WO2023000256A1 - 可重构表面装置、基站和用户装置 - Google Patents

可重构表面装置、基站和用户装置 Download PDF

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Publication number
WO2023000256A1
WO2023000256A1 PCT/CN2021/107861 CN2021107861W WO2023000256A1 WO 2023000256 A1 WO2023000256 A1 WO 2023000256A1 CN 2021107861 W CN2021107861 W CN 2021107861W WO 2023000256 A1 WO2023000256 A1 WO 2023000256A1
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WIPO (PCT)
Prior art keywords
reconfigurable
base station
surface device
information
reconfigurable surface
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PCT/CN2021/107861
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English (en)
French (fr)
Inventor
李翔
王新
侯晓林
陈岚
须山聡
Original Assignee
株式会社Ntt都科摩
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.)
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Application filed by 株式会社Ntt都科摩 filed Critical 株式会社Ntt都科摩
Priority to US18/568,135 priority Critical patent/US20240275433A1/en
Priority to PCT/CN2021/107861 priority patent/WO2023000256A1/zh
Priority to CN202180099046.1A priority patent/CN117441300A/zh
Publication of WO2023000256A1 publication Critical patent/WO2023000256A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/04013—Intelligent reflective surfaces
    • H04B7/04026—Intelligent reflective surfaces with codebook-based beamforming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/391—Modelling the propagation channel
    • 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
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the present disclosure relates to the field of wireless communication, and more particularly to a reconfigurable surface device, a base station and a user device.
  • RIS Reconfigurable intelligent surface
  • RIS can collect the signals sent by the signal sending end and send these signals to the signal receiving end through beamforming.
  • RIS has the characteristics of low cost and low power consumption, which provides a new possibility for solving the coverage and capacity problems of mobile communication systems.
  • RIS panels such as 1 m x 1 m
  • the traditional beamforming scheme is only designed for the transmission of far-field signals, the near-field performance is not good.
  • a base station includes: a control unit configured to determine configuration information about a reconfigurable surface device based on a location of a user device; and a sending unit configured to send the configuration information to the reconfigurable surface device, so that The reconfigurable surface device determines a codebook used by the reconfigurable surface device based on the configuration information.
  • the configuration information further includes at least one of the following: information associated with the working mode of the reconfigurable surface device, information associated with a default codebook of the reconfigurable surface device, Information associated with the manner in which the reconfigurable surface device uses a codebook.
  • the sending unit is further configured to: send control information to the reconfigurable surface device, where the control information includes information of a time period corresponding to a codeword associated with the codebook.
  • the sending unit is further configured to: send the configuration information to the reconfigurable surface device through an IP interface or an Xn interface; or send the configuration information to the reconfigurable surface device through a wireless interface.
  • a reconfigurable surface device further includes a sending unit, and the sending unit is further configured to feed back a configuration response message to the base station, where the configuration response message indicates configuration success or configuration failure.
  • the sending unit is further configured to: report information related to the type of the reconfigurable surface device to the base station in the RRC process, and when the reconfigurable surface device is a base station type, report to the base station
  • the user device transmits information required for initial access.
  • information required for initial access may include synchronization information and broadcast channel information, such as SSB messages, necessary system information (SIB), and RACH configuration and RACH messages.
  • the configuration information associated with the location of the user equipment is received through a downlink channel, such as DL-SCH, and the configuration response message is sent through an uplink channel, such as UL-SCH.
  • a downlink channel such as DL-SCH
  • the configuration response message is sent through an uplink channel, such as UL-SCH.
  • a user device includes: a control unit configured to acquire location information of the user equipment; a sending unit configured to send location information to a base station; a receiving unit configured to receive a message specific to the user equipment, wherein, The user device specific messages are transmitted by the base station to the reconfigurable surface device and reflected/transmitted by the reconfigurable surface device to the user device.
  • the location information is included in the CSI report transmitted by the user equipment to the base station, and the CSI report is at least one of periodic CSI report, semi-periodic CSI report or semi-static CSI report .
  • the location information is included in a CSI report transmitted by the user equipment to the base station, and the CSI report only includes the location information.
  • the location information is included in an RS transmitted by the user equipment to the base station.
  • the parameters of the RIS are adaptively adjusted according to the user position, so as to reduce near-field performance loss and enhance signal gain.
  • Fig. 1 shows a schematic diagram of a wireless communication system in which embodiments of the present disclosure may be applied.
  • Fig. 2 is a schematic block diagram illustrating a base station according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic block diagram illustrating a reconfigurable surface device according to one embodiment of the present disclosure.
  • FIG. 4A is an exemplary diagram illustrating an array element state of a reconfigurable panel of a reconfigurable surface device according to an embodiment of the disclosure.
  • FIG. 4B is an exemplary diagram illustrating another array element state of a reconfigurable panel of a reconfigurable surface device according to an embodiment of the disclosure.
  • FIG. 5 is another example diagram illustrating the state of array elements of a reconfigurable panel of a reconfigurable surface device according to an embodiment of the present disclosure.
  • FIG. 6 is another example diagram illustrating the state of array elements of a reconfigurable panel of a reconfigurable surface device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic block diagram illustrating a user device according to an embodiment of the present disclosure.
  • FIG. 8A is an exemplary diagram illustrating an initial access procedure and an RIS beam selection and transmission procedure according to one embodiment of the present disclosure.
  • FIG. 8B is an exemplary diagram illustrating signaling interaction of a user device type reconfigurable surface device in a communication system according to an embodiment of the present disclosure.
  • FIG. 8C is an exemplary diagram illustrating signaling interaction of a base station type reconfigurable surface device in a communication system according to an embodiment of the present disclosure.
  • FIG. 9A is an example flowchart illustrating a method performed by a base station according to one embodiment of the present disclosure.
  • FIG. 9B is an example flowchart illustrating a method performed by a reconfigurable surface device according to one embodiment of the present disclosure.
  • FIG. 9C is an example flowchart illustrating a method performed by a user device according to one embodiment of the present disclosure.
  • Fig. 10 is a schematic diagram of a hardware structure of a device involved according to an embodiment of the present disclosure.
  • This disclosure refers to the terms Large intelligent surface, intelligent reflecting surface, reconfigurable intelligent surface, passive intelligent surface, reconfigurable metasurface reconfigurable metasurface), soft-defined surface (software defined surface), soft-defined metasurface (software defined metasurface), large intelligent metasurface, smart reflect array, etc.
  • FIG. 1 shows a schematic diagram of a communication system 100 in which embodiments of the present disclosure may be applied.
  • the communication system 100 shown in FIG. 1 may be a 5G communication network or a 6G communication network, or any other type of wireless communication network, such as a 4G communication network.
  • a 6G communication network is taken as an example to describe embodiments of the present disclosure, but it should be recognized that the following description may also be applicable to other types of wireless communication networks.
  • the communication system 100 may include a base station, a reconfigurable surface device, and a user terminal in a 6G communication network.
  • the communication between the base station and the user terminal may cause poor channel quality due to the existence of obstacles.
  • the reconfigurable surface device can reflect or transmit wireless signals in the environment.
  • the base station can send the information to be sent to the user device to the reconfigurable surface device, and then the reconfigurable surface device can reflect/transmit the information to the user device.
  • the user equipment can send the information to be sent to the base station to the reconfigurable surface device, and then the reconfigurable surface device can reflect/transmit the information to the base station.
  • the reconfigurable surface device transmits information to the user through beamforming as an example, it should be understood that the solution of the present disclosure is also applicable to the base station directly providing a communication link to the user, so that The case of communicating directly with a user device.
  • the reconfigurable surface device shown in Figure 1 can be either a passive reconfigurable surface (Passive RIS) device or an active reconfigurable surface (Active RIS) device.
  • the reconfigurable surface device may be deployed in a channel to improve end-to-end (E2E) signal quality.
  • the reconfigurable surface device deployed in the channel can compensate the path loss caused by reflection/transmission, adjust the RIS parameters as the channel changes with time, and assist in the realization of low-latency full-duplex relay.
  • the reconfigurable surface device is an active reconfigurable surface device
  • the reconfigurable surface device can be deployed in the transmitting end to reduce cost and power consumption. Thanks to new metamaterials that make it possible to integrate a large number of RIS elements to increase array gain, active reconfigurable surface devices can control radio signals without conventional PSN and/or RF chains.
  • CSI channel state information
  • the base station can jointly determine the beamforming coefficient between the base station and the user equipment and the beamforming coefficient between the reconfigurable surface device and the user equipment together with the reconfigurable surface device, and then the base station The reconfigurable surface device may be informed of the associated beamforming configuration via the RIS control link. Since the reconfigurable surface device is currently unable to achieve channel estimation based on pilot measurements, it is difficult for current solutions to directly obtain channel quality information between the base station and the reconfigurable surface device, and/or between the reconfigurable surface device and the user device The channel quality information between them is less practical.
  • DFT-based traditional beam codebook it is also proposed to use a DFT-based traditional beam codebook to try to solve the above problems.
  • the DFT-based traditional beam codebook is designed for far-field users, the DFT-based traditional beam codebook suffers a large performance loss in the near-field.
  • the parameters of the RIS are adaptively adjusted according to the user position, so as to reduce near-field performance loss and enhance signal gain.
  • Fig. 2 is a schematic block diagram illustrating a base station 200 according to an embodiment of the present disclosure.
  • a base station 200 according to an embodiment of the present disclosure may include a control unit 210 and a sending unit 220.
  • the base station 200 may also include other components. However, since these components are irrelevant to the content of the embodiments of the present disclosure, illustration and description thereof are omitted here.
  • control unit 210 may be configured to determine configuration information about the reconfigurable surface device based on the location of the user device.
  • the sending unit 220 may be configured to send the configuration information to the reconfigurable watch device, so that the reconfigurable watch device determines the codebook used by the reconfigurable watch device based on the configuration information.
  • configuration information may indicate the location of the user device in an explicit or implicit manner.
  • configuration information may include geographic coordinates (eg, 3D coordinates) of the user device, or a distance of the user device from the reconfigurable surface device, or a direction of the user device relative to the reconfigurable surface device, and the like.
  • the position of the user device may be a relative position of the user device and the reconfigurable surface device.
  • the configuration information may also indicate the location of the user equipment in a distance-quantified manner.
  • the configuration information may use different bits to indicate whether the user device is within the near-field range of the reconfigurable surface device.
  • the above-mentioned near-field range may be determined according to the specific configuration of the communication system. Those skilled in the art should understand that the present disclosure is not limited thereto.
  • the codebook used by the reconfigurable surface device may also be calculated based on quantized parameters.
  • the quantized parameter may be a logarithmic quantized distance between the user device and the reconfigurable surface device.
  • the quantized parameters can be packed into binary vectors and used as codeword indicators for the codebook.
  • the codebook used by the reconfigurable surface device is associated with the state of the array elements of the reconfigurable panel.
  • the array element status of the reconfigurable panel may be the subarray area, the number of subarrays, and the beam deflection of the subarray, etc. of the reconfigurable panel.
  • the subarray area is positively correlated with the gain and near-field range of the reconfigurable panel.
  • the deflection mode and direction of the subarray beam are related to the coverage of the reconfigurable panel.
  • adjusting the codebook based on the location information of the user equipment and then adjusting the state of the array elements of the reconfigurable panel will help to reduce the impact on the near-field user equipment, increase the signal gain, and adjust the coverage of the signal.
  • How the reconfigurable watch device determines the codebook used by the reconfigurable watch device based on the configuration information (or the location of the user device) will be described later with reference to FIGS. 4 to 6 , and details will not be repeated here.
  • the configuration information may also include at least one of the following items: information associated with the working mode of the reconfigurable surface device, information associated with the codebook of the reconfigurable surface device Information, information associated with the manner in which the reconfigurable surface device uses the codebook.
  • the information associated with the mode of operation of the reconfigurable surface device may indicate whether the reconfigurable surface device is dynamically operated, statically operated or semi-statically operated.
  • the information associated with the operating mode of the reconfigurable surface device may also indicate whether the reconfigurable surface device changes its operating mode, such as changing from dynamic operation to static operation/semi-static operation, or from static operation to static operation. / Semi-static operation changed to dynamic operation and so on.
  • the reconfigurable surface device can dynamically adjust the codeword it uses according to the dynamic codeword switching message received from the base station or user equipment, so as to improve the communication link. quality of the road.
  • the reconfigurable surface device can also dynamically adjust the codebook it uses according to the dynamic codebook switching message received from the base station or the user equipment.
  • the present disclosure does not limit the mode of operation of the reconfigurable surface device.
  • the information associated with the codebook of the reconfigurable surface device may indicate the quantization resolution of the codebook.
