CN111510965B

CN111510965B - Method and device for determining roaming threshold, wireless bridging device and storage medium

Info

Publication number: CN111510965B
Application number: CN202010009139.8A
Authority: CN
Inventors: 贺斌
Original assignee: Pulian International Co ltd
Current assignee: Pulian International Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2022-04-15
Anticipated expiration: 2040-01-06
Also published as: CN111510965A

Abstract

The invention discloses a method, a device, a wireless bridging device and a storage medium for determining a roaming threshold, wherein the method comprises the steps of obtaining a first corresponding relation between a first received signal strength indication and a first performance value and a second corresponding relation between a second received signal strength indication and a second performance value; obtaining a third corresponding relation between a third received signal strength indication and a third performance value when the first performance value reaches a maximum value; according to the first corresponding relation and the third corresponding relation, under each first received signal strength indication, a fourth corresponding relation between a fourth received signal strength indication and a fourth performance value is obtained; acquiring a fifth corresponding relation between the second received signal strength indication and the fourth received signal strength indication when the second performance value is equal to the fourth performance value; and determining the roaming threshold of the current wireless terminal equipment according to all the fifth corresponding relations. The invention can provide roaming threshold values of different wireless bridging networks, and is convenient for wireless terminal equipment to obtain optimal wireless performance.

Description

Method and device for determining roaming threshold, wireless bridging device and storage medium

Technical Field

The present invention relates to the field of wireless roaming technologies, and in particular, to a roaming threshold determining method and apparatus, a wireless bridging device, and a storage medium.

Background

The wireless bridge network is an effective way to achieve rapid expansion of network coverage, for example, after the wireless bridge device is bridged to the wireless access device, the coverage area of the network where the wireless access device is located is expanded, and the wireless terminal device can access the network in more places. The distance between the wireless bridging device and the wireless access device affects the wireless performance that the wireless terminal device can obtain from the wireless bridging device.

In a wireless bridging network, roaming behavior generally refers to a wireless terminal device switching to an appropriate wireless access device or wireless bridging device at an appropriate timing so that the wireless terminal device can obtain better wireless performance. In the prior art, a test is usually performed in a certain test network to obtain a fixed roaming threshold, and when it is determined whether to trigger the wireless terminal device to roam, the fixed roaming threshold is used as a trigger condition. For example, when the received signal strength indication of the wireless terminal device is greater than the fixed roaming threshold, the wireless terminal device is triggered to perform roaming handover.

However, in practical applications, the network environment of the wireless bridge network and the test network often has a large deviation, for example, the distance between the wireless bridge device and the wireless access device in the actual wireless bridge network is different from the distance between the wireless bridge device and the wireless access device in the test network, so that the wireless performance obtained by the wireless terminal device from the wireless bridge device in the actual wireless bridge network is different from the wireless performance obtained from the wireless bridge device in the test network. However, the prior art can only provide a roaming threshold suitable for a test network, and cannot provide a roaming threshold suitable for an actual wireless bridging network, which may result in that in some wireless bridging networks, a wireless terminal device cannot obtain optimal wireless performance.

Disclosure of Invention

Embodiments of the present invention provide a roaming threshold determining method, apparatus, wireless bridging device, and storage medium, which can provide roaming thresholds corresponding to different wireless bridging networks, so that a wireless terminal device can obtain optimal wireless performance.

In order to solve the above technical problem, in a first aspect, the present invention provides a method for determining a roaming threshold, where the method includes:

acquiring a first corresponding relation between a first received signal strength indication of a wireless bridging device relative to a wireless access device and a first performance value between the wireless bridging device and the wireless access device;

acquiring a second corresponding relation between a second received signal strength indication of a preset wireless terminal device relative to the wireless access device and a second performance value between the preset wireless terminal device and the wireless access device;

when the first performance value reaches a maximum value, acquiring a third corresponding relation between a third received signal strength indication of the preset wireless terminal device relative to the wireless bridging device and a third performance value between the preset wireless terminal device and the wireless bridging device;

according to the first corresponding relationship and the third corresponding relationship, under each first received signal strength indication, obtaining a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device;

acquiring a fifth corresponding relation between the second received signal strength indication and the fourth received signal strength indication when the second performance value is equal to the fourth performance value according to the second corresponding relation and each fourth corresponding relation;

and determining the roaming threshold of the current wireless terminal equipment according to all the fifth corresponding relations.

Further, the obtaining, according to the second corresponding relationship and each of the fourth corresponding relationships, a fifth corresponding relationship between the second received signal strength indicator and the fourth received signal strength indicator when the second performance value is equal to the fourth performance value specifically includes:

in the second corresponding relation, determining the maximum value of all the second received signal strength indications when the second performance value is 0, and obtaining a first signal strength indication;

in each of the fourth corresponding relations, determining a maximum value of all the fourth received signal strength indications when the fourth performance value is 0, and obtaining a second signal strength indication; determining the minimum value in the fourth received signal strength indication corresponding to the peak value of the fourth performance value to obtain a third signal strength indication;

in the second corresponding relation, determining a second received signal strength indication corresponding to a second performance value equal to the peak value of the fourth performance value of each fourth corresponding relation, and obtaining a fourth signal strength indication;

determining each of the fifth correspondences according to each of the fourth signal strength indications and the first signal strength indication in the second correspondences, and the second signal strength indication and the third signal strength indication in each of the fourth correspondences.

