JP2000102065A - Radio communication base station unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication base station unit capable of accommodating many users without increasing a hand-over frequency. SOLUTION: A communication kind judgement means 51b monitors control data sent through a communication link opened between a mobile station by a communication link opening control means 51a and judges the kind (voice communication and packet communication) of communication to be performed by the mobile station. Based on the judged result, at the time of transmission from the mobile station, the reception of response signals to call termination and packet communication for which the using time of a radio part is short, a radio part changeover control means 51c performs changeover control so as to use the narrow beam radio parts 11-1n. On the other hand, for the voice communication for which the using time of the radio part is long on average, the changeover control is performed so as to use the wide beam radio parts 21-23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication base station device used for a mobile communication system such as a mobile phone system.

[0002]

2. Description of the Related Art As is well known, a radio communication base station apparatus BS of a conventional large-zone mobile communication system differs from each other for each of three equally divided radio zones as shown in FIG. Each of the frequency bands f1 to f3 is allocated, and communication with the mobile station PS in each wireless zone is performed through the allocated frequency band.

However, in the large zone method as described above, since the radio zone is relatively wide, the frequency of handovers between the radio zones is low, but the frequency utilization efficiency is low. It was difficult to cope with the increase in the number of users.

In order to cope with such a problem, a small zone type mobile communication system represented by a PHS (Personal Handy-phone System) has been developed. In this small zone system, as shown in FIG. 11, a communication area is expanded by using a large number of wireless communication base station devices CS having a small transmission output, and each wireless communication base station device CS uses a common frequency band. Like that.

However, in such a small zone system, since each radio communication base station apparatus CS can use a common frequency band as described above, the efficiency of use of the frequency per unit area is high and many users can be used. Although it can be accommodated, since the wireless zone of each wireless communication base station device CS is small,
There has been a problem that the frequency of handovers is high, and a control station that controls the system needs an excessive processing capacity.

[0006] The above-mentioned problems of the large zone system and the small zone system are caused by FDMA (Frequency Division).
Multiple Access (TDMA) and Time Division Mu
ltiple Access) system, as well as CDMA (Code Div
A similar problem arises when the ision multiple access method is employed.

[0007]

Conventionally, when a large zone system is adopted, the efficiency of use of radio resources such as frequencies and spreading codes is low, and the number of users that can be accommodated is small. Has a high frequency of occurrence and requires an excessive processing capacity.

[0008] The present invention has been made to solve the above problem, and has as its object to provide a radio communication base station apparatus capable of accommodating a large number of users without increasing the frequency of handover. Another object of the present invention is to provide a wireless communication base station apparatus capable of suppressing the influence of multipath caused by a reflector or the like.

[0009]

To achieve the above object, a wireless communication base station apparatus according to the present invention comprises a wireless communication base station for connecting a communication device connected via a wireless line to a wired communication network. In the device, a plurality of first communication means for forming a first beam in a space and communicating with a communication device via a wireless line, and a first beam formed by the plurality of first communication means. The second beam having a wider beam width is formed so as to include the first beam, and is provided with a communication device and second communication means for performing communication via a wireless line.

[0010] The radio communication base station apparatus having the above configuration is provided with two types of communication means for forming beams of different widths, and forms a radio zone by superimposing two types of beams.
Therefore, according to the wireless communication base station apparatus having the above configuration,
Communicating with the communication device through the first communication means forming the narrower beam can accommodate a large number of users and communicate with the communication device through the second communication means forming the wider beam. By doing so, it is possible to suppress an increase in handover frequency.

Further, in the present invention, the first communication means performs intermittent communication with the communication device, and the second communication means continuously performs communication with the communication device. Is performed.

Therefore, according to the present invention, intermittent communication which is less susceptible to handover is performed by the first communication means having a narrow beam width, and communication is continuously performed which is susceptible to handover. Is performed by the second communication means having a wide beam width, so that a large number of users can be accommodated without increasing the frequency of handover.

Further, in the wireless communication base station apparatus according to the present invention, a communication type determining means for determining a type of communication performed with a communication apparatus connected via a wireless line;
Switching control means for selecting one of the first communication means and the second communication means and communicating with the communication device in accordance with a result of the judgment by the communication type judgment means. .

Therefore, according to the present invention, since communication is performed by selectively using communication means having different beam widths according to the type of communication, for example, one communication time is short and is not easily affected by handover. Intermittent communication such as a control signal relating to outgoing / incoming calls and packet data communication is performed by the first communication means having a small beam width, and is continuously affected by handover, such as voice communication, which is susceptible to handover. By performing the communication to be performed by the second communication means having a wide beam width, a large number of users can be accommodated without increasing the handover frequency.

Still further, according to the present invention, a moving speed judging means for judging whether or not a moving speed of a communication device connected via a radio line is high, Switching control means for selecting one of the first communication means and the second communication means and communicating with the communication device is provided.

