CN101815307B - Main engine operation control method and device in indoor distribution system - Google Patents

Abstract

The invention discloses a host operation control method in an indoor distribution system, which comprises the following steps: comparing the outdoor signal strength received by a receiving antenna in an indoor distribution system with a threshold value; when the outdoor signal strength is lower than a threshold value, controlling the host to be started; and when the outdoor signal strength is not lower than the threshold value, controlling the host to close. The invention also discloses a host operation control device in the indoor distribution system. By adopting the invention, the interference of the indoor host to the outdoor base station can be avoided under the condition of meeting the indoor signal coverage requirement.

Description

Main engine operation control method and device in indoor distribution system

technical field

The invention relates to the field of communication technology, in particular to a method and device for controlling the operation of a host computer in an indoor distribution system.

Background technique

With the development of the communication industry, people's requirements for communication are also getting higher and higher, and passenger ships are no exception. Especially, the navigation accidents that have occurred in recent years have made people pay more and more attention to the communication coverage of passenger ships. However, there is a big problem with the coverage in the cabin of the ship. The serious shielding of the hull steel plate makes the signal in the cabin severely attenuated. The interior of the ship's hull will become a complete blind spot.

For the weak coverage caused by serious shielding, the indoor distribution system is currently used to solve it. The indoor distribution system is a successful solution for improving the mobile communication environment in buildings for indoor user groups. The principle is to use the indoor antenna distribution system to evenly distribute the signal of the mobile base station in every corner of the room, so as to ensure ideal signal coverage and signal quality in the indoor area.

Figure 1 is a schematic diagram of the indoor distribution system. As shown in the figure, the indoor distribution system includes the following parts: receiving antenna, host, dry amplifier, power divider, indoor antenna and feeder. The receiving antenna is responsible for receiving the signal of the outdoor base station, and then feeds it into the host for processing and amplification, and then uses the dry amplifier, power divider and indoor antenna to evenly distribute the signal inside the building; in turn, the mobile phone signal passes through the indoor antenna, feeder, etc. Enter the host computer, after being amplified, it is sent back to the base station through the receiving antenna.

The existing indoor distribution system is mainly aimed at buildings on land. If it is copied to a ship for cabin coverage, there will be the following problems: Since the signal at sea is very weak compared with urban areas, in order to ensure the coverage effect in the cabin, high Gain host to amplify the signal. For ordinary gain hosts, due to the small power, it will not introduce obvious interference to the existing network. The power of the high-gain host is obviously higher. Due to the link loss in the open sea, the uplink signal is already weak when it reaches the receiving antenna of the base station, and the interference is not obvious; but after entering the offshore, the uplink signal is too strong and will be received by the existing base station. The signal causes obvious interference, which significantly increases the noise floor of the base station, reduces the receiving sensitivity of the base station, and causes the shrinkage of the base station coverage area.

Contents of the invention

An embodiment of the present invention provides a method for controlling the operation of a host in an indoor distribution system, which is used to prevent the indoor host from interfering with an outdoor base station while meeting indoor signal coverage requirements. The method includes:

Comparing the outdoor signal strength received by the receiving antenna in the indoor distribution system with the threshold value;

When the outdoor signal strength is lower than the threshold value, the control host is turned on;

When the outdoor signal strength is not lower than the threshold value, the control host is turned off.

Preferably, before comparing the outdoor signal strength received by the receiving antenna in the indoor distribution system with the threshold value, it also includes:

Record the outdoor signal strength received by the receiving antenna in the indoor distribution system; when recording, sample according to the set time granularity;

The comparison of the outdoor signal strength received by the receiving antenna in the indoor distribution system with the threshold value includes:

Calculate the average or median value of multiple outdoor signal strengths recorded within a set period of time;

Compare the calculated result with the threshold value.

Preferably, when the outdoor signal strength is lower than the threshold value, the control host is turned on, including:

When the outdoor signal strength is lower than the threshold value, control the host to turn on by outputting a switch;

When the outdoor signal strength is not lower than the threshold value, the control host is shut down, including:

When the outdoor signal strength is not lower than the threshold value, a switching value is output to control the host to shut down.