Further, the method determines each of the fifth correspondences according to the following relationship:

wherein the RSSI_BIndicating RSSI for the fourth received signal strength_DA corresponding second received signal strength indication; RSSI_1BIs the first signal strength indication; RSSI_1DIs the second signal strength indication; RSSI_0DIs the third signal strength indication; thr (Thr)_0DA peak value that is the fourth performance value; RSSI_2BIs the fourth signal strength indication; thr (Thr)_0BA peak value for the second performance value; RSSI_0BIs the peak Thr corresponding to the second performance value_0BA corresponding minimum value of the second received signal strength indication.

Further, the obtaining, according to the first corresponding relationship and the third corresponding relationship, a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device under each of the first received signal strength indications specifically includes:

determining, under each of the first received signal strength indications, the fourth received signal strength indication of the fourth correspondence according to a third received signal strength indication in the third correspondence;

determining the fourth performance value for each of the fourth received signal strength indications in the fourth mapping according to the following equation:

wherein, Thr_{RSSI_D}Indicating as RSSI for the fourth received signal strength_DThen, the corresponding fourth performance value; thr (Thr)_0AIs the maximum value of the first performance values in the first corresponding relationship; RSSI_0AWhen the first performance value Thr is_0AA corresponding minimum first received signal strength indication; RSSI_1AWhen the first performance value is 0, the maximum first received signal strength indicator corresponding to the first performance value; thr (Thr)_0CIs the maximum value of the third performance values in the third correspondence; RSSI_0CIs said third property value Thr_0CA corresponding minimum of the third received signal strength indication; RSSI_1CWhen the third performance value is 0, the corresponding maximum third rssi; RSSI_AIs the first received signal strength indication.

Further, the determining the roaming threshold of the current wireless terminal device according to all the fifth corresponding relationships specifically includes:

determining the fifth correspondence corresponding to each of the first rssi;

obtaining a sixth corresponding relation according to the fifth corresponding relation corresponding to each first received signal strength indication and each first received signal strength indication; wherein the sixth correspondence comprises a correspondence between the first RSSI, the second RSSI, and the third RSSI when the second performance value is equal to the fourth performance value.

Further, the first, second, third and fourth performance values are throughput.

Further, the first corresponding relationship, the second corresponding relationship, the third corresponding relationship and the fourth corresponding relationship are all corresponding curves, corresponding tables or corresponding functions.

In order to solve the above technical problem, in a second aspect, an apparatus for determining a roaming threshold includes:

a first obtaining module, configured to obtain a first corresponding relationship between a first received signal strength indication of a wireless bridging device relative to a wireless access device and a first performance value between the wireless bridging device and the wireless access device;

a second obtaining module, configured to obtain a second corresponding relationship between a second received signal strength indication of a preset wireless terminal device relative to the wireless access device and a second performance value between the preset wireless terminal device and the wireless access device;

a third obtaining module, configured to obtain a third corresponding relationship between a third received signal strength indication of the preset wireless terminal device relative to the wireless bridge device and a third performance value between the preset wireless terminal device and the wireless bridge device when the first performance value reaches a maximum value;

a fourth obtaining module, configured to obtain, according to the first corresponding relationship and the third corresponding relationship, a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device under each of the first received signal strength indications;

a fifth obtaining module, configured to obtain, according to the second corresponding relationship and each of the fourth corresponding relationships, a fifth corresponding relationship between the second received signal strength indicator and the fourth received signal strength indicator when the second performance value is equal to the fourth performance value;

and a determining module, configured to determine a roaming threshold of the current wireless terminal device according to all the fifth correspondences.

In order to solve the above technical problem, in a third aspect, a wireless bridging device includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and the processor implements the method for determining the roaming threshold according to any one of the first aspect when executing the computer program.

In order to solve the above technical problem, in a fourth aspect, a computer-readable storage medium includes a stored computer program, where the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the method for determining a roaming threshold according to any one of the first aspect.

The method, the apparatus, the wireless bridging device and the storage medium for determining the roaming threshold provided above can obtain the fourth corresponding relationship under each first received signal strength indication through the first to third corresponding relationships, further obtain the fifth corresponding relationship under each first received signal strength indication, and determine the roaming threshold corresponding to different wireless bridging networks. The invention realizes accurate evaluation of roaming threshold values corresponding to different wireless bridging networks, and can carry out roaming control on the wireless terminal equipment according to the roaming threshold value suitable for the current wireless bridging network even if the actual wireless bridging network is dynamically changed, so that the wireless terminal equipment can always obtain the optimal wireless performance, effectively utilize network resources and reduce the waste of the network resources. Meanwhile, the method for determining the roaming threshold obtains all the fifth corresponding relations which already comprise the corresponding roaming threshold under each wireless bridging network, and the obtained fifth corresponding relations have strong environment self-adaption capability, so that the method can be well adapted to the current wireless bridging network even if the wireless bridging network dynamically changes or the wireless bridging network is switched to other wireless bridging networks.

