CN113316209B

CN113316209B - WiFi roaming method and device for mobile medical care terminal

Info

Publication number: CN113316209B
Application number: CN202110578006.7A
Authority: CN
Inventors: 张锐; 纪泽涛; 蔡新星
Original assignee: Shenzhen Joyree Technology Co ltd
Current assignee: Shenzhen Joyree Technology Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2023-06-16
Anticipated expiration: 2041-05-26
Also published as: CN113316209A

Abstract

The invention provides a WiFi roaming method and device of a mobile medical terminal, comprising a system setting program, the mobile medical terminal and a WiFi ap assembly; the method comprises the steps that an optimal AP connection list of each working position is established in advance by utilizing the known area position and AP deployment information of a hospital; when the roaming switching is actively triggered, the signal intensity of each AP does not need to be compared, so that the faster roaming switching is realized, and the waiting time of medical care on abnormal network transmission is reduced; according to the distribution conditions of the AP and sickbed in the ward, the optimal connection AP of each working place is set in an equalizing mode, and network blockage of a single strong signal AP is avoided; when network faults occur, the fault AP is rapidly positioned according to the working sites of the partition numbers, and rapid problem investigation is facilitated.

Description

WiFi roaming method and device for mobile medical care terminal

Technical Field

The invention relates to the technical field of mobile communication, in particular to a WiFi roaming method and device of a mobile medical care terminal.

Background

The mobile medical care terminal (PDA, flat plate, integrated machine, mobile cart) is widely applied to medical institutions, is connected with hospital information systems (HIS, EMR and the like) through WiFi network, and extends the medical information systems to sickbeds, so that various mobile medical care applications such as mobile medical care, mobile ward round, vital sign acquisition, electronic medical record writing and the like are realized.

A typical medical ward occupies half to the entire floor area, is provided with 30-60 hospital beds, is distributed between 10-30 wards, and is provided with nurses' stations, doctor offices and hallways. To realize the WiFi signal coverage of the whole disease area, two networking modes are mainly available. One is a manner of deploying a plurality of WiFi APs (access points) plus a WiFi AC (controller) controller, and WiFi roaming is achieved by setting the APs to the same SSID and password; another is to extend WiFi signals to nurses' stations, every ward, and all areas where WiFi access is required by deploying high power WiFi base stations and introducing feeders.

At present, two main problems exist in the WiFi network of the medical institution:

(1) Due to the difference of the construction of the ward building and the WiFi network mode, and the limitation of implementation cost, the two networking modes (ap+ac and base station+feeder mode) have WiFi signal dead zones with different degrees, and because the problem of network disconnection caused by insufficient local area signal strength is one of the main reasons for influencing the mobile medical care terminal and the application user experience.

(2) For the first networking mode (ap+ac), medical care is in different ward offices, and mobile medical care terminals need to roam and switch between different APs. The WiFi chip and the wireless AP of the hospital adopted by the mobile medical care terminal are from different manufacturers, the roaming strategy has the compatibility problem of different degrees, the roaming threshold value is not reasonably set, and the problems of network transmission terminals for a long time caused by slow roaming of the terminal, connection caused by weak AP connection signals and network access are caused in practical application. The medical staff has very high working strength, and the network breaking exceeds 5 seconds, so that the medical staff can be interrupted to cause clinical complaints.

The problem that broken network can not be connected is solved, and the current treatment mode of medical care in actual work mainly comprises the following steps:

(1) A dead zone of the outgoing signal, such as from a hospital bed to a region with stronger corridor signal,

(2) And (3) manually operating the mobile medical care terminal, opening the terminal network setting, and restarting the network setting.

Both modes are long in time consumption, and the second mode has high requirements on nurse training and needs good coordination degree of nurses.

Disclosure of Invention

Aiming at the problems existing in the prior art, the invention provides a WiFi roaming method and device for a mobile medical care terminal. Establishing an optimal AP connection list of each working position in advance; when the roaming switching is actively triggered, the signal intensity of each AP does not need to be compared, so that the faster roaming switching is realized, and the waiting time of medical care on abnormal network transmission is reduced; according to the distribution conditions of the AP and sickbed in the ward, the optimal connection AP of each working place is set in an equalizing mode, and network blockage of a single strong signal AP is avoided; when network faults occur, the fault AP is rapidly positioned according to the working sites of the partition numbers, and rapid problem investigation is facilitated.