Preferably, when the outdoor signal strength is lower than the threshold value, the control host is turned on, which means:

When the comparison result of the set times is that the outdoor signal strength is lower than the threshold value, the control host is turned on;

When the outdoor signal strength is not lower than the threshold value, the control host is turned off, which means:

When the comparison result of the set number of times is that the outdoor signal strength is not lower than the threshold value, the control host is turned off.

Preferably, the threshold value is calculated according to one or any combination of the following factors:

Link budget, feeder loss, host uplink and downlink gain, receiving antenna gain, hull loss, free space loss, linear amplification range.

Preferably, the host is a high-gain host.

The embodiment of the present invention also provides a host operation control device in an indoor distribution system, which is used to prevent the indoor host from interfering with the outdoor base station while meeting the indoor signal coverage requirements. The device includes:

The comparison module is used to compare the outdoor signal strength received by the receiving antenna in the indoor distribution system with a threshold value;

The control module is configured to turn on the control host when the outdoor signal strength is lower than the threshold value, and turn off the control host when the outdoor signal strength is not lower than the threshold value.

Preferably, the device also includes:

The recording module is used to record the outdoor signal strength received by the receiving antenna in the indoor distribution system; when recording, sampling is performed according to the set time granularity;

The comparison module includes:

A calculation unit, used to calculate the average or median value of multiple outdoor signal strengths recorded within a set period of time;

The comparison unit is used for comparing the calculation result with the threshold value.

Preferably, the control module is further configured to control the host to start by outputting a switch when the outdoor signal strength is lower than the threshold value; when the outdoor signal strength is not lower than the threshold value, output a The switching value control host is closed.

Preferably, the control module is further used to turn on the control host when the comparison results of the set times are all the outdoor signal strength is lower than the threshold value; when the comparison results of the set times are all the outdoor signal strength When it is not lower than the threshold value, the control host is shut down.

Preferably, the device also includes:

A calculation module, configured to calculate the threshold value according to one or any combination of the following factors:

Link budget, feeder loss, host uplink and downlink gain, receiving antenna gain, hull loss, free space loss, linear amplification range.

Preferably, the host is a high-gain host.

In the embodiment of the present invention, the outdoor signal strength received by the receiving antenna in the indoor distribution system is compared with the threshold value; when the outdoor signal strength is lower than the threshold value, the control host is turned on; when the outdoor signal strength is not low When the threshold value is exceeded, the control host is turned off, which not only meets the indoor signal coverage requirements, but also prevents the indoor host from interfering with the outdoor base station. Insufficient balance between meeting the coverage requirement and avoiding interference to the base station, and achieving the purpose of not causing interference to the shore base station when using a high-gain main engine for indoor coverage of the ship, and the investment is low and the effect is obvious. At the same time, the embodiment of the present invention can also be extended and applied to other similar scenarios.

Description of drawings

Fig. 1 is the schematic diagram of the indoor distribution system in the background technology;

2 is a flowchart of a method for controlling the operation of a host computer in an indoor distribution system according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a host operation control device in an indoor distribution system according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 2, in the embodiment of the present invention, the flow of the method for controlling the operation of the host computer in the indoor distribution system may include:

Step 201, comparing the outdoor signal strength received by the receiving antenna in the indoor distribution system with a threshold value;

Step 202: When the comparison result is that the outdoor signal strength is lower than the threshold value, the control host is turned on; when the comparison result is that the outdoor signal strength is not lower than the threshold value, the control host is turned off.

The main engine operation control method in the indoor distribution system of the embodiment of the present invention can be applied to the situation where a high-gain main engine is used for indoor coverage of a ship, and it can also be applied to a general main engine for indoor coverage of a fixed building, or a general main engine/high-gain main engine for indoor coverage. Cars, aircraft interior coverage and similar scenes.

In order to ensure the accuracy of the comparison result in step 201, in one embodiment, the outdoor signal strength received by the receiving antenna in the indoor distribution system can be recorded in advance; when recording, sampling is performed according to the set time granularity, for example, a receiving level value is recorded every 3s . When performing comparison, an average value or a median value may be calculated for multiple outdoor signal strengths recorded within a set period of time, and the calculation result may be compared with a threshold value.