Therefore, according to the present invention, communication is performed by selectively using communication means having different beam widths depending on whether or not the moving speed of the communication device is high. Communication with a communication device that does not move at high speed is performed by the first communication means having a narrow beam width, and communication with a communication device which is susceptible to handover and having a wide beam width is used for communication with a communication device moving at high speed. By doing so, a large number of users can be accommodated without increasing the frequency of handover.

Further, according to the present invention, a communication quality judging means for judging the communication quality from a signal received from the communication device, and the first communication means and the second communication means according to the judgment result of the communication quality judging means. Switching control means for selecting one of the communication means and communicating with the communication device is provided.

Therefore, according to the present invention, communication is performed by selectively using communication means having different beam widths in accordance with the quality of communication with the communication apparatus. By using the first communication means having a narrow beam width, it is possible to suppress multipath caused by a reflector or the like.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a wireless communication base station apparatus BS1 according to the first embodiment of the present invention. Radio communication base station apparatus B shown in FIG.
S1 is a narrow beam radio section 11-1n, a wide beam radio section 2
1 to 23, a signal processing unit 3, a signal processing unit 4, and a control unit 51.

Narrow beam radio units 11 to 1n (where n is 4
Are the antennas 101 to 10n and the wireless circuits 111 to 1m1, 112 to 1m2,.
And, as shown in FIG.
Beams are formed in regions ZS1 to ZSn having an angle of [゜]. FIG. 2 shows an example in which the “n” is 18.

The radio circuits 111 to 1m1 and 112 to 1m
1m2,... 11n to 1mn perform communication according to the spread spectrum method.
Communication using the spread spectrum signal is performed between the mobile stations PS1 to PSj in S1 to ZSn.

That is, the spread spectrum signals from the mobile stations PS1 to PSj are transmitted to the radio circuits 111 to 1m1, 11
2 ~ 1m2, ... 11n ~ 1mn rake
After being received and subjected to decoding processing and the like using the spreading code, it is input to a signal processing unit 3 described later.

On the other hand, the signal processing section 3 sends the radio circuits 111 to
The signals input to 1m1, 112 to 1m2,... 11n to 1mn are subjected to an encoding process or the like using the above-mentioned spread code, and the resulting spread spectrum signal is converted into a radio frequency signal. Are transmitted to the corresponding mobile stations PS1 to PSj in the corresponding areas ZS1 to ZSn.

The wide beam radio units 21 to 23 are respectively provided with antennas 201, 202 and 203 and radio circuits 211 to 2
k1, 212-2k2, 213-2k3, and FIG.
As shown in (1), beams are formed in regions ZL1 to ZL3 each having an angle of about 120 [゜].

The radio circuits 211 to 2k1, 212 to
2k2, 213 to 2k3 perform communication by the spread spectrum method, and different spreading code groups are allocated among them, and any one of the spreading codes is selectively used to perform the communication in the above-mentioned areas ZL1 to ZL3. Mobile station P
Communication using a spread spectrum signal is performed between S1 and PSj.

That is, the spread spectrum signals from the mobile stations PS1 to PSj are transmitted to the radio circuits 211 to 2k1, 21
Rake at 2-2k2, 213-2k3
After being received and subjected to decoding processing using the spreading code and the like, it is input to a signal processing unit 4 described later.

On the other hand, the signal processing section 4 sends the radio circuits 211 to 211 to each other.
Signals input to 2k1, 212 to 2k2, and 213 to 2k3 are subjected to an encoding process or the like using the above-mentioned spread code, and the resulting spread spectrum signal is
The signals are converted into radio frequency signals and transmitted to the corresponding mobile stations PS1 to PSj in the corresponding areas ZL1 to ZL3.

The signal processing unit 3 includes radio circuits 111 to 1m
Among the data decoded at 1,112 to 1m2,..., 11n to 1mn, packet data is transmitted to a communication partner through a packet network, and control data is output to a control unit 51 described later.

When packet data is input from a communication partner through a packet network, the signal processing unit 3
This packet data is transmitted to the destination mobile stations PS1 to PS
wireless circuit 1 corresponding to areas ZS1 to ZSn where j is located
11-11m1, 112-1m2,... 11n-1mn.

The signal processing unit 4 includes radio circuits 211 to 2k
Of the data decoded in 1, 212 to 2k2 and 213 to 2k3, voice communication data is transmitted to a communication partner through a public network, and control data is output to a control unit 51 described later.

When voice communication data is input from a communication partner through a public network, the signal processing unit 4 transfers the voice communication data to areas ZL1 to ZL3 where mobile stations PS1 to PSj as destinations are located. Corresponding wireless line 211
To 2k1, 212 to 2k2, and 213 to 2k3.

The control unit 51 controls the radio communication base station apparatus B
It controls each part of S1 and controls the wireless circuit 111
.. 11n to 1mn and wireless circuits 211 to 2k, 212 to 2k2, 213 to 2k
3 and the wide beam radio units 21 to
Control related to handover of communication using the H.23, control related to handover with another wireless communication base station device, and the like are performed.