  • the quantization resolution of the codebook may be associated with the (logarithmic) quantized distance between the user device and the reconfigurable surface device, and this disclosure does not limit how to design the quantization resolution of the codebook.
  • the information associated with the codebook of the reconfigurable surface device may also indicate a default codebook used by the reconfigurable surface device.
  • the default codebook may be the initial codebook used by the reconfigurable surface device.
  • information associated with the manner in which the reconfigurable surface device uses a codebook may indicate how a default codebook is used. For example, in the case that the reconfigurable surface device does not receive the codebook switching message, the base station may use the configuration information to instruct the reconfigurable surface device to use the default codebook or continue to use the latest codebook. Furthermore, alternatively, the information associated with the manner in which the reconfigurable surface device uses the codebook may also indicate how to use the default codeword. For example, in the case that the reconfigurable surface device does not receive a codeword switching message, the base station may use the configuration information to instruct the reconfigurable surface device to use a default codeword or continue to use the latest codeword.
  • the sending unit is further configured to send control information to the reconfigurable surface device, where the control information includes information of a time period corresponding to a codeword associated with the codebook.
  • the time period is in units of time slots (slots).
  • the control information may indicate that the reconfigurable surface device uses a time slot of a certain codeword.
  • the control information may also indicate codeword sequences used by the reconfigurable surface device in multiple consecutive time slots.
  • the control information may also indicate that the reconfigurable surface device uses a start time slot, an end time slot, etc. of a certain codeword.
  • the control information may also instruct the reconfigurable surface device to use a certain codeword every few time slots, or to use a certain codeword until a codeword switching command is received, and so on.
  • the sending unit may also be configured to: send the configuration information (or control information) to the reconfigurable surface device through a wired IP network interface such as the Internet or an inter-base station interface such as Xn.
  • the sending unit may be further configured to: send the configuration information (or control information) to the reconfigurable surface device through a wireless interface.
  • the reconfigurable surface device may be provided with a module related to the IoT client to receive the above-mentioned configuration information or control information through the air interface.
  • the base station can also send other information related to the user equipment to the reconfigurable surface device so that the reconfigurable surface device can determine the codebook/codeword, such as the moving speed of the user equipment, whether it is located at the edge of the coverage area of the base station, or near the user equipment. Whether other user devices exist or not is not limited by the present disclosure.
  • the base station sends the configuration information related to the location of the user equipment to the reconfigurable surface device, and the reconfigurable surface device can adaptively adjust the parameters of the RIS according to the user location (for example, The codebook or codeword it uses), which can reduce near-field performance loss and enhance signal gain.
  • FIG. 3 is a schematic block diagram illustrating a reconfigurable surface device 300 according to one embodiment of the present disclosure.
  • a reconfigurable surface device 300 may include a receiving unit 310 , a control unit 320 and a reconfigurable panel 330 .
  • the reconfigurable surface device 300 may also include other components, which will not be repeated here.
  • the receiving unit 310 is configured to receive configuration information associated with the location of the user equipment from the base station.
  • the control unit 320 is configured to determine a codebook used by the reconfigurable surface device based on the configuration information, the codebook being associated with the array element state of the reconfigurable panel.
  • the reconfigurable panel 330 is configured to reflect/transmit to the user equipment the message sent by the base station to the user equipment.
  • the reconfigurable surface device further includes a sending unit.
  • the sending unit may be configured to feed back a configuration response message to the base station, where the configuration response message indicates configuration success or configuration failure.
  • the sending unit may also be configured to report information related to the type of the reconfigurable surface device to the base station during the RRC process.
  • the information related to the type of the reconfigurable surface device may indicate whether the reconfigurable surface device is a user device type or a base station type. Different types of reconfigurable surface devices may correspond to different signaling interaction processes and different signal transmission interfaces.
  • the sending unit may also be configured to send SSB messages, SIB messages, and RACH-related messages for the user equipment to the user equipment.
  • the configuration information associated with the location of the user equipment may be received through a downlink channel, such as DL-SCH (Downlink Shared Channel), and the configuration response message may be received through an uplink channel, such as UL-SCH (Uplink Shared Channel). channel) to send.
  • DL-SCH Downlink Shared Channel
  • UL-SCH Uplink Shared Channel
  • the array element status of the reconfigurable panel can be the subarray area, the number of subarrays, and the beam deflection of the subarray, etc., so that the reconfigurable panel can be adjusted to reduce near-field performance loss and compensate for the loss of communication Path loss in the link, adjust communication coverage, etc.
  • FIG. 4A is an example diagram illustrating an array element state of a reconfigurable panel of a reconfigurable surface device 300 according to an embodiment of the present disclosure.
  • FIG. 4B is an example diagram showing still another array element state of the reconfigurable panel of the reconfigurable surface device 300 according to an embodiment of the present disclosure.
  • FIG. 5 is another exemplary diagram showing the state of array elements of the reconfigurable panel of the reconfigurable surface device 300 according to an embodiment of the present disclosure.
  • FIG. 6 is still another example diagram showing the state of array elements of the reconfigurable panel of the reconfigurable surface device 300 according to an embodiment of the present disclosure.
  • the state of the array elements of the reconfigurable panel may include the sub-array division mode of the reconfigurable panel and the beam deflection mode of the sub-array.
  • the sub-array division method and sub-array beam deflection method corresponding to the reconfigurable panel will be described below for different user equipment locations.
  • the reconfigurable surface device can use different codebooks/codewords, and the codebook/codeword used by the reconfigurable surface device is the same as
  • the sub-array division method of the reconfigurable panel of the reconfigurable surface device and the beam deflection method of the sub-array are related.
  • the reconfigurable surface device may set a two-layer codebook according to configuration information associated with the location of the user equipment received from the base station.
  • the first-level codebook involves subarray area, number of sub-arrays and reference beams
  • the second-level codebook involves beam deflection. That is, the codebook of the first layer is an intra-subarray codebook, and the codebook of the second layer is an inter-subarray codebook.
  • the smaller the reconfigurable panel can be divided into sub-arrays of smaller size.
  • the reconfigurable panel of the reconfigurable surface device can be divided into 16 sub-arrays.
  • the area of each sub-array is small, and the range of the near field formed by each sub-array is also small. In this case, even if the user device is located relatively close to the reconfigurable panel, for each sub-array, it is still in the far field of the sub-array.
  • the reconfigurable surface device may determine a codebook corresponding to sub-arrays where the reconfigurable panel is divided into smaller areas to reduce the user device's near-field influences.
  • FIG. 5 shows an example in which the reconfigurable surface device selects 5 sub-arrays from the 16 sub-arrays in FIG. 4A to serve the user device based on the configuration information.
  • the reconfigurable panel is divided into M sub-arrays, and N sub-arrays in the M sub-arrays can be used to serve a single user device.
  • M is a positive integer greater than 1
  • N is a positive integer greater than 1 and less than or equal to M.
  • each of the M sub-arrays divided by the reconfigurable panel corresponds to a specific beam.
  • a specific beam may also be a beam emanating from a corresponding subarray.
  • the configuration information can also indicate the direction of the user equipment relative to the reconfigurable panel, so the first-level codebook can also contain information related to the reference beam of each sub-array, and the reference beam is the same for each sub-array .
  • the reconfigurable surface device can deflect the specific beams of the N sub-arrays in the M sub-arrays relative to the reference beam by setting the second layer codebook, so that the specific beams can converge on at the user device.
  • FIG. 5 shows an example of focusing specific beams of 5 sub-arrays in the 16 sub-arrays in FIG. 4A at the user equipment by using the second layer codebook.
  • the reconfigurable surface device can further determine the second-layer codebook according to the configuration information to configure the reflected/transmitted beams of each sub-array (that is, the specific beam of each sub-array) for deflection.
  • the deflection direction of the specific beam of each sub-array is also different, so the second layer codebook set according to the configuration information is for each sub-array Arrays may be specific such that the beams of each sub-array converge at the user device after deflection.
  • the reconfigurable panel of the reconfigurable surface device can be divided into 4 sub-arrays.
  • the area of each sub-array is larger, and the near-field range formed by each sub-array is also larger.
  • the user device is in the far field of the sub-array even though the user device is still in the near field range of the reconfigurable panel.
  • the reconfigurable surface device may determine a codebook corresponding to sub-arrays where the reconfigurable panel is divided into larger areas. Due to the large distance between the user device and the reconfigurable panel, even a sub-array with a large area will not cause significant near-field influence on the user device.
  • Table 1 and Table 2 below respectively show the relationship between the near-field range of the sub-array and the area of the sub-array of the reconfigurable surface device using the Rayleigh distance as an example in the case of 3GHz and 30GHz signals.
  • Subarray area 0.5m*0.5m 1m*1m 5m*5m Near-field range for 3GHz signals 2.5 meters 10 m 250 meters
  • Subarray area 0.25m*0.25m 0.5m*0.5m 1m*1m Near-field range for 30GHz signals 6 meters 25 meters 100 metres
  • the reconfigurable surface device can determine the codebook used by the reconfigurable surface device according to the configuration information associated with the location of the user equipment received from the base station, so as to adjust the array element state of the reconfigurable panel according to the codebook , for example, the subarray area, subarray number and subarray beam deflection of the panel can be reconfigured.
  • the reconfigurable surface device can reduce near-field performance loss and enhance signal gain.
  • the reconfigurable surface device can further adjust the array element state to serve user devices in different scenarios.
  • the configuration information may also indicate that the user equipment is located at the edge of the coverage of the base station, or further indicate that the current signal transmission rate of the user equipment is relatively low.
  • the reconfigurable surface device may determine to use multiple sub-arrays to serve the user device, and the reflected or transmitted beams of the multiple sub-arrays may be focused at the user device to improve signal quality. If the distance between the user device and the reconfigurable surface device is relatively short, multiple smaller sub-arrays can also be used to serve the user device to further improve the signal quality.
  • the configuration information may also indicate that the user equipment is in a moving state, or there is an obstruction in the transmission path between the base station and the user equipment.
  • the reconfigurable surface device may also determine to use multiple sub-arrays to serve the user device, and the beams of each of the multiple sub-arrays may not be focused on the same position, so that the reconfigurable surface The beam reflected/transmitted by the device can cover a large range, so that the user device can robustly receive a stable signal in this situation.
  • the codebook determined at this time may indicate that the size of the area of the sub-array is moderate to cover a larger range.
  • the configuration information may also indicate that the base station-reconfigurable surface device -
  • the communication link of the user device is a complement/multiplex of the base station-user device communication link.
  • the reconfigurable surface device may also determine a codebook indicating that a medium-sized or small-sized subarray area is selected to increase the multiplexing gain.
  • multiple sub-arrays may also be used to serve the user device. The codewords/codebooks used by the multiple sub-arrays can be different to balance the signal gain of both the base station-reconfigurable surface device communication path and the reconfigurable surface device-user device communication path to enhance the signal gain.
  • Example 4 in the case that the same reconfigurable watch device serves multiple user devices, different sub-array areas and sub-array numbers may be configured for different users based on the locations of different user devices.
  • an orthogonal multiplexing (time-division or frequency-division) waveform or a non-orthogonal (NOMA) waveform may also be used to balance the signal gains among the various user equipments.
  • the reconfigurable surface device may determine the codebook/codeword according to the configuration information associated with the location of the user device.
  • the reconfigurable surface device can also determine the codebook/codeword according to other information of the user device, such as the moving speed of the user device, whether it is located at the edge of the coverage of the base station, whether there are other user devices near the user device, etc. Disclosure does not limit this.
  • FIG. 7 is a schematic block diagram illustrating a user device 400 according to an embodiment of the present disclosure.
  • a reconfigurable surface device 400 may include a control unit 410 , a sending unit 420 and a receiving unit 430 .
  • the control unit 410 the sending unit 420 and the receiving unit 430
  • the user equipment 400 may also include other components, which will not be repeated here.
  • the control unit 410 is configured to acquire location information of the user equipment.
  • the sending unit 420 is configured to send location information to the base station.
  • the receiving unit 430 is configured to receive the user equipment specific message. Wherein, the user device specific message is transmitted by the base station to the reconfigurable surface device, and reflected/transmitted by the reconfigurable surface device to the user device.
  • the base station 200 needs to determine configuration information about the reconfigurable surface device 300 based on the location of the user device 400.
  • an enhanced CSI is provided to implement the location reporting of the additional user equipment 400, so that the base station 200 determines the configuration information and the reconfigurable surface device 300 determines the codebook.
  • the location information may be included in a CSI report transmitted by the user equipment to the base station, and the CSI report is at least one of a periodic CSI report, a semi-periodic CSI report, or a semi-static CSI report item.
  • the CSI report may also include various other information, for example, channel quality information between the reconfigurable surface device detected by the user device and the user device, etc., which is not limited in the present disclosure.
