CN109219086A - It is a kind of intelligence workshop in wireless sampling apparatus cut-in method - Google Patents
It is a kind of intelligence workshop in wireless sampling apparatus cut-in method Download PDFInfo
- Publication number
- CN109219086A CN109219086A CN201710515491.7A CN201710515491A CN109219086A CN 109219086 A CN109219086 A CN 109219086A CN 201710515491 A CN201710515491 A CN 201710515491A CN 109219086 A CN109219086 A CN 109219086A
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- Prior art keywords
- sampling apparatus
- access point
- wireless
- workshop
- sampling
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/082—Load balancing or load distribution among bearers or channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/06—Access restriction performed under specific conditions based on traffic conditions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to a kind of cut-in methods of the wireless sampling apparatus in intelligent workshop, the following steps are included: arranging multiple access points and multiple wireless sampling apparatuses in the intelligent workshop；The wireless sampling apparatus calculates the load value of each access point of surrounding；The wireless sampling apparatus is based on the load value and selects access point.
Description
[technical field]
The invention belongs to the wireless sampling apparatuses in intelligent workshop and field of wireless more particularly to a kind of intelligent workshop
Cut-in method.
[background technique]
In recent years, with the development of automatic technology, the intelligence manufacture epoch are initially entered, intelligent workshop occur.Intelligence
Workshop is numerically controlled automatic equipment by network and software management system (containing production equipment, detection device, transporting equipment, machine
The all devices such as device people) realize interconnect, reach perception state (customer demand, production status, raw material, personnel, equipment,
Production technology, the information such as Environmental security), real-time data analysis, to realize automatic decision and accurate exectorial self-organizing
The workshop of the lean management boundary of production.
And in intelligent workshop, it in order to perceive state, needs to be acquired the data in workshop, it is therefore desirable to which installation is more
Collected data are passed through network transmission to workshop service device, in order to pacify whenever and wherever possible by kind sampling apparatus, sampling apparatus
Sampling apparatus is filled, present sampling apparatus all starts to minimize, and using battery power supply and wireless network connection, this gives sampling apparatus
Between output transmission come challenge.
In the prior art, common intelligent workshop wireless network uses WIFI network, and wireless sampling apparatus passes through access point
(AP) WIFI network is accessed, since arrangements various in workshop are usually more complicated, thus needs the different location cloth in workshop
Set multiple access points.In this case, a sampling apparatus nearby may have multiple access points, in the prior art sampling cartridge
Setting all is selection signal strongest access point access network, but this will lead to part access point that over-burden, is unfavorable for sampling
The data of device are transmitted.
[summary of the invention]
In order to solve the above problem in the prior art, the invention proposes the wireless sampling apparatuses in a kind of intelligent workshop
Cut-in method.
The technical solution adopted by the invention is as follows:
It is a kind of intelligence workshop in wireless sampling apparatus cut-in method, include following steps:
Step 1: arranging multiple access points and multiple wireless sampling apparatuses in the intelligent workshop；
Step 2: the wireless sampling apparatus calculates the load value of each access point of surrounding；
Step 3: the wireless sampling apparatus is based on the load value and selects access point.
Further, the sampling apparatus includes air pressure sampling apparatus, temperature acquisition apparatus, humidity sampling apparatus, ozone
Sampling apparatus.
The beneficial effect comprise that sampling apparatus is balancedly accessed between diverse access point, so that different accesses
The burden of point compares balance, and resource utilization is higher.
[Detailed description of the invention]
Described herein the drawings are intended to provide a further understanding of the invention, constitutes part of this application, but
It does not constitute improper limitations of the present invention, in the accompanying drawings:
Fig. 1 is the general frame figure in intelligent workshop of the invention；
Fig. 2 is the network connection diagram of sampling apparatus and access point of the present invention.
[specific embodiment]
Come that the present invention will be described in detail below in conjunction with attached drawing and specific embodiment, illustrative examples therein and says
It is bright to be only used to explain the present invention but not as a limitation of the invention.
With reference to attached drawing 1, it illustrates intelligence workshop system applied by the present invention, which includes multiple wireless sampling cartridges
Set with workshop service device, connected between workshop service device and each sampling apparatus by internal WIFI network, workshop service device is logical
It crosses the network to receive its data detected from these sampling apparatuses and handled, these samplings of network-control can also be passed through
Device.User is remotely connected using client by internet and workshop service device, so as to be accessed by workshop service device
With each sampling apparatus of control.The sampling apparatus for example can be air pressure sampling apparatus, temperature acquisition apparatus, humidity sampling cartridge
It sets, ozone sampling apparatus etc..
