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CN-121985104-A - Far-field communication parameter optimization method for virtual shooting handheld terminal

CN121985104ACN 121985104 ACN121985104 ACN 121985104ACN-121985104-A

Abstract

The invention discloses a far-field communication parameter optimization method of a virtual shooting handheld terminal, which relates to the technical field of virtual shooting and comprises the following steps of S1, acquiring spatial data of signal intensity, delay distribution and packet loss rate by comprehensively scanning a communication environment in a far-field area, constructing an initial communication environment distribution map aiming at heterogeneity characteristics of different positions to obtain a preliminary division result of signal characteristics in the area, S2, carrying out space division on the far-field area according to the initial communication environment distribution map by adopting a clustering analysis method, and grouping positions with unstable signal intensity difference and delay to determine a plurality of subarea sets with different communication requirements.

Inventors

  • SHEN CHENQI
  • LI LIAN

Assignees

  • 浙江博采传媒有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. The far-field communication parameter optimization method of the virtual shooting handheld terminal is applied to the far-field communication environment of the handheld terminal in a virtual shooting field and is characterized by comprising the following steps of: S1, comprehensively scanning a communication environment in a far field region to obtain spatial data of signal intensity, delay distribution and packet loss rate, and constructing an initial communication environment distribution map aiming at heterogeneity characteristics of different positions to obtain a preliminary division result of signal characteristics in the region; S2, performing space division on a far-field area by adopting a cluster analysis method according to an initial communication environment distribution diagram, and grouping positions with unstable signal strength difference and delay to determine a plurality of subarea sets with different communication requirements; S3, specific data of picture synchronization and low-delay requirements in each sub-area are acquired aiming at the divided sub-area set, and a communication parameter configuration scheme corresponding to each sub-area is determined by analyzing characteristics of different communication requirements; S4, through deploying environment sensing nodes at the boundaries of all the subareas, relevant data of signal penetration and connection interruption are collected in real time, and dynamic signal quality feedback information is obtained aiming at the communication environment change when the handheld terminal moves across the subareas; S5, according to the dynamic signal quality feedback information, if the hand-held terminal is detected to enter a new subarea, calling a pre-established communication parameter configuration scheme, carrying out parameter switching on the characteristics of the new subarea, and judging the communication stability level after the adaptation.
  2. 2. The method for optimizing far-field communication parameters of a virtual shooting handheld terminal according to claim 1, wherein S1 comprises: Acquiring a radio frequency sampling stream in a far field region, analyzing the radio frequency sampling stream to obtain a signal strength value, a delay distribution time stamp and a packet loss rate statistic value, and mapping the signal strength value, the delay distribution time stamp and the packet loss rate statistic value into a virtual plane grid system to generate a discrete grid unit set; calculating the statistical variance and the local entropy value of the discrete grid unit set, and extracting a heterogeneous feature vector representing the instability of the communication environment; Determining the signal characteristic category to which each grid unit belongs according to the heterogeneity feature vector, and performing region filling on the discrete grid unit set according to the signal characteristic category to construct an initial communication environment distribution map so as to obtain a preliminary division result of the signal characteristics in the region.
  3. 3. The method for optimizing far-field communication parameters of a virtual shooting handheld terminal according to claim 1, wherein the step S2 comprises the following steps: Acquiring discrete grid unit data in an initial communication environment distribution diagram, and constructing a multidimensional feature vector matrix containing signal strength values and delay distribution time stamps; Calculating Euclidean distance according to the multidimensional feature vector matrix to aggregate to obtain a preliminary communication area, and screening out abnormal communication blocks with signal intensity difference mean and delay instability variance exceeding standards; acquiring a closed boundary contour of an abnormal communication block, and performing secondary segmentation on the inside of the closed boundary contour according to grid attribute density to obtain a homogenized space unit; and determining a corresponding communication resource demand type according to the statistical distribution matching communication service level model of the homogeneous space units, and outputting a subarea set with different communication demands according to the communication resource demand type.
