A method for improving the communication distance of a portable terminal and a portable terminal communication system

Abstract

The present invention discloses a method for improving the communication distance of a portable terminal and a portable terminal communication system, including: detecting cells within a first communication range according to a cell search, obtaining first cell information, and selecting a cell for on-network communication according to the first cell information; when there is no on-network cell, connecting a high-gain antenna module and setting a frequency band mapping relationship; performing a cell search according to the frequency band mapping relationship, obtaining second cell information, and selecting the optimal cell for on-network communication according to the second cell information and a network selection strategy. The present invention connects and configures a high-gain antenna module so that the high-gain antenna module configures the frequency band mapped by the high-gain antenna module according to demand, and establishes a frequency band mapping relationship between the portable terminal and the base station side, so that the communication distance of the portable terminal is no longer limited by the radio frequency power, thereby improving the communication distance of the portable terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of cellular network communication, and in particular to a method for improving the communication distance of a portable terminal and a portable terminal communication system. Background Art

[0002] At present, in cellular communication systems, the effective communication distance is mainly limited by the transmission capability of portable terminals. The RF output power of portable terminals has a certain limit. If the effective communication distance is to be increased, one way is to increase the antenna gain. However, due to product appearance and dust and water resistance considerations, current portable terminals usually do not support external antennas, and the antenna gain of built-in antennas is relatively limited; another way is to solve the problem by building a station. However, in remote mountainous areas and other sparsely populated areas, the profit of the site is far from enough to cover the site construction and operation costs, and operators will give up building sites. Summary of the invention

[0003] The present invention provides a method for improving the communication distance of a portable terminal and a portable terminal communication system, so as to solve the problem that the communication distance of the existing portable terminal is limited by the radio frequency output power and the communication distance is short.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a method for improving the communication distance of a portable terminal, comprising:

[0005] Detecting cells within the first communication range according to the cell search, obtaining first cell information, and selecting a cell for on-network communication according to the first cell information;

[0006] When there is no resident cell, a high-gain antenna module is connected and the frequency band mapping relationship is set;

[0007] A cell search is performed according to the frequency band mapping relationship to obtain second cell information, and an optimal cell is selected for on-network communication according to the second cell information and a network selection strategy.

[0008] The present invention connects and configures a high-gain antenna module so that the high-gain antenna module configures the frequency band mapped by the high-gain antenna module as required, establishes a frequency band mapping relationship between a portable terminal and a base station side, and realizes the built-in antenna of the portable terminal and the frequency band replacement of an external high-gain antenna, thereby performing a cell search according to the configured high-gain antenna module to select the optimal cell for on-site communication, so that the communication distance of the portable terminal is no longer limited by the radio frequency power, thereby improving the communication distance of the portable terminal.

[0009] Furthermore, when there is no resident cell, a high-gain antenna module is connected and a frequency band mapping relationship is set, specifically:

[0010] When there is no resident cell in the first cell information, obtaining APN information in the first cell information, and determining whether the high-gain antenna module is connected according to the APN information;

[0011] If the high-gain antenna module is connected, the frequency band mapping relationship is set according to the mapping instruction.

[0012] Further, the frequency band mapping relationship is set according to the mapping instruction, specifically:

[0013] Obtaining configuration authority of the high-gain antenna module according to the configuration interface, and controlling the high-gain antenna module according to the configuration authority;

[0014] Sending a mapping instruction to the high-gain antenna module, wherein the mapping instruction includes frequency band mapping information;

[0015] A frequency band mapping relationship is set according to the mapping instruction and the frequency band mapping information.

[0016] Further, performing a cell search according to the frequency band mapping relationship, acquiring second cell information, and selecting an optimal cell for on-network communication according to the second cell information and a network selection strategy, is specifically as follows:

[0017] Determine a required frequency band according to the frequency band mapping relationship, perform a cell search for cells within a second communication range according to the high-gain antenna module and the required frequency band, and obtain second cell information;

[0018] The optimal cell is determined according to the second cell information and the network selection strategy, and the frequency band mapping relationship of the high-gain antenna is configured according to the cell information of the optimal cell to complete the cellular network access.

