JPH09130845A - Control system for mobile communication zone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a communication zone control system for mobile objects satisfactorily keeping the quality of speech by easing congestion in a radio zone when the many mobile equipments of an output smaller than old ones are introduced to a mobile communication system by means of a large zone. SOLUTION: A base station controller 1 is provided with means informing radio zones 2a to 7a controlled by the controller 1 through base station equipments 2 to 7 of a control signal distinguishing a large zone and a small zone from each other. The mobile equipments 12 and 13 are provided with means discriminating the control signal distinguishing the informed large/small zones and recognizing either of the large and small zones as a preferential zone by each kind of the mobile equipments so as to give priority orders to the large and small zones in the radio zones by each kind of the mobile equipments. Thereby, a speech according to the priority order is attained to ease congestion in the radio zone to obtain the communication zone control system for the mobile objects, which keeps the quality of speech satisfactory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication zone control system, and in particular, it alleviates congestion in a wireless zone,
Concerning keeping good call quality.

[0002]

2. Description of the Related Art A wireless zone structure in a conventional mobile communication zone control system is a plurality of large zones 22a, 22b, etc. in which base station control devices 21b are arranged in parallel as shown in the wireless zone structure schematic diagram of FIG. Even if there is a small size instead of these large zones, it simply reduces the transmission power of the base station device and notifies the wireless zone from the base station control device via the base station device. The control signals generated were the same without any fundamental difference. In this case, since the mobile device existing in a certain wireless zone will use that wireless zone to make a call when it captures the control channel, the wireless zone that is easily captured by the usage conditions will always be in a congestion state and will move later. A call may be interrupted when the mobile device cannot make a call, or when the mobile device during a call moves to the wireless zone. In addition, when a new one with a different output electric field for each type of mobile device is introduced, the downlink signal from the base station device to the mobile device reaches near the boundary of the large zone area, but from the mobile device to the base station device. It may happen that the upstream signal does not reach. Also, when the mobile device captures the control channel after the call ends and waits, the control channel that was captured immediately before the call is used, and the mobile device moves near the zone boundary during the call. Occasionally, the level of the received electric field decreases and the standby state is entered. In addition, if you use a small zone in a large zone and increase the number of call channels, you need more frequencies, but assigning the same frequency to the call channels of adjacent wireless zones causes interference during a call. There was a problem that I could not do it.

[0003]

As described above, in the conventional mobile communication zone control system, there is always a congestion state in the wireless zone, so that the mobile device cannot make a call later, or the mobile device during a call is in progress. When the mobile phone moves to the wireless zone, the call may be interrupted. Also, if there is a difference in the output electric field for each type of mobile device, the downlink signal from the base station device to the mobile device will arrive near the boundary of the large zone area, but the uplink signal from the mobile device to the base station device will arrive. It also happens that there is no. Further, when the mobile device captures the control channel and waits after the call ends, it does not always capture the optimum control channel and enter the standby state. Further, when the small zone is used together with the large zone, there is a problem that the same frequency cannot be assigned to the call channels of the adjacent wireless zones because it causes interference during the call.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to alleviate congestion in wireless zones, maintain good call quality, and to move the same frequency to adjacent wireless zones. The purpose is to obtain a body communication zone control method.

[0005]

In order to achieve the above object, a mobile communication zone control system of the invention according to claim 1 is a base station controller for controlling a plurality of wireless zones, and the base station controller. In a mobile communication system having a mobile switching device for controlling a plurality of mobile stations, the base station control device has means for notifying a control signal for distinguishing a large zone and a small zone to a radio zone controlled via the base station device. However, the mobile device has a means for discriminating the control signal for distinguishing the large zone and the small zone from the above notification, and recognizing either the large zone or the small zone as a priority zone for each type of the mobile device, It is characterized in that the large zone and the small zone among the above-mentioned wireless zones are prioritized for each type of mobile device, and the wireless zone to be used for communication is determined with priority.