Drawings

FIG. 1 is a schematic diagram of a wireless attenuation performance curve of a wireless product on the market;

FIG. 2 is a flowchart illustrating a method for determining a roaming threshold according to a preferred embodiment of the present invention;

FIG. 3 is a first schematic diagram of a preferred embodiment of the first through fourth correspondences provided by the present invention;

FIG. 4 is a second schematic diagram of a preferred embodiment of the first through fourth correspondences provided by the present invention;

FIG. 5 is a schematic diagram of a fifth mapping relationship provided by the present invention;

FIG. 6 is a schematic diagram of a preferred embodiment of a sixth mapping provided by the present invention;

fig. 7 is a schematic structural diagram of a roaming threshold determination apparatus according to a preferred embodiment of the present invention;

fig. 8 is a schematic structural diagram of a preferred embodiment of a wireless bridging device provided in the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

The method for determining a roaming threshold provided in this embodiment is executed by a wireless bridging device, where the wireless bridging device may be a wireless extension device (RE), or may be a wireless device such as another wireless access device besides a bridged wireless access device.

The roaming threshold refers to a Received Signal Strength Indication (RSSI) used to trigger roaming handover of the wireless terminal device. In different wireless bridging networks, the distance between the wireless access device and the wireless bridging device may be different, the distance between the wireless terminal device and the wireless bridging device may be different, and the distance between the wireless terminal device and the wireless access device may be different, so that in different wireless bridging networks, the wireless performance obtained by the wireless terminal device directly from the wireless access device may be different, and the wireless performance obtained by the wireless terminal device from the wireless bridging device may be different. And because the wireless bridging device expands the network after acquiring the wireless performance from the wireless access device, the wireless performance acquired by the wireless terminal device from the wireless bridging device is influenced by the distance between the wireless terminal device and the wireless bridging device and the distance between the wireless bridging device and the wireless access device.

The rssi is related to the distance between two devices, and the wireless performance will change with the rssi, as shown in fig. 1, which is a schematic diagram of the wireless attenuation performance curve of a wireless product on the market. As can be seen, the distance between two devices affects the received signal strength indication obtained by the wireless product, and thus the wireless performance (or throughput as in fig. 1) obtained by the wireless product. Therefore, the roaming threshold suitable for different wireless bridging networks is different, and the roaming threshold for triggering the wireless terminal device to perform roaming handover for different wireless bridging networks is determined by considering the distance (RSSI) relationship among the wireless terminal device, the wireless bridging device and the wireless access device.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for determining a roaming threshold according to a preferred embodiment of the present invention; specifically, the method for determining the roaming threshold provided by the present invention includes:

s1, acquiring a first corresponding relation between a first received signal strength indication of a wireless bridging device relative to a wireless access device and a first performance value between the wireless bridging device and the wireless access device;

s2, acquiring a second corresponding relation between a second received signal strength indication of a preset wireless terminal device relative to the wireless access device and a second performance value between the preset wireless terminal device and the wireless access device;

s3, when the first performance value reaches a maximum value, obtaining a third corresponding relationship between a third received signal strength indication of the preset wireless terminal device relative to the wireless bridge device and a third performance value between the preset wireless terminal device and the wireless bridge device;

s4, according to the first corresponding relationship and the third corresponding relationship, under each of the first received signal strength indications, obtaining a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device;

s5, obtaining a fifth corresponding relationship between the second rssi and the fourth rssi when the second performance value is equal to the fourth performance value according to the second corresponding relationship and each of the fourth corresponding relationships;

and S6, determining the roaming threshold of the current wireless terminal device according to all the fifth corresponding relations.

It should be noted that the first correspondence, the second correspondence, and the third correspondence are generated in advance through testing, so the preset wireless terminal device in the present invention refers to a wireless terminal device used for testing to obtain the second correspondence and the third correspondence, and the first correspondence, the second correspondence, and the third correspondence may be generated by other devices, stored in the wireless bridge device, and directly read from the storage area by the wireless bridge device to obtain the first correspondence, the second correspondence, and the third correspondence. Whereas current wireless terminal devices refer to wireless terminal devices used in a real wireless bridged network.

It should be noted that the first to fourth correspondences may be a corresponding curve, a corresponding table, a corresponding function, and the like, and the following description will describe the implementation process of this embodiment by taking the first to fourth correspondences as corresponding curves and taking the wireless bridging device as an RE device as an example (hereinafter, "wireless access device" is simply referred to as "wireless AP"):

in specific implementation, a first corresponding relationship generated by a pre-test is obtained, as shown in a corresponding curve a of fig. 3, where the first corresponding relationship records a corresponding relationship between a first received signal strength indicator and a first performance value after the RE device is bridged to the wireless AP. The first performance value is that the RE equipment obtains wireless performance from the wireless AP; the first received signal strength indication is a received signal strength indication of the RE device relative to the wireless AP, which is used to represent a distance between the RE device and the wireless AP.

A second corresponding relationship generated by a preliminary test is obtained, as shown in a corresponding curve B of fig. 3, where the second corresponding relationship records a corresponding relationship between a second received signal strength indication and a second performance value when a preset wireless terminal device directly obtains wireless performance from a wireless AP. The second performance value is that the preset wireless terminal device obtains wireless performance from the wireless AP, and the second received signal strength indication is a received signal strength indication of the preset wireless terminal device relative to the wireless AP, and is used for reflecting a distance between the preset wireless terminal device and the wireless AP.

When the first performance value between the RE device and the wireless AP reaches the maximum value (i.e. the first performance value corresponding to curve a in fig. 3 is Thr)_0AThen), a third corresponding relationship generated by a preliminary test is obtained, as shown by a corresponding curve C in fig. 3, where the third corresponding relationship records when the first performance value is Thr_0AAnd then, in a preset link between the wireless terminal device and the RE device, the corresponding relationship between the third received signal strength indication and the third performance value is obtained. The third performance value is that the preset wireless terminal device obtains the wireless performance from the RE device, and the third received signal strength indication is a received signal strength indication of the preset wireless terminal device relative to the RE device, and is used for reflecting the distance between the preset wireless terminal device and the RE device.

