JP3618097B2 - Radio channel control method, radio channel control system, and radio channel control station - Google Patents

Radio channel control method, radio channel control system, and radio channel control station Download PDF

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Publication number
JP3618097B2
JP3618097B2 JP2002143567A JP2002143567A JP3618097B2 JP 3618097 B2 JP3618097 B2 JP 3618097B2 JP 2002143567 A JP2002143567 A JP 2002143567A JP 2002143567 A JP2002143567 A JP 2002143567A JP 3618097 B2 JP3618097 B2 JP 3618097B2
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Prior art keywords
mobile communication
communication system
radio
frequency
sharable
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JP2003333648A (en
Inventor
憲哉 仲井間
健 内山
耕太 内藤
昭宏 前原
拓 新山
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株式会社エヌ・ティ・ティ・ドコモ
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radio network control method, a radio network control system, and a radio network control station.
[0002]
[Prior art]
With the development of mobile communication technology, a plurality of mobile communication systems such as a PDC system using a TDMA system, a PDC packet system using a packet system, and an IMT2000 system using a CDMA system have been put into practical use. The plurality of mobile communication systems communicate with mobile stations through their own radio base stations.
[0003]
The radio zones provided by the radio base stations of each of the plurality of mobile communication systems often overlap each other. In such wireless zones that overlap each other, it is necessary to prevent radio wave interference between a plurality of mobile communication systems. Therefore, in such a case, different frequencies are used for each of the plurality of mobile communication systems for communication between the radio base station and the mobile station. That is, for example, when three mobile communication systems A, B, and C are operated, the mobile communication system A uses the frequencies f1 and f2 and the mobile communication system B The frequency f3 is used, and the mobile communication system C is set in advance to use the frequency f4. Therefore, when a call occurs, the radio network controller of each of the plurality of mobile communication systems allocates a channel to the preset frequency and establishes communication between the radio base station and the mobile station.
[0004]
[Problems to be solved by the invention]
Here, since a plurality of mobile communication systems have different communication methods and service forms, the time zone during which communication traffic increases and the time zone during which communication traffic increases are often different. In this case, if a plurality of mobile communication systems each use a fixed frequency in advance as in the prior art, communication traffic is large and operating frequencies are insufficient in wireless zones that overlap each other. In many cases, a mobile communication system and a mobile communication system with a small communication traffic and a sufficient operating frequency are mixed, and the frequency cannot be used efficiently. In particular, in a mobile communication system in which communication traffic is large and the operating frequency is insufficient, it is conceivable that the number of channels allocated to a call that has occurred is insufficient and connection quality is degraded.
[0005]
Accordingly, the present invention provides a radio channel control method, radio channel control system, and radio channel control station that can solve these problems and can efficiently use a frequency when a plurality of mobile communication systems coexist. Is an issue.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problem, the radio network control method of the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station is performed in the radio zone. A wireless channel control method for controlling a use state of a frequency that can be shared among a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared. When the communication traffic acquired in the first acquisition step for acquiring communication traffic in the wireless zone is equal to or greater than a predetermined amount, a frequency that can be shared from the one mobile communication system is used. Request the use of the shareable frequency in the one mobile communication system. A request step, a second acquisition step of acquiring communication traffic of the wireless zone in the other mobile communication system, and a predetermined amount of communication traffic acquired in the second acquisition step in response to a request in the request step If it is less than, the wireless communication using the sharable frequency is stopped in the other mobile communication system, the transmission of the radio wave of the sharable frequency is stopped, and the other mobile communication system is the one mobile And an allowable step for allowing the communication system to use the sharable frequency.