  • a new type of CSI feedback report may also be defined.
  • the location information may also be included in a CSI report transmitted by the user equipment to the base station, and the CSI report only includes the location information.
  • the location information may also be included in an RS (Reference Signal) transmitted by the user equipment to the base station.
  • the reference signal is used by the base station to measure/estimate the location of the user equipment.
  • the reference signal is used by the base station to measure/estimate the location of the user equipment with the assistance of the reconfigurable surface device 300 .
  • the base station 200 can conveniently obtain the location information of the user equipment 400, so as to realize subsequent configuration information and/or codebook determination.
  • FIG. 8A is an exemplary diagram illustrating an initial access procedure and an RIS beam selection and transmission procedure according to one embodiment of the present disclosure.
  • FIG. 8B is an exemplary diagram illustrating signaling interaction of a reconfigurable surface device 300 of a user device type in a communication system 100 according to an embodiment of the present disclosure.
  • FIG. 8C is an exemplary diagram illustrating signaling interaction of a base station type reconfigurable surface device 300 in a communication system 100 according to an embodiment of the present disclosure.
  • the sending module 220 of the base station 200 may send configuration information to the reconfigurable surface device 300 through a Uu link or other links.
  • the configuration information here may be non-user device-specific configuration information, which optionally includes information associated with the working mode of the reconfigurable watch device 300, information associated with the codebook of the reconfigurable watch device 300, The surface device 300 reconstructs associated information and the like using a codebook.
  • the configuration information here may also be user device-specific configuration information, and the present disclosure is not limited thereto.
  • the sending unit of the reconfigurable surface device 300 is further configured to feed back a configuration acknowledgment message (ACK) to the base station 200, the configuration acknowledgment message indicating configuration success or configuration failure.
  • ACK configuration acknowledgment message
  • the base station 200 can transmit the SSB or SSB1 information to the reconfigurable surface device 300 , and then the reconfigurable surface device 300 can reflect/transmit the SSB or SSB1 information to the user device 400 .
  • the base station 200 may also send other SIB information through other communication links between it and the user equipment 400, for example, the base station 200 may send these SIB information in a broadcast manner.
  • the base station 200 and the user equipment 400 will complete the RACH process in the initial access process, and optionally perform the RRC process.
  • the initial access process of the reconfigurable surface device 300 and the user device 400 to the base station 200 is completed, and the three can communicate through the established communication link.
  • the user device 400 may move in the area covered by the base station 200 , or be located within the near-field range of the reconfigurable surface device 300 .
  • the codebook and/or codeword configured by the reconfigurable surface device 300 in the initial access procedure may need to be further adjusted to improve signal gain and near-field performance.
  • the base station 200 can optionally use the RRC configuration process to further configure the user equipment 400 .
  • the base station 300 can configure the user equipment 400 to report location information.
  • the base station 300 configures the user equipment 400 to report the location of the user equipment through enhanced CSI reporting.
  • the enhanced CSI report only includes the location of the user equipment.
  • the base station 300 can also configure the user equipment 400 to report the user location in other ways.
  • the base station can also configure the user equipment 400 to perform periodic CSI reporting, semi-periodic CSI reporting, or semi-static CSI reporting, etc., or configure the user equipment 400 to send reference messages for measuring the location of the user equipment, etc.
  • the present disclosure is not limited thereto.
  • the base station 200 may send configuration information and control information specific to the user equipment 400 to the reconfigurable surface device 300 in the manner described in FIG. 2 .
  • configuration information and control information specific to the user equipment 400 may be sent over a UU link or other links.
  • the reconfigurable watch device 300 may also receive the configuration information associated with the location of the user equipment through the DL-SCH.
  • the reconfigurable surface device 300 may also send a configuration response message through UL-SCH.
  • the base station 200 can send the user device 400 specific data to the reconfigurable surface device 300 , and the reconfigurable surface device 300 can use its reconfigurable panel 330 to reflect/transmit the user device 400 specific data.
  • the base station 200 may send a codeword switching command to the reconfigurable surface device 300 so that the reconfigurable surface device 300 adjusts the array element state of the reconfigurable panel 330 .
  • the sending unit of the reconfigurable surface device 300 is further configured to report information related to the type of the reconfigurable surface device to the base station during the RRC process.
  • the information related to the type of the reconfigurable surface device may indicate whether the type of the reconfigurable surface device is a base station type or a user equipment type.
  • the combination of the receiving unit 310 , the control unit 320 and the transmitting unit in the reconfigurable surface device 300 is drawn as a controller.
  • the controller is used to interact with the base station side during the RRC process.
  • the controller in FIG. 8B can be regarded as a new type of user side node.
  • the transmission of RIS-related SSB and SIB1 information and other SIB information, RACH process and RRC process drawn in FIG. 8B are similar to the corresponding transmission process in the initial access process in FIG. 8A , and will not be repeated here.
  • the base station 200 transmits the configuration information associated with the location of the user equipment 400 to the reconfigurable watch device 300 through the DL-SCH.
  • the receiving unit 310 in the controller receives the configuration information.
  • the control unit 320 in the controller determines the codebook used by the reconfigurable panel 330 according to the configuration information, or selects an appropriate codeword from the default codebook, and configures the reconfigurable panel 330 accordingly.
  • the sending unit in the controller sends configuration response information through the UL-SCH, which indicates configuration success or configuration failure.
  • the reconfigurable panel 330 reflects/transmits various information from the base station to the user device 400 . These information include SSB messages, SIB messages, RACH process-related messages, RRC process-related messages, etc. for the user equipment.
  • the combination of the receiving unit 310 , the control unit 320 and the transmitting unit in the reconfigurable surface device 300 is drawn as a controller.
  • the controller is used to interact with the base station side during the RRC process.
  • the controller in FIG. 8C can be regarded as a new type of base station side node, for example, a new type of integrated radio access and backhaul (IAB) node.
  • IAB node can be used to process and transmit various types of messages and information, for example, SSB related messages, SIB1 related messages, other SIB messages, RACH process related messages and RRC process related messages, etc.
  • the controller in FIG. 8C may only be used to process messages related to the SSB process and the RACH process. Therefore, going further, the controller in FIG. 8C can be regarded as a simplified IAB node.
  • the controller in FIG. 8C can also process other process-related messages, which is not limited in the present disclosure.
  • the base station 200 transmits the configuration information associated with the location of the user equipment 400 to the reconfigurable watch device 300 through the DL-SCH.
  • the receiving unit 310 in the controller receives the configuration information.
  • the control unit 320 in the controller determines the codebook used by the reconfigurable panel 330 according to the configuration information, or selects an appropriate codeword from the default codebook, and configures the reconfigurable panel 330 accordingly.
  • the sending unit in the controller sends configuration response information through the UL-SCH, which indicates configuration success or configuration failure.
  • the controller may send information required for initial access to the user equipment.
  • information required for initial access may include synchronization information and broadcast channel information, such as SSB messages, necessary system information (SIB) messages, and RACH configuration and RACH messages.
  • the reconfigurable panel 330 may reflect/transmit the above-mentioned message and the like to the user device.
  • the parameters of the RIS can be adaptively adjusted according to the user position, so as to reduce near-field performance loss and enhance signal gain.
  • FIGS. 9A to 9C Various methods according to embodiments of the present disclosure are described below with reference to FIGS. 9A to 9C .
  • FIG. 9A is a flowchart of a method 9000 performed by a base station according to an embodiment of the present disclosure. Since the steps of the method 9000 performed by the base station correspond to the operations of the base station 200 described above with reference to the figures, detailed descriptions of the same content are omitted here for simplicity.
  • step S9001 the base station determines configuration information about the reconfigurable surface device based on the location of the user device. Then in step S9002, the base station sends the configuration information to the reconfigurable watch device, so that the reconfigurable watch device determines the codebook used by the reconfigurable watch device based on the configuration information. For example, the base station may also send control information to the reconfigurable surface device, where the control information includes information about a time period corresponding to a codeword associated with the codebook.
  • the configuration information further includes at least one of the following items: information associated with the working mode of the reconfigurable surface device, information associated with the codebook of the reconfigurable surface device, and The reconfigurable surface device associates information using a codebook.
  • the configuration information may be sent to the reconfigurable surface device through an IP interface or an Xn interface, or the configuration information may be sent to the reconfigurable surface device through a wireless interface.
  • Figure 9B is a flowchart of a method 9010 performed by a reconfigurable surface device according to one embodiment of the present disclosure. Since the steps of the method 9010 performed by the reconfigurable surface device correspond to the operations of the reconfigurable surface device 300 described above with reference to the figures, detailed descriptions of the same content are omitted here for simplicity.
  • step S9011 the reconfigurable surface device receives configuration information associated with the location of the user device from the base station. Then in step S9012, the codebook used by the reconfigurable surface device is determined based on the configuration information, and the codebook is associated with the array element state of the reconfigurable panel. Next, in step S9013, the user equipment reflects/transmits the message sent by the base station to the user equipment.
  • the reconfigurable surface device also feeds back a configuration response message to the base station, where the configuration response message indicates configuration success or configuration failure.
  • the reconfigurable surface device also reports information related to the type of the reconfigurable surface device to the base station during the RRC process. If the reconfigurable surface device is a base station type, the reconfigurable surface device sends SSB messages, SIB messages, and RACH-related messages for the user equipment to the user equipment.
  • the configuration information associated with the location of the user equipment is received through DL-SCH, and the configuration response message is sent through UL-SCH.
  • FIG. 9C is a flowchart of a method 9020 performed by a user device according to one embodiment of the present disclosure. Since the steps of the method 9020 performed by the reconfigurable watch device correspond to the operations of the user device 400 described above with reference to the figures, detailed descriptions of the same content are omitted here for simplicity.
  • step S9021 the user equipment obtains the location information of the user equipment. Then in step S9022, the location information is sent to the base station. Next, in step S9023, the user equipment specific message is received. Wherein, the user device specific message is transmitted by the base station to the reconfigurable surface device, and reflected/transmitted by the reconfigurable surface device to the user device.
  • the location information is included in the CSI report transmitted by the user equipment to the base station, and the CSI report is at least one of periodic CSI report, semi-periodic CSI report or semi-static CSI report .
  • the location information is included in a CSI report transmitted by the user equipment to the base station, and the CSI report only includes the location information.
  • the location information is included in the RS transmitted by the user equipment to the base station.
  • the parameters of the RIS can be adaptively adjusted according to the location of the user, so as to reduce near-field performance loss and enhance signal gain.
  • each functional block is not particularly limited. That is, each functional block may be realized by one device that is physically and/or logically combined, or two or more devices that are physically and/or logically separated may be directly and/or indirectly (e.g. By wired and/or wireless) connections and thus by the various means described above.
  • FIG. 10 is a schematic diagram of a hardware structure of a related device 1000 (electronic device) according to an embodiment of the present disclosure.
  • the aforementioned device 1000 (first network element) can be configured as a computer device physically including a processor 1010, a memory 1020, a storage 1030, a communication device 1040, an input device 1050, an output device 1060, a bus 1070, and the like.
  • the word “device” may be replaced with a circuit, a device, a unit, or the like.
  • the hardware structure of the electronic device may include one or more of the devices shown in the figure, or may not include part of the devices.
  • processor 1010 For example, only one processor 1010 is shown in the figure, but there may be multiple processors. In addition, processing may be performed by one processor, or may be performed by more than one processor simultaneously, sequentially, or in other ways. In addition, the processor 1010 may be implemented by more than one chip.
  • Each function of the device 1000 is realized, for example, by reading predetermined software (program) into hardware such as the processor 1010 and the memory 1020, so that the processor 1010 performs calculations and controls communication by the communication device 1040. , and control the reading and/or writing of data in the memory 1020 and the storage 1030 .
  • predetermined software program
  • the processor 1010 operates, for example, an operating system to control the entire computer.
  • the processor 1010 may be composed of a central processing unit (CPU, Central Processing Unit) including an interface with peripheral devices, a control device, a computing device, registers, and the like.
  • CPU Central Processing Unit
  • control unit and the like may be implemented by the processor 1010 .
  • the processor 1010 reads programs (program codes), software modules, data, and the like from the memory 1030 and/or the communication device 1040 to the memory 1020, and executes various processes based on them.
  • programs program codes
  • software modules software modules
  • data data
  • the like data
  • the program a program that causes a computer to execute at least part of the operations described in the above-mentioned embodiments can be used.
  • the processing unit of the first network element may be implemented by a control program stored in the memory 1020 and operated by the processor 1010, and other functional blocks may also be implemented in the same way.
  • the memory 1020 is a computer-readable recording medium, such as a read-only memory (ROM, Read Only Memory), a programmable read-only memory (EPROM, Erasable Programmable ROM), an electrically programmable read-only memory (EEPROM, Electrically EPROM), At least one of random access memory (RAM, Random Access Memory) and other appropriate storage media.