In order to achieve the above object, the present invention is specifically as follows:

the invention provides a WiFi roaming method of a mobile medical care terminal, which comprises the following steps:

s1, dividing areas and identifying positions;

s2, collecting signal intensity RSSIs of all APs in each area;

s3, establishing a mapping table of each area and the preferable AP;

s4, writing the mapping table into all the mobile medical care terminals;

s5, finding out abnormal network transmission and triggering roaming switching.

Further, in step S1, the identification position is to print the position identification information as a two-dimensional bar code label and paste it at the corresponding position.

Further, the step S2 specifically includes the following steps:

s21, counting all APs of a target SSID in the area, and naming and identifying;

s22, establishing a mapping table of each AP and the unique physical address thereof so as to find the corresponding unique physical address according to the name of the AP;

s23, detecting and recording the AP signal intensity capable of detecting the specified SSID respectively at each area position.

Further, the step S3 specifically includes the following steps:

s31, arranging the APs which can be detected at each position according to the strong signal to weak signal, and eliminating the APs with the signal intensity lower than a threshold value; if the signal intensity of all the APs at the position is lower than the threshold value, indicating that dead zones exist in the network coverage at the position, and adding the network coverage is needed;

s32, establishing mapping tables of all positions and APs meeting signal strength requirements, and setting the maximum number of APs which can be selectively connected in each place;

and S33, counting the number of the positions of the first preferred connection of each AP, and adjusting the sequence of the preferred APs to ensure that the number of the positions of each AP serving as the first preferred mapping is kept balanced.

Further, the step S4 specifically includes the following steps:

s41, importing the position and AP mapping table and the AP and unique physical address mapping table into a system setting program;

s42, the system setting program sends the position and AP mapping table and the AP and unique physical address mapping table to the mobile medical care terminal program;

s43, the mobile medical care terminal program writes the mapping table information into Flash storage, so that the mapping table information is permanently stored.

Further, the step S5 specifically includes the following steps:

s51, acquiring abnormal network transmission information through WiFi connection state or application program prompt;

s52, manually selecting or scanning a position bar code to automatically position the current position, and selectively triggering roaming switching operation;

s53, the mobile medical care terminal program queries the position and the AP mapping table according to the positioned current position information, finds out a first preferred AP, sends the queried AP unique physical address as a parameter to the WiFi module, and starts the WiFi module to reconnect the AP with the appointed physical address;

s54, if the first preferred AP is still inaccessible after successful connection, switching to a second or third AP in sequence until network transmission is normal; if all mapping APs of the location have no access to the network, the information center is notified to troubleshoot. The invention also provides a WiFi roaming device of the mobile medical care terminal, which comprises:

the system is provided with a program, a mobile medical terminal and a WiFi ap assembly;

the mobile medical terminal comprises a mobile medical terminal program, flash storage and a WiFi module;

the system setting program sends the mapping table of the position and the AP and the mapping table of the unique physical address to the mobile medical care terminal program;

the mobile medical care terminal program writes the mapping table information into Flash storage, so that the mapping table information is permanently stored;

the flash storage is used for storing a position and AP mapping table and an AP and unique physical address mapping table;

the WiFi module is used for connecting the mobile medical terminal to a network;

the WiFi ap assembly provides WiFi signals and is composed of WiFi ap devices distributed at all positions.

Further, the mobile medical terminal further comprises one or two of a camera and a positioning chip.

The technical scheme of the invention has the following beneficial effects:

the invention pre-establishes an optimal AP connection list of each working position by utilizing the known area position and AP deployment information of the hospital; when the roaming switching is actively triggered, the signal intensity of each AP does not need to be compared, so that the faster roaming switching is realized, and the waiting time of medical care on abnormal network transmission is reduced; according to the distribution conditions of the AP and sickbed in the ward, the optimal connection AP of each working place is set in an equalizing mode, and network blockage of a single strong signal AP is avoided; when network faults occur, the fault AP is rapidly positioned according to the working sites of the partition numbers, and rapid problem investigation is facilitated.