[0010]
In order to solve the above problems, the radio network control system according to the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station is performed in the radio zone. A radio network control system for controlling the use state of the sharable frequency between each of a plurality of mobile telecommunications systems in which frequencies that can be shared with each other are provided. A first acquisition means for acquiring communication traffic in the radio zone in the one mobile communication system; and a predetermined amount of communication traffic provided in the first mobile communication system and acquired in the first acquisition means. In the case of the above, the one mobile communication system with respect to another mobile communication system using a sharable frequency. Requesting means for requesting use of the sharable frequency, second acquisition means provided in the other mobile communication system for acquiring the communication traffic of the radio zone in the other mobile communication system, and the other If the communication traffic acquired by the second acquisition means is less than a predetermined amount in response to a request from the request means of the one mobile communication system, the other mobile communication system And a permitting means for stopping wireless communication using the sharable frequency, stopping transmission of radio waves having the sharable frequency, and allowing the one mobile communication system to use the sharable frequency. It is characterized by having.
[0011]
In this case, a radio channel control station constituting the radio channel control system is provided in the one mobile communication system, an acquisition unit that acquires communication traffic of the radio zone in the one mobile communication system, and the acquisition unit Requesting means for requesting use of the sharable frequency in the one mobile communication system to another mobile communication system using the sharable frequency when the communication traffic acquired in the above is a predetermined amount or more It is characterized by having.
[0012]
Further, another radio network controller constituting the radio network control system is provided in the other mobile communication system, an acquisition means for acquiring communication traffic of the radio zone in the other mobile communication system, and the one In response to a request for use of the sharable frequency from the mobile communication system, when the communication traffic acquired by the acquiring unit is less than a predetermined amount, the sharable frequency in the other mobile communication system is used. The wireless communication is stopped, the transmission of the radio wave having the sharable frequency is stopped, and the first mobile communication system is provided with permission means for allowing the use of the sharable frequency to the one mobile communication system.
[0013]
A frequency that can be shared among multiple mobile communication systems is prepared, and can be shared with other mobile communication systems that use a frequency that can be shared when the communication traffic of one mobile communication system is greater than or equal to a predetermined amount. When the other communication traffic is less than a predetermined amount, the wireless communication using the sharable frequency is stopped in the other mobile communication system, and the radio wave having the sharable frequency is transmitted. And by allowing the use of a frequency that can be shared with the one mobile communication system, the authority to use the frequency that can be shared is transferred from the other mobile communication system with a relatively small communication traffic to the communication traffic. It is possible to move to the relatively large mobile communication system.
[0014]
Furthermore, in order to solve the above-mentioned problem, the radio network control method of the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station in the radio zone. A wireless channel control method for controlling a use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared, and each of the plurality of mobile communication systems The priority order regarding the use of the sharable frequency is defined, and acquired in the first acquisition step and the first acquisition step of acquiring communication traffic of the radio zone in one mobile communication system When communication traffic is more than a predetermined amount, a frequency that can be shared by the one mobile communication system is set. A request step for requesting use of the sharable frequency in the one mobile communication system to other mobile communication systems used, and a priority order of the one mobile communication system according to a request in the request step Is higher than the priority of the other mobile communication system, the wireless communication using the sharable frequency in the other mobile communication system is stopped, the transmission of the radio wave of the sharable frequency is stopped, Another mobile communication system includes an allowable step for allowing the use of the sharable frequency to the one mobile communication system.
[0015]
In order to solve the above problems, the radio network control system according to the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station is performed in the radio zone. There is a radio network control system for controlling the use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared. A first acquisition unit that has a priority order for use of the sharable frequency, is provided in one mobile communication system, and acquires communication traffic of the radio zone in the one mobile communication system; and Communication traffic provided in one mobile communication system and acquired by the first acquisition means is Request means for requesting use of the sharable frequency in the one mobile communication system to another mobile communication system using a sharable frequency if it is equal to or greater than a fixed amount, and the other mobile communication system If the priority of the one mobile communication system is higher than the priority of the other mobile communication system in response to a request from the request means of the one mobile communication system, the other mobile communication system And a permitting means for stopping wireless communication using the sharable frequency, stopping transmission of radio waves having the sharable frequency, and allowing the one mobile communication system to use the sharable frequency. It is characterized by having.
