KR20010035819A - Allotment method for the overhead channel in base station - Google Patents

Abstract

PURPOSE: A method for allocating overhead channels in a base station is provided to simplify a configuration and to remarkably cut costs by allocating the overhead channels of many sectors to a channel card of one sector. CONSTITUTION: A program to execute a method for allocating overhead channels in a base station confirms whether the number of sectors is '0'(301). If the number is not '0', the program determines a Sec_ind to allocate overhead channels, based on a formula(302). The program judges whether the Sec_ind determined by a variable 'i' appointed by a user is smaller than or equal to '0'(303). If it is judged that the Sec_ind is smaller than or equal to '0', the program allocates an overhead channel to a sector 'alpha'(304) and reduces one sector from the number S(305). In case that it is judged that the Sec_ind is larger than '0', the program allocates an overhead channel to a sector 'beta' or a sector 'gamma'(306).

Description

Overhead channel allocation method in base station {ALLOTMENT METHOD FOR THE OVERHEAD CHANNEL IN BASE STATION}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead channel allocation method in a code division multiple access (CDMA) base station. In particular, an overhead channel of several sectors is allocated to one or two sector channel cards. An overhead channel allocation method for allocation and a computer-readable recording medium having recorded thereon a program for realizing the same.

In general, in the case of local or beacon stations with a small amount of call, one channel card and a common unit (supply unit, analog common unit and one unit) are used for each sector under the current overhead allocation method, even though one channel card is not needed for each sector. Backboard, etc.) must be mounted in order to operate. Therefore, there is a problem that the cost is too much when installing a base station of a local or beacon local area with a small amount of call.

1 is a flowchart illustrating an overhead channel allocation method in a conventional base station. The overhead channel allocation method for a three-sector base station is described as follows.

First, it checks whether the number of sectors S of the base station is '0' (101). If the number of sectors is '0', it assigns the hoverhead to one of three sectors (102), and then assigns an overhead of the three sectors. After the number of sectors is reduced (103), the process proceeds to the process of checking the number of sectors (101).

This process is repeated to allocate overhead channels to all three sectors.

On the other hand, in the sector number checking process 101, if the number of sectors S is '0', the overhead channel allocation is terminated.

2 is a configuration diagram of a CDMA base station apparatus using a conventional overhead channel allocation method, wherein a first channel card 211 for transmitting and transmitting a digital signal of a sector and a second channel for transmitting and transmitting a digital signal of a sector are shown. Card 212, a third channel card 213 for transmitting and processing a digital signal of gamma sector and a first analog common card 214 for transmitting and processing an analog signal of a sector transmitted from the first channel card 211. ), And a second analog common card 215 for transmitting and transmitting an analog signal of the sector? Transmitted from the second channel card 212, and an analog signal for the? Sector transmitted from the third channel card 213. A third analog common card 215, a sector matching card 217 for upconverting the baseband frequency of each sector transmitted from the first to third analog common cards 214 to 216 into an intermediate frequency band, and a sector; Pass from matching card 217 A first upconverter 218 for upconverting the intermediate frequency signal of the? Sector to a high frequency signal and a second upconverter for upconverting the intermediate frequency signal of? Sector transmitted from the sector matching card 217 to a high frequency signal? A third upconversion unit 220 for upconverting the intermediate frequency signal of the? Sector transmitted from the sector matching card 217 to a high frequency signal, and? Transmitted from the first upconversion unit 218. A first amplifying unit 221 for amplifying the high frequency signal of the sector, a second amplifying unit 222 for amplifying the high frequency signal of the β sector transmitted from the second up-converting unit 219, and a third up-converting unit ( And a third amplifier 223 for amplifying the high frequency signal of the gamma sector transmitted from the 220.

As described above, in the conventional wireless communication system, an overhead channel for providing base station information from a base station to a terminal has been used by assigning at least one channel card to each sector. In this case, if the overhead channel is allocated to at least one channel card for each sector, the efficiency of use of the channel card decreases, and the analog common part becomes unnecessary for each sector, and the corresponding power part and the back board become unnecessary. There was a problem.

Accordingly, the present invention has been made to solve the above problems, and the configuration is simplified by allocating an overhead channel of several sectors to a channel card of one sector when a local or beacon local CDMA base station is installed with a small amount of call. It is an object of the present invention to provide a method for allocating an overhead channel in a base station that can significantly reduce costs and a computer-readable recording medium having recorded thereon a program for realizing the method.

1 is a flowchart of an overhead channel allocation method in a conventional base station.

2 is a block diagram of a base station apparatus using a conventional overhead channel allocation method.

