Wireless signal enhancement method for enclosed spaces

Abstract

The application discloses a wireless signal enhancement method for a closed space, comprising the following steps: acquiring a space position and a target communication area, collecting a normal propagation response, and generating a normal propagation chain; collecting a current propagation response, generating a current propagation response sequence; determining a missing propagation response; determining the upstream nearest and downstream nearest current propagation responses, and determining a broken interval; determining a candidate propagation position, sequentially changing its wireless propagation state, and establishing a perturbation response relationship; determining a replacement propagation position based on the perturbation response relationship, and establishing a replacement propagation relationship; sequentially connecting to generate a replacement propagation chain, and determining a propagation adjustment parameter; changing the wireless propagation state, transmitting to the target communication area, and matching to generate a wireless signal enhancement result. The application realizes accurate signal enhancement in a closed space by using missing response positioning and perturbation chain repair, and has the advantages of accurate positioning and efficient adjustment.

Description

Technical Field

[0001] This invention relates to the field of wireless signal enhancement technology, and more particularly to a method for enhancing wireless signals in enclosed spaces. Background Technology

[0002] Existing wireless communication in confined spaces typically improves signal coverage by increasing transmission power, adjusting antenna direction, setting up relay equipment, or using adjustable reflective structures, and analyzes current communication quality by combining received signal strength, propagation delay, phase change, and path loss. In environments such as tunnels, cabins, underground spaces, and enclosed equipment rooms, wireless signals are easily affected by obstruction, reflection, and changes in spatial structure, leading to attenuation or interruption of the original propagation path.

[0003] Most existing technologies rely on the strength of the receiver signal or the overall channel state for enhancement and adjustment. This makes it difficult to pinpoint specific breaks in the propagation chain using propagation responses that should appear during normal propagation but are currently missing, and also makes it difficult to determine alternative propagation locations that can restore the downstream propagation response. Therefore, when the local propagation structure changes, existing methods tend to employ overall power enhancement or global path adjustment, resulting in insufficient enhancement targeting and low accuracy in propagation path repair.

[0004] Therefore, how to provide a method for enhancing wireless signals in enclosed spaces is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One objective of this invention is to propose a wireless signal enhancement method for enclosed spaces. This invention utilizes missing response localization and perturbation repair to achieve precise signal enhancement in enclosed spaces, and has the advantages of accurate positioning and efficient adjustment.

[0006] A wireless signal enhancement method for enclosed spaces according to an embodiment of the present invention includes the following steps:

[0007] The spatial location and target communication area of ​​each propagation position in a confined space are obtained, the normal propagation response of each propagation position under normal communication conditions is collected, and a normal propagation chain is generated based on the propagation response characteristics and spatial location.

[0008] Collect the current propagation response, match it with the normal propagation responses in the normal propagation chain, and arrange them in the order of propagation to generate the current propagation response sequence;

[0009] Match the normal propagation response with the current propagation response sequence along the normal propagation chain, and determine the normal propagation response that does not match the corresponding current propagation response as the missing propagation response;

[0010] Based on the missing propagation response, determine the most recent upstream and downstream current propagation responses, and determine the break interval accordingly;

[0011] Within the fracture interval, candidate propagation locations are determined, and their wireless propagation states are changed sequentially. A disturbance response relationship is established based on the changes in the propagation response characteristics of the current downstream propagation response.

[0012] Based on the disturbance response relationship, identify the alternative propagation location that can match the current downstream propagation response with the corresponding normal propagation response, and establish the alternative propagation relationship;

[0013] The upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment are sequentially connected to generate the alternative propagation chain, and the propagation adjustment parameters corresponding to the alternative propagation position are determined.

[0014] By changing the wireless propagation state of the alternative propagation location according to the propagation adjustment parameters, the wireless signal is transmitted to the target communication area along the alternative propagation chain. The current propagation response of the target communication area is matched with the corresponding normal propagation response to generate a wireless signal enhancement result.

[0015] Optionally, the generation of the normal propagation chain includes:

[0016] Acquire the spatial location and target communication area of ​​each propagation position within a confined space, and collect the normal propagation response of each propagation position under normal communication conditions;

[0017] Determine the propagation response characteristics of each normal propagation response, including propagation delay, response amplitude, and response phase;

[0018] According to the spatial location of each propagation location, the normal propagation response is associated with the corresponding propagation location, and the propagation order of each normal propagation response is determined based on the propagation delay.

[0019] Connect each normal propagation response sequentially according to the propagation order, and determine the propagation association between adjacent normal propagation responses by combining the response amplitude and response phase, and generate a normal propagation chain based on the propagation association.

[0020] Optionally, the generation of the current propagation response sequence includes:

[0021] In the current communication state, collect the current propagation response at each propagation location and determine the propagation response characteristics of each current propagation response;

[0022] Based on the propagation location and propagation response characteristics, each current propagation response is mapped to a normal propagation response in the normal propagation chain to determine the corresponding position of each current propagation response in the normal propagation chain.

[0023] The current propagation responses are arranged according to their corresponding positions and propagation order in the normal propagation chain to generate a current propagation response sequence.

[0024] Optionally, determining the missing propagation response includes:

[0025] Read the normal propagation responses one by one in the order of propagation along the normal propagation chain. Use the propagation position corresponding to the normal propagation response as the matching index to filter the current propagation response at the corresponding propagation position from the current propagation response sequence and generate candidate current propagation responses.

[0026] The characteristic differences between the candidate current propagation response and the corresponding normal propagation response in terms of propagation delay, response amplitude, and response phase are calculated respectively. The response matching result is generated by combining the position of the candidate current propagation response in the current propagation response sequence.

[0027] Based on the response matching results, candidate current propagation responses whose propagation response characteristics and arrangement positions correspond to normal propagation responses are identified as matched current propagation responses, and normal propagation responses that do not obtain matched current propagation responses are identified as propagation responses to be verified.

[0028] For the propagation response to be verified, the current propagation response corresponding to its propagation position is retrieved again in the current propagation response sequence, and the propagation delay, response amplitude and response phase are used for secondary matching in turn to generate secondary matching results;

[0029] Based on the results of the second-order matching, the propagation responses that still do not match the current propagation response are identified as missing propagation responses.

[0030] Optionally, determining the fracture interval includes:

[0031] Determine the position of the missing propagation response in the normal propagation chain, and starting from that position, search for the propagation response upstream and downstream according to the propagation sequence of the normal propagation chain.

[0032] Read the propagation positions in the normal propagation chain sequentially along the upstream direction, and find the current propagation response corresponding to the propagation position from the current propagation response sequence. The first current propagation response found is determined as the nearest current propagation response upstream.

