CN110138530B - Beam-based transmission method, device and base station in unlicensed spectrum - Google Patents

Beam-based transmission method, device and base station in unlicensed spectrum Download PDF

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Publication number
CN110138530B
CN110138530B CN201810136490.6A CN201810136490A CN110138530B CN 110138530 B CN110138530 B CN 110138530B CN 201810136490 A CN201810136490 A CN 201810136490A CN 110138530 B CN110138530 B CN 110138530B
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base station
predetermined time
unlicensed spectrum
csi
equal
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CN110138530A (en
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张萌
沈兴亚
王化磊
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

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

Abstract

The invention provides a beam-based transmission method, a beam-based transmission device and a beam-based transmission base station in an unlicensed spectrum (unlicensed band). The method comprises the following steps: on an unlicensed spectrum, before beam-based transmission, judging whether a first preset condition or a second preset condition is met; adopting LBT when the first preset condition is met, and carrying out transmission based on the wave beam; when a second preset condition is satisfied, the LBT is not adopted when the beam-based transmission is performed, and the channel or the reference signal is directly transmitted or transmitted after a period of time. The present invention is able to determine when to use LBT on the NR unlicensed spectrum and when to transmit the channel or reference signal directly without LBT.

Description

Beam-based transmission method, device and base station in unlicensed spectrum
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a base station for beam-based transmission in an unlicensed spectrum (unlicensed band).
Background
On a licensed band (licensed band) of a 5G NR (New Radio, New air interface), there are flows of downlink beam management (DL beam management) and uplink beam management (UL beam management). Specifically, for downlink beam management, one or more CSI-RS (Channel State Information Reference Signal) resource sets (which contain one or more CSI-RS resources) are transmitted, wherein for each CSI-RS resource set, whether all CSI-RS resources within the corresponding CSI-RS resource set use the same spatial configuration (or the same Tx beam or the same Rx beam or a beam corresponding relationship between the Tx beam and the Rx beam) may be indicated by repetition on/off. Wherein on corresponds to using the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between Tx beam and Rx beam), and off corresponds to using a different spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between Tx beam and Rx beam).
The uplink beam management is implemented by triggering one or more SRS (Sounding Reference Signal) resource sets or one or more SRS resources. Wherein, spatial configuration (or same Tx beam or same Rx beam or beam correlation relationship between Tx beam and Rx beam) of each SRS resource can be derived by uniquely specifying a corresponding downlink CSI-RS resource or SSB (SS/PBCH block) by the base station. The specific implementation method can be as follows: the UE is configured to receive a transmission beam corresponding to a reception beam specifying a CSI-RS resource or an SSB as a Tx beam (or spatial configuration) of a corresponding SRS resource. In addition, the Tx beam (or spatial configuration) of each SRS resource can be derived by the base station uniquely designating a corresponding SRS resource corresponding to the last transmission.
Beam-based transmission is also suitable in the unlicensed spectrum (unlicensed band), especially at high frequencies (37GHz, 60 GHz). However, on unlicensed spectrum, other technologies often exist, and wifi, bluetooth, Zigbee, etc. are common. In addition, there may be LTE-LAA on the unlicensed spectrum at 5 GHz. How NR LAA coexists fairly with these prior art technologies on unlicensed spectrum is an important research direction in the future, and LBT (Listen Before Talk) mechanism is one of the most effective means known at present to solve this problem.
LBT is specifically present in LTE-LAA (LTE licensed Assisted Access) in two forms: the Normal LBT and the One shot LBT respectively correspond to the following rules in the LTE-LAA protocol:
Normal LBT：
The eNB may transmit a transmission including PDSCH/PDCCH/EPDCCH on a carrier on which LAA Scell(s)transmission(s)are performed,after first sensing the channel to be idle during the slot durations of a defer duration Td；and after the counter Nis zero in step 4.The counter N is adjusted by sensing the channel for additional slot duration(s)according to the steps below:
1)set N＝Ninit,where Ninit is a random number uniformly distributed between 0 and CWp,and go to step 4；
2)if N＞0and the eNB chooses to decrement the counter,set N＝N-1；
3)sense the channel for an additional slot duration,and if the additional slot duration is idle,go to step 4；else,go to step 5；
4)if N＝0,stop；else,go to step 2.
5)sense the channel until either a busy slot is detected within an additional defer duration Td or all the slots of the additional defer duration Td are detected to be idle；
6)if the channel is sensed to be idle during all the slot durations of the additional defer duration Td,go to step 4；else,go to step 5；
If an eNB has not transmitted a transmission including
PDSCH/PDCCH/EPDCCH on a carrier on which LAA Scell(s)transmission(s)are performed after step 4 in the procedure above,the eNB may transmit a transmission including PDSCH/PDCCH/EPDCCH on the carrier,if the channel is sensed to be idle at least in a slot duration Tsl when the eNB is ready to transmit
PDSCH/PDCCH/EPDCCH and if the channel has been sensed to be idle during all the slot durations of a defer duration Td immediately before this transmission.If the channel has not been sensed to be idle in a slot duration Tsl when the eNB first senses the channel after it is ready to transmit or if the channel has been sensed to be not idle during any of the slot durations of a defer duration Td immediately before this intended transmission,the eNB proceeds to step 1 after sensing the channel to be idle during the slot durations of a defer duration Td.
One shot LBT：
An eNB may transmit a transmission including discovery signal but not including PDSCH on a carrier on which LAA Scell(s)transmission(s)are performedimmediately after sensing the channel to be idle for at least a sensing interval
Tdrs＝25us and if the duration of the transmission is less than 1ms.Tdrs consists of a duration Tf＝16usimmediately followed by one slot duration Tsl＝9us and Tfincludes an idle slot duration Tslat start of Tf.The channel is considered to be idle for Tdrsif it is sensed to be idle during the slot durations of Tdrs.
in addition, it should be noted that there is DRS (Discovery reference signal) in LTE-LAA, which is used for the purpose of UE synchronization, channel measurement and the like. In LTE-LAA, the DRS includes PSS + SSS + CRS (CSI-RS is optional).