In step 202, there are many ways to control the on/off of the host, for example, after obtaining the comparison result, send a command to the host to instruct the host to turn on/off; or, connect a switch circuit in series, and control the outdoor signal transmission by controlling the switch circuit On/off of the link to the host; or, control the on/off of the host by outputting a switch.

In order to ensure the accuracy and reliability of implementing host control timing, in one embodiment, when the comparison results of the set times (such as 5 times) are all that the outdoor signal strength is lower than the threshold value, the control host is turned on; The comparison result of times is that when the outdoor signal strength is not lower than the threshold value, the control host is turned off.

Taking the case of using a high-gain host for indoor coverage of a ship as an example, the method for controlling the operation of the host in the indoor distribution system of this embodiment will be described in detail.

In this example, considering that the hosts of the existing indoor distribution system are fixed-range gain and cannot be automatically turned on/off, while the hosts of the ship’s indoor distribution system are all high-gain hosts, in order to avoid interference with urban base stations when offshore, the The host implements the control so that it can be turned on/off depending on the strength of the outdoor signal. The specific working process is as follows:

Calculate a reasonable threshold value based on one or any combination of factors such as link budget, feeder loss, host uplink and downlink gain, receiving antenna gain, hull loss, free space loss, and linear amplification range;

After the ship sails offshore, record the outdoor signal strength received by the receiving antenna, and compare it with the threshold value. When the outdoor signal strength is lower than the threshold value for several consecutive comparisons (for example, 5 times), it is considered that the outdoor signal strength in the cabin is lower than the threshold value. The signal is weak, and the output switching value controls the host to turn on;

When the ship approaches the shore, record the outdoor signal strength received by the receiving antenna and compare it with the threshold value. When the result of several consecutive comparisons is that the outdoor signal strength is not lower than the threshold value, the ship is considered to be close to the shore. , the signal strength in the cabin is strong enough, and the main engine does not need to work again. At this time, the output switching value controls the main engine to turn off.

In this way, it can not only solve the problem of weak signal of the source base station in the far sea when using the high-gain host for indoor coverage of the ship, but also do not interfere with the base station on the shore after entering the offshore without affecting the coverage in the cabin.

Based on the same inventive concept, an embodiment of the present invention also provides a host operation control device in an indoor distribution system, the structure of which is shown in Figure 3, which may include:

A comparison module 301, configured to compare the outdoor signal strength received by the receiving antenna in the indoor distribution system with a threshold value;

The control module 302 is configured to turn on the control host when the outdoor signal strength is lower than the threshold value, and turn off the control host when the outdoor signal strength is not lower than the threshold value.

In one embodiment, the device shown in Figure 3 may also include:

The recording module 303 is used for recording the outdoor signal strength received by the receiving antenna in the indoor distribution system; sampling is performed according to the set time granularity during recording;

Then the comparison module 301 can also include:

Calculation unit 3011, configured to calculate the average or median value of multiple outdoor signal strengths recorded within a set period of time;

A comparing unit 3012, configured to compare the calculation result with a threshold value.

In one embodiment, the control module 302 can also be used to control the host to turn on by outputting a switch when the outdoor signal strength is lower than the threshold value; when the outdoor signal strength is not lower than the threshold value, output A digital control host is closed.

In one embodiment, the control module 302 can also be used to turn on the control host when the comparison results of the set times are all the outdoor signal strength is lower than the threshold value; When the intensity is not lower than the threshold value, the control host is turned off.

In one embodiment, the device shown in Figure 3 may also include:

Calculation module 304, configured to calculate the threshold value according to one or any combination of the following factors:

Link budget, feeder loss, host uplink and downlink gain, receiving antenna gain, hull loss, free space loss, linear amplification range.

In one embodiment, the above-mentioned host is a high-gain host.

During specific implementation, the above-mentioned recording module 303 can include an industrial mobile phone module, which is connected with the receiving antenna in the indoor distribution system, such as the donor antenna of the ship's indoor distribution system, and has an information processing unit, which can record the signal it receives. The recording method It may be that the reception level is sampled at a certain time granularity. For example, a level value is recorded every 3S, and the record is sent to the comparison module 301 through the serial line.

