CN1968487A - Wireless cellular network and wireless cellular network expansion realizing method - Google Patents

Abstract

The invention discloses a wireless cellular network and a method for realizing expansion of the wireless cellular network. The system includes a base station and its corresponding terminal, and a splitting module is added in the base station, and the splitting module is used to expand the multi-sector structure At least one sector of the base station is split into corresponding multiple sub-sectors, and the combined coverage area of the multiple sub-sectors corresponds to the coverage area of the corresponding sector before splitting. The method of the present invention, the steps include: splitting at least one sector of a base station with a multi-sector structure into corresponding multiple sub-sectors, and the joint coverage area of the multiple sub-sectors corresponds to that of the corresponding sector before splitting Coverage area; set the corresponding carrier in the split sub-sector. In the present invention, each sector of the base station is split into multiple sub-sectors, and carriers are re-set in each split sub-sector, thereby increasing the number of terminals corresponding to the base station and realizing expansion of the wireless cellular network.

Description

Wireless cellular network and method for realizing expansion of wireless cellular network

technical field

The invention relates to a mobile communication technology, in particular to a wireless cellular network and a method for realizing expansion of the wireless cellular network.

Background technique

With the sharp increase in the number of mobile terminals, the existing network structure has not adapted to the requirements of network development, and it is urgent to transform the existing network to achieve network expansion or wide coverage.

Now there are two methods for network expansion or wide coverage. One is to add base stations or increase base station frequencies in the existing three-sector network structure. By adding base stations, the number of terminals that can be accommodated in the network can be increased to achieve the purpose of network expansion. However, the expansion of the network is aimed at the hotspots where the number of terminals increases, and the distribution of these hotspots is uneven. Therefore, if the above-mentioned expansion is realized, the network needs to be re-planned, which increases the cost of network construction, and , the area covered by the base station is already very small, and it is impossible to split the cell by adding base stations to achieve capacity expansion. However, the method of increasing the frequency of base stations not only realizes network expansion, but also occupies precious spectrum resources, and is likely to cause an island effect and affect the communication quality of the network.

Another method is to change the existing three-sector network structure, such as increasing the number of antennas, and changing the existing three-sector network structure to a network structure with six or more sectors. FIG. 1 is a schematic diagram of changing the existing three-sector network structure into a six-sector network structure by using six antennas 1 . With this expansion method, more carriers can be allocated within the increased sector coverage. The increase in the number of carriers corresponds to the increase in the number of terminals, which can realize network expansion. However, this expansion scheme also has shortcomings, that is, the multi-sector network structure after expansion destroys the existing three-sector network structure, resulting in increased interference between areas covered by adjacent sectors; The overlapping area between the multi-sector coverage formed after expansion and the coverage of other three-sectors without expansion is relatively large, which also affects the efficiency of expansion. In addition, when using this method of increasing the number of antennas for capacity expansion, the network needs to be re-planned, and the pointing and downtilt angles of the antennas need to be re-adjusted, which requires a lot of work.

Expansion of the communication network is an inevitable stage in the development of communication technology, but the expansion methods currently used are still more or less unsatisfactory. Therefore, a reasonable, simple and efficient expansion method is urgently needed.

Contents of the invention

Aiming at the shortcomings of the prior art, the present invention provides a wireless cellular network and a method for realizing expansion of the wireless cellular network, which can easily and efficiently expand the capacity of the communication network.

The wireless cellular network of the present invention includes a base station and its corresponding terminal, and a splitting module is added in the base station,

The splitting module is used to split at least one sector of the base station with a multi-sector structure into corresponding multiple sub-sectors, and the joint coverage area of the multiple sub-sectors corresponds to the coverage area of the corresponding sector before splitting.

The above-mentioned splitting module may be a plurality of parallel antennas.

The above-mentioned splitting module may be a multi-beam antenna.

The present invention also provides a method for realizing expansion of the wireless cellular network, the steps of which include:

Step 1, splitting at least one sector of the base station with a multi-sector structure into corresponding multiple sub-sectors, and the joint coverage area of the multiple sub-sectors corresponds to the coverage area of the corresponding sector before splitting;

Step 2, setting the corresponding carrier in the above split sub-sectors.

In the present invention, by splitting at least one sector of the base station of the multi-sector structure into a plurality of sub-sectors, and ensuring that the joint coverage area of the multiple sub-sectors corresponds to the coverage area of the corresponding sector before the splitting, and then Carriers are reset in each split sub-sector, thereby increasing the number of terminals corresponding to the base station, and realizing expansion of the wireless cellular network.