The control section 51 includes a communication link opening control section 51a, a communication type determination section 51b, and a radio section switching control section 51c. The communication link establishment control means 51a accepts a communication start request (transmission) and an incoming response from the mobile stations PS1 to PSj through the narrow beam radio units 11 to 1n, and establishes a communication link with the mobile stations PS1 to PSj. It is to be established.

The communication type judging means 51b monitors control data sent from the mobile stations PS1 to PSj through the communication link established by the communication link establishment control means 51a, and when the mobile stations PS1 to PSj try to execute the data. The type of communication (voice communication, packet communication) to be performed is determined.

The radio section switching control means 51c is set up between the mobile stations PS1 to PSj in accordance with the type of communication determined by the communication type determining means 51b and whether or not there is an incoming call from the public network. Communication links to the narrow beam radio units 11 to 1
n (at the time of packet communication) or switching through the wide beam radio units 21 to 23 (at the time of voice communication and at the time of incoming call from the public network).

The mobile stations PS1 to PSj from the public network side
(Call), a control station (not shown) that controls a number of wireless communication base station devices of the communication system transmits the mobile station PS1 through the wide beam radio units 21 to 23.
... PSj are periodically monitored, and based on the monitoring result, the above call is performed through each wireless communication base station apparatus.

Next, the operation of the radio communication base station apparatus BS1 having the above configuration will be described below with reference to FIGS. First, the operation when the mobile station PS1 shown in FIG. 2 makes a call for performing voice communication will be described.

As shown in FIG. 3, when the mobile station PS1 makes an outgoing call for voice communication (call), the communication link establishment control means 51a transmits the call to a narrow area corresponding to the area ZS1 where the mobile station PS1 is located. The communication is accepted through the beam radio unit 11 and a communication link is established with the mobile station PS1.

Next, the data indicating the communication type included in the control data sent from the mobile station PS1 is monitored by the communication type determining means 51b, and it is detected that the communication to be performed is voice communication.

Then, as shown in FIG. 3, the radio section switching control means 51c establishes communication with the mobile station PS1 in the area Z.
Wide beam radio unit 2 corresponding to area ZL1 including S1
The switching control is performed so as to perform the operation by using 1.

Next, the operation when the mobile station PS2 shown in FIG. 2 makes a call for performing packet communication will be described. As shown in FIG. 3, when the mobile station PS2 makes a call for performing packet communication, the communication link establishment control means 51a transmits the call to the area Z where the mobile station PS2 is located.
Accepted through the narrow beam radio unit 12 corresponding to S2,
A communication link is established with the mobile station PS2.

Next, the data indicating the communication type included in the control data sent from the mobile station PS2 is monitored by the communication type determining means 51b, and it is detected that the communication to be performed is packet communication.

Then, since the communication to be performed is packet communication, the radio section switching control means 51c
As shown in (1), control is performed so that communication with the mobile station PS2 is performed using the narrow beam radio unit 12, as in the case of establishing a communication link.

Next, the operation of the mobile station PS3 shown in FIG. 2 when an incoming call from the public network occurs will be described. When an incoming call to the mobile station PS3 occurs, as shown in FIG. 3, a control station (not shown) calls the mobile station PS3 through the wide beam radio unit 21 corresponding to the area ZL1 where the mobile station PS3 is located.

When the mobile station PS3 responds to this call by transmitting a response signal, the narrow beam radio unit 13 corresponding to the area ZS3 where the mobile station PS3 is located receives the response signal, and the communication link The establishment control means 51a establishes a communication link with the mobile station PS3.

Then, as shown in FIG. 3, the radio section switching control means 51c establishes communication with the mobile station PS3 in the area Z.
Wide beam radio section 2 corresponding to area ZL1 including S3
The switching control is performed so as to perform the operation by using 1.

As described above, in the radio communication base station apparatus BS1 having the above-described configuration, the mobile station PS which uses the radio unit for a short time is used.
1 to PSj, reception of a response signal to an incoming call, and packet communication are performed through the narrow beam radio units 11 to 1n. Radio units 21 to 23
Through the process.

That is, communication that requires a short communication time and does not require a handover is performed through the narrow beam radio units 11 to 1n that can accommodate a large number of users. , Through the wide beam radio units 21 to 23.

Therefore, according to the radio communication base station apparatus BS1 having the above configuration, a large number of users can be accommodated without increasing the handover frequency by switching the radio section used according to the communication type as described above. It becomes possible.

FIG. 4 shows a configuration of a radio communication base station apparatus BS2 according to the second embodiment of the present invention.
The radio communication base station apparatus BS2 shown in FIG. 1 includes narrow beam radio sections 11 to 1n, wide beam radio sections 21 to 23, and a control section 5.
2, a signal processing unit 6 is provided.

