CN108712749B - Method and system for covering strait mobile broadband - Google Patents

Abstract

Embodiments of the present invention provide a method and system for mobile broadband coverage in the strait. The method includes: after receiving the base station location information reported by each preset base station in the strait, sending the first type of frequency band allocation scheme to each base station; obtaining The communication resource requirements of each cell corresponding to each base station are allocated according to the first type of frequency band allocation scheme, and a target cell whose communication resource requirement is greater than a preset threshold is determined; the second type of frequency band allocation scheme is sent to the target cell The corresponding target base station, so that the target base station adjusts the antenna parameters based on the second type of frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell. The strait mobile broadband coverage method and system provided by the embodiments of the present invention allocate frequency bands for cells that require additional communication resources by dynamically adjusting the frequency band allocation mode of each cell in the strait, thereby improving the coverage capability and service quality of each cell in the strait.

Description

A method and system for mobile broadband coverage in the strait

technical field

Embodiments of the present invention relate to the technical field of offshore mobile broadband communication, and in particular, to a method and system for mobile broadband coverage in a strait.

Background technique

With the continuous development of my country's marine economy, more and more practitioners are involved in maritime activities such as tourism, transportation, fishing, and ocean monitoring. In order to ensure the safety and efficiency of operations in offshore waters and improve the quality of people's information life at sea, the marine broadband communication system has become an indispensable infrastructure for maritime activities. In particular, in relatively narrow strait waters, such as my country's Bohai Strait, Taiwan Strait and Qiongzhou Strait, ships are densely distributed, and there is a demand for large-capacity and high-density waterborne broadband communications. As an important part of offshore waters, strait waters urgently need cost-effective broadband coverage solutions.

Currently, traditional wireless communication means that can be used in strait scenarios include radio systems (MF/HF/VHF), maritime satellite phones, and shore-based LTE/WiMAX networks. These communication methods have their own advantages and disadvantages in coverage, bandwidth performance and use price. The communication method based on MF/HF/VHF can provide long-distance/medium-distance/short-distance ship-to-ship communication and ship-shore communication, and has played an important role in the field of maritime security such as tsunami warning, but can only provide narrowband communication. Maritime satellite can cover the whole world, and the use of maritime satellite phone requires the installation of maritime satellite receiving equipment on the ship, but in the scenario of strait communication, there are problems of expensive communication and insufficient bandwidth. Based on the communication method of deploying the shore-based LTE/WiMAX network, it can provide more than ten kilometers of strait coverage in the coverage area, and can provide relatively considerable bandwidth; and because the base station is established on both sides of the strait, its maintenance costs and use costs Compared with the first two methods, it also has obvious advantages. However, due to the network planning method and the inability to establish base stations on the water surface, the traditional cell-based strait water coverage method has the disadvantages of limited user density that can be supported by key strait routes and relatively limited bandwidth that can be allocated by a single user.

Therefore, there is an urgent need for a channel mobile broadband coverage method that can solve the above problems.

SUMMARY OF THE INVENTION

In order to solve the above problem, the embodiments of the present invention provide a method and system for mobile broadband coverage in the Strait that overcome the above problem or at least partially solve the above problem.

In the first aspect, an embodiment of the present invention provides a mobile broadband coverage method in the Strait, including:

After receiving the base station location information reported by each base station preset in the strait, send the first type of frequency band allocation scheme to each base station;

Obtaining the communication resource requirements of each cell corresponding to each base station after the allocation according to the first type of frequency band allocation scheme, and determining a target cell whose communication resource requirement is greater than a preset threshold;

The second type of frequency band allocation scheme is sent to the target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second type of frequency band allocation scheme to meet the mobile broadband coverage requirements of the target cell.

In the second aspect, the embodiment of the present invention provides a mobile broadband coverage method in the strait, including:

After reporting the location information of the base station, receive the first type of frequency band allocation scheme sent by the server;

After allocating according to the first type of frequency band allocation scheme, sending the communication resource requirement of the cell corresponding to the base station to the server, so that the server can determine the target cell whose communication resource requirement is greater than the preset threshold;

After receiving the second type of frequency band allocation scheme sent by the server, based on the second type of frequency band allocation scheme, the antenna parameters are adjusted to meet the mobile broadband coverage requirement of the target cell.

In the third aspect, an embodiment of the present invention provides a mobile broadband coverage system for the Straits, and the system includes:

The first frequency band allocation module is used to send the first type of frequency band allocation scheme to each base station after receiving the base station location information reported by each base station preset in the strait;

a determining module, configured to acquire the communication resource requirements of each cell corresponding to each base station after the allocation according to the first type of frequency band allocation scheme, and determine a target cell whose communication resource requirement is greater than a preset threshold;

The second frequency band allocation module is configured to send the second type of frequency band allocation scheme to the target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second type of frequency band allocation scheme to meet the requirements of the second type of frequency band allocation scheme. Mobile broadband coverage requirements of the target cell.

A fourth aspect The embodiment of the present invention provides a mobile broadband coverage device for the Strait, including:

a processor, a memory, a communication interface, and a bus; wherein, the processor, memory, and communication interface communicate with each other through the bus; the memory stores program instructions that can be executed by the processor, and the processing The above-mentioned mobile broadband coverage method for the Strait can be executed by the device calling the program instruction.

Fourth aspect An embodiment of the present invention provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the above method.