Description of drawings

FIG. 1 is a schematic structural diagram of a base station of a wireless cellular network using six antennas for capacity expansion in the prior art;

Fig. 2 is a schematic structural diagram of a base station of a wireless cellular network according to the present invention;

Fig. 3 is the antenna pattern when the wireless cellular network is a three-sector structure in the prior art;

Fig. 4 is the antenna pattern when the wireless cellular network of the present invention is a three-sector structure;

Fig. 5 is a flow chart of the method for realizing expansion of the wireless cellular network according to the present invention.

Detailed ways

In the wireless cellular network and the method for realizing the expansion of the wireless cellular network according to the present invention, by splitting the sector of the base station into multiple sub-sectors, and resetting the carrier in each split sub-sector, thereby increasing the base station's corresponding The number of terminals realizes the expansion of the wireless cellular network.

The wireless cellular network of the present invention includes a base station and its corresponding terminals, and a splitting module is added in the base station, and the splitting module is used to split at least one sector of a base station with a multi-sector structure into corresponding multi-sector sub-sectors, the joint coverage area of multiple sub-sectors corresponds to the coverage area of the corresponding sector before splitting, that is, the joint coverage area of multiple sub-sectors can be equal to the coverage area of the corresponding sector before splitting, or it can be In the case of no interference between adjacent base stations, the joint coverage area of multiple sub-sectors is larger than the coverage area of the corresponding sector before splitting.

The aforementioned splitting module may be multiple parallel antennas or multi-beam antennas. After using multiple parallel antennas or multi-beam antennas, at least one sector of a base station with a multi-sector structure is split into multiple sub-sectors of a corresponding number.

The wireless cellular network resets the carrier in each sub-sector formed after splitting by the splitting module. Since the number of sub-sectors formed after splitting has increased compared with that before splitting, the corresponding number of carriers that can be reset also increases accordingly, that is to say, the number of terminals corresponding to the base station also increases accordingly, thereby realizing expansion of the wireless cellular network.

The present invention will be further described below in conjunction with the accompanying drawings.

Take the wireless cellular network as an example with a three-sector structure. As shown in Fig. 2, the base station of the three-sector wireless cellular network is provided with three splitting modules 2, and each splitting module 2 can split each sector of the base station into two corresponding sub-sectors.

Fig. 4 is an antenna pattern in a certain direction formed by adopting the above-mentioned splitting module on the base station of the wireless cellular network, and the antenna patterns in the other two directions are similar. It can be seen from FIG. 4 that the original sector is split into the current sub-sector 3A and sub-sector 3B. Compared with the three-sector antenna pattern formed by the antenna used in the prior art shown in FIG. 3 , after the splitting module 2 is applied, the original sector 3 is split at the corresponding sector position There are two sub-sectors 3A, 3B, and the joint coverage area of these two sub-sectors 3A, 3B corresponds to the coverage area of the main sector 3 .

As mentioned above, after splitting each sector into two sub-sectors in a base station with a three-sector structure, six sub-sectors will be obtained, and the base station can reset the number of carriers in these split sub-sectors. An increase in the number of zones corresponds to an increase in the number of carriers, that is, the number of terminals corresponding to each base station can be increased, thereby realizing network expansion.

When actually expanding the base station with the above-mentioned three-sector structure, the splitting module may be a plurality of parallel antennas or multi-beam antennas. In this case, each sector of the base station will be split into a corresponding number of multiple sub-sectors. By setting the performance parameters of the above-mentioned parallel antennas or multi-beam antennas, the joint coverage area of each sub-sector formed by multiple parallel antennas or multi-beam antennas can correspond to the coverage area of the corresponding sector before splitting. In this way, under the condition of not changing the coverage area of the base station, corresponding carriers are set in each sub-sector formed after splitting, so as to realize network expansion.

Take the expansion of the network with three-sector structure by using two parallel antennas as an example. When two parallel antennas are used, the design can ensure that the combined coverage area of the two sub-sectors after the two parallel antennas are split corresponds to the coverage area of the corresponding sector before the split. In this way, the number of sectors increases, and more carriers can be set, which is equivalent to increasing the number of terminals. In the present invention, it can also be designed to ensure that the antenna pattern formed by two parallel antennas is left-right symmetrical, that is, each sector of the base station is split into two corresponding left-right symmetrical sub-sectors. , theoretically the network capacity will be doubled.

In the above example, two parallel antennas are used in the expansion of the three-sector network. Since the three-sector structure of the wireless cellular network is not changed, there is no need to adjust the antenna's pointing and downtilt angle when installing the antenna, which can easily realize network expansion. expansion.

Still taking the expansion of the base station with a three-sector structure as an example. The splitting module described in the present invention can also be a multi-beam antenna formed by an array antenna, and this multi-beam antenna can better shape the radiation pattern of the antenna and improve the efficiency of the antenna unit. For example, a multi-beam antenna formed by four columns of antenna elements is used to distribute the network through amplitude and phase. Figure 4 is a sector diagram formed by using a multi-beam antenna. By setting the parameters of the multi-beam antenna, the joint coverage area of the sub-sectors 3A and 3B formed by the multi-beam antenna can be equal to the coverage area of the corresponding sector, and It is left-right symmetrical distribution. The amplitude ratio is 0.4/1/1/0.4 in turn; but the phases of the two antenna patterns are different and symmetrical. For the left beam, the phase distribution is -270/-180/-90/0, and for the right beam, the phase The distribution is 0/-90/-180/-270.