[0033] Read the propagation positions in the normal propagation chain sequentially along the downstream direction, and find the current propagation response corresponding to the propagation position from the current propagation response sequence. The first current propagation response found is determined as the nearest current propagation response downstream.

[0034] The propagation position corresponding to the most recent current propagation response upstream is determined as the upstream propagation position of the fracture interval, and the propagation position corresponding to the most recent current propagation response downstream is determined as the downstream propagation position of the fracture interval. The propagation segment between the two propagation positions along the normal propagation chain is determined as the fracture interval.

[0035] Optionally, the establishment of the disturbance response relationship includes:

[0036] Within the spatial range corresponding to the fracture interval, determine the propagation location that can change the wireless propagation state, and use the determined propagation location as a candidate propagation location.

[0037] Candidate propagation locations are selected sequentially, while keeping the wireless propagation status of the remaining candidate propagation locations unchanged. The current propagation response of the downstream propagation location of the fracture section before and after the change of the wireless propagation status of the current candidate propagation location is collected. After the collection is completed, the wireless propagation status of the current candidate propagation location is restored, and then the next candidate propagation location is selected.

[0038] By correlating the current propagation responses before and after the change in wireless propagation state, the direction and amount of change in propagation delay, response amplitude, and response phase are determined respectively, thus obtaining the changes in propagation response characteristics caused by the change in wireless propagation state at the current candidate propagation location.

[0039] By determining the changes in wireless propagation state and propagation response characteristics for each candidate propagation location, the candidate propagation locations, the corresponding changes in wireless propagation state, and the changes in propagation response characteristics of the downstream propagation locations in the fracture section are correlated to establish the disturbance response relationship between the candidate propagation locations and the downstream propagation locations in the fracture section.

[0040] Optionally, the establishment of the disturbance response relationship includes:

[0041] According to the order of the wireless propagation state changes at the candidate propagation locations, each wireless propagation state change is paired with the propagation response characteristic changes at the corresponding downstream propagation locations of the fracture interval to generate a disturbance response record.

[0042] The disturbance response records are associated with the corresponding candidate propagation locations, so that each candidate propagation location corresponds to the changes in the wireless propagation state and the changes in propagation response characteristics.

[0043] The disturbance response records corresponding to the candidate propagation locations are collected, and each disturbance response record is associated with the downstream propagation location of the fracture interval to generate the disturbance association relationship corresponding to the candidate propagation location.

[0044] The perturbation correlations corresponding to each candidate propagation location are collected, and the perturbation response relationship between the candidate propagation location and the downstream propagation location of the fracture interval is established.

[0045] Optionally, the establishment of the alternative propagation relationship includes:

[0046] Read the changes in wireless propagation state corresponding to each candidate propagation position in the disturbance response relationship in sequence, and read the current propagation response of the downstream propagation position of the fracture interval after the corresponding wireless propagation state change.

[0047] The current propagation response corresponding to each candidate propagation position is matched with the normal propagation response corresponding to the downstream propagation position of the fracture interval. The propagation delay, response amplitude and response phase are compared to generate the recovery matching result.

[0048] Based on the recovery matching results, candidate propagation locations whose propagation delay, response amplitude, and response phase all match the corresponding normal propagation response are determined as alternative propagation locations;

[0049] Following the propagation sequence of the normal propagation chain, a propagation connection is established between the upstream propagation location of the fracture section and the alternative propagation location, and a propagation connection is established between the alternative propagation location and the downstream propagation location of the fracture section. The two propagation connections generate an alternative propagation relationship.

[0050] Optionally, determining the propagation adjustment parameters includes:

[0051] Determine the upstream propagation chain segment extending from the normal propagation chain to the upstream propagation position of the fracture interval, and determine the downstream propagation chain segment extending from the downstream propagation position of the fracture interval to the target communication area;

[0052] Following the propagation sequence of the normal propagation chain, the upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment are connected sequentially, so that the alternative propagation relationship connects the upstream propagation position of the fracture interval and the downstream propagation position of the fracture interval, thereby generating the alternative propagation chain;

[0053] Read the change in wireless propagation state corresponding to the alternative propagation location from the disturbance response relationship;

[0054] The propagation adjustment parameters corresponding to the alternative propagation location are determined based on the change in wireless propagation status.

[0055] Optionally, the generation of the wireless signal enhancement result includes:

[0056] The wireless propagation state of the alternative propagation location is changed according to the propagation adjustment parameters, so that the wireless signal is transmitted to the target communication area through the alternative propagation location along the alternative propagation chain;

[0057] After the wireless propagation state change at the alternative propagation location is completed, the current propagation response of the target communication area is collected, and the propagation delay, response amplitude, and response phase of the current propagation response are determined.

[0058] Read the normal propagation response corresponding to the target communication area from the normal propagation chain, and compare the current propagation response with the normal propagation response according to the propagation delay, response amplitude and response phase;

[0059] When the propagation delay, response amplitude, and response phase of the current propagation response all match those of the normal propagation response, a wireless signal enhancement result is generated.

[0060] The beneficial effects of this invention are:

[0061] This invention collects normal propagation responses at various propagation locations within a confined space under normal communication conditions. It then establishes a normal propagation chain by combining propagation location, propagation delay, response amplitude, and response phase. This allows the propagation sequence and characteristics of wireless signals under normal conditions to be characterized in a chain-like structure. In the current communication state, the current propagation response is mapped one-to-one with the normal propagation chain. Missing propagation responses are identified by utilizing responses present in the normal propagation chain but not corresponding to those in the current propagation response sequence. This transforms the traditional method of judging communication anomalies solely based on received signal strength into a method of locating and analyzing the propagation process based on missing propagation responses. This facilitates the identification of local anomalies in the wireless propagation process and improves the targeting of anomaly identification in confined spaces.

[0062] Furthermore, this invention utilizes the position of the missing propagation response within the normal propagation chain to determine the most recently existing propagation responses upstream and downstream, thereby forming a break interval. This allows propagation anomalies to be further located to specific propagation segments from a single missing response. Within the break interval, the wireless propagation state of candidate propagation positions is sequentially changed, while simultaneously collecting the current propagation response of the downstream propagation position before and after the state change. By establishing a disturbance response relationship through changes in propagation delay, response amplitude, and response phase, it is possible to analyze the actual impact of different candidate propagation positions on the downstream wireless propagation state, reducing the bias caused by relying solely on spatial location or signal strength to select enhancement positions.

