CN110868265A

CN110868265A - Indoor environment design method and indoor environment evaluation method

Info

Publication number: CN110868265A
Application number: CN201811034705.XA
Authority: CN
Inventors: 谭江艳; 吴贤兵; 高丽; 张红艳
Original assignee: Xiangyang Zhongcheng Testing Technology Co Ltd
Current assignee: Xiangyang Zhongcheng Testing Technology Co Ltd
Priority date: 2018-08-27
Filing date: 2018-08-27
Publication date: 2020-03-06

Abstract

An indoor environment design method and an indoor environment evaluation method are realized by including a target communication quality input section for inputting a target communication quality of indoor wireless communication, and a signal propagation characteristic calculation section for calculating a delay spread in a room. A target communication quality, a signal propagation characteristic conversion section for converting the thus calculated delay spread in the room into a delay spread in a laboratory, and an indoor environment design section for indoor designing of an indoor environment of the wireless communication. Delay spread in the laboratory, and the relationship between delay spread in the laboratory and the environment in which delay propagation is implemented in the laboratory.

Description

Indoor environment design method and indoor environment evaluation method

Technical Field

The invention relates to an indoor environment design method and an indoor environment evaluation method.

Background

In the information society of today, the construction of telecommunication infrastructure such as local area networks is an important content of indoor environment design in office spaces. Among them, wireless local area networks using wireless communication have attracted considerable attention in recent years because of greatly reduced wiring capacity in offices, relatively easy movement, and increased terminal units and the like. Therefore, the demand for wireless communication indoor environment design is increasing. As a technique for designing an indoor environment of wireless communication, there is a method of actually constructing an indoor space model by building CAD for realizing radio communication (building model), performing electromagnetic wave (EM) propagation characteristics SIMU. According to the simulation result, an indoor space model is established, and an indoor wireless communication environment is designed. However, the indoor environment design method according to the above-described related art has the following problems. That is, according to the conventional indoor environment design, an indoor wireless communication space model is actually constructed using a building CAD, and EM propagation characteristic simulation is performed in the indoor space model and the indoor environment. The radio communication system is designed based on the simulation results. Therefore, each time another indoor space that actually affects radio communication has a different state (size, etc.), another indoor space model must be constructed for the space by the architectural CAD, and EM propagation characteristic simulation must be performed in the indoor SPA. The CE model thus constructed. Therefore, a very long time is necessary for the design of the indoor environment.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned deficiencies of the prior art and to provide an indoor environment design method and an indoor environment evaluation method, which can quickly evaluate the wireless communication environment in a room.

The technical scheme of the invention is as follows: a target communication quality input step of inputting a target communication quality of the radio communication in the room; a first signal propagation characteristic calculation step of calculating a signal propagation characteristic for achieving the target communication quality in the room; a first signal propagation characteristic conversion step of converting the signal propagation characteristics in the room calculated in the first signal propagation characteristic calculation step into signal propagation at the target communication quality input in the target communication quality input step; an indoor environment designing step of designing an indoor environment based on the attribute in the laboratory of a specific size and the relationship between the signal propagation characteristic and the signal propagation in the laboratory converted in the first signal propagation characteristic converting step; properties in the laboratory and environment, the signal propagation characteristics achieved in the laboratory were obtained in the laboratory, which was preliminary experiments.

The signal propagation characteristic in the room is a delay spread during radio communication in the room; wherein the signal propagation characteristic in the laboratory is a delay spread during radio communication in the laboratory.

The environment in the room is a layout pattern of an electromagnetic wave absorbing surface or an electromagnetic wave reflecting surface in the room; the environment in the laboratory is a layout pattern of an electromagnetic wave absorbing surface or an electromagnetic wave reflecting surface in the laboratory.

The first signal propagation characteristic converting step comprises the step of converting the signal propagation characteristics in the room to signal propagation characteristics in the laboratory based on a comparison of spatial magnitudes. The size of a space in the room and the laboratory.

An indoor wireless communication environment evaluation method comprises an indoor environment input step, wherein an environment is input indoors; a second signal propagation characteristic calculation step of calculating a signal propagation characteristic in an environment corresponding to an environment among the indoor environments input in the indoor environment input ST; EP is based on the relationship between the laboratory environment of a particular size and signal propagation characteristics in the laboratory, which experiments were preliminary obtained; a second signal propagation characteristic conversion step of converting a signal propagation characteristic in the laboratory; RY, calculated in the second signal propagation characteristic calculating step, to the signal propagation characteristic in the room; and an indoor environment evaluating step of evaluating an environment in the room of the wireless communication based on the signal propagation characteristics in the room converter in the second signal propagation characteristic converting step.

The signal propagation characteristic in the room is a delay spread during radio communication in the room; the signal propagation characteristic in the laboratory is a delay spread during radio communication in the laboratory.

The invention has the beneficial effects that: the relation between the environment and the signal propagation characteristics in a specific environment in a laboratory is determined, and the signal propagation characteristics corresponding to the environment in the indoor environment are calculated. And converting the signal propagation characteristics calculated by the laboratory into indoor signal propagation characteristics and an indoor wireless communication environment according to the relation between the laboratory environment and the laboratory signal propagation characteristics. Therefore, even for another indoor space having a different state (size, etc.), it is not necessary to perform the electromagnetic wave propagation characteristic simulation for the indoor space each time. As a result, the wireless communication environment in the room can be quickly evaluated.