The strait mobile broadband coverage method and system provided by the embodiments of the present invention allocate frequency bands for cells that require additional communication resources by dynamically adjusting the frequency band allocation mode of each cell in the strait, thereby improving the coverage capability and service quality of each cell in the strait.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

1 is a flowchart of a method for mobile broadband coverage in a strait provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of rectangular cells of different widths provided by an embodiment of the present invention;

3 is a schematic diagram of a rectangular cell provided by an embodiment of the present invention;

4 is a comparison diagram of edge path loss between a traditional antenna cell and a rectangular cell provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a blind area arranged according to a traditional antenna cell sector coast provided by an embodiment of the present invention.

6 is a flowchart of another method for mobile broadband coverage in the strait provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of comparing the average path loss of users provided by an embodiment of the present invention;

8 is a structural diagram of a strait mobile broadband coverage system provided by an embodiment of the present invention;

FIG. 9 is a structural block diagram of a mobile broadband coverage device across the Strait provided by an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are disclosed. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiment of the present invention simulates the strait broadband coverage scheme provided by the prior art. The simulation is based on the Atoll network planning tool, and traditional antenna LTE base stations are deployed along both sides of the Qiongzhou Strait. The simulation parameters are set as shown in Table 1:

Table 1 Atoll simulation parameter table

The simulation results show that under the coverage method based on traditional cells, the area where the peak uplink rate is less than 256kbps exceeds 74%, and the area where the peak downlink rate is less than 1024kbps exceeds 83%. Except for near-shore users, the actual bandwidth of other users is very limited when technical means such as ultra-high antennas, increasing transmitter power, and high-gain antennas are not used. The coverage method based on traditional cells has small coverage and insufficient user capacity, which makes it difficult to meet the broadband communication needs in the strait waters.

In the prior art, technologies such as base station amplifiers and frequency optimization are also used, combined with traditional ground LTE coverage methods, to provide a wireless communication broadband network coverage method for air routes. The specific measures are to increase the antenna height, use high-gain base station antennas, and increase equipment power as hardware means; at the same time, frequency optimization is used to improve neighboring cells and handover/access parameters, and frequency bands suitable for long-distance transmission on the sea are used as software means. .

However, most of the improvement ideas provided by the existing technology start with power boosting and frequency selection and make corresponding special adjustments to improve the effective signal coverage strength on the sea surface, thereby improving the user's communication quality, and finally solve the problem that the communication distance is too long and the base station cannot Communication problems caused by factors such as deployment at sea. However, in the actual strait scenario, the communication load of base stations on both sides of the strait is quite different in space and time, and the above improvement ideas are not fully applicable. There is an order of magnitude difference between thousands of passengers on a large oil tanker and a dozen crew members on a small ship. When passing through the strait, there is a large difference in the load between the base stations, which is extremely uneven. In addition, a large number of sudden users often occupy communication resources on the route, such as a large number of emergency communication needs caused by severe weather such as sudden sea storms, resulting in insufficient real-time available communication capacity, and the load of the same base station at different times. The difference is also huge. Therefore, only relying on means such as increasing power cannot meet the needs of dynamic and diverse strait mobile broadband communication, and the increase in radiation, equipment loss, and energy waste caused by the use of high-power base stations are also open to question.

In view of the problems existing in the above-mentioned prior art, FIG. 1 is a flowchart of a method for mobile broadband coverage in a strait provided by an embodiment of the present invention. As shown in FIG. 1 , the method includes:

S1. After receiving the base station location information reported by each base station preset in the strait, send the first type of frequency band allocation scheme to each base station;

S2. Acquire the communication resource requirements of each cell corresponding to each base station after the allocation according to the first type of frequency band allocation scheme, and determine a target cell whose communication resource requirement is greater than a preset threshold;

S3. Send the second type of frequency band allocation scheme to the target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second type of frequency band allocation scheme to meet the mobile broadband coverage of the target cell need.

It should be noted that the execution body of the embodiment of the present invention is the backbone network server, and may also be any entity or virtual device that implements the server function, which is not limited by the embodiment of the present invention.

The channel mobile broadband coverage method provided by the embodiment of the present invention can be divided into two parts, the initialization coverage process of step S1 and the dynamic coverage process of step S2-step S3. In order to facilitate the understanding of the embodiment of the present invention, the embodiment of the present invention makes the following description :

In the embodiment of the present invention, it is assumed that the initialization time is t ₀ , there are M users who need to be served in the strait sea area, there are N shaped antenna base stations on the coastline, and K available frequency bands. where K>N. The set of base stations is N={N _n |n=1,2,...,N}. The available frequency band set is F={F _f |f=1,2,...,F}, and the frequency band sequence number is j. The set of users is A={A _a |a=1,2,...,N}, A _a represents the number of users served by the a-th base station, and the total number of users |A| satisfies |A|=M. The final frequency band allocation scheme is E={E _e |e=1,2,...,N}, where E _e represents the number of frequency bands allocated by the e-th base station. Before the initial coverage is started, all cells are not allocated frequency bands, and there are several users on the sea who need to be served.

In step S1, it can be understood that in this embodiment of the present invention, a plurality of base stations are set in the strait, and the specific base station setting can be arranged according to the demand distribution map of the strait broadband communication service. Specifically, along both sides of the strait from west to east , with historical average statistics as a reference, focusing on major air routes and major economic areas. In principle, one base station is arranged for every rectangular area of 800 to 1000 users to be served. The main radiation directions of the shaped antennas of each base station are basically parallel, and the cells served by the base station are set to be rectangular, with the center line of the strait as the axis of symmetry, and the two sides of the strait are staggered and numbered sequentially from west to east. Under special circumstances such as large differences in user density, the density of base stations on both sides of the Taiwan Strait can be adjusted appropriately to meet actual needs. Each base station selects an appropriate horizontal beam width, for example, the horizontal beam width is between 5° and 30° to complete coverage of the rectangular area of the cell to which the base station belongs.