[0063] Based on this, the present invention uses perturbation response relationships to screen candidate propagation locations downstream of the fractured section that can re-form a propagation response matching the normal propagation response. These candidate propagation locations are then identified as alternative propagation locations, and alternative propagation relationships are established. These alternative propagation locations are then connected to the upstream and downstream segments of the normal propagation chain to form an alternative propagation chain. Therefore, it is not necessary to reconstruct the entire wireless propagation path in a confined space. Instead, it can replace and repair local fractures in the propagation chain and further utilize corresponding propagation adjustment parameters to change the wireless propagation state of the alternative propagation locations, enabling the wireless signal to be transmitted along the alternative propagation chain to the target communication area. Finally, the enhancement result is verified by re-matching the current propagation response of the target communication area with the normal propagation response. This improves the positioning accuracy, propagation adjustment targeting, and reliability of the enhancement results. Attached Figure Description

[0064] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0065] Figure 1This is an overall flowchart of the wireless signal enhancement method for enclosed spaces proposed in this invention;

[0066] Figure 2 This is a comparison diagram of the normal propagation response and the current propagation response in the wireless signal enhancement method for enclosed spaces proposed in this invention. Detailed Implementation

[0067] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0068] refer to Figures 1-2 A method for enhancing wireless signals in enclosed spaces includes the following steps:

[0069] The spatial location and target communication area of ​​each propagation position in a confined space are obtained. Under normal communication conditions, the normal propagation response of each propagation position is collected, and the propagation response characteristics of the normal propagation response are determined. The propagation response characteristics include propagation delay, response amplitude and response phase. The normal propagation responses are sequentially associated according to the spatial location and propagation response characteristics to generate a normal propagation chain.

[0070] In the current communication state, the current propagation response at each propagation position is collected, the propagation response characteristics of the current propagation response are determined, the current propagation response is matched with the normal propagation response in the normal propagation chain based on the propagation response characteristics, and the current propagation response is arranged according to the propagation sequence of the normal propagation chain to generate the current propagation response sequence.

[0071] Each normal propagation response is matched one by one with the current propagation response sequence along the normal propagation chain. Normal propagation responses that exist in the normal propagation chain but do not match the current propagation response sequence are identified as missing propagation responses.

[0072] Based on the position of the missing propagation response in the normal propagation chain, the nearest current propagation response upstream and downstream of the missing propagation response are determined respectively. The propagation position corresponding to the nearest current propagation response upstream is determined as the upstream propagation position of the fracture interval, and the propagation position corresponding to the nearest current response downstream is determined as the downstream propagation position of the fracture interval. The propagation segment between the upstream propagation position and the downstream propagation position of the fracture interval is determined as the fracture interval.

[0073] Candidate propagation positions are determined within the spatial range corresponding to the fracture interval. The wireless propagation state of the candidate propagation positions is changed sequentially, and the current propagation response of the downstream propagation position of the fracture interval before and after the change of the wireless propagation state is collected. Based on the change of the propagation response characteristics of the current propagation response, the disturbance response relationship between the candidate propagation positions and the downstream propagation position of the fracture interval is established.

[0074] Based on the disturbance response relationship, candidate propagation locations that can re-form a current propagation response that matches the corresponding normal propagation response at the downstream propagation location of the fracture section are selected. The selected candidate propagation locations are determined as alternative propagation locations, and alternative propagation relationships are established between the upstream propagation location of the fracture section, the alternative propagation location, and the downstream propagation location of the fracture section.

[0075] From the normal propagation chain, determine the upstream propagation chain segment before the upstream propagation position of the fracture interval and the downstream propagation chain segment after the downstream propagation position of the fracture interval. According to the propagation sequence of the normal propagation chain, connect the upstream propagation chain segment, the alternative propagation relationship and the downstream propagation chain segment in sequence to generate an alternative propagation chain that reaches the target communication area. Determine the propagation adjustment parameters corresponding to the alternative propagation position. The propagation adjustment parameters include at least one of the following: transmission direction, transmission phase, carrier frequency and reflection state.

[0076] The wireless propagation state of the alternative propagation location is changed according to the propagation adjustment parameters, so that the wireless signal is transmitted to the target communication area along the alternative propagation chain. The current propagation response of the target communication area is collected and matched with the corresponding normal propagation response in the normal propagation chain. When a match is formed, a wireless signal enhancement result is generated.

[0077] In this embodiment, the generation of the normal propagation chain includes:

[0078] Acquire the spatial location and target communication area of ​​each propagation position within a confined space, and collect the normal propagation response of each propagation position under normal communication conditions;

[0079] Determine the propagation response characteristics of each normal propagation response, including propagation delay, response amplitude, and response phase;

[0080] According to the spatial location of each propagation location, the normal propagation response is associated with the corresponding propagation location, and the propagation order of each normal propagation response is determined based on the propagation delay.

[0081] Connect each normal propagation response sequentially according to the propagation order, and determine the propagation association between adjacent normal propagation responses by combining the response amplitude and response phase, and generate a normal propagation chain based on the propagation association;

[0082] Specifically, under normal communication conditions, multiple sets of normal propagation responses are continuously collected at each propagation location. Representative values ​​of propagation delay, response amplitude, and response phase are determined respectively. The normal propagation responses are arranged in ascending order of propagation delay. The spatial position difference between the propagation locations corresponding to adjacent normal propagation responses is read, and the propagation delay difference, response amplitude difference, and response phase difference are calculated. The spatial position difference and the three propagation response characteristic differences are jointly associated with the corresponding adjacent normal propagation responses. Then, the propagation associations are connected according to the propagation sequence to generate a normal propagation chain.

[0083] In this embodiment, the generation of the current propagation response sequence includes:

[0084] In the current communication state, collect the current propagation response at each propagation location and determine the propagation response characteristics of each current propagation response;

[0085] Based on the propagation location and propagation response characteristics, each current propagation response is mapped to a normal propagation response in the normal propagation chain to determine the corresponding position of each current propagation response in the normal propagation chain.

[0086] The current propagation responses are arranged according to their corresponding positions and propagation order in the normal propagation chain to generate a current propagation response sequence.

[0087] In this embodiment, determining the missing propagation response includes:

[0088] Read the normal propagation responses one by one in the order of propagation along the normal propagation chain. Use the propagation position corresponding to the normal propagation response as the matching index to filter the current propagation response at the corresponding propagation position from the current propagation response sequence and generate candidate current propagation responses.

[0089] The characteristic differences between the candidate current propagation response and the corresponding normal propagation response in terms of propagation delay, response amplitude, and response phase are calculated respectively. The response matching result is generated by combining the position of the candidate current propagation response in the current propagation response sequence.

[0090] Specifically, the propagation delay difference, response amplitude difference, and response phase difference are calculated for the candidate current propagation response and the corresponding normal propagation response, respectively. The position of the candidate current propagation response in the current propagation response sequence is read, and the three feature differences and the position are mapped to the normal propagation response. The corresponding results are recorded item by item according to each normal propagation response to generate the response matching result.