  • the memory 1020 may also be called a register, a cache, a main memory (main storage), or the like.
  • the memory 1020 can store executable programs (program codes), software modules, and the like for implementing the method according to an embodiment of the present disclosure.
  • the memory 1030 is a computer-readable recording medium, and can be composed of, for example, a flexible disk (flexible disk), a floppy (registered trademark) disk (floppy disk), a magneto-optical disk (for example, a CD-ROM (Compact Disc ROM), etc.), Digital Versatile Disc, Blu-ray (registered trademark) Disc), removable disk, hard drive, smart card, flash memory device (e.g., card, stick, key driver), magnetic stripe, database , a server, and at least one of other appropriate storage media.
  • the memory 1030 may also be called an auxiliary storage device.
  • the communication device 1040 is hardware (a transmission and reception device) for performing communication between computers via a wired and/or wireless network, and is also called a network device, a network controller, a network card, a communication module, and the like, for example.
  • the communication device 1040 may include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like.
  • the above-mentioned sending unit, receiving unit, etc. may be implemented by the communication device 1040 .
  • the input device 1050 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1060 is an output device that outputs to the outside (for example, a display, a speaker, a light emitting diode (LED, Light Emitting Diode) lamp, etc.).
  • the input device 1050 and the output device 1060 may also have an integrated structure (such as a touch panel).
  • bus 1070 for communicating information.
  • the bus 1070 may be composed of a single bus, or may be composed of different buses among devices.
  • electronic equipment can include microprocessors, digital signal processors (DSP, Digital Signal Processor), application specific integrated circuits (ASIC, Application Specific Integrated Circuit), programmable logic devices (PLD, Programmable Logic Device), field programmable gates Array (FPGA, Field Programmable Gate Array) and other hardware can be used to realize part or all of each function block.
  • DSP digital signal processors
  • ASIC Application Specific Integrated Circuit
  • PLD programmable logic devices
  • FPGA Field Programmable Gate Array
  • FPGA Field Programmable Gate Array
  • a channel and/or a symbol may also be a signal (signaling).
  • a signal can also be a message.
  • the reference signal can also be referred to as RS (Reference Signal) for short, and it can also be called Pilot (Pilot), pilot signal, etc. according to the applicable standard.
  • a component carrier CC, Component Carrier
  • CC Component Carrier
  • information, parameters, and the like described in this specification may be expressed by absolute values, relative values to predetermined values, or other corresponding information.
  • radio resources may be indicated by a specified index.
  • formulas and the like using these parameters may also be different from those explicitly disclosed in this specification.
  • the information, signals, etc. described in this specification may be represented using any of a variety of different technologies.
  • the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be mentioned in the above descriptions may be transmitted through voltage, current, electromagnetic wave, magnetic field or magnetic particles, light field or photons, or any of them. combination to represent.
  • information, signals, etc. may be output from upper layers to lower layers, and/or from lower layers to upper layers.
  • Information, signals, etc. may be input or output via a plurality of network nodes.
  • Input or output information, signals, etc. can be stored in a specific location (such as memory), or can be managed through a management table. Imported or exported information, signals, etc. may be overwritten, updated or supplemented. Outputted information, signals, etc. can be deleted. Inputted information, signals, etc. may be sent to other devices.
  • Notification of information is not limited to the modes/embodiments described in this specification, and may be performed by other methods.
  • the notification of information may be through physical layer signaling (for example, downlink control information (DCI, Downlink Control Information), uplink control information (UCI, Uplink Control Information)), upper layer signaling (for example, radio resource control (RRC, Radio Resource Control) signaling, broadcast information (MIB, Master Information Block, System Information Block (SIB, System Information Block), etc.), media access control (MAC, Medium Access Control) signaling ), other signals, or a combination of them.
  • DCI downlink control information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may also be called L1/L2 (Layer 1/Layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may also be called an RRC message, such as an RRC Connection Setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, and the like.
  • the MAC signaling can be notified by, for example, a MAC control element (MAC CE (Control Element)).
  • notification of prescribed information is not limited to being performed explicitly, but may be performed implicitly (eg, by not notifying the prescribed information or by notifying other information).
  • judgment it can be performed by a value (0 or 1) represented by 1 bit, or by a true or false value (Boolean value) represented by true (true) or false (false), or by comparison of numerical values (such as a comparison with a specified value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, shall be construed broadly to mean commands, command sets, code, code segments, program code, programs, Program, software module, application, software application, software package, routine, subroutine, object, executable, thread of execution, step, function, etc.
  • software, commands, information, etc. may be sent or received via transmission media.
  • transmission media For example, when sending from a website, server, or other remote source using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL, Digital Subscriber Line), etc.) and/or wireless technology (infrared, microwave, etc.)
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL, Digital Subscriber Line), etc.
  • wireless technology infrared, microwave, etc.
  • system and "network” used in this specification are used interchangeably.
  • base station BS, Base Station
  • radio base station eNB
  • gNB gNodeB
  • cell gNodeB
  • cell group femtocell
  • carrier femtocell
  • a base station may house one or more (eg three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be connected by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH, RRH, Remote Radio Head)) to provide communication services.
  • a base station subsystem for example, a small base station for indoor use (Remote Radio Head (RRH, RRH, Remote Radio Head)
