US20230403057A1 - Wireless communication method, terminal device and network device - Google Patents

Wireless communication method, terminal device and network device Download PDF

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Publication number
US20230403057A1
US20230403057A1 US17/458,465 US202117458465A US2023403057A1 US 20230403057 A1 US20230403057 A1 US 20230403057A1 US 202117458465 A US202117458465 A US 202117458465A US 2023403057 A1 US2023403057 A1 US 2023403057A1
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resource
csi
bwp
subband
terminal device
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Zuomin WU
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • 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
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • 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
    • H04W72/0457—Variable allocation of band or rate
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Definitions

  • the embodiments of the present disclosure relate to the field of communications, and more particularly, to a method of wireless communication, a terminal device, and a network device.
  • the first BWP may be an activated BWP in a plurality of BWPs configured for the terminal device.
  • the first BWP is a downlink BWP.
  • the SRS resource occupies M frequency domain units on the first BWP, and at least two frequency domain units in the M frequency domain units are discontinuous, where M is a positive integer greater than 1.
  • the M1 frequency domain unit is continuous, and the M2 frequency domain unit is continuous.
  • any two adjacent frequency domain units in the M1 frequency domain units are discontinuous, and any two adjacent frequency domain units in the M2 frequency domain units are discontinuous.
  • the configuration information is used for indicating the SRS resource on the first BWP.
  • the configuration information is used for indicating the SRS resource on at least one subband included in the first BWP.
  • the configuration information includes a starting resource block (RB) of the SRS resource and a number of RB included in the SRS resource, on at least part of subband in the at least one subband included in the first BWP.
  • RB starting resource block
  • the configuration information includes N bit, the N bit has a corresponding relationship with a resource block (RB) group included in the first BWP, the N bit is used for indicating the SRS resource on the first BWP, and N is a positive integer.
  • RB resource block
  • the configuration information includes a starting resource block (RB) of the SRS resource and a number of RB included in the SRS resource, on at least part of subband in the at least one subband included in the unlicensed carrier.
  • RB starting resource block
  • the configuration information includes a starting resource block (RB) of the SRS resource and a number of RB included in the SRS resource on the first BWP.
  • RB starting resource block
  • the configuration information is used for determining that a resource, which is included in a guard band between two adjacent subbands in the at least two subbands, does not include the SRS resource.
  • the SRS resource occupies M frequency domain units on the first BWP, and at least two frequency domain units in the M frequency domain units are discontinuous, where M is a positive integer greater than 1.
  • the SRS resource is located on a first subband and a second subband in the at least two subbands
  • the M frequency domain units include M1 frequency domain units and M2 frequency domain units
  • the M1 frequency domain units are located on the first subband
  • the M2 frequency domain units are located on the second subband, where M1 and M2 are positive integers respectively.
  • the M1 frequency domain units are continuous, and the M2 frequency domain units are continuous.
  • any two adjacent frequency domain units in the M1 frequency domain units are discontinuous, and any two adjacent frequency domain units in the M2 frequency domain units are discontinuous.
  • the method further includes performing, by the network device, SRS measurement according to a valid SRS resource in the SRS resource, where the valid SRS resource includes a SRS resource in the SRS resource that is on a subband and a symbol occupied by the terminal device.
  • the valid SRS resource is determined according to first indication information sent by the terminal device, or the valid SRS resource is determined according to reference signal detection.
  • a terminal device configured to perform the method in the foregoing first aspect or in various implementations thereof.
  • a terminal device configured to perform the method in the foregoing third aspect or in various implementations thereof.
  • a network device configured to perform the method in the foregoing fourth aspect or in various implementations thereof.
  • the network device includes a functional module configured to perform the method in the foregoing fourth aspect or in various implementations thereof.
  • a network device including a processor and a memory.
  • the memory is configured to store a computer program
  • the processor is configured to call and run the computer program stored in the memory so as to perform the method in the foregoing second aspect or in various implementations thereof.
  • the apparatus includes a processor, configured to call and run a computer program stored in a memory, so that the apparatus performs the method in any of the foregoing first aspect to fourth aspect or in various implementations thereof.
  • a computer program product including a computer program instruction, and the computer program instruction causes a computer to perform the method in any of the foregoing first aspect to fourth aspect or in various implementations thereof.
  • a computer program when the computer program is run on a computer, the computer is caused to perform the method in any of the foregoing first aspect to fourth aspect or in various implementations thereof.
  • FIG. 7 is a schematic block diagram of a terminal device provided by an embodiment of the present disclosure.
  • FIG. 9 is another schematic block diagram of a terminal device provided by an embodiment of the present disclosure.
  • FIG. 10 is another schematic block diagram of a network device provided by an embodiment of the present disclosure.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • NR New Radio
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • the frequency spectrum applied is not limited by the embodiments of the present disclosure.
  • the embodiments of the present disclosure may be applied to a licensed frequency spectrum, and may also be applied to an unlicensed frequency spectrum.
  • the network device may be a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network side device in a 5G network or a network device in a future evolved Public Land Mobile Network (PLMN), etc.