[0019] Further, determining the optimal cell according to the second cell information and the network selection strategy is specifically:

[0020] Acquire second cell information, where the second cell information includes communicable cells within the required frequency band and corresponding cell information;

[0021] The communicable cells are sorted according to a preset weighted algorithm to determine the optimal cell.

[0022] In a second aspect, the present invention provides a portable terminal communication system for implementing a method for improving the communication distance of a portable terminal, comprising: a portable terminal and a high-gain antenna module;

[0023] The portable terminal and the high-gain antenna module are connected according to antenna coupling;

[0024] The portable terminal includes an antenna detection configuration module and a cellular communication module;

[0025] The high-gain antenna module includes a configuration module and a frequency band mapping module.

[0026] Furthermore, the antenna detection configuration module is used to determine whether to establish a connection with the high-gain antenna module according to the cell information, and send a mapping instruction to the high-gain antenna module with which the connection has been established.

[0027] Furthermore, the cellular communication module is used to connect to the high-gain antenna module; perform cell search, and synchronize the obtained cell information to the antenna detection configuration module.

[0028] Further, the configuration module includes a number of configuration interfaces, and the configuration module is connected to the antenna detection configuration module;

[0029] The configuration module receives a mapping instruction from the antenna detection configuration module, obtains frequency band mapping information according to the mapping instruction, and forwards the frequency band mapping information to the frequency band mapping module.

[0030] Furthermore, the mapping module is used to configure the frequency band mapping relationship according to the frequency band mapping information to achieve mutual mapping of the frequency bands of the portable terminal and the base station side. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A flow chart of a method for improving the communication distance of a portable terminal provided by an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of a system structure of a portable terminal communication system provided by an embodiment of the present invention;

[0033] Figure 3 Another schematic diagram of a flow chart of a portable terminal communication system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figure 1 , Figure 1 A flowchart of a method for improving the communication distance of a portable terminal provided by an embodiment of the present invention includes steps 101 to 103, which are specifically as follows:

[0037] Step 101: Detecting cells within a first communication range according to a cell search, obtaining first cell information, and selecting a cell for on-network communication according to the first cell information;

[0038] In this embodiment, a cell search is performed based on the cellular communication module of the portable terminal to detect cells within the first communication range. If there is cell information that can achieve effective communication except for the high-gain antenna module, the cell can be stationed on the network. Then, the best cell is selected for stationing communication according to the network selection strategy; otherwise, the high-gain antenna module is connected.

[0039] Step 102: When there is no resident cell, a high-gain antenna module is connected and a frequency band mapping relationship is set;

[0040] In this embodiment, when there is no resident cell, a high-gain antenna module is connected and a frequency band mapping relationship is set, specifically:

[0041] When there is no resident cell in the first cell information, obtaining APN information in the first cell information, and determining whether the high-gain antenna module is connected according to the APN information;

[0042] If the high-gain antenna module is connected, the frequency band mapping relationship is set according to the mapping instruction.

[0043] In this embodiment, the portable terminal determines whether the high-gain antenna module is connected according to the APN information in the first cell information. Specifically, after the portable terminal is connected to the high-gain antenna module, the high-gain antenna module will send an APN with specific characters to the portable terminal, such as APN: "HighGainAntennaModule". After the portable terminal recognizes the APN string, it can be confirmed that it is connected to the high-gain antenna module.

[0044] In this embodiment, after the portable terminal is connected to the high-gain antenna module, the portable terminal sends a mapping instruction to the high-gain antenna module.

[0045] In this embodiment, the frequency band mapping relationship is set according to the mapping instruction, specifically:

[0046] Obtaining configuration authority of the high-gain antenna module according to the configuration interface, and controlling the high-gain antenna module according to the configuration authority;

[0047] Sending a mapping instruction to the high-gain antenna module, wherein the mapping instruction includes frequency band mapping information;

[0048] A frequency band mapping relationship is set according to the mapping instruction and the frequency band mapping information.

[0049] In this embodiment, the portable terminal connects to the high-gain antenna module through a configuration interface to obtain the configuration authority of the high-gain antenna module. The configuration authority can be used to control the switch of the high-gain antenna module, set the frequency band mapping relationship of the high-gain antenna module, and set parameters such as the frequency band center band and bandwidth.