Drawings

FIG. 1 is a flow chart of steps of an embodiment of the present invention;

fig. 2 is a functional block diagram of an embodiment of the present invention.

Detailed Description

The invention will be further described with reference to the drawings and the specific examples.

The present invention will be described in detail with reference to fig. 1 to 2

The invention provides a WiFi roaming method of a mobile medical care terminal, which can be subdivided into 6 steps: as shown in fig. 1

1. Dividing a working area of a disease area and marking positions;

2. collecting signal intensity RSSIs of all APs in each working area;

3. establishing a mapping table of each working area and a preferable AP;

4. writing the mapping table into all mobile medical care terminal system settings;

5. finding out abnormal network transmission;

6. actively triggering a roaming handover.

Step 1: dividing the working area of the disease area and identifying the position

1.1, dividing all areas needing wireless connection of a mobile medical care terminal according to the architectural design of a ward; such as a nurse station, doctor's office, hospital room, treatment room, pharmacy, etc.;

1.2, carrying out position name identification on each divided area, wherein the position name identification simultaneously meets simple and visual requirements, such as identifying a bed according to numbers, namely identifying a nurse station, a treatment room and the like according to English or pinyin, wherein the number of the bed is 01, 02, 60;

1.3, optionally, printing the position identification information into a two-dimensional bar code label and pasting the two-dimensional bar code label at a position, such as a head card, so that the two-dimensional bar code can be positioned to a designated position more quickly when scanning;

step 2: collecting signal intensity RSSI of all APs in each working area

The AP, namely the wireless access point, is a creator of the wireless network and is a central node of the network; a wireless router used in a typical home or office is an AP.

2.1, counting all APs of a target SSID in a lesion area, and naming identifications such as AP1, AP2,..ap 5;

2.2, establishing a mapping table of each AP and the unique physical address thereof, and finding the corresponding unique physical address according to the name of the AP;

2.3, selecting a mobile medical care terminal or a professional third party network information intensity detection terminal, and respectively detecting and recording the AP signal intensity capable of detecting the appointed SSID at each area position divided in the step 1; for example, AP information detectable at location 01 is recorded as (AP 1, -65 dbm), (AP 2, -55 dbm), (AP 4, -70 dbm);

step 3: establishing a mapping table of each working area and the preferred AP

3.1, according to step 2, arranging the APs which can be detected at each position according to the strong signal to weak signal, and eliminating the APs with the signal strength lower than the threshold value, for example, setting the threshold value to be-90 dbm; if all APs are below the threshold at the location signal strength, indicating that there is a dead zone in the network coverage at the location, it may be necessary to increase the network coverage;

3.2, establishing mapping tables of the positions and the APs meeting the signal strength requirement, and optionally setting the number of the APs with the most optional connection in each place, such as the maximum number of 3; the mapping representation is as follows:

(01，(AP2，AP1，AP3))；

(02，(AP3，AP1，AP2))；

...

(60，(AP5，AP4))；

(HSZ，(AP4，AP2))

3.3, counting the number of the first preferred connection positions of each AP, and optionally, adjusting the sequence of the preferred APs to ensure that the number of the positions of each AP serving as the first preferred mapping is balanced as much as possible;

step 4: writing mapping tables into all mobile healthcare terminal system settings

4.1, as shown in fig. 2, designing a system setting program on a PC computer, and importing the position and the AP mapping table established in the step 3 and the AP unique address mapping table established in the step 2 into the system setting program;

4.2, the system setting program is connected with the wireless information terminal through a wired (such as a serial port and a USB) or a wireless network, and sends the position and AP mapping table and the AP and unique physical address mapping table to the mobile medical care terminal program;

4.3, the mobile medical care terminal program writes the mapping table information into Flash for storage, so that the mapping table information is permanently stored;

step 5: discovery of network transmission anomalies

5.1, when a doctor and a nurse operate the mobile medical terminal, network transmission abnormal information can be obtained through the WiFi connection state and the application program prompt;

step 6: actively triggered roaming handover

6.1, when a doctor or a nurse finds out network transmission is abnormal, the doctor or the nurse can manually select or alternatively scan the bar code of the position to automatically position the current position, and select to trigger roaming switching operation;

