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WO2018192343A1 - 参考信号的发送方法、基站以及用户设备 - Google Patents

参考信号的发送方法、基站以及用户设备 Download PDF

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Publication number
WO2018192343A1
WO2018192343A1 PCT/CN2018/080558 CN2018080558W WO2018192343A1 WO 2018192343 A1 WO2018192343 A1 WO 2018192343A1 CN 2018080558 W CN2018080558 W CN 2018080558W WO 2018192343 A1 WO2018192343 A1 WO 2018192343A1
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WO
WIPO (PCT)
Prior art keywords
time
frequency resource
base station
information
resource information
Prior art date
Application number
PCT/CN2018/080558
Other languages
English (en)
French (fr)
Inventor
袁璞
罗俊
刘瑾
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18787762.6A priority Critical patent/EP3579484B1/en
Publication of WO2018192343A1 publication Critical patent/WO2018192343A1/zh
Priority to US16/657,759 priority patent/US11128420B2/en

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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
    • H04L5/0091—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
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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
    • 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
    • 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
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment

Definitions

  • the present invention relates to the field of computer and communication technologies, and in particular, to a method for transmitting a reference signal, a base station, a user equipment (English: User Equipment, UE), and a network system.
  • a typical scenario of mobility management is that when a UE in a radio resource control connection (English: Radio Resource Control_CONNECTED, RRC_CONNECTED) state moves between cells, it is necessary to perform cell handover in time to avoid loss of connection.
  • the measurement based on the reference signal is a basic action in the cell handover process.
  • the UE measures the reference signal received power (RSRP) of the reference signal transmitted by each cell at the current location, and sends the measurement result to the base station.
  • the base station determines whether to perform cell handover on the UE according to the received measurement result and the saved handover management algorithm.
  • RSRP reference signal received power
  • the reference signal carrying the above function is a Cell Specific Reference Signal (CRS).
  • CRS Cell Specific Reference Signal
  • an LTE network CRS is continuously transmitted and occupies a fixed time-frequency resource.
  • the air interface resource between the base station and the UE is relatively tight.
  • the existing CRS transmission mode consumes a large amount of air interface resources.
  • a method for transmitting a reference signal including:
  • the base station If the predetermined handover preparation condition is met, the base station notifies the neighboring cell to send a downlink reference signal to the UE by using the time-frequency resource configured by the base station, and the neighboring cell does not need to send a downlink reference signal to the UE before being notified. ,as well as
  • the base station notifies the UE to receive a downlink reference signal by using a time-frequency resource configured by the base station.
  • the neighboring cell does not need to send the downlink reference signal to the UE before obtaining the foregoing notification by the base station to which the serving cell belongs.
  • the neighboring cell may transmit other data using the configured resources before receiving the above notification.
  • the notifying a neighboring cell to send a downlink reference signal to the UE by using a time-frequency resource configured by the base station including:
  • the base station sends a notification message to the neighboring cell, where the notification message carries the time-frequency resource information, and the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the base station to which the serving cell belongs is notified to the base station to which the neighboring cell belongs by using the time-frequency resource information of the configured time-frequency resource through the X2 interface between the base stations, so that the neighboring cell sends the downlink reference to the UE by using the configured time-frequency resource. signal.
  • the time-frequency resource information includes time domain resource information and frequency domain resource information for indicating the RE, and the frequency domain resource information is used to indicate the subcarrier and time domain resource information to which the RE used to transmit the downlink reference signal belongs in the frequency domain. Indicates the symbol to which the RE used to transmit the downlink reference signal belongs in the time domain.
  • the base station notifies the neighboring cell to send the downlink reference signal to the UE by using the time-frequency resource configured by the base station in a display or implicit manner.
  • the display notification manner includes notifying the time-frequency resource used by the UE by one or more neighboring cells through a channel such as a physical broadcast channel of the serving cell or a dedicated RRC signaling.
  • the implicit notification mode includes notifying the UE of time-frequency resources used by one or more neighboring cells by means of scrambling the PBCH of the serving cell.
  • the advantage of the implicit notification method is that it does not need to occupy additional air interface resources, which can save air interface resources.
  • the base station notifies the UE to receive a downlink reference signal by using a time-frequency resource configured by the base station, including:
  • the base station sends the indication signaling to the UE by using a physical channel other than the physical broadcast channel of the serving cell, where the indication signaling carries the time-frequency resource information.
  • the base station notifies the UE to receive a downlink reference signal by using a time-frequency resource configured by the base station, including:
  • the base station notifies the UE of the time-frequency resource information by using a physical broadcast channel of the serving cell.
  • the base station notifies the UE to receive a downlink reference signal by using a time-frequency resource configured by the base station, including:
  • the base station notifies the UE of the partial information in the time-frequency resource information by using a physical broadcast channel of the serving cell;
  • the base station sends the indication signaling to the UE by using a physical channel other than the physical broadcast channel, where the indication signaling carries the remaining information except the partial information in the time-frequency resource information.
  • the base station notifies the UE to receive a downlink reference signal by using a time-frequency resource configured by the base station, including:
  • the base station encodes the time-frequency resource information to obtain a coding result
  • the physical broadcast channel of the serving cell is scrambled using the pseudo random sequence.
  • the base station notifies the UE to receive a downlink reference signal by using a time-frequency resource configured by the base station, including:
  • the base station encodes the time-frequency resource information to obtain a coding result
  • the base station inputs part of the information in the coding result into a shift register to obtain a pseudo random sequence
  • the base station notifies the UE of the coding result by using a physical broadcast channel of the serving cell, and the remaining information except the part of the information, and scrambling the physical broadcast channel by using the pseudo random sequence.
  • the embodiment of the present application further provides another notification manner.
  • the network side device and the UE which are examples of the base station, store the same index table in advance.
  • the index table stores the correspondence between the time-frequency resource information index and the time-frequency resource information.
  • the time-frequency resource index may be replaced by the time-frequency resource index. Since the data volume of the time-frequency resource information index is much smaller than the time-frequency resource information, the transmission resources between the base stations can be saved, and the air interface resources between the base station and the UE can be saved, thereby further improving resource utilization.
  • the notifying a neighboring cell to send a downlink reference signal to the UE by using a time-frequency resource configured by the base station including:
  • the base station sends a notification message to the neighboring cell, where the notification message carries a time-frequency resource information index, where the time-frequency resource information index is used to search for a corresponding frequency resource information index from a pre-stored index table.
  • the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the base station notifying the UE to receive the downlink reference signal by using the time-frequency resource configured by the base station includes:
  • the base station sends the indication signaling to the UE, where the indication signaling carries the time-frequency resource information index.
  • the configured time-frequency resource can be reclaimed by using a specific mechanism, so that the network side can reuse the above-mentioned
  • the configured time-frequency resource sends service data to the UE.
  • the method further includes:
  • the base station notifies the neighboring cell to stop sending the downlink to the UE by using the configured time-frequency resource according to the measurement result obtained by the UE measuring the downlink reference signal received by the configured time-frequency resource. Reference signal.
  • the time-frequency resource information includes time domain resource information, frequency domain resource information, and valid time information, where the effective time information is used to indicate the base station configuration.
  • the time-frequency resource is used to send a downlink reference signal.
  • the neighboring cell stops using the configured time-frequency resource to send a downlink reference signal to the UE.
  • a method for receiving a reference signal including:
  • the user equipment UE determines the time-frequency resource configured by the base station according to the notification of the base station, where the base station is a base station to which the serving cell of the UE belongs;
  • the downlink reference signal is received by using the time-frequency resource configured by the base station.
  • the UE provided by the embodiment of the present application can receive the downlink reference signal by using the time-frequency resource configured by the base station according to the notification of the base station to which the serving cell belongs, thereby improving the pertinence of receiving the downlink reference signal, and contributing to saving the energy consumption of the UE.
  • the determining, by the UE, the time-frequency resources configured by the base station according to the notification of the base station including:
  • the UE receives the indication signaling sent by the base station on a physical channel other than the physical broadcast channel of the serving cell, where the indication signaling carries the time-frequency resource information, and the time-frequency resource The information is used to indicate the time-frequency resource of the configuration.
  • the UE determines the time-frequency resources configured by the base station according to the notification of the base station, including:
  • the UE receives time-frequency resource information sent by the base station in a physical physical broadcast channel of the serving cell, where the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the UE determines the time-frequency resources configured by the base station according to the notification of the base station, including:
  • the UE receives the indication signaling sent by the base station on a physical channel other than the physical broadcast channel of the serving cell, where the indication signaling carries the part of the time-frequency resource information The rest of the information;
  • the UE performs a combining process on the partial information in the time-frequency resource information and the remaining information except the partial information in the time-frequency resource information, and determines that the merge processing result is the time-frequency resource information,
  • the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the UE determines the time-frequency resources configured by the base station according to the notification of the base station, including:
  • the physical physical broadcast channel is scrambled, descrambling the scrambled physical physical broadcast channel to determine that the descrambling result is a pseudo-random sequence
  • the pseudo-random sequence is decoded to determine the decoding result as the time-frequency resource information, and the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the UE determines the time-frequency resources configured by the base station according to the notification of the base station, including:
  • the physical physical broadcast channel is scrambled, descrambling the scrambled physical physical broadcast channel to determine that the descrambling result is a pseudo-random sequence
  • the UE performs a combining process on the partial information in the time-frequency resource information and the remaining information except the partial information in the time-frequency resource information, and determines that the merge processing result is the time-frequency resource information,
  • the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the UE determines the time-frequency resources configured by the base station according to the notification of the base station, including:
  • the time-frequency resource information corresponding to the time-frequency resource information index is searched from the stored index table, where the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the method further includes:
  • the UE measures the downlink reference signal received on the configured time-frequency resource, and reports the measurement result to the base station.
  • the base station to which the serving cell belongs is configured to confirm whether the previously configured time-frequency resource is reclaimed according to the measurement result that is measured by the UE and the downlink reference signal received on the configured time-frequency resource, thereby further improving resource utilization. .
  • a base station is provided, the base station being a base station to which the serving cell of the UE belongs, the device having the function of implementing the method of the first aspect or any one of the foregoing possible implementation manners.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • a UE in a fourth aspect, the UE having the function of implementing the method of the second aspect described above or any one of the possible implementation manners of the foregoing second aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the embodiment of the present application provides a computer storage medium, configured to store computer software instructions used by the packet forwarding device, including any one of the foregoing first aspect or the foregoing first aspect.
  • the embodiment of the present application provides a computer storage medium, configured to store computer software instructions used by the packet forwarding device, including any one of the foregoing second aspect or the second aspect.
  • the embodiment of the present application provides a system for transmitting a reference signal, where the system includes the base station according to the third aspect, and the UE according to the fourth aspect.
  • FIG. 1A is a flowchart of a method for adding an application icon in a folder according to an embodiment of the present invention
  • FIG. 1 is a schematic diagram of a scenario applied to a method for transmitting a reference signal according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present application
  • FIG. 3 is a flowchart of another method for transmitting a reference signal according to an embodiment of the present application
  • FIG. 4 is a flowchart of a method for transmitting a reference signal according to another embodiment of the present application.
  • FIG. 5 is a flowchart of a method for sending a reference signal according to another embodiment of the present disclosure
  • FIG. 6 is a flowchart of a method for transmitting a reference signal according to another embodiment of the present application.
  • FIG. 7 is a flowchart of a method for sending a reference signal according to another embodiment of the present application.
  • FIG. 8 is a flowchart of a method for sending a reference signal according to another embodiment of the present disclosure.
  • FIG. 9 is a flowchart of a method for transmitting a reference signal according to another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a base station according to another embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a UE according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a UE according to another embodiment of the present disclosure.
  • the embodiment of the present application provides a transmission scheme of a reference signal.
  • the network side device does not need to use the fixed time-frequency resource to continuously transmit the downlink reference signal, but uses the configurable time-frequency resource to transmit the downlink reference signal in a part of the time period according to requirements.
  • the network side device which is an example of a base station, determines that a time-frequency resource for transmitting a downlink reference signal is configured for a cell, and indicates that at least one cell is in a shorter time according to the configuration information, according to an actual situation, when it is confirmed that the downlink reference signal needs to be sent.
  • the downlink reference signal is transmitted internally.
  • the time-frequency resource used for transmitting the downlink reference signal can be used to transmit other data, thereby saving the time-frequency resource used for transmitting the downlink reference signal and improving the utilization of the air interface resource.
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.
  • the base station 1 is a base station to which the current serving cell of the UE belongs
  • the base station 2 is a base station to which the neighboring cell of the UE belongs.
  • the present embodiment mainly focuses on a scenario in which the current serving cell and the neighboring cell of the UE belong to different base stations, although the current serving cell and the neighboring cell of the UE may belong to the same base station.
  • the base station 1 and the base station 2 exchange signaling through the X2 interface.
  • the serving cell refers to a cell that provides uplink and downlink data transmission for the UE.
  • the UE in FIG. 1 is in an RRC_CONNECTED state, a Radio Resource Control_IDLE, RRC_IDLE state, or a Radio Resource Control_Inactive (RRC_Inactive) state.
  • the RRC_CONNECTED state and the RRC_IDLE state may refer to the description in the LTE standard.
  • the RRC_Inactive state is a state that is still under discussion in the New Radio (NR) standard.
  • the UE in the RRC_Inactive state has the following feature:
  • the network side retains context information of the UE in RRC_INACTIVE.
  • the network side can know the location of the UE in the RRC_INACTIVE state at the RNA layer, that is, the network layer can know which RNA the UE is in. When the UE in RRC_INACTIVE moves out of the RNA before it, the network side can be aware.
  • the base station 1 can transmit information to the UE by means of a broadcast channel, dedicated signaling, or the like.
  • FIG. 2 is a flowchart of a method for transmitting a reference signal provided by an embodiment of the present application.
  • the method for transmitting the reference signal will be mainly described from the perspective of the base station to which the current serving cell of the UE belongs, that is, the base station 1 in FIG.
  • the base station in the following embodiments refers to the base station to which the current serving cell of the UE belongs, unless otherwise specified.
  • Step 21 The base station receives a measurement result of a downlink reference signal sent by the UE to the serving cell of the UE, where the base station is a base station to which the serving cell of the UE belongs.
  • the downlink reference signal is pre-defined and occupies certain resource particles (English: Resource Element, RE) in the time-frequency resource grid.
  • RE is the smallest time-frequency resource unit in an LTE network.
