WO2017012397A1 - 无线通信系统中的电子设备和无线通信方法 - Google Patents

无线通信系统中的电子设备和无线通信方法 Download PDF

Info

Publication number
WO2017012397A1
WO2017012397A1 PCT/CN2016/081850 CN2016081850W WO2017012397A1 WO 2017012397 A1 WO2017012397 A1 WO 2017012397A1 CN 2016081850 W CN2016081850 W CN 2016081850W WO 2017012397 A1 WO2017012397 A1 WO 2017012397A1
Authority
WO
WIPO (PCT)
Prior art keywords
reference signal
reference signals
cell
available
electronic device
Prior art date
Application number
PCT/CN2016/081850
Other languages
English (en)
French (fr)
Inventor
竺旭东
王昭诚
陈晋辉
Original Assignee
索尼公司
竺旭东
王昭诚
陈晋辉
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 索尼公司, 竺旭东, 王昭诚, 陈晋辉 filed Critical 索尼公司
Priority to US15/744,148 priority Critical patent/US10206150B2/en
Priority to EP16827088.2A priority patent/EP3328116A4/en
Publication of WO2017012397A1 publication Critical patent/WO2017012397A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • 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
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H04W36/0044—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of quality context information
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • 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
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points

Definitions

  • the present disclosure relates to the technical field of wireless communications, and in particular to electronic devices in wireless communication systems and methods for wireless communication in wireless communication systems.
  • Massive MIMO Multi-input Multi-output
  • simple linear algorithms such as zero-forcing algorithm and minimum mean square error algorithm
  • large-scale MIMO systems can significantly improve the spectral efficiency and energy efficiency of the system at the same time, so it is likely to be adopted as the key to the next generation communication standard. technology.
  • the performance of massive MIMO systems in multi-cell time division multiplexing scenarios is limited by pilot pollution problems. Since the pilot length is limited by the channel coherence length, the number of orthogonal pilots is limited, and pilot reuse or pilot correlation may inevitably occur between different cells. At this time, users using the same or not completely orthogonal pilot sequences in different cells will receive the pilot signals, which will be received by the base station, but the base station cannot effectively distinguish the pilot signals, resulting in channel estimation at the base station. Being disturbed.
  • the base station uses the interfered channel estimation for uplink data detection, in addition to receiving data transmitted by the user of the own cell, data of other cell users is also received, thereby causing inter-cell interference of the uplink.
  • the base station generates the precoding matrix using the interfered channel estimation and transmits the downlink data, the users of other cells receive the data except for the user of the cell, thereby causing inter-cell interference in the downlink.
  • the existing methods for mitigating pilot pollution often have the following problems: 1.
  • the algorithm is too strong, and often only when the number of base station antennas reaches infinity is well satisfied; 2.
  • a large amount of prior information and multi-cell coordination are required.
  • Cooperation with a huge other aspect of the overhead to obtain some performance gains; 3
  • the algorithm complexity is extremely high, it is often difficult to achieve in the actual system. So existing The method of mitigating pilot pollution problems is often difficult to adapt to current technical conditions. Therefore, in practical applications, pilot pollution is still one of the serious problems faced by large-scale MIMO systems.
  • An object of the present disclosure is to provide an electronic device in a wireless communication system and a method for wireless communication in a wireless communication system, such that quality of available pilots can be monitored by interaction information between base stations, thereby implementing pilot Optimize configuration and improve overall system performance.
  • an electronic device in a wireless communication system in which a plurality of cells exist, the plurality of cells including a current cell and a neighboring cell in which the electronic device is located,
  • the electronic device includes: one or more processing circuits, the processing circuit configured to: obtain acquisition information of reference signals of the current cell and the neighboring cell; and determine the The quality of the available reference signals in the current cell; and allocating the available reference signals to the user equipment based on the quality of the available reference signals.
  • the processing circuit may be further configured to: select a plurality of available reference signals having high quality as candidate reference signals; perform each of the received used reference signals and the candidate reference signals Correlating operations to estimate an interference strength from the neighboring cell to which each of the candidate reference signals is received; and assigning an alternate reference signal having a minimum interference strength to the user as the available reference signal having the highest quality device.
  • each of the plurality of cells may comprise a plurality of cell partitions
  • the processing circuit may be further configured to perform the operation of: obtaining a reference signal of a cell partition of each of the current cell and the neighboring cell The allocation information; and determining the quality of the available reference signals in the current cell partition in which the user equipment is located based on the allocation information.
  • the processing circuit may be further configured to: select a plurality of available reference signals having high quality in the current cell partition as candidate reference signals; the received used reference signals and the candidate reference Each of the signals performs a correlation operation to estimate an interference strength of each of the candidate reference signals from the neighboring cell or other cell partition of the current cell; and an alternative having a minimum interference strength Reference signal
  • the user equipment is assigned to the available reference signal with the highest quality.
  • a user equipment in a wireless communication system in which a plurality of cells exist, the plurality of cells including a current cell and a neighboring cell where the user equipment is located
  • the user equipment includes: a transceiver; and one or more processing circuits, the processing circuit configured to cause the transceiver to: receive a used downlink reference signal from the neighboring cell; The base station of the current cell notifies information about the received used downlink reference signal; and receives the available downlink reference signal with the highest quality from the base station of the current cell.
  • a method for wireless communication in a wireless communication system in which a plurality of cells are present, the plurality of cells including a current cell and an adjacent a cell, the method comprising: obtaining allocation information of reference signals of the current cell and the neighboring cell; determining a quality of an available reference signal in the current cell based on the allocation information; and based on the available reference signal The quality assigns the available reference signal to the user equipment.
  • a method for wireless communication in a wireless communication system in which a plurality of cells are included, the plurality of cells including a current cell and a neighboring cell, The method includes receiving a used downlink reference signal from the neighboring cell, notifying a base station of the current cell about information about a received used downlink reference signal, and receiving a highest received from a base station of the current cell The available downlink reference signal for quality.
  • an electronic device in a wireless communication system Using an electronic device in a wireless communication system according to the present disclosure and a method for wireless communication in a wireless communication system, information of a reference signal such as a pilot can be shared by information interaction between base stations and the quality of the available reference signal can be estimated To provide optimal reference signal distribution for newly accessed users.
  • a reference signal such as a pilot
  • the quality of the available reference signal can be estimated
  • the configuration of the reference signal by optimizing the configuration of the reference signal, a larger number of user equipments can be supported, interference between cells can be reduced, and the system can be improved. Overall performance.
  • FIG. 1 is a schematic diagram illustrating a multi-cell multi-user mobile cellular network scenario
  • FIG. 2 is a block diagram illustrating a structure of an electronic device in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 3 is a block diagram illustrating a structure of a determining unit included in an electronic device in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 4 illustrates a block diagram of a structure of an allocation unit included in an electronic device in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram illustrating another scenario of a multi-cell multi-user mobile cellular network
  • FIG. 6 is a block diagram illustrating a structure of a user equipment in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 7 is a flowchart illustrating a method for wireless communication in a wireless communication system, in accordance with an embodiment of the present disclosure
  • 8(a) is a graph illustrating simulation results of channel estimation by different pilot allocation schemes in a simple scenario
  • 8(b) is a graph illustrating a comparison of a user's uplink average SINR (Signal to Interference plus Noise Ratio) for different pilot allocation schemes in a simple scenario;
  • SINR Signal to Interference plus Noise Ratio
  • FIG. 9(a) is a graph showing simulation results of different pilot allocation schemes on channel estimation when a SRS (Sounding Reference Signal) sequence is used in a 3GPP (3rd Generation Partnership Project).
  • 9(b) is a graph illustrating a user uplink average SINR comparison of different pilot allocation schemes when using an SRS sequence in 3GPP;
  • FIG. 10 is a block diagram showing a first example of a schematic configuration of an eNB (evolution Node Base Station) applicable to the present disclosure
  • FIG. 11 is a block diagram showing a second example of a schematic configuration of an eNB suitable for the present disclosure
  • FIG. 12 is a block diagram showing an example of a schematic configuration of a smartphone suitable for the present disclosure.
  • FIG. 13 is a block diagram showing an example of a schematic configuration of a car navigation device applicable to the present disclosure.
  • Example embodiments are provided so that this disclosure will be thorough, and the scope will be fully conveyed by those skilled in the art. Numerous specific details, such as specific components, devices, and methods, are set forth to provide a thorough understanding of the embodiments of the present disclosure. It will be apparent to those skilled in the art that ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; In some example embodiments, well-known processes, well-known structures, and well-known techniques are not described in detail.
  • the UE (User Equipment) involved in the present disclosure includes, but is not limited to, a mobile terminal, a computer, an in-vehicle device, and the like having a wireless communication, particularly a cellular communication function. Further, the UE involved in the present disclosure may also be a key component in the final product such as a chip. Furthermore, the base station involved in the present disclosure may be, for example, an eNB (evolution Node Base Station) or a component such as a chip in an eNB.
  • eNB evolution Node Base Station
  • FIG. 1 illustrates a multi-cell multi-user mobile cellular network scenario in which the technical solutions of the present disclosure may be applied.
  • the different gray levels represent different pilots ⁇ 1 to ⁇ k.
  • a triangle symbol indicates a base station and a circle indicates a UE.
  • pilot reuse may inevitably occur between different cells.
  • UEs using the same or not completely orthogonal pilot sequences in different cells will receive the pilot signals, which will be received by the base station, but the base station cannot effectively distinguish the pilot signals, resulting in channel estimation at the base station. Interference is caused, resulting in inter-cell interference for the uplink and downlink.
  • FIG. 2 illustrates a structure of an electronic device 200 in a wireless communication system according to an embodiment of the present disclosure.
  • electronic device 200 can include processing circuitry 210. It should be noted that the electronic device 200 may include one processing circuit 210 or multiple processing circuits 210. In addition, the electronic device 200 may further include a communication unit 220 and the like.
  • processing circuitry 210 may include various discrete functional units to perform various different functions and/or operations. It should be noted that these functional units may be physical entities or logical entities, and differently named units may be implemented by the same physical entity.
  • the processing circuit 210 may include an acquisition unit 211, a determination unit 212, and an allocation unit 213.
  • the obtaining unit 211 can acquire allocation information of reference signals of the current cell and the neighboring cell.
  • the determining unit 212 can determine the quality of the available reference signals in the current cell.
  • the allocating unit 213 can allocate an available reference signal to the UE.
  • the available reference signal can be allocated to the UE based on the quality of the available reference signals in the current cell. In this way, the best quality reference signal can be allocated to the UE, and the configuration of the reference signal (pilot) is optimized, thereby reducing inter-cell interference and improving the overall performance of the system.
  • FIG. 3 illustrates a structure of a determining unit 300 included in an electronic device in a wireless communication system according to an embodiment of the present disclosure.
  • the determining unit 300 shown in FIG. 3 may correspond, for example, to the determining unit 212 (and the obtaining unit 211) shown in FIG. 2.
  • the determining unit 300 may include an obtaining unit 310, a counting unit 320, and a determining unit 330.
  • the obtaining unit 310 can acquire information of used reference signals of neighboring cells. It should be noted that, in some examples, a cell that may interfere with each other and is not geographically close to each other may also be used as a neighboring cell to exchange information of the used reference signal.
  • counting unit 320 can count the number of used reference signals that are highly coherent with the available reference signals in the current cell. It should be noted that different reference signal sequences caused by cyclic shift can be regarded as different reference signals, and reference signals allocated on different time-frequency resources can also be regarded as different reference signals.
  • the determining unit 330 can determine the quality of the available reference signal based on the result of the counting.
  • counting unit 320 may, for example, count the number of used reference signals that are the same as the available reference signals in the current cell.
  • an electronic device in the wireless communication system according to an embodiment of the present disclosure may order the available reference signals based on the quality of the available reference signals.
  • FIG. 4 illustrates a structure of an allocating unit 400 included in an electronic device in a wireless communication system according to an embodiment of the present disclosure.
  • the dispensing unit 400 shown in FIG. 4 may correspond, for example, to the dispensing unit 213 shown in FIG. 2.
  • the allocation unit 400 may include a selection unit 410, an estimation unit 420, and an allocation unit 430.
  • the selection unit 410 can select a plurality of available reference signals having high quality as candidate reference signals.
  • the available reference signals may be arranged in ascending order of the number of uses, and the first n bits with the least number of multiplexing times are selected as candidate reference signals.
  • the selected number of available reference signals having relatively high quality may be determined based on the accuracy requirements of the channel estimation of the communication system of the specific application and the computing resources and delay requirements of the corresponding electronic device. It can be understood that the more alternate reference signals are selected, the more likely the reference signal from which the estimated interference is to be obtained is closer to the actual situation.
  • the estimating unit 420 may perform a correlation operation on each of the received used reference signal and the candidate reference signal to estimate an interference strength from the neighboring cell that each of the candidate reference signals is subjected to.
  • the allocating unit 430 can allocate the candidate reference signal having the smallest interference strength as the available reference signal having the highest quality to the user equipment.
  • user equipments in the same cell use the same reference signal sequence
  • an LTE base station ie, an eNB applying the disclosed scheme
  • the user equipment in the serving cell includes the indication information related to the reference signal sequence in the cell system information for broadcast.
  • the eNB may also set different cyclic shifts (ie, phase rotations) or transmission combs for processing the reference signals for different user equipments, so that the user equipments of the same cell
  • the reference signals used between them are orthogonal.
  • the eNB indicates the reference signal sequence in the system information and further notifies the corresponding cyclic shift/transmission comb configuration parameters of each user equipment by the higher layer RRC signaling to complete the allocation of the available reference signals.
  • the eNB may coordinate transmission comb configuration parameters, cyclic shift, transmission subframe configuration, and the like with the neighboring cell.
  • the same reference signal may be defined as a reference signal having the same time-frequency resource and sequence
  • the orthogonal reference signal may be defined as a reference signal of orthogonal or sequence orthogonal to the time-frequency resource.
  • the other cases are related reference signals.
  • the same reference signal is an extreme case of the associated reference signal.
  • the processing circuit (such as the acquisition unit 211 shown in FIG. 2) included in the electronic device in the wireless communication system according to an embodiment of the present disclosure may periodically and/or dynamically acquire a reference of the current cell and the neighboring cell. Signal update allocation information. Further, the processing circuit (determination unit 212 shown in FIG. 2) can update the quality of the available reference signals in the current cell based on the update allocation information.
  • each of the plurality of cells may include a plurality of cell partitions as shown in FIG. 5.
  • Figure 5 illustrates another scenario of a multi-cell multi-user mobile cellular network.
  • each cell is divided into a plurality of regions (for example, sectors as shown), and the base station performs reference signal allocation for each sector of the cell it serves, thereby making it within one cell.
  • the same or related reference signals can be shared between different sectors, for example sharing between sectors 1 and 7 that are far apart.
  • a new user equipment needs to be allocated a reference signal
  • the reference signal received by the 0th cell base station may include a user equipment of the neighboring cell.
  • the reference signal sent may also include a reference signal sent by the user equipment in the cell 1, for example, in the cell 1.
  • the reference signal information recorded by the base station is, for example, a neighboring cell sector in which the reference signal is within the corresponding dotted line range, and the base station calculates the number of times of being multiplexed by the neighboring cells within the dotted line range to select an alternative reference signal.
  • the reference signal information exchanged between the cells may be sector level. For example, each cell will record reference signal utilization for its various sectors and interact with neighboring cells to achieve finer reference signal allocation.
  • the acquisition unit 211 as shown in FIG. 2 may acquire the current cell And allocation information of reference signals of cell partitions of each of the neighboring cells. Further, the determining unit 212 can determine the quality of the available reference signals in the current cell partition in which the user equipment is located based on the allocation information.
  • the acquisition unit 310 can acquire information of used reference signals of cell partitions of neighboring cells.
  • counting unit 320 can count the number of used reference signals that are highly correlated with the available reference signals in the current cell partition.
  • the determining unit 330 may determine the quality of the available reference signals based on the result of the counting.
  • counting unit 320 may count the number of used reference signals that are the same as the available reference signals in the current cell partition.
  • the selection unit 410 may select a plurality of available reference signals having high quality in the current cell partition as candidate reference signals.
  • the estimating unit 420 may perform a correlation operation on each of the received used reference signal and the candidate reference signal to estimate that each of the candidate reference signals is received by another cell from the neighboring cell or the current cell.
  • the interference intensity of the partition may be used to estimate that each of the candidate reference signals is received by another cell from the neighboring cell or the current cell.
  • the interference intensity of the partition After that, the allocating unit 430 can allocate the candidate reference signal having the smallest interference strength as the available reference signal having the highest quality to the user equipment.
  • two user equipments within the same LTE cell may transmit the same sequence of reference signals with the same cyclic shift/transmission comb.
  • the processing circuit (such as the acquisition unit 211 shown in FIG. 2) included in the electronic device in the wireless communication system according to an embodiment of the present disclosure may periodically and/or dynamically acquire the current cell and the adjacent cell. Update allocation information of reference signals of each cell partition. Further, the processing circuit (determination unit 212 shown in FIG. 2) can update the quality of the available reference signals in the current cell partition based on the update allocation information.
  • the reference signal mentioned above may be an uplink reference signal, such as an SRS (Sounding Reference Signal) in an LTE system, or a DMRS (Demodulation Reference Signal). signal).
