A capacity expansion method based on DECT mobile phone system

Abstract

The invention discloses a capacity expansion method based on a DECT mobile phone system, which specifically comprises the following steps: improving an existing base station and an existing DECT mobile phone to form an improved base station and an improved DECT mobile phone; arranging a plurality of improved base stations at an application site to establish an improved base station group, wherein the improved base stations are connected via a router; the improved DECT mobile phones communicate with each other via the improved base station group; when the improved DECT mobile phone is in the middle of two base stations, it actively connects to the improved base station with a strong signal and disconnects the improved base station with a weak signal to realize data roaming; the invention enables more DECT mobile phones to be connected, and the number of DECT mobile phones is not limited, so that the DECT mobile phones can be applied in more places.

Description

Technical Field

[0001] The present invention relates to the technical field related to DECT mobile phone systems, and in particular to a capacity expansion method based on a DECT mobile phone system. Background Art

[0002] The traditional 400-900MHZ intercoms on the market now can only connect 5 sub-machines to one host, and can only make one-way calls. This brings great inconvenience to practical applications. Due to the module size and power consumption issues, the size and weight of traditional intercoms are very large. There are also similar WIFI-modified DECT mobile phones on the market. They support voice and video communications. However, the WIFI transmission frequency is 2.4GHZ and 5.8GHZ. The transmission distance is limited. It can only be transmitted within a range of about 30 meters, and the wall penetration is poor. The frequency used by DECT is 1.7-1.9GHZ. Different countries use different frequencies. Europe, South Africa, most of Asia, Australia, New Zealand (10 channels) 1880-1900MHZ, South Korea (3 channels) 1786-1792MHZ, Japan (J-DECT) 1893-1906MHZ, Brazil (10 channels) 1910-1920MHZ, most of Latin America excluding Brazil 1920-1930MHZ. DECT is up to 200 meters indoors, and uses a 6-kilometer directional antenna outdoors. If GSM mobile phones are used instead of DECT networking, each mobile phone needs to be inserted with a SIM card, and SIM purchases require real-name registration. The staff turnover of shopping malls is also large. It is also inconvenient. And the manufactured mobile phones need to register a wireless production license. It is also inconvenient to produce. Due to technical limitations, early DECT could only be used for home mother-and-child phones, and cordless calls upstairs and upstairs. The number of sub-machines connected to a seat is limited to a maximum of 10. Summary of the invention

[0003] In order to solve the defects in the prior art, the present invention provides a capacity expansion method based on a DECT mobile phone system.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The present invention provides a capacity expansion method based on a DECT mobile phone system, comprising the following steps:

[0006] Step 1: Improve the existing base station and the existing DECT mobile phone to form an improved base station and an improved DECT mobile phone; one improved base station can simultaneously support 10n improved DECT mobile phones, where n≥3;

[0007] Step 2: Arrange multiple improved base stations at the application site to establish an improved base station group, and the improved base stations are connected through routers;

[0008] Step 3: The improved DECT mobile phones communicate with each other through the improved base station group; the main body is that the improved DECT mobile phone needs to pair with the improved base station, obtain the unique MAC address assigned by the improved base station, allocate a dedicated channel, and the improved base station records and saves the MAC address.

[0009] Step 4: When the improved DECT mobile phone is in the middle of two base stations, it actively connects to the improved base station with a strong signal and disconnects the improved base station with a weak signal to achieve data roaming; the DECT mobile phones under the improved base station group dial short numbers to make voice calls.

[0010] As a preferred technical solution of the present invention, the improved base station in step 1 includes a main control CPU, a first DECT module, a second DECT module, a third DECT module, a frequency divider and a quartz crystal oscillator VCTCXO;

[0011] The first DECT module, the second DECT module, and the third DECT module are connected to the main control CPU; the OUT1 pin of the frequency divider is connected to the first DECT module, and the OUT2 pin of the frequency divider is connected to the second DECT module and the third DECT module; the quartz crystal oscillator is connected to the IN1 pin and the IN2 pin of the frequency divider via a capacitor;

[0012] The main control CPU is connected to the router.

[0013] As a preferred technical solution of the present invention, each of the first DECT module, the second DECT module and the third DECT module is provided with a radio frequency antenna, which is responsible for registering the m registered DECT mobile phones.

[0014] As a preferred technical solution of the present invention, the quartz crystal oscillator is a 13.824MHZ quartz crystal oscillator VCTCXO.

[0015] As a preferred technical solution of the present invention, the first DECT module, the second DECT module and the third DECT module share a quartz crystal oscillator VCTCXO.