Intelligent workshop system referring to attached drawing 2, it illustrates the network connection diagram of sampling apparatus of the present invention and access point, in figure
System includes three access points (three are only an example, may have more access points in actual conditions) and multiple
Sampling apparatus (being represented in figure with small circle) is deployed in around these three access points, when sampling apparatus starting, needs to connect
To one of access point, to access internal WIFI network.It is in communication with each other between three access points by a cable network.
Cut-in method proposed by the present invention is that the lower access point access of a burden is selected by sampling apparatus, and network connects
Enter what adjustment was not executed actively by the access point for undertaking access, is distributed to what each sampling apparatus passively executed.In order to
The lower access point of burden is selected, sampling apparatus of the invention needs to consider a variety of measurement factors, specifically includes:
1) RSSI, i.e. received signal strength indication.The signal that each sampling apparatus may be located at multiple access points covers model
In enclosing, but for the same sampling apparatus, the signal strength of diverse access point be it is different, sampling apparatus is scanning
When access point, the received signal strength indication (RSSI) of each access point can be measured.Typically, the RSSI of access point is got over
Height, the link-quality between sampling apparatus and access point is better, and RSSI is lower, the link-quality between sampling apparatus and access point
Poorer, when RSSI is as low as to a certain degree, very poor link-quality will lead to very poor transmission quality, i.e. transmission can often fail,
Number of retransmissions can obviously increase, and even result in sampling apparatus and go offline.Therefore, sampling apparatus needs one when selecting access point
A acceptable minimum RSSI value, is denoted as RSSImin, the RSSIminIt is a pre-set RSSI value.
2) number of devices that access point is currently accessed.The same access point can access a large amount of equipment, access device
Quantity is to influence a key factor of access point processing capacity, and the quantity of the equipment of access is more, in order to keep each equipment
Connection, access point need to pay more resources and processing capacity.
3) data transmission rate of access point.Data transmission rate is the most important mark of access point current loads, each access
The afforded data transmission rate of point all has the upper limit, and when data transmission rate is close to the upper limit, sampling apparatus transmits data
Rate will decline rapidly, influence the transmittability of whole network.Data transmission has uplink and downlink both direction, institute of the present invention
The data transmission rate said refers to the sum of transmitting uplink data rate and downlink data transmission rate.
4) packet loss.Packet loss reflects the actual mass of a data between access point and sampling apparatus transmission, by
To the influence of the various factors such as environment, distance, signal.Packet loss of the invention mainly passes through sampling apparatus and successfully sends out to access point
The frame transmission time an of data frame is sent to measure.
The present invention carries out the access of sampling apparatus by above-mentioned 4 factors, and specific method and step is as follows:
1) when a sampling apparatus needs to access WIFI network, all access points of surrounding are scanned and obtained first.
In general, can send a claim frame when WIFI network near sampling apparatus active scan, work as access
When point receives the claim frame, a response frame can be replied, sampling apparatus passes through the response frame received, so that it may around obtaining
All access points SSID.
2) sampling apparatus obtains the RSSI of all access points of surrounding.
Sampling apparatus can measure corresponding access point by frame according to response when receiving the response frame of each access point
RSSI。
3) sampling apparatus checks whether the RSSI of each access point is greater than predefined RSSImin, it is assumed that shared n access
The RSSI of point is greater than RSSIminIf n≤1, which is directly accessed that maximum access point of RSSI, otherwise continues
Following step.
As previously mentioned, RSSIminIt is the acceptable minimum for guaranteeing link-quality, if n=1, sampling apparatus is other
Without selection, only have access greater than RSSIminOnly one access point, if n=0, illustrate nearby none access point meet
Access conditions, then sampling apparatus can only also access that maximum access point of RSSI as far as possible.
4) sampling apparatus sends load request to above-mentioned n access point, receives the access point of load request to the sampling
Device returns to the equipment sum and its data transmission rate within nearest certain time that it has been accessed.
