CN110392397B - Method and system for switching between wireless Access Points (APs) - Google Patents
Method and system for switching between wireless Access Points (APs) Download PDFInfo
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- CN110392397B CN110392397B CN201910697273.9A CN201910697273A CN110392397B CN 110392397 B CN110392397 B CN 110392397B CN 201910697273 A CN201910697273 A CN 201910697273A CN 110392397 B CN110392397 B CN 110392397B
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
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Abstract
The invention discloses a method and a system for switching wireless Access Points (AP), which relate to the technical field of communication and comprise the following steps: the method comprises the steps that a wireless Access Controller (AC) configures specified data types to all APs; judging whether the service data type of the drop terminal is consistent with the specified data type of the target AP or not; if the AP and the down-hanging terminal are inconsistent, comparing the signal intensity between each adjacent AP and the down-hanging terminal with a preset signal intensity threshold; acquiring each adjacent AP with the signal strength larger than a preset signal strength threshold value, recording as a signal permission adjacent AP, and comparing the specified data type of each signal permission adjacent AP with the service data type of the down-hanging terminal; and if the specified data type of any signal permission adjacent AP is consistent with the service data type of the drop terminal, the drop terminal and the corresponding signal permission adjacent AP are connected. According to the invention, the designated data types are distributed to the APs in advance, the load among the APs of the wireless access points is reasonably balanced aiming at different data types, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a system for switching between wireless Access Points (APs).
Background
With the rapid development of information technology and intelligent terminals, the application of WIFI in daily life of people becomes more and more popular, and the WIFI is widely applied to the fields of home networks, enterprise networks, public networks, smart homes, internet of things and the like and becomes an indispensable part in life and work of people; in WIFI technology, a user terminal device, such as a mobile phone, typically obtains network services by connecting to a wireless access point AP. However, the single AP has low transmitting power and high signal frequency band, so that the coverage area is not large, and the signal is easy to attenuate after passing through the wall; in order to overcome the defects, in a large building, a plurality of APs with the same SSID name and authentication encryption mode are deployed to construct a roaming network, so that a terminal can be automatically associated to the AP with better signals to enjoy a better network;
however, in a conventional WIFI network, the more devices that are hung down from the same access point, the less bandwidth resources that are allocated to each device, and when the traffic demand exceeds the available bandwidth, the throughput rate of data streams is uniformly reduced regardless of the type of data, which seriously affects the normal use of users.
Therefore, in order to ensure a satisfactory user experience, a technical solution to the above technical problem is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for switching a terminal among wireless Access Points (APs), which are used for allocating specified data types to the APs in advance, reasonably balancing the load among the APs according to different data types and improving the user experience.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the invention discloses a method for switching a terminal among wireless Access Points (AP), which comprises the following steps:
the method comprises the steps that a wireless Access Controller (AC) configures specified data types to all APs;
the target AP traverses the down-hanging terminal and judges whether the service data type of the down-hanging terminal is consistent with the specified data type of the target AP or not;
if the AP values are inconsistent, acquiring each adjacent AP of the lower-hanging terminal, and comparing the signal intensity between each adjacent AP and the lower-hanging terminal with a preset signal intensity threshold value;
acquiring each adjacent AP with the signal intensity larger than a preset signal intensity threshold value, recording as a signal permission adjacent AP, traversing each signal permission adjacent AP, and comparing the specified data type of each signal permission adjacent AP with the service data type of the under-hung terminal;
if the specified data type of any signal permission adjacent AP is consistent with the service data type of the drop terminal, the drop terminal is disconnected with the target AP under the control of a wireless Access Controller (AC) so as to be connected with the corresponding signal permission adjacent AP, otherwise, the drop terminal is connected with the target AP.
On the basis of the technical scheme, the judging whether the service data type of the drop terminal is consistent with the preset specified data type of the target AP or not comprises the following steps:
the target AP analyzes a message in the service data of the drop terminal, acquires a protocol type of the message, and acquires the service data type according to the protocol type;
and the AC compares the service data type of the drop terminal with the specified data type of the target AP.
On the basis of the above technical solution, when comparing the signal strength between each of the adjacent APs and the under-hung terminal with a preset signal strength threshold, the method includes the following steps:
the AC sends a signal strength detection instruction to each adjacent AP according to the identity information of the down-hanging terminal;
each adjacent AP responds to the signal intensity detection instruction to obtain the signal intensity of the down-hanging terminal;
the AC compares the signal strength between each of the neighboring APs and the drop terminal to the signal strength threshold.
On the basis of the above technical solution, if the drop terminal supports the 802.11KV protocol, the drop terminal is disconnected from the target AP and then allowed to connect to the adjacent AP by the corresponding signal, which specifically includes the following steps:
the connection between the lower-hanging terminal and the target AP is interrupted;
the signal permits the adjacent AP to send an 802.11KV switching request to the down-hanging terminal;
and the lower hanging terminal responds to the 802.11KV switching request and is connected with the signal permission adjacent AP.