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of a base station and/or a base station subsystem that provides communication services in the coverage.
  • mobile station MS, Mobile Station
  • user terminal user terminal
  • UE User Equipment
  • terminal mobile station
  • a mobile station is also sometimes referred to by those skilled in the art as subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.
  • radio base stations in this specification may be replaced by user terminals.
  • each mode/embodiment of the present disclosure may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between multiple user terminals (D2D, Device-to-Device).
  • D2D Device-to-Device
  • the above-mentioned functions of the electronic device may be regarded as functions of the user terminal.
  • words like "up” and “down” can be replaced with "side”.
  • uplink channels can also be replaced by side channels.
  • the user terminal in this specification can also be replaced by a wireless base station.
  • the above-mentioned functions of the user terminal may be regarded as functions of the first communication device or the second communication device.
  • a specific operation performed by a base station may also be performed by an upper node (upper node) in some cases.
  • various actions for communication with the terminal can be performed through the base station or one or more networks other than the base station.
  • Nodes such as Mobility Management Entity (MME, Mobility Management Entity), Serving-Gateway (S-GW, Serving-Gateway) can be considered, but not limited to this), or their combination.
  • LTE Long-term evolution
  • LTE-A Long-term evolution
  • LTE-B Long-term evolution
  • LTE-Beyond Super 3rd generation mobile communication system
  • IMT-Advanced 4th generation mobile communication system
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • FAA Future Radio Access
  • New-RAT Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Future generation radio access
  • GSM Global System for Mobile Communications
  • CDMA3000 Code Division Multiple Access 3000
  • UMB Ultra Mobile Broadband
  • IEEE 920.11 Wi-Fi (registered trademark)
  • IEEE 920.16 WiMA
  • any reference to an element using designations such as “first”, “second”, etc. used in this specification does not limit the quantity or order of these elements comprehensively. These designations may be used in this specification as a convenient method of distinguishing between two or more units. Thus, a reference to a first unit and a second unit does not mean that only two units may be used or that the first unit must precede the second unit in some fashion.
  • determining (determining) used in this specification may include various actions. For example, regarding “judgment (determination)”, calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up) (such as tables, databases, or other Searching in the data structure), ascertaining (ascertaining) and the like are regarded as performing "judgment (determination)”. In addition, regarding “judgment (determination)”, receiving (receiving) (such as receiving information), transmitting (transmitting) (such as sending information), input (input), output (output), accessing (accessing) (such as access to data in the internal memory), etc., are deemed to be "judgment (determination)”.
  • judgment (determination) resolving (resolving), selecting (selecting), selecting (choosing), establishing (establishing), comparing (comparing), etc. can also be regarded as performing "judgment (determination)”. That is, regarding "judgment (determination)", several actions can be regarded as making "judgment (determination)”.
  • connection refers to any direct or indirect connection or combination between two or more units, which can be Including the following cases: between two units that are “connected” or “combined” with each other, there is one or more intermediate units.
  • the combination or connection between units may be physical or logical, or a combination of both. For example, "connect” could also be replaced with "access”.
  • two units may be considered to be connected by the use of one or more wires, cables, and/or printed electrical connections, and, as several non-limiting and non-exhaustive examples, by the use of , the microwave region, and/or the electromagnetic energy of the wavelength of the light (both visible light and invisible light) region, etc., are “connected” or “combined” with each other.

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Abstract

本公开提供一种基站。该基站包括：控制单元，被配置为基于用户装置的位置，确定关于可重构表面装置的配置信息；以及发送单元，被配置为向所述可重构表面装置发送所述配置信息，以使得所述可重构表面装置基于所述配置信息确定所述可重构表面装置所使用的码本。

Description

可重构表面装置、基站和用户装置 技术领域
本公开涉及无线通信领域，并且更具体地涉及一种可重构表面装置、基站和用户装置。
背景技术
在未来的通信系统中，需要使得高速率网络能够覆盖各种区域。然而，涉及毫米波及更高频段无线系统的覆盖能力较差，需要进一步改进以满足未来通信系统的要求。
可重构智能表面(reconfigurable intelligent surface，RIS)技术为解决高速率室外覆盖问题提供了一种潜在性能好、容易部署的方案。具体来讲，RIS能够收集信号发送端发送的信号并将这些信号通过波束成形发送至信号接收端。RIS具有低成本、低功耗的特点，为解决移动通信系统的覆盖和容量问题提供了全新的可能性。
然而，为达到高速率室外覆盖，通常需要较大面积的RIS面板(如1米x1米)，导致大量用户可能位于RIS的近场范围内。而因为传统波束成形方案仅针对远场信号的传输设计，近场性能不佳。
为此，提出了多种方案以改进在RIS的近场性能。然而这些方案往往涉及难以获取的信息、近场性能损失较大、鲁棒性差、应用难度大等问题。因此，需要对RIS进行进一步的改进以提高RIS的性能。
发明内容
根据本公开的一个方面，提供了一种基站。该基站包括：控制单元，被配置为基于用户装置的位置，确定关于可重构表面装置的配置信息；以及发送单元，被配置为向所述可重构表面装置发送所述配置信息，以使得所述可重构表面装置基于所述配置信息确定所述可重构表面装置所使用的码本。
例如，所述配置信息还包括以下各项中的至少一项：与所述可重构表面装置的工作模式相关联的信息、与所述可重构表面装置的默认码本相关联 的信息、与所述可重构表面装置使用码本的方式相关联的信息。
例如，所述发送单元还被配置为：向所述可重构表面装置发送控制信息，所述控制信息包括与所述码本相关联的码字所对应的时间段的信息。
例如，所述发送单元还被配置为：通过IP接口或Xn接口向所述可重构表面装置发送所述配置信息；或者通过无线接口向所述可重构表面装置发送所述配置信息。
根据本公开的另一方面，提供了一种可重构表面装置。所述可重构表面装置还包括发送单元，所述发送单元还被配置为向基站反馈配置应答消息，所述配置应答消息指示配置成功或者配置失败。
例如，所述发送单元还被配置为：在RRC过程中向基站上报与所述可重构表面装置的类型相关的信息，在所述可重构表面装置是基站类型的情况下，向所述用户装置发送初始接入所需的信息。例如，初始接入所需的信息可以包括同步信息和广播信道信息，如SSB消息、必要的系统信息(SIB)、以及RACH配置和RACH消息等。
例如，所述用户装置的位置相关联的配置信息是通过下行信道，例如DL-SCH接收的，所述配置应答消息是通过上行信道，例如UL-SCH发送的。
根据本公开的另一方面，提供了一种用户装置。所述用户装置包括：控制单元，被配置为获取所述用户装置的位置信息；发送单元，被配置为向基站发送位置信息；接收单元，被配置为接收所述用户装置特定的消息，其中，所述用户装置特定的消息由所述基站发射至可重构表面装置，并由所述可重构表面装置反射/透射至所述用户装置。
例如，所述位置信息被包括在所述用户装置向所述基站传输的CSI报告中，所述CSI报告为周期性的CSI报告、半周期性的CSI报告或半静态CSI报告中的至少一项。可替换地，所述位置信息被包括在所述用户装置向所述基站传输的CSI报告中，所述CSI报告仅包括所述位置信息。可替换地，所述位置信息被包括在所述用户装置向所述基站传输的RS中。
在根据本公开的示例中，通过基于用户位置的自适应波束成形方案，根据用户位置自适应调整RIS的参数，减少近场性能损失并增强信号增益。
附图说明
通过结合附图对本公开实施例进行更详细的描述，本公开的上述以及其它目的、特征和优势将变得更加明显。附图用来提供对本公开实施例的进一步理解，并且构成说明书的一部分，与本公开实施例一起用于解释本公开，并不构成对本公开的限制。在附图中，相同的参考标号通常代表相同部件或步骤。
图1示出了可在其中应用本公开实施例的无线通信系统的示意图。
图2是示出根据本公开一个实施例的基站的示意性框图。
图3是示出根据本公开一个实施例的可重构表面装置的示意性框图。
图4A是示出根据本公开实施例的可重构表面装置的可重构面板的一种阵元状态的示例图。
图4B是示出根据本公开实施例的可重构表面装置的可重构面板的另一种阵元状态的示例图。
图5是示出根据本公开实施例的可重构表面装置的可重构面板的阵元状态的又一示例图。
图6是示出根据本公开实施例的可重构表面装置的可重构面板的阵元状态的又一示例图。
图7是示出根据本公开一个实施例的用户装置的示意性框图。
图8A是示出根据本公开一个实施例的初始接入流程和RIS波束选择和传输流程的示例图。
图8B是示出根据本公开一个实施例的用户装置类型的可重构表面装置在通信系统中的信令交互的示例图。
图8C是示出根据本公开一个实施例的基站类型的可重构表面装置在通信系统中的信令交互的示例图。
图9A是示出根据本公开一个实施例的由基站执行的方法的示例流程图。
图9B是示出根据本公开一个实施例的由可重构表面装置执行的方法的示例流程图。
图9C是示出根据本公开一个实施例的由用户装置执行的方法的示例流程图。
图10是根据本公开的实施例的所涉及的设备的硬件结构的示意图。
具体实施方式
为了使得本公开的目的、技术方案和优点更为明显，下面将参照附图详细描述根据本公开的示例实施例。在附图中，相同的参考标号自始至终表示相同的元件。应当理解，这里所描述的实施例仅仅是说明性的，而不应被解释为限制本公开的范围。