However, in NR LAA, the DRS may be any of the following possibilities, although others are possible: PSS + SSS, PSS + SSS + CSI-RS, PSS + SSS + TRS, PSS + SSS + PBCH + CSI-RS, and the like.
Currently there is no beam-based transmission within LTE-LAA, and furthermore there is no LBT rule in LTE-LAA specifically for DRS, CSI-RS resources (set), and SRS resources (set) based on beam transmission.
Disclosure of Invention
The beam-based transmission method, the beam-based transmission device and the beam-based transmission base station in the unlicensed spectrum can determine when the LBT is used on the NR unlicensed spectrum and when the channel or the reference signal can be directly transmitted without the LBT.
In a first aspect, the present invention provides a method for beam-based transmission in an unlicensed spectrum, including:
on an unlicensed spectrum, before beam-based transmission, judging whether a first preset condition or a second preset condition is met;
adopting LBT when the first preset condition is met, and carrying out transmission based on the wave beam;
when a second preset condition is satisfied, the LBT is not adopted when the beam-based transmission is performed, and the channel or the reference signal is directly transmitted or transmitted after a period of time.
Optionally, the employing LBT in beam-based transmission when the first preset condition is satisfied includes:
when the base station is configured to send the aperiodic CSI-RS resource set, and the repetition is configured to be on, if the base station measures that the current channel is in an idle state in a preset time period before the first one or more CSI-RS resources sent in the CSI-RS resource set transmission time are sent, other CSI-RS resources are directly transmitted or other CSI-RS resources are transmitted after a period of time except LBT adopted when the first one or more CSI-RS resources are sent.
Optionally, when the second preset condition is satisfied, the LBT is not used when performing beam-based transmission, and directly transmitting the channel or the reference signal or transmitting the channel or the reference signal after an interval of time includes:
when the base station is configured to send the aperiodic CSI-RS resource set and the repetition is configured to be off, the base station measures that a current channel is in an idle state in a preset time period before transmitting each CSI-RS resource of the CSI-RS resource set, and if the current channel is idle, the CSI-RS resource is directly transmitted or the CSI-RS resource is transmitted after a period of time.
Optionally, when the second preset condition is satisfied, the transmitting the channel or the reference signal directly or after a certain time interval without using LBT when performing beam-based transmission includes:
when any one of the following conditions is satisfied, the PDSCH is directly transmitted or is transmitted after a certain time interval:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PDSCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PDSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam; or within the preset time less than or equal to the preset time, the base station sends the PDCCH, and the high-layer signaling configuration tci-PresentInDCI is off;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDSCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PDSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, when the second preset condition is satisfied, the transmitting the channel or the reference signal directly or after a certain time interval without using LBT when performing beam-based transmission includes:
when any one of the following conditions is satisfied, the PDCCH is directly transmitted or transmitted after a certain time interval:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PDCCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDCCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUCCH, and the PUCCH and a PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beamcorrespondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, when the second preset condition is satisfied, the transmitting the channel or the reference signal directly or after a certain time interval without using LBT when performing beam-based transmission includes:
and when any one of the following conditions is met, directly transmitting the PUSCH or transmitting the PUSCH after a certain time interval:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUSCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beamcorrespondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PUSCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has a PUSCH transmitted, and the PUSCH to be transmitted have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, when the second preset condition is satisfied, the transmitting the channel or the reference signal directly or after a certain time interval without using LBT when performing beam-based transmission includes:
when any one of the following conditions is satisfied, the PUCCH is directly transmitted or is transmitted after a period of time:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUCCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PUCCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, the employing LBT in beam-based transmission when the first preset condition is satisfied includes:
after the beam failure occurs, after the base station receives the preamble sent by the UE for beam failure recovery, one of the following operations is performed:
only one shot LBT is adopted when response information or RAR is sent;
sending response information or RAR only adopting normal LBT;
if the base station approves the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new beam reported by the UE, the base station performs a normal LBT procedure before sending response information or RAR.
Optionally, when the second preset condition is satisfied, the transmitting the channel or the reference signal directly or after a certain time interval without using LBT when performing beam-based transmission includes:
after the beam failure occurs, after the base station receives the preamble sent by the UE for beam failure recovery, one of the following operations is performed:
directly sending response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station approves the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station does not recognize the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource.
In a second aspect, the present invention provides a device for beam-based transmission in an unlicensed spectrum, including:
a determining unit configured to determine whether a first preset condition or a second preset condition is satisfied before performing beam-based transmission on an unlicensed spectrum;
a first transmission unit, configured to, when a first preset condition is satisfied, adopt LBT when performing beam-based transmission;
and a second transmission unit, configured to directly transmit the channel or the reference signal or transmit the channel or the reference signal after a certain time interval without using LBT when performing beam-based transmission when a second preset condition is satisfied.
Optionally, the first transmission unit is configured to, when the base station is configured to send the aperiodic CSI-RS resource set, and the repetition is configured to be on, if the base station measures that the current channel is in an idle state within a predetermined time period before transmitting the first one or more CSI-RS resources sent in the CSI-RS resource set time, directly transmit other CSI-RS resources or transmit other CSI-RS resources after a certain time interval except that LBT is used to send the first one or more CSI-RS resources.