On the basis of the above technical solution, when the connection between the downlink terminal and the target AP is interrupted and then the downlink terminal and the corresponding signal permit connection between the downlink terminal and the target AP, the method specifically includes the following steps:
the AC controls the target AP to interrupt connection with the drop terminal and controls the target AP to refuse a connection request of the drop terminal within preset time;
and the downlink terminal and the signal permission adjacent AP are connected.
On the basis of the above technical solution, if there are a plurality of the designated data types of the signal-permitted neighboring APs and the service data type of the drop terminal are consistent, the method includes the following steps:
comparing the signal intensity between each signal permission adjacent AP and the down-hanging terminal respectively;
and the connection between the lower-hanging terminal and the target AP is interrupted, and then the lower-hanging terminal is connected with the signal permission adjacent AP with the strongest signal strength.
The invention also discloses a system for switching among the wireless Access Points (AP), which is used for regulating and controlling a wireless network, wherein the wireless network comprises a wireless Access Controller (AC) and at least 2 wireless Access Points (AP), and the system comprises:
a service configuration module arranged in the AC, and used for configuring a specified data type to each AP;
the service judging module is arranged in the AC and used for acquiring the service data type of each drop-hanging terminal corresponding to the target AP from the service analyzing module and comparing the service data type with the specified data type of the target AP;
the intensity acquisition module is arranged in the AC and used for acquiring the signal intensity between the adjacent AP and the under-hung terminal from the signal detection module;
the query module is arranged in the AC and used for acquiring each adjacent AP between the downlink terminal and the downlink terminal, the signal intensity of which is greater than a preset signal intensity threshold value, recording the adjacent AP as a signal permission adjacent AP and acquiring a specified data type of each signal permission adjacent AP;
a switching module arranged in the AC, configured to control the target AP, the drop terminal, and the signal-admission-enabled neighboring AP if an assigned data type of any one of the signal-admission-enabled neighboring APs is consistent with a service data type of the drop terminal, complete an interrupted connection between the drop terminal and the target AP and a connection between the drop terminal and the signal-admission-enabled neighboring AP, and otherwise control the target AP and the drop terminal to maintain a connection;
the service analysis module is arranged in the AP and used for obtaining corresponding service data types according to the service data of each downlink terminal;
and the signal detection module is arranged in the AP and is used for detecting the signal intensity between the AP and the lower-hanging terminal.
On the basis of the above technical solution, the service analysis module is further configured to analyze a packet in the service data of the drop terminal corresponding to the AP, obtain a protocol type of the packet, and obtain the service data type according to the protocol type.
On the basis of the above technical solution, the strength acquisition module is further configured to send a signal strength detection instruction to the signal detection module of each of the adjacent APs of the downlink terminal according to the identity information of the downlink terminal;
after the signal detection module of each neighboring AP responds to the signal strength detection instruction to obtain the signal strengths of the neighboring AP and the under-hung terminal and feeds the signal strengths back to the strength acquisition module, the strength acquisition module is further configured to compare the signal strength between each neighboring AP and the under-hung terminal with the signal strength threshold.
On the basis of the above technical solution, if the drop terminal supports the 802.11KV protocol, the switching module is further configured to:
controlling the target AP and the lower-hanging terminal to be disconnected;
controlling the signal to permit the adjacent AP to send an 802.11KV switching request to the down-hanging terminal;
and the lower hanging terminal is controlled to be connected with the signal permission adjacent AP after responding to the 802.11KV switching request.
On the basis of the technical scheme, the switching module is further configured to control the target AP to interrupt connection with the drop terminal, and further control the target AP to reject a connection request of the drop terminal within a preset time;
the switching module is further configured to control the signal to permit the connection between the neighboring AP and the downlink terminal.
On the basis of the above technical solution, if there are a plurality of designated data types of the signal-enabled neighboring APs that are consistent with the service data type of the drop terminal, the switching module is further configured to compare signal strengths between each of the signal-enabled neighboring APs and the drop terminal, respectively;
the switching module is further configured to control the target AP, the drop terminal, and the signal-allowed neighboring AP, and complete the connection between the drop terminal and the target AP and the connection between the drop terminal and the signal-allowed neighboring AP with the strongest signal strength.
Compared with the prior art, the invention has the advantages that:
according to the invention, the appointed data type is distributed to each AP in advance, and the load among the wireless access points AP is reasonably divided aiming at different data types, so that the user experience is improved.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for switching between APs according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a service data determination process of a method for switching between APs in a first embodiment of the present invention;
fig. 3 is a flow chart illustrating a service data analysis of a method for switching between APs in a first embodiment of the present invention;
fig. 4 is a flowchart illustrating a signal strength detection process of a method for switching between APs according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating the steps of the KV roaming process of the method for switching between APs in a wireless access point according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating steps of a forced roaming process of a method for switching between APs according to an embodiment of the present invention;
fig. 7 is a block diagram of a switching system between APs in a second embodiment of the present invention;
in the figure: 1. a service configuration module; 2. a service judgment module; 3. an intensity acquisition module; 4. a query module; 5. a switching module; 6. a service analysis module; 7. and a signal detection module.