In the mobile communication zone control system of the invention according to claim 2, the base station control device and the mobile device in the mobile communication zone control system according to claim 1 have the following means respectively. And The base station control device is means for notifying a wireless zone controlled via the base station device of a control signal including control channel information of a peripheral wireless zone of the wireless zone. The mobile device prioritizes and stores the peripheral wireless zones based on the notified control channel information, and when the mobile device during a call captures the control channel after the call ends and enters a standby state. Then, the above-mentioned stored peripheral wireless zone is searched to find a means for entering the standby state by capturing the control channel of the priority zone with the strongest received electric field level or a wireless zone with a received electric field level of a predetermined value or more. A means to acquire the control channel and enter the standby state at the point of time.

According to a third aspect of the present invention, there is provided a mobile communication zone control system including a base station control device for controlling a plurality of radio zones and a mobile switching device for controlling a plurality of the base station control devices. In a communication system, when a mobile device in a call moves between zones (also referred to as handover) in a communication system, the base station control device moves the mobile station for the adjacent wireless zone in which a received electric field level of the output of the mobile device is a predetermined value or more. It is characterized in that it has means for comparing with a priority zone determined for each type of machine and prioritizing inter-zone movement of the mobile machine to the priority zone.

According to a fourth aspect of the present invention, there is provided a mobile communication zone control system including a base station control device for controlling a plurality of wireless zones and a mobile switching device for controlling the plurality of base station control devices. In the communication system, the base station controller, when any one of the communication channels of the same frequency assigned to the adjacent radio zones is used,
It is characterized in that it has means for making all speech channels of the same frequency as those mentioned above in adjacent wireless zones available.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. The first embodiment relates to a mobile communication zone control method in which a large zone and a small zone in a wireless zone are prioritized for each type of mobile device, and a wireless zone for making a call is preferentially used to determine a wireless zone. . FIG. 1 is a schematic diagram of a common wireless zone configuration for explaining the first, second and third embodiments. FIG. 2 is a signal format of a control signal notified to the wireless zone by the base station control device according to the first embodiment via the base station device. FIG. 3 is a diagram for explaining the operation of the mobile device according to the first embodiment. In FIG. 1, 1a
Is a mobile switching device, 1b is a base station control device, 2 to 7 are base station devices, 2a and 3a are large zones controlled by the base station control device via the base station device, and 4a to 7a are base station control devices. A small zone where the device is controlling via the base station device, 1
2 and 13 are mobile devices.

In the mobile communication zone control system configured as described above, the base station control device is the base station devices 2-7.
A control signal of the signal format shown in FIG. 2 is transmitted to the area of each of the wireless zones 2a to 7a which are respectively controlled via the, and the mobile station determines whether the wireless zone is a large zone or a small zone. Inform them. On the other hand, the mobile device existing in the wireless zone receives the above-notified control signal, determines whether the wireless zone is the large zone or the small zone, and determines whether the wireless device is the large zone or the small zone for each type of the mobile device. Is recognized as a priority zone, and the priority zone is used preferentially to make a call. The operation of the mobile device in this mobile communication zone control system will be described with reference to FIG. That is, (1) in step 100, the control signal notified to the wireless zone is received from the base station control device via the base station device. (2) In step 101, it is determined whether the wireless zone of the control signal to be captured by the mobile device is the large zone or the small zone. (3) In step 102, it is determined for each type of the mobile device whether the zone is a priority zone. (4) In step 103, location registration processing is performed with the base station controller. (5) In step 104, based on the control channel information of the peripheral wireless zone of the wireless zone included in the notified control signal, the peripheral wireless zone is prioritized and stored for each type of the mobile device. . Details of step 104 will be described in the second embodiment. As described above, the large zone and the small zone in the wireless zone are prioritized for each type of mobile device, and the wireless zone is preferentially used to make a call, thereby alleviating the congestion of the wireless zone. It is possible to obtain a mobile communication zone control method capable of

Embodiment 2. In the second embodiment, when a mobile device in a call captures a control channel after ending a call and enters a standby state, the stored peripheral wireless zone is searched and the priority zone with the strongest received electric field level is selected. The present invention relates to a mobile communication zone control method in which a control channel is acquired to enter a standby state, or when a wireless zone having a reception electric field level of a predetermined value or more is found, the control channel is acquired to enter a standby state. FIG. 4 shows the second embodiment.
FIG. 2 is a schematic diagram of a wireless zone configuration for explaining the above, showing in detail the configuration of the wireless zone shown in FIG. 1, and omitting the mobile switching device 1a and the base station control device 1b shown in FIG. FIG. 5 is a diagram for explaining the operation of the mobile device in Embodiment 2 when the mobile device during a call captures the control channel after the call ends and enters the standby state. In FIG. 4, 2 to 9 are base station devices, and 2a and 3a are adjacent to each other in a large zone controlled by a base station control device (not shown) via the base station device. Similarly, 4a to 9a are small zones controlled by the base station control device via the base station device and are included in the large zone 2a. 14 is a mobile device.