[0016]
In this case, a radio channel control station constituting the radio channel control system is provided in the one mobile communication system, an acquisition unit that acquires communication traffic of the radio zone in the one mobile communication system, and the acquisition unit Requesting means for requesting use of the sharable frequency in the one mobile communication system to another mobile communication system using the sharable frequency when the communication traffic acquired in the above is a predetermined amount or more It is characterized by having.
[0017]
Further, another radio network controller constituting the radio network control system is provided in the other mobile communication system, and in response to a request for use of the sharable frequency from the one mobile communication system, If the priority of the mobile communication system is higher than the priority of the other mobile communication system, the wireless communication using the shareable frequency in the other mobile communication system is stopped, and the radio wave of the shareable frequency is used. And a permitting means for allowing the use of the sharable frequency to the one mobile communication system.
[0018]
A frequency that can be shared among a plurality of mobile communication systems is prepared, and when the communication traffic of one mobile communication system is equal to or greater than a predetermined amount, another mobile communication system that uses a frequency that can be shared is used. When the use of a frequency that can be shared is requested and the priority of the one mobile communication system is higher than the priority of the other mobile communication system, wireless communication using the frequency that can be shared in the other mobile communication system is performed. By stopping the transmission of radio waves with a frequency that can be shared, and allowing the use of a frequency that can be shared with the above one mobile communication system, the authority to use the frequency that can be shared is given to the low priority It is possible to move from the other mobile communication system to the one mobile communication system having a high priority and a relatively large communication traffic.
[0019]
Furthermore, the radio channel control method further includes a second acquisition step of acquiring communication traffic of the radio zone in the other mobile communication system, wherein the permissible step corresponds to the request in the request step. If the priority of the mobile communication system is equal to or lower than the priority of the other mobile communication system, and the communication traffic acquired in the second acquisition step is less than a predetermined amount, The wireless communication using the sharable frequency is stopped in another mobile communication system, the transmission of radio waves of the sharable frequency is stopped, and the other mobile communication system is connected to the one mobile communication system. It is preferable to use a frequency that can be shared.
[0020]
The radio network control system further includes a second acquisition unit that is provided in the other mobile communication system and acquires the communication traffic of the radio zone in the other mobile communication system. The permission means of the system is a case where the priority of the one mobile communication system is equal to or lower than the priority of the other mobile communication system in response to a request from the request means of the one mobile communication system. And when the communication traffic acquired by the second acquisition means is less than a predetermined amount, the wireless communication using the sharable frequency in the other mobile communication system is stopped, and the sharable frequency And the use of the sharable frequency is allowed for the one mobile communication system. It is suitable.
[0021]
In this case, the another radio network controller that constitutes the radio network control system further includes an acquisition unit that acquires the communication traffic of the radio zone in the other mobile communication system, and the permission unit includes In response to a request from the mobile communication system to use the sharable frequency, the priority of the one mobile communication system is equal to or lower than the priority of the other mobile communication system, and the acquisition is performed. When the communication traffic acquired by the means is less than a predetermined amount, the wireless communication using the sharable frequency in the other mobile communication system is stopped, the transmission of the radio wave of the sharable frequency is stopped, It is preferable that use of the sharable frequency is permitted for one mobile communication system.
[0022]
When the priority of one mobile communication system is equal to or lower than the priority of another mobile communication system, and the communication traffic of the other mobile communication system is less than a predetermined amount, the other mobile Wireless communication using a sharable frequency in a communication system is stopped, transmission of radio waves with a sharable frequency is stopped, and the use of a sharable frequency is allowed for the above-mentioned one mobile communication system. The authority to use a possible frequency can be transferred from the other mobile communication system having a high priority but low communication traffic to the one mobile communication system having a low priority but high communication traffic.