  4. 4. The method for optimizing far-field communication parameters of a virtual shooting handheld terminal according to claim 1, wherein the step S3 comprises the following steps: Obtaining a video stream transmission log of the subarea set, and calculating jitter variance and delay distribution to obtain a service multidimensional vector; Inputting the service multidimensional vector into a demand difference analysis model, distinguishing a synchronous priority type region and an interactive priority type region, and outputting a service demand category mapping table; according to the service demand category mapping table, matching a high-order modulation coding mode for the synchronous priority type region, shortening the time slot period of the wireless frame for the interactive priority type region, and generating a candidate communication parameter combination sequence; And carrying out numerical simulation calculation on the candidate communication parameter combination sequence, locking an optimal physical layer parameter set, and outputting a communication parameter configuration scheme corresponding to each sub-region.
  5. 5. The method for optimizing far-field communication parameters of a virtual shooting handheld terminal according to claim 1, wherein the step S4 comprises the following steps: Activating boundary sensing nodes to capture edge field intensity data and a spectrum interference spectrum, and calculating a penetration loss value and an environmental attenuation factor; Mapping a penetration loss value and an environmental attenuation factor to a track coordinate positioning cross-domain switching point by combining a terminal moving track and a moving speed vector to construct a signal coverage hole model; if the density of the signal coverage cavity model exceeds the standard, extracting time-varying features to generate a quality fluctuation sequence; And establishing a dynamic feedback link according to the quality fluctuation sequence, and outputting dynamic signal quality feedback information aiming at the cross-regional movement of the handheld terminal.
  6. 6. The method for optimizing far-field communication parameters of a virtual shooting handheld terminal according to claim 1, wherein the step S5 comprises the following steps: acquiring time-varying spectrum characteristic data in dynamic signal quality feedback information, and comparing a fingerprint database to determine a new sub-region identifier; extracting a preset quadrature amplitude modulation order and a channel coding redundancy rate according to the new sub-region identification; analyzing the quadrature amplitude modulation order and the channel coding redundancy rate to reset the physical layer configuration, and completing the parameter switching aiming at the new sub-region characteristics; acquiring the switched error code distribution data and round trip delay jitter values, and calculating the deviation of the error code distribution data and the round trip delay jitter values to obtain a communication fitness score; And if the communication adaptation degree score meets the standard, measuring and calculating the anti-interference allowance level after parameter switching, and judging the communication stability level after adaptation.
  7. 7. The method for optimizing far-field communication parameters of a virtual shooting handheld terminal according to claim 1, further comprising S6, for a communication stability level after parameter switching, obtaining a real-time transmission state of the handheld terminal in a moving process by continuously monitoring index data of packet loss rate and unstable delay above a preset threshold, and determining a final communication quality optimization result, specifically comprising: Acquiring packet loss sequence and delay time stamp data with parameters being switched and higher than a preset threshold frequency, calculating the packet loss interval variance of the packet loss sequence and the fluctuation amplitude of the delay time stamp data with the parameters being switched and generating a link congestion degree feature matrix; analyzing the link congestion degree feature matrix, extracting abnormal fluctuation segments, and constructing a real-time transmission state vector by combining the physical layer retransmission request count.
  8. 8. The method for optimizing far-field communication parameters of a virtual camera handheld terminal of claim 7, wherein S6 further comprises: Mapping the real-time transmission state vector to a multidimensional stability evaluation space, and calculating the Euclidean distance between the vector modular length and a reference stable state to obtain a stability metric value; And if the stability metric is positioned in the preset convergence interval, determining a final communication quality optimization result by combining the payload throughput data.
  9. 9. The method for optimizing far-field communication parameters of a virtual shooting handheld terminal according to claim 7, further comprising S7, according to a final communication quality optimization result, if it is found that the signal strength of the sub-area is still lower than a preset threshold, acquiring fine signal distribution data by adjusting a monitoring frequency of an environment sensing node, and judging whether update adjustment is required for sub-area division, including: Acquiring a sub-region signal intensity value after optimizing communication quality, and generating a monitoring frequency multiplication instruction if the sub-region signal intensity value is lower than a preset coverage threshold value; and acquiring a refined signal distribution data set containing the space-time tag according to the monitoring frequency multiplication instruction.
  10. 10. The method for optimizing far-field communication parameters of a virtual camera handheld terminal according to claim 9, wherein the step S7 further comprises: Analyzing the refined signal distribution data set to extract the coverage connected domain, and carrying out topology mapping comparison on the coverage connected domain and the logic boundary divided by the current subarea; if the comparison result shows that the coverage connected domain crosses the logic boundary, a new boundary division coordinate sequence is generated, and updating and adjustment of sub-region division are completed.