Since the distance between the RE device and the wireless AP is uncertain in the actual wireless bridged network, that is, the RE device indicates uncertainty with respect to the first received signal of the wireless AP, the first performance value is not necessarily at Thr_0ATo (3). Therefore, it is further desired to obtain a first performance value other than Thr_0AA fourth mapping of a fourth received signal strength indication between the current wireless terminal device and the RE device to a fourth performance value. That is, for each received signal strength indication (distance) between the RE device and the wireless AP, a fourth corresponding relationship is obtained. The corresponding curve D of fig. 3 is one of the fourth correspondences. Traversing all the first received signal strength indications of the corresponding curve a, a plurality of fourth corresponding relations are obtained, and a plurality of corresponding curves similar to the corresponding curve D are obtained. Thus, a fourth correspondence relationship represents a correspondence relationship between the current wireless performance between the wireless terminal device and the RE device and the current distance between the wireless terminal device and the RE device when the distance (the first rssi) between the wireless AP and the RE device is a value.

Each fourth corresponding relation is compared with the corresponding curve B, a fifth corresponding relation between the second received signal strength indication and the fourth received signal strength indication is obtained when the second performance value is equal to the fourth performance value, and all the fifth corresponding relations can be obtained by traversing all the fourth corresponding relations. Taking the corresponding curve D in fig. 3 as an example, comparing the corresponding curve B with the corresponding curve D, and when the second performance value and the fourth performance value are both Thr1 in fig. 3, obtaining that the second RSSI1 corresponds to the fourth RSSI 2; when the second performance value and the fourth performance value are both Thr2 in fig. 3, the second RSSI3 is obtained to correspond to the fourth RSSI 4. Thus, a fifth corresponding relationship is obtained by traversing all the equal second performance values and fourth performance values, as shown by the corresponding curve E in fig. 5. Further, each fourth corresponding relationship is compared with the second corresponding relationship, so that a plurality of fifth corresponding relationships similar to the corresponding curve E are obtained.

And determining the roaming threshold of the current wireless terminal equipment according to all the fifth corresponding relations. Specifically, one fifth mapping relationship may be selected from all the fifth mapping relationships according to the first received signal strength indicator between the wireless AP and the RE device. For example, the selected fifth correspondence is a corresponding curve E, each point on the corresponding curve E represents that the wireless performance directly obtained from the wireless AP by the current wireless terminal device is the same as the wireless performance obtained by the RE device, each point on the corresponding curve E is a roaming threshold, and a certain roaming threshold can be obtained according to the RSSI value between the current wireless terminal device and the wireless AP and the RSSI value between the current wireless terminal device and the wireless AP. The space above the corresponding curve E represents that better wireless performance can be obtained when the current wireless terminal device is directly connected to the wireless AP, compared with the wireless performance obtained by connecting the RE device; the space below the corresponding curve E represents that the current wireless terminal device can obtain better wireless performance by connecting to the RE device than the wireless performance obtained by directly connecting to the wireless AP.

It should be noted that all the fifth correspondences obtained may be all stored in the wireless bridging device, and when a roaming threshold needs to be determined in a certain wireless bridging network, a target fifth corresponding relation corresponding to the current first received signal strength indication is selected according to the current first received signal strength indication between the wireless AP and the RE device, for example, the corresponding curve E in fig. 5. Acquiring current second received signal strength indication RSSI5 between the current wireless terminal equipment and the wireless AP, acquiring current fourth received signal strength indication RSSI6 between the current wireless terminal equipment and the RE equipment, if the RSSI5 and the RSSI6 are determined to be point C in the graph 5, it is indicated that the current wireless terminal equipment is connected with the wireless AP to obtain better wireless performance, and if the current wireless terminal equipment is connected with the wireless AP, roaming switching is not required to be triggered, and the wireless AP continues to be connected; if the current wireless terminal device is connected with the RE device, roaming switching needs to be controlled, and the current wireless terminal device is controlled to roam to be connected with the wireless AP.

It should be noted that, for each fifth corresponding relationship, the second received signal strength indication and the fourth received signal strength indication corresponding to each other may be determined by obtaining the equal second performance value and the fourth performance value one by one. All corresponding second and fourth rssi in the fifth mapping relationship may also be obtained quickly by a certain rule.

The wireless performance shown in fig. 1 is a throughput, and the first to fourth performance values shown in fig. 3 and 4 are throughput, but the first to fourth performance values are not limited to throughput, and may be any value as long as the wireless performance between devices can be reflected.

According to the method for determining the roaming threshold, the fourth corresponding relation under each first received signal strength indication can be obtained through the first corresponding relation to the third corresponding relation, the fifth corresponding relation under each first received signal strength indication is further obtained, and the roaming threshold corresponding to different wireless bridging networks is determined. The invention realizes accurate evaluation of roaming threshold values corresponding to different wireless bridging networks, and can carry out roaming control on the wireless terminal equipment according to the roaming threshold value suitable for the current wireless bridging network even if the actual wireless bridging network is dynamically changed, so that the wireless terminal equipment can always obtain the optimal wireless performance, effectively utilize network resources and reduce the waste of the network resources. Meanwhile, the method for determining the roaming threshold obtains all the fifth corresponding relations which already comprise the corresponding roaming threshold under each wireless bridging network, and the obtained fifth corresponding relations have strong environment self-adaption capability, so that the method can be well adapted to the current wireless bridging network even if the wireless bridging network dynamically changes or the wireless bridging network is switched to other wireless bridging networks.