In the mobile communication zone control system configured as described above, the base station control device is the base station devices 2-9.
The control signals of the signal format shown in FIG. 2 are transmitted to the areas of the wireless zones 2a to 9a which are respectively controlled via the, to notify the control channel information of the peripheral wireless zones adjacent to the respective wireless zones. For example, in the area of the wireless zone 2a, the control channel information of the wireless zones 3a to 9a is notified, and in the area of the wireless zone 6a, the control channel information of the wireless zones 2a, 4a, 7a, 8a is notified. As shown in step 104 of FIG. 3 in the first embodiment, the mobile station in each wireless zone has priority over the wireless zone around the wireless zone based on the notified control channel information. Make a ranking and memorize. For example, when the mobile device 14 existing in the wireless zone 6a is a mobile model having a large transmission output, the first priority is the wireless zone 2
a, and there are 4a, 7a, and 8a in the peripheral wireless zone, which are stored as non-priority zones. On the other hand, when the mobile device 14 existing at the same position as the above is a mobile model having a small transmission output, The first priority is the wireless zone 6a, and the peripheral wireless zones 4a, 7a, 8a are stored as the priority zones for mobile models having small transmission output.

Next, referring to FIG. 5, the operation of the mobile unit in the second embodiment when the mobile unit during a call ends the call, releases the call channel, captures the control channel, and enters a standby state will be described. explain. That is, (1) In step 300, it is determined whether or not the control channel currently to be acquired is the control channel of the priority zone of the mobile device, including whether the received electric field level is a predetermined value or more. If so, the process proceeds to step 310 to capture the control channel and enter the standby state. If not, go to Step 301. (2) In step 301, based on the control channel information notified before the call, the peripheral wireless zones that have been prioritized and stored are analyzed. (3) In step 302, it is determined whether or not there is a priority zone determined by the type of the mobile device in the above. If yes, go to step 303, otherwise go to step 304
Proceed to. (4) In step 303, it is measured whether or not the received electric field in the priority zone is equal to or more than a predetermined value at the place where the mobile device is currently located, and if there is, the process proceeds to step 310 to capture the control channel in the priority zone and set it in the standby state. If the answer is yes or no, the process proceeds to step 304. (5) In step 304, among the peripheral wireless zones that are prioritized and stored, the received electric field is determined for the priority zone of the mobile unit that is not above the predetermined value and the non-priority zone of the mobile unit. Measure. (6) In step 305, it is determined whether or not the measurement result is equal to or larger than a predetermined value. If yes, the process proceeds to step 310, the control channel is captured and the standby state is entered, and if no, the process proceeds to step 306. (7) In step 306, the received electric field is measured for other wireless zones not stored as the peripheral wireless zone. (8) In step 307, it is determined whether or not the measurement result is equal to or more than a predetermined value. If yes, the process proceeds to step 310, the control channel of the wireless zone is captured to enter the standby state, and if no, to step 311. move on. (9) In step 311, the out-of-range display is performed because the control channel of any wireless zone cannot be captured. As described above, the peripheral wireless zones that have been stored with priorities are searched, and the control channel of the priority zone with the strongest received electric field level is captured to enter the standby state, or the received electric field level is predetermined. When a wireless zone having a value equal to or more than the value is found, the control channel is captured and the standby state is entered, so that a mobile communication zone control method capable of maintaining good call quality can be obtained.

