CN105050055B

CN105050055B - Collecting method based on WIFI access point name coding

Info

Publication number: CN105050055B
Application number: CN201510498967.1A
Authority: CN
Inventors: 封兴海; 周羽波; 张余款
Original assignee: Hangzhou Delan Technology Co Ltd
Current assignee: Hangzhou Delan Technology Co Ltd
Priority date: 2015-08-14
Filing date: 2015-08-14
Publication date: 2019-02-01
Anticipated expiration: 2035-08-14
Also published as: CN105050055A

Abstract

The present invention relates to a kind of collecting methods based on WIFI access point name coding.Basic ideas of the invention are by the way of access point name encoding transmission data, beacons packet broadcast will be passed through after sensor real-time data-coding using access point name, sensing data party in request parses access point name after receiving the beacons packet of access point, obtains the sensing data of needs.Whole process of the invention does not have WIFI connection procedure, and so as to avoid the compatibility issue of WIFI connection, while beacons packet is unusual standard, and there is presently no discovery WIFI scannings compatibility issue.Also without group network process, networking stability problem is not present in entire method.

Description

Collecting method based on WIFI access point name coding

Technical field

The invention mainly relates to WIFI sensor fields, in particular to based on the data acquisition of WIFI access point name coding Method.

Background technique

Then WIFI sensor data acquisition passes through sensing data generally by some WIFI access point is connected to UDP/TCP mode is active and passive to pass data to party in request, these sensors have information collection, data processing and wireless The functions such as communication, while having WIFI compatibility issue, need gateway, and that there are number of access point is limited by WIFI, and stability is poor, The feature of networking complexity.WIFI sensor can work in the severe or particular surroundings that people can not approach, as weather monitoring, Outer space and the construction of battlefield surroundings and information acquisition system etc., can also be in floods, fire or earthquake disaster environment It plays a significant role in disaster monitoring, this kind of scene is a kind of common application model of WIFI sensor.However in this kind of scene Under, WIFI access point may be lacked, the data link stability of WIFI sensor is poor, shadow of the availability in external environment Ring lower possible degradation.External rely on of stability, ease for use, reduction for how improving WIFI sensor becomes WIFI sensing The hot issue of device research field.

Traditional WIFI sensor data acquisition agreement is based primarily upon reliable routing transmission strategy and designs, but such methods Default WIFI access point is usually required, network is pre-configured, while often data receiver and WIFI sensor need In same local area network.It is such based on routing under the extreme scenes such as network failure however, unstable in disaster, WIFI access point Strategy often seems inefficient and not applicable, and more feasible method is to use sensor as access point, then utilizes access point name Sensing data is broadcasted, as much as possible reduces dependence, significant increase stability.

Existing WIFI sensor data acquisition strategy mainly must there are still some shortcomings and an open question There need be a foreign access point, the compatible problem of WIFI access point and work station, WIFI connective stability problem, access point connects Enter quantity limitation, Network Abnormal problem etc., meeting high degree influences WIFI sensor in the compatibility of various applications, surely It is qualitative.

Goal of the invention

It is an object of the invention to for data acquisition stability in WIFI sensor network, compatibility, ease for use, go according to The problem of relying property, proposes a kind of effective technical method, on the policy grounds of forefathers' research to improve WIFI sensor network In persistent data acquisition stability, compatibility, ease for use, go dependence.

In order to reach the goals above, basic ideas of the invention are the sides using access point name encoding transmission data Formula, using access point name by, by beacons packet broadcast, sensing data party in request receives after sensor real-time data-coding Access point name is parsed after the beacons packet of access point, obtains the sensing data of needs.

The present invention the technical solution to solve the technical problem is that:

Step 1. disposes WIFI sensor:

A large amount of sensor nodes are sown in pre-monitoring region, and start access point mode.

Step 2. sensor data acquisition:

Sensor function is opened, starts to acquire data.

Step 3. data encoding:

Collected data are encoded according to coding rule, are encrypted.

Walk poly- 4. setting access point name:

It sets access point name to the data encoded, and utilizes beacons packet broadcast, while according to sensing data Carry out access point name adjustment.

Step 5. data collection:

Data requirements side open WIFI scanning, the access point name of sensor can be scanned, by access point name according to Coding rule is decoded to arrive the data of sensor.

The invention has the advantages that:

1, it avoids compatibility issue: how much there is compatibility between current access point apparatus and station device on the market Problem leads to WIFI connection failure, and the present invention does not need work station and is linked into access point, and there is presently no work occurred Station does not receive the problem of access point name, so as to avoid compatibility issue between point device and station device is entered.

2, improve stability: the present invention does not need networking, so as to avoid networking stability problem.

And the transmission of tradition WIFI data can be affected by no line pollution, as long as the present invention is not in most extreme (malice Pollute wireless network) the case where, it is substantially unaffected.

WIFI sensor network has generally required foreign access point simultaneously, and the stability influence of access point arrives whole network Stability, and the present invention does not have access point, to improve stability.