  • PLMN Public Land Mobile Network
  • a 5G system or a 5G network may also be referred to as a New Radio (NR) system or an NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include a plurality of network devices, and other number of terminal devices may be included within the coverage area of each network device, which is not limited by the embodiments of the present disclosure.
  • the communication system 100 may also include other network entity such as a network controller, a mobile management entity and the like, which is not limited by the embodiments of the present disclosure.
  • network entity such as a network controller, a mobile management entity and the like, which is not limited by the embodiments of the present disclosure.
  • the device with a communication function in the network/system in the embodiments of the present disclosure may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with the communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which is not elaborated here; and the communication device may also include other device in the communication system 100 , for example, other network entity such as a network controller, a mobile management entity and the like, which is not limited in the embodiments of the present disclosure.
  • system and “network” herein are often used interchangeably herein.
  • the term “and/or” herein is only to describe a kind of association relationship among associated objects, and means that there may be three kinds of relationships. For example, A and/or B, may mean that there are the following three cases: A exists alone, A and B exist at the same time, and B exists alone.
  • the character “/” herein generally indicates that the associated objects before and after are in an “or” relationship.
  • a network device sends configuration information of a first resource to a
  • the terminal device receives the configuration information of the first resource sent by the network device.
  • the terminal device determines the first resource on a first BWP according to the configuration information.
  • the first BWP is a BWP on an unlicensed frequency spectrum, and the first BWP includes at least two subbands in a frequency domain.
  • the first resource may include a CSI-RS resource, a CSI-IM resource, or an SRS resource. If the first BWP is a downlink BWP, the first resource may include a CSI-RS resource and/or a CSI-IM resource; and if the first BWP is an uplink BWP, the first resource may include an SRS resource.
  • the unlicensed frequency spectrum is a frequency spectrum applicable to radio device communication that is divided by a country and region.
  • the frequency spectrum is usually considered to be a shared frequency spectrum, i.e., communication devices in different communication systems may use this frequency spectrum as long as the regulatory requirement on the frequency spectrum set by a country or a region is met, without applying for an exclusive frequency spectrum authorization from the government.
  • the communication device follows the principle of “Listen Before Talk (LBT)”, i.e., before the communication device sends a signal on a channel of the unlicensed frequency spectrum, channel sense needs to be performed first. Only when the channel sense result is that the channel is idle, the communication device is able to send the signal. If the channel sense result of the communication device on the channel of the unlicensed frequency spectrum is that the channel is busy, the communication device is unable to send the signal.
  • LBT Listen Before Talk
  • the duration for which the communication device performs signal transmission using the channel of the unlicensed frequency spectrum can not exceed Maximum Channel Occupancy Time (MCOT). If the power of a signal transmitted on the channel of the unlicensed frequency spectrum is too large, transmission of other important signal (such as a radar signal) on this channel is affected. In order to avoid this, when performing signal transmission using the channel of the unlicensed frequency spectrum, the communication device needs to follow the limitation that the signal transmit power does not exceed the maximum transmit power and the maximum transmit power spectral density.
  • MCOT Maximum Channel Occupancy Time
  • UE may be configured with a plurality of BWPs and only one BWP is activated.
  • the activated BWP includes a plurality of LBT subbands
  • a base station may perform PDSCH transmission through some or all of the LBT subbands included in the activated BWP according to the channel detection result of the LBT subbands.
  • a BWP0 configured by the base station for the UE includes two LBT subbands: a first subband and a second subband. The base station plans to transmit a PDSCH to the UE through scheduling the first subband and the second subband.
  • the base station transmits the Physical Downlink Shared Channel (PDSCH) to the UE through the first subband included in the BWP0.
  • PDSCH Physical Downlink Shared Channel
  • the subband included in the first BWP may include the LBT subband here, or may be a subband composed of a specific number of resource block(s) (RB), which should not be limited by the embodiments of the present disclosure.
  • the configuration information of the first resource is used for indicating the frequency domain location of the first resource, that is, the terminal device determines the frequency domain location of the first resource on the first BWP according to the configuration information.
  • the first resource may be configured by the network device for the terminal device.
  • the network device may perform configuration based on a BWP, an unlicensed carrier, a subband in a BWP, or a subband of an unlicensed carrier.
  • the terminal device may determine the first resource on the first BWP on the unlicensed carrier according to the configuration information of the first resource, and the first BWP may include at least two subbands in the frequency domain.
  • the terminal device may select a valid first resource from the configured first resource so as to perform communication or measurement.
  • the so-called valid first resource may refer to a first resource in the configured first resource in which a signal has actually been transmitted.
  • the first resource is a CSI-RS resource
  • the valid CSI-RS resource refers to a resource in the CSI-RS resource configured by the network device for the terminal device through which a CSI-RS has been sent
  • the valid CSI-RS resource refers to a CSI-RS resource in the CSI-RS resource configured by the network device for the terminal device that is on a subband and a symbol occupied by the network device. That is, the valid CSI-RS resource refers to a resource in the CSI-RS resource configured by the network device for the terminal device, this resource being on a subband of which the network device obtains the channel use right.
