Method, device and equipment for measuring downlink signal strength at far-end radio frequency unit level

Abstract

The embodiment of the invention provides a method, a device and equipment for measuring the downlink signal strength of a far-end radio frequency unit level, and relates to the technical field of wireless communication. The method comprises the following steps: under the condition that user equipment accesses a network, a base station configures a channel measurement reference signal and a non-periodic resource for channel state measurement for the user equipment; according to the deployment number of small radio remote units (pRRUs) of a target cell corresponding to the base station, generating a time-sharing sending rule of the pRRUs; under the condition that the user equipment completes network access, non-periodic resource measurement is triggered based on a preset period of sending a channel measurement reference signal, and a time-sharing sending rule is issued to each pRRU; and receiving a measurement result fed back by the user equipment, and matching to obtain a downlink signal strength measurement result corresponding to each pRRU based on the aperiodic resource and the time-sharing sending rule. According to the scheme provided by the invention, the problem of poor real-time performance of a pRRU polling measurement scheme in a time division mode in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, specifically to a method, apparatus, and device for measuring downlink signal strength at the remote radio frequency unit level. Background Technology

[0002] Existing technology utilizes the uplink sounding reference signal (SRS) channel and controls whether a small Pico Remote Radio Unit (pRRU) performs data measurement on the SRS symbol. At specific times, a single pRRU uplink signal measurement is completed, obtaining pRRU-level measurement results—that is, serial measurement via time-division multiplexing. However, the time required to complete one round of pRRU polling measurement using this time-division multiplexing method depends on the number of pRRU RF combiners. When the number of pRRU RF combiners is large, a single polling can take several seconds, resulting in poor real-time performance. Summary of the Invention

[0003] At least one embodiment of this application provides a method, apparatus, and device for measuring downlink signal strength at the remote radio frequency unit level, which addresses the problem of poor real-time performance in the time-division pRRU polling measurement scheme in the prior art.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a method for measuring downlink signal strength at the remote radio frequency unit level, including:

[0006] When a user equipment accesses the network, the base station configures a channel measurement reference signal and aperiodic resources for the user equipment to perform channel state measurement.

[0007] Based on the number of small radio remote units (pRRUs) deployed in the target cell corresponding to the base station, a time-division transmission rule for the pRRUs is generated.

[0008] When the user equipment completes network access, based on the preset period of the transmission channel measurement reference signal, aperiodic resource measurement is triggered, and the time-division transmission rule is sent to each pRRU;

[0009] The measurement results fed back by the user equipment are received through the uplink transmission channel. Based on the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules, the downlink signal strength measurement results corresponding to each pRRU are obtained.

[0010] Optionally, the aperiodic resource is an aperiodic channel state information-reference signal (CSI-RS) resource, and the aperiodic CSI-RS resource includes the configuration of non-zero power CSI-RS.

[0011] The aperiodic CSI-RS resource occupies a single symbol, which is the last symbol of slot zero in each preset duration radio frame, and adopts a single-port resource map with a preset resource density;

[0012] The measurement reporting configuration for the aperiodic CSI-RS resources is to associate the Channel Aware Reference Signal Resource Indicator (CRI) with the Reference Signal Received Power (RSRP).

[0013] Optionally, the time-division transmission rule is a polling transmission map, which is generated based on the number of pRRUs deployed in the target cell, and defines that only a single pRRU performs a transmission operation during each non-periodic resource transmission, while the remaining pRRUs perform a silent operation, with each pRRU corresponding to a transmission period of a radio frame.

[0014] Optionally, the operation that triggers aperiodic resource measurement includes:

[0015] At the time when the base station transmits aperiodic resources corresponding to each pRRU, it triggers aperiodic resource measurement through downlink control signaling; wherein, the user equipment reports the measurement results of the aperiodic resource measurement to the base station through the physical uplink shared channel.

[0016] Optionally, the step of distributing the time-division sending rules to each pRRU includes:

[0017] The time-division transmission rules are distributed to each pRRU using a preset interface format. The preset interface format includes parameters such as: an interface message identifier that represents the unique identifier of the interface message, a pRRU identifier that represents the unique identifier of the remote radio unit, and a polling time configuration sequence. The polling time configuration sequence is a multi-dimensional integer array, with array elements taking values ​​of 0 or 1, used to represent the transmission timing of the pRRU in the radio frame dimension.

[0018] Optionally, the measurement results fed back by the user equipment are received through the uplink transmission channel, and the downlink signal strength measurement results corresponding to each pRRU are obtained by matching the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules, including:

[0019] The base station receives the measurement results of aperiodic resources fed back by the user equipment through the Physical Uplink Shared Channel (PUSCH) and records the aperiodic resource trigger time corresponding to the measurement results.