[0091] Based on the response matching results, candidate current propagation responses whose propagation response characteristics and arrangement positions correspond to normal propagation responses are identified as matched current propagation responses, and normal propagation responses that do not obtain matched current propagation responses are identified as propagation responses to be verified.

[0092] Specifically, based on multiple sets of normal propagation responses at the same propagation location under normal communication conditions, normal variation ranges of propagation delay, response amplitude, and response phase are formed respectively. The response matching results are read, and the three propagation response features and their arrangement positions of the candidate current propagation response are matched with the corresponding normal propagation responses one by one. The candidate current propagation response that forms the corresponding three propagation response features and their arrangement positions is determined as the matched current propagation response, and the remaining normal propagation responses are determined as propagation responses to be verified.

[0093] For the propagation response to be verified, the current propagation response corresponding to its propagation position is retrieved again in the current propagation response sequence, and the propagation delay, response amplitude and response phase are used for secondary matching in turn to generate secondary matching results;

[0094] Specifically, using the propagation position corresponding to the propagation response to be verified as the index, all current propagation responses corresponding to that propagation position are reread from the current propagation response sequence. During the secondary matching process, the arrangement position of the current propagation response in the current propagation response sequence is no longer referenced. The propagation delay difference, response amplitude difference, and response phase difference between the reread current propagation response and the propagation response to be verified are calculated in sequence. The three propagation response feature correspondence results are formed in the order of propagation delay, response amplitude, and response phase. The three correspondence results are written into the secondary matching result.

[0095] Based on the results of the second-order matching, the propagation responses that still do not match the current propagation response are identified as missing propagation responses;

[0096] Specifically, the secondary matching results corresponding to the propagation response to be verified are read item by item, and the propagation delay, response amplitude and response phase of the current propagation response obtained by re-retrieval are checked. The propagation response to be verified that still does not form a complete correspondence of the three propagation response features in the secondary matching results is determined as a missing propagation response, and the position of the missing propagation response in the normal propagation chain is retained.

[0097] In this embodiment, the determination of the fracture interval includes:

[0098] Determine the position of the missing propagation response in the normal propagation chain, and starting from that position, search for the propagation response upstream and downstream according to the propagation sequence of the normal propagation chain.

[0099] Specifically, the sequence number of each normal propagation response record chain is determined according to the propagation order of the normal propagation chain, and the sequence number of the chain corresponding to the missing propagation response is read. The sequence number of the chain is used as the starting point for the search, and the upstream search direction is formed in reverse along the propagation order, and the downstream search direction is formed in forward along the propagation order.

[0100] Read the propagation positions in the normal propagation chain sequentially along the upstream direction, and find the current propagation response corresponding to the propagation position from the current propagation response sequence. The first current propagation response found is determined as the nearest current propagation response upstream.

[0101] Specifically, starting from the position corresponding to the missing propagation response, the propagation positions in the normal propagation chain are read one by one according to the upstream search direction. The current propagation response is retrieved from the current propagation response sequence using the read propagation position as an index. The current propagation response retrieved for the first time in the upstream direction is determined as the most recent current propagation response upstream.

[0102] Read the propagation positions in the normal propagation chain sequentially along the downstream direction, and find the current propagation response corresponding to the propagation position from the current propagation response sequence. The first current propagation response found is determined as the nearest current propagation response downstream.

[0103] Specifically, starting from the position corresponding to the missing propagation response, the propagation positions in the normal propagation chain are read one by one according to the downstream search direction. The current propagation response is retrieved from the current propagation response sequence using the read propagation position as an index. The current propagation response retrieved for the first time in the downstream direction is determined as the most recent current propagation response downstream.

[0104] The propagation position corresponding to the most recent current propagation response upstream is determined as the upstream propagation position of the fracture interval, the propagation position corresponding to the most recent current propagation response downstream is determined as the downstream propagation position of the fracture interval, and the propagation segment between the two propagation positions along the normal propagation chain is determined as the fracture interval.

[0105] Specifically, the propagation positions corresponding to the most recent current propagation response upstream and downstream are read respectively, and located to the normal propagation chain. The continuous propagation positions and propagation associations between the two propagation positions are extracted along the normal propagation chain, and the extracted continuous propagation segments are determined as the break intervals.

[0106] In this embodiment, the establishment of the disturbance response relationship includes:

[0107] Within the spatial range corresponding to the fracture interval, determine the propagation location that can change the wireless propagation state, and use the determined propagation location as a candidate propagation location.

[0108] Specifically, the wireless propagation state corresponding to each propagation position within the fracture interval is read, and the parameter type that can be independently adjusted for each propagation position is obtained. The parameter type includes at least one of transmission direction, transmission phase, carrier frequency and reflection state. The propagation position with independently adjustable parameters is determined as a candidate propagation position, and each candidate propagation position is recorded according to its spatial location.

[0109] Candidate propagation locations are selected sequentially, while keeping the wireless propagation status of the remaining candidate propagation locations unchanged. The current propagation response of the downstream propagation location of the fracture section before and after the change of the wireless propagation status of the current candidate propagation location is collected. After the collection is completed, the wireless propagation status of the current candidate propagation location is restored, and then the next candidate propagation location is selected.

[0110] Specifically, candidate propagation locations are selected sequentially, while keeping the wireless propagation state of the other candidate propagation locations unchanged each time. The current propagation response of the downstream propagation location of the fracture interval before and after the change of the wireless propagation state of the current candidate propagation location is collected. When the wireless propagation state of the current candidate propagation location is changed, the parameter type, parameter value before the change, and parameter value after the change are recorded and used as the record content of the corresponding wireless propagation state change. The two collection results are associated with the current candidate propagation location and the corresponding wireless propagation state change and saved. After the collection is completed, the original wireless propagation state of the current candidate propagation location is restored, and then the next candidate propagation location is processed.

[0111] By correlating the current propagation responses before and after the change in wireless propagation state, the direction and amount of change in propagation delay, response amplitude, and response phase are determined respectively, thus obtaining the changes in propagation response characteristics caused by the change in wireless propagation state at the current candidate propagation location.

[0112] Specifically, the current propagation response before and after the change of the wireless propagation state at the same candidate propagation location is correlated. The corresponding values ​​before the change are subtracted from the changed propagation delay, response amplitude, and response phase respectively to obtain the change in the three propagation response characteristics. The direction of change is recorded according to the sign of the change. The change in propagation response characteristics is formed by the change direction and the change amount.