Description

Far-field communication parameter optimization method for virtual shooting handheld terminal Technical Field The invention relates to the technical field of virtual shooting, in particular to a far-field communication parameter optimization method of a virtual shooting handheld terminal. Background Along with the wide application of virtual shooting technology in the field of film and television production, real-time data interaction between a shooting site and a virtual shooting system through a handheld terminal has become a normal state. The handheld terminal is generally used for shooting control, picture preview, parameter adjustment, state feedback and other operations, and the communication performance of the handheld terminal directly influences the synchronization effect of the virtual picture and the real scene and the stability of the shooting process. Particularly, in the background of the continuous expansion of the scale of the virtual shooting site, the communication quality of the handheld terminal in the far-field region has become an important factor restricting the shooting efficiency and the picture consistency. In the existing virtual shooting system, the far-field area is generally large in coverage area, and the communication environment is complex and changeable. The wireless signal propagation conditions of different spatial positions are obviously different under the influence of factors such as a field structure, an LED display device layout, a metal supporting structure, personnel and device movement and the like, and the problems of uneven signal intensity distribution, communication delay fluctuation, unstable packet loss rate and the like are presented. Especially, under the condition that the handheld terminal frequently moves in the field along with shooting requirements, the problems are more remarkable, and the problems are easy to cause picture delay, synchronization errors and even communication interruption, so that the overall effect of virtual shooting is affected. In the prior art, unified or static communication parameter configuration is mostly adopted aiming at a communication management mode of a virtual shooting place so as to reduce the complexity of a system. However, this configuration is generally based on the average communication condition in whole or in part, and it is difficult to cope with the difference in communication quality requirements between different locations in the far-field region. For example, locations near the main shot area generally have higher demands for low latency and high stability, while locations at the edge of the field or where there is shielding are more susceptible to signal attenuation and interference. The unified communication parameters are difficult to meet the above-mentioned differentiated requirements at the same time, which often results in insufficient communication performance of partial areas and low utilization efficiency of communication resources of other areas. In addition, in the process of transregional movement of the handheld terminal, the change of the communication environment has dynamics and burstiness, the prior art has limited sensing and response capability on the change of communication quality, and the fluctuation condition of the communication state is difficult to reflect in time. This causes communication parameter adjustment to tend to lag behind actual environmental changes, further exacerbating the problem of unstable communication in the far field region. Disclosure of Invention The invention aims to provide a far-field communication parameter optimization method of a virtual shooting handheld terminal, which solves the problems existing in the prior art. The method is characterized by comprising the steps of S1, comprehensively scanning the communication environment in a far field area to obtain spatial data of signal intensity, delay distribution and packet loss rate, constructing an initial communication environment distribution map aiming at heterogeneity characteristics of different positions to obtain a preliminary division result of the signal characteristics in the area, S2, carrying out space division on the far field area according to the initial communication environment distribution map by adopting a clustering analysis method, grouping the positions with poor signal intensity and unstable delay to determine a plurality of subarea sets with different communication requirements, S3, acquiring specific data with different picture synchronization and low delay requirements in each subarea aiming at the divided subarea sets, determining a communication parameter configuration scheme corresponding to each subarea by analyzing the characteristic of different communication requirements, S4, acquiring relevant data of signal penetration and connection in real time aiming at communication environment change of the handheld terminal area when the subarea is moved, acquiring a new communic