6.2, the mobile medical care terminal program can be positioned according to the positioned current position information (can be positioned in a hardware mode such as GPS, beidou and the like, can be positioned in a multi-signal mode, for example, can be positioned through a plurality of WiFi signals, can also be positioned through a scanning position two-dimension code or manually select the position because the user knows the position of the user), inquires the position and an AP mapping table, and finds a first preferred AP; the unique physical address of the queried AP is used as a parameter to be sent to the WiFi module, and the WiFi module is started to be reconnected with the AP with the appointed physical address;

6.3, the WiFi module is reconnected with the AP with the appointed physical address sent by the mobile terminal program;

6.4, if the network transmission is normal after the connection is successful, doctors and nurses can finish all subsequent operations of the position through the application program of the mobile terminal;

6.5, if the first preferred AP is still inaccessible after connection, switching to the second or third AP in sequence until network transmission is normal. If all mapping APs of the location have no access to the network, the information center is notified to troubleshoot.

The invention also provides a WiFi roaming device of the mobile medical care terminal, which comprises: the system is provided with a program, a mobile medical terminal and a WiFi ap assembly; the mobile medical terminal comprises a mobile medical terminal program, flash storage and a WiFi module; the system setting program sends the mapping table of the position and the AP and the mapping table of the unique physical address to the mobile medical care terminal program; the mobile medical care terminal program writes the mapping table information into Flash storage, so that the mapping table information is permanently stored; the flash storage is used for storing a position and AP mapping table and an AP and unique physical address mapping table; the WiFi module is used for connecting the mobile medical terminal to a network; the WiFi ap assembly provides WiFi signals and is composed of WiFi ap devices distributed at all positions. The mobile medical terminal also comprises one or two of a camera and a positioning chip.

The invention utilizes the known regional position information of the hospital ward and the network AP deployment information to ensure that doctors and nurses do not blindly wait passively when encountering abnormal network transmission of the mobile medical terminal, but actively trigger roaming switching, thereby reducing the medical waiting time and having the following advantages:

1. the method comprises the steps that an optimal AP connection list of each working position is established in advance by utilizing the known area position and AP deployment information of a hospital; when the roaming switching is actively triggered, the signal intensity of each AP does not need to be compared, so that the faster roaming switching is realized;

2. the optimal connection AP of each working place can be set in an equalizing mode according to the distribution condition of the AP and sickbed of a ward, and network blockage of a single strong signal AP is avoided;

3. when network faults occur, the fault AP can be rapidly positioned according to the work sites with the partition numbers, and rapid problem investigation is facilitated.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. The WiFi roaming method of the mobile medical care terminal is characterized by comprising the following steps of:

s1, dividing areas and identifying positions;

s2, collecting signal intensity RSSIs of all APs in each area;

s3, establishing a mapping table of each area and the preferable AP;

s4, writing the mapping table into all the mobile medical care terminals;

s5, detecting network transmission abnormality, and triggering roaming switching;

in step S1, the identification position is obtained by printing position identification information into a two-dimensional bar code label and pasting the two-dimensional bar code label at a corresponding position;

the step S2 specifically comprises the following steps:

s21, counting all APs of a target SSID in the area, and naming and identifying;

s22, establishing a mapping table of each AP and the unique physical address of each AP;

s23, detecting and recording the AP signal intensity capable of detecting the appointed SSID at each area position;

s31, arranging the APs which can be detected at each position according to the strong signal to weak signal, and eliminating the APs with the signal intensity lower than a threshold value; s32, establishing mapping tables of all positions and APs meeting signal strength requirements, and setting the maximum number of APs which can be selectively connected in each place;

s33, counting the number of the first preferred connection positions of each AP, and adjusting the sequence of the preferred APs to ensure that the number of the positions of each AP serving as the first preferred mapping is kept balanced;

s43, the mobile medical care terminal program writes the mapping table information into Flash for storage;

the step S5 specifically comprises the following steps:

s54, if the first preferred AP is still inaccessible after successful connection, switching to a second or third AP in sequence until network transmission is normal; if all mapping APs of the location have no access to the network, the information center is notified to troubleshoot.