Optionally, the second transmission unit is configured to, when the base station is configured to send the aperiodic CSI-RS resource set and the repetition is configured to be off, measure whether a current channel is in an idle state in a predetermined time period before transmitting each CSI-RS resource of the CSI-RS resource set, and if the current channel is in the idle state, directly transmit the CSI-RS resource or transmit the CSI-RS resource after a period of time.
Optionally, the second transmission unit is configured to directly transmit the PDSCH or retransmit the PDSCH after a time interval when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PDSCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PDSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam; or within the preset time less than or equal to the preset time, the base station sends the PDCCH, and the high-layer signaling configuration tci-PresentInDCI is off;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDSCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PDSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, the second transmission unit is configured to directly transmit the PDCCH or transmit the PDCCH after a certain time interval when any one of the following conditions is met:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PDCCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam and Rx beam have a beam correlation relationship;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDCCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUCCH, and the PUCCH and a PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, the second transmission unit is configured to directly transmit the PUSCH or retransmit the PUSCH at an interval of time when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUSCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beamcorrespondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PUSCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has a PUSCH transmitted, and the PUSCH to be transmitted have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, the second transmission unit is configured to directly transmit the PUCCH or transmit the PUCCH after a certain time interval when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUCCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PUCCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
Optionally, the first transmitting unit is configured to, after the beam failure occurs, perform one of the following operations after the base station receives a preamble for beam failure recovery sent by the UE:
only one shot LBT is adopted when response information or RAR is sent;
sending response information or RAR only adopting normal LBT;
if the base station approves the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new beam reported by the UE, the base station performs a normal LBT procedure before sending response information or RAR.
Optionally, the second transmitting unit is configured to, after the beam failure occurs, perform one of the following operations after the base station receives a preamble for beam failure recovery sent by the UE:
directly sending response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station approves the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station does not recognize the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource.
In a third aspect, the present invention provides a base station, where the base station includes the beam-based transmission apparatus in the unlicensed spectrum.
In the method, the apparatus, and the base station for beam-based transmission in an unlicensed spectrum according to embodiments of the present invention, on the unlicensed spectrum, before performing beam-based transmission, it is determined whether a first preset condition or a second preset condition is satisfied, when the first preset condition is satisfied, LBT is used when performing beam-based transmission, and when the second preset condition is satisfied, LBT is not used when performing beam-based transmission, and a channel or a reference signal is directly transmitted or is transmitted after a time interval, so that it can be determined when LBT is used and when LBT is not used on an NR unlicensed spectrum, a channel or a reference signal can be directly transmitted.
Drawings
Fig. 1 is a flow chart of a method for beam-based transmission in unlicensed spectrum according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a beam-based transmission apparatus in an unlicensed spectrum according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a transmission method based on wave beams in an unlicensed spectrum, as shown in fig. 1, the method comprises the following steps:
s11, before performing beam-based transmission on the unlicensed spectrum, determining whether a first preset condition or a second preset condition is satisfied.
S12, when the first preset condition is satisfied, adopting LBT when beam-based transmission is performed.
S13, when the second preset condition is satisfied, directly transmitting the channel or the reference signal or transmitting the channel or the reference signal after a certain time interval without using LBT when performing beam-based transmission.
In the method for transmitting based on beams in an unlicensed spectrum provided in the embodiments of the present invention, on the unlicensed spectrum, before performing beam-based transmission, it is determined whether a first preset condition or a second preset condition is satisfied, when the first preset condition is satisfied, LBT is used when performing beam-based transmission, and when the second preset condition is satisfied, LBT is not used when performing beam-based transmission, and a channel or a reference signal is directly transmitted or is transmitted after a period of time, so that it can be determined when LBT is used on an NR unlicensed spectrum and when LBT is not used and a channel or a reference signal can be directly transmitted.
The following describes the beam-based transmission method in the unlicensed spectrum according to the present invention in detail with reference to specific embodiments.
The types of unlicensed spectrum supported within NRs can be generally divided into two categories: one is a standalone LAA and the other is a non-standalone LAA. The difference between the two is that the latter is always configured with a licensed Pcell, which can assist in the transmission of some channels or reference signals or configuration information.
The following are some specific implementation methods, and it should be noted that the following methods may be applied to a scenario of a standby LAA or a scenario of a non-standby LAA.
Of course, we introduce a restriction to support aperiodic transmitted CSI-RS or aperiodic transmitted SRS on NR LAA carrier (cell/Scell/Pcell). Periodically transmitted CSI-RS or periodically transmitted SRS or SP CSI-RS or SP SRS are not supported on NR LAA carrier (cell/Scell/Pcell).
For each CSI-RS resource set, whether all CSI-RS resources within the corresponding CSI-RS resource set use the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam) may be indicated by repetition on/off. Wherein on corresponds to using the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between Tx beam and Rx beam), and off corresponds to using a different spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between Tx beam and Rx beam).
In the following embodiments, the Normal LBT and One shot LBT appearing therein are only named for the specific rules appearing in the LTE-LAA protocol, and they respectively correspond to the following rules in the LTE-LAA protocol:
Normal LBT：
The eNB may transmit a transmission including PDSCH/PDCCH/EPDCCH on a carrier on which LAA Scell(s)transmission(s)are performed,after first sensing the channel to be idle during the slot durations of a defer duration Td；and after the counter Nis zero in step 4.The counter N is adjusted by sensing the channel for additional slot duration(s)according to the steps below:
1)set N＝Ninit,where Ninit is a random number uniformly distributed between 0 and CWp,and go to step 4；
2)if N＞0and the eNB chooses to decrement the counter,set N＝N-1；
3)sense the channel for an additional slot duration,and if the additional slot duration is idle,go to step 4；else,go to step 5；
4)if N＝0,stop；else,go to step 2.