[0050] In this embodiment, instructions are mapped to the high-gain antenna module according to the requirements of the cellular communication module. The mapping instructions include frequency band mapping information. The frequency band mapping information includes frequency band mapping relationships, setting parameters such as frequency band center frequency and bandwidth.

[0051] In this embodiment, the high-gain antenna module obtains the frequency band mapping information and establishes a segment mapping relationship between the portable terminal and the base station side according to the frequency band mapping information. For example, the high-gain antenna module is set to B46 with a connection bandwidth of 20M. The high-gain antenna module will adjust the air interface connection specifications with the portable terminal as required, and map the frequency bands working on the base station side, such as B40, B28, etc. to B46. The mapping bandwidth is limited to the configured bandwidth. Even if the communication bandwidth between the portable terminal and the high-gain antenna module is 20M, the bandwidth of the high-gain antenna module mapping the base station side will also be limited to 20M.

[0052] Step 103: Perform a cell search according to the frequency band mapping relationship, obtain second cell information, and select the best cell for on-network communication according to the second cell information and the network selection strategy.

[0053] In this embodiment, performing a cell search according to the frequency band mapping relationship, acquiring second cell information, and selecting an optimal cell for on-network communication according to the second cell information and a network selection strategy are specifically as follows:

[0054] Determine a required frequency band according to the frequency band mapping relationship, perform a cell search for cells within a second communication range according to the high-gain antenna module and the required frequency band, and obtain second cell information;

[0055] The optimal cell is determined according to the second cell information and the network selection strategy, and the frequency band mapping relationship of the high-gain antenna is configured according to the cell information of the optimal cell to complete the cellular network access.

[0056] In this embodiment, the high-gain antenna module configures the frequency band mapped by the high-gain antenna module according to the demand, and re-searches the cell. Finally, the frequency band mapping relationship of the high-gain antenna is reconfigured through the cell information searched by the high-gain antenna to achieve cellular network access.

[0057] In this embodiment, if the portable terminal needs to connect to the 5G network, the portable terminal can configure a high-gain antenna module, change the working frequency band from B46 to N46, and re-search the cell according to the frequency band N46 mapped by the high-gain antenna module. Finally, the frequency band mapping relationship of the high-gain antenna is reconfigured through the cell information searched by the high-gain antenna to achieve cellular network access.

[0058] In this embodiment, determining the optimal cell according to the second cell information and the network selection strategy is specifically:

[0059] Acquire second cell information, where the second cell information includes communicable cells within the required frequency band and corresponding cell information;

[0060] The communicable cells are sorted according to a preset weighted algorithm to determine the optimal cell.

[0061] In this embodiment, the second cell information is decoded according to the standard parts of the cellular communication module of the portable terminal to obtain RSRP (Reference Signal Receiving Power), SINR (Signal to Interference plus Noise Ratio) and other information, and all cells are ranked according to a preset weighted algorithm. Finally, the top-ranked cell is selected and a cell network request is sent to it.

[0062] In this embodiment, by connecting and configuring a high-gain antenna module so that the high-gain antenna module configures the frequency band mapped by the high-gain antenna module as required, a frequency band mapping relationship between the portable terminal and the base station side is established, and the built-in antenna of the portable terminal is replaced with the frequency band of the external high-gain antenna, so that a cell search is performed according to the configured high-gain antenna module to select the optimal cell for on-site communication, so that the communication distance of the portable terminal is no longer limited by the radio frequency power, thereby improving the communication distance of the portable terminal.

[0063] Please refer to Figure 2 , Figure 2 A schematic diagram of the system structure of a portable terminal communication system provided by an embodiment of the present invention.

[0064] In this embodiment, the portable terminal communication system is used to implement the method for improving the communication distance of the portable terminal, including: a portable terminal and a high-gain antenna module;

[0065] The portable terminal and the high-gain antenna module are connected according to antenna coupling;

[0066] The portable terminal includes an antenna detection configuration module and a cellular communication module;

[0067] The high-gain antenna module includes a configuration module and a frequency band mapping module.

[0068] In this embodiment, the antenna detection configuration module is used to determine whether to establish a connection with the high-gain antenna module according to the cell information, and send a mapping instruction to the high-gain antenna module with which the connection has been established.