  • an uplink reference signal such as an SRS (Sounding Reference Signal) in an LTE system, or a DMRS (Demodulation Reference Signal). signal).
  • the reference signal mentioned above may also be a downlink reference signal
  • the downlink reference signal is, for example, a CRS (Cell-specific reference signal), a CSI-RS (Channel in the LTE system).
  • CRS Cell-specific reference signal
  • CSI-RS Channel in the LTE system
  • the processing circuit may be selected to have A plurality of high quality available downlink reference signals are used as alternative downlink reference signals to inform the user equipment. Further, the processing circuit can also obtain a report on the used downlink reference signal from the neighboring cell received by the user equipment. Further, the processing circuit (for example, the estimating unit 420 shown in FIG. 4) may perform a correlation operation on each of the used downlink reference signal and the candidate downlink reference signal received by the user equipment to estimate the candidate downlink reference signal. Each of the received interference strengths from neighboring cells. After this, the processing circuitry (e.g., allocation unit 430 as shown in FIG. 4) can assign the alternate downlink reference signal with the lowest interference strength to the user equipment as the available downlink reference signal with the highest quality.
  • the processing circuitry e.g., allocation unit 430 as shown in FIG.
  • the processing circuit does not have to have the function of the estimation unit, but for example, the function can be distributed on the corresponding user equipment side.
  • the processing circuit eg, the selection unit therein
  • the processing circuit eg, the allocation unit therein
  • the alternate downlink reference signal is assigned to the user equipment as the available downlink reference signal with the highest quality.
  • the processing circuit can also determine the reporting threshold and select a plurality of available downlink reference signals having high quality as alternative downlink reference signals to notify the user equipment. After that, in response to the information from the user equipment regarding the candidate downlink reference signal and the expected interference level in which the neighboring cell expected interference value in the candidate downlink reference signal is less than the reported threshold, the processing circuit may select the candidate downlink with the minimum interference strength.
  • the reference signal is assigned to the user equipment as the available downlink reference signal with the highest quality.
  • the wireless communication system as described above may be an LTE-A (Long Term Evolution-Advanced) cellular communication system
  • the electronic device 200 may be a base station
  • the electronic device 200 A communication unit 220 such as a transceiver or the like can also be included.
  • the communication unit 220 can acquire allocation information of a reference signal of a neighboring cell, for example, by X2 signaling.
  • the present disclosure aims to reduce the adverse effects of pilot pollution on the communication system, and thus is not limited to the above LTE system, for example, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) ), WCDMA (Wideband Code Division Multiple Access), WiMAX (Worldwide Interoperability for Microwave Access), etc., in the present or future communication systems that require pilots to estimate channels, Will apply, but not in this one.
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • WiMAX Worldwide Interoperability for Microwave Access
  • the electronic device is implemented as having its own In the example of a mobile base station (for example, supporting a moving cell) or a small base station supporting a dynamic switching function, due to the location of the mobile station and the uncertainty of the surrounding radio environment, the present invention is used in comparison with the conventionally set pilot setting method.
  • the disclosed scheme to dynamically select pilots is more operative and can achieve better transmission performance.
  • FIG. 6 illustrates a structure of a user equipment 600 in a wireless communication system according to an embodiment of the present disclosure.
  • the multiple cells include a current cell and a neighboring cell where the user equipment 600 is located.
  • user device 600 can include processing circuitry 610. It should be noted that the user equipment 600 may include one processing circuit 610 or multiple processing circuits 610. In addition, the user equipment 600 may also include a communication unit 620 such as a transceiver or the like.
  • processing circuit 610 may also include various discrete functional units to perform various different functions and/or operations. These functional units may be physical entities or logical entities, and differently named units may be implemented by the same physical entity.
  • processing circuit 610 can cause communication unit 620 to receive the used downlink reference signals from neighboring cells.
  • the processing circuit 610 can cause the communication unit 620 to notify the base station of the current cell of information about the received used downlink reference signal.
  • processing circuit 610 can cause communication unit 620 to receive the available downlink reference signal with the highest quality from the base station of the current cell.
  • processing circuit 610 can cause communication unit 620 to forward the received used downlink reference signal to the base station of the current cell.
  • processing circuit 610 can process the received used downstream reference signal. As shown in FIG. 6, processing circuit 610 can include an estimation unit 611.
  • processing circuit 610 may first cause communication unit 620 to receive a plurality of candidate downlink reference signals from a base station of the current cell.
  • the estimating unit 611 may perform a correlation operation on each of the received used downlink reference signal and the plurality of candidate downlink reference signals to estimate that each of the plurality of candidate downlink reference signals is received from the neighboring The interference intensity of the cell.
  • the processing circuit 610 can cause the communication unit 620 to transmit information about the interference strength from the neighboring cells received by each of the plurality of candidate downlink reference signals to the current small The base station of the area.
  • each base station may have a pilot stack to store available pilot information, such as in memory.
  • the pilot allocation information of each base station is shared between adjacent base stations.
  • each eNB generates X2 signaling including pilot allocation information, and carries pilot allocation information through X2 signaling to interact between eNBs.
  • the X2 signaling includes, for example, a cell ID, a sequence number of used pilots, a sequence number of a used sequence sequence used, and one or more of a group-hopping pattern with respect to the assigned guide. Frequency indication.
  • pilot quality estimation is performed. Specifically, based on the pilot allocation information interaction mechanism, each base station can perform quality estimation on pilots in its own pilot stack.
  • the pilot allocation is performed. For example, when a new communication device (e.g., a UE) enters the system, the corresponding base station assigns the best quality pilot from its own pilot stack to the communication device.
  • a new communication device e.g., a UE
  • the corresponding base station assigns the best quality pilot from its own pilot stack to the communication device.
  • the quality of the pilot can be used to describe the severity of inter-cell interference caused by using the pilot in the current scenario.
  • the multi-cell cooperation in the present disclosure may only be the pilot information used for interaction between multiple cells, and does not necessarily require each cell to cooperatively adjust the use of the pilot, thereby achieving efficient pilot with low system complexity. use.
  • the base station of the i-th cell will record the used pilot information as follows:
  • the pilot information will be used for mutual sharing between the base stations, where L represents the total number of cells, and ⁇ k, i represents the pilot sequence represented by the row vector with the sequence number k in the i-th cell. A set of pilots that are not used.
  • the number of pilot-related pilots in the adjacent cell is used as follows:
  • the parameter ⁇ i is defined as the threshold value that distinguishes the correlation between ⁇ k ', j and ⁇ k, i , and its value ranges from 0 ⁇ ⁇ i ⁇
  • is the number of elements in the set A
  • for the complex number x is the absolute value of x
  • x H is the conjugate transpose of the vector x.
  • the i th cell is sorted according to C i,k to form an available pilot stack of the current cell, and C i is preferentially allocated , and the k value is small.
  • the base station of the i-th cell will have n higher-quality candidate pilots to form an alternative set (pilot stack) as follows:
  • ⁇ i ⁇ k 1,i ,k 2,i ,...,k n,i ⁇
  • the base station of the i-th cell performs related operations on the received uplink pilot sequence and the candidate pilots to estimate the interference strength to be introduced by using the pilot, and the specific calculation is as follows:
  • the uplink pilot signal received by the base station of the i-th cell may be, for example, an uplink pilot signal sent by another cell user, or may include an uplink pilot signal sent by a user whose own cell has allocated an uplink pilot.
  • the latter case applies to each cell being divided into a plurality of regions (for example, a sector as shown in FIG. 5).
  • the base station may sort the candidate pilots according to the estimation result, and select, for example, an optimal allocation to the new user.
  • the specific criteria may be as follows:
  • a new communication device when it enters the system, it will send a pilot allocation request to the corresponding base station. After confirming the communication device, the base station allocates the best quality pilot from the pilot stack to the communication device.
  • the base station when the quality of service of a certain communication device deteriorates, it will send a request to the corresponding base station to request replacement of a better quality pilot.
  • the corresponding base station receives the request After that, the pilot with the best quality is selected from the pilot stack and replaced with the communication device.
  • the base station estimates the uplink channel according to the pilot of the communication device and performs uplink data collection according to the estimation result.
  • the base station may actively replace the better quality pilot for the communication device.
  • the deprecated pilot when a communication device leaves or is replaced with a new pilot, the deprecated pilot will be recovered.
  • the base station will perform a separate quality estimate on the recovered pilots and then insert them into the pilot stack.
  • the communication devices in the system have different priority levels, and the base station allocates/reservates the better quality pilots to the communication devices with higher priority, and assigns the pilots with better or worse quality to the priority.
  • Low level communication equipment Low level communication equipment.
  • the pilot quality can be fixed interval updated.
  • the system can define a fixed interval, and all base stations can perform quality estimation on the pilots in the pilot stack at fixed time intervals.
  • the pilot quality can also be dynamically updated.
  • the base station updates the pilot quality in the pilot stack only when certain events occur, such as new user joins, pilot replacement, pilot recovery, and the like. Otherwise, the pilot quality follows the information of the previous time period.
  • pilot quality is updated at regular intervals, and there are also dynamic updates.
  • the shadow fading coefficient ⁇ shadow 8 dB.
  • the large-scale fading coefficient ⁇ of the user channel is generated by the propagation path loss and the shadow fading effect, and the position of the user is randomly generated in each experiment.
  • Figure 8(a) plots the simulation results of different pilot allocation schemes on the channel estimate.
  • pilot allocation schemes There are a total of four pilot allocation schemes: 1) a sequential allocation scheme: sequentially assigned to the accessed users according to the subscripts of the pilot sequences; 2) a random allocation scheme: randomly selecting the users assigned to the access from the available pilots; 3) Coordinated pilot allocation scheme: cooperative pilot allocation by statistical pilot usage in surrounding cells; 4) Observation-assisted cooperative pilot allocation scheme: several good quality provided by cooperative pilot allocation scheme
  • the pilot performs inter-cell interference strength estimation, and selects the optimal one. Pilot.
  • the performance of the channel estimation is measured by the mean square error.
  • the specific calculation formula is as follows:
  • FIG. 7 The simulated average results of all users in the system are shown in Fig. 7. It can be found that the four allocation schemes can slightly improve the performance as the number of base station antennas increases. Comparing the four allocation schemes, the performance of the sequential allocation scheme is the worst, and the performance of the random allocation scheme is second. The performance of the cooperative pilot allocation scheme proposed by the present disclosure is better than the former two schemes, and the observation-assisted cooperative pilot allocation is better. The program achieved the best performance.
  • Figure 8(b) is a comparison of user uplink average signal to interference and noise ratio (SINR) for four pilot allocation schemes. It is not difficult to find that the user's uplink average signal dry-to-noise ratio is greatly increased as the number of base station antennas increases. Among them, the random allocation scheme is superior to the worst sequential allocation scheme, and the two pilot allocation schemes proposed by the present disclosure have achieved good performance gains.
  • SINR user uplink average signal to interference and noise ratio
  • the large-scale fading coefficient ⁇ ijk for the channel between the kth user of the jth cell to the base station of the i th cell is generated by:
  • the uplink SRS is used in 3GPP to allow the base station to perform channel condition evaluation on the user.
  • the kth SRS sequence Basic sequence And a rotation factor ⁇ k to define:
  • the cooperative pilot allocation scheme proposed by the present disclosure needs to count the number of times that a specific pilot is multiplexed in a neighboring cell, and the SRS sequence used in each cell is related but not identical, so it is impossible to count a specific pilot.
  • the cooperative pilot allocation scheme can be modified slightly to match the specific attributes of the SRS sequence.
  • the base station performs a correlation operation on a specific SRS sequence and an SRS sequence that has been used by the neighboring cell, and uses the magnitude of the correlation as a quality indicator of the SRS sequence, so that the SRS sequence with the smallest correlation is selected and allocated to the cell.
  • the pilot selection principle of the base station of the i-th cell is as follows:
  • Si denotes a set of SRS sequences that have been used in the i-th cell
  • the SRS sequence can be directly used as the pilot sequence, and can be selected according to the previous criteria.
  • the sequence of SRS received by the base station of the i-th cell can be expressed as:
  • the alternative SRS sequences herein may be different base sequences or different shifts of the same base sequence. Even if the base sequences are the same, the shifts are different sequences.
  • the base station can estimate the inter-cell interference strength it will cause:
  • the base station of the i-th cell selects the pilot with the smallest inter-cell interference estimate from the candidate SRS sequence set, and the criteria are as follows:
  • the cooperative pilot allocation scheme and the observation-assisted cooperative pilot allocation scheme of the present disclosure can be applied to practical cases in 3GPP through minor modifications.
  • Figure 9(a) plots the simulation results of different pilot allocation schemes on channel estimation when using SRS sequences in 3GPP.
  • the average result of the simulation is shown in Fig. 9(a). It can be found that the four allocation schemes can slightly improve the performance as the number of base station antennas increases.
  • the performance difference between the sequential allocation scheme and the random allocation scheme is small, because the SRS sequences are not identical between different cells, so the performance of the sequential allocation scheme will be improved compared to the case of full multiplexing.
  • the two schemes proposed by the present disclosure are significantly better than the sequential and random allocation schemes.
  • Figure 9(b) is a comparison of user uplink average signal to interference and noise ratio (SINR) for the four pilot allocation schemes.
  • SINR user uplink average signal to interference and noise ratio
  • a method for wireless communication in a wireless communication system is described next with reference to FIG. Likewise, there are a plurality of cells in the wireless communication system, and the plurality of cells include a current cell and a neighboring cell.
  • step S710 allocation information of reference signals of the current cell and the neighboring cell is acquired.
  • step S720 the quality of the available reference signals in the current cell is determined based on the allocation information.
  • step S730 the available reference signals are assigned to the user equipment based on the quality of the available reference signals.
  • the method may further comprise: acquiring information of the used reference signal of the neighboring cell; counting the number of used reference signals highly correlated with the available reference signals in the current cell; and determining the available reference based on the result of the counting The quality of the signal.
  • the number of used reference signals that are the same as the available reference signals in the current cell can be counted.
  • the available reference signals can be ordered based on the quality of the available reference signals.
  • the method may further include: selecting a plurality of available reference signals having high quality as candidate reference signals; performing correlation operations on each of the received used reference signals and the candidate reference signals to estimate an alternative reference
  • Each of the signals is subjected to interference strength from a neighboring cell; and the candidate reference signal having the smallest interference strength is assigned to the user equipment as the available reference signal having the highest quality.
  • the method may further comprise: periodically and/or dynamically acquiring update allocation information of the reference signals of the current cell and the neighboring cells; and updating the quality of the available reference signals in the current cell based on the updated allocation information.
  • each of the plurality of cells may include a plurality of cell partitions
  • the method may further include: acquiring allocation information of reference signals of cell partitions of each of the current cell and the neighboring cells; and determining, based on the allocation information The quality of the available reference signals in the current cell partition in which the user equipment is located.
  • the method may further comprise: acquiring information of the used reference signal of the cell partition of the neighboring cell; counting the number of used reference signals highly correlated with the available reference signals in the current cell partition; and counting based The result determines the quality of the available reference signals.
  • the same referenced reference as available in the current cell partition can be used.
  • the number of signals is counted.
  • the method may further include: selecting a plurality of available reference signals having high quality in the current cell partition as candidate reference signals; performing correlation operations on each of the received used reference signals and the candidate reference signals Estimating the interference strength of each of the candidate reference signals from neighboring cells or other cell partitions of the current cell; and assigning the candidate reference signal having the lowest interference strength to the user equipment as the available reference signal having the highest quality .
  • the method may further comprise: periodically and/or dynamically acquiring update allocation information of the reference signal of the cell partition of each of the current cell and the neighboring cell; and updating the current cell partition based on the update allocation information.
  • the quality of the available reference signal may further comprise: periodically and/or dynamically acquiring update allocation information of the reference signal of the cell partition of each of the current cell and the neighboring cell; and updating the current cell partition based on the update allocation information. The quality of the available reference signal.
  • the reference signal may be an uplink reference signal
  • the uplink reference signal may comprise a pilot signal
  • the pilot signal may comprise an SRS.
  • the reference signal may be a downlink reference signal, and the downlink reference signal may include at least one of a CRS and a CSI-RS.
  • the method may further include: selecting a plurality of available downlink reference signals with high quality as the candidate downlink reference signals; acquiring a report on the used downlink reference signals from the neighboring cells received by the user equipment; And correlating each of the used downlink reference signal and the candidate downlink reference signal received by the device to perform an operation to estimate an interference strength from the neighboring cell received by each of the candidate downlink reference signals; and to have a minimum interference strength
  • the alternate downlink reference signal is assigned to the user equipment as the available downlink reference signal with the highest quality.
  • the method may further comprise: selecting a plurality of available downlink reference signals having a high quality as candidate downlink reference signals to notify the user equipment; and responsive to each of the candidate downlink reference signals received from the user equipment The information of the interference strength from the neighboring cell assigns the candidate downlink reference signal having the smallest interference strength to the user equipment as the available downlink reference signal with the highest quality.
  • the method may further comprise: determining a reporting threshold and selecting a plurality of available downlink reference signals having high quality as an alternative downlink reference signal to notify the user equipment; and responding to the neighboring candidate downlink reference signal from the user equipment
  • the candidate downlink reference signal with the minimum interference strength is allocated to the user equipment as the available downlink reference signal with the highest quality, and the candidate downlink signal with the minimum interference strength is less than the reported downlink reference signal and the expected interference level.