[0023]
Furthermore, in order to solve the above-mentioned problem, the radio network control method of the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station in the radio zone. A wireless channel control method for controlling a use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared, and each of the plurality of mobile communication systems In the acquisition step of acquiring the communication traffic in the wireless zone, the notification step of notifying the main mobile communication system from each of the plurality of mobile communication systems, the notification in the acquisition step, and notification in the notification step The main mobile traffic based on the communication traffic When the system extracts the mobile communication system with the largest communication traffic and the mobile communication system with the largest communication traffic is different from the mobile communication system using the sharable frequency, the main mobile communication system is In the mobile communication system using the sharable frequency, the radio communication using the sharable frequency is stopped, the transmission of the radio wave of the sharable frequency is stopped, and the mobile communication having the largest communication traffic is stopped. And an allowable step for allowing the system to use the sharable frequency.
[0024]
In order to solve the above problems, the radio network control system according to the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station is performed in the radio zone. A radio network control system for controlling a use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared, and each of the plurality of mobile communication systems Provided in each of the plurality of mobile communication systems, and acquisition means for acquiring communication traffic in the wireless zone, and movement provided in each of the plurality of mobile communication systems, the communication traffic acquired by the acquisition means as a main trunk Notification means for notifying the communication system and the main mobile communication system The mobile communication system having the largest communication traffic is extracted based on the communication traffic notified from the notification means of each of the plurality of mobile communication systems, and can be shared with the mobile communication system having the largest communication traffic. If the mobile communication system using the frequency is different, wireless communication using the sharable frequency in the mobile communication system using the sharable frequency is stopped, and radio waves having the sharable frequency are stopped. The transmission system is characterized in that it includes an accepting means for stopping transmission and allowing the use of the sharable frequency for the mobile communication system having the largest communication traffic.
[0025]
In this case, a radio channel control station constituting the radio channel control system is provided in the one mobile communication system, an acquisition unit that acquires communication traffic of the radio zone in the one mobile communication system, and the acquisition unit And a notification means for notifying the main mobile communication system of the communication traffic acquired by (1).
[0026]
Further, another radio channel control station constituting the radio channel control system is provided in a main mobile communication system, and the radio zone in each of the plurality of mobile communication systems notified from each of the plurality of mobile communication systems. If the mobile communication system with the largest communication traffic is extracted from the mobile communication system using the sharable frequency, the mobile communication system with the largest communication traffic is extracted. In a mobile communication system using a different frequency, wireless communication using the sharable frequency is stopped, transmission of radio waves of the sharable frequency is stopped, and the mobile communication system having the largest communication traffic is stopped. It is characterized by having an accepting means for allowing the use of the sharable frequency. To have.
[0027]
Prepare a frequency that can be shared among multiple mobile communication systems, notify the communication traffic of each of the multiple mobile communication systems to the main mobile communication system, and share the frequency with the mobile communication system with the largest communication traffic When the mobile communication system using the mobile communication system is different, the main mobile communication system stops the wireless communication using the sharable frequency in the mobile communication system using the sharable frequency. By stopping the transmission of radio waves of possible frequencies and allowing the use of sharable frequencies for mobile communication systems with the largest communication traffic, the authority to use sharable frequencies is given to mobile communications with the greatest communication traffic. Can be transferred to the system. Further, in a mobile communication system other than the main mobile communication system, it is only necessary to notify the main mobile communication system of the communication traffic of the own mobile communication system, and the configuration of the radio network controller is simplified.
[0028]
Furthermore, in order to solve the above-mentioned problem, the radio network control method of the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station in the radio zone. A wireless channel control method for controlling a use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared, and each of the plurality of mobile communication systems A priority order for use of the sharable frequency and a threshold value for communication traffic are defined, and an acquisition step for acquiring communication traffic in the radio zone in each of the plurality of mobile communication systems, and the acquisition step The communication traffic acquired in step 1 is used for each of the plurality of mobile communication systems. A notification step of notifying the main mobile communication system from the communication system, and based on the communication traffic notified in the notification step, the main mobile communication system is a mobile communication system in which the communication traffic is equal to or greater than the threshold value. The mobile communication system with the highest priority is extracted from the extracted mobile communication systems, and the mobile communication system with the highest priority and the mobile communication system using the sharable frequency are If they are different, the main mobile communication system stops the wireless communication using the sharable frequency in the mobile communication system using the sharable frequency, and transmits the radio wave of the sharable frequency. The mobile communication system with the highest priority is allowed to use the shareable frequency. Is characterized in that a permissible steps of.