Embodiment 3 The third embodiment relates to a mobile communication zone control method in which, when a mobile device in a call moves between zones, priority is given to inter-zone movement to a priority zone determined for each type of mobile device. FIG. 1 is a schematic diagram of a common wireless zone configuration for explaining the third embodiment. FIG. 6 is a diagram for explaining the operation of the base station control device in the third embodiment. The outline of the operation of the third embodiment will be described with reference to the wireless zone configuration outline diagrams of FIGS. 1 and 4 which have already been used to describe the first and second embodiments. Now, the mobile device 14 in the wireless zone 6a that is in a call
However, if an attempt is made to move between zones, the base station control device receives the output of the mobile device 14 from the base station devices in the peripheral wireless zones 4a, 7a, 8a and 2a adjacent to the wireless zone 6a. It is assumed that an electric field is instructed to be measured, and as a result of the measurement, only the wireless zones 7a and 2a have a predetermined value or more of the received electric field for each type of mobile device. The measured result is collated with the type of mobile device that moves between zones, and the mobile device 1
If 4 is a mobile model having a small transmission output, it is instructed to perform inter-zone movement to the wireless zone 7a. The operation of the base station control device in this mobile communication zone control system when a mobile device in a call moves between zones will be described with reference to FIG. That is, (1) In step 200, the base station control device detects deterioration of the received electric field level of the mobile device through the base station device. (2) The base station control device that has detected the deterioration in step 201 instructs the base station device in the wireless zone adjacent to the wireless zone in which the mobile device in the call is to measure the received electric field level of the output of the mobile device. (3) In step 202, the base station control device determines based on the measurement result from the base station device instructed to perform measurement to determine the wireless zone in which the mobile device is moved between zones. (4) In step 203, the measured result is collated with the type of the mobile unit that performs the inter-zone movement, and it is determined whether the inter-zone movement can be made to the priority zone determined by the type of the mobile unit. If yes, in step 205, a call channel switching is instructed to promote movement between zones. If not, step 2
Go to 04. (5) In step 204, in the case of a wireless zone (non-priority zone) other than the priority zone, it is determined whether the received electric field level is equal to or higher than a predetermined value. If yes, the call channel switching is instructed in step 205, and if no, step 206
Proceed to. (6) In step 205, the mobile station is instructed to switch the communication channel through the base station apparatus to prompt the movement between zones. (7) In step 206, the base station device is notified that the mobile unit cannot move between zones. As described above, when a mobile device during a call moves between zones, priority is given to moving between zones to a priority zone that is determined for each type of mobile device, thereby reducing congestion in the wireless zone and improving call quality. It is possible to obtain a mobile communication zone control system that can keep the above good.

Embodiment 4 The fourth embodiment relates to a mobile communication zone control method for allocating the same frequency to adjacent wireless zones and effectively using the frequency. FIG. 7 is a diagram exemplifying a state in which speech channels of the same frequency are assigned to adjacent wireless zones in the fourth embodiment. FIG. 8 is a diagram illustrating an example of a management table of the base station control device according to the fourth embodiment. In FIG.
The wireless zones 10a and 11a are wireless zones adjacent to each other, and a case where a call channel of the same frequency is assigned to both of them will be described. In this case, the wireless zone 10
a S4 channel and wireless zone 11a S3 channel,
In addition, the S5 channel of the wireless zone 10a and the wireless zone 1
The S4 channels of 1a have the same frequency. Now, when the S4 channel of the wireless zone 10a becomes busy, the S3 channel of the wireless zone 11a is also set to "in use" at the same time so as not to cause mutual interference between the calling channels. The base station control device according to the fourth embodiment has a management table as illustrated in FIG. 10, and one communication channel in the wireless zone having the same frequency use management number (for example, pay attention to the management number 1) If it is "in use", a call channel of another wireless zone within the same frequency use management number 1 (in this case, S3 of the wireless zone 11a is used).
Channel) is also "in use". As described above, when the call channels of the same frequency are assigned to the adjacent wireless zones, and when any one of them is used, it is determined that all the call channels of the same frequency in the adjacent wireless zones are in use. By doing so, the same frequency can be assigned to adjacent wireless zones, and a mobile communication zone control method can be obtained in which effective use of frequencies can be expected. The "call" in each of the above embodiments is not necessarily limited to voice, and includes data communication.

[0016]

As described above, according to the mobile communication zone control system of the invention according to claim 1, the large zone and the small zone of the wireless zone are configured to be prioritized for each type of mobile unit. As a result, it is possible to obtain a mobile communication zone control method that allows a call to be made in accordance with the priority, and alleviates congestion in the wireless zone and maintains good call quality.