[0113] The changes in wireless propagation state and propagation response characteristics of each candidate propagation location are determined one by one. The candidate propagation locations, the corresponding changes in wireless propagation state, and the changes in propagation response characteristics of the downstream propagation locations of the fracture section are correlated to establish the disturbance response relationship between the candidate propagation locations and the downstream propagation locations of the fracture section.

[0114] Specifically, using the candidate propagation location as an index, the corresponding change in wireless propagation state is bound to the change in propagation response characteristics obtained in S53, and the downstream propagation location of the break interval that generates the change in propagation response characteristics is further associated, so that the candidate propagation location, the change in wireless propagation state, the change in propagation response characteristics and the downstream propagation location of the break interval remain corresponding. The above correspondence is aggregated according to each candidate propagation location to establish a disturbance response relationship.

[0115] In this embodiment, the establishment of the disturbance response relationship includes:

[0116] According to the order of the wireless propagation state changes at the candidate propagation locations, each wireless propagation state change is paired with the propagation response characteristic changes at the corresponding downstream propagation locations of the fracture interval to generate a disturbance response record.

[0117] The disturbance response records are associated with the corresponding candidate propagation locations, so that each candidate propagation location corresponds to the changes in the wireless propagation state and the changes in propagation response characteristics.

[0118] The disturbance response records corresponding to the candidate propagation locations are collected, and each disturbance response record is associated with the downstream propagation location of the fracture interval to generate the disturbance association relationship corresponding to the candidate propagation location.

[0119] The perturbation correlations corresponding to each candidate propagation location are collected, and the perturbation response relationship between the candidate propagation location and the downstream propagation location of the fracture interval is established.

[0120] In this embodiment, the establishment of the substitution propagation relationship includes:

[0121] Read the changes in wireless propagation state corresponding to each candidate propagation position in the disturbance response relationship in sequence, and read the current propagation response of the downstream propagation position of the fracture interval after the corresponding wireless propagation state change.

[0122] Specifically, the corresponding wireless propagation state change is read from the disturbance response relationship according to the candidate propagation position. The acquisition results are jointly located and associated with the candidate propagation position and the wireless propagation state change. The current propagation response of the downstream propagation position of the fracture section after the wireless propagation state change is read from the acquisition results, and the current propagation response is used to restore the matching.

[0123] The current propagation response corresponding to each candidate propagation position is matched with the normal propagation response corresponding to the downstream propagation position of the fracture interval. The propagation delay, response amplitude and response phase are compared to generate the recovery matching result.

[0124] Specifically, based on multiple sets of normal propagation responses collected at the downstream propagation location of the fracture section under normal communication conditions, the normal variation ranges of propagation delay, response amplitude, and response phase are determined respectively. Using the three propagation response characteristics corresponding to the normal propagation response as a benchmark, the normal variation ranges are converted into propagation delay difference ranges, response amplitude difference ranges, and response phase difference ranges. Then, the propagation delay difference, response amplitude difference, and response phase difference between the current propagation response after the change in wireless propagation state and the corresponding normal propagation response are calculated. The three differences are mapped to the corresponding difference ranges respectively, and the three corresponding states are summarized to generate the recovery matching result.

[0125] Based on the recovery matching results, candidate propagation locations whose propagation delay, response amplitude, and response phase all match the corresponding normal propagation response are determined as alternative propagation locations;

[0126] Specifically, the recovery matching results are read one by one according to the recording order of the candidate propagation positions in the disturbance response relationship, and the corresponding states of propagation delay, response amplitude and response phase are read respectively. Candidate propagation positions that match the normal propagation response corresponding to the propagation position downstream of the fracture interval are recorded in sequence, and the first candidate propagation position in the recording order is determined as the alternative propagation position.

[0127] Following the propagation sequence of the normal propagation chain, a propagation connection is established between the upstream propagation location of the fracture section and the alternative propagation location, and a propagation connection is established between the alternative propagation location and the downstream propagation location of the fracture section. The two propagation connections generate an alternative propagation relationship.

[0128] Specifically, for alternative propagation locations, the upstream propagation location, alternative propagation location, and downstream propagation location of the fracture interval are arranged according to the propagation direction of the normal propagation chain. Propagation connections are established from the upstream propagation location to the alternative propagation location and from the alternative propagation location to the downstream propagation location of the fracture interval. The two propagation connections are connected in the order of propagation to generate alternative propagation relationships.

[0129] In this embodiment, the determination of the propagation adjustment parameters includes:

[0130] Determine the upstream propagation chain segment extending from the normal propagation chain to the upstream propagation position of the fracture interval, and determine the downstream propagation chain segment extending from the downstream propagation position of the fracture interval to the target communication area;

[0131] Following the propagation sequence of the normal propagation chain, the upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment are connected sequentially, so that the alternative propagation relationship connects the upstream propagation position of the fracture interval and the downstream propagation position of the fracture interval, thereby generating the alternative propagation chain;

[0132] Specifically, the propagation positions and propagation order in the upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment are read respectively. The end of the upstream propagation chain segment closest to the upstream propagation position of the fracture interval and the end of the downstream propagation chain segment closest to the downstream propagation position of the fracture interval are determined. According to the original propagation order of the normal propagation chain, the upstream propagation chain segment is connected with the upstream propagation position of the fracture interval in the alternative propagation relationship, and the downstream propagation position of the fracture interval in the alternative propagation relationship is connected with the downstream propagation chain segment. Then, an alternative propagation chain reaching the target communication area is formed according to the order of the upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment.

[0133] Read the change in wireless propagation state corresponding to the alternative propagation location from the disturbance response relationship;

[0134] Specifically, the disturbance response relationship is retrieved using the alternative propagation location as an index, the change in wireless propagation state corresponding to the alternative propagation location is located, the change in wireless propagation state is read out, and it is provided to the propagation adjustment parameter determination process.

[0135] The propagation adjustment parameters corresponding to the alternative propagation location are determined according to the change in wireless propagation state. The propagation adjustment parameters include at least one of the following: transmission direction, transmission phase, carrier frequency, and reflection state.

[0136] Specifically, the changes in wireless propagation status corresponding to the alternative propagation location are read, and the transmission direction, transmission phase, carrier frequency or reflection status involved in the changes in wireless propagation status are identified. The target parameter values ​​adopted by the corresponding parameters during the changes in wireless propagation status are read, and the parameter type and target parameter values ​​are determined as the propagation adjustment parameters corresponding to the alternative propagation location.

[0137] In this embodiment, the generation of the wireless signal enhancement result includes:

[0138] The wireless propagation state of the alternative propagation location is changed according to the propagation adjustment parameters, so that the wireless signal is transmitted to the target communication area through the alternative propagation location along the alternative propagation chain;

[0139] After the wireless propagation state change at the alternative propagation location is completed, the current propagation response of the target communication area is collected, and the propagation delay, response amplitude, and response phase of the current propagation response are determined.