In further specific arrangement, the parameter requirements of the shaped antenna of the base station need to satisfy that there is no blind area with seriously poor communication quality between adjacent cells, for example, a cell with an effective signal strength lower than -105dBm, and the embodiment of the present invention also allows adjacent base station cells to have less communication quality. Some coverage areas overlap.

After the base station completes the fixed-point arrangement, the position does not change. It should be noted that the base station equipment is equipped with the TD-LTE communication protocol, and the corresponding shaped antenna frequency points, power amplifiers and other parameters are configured in accordance with the TD-LTE standard.

In step S1, after the preset positions of each base station are determined, the embodiment of the present invention needs to initially allocate frequency bands for each base station. It can be understood that the embodiment of the present invention divides all available frequency bands into a first type of frequency band and a second type of frequency band. , the first type of frequency band is used to complete the frequency band allocation initialization to achieve full coverage of the service area, and may also be referred to as the basic frequency band in the embodiment of the present invention, and the second type of frequency band is the frequency band reserved for dynamic allocation after full coverage is completed. , which may also be referred to as a dynamic frequency band in this embodiment of the present invention. It can be understood that, whether it is the first type of frequency band or the second type of frequency band, the number of frequency bands included in the frequency band is not specifically limited in this embodiment of the present invention.

Correspondingly, the first type of frequency band allocation scheme is the initial frequency band allocation scheme formulated by the server for each base station, and the second type of frequency band allocation scheme is the dynamic frequency band allocation scheme subsequently formulated by the server for each cell with a large demand for communication resources.

It can be understood that after allocating the first type of frequency band to each cell in step S1, the broadband coverage of each cell can be basically guaranteed. When enough to meet the demand, the second type of frequency band needs to be allocated, so as to improve the service quality of the cell.

Then, in step S2, in the embodiment of the present invention, after initializing and allocating the first type of frequency band, the communication resource requirements of each cell are acquired, and the conventional acquisition method can periodically allow the base station to report the number of users to be served in its corresponding cell. Thus, a target cell whose communication resource requirement is higher than a preset threshold is determined. Preferably, the preset threshold provided by the embodiment of the present invention is 90%.

Further, in step S3, the embodiment of the present invention allocates the second type of frequency band other than the first type of frequency band to the target cell, and the frequency band allocation scheme is provided by the embodiment of the present invention. In the embodiment of the invention, the number of target cells may not be unique, so it is necessary to allocate the second type of frequency band to each target cell according to a certain allocation rule.

The strait mobile broadband coverage method and system provided by the embodiments of the present invention allocate frequency bands for cells that require additional communication resources by dynamically adjusting the frequency band allocation mode of each cell in the strait, thereby improving the coverage capability and service quality of each cell in the strait.

On the basis of the above embodiment, each preset base station in the strait is a shaped antenna base station, and correspondingly, each cell corresponding to each base station is a rectangular cell.

Different from the prior art, the base station provided by the embodiment of the present invention is a shaped antenna base station, and each cell is divided into a plurality of rectangular cells with different rectangular widths according to the user density. A schematic diagram of a cellular cell, referring to FIG. 2 , the rectangular cell solution provided by the embodiment of the present invention adopts a high-gain shaping antenna, and the transmitted energy is more directional and concentrated. The width of the rectangular cell can be determined by setting the horizontal beam width of the shaping antenna of the base station ( 5°～30°) to control. In actual operation, it can be allocated according to the actual user distribution density. For example, a cell is set up for every 1000 users, and an appropriate shaped antenna beam width is selected to ensure coverage of these 1000 users and cause minimal interference to adjacent cells.

Under the condition of the same total power, the rectangular cell width can be reasonably designed according to the user density. For example, narrow rectangular cells can be configured for high-density user areas such as important waterways, and wide rectangular cells can be configured for low-density user areas such as fishery economic zones. Rectangular cells can obtain more flexible coverage, improve signal strength in strait waters, and optimize communication quality.

降低，可能远低于预计的

此外，为了实现这种宏蜂窝结构必须使用大功率天线等设备以保证远端用户的通信质量，对基站设备提出了较高的要求。在海峡通信中，对于沿既定航线航行的油轮等载有大量用户的船舶而言，特别是当只有一个小区覆盖航线繁忙区域时，单用户可获得的带宽将十分有限，用户服务质量急剧下降。It is understandable that, in the traditional terrestrial LTE cell model, to expand the coverage, it is necessary to improve a series of energy indicators such as the signal strength of the base station and the sensitivity of the receiver. The total bandwidth that each base station can provide within its coverage is limited. Assuming that the total bandwidth is M, and the number of users within the coverage of the base station is N, the average bandwidth available to each user is M/N. The design of traditional LTE cells using macro cells uses sector beam antennas with large angles to cover the waters of the strait. The coverage area of a single cell is very large. Limited by radio frequency conditions, the total data transmission rate of the entire cell will be reduced, and the actual total bandwidth M' also declined. At the same time, due to the large coverage area of a single cell, the frequency reuse times are reduced under the same total coverage area, and the actual number of users N' that needs to be served in a single cell increases accordingly, and the data transmission rate that can be allocated to a single user will also be affected. limit. The above two reasons will make the average bandwidth actually allocated to each user

decrease, possibly much lower than expected

In addition, in order to realize such a macrocellular structure, equipment such as high-power antennas must be used to ensure the communication quality of remote users, which puts forward higher requirements for base station equipment. In the strait communication, for ships carrying a large number of users such as oil tankers navigating along a given route, especially when only one cell covers the busy area of the route, the bandwidth available to a single user will be very limited, and the user service quality will drop sharply.