[0020] Based on the aperiodic resource trigger time, the time-division transmission rule is retrieved, and the sending end pRRU corresponding to the aperiodic resource trigger time is located.

[0021] The measurement results are correlated with the transmitting end pRRU to obtain the downlink signal strength measurement results corresponding to the transmitting end pRRU.

[0022] Secondly, embodiments of this application provide an apparatus for measuring downlink signal strength at the remote radio frequency unit level, comprising:

[0023] The first processing module is configured by the base station to configure channel measurement reference signals and aperiodic resources for channel state measurement for the user equipment when the user equipment accesses the network.

[0024] The second processing module is used to generate time-division transmission rules for pRRUs based on the number of small radio remote units (pRRUs) deployed in the target cell corresponding to the base station.

[0025] The third processing module is used to trigger aperiodic resource measurement based on a preset period of the transmission channel measurement reference signal when the user equipment completes network access, and to send the time-division transmission rule to each pRRU.

[0026] The fourth processing module is used to receive the measurement results fed back by the user equipment through the uplink transmission channel, and to match and obtain the downlink signal strength measurement results corresponding to each pRRU based on the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules.

[0027] Thirdly, embodiments of this application provide a network device, including: a memory, a transceiver, and a processor.

[0028] A memory for storing computer programs; a transceiver for receiving and sending data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0029] When a user equipment accesses the network, the base station configures a channel measurement reference signal and aperiodic resources for the user equipment to perform channel state measurement.

[0030] Based on the number of small radio remote units (pRRUs) deployed in the target cell corresponding to the base station, a time-division transmission rule for the pRRUs is generated.

[0031] When the user equipment completes network access, based on the preset period of the transmission channel measurement reference signal, aperiodic resource measurement is triggered, and the time-division transmission rule is sent to each pRRU;

[0032] The measurement results fed back by the user equipment are received through the uplink transmission channel. Based on the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules, the downlink signal strength measurement results corresponding to each pRRU are obtained.

[0033] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method as described in any one of the first aspects.

[0034] Fifthly, embodiments of this application provide a computer program product including computer instructions that, when executed by a processor, implement the steps of the method as described in any one of the first aspects.

[0035] Compared with existing technologies, the method, apparatus, and device for measuring downlink signal strength at the remote radio unit level provided in this application employ time-division serial polling, requiring sequential measurement of each pRRU. The time consumption increases with the number of pRRUs, resulting in poor real-time performance. In this application, the base station first configures channel measurement reference signals and aperiodic resources for the user equipment, and then generates time-division transmission rules based on the number of deployed pRRUs. These rules clearly define the signal transmission sequence of each pRRU, avoiding serial waiting. After the user equipment completes access, the base station triggers aperiodic resource measurement according to a preset period of the reference signal, and simultaneously distributes the time-division rules to all pRRUs. Each pRRU transmits signals according to the rules in a time-division manner, eliminating the need for sequential polling. Finally, the base station receives the measurement results from the user equipment and directly matches the downlink signal strength of each pRRU through the correspondence between aperiodic resources and the time-division rules, without waiting for individual pRRU measurement feedback, significantly reducing the total time consumption of one round of measurement and thus improving real-time performance. Attached Figure Description

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0037] Figure 1 A flowchart of a method for measuring downlink signal strength at the remote radio frequency unit level provided in this application embodiment;

[0038] Figure 2 This is a schematic diagram of the end-to-end interaction of pRRU-level downlink signal strength measurement provided in an embodiment of this application;

[0039] Figure 3 A structural diagram of the device for measuring downlink signal strength at the remote radio frequency unit level provided in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the structure of a network device according to an embodiment of this application. Detailed Implementation

[0041] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, without limiting the number of objects; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, "A or B" covers three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc.; an indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0043] To enable those skilled in the art to better understand the embodiments of this application, the following description is provided first:

[0044] Indoor digital base stations using 4G or 5G wireless communication technologies adopt a standard three-layer architecture: a Base Band Unit (BBU), a Hub Unit (HUB), and a Pico Remote Radio Unit (pRRU), with clearly defined functions for each unit. The BBU is responsible for core functions such as baseband signal processing, cell management, mobility management, and radio resource control. The HUB, as the signal aggregation and distribution unit in the base station scenario, is an intermediate aggregation node that combines the radio frequency signals from multiple pRRUs in the uplink direction and replicates and distributes the baseband signals sent by the BBU to each pRRU port in the downlink direction. The pRRUs are responsible for the transmission and reception of radio frequency signals and are discretely deployed in different areas of the indoor environment, with each pRRU covering a specific spatial range.

[0045] In the downlink direction, all pRRUs send identical data, and the terminal receives the superimposed signal of multiple pRRU signals over the air interface, making it impossible to directly distinguish the signal strength of a single pRRU. In the uplink direction, the HUB performs combining processing on the pRRU signals, and the BBU receives the combined signal, making it equally difficult to directly obtain the uplink measurement results of a single pRRU.