3 is a flowchart illustrating an embodiment of an overhead channel allocation method in a base station according to the present invention.

4 is an exemplary configuration diagram of a base station apparatus to which the overhead channel allocation method of the present invention is applied.

5 is a detailed configuration diagram of the channel card and analog common card of FIG.

Explanation of symbols on the main parts of the drawings

411: channel card 412: analog common card

413: sector matching card 414 to 416: up-conversion unit

417 to 419: amplification unit

In order to achieve the above object, the present invention provides a method for allocating an overhead channel to a base station having a plurality of sectors, wherein the sector (Sec_ind) to which the overhead channel is allocated in the plurality of sectors is arbitrarily selected. Determining the first step; A second step of allocating an overhead channel to the determined sector (Sec_ind); And a third step of allocating an overhead channel and reducing the number of sectors by a predetermined number until all of the overhead channels are allocated to the plurality of sectors.

In addition, the present invention, the base station having a processor, a function for arbitrarily determining the sector (Sec_ind) to which the overhead channel to be allocated in a plurality of sectors of the base station; A function of allocating an overhead channel to the determined sector Sec_ind; And a computer-readable recording medium having recorded thereon a program for realizing a function of allocating an overhead channel and then reducing the number of sectors by a predetermined number until all the overhead channels are allocated to the plurality of sectors. to provide.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

3 is a flowchart illustrating an overhead channel allocation method in a base station according to the present invention. Referring to this, the overhead channel allocation process of the present invention will be described in detail as follows. However, it is assumed that the base station has α, β, and γ sectors.

First, by checking whether the number of sectors S is '0' (301), if the number of sectors S is not '0', the sector Sec_ind to which an overhead channel is to be allocated by the user is determined as shown in Equation 1 (302). Here, it is assumed that the number of sectors S of the base station is '3'.

Sec_ind = S-i

Where i is any variable set by the user.

Sec_ind = 1 determined by Equation 1 is α sector, Sec_ind = 2 is β sector, and Sec_ind = 3 is γ sector.

It is determined whether the sector Sec_ind determined by the user variable i is less than or equal to '0' (303), and if it is smaller or equal, the overhead channel is allocated to the sector (304), and then '1' in the number of sectors S The number of sectors is reduced (305), and the process proceeds to the sector number checking process (301).

If it is determined in the sector Sec_ind determination process 303 that it is determined to be larger than '0', after allocating an overhead channel to the sector beta or sector 306 (306), the process proceeds to the process of reducing the number of sectors (305).

Through this process, the user decides whether to allocate an overhead channel to only one sector or to allocate an overhead channel to two or three sectors.

On the other hand, if the number of sectors S is "0" in the sector number checking process 301, overhead channel allocation is terminated.

4 is an exemplary configuration diagram of a base station apparatus to which the overhead channel allocation method of the present invention is applied.

As shown in Fig. 4, the base station apparatus to which the present invention is applied is transmitted from a channel card 411 and a channel card 411 which respectively transmit and process digital signals of respective sectors (which are?,? And? Sectors). An analog common card 412 for transmitting and processing analog signals of each sector, a sector matching card 413 for upconverting the baseband frequency of each sector transmitted from the analog common card 412 to an intermediate frequency band, and sector matching Up-converters 414 to 415 and up-converters 414 to 415 for up-converting the intermediate frequency signals of the α, β and γ sectors transmitted from the card 413 to high-frequency signals, respectively; and amplifying units 416 to 418 for amplifying and transmitting the high frequency signals of the β and γ sectors, respectively.

The operation of the base station apparatus to which the present invention having the above configuration is applied will be described in detail as follows.

The channel card 411 combines the digital voice signals of the subscribers transmitted by the sectors α, β, and γ into sectors, converts them into analog signals, and converts the analog signals of the converted sectors into analog signals. When transmitting to 412, the analog common card 412 electrically combines the transmitted analog signal for each sector and outputs the same to the sector matching card 413.

In this way, the baseband analog signal, which is transmitted through the analog common card 412, is converted to the signal of the intermediate frequency band of 4.95 MHz for each sector through the sector matching card 413, and then converted again. The intermediate frequency signal of the sector is upconverted to a high frequency signal of 800MHz through the corresponding upconversion unit.

In this way, the converted high frequency signal of each sector is amplified to a sufficient power level through the corresponding one of the amplifiers 417 to 419 and then transmitted to the counterpart.

Therefore, the present invention, as described above, by using a single channel card and an analog common card to transmit and process the signals of each sector, the configuration is very simple compared to the conventional configuration that the channel card and analog common card is configured for each sector It was.

In addition, the number of the power supply unit and the back board disposed corresponding to the analog common card, likewise can be reduced in proportion to the analog common card according to the present invention.