Detailed Description
Interpretation of terms:
AP: wireless Access Point, i.e. Wireless Access Point;
AC: wireless Access Point Controller, i.e. Wireless Controller;
RSSI: received Signal Strength Indication, i.e. Received Signal Strength Indication;
WIFI: Wi-Fi, a wireless local area network technology that is built into the IEEE 802.11 standard;
RRM: radio Resource Management, Radio Resource Management;
OSI: open System Interconnection, Open System Interconnection;
SIP: session Initiation Protocol, a Session Initiation Protocol, is a multimedia communication Protocol established by IETF (Internet Engineering Task Force);
IGMP, Internet Group Management Protocol, referred to as IGMP, is a multicast Protocol in the Internet Protocol family;
HTTP: hypertext transfer protocol.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The embodiment of the invention provides a method and a system for switching among wireless Access Points (AP). A specified data type is distributed to each AP in advance, and loads among the wireless Access Points (AP) are reasonably divided aiming at different data types, so that user experience is improved.
In order to achieve the technical effects, the general idea of the application is as follows:
a method for switching between wireless Access Points (AP), the method comprises the following steps:
firstly, configuring a specified data type to each AP by a wireless Access Controller (AC);
secondly, the target AP traverses the down-hanging terminal and judges whether the service data type of the down-hanging terminal is consistent with the specified data type of the target AP or not;
thirdly, if the AP values are inconsistent, acquiring adjacent APs of the lower-hanging terminal, and comparing the signal intensity between each adjacent AP and the lower-hanging terminal with a preset signal intensity threshold value;
step four, obtaining each adjacent AP of which the signal strength is greater than a preset signal strength threshold value, recording the adjacent AP as a signal permission adjacent AP, traversing each signal permission adjacent AP, and comparing the appointed data type of each signal permission adjacent AP with the service data type of the under-hung terminal;
and fifthly, if the specified data type of any signal permission adjacent AP is consistent with the service data type of the drop terminal, the drop terminal is disconnected with the target AP and then is connected with the corresponding signal permission adjacent AP, otherwise, the drop terminal is connected with the target AP.
It should be noted that the method for switching between wireless access points AP according to the embodiments of the present invention is mainly applied to a wireless network, where the wireless network includes a wireless access controller AC and at least two wireless access points AP.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 6, embodiment 1 of the present invention provides a method for switching between APs, where the method includes the following steps:
s1, configuring the appointed data type to each AP by the wireless access controller AC;
s2, the target AP traverses the drop terminal and judges whether the service data type of the drop terminal is consistent with the specified data type of the target AP;
s3, if the AP is inconsistent with the preset signal strength threshold, acquiring the adjacent AP of each drop terminal, and comparing the signal strength between each adjacent AP and the drop terminal with the preset signal strength threshold, otherwise, maintaining the connection between the drop terminal and the target AP;
s4, acquiring each adjacent AP with the signal strength larger than a preset signal strength threshold value, recording as a signal permission adjacent AP, and if the signal permission adjacent AP does not exist, maintaining the connection between the down-hanging terminal and the target AP;
s5, traversing each signal permission adjacent AP, and comparing the appointed data type of each signal permission adjacent AP with the service data type of the down-hanging terminal;
and S6, if the specified data type of any signal permission adjacent AP is consistent with the service data type of the drop terminal, the drop terminal and the target AP are disconnected, and then the drop terminal and the target AP are connected with the corresponding signal permission adjacent AP, otherwise, the drop terminal and the target AP are kept connected.
It should be noted that the method for switching between wireless access points AP in the embodiments of the present invention is mainly applied to a wireless network, where the wireless network includes a wireless access controller AC and at least two wireless access points AP;
during specific operation, a signal intensity threshold is preset, APs with the signal intensity of the lower-hanging terminal being above the threshold are preset, and except the current AP connected with the lower-hanging terminal, other APs can be regarded as adjacent APs of the lower-hanging terminal;
wherein each wireless access point AP has the same SSID and the same authentication settings, and there is an overlapping coverage area,
SSID is an abbreviation for Service Set Identifier, meaning: the SSID technology can divide a wireless local area network into a plurality of sub-networks which need different identity authentication, each sub-network needs independent identity authentication, and only a user who passes the identity authentication can enter the corresponding sub-network, so that unauthorized users are prevented from entering the network;
the authentication setting may specifically be authentication configuration such as a connection password;
in addition, the AP subnet refers to a network consisting of at least 2 APs.
