CN105120497B - A kind of wireless communications method and system - Google Patents

Abstract

The invention provides a wireless communication method and system. The wireless communication method includes: setting a control channel frequency and N transmission channel frequencies, and the N transmission channel frequencies are named as the first transmission channel frequency to the Nth transmission channel frequency according to the frequency from low to high; The control channel connection of the wireless communication terminal of the other party; establishing the transmission channel connection with the wireless communication terminal of the other party with the Nth transmission channel frequency; adjusting the frequency of the established transmission channel: detecting the received signal strength indicator value of the established transmission channel, when receiving When the signal strength indicator value is less than the set value, send the communication terminal of the other party through the control channel to change the transmission channel frequency to a transmission channel frequency lower than the current transmission channel frequency, and establish a transmission channel connection with the lower transmission channel frequency ;Repeatedly adjust the frequency of the established transmission channel. The solution can improve the wireless communication capability and efficiency.

Description

A wireless communication method and system

technical field

The present invention relates to a communication technology, in particular to a wireless communication method and system.

Background technique

With the development of social economy and technology, the application of wireless communication technology is more and more extensive. In the intelligentization of many buildings, wireless communication technology is usually used, but frequency bands including the 2.4G frequency band used by 802.11b/g/n and the 5G frequency band used by 802.11a will have a large attenuation when encountering walls, resulting in effective The transmission distance is relatively short. When radio waves encounter obstacles, they will be reflected, transmitted, and diffracted. Transmission losses are more severe in reinforced concrete walls. The process of urbanization has led to an increase in the utilization of underground space, including underground parking lots and underground shopping malls. Wireless coverage in these places is also very important, especially when you want to build underground smart parking lots or other underground smart buildings. However, there are many walls in the underground parking lot, and the signal attenuation is very serious when the wireless signal passes through the thick wall, resulting in a very short transmission distance of the wireless signal.

In view of this, how to find a method to effectively improve the wireless communication capability in places with walls has become an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a wireless communication method and system for solving the problem of poor wireless communication capability in places with walls in the prior art.

In order to achieve the above object and other related objects, the present invention provides a wireless communication method, the wireless communication method includes: setting a control channel frequency and N transmission channel frequencies, N is a natural number greater than 1, and the N transmission channel frequencies The channel frequency is named as the first transmission channel frequency to the Nth transmission channel frequency according to the frequency from low to high; the control channel connection with the wireless communication terminal of the other party is established with the control channel frequency; the Nth transmission channel frequency is established with the The transmission channel connection of the wireless communication terminal of the other party; adjusting the frequency of the established transmission channel: detecting the received signal strength indicator value of the established transmission channel, when the received signal strength indicator value is less than the set value, through the The control channel sends the communication terminal of the other party to change the transmission channel frequency to a transmission channel frequency lower than the current transmission channel frequency, and establishes a transmission channel connection with a lower transmission channel frequency; repeatedly adjusts the established transmission channel frequency until the received signal strength indicator value of the current transmission channel frequency is less than the preset value or the current transmission channel frequency is the first transmission channel frequency.

Optionally, the wireless communication method further includes: when receiving a request from the counterpart communication terminal to change the transmission channel frequency to a transmission channel frequency one level lower than the current transmission channel frequency, adjusting the transmitted transmission channel frequency according to the request .

Optionally, the frequency of the control channel and the frequency of the transmission channel are within the same set frequency range.

Optionally, the N transmission channel frequencies have the same frequency difference between any two adjacent transmission channel frequencies from small to large.

Optionally, the setpoint can be adjusted.

Optionally, the control channel is a two-way control channel established by the terminals of both parties in the wireless communication through the frequency of the control channel.

The present invention also provides a wireless communication system, the wireless communication system includes: a channel frequency setting module, used to set a control channel frequency and N transmission channel frequencies, N is a natural number greater than 1, and the N transmission channel frequencies The channel frequency is named as the first transmission channel frequency to the Nth transmission channel frequency according to the frequency from low to high; the control channel establishment module is connected with the channel frequency setting module, and is used to establish the wireless communication terminal with the other party with the control channel frequency The control channel connection of the transmission channel; the transmission channel establishment module is connected with the channel frequency setting module, and is used to establish the transmission channel connection with the wireless communication terminal of the other party with the Nth transmission channel frequency; the transmission channel adjustment module is connected with the channel frequency setting module The fixed module, the control channel establishment module and the transmission channel establishment module are connected to adjust the frequency of the established transmission channel: detect the received signal strength indication value of the established transmission channel, when the received signal strength indication value is less than the set value , send the communication terminal of the opposite party through the control channel to change the transmission channel frequency to a transmission channel frequency lower than the current transmission channel frequency, and establish a transmission channel connection with the lower transmission channel frequency; repeat the adjustment The frequency of the established transmission channel until the received signal strength indicator value of the current transmission channel frequency is greater than the preset value or the current transmission channel frequency is the first transmission channel frequency.