  • a method for wireless communication in a wireless communication system may include: receiving a used downlink reference signal from a neighboring cell; The base station of the previous cell notifies information about the received used downlink reference signal; and receives the available downlink reference signal with the highest quality from the base station of the current cell.
  • the received used downlink reference signal can be forwarded to the base station of the current cell.
  • the method may further include: receiving, by the base station of the current cell, a plurality of candidate downlink reference signals; and performing correlation operations on each of the received used downlink reference signals and the plurality of candidate downlink reference signals to estimate Each of the candidate downlink reference signals is subjected to interference strength from a neighboring cell; and information about interference strength from neighboring cells received by each of the plurality of candidate downlink reference signals is transmitted to the current cell Base station.
  • the base stations mentioned in this disclosure may be implemented as any type of evolved Node B (eNB), such as a macro eNB and a small eNB.
  • the small eNB may be an eNB covering a cell smaller than the macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB.
  • the base station can be implemented as any other type of base station, such as a NodeB and a base transceiver station (BTS).
  • BTS base transceiver station
  • the base station can include: a body (also referred to as a base station device) configured to control wireless communication; and one or more remote wireless headends (RRHs) disposed at a different location than the body.
  • a body also referred to as a base station device
  • RRHs remote wireless headends
  • various types of terminals which will be described below, can operate as a base station by performing base station functions temporarily or semi-persistently.
  • the UE mentioned in the present disclosure may be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable/encrypted dog type mobile router, and a digital camera device) or an in-vehicle terminal. (such as car navigation equipment).
  • the UE may also be implemented as a terminal (also referred to as a machine type communication (MTC) terminal) that performs machine-to-machine (M2M) communication.
  • MTC machine type communication
  • M2M machine-to-machine
  • the UE may be a wireless communication module (such as an integrated circuit module including a single chip) installed on each of the above terminals.
  • FIG. 10 is a block diagram showing a first example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied.
  • the eNB 1000 includes one or more antennas 1010 and a base station device 1020.
  • the base station device 1020 and each antenna 1010 may be connected to each other via an RF cable.
  • Each of the antennas 1010 includes a single or multiple antenna elements, such as multiple antenna elements included in a multiple input multiple output (MIMO) antenna, and is used by the base station device 1020 to transmit and receive wireless signals.
  • the eNB 1000 may include a plurality of antennas 1010.
  • multiple antennas 1010 can be compatible with multiple frequency bands used by eNB 1000.
  • Figure 10 shows An example in which the eNB 1000 includes multiple antennas 1010 is shown, but the eNB 1000 may also include a single antenna 1010.
  • the base station device 1020 includes a controller 1021, a memory 1022, a network interface 1023, and a wireless communication interface 1025.
  • the controller 1021 can be, for example, a CPU or a DSP, and operates various functions of higher layers of the base station device 1020. For example, controller 1021 generates data packets based on data in signals processed by wireless communication interface 1025 and communicates the generated packets via network interface 1023. The controller 1021 can bundle data from a plurality of baseband processors to generate bundled packets and deliver the generated bundled packets. The controller 1021 may have a logical function that performs control such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby eNBs or core network nodes.
  • the memory 1022 includes a RAM and a ROM, and stores programs executed by the controller 1021 and various types of control data such as a terminal list, transmission power data, and scheduling data.
  • Network interface 1023 is a communication interface for connecting base station device 1020 to core network 1024. Controller 1021 can communicate with a core network node or another eNB via network interface 1023. In this case, the eNB 1000 and the core network node or other eNBs may be connected to each other through a logical interface such as an S1 interface and an X2 interface. Network interface 1023 may also be a wired communication interface or a wireless communication interface for wireless backhaul lines. If network interface 1023 is a wireless communication interface, network interface 1023 can use a higher frequency band for wireless communication than the frequency band used by wireless communication interface 1025.
  • the wireless communication interface 1025 supports any cellular communication scheme, such as Long Term Evolution (LTE) and LTE-Advanced, and provides wireless connectivity to terminals located in cells of the eNB 1000 via the antenna 1010.
  • Wireless communication interface 1025 may typically include, for example, a baseband (BB) processor 1026 and RF circuitry 1027.
  • the BB processor 1026 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs layers (eg, L1, Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP)) Various types of signal processing.
  • BB processor 1026 may have some or all of the above described logic functions.
  • the BB processor 1026 may be a memory that stores a communication control program, or a module that includes a processor and associated circuitry configured to execute the program.
  • the update program can cause the functionality of the BB processor 1026 to change.
  • the module can be a card or blade that is inserted into a slot of base station device 1020. Alternatively, the module can also be a chip mounted on a card or blade.
  • the RF circuit 1027 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 1010.
  • the wireless communication interface 1025 can include a plurality of BB processors 1026.
  • multiple BB processors 1026 can be compatible with multiple frequency bands used by eNB 1000.
  • the wireless communication interface 1025 can include a plurality of RF circuits 1027.
  • multiple RF circuits 1027 can be compatible with multiple antenna elements.
  • FIG. 10 illustrates an example in which the wireless communication interface 1025 includes a plurality of BB processors 1026 and a plurality of RF circuits 1027, the wireless communication interface 1025 may also include a single BB processor 1026 or a single RF circuit 1027.
  • the eNB 11 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure may be applied.
  • the eNB 1130 includes one or more antennas 1140, a base station device 1150, and an RRH 1160.
  • the RRH 1160 and each antenna 1140 may be connected to each other via an RF cable.
  • the base station device 1150 and the RRH 1160 may be connected to each other via a high speed line such as a fiber optic cable.
  • Each of the antennas 1140 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used by the RRH 1160 to transmit and receive wireless signals.
  • the eNB 1130 may include a plurality of antennas 1140.
  • multiple antennas 1140 can be compatible with multiple frequency bands used by eNB 1130.
  • FIG. 11 illustrates an example in which the eNB 1130 includes multiple antennas 1140, the eNB 1130 may also include a single antenna 1140.
  • the base station device 1150 includes a controller 1151, a memory 1152, a network interface 1153, a wireless communication interface 1155, and a connection interface 1157.
  • the controller 1151, the memory 1152, and the network interface 1153 are the same as the controller 1021, the memory 1022, and the network interface 1023 described with reference to FIG.
  • the wireless communication interface 1155 supports any cellular communication scheme (such as LTE and LTE-Advanced) and provides wireless communication to terminals located in sectors corresponding to the RRH 1160 via the RRH 1160 and the antenna 1140.
  • Wireless communication interface 1155 can generally include, for example, BB processor 1156.
  • the BB processor 1156 is identical to the BB processor 1026 described with reference to FIG. 10 except that the BB processor 1156 is connected to the RF circuit 1164 of the RRH 1160 via the connection interface 1157.
  • the wireless communication interface 1155 can include a plurality of BB processors 1156.
  • multiple BB processors 1156 can be compatible with multiple frequency bands used by eNB 1130.
  • FIG. 11 illustrates an example in which the wireless communication interface 1155 includes a plurality of BB processors 1156, the wireless communication interface 1155 may also include a single BB processor 1156.
  • connection interface 1157 is an interface for connecting the base station device 1150 (wireless communication interface 1155) to the RRH 1160.
  • the connection interface 1157 may also be a communication module for communicating the base station device 1150 (wireless communication interface 1155) to the above-described high speed line of the RRH 1160.
  • the RRH 1160 includes a connection interface 1161 and a wireless communication interface 1163.
  • connection interface 1161 is an interface for connecting the RRH 1160 (wireless communication interface 1163) to the base station device 1150.
  • the connection interface 1161 may also be a communication module for communication in the above high speed line.
  • the wireless communication interface 1163 transmits and receives wireless signals via the antenna 1140.
  • Wireless communication interface 1163 can generally include, for example, RF circuitry 1164.
  • the RF circuit 1164 can include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 1140.
  • the wireless communication interface 1163 can include a plurality of RF circuits 1164.
  • multiple RF circuits 1164 can support multiple antenna elements.
  • FIG. 11 illustrates an example in which the wireless communication interface 1163 includes a plurality of RF circuits 1164, the wireless communication interface 1163 may also include a single RF circuit 1164.
  • the processing circuit 210 described by using FIG. 2 and the acquisition unit 211, the determination unit 212, and the allocation unit 213 therein may be used by the controller 1021 and/or the controller.
  • 1151 is implemented, and by the communication unit 220 described using FIG. 2, can be implemented by the wireless communication interface 1025 and the wireless communication interface 1155 and/or the wireless communication interface 1163.
  • controller 1021 and controller 1151 can perform a PRS reconfiguration information determining function and a DRS/PRS reconfiguration function by executing an instruction stored in a corresponding memory.
  • FIG. 12 is a block diagram showing an example of a schematic configuration of a smartphone 1200 to which the technology of the present disclosure can be applied.
  • the smart phone 1200 includes a processor 1201, a memory 1202, a storage device 1203, an external connection interface 1204, an imaging device 1206, a sensor 1207, a microphone 1208, an input device 1209, a display device 1210, a speaker 1211, a wireless communication interface 1212, and one or more An antenna switch 1215, one or more antennas 1216, a bus 1217, a battery 1218, and an auxiliary controller 1219.
  • the processor 1201 may be, for example, a CPU or a system on chip (SoC), and controls the functions of the application layer and the other layers of the smartphone 1200.
  • the memory 1202 includes a RAM and a ROM, and stores data and programs executed by the processor 1201.
  • the storage device 1203 may include a storage medium such as a semiconductor memory and a hard disk.
  • the external connection interface 1204 is an interface for connecting an external device such as a memory card and a universal serial bus (USB) device to the smartphone 1200.
  • USB universal serial bus
  • the imaging device 1206 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image.
  • Sensor 1207 can A set of sensors is included, such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor.
  • the microphone 1208 converts the sound input to the smartphone 1200 into an audio signal.
  • the input device 1209 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 1210, and receives an operation or information input from a user.
  • the display device 1210 includes screens such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smartphone 1200.
  • the speaker 1211 converts the audio signal output from the smartphone 1200 into sound.
  • the wireless communication interface 1212 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication.
  • Wireless communication interface 1212 may generally include, for example, BB processor 1213 and RF circuitry 1214.
  • the BB processor 1213 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs various types of signal processing for wireless communication.
  • the RF circuit 1214 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 1216.
  • the wireless communication interface 1212 can be a chip module on which the BB processor 1213 and the RF circuit 1214 are integrated. As shown in FIG.
  • the wireless communication interface 1212 can include a plurality of BB processors 1213 and a plurality of RF circuits 1214.
  • FIG. 12 illustrates an example in which the wireless communication interface 1212 includes a plurality of BB processors 1213 and a plurality of RF circuits 1214, the wireless communication interface 1212 may also include a single BB processor 1213 or a single RF circuit 1214.
  • wireless communication interface 1212 can support additional types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless local area network (LAN) schemes.
  • the wireless communication interface 1212 can include a BB processor 1213 and RF circuitry 1214 for each wireless communication scheme.
  • Each of the antenna switches 1215 switches the connection destination of the antenna 1216 between a plurality of circuits included in the wireless communication interface 1212, such as circuits for different wireless communication schemes.
  • Each of the antennas 1216 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used by the wireless communication interface 1212 to transmit and receive wireless signals.
  • smart phone 1200 can include multiple antennas 1216.
  • FIG. 12 illustrates an example in which smart phone 1200 includes multiple antennas 1216, smart phone 1200 may also include a single antenna 1216.
  • smart phone 1200 can include an antenna 1216 for each wireless communication scheme.
  • the antenna switch 1215 can be omitted from the configuration of the smartphone 1200.
  • the bus 1217 stores the processor 1201, the memory 1202, the storage device 1203, the external connection interface 1204, the imaging device 1206, the sensor 1207, the microphone 1208, the input device 1209, the display device 1210, the speaker 1211, the wireless communication interface 1212, and the auxiliary controller 1219 with each other. connection.
  • Battery 1218 provides power to various blocks of smart phone 1200 shown in FIG. 12 via feeders, which are partially shown as dashed lines in the figure.
  • the secondary controller 1219 operates the minimum required functions of the smartphone 1200, for example, in a sleep mode.
  • the processing circuit 610 described by using FIG. 6 and the estimating unit 611 therein may be implemented by the processor 1201 or the auxiliary controller 1219, and by using the communication unit 620 described with reference to FIG. It can be implemented by the wireless communication interface 1212. At least a portion of the functionality may also be implemented by processor 1201 or secondary controller 1219.
  • the processor 1201 or the auxiliary controller 1219 may perform a positioning measurement assistance data determination function, a positioning measurement function, and a positioning information generation function by executing an instruction stored in the memory 1202 or the storage device 1203.
  • FIG. 13 is a block diagram showing an example of a schematic configuration of a car navigation device 1320 to which the technology of the present disclosure can be applied.
  • the car navigation device 1320 includes a processor 1321, a memory 1322, a global positioning system (GPS) module 1324, a sensor 1325, a data interface 1326, a content player 1327, a storage medium interface 1328, an input device 1329, a display device 1330, a speaker 1331, and a wireless device.
  • the processor 1321 can be, for example, a CPU or SoC and controls the navigation functions and additional functions of the car navigation device 1320.
  • the memory 1322 includes a RAM and a ROM, and stores data and programs executed by the processor 1321.
  • the GPS module 1324 measures the position (such as latitude, longitude, and altitude) of the car navigation device 1320 using GPS signals received from GPS satellites.
  • Sensor 1325 can include a set of sensors, such as a gyro sensor, a geomagnetic sensor, and an air pressure sensor.
  • the data interface 1326 is connected to, for example, the in-vehicle network 1341 via a terminal not shown, and acquires data (such as vehicle speed data) generated by the vehicle.
  • the content player 1327 reproduces content stored in a storage medium such as a CD and a DVD, which is inserted into the storage medium interface 1328.
  • the input device 1329 includes, for example, a touch sensor, a button or a switch configured to detect a touch on the screen of the display device 1330, and receives an operation or information input from a user.
  • the display device 1330 includes a screen such as an LCD or OLED display, and displays an image of the navigation function or reproduced content.
  • the speaker 1331 outputs the sound of the navigation function or the reproduced content.
  • the wireless communication interface 1333 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication.
  • Wireless communication interface 1333 may generally include, for example, BB processor 1334 and RF circuitry 1335.
  • the BB processor 1334 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs various types of signal processing for wireless communication.
  • the RF circuit 1335 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 1337.
  • the wireless communication interface 1333 can also be a chip module on which the BB processor 1334 and the RF circuit 1335 are integrated. As shown in FIG.
  • the wireless communication interface 1333 may include a plurality of BB processors 1334 and a plurality of RF circuits 1335.
  • FIG. 13 illustrates an example in which the wireless communication interface 1333 includes a plurality of BB processors 1334 and a plurality of RF circuits 1335, the wireless communication interface 1333 may also include a single BB processor 1334 or a single RF circuit 1335.
  • the wireless communication interface 1333 can support another type of wireless communication scheme, such as a short-range wireless communication scheme, a near-field communication scheme, and a wireless LAN scheme.
  • the wireless communication interface 1333 may include a BB processor 1334 and an RF circuit 1335 for each wireless communication scheme.
  • Each of the antenna switches 1336 switches the connection destination of the antenna 1337 between a plurality of circuits included in the wireless communication interface 1333, such as circuits for different wireless communication schemes.
  • Each of the antennas 1337 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used by the wireless communication interface 1333 to transmit and receive wireless signals.
  • car navigation device 1320 can include a plurality of antennas 1337.
  • FIG. 13 illustrates an example in which the car navigation device 1320 includes a plurality of antennas 1337, the car navigation device 1320 may also include a single antenna 1337.
  • car navigation device 1320 can include an antenna 1337 for each wireless communication scheme.
  • the antenna switch 1336 can be omitted from the configuration of the car navigation device 1320.
  • Battery 1338 provides power to various blocks of car navigation device 1320 shown in FIG. 13 via a feeder, which is partially shown as a dashed line in the figure. Battery 1338 accumulates power supplied from the vehicle.
  • the processing circuit 610 described by using FIG. 6 and the estimating unit 611 therein can be implemented by the processor 1321, and can be wirelessly communicated by using the communication unit 620 described using FIG. Interface 1333 is implemented. At least a portion of the functionality can also be implemented by processor 1321.
  • the processor 1321 can execute the save The positioning measurement assistance data determining function, the positioning measurement function, and the positioning information generating function are executed by instructions stored in the storage 1322.
  • the technology of the present disclosure may also be implemented as an onboard system (or vehicle) 1340 that includes one or more of the car navigation device 1320, the in-vehicle network 1341, and the vehicle module 1342.
  • vehicle module 1342 generates vehicle data such as vehicle speed, engine speed, and fault information, and outputs the generated data to the in-vehicle network 1341.
  • aspects of the present disclosure can be implemented as a system, method, or device program product.
  • the various aspects of the disclosure can be in the form of an entirely hardware embodiment or a form of an embodiment comprising software, which may be collectively referred to herein as "circuit,” "unit,” or “system.”
  • aspects of the present disclosure may take the form of a device program product embodied in a device readable medium(s) having a device readable program embodied therewith. Code.
  • a storage device can be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of storage media will include the following: portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash), fiber optics, portable A compact disk read only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • a storage device is not a signal, and "non-transitory" includes all media except a signal medium.
  • the program code embodied on the storage medium may be transmitted using any suitable medium, including but not limited to wireless, wireline, optical cable, RF, etc., or any suitable combination of the foregoing.
  • Program code for performing the operations may be written in any combination of one or more programming languages or may be machine code.
  • the program code may be executed entirely on a single device, partly on a single device, as a separate software package, partly on a single device, and partly on another device, or entirely on other devices.
  • you can Connect the device through any type of connection or network including a local area network (LAN) or wide area network (WAN), or through other devices (eg, by using the Internet Service Provider's Internet), over a wireless connection such as near field communication, or
  • the connection is made by a hardwired connection (for example via a USB connection).
  • Example embodiments are described herein with reference to the accompanying drawings, FIG. It will be understood that the actions and functions can be implemented at least in part by program instructions. These program instructions may be provided to a general purpose information processing device, a dedicated information processing device, or a processor of other programmable data processing device to generate a mechanism such that the instructions executed by the processor of the device implement the specified function/action.