In the embodiment of the present invention, first, a designated data type is configured to each AP by using a wireless access controller AC, where the designated data type in this step is mainly used to mark a data type preferentially processed by the AP, which can be understood as dividing work tasks of each AP in advance, where it is to be noted that the designated data type only marks the data type, that is, in various data types, a task assumed by the AP is more likely to be responsible for the data type, and the AP cannot process other data types;
furthermore, the target AP traverses the down-hanging terminals connected at the current moment and judges whether the service data type of each down-hanging terminal is consistent with the specified data type of the target AP or not;
after the service data type of the drop terminal is obtained and judged, if the service data type of the drop terminal is consistent with the specified data type of the target AP, the drop terminal and the target AP continue to maintain connection without processing;
the method comprises the following steps of judging whether the service data type of the down-hanging terminal is consistent with the preset specified data type of the target AP or not, wherein the process specifically comprises the following steps:
the target AP analyzes a message in the service data of the down-hanging terminal, acquires the protocol type of the message, and acquires the service data type according to the protocol type;
the AC compares the service data type of the down-hanging terminal with the specified data type of the target AP;
if the service data type of the drop terminal is inconsistent with the specified data type of the target AP, further acquiring adjacent APs of the drop terminal, and comparing the signal strength between each adjacent AP and the drop terminal with a preset signal strength threshold value;
acquiring each adjacent AP with the signal intensity greater than a preset signal intensity threshold value, recording as a signal permission adjacent AP, traversing each signal permission adjacent AP, acquiring an appointed data type of each signal permission adjacent AP, and comparing the appointed data type of each signal permission adjacent AP with the service data type of the down-hanging terminal;
if the specified data type of any signal permission adjacent AP is consistent with the service data type of the down-hanging terminal, namely the signal permission adjacent AP with consistent data type and consistent signal strength is more suitable for being connected with the down-hanging terminal, at the moment, the down-hanging terminal is disconnected with the target AP and is further connected with the corresponding signal permission adjacent AP;
otherwise, if any signal permits that the specified data type of the adjacent AP is not consistent with the service data type of the drop terminal, the drop terminal maintains connection with the target AP.
According to the embodiment of the invention, the appointed data type is distributed to each AP in advance, and the load among the APs of the wireless access points is reasonably divided aiming at different data types, so that the user experience is improved.
Specifically, in another embodiment of the present invention, when determining whether the service data type of the drop terminal is consistent with the preset specified data type of the target AP, the process is specifically a service data determination process, and the process specifically includes the following steps:
a1, extracting a service message sent by a drop terminal by a target AP;
a2, analyzing the service message by the target AP by using a skb operation function to obtain the protocol type of the service message;
a3, the target AP identifies the protocol type of the service message, and judges the service data type corresponding to the service message according to the protocol type;
a4, the target AP compares the self-designated data type with the service type of the down-hanging terminal and judges whether the data types are consistent;
for example, after the Protocol type is obtained through parsing, the data type corresponding to SIP (Session Initiation Protocol, which is a multimedia communication Protocol established by IETF (Internet Engineering Task Force)) is voice data, the data type corresponding to IGMP (Internet Group Management Protocol, which is a multicast Protocol in the Internet Protocol family) is video data, and the data type corresponding to HTTP (hypertext transfer Protocol, a request-response Protocol) is web page data;
the skb operation function is a Linux protocol stack skb operation function;
in addition, as shown in fig. 3, a flow chart of analyzing service data of the drop terminal is specifically provided.
In another embodiment of the present invention, when the signal strength between each neighboring AP and the downlink terminal is compared with a preset signal strength threshold, specifically, a signal strength detection process is described, as shown in fig. 4, the process includes the following steps:
b1, the AC sends a signal strength detection instruction to each adjacent AP according to the identity information of the down-hanging terminal;
b2, each adjacent AP responds to the signal strength detection instruction to obtain the signal strength of the down-hanging terminal;
b3, AC compares the signal strength between each adjacent AP and the down-hanging terminal with a signal strength threshold value;
it should be noted that the signal strength is specifically an RSSI value, and the identity information of the drop terminal may be specifically an MAC address.
It should be noted that the signal strength threshold is set according to the communication performance between the wireless access point AP and the drop terminal of the wireless network, and when the signal strength exceeds the signal strength threshold, the communication quality between the wireless access point AP and the terminal can meet the normal use requirement of the user.
In another embodiment of the present invention, if the drop terminal supports the 802.11KV protocol, the drop terminal is disconnected from the target AP, and then connected to the adjacent AP permitted by the corresponding signal, a KV roaming process may be specifically adopted, where the KV roaming process specifically includes the following steps:
c1, the AC sends a connection interruption instruction to the target AP;
c2, the target AP responds to the connection interruption instruction and interrupts connection with the lower hanging terminal;
c3, AC sends KV roaming command to signal permission adjacent AP;
c4, allowing the adjacent AP to respond to the KV roaming instruction by the signal, and sending an 802.11KV switching request to the down-hanging terminal;
and C5, the down-hanging terminal responds to the 802.11KV switching request and is connected with the adjacent AP permitted by the signal.