与此同时，在使用较窄的小区时，在相同长度海岸线上可以部署更多基站，划分更多小区，提升频率复用次数，提高小区内总带宽M，进一步提升单用户平均带宽

However, the rectangular cell used in the embodiment of the present invention can effectively solve this problem. The base station of the rectangular cell is located on the long straight side of the coast. In practical applications, the coverage width of the cell can be appropriately adjusted according to the real-time user capacity. Referring to FIG. 2, it is assumed that The Cell-3 cell covers key waterways with heavy traffic, and the distribution density of users in the cell is high, while the Cell-9 cell covers the traditional economic zone, and the user distribution density in the cell is low. Taking this difference into account, the Cell-3 cell can be designed to be relatively narrow (width of h3) and the Cell-9 cell to be relatively wide (width of h9). By reducing the coverage area of the cell and reducing the number of users N in the cell, the average bandwidth of a single user in the cell is increased

At the same time, when using narrower cells, more base stations can be deployed on the coastline of the same length, more cells can be divided, the frequency reuse times can be increased, the total bandwidth M in a cell can be increased, and the average bandwidth of a single user can be further improved.

Further, the solutions provided by the embodiments of the present invention can also improve edge power, so that the signal strength at the edge of adjacent cells can be significantly improved, and coverage blind areas can be avoided.

It can be understood that under the same power, the distance between the cell edge of the traditional sector beam antenna cell and the central base station is approximately equal, and the signal strength of edge users is limited by the distance from the central base station, resulting in limited actual capacity of edge users. As shown in Figure 3, the four sides of AB, BC, CD, and DA of a rectangular cell are not equal. Among the four sides, only the opposite side AD of the base station will have the situation that the user's signal strength is limited by distance and transmit power. The other three sides BC, AB and CD, BC is located on the coastline and can be reinforced with traditional LTE, while AB and CD are connected to adjacent cells on the same shore. In simple terms, the signal strength of edge users on the AB side and the CD side decreases as the distance between the user and the base station increases. Most edge users will not be limited by the distance, and their signal power can be improved. Quality can also be improved as a result.

According to the path loss formula of the signal propagating on the sea surface:

Among them, λ is the wavelength, H _t and H _r are the heights of the base station B _i and the user U _j , respectively, d is the distance between them, L _boat is the loss of electromagnetic waves passing through the hull, and L _earth is caused by the curvature of the earth Diffraction loss, a is the correction factor. The path loss of edge users under the two coverage modes is calculated by Matlab simulation. Referring to Figure 4, it can be clearly seen that the path loss of the rectangular cell at the edges of 0°~60° and 120°~180° is significantly smaller than Traditional sector beam antenna cells. Due to the use of shaped antennas, the signal strength at the edges of rectangular cells, especially adjacent cells on the same bank, can be significantly improved.

At the same time, it should be noted that using the sector antenna coverage of the traditional shore-based base station will generate coverage blind spots. Referring to Figure 5, a triangular coverage blind spot will be generated between the coverage sectors of the B0 base station and the B1 base station. The traditional method also needs to perform additional processing for this blind area, and supplement the base station in the blind area to meet the demand. However, this problem can be avoided by using the rectangular base station provided by the embodiment of the present invention, and the closely arranged base stations can completely cover the blind area without additional processing.

On the basis of the above embodiment, after receiving the base station location information reported by each base station preset in the strait, the first type of frequency band allocation scheme is sent to each base station, which specifically includes:

After receiving the base station location information reported by each base station preset in the strait, obtain the location relationship matrix of the cell corresponding to the base station;

Based on the location relationship matrix of the corresponding cell of the base station, a base station sorting table is established, and the base station sorting table is sorted according to the number of adjacent base stations from large to small;

Based on the base station ranking table, formulate a first type of frequency band allocation scheme, and send the first type of frequency band allocation scheme to each base station, wherein the first type of frequency band allocation scheme is according to the order of each base station in the base station sorting table , and sequentially allocate one of the first-type frequency bands to each base station, so that any two adjacent base stations do not share the same frequency band.

The location relationship matrix of the cell corresponding to the base station is:

Among them, i and j are the base station numbers, b _i,j ={1or0}, when b _i,j is 1, it means that the cells corresponding to the i-th and j-th base stations are adjacent to each other, and when b _i,j is 0, it means The geographic locations of the cells corresponding to the i-th and j-th base stations are not adjacent.

It can be understood that in order to ensure that there are no blind spots and gaps between adjacent cells, in the specific physical implementation process, the phenomenon of partial overlap of beam coverage areas will inevitably occur, but if adjacent cells use the same frequency band, it will inevitably occur. Co-channel interference will occur. In order to avoid such co-channel interference as much as possible and save frequency band resources as much as possible, the embodiment of the present invention adopts the DSATUR algorithm to reuse multiple cells with fewer frequency bands, thereby realizing initial coverage of all cells. .