As described above, according to the mobile communication zone control method of the present invention as claimed in claim 2, the mobile station searches the peripheral wireless zone which has been stored in order of priority, and the highest received electric field level is obtained. The control channel of a priority zone with a strong priority is captured to enter the standby state, or when a wireless zone with a received electric field level of a specified value or more is found, the control channel is captured and the standby state is set to improve the call quality. It is possible to obtain a mobile communication zone control method that can be kept good.

As described above, according to the mobile communication zone control system of the invention of claim 3, when the mobile unit in a call moves between zones (handover), the received electric field output from the mobile unit is used. By comparing adjacent wireless zones whose level is equal to or higher than a predetermined value with a priority zone determined for each type of the mobile device, and prioritizing inter-zone movement to the priority zone of the mobile device, the congestion of the wireless zone is reduced. It is possible to obtain a mobile communication zone control method that can alleviate and maintain good call quality.

As described above, according to the mobile communication zone control system of the invention according to claim 4, the base station controller uses one of the communication channels of the same frequency assigned to the adjacent radio zones. In this case, by providing a means to make all the call channels of the same frequency as those in the adjacent radio zone in use, the same frequency can be assigned to the adjacent radio zone, and the effective use of the frequency can be achieved. Can obtain the mobile communication zone control method desired by the customer.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a common wireless zone configuration for explaining Embodiments 1, 2, and 3 of the present invention.

FIG. 2 is an example of a signal format of a control signal notified to a wireless zone controlled by the base station control device in FIG. 1 via the base station device.

FIG. 3 is a diagram illustrating an operation of the mobile device according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a wireless zone configuration for explaining a second embodiment of the present invention.

FIG. 5 is a diagram illustrating an operation of the mobile device according to the second embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the base station control device in the third embodiment of the present invention.

[Fig. 7] Fig. 7 is a diagram for explaining call channel allocation of the same frequency to adjacent wireless zones according to Embodiment 4 of the present invention.

FIG. 8 is a diagram illustrating a management table of a base station controller according to Embodiment 4 of the present invention.

FIG. 9 is a schematic diagram of a wireless zone configuration showing a conventional mobile communication zone control system.

[Explanation of symbols]

 1a Mobile switching device 1b Base station control device 2-9 Base station device 2a-11a Wireless zone 12-14 Mobile device

Claims (4)

[Claims] 1. A mobile communication system comprising a base station control device for controlling a plurality of radio zones and a mobile switching device for controlling a plurality of the base station control devices, wherein the base station control device is via a base station device. The wireless zone being controlled has means for notifying a control signal that distinguishes between the large zone and the small zone, and the mobile device determines the above-notified control signal that distinguishes between the large zone and the small zone, It has a means to recognize either the large zone or the small zone as a priority zone for each type of, and prioritizes the large zone and the small zone in the above wireless zone for each type of mobile device and uses them preferentially. A mobile communication zone control method, characterized in that a wireless zone for making a call is determined. 2. The base station control device has means for notifying a radio zone controlled through the base station device of a control signal including control channel information of a radio zone in the vicinity of the radio zone, and the mobile device is the above-mentioned. Means for prioritizing and storing the above-mentioned peripheral wireless zones based on the notified control channel information, and the above-mentioned storage when the mobile device in a call captures the control channel after the call ends and enters a standby state. Search for the surrounding wireless zone and acquire the control channel of the priority zone with the strongest received electric field level and enter the standby state, or control when the wireless zone with the received electric field level is above a certain value is found 2. The mobile communication zone control system according to claim 1, further comprising means for capturing a channel and entering a standby state. 3. A mobile communication system having a base station controller for controlling a plurality of wireless zones and a mobile switching device for controlling a plurality of the base station controllers, wherein the base station controller is a mobile device in communication. At the time of performing inter-zone movement (handover), an adjacent wireless zone having a reception electric field level of the output of the mobile device equal to or more than a predetermined value is compared with a priority zone determined for each type of the mobile device, and the mobile device A mobile communication zone control method, characterized in that it has means for prioritizing inter-zone movement to the priority zone. 4. In a mobile communication system having a base station controller for controlling a plurality of radio zones and a mobile switching device for controlling a plurality of the base station controllers, the base station controller is assigned to adjacent radio zones. Mobile communication, characterized in that when any one of the designated communication channels of the same frequency is used, all the communication channels of the same frequency in the adjacent radio zone are in use. Zone control method.