5)sense the channel until either a busy slot is detected within an additional defer duration Td or all the slots of the additional defer duration Td are detected to be idle；
6)if the channel is sensed to be idle during all the slot durations of the additional defer duration Td,go to step 4；else,go to step 5；
If an eNB has not transmitted a transmission including
PDSCH/PDCCH/EPDCCH on a carrier on which LAA Scell(s)transmission(s)are performed after step 4 in the procedure above,the eNB may transmit a transmission including PDSCH/PDCCH/EPDCCH on the carrier,if the channel is sensed to be idle at least in a slot duration Tsl when the eNB is ready to transmit
PDSCH/PDCCH/EPDCCH and if the channel has been sensed to be idle during all the slot durations of a defer duration Td immediately before this transmission.If the channel has not been sensed to be idle in a slot duration Tsl when the eNB first senses the channel after it is ready to transmit or if the channel has been sensed to be not idle during any of the slot durations of a defer duration Td immediately before this intended transmission,the eNB proceeds to step 1 after sensing the channel to be idle during the slot durations of a defer duration Td.
One shot LBT：
An eNB may transmit a transmission including discovery signal but not including PDSCH on a carrier on which LAA Scell(s)transmission(s)are performed immediately after sensing the channel to be idle for at least a sensing interval
Tdrs＝25us and if the duration of the transmission is less than 1 ms.Tdrs consists of a duration Tf＝16usimmediately followed by one slot duration Tsl＝9us and Tfincludes an idle slot duration Tslat start of Tf.The channel is considered to be idle for Tdrsif it is sensed to be idle during the slot durations of Tdrs.
it should be noted that, for the rules corresponding to the Normal LBT and the One shot LBT, specific parameter values of the parameters appearing therein are only exemplary descriptions, and the present invention is not limited thereto, and under the condition that the above similar rules are satisfied, the values of the relevant parameters are other parameter values, which also belongs to the protection scope of the present invention.
Example 1
On the unlicensed spectrum, if the base station is configured to send an aperiodic CSI-RS resource set and the repetition is configured to be on, the base station only needs to measure (sense) that a current channel is idle in a time period Td before transmitting a first CSI-RS resource (or several CSI-RS resources, if an FDM method is adopted) sent on the time of transmitting the CSI-RS resource set, and then the CSI-RS resource set can be transmitted on the unlicensed spectrum. In addition to the first CSI-RS resource (or several CSI-RS resources, if FDM is adopted) sent in time, other CSI-RS resources in the CSI-RS resource set may be sent directly without LBT.
Wherein, Td can be 25us, or 16us, or 9us or other values. The idle state is defined as that the channel energy measured in an observation period is less than or equal to or less than a certain threshold for more than a certain time, for example, if 4us of the channel energy measured in the 9us observation period is less than or equal to or less than a certain threshold, the channel is considered to be idle. As another example, when Td is 25us, Td may be composed of Tf with a time length of 16us and Tsl with a time length of 9us, where Tf includes a free slot interval Tsl at the beginning, and the condition for Td to determine to be free is that all Tsl are free within Td.
Example 2
On the unlicensed spectrum, if the base station is configured to send an aperiodic CSI-RS resource set and the repetition is configured to be off, the base station needs to measure (sense) that a current channel is idle in a time period Td before transmitting each CSI-RS resource (or a plurality of CSI-RS resources are in a group if FDM mode is adopted) of the CSI-RS resource set, and may transmit the CSI-RS resources on the unlicensed spectrum.
Wherein, Td can be 25us, or 16us, or 9us or other values. The idle state is defined as that the channel energy measured in an observation period is less than or equal to or less than a certain threshold for more than a certain time, for example, if 4us of the channel energy measured in the 9us observation period is less than or equal to or less than a certain threshold, the channel is considered to be idle. As another example, when Td is 25us, Td may be composed of Tf with a time length of 16us and Tsl with a time length of 9us, where Tf includes a free slot interval Tsl at the beginning, and the condition for Td to determine to be free is that all Tsl are free within Td.
Example 3
On the unlicensed spectrum, the base station may transmit the PDSCH directly without LBT or oneshot LBT as long as one of the following conditions is met:
3-1: in the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has transmitted the DRS, and the DRS and the PDSCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
3-2: in the unlicensed spectrum, the base station has sent a PDCCH within a predetermined time or less, and the PDCCH and the PDSCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam). Or within the preset time less than or equal to the preset time, the base station sends the PDCCH, and the high-layer signaling configuration tci-PresentInDCI is off.
3-3: in the unlicensed spectrum, the base station has transmitted the PDSCH within a predetermined time or less, and the PDSCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
3-4: on an unlicensed spectrum, a base station transmits a CSI-RS (CSI-RS resource or a CSI-RS resource set) within a predetermined time or less, and the CSI-RS (CSI-RS resource or the CSI-RS resource set) has the same spatial configuration as a PDSCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
3-5: in the unlicensed spectrum, the base station has sent downlink transmission within a predetermined time or less, and the downlink transmission has the same spatial configuration as the PDSCH to be sent (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
3-6: in the unlicensed spectrum, the base station has transmitted an SRS (SRS resource or SRS resource set) for a predetermined time or less, and the SRS (SRS resource or SRS resource set) has the same spatial configuration as the PDSCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
3-7: in the unlicensed spectrum, the base station has transmitted a PUCCH within a predetermined time or less, and the PUCCH and the PDSCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
3-8: in the unlicensed spectrum, the base station has transmitted a PUSCH within a predetermined time or less, and the PUSCH has the same spatial configuration as the PDSCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
3-9: on the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has sent uplink transmission, and the uplink transmission and the PDSCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
3-10: on the unlicensed spectrum, the base station has sent downlink transmission within a predetermined time less than or equal to a predetermined time.