[0046] Discretely deployed pRRUs require accurate signal strength measurements to support functions such as location determination, neighbor cell optimization, and point-to-point energy saving. Traditional measurement methods cannot meet these requirements.

[0047] As described in the background section, in the prior art, the time required to complete one round of pRRU polling measurement using a time-division multiplexing method is related to the number of pRRU RF combiners. When the number of pRRU RF combiners is large, the time required for one polling can be several seconds, resulting in poor real-time performance. To solve at least one of the above problems, this application provides a method, apparatus, and device for measuring downlink signal strength at the remote radio unit level, which can reduce or avoid the occurrence of the above situations.

[0048] This application provides a method, apparatus, and device for measuring downlink signal strength at the remote radio frequency unit level. The method and apparatus are based on the same concept, and since they address similar problems in principle, their implementations can be mutually referenced; repeated details will not be repeated.

[0049] Please refer to Figure 1 This application provides a method for measuring downlink signal strength at the remote radio frequency unit level, applied to the base station side, including:

[0050] Step 11: When a user equipment accesses the network, the base station configures a channel measurement reference signal and aperiodic resources for the user equipment to perform channel state measurement.

[0051] After detecting that a user equipment has completed network access, the base station of this application configures a channel measurement reference signal and aperiodic measurement resources for channel state measurement. The channel measurement reference signal can be a Channel State Information Reference Signal (CSI-RS), and the aperiodic measurement resources refer to the aperiodic CSI-RS. Step 11, by clearly defining the signal carrier (reference signal) and resource carrier (aperiodic resources) for measurement, provides a standardized measurement basis for the user equipment and avoids resource waste caused by periodic measurements through the flexible configuration of aperiodic resources; at the same time, it accurately anchors the measurement object, laying a solid foundation for subsequent differentiation of each pRRU signal and acquisition of independent measurement results.

[0052] Step 12: Generate time-division transmission rules for pRRUs based on the number of small radio remote units (pRRUs) deployed in the target cell corresponding to the base station.

[0053] The base station generates a dedicated pRRU time-division transmission rule based on the actual number of pRRUs deployed in the target cell, specifying the signal transmission time slot, symbol position, and other timing information for each pRRU. Since the HUB in the indoor digital base station copies the baseband signal to each pRRU, resulting in identical downlink signals for all pRRUs, step 12 uses timing isolation to allocate a unique transmission window to each pRRU, giving the originally superimposed signals distinguishable timing characteristics. This fundamentally solves the problem of not being able to identify individual pRRU signals in traditional solutions.

[0054] Step 13: When the user equipment completes network access, based on the preset period of the transmission channel measurement reference signal, trigger aperiodic resource measurement and send the time-division transmission rule to each pRRU.

[0055] With the user equipment having completed network access, the base station triggers aperiodic resource measurements based on a preset period for transmitting the channel measurement reference signal. Simultaneously, it distributes the time-division transmission rules to all pRRUs via the downlink control channel. The preset period ensures the regularity and continuity of the measurements, meeting real-time monitoring requirements; aperiodic resource triggering enables on-demand measurement, avoiding resource waste; and the timely distribution of the time-division rules allows each pRRU to synchronously execute transmission operations according to the rules, replacing the traditional serial polling mode, significantly shortening the total measurement time and improving measurement real-time performance.

[0056] Step 14: Receive the measurement results fed back by the user equipment through the uplink transmission channel, and obtain the downlink signal strength measurement results corresponding to each pRRU based on the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules.

[0057] In this application, the base station receives the comprehensive measurement results fed back by the user equipment through the uplink transmission channel. Utilizing the correlation mapping relationship between the trigger timing of aperiodic resources and time-division multiplexing transmission rules—that is, the one-to-one correspondence between trigger time, resource identifier, and pRRU ID—the downlink signal strength data for each pRRU is extracted and matched from the comprehensive results. This transforms the superimposed signal received by the user equipment into independent pRRU-level measurement results, completely resolving the measurement confusion problem caused by downlink signal duplication in the HUB, and rapidly outputting accurate data. This provides a reliable basis for core functions such as user location determination and pRRU active set management.

[0058] Optionally, the aperiodic resource is an aperiodic channel state information-reference signal (CSI-RS) resource, and the aperiodic CSI-RS resource includes the configuration of non-zero power CSI-RS.

[0059] The aperiodic CSI-RS resource occupies a single symbol, which is the last symbol of slot zero in each preset duration radio frame, and adopts a single-port resource map with a preset resource density;

[0060] The measurement reporting configuration for the aperiodic CSI-RS resources is to associate the Channel Aware Reference Signal Resource Indicator (CRI) with the Reference Signal Received Power (RSRP).