It should be noted that the IEEE 802.11 standard enables mutual interworking between access points and switches of different manufacturers, but it does not allow the WLAN system to access wireless resources of the client;
this deficiency limits the ability of regulatory agencies to effectively manage their networks, and thus the IEEE has organized a working group to develop a new standard, the 802.11k Radio Resource Management (RRM) standard, that improves the detection of wireless access points, client operational and environmental data, and thus improves the operational and management performance of WLANs;
802.11k focuses on two key WLAN components, namely the Access Point (AP) and the client, with the aim of enabling measurement data at one and two layers of the OSI protocol stack, namely the physical layer and the data link layer, to be used at the previous layer. This means that the upper layer can make decisions about the radio environment and determine the measurements that need to be made in that radio environment. An important feature that can be achieved by this standard is better traffic distribution. 802.11k aims to provide critical client feedback information to WLAN access points and switches, which serves to enhance the ability of the 802.11 standard to manage wireless resources;
802.11v focuses on wireless network management. The task of the method is based on the achievement obtained by 802.11k, and the basic idea of the 802.11v standard is to enable infrastructure to better control wireless terminal equipment, wherein the control of the wireless terminal equipment relates to a plurality of aspects, and a load balancing function is an important item and is also an important factor influencing wireless network deployment and transmission. Load balancing, i.e. the ability to distribute wireless terminal devices among access points according to their load conditions;
in the present case, load balancing is achieved primarily by preventing end devices from connecting to overloaded access points or ending end device sessions already connected to access points, 802.11v envisions that load balancing becomes transparent to users by directing end devices to access points with available bandwidth and resources. In the existing wireless network mechanisms, no mechanism can automatically inform the terminal device of which network the terminal device should be connected to without manually configuring the SSID and the security certificate for the terminal device, and 802.11v realizes the function of performing security terminal configuration from an infrastructure, which greatly reduces the deployment time in a large network.
In another embodiment of the present invention, when the drop terminal and the target AP interrupt connection and then allow connection with the corresponding signal to the neighboring AP, a forced roaming procedure may be specifically adopted, where the forced roaming procedure specifically includes the following steps:
d1, the AC sends a connection interruption instruction and a reconnection rejection instruction to the target AP;
d2, the target AP responds to the connection interruption instruction and the reconnection rejection instruction, interrupts connection with the down-hanging terminal and rejects the connection request of the down-hanging terminal within a preset time;
d3, the drop terminal and the signal permission adjacent AP are connected.
In another implementation manner of the embodiment of the present invention, if there are multiple signals that allow the specified data type of the neighboring AP to be consistent with the service data type of the drop terminal, the method further includes the following steps:
comparing the signal intensity between each signal permission adjacent AP and the down-hanging terminal;
the connection between the lower-hanging terminal and the target AP is interrupted, and then the lower-hanging terminal and the adjacent AP are allowed to be connected by the signal with the strongest signal intensity;
it should be noted that, at this time, the manner in which the drop terminal and the signal with the strongest signal strength permit the connection of the neighboring AP may also adopt a KV roaming procedure or a forced roaming procedure.
In addition, when the specified data type of each signal permission adjacent AP is compared with the service data type of the drop terminal, if the specified data type of any signal permission adjacent AP is consistent with the service data type of the drop terminal, and if the specified data type of the signal permission adjacent AP is consistent with the specified data type of the target AP, in order to avoid the ping-pong effect, the drop terminal is prevented from being repeatedly switched between the target AP and the signal permission adjacent AP to influence normal use, and the AC can force the drop terminal to maintain connection with the target AP, so that the drop terminal is prevented from being connected with the signal permission adjacent AP.
It should be noted that, in the mobile communication system, if the signal strength of two base stations changes dramatically in a certain area, the mobile phone will switch back and forth between the two base stations, and this situation becomes the ping-pong effect.
In another embodiment of the present invention, the specified data type includes at least video, audio, or picture.
Example two
Referring to fig. 7, an embodiment of the present invention provides a system for switching between wireless access points AP, which is used for regulating a wireless network, where the wireless network includes a wireless access controller AC and at least 2 wireless access points AP, and the system includes:
a service configuration module 1 arranged in the AC, and used for configuring the appointed data type to each AP;
the service judging module 2 is arranged in the AC and is used for acquiring the service data type of each drop terminal corresponding to the target AP from the service analyzing module 6 and comparing the service data type with the specified data type of the target AP;
the strength acquisition module 3 is arranged in the AC and is used for acquiring the signal strength between the adjacent AP and the down-hanging terminal from the signal detection module 7;
the inquiry module 4 is arranged in the AC and is used for acquiring each adjacent AP with the signal intensity between the inquiry module and the lower-hanging terminal being greater than a preset signal intensity threshold value, recording the adjacent AP as a signal permission adjacent AP and acquiring the specified data type of each signal permission adjacent AP;
a switching module 5 arranged in the AC, configured to control the target AP, the drop terminal, and the signal-enabled neighboring AP if any signal-enabled designated data type of the neighboring AP is consistent with the service data type of the drop terminal, complete the interrupted connection between the drop terminal and the target AP and the connection between the drop terminal and the signal-enabled neighboring AP, and otherwise control the target AP and the drop terminal to maintain the connection;
the service analysis module 6 is arranged in the AP and used for obtaining corresponding service data types according to the service data of each downlink terminal;
and the signal detection module 7 is arranged in the AP and is used for detecting the signal strength between the AP and the downlink terminal.