  • Each antenna port of the base station corresponds to a different time-frequency resource grid and corresponds to a reference signal, wherein the time-frequency resource grid describes the position of one or more REs in the time domain and the frequency domain in a two-dimensional grid manner. .
  • the time-frequency resources corresponding to different ports are different.
  • the time-frequency resource information may be indicated by the time-frequency resource information, where the time-frequency resource information includes time domain resource information and frequency domain resource information for indicating the RE, and the frequency domain resource information is used to indicate the RE frequency used for transmitting the downlink reference signal.
  • the subcarrier and time domain resource information to which the domain belongs is used to indicate the information of the symbol to which the RE used to transmit the downlink reference signal belongs in the time domain.
  • the location of the RE used to transmit the downlink reference signal in the time domain frequency domain can be determined by the time domain resource information and the frequency domain resource information.
  • the time-frequency resource information further includes beam indication information, where the beam indication information is used to indicate a beam used by the UE when receiving the reference signal.
  • the neighboring cell sends the downlink reference signal on the corresponding beam.
  • the UE receives the reference signal using beamforming techniques to obtain a gain effect in a particular direction.
  • the set of antenna ports supported by a cell depends on the reference signal configuration of the cell.
  • the downlink reference signal includes the following types: a cell-specific reference signal (CRS), a UE-specific reference signal (English: UE-specific reference signal), and a positioning reference signal. :Positioning reference signal) and channel state information reference signal (English: Channel State Information-Reference Signals, CSI-RS).
  • CRS cell-specific reference signal
  • UE-specific reference signal UE-specific reference signal
  • CSI-RS channel state information reference signal
  • the purpose of the CSI-RS is to support channel quality feedback for multiple antenna ports.
  • the CSI-RS reference signal sequence consists of a series of reference symbols, each of which occupies one RE.
  • the downlink reference signal of the serving cell in the embodiment of the present application is a CSI-RS.
  • the CSI-RS sequences transmitted by the cells are the same, and the time-frequency resources used for transmitting CSI-RS sequences to each UE are different.
  • CSI-RS sequence It can be calculated according to formula (1).
  • C init is a pseudo-random sequence initialization
  • n s is a slot number in a system frame
  • the value ranges from 0 to 19
  • l is a symbol number in a slot.
  • It is a cell identifier, such as a physical cell identifier (English: Physical Cell Identifier, PCI).
  • the serving cell uses the system information (English: System Information, SI), such as the main information block (English: MasterInformationBlock, MIB) or the system information block (English: SystemInformationBlock, SIB), and uses the time-frequency resource used by the downlink reference signal transmitted by the serving cell.
  • SI system Information
  • the information is informed to the UE.
  • the UE measures the RSRP of the serving cell, that is, the UE receives the average value of the downlink reference signal power of the serving cell on the specified time-frequency resource, and reports the measurement result to the base station of the serving cell.
  • Step 22 The base station determines, according to the measurement result received in step 21, whether the handover preparation condition is met.
  • the handover preparation condition may be configured according to an actual situation.
  • the handover preparation condition may be that the signal quality of the serving cell is lower than a set threshold, and the time that is lower than the set threshold exceeds a predetermined time.
  • the base station confirms whether the handover preparation condition is met according to the measurement result reported by the UE.
  • the confirmation that the handover preparation condition is satisfied may be regarded as a trigger event in which the base station configures the neighboring cell to configure the time-frequency resource for transmitting the downlink reference signal.
  • steps 23 and 24 are performed. If the handover preparation condition is satisfied, steps 23 and 24 are performed. If the handover preparation condition is not met, the process returns to step 21, and the base station continues to receive the measurement result of the downlink reference signal of the serving cell reported by the UE.
  • Step 23 The base station notifies the neighboring cell to send the downlink reference signal to the UE by using the time-frequency resource configured by the base station.
  • the base station stores time-frequency resource information that is currently available for the network side to transmit the downlink reference signal.
  • the base station configures one or more neighboring cells to respectively allocate time-frequency resources for transmitting the downlink reference signal to the UE.
  • the base station can notify the base station to which the neighboring cell belongs by using the configured time-frequency resource through the X2 interface. Taking two neighboring cells as an example, the base station to which the serving cell belongs informs the base station to which the neighboring cell 1 belongs, and allocates the time-frequency resource allocated to the neighboring cell 1 to the neighboring cell 2 through the X2 interface between the base stations.
  • the time-frequency resource informs the base station to which the neighboring cell 2 belongs.
  • the neighboring cell does not need to send a downlink reference signal to the UE before obtaining the notification of the base station.
  • the neighboring cell is determined by the base station to which the serving cell belongs for the UE.
  • the relative positional relationship between the cells is determined, for example, the network planner designs the network topology.
  • the network topology can also update the network topology as needed.
  • the serving cell may determine a neighboring cell according to a network topology, and the neighboring cell may be another cell in a physical location adjacent to the serving cell.
  • the base station to which the neighboring cell belongs after receiving the notification from the base station to which the serving cell belongs, receives the antenna port according to the notification, so that the neighboring cell sends the downlink reference signal to the UE on the configured time-frequency resource.
  • the downlink reference signal is a CSI-RS.
  • Step 24 The base station notifies the UE to receive the downlink reference signal by using the time-frequency resource configured by the base station.
  • the base station notifies the neighboring cell to send the downlink reference signal to the UE by using the time-frequency resource configured by the base station in a display or implicit manner.
  • the manner of displaying the notification in the embodiment includes: using a channel such as a physical broadcast channel (PBCH) of the serving cell, or a dedicated RRC signaling to notify the UE that one or more neighboring cells respectively use the Time-frequency resources.
  • PBCH physical broadcast channel
  • RRC dedicated RRC signaling
  • the implicit notification mode includes notifying the UE of time-frequency resources used by one or more neighboring cells by means of scrambling the PBCH of the serving cell.
  • the UE can learn the time-frequency resources used by one or more neighboring cells by blind detection, decoding, and the like.
  • the advantage of the implicit notification method is that it does not need to occupy additional air interface resources, which can save air interface resources.
  • the processing process of the transmitted data by the network side and the UE is complicated, and the processing of resources by the base station and the UE is more expensive.
  • the UE determines the time-frequency resource configured by the base station according to the notification of the base station to which the serving cell belongs, and receives the downlink reference signal by using the time-frequency resource configured by the base station.
  • the UE measures the received downlink reference signal, and reports the measurement result to the base station.
  • the base station to which the serving cell belongs receives the measurement result of the downlink reference signal sent by the UE to the serving cell of the UE.
  • the neighboring cell is notified to use the time-frequency resource configured by the base station to send a downlink reference signal to the UE, and notifies the UE to use the time-frequency resource configured by the base station to receive the downlink.
  • Reference signal The neighboring cell does not need to send a downlink reference signal to the UE before obtaining the foregoing notification of the base station to which the serving cell belongs.
  • the neighboring cell may transmit other data using the configured resources before receiving the above notification.
  • the network side may configure each cell to send a downlink reference signal to the UE at a specified interval, and each cell does not need to continuously occupy a fixed time-frequency resource to send a downlink reference signal. Therefore, the time-frequency resource used by the network side to send the downlink reference signal to the UE is saved, and the utilization of the air interface resource is improved.
  • the configured time-frequency resource may be reclaimed by using a specific mechanism, so that the network side can reuse the configured time-frequency resource.
  • the network side can recover the configured time-frequency resources in the following ways.
  • the base station In a first mode, notifies the neighboring cell to stop using the configured time-frequency resource to send to the UE according to the measurement result of the measurement result obtained by the UE on the downlink reference signal received by the configured time-frequency resource. Downlink reference signal.
  • the method further includes:
  • Step 25 The base station receives a measurement result that is measured by the UE on the downlink reference signal received by the configured time-frequency resource.
  • Step 26 The base station determines, according to the measurement result received in step 25, whether the resource reclaim condition is met.
  • Resource recovery conditions can be configured according to actual conditions. Including but not limited to the following:
  • Resource Retrieval Condition 1 According to the measurement result received in step 24, it is determined that cell handover is required.
  • Resource Recovery Condition 2 According to the measurement result received in step 24, it is determined that the UE stays at a fixed position. For example, if the measurement result of each cell changes by less than the set threshold within a certain period of time, the UE may be considered to be in a fixed position.
  • Resource recovery condition 3 According to the measurement result received in step 24, it is determined that the signal quality of the neighboring cell is poor, and no handover is needed. For example, if the signal quality of the neighboring cell is lower than the set threshold of the serving cell and the time when the serving cell exceeds the set threshold exceeds the set duration, the signal quality of the neighboring cell may be considered to be poor.
  • step 27 If the resource reclaim condition is met, go to step 27. If the resource reclaim condition is not met, return to step 25 and continue to wait to receive the measurement report.
  • Step 27 The base station notifies the neighboring cell to stop using the configured time-frequency resource to send a downlink reference signal to the UE.
  • the base station may notify the neighboring cell of the measurement stop instruction through the X2 interface between the base stations. After receiving the measurement stop command, the neighboring cell stops using the previously configured time-frequency resource to send the downlink reference signal to the UE.
  • step 23 of FIG. 2 when the base station notifies the neighboring cell to use the time-frequency resource configured by the base station to send the downlink reference signal to the UE, the measurement termination time is carried in the time-frequency resource information to notify the neighbor. Community.
  • the time-frequency resource information includes not only the time domain resource information and the frequency domain resource information, but also the effective time information, where the valid time information is used to indicate the time when the time-frequency resource configured by the base station is used to send the downlink reference signal. And, when the end time of the valid time period is reached, the neighboring cell stops sending the downlink reference signal to the UE by using the configured time-frequency resource.
  • the effective time information is 70 ms
  • the neighboring cell starts to send the downlink reference signal to the UE by using the configured time-frequency resource.
  • the duration of the timer is set to 70ms.
  • the configuration of the time-frequency resource is stopped to send a downlink reference signal to the UE.
  • the neighboring cells are configured to send the downlink reference signal to the UE by using the configured time-frequency resource after the scheduled time-frequency resource is used to send the downlink reference signal to the UE for a predetermined time.
  • the network side pre-configures the duration of the downlink reference signal transmitted by each base station.
  • all base stations start to send a downlink reference signal to the UE by using the configured time-frequency resource after receiving the notification of the base station to which the serving cell belongs as shown in step 23 in FIG. 2 by default.
  • set a timer when starting to send the downlink reference signal for example, the duration of the timer can be set to 50ms.
  • the configuration of the time-frequency resource is stopped to send a downlink reference signal to the UE.
  • the base station notifies the neighboring cell to use the time-frequency resource configured by the base station to send a downlink reference signal to the UE, and the embodiment of the present application further provides multiple specific notification modes.
  • the base station notifies the UE to receive the downlink reference signal by using the time-frequency resource configured by the base station, and the embodiment of the present application also provides multiple specific notification modes.
  • the specific notification manner will be described in detail below with reference to FIGS. 4 to 9.
  • the base station to which the serving cell belongs is to notify the UE of the time-frequency resource information in an explicit manner.
  • the base station to which the serving cell belongs is to notify the UE of the time-frequency resource information in an implicit manner.
  • FIG. 4 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present application.
  • Step 40 The base station sends a downlink reference signal to the UE through the serving cell.
  • the base station is a base station to which the serving cell of the UE belongs.
  • the downlink reference signal is a CSI-RS.
  • Step 41 The base station receives a measurement result of a downlink reference signal sent by the UE to the serving cell of the UE.
  • the base station refers to a base station to which the serving cell of the UE belongs, unless otherwise stated.
  • steps 40 and 41 are substantially similar to the step 21 of FIG. 2, and the description of the step 21 in FIG. 2 can be referred to the previous embodiment, and details are not described herein again.
  • Step 42 The base station determines, according to the measurement result received in step 41, whether the handover preparation condition is met.
  • the implementation of the step 42 is substantially similar to the step 22 in FIG. 2, and the description of the step 22 in FIG. 2 can be referred to the previous embodiment, and details are not described herein again. If the handover preparation condition is satisfied, steps 43 and 44 are performed. If the handover preparation condition is not met, the process returns to step 40, that is, the base station continues to send the downlink reference signal to the UE through the serving cell, and receives the measurement result obtained by the UE measuring the reference signal sent by the serving cell.
  • Step 43 The base station sends a notification message to the neighboring cell, where the notification message carries time-frequency resource information, where the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the base station configures a neighboring cell with a time-frequency resource for transmitting a downlink reference signal to the UE.
  • the time-frequency resource information for indicating the configured time-frequency resource is then carried in the notification message, and the notification message is sent to the base station to which the neighboring cell belongs by using the X2 interface between the base stations.
  • the notification message is used to notify the neighboring cell to send a downlink reference signal to the UE by using a time-frequency resource indicated by the time-frequency resource information.
  • the notification message not only carries the time-frequency resource information, but also carries the identifier of the neighboring cell, so as to establish a correspondence between the neighboring cell and the time-frequency resource information after the base station to which the neighboring cell belongs receives the notification message.
  • the port of the neighboring cell is configured, and the downlink reference signal is sent to the UE by using the time-frequency resource indicated by the time-frequency resource information.
  • the base station to which the serving cell belongs generates a notification message, and the notification message carries time-frequency resource information corresponding to the time-frequency resource allocated to the neighboring cell 1, and the identifier of the neighboring cell 1.
  • the base station to which the serving cell belongs sends the generated notification message to the base station to which the neighboring cell 1 belongs through the X2 interface.
  • the neighboring cell does not need to send a downlink reference signal to the UE before obtaining the notification message.
  • Step 44 The base station sends the indication signaling to the UE by using a physical channel other than the PBCH of the serving cell, where the indication signaling carries the time-frequency resource information.
  • the time-frequency resource information please refer to the description in the previous embodiment, and will not be repeated here.
  • the indication signaling is an RRC message.
  • the indication signaling in the form of the RRC message can be sent to the UE through the SIB.
  • the SIB For the time-frequency resources occupied by the SIB, refer to the related standard document.
  • the indication signaling in the form of RRC message can also be sent to the UE through the remaining minimum system information (RMSI), where the RMSI can pass the PBCH or the physical downlink control channel.
  • RMSI remaining minimum system information
  • PDCCH Physical Downlink Control Channel
  • indication signaling in the form of RRC message can also be sent to the UE through the remaining system information (OSI), and the OSI can use the physical downlink shared channel (English: Physical Downlink Shared Channel) , PDSCH) transmission.