Optionally, the transmission channel adjustment module is further configured to: when receiving a request from the counterpart communication terminal to change the transmission channel frequency to a transmission channel frequency one level lower than the current transmission channel frequency, adjust the transmitted transmission according to the request channel frequency.

Optionally, the frequency of the control channel and the frequency of the transmission channel are within the same set frequency range.

Optionally, the N transmission channel frequencies have the same frequency difference between any two adjacent transmission channel frequencies from small to large.

Optionally, the setpoint can be adjusted.

Optionally, the control channel is a two-way control channel established by the terminals of both parties in the wireless communication through the frequency of the control channel.

As mentioned above, a wireless communication method and system of the present invention has the following beneficial effects: the channel frequency of the transmission channel can be dynamically adjusted, and the stability of communication can be ensured even in places with many obstacles, and at the same time, it can be as fully as possible. Utilize bandwidth. The invention is especially suitable for spaces with many walls, such as underground parking lots.

Description of drawings

FIG. 1 is a schematic flowchart of an embodiment of the wireless communication method of the present invention.

FIG. 2 is a schematic flow diagram of a control channel establishment process of an embodiment of the wireless communication method of the present invention.

FIG. 3 is a schematic diagram of a transmission channel establishment and adjustment process of an embodiment of the wireless communication method of the present invention.

FIG. 4 is a block diagram of an embodiment of the wireless communication system of the present invention.

Component designation description

1 Wireless communication system

11 channel frequency setting module

12 control channel establishment module

13 Transmission channel establishment module

14 Transmission channel adjustment module

S1～S5 steps

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

The invention provides a wireless communication method. In one embodiment, as shown in FIG. 1, the wireless communication method includes:

Step S1, set a control channel frequency and N transmission channel frequencies, N is a natural number greater than 1, and the N transmission channel frequencies are named as the first transmission channel frequency to the Nth transmission channel frequency according to the frequency from low to high . Specifically, the frequency of the control channel and the frequency of the transmission channel are within the same set frequency range. As a preferred solution, the N transmission channel frequencies have the same frequency difference between any two adjacent transmission channel frequencies in ascending order of frequency. In one embodiment, one control channel frequency C-CH (Control Channel)==1.210 GHz, and three transmission channel frequencies are set. The three transmission channel frequencies from small to large are: the first transmission channel frequency ACH (Absolute Channel, absolute channel) = 1.220GHz; the second transmission channel frequency RCH (Relate Channel, relative channel) = 1.230GHz; the third transmission channel frequency CCH (Common Channel, common channel) = 1.240 GHz. According to the principle of wireless communication, the transmission frequency is directly proportional to the link loss, and the lower the transmission frequency, the smaller the link loss. That is to say, on the same transmission path, the lower the transmission frequency, the smaller the link loss. Therefore, C-CH has the strongest wall penetration ability, followed by ACH, followed by RCH, and CCH has the worst wall penetration ability. And their bandwidth is just the opposite. The bandwidth of CCH is the largest, followed by the bandwidth of RCH, followed by the bandwidth of ACH, and the bandwidth of C-CH is the worst.

Step S2, establishing a control channel connection with the other party's wireless communication terminal by using the control channel frequency. Specifically, the control channel is a two-way control channel established by the terminals of both wireless communication parties through the frequency of the control channel. In one embodiment, as shown in FIG. 2 , the communication parties are point A and point B respectively. Point A uses the control channel frequency C-CH channel to exist through point A, when point A receives the notification from point B, B establishes a connection with A; point B uses the control channel frequency C-CH channel to exist through point B, when point B When receiving the notification from point A, B establishes a connection with A. At this time, A and B establish a two-way C-CH connection, that is, establish a control channel connection with the other party's wireless communication terminal by using the control channel frequency C-CH. In short, point A uses the frequency band defined by C-CH to notify point A, point B uses the frequency band defined by C-CH to notify point B, point A receives the C-CH announcement from point B, and point B receives C from point A -CH notification, the two-way C-CH is established successfully. The point A or point B may be a mobile terminal or a base station.