[0016] As a preferred technical solution of the present invention, the improved DECT mobile phone in step 1 includes a central control CPU, a DECTA module and a DECTB module, wherein the DECTA module and the DECTB module are connected to the central control CPU and are also connected to an antenna;

[0017] The DECTA module is used for voice and video data processing and authentication of 10 DECT mobile phones;

[0018] The DECTB module DECT mobile phone roaming; specifically, when the improved DECT mobile phone is in the middle of two base stations, it actively connects to the improved base station with a strong signal and disconnects the improved base station with a weak signal to achieve data roaming.

[0019] As a preferred technical solution of the present invention, the improved DECT mobile phone can directly dial an external network mobile phone through the improved base station group to perform voice communication with the external network mobile phone.

[0020] As a preferred technical solution of the present invention, the number of the improved base stations in the improved base station group is determined according to the area of ​​the site and the number of people using DECT mobile phones.

[0021] The beneficial effects of the present invention are:

[0022] 1. This expansion method based on the DECT mobile phone system improves the existing base station and the existing DECT mobile phone to form an improved base station and an improved DECT mobile phone; one improved base station can simultaneously connect 10n improved DECT mobile phones, where n≥3; step 2: multiple improved base stations are arranged at the application site to establish an improved base station group, and the improved base stations are connected through a router; step 3: the improved DECT mobile phones communicate with each other through the improved base station group; the main body is that the improved DECT mobile phone needs to be paired with the improved base station, obtain the unique MAC address assigned by the improved base station, assign a dedicated channel, and the improved base station records and saves this MAC address. Step 4: When the improved DECT mobile phone is in the middle of the two base stations, it actively connects to the improved base station with a strong signal and disconnects the improved base station with a weak signal to achieve data roaming; the DECT mobile phones under the improved base station group dial short numbers to make voice calls. The base stations are connected to routers between the base stations, and the improved DECT mobile phone can roam. When the improved DECT mobile phone is close to that base station, the signal of the improved DECT mobile phone will be stronger. Improved DECT mobile phones will automatically connect to base stations with strong signals to realize data roaming. DECT modules are added, so that each base station can connect to 10n DECT mobile phones at the same time. In a large shopping mall or company, there are multiple base stations within a certain distance, and the number of DECT mobile phones in this scene is not limited, allowing DECT mobile phones to be used in more places.

[0023] 2. This expansion method based on DECT mobile phone system adopts TI LMV112 frequency divider, and three modules share a 13.824MHZ quartz crystal oscillator VCTCXO. Simultaneous output provides a stable basic clock to three DECT modules. The timing of these three DECT modules is synchronized, which solves the problem that there are differences in the power-on timing of multiple DECT modules in the traditional way, and the crystal oscillator itself also has errors, making it difficult to achieve true synchronization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a method flow diagram of a capacity expansion method based on a DECT mobile phone system of the present invention;

[0026] Figure 2 It is a system block diagram of an improved base station based on a capacity expansion method of a DECT mobile phone system of the present invention;

[0027] Figure 3 It is a system block diagram of an improved DECT mobile phone based on a capacity expansion method of a DECT mobile phone system of the present invention;

[0028] Figure 4 The present invention is a structural schematic diagram of an improved base station group based on a capacity expansion method of a DECT mobile phone system.

[0029] In the figure: 1. Main control CPU; 2. First DECT module; 3. Second DECT module; 4. Third DECT module; 5. Frequency divider; 6. Quartz crystal oscillator; 7. Central control CPU; 8. DECTA module; 9. DECTB module. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides a capacity expansion method based on a DECT mobile phone system, comprising the following steps:

[0032] Step 1: Improve the existing base station and the existing DECT mobile phone to form an improved base station and an improved DECT mobile phone; one improved base station can simultaneously support 10n improved DECT mobile phones, where n≥3;

[0033] Step 2: Arrange multiple improved base stations at the application site to establish an improved base station group, and the improved base stations are connected through routers;

[0034] Step 3: The improved DECT mobile phones communicate with each other through the improved base station group; the main body is that the improved DECT mobile phone needs to pair with the improved base station, obtain the unique MAC address assigned by the improved base station, allocate a dedicated channel, and the improved base station records and saves the MAC address.