5 is a detailed configuration diagram of the channel card and analog common card of FIG.

As shown in FIG. 5, the channel card of FIG. 4 combines an alpha sector combining and converter 511 which combines digital signals of an alpha sector into an analog signal, and combines digital signals of an alpha sector into an analog signal. A? Sector combiner and converter 512 for converting, and a? Sector combiner and converter 513 for converting digital signals of the? Sector into analog signals.

In addition, the analog common card of FIG. 4 includes an alpha sector combiner 521 for combining analog channel signals transmitted from the channel card with other channel cards having the same structure as the channel card, and the channel card. Combining the β sector combiner 522 for combining the analog signals of the β sector transmitted from other channel cards of the same structure with the channel card, and the analog signals of the gamma sector transmitted from the other channel cards of the same structure as the channel card. Γ sector coupler 523.

Referring to the operation of the channel card and the analog common card having such a configuration, the digital signals of the sector S are combined through the sector combining and converter 511 of the channel card and then converted into analog signals to convert the analog common card. Is transmitted to the α sector combiner 521, and analog signals thus processed through other channel cards are also transmitted to the α sector combiner 521. FIG. Then, the α sector combiner 521 of the analog common card combines the analog signals of the α sector transmitted from the plurality of channel cards and outputs them to the sector matching card 513.

The signals of the sector S and the sector S are also transmitted through the transmission process of the sector S.

As described above, the base station apparatus to which the present invention is applied has a plurality of channel cards having the same structure as that of the channel card, but the analog signals of each sector processed through the plurality of channel cards are structured as described above. Only one analog common card is processed.

Therefore, in the base station apparatus to which the present invention is applied, the analog signal of each sector transmitted from the plurality of channel cards is processed through only one analog common unit, so that the analog base station apparatus having the analog common card is provided for each sector. The number of common cards can be significantly reduced, and accordingly, the number of power supply units and back boards corresponding to analog common cards can be significantly reduced.

Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, in the present invention, a pilot channel used by allocating an overhead channel of three sectors to a channel card of one sector in a local area having a small call volume and a channel card of each sector in a beacon local area is used. By assigning and using the channel card in one sector, the efficiency of the channel card in two sectors can be improved, and the cost for the common part (power supply part, analog common part, and back board) can be significantly reduced.

Claims (6)

In the method for allocating an overhead channel to a base station having a plurality of sectors, A first step of arbitrarily determining a sector (Sec_ind) to which an overhead channel is to be allocated in the plurality of sectors; A second step of allocating an overhead channel to the determined sector (Sec_ind); And A third step of allocating an overhead channel and then reducing the number of sectors by a predetermined number until all of the overhead channels are allocated to the plurality of sectors; Overhead channel allocation method in a base station comprising a. The method of claim 1, The first step is, A fourth step of checking whether the plurality of sectors S is '0'; A fifth step of terminating the overhead channel allocation if it is determined in the fourth step that the number of sectors S is '0'; And A sixth step of determining, by the user, the sector Sec_ind if the number of sectors S is not " 0 " Overhead channel allocation method in a base station comprising a. The method of claim 2, In the sixth step, The method of allocating an overhead channel in a base station characterized in that the sector (Sec_ind) is determined according to the following equation. Sector Sec_ind = S-i (Where i is any variable set by the user) The method according to any one of claims 1 to 3, The second step, A seventh step of determining whether the sector Sec_ind determined in the first step is smaller than or equal to '0'; An eighth step of allocating an overhead channel to a first sector of the plurality of sectors when it is determined that the determined sector Sec_ind is less than or equal to '0' in the seventh step; And In the seventh step, if it is determined that the determined sector Sec_ind is greater than '0', a ninth step of allocating an overhead channel to a second sector or a third sector of the plurality of sectors. Overhead channel allocation method in a base station comprising a. The method according to any one of claims 1 to 3, The third step, After the overhead channel is allocated to the sector Sec_ind determined in the first step, the number of sectors is reduced by '1', The overhead channel in the base station, characterized by reducing the number of sectors by '1' after allocating an overhead channel to the determined sector Sec_ind until all the overhead channels are allocated to the plurality of sectors. Assignment method. To a base station equipped with a processor, A function of arbitrarily determining a sector (Sec_ind) to which an overhead channel is to be allocated in a plurality of sectors of the base station; A function of allocating an overhead channel to the determined sector Sec_ind; And A function of reducing the number of sectors by a predetermined number after allocating an overhead channel until all the overhead channels are allocated to the plurality of sectors. A computer-readable recording medium having recorded thereon a program for realizing this.