  • OSI System Information
  • the indication signaling is used to notify the UE to receive the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information.
  • the UE receives the indication signaling sent by the base station on a physical channel other than the PBCH of the serving cell.
  • the UE receives the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information, and performs measurement on the received downlink reference signal, and reports the measurement result to the base station.
  • the indication signaling in the form of the RRC message not only carries the time-frequency resource information, but also carries the identifier of the neighboring cell, so that the UE measures the reference signal received on the time-frequency resource indicated by the time-frequency resource information, and obtains After the measurement result, the measurement result and the neighboring cell identifier are reported to the network side.
  • the RRC message may not carry the identifier of the neighboring cell, and the UE may report the measurement result and the time-frequency resource information to the network side, because the base station to which the serving cell belongs stores the identifier of the neighboring cell and the time-frequency resource used for indicating the configuration.
  • the correspondence between the time-frequency resource information and the base station can still confirm the correspondence between the measurement result and the identifier of the neighboring cell.
  • the network side may reclaim the configured time-frequency resource for transmitting other data.
  • the recovery of time-frequency resources can take many forms, as described in the previous embodiments. This embodiment is described only in the first mode. After step 43 and step 44, step 45 is performed.
  • Step 45 The base station receives a measurement result obtained by the UE measuring the downlink reference signal received by the configured time-frequency resource.
  • the UE should report the neighboring cell identifier or the time-frequency resource information used to indicate the time-frequency resource occupied by the downlink reference signal on which the measurement result is generated. In this way, the base station can confirm the correspondence between the measurement result and the neighboring cell.
  • Step 46 The base station determines, according to the measurement result received in step 45, whether the resource reclaim condition is met. If the resource reclaim condition is met, go to step 47. If the resource reclaim condition is not met, then return to step 45 and continue to wait to receive the measurement report.
  • the resource reclaim condition For the related content of the resource recovery condition, please refer to the description in the previous embodiment, and details are not described herein again.
  • Step 47 The base station notifies the neighboring cell to stop using the configured time-frequency resource to send a downlink reference signal to the UE.
  • Steps 46 and 47 are similar to steps 26 and 27 in the embodiment shown in FIG. 3. Reference may be made to the description of step 26 and step 27 in FIG. 3 with reference to the previous embodiment, and details are not described herein again.
  • FIG. 5 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present application.
  • the base station notifies the UE of the configured time-frequency resource information through the PBCH, that is, step 44 in FIG. 4 can also be replaced by step 54.
  • Step 50, step 51, step 52, and step 53 in FIG. 5 are similar to steps 40, 41, 42 and 43 in FIG. 4, respectively, and the description of the steps in FIG. 4 can be referred to the previous embodiment. , will not repeat them here.
  • Step 54 The base station notifies the UE of the time-frequency resource information by using a PBCH of the serving cell.
  • a description of the time-frequency resource information please refer to the description in the previous embodiment, and will not be repeated here.
  • the indication signaling is an RRC message.
  • the indication signaling in the form of an RRC message may be sent to the UE through the MIB.
  • the MIB can be transmitted over the PBCH.
  • the indication signaling is used to notify the UE to receive the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information.
  • the time-frequency resource information sent by the base station is received in the PBCH of the serving cell.
  • the UE receives the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information, and performs measurement on the received downlink reference signal, and reports the measurement result to the base station.
  • the indication signaling in the form of the RRC message not only carries the time-frequency resource information, but also carries the identifier of the neighboring cell, so that the UE measures the reference signal received on the time-frequency resource indicated by the time-frequency resource information, and obtains After the measurement result, the measurement result and the neighboring cell identifier are reported to the network side.
  • the RRC message may not carry the identifier of the neighboring cell, and the UE may report the measurement result and the time-frequency resource information to the network side, because the base station to which the serving cell belongs stores the identifier of the neighboring cell and the time-frequency resource used for indicating the configuration.
  • the correspondence between the time-frequency resource information and the base station can still confirm the correspondence between the measurement result and the identifier of the neighboring cell.
  • FIG. 6 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present application.
  • the base station divides the time-frequency resource information into at least two parts, and notifies the UE of the partial time-frequency resource information through the PBCH, and notifies the UE of the remaining time-frequency resource information through other physical channels. That is, step 44 in FIG. 4 can also be replaced by step 641, step 642 and step 643.
  • Step 60, step 61, step 62, and step 63 in FIG. 5 are similar to step 40, step 41, step 42, step 43 in FIG. 4, respectively, and the description of the steps in FIG. 4 can be referred to the previous embodiment. , will not repeat them here.
  • Step 641 The base station divides time-frequency resource information used to indicate the configured time-frequency resource into two parts, for example, the first part information and the second part information.
  • Step 642 The base station notifies the UE of the partial information in the time-frequency resource information by using the PBCH of the serving cell.
  • Step 643 The base station sends the indication signaling to the UE, where the indication signaling carries the remaining information except the partial information in the time-frequency resource information.
  • the base station carries part of the information (such as the first part of the information) in the time-frequency resource information in the first indication signaling in the form of the RRC message, and sends the first indication signaling to the UE through the MIB.
  • the MIB can be transmitted over the PBCH.
  • the base station sends the second indication signaling to the UE, where the second indication signaling carries the remaining information (such as the second part information) of the time-frequency resource information except the partial information.
  • the second indication signaling may be sent to the UE through the SIB, the RMSI or the OSI, and the second indication signaling carrying the second partial information is transmitted through the PDCCH. I will not repeat them here.
  • the UE receives part of the information in the time-frequency resource information sent by the base station in the PBCH of the serving cell.
  • the UE receives the indication signaling sent by the base station on a physical channel other than the PBCH of the serving cell, where the indication signaling carries the time-frequency resource information except the part information. The rest of the information.
  • the UE performs a combining process on the partial information in the time-frequency resource information and the remaining information except the partial information in the time-frequency resource information, and determines that the merge processing result is the time-frequency resource information.
  • the UE receives the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information, and performs measurement on the received downlink reference signal, and reports the measurement result to the base station.
  • the base station to which the serving cell belongs is to notify the UE of the time-frequency resource information in an explicit manner.
  • a scheme in which several base stations to which a serving cell belongs to notify the UE of time-frequency resource information in an implicit manner will be described below with reference to FIG. 7 and FIG.
  • FIG. 7 is a flowchart of another method for transmitting a reference signal according to an embodiment of the present application.
  • the base station scrambles the PBCH according to the time-frequency resource information, thereby notifying the UE of the time-frequency resource information. That is, step 44 in FIG. 4 can also be replaced by step 741, step 742 and step 743.
  • Step 70, step 71, step 72, and step 73 in FIG. 7 are similar to step 40, step 41, step 42, step 43 in FIG. 4, respectively, and the description of the steps in FIG. 4 can be referred to the previous embodiment. , will not repeat them here.
  • Step 741 The base station encodes time-frequency resource information used to indicate the configured time-frequency resource, and obtains a coding result.
  • time-frequency resource information encoding format is given below, which specifically defines the meaning of each bit in the encoding, and is used for illustrative purposes only, and does not impose restrictions on a specific encoding format.
  • Example 1 The time-frequency resource information is indicated by 10 bits: 1010 0100 01.
  • the 2 bits of the lower bit (starting from the right) indicate the number of neighboring cells, which is 01 in this example, indicating that only the time-frequency resource information of one neighboring cell is carried.
  • the 0100 of the 3rd to 6th bits indicates that the neighboring cell 1 is configured to transmit the downlink reference signal in the time domain, and the 7th to 10th bits indicate that the neighboring cell 1 is configured to transmit the downlink reference signal in the frequency domain. position.
  • Example 2 Indicated by 18-bit time-frequency resource information: 1010 0100 1011 1100 10.
  • the lower 2 bits indicate the number of neighboring cells, which is 10 in this example, indicating that the time-frequency resource information of two neighboring cells is carried.
  • the 3 to 6 bits indicate that the neighboring cell 1 is configured to transmit the downlink reference signal in the time domain
  • the 7 to 10 bits indicate that the neighboring cell 2 is configured to transmit the downlink reference signal in the time domain
  • 11 to The 14bit indication indicates that the neighboring cell 1 is configured to transmit the downlink reference signal in the frequency domain
  • the 15 to 18bit indicates that the neighboring cell 2 is configured to transmit the downlink reference signal in the frequency domain.
  • Step 742 The base station inputs the coding result into a shift register to obtain a pseudo random sequence.
  • Step 743 The base station scrambles the PBCH of the serving cell by using the pseudo random sequence.
  • a blind check is performed on the PBCH of the serving cell to determine whether the PBCH is scrambled. If the PBCH is scrambled, the scrambled PBCH is descrambled to determine that the descrambling result is a pseudo-random sequence. Decoding the pseudo random sequence to determine a decoding result as the time-frequency resource information.
  • the UE receives the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information, and performs measurement on the received downlink reference signal, and reports the measurement result to the base station.
  • FIG. 8 is a flowchart of another method for transmitting a reference signal according to an embodiment of the present application.
  • the base station to which the serving cell belongs informs the UE of the time-frequency resource information by combining the explicit and the implicit, that is, a part of the time-frequency resource information is sent to the UE through the PBCH, and the PBCH is scrambled by using the remaining time-frequency resource information. That is, step 44 in FIG. 4 can also be replaced by step 841, step 842 and step 843.
  • Step 80, step 81, step 82, and step 83 in FIG. 8 are similar to step 40, step 41, step 42, step 43 in FIG. 4, respectively, and the description of the steps in FIG. 4 can be referred to the previous embodiment. , will not repeat them here. This embodiment focuses on steps 841, 842, and 843.
  • Step 841 The base station encodes time-frequency resource information used to indicate the configured time-frequency resource, and obtains a coding result.
  • Step 842 The base station inputs part of the information in the coding result into a shift register to obtain a pseudo random sequence.
  • the base station divides the coding result into two parts, such as first part information and second part information.
  • the base station inputs the first part of information into the shift register to obtain a pseudo-random sequence.
  • Step 843 the base station notifies the UE of the coding result by using the PBCH of the serving cell, and the remaining information except the partial information, and scrambling the PBCH by using the pseudo random sequence.
  • the base station transmits the indication signaling carrying the second partial information to the UE through the PBCH of the serving cell, and scrambles the PBCH using a pseudo random sequence.
  • a blind check is performed on the PBCH of the serving cell to determine whether the PBCH is scrambled. If the PBCH is scrambled, the UE descrambles the scrambled PBCH to determine that the descrambling result is a pseudo-random sequence. The UE decodes the pseudo random sequence, and determines that the decoding result is part of the information in the time-frequency resource information. The UE further performs the decoding of the descrambled PBCH, and obtains the indication signaling sent in the PBCH, where the indication signaling carries the remaining information except the partial information in the time-frequency resource information.
  • the UE performs a combining process on the partial information in the time-frequency resource information and the remaining information except the partial information in the time-frequency resource information, and determines that the merge processing result is the time-frequency resource information.
  • the UE receives the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information, and performs measurement on the received downlink reference signal, and reports the measurement result to the base station.
  • FIG. 9 is a flowchart of another method for transmitting a reference signal according to an embodiment of the present application.
  • the network side device and the UE which are exemplified by the base station, store the same index table in advance, and store the time-frequency resource information index and the time-frequency resource in the index table. Correspondence of information.
  • the time-frequency resource index may be used instead of the time-frequency resource information in the foregoing embodiments.
  • FIG. 9 focuses on the method of transmitting the reference signal from the perspective of the base station to which the serving cell belongs. Without explanation, the base station refers to the base station to which the serving cell belongs.
  • Step 90 The base station sends a downlink reference signal to the UE through the serving cell.
  • the base station is a base station to which the serving cell of the UE belongs.
  • the downlink reference signal is a CSI-RS.
  • Step 91 The base station receives a measurement result of a downlink reference signal sent by the UE to the serving cell of the UE.
  • steps 90 and 91 are substantially similar to the step 21 of FIG. 2, and the description of the step 21 in FIG. 2 can be referred to the previous embodiment, and details are not described herein again.
  • Step 92 The base station determines, according to the measurement result received in step 91, whether the handover preparation condition is met.
  • the implementation of the step 92 is substantially similar to the step 22 in FIG. 2, and the description of the step 22 in FIG. 2 can be referred to the previous embodiment, and details are not described herein again. If the handover preparation condition is satisfied, step 93 and step 94 are performed. If the handover preparation condition is not met, the process returns to step 90, that is, the base station continues to send the downlink reference signal to the UE through the serving cell, and receives the measurement result obtained by the UE measuring the reference signal sent by the serving cell.
  • Step 93 The base station sends a notification message to the neighboring cell, where the notification message carries an index of time-frequency resource information.
  • the time-frequency resource information index is used to search for time-frequency resource information corresponding to the time-frequency resource information index from the pre-stored index table, where the time-frequency resource information is used to indicate the configured time-frequency resource.
  • Table 1 is an example of an index table provided by an embodiment of the present application.
  • Time-frequency resource information index Time-frequency resource information Port number
  • the k1, k2, k3 or k4 in Table 1 is used to indicate the position of the RE in the frequency domain, and l1, l2, l3 or l4 is used to indicate the position of the RE in the time domain.
  • the base station configures a neighboring cell with a time-frequency resource for transmitting a downlink reference signal to the UE.
  • the base station searches the index table shown in Table 1 for the time-frequency resource information index corresponding to the time-frequency resource information of the configured time-frequency resource, and then carries the found time-frequency resource information index in the notification message, and the base station
  • the X2 interface sends a notification message to the base station to which the neighboring cell belongs.
  • the notification message is used to notify the neighboring cell to send a downlink reference signal to the UE by using a time-frequency resource indicated by the time-frequency resource information.
  • the notification message carries not only time-frequency resource information but also an identifier of the neighboring cell. Please refer to the detailed description of step 43 in FIG.
  • the time-frequency resource information of the time-frequency resource allocated by the base station to which the serving cell belongs to the neighboring cell 1 is (k1, l1), and the corresponding time-frequency resource information index in the index table is 1.
  • the base station generates a notification message, where the notification message carries the time-frequency resource information index 1, and the identifier of the neighboring cell 1.
  • the base station to which the serving cell belongs sends the generated notification message to the base station to which the neighboring cell 1 belongs through the X2 interface.
