CN100353802C

CN100353802C - Method for automatic statistic small village covering range

Info

Publication number: CN100353802C
Application number: CNB2004100695026A
Authority: CN
Inventors: 邢平平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-06-28
Filing date: 2004-06-28
Publication date: 2007-12-05
Anticipated expiration: 2024-06-28
Also published as: CN1717093A

Abstract

The present invention provides a method for automatically counting cell covering ranges, which counts data frames of random access channels reported by a base station through a base station controller for obtaining opening transmission time delay. Consequently, a distance between a mobile terminal and an antenna of a cell is calculated. The covering range of the cell is counted. The method can be used for the optimization of wireless networks.

Description

A kind of method of automatic statistic small village covering range

Technical field

The present invention relates to moving communicating field, refer to a kind of method of automatic statistic small village covering range especially.

Background technology

When the structure wireless system, hope can realize required overlay area with minimum cost, makes it possible to realize covering widely, and the position of base station is far away as much as possible, as long as radio wave can normal propagation.So wireless network planning is extremely important in network is built and runed, and has comprised the concrete plan and the network optimization of initial layout, capacity and covering.The concrete plan of initial layout, capacity and covering has realized covering, capacity and the business need of network substantially, but when network operation, also need carry out the continuous network optimization, in order to reach seamless covering, is very important at the optimization that covers.But the network optimization is undertaken by drive test usually, needs great amount of manpower and material resources and time.

When network is not subject to capacity, cover extremely important, for example, more typical in the rural area in the stage of initial network configuration.Macrocell covers and to have determined uplink coverage, because the transmitting power of travelling carriage is than little many of the power of macro cell base station.The typical output power value of travelling carriage is 21dBm (125mW), and the typical output power value of the every sector of macro cell base station is 40-46dBm (10-40W).

Up link covers and can be used for up-link (DCH), also can be used for common signal channel, for example Random Access Channel (Random access channel, RACH).If want to improve the covering of cdma system, we need confirm that restriction factor is dedicated channel or common signal channel in covering.If up-link can provide needed quality in any position,, therefore also can obtain RACH message owing to have the ability to begin to connect.Clearly, the bit rate dedicated channel covers little than RACH.

Random Access Channel (RACH) is commonly used to command transmitting, to network registry, carries out the position and upgrade after a zone moves to another zone, and initialization is carried out in calling, so RACH has determined the maximum coverage range of system behind starting up of terminal.If network only is used for to the low bit speed rate business provides continuous covering by planning, the covering of RACH is just extremely important, and the coverage of RACH has determined the coverage of sub-district.

The shortcoming of prior art: the prior art scheme needs lot of manpower and material resources and time, because the network optimization is generally undertaken by drive test, by the road measuring device image data, analyzes.

Summary of the invention

The invention provides a kind of method of automatic statistic small village covering range, realize simple.

The method of automatic statistic small village covering range provided by the invention comprises the following steps:

1A) base station controller receives the rach data frame information that the base station reports, and obtains the propagation delay time of eating dishes without rice or wine from this Frame;

1B), calculate the distance of portable terminal to antenna in cell according to the propagation delay time of eating dishes without rice or wine, and the distance value that goes out of storage computation;

1C) repeating step A and B in the unit interval arrived up to the time of a certain setting;

1D) obtain maximum in the distance value, and with the maximum covering radius of this maximum as this sub-district;

1E) obtain minimum value in the distance value, and with the minimum covering radius of this minimum value as this sub-district.Described step 1D) comprises the following steps:

First distance value that 2A) will calculate is stored in the memory cell;

Second distance value that 2B) will calculate and the numeric ratio in this memory cell be size, and deposits the greater in this memory cell;

2C) will calculate the 3rd, the 4th to the last distance value respectively with this memory cell in numeric ratio size, and deposit the greater in this memory cell;

2D) with the distance value in this memory cell, as the maximum covering radius of this sub-district.

According to said method of the present invention, also include according to the portable terminal that calculates and the distance of antenna in cell, obtain the step of the radial distribution tables of data of cell mobile terminal in a certain setting-up time.

According to said method of the present invention, also include radial distribution tables of data according to described portable terminal, drawing out with number of users and radial distance is the step of the user path of reference axis to distribution map.

The present invention's ten thousand methods, by wireless network side, statistics obtains the maximum coverage range and the smallest coverage of sub-district easily, and can count mobile subscriber's radial distribution.Those statisticses can be used for network optimization process, the coverage condition of assessment network, and as being the center with the antenna, maximum covering radius is that radius is drawn circle in the plane, can draw the coverage of each sub-district, and whether coverage hole is arranged; In addition,, may occur " tower is black down " if minimum covering radius is too big, promptly lean in the nearer scope of antenna ratio and can not receive signal.The inventive method is compared with use road measuring method of the prior art, has saved lot of manpower and material resources.

