the channel is sensed to be idle after performing the type 1 channel access procedure or type 2A channel access procedure or type 2B channel access procedure.
  • the UE has to sense the channel in more than one sensing slots, and the number of the sensing slots are random.
  • the channel is sensed to be idle means that the channel is sensed to be idle for all these sensing slots. In this case, we can further restrict that:
  • the physical layer in the UE When UE performs type 1 channel access procedure, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle for all sensing slots during the type 1 channel access procedure; or when UE performs type 1 channel access procedure, the physical layer in the UE informs higher layers the channel is not idle, unless the channel is sensed to be idle for all sensing slots during the type 1 channel access procedure.
  • the number of the sensing slots is deterministic.
  • the physical layer in the UE When UE performs type 2A channel access procedure, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle for at least a sensing interval of 25 us; or when UE performs type 2A channel access procedure, the physical layer in the UE informs higher layers the channel is not idle, unless the channel is sensed to be idle for at least a sensing interval of 25 us.
  • the sensing interval has a fixed duration 16 us.
  • the physical layer in the UE when UE performs type 2B channel access procedure, provides an indication to higher layers unless the channel is sensed to be idle within a sensing duration of 16 us; or when UE performs type 2B channel access procedure, the physical layer in the UE informs higher layers the channel is not idle, unless the channel is sensed to be idle within a sensing duration of 16 us.
  • the indication provided by physical layer to the higher layers is the indication that the channel is sensed to be busy (i.e. not idle) after performing channel access procedure.
  • the physical layer can also provide some more precise information together with the ‘channel busy’ indication.
  • the indication can also include the carrier identity. The advantage is that in carrier aggregation case, the UE is configured with more than one uplink carriers. Thus, when the UE performs the channel access procedure and it would be necessary to indicate the higher layer in which cell the channel access procedure is performed.
  • the physical layer in the UE when a UE performs channel access procedures on carrier / of serving cell c, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the channel access procedure. If the indication is provided, the physical layer provides to the higher layers the carrier identity of the carrier / of serving cell c; or if the indication is provided, the physical layer provides to the higher layers the carrier identity of the carrier/ of serving cell c, on which the channel access procedures are performed.
  • UE in some other case of carrier aggregation, is configured with for instance two carriers, and they belong to different serving cells but they have the same carrier identity. In this situation, only indicate the carrier identity cannot differentiate these two carriers. Thus, the serving cell identity should also be provided from physical layer to higher layers.
  • the physical layer in the UE when a UE performs channel access procedures on carrier / of serving cell c, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the channel access procedure. If the indication is provided, the physical layer provides to the higher layers the serving cell identity of serving cell c; or if the indication is provided, the physical layer provides to the higher layers the carrier identity of serving cell c, on which the channel access procedures are performed; or when a UE performs channel access procedures on carrier / of serving cell c, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the channel access procedure.
  • the physical layer provides to the higher layers the carrier identity of carrier / and the serving cell identity serving cell c or if the indication is provided, the physical layer provides to the higher layers the carrier identity of carrier / and the serving cell identity of serving cell c, on which the channel access procedures are performed.
  • UE on a given carrier of a given serving cell, can be configured with multiple uplink bandwidth parts.
  • the uplink transmission can be performed in one of the configured uplink bandwidth parts (called active uplink bandwidth part).
  • active uplink bandwidth part the bandwidth part identity
  • the bandwidth part identity can also be provided to higher layers, so that the higher layers can identify in which portion of the carrier, the channel is busy (not idle).
  • the physical layer in the UE when a UE performs channel access procedures on an active bandwidth part (BWP) b of carrier / of serving cell c, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the channel access procedure. If the indication is provided, the physical layer provides to the higher layers the bwp-Id of active BWP b of carrier / of serving cell c or if the indication is provided, the physical layer provides to the higher layers the bwp-Id of active BWP b of carrier / of serving cell c, on which the channel access procedures are performed.
  • BWP active bandwidth part
  • a BWP contains more than one resource block sets (RB sets) and the RB sets are determined by separating the BWP into multiple set of resource blocks by one or more intra-cell guard bands, which are configured by RRC parameter intraCellGuardBandUL-rl 6.
  • the RB set index should be provided to higher layers, so that the higher layers can identify in which portion of the BWP, the channel is busy (not idle).
  • the physical layer in the UE when a UE performs channel access procedures on a RB set a of active bandwidth part (BWP) b of carrier / of serving cell c, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the channel access procedure.
  • BWP active bandwidth part
  • the physical layer provides to the higher layers the index of RB set a of active BWP b of carrier / of serving cell c; or if the indication is provided, the physical layer provides to the higher layers the index of RB set a of active BWP b of carrier / of serving cell c, on which the channel access procedures are performed; or when a UE performs channel access procedures on a RB set a of active bandwidth part (BWP) b of carrier / of serving cell c, the physical layer in the UE provides an indication to higher layers unless the channel is sensed to be idle after performing the channel access procedure.
  • BWP active bandwidth part
  • the physical layer provides to the higher layers the index of RB set a of active BWP b of serving cell c; or if the indication is provided, the physical layer provides to the higher layers the index of RB set a of active BWP b of serving cell c, on which the channel access procedures are performed.