Landscapes

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

Abstract

本公开涉及无线通信系统中的电子设备和无线通信方法。在无线通信系统中存在多个小区，并且所述多个小区包括电子设备所在的当前小区和相邻小区。该电子设备包括：一个或多个处理电路，所述处理电路被配置为执行以下操作：获取所述当前小区和所述相邻小区的参考信号的分配信息；基于所述分配信息确定所述当前小区中的可用参考信号的质量；以及基于所述可用参考信号的质量向用户设备分配所述可用参考信号。使用根据本公开的电子设备和无线通信方法，可以通过基站间的交互信息来监测可用参考信号的质量，从而实现参考信号的优化配置并提高系统的整体性能。

Description

无线通信系统中的电子设备和无线通信方法 技术领域
本公开涉及无线通信的技术领域，具体地涉及无线通信系统中的电子设备和用于在无线通信系统中进行无线通信的方法。
背景技术
这个部分提供了与本公开有关的背景信息，这不一定是现有技术。
大规模MIMO(Multi-input Multi-output，多输入多输出)系统近年来受到了学术界与工业界的广泛关注。理论研究表明，通过采用简单的线性算法如迫零算法、最小均方误差算法等，大规模MIMO系统能够同时显著提高系统的频谱效率与能量效率，因此很有可能被下一代通信标准采纳为关键技术。
多小区时分复用情景下的大规模MIMO系统性能受限于导频污染问题。由于导频长度受限于信道相干长度，因此正交导频的个数是有限的，不同小区间不可避免地会出现导频重复利用或者导频相关的情况。此时，不同小区中采用相同或不完全正交的导频序列的用户，其发送的导频信号均会被基站接收到，而基站却无法有效区分这些导频信号，导致基站处的信道估计受到干扰。当基站使用受到干扰的信道估计进行上行数据检测时，除了会接收到本小区的用户所发送的数据外，还会接收到其他小区用户的数据，从而造成了上行链路的小区间干扰。另一方面，当基站使用受到干扰的信道估计生成预编码矩阵并发送下行数据时，除本小区用户外，其他小区的用户也会接收到数据，从而造成了下行链路的小区间干扰。
理论研究表明，虽然大规模MIMO系统的频谱效率与能量效率都能够显著提高，同时随着基站天线数的增加，噪声与信道估计误差对于系统性能的影响越来越小，但是导频污染所造成的小区间干扰却无法消除，并且成为了大规模MIMO系统的性能限制因素之一。
现有的缓解导频污染的方法往往存在以下几个问题：1、算法假设过于强，往往只有基站天线数量达到无穷的时候才能很好的满足；2、需要大量的先验信息和多小区协同合作，以巨大的其他方面的开销来获取部分性能增益；3、算法复杂度极高，在实际系统中往往很难实现。因此现有 的缓解导频污染问题的方法往往难以适应当前的技术条件，因此实际应用中，导频污染仍然是大规模MIMO系统所面临的严重问题之一。
因此，有必要提出一种新的无线通信技术方案以优化导频的配置，从而降低小区间的干扰并提升系统的整体性能。
发明内容
这个部分提供了本公开的一般概要，而不是其全部范围或其全部特征的全面披露。
本公开的目的在于提供一种无线通信系统中的电子设备和用于在无线通信系统中进行无线通信的方法，使得能够通过基站间的交互信息来监测可用导频的质量，从而实现导频的优化配置并提高系统的整体性能。
根据本公开的一方面，提供了一种无线通信系统中的电子设备，在所述无线通信系统中存在多个小区，所述多个小区包括所述电子设备所在的当前小区和相邻小区，所述电子设备包括：一个或多个处理电路，所述处理电路被配置为执行以下操作：获取所述当前小区和所述相邻小区的参考信号的分配信息；基于所述分配信息确定所述当前小区中的可用参考信号的质量；以及基于所述可用参考信号的质量向用户设备分配所述可用参考信号。
优选地，处理电路可以进一步被配置为执行以下操作：选择具有高质量的多个可用参考信号作为备选参考信号；将接收到的已用参考信号和所述备选参考信号中的每一个进行相关操作来估计所述备选参考信号中的每一个受到的来自所述相邻小区的干扰强度；以及将具有最小干扰强度的备选参考信号作为具有最高质量的可用参考信号分配给所述用户设备。
优选地，多个小区中的每一个可以包括多个小区分区，并且处理电路可以进一步被配置为执行以下操作：获取所述当前小区和所述相邻小区中的每一个的小区分区的参考信号的分配信息；以及基于所述分配信息确定所述用户设备所在的当前小区分区中的可用参考信号的质量。
优选地，处理电路还可以进一步被配置为执行以下操作：选择当前小区分区中的具有高质量的多个可用参考信号作为备选参考信号；将接收到的已用参考信号和所述备选参考信号中的每一个进行相关操作来估计所述备选参考信号中的每一个受到的来自所述相邻小区或所述当前小区的其它小区分区的干扰强度；以及将具有最小干扰强度的备选参考信号作 为具有最高质量的可用参考信号分配给所述用户设备。
根据本公开的另一方面，提供了一种无线通信系统中的用户设备，在所述无线通信系统中存在多个小区，所述多个小区包括所述用户设备所在的当前小区和相邻小区，所述用户设备包括：收发机；以及一个或多个处理电路，所述处理电路被配置为使所述收发机执行以下操作：接收来自所述相邻小区的已用下行参考信号；向所述当前小区的基站通知关于接收到的已用下行参考信号的信息；以及从所述当前小区的基站接收具有最高质量的可用下行参考信号。
根据本公开的另一方面，提供了一种一种用于在无线通信系统中进行无线通信的方法，在所述无线通信系统中存在多个小区，所述多个小区包括当前小区和相邻小区，所述方法包括：获取所述当前小区和所述相邻小区的参考信号的分配信息；基于所述分配信息确定所述当前小区中的可用参考信号的质量；以及基于所述可用参考信号的质量向用户设备分配所述可用参考信号。
根据本公开的另一方面，提供了一种用于在无线通信系统中进行无线通信的方法，在所述无线通信系统中存在多个小区，所述多个小区包括当前小区和相邻小区，所述方法包括：接收来自所述相邻小区的已用下行参考信号；向所述当前小区的基站通知关于接收到的已用下行参考信号的信息；以及从所述当前小区的基站接收具有最高质量的可用下行参考信号。
使用根据本公开的无线通信系统中的电子设备和用于在无线通信系统中进行无线通信的方法，可以通过基站之间的信息交互来共享参考信号如导频的信息并估计可用参考信号的质量，从而为新接入的用户提供最优的参考信号分配。这样一来就在不需要加长参考信号序列长度而改变现有通信设备结构的情况下，通过优化参考信号的配置，可以支持更多数量的用户设备、降低小区间的干扰，并且可以提升系统的整体性能。
从在此提供的描述中，进一步的适用性区域将会变得明显。这个概要中的描述和特定例子只是为了示意的目的，而不旨在限制本公开的范围。
附图说明
在此描述的附图只是为了所选实施例的示意的目的而非全部可能的 实施，并且不旨在限制本公开的范围。在附图中：
图1是图示多小区多用户移动蜂窝网场景的示意图；
图2是图示根据本公开的实施例的无线通信系统中的电子设备的结构的框图；
图3是图示根据本公开的实施例的无线通信系统中的电子设备中包括的确定单元的结构的框图；
图4图示根据本公开的实施例的无线通信系统中的电子设备中包括的分配单元的结构的框图；
图5是图示多小区多用户移动蜂窝网的另一场景的示意图；
图6是图示根据本公开的实施例的无线通信系统中的用户设备的结构的框图；
图7是图示根据本公开的实施例的用于在无线通信系统中进行无线通信的方法的流程图；
图8(a)是图示简单场景中不同导频分配方案在信道估计上的仿真结果的曲线图；
图8(b)是图示简单场景下不同导频分配方案的用户上行平均SINR(Signal to Interference plus Noise Ratio，信号与干扰加噪声比)比较的曲线图；
图9(a)是图示3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)中使用SRS(Sounding Reference Signal，探测参考信号)序列时不同导频分配方案在信道估计上的仿真结果的曲线图；
图9(b)是图示3GPP中使用SRS序列时不同导频分配方案的用户上行平均SINR比较的曲线图；
图10是示出适用于本公开的eNB(evolution Node Base Station，演进节点基站)的示意性配置的第一示例的框图；
图11是示出适用于本公开的eNB的示意性配置的第二示例的框图；
图12是示出适用于本公开的智能电话的示意性配置的示例的框图；以及
图13是示出适用于本公开的汽车导航设备的示意性配置的示例的框图。
虽然本公开容易经受各种修改和替换形式，但是其特定实施例已作为例子在附图中示出，并且在此详细描述。然而应当理解的是，在此对特定实施例的描述并不打算将本公开限制到公开的具体形式，而是相反地，本公开目的是要覆盖落在本公开的精神和范围之内的所有修改、等效和替换。要注意的是，贯穿几个附图，相应的标号指示相应的部件。
具体实施方式
现在参考附图来更加充分地描述本公开的例子。以下描述实质上只是示例性的，而不旨在限制本公开、应用或用途。
提供了示例实施例，以便本公开将会变得详尽，并且将会向本领域技术人员充分地传达其范围。阐述了众多的特定细节如特定部件、装置和方法的例子，以提供对本公开的实施例的详尽理解。对于本领域技术人员而言将会明显的是，不需要使用特定的细节，示例实施例可以用许多不同的形式来实施，它们都不应当被解释为限制本公开的范围。在某些示例实施例中，没有详细地描述众所周知的过程、众所周知的结构和众所周知的技术。
本公开所涉及的UE(User Equipment，用户设备)包括但不限于移动终端、计算机、车载设备等具有无线通信尤其是蜂窝通信功能的终端。进一步，本公开所涉及的UE还可以是最终产品中的关键部件如芯片。此外，本公开中所涉及的基站可以例如是eNB(evolution Node Base Station，演进节点基站)或者是eNB中的部件如芯片。
图1图示了可以应用本公开的技术方案的多小区多用户移动蜂窝网场景。如图1所示，不同的灰度代表不同的导频φ1至φk。在如图1所示的无线通信系统中存在多个小区100至160，其中小区100被规定为当前小区，而小区110、120、130、140、150和160则被规定为相邻小区。在每个小区中，三角形符号表示基站，而圆圈则表示UE。
如上面在背景技术部分中提到的那样，由于导频φ1至φk的个数是有限的，所以不同小区间不可避免地会出现导频重复利用的情况。此时，不同小区中采用相同或不完全正交的导频序列的UE，其发送的导频信号均会被基站接收到，而基站却无法有效区分这些导频信号，导致基站处的信道估计受到干扰，从而造成了上行链路和下行链路的小区间干扰。
为了解决上面提到的问题中至少之一，提出了根据本公开的技术方 案。图2示出了根据本公开的实施例的无线通信系统中的电子设备200的结构。
如图2所示，电子设备200可以包括处理电路210。需要说明的是，电子设备200既可以包括一个处理电路210，也可以包括多个处理电路210。另外，电子设备200还可以包括通信单元220等。
进一步，处理电路210可以包括各种分立的功能单元以执行各种不同的功能和/或操作。需要说明的是，这些功能单元可以是物理实体或逻辑实体，并且不同称谓的单元可能由同一个物理实体实现。
例如，如图2所示，处理电路210可以包括获取单元211、确定单元212和分配单元213。
获取单元211可以获取当前小区和相邻小区的参考信号的分配信息。
基于获取单元211获取的分配信息，确定单元212可以确定当前小区中的可用参考信号的质量。
基于确定单元212确定的可用参考信号的质量，分配单元213可以向UE分配可用参考信号。
使用根据本公开的实施例的电子设备200，可以基于当前小区中的可用参考信号的质量来向UE分配可用参考信号。这样一来，就可以将质量最好的可用参考信号分配给UE，优化了参考信号(导频)的配置，从而可以降低小区间的干扰，并且可以提升系统的整体性能。
图3示出根据本公开的实施例的无线通信系统中的电子设备中包括的确定单元300的结构。图3所示的确定单元300例如可以对应于图2所示的确定单元212(以及获取单元211)。
如图3所示，确定单元300可以包括获取单元310、计数单元320和确定单元330。
首先，获取单元310可以获取相邻小区的已用参考信号的信息。需要说明的是，在一些示例中，在无线传输上可能会产生互相干扰而地理上并不紧邻的小区亦可作为相邻小区而交互已用参考信号的信息。
接下来，计数单元320可以对与当前小区中的可用参考信号高度相关(coherent)的已用参考信号的数目进行计数。需要说明的是，可以将循环移位造成的不同的参考信号序列视为不同的参考信号，并且分配在不同时频资源上的参考信号也可以被视为不同的参考信号。
在这之后，确定单元330可以基于计数的结果确定可用参考信号的质量。
根据本公开的优选实施例，计数单元320例如可以对与当前小区中的可用参考信号相同的已用参考信号的数目进行计数。
进一步，根据本公开的实施例的无线通信系统中的电子设备(如图2所示的处理电路210)可以基于可用参考信号的质量对可用参考信号进行排序。在本公开的示例中，参考信号本身或者与其高度相关的参考信号被其他小区使用的次数越少，其可能受到的干扰越小，其对应的质量就越高，反之亦然。下文中将通过具体的示例说明相关程度的确定。
图4示出了根据本公开的实施例的无线通信系统中的电子设备中包括的分配单元400的结构。图4所示的分配单元400例如可以对应于图2所示的分配单元213。
如图4所示，分配单元400可以包括选择单元410、估计单元420和分配单元430。
首先，选择单元410可以选择具有高质量的多个可用参考信号作为备选参考信号。优选地，可以将可用参考信号按照被使用次数升序排列后选择复用次数最少的前n位作为备选参考信号。其中，所选择的具有相对高质量的可用参考信号的个数可以基于具体应用的通信系统对信道估计的精确程度要求以及相应电子设备的运算资源、时延要求等折中决定。可以理解，所选取的备用参考信号越多，则从中得到估计干扰最小的参考信号越可能接近实际情况。
接下来，估计单元420可以将接收到的已用参考信号和备选参考信号中的每一个进行相关操作，以估计备选参考信号中的每一个受到的来自相邻小区的干扰强度。
在这之后，分配单元430可以将具有最小干扰强度的备选参考信号作为具有最高质量的可用参考信号分配给用户设备。在LTE通信系统的一个具体示例中，同一个小区内的用户设备使用相同的参考信号序列(sequence),应用本公开方案的LTE基站即eNB将具有最小干扰强度的备选参考信号序列用于其服务小区内的用户设备，具体例如将该参考信号序列有关的指示信息包含于小区系统信息当中进行广播。进一步地，eNB还可以为不同的用户设备设置用于处理参考信号的不同的循环移位(即相位旋转)或者传输梳(transmission comb)，以使得同小区的用户设备之 间所使用的参考信号正交。例如eNB在系统信息中指示参考信号序列并进一步通过高层的RRC信令通知各个用户设备相应的循环移位/传输梳配置参数，以完成可用参考信号的分配。另外，eNB也可以跟邻小区协调传输梳配置参数、循环移位、传输子帧配置等。根据本公开的实施例，相同的参考信号可以定义为所占时频资源与序列都相同的参考信号，正交的参考信号可以定义为所占时频资源正交或序列正交的参考信号，而除此之外的情况则为相关的参考信号。相同的参考信号是相关的参考信号的一种极端情况。