Step S3, establishing a transmission channel connection with the counterpart wireless communication terminal at the Nth transmission channel frequency. Specifically, a transmission channel connection with the counterpart wireless communication terminal is established with the transmission channel frequency with the highest frequency (ie, the Nth transmission channel frequency) among the set transmission channel frequencies. In one embodiment, after the control channel connection is established successfully, the transmission channel connection with the counterpart wireless communication terminal is established with the maximum frequency among the set transmission channel frequencies, that is, the third transmission channel frequency CCH.

Step S4, adjust the frequency of the established transmission channel: detect the received signal strength indicator value of the established transmission channel, and when the received signal strength indicator value is less than the set value, send the communication terminal of the other party through the control channel The request to change the transmission channel frequency to a transmission channel frequency one level lower than the current transmission channel frequency establishes a transmission channel connection with the transmission channel frequency one level lower. In one embodiment, the set value includes a power threshold indicating a good transmission status. In one embodiment, the set value can be adjusted according to the actual environment.

Step S5, repeatedly adjusting the frequency of the established transmission channel until the received signal strength indicator value of the current transmission channel frequency is less than a preset value or the current transmission channel frequency is the first transmission channel frequency.

In one embodiment, the wireless communication method further includes: when receiving a request from the counterpart communication terminal to change the frequency of the transmission channel to a frequency of the transmission channel that is one level lower than the frequency of the current transmission channel, adjusting the transmitted transmission according to the request channel frequency.

In one embodiment, as shown in FIG. 3 , the establishment and adjustment of the transmission channel includes: checking whether the C-CH is successfully established, that is, whether the control channel connection is successfully established. If the establishment fails, it is required to establish the C-CH control channel first. After the control channel connection is established successfully, the CCH channel is first opened, that is, the transmission channel is established with the maximum frequency among the set transmission channel frequencies. Check whether the RSSI (Received Signal Strength Indication) of the CCH is greater than P (good), that is, the power threshold of a good state, P (good), and the power threshold of a good state is a set value. If the RSSI of the CCH is greater than the set value, the CCH is a transmission channel frequency. If the RSSI of the CCH is smaller than the set value, the transmission channel frequency is modified to a transmission channel frequency one level lower than the current transmission channel frequency, that is, the second transmission channel frequency RCH. Check whether the RSSI of the RCH is greater than P(good), the power threshold of a good state. If the RSSI of the RCH is greater than the threshold, the RCH is the transmission channel frequency. If the RSSI of the RCH is less than the set value, modify the transmission channel frequency to a transmission channel frequency lower than the current transmission channel frequency, that is, the first transmission channel frequency ACH, and check whether the RSSI of the ACH is greater than P (good), good The power threshold of the state. If the RSSI of the ACH is greater than the threshold, the ACH is the transmission channel frequency. If the RSSI of the ACH is greater than the threshold, it indicates that none of the set transmission channel frequencies can achieve the preset transmission effect, and the transmission channel connection needs to be re-established.

The invention also provides a wireless communication system. The wireless communication system can use the above wireless communication method to improve the performance and efficiency of wireless communication. In one embodiment, as shown in FIG. 4 , the wireless communication system 1 includes a channel frequency setting module 11 , a control channel establishment module 12 , a transmission channel establishment module 13 and a transmission channel adjustment module 14 . in:

The channel frequency setting module 11 is used to set a control channel frequency and N transmission channel frequencies, N is a natural number greater than 1, and the N transmission channel frequencies are named as the first transmission channel frequency by frequency from low to high. Nth transmission channel frequency. Specifically, the frequency of the control channel and the frequency of the transmission channel are within the same set frequency range. As a preferred solution, the N transmission channel frequencies have the same frequency difference between any two adjacent transmission channel frequencies in ascending order of frequency. In one embodiment, one control channel frequency C-CH (Control Channel)==1.210 GHz, and three transmission channel frequencies are set. The three transmission channel frequencies from small to large are: the first transmission channel frequency ACH (Absolute Channel, absolute channel) = 1.220GHz; the second transmission channel frequency RCH (Relate Channel, relative channel) = 1.230GHz; the third transmission channel frequency CCH (Common Channel, common channel) = 1.240 GHz. According to the principle of wireless communication, the transmission frequency is directly proportional to the link loss, and the lower the transmission frequency, the smaller the link loss. That is to say, on the same transmission path, the lower the transmission frequency, the smaller the link loss. Therefore, C-CH has the strongest wall penetration ability, followed by ACH, followed by RCH, and CCH has the worst wall penetration ability. And their bandwidth is just the opposite. The bandwidth of CCH is the largest, followed by the bandwidth of RCH, followed by the bandwidth of ACH, and the bandwidth of C-CH is the worst.