Narrow beam radio units 11 to 1n (where n is 4
Are the antennas 101 to 10n and the wireless circuits 111 to 1m1, 112 to 1m2,.
, And as shown in FIG.
Beams are formed in regions ZS1 to ZSn having an angle of [゜]. Note that FIG. 5 shows an example in which the “n” is 18.

The radio circuits 111 to 1m1, 112 to
1m2,... 11n to 1mn perform communication according to the spread spectrum method.
Communication using the spread spectrum signal is performed between the mobile stations PS1 to PSj in S1 to ZSn.

That is, the spread spectrum signals from the mobile stations PS1 to PSj are transmitted to the radio circuits 111 to 1m1, 11
2 ~ 1m2, ... 11n ~ 1mn rake
After being received and subjected to decoding processing and the like using the spreading code, it is input to a signal processing unit 6 described later.

On the other hand, the radio circuits 111 to
The signals input to 1m1, 112 to 1m2,... 11n to 1mn are subjected to an encoding process or the like using the above-mentioned spread code, and the resulting spread spectrum signal is converted into a radio frequency signal. Are transmitted to the corresponding mobile stations PS1 to PSj in the corresponding areas ZS1 to ZSn.

The wide beam radio units 21 to 23 include antennas 201, 202, and 203, and radio circuits 211 to 2 respectively.
k1, 212-2k2, 213-2k3, and FIG.
As shown in (1), beams are formed in regions ZL1 to ZL3 each having an angle of about 120 [゜].

The radio circuits 211 to 2k1, 212 to
2k2, 213 to 2k3 perform communication by the spread spectrum method, and different spreading code groups are allocated among them, and any one of the spreading codes is selectively used to perform the communication in the above-mentioned areas ZL1 to ZL3. Mobile station P
Communication using a spread spectrum signal is performed between S1 and PSj.

That is, the spread spectrum signals from the mobile stations PS1 to PSj are transmitted to the radio circuits 211 to 2k1, 21
Rake at 2-2k2, 213-2k3
After being received and subjected to decoding processing and the like using the spreading code, it is input to a signal processing unit 6 described later.

On the other hand, the radio circuits 211 to
Signals input to 2k1, 212 to 2k2, and 213 to 2k3 are subjected to an encoding process or the like using the above-mentioned spread code, and the resulting spread spectrum signal is
The signals are converted into radio frequency signals and transmitted to the corresponding mobile stations PS1 to PSj in the corresponding areas ZL1 to ZL3.

The signal processing section 6 includes radio circuits 111 to 1m
, 11n to 1mn, packet data is transmitted to a communication partner through a packet network, voice communication data is transmitted to a communication partner through a public network, and control data is transmitted. Is output to the control unit 52 described later.

Under the control of the control unit 52, the signal processing unit 6 converts the packet data input from the communication partner through the packet network and the voice communication data input from the communication partner through the public network into the packet data and voice data. Wireless circuits 111 to 1m1 and 112 corresponding to areas where mobile stations PS1 to PSj, which are destinations of communication data, are located
11m to 1m2 and wireless circuits 211 to 2
k1, 212 to 2k2, and 213 to 2k3.

The control unit 52 controls the radio communication base station apparatus B
S2 is a unit that controls each unit.
.. 11n to 1mn and wireless circuits 211 to 2k, 212 to 2k2, 213 to 2k
3 and the wide beam radio units 21 to
Control related to handover of communication using the H.23, control related to handover with another wireless communication base station device, and the like are performed.

The control section 52 includes a communication link opening control section 52a, a moving speed determination section 52b, and a radio section switching control section 52c. The communication link establishment control means 52a accepts a communication start request (transmission) and an incoming response from the mobile stations PS1 to PSj through the narrow beam radio units 11 to 1n or the wide beam radio units 21 to 23, and receives the mobile stations PS1 to PSj. A communication link is established with PSj.

The moving speed judging means 52b monitors control data sent from the mobile stations PS1 to PSj through the communication link established by the communication link opening control means 52a, and identifies the mobile station identification information included in the data. Mobile station PS1 to PS
It is for estimating the moving speed of j (slow moving or high moving).

The radio section switching control means 52c establishes a communication link established between the mobile stations PS1 to PSj in accordance with the moving speed estimated by the moving speed determining means 52b.
Through narrow beam radio units 11-1n (when moving at low speed)
Alternatively, control is performed to switch to one through the wide beam radio units 21 to 23 (during high-speed movement).

Next, with reference to FIGS. 5 and 6, the operation of the radio communication base station apparatus BS2 having the above configuration will be described below. First, the operation when the mobile station PS1 shown in FIG. 5 makes a call will be described.

As shown in FIG. 5, when the mobile station PS1 makes a call, the communication link establishment control means 52a accepts the call through the narrow beam radio unit 11 corresponding to the area ZS1 where the mobile station PS1 is located. Establish a communication link with PS1.