It should be noted that, in the method for determining a roaming threshold provided by the present invention, the fifth corresponding relationship simultaneously considers the wireless performance obtained by the wireless terminal device connecting to the wireless AP and the RE device respectively, and compared with the prior art that only the wireless performance obtained by the wireless terminal device from the currently connected wireless AP or RE device is considered and the wireless performance obtained by the wireless terminal device from other roaming targets is not considered, when the roaming threshold is determined by the fifth corresponding relationship obtained by the present invention, the roaming effect can be ensured, and the wireless terminal device is ensured to obtain better wireless performance.

It should be noted that, in the above description, only the candidate connection devices of the wireless terminal device are described as one wireless access device and one wireless bridge device, but a method for determining the roaming threshold provided by the present invention is not only applicable to a network with only 2 candidate connection devices, but also applicable to a network with a plurality of candidate connection devices. When used in a network having a plurality of candidate connected devices, one method is to set the fifth correspondence relationship as a multidimensional correspondence relationship, for example, the correspondence curve E is set as a high-dimensional spatial correspondence curve, but the correspondence relationship between each two dimensions is still determined by the implementation process of the 2 candidate connected device embodiments described above. Another method is that every 2 candidate devices determine the fifth corresponding relationship through the implementation process of the above embodiment, and when in use, pairwise comparison of the fifth corresponding relationship is performed to select the most appropriate roaming threshold.

Preferably, the obtaining a fifth corresponding relationship between the second received signal strength indication and the fourth received signal strength indication when the second performance value is equal to the fourth performance value according to the second corresponding relationship and each of the fourth corresponding relationships specifically includes:

In order to obtain the fifth correspondence relationship simply and quickly, in the present embodiment, several key rssi values are used to determine all corresponding second and fourth rssi values in the fifth correspondence relationship.

Specifically, taking the corresponding curve D shown in fig. 4 as an example, a process of obtaining a fifth corresponding relationship from the fourth corresponding relationship and the second corresponding relationship is described:

in the corresponding curve B, the maximum value of all the second received signal strength indicators when the second performance value is 0 is determined, and the first signal strength indicator, i.e. the RSSI in fig. 4, is obtained_1B。

At the corresponding curveD, determining the maximum value of all the fourth received signal strength indicators when the fourth performance value is 0, and obtaining the second signal strength indicator, i.e. the RSSI in fig. 4_1D。

In the corresponding curve D, the peak Thr of the fourth performance value is determined_0DA corresponding fourth received signal strength indication, the third signal strength indication, i.e. the RSSI in fig. 4, is obtained_0D。

In the corresponding curve B, the peak Thr corresponding to the fourth performance value of the corresponding curve D is determined_0DEqual second performance value Thr_2BCorresponding second received signal strength indication, a fourth signal strength indication, i.e. RSSI in fig. 4, is obtained_2B。

It is anticipated that there will be RSSI's in the fifth correspondence that correspond to each other_1BAnd RSSI_1DAnd corresponding RSSI_0DAnd RSSI_2B. RSSI according to the fourth signal strength indication in the corresponding curve B_2BAnd a first signal strength indication RSSI_1BAnd a second signal strength indication RSSI corresponding to curve D_1DAnd a third signal strength indication RSSI_0DAnd determining a fifth corresponding relationship. All the fourth corresponding relations determine a fifth corresponding relation according to the process, and all the fifth corresponding relations can be obtained.

It should be noted that, since there are several fourth correspondences, there are also several fourth signal strength indicators determined according to the peak values of the fourth performance values of the fourth correspondences in the second correspondences.

In this embodiment, all corresponding second rssi and fourth rssi in the fifth mapping relationship can be determined quickly according to the first to fourth rssi. The fifth correspondence is obtained without comparing all of the equal second and fourth performance values in the second and fourth correspondences.

Preferably, the method determines each of the fifth correspondences according to the following relationship:

Specifically, in this embodiment, the corresponding relationship between the second RSSI and the fourth RSSI is determined according to the above-mentioned relation, and a fifth corresponding relationship as shown in a corresponding curve E of fig. 5 can be obtained, wherein the coordinate of the point a is (RSSI)_1D，RSSI_1B) The coordinates of point B are (RSSI)_0D，RSSI_2B). Of course, correspondence in the form of a correspondence table or the like may be obtained.

Preferably, the obtaining, according to the first corresponding relationship and the third corresponding relationship, a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device under each of the first received signal strength indications specifically includes:

wherein, Thr_{RSSI_D}Indicating as RSSI for the fourth received signal strength_DThen, the corresponding fourth performance value; thr (Thr)_0AIs the maximum value of the first performance values in the first corresponding relationship; RSSI_0AWhen the first performance value Thr is_0AA corresponding minimum first received signal strength indication; RSSI_1AWhen the first performance value is 0, the maximum first received signal strength indicator corresponding to the first performance value; thr (Thr)_0CIs the maximum value of the third performance values in the third correspondence; RSSI_0CIs said third property value Thr_0CA corresponding minimum of the third received signal strength indication; RSSI_1CWhen the third performance value is 0, the corresponding maximum third rssi; RSSI_AIs the first received signal strength indication; RSSI_AIs the first received signal strength indication.