[0061] In this embodiment of the application, when the user equipment (UE) accesses the network, in addition to allocating the channel measurement reference signal for channel state measurement, i.e. the basic CSI-RS resource, the base station will also allocate a new set of aperiodic CSI-RS resources. The CSI-RS resource includes a non-zero power CSI-RS (NZP-CSI-RS) configuration. The aperiodic CSI-RS resource occupies 1 symbol and uses the last symbol of slot 0 in each radio frame with a preset duration (such as 10ms). It adopts a single-port resource map with a preset resource density, which can be selected as a single-port map with a resource density of 3. The measurement reporting configuration of the aperiodic CSI-RS resource is to report CRI-RSRP.

[0062] Optionally, the time-division transmission rule is a polling transmission map, which is generated based on the number of pRRUs deployed in the target cell, and defines that only a single pRRU performs a transmission operation during each non-periodic resource transmission, while the remaining pRRUs perform a silent operation, with each pRRU corresponding to a transmission period of a radio frame.

[0063] In this application, the time-division transmission rule is a set of pRRU polling transmission patterns. These patterns are generated based on the actual number n of pRRUs deployed in the target cell. The core rule is: each time an aperiodic CSI-RS transmission is triggered, only a single pRRU is scheduled to perform an aperiodic resource transmission operation, while the remaining pRRUs enter a silent state to avoid signal interference. Simultaneously, each pRRU is allocated a dedicated radio frame transmission period to ensure complete isolation of the transmission behavior of each pRRU in the time dimension. Taking the deployment of eight pRRUs (denoted as pRRU1-pRRU8) in the target cell as an example, the specific definition of the polling transmission pattern is shown in Table 1 below. In the table, "1" represents that the corresponding pRRU performs a transmission operation within the radio frame period, and "0" represents that the corresponding pRRU performs a silent operation within the period.

[0064] Table 1: Example of pRRU polling transmission graph

[0065] Optionally, the operation that triggers aperiodic resource measurement includes:

[0066] At the time when the base station transmits aperiodic resources corresponding to each pRRU, it triggers aperiodic resource measurement through downlink control signaling; wherein, the user equipment reports the measurement results of the aperiodic resource measurement to the base station through the physical uplink shared channel.

[0067] In this embodiment of the application, the base station triggers aperiodic resource measurement to the user equipment through downlink control signaling (DCI) at the time of aperiodic resource transmission corresponding to each pRRU. After receiving the trigger signaling, the user equipment performs channel measurement on the aperiodic CSI-RS transmitted by the target pRRU in the current transmission period, and reports the results to the base station through the physical uplink shared channel (PUSCH) after the measurement is completed.

[0068] Specifically, after user access is completed, the base station triggers an aperiodic CSI-RS measurement via DCI at each time the pRRU transmits CSI-RS. The measurement result is reported to the base station via PUSCH. The BBU sends the aperiodic CSI-RS polling map to the pRRU, and the pRRU determines whether to transmit or not transmit the corresponding symbol signal according to the resource location of the aperiodic CSI-RS in the map.

[0069] The design of this application precisely synchronizes the triggering timing with the pRRU time-division transmission rules, ensuring that the user equipment only performs measurements during the period when the target pRRU transmits signals and the other pRRUs are silent. This avoids measurement interference caused by the superposition of multiple pRRU signals and ensures the relevance of the measurement results. PUSCH is used as the reporting channel, which takes into account both the reliability of data transmission and the resource utilization rate, ensuring that the measurement results are efficiently and accurately transmitted back to the base station, laying the foundation for subsequent pRRU-level data matching.

[0070] Optionally, the step of distributing the time-division sending rules to each pRRU includes:

[0071] The time-division transmission rules are distributed to each pRRU using a preset interface format. The preset interface format includes parameters such as: an interface message identifier that represents the unique identifier of the interface message, a pRRU identifier that represents the unique identifier of the remote radio unit, and a polling time configuration sequence. The polling time configuration sequence is a multi-dimensional integer array, with array elements taking values ​​of 0 or 1, used to represent the transmission timing of the pRRU in the radio frame dimension.

[0072] In this embodiment, the base station uses a preset standardized interface format to distribute the time-division multiplexing rules (polling transmission map) to each pRRU; the preset interface format includes three types of core parameters:

[0073] Interface message identifier: Used to uniquely identify the type and purpose of the interface message, avoid confusion with other control messages, and ensure that pRRU accurately identifies the rules for issuing instructions;

[0074] pRRU identifier: Used to uniquely identify each remote radio unit, ensuring that rules are received by the corresponding target pRRU and avoiding mis-parsing of rules across pRRUs;

[0075] Polling time configuration sequence: A multi-dimensional integer array is used, where each element takes only 0 or 1 values. 1 indicates that a transmission operation will be performed within the corresponding radio frame period, while 0 indicates silence. This intuitively and clearly defines the transmission timing of each pRRU within the radio frame dimension. Specifically, the preset interface format is shown in Table 2.