其中，i和j均为小区基站节点编号，均遍历两岸所有基站。此时B＝B^T，为对称阵。b_i,j＝{1or0}，为1时表示第i个和第j个两个小区基站地理位置相邻，为0时表示两小区基站不相邻，地理位置有间隔。特殊情况当i＝j时，b_i,j＝1。First, the embodiment of the present invention establishes a cell location relationship matrix between cells according to the location information of each cell

Among them, i and j are both cell base station node numbers, and both traverse all base stations on both sides of the strait. At this time, B=B ^T , which is a symmetric matrix. b _i,j ={1or0}, when it is 1, it means that the i-th and j-th cell base stations are geographically adjacent, and when it is 0, it means that the two cell base stations are not adjacent, and the geographical positions are separated. Special case when i=j, b _i,j =1.

Taking Figure 2 as an example, the corresponding matrix is:

When b _i,j =1 and i≠j, severe mutual interference will occur if two cell base stations i and j use the same frequency band.

Further, in this embodiment of the present invention, a base station ranking table is established according to the mutual interference matrix B, as shown in Table 2.

Table 2 Ranking table of base stations

Cell serial number 8 3,4,5,6,7 2,9,10 1,11 Number of adjacent cells 5 4 3 2

In Table 2, each cell is sorted according to the number of adjacent cells from large to small, and then frequency bands are allocated through multiple iterations, so that any two adjacent base stations do not share the same frequency band.

It can be understood that, select the base station that can be interfered with the most, that is, the base station with the largest number of adjacent cell base stations, that is, the base station with the largest ∑ _i |b _i,j | The frequency bands between adjacent base stations are different and will not cause interference. If there are multiple base stations with the same ∑ _i |b _i,j |, select one of them at random for operation. This operation is repeated continuously until all cell base stations have a basic frequency band, namely |E _i '|=1, and the frequency bands between adjacent base stations are different to ensure availability.

Taking Figure 2 as an example, the specific iterative process is as follows:

For the first iteration, assign frequency band No. 1 to cell 8;

In the second iteration, one of cells 3, 4, 5, 6, and 7 is randomly selected. In the embodiment of the present invention, cell 4 is taken as an example, and the No. 1 frequency band is allocated to cell 4;

In the third iteration, the remaining cell in the second iteration is randomly selected. In this embodiment of the present invention, cell 6 is used as an example. Because adjacent cells 4 and 8 are allocated the first frequency band, only the Band No. 2 is allocated to Cell 6;

In the fourth iteration, the remaining cell in the third iteration is randomly selected. In the embodiment of the present invention, cell 7 is used as an example, because adjacent cell 8 is allocated the first frequency band, and adjacent cell 6 is allocated the second frequency band. frequency band, so at this time only frequency band 3 can be allocated to cell 6;

In the fifth iteration, the remaining cell in the fourth iteration is randomly selected. In the embodiment of the present invention, cell 5 is used as an example, because the adjacent cell 4 is allocated the first frequency band, and the adjacent cell 6 is allocated the second frequency band. The adjacent cell 7 has allocated the No. 3 frequency band, so only the No. 4 frequency band can be allocated to the cell 5 at this time;

In the sixth iteration, at this time, only cell 3 has the most adjacent cells and has not been allocated. Because adjacent cell 4 is allocated the No. 1 frequency band, and adjacent cell 5 is allocated the No. 4 frequency band, at this time only Can assign frequency band No. 2 to cell 3;

In the seventh iteration, one of cells 2, 9, and 10 is randomly selected. In this embodiment of the present invention, cell 2 is used as an example, because adjacent cell 4 is allocated the No. 1 frequency band, and adjacent cell 3 is allocated No. 2 frequency band. frequency band, so only frequency band No. 3 can be allocated to cell 2 at this time;

In the eighth iteration, one of the remaining cells 9 and 10 in the seventh iteration is selected. In the embodiment of the present invention, cell 9 is used as an example, because the adjacent cell 7 is allocated the No. 3 frequency band, and the adjacent cell 8 is allocated No. 1 frequency band, so at this time, only No. 2 frequency band can be allocated to cell 9;

In the ninth iteration, the remaining cells 10 in the eighth iteration are selected. Because the adjacent cell 8 is allocated the No. 2 frequency band, and the adjacent cell 8 is allocated the No. 1 frequency band, only the No. 3 frequency band can be used at this time. Allocated to cell 10;

In the tenth iteration, one of cells 1 and 11 is randomly selected. In the embodiment of the present invention, cell 1 is used as an example, because the adjacent cell 2 is allocated the frequency band No. 3, and the adjacent cell 3 is allocated the frequency band No. 2. Therefore, at this time, only the No. 1 frequency band can be allocated to cell 1;

In the eleventh iteration, select the remaining cell 11 in the tenth iteration, because the adjacent cell 8 is allocated the No. 2 frequency band, and the adjacent cell 10 is allocated the No. 3 frequency band, so only the No. 1 frequency band can be allocated at this time. The frequency band is allocated to cell 11;

At this time, a total of 4 frequency bands are used, and the full coverage of all eleven cells is completed. Each cell has one frequency band, and the frequency bands of any two adjacent cells are different. The frequency band is basically used with maximum efficiency to meet the actual requirements for the frequency band. Finally, the first type of frequency band allocation results are obtained as shown in Table 3.