The certain time is a unified predefined time span, is generally arranged to T hour, it is preferred that T
=1.Each access point is according to its data transmission rate of the data transmission scenarios real-time statistics of itself.
5) sampling apparatus is directed to above-mentioned n access point, the frame transmission time of measurement sampling apparatus to each access point.
Specifically, for one of access point Ai, sampling apparatus is continuously sent to it K mac frame, and access point is receiving
To after mac frame, an ACK can be replied, sampling apparatus record sends each mac frame to the time for receiving corresponding ACK, calculates this
The average value T of K timei, the TiIt is exactly sampling apparatus to access point AiFrame transmission time.
6) for above-mentioned n access point, sampling apparatus calculates separately its load value.
Specifically, it is assumed that n access point is A1, A2... ..., An, wherein AiRSSI value be set as RSSIi, that has accessed sets
Standby sum is set as Si, the data transmission rate within the certain time is Di, sampling apparatus to AiFrame transmission time be Ti.Then
The AiLoad value FiIt can be calculated by following formula:
Wherein, W1、W2、W3It is three predefined weighted values, and meets W1+W2+W3=1；
DmaxIt is all DiIn maximum value, TmaxIt is all TiIn maximum value.
7) the smallest access point of load value in n access point of sampling apparatus selection access.
After sampling apparatus accesses the smallest access point of load value, the concrete condition of each access point may become
Change, such as the number of devices of access, data transmission rate may all change, thus each access point load it is practical be also to locate
In variation.It is therefore possible to after a certain time, it is maximum that the smallest access point of load value becomes load value instead
Access point.Based on this, the access point of sampling apparatus is also required to be adjusted.According to one embodiment of present invention, it can allow and adopt
Sampling device after accessing access point the predetermined time (such as T hours, the calculating time consistency with data transmission rate) from access point off
It opens, then executes above-mentioned cut-in method again.Multiple sampling apparatuses are accessed in the same time in order to prevent, are collided, this hair
Another bright embodiment can allow sampling apparatus to disconnect from access point within T hours plus m minutes after accessing access point, then execute
State cut-in method；Wherein m is a random value.
Based on the above cut-in method, insert experiment is carried out in the Sensor Network of a wide range of complex situations, to experimental result
Statistical analysis show that compared with prior art the utilization of resources of each access point more balances, overall resource utilization is high,
The reaction speed for improving each access point balances access point load more.
The above description is only a preferred embodiment of the present invention, thus it is all according to the configuration described in the scope of the patent application of the present invention,
The equivalent change or modification that feature and principle are done, is included in the scope of the patent application of the present invention.
Claims (5)
1. a kind of cut-in method of the wireless sampling apparatus in intelligence workshop, which comprises the following steps:
Step 1: arranging multiple access points and multiple wireless sampling apparatuses in the intelligent workshop；
Step 2: the wireless sampling apparatus calculates the load value of each access point of surrounding；
Step 3: the wireless sampling apparatus is based on the load value and selects access point.
2. the cut-in method of the wireless sampling apparatus in intelligence workshop according to claim 1, which is characterized in that described to adopt
Sampling device includes air pressure sampling apparatus.
3. the cut-in method of the intelligent wireless sampling apparatus in workshop described in -2 any one according to claim 1, which is characterized in that
The sampling apparatus includes temperature acquisition apparatus.
4. the cut-in method of the wireless sampling apparatus in intelligent workshop according to claim 1 to 3, which is characterized in that
The sampling apparatus includes humidity sampling apparatus.
5. the cut-in method of the wireless sampling apparatus in intelligence workshop according to any one of claims 1-4, which is characterized in that
The sampling apparatus includes ozone sampling apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515491.7A CN109219086A (en) | 2017-06-29 | 2017-06-29 | It is a kind of intelligence workshop in wireless sampling apparatus cut-in method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515491.7A CN109219086A (en) | 2017-06-29 | 2017-06-29 | It is a kind of intelligence workshop in wireless sampling apparatus cut-in method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109219086A true CN109219086A (en) | 2019-01-15 |
Family
ID=64976437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710515491.7A Withdrawn CN109219086A (en) | 2017-06-29 | 2017-06-29 | It is a kind of intelligence workshop in wireless sampling apparatus cut-in method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109219086A (en) |
-
2017
- 2017-06-29 CN CN201710515491.7A patent/CN109219086A/en not_active Withdrawn
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20190115 |