The calculation module 304 can be equipped with accessories such as keyboard input and LCD display, and can manually set a signal strength threshold, and transmit the set value to the comparison module 301 through a serial line. For example, if it is set to -50dBm, under normal circumstances, the signal outside the cabin can still meet the call requirements after being shielded by the hull and entering the cabin when the receiving level is not lower than this level.

The comparison module 301 can be a digital circuit module, which can compare the values recorded by the recording module 303 and the calculation module 304 with the set values. Then compare the calculation result with the threshold value calculated by the calculation module 304, and then output a switch value to control whether the host needs to change to the on/off state.

In the embodiment of the present invention, the outdoor signal strength received by the receiving antenna in the indoor distribution system is compared with the threshold value; when the outdoor signal strength is lower than the threshold value, the control host is turned on; when the outdoor signal strength is not low When the threshold value is exceeded, the control host is turned off, which not only meets the indoor signal coverage requirements, but also prevents the indoor host from interfering with the outdoor base station. Insufficient balance between meeting the coverage requirement and avoiding interference to the base station, and achieving the purpose of not causing interference to the shore base station when using a high-gain main engine for indoor coverage of the ship, and the investment is low and the effect is obvious. At the same time, the embodiment of the present invention can also be extended and applied to other similar scenarios.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. A host computer operation control method in an indoor distribution system, characterized in that the method comprises: Record the outdoor signal strength received by the receiving antenna in the indoor distribution system; when recording, sample according to the set time granularity; Calculate the average or median value of multiple outdoor signal strengths recorded within a set period of time; Comparing the calculation result with a threshold value; When the calculation result is lower than the threshold value, the control host is turned on; When the calculation result is not lower than the threshold value, the control host is shut down. 2. The method according to claim 1, wherein when the calculation result is lower than a threshold value, the control host is turned on, comprising: When the calculation result is lower than the threshold value, control the host to turn on by outputting a switch; When the calculation result is not lower than the threshold value, the control host is shut down, including: When the calculation result is not lower than the threshold value, a switching value is output to control the host to shut down. 3. The method according to claim 1, wherein when the calculation result is lower than the threshold value, the control host is turned on, which means: When the comparison result of the set number of times is that the calculation result is lower than the threshold value, the control host is turned on; When the calculation result is not lower than the threshold value, the control host is shut down, which means: When the comparison results of the set times are all the calculation results are not lower than the threshold value, the control host is turned off. 4. The method according to claim 1, wherein when the main engine performs indoor coverage of the ship, the threshold value is calculated according to one or any combination of the following factors: Link budget, feeder loss, host uplink and downlink gain, receiving antenna gain, hull loss, free space loss, linear amplification range. 5. The method according to any one of claims 1 to 4, wherein the host is a high-gain host. 6. A main engine operation control device in an indoor distribution system, characterized in that it includes a recording module, a comparison module and a control module, wherein: The recording module is used to record the outdoor signal strength received by the receiving antenna in the indoor distribution system; when recording, sampling is performed according to the set time granularity; The comparison module includes a calculation unit and a comparison unit, where: A calculation unit, used to calculate the average or median value of multiple outdoor signal strengths recorded within a set period of time; A comparison unit, used to compare the calculation result with a threshold value; The control module is configured to turn on the control host when the calculation result is lower than the threshold value, and turn off the control host when the calculation result is not lower than the threshold value. 7. The device according to claim 6, wherein the control module is further configured to output a switching value to control the host to turn on when the calculation result is lower than the threshold value; When it is at the threshold value, the host is shut down by outputting a switch value. 8. The device according to claim 6, wherein the control module is further configured to control the host to turn on when the comparison result of the set times is lower than the threshold value; When the comparison results of all the calculation results are not lower than the threshold value, the control host is shut down. 9. The device according to claim 6, wherein when the main engine performs indoor coverage of the ship, it further comprises: A calculation module, configured to calculate the threshold value according to one or any combination of the following factors: Link budget, feeder loss, host uplink and downlink gain, receiving antenna gain, hull loss, free space loss, linear amplification range. 10. The device according to any one of claims 6 to 9, wherein the host is a high-gain host.

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