Table 3 The first type of frequency band allocation table

Cell serial number 1 2 3 4 5 6 7 8 9 10 11 Band number 1 3 2 1 4 2 3 1 2 3 1

Then, through the above process, the embodiment of the present invention can realize the initial frequency band allocation to each cell, and correspondingly complete the initial coverage.

On the basis of the above embodiment, the acquiring the communication resource requirements of the cells corresponding to the base stations after the allocation according to the first type of frequency band allocation scheme, and determining the target cells whose communication resource requirements are greater than a preset threshold, specifically includes:

Periodically obtain the number of service users in each cell corresponding to each base station after being allocated according to the first type of frequency band allocation scheme;

For any period, based on the number of service users in each cell, the communication resource requirements of each cell are obtained, and the cell whose communication resource requirement is greater than the preset threshold is used as the corresponding target cell in the period.

On the basis of the above embodiment, if there are multiple target cells, the second type of frequency band allocation scheme is sent to the target base station corresponding to the target cell, so that the target base station is based on the second type of frequency band allocation scheme , adjust the antenna parameters to meet the mobile broadband coverage requirements of the target cell, specifically including:

Obtain the number of service users in each target cell, and calculate the ratio of the number of service users between each target cell;

According to the proportion of the number of service users, formulate a second type of frequency band allocation scheme, and send the second type of frequency band allocation scheme to the target base station corresponding to the target cell, so that the target base station is based on the second type of frequency band Allocation scheme, adjusting antenna parameters to meet the mobile broadband coverage requirements of the target cell.

It can be understood that the process of dynamically allocating the second type of frequency band in the embodiment of the present invention is a periodic adjustment process, and the number of service users in each cell will be acquired every ΔT ₁ time, so that real-time service users are obtained according to the actual number of service users reported by each base station. User number set A, so as to update the user set in the existing strait, and form the user set A _S from all elements in A with a ratio of used communication resources higher than 90%, so as to allocate the second type of frequency band to each corresponding to A _S. The target cell enables the base station to serve according to the allocation scheme.

Specific allocation rules are preferably provided in the embodiment of the present invention as rounding the number of users in different cells in equal proportions according to the proportion of service users contained in different cells, and then allocating the frequency bands in the second type of frequency bands to each cell according to the proportion.

FIG. 6 is a flowchart of another strait mobile broadband coverage method provided by an embodiment of the present invention, as shown in FIG. 6 , including:

101. After reporting the location information of the base station, receive the first type of frequency band allocation scheme sent by the server;

102. After allocating according to the first type of frequency band allocation scheme, send the communication resource requirement of the cell corresponding to the base station to the server, so that the server can determine the target cell whose communication resource requirement is greater than a preset threshold;

103. After receiving the second type of frequency band allocation scheme sent by the server, adjust antenna parameters based on the second type of frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell.

It should be noted that the execution subject of the embodiment of the present invention is each base station node, and each base station node corresponds to the base stations actually arranged on both sides of the Taiwan Strait to realize broadband communication with users.

In step 101, each base station node provided in the embodiment of the present invention reports the location of each corresponding base station to the backbone network server, so that the backbone network server can formulate a corresponding first-type frequency band allocation scheme.

In step 102, after receiving the first type of frequency band allocation scheme sent by the backbone network server, the base station node completes the initial frequency band allocation to the cells corresponding to each base station, and then reports the number of service users in the cell to the server for the server to obtain the cell It can be understood that the reporting process is periodic reporting, and the base station node has obtained the user's location information, so that the server can determine the target cell and the target base station, and send the second type to the target base station node corresponding to the target base station. Band allocation scheme.

In step 103, after acquiring the second type of frequency band allocation scheme, the target base station node needs to adjust the antenna parameters of the base station accordingly, so as to meet the service requirements of the client.

Specifically, the antenna parameters of the base station provided by the embodiment of the present invention at least include dynamic adjustment of radiation phase, antenna transmit power, and downlink angle, and each base station node continues to periodically collect user coordinate information while serving users, so as to periodically send information to users. The backbone network server reports information.

Correspondingly, in the whole process, if the user terminal needs a broadband communication service, it needs to send a service request to the base station node, and at the same time send its own location to the base station node. In the whole dynamic running process, the user client can be divided into four states: entering the cell, serving the cell, switching the cell, and exiting the service.

Entering the cell state refers to the state in which the user client enters the user cell and requests services; the cell service state refers to the state in which the user is receiving the service of a single base station; the cell handover state refers to the user client switching from one cell A to another cell B The out of service state refers to the state in which the user client leaves the service scope.

When entering the cell, the user broadcasts its own service requirements and location information, establishes a service communication link after receiving feedback from a certain base station, and transfers to the cell service state; in the cell service state, the user client periodically sends its own location information, and communicates with the base station of the cell where it is located. Communication service interaction; when the user client enters the overlapping area covered by the cell due to its location change, it keeps sending its own location information periodically, and performs communication service interaction with the nearest base station; when exiting the service, the user client sends a service stop to the base station. message to stop sending location information.

On the basis of all the above-mentioned embodiments, the embodiment of the present invention simulates the provided strait mobile broadband coverage method. The embodiment of the present invention adopts the Atoll network planning tool, and the simulation parameter settings are the same as those in Table 1. Table 4 shows the effective antennas. signal coverage.

Table 4 Antenna effective signal coverage

It can be seen from Table 4 that the traditional antenna only has an effective coverage area of 16%, and a large signal is less than -105dBm, while the effective signal coverage of the antenna cell provided by the embodiment of the present invention can reach 98%.