  • the neighboring cell 1 After receiving the notification message, the neighboring cell 1 searches for the corresponding time-frequency resource information from the index table according to the time-frequency resource information index 1 as (k1, l1), when the time-frequency resource information (k1, l1) indicates The downlink reference signal is sent to the UE on the frequency resource. The neighboring cell 1 does not need to send a downlink reference signal to the UE before obtaining the notification message.
  • the time-frequency resource information index occupies less data.
  • the 2-bit time-frequency resource information index can distinguish four different time-frequency resource information.
  • Step 94 The base station sends the indication signaling to the UE, where the indication signaling carries the time-frequency resource information index.
  • the indication signaling carries the time-frequency resource information index.
  • the indication signaling is an RRC message.
  • the indication signaling in the form of the RRC message can be sent to the UE through the SIB or the MIB.
  • the indication signaling in the form of RRC message can also be sent to the UE through the MIB or the RMSI, where the MIB can be transmitted through the PBCH, and the RMSI can be transmitted through the PBCH or the PDCCH; the indication signaling in the form of the RRC message is also
  • the OSI may be transmitted to the UE through the remaining system information, and the OSI may be transmitted through the PDSCH.
  • the UE receives the indication instruction sent by the base station, where the indication signaling carries the time-frequency resource information index.
  • the UE searches for the time-frequency resource information corresponding to the time-frequency resource information index from the stored index table, where the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the UE receives the downlink reference signal by using the time-frequency resource indicated by the time-frequency resource information, and performs measurement on the received downlink reference signal, and reports the measurement result to the base station.
  • the indication signaling carries not only time-frequency resource information but also an identifier of the neighboring cell. Please refer to the detailed description of step 44 in FIG.
  • the base station UE pre-stores an index table, and when the base station to which the serving cell belongs is notified to the neighboring cell or the UE, the time-frequency resource can be carried in the notification message or the command information.
  • Frequency resource information index Since the data amount of the time-frequency resource information index is much smaller than the time-frequency resource information, the transmission resources between the base stations can be saved compared with the display notification manner, and the air interface resources between the base station and the UE can be saved, thereby further improving resource utilization. rate.
  • the embodiment of the present application further provides a network device.
  • the network device is a base station.
  • the structure and function of the network device will be described below by taking a base station as an example in conjunction with FIG.
  • FIG. 10 is a schematic structural diagram of a base station, which serves as a base station to which a serving cell of a UE in FIG. 1 to FIG. 9 belongs, and implements a serving cell of a UE in each embodiment shown in FIG. 1 to FIG. The function of the base station.
  • the base station includes a transceiver 101 and a processor 102.
  • the transceiver 101 may be referred to as a remote radio unit (RRU), a transceiver unit, a transceiver, or a transceiver circuit or the like.
  • the transceiver 101 can include at least one antenna 1011 and a radio frequency unit 1012.
  • the transceiver 101 can be used for transceiving radio frequency signals and converting radio frequency signals with baseband signals.
  • the base station includes one or more baseband units (abbreviation: BBUs) 103.
  • the baseband unit includes a processor 102.
  • the baseband unit 103 is mainly used for baseband processing such as channel coding, multiplexing, modulation, spread spectrum, etc., and control of the base station.
  • the transceiver 101 and the baseband unit 103 may be physically disposed together or physically separated, that is, distributed base stations.
  • the baseband unit 103 may be composed of one or more single boards, and multiple boards may jointly support a single access system radio access network, or may separately support different access systems.
  • the baseband unit 103 includes a processor 101.
  • the processor 102 can be used to control the network device to perform corresponding operations in the foregoing method embodiments.
  • baseband unit 103 may also include a memory 104 for storing the necessary instructions and data.
  • the transceiver 101 is configured to send a downlink reference signal of the serving cell to the UE, and receive a measurement result of the downlink reference signal sent by the UE to the serving cell.
  • the processor 102 is configured to determine, according to the measurement result, whether a predetermined handover preparation condition is met.
  • the transceiver 101 is further configured to: when a predetermined handover preparation condition is met, notify a neighboring cell to send a downlink reference signal to the UE by using the configured time-frequency resource, where the neighboring cell does not need to go to the location before being notified. Transmitting, by the UE, a downlink reference signal; and informing the UE to receive a downlink reference signal by using a time-frequency resource configured by the base station.
  • the transceiver 101 notifies the neighboring cell to send the downlink reference signal to the UE by using the configured time-frequency resource, and the UE is notified to use the time-frequency resource configured by the base station to receive the downlink reference signal.
  • An embodiment of the present application provides a network device that is a base station, where the network device is a base station to which a serving cell of the UE belongs.
  • the base station receives a measurement result of a downlink reference signal sent by the UE to the serving cell of the UE.
  • the neighboring cell is notified to use the time-frequency resource configured by the base station to send a downlink reference signal to the UE, and notifies the UE to receive the downlink reference signal by using the time-frequency resource configured by the base station.
  • the neighboring cell does not need to send a downlink reference signal to the UE before obtaining the foregoing notification by the base station to which the serving cell belongs, and may use the configured resource to transmit other data. Therefore, the time-frequency resource used by the network side to send the downlink reference signal to the UE is saved, and the utilization of the air interface resource is improved.
  • the network side may reclaim the configured time-frequency resource by using a specific mechanism, so that the network side can re-use the configured time.
  • the frequency resource sends service data to the UE, thereby improving resource utilization.
  • the transceiver 101 is further configured to receive, by the UE, a measurement result obtained by measuring, by the UE, a downlink reference signal received by the configured time-frequency resource; and receiving, by the UE, a downlink received by the configured time-frequency resource. And measuring, by the reference signal, the neighboring cell to stop using the configured time-frequency resource to send a downlink reference signal to the UE.
  • the processor 102 determines, according to the measurement result obtained by the UE received by the transceiver 101 on the downlink reference signal received by the configured time-frequency resource, whether the resource reclaim condition is met. If the resource reclaim condition is met, the transceiver 101 notifies the neighboring cell to stop using the configured time-frequency resource to send a downlink reference signal to the UE.
  • the embodiment of the present application further provides a network device.
  • the network device is a base station.
  • the structure and function of the network device will be described below by taking a base station as an example with reference to FIG. 11 is a schematic structural diagram of a base station, which serves as a base station to which a serving cell of a UE in FIG. 1 to FIG. 9 belongs, and has a serving cell in an embodiment of the embodiment shown in FIG. 1 to FIG.
  • the base station includes a transceiver unit 111 and a processing unit 112.
  • the transceiver unit 111 and the processing unit 112 may be implemented in software or in hardware.
  • the transceiver unit 111 can be the transceiver 101 of FIG. 10, which can be the processor 102 of FIG.
  • FIG. 12 is a schematic structural diagram of a UE, which functions as a UE in FIG. 1 to FIG. 9 to implement the functions of the UE shown in one embodiment of FIGS. 1 to 9.
  • the base station includes a processor 121 and a transceiver 122.
  • the transceiver 122 can include a control circuit and an antenna, wherein the control circuit can be used for converting baseband signals and radio frequency signals and processing the radio frequency signals, and the antenna can be used to transmit and receive radio frequency signals.
  • the device may also include other major components of the terminal device, such as memory, input and output devices, and the like.
  • the processor 121 can be used to process the communication protocol and the communication data, and to control the entire terminal device, execute the software program, and process the data of the software program, for example, to support the terminal device to perform the corresponding operations in the foregoing method embodiments.
  • the memory 123 is mainly used to store software programs and data. After the terminal device is powered on, the processor 121 can read the software program in the memory, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 121 is configured to determine, according to a notification by the base station, a time-frequency resource configured by the base station, where the base station is a base station to which the serving cell of the UE belongs.
  • the transceiver 122 is configured to receive a downlink reference signal by using a time-frequency resource configured by the base station.
  • the UE receives the downlink reference signal sent by the neighboring cell on the configured time-frequency resource according to the notification of the base station to which the serving cell belongs.
  • the time-frequency resource used by the network side to transmit the downlink reference signal to the UE can be saved, and the utilization of the air interface resource is improved.
  • the UE can receive the downlink reference signal by using the time-frequency resource configured by the base station according to the notification of the base station to which the serving cell belongs, thereby improving the pertinence of receiving the downlink reference signal, and contributing to saving the energy consumption of the UE.
  • the processor 121 determines the specific mode and implementation details of the time-frequency resource configured by the base station according to the notification of the base station received by the transceiver 122, refer to the description in the foregoing method embodiment, especially FIG. The related description to FIG. 9 will be briefly described herein.
  • the transceiver 122 is configured to receive the indication signaling sent by the base station on a physical channel other than the PBCH of the serving cell, where the indication signaling carries the time-frequency resource Information, the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the processor 121 is configured to determine, according to the time-frequency resource information, a time-frequency resource configured by the base station.
  • the transceiver 122 is configured to receive time-frequency resource information sent by the base station in a PBCH of the serving cell, where the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the processor 121 is configured to determine, according to the time-frequency resource information, a time-frequency resource configured by the base station.
  • the transceiver 122 is configured to receive, in a PBCH of the serving cell, part of information in time-frequency resource information sent by the base station; and in other physical fields except the PBCH of the serving cell. On the channel, the indication signaling sent by the base station is received, where the indication signaling carries the remaining information except the partial information in the time-frequency resource information.
  • the processor 121 is configured to perform a combining process on the partial information in the time-frequency resource information and the remaining information except the partial information in the time-frequency resource information, and determine that the merge processing result is the time-frequency resource information.
  • the time-frequency resource information is used to indicate the configured time-frequency resource; and the time-frequency resource configured by the base station is determined according to the time-frequency resource information.
  • the transceiver 122 is configured to perform a blind check on the PBCH of the serving cell to determine whether the PBCH is scrambled.
  • the processor 121 is configured to descramble the scrambled PBCH if the PBCH is scrambled, determine that the descrambling result is a pseudo-random sequence, and decode the pseudo-random sequence to determine a decoding result.
  • the time-frequency resource information is used to indicate the configured time-frequency resource; and the time-frequency resource configured by the base station is determined according to the time-frequency resource information.
  • the transceiver 122 is configured to perform a blind check on the PBCH of the serving cell to determine whether the PBCH is scrambled.
  • the processor 121 is configured to descramble the scrambled PBCH if the PBCH is scrambled, determine that the descrambling result is a pseudo-random sequence, and decode the pseudo-random sequence to determine a decoding result. Part of the information in the time-frequency resource information.
  • the transceiver 122 is further configured to obtain the indication signaling sent by the descrambled PBCH, where the indication signaling carries the remaining information except the partial information in the time-frequency resource information.
  • the processor 121 is further configured to perform a combining process on the partial information in the time-frequency resource information and the remaining information except the partial information in the time-frequency resource information, to determine that the merge processing result is the time Frequency resource information, the time-frequency resource information is used to indicate the configured time-frequency resource; and the time-frequency resource configured by the base station is determined according to the time-frequency resource information.
  • the transceiver 122 is configured to receive an indication instruction sent by the base station, where the indication signaling carries the time-frequency resource information index.
  • the processor 121 is configured to search for the time-frequency resource information corresponding to the time-frequency resource information index from the stored index table, where the time-frequency resource information is used to indicate the configured time-frequency resource.
  • the processor 121 is further configured to perform measurement on the downlink reference signal received on the configured time-frequency resource, and report the measurement result to the base station.
  • FIG. 13 is a schematic structural diagram of a UE, which functions as a UE in FIG. 1 to FIG. 9 to implement the functions of the UE shown in one embodiment of FIGS. 1 to 9.
  • the base station processing unit 131 and the transceiver unit 132 may be implemented in software or in hardware.
  • the processing unit 131 may be the processor 121 of FIG. 12, which may be the transceiver 112 of FIG.
  • the embodiment of the present invention further provides a communication system, including the base station and the UE to which the serving cell of the UE in the foregoing embodiment belongs.