[0076] Table 2: Interface format for each pRRU

[0077] This application reduces the adaptation difficulty of pRRUs from different manufacturers by using a pre-defined interface format and a standardized interface, thereby improving the universality of the solution. The three types of parameters each perform their own functions and are progressively enhanced, which not only ensures the uniqueness and accuracy of message transmission, but also allows pRRUs to quickly parse the sending rules through array-based timing configuration, ensuring that all pRRUs strictly perform sending or silent operations according to a unified timing sequence, thus avoiding confusion in the time-sharing mechanism.

[0078] Optionally, the measurement results fed back by the user equipment are received through the uplink transmission channel, and the downlink signal strength measurement results corresponding to each pRRU are obtained by matching the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules, including:

[0079] The base station receives the measurement results of aperiodic resources fed back by the user equipment through the Physical Uplink Shared Channel (PUSCH) and records the aperiodic resource trigger time corresponding to the measurement results.

[0080] Based on the aperiodic resource trigger time, the time-division transmission rule is retrieved, and the sending end pRRU corresponding to the aperiodic resource trigger time is located.

[0081] The measurement results are correlated with the transmitting end pRRU to obtain the downlink signal strength measurement results corresponding to the transmitting end pRRU.

[0082] In this embodiment of the application, the base station receives aperiodic resource measurement results (such as channel quality indicator CQI, signal strength value, etc.) reported by user equipment through the physical uplink shared channel (PUSCH), and accurately records the aperiodic resource trigger time corresponding to the measurement result (i.e., the timestamp of the base station issuing the measurement trigger signaling).

[0083] pRRU location at the transmitting end: Based on the recorded trigger time, retrieve the issued time-division transmission rules (polling transmission map), and locate the unique transmitting end pRRU corresponding to the trigger time through the association mapping of trigger time - wireless frame period - pRRU transmission sequence, that is, the pRRU that performs signal transmission in the current period.

[0084] This application associates the received measurement results with the located transmitting pRRU one by one, and finally obtains the downlink signal strength measurement result corresponding to the pRRU. In this way, by using the mapping relationship between trigger time and time-division rules, the independent measurement data of a single pRRU can be accurately separated from the comprehensive measurement results reported by the user equipment, and the technical problem of multiple pRRU signals superimposed and indistinguishable due to HUB downlink signal duplication is completely solved.

[0085] In this application, after receiving the measurement results of the aperiodic CSI-RS from the terminal, the base station determines the pRRU that sent the current aperiodic CSI-RS according to the trigger time of the aperiodic CSI-RS corresponding to the received result, thereby obtaining the downlink RSRP results of the CSI-RS sent by each pRRU. The entire matching process is based on preset rules and timestamp association, without the need for complex algorithms, ensuring the efficiency of pRRU-level measurement result acquisition and providing real-time and accurate data support for scenarios such as user location determination and pRRU activation set management.

[0086] Reference Figure 2 The diagram illustrates the interactive process for downlink signal strength measurement at the pRRU level. The interactive devices include User Equipment (UE), Baseband Processing Unit (BBU), and Small Remote Radio Unit (pRRU). The specific process is as follows:

[0087] Resource configuration phase: The BBU issues a configuration instruction for "a set of aperiodic CSI-RS resources" to the UE. This corresponds to step 11 in the method, which is the operation of configuring channel measurement reference signals and aperiodic resources for the UE, providing standardized signal and resource carriers for subsequent measurements.

[0088] Polling graph distribution phase: The BBU locally stores the pre-generated polling graph (i.e., time-division sending rules), and distributes the polling graph to the pRRU after the function is enabled; this phase corresponds to the operations of "step 12 generating time-division sending rules and step 13 distributing rules" in the method, allowing the pRRU to know its own sending or silent timing.

[0089] Command transmission and timing confirmation stage: The BBU sends an "aperiodic CSI-RS signal transmission" command to the pRRU. After receiving the polling pattern, the pRRU determines its own corresponding polling transmission time. This stage realizes the pRRU's preparation for the execution of the time-division transmission rules, ensuring that each pRRU transmits signals in a time-isolated manner.

[0090] Signal transmission phase: During its corresponding polling period, the pRRU sends an aperiodic CSI-RS signal to the UE. This phase is the actual execution of the time-division transmission rule. By having a single pRRU send the signal while the other pRRUs remain silent, signal superposition and interference are avoided.

[0091] Measurement result reporting stage: After the UE completes the measurement of the aperiodic CSI-RS signal, it reports the "aperiodic CSI-RS measurement result" to the BBU, providing the original measurement basis for subsequent matching of pRRU level data.