  • the configuration of the first resource may be implemented through the following manners.
  • the first resource is configured based on a BWP.
  • the configuration information may be used for indicating the first resource on the first BWP.
  • the terminal device may be configured with a plurality of BWPs, and the network device may configure the first resource on a respective BWP independently.
  • the network device may directly indicate to the terminal device a starting RB of the first resource on the first BWP and a number of RB(s) included in the first resource.
  • the network device may also indicate the first resource on the first BWP to the terminal device through a bitmap.
  • the configuration information includes N bit(s), the N bit(s) has a corresponding relationship with a resource block (RB) group included in the first BWP, the N bit(s) is used for indicating the first resource on the first BWP, and N is a positive integer.
  • a RB group may include one or more RBs, and a respective RB group included in the first BWP may include the same number of RB(s) or different numbers of RBs.
  • the N bits may correspond to the RB groups included in the first BWP one by one, or it may be that one bit corresponds to a plurality of RB groups, or it may be that a plurality of bits correspond to one RB group.
  • the first resource is configured based on a subband on a BWP.
  • the configuration information is used for indicating the first resource on at least one subband included in the first BWP.
  • the network device may configure the first resource on at least one subband included in each BWP independently.
  • the network device may indicate the first resource on each subband in the at least one subband included in the first BWP to the terminal device.
  • the configuration information may include a starting RB of the first resource and a number of RBs included in the first resource, on each in the at least one subband.
  • the configuration information may include a bitmap for indicating the first resource on each subband in the at least one subband.
  • the network device may also be configured with one criterion, and after the terminal device receives the configuration information, the first resource on at least one subband included in the first BWP may be determined in combination with information of the first BWP and subband information included in the first BWP.
  • the configuration information is used for indicating a resource except for first few RBs and last few RBs on each subband in the first two subbands on each BWP.
  • the first resource configured based on a subband on a BWP may be continuous, or may be discontinuous.
  • the configuration information includes K bit(s), the K bit(s) has a corresponding relationship with a resource block (RB) group included in the unlicensed carrier, the K bit(s) is used for indicating the first resource on the unlicensed carrier, and K is a positive integer.
  • the RB group may include one or more RBs, and each RB group included in the unlicensed carrier may include the same number of RBs or different numbers of RBs.
  • the N bits may correspond to the RB groups included in the unlicensed carrier one by one, or one bit may correspond to a plurality of RB groups, or a plurality of bits may correspond to one RB group.
  • the configuration information for indicating the first resource on the at least one subband may also include a starting RB of the first resource and a number of RBs included in the first resource, on each subband in part of the subbands, and a bitmap for indicating the first resource on each subband in the other part of the subbands.
  • the terminal device may first determine on which subbands on the first BWP the first resource is configured, and may further obtain the specific position of the configured first resource on these subbands.
  • the network device may indicate to the terminal device through the configuration information that the first resource is not included on a guard band between two adjacent subbands in the at least two subbands included in the first BWP.
  • the first resource is a CSI-RS resource, and the terminal device does not perform CSI-RS measurement on a resource included in a guard band between the two adjacent subbands.
  • the first resource is a CSI-IM resource, and the terminal device does not perform interference measurement on a resource included in a guard band between two adjacent subbands in the at least two subbands.
  • the first resource is an SRS resource, and the terminal device does not transmit an SRS on a resource included in a guard band between two adjacent subbands in the at least two subbands.
  • (M1+M2) may be equal to M, or may be smaller than M. If (M1+M2) being equal to M, the first resource is only located on the first subband and the second subband included in the first BWP. If (M1+M2) being smaller than M, the first resource may also be located on a third subband or a fourth subband included in the first BWP, that is, the first resource may also be located on other subband in addition to the first subband and the second subband.
  • the first resource may include a CSI-RS resource and/or a CSI-IM resource. If the first resource only includes the CSI-RS resource or the CSI-IM resource, configuration of the first resource may be implemented as any of the aforementioned manners. If the first resource includes both the CSI-RS resource and the CSI-IM resource, configuration of both of the CSI-RS resource and the CSI-IM resource may be implemented as any of the aforementioned manners. For example, the configuration information is used for indicating the CSI-RS resource on the first BWP and the CSI-IM resource on the first BWP.
  • the configuration information may include a starting RB of the CSI-RS resource and a number of RBs included in the CSI-RS resource on the first BWP, and a starting RB of the CSI-IM resource and a number of RBs included in the CSI-IM resource on the first BWP.
  • the first resource being a CSI-RS resource, a CSI-IM resource and an SRS resource.
  • the bandwidth size occupied by a frequency domain is configured through a CSI-FrequencyOccupation parameter.
  • startingRB represents the first RB occupied by the CSI-RS resource of which the reference point is the CRB 0, and the value can only be a multiple of 4.
  • nrofRBs represents a number of RBs occupied by the CSI-RS resource, the value can also only be a multiple of 4, and the minimum configuration parameter is min (24, bandwidth of the associated BWP). If the configuration parameter is greater than the bandwidth of the associated BWP, the UE should assume that the bandwidth of the actual CSI-RS transmission is equal to the bandwidth of the associated BWP.