[0069] In this embodiment, the antenna detection configuration module of the portable terminal determines whether the high-gain antenna module is connected to the high-gain antenna module through the APN information contained in the cell information, and sends relevant configuration commands to the high-gain antenna module according to the requirements of the cellular communication module. For example, the cellular communication module needs to search for the existence of base station cells within the range of 2300-2320M of B40, and will send mapping instructions for the frequency band to the high-gain antenna module through the module. In this way, the cellular communication module parses B46 on the surface, but actually parses the information of B40. In this way, the cellular communication module finally obtains the cell information searched by the high-gain antenna, and selects the best cell to stay in the network according to the network selection strategy.

[0070] In this embodiment, the cellular communication module is used to connect to the high-gain antenna module; perform cell search, and synchronize the obtained cell information to the antenna detection configuration module.

[0071] In this embodiment, the cellular communication module of the portable terminal first performs a cell search, obtains the first cell information, and synchronously forwards the first cell information to the high-gain antenna detection and configuration module. When the cellular communication module does not detect the cell information that can achieve effective communication except the high-gain antenna module, it will connect to the high-gain communication module through B46. Then, in the connected state, the portable terminal configures the frequency band mapped by the high-gain antenna module as required through the high-gain antenna module, and re-searches the cell. Finally, through the second cell information searched by the high-gain antenna, the frequency band mapping relationship of the high-gain antenna module is reconfigured to achieve cellular network access. If the cellular communication module wants to connect to the 5G network, the portable terminal can configure the high-gain antenna module, change the working frequency band from B46 to N46, and re-search the cell.

[0072] In this embodiment, the configuration module includes a number of configuration interfaces, and the configuration module is connected to the antenna detection configuration module;

[0073] The configuration module receives a mapping instruction from the antenna detection configuration module, obtains mapping frequency band information according to the mapping instruction, and forwards the frequency band mapping information to the frequency band mapping module.

[0074] In this embodiment, the configuration module of the high-gain antenna module provides a set of configuration interfaces. After obtaining the high-gain antenna module configuration authority, the portable device can turn on and off the high-gain antenna module, set the frequency band mapping relationship, set the frequency band center frequency band and bandwidth and other parameters. The configuration module will forward the frequency band mapping related information to the frequency band mapping module.

[0075] In this embodiment, the mapping module is used to configure the frequency band mapping relationship according to the frequency band mapping information to achieve mutual mapping of the frequency bands of the portable terminal and the base station side.

[0076] In this embodiment, the frequency band mapping module of the high-gain antenna module is mainly responsible for mapping the frequency bands on the portable terminal and the base station side. Under default conditions, the frequency band mapping module is connected to the portable terminal through B46 (5150-5925MHz). Because B46 is an unlicensed frequency band, it complies with regulatory requirements. After the frequency band mapping module is connected to the portable terminal, it will automatically configure the frequency band mapping relationship according to the frequency band mapping information forwarded by the configuration module. For example, the configuration module sets the B46 connection bandwidth to 20M, and the frequency band mapping module will adjust the air interface connection specifications with the portable device as required. The frequency band mapping module can map the frequency bands working on the base station side, such as B40, B28, etc., to B46, and the mapping bandwidth is limited to the configured bandwidth. Even if the communication bandwidth between the portable device and the high-gain antenna module is 20M, the bandwidth of the high-gain antenna module mapping the base station side will also be limited to 20M.

[0077] In this embodiment, the power module of the high antenna gain module is mainly used to provide a stable power supply for the modulation and demodulation and frequency band configuration circuits in the high gain antenna module.

[0078] In this embodiment, the function of replacing the frequency band of the built-in antenna of the portable terminal with that of the external high-gain antenna is realized through frequency band mapping, and the performance of the external antenna in receiving and sending radio frequency signals is obtained according to the frequency band mapping, thereby improving the communication distance of the portable terminal.

[0079] The embodiment of the present invention further provides a device for improving the communication distance of a portable terminal, comprising a primary search module, a frequency band mapping module and a secondary search module.