[0029]
In order to solve the above problems, the radio network control system according to the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station is performed in the radio zone. A radio network control system for controlling a use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared, and each of the plurality of mobile communication systems Priority for use of the sharable frequency and a threshold value for communication traffic are defined, provided in each of the plurality of mobile communication systems, and communication in the radio zone in each of the plurality of mobile communication systems. An acquisition means for acquiring traffic, and each of the plurality of mobile communication systems And a notification means for notifying the main mobile communication system of communication traffic acquired by the acquisition means, and a notification from each of the plurality of mobile communication systems provided in the main mobile communication system. A mobile communication system having communication traffic equal to or higher than the threshold value is extracted based on the received communication traffic, a mobile communication system having the highest priority is extracted from the extracted mobile communication systems, and the priority Wireless communication using the shareable frequency in the mobile communication system using the sharable frequency is different from the mobile communication system using the sharable frequency. Stop the transmission of the radio wave with the frequency that can be shared, and move with the highest priority. It is characterized in that a permissible means for permitting the use of the sharable frequency for signal system.
[0030]
In this case, a radio channel control station constituting the radio channel control system is provided in the one mobile communication system, an acquisition unit that acquires communication traffic of the radio zone in the one mobile communication system, and the acquisition unit And a notification means for notifying the main mobile communication system of the communication traffic acquired by (1).
[0031]
Further, another radio channel control station constituting the radio channel control system is provided in the main mobile communication system, and the radio in each of the plurality of mobile communication systems notified from each of the plurality of mobile communication systems. Based on the communication traffic of the zone, a mobile communication system whose communication traffic is equal to or higher than the threshold value is extracted, a mobile communication system with the highest priority is extracted from the extracted mobile communication systems, and the priority Wireless communication using the shareable frequency in the mobile communication system using the sharable frequency is different from the mobile communication system using the sharable frequency. Stop the transmission of the radio wave with the frequency that can be shared, and move with the highest priority. It is characterized by having a tolerance means for allowing the use of the sharable frequency for signal system.
[0032]
A frequency that can be shared between a plurality of mobile communication systems is prepared, the communication traffic of each of the plurality of mobile communication systems is notified to the main mobile communication system, and the communication traffic exceeds the threshold. If the mobile communication system having the highest priority is different from the mobile communication system using the sharable frequency, the main mobile communication system is shared in the mobile communication system using the sharable frequency. Can be shared by stopping wireless communication using possible frequencies, stopping transmission of radio waves with sharable frequencies, and allowing use of sharable frequencies for mobile communication systems with the highest priority above Authority to use different frequencies can be transferred to a mobile communication system with relatively large communication traffic and high priority. Further, in a mobile communication system other than the main mobile communication system, it is only necessary to notify the main mobile communication system of the communication traffic of the own mobile communication system, and the configuration of the radio network controller is simplified.
[0033]
Furthermore, in order to solve the above-mentioned problem, the radio network control method of the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station in the radio zone. A wireless channel control method for controlling a use state of a frequency that can be shared among a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared. A first acquisition step of acquiring communication traffic in a wireless zone, and when the communication traffic acquired in the first acquisition step is equal to or greater than a predetermined amount, A first requesting step for requesting use of the shareable frequency in the one mobile communication system; Use of the shareable frequency in the one mobile communication system with respect to another mobile communication system using a frequency that can be shared by the main mobile communication system in response to the request in the first request step. A second request step for requesting communication, a second acquisition step for acquiring communication traffic in the wireless zone in the other mobile communication system, and the communication traffic acquired in the second acquisition step is less than a predetermined amount. In some cases, the wireless communication using the sharable frequency in the other mobile communication system is stopped, the transmission of the radio wave of the sharable frequency is stopped, and the sharable to the one mobile communication system. And an allowable step for allowing the use of the frequency.