Then, the moving speed judging means 52b
By monitoring the identification information of the mobile station PS1 included in the control data sent from the mobile station PS1, it is detected that the mobile station PS1 is a portable mobile device.

Then, as shown in FIG. 6, the radio section switching control means 52c controls communication with the mobile station PS1 using the narrow beam radio section 11 as in the case of establishing a communication link. I do.

Next, the operation when the mobile station PS2, which is an on-vehicle mobile device, performs communication will be described. As shown in FIG. 5, when the mobile station PS2 makes a call, the communication link opening control means 52a accepts the call through the narrow beam radio unit 12 corresponding to the area ZS2 where the mobile station PS2 is located, and communicates with the mobile station PS2. Establish a communication link between them.

Next, the moving speed judging means 52b
By monitoring the identification information of the mobile station PS2 included in the control data sent from the mobile station PS2, it is detected that the mobile station PS2 is an in-vehicle mobile device.

Then, as shown in FIG. 6, the radio section switching control means 52c performs communication with the mobile station PS2 in the area Z.
Wide beam radio section 2 corresponding to area ZL1 including S2
The switching control is performed so as to perform the operation by using 1.

Next, a description will be given of an operation when an incoming call occurs from the public network to the mobile station PS3.
As shown in FIG. 6, when an incoming call to the mobile station PS3 occurs, a control station (not shown) calls the mobile station PS3 through the wide beam radio unit 21 corresponding to the area ZL1 where the mobile station PS3 is located.

When the mobile station PS3 responds to this call by transmitting a response signal, the narrow beam radio unit 13 corresponding to the area ZS3 where the mobile station PS3 is located receives the response signal, and the communication link The establishment control means 52a establishes a communication link with the mobile station PS3.

Then, the moving speed judging means 52b
By monitoring the identification information of the mobile station PS3 contained in the control data sent from the mobile station PS3, it is detected that the mobile station PS3 is a portable mobile device.

Then, as shown in FIG. 6, the radio section switching control means 52c controls the communication with the mobile station PS3 using the narrow beam radio section 13 in the same manner as when the communication link is opened. I do.

Next, the mobile station P, which is an in-vehicle mobile device,
The operation when a call is received from the public network with respect to S4 will be described. As shown in FIG. 6, when an incoming call to the mobile station PS4 occurs, the control station (not shown)
Wide beam radio section 2 corresponding to area ZL1 where S4 is located
1 to the mobile station PS4.

When the mobile station PS4 responds to this call by transmitting a response signal, the narrow beam radio unit 14 corresponding to the area ZS4 where the mobile station PS4 is located receives the response signal and transmits a communication link. The establishment control means 52a establishes a communication link with the mobile station PS4.

Next, the moving speed judging means 52b
By monitoring the identification information of the mobile station PS4 included in the control data sent from the mobile station PS4, it is detected that the mobile station PS4 is an on-vehicle mobile device.

Then, as shown in FIG. 6, the radio section switching control means 52c establishes communication with the mobile station PS4 in the area Z.
Wide beam radio section 2 corresponding to area ZL1 including S4
The switching control is performed so as to perform the operation by using 1.

As described above, in the radio communication base station apparatus BS2 having the above configuration, when communicating with a portable mobile device having a low moving speed, the communication is performed through the narrow beam radio sections 11 to 1n, and the communication with the on-vehicle mobile device having a high moving speed is performed. At the time of communication, the communication is performed through the wide beam radio units 21 to 23.

That is, communication with a portable mobile device having a low moving speed and in which handover does not frequently occur is carried out through the narrow beam radio sections 11 to 1n capable of accommodating a large number of users, and the moving speed is high and handover frequently occurs. Communication with the in-vehicle mobile device which is highly likely to be performed is performed through the wide beam radio units 21 to 23.

Therefore, according to the radio communication base station apparatus BS2 having the above-described configuration, a large number of users can be accommodated without increasing the handover frequency by switching the radio section used according to the moving speed as described above. It becomes possible.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the estimation of the moving speed of the mobile stations PS1 to PSj is performed based on the identification information of the mobile stations PS1 to PSj included in the control data. ~ PS
j may be estimated from the fading pitch of the received signal from j, or may be based on a notification operation of the moving speed from the user of the mobile stations PS1 to PSj. Alternatively, the frequency of handovers of the mobile stations PS1 to PSj may be monitored, and the moving speed may be estimated based on the monitoring result.

FIG. 7 shows a configuration of a radio communication base station apparatus BS3 according to the third embodiment of the present invention.
The wireless communication base station apparatus BS3 shown in this figure includes narrow beam radio sections 11 to 1n, wide beam radio sections 21 to 23, and a control section 5.
3. A signal processing unit 6 is provided.