进一步，根据本公开的实施例的无线通信系统中的电子设备中包括的处理电路(如图2所示的获取单元211)可以周期性地和/或动态地获取当前小区和相邻小区的参考信号的更新分配信息。进而，该处理电路(如图2所示的确定单元212)可以基于更新分配信息更新当前小区中的可用参考信号的质量。
另外，根据本公开的实施例，多个小区中的每一个可以包括多个小区分区，如图5所示。图5示出了多小区多用户移动蜂窝网的另一场景。[48]在图5中，各个小区被划分成多个区域(例如如图所示的扇区)，基站针对其服务的小区的每个扇区进行参考信号分配，从而使得一个小区之内的不同扇区之间能够共享相同或相关的参考信号，例如在相隔较远的扇区1和7之间可能实现共享。
具体地，例如在第0个小区(图式中间的小区)的扇区7中出现新的用户设备需要被分配参考信号，则第0小区基站接收到的参考信号中可能包含邻小区的用户设备发来的参考信号，也可能包括本小区中例如扇区1中的用户设备发来的参考信号。
此外，在如图5所示的示例中，还可以认为仅有图中虚线范围内的邻小区的扇区内的参考信号使用会对本小区造成干扰。因此，基站记录的参考信号信息例如为参考信号在相应的虚线范围内的邻小区扇区被使用，并且基站计算在虚线范围内被邻小区复用的次数以选取备选参考信号。相应地，各小区之间交互的参考信号信息可以是扇区级的。例如，各小区将记录其各个扇区的参考信号利用情况并与相邻小区交互，从而实现更精细的参考信号分配。
在如上所述的多个小区中的每一个包括多个小区分区的情况下，根据本公开的优选实施例，例如如图2所示的获取单元211可以获取当前小区 和相邻小区中的每一个的小区分区的参考信号的分配信息。进一步，确定单元212可以基于分配信息确定用户设备所在的当前小区分区中的可用参考信号的质量。
优选地，例如如图3所示的获取单元310可以获取相邻小区的小区分区的已用参考信号的信息。进一步，计数单元320可以对与当前小区分区中的可用参考信号高度相关的已用参考信号的数目进行计数。接下来，确定单元330可以基于计数的结果确定可用参考信号的质量。
根据本公开的优选实施例，计数单元320可以对与当前小区分区中的可用参考信号相同的已用参考信号的数目进行计数。
优选地，例如如图4所示的选择单元410可以选择当前小区分区中的具有高质量的多个可用参考信号作为备选参考信号。接下来，估计单元420可以将接收到的已用参考信号和备选参考信号中的每一个进行相关操作，以估计备选参考信号中的每一个受到的来自相邻小区或当前小区的其它小区分区的干扰强度。在这之后，分配单元430可以将具有最小干扰强度的备选参考信号作为具有最高质量的可用参考信号分配给用户设备。根据这个示例，同一个LTE小区内的2个用户设备可能以相同的循环移位/传输梳来传输相同的参考信号序列。
进一步，根据本公开的实施例的无线通信系统中的电子设备中包括的处理电路(如图2所示的获取单元211)可以周期性地和/或动态地获取当前小区和相邻小区中的每一个的小区分区的参考信号的更新分配信息。进而，该处理电路(如图2所示的确定单元212)可以基于更新分配信息更新当前小区分区中的可用参考信号的质量。
根据本公开的实施例，上面提到的参考信号可以是上行参考信号，该上行参考信号例如是LTE系统中的SRS(Sounding Reference Signal，探测参考信号)，或者DMRS(Demodulation Reference Signal，解调参考信号)。
根据本公开的实施例，上面提到的参考信号也可以是下行参考信号，并且该下行参考信号例如是LTE系统中的CRS(Cell-specific reference signal，小区特定参考信号)、CSI-RS(Channel State Information Reference Signal，信道状态信息参考信号)和下行解调参考信号中至少之一。
优选地，处理电路(例如如图4所示的选择单元410)可以选择具有 高质量的多个可用下行参考信号作为备选下行参考信号以通知用户设备。进一步，处理电路还可以获取关于用户设备接收到的来自相邻小区的已用下行参考信号的报告。进而，处理电路(例如如图4所示的估计单元420)可以将用户设备接收到的已用下行参考信号和备选下行参考信号中的每一个进行相关操作，以估计备选下行参考信号中的每一个受到的来自相邻小区的干扰强度。在这之后，处理电路(例如如图4所示的分配单元430)可以将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给用户设备。
另一方面，处理电路也不一定要具有估计单元的功能，而是例如可以将该功能分布于对应的用户设备侧。具体地，处理电路(例如其中的选择单元)可以选择具有高质量的多个可用下行参考信号作为备选下行参考信号以通知用户设备。接下来，响应于来自用户设备的关于备选下行参考信号中的每一个受到的来自相邻小区的估计受干扰强度的信息，处理电路(例如其中的分配单元)可以将具有最小估计受干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给用户设备。
更进一步，处理电路还可以确定上报阈值并选择具有高质量的多个可用下行参考信号作为备选下行参考信号以通知用户设备。在这之后，响应于来自用户设备的关于备选下行参考信号中邻小区预期干扰值小于上报阈值的备选下行参考信号及预期干扰水平的信息，处理电路可以将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给用户设备。
需要说明的是，根据本公开的实施例，如上所述的无线通信系统可以是LTE-A(Long Term Evolution-Advanced，高级长期演进)蜂窝通信系统，电子设备200可以是基站，并且电子设备200还可以包括诸如收发机之类的通信单元220等。通信单元220例如可以通过X2信令获取相邻小区的参考信号的分配信息。
可以理解，本公开旨在减小导频污染对通信系统造成的不利影响，因而并不限于上述的LTE系统，在例如TD-SCDMA(Time Division-Synchronous Code Division Multiple Access，时分同步码分多址)、WCDMA(Wideband Code Division Multiple Access，宽带码分多址)、WiMAX(Worldwide Interoperability for Microwave Access，全球微波互联接入)等现有或未来需要通过导频来估计信道的通信系统中本公开都将适用，而不在此一一例举。值得注意的是，在电子设备被实现为本身具有 移动性的基站(例如支持moving cell)或者支持动态开关功能的小基站的示例中，由于其所处的位置与周围无线电环境的不确定性，比起传统固化的导频设定方式，利用本公开的方案来动态地选取导频更具有可操作性并且能够达到较好的传输性能。
接下来详细地描述无线通信系统中的用户设备。图6图示了根据本公开的实施例的无线通信系统中的用户设备600的结构。同样地，在该无线通信系统中存在多个小区，所述多个小区包括用户设备600所在的当前小区和相邻小区。
如图6所示，用户设备600可以包括处理电路610。需要说明的是，用户设备600既可以包括一个处理电路610，也可以包括多个处理电路610。另外，用户设备600还可以包括诸如收发机之类的通信单元620等。
如上面提到的那样，同样地，处理电路610也可以包括各种分立的功能单元以执行各种不同的功能和/或操作。这些功能单元可以是物理实体或逻辑实体，并且不同称谓的单元可能由同一个物理实体实现。
首先，处理电路610可以使通信单元620接收来自相邻小区的已用下行参考信号。
下一步，处理电路610可以使通信单元620向当前小区的基站通知关于接收到的已用下行参考信号的信息。
在这之后，处理电路610可以使通信单元620从当前小区的基站接收具有最高质量的可用下行参考信号。
优选地，处理电路610可以使通信单元620将接收到的已用下行参考信号转发给当前小区的基站。
另一方面，处理电路610也可以对接收到的已用下行参考信号进行处理。如图6所示，处理电路610可以包括估计单元611。
具体地，处理电路610可以首先使通信单元620从当前小区的基站接收多个备选下行参考信号。
接下来，估计单元611可以将接收到的已用下行参考信号和多个备选下行参考信号中的每一个进行相关操作，以估计多个备选下行参考信号中的每一个受到的来自相邻小区的干扰强度。
在这之后，处理电路610可以使通信单元620将关于多个备选下行参考信号中的每一个受到的来自相邻小区的干扰强度的信息发送给当前小 区的基站。
上面结合附图概括地描述了根据本公开的实施例的无线通信系统中的电子设备。接下来结合具体的实施例来进一步详细地描述本公开的技术方案。
接下来的描述将参考信号称为导频。在本公开的技术方案中，首先进行导频分配信息交互。具体地，每个基站可以拥有一个导频栈来存储可用导频信息，例如存储在存储器中。各个基站的导频分配信息在相邻基站之间进行共享。例如在LTE系统中各个eNB生成包含导频分配信息的X2信令，通过X2信令承载导频分配信息以在eNB之间交互。X2信令中例如包括小区ID、已使用的导频的序号、使用的导频序列组(sequence group)的序号、组跳跃式样(group-hopping pattern)中的一个或多个关于已分配的导频的指示。
接下来进行导频质量估计。具体地，基于导频分配信息交互机制，每个基站可以对自己导频栈内的导频进行质量估计。
最后进行导频分配。例如，当新的通信设备(例如UE)进入系统时，对应的基站将从自己的导频栈中选取质量最好的导频分配给该通信设备。
这里，导频的质量可以用来描述目前场景下使用该导频将造成的小区间干扰的严重程度。
接下来举例说明多小区协同的导频质量估计方法。需注意，本公开中的多小区协同可以仅是在多小区间交互所使用的导频信息，而不一定要求各小区协作调整对导频的使用，从而以低系统复杂度实现导频的高效利用。
例如，第i个小区的基站将记录已使用导频信息如下：
Si＝{k:导频φk,i在第i个小区已被使用},i＝1,2...,L
基站之间将已使用导频信息进行交互共享，其中L表示总的小区数量，φk,i表示第i小区中序号为k的以行向量表示的导频序列，
Figure PCTCN2016081850-appb-000001
为未被使用导频集合。
接下来，第i个小区的基站将计算与
Figure PCTCN2016081850-appb-000002
中的导频高度相关的导频在相邻小区被使用的次数如下：
Figure PCTCN2016081850-appb-000003
其中参数δi定义为区别φk',j与φk,i相关度高低的阈值，其取值范围为0≤δi≤|φk,jφk,j H|2，对于集合A的操作|A|为在集合A中元素的个数，对于复数x的|x|的操作为取x的绝对值，xH为向量x的共轭转置。
在这之后，第i个小区根据Ci,k进行排序形成本小区的可用导频栈，优先分配Ci,k值小的。
接下来举例说明观测辅助的协同导频质量估计方法。
首先，基于导频信息交互，第i个小区的基站将拥有n个质量较高的备选导频，组成一个备选集合(导频栈)如下：
Ωi＝{k1,i,k2,i,...,kn,i}
接下来，第i个小区的基站将接收到的上行导频序列和这几个备选导频进行相关操作，来估计使用该导频将引入的干扰强度，具体计算如下：
Figure PCTCN2016081850-appb-000004
其中，
Figure PCTCN2016081850-appb-000005
表示第i个小区的基站接收到的上行导频信号，例如可以是其他小区用户发出的上行导频信号，也可以包括自己小区已分配上行导频的用户发出的上行导频信号。后一种情况适用于各个小区被划分成多个区域(例如如图5所示的扇区)。
在这之后，基站可以根据估计结果对备选导频进行排序，选取例如最优的分配给新用户，具体准则例如可以如下：
Figure PCTCN2016081850-appb-000006
根据本公开的实施例，当一个新通信设备进入系统时，它将向相应的基站发送导频分配请求。基站确认该通信设备后，将从导频栈中选取质量最好的导频分配给该通信设备。
根据本公开的另一实施例，当某个通信设备的服务质量恶化时，它将发送请求给相应的基站请求更换质量更好的导频。对应的基站接收请求 后，将从导频栈中选取当前质量最好的导频更换给该通信设备。替选地，基站根据通信设备的导频估计上行信道并根据估计结果进行上行数据收取，在基站发现上行数据接收质量恶化的情况下，也可以主动为通信设备更换质量更好的导频。
根据本公开的实施例，当一个通信设备离开或者更换成新的导频后，被弃用的导频将被回收。基站将对回收的导频进行单独质量估计，然后插入到导频栈中。
根据本公开的实施例，系统中的通信设备具有不同的优先等级，基站将质量较好的导频分配/预留给优先级高的通信设备，将质量一般或较差的导频分配给优先级低的通信设备。
根据本公开的实施例，可以对导频质量进行固定间隔更新。例如，系统可以定义一个固定的间隔，所有的基站可以按照固定的时间间隔对导频栈中的导频进行质量估计。
另一方面，也可以对导频质量进行动态更新。例如，只有当一些特定事件发生时，基站才会更新导频栈中的导频质量，比如新用户加入、导频更替、导频回收等。否则的话，导频质量沿用上一个时间段的信息。
当然，也可以采用混合机制，亦即导频质量即有固定间隔更新，也有动态更新。
接下来以如图1所示的简单的多小区多用户移动蜂窝网场景为例来详细地描述本公开的技术方案。
具体地，基本参数设置如下：1)小区个数L＝7；2)每个小区内的最大用户数Kmax＝10(即总的正交导频个数)；3)每个小区的瞬时用户数服从分布Ki：u[1,Kmax]；4)小区半径R＝500m；5)小区边缘用户信噪比SNR＝20dB；6)传播路径损耗指数α＝2；7)对数分布的阴影衰落系数σshadow＝8dB。用户信道的大尺度衰落系数β由传播路径损耗和阴影衰落效应来生成，每次试验中用户的位置都是随机生成的。
图8(a)绘制了不同导频分配方案在信道估计上的仿真结果。总共有四种导频分配方案：1)顺序分配方案：按照导频序列的下标依次分配给接入的用户；2)随机分配方案：从可用导频中随机选取分配给接入的用户；3)协同导频分配方案：通过统计导频在周围小区的使用情况来进行协同导频分配；4)观测辅助的协同导频分配方案：对协同导频分配方案提供的几个质量较好的导频进行小区间干扰强度估计，从中选取最优的 导频。信道估计的性能用均方误差来衡量，具体计算公式如下：
Figure PCTCN2016081850-appb-000007
其中
Figure PCTCN2016081850-appb-000008