Specifically, since the RE device is bridged on the wireless AP, and the network is expanded after the wireless performance of the wireless AP is obtained, in different wireless bridged networks, a fourth corresponding relationship between the wireless terminal device and the RE device is affected by the first corresponding relationship, and mainly a peak value of a fourth performance value in the fourth corresponding relationship is affected by the first performance value, for example, as shown in a point D (RSSI7, Thr3) shown in fig. 3, when the fourth corresponding relationship is obtained under the first interface signal strength indication RSSI7, the peak value of the fourth performance value of the fourth corresponding relationship is limited to the first performance value Thr3 corresponding to the first interface signal strength indication RSSI 7. And the other fourth performance values except the peak value of the fourth performance value in the fourth corresponding relationship are similar to the third performance value, and the performance values corresponding to different signal strength values are determined according to the formula, so as to generate fourth performance information.

As can be seen from the above equation, RSSI is indicated for the received signal at the first time_ANext, obtaining a fourth corresponding relation, and obtaining a peak value Thr of a fourth performance value of the fourth corresponding relation_D-maxComprises the following steps:

wherein, Thr_0AIs the maximum value, Thr, of the first performance value of the first correspondence_0CIs the maximum value of the first performance value of the first corresponding relation, RSSI_0AThe first performance value in the first corresponding relation is Thr_0AMinimum first received signal strength indication, RSSI, of the time_1AThe first received signal strength indicator is the largest first received signal strength indicator when the first performance value in the first corresponding relation is 0.

It should be noted that the peak Thr of the fourth performance value of the fourth correspondence relationship_D-maxLimited to the first received signal strength indication RSSI_AThe peak Thr of the fourth performance value of the fourth correspondence_D-maxAnd a fourth performance value Thr_{RSSI_D}Is a simplified model.

Preferably, the determining the roaming threshold of the current wireless terminal device according to all the fifth corresponding relationships specifically includes:

determining the fifth correspondence corresponding to each of the first rssi;

In this embodiment, after all the fifth correspondences are obtained, in order to facilitate searching, a sixth correspondence is further generated according to all the fifth correspondences.

In a specific implementation, the fifth corresponding relationship corresponding to each first rssi is determined, and specifically, since each fourth corresponding relationship is associated with one first rssi and each fifth corresponding relationship is associated with one fourth corresponding relationship, the fifth corresponding relationship corresponding to each first rssi can be determined by the fourth corresponding relationship. Since the fifth mapping relationship includes the second rssi and the fourth rssi, a sixth mapping relationship among the first rssi, the second rssi, and the third rssi can be obtained according to all the first rssi and the corresponding fifth mapping relationship.

It should be noted that, if the first to fourth correspondences are all corresponding curves, and the fifth correspondences are also corresponding curves, the sixth correspondences will be a corresponding curved surface, as shown in fig. 6. It should be noted that, each point on the corresponding curved surface represents that the wireless performance obtained by the wireless terminal device directly from the wireless AP is the same as the wireless performance obtained by the wireless terminal device through the RE device; each point in the upper space of the corresponding curved surface represents that the wireless performance obtained by the wireless terminal device directly from the wireless AP is better than the wireless performance obtained by the wireless terminal device through the RE device; each point in the closed space below the corresponding curved surface represents that the wireless terminal device obtains better wireless performance through the RE device than the wireless terminal device directly from the wireless AP. When the corresponding curved surface is used specifically, as long as the first received signal strength indication, the second received signal strength indication and the fourth received signal strength in the current wireless bridge network are obtained, the corresponding roaming threshold value can be searched for on the corresponding curved surface.

Preferably, the first, second, third and fourth performance values are throughput.

Preferably, the first corresponding relationship, the second corresponding relationship, the third corresponding relationship and the fourth corresponding relationship are corresponding curves, corresponding tables or corresponding functions.

The invention provides a method for determining a roaming threshold, which comprises the following steps: acquiring a first corresponding relation between a first received signal strength indication of a wireless bridging device relative to a wireless access device and a first performance value between the wireless bridging device and the wireless access device; acquiring a second corresponding relation between a second received signal strength indication of a preset wireless terminal device relative to the wireless access device and a second performance value between the preset wireless terminal device and the wireless access device; when the first performance value reaches a maximum value, acquiring a third corresponding relation between a third received signal strength indication of the preset wireless terminal device relative to the wireless bridging device and a third performance value between the preset wireless terminal device and the wireless bridging device; according to the first corresponding relationship and the third corresponding relationship, under each first received signal strength indication, obtaining a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device; acquiring a fifth corresponding relation between the second received signal strength indication and the fourth received signal strength indication when the second performance value is equal to the fourth performance value according to the second corresponding relation and each fourth corresponding relation; and determining the roaming threshold of the current wireless terminal equipment according to all the fifth corresponding relations.

Moreover, according to the method for determining the roaming threshold provided by the present invention, the fifth corresponding relationship simultaneously considers the wireless performance obtained by the wireless terminal device connecting to the wireless AP and the RE device, and compared with the prior art that only the wireless performance obtained by the wireless terminal device from the currently connected wireless AP or RE device is considered and the wireless performance obtained by the wireless terminal device from other roaming targets is not considered, when the roaming threshold is determined according to the fifth corresponding relationship obtained by the present invention, the roaming effect can be ensured, and the wireless terminal device can obtain better wireless performance.