Narrow beam radio units 11 to 1n (where n is 4
Are the antennas 101 to 10n and the wireless circuits 111 to 1m1, 112 to 1m2,.
And as shown in FIG.
Beams are formed in regions ZS1 to ZSn having an angle of [゜]. FIG. 8 shows an example in which the above “n” is 18.

The radio circuits 111 to 1m1 and 112 to
1m2,... 11n to 1mn perform communication according to the spread spectrum method.
Communication using the spread spectrum signal is performed between the mobile stations PS1 to PSj in S1 to ZSn.

That is, the spread spectrum signals from the mobile stations PS1 to PSj are transmitted to the radio circuits 111 to 1m1, 11
2 ~ 1m2, ... 11n ~ 1mn rake
After being received and subjected to decoding processing and the like using the spreading code, it is input to a signal processing unit 6 described later.

On the other hand, the radio circuits 111 to
The signals input to 1m1, 112 to 1m2,... 11n to 1mn are subjected to an encoding process or the like using the above-mentioned spread code, and the resulting spread spectrum signal is converted into a radio frequency signal. Are transmitted to the corresponding mobile stations PS1 to PSj in the corresponding areas ZS1 to ZSn.

The wide beam radio units 21 to 23 are respectively provided with antennas 201, 202 and 203 and radio circuits 211 to 2
k1, 212-2k2, 213-2k3, and FIG.
As shown in (1), beams are formed in regions ZL1 to ZL3 each having an angle of about 120 [゜].

The radio circuits 211 to 2k1, 212 to
2k2, 213 to 2k3 perform communication by the spread spectrum method, and different spreading code groups are allocated among them, and any one of the spreading codes is selectively used to perform the communication in the above-mentioned areas ZL1 to ZL3. Mobile station P
Communication using a spread spectrum signal is performed between S1 and PSj.

That is, the spread spectrum signals from the mobile stations PS1 to PSj are transmitted to the radio circuits 211 to 2k1, 21
Rake at 2-2k2, 213-2k3
After being received and subjected to decoding processing and the like using the spreading code, it is input to a signal processing unit 6 described later.

On the other hand, the radio circuits 211 to 211
Signals input to 2k1, 212 to 2k2, and 213 to 2k3 are subjected to an encoding process or the like using the above-mentioned spread code, and the resulting spread spectrum signal is
The signals are converted into radio frequency signals and transmitted to the corresponding mobile stations PS1 to PSj in the corresponding areas ZL1 to ZL3.

The signal processing section 6 includes radio circuits 111 to 1m
, 11n to 1mn, packet data is transmitted to a communication partner through a packet network, voice communication data is transmitted to a communication partner through a public network, and control data is transmitted. Is output to the control unit 53 described later.

The signal processing unit 6, under the control of the control unit 53, converts packet data input from a communication partner through a packet network and voice communication data input from a communication partner through a public network into the packet data and voice data. Wireless circuits 111 to 1m1 and 112 corresponding to areas where mobile stations PS1 to PSj, which are destinations of communication data, are located
11m to 1m2 and wireless circuits 211 to 2
k1, 212 to 2k2, and 213 to 2k3.

The control unit 53 controls the radio communication base station device B
S3 is a unit that controls each unit.
.. 11n to 1mn and wireless circuits 211 to 2k, 212 to 2k2, 213 to 2k
3 and the wide beam radio units 21 to
Control related to handover of communication using the H.23, control related to handover with another wireless communication base station apparatus, and the like are performed.

The control section 53 includes a communication link opening control section 53a, a communication quality determination section 53b, and a radio section switching control section 53c. The communication link establishment control means 53a accepts communication start requests (transmission) and reception responses from the mobile stations PS1 to PSj through the narrow beam radio units 11 to 1n or the wide beam radio units 21 to 23, and receives the mobile station PS1 to PSn. A communication link is established with PSj.

[0097] The communication quality judging means 53b includes the mobile station PS1.
マ ル チ Monitor the multipath delay spread from the delay profile of the received signal when rake receiving the transmitted signal from PSj, and if the delay amount exceeds a preset reference value, the communication quality is degraded. It is to judge.

[0098] The radio section switching control means 53c determines whether the mobile stations PS1 to PS1 are in accordance with the judgment result of the communication quality judging means 53b.
Control for switching the communication link to be established with PSj to one through narrow beam radio units 11 to 1n (when deterioration is large) or one through wide beam radio units 21 to 23 (when deterioration is small) Perform

Next, with reference to FIGS. 8 and 9, the operation of the radio communication base station apparatus BS3 having the above configuration will be described below. First, the operation when the mobile station PS1 shown in FIG. 8 makes a call will be described.

As shown in FIG. 9, when the mobile station PS1 makes a call, the communication link establishment control means 53a accepts the call through the wide beam radio unit 21 corresponding to the area ZL1 where the mobile station PS1 is located. Establish a communication link with PS1.

Then, the communication quality judging means 53b
The wide beam radio unit 21 monitors a multipath delay spread when rake receiving a transmission signal from the mobile station PS1.