3-11: on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Example 4
On the unlicensed spectrum, the base station may directly transmit the PDCCH without LBT or one-shot LBT as long as one of the following conditions is met:
4-1: in the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has transmitted the DRS, and the DRS and the PDCCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
4-2: in the unlicensed spectrum, the base station has transmitted the PDSCH within a predetermined time or less, and the PDSCH and the PDCCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
4-3: in the unlicensed spectrum, the base station has sent the PDCCH within a predetermined time or less, and the PDCCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
4-4: on an unlicensed spectrum, a base station transmits a CSI-RS (CSI-RS resource or a CSI-RS resource set) within a predetermined time or less, and the CSI-RS (CSI-RS resource or the CSI-RS resource set) and a PDCCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or the beam correseaponce relationship between the Tx beam and the Rx beam).
4-5: in the unlicensed spectrum, the base station has sent downlink transmission within a predetermined time or less, and the downlink transmission and the PDCCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
4-6: in the unlicensed spectrum, within a predetermined time or less, the base station has transmitted an SRS (SRS resource or SRS resource set), and the SRS (SRS resource or SRS resource set) has the same spatial configuration as the PDCCH to be transmitted (or the same Tx beam or the same Rxbeam or a beam correspondance relationship between the Tx beam and the Rx beam).
4-7: in the unlicensed spectrum, the base station has transmitted a PUCCH within a predetermined time or less, and the PUCCH and a PDCCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
4-8: in the unlicensed spectrum, the base station has transmitted a PUSCH within a predetermined time or less, and the PUSCH has the same spatial configuration as a PDCCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
4-9: on the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has sent uplink transmission, and the uplink transmission and the PDCCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
4-10: on the unlicensed spectrum, the base station has sent downlink transmission within a predetermined time less than or equal to a predetermined time.
4-11: on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Example 5
On the unlicensed spectrum, the base station may transmit PUSCH directly without LBT or oneshot LBT as long as one of the following conditions is met:
5-1: on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted a DRS, and the DRS and a PUSCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
5-2: in the unlicensed spectrum, the base station has sent a PDCCH within a predetermined time or less, and the PDCCH and the PUSCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam).
5-3: in the unlicensed spectrum, the base station has transmitted the PDSCH within a predetermined time or less, and the PDSCH has the same spatial configuration as the PUSCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
5-4: on an unlicensed spectrum, a base station transmits a CSI-RS (CSI-RS resource or a CSI-RS resource set) within a predetermined time or less, and the CSI-RS (CSI-RS resource or the CSI-RS resource set) has the same spatial configuration as a PUSCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
5-5: on the unlicensed spectrum, the base station has sent downlink transmission within a predetermined time or less, and the downlink transmission has the same spatial configuration as the PUSCH to be sent (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
5-6: in the unlicensed spectrum, within a predetermined time or less, the base station has transmitted an SRS (SRS resource or SRS resource set), and the SRS (SRS resource or SRS resource set) has the same spatial configuration as the PUSCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
5-7: in the unlicensed spectrum, the base station has transmitted a PUCCH in a predetermined time or less, and the PUCCH and the PUSCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
5-8: in the unlicensed spectrum, the base station has transmitted the PUSCH within a predetermined time or less, and the PUSCH has the same spatial configuration as the PUSCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
5-9: on the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has sent uplink transmission, and the uplink transmission and the PUSCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
5-10: on the unlicensed spectrum, the base station has sent downlink transmission within a predetermined time less than or equal to a predetermined time.
5-11: on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Example 6
On the unlicensed spectrum, the base station may directly transmit the PUCCH without LBT or one-shot LBT as long as one of the following conditions is satisfied:
6-1: on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted a DRS, and the DRS and a PUCCH to be transmitted have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
6-2: in the unlicensed spectrum, the base station has sent a PDCCH within a predetermined time or less, and the PDCCH and the PUCCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
6-3: on the unlicensed spectrum, the base station has transmitted the PDSCH within a predetermined time or less, and the PDSCH has the same spatial configuration as the PUCCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
6-4: on an unlicensed spectrum, a base station transmits a CSI-RS (CSI-RS resource or a CSI-RS resource set) within a predetermined time or less, and the CSI-RS (CSI-RS resource or the CSI-RS resource set) has the same spatial configuration as a PUCCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
6-5: on the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has sent downlink transmission, and the downlink transmission has the same spatial configuration as the PUCCH to be sent (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
6-6: in the unlicensed spectrum, within a predetermined time or less, the base station has transmitted an SRS (SRS resource or SRS resource set), and the SRS (SRS resource or SRS resource set) has the same spatial configuration as the PUCCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
6-7: in the unlicensed spectrum, the base station has sent the PUCCH within a predetermined time or less, and the PUCCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation between the Tx beam and the Rx beam).
6-8: in the unlicensed spectrum, the base station has a PUSCH transmitted within a predetermined time or less, and the PUSCH has the same spatial configuration as a PUCCH to be transmitted (or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam).
6-9: on the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has sent uplink transmission, and the uplink transmission and the PUCCH to be sent have the same spatial configuration (or the same Tx beam or the same Rx beam or a beam correlation relationship between the Tx beam and the Rx beam).
6-10: on the unlicensed spectrum, the base station has sent downlink transmission within a predetermined time less than or equal to a predetermined time.
6-11: on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Example 7
After the beam failure occurs, the UE needs to send information of the selected new beam to the base station (the RS (including CSI-RS, SRS, or SSB) corresponding to the beam information has a mapping relationship with some preamble resource or resources), and at this time, one shot LBT is used or LBT is not used when msg.1 (or preamble or PRACH resource) is sent.