本公开涉及以下术语，大型智能表面(Large intelligent surface)、智能反射表面(intelligent reflecting surface)、可重构智能表面(reconfigurable intelligent surface)、被动式智能表面(passive intelligent surface)、可重构元表面(reconfigurable metasurface)、软定义表面(software defined surface)、软定义元表面(software defined metasurface)、大型智能元表面(large intelligent metasurface)、智能反射阵列(smart reflect array)等。
首先，参照图1来描述可在其中应用本公开实施例的通信系统。图1示出了可在其中应用本公开实施例的通信系统100的示意图。在图1所示的通信系统100可以是5G通信网或6G通信网，也可以是任何其他类型的无线通信网络，比如4G通信网等。在下文中，以6G通信网为例来描述本公开的实施例，但应当认识到，以下描述也可以适用于其他类型的无线通信网。
通信系统100可以包括6G通信网中的基站、可重构表面装置、以及用户终端。如图1所示，基站与用户终端之间的通信可能因障碍物的存在而导致信道质量不佳。此时，可重构表面装置可以反射或透射环境中的无线信号。例如，针对下行信道，基站可以将要发送给用户装置的信息发送至可重构表面装置，然后可重构表面装置可以将该信息反射/透射至用户装置。又例如，针对上行信道，用户装置可以将要发送给基站的信息发送至可重构表面装置，然后可重构表面装置可以将该信息反射/透射至基站。由此，信息在传输过程中的路径损耗以及障碍物造成的不利影响可被减少。虽然在图1所示的示例中，以可重构表面装置通过波束成形向用户传输信息为例进行了描述，然而应当理解，本公开的方案也适用于基站直接向用户提供通信链路，从而直接与用户装置通信的情况。
图1所示的可重构表面装置既可以被动式可重构表面(Passive RIS)装 置也可以是主动式可重构表面(Active RIS)装置。例如，在可重构表面装置是被动式可重构表面装置的情况下，该可重构表面装置可以被部署在信道中以提高端到端(E2E)的信号质量。该部署在信道中的可重构表面装置可以补偿由反射/透射带来的路径损失，随着信道的时变调整RIS参数，辅助实现低延迟的全双工中继。在可重构表面装置是主动式可重构表面装置的情况下，该可重构表面装置可以被部署在发送端中以降低成本和功耗。由于新的元材料使得集成大量RIS元件以增加阵列增益成为可能，主动式可重构表面装置可以在没有传统的PSN和/或RF链的情况下控制无线电信号。
例如，目前已经提出了利用信道状态信息(CSI)来尝试解决当前的RIS技术中近场性能不佳的问题。具体地，在基站被提供有CSI的情况下，基站可以与该可重构表面装置共同确定基站和用户装置间的波束成形系数以及可重构表面装置与用户装置间的波束成形系数，然后基站可以通过RIS控制链路通知该可重构表面装置相关的波束成形配置。由于可重构表面装置目前尚不能实现基于导频测量的信道估计，因此目前的方案难以直接获取基站和可重构表面装置之间的信道质量信息、和/或可重构表面装置和用户装置之间的信道质量信息，从而实用性较低。
例如，目前还提出了利用基于DFT的传统波束码本来尝试解决上述问题。然而由于基于DFT的传统波束码本是针对远场用户而设计的，基于DFT的传统波束码本在近场性能损失较大。
例如，目前还提出了利用可重构表面装置进行近场聚焦来尝试解决当前RIS技术中近场性能不佳的问题。然而，该方案要求基于用户的准确位置，逐一调整RIS阵元相位，实现信号在用户处聚焦，因此存在波束对齐困难、鲁棒性差以及应用难度大的问题。
如上所述，目前的方案往往涉及难以获取的信息、近场性能损失较大、鲁棒性差、应用难度大。根据本公开的实施例，希望通过基于用户位置的自适应近场波束成形方案，根据用户位置自适应调整RIS的参数，减少近场性能损失并增强信号增益。
以下，参考图2来说明根据本公开的实施例的基站200。图2是示出根据本公开一个实施例的基站200的示意性框图。如图2所示，根据本公开一 个实施例的基站200可包括控制单元210和发送单元220。除了控制单元和发送单元，基站200还可以包括其他部件，然而，由于这些部件与本公开实施例的内容无关，因此在这里省略其图示和描述。
如图2所示，控制单元210可以被配置为基于用户装置的位置，确定关于可重构表面装置的配置信息。发送单元220可以被配置为向所述可重构表面装置发送所述配置信息，以使得所述可重构表面装置基于所述配置信息确定所述可重构表面装置所使用的码本。
例如，配置信息可以以显式或隐式的方式指示用户装置的位置。例如，配置信息可以包括用户装置的地理坐标(例如3D坐标)、或者用户装置距离可重构表面装置的距离、或者用户装置相对于可重构表面装置的方向等等。可选地，所述用户装置的位置可以是用户装置与可重构表面装置的相对位置。又例如，配置信息还可以以距离量化的方式指示用户装置的位置。具体地，配置信息可以以不同的比特指示用户装置是否处于可重构表面装置的近场范围内。例如，上述的近场范围可以根据通信系统的具体配置来确定。本领域技术人员应当理解本公开并不以此为限。
例如，所述可重构表面装置所使用的码本还可以基于量化后的参数来计算的。量化后的参数可以是经对数量化后的用户装置与可重构表面装置的距离。量化后的参数可以被打包成二进制向量，并用作码本的码字指示符。
例如，可重构表面装置所使用的码本与可重构面板的阵元状态相关联。可选地，可重构面板的阵元状态可以是可重构面板的子阵面积、子阵数量和子阵波束偏转等。举例来说，子阵面积与可重构面板的增益和近场范围呈正相关。子阵数量与可重构面板的增益也呈正相关。子阵波束偏转方式和方向与可重构面板的覆盖范围相关。因此，基于用户装置的位置信息来调节码本进而调节可重构面板的阵元状态将有利于减轻对近场用户装置的影响、增加信号增益、调节信号的覆盖范围。之后将参考图4至图6描述可重构表面装置如何基于配置信息(或用户装置的位置)来确定所述可重构表面装置所使用的码本，在此就不再赘述。
可选地，所述配置信息还可以包括以下各项中的至少一项：与所述可重构表面装置的工作模式相关联的信息、与所述可重构表面装置的码本相关联的信息、与所述可重构表面装置使用码本的方式相关联的信息。
例如，与所述可重构表面装置的工作模式相关联的信息可以指示所述可重构表面装置是动态操作的、静态操作的还是半静态操作的。或者，与所述可重构表面装置的工作模式相关联的信息还可以指示所述可重构表面装置是否改变其工作模式，例如从动态操作改变为静态操作/半静态操作，或者从静态操作/半静态操作改变为动态操作等等。例如，如果可重构表面装置是动态操作的，该可重构表面装置可以根据从基站或用户装置处接收到的动态码字切换消息来动态地调整其所使用的码字，以提高通信链路的质量。可替换地，在一些实施例中，该可重构表面装置还可以根据从基站或用户装置处接收到的动态码本切换消息来动态地调整其所使用的码本。本公开不对所述可重构表面装置的工作模式进行限制。
例如，与所述可重构表面装置的码本相关联的信息可以指示码本的量化分辨率(quantization resolution)。可选地，码本的量化分辨率可以与(对数)量化后的用户装置与可重构表面装置之间的距离相关联，本公开不对如何设计码本的量化分辨率进行限制。又例如，与所述可重构表面装置的码本相关联的信息还可以指示所述可重构表面装置所使用的默认码本。例如，默认码本可以是所述可重构表面装置所使用的初始码本。
例如，与所述可重构表面装置使用码本的方式相关联的信息可以指示如何使用默认码本。例如，在所述可重构表面装置没有接收到码本切换消息的情况下，基站可以利用配置信息指示所述可重构表面装置使用默认码本或继续使用最新使用的码本。此外，可替换地，与所述可重构表面装置使用码本的方式相关联的信息还可以指示如何使用默认码字。例如，在所述可重构表面装置没有接收到码字切换消息的情况下，基站可以利用配置信息指示所述可重构表面装置使用默认码字或继续使用最新使用的码字。
例如，所述发送单元还被配置为向所述可重构表面装置发送控制信息，所述控制信息包括与所述码本相关联的码字所对应的时间段的信息。可选地的，所述时间段是以时隙(slot)为单位的。本领域技术人员应当理解，所述时间段还可以以子帧、迷你时隙等为单位，本公开对此不进行限制的。可选地，所述控制信息可以指示所述可重构表面装置使用某个码字的时隙。可选地，所述控制信息还可以指示所述可重构表面装置在多个连续时隙中使用的码字序列。或者，所述控制信息还可以指示所述可重构表面装置使用某个码 字的起始时隙、终止时隙等。或者，所述控制信息还可以指示所述可重构表面装置使用某个码字每隔几个时隙就再次使用、或者直到接收到码字切换命令一直使用某个码字等等。
例如，所述发送单元还可以被配置为：通过Internet网络等有线IP网络接口或Xn等基站间接口向所述可重构表面装置发送所述配置信息(或控制信息)。或者，所述发送单元还可以被配置为：通过无线接口向所述可重构表面装置发送所述配置信息(或控制信息)。在该情况下，所述可重构表面装置可以被设置有与物联网用户端相关的模块，以通过空中接口接收上述的配置信息或控制信息。
此外，基站还可以向可重构表面装置发送用户装置相关的其它信息以便于可重构表面装置确定码本/码字，例如用户装置的移动速度、是否位于基站覆盖范围的边缘、用户装置附近是否存在其他用户装置等等，本公开对此并不进行限制。
由此，在上述根据本公开的示例中，通过基站向可重构表面装置发送与用户装置的位置相关的配置信息，可重构表面装置能够根据用户位置自适应地调整RIS的参数(例如，其使用的码本或码字)，从而能够减少近场性能损失并增强信号增益。
以下，参考图3来说明根据本公开的实施例的可重构表面装置300。图3是示出根据本公开一个实施例的可重构表面装置300的示意性框图。如图3所示，根据本公开一个实施例的可重构表面装置300可包括接收单元310、控制单元320和可重构面板330。除了接收单元、控制单元和可重构面板以外，可重构表面装置300还可以包括其他部件，在此不再赘述。
如图3所示，接收单元310，被配置为从基站接收用户装置的位置相关联的配置信息。控制单元320被配置为基于所述配置信息确定所述可重构表面装置所使用的码本，所述码本与可重构面板的阵元状态相关联。可重构面板330被配置为向所述用户装置反射/透射所述基站向所述用户装置发送的消息。
可选地，所述可重构表面装置还包括发送单元。所述发送单元可以被配置为向基站反馈配置应答消息，所述配置应答消息指示配置成功或者配置失败。可选地，该发送单元还可以被配置为在RRC过程中向基站上报与所述可 重构表面装置的类型相关的信息。例如，与所述可重构表面装置的类型相关的信息可以指示所述可重构表面装置是用户装置类型还是基站类型。不同类型的可重构表面装置可以对应于不同的信令交互流程和不同的信号传输接口。
例如，在所述可重构表面装置是基站类型的情况下，该发送单元还可以被配置为向所述用户装置发送针对所述用户装置的SSB消息、SIB消息、和RACH相关的消息。可选地，所述用户装置的位置相关联的配置信息可以通过下行信道，例如DL-SCH(下行共享信道)接收的，而所述配置应答消息可以通过上行信道，例如UL-SCH(上行共享信道)发送。之后将参考图8A至图8C描述相关消息的交互，在此就不再赘述。
可选地，可重构面板的阵元状态可以是可重构面板的子阵面积、子阵数量和子阵波束偏转等，从而调节可重构面板以使其能够减少近场性能损失、弥补通信链路中的路径损失、调整通信覆盖范围等。
以下参考图4A至图6来说明根据本公开的实施例的可重构表面装置300确定码本的方法。图4A是示出根据本公开实施例的可重构表面装置300的可重构面板的一种阵元状态的示例图。图4B是示出根据本公开实施例的可重构表面装置300的可重构面板的又一种阵元状态的示例图。图5是示出根据本公开实施例的可重构表面装置300的可重构面板的阵元状态的又一示例图。图6是示出根据本公开实施例的可重构表面装置300的可重构面板的阵元状态的再一示例图。
如上所述，可重构面板的阵元状态可以包括可重构面板的子阵划分方式以及子阵的波束偏转方式。以下参考图4A、图4B和图5来描述针对不同的用户装置的位置，可重构面板对应的子阵划分方式和子阵的波束偏转方式。
如图4A、图4B和图5所示，基于不同的用户装置的位置，可重构表面装置可以使用不同的码本/码字，并且可重构表面装置所使用的码本/码字与可重构表面装置的可重构面板的子阵划分方式以及子阵的波束偏转方式相关。可选地，可重构表面装置可以根据从基站接收用户装置的位置相关联的配置信息设置两层码本。其中，第一层码本涉及子阵面积、子阵数量和参考波束，第二层码本涉及波束偏转。也即，第一层码本是一种子阵内码本，第二层码本是一种子阵间码本。
具体地，可重构表面装置与用户装置之间距离越小，则可重构面板可被 划分为越小尺寸的子阵。可重构面板的子阵面积越小，则该可重构面板的子阵的近场范围越小，从而近场损失越小。
例如，参考图4A，在用户装置距离可重构面板较近的情况下，可重构表面装置的可重构面板可以被划分为16个子阵。此时每个子阵的面积较小，每个子阵所形成的近场范围也较小。在这种情况下，用户装置即使位于距离可重构面板较近的位置处，针对每个子阵而言，仍然处于子阵的远场。换言之，如果配置信息指示用户装置与可重构面板较近，可重构表面装置可以确定与可重构面板被划分为较小面积的子阵相对应的码本，以减少用户装置的近场影响。
图5给出了基于配置信息，该可重构表面装置从图4A中的16个子阵中选择5个子阵来服务该用户装置的示例。本领域技术人员应当理解，图5和图4A仅为示例，事实上，基于配置信息，可重构面板被划分为M个子阵，M个子阵中的N个子阵可以用于服务单个用户装置，其中，M为大于1的正整数，N为大于1且小于或等于M的正整数。可选地，可重构面板划分出的M个子阵中的每个子阵分别与特定波束对应。特定波束也可以是从对应的子阵发出的波束。
继续参考图5，该配置信息还可以指示用户装置相对于可重构面板的方向，因此第一层码本还可以包含每个子阵的参考波束相关的信息，对于每个子阵而言参考波束相同。
在一些情况下，为了提高信号增益，可重构表面装置可以通过设置第二层码本将M个子阵中的N个子阵各自的特定波束相对于参考波束进行偏转，以使得特定波束能够汇聚于用户装置处。图5给出了利用第二层码本将图4A中的16个子阵中的5个子阵的特定波束汇聚于用户装置处的示例。由此，可重构表面装置可以根据配置信息进一步确定第二层码本以配置每个子阵反射/透射的波束(也即每个子阵的特定波束)进行偏转。由于用户装置与每个子阵的中心点的连线相对于上述参考波束的方向都不同，每个子阵的特定波束的偏转方向也不同，因此根据配置信息所设置的第二层码本对于每个子阵可以是特定的，以使得每个子阵的波束在偏转后在用户装置处汇聚。
此外，参见图4B，在用户装置距离可重构面板较远的情况下，可重构表面装置的可重构面板可以被划分为4个子阵。每个子阵的面积较大，每个子 阵所形成的近场范围也较大。在这种情况下，即使用户装置仍处于可重构面板的近场范围内，用户装置也处于子阵的远场。换言之，如果配置信息指示用户装置与可重构面板较远，可重构表面装置可以确定与可重构面板被划分为较大面积的子阵相对应的码本。由于用户装置与可重构面板之间的距离较大，即使具有较大面积的子阵也不会对用户装置造成明显的近场影响。
下表1和下表2分别示出了在3GHz和30GHz的信号的情况下，可重构表面装置以瑞利距离为例的子阵近场范围与子阵面积之间的关系。
表1
子阵面积 0.5米*0.5米 1米*1米 5米*5米
3GHz信号的近场范围 2.5米 10米 250米
表2
子阵面积 0.25米*0.25米 0.5米*0.5米 1米*1米
30GHz信号的近场范围 6米 25米 100米
由此，可重构表面装置可以根据从基站接收用户装置的位置相关联的配置信息确定所述可重构表面装置所使用的码本，从而根据该码本调节可重构面板的阵元状态，例如，可重构面板的子阵面积、子阵数量和子阵波束偏转等。由此，可重构表面装置能够减少近场性能损失并增强信号增益。
可选地，如图6所示，可重构表面装置还可以进一步调整阵元状态来服务不同场景下的用户装置。
例如，参见示例一，配置信息还可以指示在用户装置位于基站覆盖范围的边缘，或者进一步指示当前用户装置的信号传输速率较低。在这样的情况下，可重构表面装置可以确定使用多个子阵来服务该用户装置，并且多个子阵的反射波束或透射波束可以聚焦于用户装置处以提高信号质量。如果用户装置与可重构表面装置之间的距离较近，还可以使用多个较小的子阵来服务该用户装置以进一步提高信号质量。