At this time, the radio communication base station apparatus BS
Since no multipath signal having a larger delay amount arrives at 3 than the mobile station PS1, the communication quality determination unit 53b determines that the communication quality has not deteriorated.

Then, since the communication quality judgment means 53b does not detect the deterioration of the communication quality, the radio section switching control means 53c performs the communication with the mobile station PS1 in the same manner as when the communication link is opened, using the wide beam radio. Control is performed using the unit 21.

Next, the operation when the mobile station PS2 makes a call will be described. As shown in FIG.
2 transmits a call, which is transmitted to the communication link opening control means 5
3a receives through the wide beam radio unit 21 corresponding to the area ZL1 where the mobile station PS2 is located, and establishes a communication link with the mobile station PS2.

Next, the communication quality judgment means 53b
The wide beam radio unit 21 monitors the delay spread of multipath when rake receiving a transmission signal from the mobile station PS2.

At this time, the radio communication base station apparatus BS
3 includes the mobile station PS2 due to the presence of the reflector R shown in FIG.
Since a multipath signal with a larger delay amount has arrived, the communication quality determination unit 53b determines that the communication quality has deteriorated.

Then, since the communication quality judgment means 53b detects the deterioration of the communication quality, the radio section switching control means 53c performs the communication with the mobile station PS2 in the area ZS2 where the mobile station PS2 is located. To be performed using the narrow beam radio unit 12.

As described above, in the radio communication base station apparatus BS3 having the above configuration, even if a delay spread is generated in the communication signal, if the rake reception does not cause deterioration of the communication quality, the wide beam radio section 21 to 23. On the other hand, when a large delay spread occurs in a communication signal and reception is not possible even in rake reception, transmission is performed through the narrow beam radio units 11 to 1n to suppress transmission in the direction of the reflector R. Like that. That is, when a large delay spread occurs due to the reflector R such as a building, communication is performed by narrowing the beam width.

Therefore, according to the radio communication base station apparatus BS3 having the above configuration, it is possible to prevent the deterioration of communication quality due to the multipath signal having a large delay spread as described above.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the communication quality is prevented from being deteriorated due to the multipath signal. Instead, for example, the signal-to-noise ratio (CNR) of the received signals from the mobile stations PS1 to PSj is changed. The monitoring may be performed, and the wireless unit used for communication may be switched and controlled according to the monitoring result.

According to this, when the transmission output of the mobile stations PS1 to PSj is insufficient compared with the amount of transmission information or when the propagation loss is large, the transmission output decreases, and the signal-to-noise ratio decreases.
Communication can be performed by communicating through the narrow beam radio units 11 to 1n having a high antenna gain.

For example, in the above embodiment, the CD
Although the description has been given taking the MA method as an example, the FDMA method and the TD
The effect can be obtained even when applied to a similar wireless communication base station apparatus of the MA system. In general, rake reception is not performed in the FDMA system or the TDMA system, and the problem of multipath such as a reflected wave is serious. If the above-described third embodiment is applied to these systems, a further effect is obtained. Play.

Further, in the above description, the case where all the slave stations are mobile stations PS1 to PSj has been described, but the present invention can be applied to the case where the slave stations are fixed stations. In this case,
It is possible to efficiently operate wireless resources (frequency and spreading code) without the burden of antenna management of the wireless communication base station device due to the new installation, removal, or specification change of the stator station.

This is because, according to the present invention, since the wide beam antennas are mixed, compared to the case where a narrow beam antenna is installed for each stator station, the stator stations (which have no inconvenience even with a wide beam) are used. For example, for a slave station having a smaller communication capacity than the transmission power, communication is performed using a wide beam, and for a fixed slave station that performs large-capacity communication, a narrow beam is preferentially assigned to save a narrow beam. Power consumption can be achieved, and an optimal combination of management burden and radio resources can be obtained. It goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0115]

As described above, in the radio communication base station apparatus according to the present invention, a plurality of first communication means for forming a first beam in space and communicating with the communication apparatus via a radio line. And a first communication unit formed by the plurality of first communication units.
A second communication means for forming a second beam having a beam width wider than that of the first beam so as to include the first beam, and communicating with a communication device via a wireless line; Are formed to overlap each other.

The communication with the communication device is intermittent or continuous, what is the type of communication, or whether the communication device is moving at a high speed or not is easily affected by handover. The communication means is selectively used according to the related conditions. Therefore, according to the present invention, it is possible to provide a wireless communication base station apparatus capable of accommodating a large number of users without increasing the frequency of handover.

Further, according to the present invention, communication is performed by selectively using communication means having different beam widths according to the quality of communication with the communication apparatus. By using the narrow first communication means, it is possible to provide a wireless communication base station apparatus capable of suppressing multipath caused by a reflector or the like.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a configuration of a wireless communication base station device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a shape of a beam formed by a narrow beam radio unit and a wide beam radio unit of the radio communication base station apparatus shown in FIG.