[0140] Read the normal propagation response corresponding to the target communication area from the normal propagation chain, and compare the current propagation response with the normal propagation response according to the propagation delay, response amplitude and response phase;

[0141] Specifically, the normal propagation response corresponding to the target communication area is read from the normal propagation chain, and combined with multiple sets of normal propagation responses collected in the target communication area under normal communication conditions, the normal variation ranges of propagation delay, response amplitude, and response phase are formed respectively. The current propagation response of the target communication area after the change of wireless propagation state is read, and three propagation response features are obtained respectively. The propagation delay, response amplitude, and response phase of the current propagation response are compared with the corresponding normal variation ranges respectively to obtain the comparison results of the three propagation response features.

[0142] When the propagation delay, response amplitude, and response phase of the current propagation response all match those of the normal propagation response, a wireless signal enhancement result is generated.

[0143] Specifically, the comparison results of the three propagation response features are read, and the matching status of propagation delay, response amplitude and response phase are determined respectively. The state in which all three propagation response features are matched is taken as the matching result between the current propagation response and the normal propagation response, and the wireless signal enhancement result is generated based on the matching result.

[0144] Example 1: To verify the feasibility of this invention in practice, it was applied to a wireless communication enhancement scenario in a closed equipment compartment. The equipment compartment contains metal cabinets, pipeline supports, partitions, wireless communication equipment, and adjustable reflectors. Wireless signals are transmitted from one side of the equipment compartment to the target communication area on the other side. Fixed measurement points capable of acquiring wireless propagation responses and adjustable positions capable of changing the wireless propagation state are selected along the main propagation direction as propagation positions. The spatial positions of each propagation position are recorded after the equipment is deployed. Under normal communication conditions, the wireless signal propagates continuously through the internal structure of the equipment compartment. When the positions of some metal cabinets change and new obstructions are formed, the received response in the target communication area decreases significantly. While increasing the transmission power alone can improve the response amplitude, the propagation delay and response phase still differ significantly from the normal communication state. Therefore, it is necessary to further determine the specific segments where the original propagation process has changed.

[0145] When the equipment compartment is in normal communication mode, the carrier configuration, transmit power, and probe signal form of the wireless signal are kept consistent. Multiple sets of normal propagation responses are continuously collected at eight propagation positions (P1 to P8) set along the propagation direction, and the propagation delay, response amplitude, and response phase are obtained respectively. The propagation sequence is determined according to the spatial location and propagation delay of each propagation position. Then, the propagation correlation is formed by combining the response amplitude and response phase between adjacent propagation positions, thus obtaining a normal propagation chain extending from P1 to P8, where P8 is located in the target communication area. In the normal operation record, the representative propagation delay values ​​of P3, P4, P5, and P6 are 45ns, 59ns, 74ns, and 88ns, respectively, and the representative response amplitude values ​​are -42dBm, -46dBm, -49dBm, and -52dBm, respectively, indicating that the wireless signal can form a continuous propagation response within this propagation segment.

[0146] After the internal structure of the equipment compartment changed, the current propagation responses of P1 to P8 were re-acquired while maintaining the same signal transmission method, and each current propagation response was compared with the normal propagation responses in the normal propagation chain. In the current propagation response sequence, corresponding responses could be found for P1, P2, P3, P6, P7, and P8. However, no match was found for the normal propagation responses corresponding to P4 and P5. The current propagation responses were retrieved again using the propagation positions of P4 and P5 as indices, and a second matching was performed using propagation delay, response amplitude, and response phase, respectively. Still, no current propagation response completely corresponding to the normal propagation response was obtained. Therefore, the normal propagation responses corresponding to P4 and P5 were determined to be missing propagation responses.

[0147] The search proceeds upstream and downstream along the normal propagation chain from the location of the missing propagation response. Upstream, the current propagation response corresponding to P3 is obtained first; downstream, the current propagation response corresponding to P6 is obtained first. Thus, P3 is determined as the upstream propagation location of the break interval, and P6 as the downstream propagation location of the break interval. The propagation segment between P3 and P6 is defined as the break interval. This further limits the overall communication anomaly in the target communication area to a local propagation segment, providing a clear spatial range for subsequent wireless propagation state adjustments.

[0148] Within the spatial range corresponding to the fracture interval, three candidate propagation positions (Q1, Q2, and Q3) are determined. Each candidate propagation position is equipped with an adjustable reflection device capable of independently changing the wireless propagation state. When perturbing a candidate propagation position, the signal transmission method and the wireless propagation state of the other candidate propagation positions remain unchanged; only the reflection state of the current candidate propagation position is changed. Simultaneously, the parameter values ​​before and after the change are recorded, and the current propagation response at point P6 before and after the change is collected. After data collection for each candidate propagation position is completed, it is restored to its original wireless propagation state before processing the next candidate propagation position, ensuring that the changes in propagation response generated by different candidate propagation positions correspond to each other.

[0149] Before the change in wireless propagation state, the propagation delay at P6 is approximately 96 ns, the response amplitude is approximately -66 dBm, and the response phase is approximately 146°. After changing the reflection state of Q1, the propagation delay at P6 becomes 94 ns, and the response amplitude becomes -63 dBm; after changing the reflection state of Q2, the propagation delay at P6 becomes 89 ns, the response amplitude becomes -53 dBm, and the response phase becomes 121°; after changing the reflection state of Q3, the propagation delay at P6 becomes 95 ns, the response amplitude becomes -60 dBm, and the response phase still significantly deviates from the normal communication state. A perturbation response relationship between the candidate propagation location and P6 is established by correlating the candidate propagation location, the change in wireless propagation state, and the direction and magnitude of changes in propagation delay, response amplitude, and response phase at P6.

[0150] Under normal communication conditions, the representative propagation delay of P6 corresponding to the normal propagation response is 88ns, the representative response amplitude is -52dBm, and the representative response phase is 119°. Comparing the current propagation response of P6 after the wireless propagation state changes at each candidate propagation location, it can be found that although Q1 and Q3 can improve the response amplitude, the propagation delay and response phase have not been restored simultaneously. After Q2 changes the wireless propagation state, the propagation delay of P6 is 89ns, the response amplitude is -53dBm, and the response phase is 121°. All three propagation response characteristics have re-entered the corresponding change range formed under the normal communication state of P6. Therefore, Q2 is determined as the alternative propagation location.