Drawings

Fig. 1 is a block diagram of an indoor environment design method.

Detailed Description

In fig. 1, an indoor environment designing system 1 of the present embodiment is an indoor environment designing system for designing an indoor wireless communication environment. A signal propagation characteristic calculating section 3 (first signal propagation characteristic calculating means), a signal propagation characteristic converting section 5 (first signal propagation characteristic converting means), and an indoor environment designing section 4 (indoor environment designing means). The target communication quality input unit 2 inputs a target communication quality of the indoor wireless communication as a design target. The target communication quality input section 2 inputs the data transmission rate and the average bit error rate as a target communication quality of radio communication. The data transmission rate here means the number of data bits that can be transmitted in one second. For example, a data transmission rate of 2Mbps means that two million bits of data can be transmitted in each cycle within one second. The average bit error rate refers to the amount of rate at which one error (1 bit) occurs to how many bits a transmission error occurs during transmission of a digital signal. For example, an average bit error rate of 10 bits 3 means that transmission errors occur to an average of 1000 bits at a rate of one error (1 bit). The signal propagation characteristic calculating section 3 calculates a signal propagation characteristic in a room of interest for achieving the target communication quality, based on the target communication quality input by the target communication quality input section 2. In this case, the delay spread during radio communication in the front room can be applied to the signal propagation characteristics in the room. The delay spread amount here is an amount defined by EQ (1) to be EQ (3) or less. And determining the relation between the time delay expansion of each average bit error rate and the critical transmission rate. Therefore, the signal propagation characteristic calculation section 3 calculates a delay spread for realizing the data transmission rate as a target using a relationship between the delay spread targeted for the average bit error rate and the critical transmission rate. The signal propagation characteristic conversion section 5 converts the delay spread in the room calculated by the signal propagation characteristic calculation section 3 into a signal propagation characteristic in a laboratory of a specific size. In the above laboratory, the delay spread in radio communication may be taken as a signal propagation characteristic in the laboratory. The signal propagation characteristic conversion section 5 converts the delay spread in the room into the delay spread in the laboratory based on the ratio (comparison) of the size of the indoor space to the size of the space in the laboratory. Since the height of an indoor space (e.g., a room of an office building) is a design target and is standardized to some extent in practice, the height of the space in a laboratory can be set to such a standardized height. Thus, the ratio of the size of the indoor space to the size of the laboratory space is substantially equal to the ratio between the area of the indoor space and the area of the laboratory space. Therefore, the signal propagation characteristic conversion section 16 converts the delay spread in the room into the delay spread in the laboratory based on the following EQ (5).

Claims

1. A method for designing an indoor environment is characterized in that: a target communication quality input step of inputting a target communication quality of the radio communication in the room; a first signal propagation characteristic calculation step of calculating a signal propagation characteristic for achieving the target communication quality in the room; a first signal propagation characteristic conversion step of converting the signal propagation characteristics in the room calculated in the first signal propagation characteristic calculation step into signal propagation at the target communication quality input in the target communication quality input step; an indoor environment designing step of designing an indoor environment based on the attribute in the laboratory of a specific size and the relationship between the signal propagation characteristic and the signal propagation in the laboratory converted in the first signal propagation characteristic converting step; properties in the laboratory and environment, the signal propagation characteristics achieved in the laboratory were obtained in the laboratory, which was preliminary experiments.

2. The indoor environment designing method according to claim 1, wherein: the signal propagation characteristic in the room is a delay spread during radio communication in the room; wherein the signal propagation characteristic in the laboratory is a delay spread during radio communication in the laboratory.

3. The indoor environment designing method according to claim 1, wherein: the environment in the room is a layout pattern of an electromagnetic wave absorbing surface or an electromagnetic wave reflecting surface in the room; the environment in the laboratory is a layout pattern of an electromagnetic wave absorbing surface or an electromagnetic wave reflecting surface in the laboratory.

4. The indoor environment designing method according to claim 1, wherein: the first signal propagation characteristic converting step comprises the step of converting the signal propagation characteristics in the room to signal propagation characteristics in the laboratory based on a comparison of spatial magnitudes. The size of a space in the room and the laboratory.

5. An indoor wireless communication environment evaluation method is characterized in that: comprises an indoor environment input step, wherein the environment is input in the indoor environment; a second signal propagation characteristic calculation step of calculating a signal propagation characteristic in an environment corresponding to an environment among the indoor environments input in the indoor environment input ST; EP is based on the relationship between the laboratory environment of a particular size and signal propagation characteristics in the laboratory, which experiments were preliminary obtained; a second signal propagation characteristic conversion step of converting a signal propagation characteristic in the laboratory; RY, calculated in the second signal propagation characteristic calculating step, to the signal propagation characteristic in the room; and an indoor environment evaluating step of evaluating an environment in the room of the wireless communication based on the signal propagation characteristics in the room converter in the second signal propagation characteristic converting step.

6. The indoor wireless communication environment evaluation method of claim 5, wherein: the signal propagation characteristic in the room is a delay spread during radio communication in the room; the signal propagation characteristic in the laboratory is a delay spread during radio communication in the laboratory.

7. The indoor wireless communication environment evaluation method of claim 5, wherein: the environment in the room is a layout pattern of an electromagnetic wave absorbing surface or an electromagnetic wave reflecting surface in the room; the environment in the laboratory is a layout pattern of an electromagnetic wave absorbing surface or an electromagnetic wave reflecting surface in the laboratory.