  • the bandwidth of the associated BWP may be understood as the number of RBs included in the bandwidth of the associated BWP.
  • the network device may send first indication information to the terminal device, and the terminal device determines the valid CSI-RS resource according to the first indication information.
  • the terminal device may also determine the valid CSI-RS resource according to the detection of a reference signal.
  • the terminal device may detect the existence of the CSI-RS on the configured CSI-RS resource, and determine the valid CSI-RS resource according to the existence detection.
  • the terminal device performs existence detection according to serial correlation detection.
  • the terminal device may report target CSI corresponding to the configured CSI-RS resource to the network device.
  • the format or the bit size of the CSI reported by the terminal device to network device may be fixed, for example, be fixed to 16 bits.
  • the valid CSI-RS resource is only part of the resource in the configured CSI-RS resource, it is necessary to specify CSI corresponding to the invalid resource in the configured CSI-RS resource.
  • the valid CSI-RS resource includes a CSI-RS resource in the CSI-RS resource configured that is on a subband and a symbol occupied by the network device.
  • the target CSI may also include subband information corresponding to the first CSI.
  • the target CSI may not include measurement information on a resource included in a guard band between two adjacent subbands.
  • the network device configures to report one subbandy
  • the CSI information reported by the terminal device may be: a CSI report corresponding to time t0 is [0aaa]; a CSI report corresponding to time t1 is [1cccc]; and where 0aaaa represents the CSI on the subband 0 at time t0, and 1cccc represents the CSI on the subband 1 at time t1.
  • the reserve bit in case 2 or reporting any of previous valid CSI may also be adopted.
  • the CSI on a certain subband may include CSI obtained according to measurement of all the resource in the valid CSI-RS resource on the subband, such as wideband CSI on the subband (wideband CQI or wideband PMI on the subband, etc.), and may also include CSI obtained according to measurement of part of the resource in the valid CSI-RS on the subband, such as subband CSI on the subband (subband CQI or subband PMI on the subband, etc.), which is not limited by the embodiments of the present disclosure.
  • the first BWP is a downlink BWP.
  • the network device may not send any signal on the configured CSI-IM resource.
  • the terminal device may perform interference measurement through all or part of the configured CSI-IM resource.
  • the configured CSI-IM resource may include a second resource and/or a third resource, where the second resource includes a CSI-IM resource in the configured CSI-IM resource that is on a subband and a symbol occupied by the network device, in other words, the second resource includes part of the resource in the configured CSI-IM resource that is on a subband of which the network device obtains the channel use right in the frequency domain.
  • the third resource includes a CSI-IM resource in the configured CSI-IM resource that is on a subband or a symbol not occupied by the network device. In other words, the third resource includes part of the resource in the configured CSI-IM resource that is on a subband of which the network device does not obtain the channel use right in the frequency domain.
  • the terminal device may also combine the second resource and the third resource, and perform the interference measurement thereon. Furthermore, the terminal device may filter the result of interference measurement on the CSI-IM resource combined together.
  • the network device may send second indication information to the terminal device.
  • the terminal device receives the second indication information, and determines the second resource and/or the third resource according to the second indication information.
  • the first BWP is an uplink BWP.
  • the terminal device After obtaining the channel use right on the unlicensed carrier, the terminal device sends an SRS to the network device through all or part of the resource in the determined first resource, and the network device receives the SRS through all or part of the resource in the first resource.
  • the terminal device sends the SRS to the network device through a valid SRS resource in the configured SRS resource, the network device performs measurement according to the valid SRS resource in the configured SRS resource, and the valid SRS resource includes an SRS resource in the SRS resource configured that is on a subband and a symbol occupied by the terminal device.
  • the subband and the symbol occupied by the terminal device may refer to a time-frequency resource in which the terminal device obtains the channel use right.
  • the first BWP includes two subbands, a first subband and a second subband.
  • the terminal device performs channel detection on the first subband and the second subband, if the detection on the first subband succeeds and the detection on the second subband fails, then the terminal device transmits the SRS to the network device on the SRS resource on the first subband.
  • the SRS resource on the first subband is the valid SRS resource.
  • the SRS resource on the second subband may be an invalid SRS resource.
  • the configured SRS resource here may be a configured SRS resource on the first BWP, or may be a configured SRS resource on the unlicensed carrier.
  • the terminal device may send first indication information to the network device, and the network device determines the valid SRS resource according to the first indication information.
  • the network device may also determine the valid SRS resource according to the detection of a reference signal.
  • the network device may detect the existence of the SRS on the configured SRS resource, and determine the valid SRS resource according to the existence detection.
  • the network device performs existence detection according to serial correlation detection.
  • the network device performs measurement according to the valid SRS resource in the SRS resource, which may include that the network device performs at least one of channel measurement, interference measurement, timing estimation, frequency deviation estimation, and phase tracking, etc. on the SRS on the valid CSI-RS resource.