After receiving a preamble (or referred to as msg.1 (or preamble or PRACH resource) or msg.1 (or preamble or PRACH resource) for Beam Failure Recovery (BFR) sent by the UE, the base station may perform one of the following operations:
7-1: the base station sending response information (or called RAR) (or called msg.2 or msg.2for BFR) only needs to adopt one shot LBT.
7-2: the base station sends response information (or referred to as RAR) (or referred to as msg.2 or msg.2for BFR) without LBT, and may send the response information directly after the UE sends msg.1 (or preamble or PRACH resource) for a fixed time (such as 4 slots, or after 3 slots, or 2 slots, or 1 slot, or other values).
7-3: the base station sending response information (alternatively called RAR) (alternatively called msg.2 or msg.2for BFR) only needs to adopt normal LBT.
7-4: if the base station recognizes the new beam reported by the UE (i.e. the spatial configuration used by the base station to send the response is the same as the new beam reported by the UE), the base station needs to use one shot LBT to send the response message (or called RAR) (or called Msg.2 or Msg.2for BFR).
7-5: if the base station recognizes that the new beam reported by the UE (i.e. the spatial configuration used by the base station to send the response is the same as the new beam reported by the UE), the base station sends the response information (or referred to as RAR) (or referred to as msg.2 or msg.2for BFR) without LBT, and the response information may be sent directly after the UE sends msg.1 (or preamble or PRACH resource) for a fixed time (e.g. 4 slots, or after 3 slots, or after 2 slots, or after 1 slot, or other values).
7-6: if the base station does not recognize the new beam reported by the UE (i.e. the spatial configuration adopted by the base station to send the response is different from the new beam reported by the UE), the base station needs to adopt one shot LBT when sending the response message (or called RAR) (or called Msg.2 or Msg.2for BFR).
7-7: if the base station does not recognize the new beam reported by the UE (i.e. the spatial configuration used by the base station to send the response is different from the new beam reported by the UE), the base station sends the response information (or referred to as RAR) (or referred to as msg.2 or msg.2for BFR) without LBT, and the response information can be sent directly after the UE sends msg.1 (or preamble or PRACH resource) for a fixed time (e.g. 4 slots, or after 3 slots, or 2 slots, or 1 slot, or other values).
7-8: if the base station does not recognize the new beam reported by the UE (i.e. the spatial configuration adopted by the base station to send the response is different from the new beam reported by the UE), a normal LBT procedure is required before sending the response message (or referred to as RAR) (or referred to as msg.2 or msg.2for BFR).
An embodiment of the present invention further provides a transmission apparatus based on beams in an unlicensed spectrum, as shown in fig. 2, the apparatus includes:
a determining unit 11, configured to determine whether a first preset condition or a second preset condition is satisfied before performing beam-based transmission on an unlicensed spectrum;
a first transmission unit 12 configured to, when a first preset condition is satisfied, employ LBT in performing beam-based transmission;
a second transmission unit 13, configured to, when a second preset condition is satisfied, directly transmit the channel or the reference signal or transmit the channel or the reference signal after a certain time interval without using LBT when performing beam-based transmission.
In the beam-based transmission apparatus in the unlicensed spectrum provided in the embodiment of the present invention, on the unlicensed spectrum, before performing beam-based transmission, it is determined whether a first preset condition or a second preset condition is satisfied, when the first preset condition is satisfied, LBT is used when performing beam-based transmission, and when the second preset condition is satisfied, LBT is not used when performing beam-based transmission, and a channel or a reference signal is directly transmitted or is transmitted after a certain time interval, so that it is possible to determine when LBT is used on an NR unlicensed spectrum and when LBT is not used and a channel or a reference signal can be directly transmitted.
Optionally, the first transmission unit 12 is configured to, when the base station is configured to send an aperiodic CSI-RS resource set, and the repetition is configured to be on, if the base station measures that a current channel is in an idle state in a predetermined time period before transmitting a first CSI-RS resource or multiple CSI-RS resources sent in a CSI-RS resource set time, directly transmit other CSI-RS resources except for sending the first CSI-RS resource or multiple CSI-RS resources that employ LBT, or transmit other CSI-RS resources after a time interval.
Optionally, the second transmission unit 13 is configured to, when the base station is configured to send the aperiodic CSI-RS resource set and the repetition is configured to be off, measure whether a current channel is in an idle state in a predetermined time period before transmitting each CSI-RS resource of the CSI-RS resource set, and if the current channel is in the idle state, directly transmit the CSI-RS resource or transmit the CSI-RS resource after a certain time interval.
Optionally, the second transmission unit 13 is configured to directly transmit the PDSCH or retransmit the PDSCH after a time interval when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PDSCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PDSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam; or within the preset time less than or equal to the preset time, the base station sends the PDCCH, and the high-layer signaling configuration tci-PresentInDCI is off;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDSCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PDSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PDSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Optionally, the second transmission unit 13 is configured to directly transmit the PDCCH or transmit the PDCCH after a certain time interval when any one of the following conditions is met:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PDCCH to be sent have the same spatial configuration, the same Txbeam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDCCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUCCH, and the PUCCH and a PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PDCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PDCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Optionally, the second transmission unit 13 is configured to directly transmit the PUSCH or retransmit the PUSCH at an interval after a certain time when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUSCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PUSCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has a PUSCH transmitted, and the PUSCH to be transmitted have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PUSCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Optionally, the second transmission unit 13 is configured to directly transmit the PUCCH or transmit the PUCCH after a certain time interval when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam, or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, in a predetermined time less than or equal to a predetermined time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends downlink transmission, and the downlink transmission and a PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PUCCH to be transmitted have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PUCCH, and the PUCCH to be sent have the same spatial configuration or the same Tx beam or the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PUSCH, and the PUSCH and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends uplink transmission, and the uplink transmission and a PUCCH to be sent have the same spatial configuration, the same Tx beam, the same Rx beam or a beam correspondance relationship between the Tx beam and the Rx beam;
on the unlicensed spectrum, the base station sends downlink transmission within a preset time less than or equal to a preset time;
on the unlicensed spectrum, the base station has sent uplink transmission within a predetermined time less than or equal to a predetermined time.