表示信道估计的结果。系统内所有用户的仿真平均结果如图7所示，可以发现四种分配方案都能随着基站天线数的增加稍微改善性能。四种分配方案相互比较可发现顺序分配方案的性能最差，随机分配方案的性能次之，本公开提出的协同导频分配方案性能比前两种方案都要好，而观测辅助的协同导频分配方案取得了最好的性能。图8(b)为四种导频分配方案的用户上行平均信干噪比(SINR)的比较。不难发现，用户上行平均信干噪比随着基站天线数的增加而大大提高。其中，随机分配方案优于最差的顺序分配方案，而本公开提出的两种导频分配方案都取得了不错的性能增益。
接下来给出一个基于3GPP TS 36.211的仿真的例子。在这个具体的示例中，考虑了一个更复杂更实际的多小区多用户的移动蜂窝网系统，系统的具体参数如下表所示：
表1仿真具体参数
总的小区个数L L＝7
基站的天线数M 8≤M≤256
小区内最大用户数Kmax Kmax＝8
小区半径R R＝500m
小区边缘信噪比SNR 20dB
用户平均发射能量 0dB
基站平均发射能量 10dB
路径损耗指数α α＝2
对数分布的阴影衰落σshadow σshadow＝8dB
对于第j个小区中的第k个用户到第i个小区的基站之间信道的大尺度衰落系数βijk由下式生成：
Figure PCTCN2016081850-appb-000009
其中，zijk表示阴影衰落效应系数，服从标准差σshadow＝8dB的对数分布(10log10(zijk)服从0均值、标准差为σshadow的高斯分布)，rijk表示第j个小区中的第k个用户到第i个小区的基站之间的距离。在每一次仿真中，用户的位置都是随机产生的，可以假设每个小区的用户数量服从均匀分布即Ki：u[1,Kmax]，且每个用户都是依次接入系统。
3GPP中使用上行SRS让基站对用户进行信道状况评估。这里采用SRS序列长度N＝24。对于第i个小区来说，第k个SRS序列
Figure PCTCN2016081850-appb-000010
由一个基础序列
Figure PCTCN2016081850-appb-000011
和一个旋转因子αk来定义：
Figure PCTCN2016081850-appb-000012
其中可以设置
Figure PCTCN2016081850-appb-000013
基础序列
Figure PCTCN2016081850-appb-000014
由下式给出：
Figure PCTCN2016081850-appb-000015
其中
Figure PCTCN2016081850-appb-000016
的值由TS 36.211中的表5.5.1.2-2给出。本领域技术人员可以意识到的是，在同一个小区内使用的SRS序列之间是相互正交的，而不同小区虽然使用不同的SRS序列组，但并不是相互正交的，而是相关的。
对于本公开提出的协同导频分配方案需要统计特定导频在相邻小区被复用的次数，而SRS序列每个小区使用的虽然相关，但并不完全相同，因此无法统计某个特定导频的复用次数。可以对于协同导频分配方案稍加修改来匹配SRS序列的特定属性。具体而言，基站将把某个特定的SRS序列和邻小区已经使用的SRS序列进行相关操作，将相关度的大小作为该SRS序列的质量指标，从而选取相关度最小的SRS序列分配给本小区的用户。数学上来说，第i个小区的基站的导频选取原则如下：
Figure PCTCN2016081850-appb-000017
这里Si表示在第i个小区内已使用的SRS序列的集合，
Figure PCTCN2016081850-appb-000018
表示在第 i个小区内未使用的SRS序列的集合。
对于观测辅助的协同导频分配方案则可直接将SRS序列作为导频序列，依照前面的准则进行选取即可。第i个小区的基站接收到的SRS序列可以表示为：
Figure PCTCN2016081850-appb-000019
第i个小区的基站通过协同导频分配方案可获得几个备选SRS序列集合Ωi＝{k1,i,k2,i,...,kn,i}。需要说明的是，这里的备选SRS序列既可以是不同的基序列，也可以是同一基序列的不同移位。即使基序列相同，移位后也是不同的序列。对于集合中特定的一个SRS序列，基站可以对其将造成的小区间干扰强度进行估计：
Figure PCTCN2016081850-appb-000020
这里应用了同一小区内使用的导频相互正交的性质，即
Figure PCTCN2016081850-appb-000021
基于此，第i个小区的基站从备选SRS序列集中选取小区间干扰估计最小的导频，准则如下：
Figure PCTCN2016081850-appb-000022
如上所述，可以将本公开的协同导频分配方案和观测辅助的协同导频分配方案通过细微的改动应用于3GPP中的实际案例之中。
图9(a)绘制了3GPP中使用SRS序列时不同导频分配方案在信道估计上的仿真结果。总共有四种导频分配方案：1)顺序分配方案；2)随机分配方案；3)协同导频分配方案；4)观测辅助的协同导频分配方案。仿真的平均结果如图9(a)所示，可以发现四种分配方案都能随着基站天线数的增加稍微改善性能。其中顺序分配方案和随机分配方案性能差距很小，因为SRS序列不同小区之间不完全相同，因此顺序分配方案的性能将比完全复用的情况得到了改善。本公开提出的两种方案则明显好于顺序和随机分配方案。图9(b)为四种导频分配方案的用户上行平均信干噪比(SINR)的比较。如从图中看到的那样，用户上行平均信干噪比随着基站天线数而大大提高。其中，随机分配方案优于最差的顺序分配方案，而本公开提出的两种导频分配方案都取得了不错的性能增益。
接下来参考图7来描述根据本公开的实施例的用于在无线通信系统中进行无线通信的方法。同样地，在所述无线通信系统中存在多个小区，并且所述多个小区包括当前小区和相邻小区。
如图7所示，在步骤S710中，获取当前小区和相邻小区的参考信号的分配信息。
然后，在步骤S720中，基于分配信息确定当前小区中的可用参考信号的质量。
最后，在步骤S730中，基于可用参考信号的质量向用户设备分配可用参考信号。
优选地，该方法还可以包括：获取相邻小区的已用参考信号的信息；对与当前小区中的可用参考信号高度相关的已用参考信号的数目进行计数；以及基于计数的结果确定可用参考信号的质量。
优选地，可以对与当前小区中的可用参考信号相同的已用参考信号的数目进行计数。
优选地，可以基于可用参考信号的质量对可用参考信号进行排序。
优选地，该方法还可以包括：选择具有高质量的多个可用参考信号作为备选参考信号；将接收到的已用参考信号和备选参考信号中的每一个进行相关操作来估计备选参考信号中的每一个受到的来自相邻小区的干扰强度；以及将具有最小干扰强度的备选参考信号作为具有最高质量的可用参考信号分配给用户设备。
优选地，该方法还可以包括：周期性地和/或动态地获取当前小区和相邻小区的参考信号的更新分配信息；以及基于更新分配信息更新当前小区中的可用参考信号的质量。
优选地，多个小区中的每一个可以包括多个小区分区，并且该方法还可以包括：获取当前小区和相邻小区中的每一个的小区分区的参考信号的分配信息；以及基于分配信息确定用户设备所在的当前小区分区中的可用参考信号的质量。
优选地，该方法还可以包括：获取相邻小区的小区分区的已用参考信号的信息；对与当前小区分区中的可用参考信号高度相关的已用参考信号的数目进行计数；以及基于计数的结果确定可用参考信号的质量。
优选地，可以对与当前小区分区中的可用参考信号相同的已用参考 信号的数目进行计数。
优选地，该方法还可以包括：选择当前小区分区中的具有高质量的多个可用参考信号作为备选参考信号；将接收到的已用参考信号和备选参考信号中的每一个进行相关操作来估计备选参考信号中的每一个受到的来自相邻小区或当前小区的其它小区分区的干扰强度；以及将具有最小干扰强度的备选参考信号作为具有最高质量的可用参考信号分配给用户设备。
优选地，该方法还可以包括：周期性地和/或动态地获取当前小区和相邻小区中的每一个的小区分区的参考信号的更新分配信息；以及基于更新分配信息更新当前小区分区中的可用参考信号的质量。
优选地，参考信号可以为上行参考信号，所述上行参考信号可以包括导频信号，并且所述导频信号可以包括SRS。
优选地，参考信号可以为下行参考信号，并且所述下行参考信号可以包括CRS和CSI-RS中至少之一。
优选地，该方法还可以包括：选择具有高质量的多个可用下行参考信号作为备选下行参考信号；获取关于用户设备接收到的来自相邻小区的已用下行参考信号的报告；将该用户设备接收到的已用下行参考信号和备选下行参考信号中的每一个进行相关操作来估计备选下行参考信号中的每一个受到的来自相邻小区的干扰强度；以及将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给用户设备。
优选地，该方法还可以包括：选择具有高质量的多个可用下行参考信号作为备选下行参考信号以通知用户设备；以及响应于来自用户设备的关于备选下行参考信号中的每一个受到的来自相邻小区的干扰强度的信息，将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给用户设备。
优选地，该方法还可以包括：确定上报阈值并选择具有高质量的多个可用下行参考信号作为备选下行参考信号以通知用户设备；以及响应于来自用户设备的关于备选下行参考信号中邻小区预期干扰值小于上报阈值的备选下行参考信号及预期干扰水平的信息，将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给用户设备。
另一方面，根据本公开的另一实施例的用于在无线通信系统中进行无线通信的方法可以包括：接收来自相邻小区的已用下行参考信号；向当 前小区的基站通知关于接收到的已用下行参考信号的信息；以及从当前小区的基站接收具有最高质量的可用下行参考信号。
优选地，可以将接收到的已用下行参考信号转发给当前小区的基站。
优选地，该方法还可以包括：从当前小区的基站接收多个备选下行参考信号；将接收到的已用下行参考信号和多个备选下行参考信号中的每一个进行相关操作来估计多个备选下行参考信号中的每一个受到的来自相邻小区的干扰强度；以及将关于多个备选下行参考信号中的每一个受到的来自相邻小区的干扰强度的信息发送给当前小区的基站。
根据本公开的实施例的用于在无线通信系统中进行无线通信的方法的上述各个步骤的各种具体实施方式前面已经作过详细描述，在此不再重复说明。
本公开的技术能够应用于各种产品。例如，本公开中提到的基站可以被实现为任何类型的演进型节点B(eNB)，诸如宏eNB和小eNB。小eNB可以为覆盖比宏小区小的小区的eNB，诸如微微eNB、微eNB和家庭(毫微微)eNB。代替地，基站可以被实现为任何其他类型的基站，诸如NodeB和基站收发台(BTS)。基站可以包括：被配置为控制无线通信的主体(也称为基站设备)；以及设置在与主体不同的地方的一个或多个远程无线头端(RRH)。另外，下面将描述的各种类型的终端均可以通过暂时地或半持久性地执行基站功能而作为基站工作。
例如，本公开中提到的UE可以被实现为移动终端(诸如智能电话、平板个人计算机(PC)、笔记本式PC、便携式游戏终端、便携式/加密狗型移动路由器和数字摄像装置)或者车载终端(诸如汽车导航设备)。UE还可以被实现为执行机器对机器(M2M)通信的终端(也称为机器类型通信(MTC)终端)。此外，UE可以为安装在上述终端中的每个终端上的无线通信模块(诸如包括单个晶片的集成电路模块)。
图10是示出可以应用本公开的技术的eNB的示意性配置的第一示例的框图。eNB 1000包括一个或多个天线1010以及基站设备1020。基站设备1020和每个天线1010可以经由RF线缆彼此连接。
天线1010中的每一个均包括单个或多个天线元件(诸如包括在多输入多输出(MIMO)天线中的多个天线元件)，并且用于基站设备1020发送和接收无线信号。如图10所示，eNB 1000可以包括多个天线1010。例如，多个天线1010可以与eNB 1000使用的多个频带兼容。虽然图10示 出其中eNB 1000包括多个天线1010的示例，但是eNB 1000也可以包括单个天线1010。
基站设备1020包括控制器1021、存储器1022、网络接口1023以及无线通信接口1025。
控制器1021可以为例如CPU或DSP，并且操作基站设备1020的较高层的各种功能。例如，控制器1021根据由无线通信接口1025处理的信号中的数据来生成数据分组，并经由网络接口1023来传递所生成的分组。控制器1021可以对来自多个基带处理器的数据进行捆绑以生成捆绑分组，并传递所生成的捆绑分组。控制器1021可以具有执行如下控制的逻辑功能：该控制诸如为无线资源控制、无线承载控制、移动性管理、接纳控制和调度。该控制可以结合附近的eNB或核心网节点来执行。存储器1022包括RAM和ROM，并且存储由控制器1021执行的程序和各种类型的控制数据(诸如终端列表、传输功率数据以及调度数据)。
网络接口1023为用于将基站设备1020连接至核心网1024的通信接口。控制器1021可以经由网络接口1023而与核心网节点或另外的eNB进行通信。在此情况下，eNB 1000与核心网节点或其他eNB可以通过逻辑接口(诸如S1接口和X2接口)而彼此连接。网络接口1023还可以为有线通信接口或用于无线回程线路的无线通信接口。如果网络接口1023为无线通信接口，则与由无线通信接口1025使用的频带相比，网络接口1023可以使用较高频带用于无线通信。
无线通信接口1025支持任何蜂窝通信方案(诸如长期演进(LTE)和LTE-先进)，并且经由天线1010来提供到位于eNB 1000的小区中的终端的无线连接。无线通信接口1025通常可以包括例如基带(BB)处理器1026和RF电路1027。BB处理器1026可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行层(例如L1、介质访问控制(MAC)、无线链路控制(RLC)和分组数据汇聚协议(PDCP))的各种类型的信号处理。代替控制器1021，BB处理器1026可以具有上述逻辑功能的一部分或全部。BB处理器1026可以为存储通信控制程序的存储器，或者为包括被配置为执行程序的处理器和相关电路的模块。更新程序可以使BB处理器1026的功能改变。该模块可以为插入到基站设备1020的槽中的卡或刀片。可替代地，该模块也可以为安装在卡或刀片上的芯片。同时，RF电路1027可以包括例如混频器、滤波器和放大器，并且经由天线1010来传送和接收无线信号。
如图10所示，无线通信接口1025可以包括多个BB处理器1026。例如，多个BB处理器1026可以与eNB 1000使用的多个频带兼容。如图10所示，无线通信接口1025可以包括多个RF电路1027。例如，多个RF电路1027可以与多个天线元件兼容。虽然图10示出其中无线通信接口1025包括多个BB处理器1026和多个RF电路1027的示例，但是无线通信接口1025也可以包括单个BB处理器1026或单个RF电路1027。