  • the network device performs the channel measurement on the SRS on the valid SRS resource, and thus may obtain at least one of: an SRS SINR, an RI, a PMI, a CQI and a beam direction, etc.
  • the SRS sent by the terminal device on the valid SRS resource does not support frequency hopping.
  • items included in configuration of a frequency domain resource of the SRS may be as shown in Table 1, and the SRS resource configuration on the unlicensed carrier only supports the SRS transmission in Table 1, and does not support frequency hopping.
  • the first SRS subsequence is transmitted through the M1 frequency domain unit(s) on the first subband
  • the second SRS subsequence is transmitted through the M2 frequency domain unit(s) on the second subband.
  • the first SRS subsequence and the second SRS subsequence are generated independently.
  • the configured SRS resource is located on the first subband and the second subband in the at least two subbands, the configured SRS resource occupies M frequency domain units in the frequency domain, M1 frequency domain unit(s) in the M frequency domain units is located on the first subband, M2 frequency domain unit(s) in the M frequency domain units is located on the second subband, and M is greater than or equal to (M1+M2).
  • an SRS sequence corresponding to the configured SRS resource is generated according to M frequency domain units, and the SRS sequence is transmitted through M frequency domain units.
  • what is transmitted on the first subband is part of the elements in the SRS sequence that matches M1 frequency domain unit(s)
  • what is transmitted on the second subband is part of the elements in the SRS sequence that matches M2 frequency domain unit(s) and is not overlapped with the element(s) on the first subband.
  • the M1 frequency domain units are continuous, and the M2 frequency domain units are continuous.
  • any two adjacent frequency domain units in the M1 frequency domain units are discontinuous, and any two adjacent frequency domain units in the M2 frequency domain units are discontinuous.
  • any two adjacent frequency domain units in the M1 frequency domain units are discontinuous and frequency domain intervals are equal, and any two adjacent frequency domain units in the M2 frequency domain units are discontinuous and the frequency domain intervals are equal. This is mainly because that on the unlicensed frequency spectrum, the specified power spectral density can not be exceeded when a signal is sent, and sending an uplink signal with a discretely distributed frequency domain resource may improve the transmit power of the uplink signal.
  • the network device may schedule the terminal device to perform downlink transmission or uplink transmission according to the measurement information.
  • configuration information of the first resource in the embodiments of the present disclosure may include configuration information of the first resource on the unlicensed carrier, and may also include configuration information of the first resource on the licensed carrier, in summary, other configuration information is ok, as long as the terminal device can determine the first resource on the BWP of the unlicensed carrier according to the configuration information.
  • the configuration information of the first resource, and/or the first indication information, and/or the second indication information in the embodiments of the present disclosure may be sent to the terminal device through an unlicensed carrier, or may be sent to the terminal device through a licensed carrier.
  • the configuration method of the first resource will be illustrated with a CSI-RS resource taken as an example.
  • the frequency domain resource included in a configured CSI-RS resource on a BWP0 is continuous.
  • the frequency domain resource included in the configured CSI-RS resource is determined according to the following two parameters: a starting RB (such as startingRB) and a number of RBs (such as nrofRBs).
  • the starting RB represents the first RB occupied by the configured CSI-RS resource of which the reference point is the CRB 0, and the value can only be a multiple of 4; and the number of RBs represents the number of RBs occupied by the configured CSI-RS resource, and the value can only be a multiple of 4, too.
  • the network device When the network device is performing transmission of a CSI-RS, due to failure of LBT on part of subbands (such as a subband 2 in FIG. 4 , i.e., an invalid resource), the network device can only perform CSI-RS transmission through part of subbands (such as a subband 0, a subband 1 and a subband 3 in FIG. 4 , i.e., valid CSI-RS resources) included in the BWP0. In this case, the terminal device needs to determine a frequency domain resource on which no CSI-RS is transmitted, for example, the terminal device determines a first reference point and/or a second reference point, and then determines that no CSI-RS transmission is performed on the subband 2 according to the two reference points. Furthermore, the terminal device performs CSI-RS reception according to the CSI-RS transmitted on the subband 0, the subband 1, and the subband 3.
  • the terminal device may determine the first reference point and/or the second reference point according to indication sent by the network device for determining the transmission bandwidth.
  • the terminal device may determine the first reference point and/or the second reference point according to the existence detection of the CSI-RS on different subbands.
  • the location of the first reference point and/or the second reference point is predefined, or is configured by the network device.
  • the terminal device determines that the frequency domain resource on which no CSI-RS is transmitted includes a guard band between two adjacent subbands.
  • Each subband is configured with a CSI-RS resource, and the terminal device determines the CSI-RS resource included in a BWP0 according to the subbands included in a first BWP.
  • a CSI-RS resource 0 is configured on a subband 0
  • a CSI-RS resource 1 is configured on a subband 1
  • a CSI-RS resource 2 is configured on a subband 2
  • a CSI-RS resource 3 is configured on a subband 3.
  • the CSI-RS resource configured on the BWP0 includes the CSI-RS resource 0, the CSI-RS resource 1, the CSI-RS resource 2, and the CSI-RS resource 3.
