KR20070022070A - Method and system for determining service area location in mobile communication network - Google Patents

Abstract

An object of the present invention is to perform a simple system to check whether a mobile device is located in a service area of a wireless repeater, and to perform a two-way wireless signal amplification between the mobile device, the wireless base station device, and the wireless base station device and the mobile device. A service area position determination method performed in a mobile communication network, comprising the steps of: in a wireless repeater, assigning an identification code for identifying a service area by a self to a radio signal from a radio base station to a mobile device; In the base station, determining that the radio signal directed to the mobile device includes notification information relating to the identification signal, and confirming whether the mobile station is located in the service area by the wireless repeater using the identification code and the notification information. By the wireless repeater When confirming that is located in the service area has a step of transmitting a signal indicating the meaning of the base transceiver station.

Mobile device, wireless repeater, service area, location determination, identification code

Description

Method and system for determining location of service area in mobile communication network

The present invention provides a CDMA in which a plurality of repeaters (hereinafter referred to as 'repeaters') having a two-way radio amplification function from a wireless base station to a mobile base station and a mobile base station from a mobile base station are provided in a service area constituted by one wireless base station. The present invention relates to a mobile communication network based on a scheme, and more particularly, to a service area position determination method in a mobile communication network that detects whether a mobile device is located in an area serviced by a repeater.

 Japanese Laid-Open Patent Publication No. 63-51727 discloses a configuration in which a repeater is arranged between a radio base station and a radio terminal to prepare a new service area by this relay device.

As position information detection in the CDMA system, a plurality of methods (RTT, OTDOA, etc.) employing a propagation delay difference of the base station-moving period are employed. This is to calculate the positional information of the mobile unit spatially by measuring propagation delay difference between the plurality of base stations and the movement period.

In a mobile communication network in which a repeater is arranged in a service area constituted by a radio base station, in the propagation path via the repeater, control delay of the radio signal in the repeater occurs, so that propagation delay between the base station and the mobile period can be properly corrected. Estimation cannot be performed and position information cannot be calculated normally.

In the CDMA system, the initial transmission power value determination of the individual channel (DPCH) and the transmission power value determination of the downlink common channel (FACH) have been performed in the following procedure.

1. The base station notifies the transmit power value of the downlink pilot channel (PCPICH) as the notification information.

2. The mobile unit measures the received power value of the downlink pilot channel (PCPICH) in the region

3. The mobile notifies the base station of the received power value of the PCPICH to the uplink communication channel (RACH).

4. The base station estimates the propagation loss in the base station-moving period from the difference between the transmission power value of the PCPICH and the reception power value (paragraph 2) notified from the mobile station in paragraph 1

5. The base station calculates the initial transmission power value from the calculated propagation loss.

The conventional initial transmission power calculation method as described above is performed based on the precondition that the propagation loss in the downward direction (mobile station to base station) and the propagation loss in the upward direction (mobile to base station) can be regarded as the same. However, in the radio link via the repeater device, the gain in the downward direction and the upward direction in the repeater is not necessarily the same, and there is a possibility that proper transmission power value determination cannot be made.

In the above-described mobile communication network system having a repeater, checking whether the mobile device is located in the service area of the repeater becomes important for improving the accuracy in both position information detection and transmission power value determination.

As a technique for detecting the position state of a mobile device in a mobile communication network system, there is an invention disclosed in Japanese Patent Laid-Open No. 2000-69538.

The invention disclosed in Japanese Unexamined Patent Publication No. 2000-69538 is for the purpose of providing an apparatus capable of grasping the position information of a mobile terminal by each communication network even between communication networks having a database having a different structure. Next, a communication network receiving a notification of a terminal identification code from a mobile terminal distributes its identification code and terminal identification code as notification information to other communication networks, and each communication network receives notification information including a terminal identification code managed by the communication terminal. In this case, there is disclosed a configuration for inputting identification information of a communication network to which notification information has been transmitted in correspondence with a terminal identification code in its own database.