  • a communication system including the base station and the UE to which the serving cell of the UE in the foregoing embodiment belongs.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

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Abstract

本申请公开了一种参考信号的发送方法、基站以及用户设备。用以缓解现有技术中时频资源利用率不高的问题。该方法包括：基站接收UE发送的对所述UE的服务小区的下行参考信号的测量结果，所述基站是所述服务小区所属的基站；所述基站根据所述测量结果确定是否满足预定切换准备条件；如果满足预定切换准备条件，所述基站通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，所述相邻小区在被通知之前无需向所述UE发送下行参考信号，以及所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号。

Description

参考信号的发送方法、基站以及用户设备 技术领域
本申请涉及计算机及通信技术领域，尤其涉及一种参考信号的发送方法、基站、用户设备(英文：User Equipment，UE)及一种网络系统。
背景技术
为各种网络服务的应用提供保证。移动性管理的一个典型场景是，当处于无线资源控制连接(英文：Radio Resource Control_CONNECTED,RRC_CONNECTED)状态的UE在小区之间移动时，需要及时进行小区切换以免丢失连接。基于参考信号的测量是小区切换过程中的一个基本动作。UE在当前位置测量各小区发送的参考信号的参考信号接收功率(英文：Reference Signal Receiving Power,RSRP)，并向基站发送测量结果。基站根据接收到的测量结果以及保存的切换管理算法确定是否对UE进行小区切换。
在长期演进(英文：Long Term Evolution，LTE)网络中，承载上述功能的参考信号是小区特定参考信号(英文：Cell Specific Reference Signal，CRS)。在LTE网络中，CRS是持续发送并占用固定的时频资源。基站和UE之间的空口资源是相对紧张的，现有CRS的发送方式对空口资源的消耗较高。
发明内容
的问题。
第一方面，提供了一种参考信号的发送方法，包括：
基站接收UE发送的对所述UE的服务小区的下行参考信号的测量结果，所述基站是所述服务小区所属的基站；
所述基站根据所述测量结果确定是否满足预定切换准备条件；
如果满足预定切换准备条件，所述基站通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，所述相邻小区在被通知之前无需向所述UE发送下行参考信号，以及
所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号。
根据本申请实施例提供的参考信号的发送方法，相邻小区在获得服务小区所属的基站的上述通知之前，无需向UE发送下行参考信号。相邻小区在接收到上述通知之前，可以使用上述配置的资源传输其他数据。通过上述方法，各小区无需持续占用固定的时频资源发送下行参考信号。从而节约了网络侧向UE发送下行参考信号占用的时频资源，提高了空口资源利用率。
在一种可能的实现方式中，所述通知一个相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，包括：
所述基站向所述相邻小区发送通知消息，所述通知消息中携带所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
服务小区所属的基站通过基站之间的X2接口，将用于配置的时频资源的时频资源信息通知相邻小区所属的基站，以便于相邻小区使用配置的时频资源向UE发送下行参考信号。时频资源信息中包括用于指示RE的时域资源信息和频域资源信息，频域资源信息用于指示用来发送下行参考信号的RE在频域中所属的子载波、时域资源信息用于指示用来发送下行参考信号的RE在时域上所属的symbol。
基站以显示或隐式的方式通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号。显示通知方式包括通过服务小区的物理广播信道等信道、或者专用的RRC信令告知UE一个或多个相邻小区分别使用的时频资源。显示通知方式的优点在于网络侧和UE的通过简单的处理，即可快速得知通知的时频资源，对基站和UE的处理资源的耗费较少。
隐式通知方式包括通过对服务小区的PBCH加扰的方式将一个或多个相邻小区分别使用的时频资源告知UE。隐式通知方式的优点是无需占用额外的空口资源，能够节约空口资源。
在一种可能的实现方式中，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
所述基站使用除所述服务小区的物理广播信道之外的其他物理信道向所述UE发送指示信令，所述指示信令中携带所述时频资源信息。
在一种可能的实现方式中，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
所述基站通过所述服务小区的物理广播信道通知所述UE所述时频资源信息。
在一种可能的实现方式中，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
所述基站通过所述服务小区的物理广播信道通知所述UE所述时频资源信息中的部分信息；
所述基站使用除所述物理广播信道之外的其他物理信道向所述UE发送指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。
在一种可能的实现方式中，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
所述基站对所述时频资源信息进行编码，获得编码结果；
将所述编码结果输入移位寄存器，获得伪随机序列；
使用所述伪随机序列对所述服务小区的物理广播信道进行加扰。
在一种可能的实现方式中，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
所述基站对所述时频资源信息进行编码，获得编码结果；
所述基站将所述编码结果中的部分信息输入移位寄存器，获得伪随机序列；
所述基站通过所述服务小区的物理广播信道通知所述UE所述编码结果除所述部分信息之外的其余信息，且使用所述伪随机序列对所述物理广播信道进行加扰。
本申请实施例还提供了另一种通知方式，以基站为例的网络侧设备和UE均预先存储相同的索引表，该索引表中保存时频资源信息索引与时频资源信息的对应关系。服务小区所属的基站在向相邻小区或UE通知配置的时频资源时，可以用时频资源索引替代时频资源信息。由于时频资源信息索引的数据量远小于时频资源信息，因此可以节省基站之间的传输资源，也可以节省基站与UE之间的空口资源，进一步提高了资源利用率。
在一种可能的实现方式中，所述通知一个相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，包括：
所述基站向所述相邻小区发送通知消息，所述通知消息中携带时频资源信息索引，所述时频资源信息索引用于从预先存储的索引表中查找到与频资源信息索引对应的时频资源信息，所述时频资源信息用以指示所述配置的时频资源。
相应地，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
所述基站向所述UE发送指示信令，所述指示信令中携带所述时频资源信息索引。
为了进一步提高时频资源利用率，在相邻小区使用基站配置的时频资源向所述UE发送下行参考信号一段时间后，可以采用特定机制收回配置的时频资源，这样网络侧可以重新使用上述配置的时频资源向UE发送业务数据。
一种收回方式具体为，在一种可能的实现方式中，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号之后，还包括：
所述基站接收所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果；
所述基站根据所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果，通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
另一种收回方式具体为，在一种可能的实现方式中，所述时频资源信息包括时域资源信息、频域资源信息和有效时间信息，所述有效时间信息用于指示所述基站配置的时频资源被用于发送下行参考信号的时间段，当到达所述有效时间段的终止时间时，所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
第二方面，还提供了一种参考信号的接收方法，包括：
用户设备UE根据基站的通知，确定所述基站配置的时频资源，所述基站为所述UE的服务小区所属的基站；以及
使用所述基站配置的时频资源接收下行参考信号。
本申请实施例提供的UE能够根据服务小区所属基站的通知，使用所述基站配置的时频资源接收下行参考信号，提高了接收下行参考信号的针对性，有助于节约UE的能量消耗。
在一种可能的实现方式中，所述UE根据基站的通知，确定所述基站配置的时频资源，包括：
所述UE在除所述服务小区的物理广播信道之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
在一种可能的实现方式中，UE根据基站的通知，确定所述基站配置的时频资源，包括：
所述UE在所述服务小区的物理物理广播信道中接收所述基站发送的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
在一种可能的实现方式中，UE根据基站的通知，确定所述基站配置的时频资源，包括：
所述UE在所述服务小区的物理广播信道中接收所述基站发送的时频资源信息中的部分信息；
所述UE在除所述服务小区的物理广播信道之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息；
所述UE对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
在一种可能的实现方式中，UE根据基站的通知，确定所述基站配置的时频资源，包括：
对所述服务小区的物理物理广播信道进行盲检以确定所述物理物理广播信道是否被加扰；
如果所述物理物理广播信道被加扰，对所述被加扰的物理物理广播信道进行解扰，确定解扰结果为伪随机序列；
对所述伪随机序列进行解码，确定解码结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
在一种可能的实现方式中，UE根据基站的通知，确定所述基站配置的时频资源，包括：
对所述服务小区的物理物理广播信道进行盲检以确定所述物理物理广播信道是否被加扰；
如果所述物理物理广播信道被加扰，对所述被加扰的物理物理广播信道进行解扰，确定解扰结果为伪随机序列；
对所述伪随机序列进行解码，确定解码结果为所述时频资源信息中的部分信息；
获取解扰后的所述物理物理广播信道中发送的的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息；
所述UE对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
在一种可能的实现方式中，UE根据基站的通知，确定所述基站配置的时频资源，包括：
接收所述基站发送的指示指令，所述指示信令中携带所述时频资源信息索引；
从存储的索引表中，查找与所述时频资源信息索引对应的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
在一种可能的实现方式中，还包括：
所述UE对在所述配置的时频资源上接收到的下行参考信号进行测量，将测量结果上报给所述基站。以便于服务小区所属的基站根据UE上报的对在所述配置的时频资源上接收到的下行参考信号进行测量得到的测量结果，确认是否收回此前配置的时频资源，从而进一步提升资源利用率。
第三方面，提供了一种基站，该基站是UE的服务小区所属的基站，该装置具有实现上述第一方面所述方法或上述第一方面的任意一种可能的实现方式的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第四方面，提供了一种UE，该UE具有实现上述第二方面所述方法或上述第二方面的任意一种可能的实现方式的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第五方面，本申请实施例提供了一种计算机存储介质，用于储存为上述报文转发设备所用的计算机软件指令，其包含用于执行上述第一方面或上述第一方面的任意一种可能的实现方式所设计的程序。
第六方面，本申请实施例提供了一种计算机存储介质，用于储存为上述报文转发设备所用的计算机软件指令，其包含用于执行上述第二方面或上述第二方面的任意一种可能的实现方式所设计的程序。
第七方面，本申请实施例提供了一种参考信号的发送系统，该系统包括第三方面所述的基站、以及第四方面所述的UE。
附图说明
图1A为本发明实施例提供的一种在文件夹添加应用图标的方法流程图；
为了更清楚地说明本申请实施例技术方案，下面将对实施例描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的参考信号的发送方法所应用的场景的示意图；
图2为本申请实施例提供的参考信号的发送方法的流程图；
图3为本申请实施例提供的另一种参考信号的发送方法的流程图；
图4为本申请另一实施例提供的一种参考信号的发送方法的流程图；
图5为本申请另一实施例提供的一种参考信号的发送方法的流程图；
图6为本申请另一实施例提供的一种参考信号的发送方法的流程图；
图7为本申请另一实施例提供的一种参考信号的发送方法的流程图；
图8为本申请另一实施例提供的一种参考信号的发送方法的流程图；
图9为本申请另一实施例提供的一种参考信号的发送方法的流程图；
图10为本申请实施例提供的一种基站的结构示意图；
图11为本申请另一实施例提供的一种基站的结构示意图；
图12为本申请实施例提供的一种UE的结构示意图；
图13为本申请另一实施例提供的一种UE的结构示意图。
具体实施方式
针对现有CRS发送方式对空口资源消耗较高的问题，本申请实施例提供了一种参考信号的发送方案。在该方案中，网络侧设备无需使用固定时频资源持续地发送下行参考信号，而是按照需求，在部分时间段中使用可配置的时频资源发送下行参考信号。示例性地，以基站为例的网络侧设备根据实际情况，确认需要发送下行参考信号时才为小区配置用以发送下行参考信号的时频资源，并指示至少一个小区根据配置信息在较短时间内发送下行参考信号。在无需发送下行参考信号时，用以发送下行参考信号的时频资源可以用来发送其他数据，从而节约了发送下行参考信号占用的时频资源，提高了空口资源的利用率。
附图1是本申请实施例应用场景的示意图。为了简明起见，仅以基站1、基站2和UE进行示例性描述。其中基站1是UE的当前服务小区所属的基站，基站2是UE的相邻小区所属的基站。虽然存在着UE的当前服务小区和相邻小区可以属于同一基站的情况，本申请实施例主要关注于UE的当前服务小区和相邻小区属于不同基站的场景。基站1和基站2之间通过X2接口交互信令。在本申请实施例中，服务小区是指为UE提供上下行数据传输的小区。
可选地，附图1中的UE处于RRC_CONNECTED状态、无线资源控制空闲(英文：Radio Resource Control_IDLE,RRC_IDLE)状态或者无线资源控制非激活(英文：Radio Resource Control_Inactive，RRC_Inactive)状态。其中RRC_CONNECTED状态和RRC_IDLE状态可以参考LTE标准中的描述。RRC_Inactive状态是尚在新电波(英文：New Radio,NR)标准讨论中的一种状态。处于RRC_Inactive状态的UE具有以下特点：网络侧保留处于RRC_INACTIVE的UE的上下文(context)信息。基站和核心网保留处于RRC_INACTIVE的UE的连接信息。网络侧可以获知处于RRC_INACTIVE状态的UE在RNA层的位置，即网络层可以知晓UE在哪个RNA中。当处于RRC_INACTIVE的UE移出之前所处的RNA时，网络侧可以感知。基站1可以通过广播信道、 专用信令等方式向UE发送信息。
附图2是本申请实施例提供的参考信号的发送方法的流程图。下面将主要从UE的当前服务小区所属基站，即附图1中的基站1的角度，对参考信号的发送方法进行描述。在没有特别说明的情况下，以下实施例中的基站是指UE的当前服务小区所属基站。
步骤21，基站接收UE发送的对所述UE的服务小区的下行参考信号的测量结果，所述基站是UE的服务小区所属的基站。
下行参考信号是预先定义好的，并占用时频资源网格中的某些特定资源粒子(英文：Resource Element,RE)。RE是LTE网络中最小的时频资源单位。基站的每个天线端口分别对应不同的时频资源网格，并对应一个参考信号，其中时频资源网格以二维网格的方式描述一个或多个RE在时域和频域中的位置。不同端口对应的时频资源是不同的。时频资源可以通过时频资源信息来指示，时频资源信息中包括用于指示RE的时域资源信息和频域资源信息，频域资源信息用于指示用来发送下行参考信号的RE在频域中所属的子载波、时域资源信息用于指示用来发送下行参考信号的RE在时域上所属的symbol的信息。通过时域资源信息和频域资源信息可以确定用来发送下行参考信号的RE在时域频域上的位置。