[0092] Result matching step: The BBU associates and matches the received measurement results with the corresponding pRRU to finally determine the measurement data of a single pRRU; this step corresponds to the operation of "step 14 matching pRRU-level downlink signal strength results" in the method, and completes the accurate separation from the comprehensive measurement results to the pRRU-level data.

[0093] Figure 2 It fully presents the end-to-end interaction logic of pRRU-level downlink signal strength measurement, clarifies the roles and operation sequence of each network entity, and intuitively reflects the technical process of resource configuration, rule issuance, time-division transmission, result reporting, and data matching.

[0094] In summary, the solution proposed in this application, by adding a set of aperiodic CSI-RS resources to the user and combining it with the pRRU's time-polling transmission of aperiodic CSI-RS spectrum, enables each pRRU to independently transmit a downlink signal measurable by the UE, and obtains pRRU-level measurement data through the UE's feedback of CSI measurement results. This achieves the acquisition of pRRU-level measurement data by combining downlink polling CSI-RS signals with UE measurements. Through pRRU-level measurement data, refined management and operation can be achieved in fields such as positioning, energy saving, and maintenance.

[0095] The various methods of the embodiments of this application have been described above. Apparatus for implementing the above methods will now be provided.

[0096] Please refer to Figure 3 This application also provides an apparatus for measuring downlink signal strength at the remote radio frequency unit level, comprising:

[0097] The first processing module 31 is used to configure a channel measurement reference signal and aperiodic resources for channel state measurement for the user equipment when the user equipment accesses the network.

[0098] The second processing module 32 is used to generate time-division transmission rules for pRRUs based on the number of small radio remote units (pRRUs) deployed in the target cell corresponding to the base station.

[0099] The third processing module 33 is used to trigger aperiodic resource measurement based on a preset period of the transmission channel measurement reference signal when the user equipment completes network access, and to send the time-division transmission rule to each pRRU.

[0100] The fourth processing module 34 is used to receive the measurement results fed back by the user equipment through the uplink transmission channel, and to match and obtain the downlink signal strength measurement results corresponding to each pRRU based on the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules.

[0101] Optionally, the aperiodic resource is an aperiodic channel state information-reference signal (CSI-RS) resource, and the aperiodic CSI-RS resource includes the configuration of non-zero power CSI-RS.

[0102] The aperiodic CSI-RS resource occupies a single symbol, which is the last symbol of slot zero in each preset duration radio frame, and adopts a single-port resource map with a preset resource density;

[0103] The measurement reporting configuration for the aperiodic CSI-RS resources is to associate the Channel Aware Reference Signal Resource Indicator (CRI) with the Reference Signal Received Power (RSRP).

[0104] Optionally, the time-division transmission rule is a polling transmission map, which is generated based on the number of pRRUs deployed in the target cell, and defines that only a single pRRU performs a transmission operation during each non-periodic resource transmission, while the remaining pRRUs perform a silent operation, with each pRRU corresponding to a transmission period of a radio frame.

[0105] It should be noted that the operation of triggering aperiodic resource measurement includes:

[0106] At the time when the base station transmits aperiodic resources corresponding to each pRRU, it triggers aperiodic resource measurement through downlink control signaling; wherein, the user equipment reports the measurement results of the aperiodic resource measurement to the base station through the physical uplink shared channel.

[0107] Optionally, the step of distributing the time-division sending rules to each pRRU includes:

[0108] The time-division transmission rules are distributed to each pRRU using a preset interface format. The preset interface format includes parameters such as: an interface message identifier that represents the unique identifier of the interface message, a pRRU identifier that represents the unique identifier of the remote radio unit, and a polling time configuration sequence. The polling time configuration sequence is a multi-dimensional integer array, with array elements taking values ​​of 0 or 1, used to represent the transmission timing of the pRRU in the radio frame dimension.

[0109] Optionally, the fourth processing module 34 described above is specifically used for:

[0110] The base station receives the measurement results of aperiodic resources fed back by the user equipment through the Physical Uplink Shared Channel (PUSCH) and records the aperiodic resource trigger time corresponding to the measurement results.

[0111] Based on the aperiodic resource trigger time, the time-division transmission rule is retrieved, and the sending end pRRU corresponding to the aperiodic resource trigger time is located.

[0112] The measurement results are correlated with the transmitting end pRRU to obtain the downlink signal strength measurement results corresponding to the transmitting end pRRU.

[0113] It should be noted that the device in this embodiment corresponds to the method described above for measuring downlink signal strength at the remote radio frequency unit level on the base station side. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can achieve the same technical effect. The device provided in this application embodiment can implement all the method steps implemented in the above method embodiments and can achieve the same technical effect. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0114] Another embodiment of the network device of this application, referred to... Figure 4 As shown, it includes: memory 410, transceiver 420, and processor 430.