[0151] After determining Q2, propagation connections from P3 to Q2 and from Q2 to P6 are established according to the normal propagation chain direction, forming an alternative propagation relationship. The upstream propagation chain segment before the break interval and the downstream propagation chain segment after the break interval are retained, and the upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment are sequentially connected according to the original propagation sequence to form an alternative propagation chain reaching the target communication area P8. Simultaneously, the wireless propagation state change corresponding to the recovery match of Q2 is read from the disturbance response relationship, and the target parameter value of the reflection state recorded during this change is obtained and used as the propagation adjustment parameter corresponding to Q2. Therefore, subsequent execution processes do not require re-searching for propagation parameters.

[0152] The wireless propagation state of Q2 is changed according to the above propagation adjustment parameters, so that the wireless signal continues to be transmitted to P8 along the alternative propagation chain via Q2. Before adjustment, the propagation delay of the current propagation response at P8 is approximately 132 ns, the response amplitude is approximately -72 dBm, and the response phase is approximately 169°. Under normal communication conditions, the representative propagation delay of P8 is 119 ns, the representative response amplitude is -57 dBm, and the representative response phase is 136°. After propagation adjustment, the propagation delay of the current propagation response at P8 becomes 120 ns, the response amplitude becomes -58 dBm, and the response phase becomes 138°. All three propagation response characteristics re-enter the corresponding change range formed under normal communication conditions, thus generating a wireless signal enhancement result.

[0153] As shown in the above operation records, this invention can first determine the missing propagation response by identifying the propagation response that should appear but does not in the normal propagation chain, and further locate the abnormal propagation process to the break between P3 and P6. Then, by changing the wireless propagation states of Q1, Q2, and Q3 one by one and observing the changes in the propagation response at P6, Q2, which can restore the downstream propagation response, is determined as the alternative propagation position. After completing the local propagation chain repair using the alternative propagation relationship, the response amplitude of the target communication area P8 recovers from -72dBm to -58dBm, the propagation delay recovers from 132ns to 120ns, and the response phase recovers from 169° to 138°. This indicates that this invention can perform targeted repair on the broken local propagation segment without readjusting the entire closed space propagation structure, thereby improving the positioning accuracy, adjustment targeting, and engineering feasibility of wireless signal enhancement.

[0154] Table 1 Comparison of propagation recovery performance in target communication area under different wireless signal enhancement methods

[0155] P8 response amplitude / dBm -57 -72 -63 -61 -58 P8 propagation delay / ns 119 132 131 128 120 P8 response phase / ° 136 169 166 158 138 Difference in amplitude from normal response / dB 0 15 6 4 1 Difference in propagation delay from normal propagation (ns) 0 13 12 9 1 Phase difference from normal response / ° 0 33 30 22 2 1000 consecutive valid received frames / frame 992 853 932 951 988

[0156] As shown in Table 1, after the obstruction, the response amplitude of the target communication area P8 decreased from -57dBm to -72dBm, the propagation delay increased from 119ns to 132ns, and the response phase changed from 136° to 169°. This indicates that the communication anomaly not only manifests as signal attenuation but also involves a significant change in the propagation relationship. The traditional transmit power enhancement method can restore the response amplitude to -63dBm, but the propagation delay and response phase remain at 131ns and 166°, respectively. It mainly improves the received energy and has limited effect on restoring the original propagation relationship. The traditional fixed reflection enhancement method improves the response amplitude, propagation delay, and response phase to -61dBm, 128ns, and 158°, respectively, but there is still a significant difference from the normal communication state.

[0157] After employing the method of this invention, the response amplitude of P8 was restored to -58dBm, the propagation delay to 120ns, and the response phase to 138°, differing from the normal communication state by only 1dB, 1ns, and 2°, respectively. The number of effective received frames in 1000 consecutive communication frames reached 988, higher than the 932 frames of the traditional transmit power enhancement method and the 951 frames of the traditional fixed reflection enhancement method, and approaching the 992 frames of the normal communication state. Therefore, this invention can simultaneously improve the response amplitude, propagation delay, and response phase, making the enhanced propagation state closer to the normal propagation state.

[0158] The aforementioned performance improvement primarily stems from this invention's ability to locate broken sections by exploiting missing propagation responses. By progressively altering the wireless propagation state of candidate locations, alternative propagation positions are selected based on actual changes in the downstream propagation response within the broken section. These alternative propagation relationships are then integrated with unaffected upstream and downstream propagation links. Compared to simply increasing transmission power or employing a fixed reflection path, this invention directly repairs the broken local propagation segment, thus improving propagation recovery and continuous communication stability.

[0159] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for enhancing wireless signals in enclosed spaces, characterized in that, Includes the following steps: The spatial location and target communication area of ​​each propagation position in a confined space are obtained, the normal propagation response of each propagation position under normal communication conditions is collected, and a normal propagation chain is generated based on the propagation response characteristics and spatial location. Collect the current propagation response, match it with the normal propagation responses in the normal propagation chain, and arrange them in the order of propagation to generate the current propagation response sequence; Match the normal propagation response with the current propagation response sequence along the normal propagation chain, and determine the normal propagation response that does not match the corresponding current propagation response as the missing propagation response; Based on the missing propagation response, determine the most recent upstream and downstream current propagation responses, and determine the break interval accordingly; Within the fracture interval, candidate propagation locations are determined, and their wireless propagation states are changed sequentially. A disturbance response relationship is established based on the changes in the propagation response characteristics of the current downstream propagation response. Based on the disturbance response relationship, identify the alternative propagation location that can match the current downstream propagation response with the corresponding normal propagation response, and establish the alternative propagation relationship; The upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment are sequentially connected to generate the alternative propagation chain, and the propagation adjustment parameters corresponding to the alternative propagation position are determined. By changing the wireless propagation state of the alternative propagation location according to the propagation adjustment parameters, the wireless signal is transmitted to the target communication area along the alternative propagation chain. The current propagation response of the target communication area is matched with the corresponding normal propagation response to generate a wireless signal enhancement result.

2. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The generation of the normal propagation chain includes: Acquire the spatial location and target communication area of ​​each propagation position within a confined space, and collect the normal propagation response of each propagation position under normal communication conditions; Determine the propagation response characteristics of each normal propagation response, including propagation delay, response amplitude, and response phase; According to the spatial location of each propagation location, the normal propagation response is associated with the corresponding propagation location, and the propagation sequence of each normal propagation response is determined based on the propagation delay. Connect each normal propagation response sequentially according to the propagation order, and determine the propagation association between adjacent normal propagation responses by combining the response amplitude and response phase, and generate a normal propagation chain based on the propagation association.

3. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The generation of the current propagation response sequence includes: In the current communication state, collect the current propagation response at each propagation location and determine the propagation response characteristics of each current propagation response; Based on the propagation location and propagation response characteristics, each current propagation response is mapped to a normal propagation response in the normal propagation chain to determine the corresponding position of each current propagation response in the normal propagation chain. The current propagation responses are arranged according to their corresponding positions and propagation order in the normal propagation chain to generate a current propagation response sequence.

4. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The determination of the missing propagation response includes: Read the normal propagation responses one by one in the order of propagation along the normal propagation chain. Use the propagation position corresponding to the normal propagation response as the matching index to filter the current propagation response at the corresponding propagation position from the current propagation response sequence and generate candidate current propagation responses. The characteristic differences between the candidate current propagation response and the corresponding normal propagation response in terms of propagation delay, response amplitude, and response phase are calculated respectively. The response matching result is generated by combining the position of the candidate current propagation response in the current propagation response sequence. Based on the response matching results, candidate current propagation responses whose propagation response characteristics and arrangement positions correspond to normal propagation responses are identified as matched current propagation responses, and normal propagation responses that do not obtain matched current propagation responses are identified as propagation responses to be verified. For the propagation response to be verified, the current propagation response corresponding to its propagation position is retrieved again in the current propagation response sequence, and the propagation delay, response amplitude and response phase are used for secondary matching in turn to generate secondary matching results; Based on the results of the second-order matching, the propagation responses that still do not match the current propagation response are identified as missing propagation responses.

5. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The determination of the fracture interval includes: Determine the position of the missing propagation response in the normal propagation chain, and starting from that position, search for the propagation response upstream and downstream according to the propagation sequence of the normal propagation chain. Read the propagation positions in the normal propagation chain sequentially along the upstream direction, and find the current propagation response corresponding to the propagation position from the current propagation response sequence. The first current propagation response found is determined as the nearest current propagation response upstream. Read the propagation positions in the normal propagation chain sequentially along the downstream direction, and find the current propagation response corresponding to the propagation position from the current propagation response sequence. The first current propagation response found is determined as the nearest current propagation response downstream. The propagation position corresponding to the most recent current propagation response upstream is determined as the upstream propagation position of the fracture interval, and the propagation position corresponding to the most recent current propagation response downstream is determined as the downstream propagation position of the fracture interval. The propagation segment between the two propagation positions along the normal propagation chain is determined as the fracture interval.

6. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The establishment of the disturbance response relationship includes: Within the spatial range corresponding to the fracture interval, determine the propagation location that can change the wireless propagation state, and use the determined propagation location as a candidate propagation location. Candidate propagation locations are selected sequentially, while keeping the wireless propagation status of the remaining candidate propagation locations unchanged. The current propagation response of the downstream propagation location of the fracture section before and after the change of the wireless propagation status of the current candidate propagation location is collected. After the collection is completed, the wireless propagation status of the current candidate propagation location is restored, and then the next candidate propagation location is selected. By correlating the current propagation responses before and after the change in wireless propagation state, the direction and amount of change in propagation delay, response amplitude, and response phase are determined respectively, thus obtaining the changes in propagation response characteristics caused by the change in wireless propagation state at the current candidate propagation location. By determining the changes in wireless propagation state and propagation response characteristics for each candidate propagation location, the candidate propagation locations, the corresponding changes in wireless propagation state, and the changes in propagation response characteristics of the downstream propagation locations in the fracture section are correlated to establish the disturbance response relationship between the candidate propagation locations and the downstream propagation locations in the fracture section.

7. The wireless signal enhancement method for confined spaces according to claim 6, characterized in that, The establishment of the disturbance response relationship includes: According to the order of the wireless propagation state changes at the candidate propagation locations, each wireless propagation state change is paired with the propagation response characteristic changes at the corresponding downstream propagation locations of the fracture interval to generate a disturbance response record. The disturbance response records are associated with the corresponding candidate propagation locations, so that each candidate propagation location corresponds to the changes in the wireless propagation state and the changes in propagation response characteristics. The disturbance response records corresponding to the candidate propagation locations are collected, and each disturbance response record is associated with the downstream propagation location of the fracture interval to generate the disturbance association relationship corresponding to the candidate propagation location. The perturbation correlations corresponding to each candidate propagation location are collected, and the perturbation response relationship between the candidate propagation location and the downstream propagation location of the fracture interval is established.

8. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The establishment of the alternative propagation relationship includes: Read the changes in wireless propagation state corresponding to each candidate propagation position in the disturbance response relationship in sequence, and read the current propagation response of the downstream propagation position of the fracture interval after the corresponding wireless propagation state change. The current propagation response corresponding to each candidate propagation position is matched with the normal propagation response corresponding to the downstream propagation position of the fracture interval. The propagation delay, response amplitude and response phase are compared to generate the recovery matching result. Based on the recovery matching results, candidate propagation locations whose propagation delay, response amplitude, and response phase all match the corresponding normal propagation response are determined as alternative propagation locations; Following the propagation sequence of the normal propagation chain, a propagation connection is established between the upstream propagation location of the fracture section and the alternative propagation location, and a propagation connection is established between the alternative propagation location and the downstream propagation location of the fracture section. The two propagation connections generate an alternative propagation relationship.

9. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The determination of the propagation adjustment parameters includes: Determine the upstream propagation chain segment extending from the normal propagation chain to the upstream propagation position of the fracture interval, and determine the downstream propagation chain segment extending from the downstream propagation position of the fracture interval to the target communication area; Following the propagation sequence of the normal propagation chain, the upstream propagation chain segment, the alternative propagation relationship, and the downstream propagation chain segment are connected sequentially, so that the alternative propagation relationship connects the upstream propagation position of the fracture interval and the downstream propagation position of the fracture interval, thereby generating the alternative propagation chain; Read the change in wireless propagation state corresponding to the alternative propagation location from the disturbance response relationship; The propagation adjustment parameters corresponding to the alternative propagation location are determined based on the change in wireless propagation status.

10. The wireless signal enhancement method for confined spaces according to claim 1, characterized in that, The generation of the wireless signal enhancement result includes: The wireless propagation state of the alternative propagation location is changed according to the propagation adjustment parameters, so that the wireless signal is transmitted to the target communication area through the alternative propagation location along the alternative propagation chain; After the wireless propagation state change at the alternative propagation location is completed, the current propagation response of the target communication area is collected, and the propagation delay, response amplitude, and response phase of the current propagation response are determined. Read the normal propagation response corresponding to the target communication area from the normal propagation chain, and compare the current propagation response with the normal propagation response according to the propagation delay, response amplitude and response phase; When the propagation delay, response amplitude, and response phase of the current propagation response all match those of the normal propagation response, a wireless signal enhancement result is generated.

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