  • the frequency domain resource included in the CSI-RS resource on each subband is determined according to two parameters: a starting RB (such as startingRB) and a number of RBs (such as nrofRBs).
  • a guard band between two adjacent subbands does not include the CSI-RS resource, that is, the CSI-RS resource on two adjacent subbands is not continuous in the frequency domain.
  • corresponding CSI-RS patterns on the CSI-RS resource 0, the CSI-RS resource 1, the CSI-RS resource 2, and the CSI-RS resource 3 may be the same.
  • the network device When the network device is performing transmission of a CSI-RS, due to failure of LBT on part of the subbands (such as the subband 2 in FIG. 5 , i.e., the invalid resource), the network device can only perform CSI-RS transmission through part of the subbands (such as the subband 0, the subband 1 and a subband the in FIG. 5 , i.e., the valid CSI-RS resources) included in the BWP0. In this case, the network device has performed transmission on the CSI-RS resource 0, the CSI-RS resource 1 and the CSI-RS resource 3, and the terminal device may receive the CIS-RS on each subband independently, thereby determining reception of the first CSI-RS.
  • the CSI-RS resource is configured for each subband independently.
  • measurement of CSI-RS on different BWPs may be implemented through a combination of CSI-RS resources configured on different subbands, and the flexibility is high.
  • the BWP0 may include a plurality of non-overlapped and continuous RB groups, and the bitmap has a one-to-one mapping relationship with the RB groups included in the BWP0, where the first bit corresponds to the first RB group in the BWP0, and the starting location of the first RB group is determined according to the starting location N start of the BWP0, i.e., the index of the first RB in the first RB group is L*ceil (N start /L), where ceil represents rounding up.
  • FIG. 6 gives one example of the CSI-RS frequency domain resource configuration.
  • the network device When the network device is performing transmission of a CSI-RS, because of failure of LBT on part of the subbands (such as a subband 2 in FIG. 6 , i.e., an invalid resource), the network device can only perform CSI-RS transmission through part of the subbands (such as a subband 0, a subband 1 and a subband 3 in FIG. 4 , i.e., valid CSI-RS resources) included in the BWP0. In this case, the network device has performed transmission on CSI-RS resource on the subband 0, the subband 1 and the subband 3, and the terminal device may receive the CIS-RS on each subband independently, thereby determining reception of the CSI-RS.
  • the terminal device may determine the CSI-RS frequency domain resource for actual transmission according to indication sent by the network device for determining transmission bandwidth.
  • the terminal device may determine the CSI-RS frequency domain resource for actual transmission according to the existence detection of the CSI-RS on each subband.
  • independent configuration of the CSI-RS resource on each subband is implemented by the present embodiment through the manner of a bitmap, and the signaling indication is simple.
  • FIG. 7 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present disclosure.
  • the terminal device 300 includes a transceiver unit 310 , configured to receive configuration information of a first resource sent by a network device, where the first resource includes a channel state information reference signal (CSI-RS) resource and/or a channel state information interference measurement (CSI-IM) resource; and a processing unit 320 , configured to determine the first resource on a first bandwidth part (BWP) according to the configuration information, where the first BWP is a BWP on an unlicensed carrier, and the first BWP includes at least two subbands in a frequency domain.
  • CSI-RS channel state information reference signal
  • CSI-IM channel state information interference measurement
  • the configuration information is used for indicating the first resource on at least one subband included in the first BWP.
  • the configuration information includes a starting resource block (RB) of the first resource and a number of RB(s) included in the first resource, on at least part of subband in the at least one subband included in the first BWP.
  • RB starting resource block
  • the configuration information is used for indicating the first resource on at least one subband included in the unlicensed carrier
  • the processing unit is specifically configured to determine the first resource on the first BWP according to the configuration information and the subbands included in the first BWP.
  • the configuration information is used for determining that a resource, which is included in a guard band between two adjacent subbands in the at least two subbands, does not include the first resource.
  • the first resource occupies M frequency domain units on the first BWP, and at least two frequency domain units in the M frequency domain units are discontinuous, where M is a positive integer greater than 1.
  • the first resource is located on a first subband and a second subband in the at least two subbands
  • the M frequency domain units include M1 frequency domain unit and M2 frequency domain unit
  • the M1 frequency domain unit is located on the first subband
  • the M2 frequency domain unit is located on the second subband, where M1 and M2 are positive integers respectively.
  • the M1 frequency domain units are continuous, and the M2 frequency domain units are continuous.
  • the first resource includes a CSI-RS resource
  • the processing unit is further configured to perform channel state information (CSI) measurement according to a valid CSI-RS resource in the CSI-RS resource, where the valid CSI-RS resource includes a CSI-RS resource in the CSI-RS resource that is on a subband and a symbol occupied by the network device.
  • CSI channel state information
  • the valid CSI-RS resource is determined according to first indication information sent by the network device, or the valid CSI-RS resource is determined according to reference signal detection.