It should be noted that the method for switching between wireless access points AP in the embodiments of the present invention is mainly applied to a wireless network, where the wireless network includes a wireless access controller AC and at least two wireless access points AP;
during specific operation, a signal intensity threshold is preset, the signal intensity of the AP and the signal intensity of the AP of the lower hanging terminal are above the threshold, and except the AP currently connected with the lower hanging terminal, other APs can be regarded as adjacent APs of the lower hanging terminal;
wherein each wireless access point AP has the same SSID and the same authentication settings, and there is an overlapping coverage area,
in addition, an AP subnet refers to a network consisting of at least 2 APs.
In the embodiment of the present invention, first, a designated data type is configured to each AP by using a wireless access controller AC, where the designated data type in this step is mainly used to mark a data type preferentially processed by the AP, which can be understood as dividing work tasks of each AP in advance, where it is to be noted that the designated data type only marks the data type, that is, in various data types, a task assumed by the AP is more likely to be responsible for the data type, and the AP cannot process other data types;
furthermore, the target AP traverses the down-hanging terminals connected at the current moment and judges whether the service data type of each down-hanging terminal is consistent with the specified data type of the target AP or not;
after the service data type of the drop terminal is obtained and judged, if the service data type of the drop terminal is consistent with the specified data type of the target AP, the drop terminal and the target AP continue to maintain connection without processing;
the method comprises the following steps of judging whether the service data type of the down-hanging terminal is consistent with the preset specified data type of the target AP or not, wherein the process specifically comprises the following steps:
the target AP analyzes a message in the service data of the down-hanging terminal, acquires the protocol type of the message, and acquires the service data type according to the protocol type;
the AC compares the service data type of the down-hanging terminal with the specified data type of the target AP;
if the service data type of the drop terminal is inconsistent with the specified data type of the target AP, further acquiring adjacent APs of the drop terminal, and comparing the signal strength between each adjacent AP and the drop terminal with a preset signal strength threshold value;
acquiring each adjacent AP with the signal intensity greater than a preset signal intensity threshold value, recording as a signal permission adjacent AP, traversing each signal permission adjacent AP, acquiring an appointed data type of each signal permission adjacent AP, and comparing the appointed data type of each signal permission adjacent AP with the service data type of the down-hanging terminal;
if the specified data type of any signal permission adjacent AP is consistent with the service data type of the down-hanging terminal, namely the signal permission adjacent AP with consistent data type and consistent signal strength is more suitable for being connected with the down-hanging terminal, at the moment, the down-hanging terminal is disconnected with the target AP and is further connected with the corresponding signal permission adjacent AP;
otherwise, if any signal permits that the specified data type of the adjacent AP is not consistent with the service data type of the drop terminal, the drop terminal maintains connection with the target AP.
According to the embodiment of the invention, the appointed data type is distributed to each AP in advance, and the load among the APs of the wireless access points is reasonably divided aiming at different data types, so that the user experience is improved.
In another implementation manner in the embodiment of the present invention, the service analysis module 6 is further configured to analyze a message in the service data of the drop terminal corresponding to the AP, obtain a protocol type of the message, and obtain a service data type according to the protocol type;
during specific operation, the skb operation function can be used for analyzing the service message, acquiring the protocol type of the service message, and judging the service data type corresponding to the service message according to the protocol type;
for example, after the protocol type is obtained through analysis, the data type corresponding to the SIP is voice data, the data type corresponding to the IGMP is video data, and the data type corresponding to the HTTP is web page data;
the skb operation function is a Linux protocol stack skb operation function.
In another embodiment of the present invention, the strength obtaining module 3 is further configured to send a signal strength detection instruction to the signal detection module 7 of each adjacent AP of the downlink terminal according to the identity information of the downlink terminal;
after the signal detection module 7 of each adjacent AP responds to the signal strength detection instruction to obtain the signal strengths of the adjacent AP and the drop terminal and feed back the signal strengths to the strength acquisition module 3, the strength acquisition module 3 is further configured to compare the signal strength between each adjacent AP and the drop terminal with a signal strength threshold;
it should be noted that the signal strength is specifically an RSSI value, and the identity information of the drop terminal may be specifically an MAC address;
the signal intensity threshold is set according to the communication performance between the wireless access point AP and the down-hanging terminal of the wireless network, and when the signal intensity exceeds the signal intensity threshold, the communication quality between the wireless access point AP and the terminal can meet the normal use requirement of a user.