可选地，时频资源信息中还包括波束(beam)指示信息，beam指示信息用以指示UE接收参考信号时所使用的波束。以便于UE在指定方向的波束上接收下行参考信号、相邻小区在对应的波束上发送下行参考信号。UE采用波束成形技术接收参考信号，以在特定的方向获得增益效果。
对于下行，一个小区支持的天线端口集合依赖于该小区的参考信号配置。
可选地，下行参考信号包括以下几种类型：小区特定的参考信号(英文：Cell-specific reference signal,CRS)、UE特定的参考信号(英文：UE-specific reference signal)、定位参考信号(英文：Positioning reference signal)和信道状态信息参考信号(英文：Channel State Information-Reference Signals，CSI-RS)。CSI-RS的目的在于支持多天线端口的信道质量反馈。CSI-RS参考信号序列由一系列的参考符号组成，每个参考符号占一个RE。
可选地，在本申请实施例中服务小区的下行参考信号是CSI-RS。对于一个小区覆盖范围内的所有UE，小区发送的CSI-RS序列是相同的、且向每个UE发送CSI-RS序列使用的时频资源不同。例如，CSI-RS序列
Figure PCTCN2018080558-appb-000001
可以根据公式(1)计算获得。
Figure PCTCN2018080558-appb-000002
其中，公式(1)中的c可以由公式(2)计算获得
Figure PCTCN2018080558-appb-000003
其中C init是伪随机序列初始化，n s是一个系统帧内的slot号，取值范围为0～19，l是一个slot内的symbol号，
Figure PCTCN2018080558-appb-000004
是小区标识，如物理小区标识(英文：Physical Cell Identifier，PCI)。
服务小区通过系统信息(英文：System Information，SI)，例如主信息块(英文：MasterInformationBlock,MIB)或系统信息块(英文：SystemInformationBlock,SIB)，将服务小区发送的下行参考信号使用的时频资源信息告知UE。UE测量服务小区的RSRP，即UE在指定时频资源上，接收服务小区的下行参考信号功率的平均值，将测量结果上报给服务小区所 属基站。
步骤22，基站根据步骤21接收到的测量结果，确定是否满足切换准备条件。可选地，切换准备条件可以根据实际情况进行配置，例如，切换准备条件可以是服务小区的信号质量低于设定阈值、且低于设定阈值持续的时间超过预定时间。基站根据UE上报的测量结果，确认是否满足切换准备条件。确认满足切换准备条件，可以被视为基站为相邻小区配置用以发送下行参考信号的时频资源这一动作的触发事件。
如果满足切换准备条件，则执行步骤23和步骤24。如果不满足切换准备条件，则返回步骤21，基站继续接收UE上报的对服务小区的下行参考信号的测量结果。
步骤23，基站通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号。
基站保存有当前所有可用于网络侧发送下行参考信号的时频资源信息，当满足切换准备条件时，基站为一个或多个相邻小区分别配置用以向UE发送下行参考信号的时频资源。基站可以通过X2接口，将配置的时频资源通知相邻小区所属的基站。以两个相邻小区为例，服务小区所属的基站通过基站之间的X2接口，将为相邻小区1分配的时频资源通知相邻小区1所属的基站，将为相邻小区2分配的时频资源通知相邻小区2所属的基站。相邻小区在获得基站的通知之前，无需向UE发送下行参考信号。
在本申请实施例中，相邻小区是服务小区所属的基站为UE确定出的。可选地，在网络规划时，就确定出了小区之间的相对位置关系，例如网络规划者设计网络拓扑。当然，在网络运行过程中，网络拓扑也可以根据需求更新网络拓扑。服务小区可以根据网络拓扑确定相邻小区，相邻小区可以是物理位置上与服务小区相邻的其他小区。
相邻小区所属的基站，通过X2接口接收到服务小区所属的基站通知后，根据通知配置天线端口，使得相邻小区在配置的时频资源上向UE发送下行参考信号。可选地，下行参考信号是CSI-RS。
步骤24，基站通知所述UE使用所述基站配置的时频资源接收下行参考信号。
可选地，基站以显示或隐式的方式通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号。
可选地，在本实施例中显示通知方式包括通过服务小区的物理广播信道(英文：Physical Broadcast Channel，PBCH)等信道、或者专用的RRC信令告知UE一个或多个相邻小区分别使用的时频资源。显示通知方式的优点在于网络侧和UE的通过简单的处理，即可快速得知通知的时频资源，对基站和UE的处理资源的耗费较少。然而需要占用空口资源，空口资源开销较大。
隐式通知方式包括通过对服务小区的PBCH加扰的方式将一个或多个相邻小区分别使用的时频资源告知UE。UE可以通过盲检、解码等处理得知一个或多个相邻小区分别使用的时频资源。隐式通知方式的优点是无需占用额外的空口资源，能够节约空口资源。然而隐式通知方式中，网络侧和UE对于所传输的数据的处理过程较为复杂，对基站和UE处理资源的耗费较多。
对于UE来说，UE根据服务小区所属基站的通知，确定所述基站配置的时频资源；使用所述基站配置的时频资源接收下行参考信号。可选地，UE对接收到的下行参考信号进行测量，将测量结果上报给所述基站。
根据本申请实施例提供的参考信号的发送方法，服务小区所属的基站接收UE发送的对所述UE的服务小区的下行参考信号的测量结果。当该基站根据测量结果确认满足预定切换准备 条件时，通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，并通知UE使用所述基站配置的时频资源接收下行参考信号。相邻小区在获得服务小区所属的基站的上述通知之前，无需向UE发送下行参考信号。相邻小区在接收到上述通知之前，可以使用上述配置的资源传输其他数据。通过上述方法，网络侧可以配置各小区在间隔地使用指定的资源向UE发送下行参考信号，各小区无需持续占用固定的时频资源发送下行参考信号。从而节约了网络侧向UE发送下行参考信号占用的时频资源，提高了空口资源利用率。
可选地，在相邻小区使用基站配置的时频资源向所述UE发送下行参考信号一段时间后，可以采用特定机制收回配置的时频资源，这样网络侧可以重新使用上述配置的时频资源向UE发送业务数据，从而提升资源利用率。网络侧可以通过以下几种方式收回配置的时频资源。
方式一，基站根据UE上报的对在配置的时频资源接收到的下行参考信号进行测量得到的测量结果测量结果，通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
请参考附图3，在附图2中的步骤23和步骤24之后，还包括：
步骤25，基站接收UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果。
步骤26，基站根据步骤25接收到的测量结果，判断是否满足资源收回条件。资源收回条件可以根据实际情况进行配置。包括但不限于以下几种：
资源收回条件1：根据步骤24接收到的测量结果，确定需要进行小区切换。
资源收回条件2：根据步骤24接收到的测量结果，确定UE停留的固定位置上。例如，在一段时间内，各小区的测量结果变化幅度小于设定阈值，则可以认为UE停留的固定位置上。
资源收回条件3：根据步骤24接收到的测量结果，确定相邻小区的信号质量较差，无需切换。例如，相邻小区的信号质量低于服务小区超过设定阈值、且低于服务小区超过设定阈值持续的时间超过设定时长，则可以认为相邻小区的信号质量较差。
如果满足资源收回条件，执行步骤27。如果不满足资源收回条件，则返回步骤25，继续等待接收测量报告。
步骤27，基站通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。例如，基站可以通过基站之间的X2接口，向相邻小区通知测量停止指令。相邻小区接收到测量停止指令后，停止使用此前配置的时频资源向所述UE发送下行参考信号。
方式二，在附图2的步骤23中，基站通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号时，将测量终止时间携带在时频资源信息中告知相邻小区。
具体地，时频资源信息不仅包含时域资源信息和频域资源信息，还包含有效时间信息，所述有效时间信息用于指示所述基站配置的时频资源被用于发送下行参考信号的时间段，当到达所述有效时间段的终止时间时，所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。示例性地，有效时间信息为70ms，相邻小区接收到时频资源信息后，开始使用配置时频资源向所述UE发送下行参考信号。并且在启动发送下行参考信号时设置定时器，定时器的时长设置为70ms。当定时器设置的时间到期时，停止使用配置时频资源向所述UE发送下行参考信号。
方式三，各相邻小区根据预先设置，默认在开始使用配置时频资源向所述UE发送下行参考信号到达预定时间后，停止使用配置时频资源向所述UE发送下行参考信号。具体地，网络侧预先配置各基站的发送下行参考信号的时长。示例性地，所有基站都默认在收到如附图2 中步骤23所示的服务小区所属基站的通知后，开始使用配置时频资源向所述UE发送下行参考信号。并且在启动发送下行参考信号时设置定时器，例如定时器的时长可以设置为50ms。当定时器设置的时间到期时，停止使用配置时频资源向所述UE发送下行参考信号。
关于附图2和附图3中的步骤23，基站通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，本申请实施例还提供了多种具体通知方式。相应地，关于附图2和附图3中的步骤24，基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，本申请实施例也提供了多种具体通知方式。下面将结合附图4至附图9，着重对具体通知方式进行详细说明。其中在附图4、附图5、附图6分别所示的参考信号的发送方法中，服务小区所属的基站是通过显式的方式将时频资源信息通知UE。在附图7、附图8分别所示的参考信号的发送方法中，服务小区所属的基站是通过隐式的方式将时频资源信息通知UE。
附图4是本申请实施例提供的一种参考信号的发送方法的流程图。
步骤40，基站通过服务小区向UE发送下行参考信号。在本实施例中，基站是UE的服务小区所属的基站。可选地，下行参考信号是CSI-RS。
步骤41，基站接收UE发送的对所述UE的服务小区的下行参考信号的测量结果。在本实施例中，不经说明的情况下，基站是指UE的服务小区所属的基站。
步骤40和步骤41的实现方式与附图2中步骤21基本类似，可以参照前面实施例对附图2中步骤21的描述，在这里不再赘述。
步骤42，基站根据步骤41接收到的测量结果，确定是否满足切换准备条件。步骤42的实现方式与附图2中步骤22基本类似，可以参照前面实施例对附图2中步骤22的描述，在这里不再赘述。如果满足切换准备条件，则执行步骤43和步骤44。如果不满足切换准备条件，则返回步骤40，即基站继续通过服务小区向UE发送下行参考信号，接收UE对服务小区发送的参考信号进行测量后得到的测量结果。
步骤43，基站向相邻小区发送通知消息，所述通知消息中携带时频资源信息，所述时频资源信息用于指示配置的时频资源。
请参照附图2步骤23中的描述，基站为相邻小区配置用以向UE发送下行参考信号的时频资源。然后将用于指示配置的时频资源的时频资源信息携带在通知消息中，通过基站之间的X2接口将通知消息发送给相邻小区所属的基站。所述通知消息用于通知所述相邻小区使用所述时频资源信息指示的时频资源向所述UE发送下行参考信号。
可选地，通知消息中不仅携带时频资源信息，还携带相邻小区的标识，以便于相邻小区所属的基站接收到通知消息后，建立相邻小区与时频资源信息之间的对应关系，然后对相邻小区的端口进行配置，使用所述时频资源信息指示的时频资源向所述UE发送下行参考信号。示例性地，服务小区所属的基站生成通知消息，通知消息中携带为相邻小区1分配的时频资源对应的时频资源信息、以及相邻小区1的标识。服务小区所属的基站再将生成的通知消息通过X2接口发送给相邻小区1所属的基站。相邻小区在获得通知消息之前，无需向UE发送下行参考信号。
步骤44，基站使用除服务小区的PBCH之外的其他物理信道向所述UE发送指示信令，所述指示信令中携带所述时频资源信息。关于时频资源信息的描述请参照前面实施例中的描述，在这里不再重复。
可选地，在本实施例中，指示信令是RRC消息。具体地，在LTE网络中，RRC消息形式的指示信令可以通过SIB发送给UE，SIB占用的时频资源请参考相关标准文档。在探讨中的 NR网络中，RRC消息形式的指示信令也可以通过剩余最小化系统信息(英文：remaining minimum system information，RMSI)发送给UE，其中RMSI可以通过PBCH、或者物理下行控制信道(英文：Physical Downlink Control Channel，PDCCH)传输；RRC消息形式的指示信令也可以通过其余系统信息(英文：Other system information，OSI)发送给UE，OSI可以通过物理下行共享信道(英文：Physical Downlink Shared Channel，PDSCH)传输。
指示信令用于通知UE使用所述时频资源信息指示的时频资源接收下行参考信号。
对于UE而言，UE在除所述服务小区的PBCH之外的其他物理信道上，接收所述基站发送的指示信令。UE使用所述时频资源信息指示的时频资源接收下行参考信号，并对接收到的下行参考信号进行测量，将测量结果上报给所述基站。
可选地，RRC消息形式的指示信令中不仅携带时频资源信息，还携带相邻小区的标识，以便于UE对时频资源信息指示的时频资源上接收到的参考信号进行测量，得到测量结果后，将测量结果和相邻小区标识上报给网络侧。当然RRC消息也可以不携带相邻小区的标识，UE可以将测量结果以及时频资源信息上报给网络侧，由于服务小区所属的基站保存有相邻小区的标识与用于指示配置的时频资源的时频资源信息的对应关系，该基站仍然可以确认测量结果与相邻小区的标识之间的对应关系。
可选地，为了能够提高时频资源利用率，当相邻小区使用配置的时频资源向UE发送下行参考信息的动作持续一段时间后，网络侧可以收回配置的时频资源用于传输其他数据。收回时频资源可以采用多种方式，如前面实施例中的描述。本实施例中仅以方式一进行描述。在步骤43和步骤44之后，执行步骤45。
步骤45，基站接收UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果。UE除了上报的测量结果之外，还应上报相邻小区标识或者用于指示生成测量结果所依据的下行参考信号所占用的时频资源的时频资源信息。这样基站可以确认测量结果与相邻小区的对应关系。
步骤46，基站根据步骤45接收到的测量结果，判断是否满足资源收回条件。如果满足资源收回条件，执行步骤47。如果不满足资源收回条件，则返回步骤45，继续等待接收测量报告。关于资源收回条件的相关内容，请参考前面实施例中的描述，在这里不再赘述。
步骤47，基站通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
步骤46和步骤47与附图3所示实施例中的步骤26和步骤27类似，可以参考前面实施例对附图3中步骤26和步骤27的描述，在这里不再赘述。
附图5是本申请实施例提供的一种参考信号的发送方法的流程图。基站通过PBCH将配置的时频资源信息通知UE，即附图4中的步骤44也可以通过步骤54替代。附图5中的步骤50、步骤51、步骤52、步骤53分别于附图4中的步骤40、步骤41、步骤42、步骤43类似，可以参照前面实施例对附图4中这些步骤的描述，在这里不再赘述。
步骤54，基站通过所述服务小区的PBCH通知所述UE所述时频资源信息。关于时频资源信息的描述请参照前面实施例中的描述，在这里不再重复。
可选地，在本实施例中，指示信令是RRC消息。具体地，在LTE网络中，RRC消息形式的指示信令可以通过MIB发送给UE。MIB可以通过PBCH传输。
指示信令用于通知UE使用所述时频资源信息指示的时频资源接收下行参考信号。
对于UE而言，在所述服务小区的PBCH中接收所述基站发送的时频资源信息。UE使用 所述时频资源信息指示的时频资源接收下行参考信号，并对接收到的下行参考信号进行测量，将测量结果上报给所述基站。
可选地，RRC消息形式的指示信令中不仅携带时频资源信息，还携带相邻小区的标识，以便于UE对时频资源信息指示的时频资源上接收到的参考信号进行测量，得到测量结果后，将测量结果和相邻小区标识上报给网络侧。当然RRC消息也可以不携带相邻小区的标识，UE可以将测量结果以及时频资源信息上报给网络侧，由于服务小区所属的基站保存有相邻小区的标识与用于指示配置的时频资源的时频资源信息的对应关系，该基站仍然可以确认测量结果与相邻小区的标识之间的对应关系。
附图6是本申请实施例提供的一种参考信号的发送方法的流程图。基站将时频资源信息划分为至少两部分，通过PBCH将部分时频资源信息通知UE，通过其他物理信道将其余时频资源信息通知UE。即附图4中的步骤44也可以通过步骤641、步骤642和步骤643替代。附图5中的步骤60、步骤61、步骤62、步骤63分别与附图4中的步骤40、步骤41、步骤42、步骤43类似，可以参照前面实施例对附图4中这些步骤的描述，在这里不再赘述。
步骤641，基站将用于指示配置的时频资源的时频资源信息划分为两部分，例如第一部分信息和第二部分信息。
步骤642，基站通过服务小区的PBCH通知UE所述时频资源信息中的部分信息。