  • the first resource includes a CSI-RS resource
  • the transceiver unit is further configured to report target CSI corresponding to the CSI-RS resource to the network device, where the target CSI includes first CSI, the first CSI is obtained according to measurement of a valid CSI-RS resource in the CSI-RS resource, and the valid CSI-RS resource includes a CSI-RS resource in the CSI-RS resource that is on a subband and a symbol occupied by the network device.
  • the target CSI includes a preset bit, and the preset bit is used for indicating measurement information corresponding to an invalid CSI-RS resource in the CSI-RS resource; or, the target CSI includes second CSI, and the second CSI is CSI obtained from most recent valid measurement corresponding to an invalid CSI-RS resource in the CSI-RS resource, where the invalid CSI-RS resource includes a CSI-RS resource in the CSI-RS resource that is on a subband or a symbol not occupied by the network device.
  • the target CSI includes subband information corresponding to the first CSI.
  • the target CSI does not include measurement information of a resource included in a guard band between two adjacent subbands in the at least two subbands.
  • the first resource includes a CSI-IM resource
  • the processing unit is further configured to perform interference measurement on a second resource, where the second resource includes a CSI-IM resource in the CSI-IM resource that is on a subband and a symbol occupied by the network device; and/or, perform interference measurement on a third resource, where the third resource includes a CSI-IM resource in the CSI-IM resource that is on a subband or a symbol not occupied by the network device.
  • the terminal device does not perform interference measurement on a resource included in a guard band between two adjacent subbands in the at least two subbands.
  • the transceiver unit is further configured to receive second indication information sent by the network device, where the second indication information is used for determining the second resource and/or the third resource.
  • terminal device 300 may correspond to the terminal device in the method embodiments of the present disclosure, and the aforementioned and other operation and/or function of each unit in the terminal device 300 are used to implement the corresponding process of the terminal device in the method of FIG. 2 , which is not elaborated here for simplicity.
  • FIG. 8 shows a schematic block diagram of a network device 400 according to an embodiment of the present disclosure.
  • the network device 400 includes a transceiver unit 410 , configured to send configuration information of a first resource to a terminal device, where the configuration information is used for determining the first resource on a first bandwidth part (BWP) by the terminal device, the first BWP is a BWP on an unlicensed carrier, the first BWP includes at least two subbands in a frequency domain, and the first resource includes a channel state information reference signal (CSI-RS) resource and/or a channel state information interference measurement (CSI-IM) resource.
  • CSI-RS channel state information reference signal
  • CSI-IM channel state information interference measurement
  • the configuration information is used for indicating the first resource on the first BWP.
  • the configuration information is used for indicating the first resource on at least one subband included in the first BWP.
  • the configuration information includes a starting resource block (RB) of the first resource and a number of RB(s) included in the first resource on at least part of subband in the least one subband included in the first BWP.
  • RB starting resource block
  • the configuration information includes N bit(s), the N bit(s) has a corresponding relationship with a resource block (RB) group included in the first BWP, the N bit(s) is used for indicating the first resource on the first BWP, and N is a positive integer.
  • RB resource block
  • the configuration information is used for indicating the first resource on at least one subband included in the unlicensed carrier.
  • the configuration information includes a starting resource block (RB) of the first resource and a number of RB(s) included in the first resource, on at least part of subband in the at least one subband in the unlicensed carrier.
  • RB starting resource block
  • the configuration information includes K bit(s), the K bit(s) has a corresponding relationship with a resource block (RB) group included in the unlicensed carrier, the K bit(s) is used for indicating the first resource on the unlicensed carrier, and K is a positive integer.
  • the configuration information includes a starting resource block (RB) of the first resource and a number of RB(s) included in the first resource on the first BWP.
  • RB starting resource block
  • the configuration information is used for determining that a resource, which is included in a guard band between two adjacent subbands in the at least two subbands, does not include the first resource.
  • the first resource occupies M frequency domain units on the first BWP, and at least two frequency domain units in the M frequency domain units are discontinuous, where M is a positive integer greater than 1.
  • the first resource is located on a first subband and a second subband in the at least two subbands
  • the M frequency domain units include M1 frequency domain unit(s) and M2 frequency domain unit(s)
  • the M1 frequency domain unit(s) is located on the first subband
  • the M2 frequency domain unit(s) is located on the second subband, where M1 and M2 are positive integers respectively.
  • the first resource includes a CSI-RS resource
  • the transceiver unit is further configured to send first indication information to the terminal device, where the first indication information is used for determining a valid CSI-RS resource in the CSI-RS resource, and the valid CSI-RS resource includes a CSI-RS resource in the CSI-RS resource that is on a subband and a symbol occupied by the network device.
  • the target CSI includes a preset bit, and the preset bit is used for indicating measurement information corresponding to an invalid CSI-RS resource in the CSI-RS resource; or, the target CSI includes second CSI, and the second CSI is CSI obtained from most recent valid measurement corresponding to an invalid CSI-RS resource in the CSI-RS resource, where the invalid CSI-RS resource includes a CSI-RS resource in the CSI-RS resource that is on a subband or a symbol not occupied by the network device.
  • the target CSI includes subband information corresponding to the first CSI.