Further, the analysis is based on the actual ship sailing data in the waters near the Qiongzhou Strait in my country during the week from October 22, 2015 to October 28, 2015. Calculate the rectangular area formed by (E109.95°, N 22.33°) and (E 110.95°, N19.88°). For the raw data, the data element is based on the single communication of the ship and is divided on an hourly basis. The data contains ship code, communication time and latitude and longitude coordinates. According to the above-mentioned base station arrangement principle, a rectangular cell base station is arranged in the selected area. Due to the slow running speed of the surface vessels and the long channel coherence time, a total of nearly 170 points of data can be obtained by taking one hour as the time interval, which is more representative. Calculate the average path loss of users in each hour for seven consecutive days (168 hours), and compare with the path loss of traditional cell base stations. Referring to Figure 7, compared with the traditional method, the average path loss of users in rectangular cells is lower than that of users in traditional cells. , the general difference is 3dB.

FIG. 8 is a structural diagram of a mobile broadband coverage system in the strait provided by an embodiment of the present invention. As shown in FIG. 8 , the system includes: a first frequency band allocation module 1, a determination module 2 and a second frequency band allocation module 3, wherein:

The first frequency band allocation module 1 is configured to send the first type of frequency band allocation scheme to each base station after receiving the base station location information reported by each base station preset in the strait;

The determining module 2 is configured to acquire the communication resource requirements of each cell corresponding to each base station after the allocation according to the first type of frequency band allocation scheme, and determine a target cell whose communication resource requirement is greater than a preset threshold;

The second frequency band allocation module 3 is configured to send the second type of frequency band allocation scheme to the target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second type of frequency band allocation scheme to meet the requirements of the Mobile broadband coverage requirements of the target cell.

Specifically, how to use the first frequency band allocation module 1, the determination module 2 and the second frequency band allocation module 3 to cover the strait mobile broadband can be used to implement the technical scheme of the embodiment of the method for strait mobile broadband coverage shown in FIG. 1, and its realization principle and technology The effect is similar and will not be repeated here.

The strait mobile broadband coverage system provided by the embodiment of the present invention allocates frequency bands for cells that need additional communication resources by dynamically adjusting the frequency band allocation mode of each cell in the strait, thereby improving the coverage capability and service quality of each cell in the strait.

An embodiment of the present invention provides a channel mobile broadband coverage device, including: at least one processor; and at least one memory communicatively connected to the processor, wherein: FIG. 9 is a schematic diagram of the channel mobile broadband coverage device provided by the embodiment of the present invention. Structural block diagram, referring to FIG. 9 , the Strait Mobile Broadband Covering Device includes: a processor (processor) 810, a communications interface (Communications Interface) 820, a memory (memory) 830 and a bus 840, wherein the processor 810, the communication interface 820 , the memories 830 communicate with each other through the bus 840 . The communication interface 820 may be used for information transfer between the server and the Strait Mobile Broadband coverage device. The processor 810 can call the logic instructions in the memory 830 to perform the following method: after receiving the base station location information reported by each base station preset in the strait, send the first type of frequency band allocation scheme to each base station; After the first-class frequency band allocation scheme is allocated, the communication resource requirements of each cell corresponding to each base station are determined, and the target cell whose communication resource requirement is greater than the preset threshold is determined; the second type of frequency band allocation scheme is sent to the target base station corresponding to the target cell , so that the target base station adjusts antenna parameters based on the second type of frequency band allocation scheme to meet the mobile broadband coverage requirements of the target cell.

An embodiment of the present invention discloses a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, The computer can execute the methods provided by the above method embodiments, for example, including: after receiving the base station location information reported by each base station preset in the strait, sending the first type of frequency band allocation scheme to each base station; After the allocation of the second-class frequency band allocation scheme, the communication resource requirements of each cell corresponding to each base station are determined, and the target cell whose communication resource requirement is greater than the preset threshold is determined; the second type of frequency band allocation scheme is sent to the target base station corresponding to the target cell, So that the target base station adjusts antenna parameters based on the second type of frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell.

Embodiments of the present invention provide a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the methods provided by the foregoing method embodiments, for example Including: after receiving the base station location information reported by each base station preset in the strait, sending the first type of frequency band allocation scheme to each base station; acquiring the communication of each cell corresponding to each base station after the allocation according to the first type of frequency band allocation scheme resource requirements, and determine the target cell whose communication resource requirement is greater than a preset threshold; send the second type of frequency band allocation scheme to the target base station corresponding to the target cell, so that the target base station is allocated based on the second type of frequency band The solution is to adjust the antenna parameters to meet the mobile broadband coverage requirements of the target cell.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or some parts of the embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A method for mobile broadband coverage of straits, comprising:

after receiving base station position information reported by each base station preset in the channel, sending the first class frequency band allocation scheme to each base station;

acquiring communication resource requirements of each cell corresponding to each base station after the first-class frequency band allocation scheme is allocated, and determining a target cell of which the communication resource requirements are greater than a preset threshold;

sending a second frequency band allocation scheme to a target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell;

each base station preset in the strait is a shaped antenna base station; correspondingly, each cell corresponding to each base station is a rectangular cell;

after receiving the base station location information reported by each base station preset in the channel, the method sends the first class frequency allocation scheme to each base station, and specifically includes:

after receiving base station position information reported by each base station preset in the strait, acquiring a position relation matrix of a cell corresponding to the base station;