步骤643，基站向所述UE发送指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。
例如，基站将时频资源信息中的部分信息(如第一部分信息)携带在RRC消息形式的第一指示信令中，将指第一示信令通过MIB发送给UE。MIB可以通过PBCH传输。基站向所述UE发送第二指示信令，所述第二指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息(如第二部分信息)。请参照附图4中步骤44的相关描述，第二指示信令可以通过SIB、RMSI或OSI发送给UE，携带第二部分信息的第二指示信令通过PDCCH传输。在这里不再赘述。
对于UE而言，UE在所述服务小区的PBCH中接收所述基站发送的时频资源信息中的部分信息。所述UE在除所述服务小区的PBCH之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。所述UE对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息。UE使用所述时频资源信息指示的时频资源接收下行参考信号，并对接收到的下行参考信号进行测量，将测量结果上报给所述基站。
在附图4、附图5、附图6分别所示的参考信号的发送方法中，服务小区所属的基站是通过显式的方式将时频资源信息通知UE。下面将通过附图7、附图8分别介绍几种服务小区所属的基站通过隐式方式将时频资源信息通知UE的方案。
附图7是本申请实施例提供的另一种参考信号的发送方法的流程图。基站根据时频资源信息对PBCH进行加扰，从而将时频资源信息通知UE。即附图4中的步骤44也可以通过步骤741、步骤742和步骤743替代。附图7中的步骤70、步骤71、步骤72、步骤73分别与附图4中的步骤40、步骤41、步骤42、步骤43类似，可以参照前面实施例对附图4中这些步骤的描述，在这里不再赘述。
步骤741，基站对用以指示配置的时频资源的时频资源信息进行编码，获得编码结果。
可选地，下面给出了一个时频资源信息编码格式的示例，具体定义了编码中每个bit的含义，仅作说明使用，并不对具体编码格式造成限制。
示例1：通过10bit对时频资源信息进行指示：1010 0100 01。其中低位(从右边开始)的2bit指示相邻小区数量，本例中为01，表示只携带了1个相邻小区的时频资源信息。第3～6bit的0100指示为相邻小区1配置用于发送下行参考信号的RE在时域的位置，第7～10bit指示为相邻小区1配置用于发送下行参考信号的RE在频域的位置。
示例2：通过18位时频资源信息进行指示：1010 0100 1011 1100 10。其中低位的2bit指示相邻小区数量，本例中为10，表示携带了2个相邻小区的时频资源信息。其中3～6bit指示为相邻小区1配置用于发送下行参考信号的RE在时域的位置，7～10bit指示相邻小区2配置用于发送下行参考信号的RE在时域的位置，11～14bit指示为相邻小区1配置用于发送下行参考信号的RE在频域的位置，15～18bit指示为相邻小区2配置用于发送下行参考信号的RE在频域的位置。
步骤742，基站将所述编码结果输入移位寄存器，获得伪随机序列。
步骤743，基站使用所述伪随机序列对所述服务小区的PBCH进行加扰。
对于UE而言，对所述服务小区的PBCH进行盲检以确定所述PBCH是否被加扰。如果所述PBCH被加扰，对所述被加扰的PBCH进行解扰，确定解扰结果为伪随机序列。对所述伪随机序列进行解码，确定解码结果为所述时频资源信息。UE使用所述时频资源信息指示的时频资源接收下行参考信号，并对接收到的下行参考信号进行测量，将测量结果上报给所述基站。
附图8是本申请实施例提供的另一种参考信号的发送方法的流程图。服务小区所属基站通过显式和隐式相结合的方式将时频资源信息通知UE，即将一部分时频资源信息通过PBCH发送给UE、且使用其余时频资源信息对PBCH加扰。即附图4中的步骤44也可以通过步骤841、步骤842和步骤843替代。附图8中的步骤80、步骤81、步骤82、步骤83分别与附图4中的步骤40、步骤41、步骤42、步骤43类似，可以参照前面实施例对附图4中这些步骤的描述，在这里不再赘述。本实施例着重对步骤841、步骤842和步骤843进行说明。
步骤841，基站对用以指示配置的时频资源的时频资源信息进行编码，获得编码结果。
步骤842，基站将所述编码结果中的部分信息输入移位寄存器，获得伪随机序列。可选地，基站将编码结果划分为两部分，例如第一部分信息和第二部分信息。基站将第一部分信息输入移位寄存器，获得伪随机序列。
步骤843，所述基站通过服务小区的PBCH通知所述UE所述编码结果除所述部分信息之外的其余信息，且使用所述伪随机序列对所述PBCH进行加扰。
示例性地，基站通过服务小区的PBCH将携带第二部分信息的指示信令发送给UE，并且使用伪随机序列对所述PBCH进行加扰
对于UE而言，对所述服务小区的PBCH进行盲检以确定所述PBCH是否被加扰。如果所述PBCH被加扰，UE对所述被加扰的PBCH进行解扰，确定解扰结果为伪随机序列。UE对所述伪随机序列进行解码，确定解码结果为所述时频资源信息中的部分信息。UE进一步对解扰后的所述PBCH解码，获取PBCH中发送的的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。所述UE对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息。UE使用所述时频资源信息指示的时频资源接收下行参考信号，并对接收到的下行参考信号进行测量，将测量结果上报给所述基站。
附图9是本申请实施例提供的另一种参考信号的发送方法的流程图。不同于附图4至附图8所示的参考信号的发送方法，以基站为例的网络侧设备和UE均预先存储相同的索引表，该索引表中保存时频资源信息索引与时频资源信息的对应关系。服务小区所属的基站在向相邻小区或UE通知配置的时频资源时，可以用时频资源索引替代上面各个实施例中的时频资源信息。附图9着重从服务小区所属的基站的角度，对参考信号的发送方法进行描述。在不加说明的情况下，基站是指服务小区所属的基站。
步骤90，基站通过服务小区向UE发送下行参考信号。在本实施例中，基站是UE的服务小区所属的基站。可选地，下行参考信号是CSI-RS。
步骤91，基站接收UE发送的对所述UE的服务小区的下行参考信号的测量结果。
步骤90和步骤91的实现方式与附图2中步骤21基本类似，可以参照前面实施例对附图2中步骤21的描述，在这里不再赘述。
步骤92，基站根据步骤91接收到的测量结果，确定是否满足切换准备条件。步骤92的实现方式与附图2中步骤22基本类似，可以参照前面实施例对附图2中步骤22的描述，在这里不再赘述。如果满足切换准备条件，则执行步骤93和步骤94。如果不满足切换准备条件，则返回步骤90，即基站继续通过服务小区向UE发送下行参考信号，接收UE对服务小区发送的参考信号进行测量后得到的测量结果。
步骤93，基站向相邻小区发送通知消息，所述通知消息中携带时频资源信息索引。所述时频资源信息索引用于从预先存储的索引表中查找到与时频资源信息索引对应的时频资源信息，所述时频资源信息用以指示所述配置的时频资源。表1是本申请实施例提供的索引表的示例。
表1
时频资源信息索引 时频资源信息 端口号
1  (k1,l1)   port1
2  (k2,l2)   port2
3  (K3,l3)   port4
4  (K4,l4)   Port8
表1中的k1、k2、k3或k4用来表示RE在频域上的位置，l1、l2、l3或l4用来表示RE在时域上的位置。
请参照附图2步骤23中的描述，基站为相邻小区配置用以向UE发送下行参考信号的时频资源。基站在表1所示的索引表中查找用于指示配置的时频资源的时频资源信息对应的时频资源信息索引，然后将查找到的时频资源信息索引携带在通知消息中，通过基站之间的X2接口将通知消息发送给相邻小区所属的基站。所述通知消息用于通知所述相邻小区使用所述时频资源信息指示的时频资源向所述UE发送下行参考信号。
可选地，通知消息中不仅携带时频资源信息，还携带相邻小区的标识。请参照附图4中步骤43的详细说明。
示例性地，服务小区所属的基站为相邻小区1分配的时频资源的时频资源信息为(k1,l1)，在索引表中对应的时频资源信息索引为1。基站生成通知消息，通知消息中携带时频资源信息索引1、以及相邻小区1的标识。服务小区所属的基站再将生成的通知消息通过X2接口发送给相邻小区1所属的基站。相邻小区1接收到通知消息后，根据时频资源信息索引1从索引表中查找到对应的时频资源信息为(k1,l1)，在时频资源信息(k1,l1)所指示的时频资源 上向UE发送下行参考信号。相邻小区1在获得通知消息之前，无需向UE发送下行参考信号。
与时频资源信息相比，时频资源信息索引占用的数据量较少，例如通过2bit的时频资源信息索引，可以区分4种不同的时频资源信息。
步骤94，基站向所述UE发送指示信令，所述指示信令中携带所述时频资源信息索引。关于时频资源信息的描述请参照前面实施例中的描述，在这里不再重复。
可选地，在本实施例中，指示信令是RRC消息。在LTE网络中，RRC消息形式的指示信令可以通过SIB或MIB发送给UE，SIB或MIB分别占用的时频资源请参考相关标准文档。在探讨中的NR网络中，RRC消息形式的指示信令也可以通过MIB、或RMSI发送给UE，其中MIB可以通过PBCH传输，RMSI可以通过PBCH、或者PDCCH传输；RRC消息形式的指示信令也可以通过其余系统信息OSI发送给UE，OSI可以通过PDSCH传输。
对于UE而言，UE接收所述基站发送的指示指令，所述指示信令中携带所述时频资源信息索引。UE从存储的索引表中，查找与所述时频资源信息索引对应的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。UE使用所述时频资源信息指示的时频资源接收下行参考信号，并对接收到的下行参考信号进行测量，将测量结果上报给所述基站。
可选地，指示信令中不仅携带时频资源信息，还携带相邻小区的标识。请参照附图4中步骤44的详细说明。
本申请实施例提供的参考信号的发送方法，基站UE均预先存储索引表，服务小区所属的基站在向相邻小区或UE通知配置的时频资源时，可以在通知消息或指令信息中携带时频资源信息索引。由于时频资源信息索引的数据量远小于时频资源信息，因此与显示通知方式相比，可以节省基站之间的传输资源，也可以节省基站与UE之间的空口资源，进一步提高了资源利用率。
本申请实施例还提供了一种网络设备，示例性地，该网络设备是基站。下面结合附图10以基站为例，对网络设备的结构和功能进行描述。附图10是基站的结构示意图，该基站作为附图1至附图9中的UE的服务小区所属的基站，实现附图1至附图9所示的各实施例中的UE的服务小区所属的基站的功能。如图10所示，该基站包括收发器101和处理器102。
可选地，收发器101可以称为远端射频单元(remote radio unit，RRU)、收发单元、收发机、或者收发电路等等。收发器101可以包括至少一个天线1011和射频单元1012，收发器101可以用于射频信号的收发以及射频信号与基带信号的转换。
可选地，基站包括一个或多个基带单元(英文：baseband unit，简称：BBU)103。该基带单元包括处理器102。基带单元103主要用于进行基带处理，如信道编码，复用，调制，扩频等，以及对基站进行控制。收发器101与该基带单元103可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
在一个示例中，基带单元103可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网，也可以分别支持不同接入制式的无线接入网。基带单元103包括处理器101。处理器102可以用于控制网络设备执行前述各方法实施例中的相应操作。可选地，基带单元103还可以包括存储器104，用以存储必要的指令和数据。
所述收发器101，用于向UE发送服务小区的下行参考信号，接收UE发送的对所述服务小区的下行参考信号的测量结果。
所述处理器102，用于根据所述测量结果确定是否满足预定切换准备条件。
所示收发器101，还用于在如果满足预定切换准备条件时，通知一个相邻小区使用配置 的时频资源向所述UE发送下行参考信号，所述相邻小区在被通知之前无需向所述UE发送下行参考信号；以及通知所述UE使用所述基站配置的时频资源接收下行参考信号。
可选地，收发器101通知相邻小区使用配置的时频资源向所述UE发送下行参考信号、以及通知UE使用所述基站配置的时频资源接收下行参考信号的具体方式请参照前面方法实施例中的描述，尤其是附图4至附图9的相关说明，在这里不再重复。
本申请实施例提供了一种以基站为例的网络设备，该网络设备为UE的服务小区所属的基站。该基站接收UE发送的对UE的服务小区的下行参考信号的测量结果。当该基站根据测量结果确认满足预定切换准备条件时，通知相邻小区使用所述基站配置的时频资源向UE发送下行参考信号，并通知UE使用所述基站配置的时频资源接收下行参考信号。相邻小区在获得服务小区所属的基站的上述通知之前，无需向UE发送下行参考信号，可以使用上述配置的资源传输其他数据。从而节约了网络侧向UE发送下行参考信号占用的时频资源，提高了空口资源利用率。
可选地，在相邻小区使用基站配置的时频资源向所述UE发送下行参考信号一段时间后，网络侧可以采用特定机制收回配置的时频资源，这样网络侧可以重新使用上述配置的时频资源向UE发送业务数据，从而提升资源利用率。具体地收回配置的时频资源的方式请参照附图2中的描述。
针对于第一种收回配置的时频资源的方式，
收发器101，还用于接收所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果；根据所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果，通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
具体地，处理器102根据收发器101接收到的UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果，判断是否满足资源收回条件。如果满足资源收回条件，则收发器101通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
本申请实施例还提供了一种网络设备，示例性地，该网络设备是基站。下面结合附图11以基站为例，对网络设备的结构和功能进行描述。附图11是基站的结构示意图，该基站作为附图1至附图9中的UE的服务小区所属的基站，具备附图1至附图9所示的实施例中一个实施例中的服务小区所属的基站的功能。如图11所示，该基站包括收发单元111和处理单元112。该收发单元111和该处理单元112可以是软件实现也可以是硬件实现。在硬件实现的情况下，该收发单元111可以是图10中的收发器101，该处理单元112可以是图10中的处理器102。
本申请实施例还提供了一种UE。应理解，该UE可以是上述各方法实施例中的UE，可以具有各方法实施例中的UE的任意功能。附图12是UE的结构示意图，该UE作为附图1至附图9中的UE，实现附图1至附图9的一个实施例所示的UE的功能。如图12所示，该基站包括处理器121和收发器122。
可选地，收发器122可以包括控制电路和天线，其中，控制电路可用于基带信号与射频信号的转换以及对射频信号的处理，天线可用于收发射频信号。
可选地，该装置还可以包括终端设备的其他主要部件，例如，存储器、输入输出装置等。
处理器121可用于对通信协议以及通信数据进行处理，以及对整个终端设备进行控制，执行软件程序，处理软件程序的数据，例如用于支持终端设备执行前述方法实施例中的相应 操作。存储器123主要用于存储软件程序和数据。当终端设备开机后，处理器121可以读取存储器中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。
在一个实施例中，处理器121用于根据基站的通知，确定所述基站配置的时频资源，所述基站为所述UE的服务小区所属的基站。
收发器122用于使用所述基站配置的时频资源接收下行参考信号。
本申请实施例提供的UE，根据服务小区所属基站的通知，在配置的时频资源上接收相邻小区发送的下行参考信号。与网络设备相配合，能够节约网络侧向UE发送下行参考信号占用的时频资源，提高了空口资源利用率。由于UE能够根据服务小区所属基站的通知，使用所述基站配置的时频资源接收下行参考信号，提高了接收下行参考信号的针对性，有助于节约UE的能量消耗。
可选地，处理器121如何根据收发器122接收到的基站的通知，确定所述基站配置的时频资源的具体方式以及实现细节，请参照前面方法实施例中的描述，尤其是附图4至附图9的相关说明，在这里仅作简单说明。
在一个实施例中，收发器122，用于在除所述服务小区的PBCH之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
处理器121，用于根据所述时频资源信息确定所述基站配置的时频资源。
在另一个实施例中，收发器122，用于在所述服务小区的PBCH中接收所述基站发送的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
处理器121，用于根据所述时频资源信息确定所述基站配置的时频资源。
在另一个实施例中，收发器122，用于在所述服务小区的PBCH中接收所述基站发送的时频资源信息中的部分信息；以及在除所述服务小区的PBCH之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。
处理器121，用于对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源；根据所述时频资源信息确定所述基站配置的时频资源。