  As described above, in the mobile communication network system provided with the repeater, whether the positioner is located in the service area of the repeater is important for increasing the degree in both position information detection and transmission power value determination. As a technique for detecting a position state of a mobile device in a mobile communication network system, there is an invention disclosed in Patent Literature 2, but the present invention recognizes which mobile terminal is located in a plurality of communication networks. It does not confirm whether it is located. In addition, there is a problem that the system configuration is large in order to distribute the notification information to a plurality of communication networks, and the cost is high.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems with the prior art as described above, and it is possible to confirm whether the mobile device is located in the service area of the repeater with a simple system, and improve the accuracy of position information detection and transmission power value determination. It is an object of the present invention to realize a service area position determining method and system in a mobile communication network.

In the mobile communication network of the present invention, a service area position determining method includes a mobile station, a wireless base station apparatus for performing communication with the mobile station and a radio signal, and a wireless signal amplification in both directions between the wireless base station apparatus and the mobile unit. In a service area position determination method performed in a mobile communication network having a wireless repeater to perform,

In the radio repeater, assigning an identification code for identifying that the radio signal from the radio base station to the mobile station is a service area by the self;

In the wireless base station, comprising the notification information relating to the identification signal of the radio signal directed to the mobile unit;

In the mobile device, when the identification code is used as the notification information, it is checked whether the mobile station is located in the service area by the wireless repeater, and when it is confirmed that the mobile station is located in the service area by the wireless repeater, And transmitting a signal representing a meaning to the radio base station apparatus.

 The service area position determination system in the mobile communication network according to the present invention is a mobile base station, a wireless base station apparatus for performing communication with the mobile station and a radio signal, and wireless communication amplification in both directions between the wireless base station apparatus and the mobile unit. A service area position determination system performed in a mobile communication network having a wireless repeater to perform,

The radio repeater gives an identification code for identifying that the radio signal from the radio base station to the mobile station is a service area by the self,

The wireless base station is assumed to include notification information relating to the identification signal of the radio signal directed to the mobile device.

The mobile station uses the identification code and the notification information to check whether the mobile station is located in the service area by the wireless repeater, and the mobile station has the meaning when the mobile station is located in the service area by the wireless repeater. And a signal indicating to the wireless base station apparatus.

In either case, the identification code is spread with a code orthogonal to other radio channels of the radio repeater,

The notification information is composed of spreading code information of the identification code and limit value information indicating a limit value.

The mobile unit zero spreads the identification code using the spreading code information, compares the result with the limit value indicated by the limit value information, and when the value obtained as the result of despreading is larger than the limit value, It may be located in the service area.

According to the area determination method of the present invention, by transmitting an identification code from the radio repeater and transmitting the notification information, it is possible to detect whether the mobile station is located in the service area constituted by the radio repeater. Then, the radio base station apparatus is informed from the mobile station whether it is located in the service area constituted by the radio repeater, so that the propagation delay can be corrected in addition to the control delay of the repeater already known in advance. Further, it is possible to correct the propagation loss value and determine an appropriate transmission power value based on radio gain information that is already known in advance or is reported to the base station from the repeater.

In addition, since the identification code is transmitted from the radio repeater, the radio base station apparatus transmits the notification information, and the mobile station confirms whether it is located in the area from the identification code and the notification information and informs the radio base station apparatus. This large scale never happens.

1 is a diagram showing the configuration of an embodiment of a CDMA mobile communication system using a repeater according to the present invention.

Fig. 2 is a diagram showing signal transmission when performing the area determination method according to the present invention.

3A is a diagram showing the configuration of a radio signal transmitted by the Node B 13, and (b) is a diagram showing the configuration of a radio signal transmitted by the repeater 14. FIG.

4 is a diagram illustrating a configuration of the notification information 22.

5 is a flowchart showing the operation of the Node B 13 and the mobile unit 15 when performing the area determination according to the present invention.

6 is a diagram showing the configuration of a second embodiment of the present invention.

Fig. 7 is a diagram showing the configuration of notification information 622, 622 '.

* Explanation of symbols for main parts of drawings *

11 Mobile switching network 12 wireless base station controller

13 Wireless Base Station Unit 14 Wireless Repeater

15 Mobile 16,17 Service Area

Next, an embodiment of the present invention will be described with reference to the drawings.