In another embodiment of the present invention, if the drop terminal supports the 802.11KV protocol, the switching module 5 is further configured to perform a KV roaming process, and the switching module 5 is specifically configured to:
the connection between the target AP and the lower-hanging terminal is controlled to be interrupted;
the control signal permits the adjacent AP to send an 802.11KV switching request to the down-hanging terminal;
the terminal to be hung down responds to the 802.11KV switching request, and controls the terminal to be hung down to be connected with the adjacent AP allowed by the signal;
specifically, the working process of the KV roaming process is as follows:
1. the switching module 5 sends a connection interruption instruction to the target AP;
2. the target AP responds to the connection interruption instruction and interrupts connection with the down-hanging terminal;
3. the switching module 5 sends KV roaming instruction to the signal permission adjacent AP;
4. allowing the adjacent AP to respond to the KV roaming instruction by the signal, and sending an 802.11KV switching request to the down-hanging terminal;
5. the lower hanging terminal responds to the 802.11KV switching request and is connected with the adjacent AP permitted by the signal
In another embodiment of the present invention, the switching module 5 is further configured to perform a forced roaming process, and the switching module 5 is specifically configured to:
the connection between the target AP and the down-hanging terminal is controlled to be interrupted, and then the target AP is controlled to reject the connection request of the down-hanging terminal within the preset time;
the switching module 5 is also used for controlling the signal to permit the connection between the adjacent AP and the down-hanging terminal;
specifically, the working flow of the forced roaming process is as follows:
1. the switching module 5 sends a connection interruption instruction and a reconnection rejection instruction to the target AP;
2. the target AP responds to the connection interruption instruction and the reconnection refusing instruction, interrupts connection with the down-hanging terminal and refuses the connection request of the down-hanging terminal within preset time;
3. the drop terminal is connected with the signal permission adjacent AP.
In another embodiment of the present invention, if there are multiple designated data types of the signal-enabled neighboring APs consistent with the service data type of the drop terminal, the switching module 5 is further configured to compare signal strengths between each of the signal-enabled neighboring APs and the drop terminal, respectively;
the switching module 5 is further configured to control the target AP, the drop terminal, and the signal-allowed neighboring AP, and complete the interrupted connection between the drop terminal and the target AP and the connection between the drop terminal and the signal-allowed neighboring AP with the strongest signal strength;
it should be noted that, at this time, the manner in which the drop terminal and the signal with the strongest signal strength permit the connection of the neighboring AP may also adopt a KV roaming procedure or a forced roaming procedure.
In addition, when the specified data type of each signal permission adjacent AP is compared with the service data type of the drop terminal, if the specified data type of any signal permission adjacent AP is consistent with the service data type of the drop terminal, and if the specified data type of the signal permission adjacent AP is consistent with the specified data type of the target AP, in order to avoid the ping-pong effect, the drop terminal is prevented from being repeatedly switched between the target AP and the signal permission adjacent AP to influence normal use, and the AC can force the drop terminal to maintain connection with the target AP, so that the drop terminal is prevented from being connected with the signal permission adjacent AP.
It should be noted that, in the mobile communication system, if the signal strength of two base stations changes dramatically in a certain area, the mobile phone will switch back and forth between the two base stations, and this situation becomes the ping-pong effect.
In another embodiment of the present invention, the specified data type includes at least video, audio, or picture.
Based on the same inventive concept, the present application provides an embodiment of a storage medium corresponding to the third embodiment
EXAMPLE III
A third embodiment of the invention provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out all or part of the method steps of the first embodiment.
The present invention can implement all or part of the flow in the first embodiment, and can also be implemented by using a computer program to instruct related hardware, where the computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above-mentioned method embodiments can be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
Based on the same inventive concept, the application provides an embodiment of a corresponding device, and the detailed description is given in the fourth embodiment
Example four
The fourth embodiment of the present invention further provides an apparatus, which includes a memory and a processor, the memory stores a computer program running on the processor, and the processor executes the computer program to implement all or part of the method steps in the first embodiment.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the computer device and various interfaces and lines connecting the various parts of the overall computer device.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the computer device by executing or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, video data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, server, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), servers and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method for switching between wireless Access Points (APs), the method comprising the steps of:
the method comprises the steps that a wireless Access Controller (AC) configures specified data types to all APs;
the target AP traverses the down-hanging terminal and judges whether the service data type of the down-hanging terminal is consistent with the specified data type of the target AP or not;
if the AP values are inconsistent, acquiring each adjacent AP of the lower-hanging terminal, and comparing the signal intensity between each adjacent AP and the lower-hanging terminal with a preset signal intensity threshold value;
acquiring each adjacent AP with the signal intensity larger than a preset signal intensity threshold value, recording as a signal permission adjacent AP, traversing each signal permission adjacent AP, and comparing the specified data type of each signal permission adjacent AP with the service data type of the under-hung terminal;
if the appointed data type of any signal permission adjacent AP is consistent with the service data type of the drop terminal, the drop terminal is disconnected with the target AP under the control of a wireless Access Controller (AC) so as to be connected with the corresponding signal permission adjacent AP, otherwise, the drop terminal is connected with the target AP.
2. The method according to claim 1, wherein the determining whether the service data type of the drop terminal is consistent with the preset designated data type of the target AP comprises the following steps:
the target AP analyzes a message in the service data of the drop terminal, acquires a protocol type of the message, and acquires the service data type according to the protocol type;
and the AC compares the service data type of the drop terminal with the specified data type of the target AP.