  • UE can perform channel access procedures on more than one RB sets, respectively.
  • the physical layer can indicate to higher layers the all the channels on the RB sets, where the channel access procedures are performed, are busy (not idle).
  • the BWP and carrier and serving cell are omitted in the following description. It should be understood that the multiple BR sets where channel access procedures are performed can belong to the same BWP or different BWPs.
  • the physical layer in the UE when a UE performs channel access procedures on a set of RB sets, respectively, provides an indication to higher layers unless all the channels on the respective RB sets are sensed to be idle after performing the channel access procedure. If the indication is provided, the physical layer provides to the higher layers the indexes of RB sets, where the channel access procedures are performed.
  • the physical layer only indicates the RB set that is not sensed idle, while not indicating the RB set that is sensed idle.
  • the physical layer in the UE when a UE performs channel access procedures on a set of RB sets, respectively, provides an indication to higher layers unless all the channels on the respective RB sets are sensed to be idle after performing the channel access procedure. If the indication is provided, the physical layer provides to the higher layers the indexes of RB sets, where the channels are sensed to be not idle after performing respective channel access procedures.
  • the serving cell ID, carrier ID, bwp-Id, RB set index are used to resolve the ambiguity. If for any uplink transmission, there is a unique serving cell or carrier or uplink bandwidth part or RB set, their identities (or index) are not needed to be provided to higher layers.
  • uplink transmissions such as PUSCH (physical uplink shared channel) transmission, PUCCH (physical uplink control channel) transmission, SRS (sounding reference signal) transmission
  • different information may be needed for higher layers.
  • SRS transmission and PUSCH carrying only UCI (uplink control information) additional information to channel busy indication, e.g. serving cell ID, carrier ID, bwp-Id, RB set index, might be needed for higher layers.
  • the additional information e.g. serving cell ID, carrier ID, bwp-Id , RB set index, might not be needed to provide to higher layers.
  • the above embodiments are used on a user equipment (UE) side.
  • the above embodiments can also be used on a base station (BS) side, because the BS side also has a physical layer and higher layers.
  • the physical layer and higher layers in the BS side may be similar to the UE side.
  • Some embodiments of the present disclosure are a combination of “techniques/processes” that can be adopted in 3GPP specification to create an end product. Some embodiments of the present disclosure could be adopted in the 5G NR unlicensed band communications. Some embodiments of the present disclosure propose technical mechanisms.
  • FIG. 6 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software.
  • FIG. 6 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated.
  • the application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors.
  • the processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.
  • the baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include a baseband processor.
  • the baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry.
  • the radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc.
  • the baseband circuitry may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuit
  • the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency.
  • baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency.
  • RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and/or the application circuitry.
  • “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • some or all of the constituent components of the baseband circuitry, the application circuitry, and/or the memory/storage may be implemented together on a system on a chip (SOC).
  • SOC system on a chip
  • the memory/storage 740 may be used to load and store data and/or instructions, for example, for system.
  • the memory/storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM)), and/or non-volatile memory, such as flash memory.
  • DRAM dynamic random access memory
  • flash memory non-volatile memory
  • the I/O interface 780 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system.
  • User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc.
  • Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface.
  • the sensor 770 may include one or more sensing devices to determine environmental states and/or location information related to the system.
  • the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit.
  • the positioning unit may also be part of, or interact with, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • GPS global positioning system
  • the display 750 may include a display, such as a liquid crystal display and a touch screen display.
  • the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, a AR VR glasses, etc.
  • system may have more or less components, and/or different architectures.
  • methods described herein may be implemented as a computer program.
  • the computer program may be stored on a storage medium, such as a non-transitory storage medium.
  • the units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments. Moreover, each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.
  • the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer.
  • the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product.
  • one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product.
  • the software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure.
  • the storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other kinds of media capable of storing program codes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un équipement utilisateur et un procédé de communication associé. Le procédé consiste à fournir des premières informations aux couches supérieures d'un UE au moyen d'une couche physique dans l'UE, les premières informations étant utilisées pour indiquer qu'un premier canal a été détecté comme n'étant pas inactif ou qu'une défaillance d'accès au canal s'est produite sur le premier canal. On obtient ainsi un procédé permettant à la couche physique dans l'UE d'indiquer aux couches supérieures dans l'UE un résultat d'accès au canal (tel qu'un résultat d'écoute avant transmission (LBT).
PCT/IB2020/000493 2020-02-25 2020-02-25 Équipement utilisateur et procédé de communication associé WO2021171054A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/000493 WO2021171054A1 (fr) 2020-02-25 2020-02-25 Équipement utilisateur et procédé de communication associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/000493 WO2021171054A1 (fr) 2020-02-25 2020-02-25 Équipement utilisateur et procédé de communication associé