例如，参见示例二，配置信息还可以指示用户装置处于移动状态，或者在基站和用户装置之间的传输路径中存在遮挡。在这样的情况下，可重构表面装置也可以确定使用多个子阵来服务该用户装置，并且该多个子阵中的各个子阵的波束可以不聚焦于同一位置处，以使得可重构表面装置反射/透射的波束可以覆盖较大的范围，从而使得用户装置能够在该情况下鲁棒地接收到 稳定的信号。可选地，此时所确定的码本可以指示子阵的面积的尺寸为适中，以覆盖更大的范围。
例如，参见示例三，在存在基站-用户装置的通信链路和基站-可重构表面装置-用户装置的通信链路这两者的情况下，配置信息还可以指示基站-可重构表面装置-用户装置的通信链路为基站-用户装置的通信链路的补充/复用。在这种情况下，可重构表面装置也可以确定这样的码本，该码本指示选择中尺寸或小尺寸的子阵面积来增加复用增益。可选地，在这种情况下，也可以使用多个子阵来服务该用户装置。多个子阵所使用的码字/码本可以不同，以平衡基站-可重构表面装置通信路径和可重构表面装置-用户装置通信路径两者的信号增益，以增强信号增益。
例如，参见示例四，在同一个可重构表面装置服务多个用户装置的情况下，可以基于不同用户装置的位置为不同用户配置不同的子阵面积和子阵数量。此时，还可以采用正交复用(时分、或频分)波形或非正交(NOMA)波形来平衡各个用户装置之间的信号增益。
针对上述四个不同示例场景，可重构表面装置可以根据用户装置的位置相关联的配置信息来确定码本/码字。此外，可重构表面装置还可以根据用户装置的其它信息来确定码本/码字，例如用户装置的移动速度、是否位于基站覆盖范围的边缘、用户装置附近是否存在其他用户装置等等，本公开对此并不进行限制。
以下，参考图7来说明根据本公开的实施例的用户装置400。图7是示出根据本公开一个实施例的用户装置400的示意性框图。如图7所示，根据本公开一个实施例的可重构表面装置400可包括控制单元410、发送单元420和接收单元430。除了控制单元410、发送单元420和接收单元430以外，用户装置400还可以包括其他部件，在此不再赘述。
如图7所示，控制单元410，被配置为获取所述用户装置的位置信息。发送单元420被配置为向基站发送位置信息。接收单元430被配置为接收所述用户装置特定的消息。其中，所述用户装置特定的消息由所述基站发射至可重构表面装置，并由所述可重构表面装置反射/透射至所述用户装置。
如上所述，基站200需要基于用户装置400的位置，确定关于可重构表 面装置300的配置信息。为此提供一种增强的CSI包括以实现附加的用户装置400的位置上报，以便于基站200确定配置信息以及可重构表面装置300确定码本。
例如，所述位置信息可以被包括在所述用户装置向所述基站传输的CSI报告中，所述CSI报告为周期性的CSI报告、半周期性的CSI报告或半静态CSI报告中的至少一项。所述CSI报告还可以包括各种其他信息，例如，由用户装置检测得到的可重构表面装置和用户装置之间的信道质量信息等等，本公开对此不进行限制。
可替换地，还可以定义之中新型的CSI反馈报告。所述位置信息还可以被包括在所述用户装置向所述基站传输的CSI报告中，所述CSI报告仅包括所述位置信息。
可替换地，所述位置信息还可以被包括在所述用户装置向所述基站传输的RS(参考信号)中。例如，该参考信号用于基站测量/估计用户装置的位置。或者，该参考信号用于基站在可重构表面装置300的辅助下测量/估计用户装置的位置。
由此，通过根据本公开的实施例的用户装置400，基站200能够便捷地获取用户装置400的位置信息，以实现后续的配置信息和/或码本的确定。
以下，参考图8A至图8C来说明根据本公开的实施例的通信系统中的基站、可重构表面装置和用户装置的示例交互过程。图8A是示出根据本公开一个实施例的初始接入流程和RIS波束选择和传输流程的示例图。图8B是示出根据本公开一个实施例的用户装置类型的可重构表面装置300在通信系统100中的信令交互的示例图。图8C是示出根据本公开一个实施例的基站类型的可重构表面装置300在通信系统100中的信令交互的示例图。
如图8A所示，在初始接入流程中，基站200的发送模块220可以向可重构表面装置300通过Uu链路或其他链路发送配置信息。此处配置信息可以是非用户装置特定的配置信息，其可选地包括与可重构表面装置300的工作模式相关联的信息、与可重构表面装置300的码本相关联的信息、与可重构表面装置300使用码本的方式相关联的信息等等。当然，此处的配置信息也可以是用户装置特定的配置信息，本公开并不以此为限。
接着，可重构表面装置300的发送单元还被配置为向基站200反馈配置应答消息(ACK)，所述配置应答消息指示配置成功或者配置失败。在基站200接收到配置应答消息后，基站200可以向可重构表面装置300传输SSB或SSB1信息，然后可重构表面装置300可以将该SSB或SSB1信息反射/透射至用户装置400。可选地，基站200还可以通过其与用户装置400之间的其它通信链路发送其它的SIB信息，例如，基站200可以通过广播的方式发送这些SIB信息。
此后，基站200和用户装置400将完成初始接入流程中的RACH过程，并可选地进行RRC过程。由此，可重构表面装置300和用户装置400初始接入基站200的过程完成，三者可以通过所建立的通信链路进行通信。
在初始接入流程完成之后，可以进行后续的数据传输流程。具体地，在一些情况下，用户装置400可能在基站200所覆盖的区域中移动，或者位于可重构表面装置300的近场范围内。可重构表面装置300在初始接入流程中配置的码本和/或码字可能需要进一步调整，以提高信号增益和近场性能。
在基站200和用户装置400在初始接入过程结束后，基站200可选地可以利用RRC配置过程对用户装置400进行进一步配置。例如，如果用户装置400和基站200之间的通信链路中存在障碍物并需要通过可重构表面装置300进行进一步信号增强，那么基站300可以配置用户装置400进行位置信息的上报。在图8A，基站300配置用户装置400通过增强的CSI报告来上报用户装置的位置。可选地，该增强的CSI报告中仅包括用户装置的位置。当然基站300还可以配置用户装置400以其他的方式上报用户位置。例如，基站还可以配置用户装置400进行周期性的CSI报告、半周期性的CSI报告或半静态CSI报告等等，或者配置用户装置400发送用于测量用户装置的位置的参考消息等等。本公开并不以此为限。
在基站200接收到具有用户装置位置信息的增强CSI报告后，基站200可以以图2描述的方式，向可重构表面装置300发送用户装置400特定的配置信息和控制信息。例如，用户装置400特定的配置信息和控制信息可以是通过UU链路或者其他链路发送的。可选地，可重构表面装置300还可以通过DL-SCH接收该用户装置的位置相关联的配置信息。可选地，可重构表面装置300还可以通过UL-SCH发送配置应答消息。
之后，基站200可以向可重构表面装置300发送用户装置400特定的数据，可重构表面装置300可以利用其的可重构面板330反射/透射该用户装置400特定的数据。可选地，如果用户装置400的位置改变，基站200可以向可重构表面装置300发送码字切换命令以使得可重构表面装置300调整可重构面板330的阵元状态。
可选地，可重构表面装置300的发送单元还被配置为在RRC过程中向基站上报与可重构表面装置的类型相关的信息。可选地，该与可重构表面装置的类型相关的信息可以指示可重构表面装置的类型是基站类型还是用户装置类型。以下参考图8B来说明用户装置类型的可重构表面装置300在通信系统100中的信令交互过程，参考图8C来说明基站类型的可重构表面装置300在通信系统100中的信令交互过程。
参考图8B，可重构表面装置300中的接收单元310、控制单元320和发送单元的组合被绘制成控制器。该控制器在RRC过程中用于与基站侧进行交互。图8B中的控制器可以被看作一种新型的用户侧节点。图8B中绘制的与RIS相关的SSB和SIB1信息以及其它SIB信息的传输、RACH过程和RRC过程与图8A中的初始接入流程中对应的传输过程类似，在此就不再赘述。
在初始接入流程结束后，基站200将与用户装置400的位置相关联的配置信息通过DL-SCH传输至可重构表面装置300。控制器中的接收单元310接收该配置信息。控制器中的控制单元320根据该配置信息，确定可重构面板330使用的码本，或者在默认码本中选取合适的码字，并据此配置可重构面板330。
接着，控制器中的发送单元通过UL-SCH发送配置应答信息，其指示配置成功或者配置失败。之后，可重构面板330将来自基站的各种信息反射/透射至用户装置400。这些信息包括针对所述用户装置的SSB消息、SIB消息、RACH过程相关的消息、RRC过程相关消息等等。
参考图8C，可重构表面装置300中的接收单元310、控制单元320和发送单元的组合被绘制成控制器。该控制器在RRC过程中用于与基站侧进行交互。图8C中的控制器可以被看作一种新型的基站侧节点，例如，一种新型的集成无线接入和回传(IAB)节点。通常情况下，IAB节点可以用于处理和传输各种类型的消息和信息，例如，SSB相关消息、SIB1相关消息、其它SIB消 息、RACH过程相关消息和RRC过程相关消息等等。而图8C中的控制器可以仅用于处理SSB过程和RACH过程相关消息。因此更进一步地，图8C中的控制器可以被看作一种简化的IAB节点。当然，图8C中的控制器还可以处理其它过程相关消息，本公开对此不进行限制。
图8C中绘制的与RIS相关的SSB和SIB1信息以及其它SIB信息的传输、RACH过程和RRC过程与图8A中的初始接入流程中对应的传输过程类似，在此就不再赘述。在初始接入流程结束后，基站200将与用户装置400的位置相关联的配置信息通过DL-SCH传输至可重构表面装置300。控制器中的接收单元310接收该配置信息。控制器中的控制单元320根据该配置信息，确定可重构面板330使用的码本，或者在默认码本中选取合适的码字，并据此配置可重构面板330。
接着，控制器中的发送单元通过UL-SCH发送配置应答信息，其指示配置成功或者配置失败。之后，控制器可以将向所述用户装置发送初始接入所需的信息。例如，初始接入所需的信息可以包括同步信息和广播信道信息，如SSB消息、必要的系统信息(SIB)消息、以及RACH配置和RACH消息等。可重构面板330可以将上述消息等等反射/透射至用户装置。
由此，根据本公开的实施例，能够通过基于用户位置的自适应近场波束成形方案，根据用户位置自适应调整RIS的参数，减少近场性能损失并增强信号增益。
下面，参照图9A至图9C来描述根据本公开实施例的各种方法。
图9A是根据本公开的一个实施例的由基站执行的方法9000的流程图。由于由基站执行的方法9000的步骤与上文参照图描述的基站200的操作对应，因此在这里为了简单起见，省略对相同内容的详细描述。
如图9A所示，在步骤S9001中，基站基于用户装置的位置，确定关于可重构表面装置的配置信息。然后步骤S9002中，基站向所述可重构表面装置发送所述配置信息，以使得所述可重构表面装置基于所述配置信息确定所述可重构表面装置所使用的码本。例如，该基站还可以向所述可重构表面装置发送控制信息，所述控制信息包括与所述码本相关联的码字所对应的时间段的信息。
例如，所述配置信息还包括以下各项中的至少一项：与所述可重构表面装置的工作模式相关联的信息、与所述可重构表面装置的码本相关联的信息、与所述可重构表面装置使用码本的方式相关联的信息。例如，可以通过I P接口或Xn接口向所述可重构表面装置发送所述配置信息，或者可以通过无线接口向所述可重构表面装置发送所述配置信息。
图9B是根据本公开的一个实施例的由可重构表面装置执行的方法9010的流程图。由于由可重构表面装置执行的方法9010的步骤与上文参照图描述的可重构表面装置300的操作对应，因此在这里为了简单起见，省略对相同内容的详细描述。
如图9B所示，在步骤S9011中，可重构表面装置从基站接收用户装置的位置相关联的配置信息。然后在步骤S9012中，基于所述配置信息确定所述可重构表面装置所使用的码本，所述码本与可重构面板的阵元状态相关联。接着，在步骤S9013中，所述用户装置反射/透射所述基站向所述用户装置发送的消息。
例如，可重构表面装置还向基站反馈配置应答消息，所述配置应答消息指示配置成功或者配置失败。可选地，可重构表面装置还在RRC过程中向基站上报与所述可重构表面装置的类型相关的信息。在所述可重构表面装置是基站类型的情况下，可重构表面装置向所述用户装置发送针对所述用户装置的SSB消息、SIB消息、和RACH相关的消息。可选地，所述用户装置的位置相关联的配置信息是通过DL-SCH接收的，所述配置应答消息是通过UL-SCH发送的。
图9C是根据本公开的一个实施例的由用户装置执行的方法9020的流程图。由于由可重构表面装置执行的方法9020的步骤与上文参照图描述的用户装置400的操作对应，因此在这里为了简单起见，省略对相同内容的详细描述。
如图9C所示，在步骤S9021中，用户装置获取所述用户装置的位置信息。然后在步骤S9022中，向基站发送位置信息。接着，在步骤S9023中，接收所述用户装置特定的消息。其中，所述用户装置特定的消息由所述基站发射至可重构表面装置，并由所述可重构表面装置反射/透射至所述用户装置。
例如，所述位置信息被包括在所述用户装置向所述基站传输的CSI报告 中，所述CSI报告为周期性的CSI报告、半周期性的CSI报告或半静态CSI报告中的至少一项。或者，所述位置信息被包括在所述用户装置向所述基站传输的CSI报告中，所述CSI报告仅包括所述位置信息。或者，所述位置信息被包括在所述用户装置向所述基站传输的RS中。
在以上结合图9A至图9C描述的各种方法中，可以根据用户位置自适应调整RIS的参数，减少近场性能损失并增强信号增益。
<硬件结构>
另外，上述实施方式的说明中使用的框图示出了以功能为单位的块。这些功能块(结构单元)通过硬件和/或软件的任意组合来实现。此外，各功能块的实现手段并不特别限定。即，各功能块可以通过在物理上和/或逻辑上相结合的一个装置来实现，也可以将在物理上和/或逻辑上相分离的两个以上装置直接地和/或间接地(例如通过有线和/或无线)连接从而通过上述多个装置来实现。
例如，本公开的一个实施例的电子设备可以作为执行本公开的信息发送方法的处理的计算机来发挥功能。图10是根据本公开的实施例的所涉及的设备1000(电子设备)的硬件结构的示意图。上述的设备1000(第一网络元件)可以作为在物理上包括处理器1010、内存1020、存储器1030、通信装置1040、输入装置1050、输出装置1060、总线1070等的计算机装置来构成。
另外，在以下的说明中，“装置”这样的文字也可替换为电路、设备、单元等。电子设备的硬件结构可以包括一个或多个图中所示的各装置，也可以不包括部分装置。
例如，处理器1010仅图示出一个，但也可以为多个处理器。此外，可以通过一个处理器来执行处理，也可以通过一个以上的处理器同时、依次、或采用其它方法来执行处理。另外，处理器1010可以通过一个以上的芯片来安装。
设备1000的各功能例如通过如下方式实现：通过将规定的软件(程序)读入到处理器1010、内存1020等硬件上，从而使处理器1010进行运算，对由通信装置1040进行的通信进行控制，并对内存1020和存储器1030中的数据的读出和/或写入进行控制。
处理器1010例如使操作系统进行工作从而对计算机整体进行控制。处理器1010可以由包括与周边装置的接口、控制装置、运算装置、寄存器等的中央处理器(CPU，Central Processing Unit)构成。例如，上述的控制单元等可以通过处理器1010实现。
此外，处理器1010将程序(程序代码)、软件模块、数据等从存储器1030和/或通信装置1040读出到内存1020，并根据它们执行各种处理。作为程序，可以采用使计算机执行在上述实施方式中说明的动作中的至少一部分的程序。例如，第一网络元件的处理单元可以通过保存在内存1020中并通过处理器1010来工作的控制程序来实现，对于其它功能块，也可以同样地来实现。
内存1020是计算机可读取记录介质，例如可以由只读存储器(ROM，Read Only Memory)、可编程只读存储器(EPROM，Erasable Programmable ROM)、电可编程只读存储器(EEPROM，Electrically EPROM)、随机存取存储器(RAM，Random Access Memory)、其它适当的存储介质中的至少一个来构成。内存1020也可以称为寄存器、高速缓存、主存储器(主存储装置)等。内存1020可以保存用于实施本公开的一实施方式所涉及的方法的可执行程序(程序代码)、软件模块等。