Example two

Fig. 7 shows a schematic structural diagram of a roaming threshold determining apparatus according to a second embodiment of the present invention, where fig. 7 is a schematic structural diagram of a roaming threshold determining apparatus according to a second embodiment of the present invention; the device comprises:

a first obtaining module 11, configured to obtain a first corresponding relationship between a first received signal strength indication of a wireless bridging device relative to a wireless access device and a first performance value between the wireless bridging device and the wireless access device;

a second obtaining module 12, configured to obtain a second corresponding relationship between a second received signal strength indication of a preset wireless terminal device relative to the wireless access device and a second performance value between the preset wireless terminal device and the wireless access device;

a third obtaining module 13, configured to obtain a third corresponding relationship between a third received signal strength indication of the preset wireless terminal device relative to the wireless bridge device and a third performance value between the preset wireless terminal device and the wireless bridge device when the first performance value reaches a maximum value;

a fourth obtaining module 14, configured to obtain, according to the first corresponding relationship and the third corresponding relationship, a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device under each of the first received signal strength indications;

a fifth obtaining module 15, configured to obtain, according to the second corresponding relationship and each of the fourth corresponding relationships, a fifth corresponding relationship between the second rssi and the fourth rssi when the second performance value is equal to the fourth performance value;

a determining module 16, configured to determine a roaming threshold of the current wireless terminal device according to all the fifth correspondences.

Preferably, the fifth obtaining module 15 specifically includes:

a first obtaining unit, configured to determine, in the second correspondence, a maximum value among all the second received signal strength indications when the second performance value is 0, and obtain a first signal strength indication;

a second obtaining unit, configured to determine, in each of the fourth corresponding relationships, a maximum value of all the fourth received signal strength indications when the fourth performance value is 0, and obtain a second signal strength indication; determining the minimum value in the fourth received signal strength indication corresponding to the peak value of the fourth performance value to obtain a third signal strength indication;

a third obtaining unit, configured to determine, in the second correspondence, a second received signal strength indication corresponding to a second performance value equal to a peak value of the fourth performance value of each of the fourth correspondences, and obtain a fourth signal strength indication;

a determining unit, configured to determine each fifth corresponding relationship according to each fourth signal strength indication and the first signal strength indication in the second corresponding relationship, and the second signal strength indication and the third signal strength indication in each fourth corresponding relationship.

Preferably, the determining unit determines each of the fifth correspondences according to the following relationship:

Preferably, the fourth obtaining module 14 specifically includes:

a fourth RSSI determining unit for determining RSSI at each of the first RSSI units_ADetermining the fourth rssi of the fourth mapping according to a third rssi in the third mapping;

a fourth performance value determining unit, configured to determine the fourth performance value corresponding to each of the fourth rssi in the fourth mapping relationship according to the following formula:

wherein, Thr_{RSSI_D}Indicating as RSSI for the fourth received signal strength_DThen, the corresponding fourth performance value; thr (Thr)_0AIs the maximum value of the first performance values in the first corresponding relationship; RSSI_0AWhen the first performance value Thr is_0ACorresponding minimumA first received signal strength indication of (a); RSSI_1AWhen the first performance value is 0, the maximum first received signal strength indicator corresponding to the first performance value; thr (Thr)_0CIs the maximum value of the third performance values in the third correspondence; RSSI_0CIs said third property value Thr_0CA corresponding minimum of the third received signal strength indication; RSSI_1CWhen the third performance value is 0, the corresponding maximum third rssi; RSSI_AIs the first received signal strength indication; RSSI_AIs the first received signal strength indication.

Preferably, the determining module 16 is specifically configured to:

determining the fifth correspondence corresponding to each of the first rssi;

The device for determining the roaming threshold provided by the invention can obtain the fourth corresponding relation under each first received signal strength indication through the first corresponding relation to the third corresponding relation, further obtain the fifth corresponding relation under each first received signal strength indication, and determine the roaming threshold corresponding to different wireless bridging networks. The invention realizes accurate evaluation of roaming threshold values corresponding to different wireless bridging networks, and can carry out roaming control on the wireless terminal equipment according to the roaming threshold value suitable for the current wireless bridging network even if the actual wireless bridging network is dynamically changed, so that the wireless terminal equipment can always obtain the optimal wireless performance, effectively utilize network resources and reduce the waste of the network resources. Meanwhile, the device for determining the roaming threshold obtains all the fifth corresponding relations which already comprise the corresponding roaming threshold under each wireless bridging network, and the obtained fifth corresponding relations have strong environment self-adaption capability, so that the device can be well adapted to the current wireless bridging network even if the wireless bridging network dynamically changes or the wireless bridging network is switched to other wireless bridging networks.

Moreover, according to the apparatus for determining a roaming threshold provided by the present invention, the fifth corresponding relationship simultaneously considers the wireless performance obtained by the wireless terminal device connecting to the wireless AP and the RE device, and compared with the prior art that only the wireless performance obtained by the wireless terminal device from the currently connected wireless AP or RE device is considered and the wireless performance obtained by the wireless terminal device from other roaming targets is not considered, when the roaming threshold is determined according to the fifth corresponding relationship obtained by the present invention, the roaming effect can be ensured, and the wireless terminal device can obtain better wireless performance.

It should be noted that the device for determining a roaming threshold provided in the embodiment of the present invention is configured to execute the steps of the method for determining a roaming threshold described in any one of the embodiments, and working principles and beneficial effects of the two are in one-to-one correspondence, so that details are not repeated.