The control channel establishing module 12 is connected with the channel frequency setting module 11, and is used for establishing a control channel connection with the opposite wireless communication terminal at the control channel frequency. Specifically, the control channel is a two-way control channel established by the terminals of both wireless communication parties through the frequency of the control channel. In one embodiment, the working process of the control channel establishment module 12 is shown in FIG. 2 , and the communication parties are point A and point B respectively. Point A uses the control channel frequency C-CH channel to exist through point A, when point A receives the notification from point B, B establishes a connection with A; point B uses the control channel frequency C-CH channel to exist through point B, when point B When receiving the notification from point A, B establishes a connection with A. At this time, A and B establish a two-way C-CH connection, that is, establish a control channel connection with the other party's wireless communication terminal by using the control channel frequency C-CH. In short, point A uses the frequency band defined by C-CH to notify point A, point B uses the frequency band defined by C-CH to notify point B, point A receives the C-CH announcement from point B, and point B receives C from point A -CH notification, the two-way C-CH is established successfully. The point A or point B may be a mobile terminal or a base station.

The transmission channel establishing module 13 is connected with the channel frequency setting module 11, and is used for establishing a transmission channel connection with the wireless communication terminal of the counterpart at the Nth transmission channel frequency. Specifically, a transmission channel connection with the counterpart wireless communication terminal is established with the transmission channel frequency with the highest frequency (ie, the Nth transmission channel frequency) among the set transmission channel frequencies. In one embodiment, after the control channel connection is established successfully, the transmission channel connection with the counterpart wireless communication terminal is established with the maximum frequency among the set transmission channel frequencies, that is, the third transmission channel frequency CCH.

The transmission channel adjustment module 14 is connected with the channel frequency setting module 11, the control channel establishment module 12 and the transmission channel establishment module 13, and is used to adjust the frequency of the established transmission channel: detect the received signal strength indicator value of the established transmission channel, When the received signal strength indicator value is less than the set value, send the communication terminal of the opposite party through the control channel to change the frequency of the transmission channel to a transmission channel frequency lower than the frequency of the current transmission channel. Establish a transmission channel connection with the frequency of the transmission channel; repeatedly adjust the frequency of the established transmission channel until the received signal strength indicator value of the current transmission channel frequency is greater than the preset value or the current transmission channel frequency is the first transmission channel frequency. In one embodiment, the set value includes a power threshold indicating a good transmission status. In one embodiment, the set value can be adjusted according to the actual environment. In one embodiment, the transmission channel adjustment module 14 is further configured to: when receiving a request from the communication terminal of the other party to change the frequency of the transmission channel to a transmission channel frequency one level lower than the frequency of the current transmission channel, adjust according to the request Transmission channel frequency to send.

In one embodiment, as shown in FIG. 3 , the working process of the transmission channel establishment module 13 and the transmission channel adjustment module 14 includes: checking whether the C-CH is successfully established, that is, whether the control channel connection is successfully established. If the establishment fails, it is required to establish the C-CH control channel first. After the control channel connection is established successfully, the CCH channel is first opened, that is, the transmission channel is established with the maximum frequency among the set transmission channel frequencies. Check whether the RSSI (Received Signal Strength Indication, Received Signal Strength Indication) of the CCH is greater than P (good), that is, the power threshold of a good state, P (good), and the power threshold of a good state is a set value. If the RSSI of the CCH is greater than the set value, the CCH is a transmission channel frequency. If the RSSI of the CCH is smaller than the set value, the transmission channel frequency is modified to a transmission channel frequency one level lower than the current transmission channel frequency, that is, the second transmission channel frequency RCH. Check whether the RSSI of the RCH is greater than P(good), the power threshold of a good state. If the RSSI of the RCH is greater than the threshold, the RCH is the transmission channel frequency. If the RSSI of the RCH is less than the set value, modify the transmission channel frequency to a transmission channel frequency lower than the current transmission channel frequency, that is, the first transmission channel frequency ACH, and check whether the RSSI of the ACH is greater than P (good), good The power threshold of the state. If the RSSI of the ACH is greater than the threshold, the ACH is the transmission channel frequency. If the RSSI of the ACH is greater than the threshold, it indicates that none of the set transmission channel frequencies can achieve the preset transmission effect, and the transmission channel connection needs to be re-established.