存储器1030是计算机可读取记录介质，例如可以由软磁盘(flexible disk)、软(注册商标)盘(floppy disk)、磁光盘(例如，只读光盘(CD-ROM(Compact Disc ROM)等)、数字通用光盘、蓝光(Blu-ray，注册商标)光盘)、可移动磁盘、硬盘驱动器、智能卡、闪存设备(例如，卡、棒(stick)、密钥驱动器(key driver))、磁条、数据库、服务器、其它适当的存储介质中的至少一个来构成。存储器1030也可以称为辅助存储装置。
通信装置1040是用于通过有线和/或无线网络进行计算机间的通信的硬件(发送接收装置)，例如也称为网络设备、网络控制器、网卡、通信模块等。通信装置1040为了实现例如频分双工(FDD，Frequency Division Duplex)和/或时分双工(TDD，Time Division Duplex)，可以包括高频开关、双工器、滤波器、频率合成器等。例如，上述的发送单元、接收单元等可以通过通信装置1040来实现。
输入装置1050是接受来自外部的输入的输入设备(例如，键盘、鼠标、麦克风、开关、按钮、传感器等)。输出装置1060是实施向外部的输出的输 出设备(例如，显示器、扬声器、发光二极管(LED，Light Emitting Diode)灯等)。另外，输入装置1050和输出装置1060也可以为一体的结构(例如触控面板)。
此外，处理器1010、内存1020等各装置通过用于对信息进行通信的总线1070连接。总线1070可以由单一的总线构成，也可以由装置间不同的总线构成。
此外，电子设备可以包括微处理器、数字信号处理器(DSP，Digital Signal Processor)、专用集成电路(ASIC，Application Specific Integrated Circuit)、可编程逻辑器件(PLD，Programmable Logic Device)、现场可编程门阵列(FPGA，Field Programmable Gate Array)等硬件，可以通过该硬件来实现各功能块的部分或全部。例如，处理器1010可以通过这些硬件中的至少一个来安装。
(变形例)
另外，关于本说明书中说明的用语和/或对本说明书进行理解所需的用语，可以与具有相同或类似含义的用语进行互换。例如，信道和/或符号也可以为信号(信令)。此外，信号也可以为消息。参考信号也可以简称为RS(Reference Signal)，根据所适用的标准，也可以称为导频(Pilot)、导频信号等。此外，分量载波(CC，Component Carrier)也可以称为小区、频率载波、载波频率等。
此外，本说明书中说明的信息、参数等可以用绝对值来表示，也可以用与规定值的相对值来表示，还可以用对应的其它信息来表示。例如，无线资源可以通过规定的索引来指示。进一步地，使用这些参数的公式等也可以与本说明书中明确公开的不同。
在本说明书中用于参数等的名称在任何方面都并非限定性的。例如，各种各样的信道(物理上行链路控制信道(PUCCH，Physical Uplink Control Channel)、物理下行链路控制信道(PDCCH，Physical Downlink Control Channel)等)和信息单元可以通过任何适当的名称来识别，因此为这些各种各样的信道和信息单元所分配的各种各样的名称在任何方面都并非限定性的。
本说明书中说明的信息、信号等可以使用各种各样不同技术中的任意一种来表示。例如，在上述的全部说明中可能提及的数据、命令、指令、信息、 信号、比特、符号、芯片等可以通过电压、电流、电磁波、磁场或磁性粒子、光场或光子、或者它们的任意组合来表示。
此外，信息、信号等可以从上层向下层、和/或从下层向上层输出。信息、信号等可以经由多个网络节点进行输入或输出。
输入或输出的信息、信号等可以保存在特定的场所(例如内存)，也可以通过管理表进行管理。输入或输出的信息、信号等可以被覆盖、更新或补充。输出的信息、信号等可以被删除。输入的信息、信号等可以被发往其它装置。
信息的通知并不限于本说明书中说明的方式/实施方式，也可以通过其它方法进行。例如，信息的通知可以通过物理层信令(例如，下行链路控制信息(DCI，Downlink Control Information)、上行链路控制信息(UCI，Uplink Control Information))、上层信令(例如，无线资源控制(RRC，Radio Resource Control)信令、广播信息(主信息块(MIB，Master Information Block)、系统信息块(SIB，System Information Block)等)、媒体存取控制(MAC，Medium Access Control)信令)、其它信号或者它们的组合来实施。
另外，物理层信令也可以称为L1/L2(第1层/第2层)控制信息(L1/L2控制信号)、L1控制信息(L1控制信号)等。此外，RRC信令也可以称为RRC消息，例如可以为RRC连接建立(RRC Connection Setup)消息、RRC连接重设定(RRC Connection Reconfiguration)消息等。此外，MAC信令例如可以通过MAC控制单元(MAC CE(Control Element))来通知。
此外，规定信息的通知(例如，“为X”的通知)并不限于显式地进行，也可以隐式地(例如，通过不进行该规定信息的通知，或者通过其它信息的通知)进行。
关于判定，可以通过由1比特表示的值(0或1)来进行，也可以通过由真(true)或假(false)表示的真假值(布尔值)来进行，还可以通过数值的比较(例如与规定值的比较)来进行。
软件无论被称为软件、固件、中间件、微代码、硬件描述语言，还是以其它名称来称呼，都应宽泛地解释为是指命令、命令集、代码、代码段、程序代码、程序、子程序、软件模块、应用程序、软件应用程序、软件包、例程、子例程、对象、可执行文件、执行线程、步骤、功能等。
此外，软件、命令、信息等可以经由传输介质被发送或接收。例如，当使用有线技术(同轴电缆、光缆、双绞线、数字用户线路(DSL，Digital Subscriber Line)等)和/或无线技术(红外线、微波等)从网站、服务器、或其它远程资源发送软件时，这些有线技术和/或无线技术包括在传输介质的定义内。
本说明书中使用的“系统”和“网络”这样的用语可以互换使用。
在本说明书中，“基站(BS，Base Station)”、“无线基站”、“eNB”、“gNB”、“小区”、“扇区”、“小区组”、“载波”以及“分量载波”这样的用语可以互换使用。基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微小区、小小区等用语来称呼。
基站可以容纳一个或多个(例如三个)小区(也称为扇区)。当基站容纳多个小区时，基站的整个覆盖区域可以划分为多个更小的区域，每个更小的区域也可以通过基站子系统(例如，室内用小型基站(射频拉远头(RRH，Remote Radio Head)))来提供通信服务。“小区”或“扇区”这样的用语是指在该覆盖中进行通信服务的基站和/或基站子系统的覆盖区域的一部分或整体。
在本说明书中，“移动台(MS，Mobile Station)”、“用户终端(user terminal)”、“用户装置(UE，User Equipment)”以及“终端”这样的用语可以互换使用。移动台有时也被本领域技术人员以用户台、移动单元、用户单元、无线单元、远程单元、移动设备、无线设备、无线通信设备、远程设备、移动用户台、接入终端、移动终端、无线终端、远程终端、手持机、用户代理、移动客户端、客户端或者若干其它适当的用语来称呼。
此外，本说明书中的无线基站也可以用用户终端来替换。例如，对于将无线基站和用户终端间的通信替换为多个用户终端间(D2D，Device-to-Device)的通信的结构，也可以应用本公开的各方式/实施方式。此时，可以将上述的电子设备所具有的功能当作用户终端所具有的功能。此外，“上行”和“下行”等文字也可以替换为“侧”。例如，上行信道也可以替换为侧信道。
同样，本说明书中的用户终端也可以用无线基站来替换。此时，可以将上述的用户终端所具有的功能当作第一通信设备或第二通信设备所具有的功能。
在本说明书中，设为通过基站进行的特定动作根据情况有时也通过其上级节点(upper node)来进行。显然，在具有基站的由一个或多个网络节点(network nodes)构成的网络中，为了与终端间的通信而进行的各种各样的动作可以通过基站、除基站之外的一个以上的网络节点(可以考虑例如移动管理实体(MME，Mobility Management Entity)、服务网关(S-GW，Serving-Gateway)等，但不限于此)、或者它们的组合来进行。
本说明书中说明的各方式/实施方式可以单独使用，也可以组合使用，还可以在执行过程中进行切换来使用。此外，本说明书中说明的各方式/实施方式的处理步骤、序列、流程图等只要没有矛盾，就可以更换顺序。例如，关于本说明书中说明的方法，以示例性的顺序给出了各种各样的步骤单元，而并不限定于给出的特定顺序。
本说明书中说明的各方式/实施方式可以应用于利用长期演进(LTE，Long Term Evolution)、高级长期演进(LTE-A，LTE-Advanced)、超越长期演进(LTE-B，LTE-Beyond)、超级第3代移动通信系统(SUPER 3G)、高级国际移动通信(IMT-Advanced)、第4代移动通信系统(4G，4th generation mobile communication system)、第5代移动通信系统(5G，5th generation mobile communication system)、未来无线接入(FRA，Future Radio Access)、新无线接入技术(New-RAT，Radio Access Technology)、新无线(NR，New Radio)、新无线接入(NX，New radio access)、新一代无线接入(FX，Future generation radio access)、全球移动通信系统(GSM(注册商标)，Global System for Mobile communications)、码分多址接入3000(CDMA3000)、超级移动宽带(UMB，Ultra Mobile Broadband)、IEEE 920.11(Wi-Fi(注册商标))、IEEE 920.16(WiMAX(注册商标))、IEEE 920.20、超宽带(UWB，Ultra-WideBand)、蓝牙(Bluetooth(注册商标))、其它适当的无线通信方法的系统和/或基于它们而扩展的下一代系统。
本说明书中使用的“根据”这样的记载，只要未在其它段落中明确记载，则并不意味着“仅根据”。换言之，“根据”这样的记载是指“仅根据”和“至少根据”这两者。
本说明书中使用的对使用“第一”、“第二”等名称的单元的任何参照，均非全面限定这些单元的数量或顺序。这些名称可以作为区别两个以上单元的便利方法而在本说明书中使用。因此，第一单元和第二单元的参照并不意味着仅可采用两个单元或者第一单元必须以若干形式占先于第二单元。
本说明书中使用的“判断(确定)(determining)”这样的用语有时包含多种多样的动作。例如，关于“判断(确定)”，可以将计算(calculating)、推算(computing)、处理(processing)、推导(deriving)、调查(investigating)、搜索(looking up)(例如表、数据库、或其它数据结构中的搜索)、确认(ascertaining)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，也可以将接收(receiving)(例如接收信息)、发送(transmitting)(例如发送信息)、输入(input)、输出(output)、存取(accessing)(例如存取内存中的数据)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，还可以将解决(resolving)、选择(selecting)、选定(choosing)、建立(establishing)、比较(comparing)等视为是进行“判断(确定)”。也就是说，关于“判断(确定)”，可以将若干动作视为是进行“判断(确定)”。
本说明书中使用的“连接的(connected)”、“结合的(coupled)”这样的用语或者它们的任何变形是指两个或两个以上单元间的直接的或间接的任何连接或结合，可以包括以下情况：在相互“连接”或“结合”的两个单元间，存在一个或一个以上的中间单元。单元间的结合或连接可以是物理上的，也可以是逻辑上的，或者还可以是两者的组合。例如，“连接”也可以替换为“接入”。在本说明书中使用时，可以认为两个单元是通过使用一个或一个以上的电线、线缆、和/或印刷电气连接，以及作为若干非限定性且非穷尽性的示例，通过使用具有射频区域、微波区域、和/或光(可见光及不可见光这两者)区域的波长的电磁能等，被相互“连接”或“结合”。
在本说明书或权利要求书中使用“包括(including)”、“包含(comprising)”、以及它们的变形时，这些用语与用语“具备”同样是开 放式的。进一步地，在本说明书或权利要求书中使用的用语“或(or)”并非是异或。
以上对本公开进行了详细说明，但对于本领域技术人员而言，显然，本公开并非限定于本说明书中说明的实施方式。本公开在不脱离由权利要求书的记载所确定的本公开的宗旨和范围的前提下，可以作为修改和变更方式来实施。因此，本说明书的记载是以示例说明为目的，对本公开而言并非具有任何限制性的意义。

Claims (10)

  1. 一种基站，包括：
    控制单元，被配置为基于用户装置的位置，确定关于可重构表面装置的配置信息；以及
    发送单元，被配置为向所述可重构表面装置发送所述配置信息，以使得所述可重构表面装置基于所述配置信息确定所述可重构表面装置所使用的码本。
  2. 如权利要求1所述的基站，其中，所述配置信息还包括以下各项中的至少一项：与所述可重构表面装置的工作模式相关联的信息、与所述可重构表面装置的码本相关联的信息、与所述可重构表面装置使用码本的方式相关联的信息。
  3. 如权利要求1所述的基站，其中，所述发送单元还被配置为向所述可重构表面装置发送控制信息，所述控制信息包括与所述码本相关联的码字所对应的时间段的信息。
  4. 如权利要求1-3中的任意一项所述的基站，其中，所述发送单元还被配置为：
    通过IP接口或Xn接口向所述可重构表面装置发送所述配置信息；或者
    通过无线接口向所述可重构表面装置发送所述配置信息。
  5. 一种可重构表面装置，包括：
    接收单元，被配置为从基站接收用户装置的位置相关联的配置信息；
    控制单元，被配置为基于所述配置信息确定所述可重构表面装置所使用的码本，所述码本与可重构面板的阵元状态相关联；
    可重构面板，被配置为向所述用户装置反射或透射所述基站向所述用户装置发送的消息。
  6. 如权利要求5所述的可重构表面装置，其中，所述可重构表面装置还包括发送单元，所述发送单元还被配置为向基站反馈配置应答消息，所述配置应答消息指示配置成功或者配置失败。
  7. 如权利要求6所述的可重构表面装置，其中，所述发送单元还被配置为：
    在RRC过程中向基站上报与所述可重构表面装置的类型相关的信息，
    在所述可重构表面装置是基站类型的情况下，向所述用户装置发送初始接入所需的信息。
  8. 如权利要求6-7中任意一项所述的可重构表面装置，其中，所述用户装置的位置相关联的配置信息是通过下行信道接收的，所述配置应答消息是通过上行信道发送的。
  9. 一种用户装置，包括：
    控制单元，被配置为获取所述用户装置的位置信息；
    发送单元，被配置为向基站发送位置信息；
    接收单元，被配置为接收所述用户装置特定的消息，
    其中，所述用户装置特定的消息由所述基站发射至可重构表面装置，并由所述可重构表面装置反射或透射至所述用户装置。
  10. 如权利要求9所述的用户装置，其中，
    所述位置信息被包括在所述用户装置向所述基站传输的CSI报告中，所述CSI报告为周期性的CSI报告、半周期性的CSI报告或半静态CSI报告中的至少一项；或
    所述位置信息被包括在所述用户装置向所述基站传输的CSI报告中，所述CSI报告仅包括所述位置信息；或
    所述位置信息被包括在所述用户装置向所述基站传输的RS中。
PCT/CN2021/107861 2021-07-22 2021-07-22 可重构表面装置、基站和用户装置 WO2023000256A1 (zh)

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