图11是示出可以应用本公开的技术的eNB的示意性配置的第二示例的框图。eNB 1130包括一个或多个天线1140、基站设备1150和RRH1160。RRH 1160和每个天线1140可以经由RF线缆而彼此连接。基站设备1150和RRH 1160可以经由诸如光纤线缆的高速线路而彼此连接。
天线1140中的每一个均包括单个或多个天线元件(诸如包括在MIMO天线中的多个天线元件)并且用于RRH 1160发送和接收无线信号。如图11所示，eNB 1130可以包括多个天线1140。例如，多个天线1140可以与eNB 1130使用的多个频带兼容。虽然图11示出其中eNB 1130包括多个天线1140的示例，但是eNB 1130也可以包括单个天线1140。
基站设备1150包括控制器1151、存储器1152、网络接口1153、无线通信接口1155以及连接接口1157。控制器1151、存储器1152和网络接口1153与参照图10描述的控制器1021、存储器1022和网络接口1023相同。
无线通信接口1155支持任何蜂窝通信方案(诸如LTE和LTE-先进)，并且经由RRH 1160和天线1140来提供到位于与RRH 1160对应的扇区中的终端的无线通信。无线通信接口1155通常可以包括例如BB处理器1156。除了BB处理器1156经由连接接口1157连接到RRH 1160的RF电路1164之外，BB处理器1156与参照图10描述的BB处理器1026相同。如图11所示，无线通信接口1155可以包括多个BB处理器1156。例如，多个BB处理器1156可以与eNB 1130使用的多个频带兼容。虽然图11示出其中无线通信接口1155包括多个BB处理器1156的示例，但是无线通信接口1155也可以包括单个BB处理器1156。
连接接口1157为用于将基站设备1150(无线通信接口1155)连接至RRH 1160的接口。连接接口1157还可以为用于将基站设备1150(无线通信接口1155)连接至RRH 1160的上述高速线路中的通信的通信模块。
RRH 1160包括连接接口1161和无线通信接口1163。
连接接口1161为用于将RRH 1160(无线通信接口1163)连接至基站设备1150的接口。连接接口1161还可以为用于上述高速线路中的通信的通信模块。
无线通信接口1163经由天线1140来传送和接收无线信号。无线通信接口1163通常可以包括例如RF电路1164。RF电路1164可以包括例如混频器、滤波器和放大器，并且经由天线1140来传送和接收无线信号。如图11所示，无线通信接口1163可以包括多个RF电路1164。例如，多个RF电路1164可以支持多个天线元件。虽然图11示出其中无线通信接口1163包括多个RF电路1164的示例，但是无线通信接口1163也可以包括单个RF电路1164。
在图10和图11所示的eNB 1000和eNB 1130中，通过使用图2所描述的处理电路210以及其中的获取单元211、确定单元212和分配单元213可以由控制器1021和/或控制器1151实现，并且通过使用图2所描述的通信单元220可以由无线通信接口1025以及无线通信接口1155和/或无线通信接口1163实现。功能的至少一部分也可以由控制器1021和控制器1151实现。例如，控制器1021和/或控制器1151可以通过执行相应的存储器中存储的指令而执行PRS重新配置信息确定功能和DRS/PRS重新配置功能。
图12是示出可以应用本公开的技术的智能电话1200的示意性配置的示例的框图。智能电话1200包括处理器1201、存储器1202、存储装置1203、外部连接接口1204、摄像装置1206、传感器1207、麦克风1208、输入装置1209、显示装置1210、扬声器1211、无线通信接口1212、一个或多个天线开关1215、一个或多个天线1216、总线1217、电池1218以及辅助控制器1219。
处理器1201可以为例如CPU或片上系统(SoC)，并且控制智能电话1200的应用层和另外层的功能。存储器1202包括RAM和ROM，并且存储数据和由处理器1201执行的程序。存储装置1203可以包括存储介质，诸如半导体存储器和硬盘。外部连接接口1204为用于将外部装置(诸如存储卡和通用串行总线(USB)装置)连接至智能电话1200的接口。
摄像装置1206包括图像传感器(诸如电荷耦合器件(CCD)和互补金属氧化物半导体(CMOS))，并且生成捕获图像。传感器1207可以 包括一组传感器，诸如测量传感器、陀螺仪传感器、地磁传感器和加速度传感器。麦克风1208将输入到智能电话1200的声音转换为音频信号。输入装置1209包括例如被配置为检测显示装置1210的屏幕上的触摸的触摸传感器、小键盘、键盘、按钮或开关，并且接收从用户输入的操作或信息。显示装置1210包括屏幕(诸如液晶显示器(LCD)和有机发光二极管(OLED)显示器)，并且显示智能电话1200的输出图像。扬声器1211将从智能电话1200输出的音频信号转换为声音。
无线通信接口1212支持任何蜂窝通信方案(诸如LTE和LTE-先进)，并且执行无线通信。无线通信接口1212通常可以包括例如BB处理器1213和RF电路1214。BB处理器1213可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行用于无线通信的各种类型的信号处理。同时，RF电路1214可以包括例如混频器、滤波器和放大器，并且经由天线1216来传送和接收无线信号。无线通信接口1212可以为其上集成有BB处理器1213和RF电路1214的一个芯片模块。如图12所示，无线通信接口1212可以包括多个BB处理器1213和多个RF电路1214。虽然图12示出其中无线通信接口1212包括多个BB处理器1213和多个RF电路1214的示例，但是无线通信接口1212也可以包括单个BB处理器1213或单个RF电路1214。
此外，除了蜂窝通信方案之外，无线通信接口1212可以支持另外类型的无线通信方案，诸如短距离无线通信方案、近场通信方案和无线局域网(LAN)方案。在此情况下，无线通信接口1212可以包括针对每种无线通信方案的BB处理器1213和RF电路1214。
天线开关1215中的每一个在包括在无线通信接口1212中的多个电路(例如用于不同的无线通信方案的电路)之间切换天线1216的连接目的地。
天线1216中的每一个均包括单个或多个天线元件(诸如包括在MIMO天线中的多个天线元件)，并且用于无线通信接口1212传送和接收无线信号。如图12所示，智能电话1200可以包括多个天线1216。虽然图12示出其中智能电话1200包括多个天线1216的示例，但是智能电话1200也可以包括单个天线1216。
此外，智能电话1200可以包括针对每种无线通信方案的天线1216。在此情况下，天线开关1215可以从智能电话1200的配置中省略。
总线1217将处理器1201、存储器1202、存储装置1203、外部连接接口1204、摄像装置1206、传感器1207、麦克风1208、输入装置1209、显示装置1210、扬声器1211、无线通信接口1212以及辅助控制器1219彼此连接。电池1218经由馈线向图12所示的智能电话1200的各个块提供电力，馈线在图中被部分地示为虚线。辅助控制器1219例如在睡眠模式下操作智能电话1200的最小必需功能。
在图12所示的智能电话1200中，通过使用图6所描述的处理电路610以及其中的估计单元611可以由处理器1201或辅助控制器1219实现，并且通过使用图6所描述的通信单元620可以由无线通信接口1212实现。功能的至少一部分也可以由处理器1201或辅助控制器1219实现。例如，处理器1201或辅助控制器1219可以通过执行存储器1202或存储装置1203中存储的指令而执行定位测量辅助数据确定功能、定位测量功能和定位信息生成功能。
图13是示出可以应用本公开的技术的汽车导航设备1320的示意性配置的示例的框图。汽车导航设备1320包括处理器1321、存储器1322、全球定位系统(GPS)模块1324、传感器1325、数据接口1326、内容播放器1327、存储介质接口1328、输入装置1329、显示装置1330、扬声器1331、无线通信接口1333、一个或多个天线开关1336、一个或多个天线1337以及电池1338。
处理器1321可以为例如CPU或SoC，并且控制汽车导航设备1320的导航功能和另外的功能。存储器1322包括RAM和ROM，并且存储数据和由处理器1321执行的程序。
GPS模块1324使用从GPS卫星接收的GPS信号来测量汽车导航设备1320的位置(诸如纬度、经度和高度)。传感器1325可以包括一组传感器，诸如陀螺仪传感器、地磁传感器和空气压力传感器。数据接口1326经由未示出的终端而连接到例如车载网络1341，并且获取由车辆生成的数据(诸如车速数据)。
内容播放器1327再现存储在存储介质(诸如CD和DVD)中的内容，该存储介质被插入到存储介质接口1328中。输入装置1329包括例如被配置为检测显示装置1330的屏幕上的触摸的触摸传感器、按钮或开关，并且接收从用户输入的操作或信息。显示装置1330包括诸如LCD或OLED显示器的屏幕，并且显示导航功能的图像或再现的内容。扬声器1331输出导航功能的声音或再现的内容。
无线通信接口1333支持任何蜂窝通信方案(诸如LTE和LTE-先进)，并且执行无线通信。无线通信接口1333通常可以包括例如BB处理器1334和RF电路1335。BB处理器1334可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行用于无线通信的各种类型的信号处理。同时，RF电路1335可以包括例如混频器、滤波器和放大器，并且经由天线1337来传送和接收无线信号。无线通信接口1333还可以为其上集成有BB处理器1334和RF电路1335的一个芯片模块。如图13所示，无线通信接口1333可以包括多个BB处理器1334和多个RF电路1335。虽然图13示出其中无线通信接口1333包括多个BB处理器1334和多个RF电路1335的示例，但是无线通信接口1333也可以包括单个BB处理器1334或单个RF电路1335。
此外，除了蜂窝通信方案之外，无线通信接口1333可以支持另外类型的无线通信方案，诸如短距离无线通信方案、近场通信方案和无线LAN方案。在此情况下，针对每种无线通信方案，无线通信接口1333可以包括BB处理器1334和RF电路1335。
天线开关1336中的每一个在包括在无线通信接口1333中的多个电路(诸如用于不同的无线通信方案的电路)之间切换天线1337的连接目的地。
天线1337中的每一个均包括单个或多个天线元件(诸如包括在MIMO天线中的多个天线元件)，并且用于无线通信接口1333传送和接收无线信号。如图13所示，汽车导航设备1320可以包括多个天线1337。虽然图13示出其中汽车导航设备1320包括多个天线1337的示例，但是汽车导航设备1320也可以包括单个天线1337。
此外，汽车导航设备1320可以包括针对每种无线通信方案的天线1337。在此情况下，天线开关1336可以从汽车导航设备1320的配置中省略。
电池1338经由馈线向图13所示的汽车导航设备1320的各个块提供电力，馈线在图中被部分地示为虚线。电池1338累积从车辆提供的电力。
在图13示出的汽车导航设备1320中，通过使用图6所描述的处理电路610以及其中的估计单元611可以由处理器1321实现，并且通过使用图6所描述的通信单元620可以由无线通信接口1333实现。功能的至少一部分也可以由处理器1321实现。例如，处理器1321可以通过执行存 储器1322中存储的指令而执行定位测量辅助数据确定功能、定位测量功能和定位信息生成功能。
本公开的技术也可以被实现为包括汽车导航设备1320、车载网络1341以及车辆模块1342中的一个或多个块的车载系统(或车辆)1340。车辆模块1342生成车辆数据(诸如车速、发动机速度和故障信息)，并且将所生成的数据输出至车载网络1341。
在本公开的系统和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
如本领域的技术人员将意识到的那样，本公开的各个方面可以实施为系统、方法或装置程序产品。因此，本公开的各个方面可以采用完全硬件实施方式的形式或采用包括软件的实施方式的形式，所述软件在本文中可以全部统称为“电路”、“单元”或“系统”。进而，本公开的各个方面可以采用在(一个或多个)装置可读介质中实施的装置程序产品的形式，所述(一个或多个)装置可读介质具有与之实施的装置可读程序代码。
应当注意的是，可以使用存储在装置可读存储介质如非信号存储装置上的、由处理器执行的指令来实现本文中所描述的各种功能。存储装置可以是如电子的、磁的、光学的、电磁的、红外的或半导体系统、设备或装置，或前述的任何适当的组合。存储介质的更多的具体示例将包括如下：便携式计算机磁盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦除可编程只读存储器(EPROM或闪存)、光纤、便携式光盘只读存储器(CD-ROM)、光学存储装置、磁存储装置，或前述的任何适当的组合。在本文的上下文中，存储装置不是信号，并且“非暂态”包括除信号介质之外的全部介质。
可以使用任何适当的介质，包括但不限于无线、有线、光缆、RF等，或前述的任何适当的组合，来传输在存储介质上所包含的程序代码。
用于执行操作的程序代码可以以一种或多种编程语言的任何组合来编写，或者可以是机器代码。程序代码可以完全在单个装置上执行、部分地在单个装置上执行、作为独立软件包执行、部分地在单个装置上以及部分地在另一装置上执行，或完全在其它装置上执行。在某些情况下，可以 通过任何类型的连接或网络(包括局域网(LAN)或广域网(WAN))来对装置进行连接，或可以通过其它装置(例如通过使用因特网服务提供商的因特网)、通过无线连接如近场通信或通过硬线连接(例如通过USB连接)来进行连接。
本文参考图示了根据各种示例实施方式的示例方法、装置和程序产品的附图来描述示例实施方式。将要理解的是，动作和功能可以至少部分地由程序指令来实现。可以将这些程序指令提供给通用信息处理装置、专用信息处理装置或其它可编程数据处理装置的处理器以产生机制，使得经由装置的处理器执行的指令实现指定的功能/动作。
值得注意的是，虽然在附图中使用了特定的块，并且已经图示了块的特定顺序，但这些都是非限制性的示例。由于明确说明的示例仅用于描述的目的，而不应被解释为限制，所以在某些情况下，可以合并两个或多个模块，可以将块分成两个或多个块，或者可以酌情将某些块重新排序或重新组织。
以上虽然结合附图详细描述了本公开的实施例，但是应当明白，上面所描述的实施方式只是用于说明本公开，而并不构成对本公开的限制。对于本领域的技术人员来说，可以对上述实施方式作出各种修改和变更而没有背离本公开的实质和范围。因此，本公开的范围仅由所附的权利要求及其等效含义来限定。