To sum up, the wireless communication method and system of the present invention can dynamically adjust the channel frequency of the transmission channel, ensure communication stability even in places with many obstacles, and make full use of the bandwidth as much as possible. The technical scheme of the present invention is especially suitable for spaces with many walls, such as underground parking lots. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (8)

1. a kind of wireless communications method, which is characterized in that the wireless communications method includes：

One control channel frequency of setting and N number of transmission channel frequency, N are the natural number more than 1, N number of transmission channel frequency Rate is classified from low to high by frequency is named as the first transmission channel frequency to N transmission channel frequencies；

It is connect with the control channel of other side's wireless communication terminal with control channel frequency foundation；

It is connect with the transmission channel of other side's wireless communication terminal with N transmission channel frequencies foundation；

Adjust the frequency of established transmission channel：The received signal strength indicator value for detecting established transmission channel, works as institute When stating received signal strength indicator value less than setting value, the counterparting communications terminal is sent by the control channel and believes transmission Road frequency shift at the transmission channel frequency of level-one lower than current transmission channel frequency request, with the transmission channel of low level-one frequency Rate establishes transmission channel connection；

The frequency for repeating the established transmission channel of adjustment, until the received signal strength indicator value of current transmission channel frequency is small In preset value or current transmission channel frequency be the first transmission channel frequency；

The control channel frequency is with the transmission channel frequency in the frequency range of the same setting.

2. wireless communications method according to claim 1, it is characterised in that：The wireless communications method further includes：It receives Transmission channel frequency shift is asked at the transmission channel frequency of level-one lower than current transmission channel frequency to counterparting communications terminal When asking, by the transmission channel frequency of the request adjustment transmission.

3. wireless communications method according to claim 1, it is characterised in that：N number of transmission channel frequency by frequency from The small difference on the frequency to any two big adjacent transmission channel frequencies is identical.

4. wireless communications method according to claim 1, it is characterised in that：The setting value can be adjusted.

5. a kind of wireless communication system, it is characterised in that：The wireless communication system includes：

Channel frequency setting module, for setting a control channel frequency and N number of transmission channel frequency, N is the nature more than 1 Number, N number of transmission channel frequency is classified from low to high by frequency is named as the first transmission channel frequency to N transmission channel frequencies Rate；

Control channel establishes module, is connected with channel frequency setting module, for control channel frequency foundation and other side The control channel of wireless communication terminal connects；

Transmission channel establishes module, is connected with channel frequency setting module, for N transmission channel frequencies foundation and institute State the transmission channel connection of other side's wireless communication terminal；

Transmission channel adjusts module, establishes module with channel frequency setting module, control channel and transmission channel establishes module It is connected, the frequency for adjusting established transmission channel：The received signal strength indicator value of established transmission channel is detected, When the received signal strength indicator value is less than setting value, sending the counterparting communications terminal by the control channel will pass Defeated channel frequency is changed to the request of the transmission channel frequency of level-one lower than current transmission channel frequency, is believed with the transmission of low level-one Road frequency establishes transmission channel connection；The frequency for repeating the established transmission channel of adjustment, until current transmission channel frequency Received signal strength indicator value is more than preset value or current transmission channel frequency is the first transmission channel frequency；

The control channel frequency is with the transmission channel frequency in the frequency range of the same setting.

6. wireless communication system according to claim 5, it is characterised in that：The transmission channel adjustment module is additionally operable to： Counterparting communications terminal is received by the transmission channel frequency by transmission channel frequency shift at level-one lower than current transmission channel frequency When the request of rate, by the transmission channel frequency of the request adjustment transmission.

7. wireless communication system according to claim 5, it is characterised in that：N number of transmission channel frequency by frequency from The small difference on the frequency to any two big adjacent transmission channel frequencies is identical.

8. wireless communication system according to claim 5, it is characterised in that：The setting value can be adjusted.