Publications (1)

Publication Number Publication Date
WO2021171054A1 true WO2021171054A1 (fr) 2021-09-02

Family

ID=72046936

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/000493 WO2021171054A1 (fr) 2020-02-25 2020-02-25 Équipement utilisateur et procédé de communication associé

Country Status (1)

Country Link
WO (1) WO2021171054A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220104258A1 (en) * 2019-02-15 2022-03-31 Electronics And Telecommunications Research Institute Signal transmission and reception method for unlicensed band communication, and apparatus therefor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3051689A1 (fr) * 2018-08-09 2020-02-09 Comcast Cable Communications, Llc Selection de canaux au moyen d`une methode d`acces multiple avec ecoute de porteuse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3051689A1 (fr) * 2018-08-09 2020-02-09 Comcast Cable Communications, Llc Selection de canaux au moyen d`une methode d`acces multiple avec ecoute de porteuse

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CMCC: "Enhancements on multi-beam operation", vol. RAN WG1, no. Xi'an, China; 20190408 - 20190412, 30 March 2019 (2019-03-30), XP051691724, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg%5Fran/WG1%5FRL1/TSGR1%5F96b/Docs/R1%2D1904736%2Ezip> [retrieved on 20190330] *
VIVO: "Discussion on physical UL channel design in NR unlicensed spectrum", vol. RAN WG1, no. Gothenburg, Sweden; 20180820 - 20180824, 10 August 2018 (2018-08-10), XP051515621, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg%5Fran/WG1%5FRL1/TSGR1%5F94/Docs/R1%2D1808236%2Ezip> [retrieved on 20180810] *
VIVO: "Discussion on the channel access procedures", vol. RAN WG1, no. Reno, USA; 20191118 - 20191122, 8 November 2019 (2019-11-08), XP051819906, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG1_RL1/TSGR1_99/Docs/R1-1912012.zip R1-1912012.doc> [retrieved on 20191108] *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220104258A1 (en) * 2019-02-15 2022-03-31 Electronics And Telecommunications Research Institute Signal transmission and reception method for unlicensed band communication, and apparatus therefor
US11864232B2 (en) * 2019-02-15 2024-01-02 Electronics And Telecommunications Research Institute Signal transmission and reception method for unlicensed band communication, and apparatus therefor

Similar Documents

Publication Publication Date Title
US20230232447A1 (en) User equipment and method of performing transmission in shared spectrum by same
US11490265B2 (en) Apparatus and method of processing collision between SSB transmission and periodic transmission
US20230131882A1 (en) User equipment and resource selection method in sidelink communication
US20220109486A1 (en) Apparatus and method of wireless communication
US20220200763A1 (en) Apparatus and method operable for medium access control packet data unit
US20230125590A1 (en) User equipment and method for sharing periodic channel occupancy
EP3977795B1 (fr) Appareil et procédé de communication sans fil
US20230140467A1 (en) Apparatus and method of wireless communication
US20230023518A1 (en) Apparatus and method of communication of same
WO2021171054A1 (fr) Équipement utilisateur et procédé de communication associé
WO2022213876A1 (fr) Équipement utilisateur et procédé de surveillance de ressources dans une communication de liaison latérale
WO2023010552A1 (fr) Équipement utilisateur et procédé de sélection de ressource dans une communication de liaison latérale
US20220385417A1 (en) Apparatus and method of communication of same
US20220408463A1 (en) User equipment and method of communication of same
US20220386370A1 (en) Apparatus and method of communication of same
WO2024092782A1 (fr) Équipement utilisateur et procédé de sélection de ressources de liaison latérale dans un spectre partagé
US20230087543A1 (en) Methods for wireless communication, ue, and base station
US20230135241A1 (en) Ue initiated channel access in unlicensed spectrum
WO2023011325A1 (fr) Équipement utilisateur et procédé d&#39;attribution de ressources dans une communication de liaison latérale
US20240064812A1 (en) Apparatus and method of wireless communication
WO2022208124A1 (fr) Appareil et procédé de communication sans fil
EP4315698A1 (fr) Appareil et procédé de communication sans fil
WO2023285850A1 (fr) Appareil et procédé pour éviter un conflit d&#39;id de cellule physique entre différents opérateurs dans un spectre sans licence
WO2023052806A1 (fr) Appareil et procédé de communication sans fil de multiples canaux physiques partagés de liaison descendante, pdsch

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20754346

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 17/11/2022)

122 Ep: pct application non-entry in european phase

Ref document number: 20754346

Country of ref document: EP

Kind code of ref document: A1