[0080] The primary search module is used to detect cells within the first communication range according to the cell search, obtain first cell information, and select a cell for on-network communication according to the first cell information;

[0081] The frequency band mapping module is used to connect the high-gain antenna module and set the frequency band mapping relationship when there is no resident cell;

[0082] The secondary search module is used to perform a cell search according to the frequency band mapping relationship, obtain second cell information, and select the best cell for on-network communication according to the second cell information and the network selection strategy.

[0083] In this embodiment, the frequency band mapping module is specifically used to:

[0084] When there is no resident cell in the first cell information, obtaining APN information in the first cell information, and determining whether the high-gain antenna module is connected according to the APN information;

[0085] If the high-gain antenna module is connected, the frequency band mapping relationship is set according to the mapping instruction.

[0086] In this embodiment, the frequency band mapping module is specifically used to:

[0087] Obtaining configuration authority of the high-gain antenna module according to the configuration interface, and controlling the high-gain antenna module according to the configuration authority;

[0088] Sending a mapping instruction to the high-gain antenna module, wherein the mapping instruction includes frequency band mapping information;

[0089] A frequency band mapping relationship is set according to the mapping instruction and the frequency band mapping information.

[0090] In this embodiment, the secondary search module is specifically used for:

[0091] The performing of cell search according to the frequency band mapping relationship, acquiring second cell information, and selecting the optimal cell for on-network communication according to the second cell information and the network selection strategy is specifically:

[0092] Determine a required frequency band according to the frequency band mapping relationship, perform a cell search for cells within a second communication range according to the high-gain antenna module and the required frequency band, and obtain second cell information;

[0093] The optimal cell is determined according to the second cell information and the network selection strategy, and the frequency band mapping relationship of the high-gain antenna is configured according to the cell information of the optimal cell to complete the cellular network access.

[0094] In this embodiment, the secondary search module is specifically used for:

[0095] The determining the optimal cell according to the second cell information and the network selection strategy is specifically:

[0096] Acquire second cell information, where the second cell information includes communicable cells within the required frequency band and corresponding cell information;

[0097] The communicable cells are sorted according to a preset weighted algorithm to determine the optimal cell.

[0098] Please refer to Figure 3 , Figure 3 Another schematic diagram of a flow chart of a portable terminal communication system provided by an embodiment of the present invention.

[0099] In this embodiment, the cellular communication module of the portable terminal first performs a cell search and forwards the first cell information to the antenna detection configuration module. If the cellular communication module does not detect any cell information other than the high-gain antenna module that can achieve effective communication, it connects to the high-gain communication module through B46.

[0100] In this embodiment, the antenna detection configuration module parses the first cell information, obtains the APN information, determines whether the high-gain antenna module exists based on the APN information, and sends relevant configuration commands, i.e., mapping instructions, to the configuration module of the high-gain antenna module according to the requirements of the cellular communication module.

[0101] In this embodiment, the configuration module receives the relevant configuration command, obtains the frequency band mapping information, and forwards the frequency band mapping information to the frequency band mapping module.

[0102] In this embodiment, the frequency band mapping module automatically configures the frequency band mapping relationship according to the frequency band mapping information forwarded by the configuration module, and re-searches the cell network according to the high-gain antenna module. The frequency band mapping relationship of the high-gain antenna is reconfigured based on the cell information searched by the high-gain antenna to achieve cellular network access.

[0103] In this embodiment, by connecting and configuring a high-gain antenna module so that the high-gain antenna module configures the frequency band mapped by the high-gain antenna module as required, a frequency band mapping relationship between the portable terminal and the base station side is established, and the built-in antenna of the portable terminal is replaced with the frequency band of the external high-gain antenna, so that a cell search is performed according to the configured high-gain antenna module to select the optimal cell for on-site communication, so that the communication distance of the portable terminal is no longer limited by the radio frequency power, thereby improving the communication distance of the portable terminal.

[0104] In an embodiment of the present invention, a multi-device access platform processing device is also provided, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the above-mentioned multi-device access platform processing method is implemented.

[0105] In an embodiment of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the above-mentioned multi-device access platform processing method.

[0106] Exemplarily, the computer program may be divided into one or more modules, one or more modules are stored in a memory and executed by a processor to implement the present invention. One or more modules may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program in the multi-device access platform processing device.