Claims (22)

  1. 一种无线通信系统中的电子设备，在所述无线通信系统中存在多个小区，所述多个小区包括所述电子设备所在的当前小区和相邻小区，所述电子设备包括：
    一个或多个处理电路，所述处理电路被配置为执行以下操作：
    获取所述当前小区和所述相邻小区的参考信号的分配信息；
    基于所述分配信息确定所述当前小区中的可用参考信号的质量；以及
    基于所述可用参考信号的质量向用户设备分配所述可用参考信号。
  2. 根据权利要求1所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    获取所述相邻小区的已用参考信号的信息；
    对与所述当前小区中的可用参考信号高度相关的已用参考信号的数目进行计数；以及
    基于计数的结果确定所述可用参考信号的质量。
  3. 根据权利要求2所述的电子设备，其中，所述处理电路对与所述当前小区中的可用参考信号相同的已用参考信号的数目进行计数。
  4. 根据权利要求1所述的电子设备，其中，所述处理电路进一步被配置为基于所述可用参考信号的质量对所述可用参考信号进行排序。
  5. 根据权利要求4所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    选择具有高质量的多个可用参考信号作为备选参考信号；
    将接收到的已用参考信号和所述备选参考信号中的每一个进行相关操作来估计所述备选参考信号中的每一个受到的来自所述相邻小区的干扰强度；以及
    将具有最小干扰强度的备选参考信号作为具有最高质量的可用参考信号分配给所述用户设备。
  6. 根据权利要求1所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    周期性地和/或动态地获取所述当前小区和所述相邻小区的参考信号的更新分配信息；以及
    基于所述更新分配信息更新所述当前小区中的可用参考信号的质量。
  7. 根据权利要求1所述的电子设备，其中，所述多个小区中的每一个包括多个小区分区，并且所述处理电路进一步被配置为执行以下操作：
    获取所述当前小区和所述相邻小区中的每一个的小区分区的参考信号的分配信息；以及
    基于所述分配信息确定所述用户设备所在的当前小区分区中的可用参考信号的质量。
  8. 根据权利要求7所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    获取所述相邻小区的小区分区的已用参考信号的信息；
    对与所述当前小区分区中的可用参考信号高度相关的已用参考信号的数目进行计数；以及
    基于计数的结果确定所述可用参考信号的质量。
  9. 根据权利要求8所述的电子设备，其中，所述处理电路对与所述当前小区分区中的可用参考信号相同的已用参考信号的数目进行计数。
  10. 根据权利要求7所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    选择所述当前小区分区中的具有高质量的多个可用参考信号作为备选参考信号；
    将接收到的已用参考信号和所述备选参考信号中的每一个进行相关操作来估计所述备选参考信号中的每一个受到的来自所述相邻小区或所述当前小区的其它小区分区的干扰强度；以及
    将具有最小干扰强度的备选参考信号作为具有最高质量的可用参考信号分配给所述用户设备。
  11. 根据权利要求7所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    周期性地和/或动态地获取所述当前小区和所述相邻小区中的每一个的小区分区的参考信号的更新分配信息；以及
    基于所述更新分配信息更新所述当前小区分区中的可用参考信号的质量。
  12. 根据权利要求1所述的电子设备，其中，所述参考信号为上行参考信号，所述上行参考信号包括导频信号，并且所述导频信号包括探测参考信号SRS。
  13. 根据权利要求1所述的电子设备，其中，所述参考信号为下行参考信号，并且所述下行参考信号包括小区特定参考信号CRS和信道状态信息参考信号CSI-RS中至少之一。
  14. 根据权利要求13所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    选择具有高质量的多个可用下行参考信号作为备选下行参考信号；
    获取关于所述用户设备接收到的来自所述相邻小区的已用下行参考信号的报告；
    将该用户设备接收到的已用下行参考信号和所述备选下行参考信号中的每一个进行相关操作来估计所述备选下行参考信号中的每一个受到的来自所述相邻小区的干扰强度；以及
    将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给所述用户设备。
  15. 根据权利要求13所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    选择具有高质量的多个可用下行参考信号作为备选下行参考信号以通知所述用户设备；以及
    响应于来自所述用户设备的关于所述备选下行参考信号中的每一个受到的来自所述相邻小区的干扰强度的信息，将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给所述用户设备。
  16. 根据权利要求13所述的电子设备，其中，所述处理电路进一步被配置为执行以下操作：
    确定上报阈值并选择具有高质量的多个可用下行参考信号作为备选下行参考信号以通知所述用户设备；以及
    响应于来自所述用户设备的关于所述备选下行参考信号中邻小区预期干扰值小于所述上报阈值的备选下行参考信号及预期干扰水平的信息，将具有最小干扰强度的备选下行参考信号作为具有最高质量的可用下行参考信号分配给所述用户设备。
  17. 根据权利要求1至16中任一项所述的电子设备，其中，所述电子设备为基站，并且还包括收发机，所述收发机被配置为通过X2信令获取所述相邻小区的参考信号的分配信息。
  18. 一种无线通信系统中的用户设备，在所述无线通信系统中存在多个小区，所述多个小区包括所述用户设备所在的当前小区和相邻小区，所述用户设备包括：
    收发机；以及
    一个或多个处理电路，所述处理电路被配置为使所述收发机执行以下操作：
    接收来自所述相邻小区的已用下行参考信号；
    向所述当前小区的基站通知关于接收到的已用下行参考信号的信息；以及
    从所述当前小区的基站接收具有最高质量的可用下行参考信号。
  19. 根据权利要求18所述的用户设备，其中，所述处理电路使所述收发机将接收到的已用下行参考信号转发给所述当前小区的基站。
  20. 根据权利要求18所述的用户设备，其中，所述处理电路进一步被配置为执行以下操作：
    使所述收发机从所述当前小区的基站接收多个备选下行参考信号；
    将接收到的已用下行参考信号和所述多个备选下行参考信号中的每一个进行相关操作来估计所述多个备选下行参考信号中的每一个受到的来自所述相邻小区的干扰强度；以及
    使所述收发机将关于所述多个备选下行参考信号中的每一个受到的来自所述相邻小区的干扰强度的信息发送给所述当前小区的基站。
  21. 一种用于在无线通信系统中进行无线通信的方法，在所述无线通信系统中存在多个小区，所述多个小区包括当前小区和相邻小区，所述方法包括：
    获取所述当前小区和所述相邻小区的参考信号的分配信息；
    基于所述分配信息确定所述当前小区中的可用参考信号的质量；以及
    基于所述可用参考信号的质量向用户设备分配所述可用参考信号。
  22. 一种用于在无线通信系统中进行无线通信的方法，在所述无线通信系统中存在多个小区，所述多个小区包括当前小区和相邻小区，所述方法包括：
    接收来自所述相邻小区的已用下行参考信号；
    向所述当前小区的基站通知关于接收到的已用下行参考信号的信息；以及
    从所述当前小区的基站接收具有最高质量的可用下行参考信号。
PCT/CN2016/081850 2015-07-20 2016-05-12 无线通信系统中的电子设备和无线通信方法 WO2017012397A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/744,148 US10206150B2 (en) 2015-07-20 2016-05-12 Electronic device in radio communications system and radio communications method
EP16827088.2A EP3328116A4 (en) 2015-07-20 2016-05-12 Electronic device in radio communications system and radio communications method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510427405.8 2015-07-20
CN201510427405.8A CN106374981B (zh) 2015-07-20 2015-07-20 无线通信系统中的电子设备和无线通信方法

Publications (1)

Publication Number Publication Date
WO2017012397A1 true WO2017012397A1 (zh) 2017-01-26

Family

ID=57833564

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/081850 WO2017012397A1 (zh) 2015-07-20 2016-05-12 无线通信系统中的电子设备和无线通信方法

Country Status (4)

Country Link
US (1) US10206150B2 (zh)
EP (1) EP3328116A4 (zh)
CN (1) CN106374981B (zh)
WO (1) WO2017012397A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10209217B2 (en) 2015-11-30 2019-02-19 Intabio, Inc. Devices and methods for sample characterization
US10514360B1 (en) 2018-05-31 2019-12-24 Intabio, Inc. Software for microfluidic systems interfacing with mass spectrometry
US10591488B2 (en) 2018-01-29 2020-03-17 Intabio, Inc. Devices, methods and kits for sample characterization
US10870113B1 (en) 2019-08-12 2020-12-22 Intabio, Inc. Isoelectric focusing devices and fixtures

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017067574A1 (en) * 2015-10-19 2017-04-27 Huawei Technologies Co., Ltd. Mitigating inter-cell pilot interference via network-based greedy sequence selection and exchange
CN110226342B (zh) * 2017-01-25 2021-08-20 华为技术有限公司 发送参考信号的方法和装置及接收参考信号的方法和装置
CN108668363A (zh) * 2017-03-28 2018-10-16 索尼公司 无线通信系统中的电子设备和方法
CN108964856B (zh) * 2017-05-27 2022-10-04 中兴通讯股份有限公司 一种参考信号配置信息的应用方法及装置
CN109548150A (zh) * 2017-09-21 2019-03-29 索尼公司 无线通信系统中的电子设备、方法和计算机可读存储介质
US11824637B2 (en) * 2019-05-22 2023-11-21 At&T Intellectual Property I, L.P. Generating wireless reference signals in a different domain for transmission
CN111786704B (zh) * 2020-06-03 2022-05-31 Oppo广东移动通信有限公司 一种cri选择方法、装置、用户设备及存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1707974A (zh) * 2004-06-10 2005-12-14 大唐移动通信设备有限公司 一种时分－同步码分多址系统的小区扰码分配方法
CN1913695A (zh) * 2005-08-09 2007-02-14 大唐移动通信设备有限公司 降低扇区间同频干扰的方法
US8274947B1 (en) * 2007-10-05 2012-09-25 Zte (Usa) Inc. Providing timing reference for femto cell in wireless communication networks
CN103026674A (zh) * 2010-05-28 2013-04-03 诺基亚西门子通信公司 在通信中使用参考信号

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090247164A1 (en) * 2008-03-28 2009-10-01 Qualcomm Incorporated Handoff algorithm and architecture for mobile system
KR101670053B1 (ko) * 2009-03-24 2016-10-27 한국전자통신연구원 기지국, 기지국의 셀 관리 방법, 기지국의 신호 검출 방법, 단말 및 단말의 송신 방법
US8670432B2 (en) * 2009-06-22 2014-03-11 Qualcomm Incorporated Methods and apparatus for coordination of sending reference signals from multiple cells
US9031008B2 (en) * 2009-10-30 2015-05-12 Samsung Electronics Co., Ltd. Methods and apparatus for multi-user MIMO transmissions in wireless communication systems
CN103339982B (zh) * 2011-02-09 2016-12-21 瑞典爱立信有限公司 分层的异构小区部署中的参考符号资源的有效率的使用
CN102223690A (zh) * 2011-06-17 2011-10-19 电信科学技术研究院 一种传输系统信息的方法及装置
EP2742759B8 (en) * 2011-08-12 2015-07-29 Telefonaktiebolaget L M Ericsson (publ) Methods and nodes for coordinating uplink transmissions in a wireless communication network
US9094977B2 (en) * 2011-11-11 2015-07-28 Samsung Electronics Co., Ltd. Apparatus and method for supporting mobility management in communication systems with large number of antennas
KR20130085701A (ko) * 2012-01-20 2013-07-30 삼성전자주식회사 무선통신 시스템에서 사운딩 참조 신호 자원 관리 방법 및 장치
CN109639399B (zh) * 2013-02-28 2021-01-05 华为技术有限公司 通信方法和装置
WO2014169489A1 (zh) * 2013-04-19 2014-10-23 富士通株式会社 导频资源配置方法、导频资源分配方法及其装置
WO2015041505A1 (en) * 2013-09-23 2015-03-26 Lg Electronics Inc. Method and apparatus for configuring cause value in wireless communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1707974A (zh) * 2004-06-10 2005-12-14 大唐移动通信设备有限公司 一种时分－同步码分多址系统的小区扰码分配方法
CN1913695A (zh) * 2005-08-09 2007-02-14 大唐移动通信设备有限公司 降低扇区间同频干扰的方法
US8274947B1 (en) * 2007-10-05 2012-09-25 Zte (Usa) Inc. Providing timing reference for femto cell in wireless communication networks
CN103026674A (zh) * 2010-05-28 2013-04-03 诺基亚西门子通信公司 在通信中使用参考信号

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3328116A4 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10209217B2 (en) 2015-11-30 2019-02-19 Intabio, Inc. Devices and methods for sample characterization
US10401324B2 (en) 2015-11-30 2019-09-03 Intabio, Inc. Devices and methods for sample characterization
US10782264B2 (en) 2015-11-30 2020-09-22 Intabio, Inc. Devices and methods for sample characterization
US11573200B2 (en) 2015-11-30 2023-02-07 Intabio, Llc Devices and methods for sample characterization
US10591488B2 (en) 2018-01-29 2020-03-17 Intabio, Inc. Devices, methods and kits for sample characterization
US10866246B2 (en) 2018-01-29 2020-12-15 Intabio, Inc. Devices, methods and kits for sample characterization
US10514360B1 (en) 2018-05-31 2019-12-24 Intabio, Inc. Software for microfluidic systems interfacing with mass spectrometry
US10870113B1 (en) 2019-08-12 2020-12-22 Intabio, Inc. Isoelectric focusing devices and fixtures
US11224875B2 (en) 2019-08-12 2022-01-18 Intabio, Llc Isoelectric focusing devices and fixtures
US11285484B2 (en) 2019-08-12 2022-03-29 Intabio, Llc Multichannel isoelectric focusing devices and high voltage power supplies

Also Published As

Publication number Publication date
CN106374981A (zh) 2017-02-01
CN106374981B (zh) 2021-01-08
US20180206157A1 (en) 2018-07-19
US10206150B2 (en) 2019-02-12
EP3328116A1 (en) 2018-05-30
EP3328116A4 (en) 2018-12-12

Similar Documents

Publication Publication Date Title
WO2017012397A1 (zh) 无线通信系统中的电子设备和无线通信方法
USRE49823E1 (en) Apparatus and method for transmitting and receiving signal in a mobile communication system
TWI710255B (zh) 無線通訊系統中的電子設備、用戶設備和無線通訊方法
US11979896B2 (en) Electronic device and method for wireless communication, and computer-readable storage medium for guard band based on interference caused by overlapping of different radio access technologies
US20200351737A1 (en) Device and method
US10708941B2 (en) Apparatus for acquiring and reporting power allocation
US10750517B2 (en) Communication control device, communication control method, and communication device
JP7131549B2 (ja) 無線通信システムにおける電子機器、及び方法
US20210136845A1 (en) Electronic device and method for wireless communications
CN111373770B (zh) 电子设备、用户设备、方法和计算机可读存储介质
WO2016066098A1 (zh) 用于无线通信的装置和方法
JP2021532657A (ja) ユーザ機器、電子機器、無線通信方法及び記憶媒体
US10327248B2 (en) Communication control apparatus, communication control method and terminal apparatus
CN106416104B (zh) 一种设备
WO2018128029A1 (ja) 端末装置、基地局装置、方法及び記録媒体
WO2021190435A1 (zh) 用于无线通信的电子设备和方法、计算机可读存储介质
WO2016121252A1 (ja) 装置及び方法
US11095405B2 (en) Electronic device and method for wireless communication
US20170041800A1 (en) Device
CN116939818A (zh) 用于无线通信的电子设备和方法、计算机可读存储介质
CN115699653A (zh) 用于可观测性的通用资源模型
TW201605262A (zh) 裝置及方法

Legal Events

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

Ref document number: 16827088

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 15744148

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2016827088

Country of ref document: EP