[0115] Memory 410 is used to store computer programs; transceiver 420 is used to receive and send data under the control of processor 430; processor 430 is used to read the computer programs in memory 410 and perform the following operations:

[0116] When a user equipment accesses the network, the base station configures a channel measurement reference signal and aperiodic resources for the user equipment to perform channel state measurement.

[0117] Based on the number of small radio remote units (pRRUs) deployed in the target cell corresponding to the base station, a time-division transmission rule for the pRRUs is generated.

[0118] When the user equipment completes network access, based on the preset period of the transmission channel measurement reference signal, aperiodic resource measurement is triggered, and the time-division transmission rule is sent to each pRRU;

[0119] The measurement results fed back by the user equipment are received through the uplink transmission channel. Based on the association mapping relationship between the triggering timing of aperiodic resources and the time-division transmission rules, the downlink signal strength measurement results corresponding to each pRRU are obtained.

[0120] Optionally, the aperiodic resource is an aperiodic channel state information-reference signal (CSI-RS) resource, and the aperiodic CSI-RS resource includes the configuration of non-zero power CSI-RS.

[0121] The aperiodic CSI-RS resource occupies a single symbol, which is the last symbol of slot zero in each preset duration radio frame, and adopts a single-port resource map with a preset resource density;

[0122] The measurement reporting configuration for the aperiodic CSI-RS resources is to associate the Channel Aware Reference Signal Resource Indicator (CRI) with the Reference Signal Received Power (RSRP).

[0123] Optionally, the time-division transmission rule is a polling transmission map, which is generated based on the number of pRRUs deployed in the target cell, and defines that only a single pRRU performs a transmission operation during each non-periodic resource transmission, while the remaining pRRUs perform a silent operation, with each pRRU corresponding to a transmission period of a radio frame.

[0124] It should be noted that the operation of triggering aperiodic resource measurement includes:

[0125] At the time when the base station transmits aperiodic resources corresponding to each pRRU, it triggers aperiodic resource measurement through downlink control signaling; wherein, the user equipment reports the measurement results of the aperiodic resource measurement to the base station through the physical uplink shared channel.

[0126] Optionally, the step of distributing the time-division sending rules to each pRRU includes:

[0127] The time-division transmission rules are distributed to each pRRU using a preset interface format. The preset interface format includes parameters such as: an interface message identifier that represents the unique identifier of the interface message, a pRRU identifier that represents the unique identifier of the remote radio unit, and a polling time configuration sequence. The polling time configuration sequence is a multi-dimensional integer array, with array elements taking values ​​of 0 or 1, used to represent the transmission timing of the pRRU in the radio frame dimension.

[0128] Optionally, the processor 430 is also specifically used for:

[0129] The base station receives the measurement results of aperiodic resources fed back by the user equipment through the Physical Uplink Shared Channel (PUSCH) and records the aperiodic resource trigger time corresponding to the measurement results.

[0130] Based on the aperiodic resource trigger time, the time-division transmission rule is retrieved, and the sending end pRRU corresponding to the aperiodic resource trigger time is located.

[0131] The measurement results are correlated with the transmitting end pRRU to obtain the downlink signal strength measurement results corresponding to the transmitting end pRRU.

[0132] This application provides a network device, such as Figure 4 As shown, it includes a transceiver 420, a processor 430, a memory 410, and a program or instructions stored in the memory 410 and executable on the processor 430; when the processor 430 executes the program or instructions, it implements the various processes of the above-described method embodiment on the base station side and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0133] The transceiver 420 is used to receive and send data under the control of the processor 430.

[0134] Among them, Figure 4 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 430 and memory represented by memory 410 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. Transceiver 420 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium.

[0135] The processor 430 is responsible for managing the bus architecture and general processing, and the memory 410 can store the data used by the processor 430 when performing operations.

[0136] This application also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the various processes of the above-described method embodiment for measuring downlink signal strength at the remote radio frequency unit level, and achieves the same technical effect. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0137] This application also provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, they implement the various processes of the above-described method embodiment for measuring downlink signal strength at the remote radio frequency unit level, and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0138] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0139] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0140] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for measuring downlink signal strength at a remote radio frequency unit level, characterized in that, The method comprises the following steps: In the case of user equipment accessing a network, a base station configures a channel measurement reference signal and an aperiodic resource for channel state measurement for the user equipment; According to the number of small remote radio units (pRRUs) deployed in a target cell corresponding to the base station, a time-sharing transmission rule of the pRRUs is generated; In the case that the user equipment completes network access, based on a preset period of transmitting a channel measurement reference signal, an aperiodic resource measurement is triggered, and the time-sharing transmission rule is sent to each pRRU; The measurement result fed back by the user equipment is received through an uplink transmission channel, and based on the association mapping relationship between the trigger timing of the aperiodic resource and the time-sharing transmission rule, the downlink signal strength measurement result corresponding to each pRRU is matched and obtained.