[0035] Step 4: When the improved DECT mobile phone is in the middle of two base stations, it actively connects to the improved base station with a strong signal and disconnects the improved base station with a weak signal to achieve data roaming; the DECT mobile phones under the improved base station group dial short numbers to make voice calls. The improved DECT mobile phone can roam. The signal of the improved DECT mobile phone will be stronger when the improved DECT mobile phone is close to the base station. The DECT improved DECT mobile phone will automatically connect to the base station with a strong signal to achieve the data roaming function. The DECT module is added, so that each base station can connect to 10n DECT mobile phones at the same time. In a large shopping mall or company, there are multiple base stations within a certain distance, and the number of DECT mobile phones in this scene is not limited. Let DECT mobile phones have more application places.

[0036] The improved base station in step 1 includes a main control CPU 1, a first DECT module 2, a second DECT module 3, a third DECT module 4, a frequency divider 5 and a quartz crystal oscillator VCTCXO 6;

[0037] The first DECT module 2, the second DECT module 3, and the third DECT module 4 are connected to the main control CPU 1; the OUT1 pin of the divider 5 is connected to the first DECT module, and the OUT2 pin of the divider 5 is connected to the second DECT module 4 and the third DECT module 4; the quartz crystal oscillator 6 is connected to the IN1 and IN2 pins of the divider 5 via a capacitor; the main control CPU 1 is connected to a router.

[0038] The common base stations on the market now all consist of a main control and an external DECT module. Therefore, the DECT module of the main base station can only wirelessly connect to 10 external DECT mobile phones. Our newly designed DECT base station and DECT mobile phones are specially managed and applied. Each DECT mobile phone needs to be paired with the base station. Obtain the unique MAC address assigned by the base station and assign a dedicated channel. The main control base station records and saves this MAC address. The user can also enter the unique phone number of this DECT mobile phone on the handheld terminal. The DECT base station has made many changes on the original basis. The previous DECT base station only had a DECT module, so it could only connect to 10 DECT mobile phones at the same time. Now in order to expand capacity, more DECT mobile phones are connected. The DECT base station has placed 3 DECT modules, each DECT module is connected to 10 DECT mobile phones, and 3 modules can connect to 30 DECT mobile phones at the same time. The problem is that each DECT module has an independent 13.824MHZ quartz crystal oscillator. Even if the three modules are powered on at the same time, there are differences in the power-on timing, and the crystal oscillator itself has errors, so it is difficult to really power on the same time. To solve this problem, we use TI LMV112 frequency divider, and three modules share a 13.824MHZ quartz crystal VCTCXO. Output at the same time, providing a stable basic clock to the three DECT modules. The timing of these three DECT modules is synchronized. The main control CPU processes and distributes IP channels at the same time. Each DECT module has a RF antenna, which is responsible for registering the 10 registered DECT mobile phones.

[0039] One base station can control 30 DECT phones for voice and video communication management at the same time. However, in a large shopping mall or a large company, these 30 DECT phones are far from enough. Due to the large scale of the company, the staff must be equipped with more DECT phones. Therefore, we have established a DECT base station group, which is connected to the IP data network cable or optical fiber through a router. Communication with the external network is also through these routers.

[0040] The first DECT module 2, the second DECT module 3, and the third DECT module 4 are each provided with a radio frequency antenna, which is responsible for registering the m registered DECT mobile phones.

[0041] Wherein, the quartz crystal oscillator 6 is a 13.824MHZ quartz crystal oscillator VCTCXO.

[0042] Among them, the first DECT module 2, the second DECT module 3, and the third DECT module 4 share a quartz crystal oscillator VCTCXO. The DECT base station is equipped with 3 DECT modules, and each DECT module is connected to 10 DECT mobile phones. With 3 modules, 30 DECT mobile phones can be connected at the same time. The problem is that each DECT module previously had an independent 13.824MHZ quartz crystal oscillator. Even if the three modules are powered on at the same time, there are differences in the power-on timing, and there are errors in the crystal oscillator itself. It is difficult to really power them on at the same time. In order to solve this problem, we use the TI LMV112 divider, and the three modules share a 13.824MHZ quartz crystal oscillator VCTCXO. Output at the same time to provide a stable basic clock to the three DECT modules, and the timing of these three DECT modules is synchronized.

[0043] DECT base stations are deployed at intervals of 150 meters. The number of base stations depends on the size of the site and the number of people using DECT phones. In order to achieve data roaming between signal base stations, DECT phones are also specially designed. A DECT phone has two DECT modules.