Description of drawings

Fig. 1 is the flow chart of the inventive method.

Fig. 2 is the mobile subscriber's radial distribution figure in the present invention's one example.

Embodiment

The present invention proposes a kind of method of automatic statistic small village covering range, this method is: the RACH Frame information that base station controller (RNC) accounting base-station reports, " Propagationdelay " information representation in RACH data frame structure propagation delay time of eating dishes without rice or wine, be in the random access procedure subscriber equipment to NodeB (Node B, the base station) wave point One Way Delay, unit are chip (chip).The propagation delay time data obtain eating dishes without rice or wine from the RACH Frame, go out the distance of portable terminal by the propagation delay time data computation of eating dishes without rice or wine to antenna in cell, portable terminal is to the ultimate range and the minimum range of antenna in cell in the statistical unit time, can obtain the coverage (minimum and maximum covering radius) of the RACH of this sub-district, according to stating as can be known of front, the coverage of RACH has determined the maximum coverage range of system.Utilize this method can add up the access radial distribution of mobile terminal device simultaneously.

Fig. 1 is a statistics cell coverage area flow chart of the present invention, and for convenience of description, this paper is that example describes with the WCDMA system.

Step 101: base station controller is accepted RACH (Random Access Channel) the Frame information that the base station reports, and the RACH Frame has comprised " Propagation delay " information, the propagation delay time of promptly eating dishes without rice or wine.

Step 102: can obtain the propagation delay time of eating dishes without rice or wine from this Frame, according to 3GPP TS 25.425 agreements, the propagation delay time of eating dishes without rice or wine is that subscriber equipment is to the wave point One Way Delay of NodeB (Node B, base station) in the random access procedure, and unit is chip (chip).

Step 103: calculate the distance of portable terminal to antenna in cell according to the propagation delay time of eating dishes without rice or wine, the time delay of 1chip in the WCDMA system (chip) means that the length in path is 78.125 meters.

Step 104: the result who calculates in the step 103 is stored in the memory, by comparing, obtain a maximum and minimum value,, be stored in the memory cell of a special storage maximum and minimum value as the maximum covering radius and the minimum covering radius of this sub-district.The statistics of maximum and minimum value can be a recursive procedure, and can restart statistics by operator's control of base station controller.

Step 105: the mobile subscriber who calculates according to step 103 is to the distance of antenna in cell, and the radial distribution that can add up the user in certain period as shown in Table 1, is 100 apart from the number of users that is 11 unit distances radially in a certain period.According to table one, also may draw out user path shown in Figure 2 to distribution map.

Table one:

Radial distance (unit distance)	Number of users (number)
Radial distance (unit distance)	Number of users (number)	1	0
2	30	1	0
2	30	3	40
4	50	3	40
4	50	5	50
6	60	5	50
6	60	7	70
8	90	7	70
8	90	9	85
10	90	9	85
10	90	11	100
12	95	11	100
12	95	13	95
14	80	13	95
14	80	15	75
16	70	15	75
16	70	17	60
18	50	17	60
18	50	19	30
20	0	19	30

Method of the present invention can realize obtaining mobile subscriber's radial distribution information of sub-district maximum, smallest coverage value and sub-district at RNC (base station controller), and these information stores can utilize these data messages to carry out the network optimization in memory.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.

Claims

1, a kind of method of automatic statistic small village covering range comprises the following steps:

1A) base station controller receives the rach data frame information that the base station reports, and obtains the propagation delay time of eating dishes without rice or wine from this Frame information;

1E) obtain minimum value in the distance value, and with the minimum covering radius of this minimum value as this sub-district.

2, the method for automatic statistic small village covering range as claimed in claim 1 is characterized in that: described step 1D) comprise the following steps:

First distance value that 2A) will calculate is stored in the memory cell;

3, the method for automatic statistic small village covering range as claimed in claim 1 or 2 is characterized in that: also include the following step:

According to the distance of portable terminal that calculates and antenna in cell, obtain the radial distribution tables of data of cell mobile terminal in a certain setting-up time.

4, the method for automatic statistic small village covering range as claimed in claim 3 is characterized in that: also include the following step:

According to the radial distribution tables of data of described portable terminal, drawing out with number of users and radial distance is that the user path of reference axis is to distribution map.