1 is a diagram showing the configuration of an embodiment of a CDMA mobile communication system using a repeater according to the present invention.

In the present embodiment, a wireless base station device (hereinafter referred to as CN) 11, a radio base station controller (hereinafter referred to as RNC) 12, and a radio base station apparatus (hereinafter referred to as RNC 12) are affiliated. (Abbreviated as NodeB) 13, a radio repeater (hereinafter, abbreviated as repeater) disposed in the service area 16 configured by NodeB 13 to receive, amplify, and transmit a bidirectional radio signal of a base station-mobile ( 14) and mobile unit 15 existing in service area 17 by repeater 14. As shown in FIG.

The mobile unit 15 communicates via the receiving antenna 16 and the transmitting antenna 18 provided in the repeater 14, and the CN 11 via the repeater 14, the NodeB 13, and the RNC 12. Access to the public network.

Fig. 2 is a diagram showing signal transmission when performing the area determination method according to the present invention. Here, the repeater 14 assigns a repeater identification code 21 for identifying its own service area to the radio signal in the downward (base station to mobile) direction, and transmits the radio signal to the service area 17. .

FIG. 2A is a diagram showing the configuration of a radio signal transmitted by the Node B 13, and FIG. 3B is a diagram showing the configuration of a radio signal transmitted by the repeater 14. FIG. As shown in FIG. 3 (a), the radio signal transmitted by the Node B 13 is composed of an identification channel and a common channel. As shown in FIG. 3 (b), the radio signal transmitted by the repeater 14 is a separate channel. In addition to the and common channels, a repeater identification code 21 is provided. A repeater identification code 21 serving as notification information common to the service area 16 and the service area 17 by the repeater is provided. The repeater identification code 21 is, for example, a second pilot channel (SCPICH) in a W-CDMA mobile communication system, and is spread with a spreading code orthogonal to other radio channels (common channel, individual channel).

On the other hand, the common channel of the radio signal transmitted by the Node B 13 includes notification information 22 (see FIG. 2) common to the service area 17 by the service area 16 and the repeater 14. have. 4 is a diagram showing the configuration of the notification information 22. As shown in FIG. 4, the notification information 22 is the repeater identification code information 41 and the repeater area position detection which are information about the repeater identification code 21. As shown in FIG. Threshold 42 is included.

5 is a flowchart showing the operation of the Node B 13 and the mobile unit 15 when performing the area determination according to the present invention.

The mobile unit 15 detects whether it is located under the service area by the repeater in the order shown in FIG. First, the mobile unit 15 acquires the notification information 22 transmitted from the base station. As shown in Fig. 4, the notification information 22 includes the repeater region position detection limit value 42 and the repeater identification code information 41 as information about the repeater identification code 21, and acquires them (step). S401). The content of the repeater identification code information 41 is, for example, spread code information of the repeater identification code 21.

Next, the mobile unit 15 despreads the received radio signal based on the repeater identification code information 41 acquired from the notification information (step S402). Since the repeater identification code 21 is spread with a code orthogonal to other radio channels, a high cross correlation is obtained in the service area 17 by the repeater 14. On the other hand, cross correlation is low outside the service area 17 by the repeater 14, that is, within the service area 16 by the Node B 13. The mobile unit 15 compares the repeater region position detection threshold 42 notified by the notification information 22 acquired in step S401 with the cross-correlation value obtained in step S402 (step S403), and confirms the magnitude of the repeater. It is determined whether or not it is located in the service area 17 by (14) (step S404).

When the mobile unit 15 determines in step S404 that the cross-correlation value is larger than the repeater region position detection threshold 42, the mobile unit 15 outputs a control signal indicating that it is located in the service region 17 by the repeater 14. If the B 13 is notified and it is confirmed that the cross-correlation value is not larger than the repeater region position detection threshold 42, it is assumed that the magnetic field is not located in the service region 17 by the repeater 14 (step). S405).

In the present embodiment configured as described above, in the CDMA mobile communication system via the repeater, it is possible to detect whether the mobile unit 15 is located in the service area 17 by the repeater 14.