在另一个实施例中，收发器122，用于对所述服务小区的PBCH进行盲检以确定所述PBCH是否被加扰。
处理器121，用于如果所述PBCH是否被加扰，对所述被加扰的PBCH进行解扰，确定解扰结果为伪随机序列；对所述伪随机序列进行解码，确定解码结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源；根据所述时频资源信息确定所述基站配置的时频资源。
在另一个实施例中，收发器122，用于对所述服务小区的PBCH进行盲检以确定所述PBCH是否被加扰。
处理器121，用于如果所述PBCH是否被加扰，对所述被加扰的PBCH进行解扰，确定解扰结果为伪随机序列；对所述伪随机序列进行解码，确定解码结果为所述时频资源信息中的部分信息。
所述收发器122，还用于获取解扰后的所述PBCH中发送的的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。
所述处理器121，还用于对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源；根据所述时频资源信息确定所述基站配置的时频资源。
在另一个实施例中，收发器122，用于接收所述基站发送的指示指令，所述指示信令中携带所述时频资源信息索引。
处理器121，用于从存储的索引表中，查找与所述时频资源信息索引对应的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
在另一个实施例中，处理器121，还用于对在所述配置的时频资源上接收到的下行参考信号进行测量，将测量结果上报给所述基站。
本申请实施例还提供了一种UE。应理解，该UE可以是上述各方法实施例中的UE，可以具有各方法实施例中的UE的任意功能。附图13是UE的结构示意图，该UE作为附图1至附图9中的UE，实现附图1至附图9的一个实施例所示的UE的功能。如图13所示，该基站处理单元131和收发单元132。该处理单元131和该收发单元132可以是软件实现也可以是硬件实现。在硬件实现的情况下，该处理单元131可以是图12中的处理器121，该收发单元132可以是图12中的收发器112。
本发明实施例还提供了一种通信系统，包括上述实施例中的UE的服务小区所属的基站和UE。基站和UE的功能，以及相互信息交互的详细过程，请参考前面实施例中的描述。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (36)

  1. 一种参考信号的发送方法，其特征在于，包括：
    基站接收UE发送的对所述UE的服务小区的下行参考信号的测量结果，所述基站是所述服务小区所属的基站；
    所述基站根据所述测量结果确定是否满足预定切换准备条件；
    如果满足预定切换准备条件，所述基站通知相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，所述相邻小区在被通知之前无需向所述UE发送下行参考信号，以及
    所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号。
  2. 根据权利要求1所述的方法，其特征在于，所述通知一个相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，包括：
    所述基站向所述相邻小区发送通知消息，所述通知消息中携带所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
  3. 根据权利要求2所述的方法，其特征在于，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
    所述基站使用除所述服务小区的物理广播信道之外的其他物理信道向所述UE发送指示信令，所述指示信令中携带所述时频资源信息。
  4. 根据权利要求2所述的方法，其特征在于，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
    所述基站通过所述服务小区的物理广播信道通知所述UE所述时频资源信息。
  5. 根据权利要求2所述的方法，其特征在于，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
    所述基站通过所述服务小区的物理广播信道通知所述UE所述时频资源信息中的部分信息；
    所述基站使用除所述物理广播信道之外的其他物理信道向所述UE发送指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。
  6. 根据权利要求2所述的方法，其特征在于，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
    所述基站对所述时频资源信息进行编码，获得编码结果；
    将所述编码结果输入移位寄存器，获得伪随机序列；
    使用所述伪随机序列对所述服务小区的物理广播信道进行加扰。
  7. 根据权利要求2所述的方法，其特征在于，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
    所述基站对所述时频资源信息进行编码，获得编码结果；
    所述基站将所述编码结果中的部分信息输入移位寄存器，获得伪随机序列；
    所述基站通过所述服务小区的物理广播信道通知所述UE所述编码结果除所述部分信息之外的其余信息，且使用所述伪随机序列对所述物理广播信道进行加扰。
  8. 根据权利要求1所述的方法，其特征在于，所述通知一个相邻小区使用所述基站配置的时频资源向所述UE发送下行参考信号，包括：
    所述基站向所述相邻小区发送通知消息，所述通知消息中携带时频资源信息索引，所述时频资源信息索引用于从预先存储的索引表中查找到与频资源信息索引对应的时频资源信息，所述时频资源信息用以指示所述配置的时频资源。
  9. 根据权利要求8所述的方法，其特征在于，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号，包括：
    所述基站向所述UE发送指示信令，所述指示信令中携带所述时频资源信息索引。
  10. 根据权利要求1至9任一所述的方法，其特征在于，所述基站通知所述UE使用所述基站配置的时频资源接收下行参考信号之后，还包括：
    所述基站接收所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果；
    所述基站根据所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果，通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
  11. 根据权利要求1至9任一所述的方法，其特征在于，所述时频资源信息包括时域资源信息、频域资源信息和有效时间信息，所述有效时间信息用于指示所述基站配置的时频资源被用于发送下行参考信号的时间段，当到达所述有效时间段的终止时间时，所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
  12. 一种参考信号的接收方法，其特征在于，包括：
    用户设备UE根据基站的通知，确定所述基站配置的时频资源，所述基站为所述UE的服务小区所属的基站；以及
    使用所述基站配置的时频资源接收下行参考信号。
  13. 根据权利要求12所述的方法，其特征在于，所述UE根据基站的通知，确定所述基站配置的时频资源，包括：
    所述UE在除所述服务小区的物理广播信道之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
  14. 根据权利要求12所述的方法，其特征在于，UE根据基站的通知，确定所述基站配置的时频资源，包括：
    所述UE在所述服务小区的物理物理广播信道中接收所述基站发送的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
  15. 根据权利要求12所述的方法，其特征在于，UE根据基站的通知，确定所述基站配置的时频资源，包括：
    所述UE在所述服务小区的物理广播信道中接收所述基站发送的时频资源信息中的部分信息；
    所述UE在除所述服务小区的物理广播信道之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息；
    所述UE对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信 息用于指示所述配置的时频资源。
  16. 根据权利要求12所述的方法，其特征在于，UE根据基站的通知，确定所述基站配置的时频资源，包括：
    对所述服务小区的物理物理广播信道进行盲检以确定所述物理物理广播信道是否被加扰；
    如果所述物理物理广播信道被加扰，对所述被加扰的物理物理广播信道进行解扰，确定解扰结果为伪随机序列；
    对所述伪随机序列进行解码，确定解码结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
  17. 根据权利要求12所述的方法，其特征在于，UE根据基站的通知，确定所述基站配置的时频资源，包括：
    对所述服务小区的物理物理广播信道进行盲检以确定所述物理物理广播信道是否被加扰；
    如果所述物理物理广播信道被加扰，对所述被加扰的物理物理广播信道进行解扰，确定解扰结果为伪随机序列；
    对所述伪随机序列进行解码，确定解码结果为所述时频资源信息中的部分信息；
    获取解扰后的所述物理物理广播信道中发送的的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息；
    所述UE对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
  18. 根据权利要求12所述的方法，其特征在于，UE根据基站的通知，确定所述基站配置的时频资源，包括：
    接收所述基站发送的指示指令，所述指示信令中携带所述时频资源信息索引；
    从存储的索引表中，查找与所述时频资源信息索引对应的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
  19. 一种基站，所述基站是UE的服务小区所属的基站，其特征在于，所述基站包括收发器和处理器，
    所述收发器，用于接收UE发送的对所述服务小区的下行参考信号的测量结果；
    所述处理器，用于根据所述测量结果确定是否满足预定切换准备条件；
    所述收发器，还用于在如果满足预定切换准备条件时，通知一个相邻小区使用配置的时频资源向所述UE发送下行参考信号，所述相邻小区在被通知之前无需向所述UE发送下行参考信号；以及
    通知所述UE使用所述基站配置的时频资源接收下行参考信号。
  20. 根据权利要求19所述的基站，其特征在于，
    所述收发器，用于向所述相邻小区发送通知消息，所述通知消息中携带所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
  21. 根据权利要求20所述的基站，其特征在于，
    所述收发器，用于使用除所述物理广播信道之外的其他物理信道向所述UE发送指示 信令，所述指示信令中携带所述时频资源信息。
  22. 根据权利要求20所述的基站，其特征在于，
    所述收发器，用于通过所述服务小区的物理广播信道通知所述UE所述时频资源信息。
  23. 根据权利要求20所述的基站，其特征在于，
    所述收发器，用于通过所述服务小区的物理广播信道通知所述UE所述时频资源信息中的部分信息，使用除所述物理广播信道之外的其他物理信道向所述UE发送指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息。
  24. 根据权利要求20所述的基站，其特征在于，
    所述处理器，用于对所述时频资源信息进行编码，获得编码结果；将所述编码结果输入移位寄存器，获得伪随机序列；
    所述收发器，使用所述伪随机序列对所述服务小区的物理广播信道进行加扰。
  25. 根据权利要求20所述的基站，其特征在于，
    所述处理器，用于对所述时频资源信息进行编码，获得编码结果；所述基站将所述编码结果中的部分信息输入移位寄存器，获得伪随机序列；
    所述收发器，用于通过所述服务小区的物理广播信道通知所述UE所述编码结果除所述部分信息之外的其余信息，且使用所述伪随机序列对所述物理广播信道进行加扰。
  26. 根据权利要求19所述的基站，其特征在于，
    所述收发器，用于向所述相邻小区发送通知消息，所述通知消息中携带时频资源信息索引，所述时频资源信息索引用于从预先存储的索引表中查找到与频资源信息索引对应的时频资源信息，所述时频资源信息用以指示所述配置的时频资源。
  27. 根据权利要求26所述的基站，其特征在于，
    所述收发器，还用于向所述UE发送指示信令，所述指示信令中携带所述时频资源信息索引。
  28. 根据权利要求19至27任一所述的基站，其特征在于，
    所述收发器，还用于接收所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果；根据所述UE对在所述配置的时频资源接收到的下行参考信号进行测量得到的测量结果，通知所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
  29. 根据权利要求19至27任一所述的基站，其特征在于，所述时频资源信息包括时域资源信息、频域资源信息和有效时间信息，所述有效时间信息用于指示所述基站配置的时频资源被用于发送下行参考信号的时间段，当到达所述有效时间段的终止时间时，所述相邻小区停止使用所述配置的时频资源向所述UE发送下行参考信号。
  30. 一种用户设备UE，其特征在于，包括收发器和处理器，
    所述处理器，用于根据基站的通知，确定所述基站配置的时频资源，所述基站为所述UE的服务小区所属的基站；
    所述收发器，用于使用所述基站配置的时频资源接收下行参考信号。
  31. 根据权利要求30所述的UE，其特征在于，
    所述收发器，用于在除所述服务小区的物理广播信道之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息，所述时频资源信息用于 指示所述配置的时频资源；
    所述处理器，用于根据所述时频资源信息确定所述基站配置的时频资源。
  32. 根据权利要求30所述的UE，其特征在于，
    所述收发器，用于在所述服务小区的物理物理广播信道中接收所述基站发送的时频资源信息，所述时频资源信息用于指示所述配置的时频资源；
    所述处理器，用于根据所述时频资源信息确定所述基站配置的时频资源。
  33. 根据权利要求30所述的UE，其特征在于，
    所述收发器，用于在所述服务小区的物理广播信道中接收所述基站发送的时频资源信息中的部分信息；以及在除所述服务小区的物理广播信道之外的其他物理信道上，接收所述基站发送的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息；
    所述处理器，用于对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源；
    根据所述时频资源信息确定所述基站配置的时频资源。
  34. 根据权利要求30所述的UE，其特征在于，
    所述收发器，用于对所述服务小区的物理物理广播信道进行盲检以确定所述物理广播信道是否被加扰；
    所述处理器，用于如果所述物理广播信道是否被加扰，对所述被加扰的物理广播信道进行解扰，确定解扰结果为伪随机序列；
    对所述伪随机序列进行解码，确定解码结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源；
    根据所述时频资源信息确定所述基站配置的时频资源。
  35. 根据权利要求30所述的UE，其特征在于，
    所述收发器，用于对所述服务小区的物理广播信道进行盲检以确定所述物理广播信道是否被加扰；
    所述处理器，用于如果所述物理广播信道是否被加扰，对所述被加扰的物理广播信道进行解扰，确定解扰结果为伪随机序列；对所述伪随机序列进行解码，确定解码结果为所述时频资源信息中的部分信息；
    所述收发器，还用于获取解扰后的所述物理广播信道中发送的的指示信令，所述指示信令中携带所述时频资源信息中除所述部分信息之外的其余信息；
    所述处理器，用于对所述时频资源信息中的部分信息以及所述时频资源信息中除所述部分信息之外的其余信息进行合并处理，确定合并处理结果为所述时频资源信息，所述时频资源信息用于指示所述配置的时频资源；
    根据所述时频资源信息确定所述基站配置的时频资源。
  36. 根据权利要求30所述的UE，其特征在于，
    所述收发器，用于接收所述基站发送的指示指令，所述指示信令中携带所述时频资源信息索引；
    所述处理器，用于从存储的索引表中，查找与所述时频资源信息索引对应的时频资源信息，所述时频资源信息用于指示所述配置的时频资源。
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CN114390611B (zh) * 2020-10-22 2024-02-02 大唐移动通信设备有限公司 小区切换方法、终端、基站、装置和存储介质

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