[0107] The multi-device access platform processing device may be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The multi-device access platform processing device may include, but is not limited to, a processor, a memory, and a display. Those skilled in the art will appreciate that the above components are merely examples of the multi-device access platform processing device and do not constitute a limitation on the multi-device access platform processing device. It may include more or fewer components than the components, or a combination of certain components, or different components. For example, the multi-device access platform processing device may also include input and output devices, network access devices, buses, and the like.

[0108] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the multi-device access platform processing device, and uses various interfaces and lines to connect various parts of the entire multi-device access platform processing device.

[0109] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the multi-device access platform processing device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, a text conversion function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, text message data, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0110] Among them, if the module based on the processing of the multi-device access platform is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0111] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for improving the communication distance of a portable terminal, characterized in that: include: Detecting cells within the first communication range according to the cell search, obtaining first cell information, and selecting a cell for on-network communication according to the first cell information; When there is no resident cell, a high-gain antenna module is connected and the frequency band mapping relationship is set; A cell search is performed according to the frequency band mapping relationship to obtain second cell information, and an optimal cell is selected for on-network communication according to the second cell information and the network selection strategy. Specifically: a required frequency band is determined according to the frequency band mapping relationship, and a cell search is performed on cells within the second communication range according to the high-gain antenna module and the required frequency band to obtain second cell information; an optimal cell is determined according to the second cell information and the network selection strategy, and a frequency band mapping relationship of the high-gain antenna is configured according to the cell information of the optimal cell to complete cellular network access.

2. A method for improving the communication distance of a portable terminal as claimed in claim 1, characterized in that: When there is no resident cell, a high-gain antenna module is connected and a frequency band mapping relationship is set, specifically: When there is no resident cell in the first cell information, obtaining APN information in the first cell information, and determining whether the high-gain antenna module is connected according to the APN information; If the high-gain antenna module is connected, the frequency band mapping relationship is set according to the mapping instruction.

3. A method for improving the communication distance of a portable terminal as claimed in claim 2, characterized in that: The frequency band mapping relationship is set according to the mapping instruction, specifically: Obtaining configuration authority of the high-gain antenna module according to the configuration interface, and controlling the high-gain antenna module according to the configuration authority; Sending a mapping instruction to the high-gain antenna module, wherein the mapping instruction includes frequency band mapping information; A frequency band mapping relationship is set according to the mapping instruction and the frequency band mapping information.

4. A method for improving the communication distance of a portable terminal as claimed in claim 1, characterized in that: The determining the optimal cell according to the second cell information and the network selection strategy is specifically: Acquire second cell information, where the second cell information includes communicable cells within the required frequency band and corresponding cell information; The communicable cells are sorted according to a preset weighted algorithm to determine the optimal cell.

5. A portable terminal communication system, characterized in that: A method for improving the communication distance of a portable terminal according to any one of claims 1 to 4, comprising: a portable terminal and a high-gain antenna module; The portable terminal and the high-gain antenna module are connected according to antenna coupling; The portable terminal includes an antenna detection configuration module and a cellular communication module; The high-gain antenna module includes a configuration module and a frequency band mapping module.

6. A portable terminal communication system as claimed in claim 5, characterized in that: The antenna detection configuration module is used to determine whether to establish a connection with the high-gain antenna module according to the cell information, and send a mapping instruction to the high-gain antenna module with which the connection has been established.

7. A portable terminal communication system as claimed in claim 5, characterized in that: The cellular communication module is used to connect to the high-gain antenna module; perform cell search, and synchronize the obtained cell information to the antenna detection configuration module.

8. A portable terminal communication system as claimed in claim 5, characterized in that: The configuration module includes a number of configuration interfaces, and the configuration module is connected to the antenna detection configuration module; The configuration module receives a mapping instruction from the antenna detection configuration module, obtains frequency band mapping information according to the mapping instruction, and forwards the frequency band mapping information to the frequency band mapping module.

9. A portable terminal communication system as claimed in claim 5, characterized in that: The frequency band mapping module is used to configure the frequency band mapping relationship according to the frequency band mapping information, so as to realize the mutual mapping of the frequency bands of the portable terminal and the base station side.

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