2. The method of claim 1, wherein, The aperiodic resource is an aperiodic channel state information-reference signal (CSI-RS) resource, and the aperiodic CSI-RS resource includes the configuration of a non-zero power CSI-RS; The aperiodic CSI-RS resource occupies a single symbol, and the symbol is the last symbol of a time slot zero in each preset time length radio frame, and a single-port resource pattern with a preset resource density is used; The measurement and reporting configuration of the aperiodic CSI-RS resource is the associated reporting of a channel sensing reference signal resource indication (CRI) and a reference signal received power (RSRP).

3. The method of claim 1, wherein, The time-sharing transmission rule is a polling transmission pattern, which is generated based on the number of pRRUs deployed in the target cell, and defines that only a single pRRU performs a transmission operation and the remaining pRRUs perform a silence operation at each aperiodic resource transmission time, and each pRRU corresponds to a transmission period of a radio frame.

4. The method of claim 1, wherein, The operation of triggering the aperiodic resource measurement comprises: The base station triggers the aperiodic resource measurement through downlink control signaling at the aperiodic resource transmission time corresponding to each pRRU; wherein the user equipment reports the measurement result of the aperiodic resource measurement to the base station through a physical uplink shared channel.

5. The method of claim 1, wherein, The time-sharing transmission rule is sent to each pRRU, which comprises: The time-sharing transmission rule is sent to each pRRU in a preset interface format, wherein the parameters contained in the preset interface format include an interface message identifier for representing the unique identifier of an interface message, a pRRU identifier for representing the unique identifier of a remote radio unit, and a polling time configuration sequence; the polling time configuration sequence is a multi-dimensional integer array, and the array element takes a value of 0 or 1, which is used to represent the transmission timing of the pRRU in the radio frame dimension.

6. The method of claim 1, wherein, The measurement result fed back by the user equipment is received through an uplink transmission channel, and based on the association mapping relationship between the trigger timing of the aperiodic resource and the time-sharing transmission rule, the downlink signal strength measurement result corresponding to each pRRU is matched and obtained, which comprises: The base station receives the measurement result of the aperiodic resource fed back by the user equipment through a physical uplink shared channel (PUSCH), and records the aperiodic resource trigger time corresponding to the measurement result; Based on the aperiodic resource trigger time, the time-sharing transmission rule is searched, and the transmission end pRRU corresponding to the aperiodic resource trigger time is located; Correlate the measurement result with the sending pRRU to obtain a downlink signal strength measurement result corresponding to the sending pRRU.

7. A device for measuring downlink signal strength at a remote radio unit level, characterized by The method comprises the steps of: The first processing module is configured to configure, in the case where the user equipment accesses the network, a channel measurement reference signal and an aperiodic resource for channel state measurement for the user equipment by the base station; The second processing module is configured to generate a time-sharing sending rule of a pRRU according to the number of pRRUs deployed in a target cell corresponding to the base station; The third processing module is configured to trigger the aperiodic resource measurement based on a preset period of sending the channel measurement reference signal in the case where the user equipment completes network access, and to send the time-sharing sending rule to each pRRU; The fourth processing module is configured to receive the measurement result fed back by the user equipment through an uplink transmission channel, and to obtain the downlink signal strength measurement result corresponding to each pRRU based on the association mapping relationship between the trigger timing sequence of the aperiodic resource and the time-sharing sending rule.

8. A network device, comprising: The method comprises the steps of: The memory, the transceiver, and the processor: The memory is configured to store a computer program; The transceiver is configured to receive and send data under the control of the processor; The processor is configured to read the computer program in the memory and perform the following operations: In the case where the user equipment accesses the network, a channel measurement reference signal and an aperiodic resource for channel state measurement are configured for the user equipment by the base station; A time-sharing sending rule of a pRRU is generated according to the number of pRRUs deployed in a target cell corresponding to the base station; In the case where the user equipment completes network access, the aperiodic resource measurement is triggered based on a preset period of sending the channel measurement reference signal, and the time-sharing sending rule is sent to each pRRU; The measurement result fed back by the user equipment is received through an uplink transmission channel, and the downlink signal strength measurement result corresponding to each pRRU is obtained based on the association mapping relationship between the trigger timing sequence of the aperiodic resource and the time-sharing sending rule.

9. A computer-readable storage medium, characterized in that, The computer program is stored on the computer readable storage medium, and the computer program is executed by the processor to implement the steps of the method according to any one of claims 1 to 6.

10. A computer program product, characterised in that, The computer program comprises computer instructions, and the computer instructions are executed by the processor to implement the steps of the method according to any one of claims 1 to 6.

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