3, influence on WIFI network small: WIFI beacons transmission speed is 1Mbit/s, and length is very short, this Broadcast is very small on WIFI network influence, while WIFI sensor does not transmit other data, so generally speaking WIFI network It influences very small.

4. promoting transmission range: traditional WIFI sensor network generally requires signal strength and is better than -80DBm, Cai Nengjin The stable data transmission of row, and the present invention remains to stablize transmission in the case where signal strength -100DBm, difference 20DBm is suitable 20% or more the linear transmission distance under the conditions of promoting spaciousness.

5. being limited for acquisition side without quantity.

6. reducing third party's development difficulty: third party only needs band WIFI equipment, knows that coded format can be used, only One-way data, not complicated interaction.

Detailed description of the invention

Fig. 1 is usage scenario schematic diagram of the present invention

Specific embodiment:

Below in conjunction with attached drawing 1 and embodiment, the invention will be further described.

By taking temperature sensor as an example.

Temperature sensor with WIFI access point function is placed in the position for needing the temperature acquired, such as in water, Position table (see Table 1) corresponding with sensor sequence number, electrifying startup are established in receiving end in face.

Table 1

Sensor sequence number	Present position
		20157	Ground
20158	10 meters of high-altitudes
		20159	Under water

Sensor starts temperature collection data value, after the completion of one acquisition, opens the access point function of WIFI module.According to 2 coding rule of table encodes collected temperature data, for example vendor name is DELAN, sensor type TEMP, sequence Row number is 20157, and temperature is 26 degrees Celsius, then coding result is, CGDELANTEMP201572600000000000000N, N For check code (first ignoring practical check value in embodiment).

Table 2

Modification WIFI Access Point Name is known as CGDELANTEMP201572600000000000000N, at this time access point meeting The title of oneself is gone out by the beacons packet broadcast of WIFI standard, transmission range is adjustable according to transmission power, maximum Theoretical value is up to 800m.

The WIFI scanning function for opening sensing data receiving end, due to the beacons packet of sensor WIFI module broadcast It is complete standard, so receiving end can scan the name to sensor WIFI access point as long as in the range of signal in sensor Claim, receiving end at this time does not have quantity limitation.

After the scanning to access point name of receiving end, reception first judges whether access point name is CG beginning, if not that It abandons, then sums to 31 bytes before title, then to 62 remainders, then be converted into character, carried out with 32 byte datas Comparison, comparison unsuccessfully abandon.Then receiving end judges sensor vendor name and sensor model number, and determining is " DELAN " factory Then " TEMP " sensor of family inquires corresponding table according to sequence number and senses present position (see Table 1), to judge ground temperature Degree is 26 degrees Celsius.Then subsequent processing can be carried out.

When the collected temperature of sensor changes, such as 27 degree, temperature data is recompiled, coding knot Fruit is CGDELANTEMP201572700000000000000M, and modification WIFI Access Point Name is known as CGDELANTEMP201572700000000000000M, receiving end parsing.

Circulation executes above step, and the real time data of sensor can pass to party in request.

Whole process does not have WIFI connection procedure, so as to avoid the compatibility issue of WIFI connection, while beacons packet It is unusual standard, there is presently no discovery WIFI scannings compatibility issue.Entire method also without group network process, is not present Networking stability problem.The equipment except sensor and access point is not needed, third party's dependence is eliminated yet.beacons Packet transmission time is no more than 0.1 millisecond, has substantially no effect on wireless network.The lower data of beacons packet broadcast distance ratio WIFI connection Transmission range has more 20%, increases the use occasion of sensor.Beacons packet broadcast can be received by any number of WIFI Side receives, therefore the quantity of receiving end does not have any restrictions.As long as the Access Point Name of data receiver simply parsing sensor Title can be obtained by sensing data, and development difficulty is extremely low.

Claims

1. the collecting method based on WIFI access point name coding, it is characterised in that method includes the following steps:

Step 1. disposes WIFI sensor:

A large amount of sensor nodes are sown in pre-monitoring region, and start access point mode;

Step 2. sensor data acquisition:

Sensor function is opened, starts to acquire data;

Step 3. data encoding:

Collected data are encoded according to coding rule;

Walk poly- 4. setting access point name:

It sets access point name to the data of coding are completed in step 3, and utilizes beacons packet broadcast, while according to biography Sensor data carry out access point name adjustment;

Step 5. data collection:

Data requirements side opens WIFI scanning, and the access point name of sensor is arrived in scanning, by access point name according to coding rule It is decoded to get the data of sensor are arrived.

2. the collecting method according to claim 1 based on WIFI access point name coding, it is characterised in that: coding The communications protocol length set in rule is 32 byte, and each byte is 62 systems with character representation, and character range is 0 to 9, a To z, A to Z.

3. the collecting method according to claim 1 based on WIFI access point name coding, it is characterised in that: coding Data format in rule includes fixing head, plant code, sensor type, sensor sequence number, sensing data and verification Code.