The predetermined time may be 25us, 16us, 9us or 4us, but is not limited thereto.
Optionally, the first transmitting unit 12 is configured to, after the beam failure occurs, after the base station receives a preamble sent by the UE for beam failure recovery, perform one of the following operations:
only one shot LBT is adopted when response information or RAR is sent;
sending response information or RAR only adopting normal LBT;
if the base station approves the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new beam reported by the UE, the base station performs a normal LBT procedure before sending response information or RAR.
Optionally, the second transmission unit 13 is configured to, after the beam failure occurs, perform one of the following operations after the base station receives the preamble for beam failure recovery sent by the UE:
directly sending response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station approves the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station does not recognize the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides a base station which comprises the transmission device based on the wave beam in the unlicensed spectrum.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (17)

1. A method for beam-based transmission in unlicensed spectrum, comprising:
on an unlicensed spectrum, before beam-based transmission, judging whether a first preset condition or a second preset condition is met;
adopting LBT when the first preset condition is met, and carrying out transmission based on the wave beam;
when a second preset condition is met, the LBT is not adopted when the beam-based transmission is carried out, and the channel or the reference signal is directly sent or sent after a period of time;
the employing LBT in beam-based transmission when a first preset condition is satisfied includes: when a base station is configured to send an aperiodic CSI-RS resource set and the repetition is configured to be on, if the base station measures that a current channel is in an idle state in a preset time period before transmitting a first or a plurality of CSI-RS resources sent in the CSI-RS resource set time, directly transmitting other CSI-RS resources or transmitting other CSI-RS resources after a certain time interval except for LBT (local binary transmission) adopted for transmitting the first or the plurality of CSI-RS resources;
when the second preset condition is satisfied, the LBT is not adopted when the beam-based transmission is performed, and directly transmitting the channel or the reference signal or transmitting the channel or the reference signal after a period of time includes: when the base station is configured to send the aperiodic CSI-RS resource set and the repetition is configured to be off, the base station measures whether a current channel is in an idle state in a preset time period before transmitting each CSI-RS resource of the CSI-RS resource set, and if the current channel is in the idle state, the base station directly transmits the CSI-RS resource or transmits the CSI-RS resource after a period of time.
2. The method of claim 1, wherein when the second preset condition is satisfied, and the transmitting the channel or the reference signal directly or after a certain time interval without using LBT for beam-based transmission comprises:
when any one of the following conditions is satisfied, the PDSCH is directly transmitted or is transmitted after a certain time interval:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted a DRS, and the DRS and a PDSCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PDSCH to be sent have the same spatial configuration; or within the preset time less than or equal to the preset time, the base station sends the PDCCH, and the high-layer signaling configuration tci-PresentInDCI is off;
on an unlicensed frequency spectrum, in a preset time less than or equal to a preset time, a base station sends a PDSCH, and the PDSCH and a PDSCH to be sent have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDSCH to be sent have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDSCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH has the same spatial configuration as a PDSCH to be transmitted;
on the unlicensed spectrum, within a predetermined time or less, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PDSCH to be transmitted.
3. The method of claim 1, wherein when the second preset condition is satisfied, and the transmitting the channel or the reference signal directly or after a certain time interval without using LBT for beam-based transmission comprises:
when any one of the following conditions is satisfied, the PDCCH is directly transmitted or transmitted after a certain time interval:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station transmits a DRS, and the DRS and a PDCCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PDCCH to be sent have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH to be sent have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDCCH to be sent have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDCCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH and a PDCCH to be transmitted have the same spatial configuration;
on the unlicensed spectrum, within a predetermined time or less, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PDCCH to be transmitted.
4. The method of claim 1, wherein when the second preset condition is satisfied, and the transmitting the channel or the reference signal directly or after a certain time interval without using LBT for beam-based transmission comprises:
and when any one of the following conditions is met, directly transmitting the PUSCH by the UE or transmitting the PUSCH after a certain time interval:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted a DRS, and the DRS and a PUSCH to be transmitted by a UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUSCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PDSCH, and the PDSCH and a PUSCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUSCH to be sent by UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set has the same spatial configuration as a PUSCH to be transmitted by a UE;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH has the same spatial configuration as a PUSCH to be transmitted by a UE;
on the unlicensed spectrum, within a predetermined time or less, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PUSCH to be transmitted by the UE.
5. The method of claim 1, wherein when the second preset condition is satisfied, and the transmitting the channel or the reference signal directly or after a certain time interval without using LBT for beam-based transmission comprises:
when any one of the following conditions is satisfied, the PUCCH is directly transmitted by the UE or is transmitted after a period of time:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUCCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUCCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a PDSCH, and the PDSCH and a PUCCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUCCH to be sent by UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set has the same spatial configuration as a PUCCH to be transmitted by a UE;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH has the same spatial configuration as a PUCCH to be transmitted by a UE;
on the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PUCCH to be transmitted by the UE.
6. The method of any of claims 2 to 5, wherein the having the same spatial configuration comprises: there is the same Tx beam or the same Rx beam or a beam correspondance relationship between Tx beam and Rx beam.
7. The method of claim 1, wherein when a first preset condition is met, employing LBT in beam-based transmission comprises:
after the beam failure occurs, after the base station receives the preamble sent by the UE for beam failure recovery, one of the following operations is performed:
only one shot LBT is adopted when response information or RAR is sent;
sending response information or RAR only adopting normal LBT;
if the base station approves the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new beam reported by the UE, the base station performs a normal LBT procedure before sending response information or RAR.