  • the target CSI does not include measurement information of a resource included in a guard band between two adjacent subbands in the at least two subbands.
  • the first resource includes a CSI-IM resource
  • the transceiver unit is further configured to send second indication information to the terminal device, the second indication information is used for determining a second resource and/or a third resource
  • the second resource includes a CSI-IM resource in the CSI-IM resource that is on a subband and a symbol occupied by the network device
  • the third resource includes a CSI-IM resource in the CSI-IM resource that is on a subband or a symbol not occupied by the network device.
  • the network device 400 may correspond to the network device in the method embodiments of the present disclosure, and the aforementioned and other operation and/or function of each unit in the network device 400 are used to implement the corresponding process of the network device in the method of FIG. 2 , which is not elaborated here for simplicity.
  • the memory 520 may be one independent device independent of the processor 510 , or may be integrated into the processor 510 .
  • the transceiver 530 may include a transmitter and a receiver.
  • the transceiver 530 may further include an antenna, and the number of antenna may be one or more.
  • an embodiment of the present disclosure also provides a network device 600 .
  • the network device 600 may be the network device 400 in FIG. 6 , which can be used for performing content of the network device corresponding to the methods in FIG. 6 and FIG. 9 .
  • the network device 600 shown in FIG. 10 includes a processor 610 , and the processor 610 may call and run a computer program from a memory to implement the method in the embodiments of the present disclosure.
  • the memory 620 may be one independent device independent of the processor 610 , or may be integrated into the processor 610 .
  • the network device 600 may further include a transceiver 630 , and the processor 610 may control the transceiver 630 to communicate with other device. Specifically, information or data may be sent to other device, or information or data sent by other device may be received.
  • the network device 600 may be the network device of the embodiments of the present disclosure, and the network device 600 may realize the corresponding process realized by network device in each method of the embodiments of the present disclosure, which is not elaborated here for simplicity.
  • the transceiver unit in the network device 400 may be realized by the transceiver 630 in FIG. 10 .
  • FIG. 11 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure.
  • the apparatus 700 shown in FIG. 11 includes a processor 710 , and the processor 710 may call and run a computer program from a memory to implement the method in the embodiments of the present disclosure.
  • the apparatus 700 may further include a memory 720 .
  • the processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiments of the present disclosure.
  • the memory 720 may be one independent device independent of the processor 710 , or may be integrated into the processor 710 .
  • the apparatus 700 may further include an input interface 730 .
  • the processor 710 may control the input interface 730 to communicate with other devices or apparatus. Specifically, information or data sent by other devices or apparatus may be obtained.
  • the apparatus 700 may further include an output interface 740 .
  • the processor 710 may control the output interface 740 to communicate with other device or apparatus. Specifically, information or data may be output to other devices or apparatus.
  • the apparatus is applicable to the network device in the embodiments of the present disclosure, and the apparatus may realize the corresponding process realized by network device in each method of the embodiments of the present disclosure, which is not elaborated here for simplicity.
  • the apparatus mentioned in embodiments of the present disclosure may also be referred to as a system-level-chip, a system chip, a chip system or a system-on-chip, etc.
  • the terminal device 810 may be configured to realize the corresponding functions realized by the terminal device in the foregoing methods
  • the network device 820 may be configured to realize the corresponding functions realized by the network device in the foregoing methods, which is not elaborated here for simplicity.
  • the processor of the embodiments of the present disclosure may be a type of integrated circuit chip, with a signal processing capability.
  • each step of the foregoing method embodiments may be completed through integrated logic circuits of hardware or instructions in the form of software in the processor.
  • the foregoing processor may be a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • Each method, step and logic block diagram disclosed in the embodiments of the present disclosure may be realized or performed.
  • the general-purpose processor may be a microprocessor, or the processor may also be any conventional processor, etc.
  • RAM Direct Rambus RAM
  • SRAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • DDR SDRAM Double Data Rate SDRAM
  • ESDRAM Enhanced SDRAM
  • SLDRAM Synchlink DRAM
  • DR RAM Direct Rambus RAM
  • the computer-readable storage medium is applicable to the communication device in the embodiments of the present disclosure, and the computer program causes a computer to perform the corresponding processes implemented by the mobile terminal/communication device in each method of the embodiments of the present disclosure, which is not elaborated here for simplicity.
  • the embodiments of the present disclosure also provide a computer program product, including a computer program instruction.
  • the computer program product is applicable to the communication device in the embodiments of the present disclosure
  • the computer program instruction causes a computer to perform the corresponding processes implemented by the mobile terminal/communication device in each method of the embodiments of the present disclosure, which is not elaborated here for simplicity.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function may also be stored in a computer-readable storage medium if being realized in the form of a software functional unit and sold or used as an independent product.
  • the essence of the technical solution of the present disclosure or the part contributing to the related art or part of the technical solution may be embodied in the form of a software product, and the computer software product is stored in a storage medium including several instructions such that a computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the method described in each embodiment of the present disclosure.
  • the aforementioned storage medium includes a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk and other mediums that can store program codes.

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CN113596880A (zh) 2021-11-02
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