Then, the RNC 12 can correct the control delay by the repeater 14 by applying the detection result to the positional information detection service, thereby moving the mobile unit 15 to the service area 17 by the repeater 14. Even if) is located, it is possible to provide an accurate location information service.

In addition, the RNC 12 applies the detection result to the transmission power control of the radio channel, so that even when the vertical amplification gain of the repeater 14 is different, it is possible to apply appropriate correction, and thus the accurate transmission power. It becomes possible to carry out control.

6 is a diagram showing the configuration of a second embodiment of the present invention.

This embodiment is an application example in which a plurality of repeaters is arranged in a radio area constituted by one Node B, and a service area by a plurality of repeaters exists.

In FIG. 7, two repeaters 614 and 614 'and a service area (in addition to the service area 16 constituted by the CN 11, RNC 12, NodeB 13, and NodeB 13 shown in FIG. 617 and 617 '), mobile devices 615 and 615' located in service areas 617 and 617 ', receive antennas 616 and 616' provided in repeaters 614 and 614 ', and transmit antennas 618 and 818. Repeater identification codes 621 and 621 and notification information 622 and 622 'are shown.

The repeater identification codes 621 and 621 'are assigned by the repeaters 614 and 614' to identify their service area, and the contents thereof are different. The notification information 622 and 622 'are the same. FIG. 7 is a diagram showing the configuration of notification information 622, 622 '. As shown in FIG. 7, notification information 622, 622' includes repeater identification code information which is information for repeaters 614, 614 '; Repeater region position detection thresholds are included, respectively, and the mobile units 615 and 615 'confirm whether they are located in the service regions 617 and 617' of the repeaters 614 and 614 'according to the procedure shown in FIG. The RNC 12 can determine whether each mobile station 615, 615 'is located in the service area 617, 617' of the repeaters 614, 614 'by the control signal from each mobile station.

Claims (4)

A service area position determination method performed in a mobile communication network including a mobile station, a wireless base station device for communicating with the mobile station by radio signals, and a wireless repeater for amplifying bidirectional radio signals between the wireless base station device and the mobile station. , In the radio repeater, assigning an identification code for identifying that the radio signal from the radio base station to the mobile station is a service area by the self; In the wireless base station, comprising the notification information on the identification signal of the radio signal directed to the mobile unit, and In the mobile device, the identification code and the notification information are used to confirm whether the mobile station is located in the service area by the wireless repeater, and to confirm that the mobile station is located in the service area by the wireless repeater. And transmitting a signal indicating to the radio base station apparatus. The method of claim 1, The identification code is spread with a code orthogonal to other wireless channels of the wireless repeater, The notification information is composed of spreading code information of the identification code and threshold information indicating a threshold value. The mobile station despreads the identification code using the spreading code information, compares the result with a limit value indicated by the limit information, and when the value obtained as the result of despreading is larger than the limit value, A service area position determination method in a mobile communication network said to be located in a service area. A service area position determination system performed in a mobile communication network including a mobile unit, a wireless base station apparatus for communicating with the mobile unit by radio signals, and a wireless repeater for amplifying bidirectional radio signals between the wireless base station apparatus and the mobile unit. to, The radio repeater assigns an identification code for identifying that the radio signal from the radio base station to the mobile device is a service area by its own. The wireless base station is assumed to include notification information relating to the identification signal of the radio signal directed to the mobile device. The mobile station uses the identification code and the notification information to check whether the mobile station is located in the service area by the wireless repeater, and when the mobile station confirms that the mobile station is located in the service area by the wireless repeater. A service area position determination system in a mobile communication network, characterized by transmitting a signal indicating to the radio base station apparatus. The method of claim 3, The identification code is spread with a code orthogonal to other radio channels of the wireless repeater, The notification information is composed of spreading code information of the identification code and limit value information indicating a limit value. The mobile station despreads the identification code using the spreading code information, compares the result with a limit value indicated by the limit information, and when the value obtained as the result of despreading is larger than the limit value, A service area position determination system in a mobile communication network said to be located in a service area.

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