8. The method of claim 1, wherein when the second preset condition is satisfied, and the transmitting the channel or the reference signal directly or after a certain time interval without using LBT for beam-based transmission comprises:
after the beam failure occurs, after the base station receives the preamble sent by the UE for beam failure recovery, one of the following operations is performed:
directly sending response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station approves the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station does not recognize the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource.
9. An apparatus for beam-based transmission in unlicensed spectrum, comprising:
a determining unit configured to determine whether a first preset condition or a second preset condition is satisfied before performing beam-based transmission on an unlicensed spectrum;
a first transmission unit, configured to, when a first preset condition is satisfied, adopt LBT when performing beam-based transmission;
a second transmission unit, configured to directly transmit a channel or a reference signal or transmit the channel or the reference signal after a certain time interval without using LBT when beam-based transmission is performed when a second preset condition is satisfied;
the first transmission unit is further configured to, when the base station is configured to transmit the aperiodic CSI-RS resource set and the repetition is configured to be on, if the base station measures that the current channel is in an idle state within a predetermined time period before transmitting the first one or more CSI-RS resources transmitted in the CSI-RS resource set time, directly transmit other CSI-RS resources or transmit other CSI-RS resources after a time interval, except that LBT is used to transmit the first one or more CSI-RS resources;
the second transmission unit is further configured to, when the base station is configured to send the aperiodic CSI-RS resource set and the repetition is configured to be off, measure whether a current channel is in an idle state within a predetermined time period before transmitting each CSI-RS resource of the CSI-RS resource set, and if the current channel is idle, directly transmit the CSI-RS resource or transmit the CSI-RS resource after a period of time.
10. The apparatus of claim 9, wherein the second transmission unit is configured to transmit the PDSCH directly or after a certain time interval when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted a DRS, and the DRS and a PDSCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PDSCH to be sent have the same spatial configuration; or within the preset time less than or equal to the preset time, the base station sends the PDCCH, and the high-layer signaling configuration tci-PresentInDCI is off;
on an unlicensed frequency spectrum, in a preset time less than or equal to a preset time, a base station sends a PDSCH, and the PDSCH and a PDSCH to be sent have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDSCH to be sent have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDSCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH has the same spatial configuration as a PDSCH to be transmitted;
on the unlicensed spectrum, within a predetermined time or less, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PDSCH to be transmitted.
11. The apparatus of claim 9, wherein the second transmission unit is configured to send the PDCCH directly or after a certain time interval when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station transmits a DRS, and the DRS and a PDCCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDSCH, and the PDSCH and a PDCCH to be sent have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH to be sent have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PDCCH to be sent have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set and a PDCCH to be transmitted have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH and a PDCCH to be transmitted have the same spatial configuration;
on the unlicensed spectrum, within a predetermined time or less, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PDCCH to be transmitted.
12. The apparatus of claim 9, wherein the second transmission unit is configured to transmit the PUSCH directly by the UE or after a certain time interval, when any of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has transmitted a DRS, and the DRS and a PUSCH to be transmitted by a UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUSCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a PDSCH, and the PDSCH and a PUSCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUSCH to be sent by UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set has the same spatial configuration as a PUSCH to be transmitted by a UE;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH has the same spatial configuration as a PUSCH to be transmitted by a UE;
on the unlicensed spectrum, within a predetermined time or less, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PUSCH to be transmitted by the UE.
13. The apparatus according to claim 9, wherein the second transmission unit is configured to transmit the PUCCH directly by the UE or after a certain time interval when any one of the following conditions is satisfied:
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has sent a DRS, and the DRS and a PUCCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station sends a PDCCH, and the PDCCH and a PUCCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a PDSCH, and the PDSCH and a PUCCH to be sent by a UE have the same spatial configuration;
on an unlicensed spectrum, in a preset time less than or equal to a preset time, a base station sends a CSI-RS resource or a CSI-RS resource set, and the CSI-RS resource or the CSI-RS resource set and a PUCCH to be sent by UE have the same spatial configuration;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received an SRS resource or an SRS resource set, and the SRS resource or the SRS resource set has the same spatial configuration as a PUCCH to be transmitted by a UE;
on an unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, a base station has received a PUCCH, and the PUCCH has the same spatial configuration as a PUCCH to be transmitted by a UE;
on the unlicensed spectrum, within a predetermined time less than or equal to a predetermined time, the base station has received a PUSCH, and the PUSCH has the same spatial configuration as a PUCCH to be transmitted by the UE.
14. The apparatus of any of claims 10 to 13, wherein the having the same spatial configuration comprises: there is the same Tx beam or the same Rx beam or a beam correspondance relationship between Tx beam and Rx beam.
15. The apparatus of claim 9, wherein the first transmitting unit is configured to perform one of the following operations after a base station receives a preamble for beam failure recovery sent by a UE after a beam failure occurs:
only one shot LBT is adopted when response information or RAR is sent;
sending response information or RAR only adopting normal LBT;
if the base station approves the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new wave beam reported by the UE, the base station sends response information or adopts one shot LBT when RAR is carried out;
if the base station does not recognize the new beam reported by the UE, the base station performs a normal LBT procedure before sending response information or RAR.
16. The apparatus of claim 9, wherein the second transmission unit is configured to perform one of the following operations after the base station receives a preamble for beam failure recovery sent by the UE after the beam failure occurs:
directly sending response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station approves the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource;
if the base station does not recognize the new wave beam reported by the UE, the base station directly sends response information or RAR at a fixed time after the UE sends the Msg.1 or preamble or PRACH resource.
17. A base station, characterized in that it comprises the beam-based transmission means in the unlicensed spectrum according to any of claims 9 to 16.
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