establishing a base station ranking table based on the position relation matrix of the cell corresponding to the base station, wherein the base station ranking table is ranked according to the number of adjacent base stations from large to small;

based on the base station sequencing list, formulating a first class frequency band allocation scheme, and sending the first class frequency band allocation scheme to each base station, wherein the first class frequency band allocation scheme is to allocate one of the first class frequency bands to each base station in sequence according to the sequence of each base station in the base station sequencing list, so that any two adjacent base stations do not share the same frequency band;

if a plurality of target cells exist, the sending a second-class frequency band allocation scheme to a target base station corresponding to the target cell so that the target base station adjusts antenna parameters based on the second-class frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell specifically includes:

acquiring the number of service users in each target cell, and calculating the ratio of the number of the service users between the target cells;

and formulating a second-class frequency band allocation scheme according to the proportion of the number of the service users, and sending the second-class frequency band allocation scheme to a target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second-class frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell.

2. The method of claim 1, wherein the location relationship matrix of the cell corresponding to the base station is:

wherein i and j are base station numbers, b_i,j＝{1or0}，b_i,jWhen the number is 1, the geographic positions of cells corresponding to the ith base station and the jth base station are adjacent, b_i,jAnd when the value is 0, the geographic positions of the cells corresponding to the ith base station and the jth base station are not adjacent.

3. The method according to claim 1, wherein the obtaining of the communication resource requirement of the cell corresponding to each base station after the allocation according to the first-class frequency allocation scheme, and determining the target cell whose communication resource requirement is greater than a preset threshold specifically include:

periodically acquiring the number of service users in each cell corresponding to each base station after the allocation according to the first-class frequency band allocation scheme;

and for any period, acquiring the communication resource requirement of each cell based on the number of service users in each cell, and taking the cell with the communication resource requirement larger than a preset threshold value as a corresponding target cell in the period.

4. A method for mobile broadband coverage of straits, comprising:

after reporting the position information of the base station, receiving a first class frequency band allocation scheme sent by a server;

after the first-class frequency band allocation scheme is allocated, the communication resource requirements of the cells corresponding to the base station are sent to a server, so that the server can determine the target cell of which the communication resource requirements are greater than a preset threshold value;

after a second frequency band allocation scheme sent by a server is received, adjusting antenna parameters based on the second frequency band allocation scheme so as to meet the mobile broadband coverage requirement of the target cell;

after reporting the base station location information, the receiving server sends a first class frequency allocation scheme, which specifically includes:

after receiving base station position information reported by each base station preset in the strait, acquiring a position relation matrix of a cell corresponding to the base station;

establishing a base station ranking table based on the position relation matrix of the cell corresponding to the base station, wherein the base station ranking table is ranked according to the number of adjacent base stations from large to small;

based on the base station sequencing list, formulating a first class frequency band allocation scheme, and sending the first class frequency band allocation scheme to each base station, wherein the first class frequency band allocation scheme is to allocate one of the first class frequency bands to each base station in sequence according to the sequence of each base station in the base station sequencing list, so that any two adjacent base stations do not share the same frequency band;

if there are multiple target cells, after receiving a second frequency band allocation scheme sent by a server, adjusting antenna parameters based on the second frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cells, specifically including:

acquiring the number of service users in each target cell, and calculating the ratio of the number of the service users between the target cells;

and formulating a second-class frequency band allocation scheme according to the proportion of the number of the service users, and sending the second-class frequency band allocation scheme to a target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second-class frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell.

5. A strait mobile broadband coverage system, the system comprising:

the first frequency band allocation module is used for receiving base station position information reported by each base station preset in the strait and then sending a first class of frequency band allocation scheme to each base station;

a determining module, configured to obtain communication resource requirements of each cell corresponding to each base station after being allocated according to the first class frequency allocation scheme, and determine a target cell for which the communication resource requirements are greater than a preset threshold;

a second frequency band allocation module, configured to send a second frequency band allocation scheme to a target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second frequency band allocation scheme to meet a mobile broadband coverage requirement of the target cell;

the first frequency band allocation module is specifically used for acquiring a position relation matrix of a cell corresponding to a base station after receiving base station position information reported by each base station preset in the channel;

establishing a base station ranking table based on the position relation matrix of the cell corresponding to the base station, wherein the base station ranking table is ranked according to the number of adjacent base stations from large to small;

based on the base station sequencing list, formulating a first class frequency band allocation scheme, and sending the first class frequency band allocation scheme to each base station, wherein the first class frequency band allocation scheme is to allocate one of the first class frequency bands to each base station in sequence according to the sequence of each base station in the base station sequencing list, so that any two adjacent base stations do not share the same frequency band;

if a plurality of target cells exist, the sending a second-class frequency band allocation scheme to a target base station corresponding to the target cell so that the target base station adjusts antenna parameters based on the second-class frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell specifically includes:

acquiring the number of service users in each target cell, and calculating the ratio of the number of the service users between the target cells;

and formulating a second-class frequency band allocation scheme according to the proportion of the number of the service users, and sending the second-class frequency band allocation scheme to a target base station corresponding to the target cell, so that the target base station adjusts antenna parameters based on the second-class frequency band allocation scheme to meet the mobile broadband coverage requirement of the target cell.

6. A strait mobile broadband overlay device comprising a memory and a processor, wherein the processor and the memory communicate with each other via a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 4.

7. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 4.

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