FIG. 3 is a view for explaining communication performed between a mobile station and the wireless communication base station apparatus shown in FIG. 1;

FIG. 4 is a circuit block diagram showing a configuration of a wireless communication base station device according to a second embodiment of the present invention.

5 is a diagram showing a shape of a beam formed by a narrow beam radio unit and a wide beam radio unit of the radio communication base station apparatus shown in FIG.

FIG. 6 is a diagram for explaining communication performed between a mobile station and the wireless communication base station device shown in FIG. 4;

FIG. 7 is a circuit block diagram showing a configuration of a wireless communication base station device according to a third embodiment of the present invention.

FIG. 8 is a diagram showing a shape of a beam formed by a narrow beam radio unit and a wide beam radio unit of the radio communication base station apparatus shown in FIG.

FIG. 9 is a diagram for explaining communication performed between the mobile station and the wireless communication base station device shown in FIG. 7;

FIG. 10 is a diagram showing a configuration of a communication area of a large-zone mobile communication system.

FIG. 11 is a diagram showing a configuration of a communication area of a small-zone mobile communication system.

[Explanation of symbols]

11-1n narrow beam radio section 101, 102-10n antenna 111-1m1, 112-1m2, 11n-1mn
Wireless circuits 21, 22, 23 ... wide beam wireless units 201, 202, 203 ... antennas 211 to 2k1, 212 to 2k2, 213 to 2k3 ... wireless circuits 3, 4, 6 ... signal processing units 51, 52, 53 ... control units 51a, 52a, 53a ... communication link establishment control means 51b ... communication type judgment means 51c, 52c, 53c ... radio section switching control means 52b ... moving speed judgment means 53b ... communication quality judgment means

Claims (10)

[Claims] 1. A wireless communication base station device for connecting a communication device connected via a wireless line to a wired communication network, wherein a first beam is formed in a space to communicate with the communication device via the wireless line. And a second beam having a wider beam width than the first beam formed by the plurality of first communication means is formed so as to include the first beam. And a second communication means for communicating with the communication device via a wireless line. 2. The first communication unit performs intermittent communication with the communication device, and the second communication unit continuously and continuously communicates with the communication device. The wireless communication base station apparatus according to claim 1, wherein the communication is performed. 3. A communication type judging means for judging the type of communication performed with a communication device connected via the wireless line, and the first communication type judging means according to the judgment result of the communication type judging means. The wireless communication base station apparatus according to claim 1, further comprising: a switching control unit that selects one of the communication unit and the second communication unit to perform communication with the communication device. 4. The communication type determination unit determines whether the type of communication performed with the communication device is packet data communication or voice communication, and the switching control unit determines the type of communication performed by the communication type determination unit. When the result is packet data communication, switching control is performed to perform communication with the communication device through the first communication means,
On the other hand, when the result of the determination by the communication type determination means is voice communication, switching control is performed so as to perform communication with the communication device via the second communication means.
2. The wireless communication base station device according to 1. 5. A moving speed judging means for judging whether or not a moving speed of a communication device connected via the wireless line is high, and the first communication means according to a judgment result of the moving speed judging means. 2. The wireless communication base station apparatus according to claim 1, further comprising: switching control means for selecting one of the means and the second communication means to communicate with the communication device. 6. The switching control means, when the communication type determining means determines that the moving speed of the communication device is not high, to perform communication with the communication device through the first communication means. On the other hand, when the communication type determination unit determines that the moving speed of the communication device is high, the switching control is performed so as to perform communication with the communication device through the second communication unit. The wireless communication base station device according to claim 5. 7. The moving speed judging means judges whether or not the moving speed of the communication device is high, based on information sent from the communication device via a wireless line. Alternatively, the wireless communication base station device according to claim 6. 8. Communication performed with the communication device through the first communication means and the second communication means,
The moving speed determination means detects a fading pitch from a signal received from the communication device, and determines whether or not the moving speed of the communication device is high based on the fading pitch. The radio communication base station apparatus according to claim 5, wherein: 9. A communication quality judging unit for judging communication quality from a signal received from the communication device, and the first communication unit and the second communication unit according to a judgment result of the communication quality judging unit. 2. The wireless communication base station apparatus according to claim 1, further comprising: a switching control unit that selects one of the units and communicates with the communication device. 10. The communication quality judging means detects a delay spread of a signal received from the communication device, and when the delay spread exceeds a predetermined reference value, a communication quality of a signal received from the communication device. Is determined to be reduced, and the switching control means, when the communication quality determination means determines that the communication quality is reduced, communicates with the communication device through the first communication means. Switching control to perform the communication, and if the communication quality determining unit does not determine that the communication quality is degraded, switching control is performed to perform communication with the communication device through the second communication unit. The wireless communication base station apparatus according to claim 9, wherein