It will be understood by those skilled in the art that the schematic diagram of the roaming threshold value determining apparatus is merely an example of the roaming threshold value determining apparatus, and does not constitute a limitation of the roaming threshold value determining apparatus, and may include more or less components than those shown, or some components may be combined, or different components, for example, the roaming threshold value determining apparatus may further include an input-output device, a network access device, a bus, etc.

EXAMPLE III

Fig. 8 shows a schematic structural diagram of a wireless bridging device according to a preferred embodiment of the present invention, where fig. 8 is a schematic structural diagram of a wireless bridging device according to a third embodiment of the present invention; in particular, the wireless bridging device comprises a processor 10, a memory 20 and a computer program stored in the memory and configured to be executed by the processor, and the processor, when executing the computer program, implements the method for determining the roaming threshold as provided in any one of the above embodiments.

Specifically, the processor and the memory in the wireless bridging device may be one or more, and the wireless bridging device may be any device that can be used for roaming control, such as a router, an RE device, or a wireless AP.

The wireless bridging device of the present embodiment includes: a processor, a memory, and a computer program (such as computer program 1, computer program 2, … … in fig. 8) stored in the memory and operable on the processor. When the processor executes the computer program, the steps in the roaming threshold determination method provided in any one of the above embodiments are implemented, for example, in step S6 shown in fig. 2, the roaming threshold of the current wireless terminal device is determined according to all the fifth correspondences; alternatively, the processor, when executing the computer program, implements the functions of the modules in the foregoing device embodiments, for example, implements the determining module 16, configured to determine the roaming threshold of the current wireless terminal device according to all the fifth correspondences.

Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program in the wireless bridging device. For example, the computer program may be divided into a first obtaining module 11, a second obtaining module 12, a third obtaining module 13, a fourth obtaining module 14, a fifth obtaining module 15 and a determining module 16, and each module has the following specific functions:

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, which is the control center of the wireless bridging device and connects the various parts of the entire wireless bridging device using various interfaces and lines.

The memory may be used to store the computer programs and/or modules, and the processor may implement the various functions of the wireless bridging device by running or executing the computer programs and/or modules stored in the memory and invoking the 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, a phonebook, etc.) created according to the use of the cellular phone, and the like. 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 Media 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.

Wherein, the integrated module/unit of the wireless bridging device can be stored in a computer readable storage medium if it is implemented in the form of software functional unit and sold or used as a stand-alone product. Based on such understanding, all or part of the flow of the method for determining the roaming threshold provided in any one of the above embodiments may also be implemented by a computer program that can be stored in a computer-readable storage medium and that, when being executed by a processor, can implement the steps of the method for determining the roaming threshold provided in any one of the above embodiments. 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 the computer program code, recording medium, usb 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 medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

Example four

In this embodiment, the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where the computer program, when running, controls an apparatus where the computer-readable storage medium is located to perform the method for determining a roaming threshold value as provided in any one of the above embodiments.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A method for determining a roaming threshold, the method comprising:

determining a roaming threshold of the current wireless terminal device according to all the fifth corresponding relations;

wherein, according to the first corresponding relationship and the third corresponding relationship, obtaining, under each of the first received signal strength indications, a fourth corresponding relationship between a fourth received signal strength indication of the current wireless terminal device relative to the wireless bridge device and a fourth performance value between the current wireless terminal device and the wireless bridge device specifically includes:

wherein, Thr_{RSSI_D}Indicating as RSSI for the fourth received signal strength_DWhen, corresponding to the fourth propertyAn energy value; thr (Thr)_0AIs the maximum value of the first performance values in the first corresponding relationship; RSSI_0AWhen the first performance value Thr is_0AA corresponding minimum first received signal strength indication; RSSI_1AWhen the first performance value is 0, the maximum first received signal strength indicator corresponding to the first performance value; thr (Thr)_0CIs the maximum value of the third performance values in the third correspondence; RSSI_0CIs said third property value Thr_0CA corresponding minimum of the third received signal strength indication; RSSI_1CWhen the third performance value is 0, the corresponding maximum third rssi; RSSI_AIs the first received signal strength indication.

2. The method of claim 1, wherein the obtaining a fifth correlation between the second rssi and the fourth rssi when the second performance value is equal to the fourth performance value according to the second correlation and each of the fourth correlations specifically comprises:

3. The method for determining a roaming threshold as claimed in claim 2, wherein the method determines each of the fifth correspondences according to the following relationship:

4. The method for determining a roaming threshold as claimed in claim 1, wherein the determining a roaming threshold of the current wireless terminal device according to all the fifth correspondences specifically includes:

determining the fifth correspondence corresponding to each of the first rssi;

5. The method of roaming threshold determination of claim 1, wherein the first, second, third and fourth performance values are throughput.

6. The method of determining a roaming threshold of claim 1, wherein the first correspondence, the second correspondence, the third correspondence, and the fourth correspondence are each a correspondence curve, a correspondence table, or a correspondence function.

7. An apparatus for determining a roaming threshold, the apparatus comprising:

a determining module, configured to determine a roaming threshold of the current wireless terminal device according to all the fifth correspondences;

the fourth obtaining module is specifically configured to:

8. A wireless bridging device comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the method of determining a roaming threshold as claimed in any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the method for determining a roaming threshold as claimed in any one of claims 1 to 6.