[0044] Among them, the improved DECT mobile phone in step 1 includes a central control CPU 7, a DECTA module 8 and a DECTB module 9, wherein the DECTA module 8 and the DECTB module 9 are connected to the central control CPU 7 and are connected to the antenna at the same time; the DECTA module 8 is used for voice, video data processing and authentication of 10 DECT mobile phones; the DECTB module 9 is used for roaming of the DECT mobile phone; specifically, when the improved DECT mobile phone is in the middle of two base stations, it actively connects to the improved base station with a strong signal and disconnects the improved base station with a weak signal to achieve data roaming. This proprietary DECT mobile phone has two DECT modules. One DECT module is responsible for voice, video data processing and authentication of 10 DECT mobile phones. The other DECT module is responsible for the roaming of the DECT mobile phone. As can be seen from the above base station group, the DECT mobile phone may be in the middle of two base stations. The closer to that base station, the stronger the signal received from the base station. In order to ensure the quality of communication, this DECT mobile phone can disconnect the base station with a weak signal and actively connect to the base station with a strong signal to achieve the data roaming function. The DECT mobile phones under the DECT base station group in this place can make short calls to each other for voice calls. The DECT base station is connected to the router, the router is connected to the external network cable or optical fiber, and the DECT base station registers a SIP account. The DECT mobile phone can directly call the external network mobile phone through the base station and make voice communications with the external network mobile phone.

[0045] The number of the improved base stations in the improved base station group is determined according to the area of ​​the site and the number of people using DECT mobile phones.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A capacity expansion method based on a DECT mobile phone system, characterized in that: The following steps are involved: Step 1: Improve the existing base station and the existing DECT mobile phone to form an improved base station and an improved DECT mobile phone; One improved base station can simultaneously connect 10n improved DECT mobile phones, including ; Step 2: Arrange multiple improved base stations at the application site to establish an improved base station group, and the improved base stations are connected through routers; Step 3: The improved DECT mobile phones communicate with each other through the improved base station group; The main body is that the improved DECT mobile phone needs to be paired with the improved base station, obtain the unique MAC address assigned by the improved base station, allocate a dedicated channel, and the improved base station records and saves the MAC address; Step 4: When the improved DECT mobile phone is in the middle of the two base stations, it actively connects to the improved base station with a strong signal and disconnects the improved base station with a weak signal to achieve data roaming; the DECT mobile phones under the improved base station group dial short numbers to make voice calls; The improved base station in step 1 comprises a main control CPU (1), a first DECT module (2), a second DECT module (3), a third DECT module (4), a frequency divider (5) and a quartz crystal oscillator VCTCXO (6); The first DECT module (2), the second DECT module (3), and the third DECT module (4) are connected to the main control CPU (1); the OUT1 pin of the frequency divider (5) is connected to the first DECT module, and the OUT2 pin of the frequency divider (5) is connected to the second DECT module (4) and the third DECT module (4); the quartz crystal oscillator (6) is connected to the IN1 pin and the IN2 pin of the frequency divider (5) via a capacitor; The main control CPU (1) is connected to the router.

2. A capacity expansion method based on a DECT mobile phone system according to claim 1, characterized in that: The first DECT module (2), the second DECT module (3) and the third DECT module (4) are each provided with a radio frequency antenna, which is responsible for registering the m registered DECT mobile phones.

3. A capacity expansion method based on a DECT mobile phone system according to claim 1, characterized in that: The quartz crystal oscillator (6) is a 13.824 MHz quartz crystal oscillator VCTCXO.

4. The capacity expansion method based on the DECT mobile phone system according to claim 1, characterized in that: The first DECT module (2), the second DECT module (3) and the third DECT module (4) share a quartz crystal oscillator VCTCXO.

5. The capacity expansion method based on DECT mobile phone system according to claim 1, characterized in that: The improved DECT mobile phone in step 1 comprises a central control CPU (7), a DECTA module (8) and a DECTB module (9), wherein the DECTA module (8) and the DECTB module (9) are connected to the central control CPU (7) and are also connected to an antenna; The DECTA module (8) is used for voice and video data processing and authentication of 10 DECT mobile phones; The DECTB module (9) enables roaming of the DECT mobile phone; specifically, when the improved DECT mobile phone is in the middle of two base stations, it actively connects to the improved base station with a strong signal and disconnects from the improved base station with a weak signal, thereby achieving data roaming.

6. The capacity expansion method based on DECT mobile phone system according to claim 1, characterized in that: The improved DECT mobile phone can directly dial an external network mobile phone through the improved base station group to perform voice communication with the external network mobile phone.

7. The capacity expansion method based on DECT mobile phone system according to claim 1, characterized in that: The number of the improved base stations in the improved base station group is determined according to the area of ​​the site and the number of people using DECT mobile phones.

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