3. The method of claim 1, wherein the comparing the signal strength between each of the neighboring APs and the downlink terminal with a preset signal strength threshold comprises:
the AC sends a signal strength detection instruction to each adjacent AP according to the identity information of the down-hanging terminal;
each adjacent AP responds to the signal intensity detection instruction to obtain the signal intensity of the down-hanging terminal;
the AC compares the signal strength between each of the neighboring APs and the drop terminal to the signal strength threshold.
4. The method according to claim 1, wherein if the drop terminal supports 802.11KV protocol, the drop terminal disconnects from the target AP and further permits connection with the corresponding signal to the neighboring AP, specifically comprising the following steps:
the connection between the lower-hanging terminal and the target AP is interrupted;
the signal permits the adjacent AP to send an 802.11KV switching request to the down-hanging terminal;
and the lower hanging terminal responds to the 802.11KV switching request and is connected with the signal permission adjacent AP.
5. The method according to claim 1, wherein when the down-hanging terminal disconnects from the target AP and further connects to the neighboring AP permitted by the corresponding signal, the method specifically comprises the following steps:
the AC controls the target AP to interrupt connection with the down-hanging terminal and controls the target AP to reject the connection request of the down-hanging terminal within a preset time;
and the downlink terminal and the signal permission adjacent AP are connected.
6. The method of claim 1, wherein if there are a plurality of said signals permitting the designated data types of the neighboring APs to coincide with the traffic data types of said down-hanging terminal, said method comprises the steps of:
comparing the signal intensity between each signal permission adjacent AP and the down-hanging terminal respectively;
and the connection between the lower-hanging terminal and the target AP is interrupted, and then the lower-hanging terminal is connected with the signal permission adjacent AP with the strongest signal strength.
7. A system for switching between wireless Access Points (APs) is used for regulating and controlling a wireless network, wherein the wireless network comprises a wireless Access Controller (AC) and at least 2 APs, and the system comprises:
a service configuration module arranged in the AC, and used for configuring a specified data type to each AP;
the service judging module is arranged in the AC and used for acquiring the service data type of each drop-hanging terminal corresponding to the target AP from the service analyzing module and comparing the service data type with the specified data type of the target AP;
the strength acquisition module is arranged in the AC and is used for acquiring the signal strength between the adjacent AP and the under-hung terminal from the signal detection module;
the query module is arranged in the AC and used for acquiring each adjacent AP between the downlink terminal and the downlink terminal, the signal intensity of which is greater than a preset signal intensity threshold value, recording the adjacent AP as a signal permission adjacent AP and acquiring a specified data type of each signal permission adjacent AP;
a switching module arranged in the AC, configured to control the target AP, the drop terminal, and the signal-admission-enabled neighboring AP if an assigned data type of any one of the signal-admission-enabled neighboring APs is consistent with a service data type of the drop terminal, complete an interrupted connection between the drop terminal and the target AP and a connection between the drop terminal and the signal-admission-enabled neighboring AP, and otherwise control the target AP and the drop terminal to maintain a connection;
the service analysis module is arranged in the AP and used for obtaining corresponding service data types according to the service data of each downlink terminal;
and the signal detection module is arranged in the AP and is used for detecting the signal intensity between the AP and the lower-hanging terminal.
8. The system of claim 7, wherein:
the service analysis module is further configured to analyze a packet in the service data of the drop terminal corresponding to the AP, obtain a protocol type of the packet, and obtain the service data type according to the protocol type.
9. The system of claim 7, wherein:
the strength acquisition module is further configured to send a signal strength detection instruction to the signal detection modules of the adjacent APs of the drop terminal according to the identity information of the drop terminal;
after the signal detection module of each neighboring AP responds to the signal strength detection instruction, the signal strength between the neighboring AP and the under-hung terminal is obtained and fed back to the strength acquisition module, and the strength acquisition module is further configured to compare the signal strength between each neighboring AP and the under-hung terminal with the signal strength threshold.
10. The system of claim 7, wherein if the drop terminal supports 802.11KV protocol, the switching module is further configured to:
controlling the target AP and the lower-hanging terminal to be disconnected;
controlling the signal to permit the adjacent AP to send an 802.11KV switching request to the down-hanging terminal;
and the lower hanging terminal is controlled to be connected with the signal permission adjacent AP after responding to the 802.11KV switching request.
11. The system of claim 7, wherein the switching module is further configured to control the target AP to disconnect from the drop terminal, and further control the target AP to reject the connection request of the drop terminal within a preset time;
the switching module is further configured to control the signal to permit the connection between the neighboring AP and the downlink terminal.
12. The system according to claim 7, wherein if there are a plurality of said neighboring APs with signal permission whose assigned data types are consistent with the traffic data type of said down-hanging terminal, said switching module is further configured to compare the signal strength between each of said neighboring APs with signal permission and said down-hanging terminal;
the switching module is further configured to control the target AP, the drop terminal, and the signal-allowed neighboring AP, and complete the connection between the drop terminal and the target AP and the connection between the drop terminal and the signal-allowed neighboring AP with the strongest signal strength.
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