Compared with the aforementioned scheme of using two parallel antennas to expand the capacity of the three-sector network, after using the multi-beam antenna, without changing the three-sector structure of the wireless cellular network, there is no need to adjust the direction and direction of the antenna when installing the antenna. In addition, the number of antennas on each base station is still three, which is easy to install and makes network expansion more convenient and efficient.

For the expansion of other multi-sector networks, the structure of the base station is similar to the base station structure in the above-mentioned three-sector wireless cellular network. A splitting module is added to the base station to split at least one sector of the base station into multiple sub-sectors. sector, and the joint coverage area of multiple sub-sectors corresponds to the coverage area of the corresponding sector before splitting. Then, the number of carriers is reset in these split sub-sectors, so that the number of terminals corresponding to each base station can be increased, and network expansion can be realized.

The present invention also provides a method for realizing wireless cellular network expansion, as shown in Figure 5, comprising the following steps:

Step 101, split at least one sector of a base station with a multi-sector structure into corresponding multiple sub-sectors, and the combined coverage area of the multiple sub-sectors corresponds to the coverage area of the corresponding sector before splitting.

In the present invention, a splitting module can be used to split at least one sector of a base station with a multi-sector structure into multiple sub-sectors, and the joint coverage area of multiple sub-sectors corresponds to the coverage area of the corresponding sector before splitting .

In actual capacity expansion, the splitting module can be multiple parallel antennas or multi-beam antennas. When the splitting module is used to split each sector of the base station, by setting the parameters of the parallel antenna or multi-beam antenna, the joint coverage area of multiple sub-sectors formed by the parallel antenna or multi-beam antenna can correspond to the The coverage area of the corresponding sector.

For example, in the base station with a three-sector structure in FIG. 4 , the base station uses a multi-beam antenna to form two sub-sectors 3A, 3B, that is, two antenna patterns are formed. In the figure, the two sub-sectors 3A, 3B formed by a multi-beam antenna The coverage area of 3B is the same as that of the corresponding sector 3 before splitting, and the two sub-sectors formed after splitting are left-right symmetrical. In FIG. 4 , the amplitude ratios of the antenna pattern are 0.4/1/1/0.4 in sequence. But the phases of the two antenna patterns are different and symmetrical. For the left beam, the phase distribution is -270/-180/-90/0, and for the right beam, the phase distribution is 0/-90/-180/-270.

Step 102, setting the corresponding carrier in the split sub-sector.

In the present invention, the corresponding carriers can be reset in the sub-sectors obtained by splitting. After splitting each sector in step 101, the number of sectors in the network increases, and each sector corresponds to a certain number of carriers, that is, corresponds to a certain number of terminals. Therefore, the present invention can be used to set more number of carriers. That is, more terminals can be accommodated in the network, thereby realizing network expansion.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (9)

1. a wireless cellular network comprises base station and corresponding terminal thereof, it is characterized in that, is provided with the splitting module in the described base station,

This splitting module is used at least one sector splitting of the base station of many sector strucres is corresponding a plurality of sub-sector, the overlay area of the corresponding sector of the combined coverage areas of a plurality of sub-sectors before corresponding to splitting.

2. wireless cellular network as claimed in claim 1 is characterized in that, described base station is three sector strucres.

3. wireless cellular network as claimed in claim 1 or 2 is characterized in that, described splitting module is a multi-beam antenna.

4. wireless cellular network as claimed in claim 1 or 2 is characterized in that, described splitting module is a plurality of and array antenna.

5. wireless cellular network as claimed in claim 4 is characterized in that, described splitting module is two and array antenna.

6. wireless cellular network as claimed in claim 5 is characterized in that, described splitting module is two corresponding symmetrical sub-sectors with at least one sector splitting of base station.

7. a method that realizes wireless cellular network expansion is characterized in that, may further comprise the steps:

Step 1, at least one sector of the base station of the many sector strucres of splitting are corresponding a plurality of sub-sector, the overlay area of the corresponding sector of the combined coverage areas of a plurality of sub-sectors before corresponding to splitting;

Step 2 is provided with corresponding carrier wave in the sub-sector after above-mentioned splitting.

8. method as claimed in claim 7 is characterized in that, in the described step 1, the base station is three sector strucres.

9. as claim 7 or 8 described methods, it is characterized in that in the described step 1, at least one sector of splitting base station is two corresponding symmetrical sub-sectors.

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