[0034]
In order to solve the above problems, the radio network control system according to the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station is performed in the radio zone. A radio network control system for controlling the use state of the sharable frequency between each of a plurality of mobile telecommunications systems in which frequencies that can be shared with each other are provided. A first acquisition means for acquiring communication traffic in the wireless zone in the one mobile communication system, and a predetermined amount of communication traffic provided in the one mobile communication system and acquired by the first acquisition means. In the case of the above, the sharable mobile communication system can be shared with the main mobile communication system. The first request means for requesting the use of the wave number and the main mobile communication system are provided with a frequency that can be shared in response to a request from the first request means of the one mobile communication system. A second request means for requesting the other mobile communication system to use the sharable frequency in the one mobile communication system, and the other mobile communication system provided in the other mobile communication system. In response to a request from the second request means provided in the other mobile communication system and the main mobile communication system, in response to a request from the second request means provided in the other mobile communication system. When the communication traffic acquired by the acquisition means is less than a predetermined amount, wireless communication using the sharable frequency in the other mobile communication system is stopped. Stops radio wave transmission of the sharable frequency, it is characterized in that a permissible means for permitting the use of the sharable frequency to said one mobile communication system.
[0035]
In this case, a radio channel control station constituting the radio channel control system is provided in the one mobile communication system, an acquisition unit that acquires communication traffic in the radio zone in the one mobile communication system, and the acquisition unit When the communication traffic acquired by the mobile communication system is equal to or greater than a predetermined amount, a request means for requesting the main mobile communication system to use the sharable frequency in the one mobile communication system is provided. Yes.
[0036]
Further, another radio network control station constituting the radio network control system is provided in the main mobile communication system, and can be shared according to a request for use of the sharable frequency from one mobile communication system. And a request means for requesting the use of the sharable frequency in the one mobile communication system to another mobile communication system using a different frequency.
[0037]
Further, another radio network controller constituting the radio network control system is provided in the other mobile communication system, and an acquisition means for acquiring communication traffic of the radio zone in the other mobile communication system, When the communication traffic acquired by the acquisition means is less than a predetermined amount in response to a request for using the sharable frequency in the one mobile communication system transmitted from the mobile communication system, the other mobile communication Permissive means for stopping wireless communication using the sharable frequency in the system, stopping transmission of radio waves of the sharable frequency, and allowing the use of the sharable frequency to the one mobile communication system It is characterized by having.
[0038]
A frequency that can be shared between a plurality of mobile communication systems is prepared, and can be shared from the one mobile communication system to the main mobile communication system when the communication traffic of one mobile communication system is a predetermined amount or more. Requesting the use of a frequency, and further requesting the use of a frequency that can be shared with other mobile communication systems that use a frequency that can be shared by the main mobile communication system. When the amount is less than the predetermined amount, the wireless communication using the frequency that can be shared in the other mobile communication system is stopped, the transmission of the radio wave of the frequency that can be shared is stopped, and it can be shared with the one mobile communication system By allowing the use of different frequencies, the authority to use sharable frequencies can be transferred from other mobile communication systems with relatively low communication traffic. It can be transferred to Hick larger the one of the mobile communication system. Also, by requesting the use of a frequency that can be shared with other mobile communication systems via the main mobile communication system, compared to the case of requesting the use of frequencies that can be shared directly with other mobile communication systems. The radio network controller of mobile communication systems other than the main mobile communication system can have a simple configuration. On the other hand, compared with the case where the main mobile communication system collects communication traffic of each of a plurality of mobile communication systems, the radio channel control station of the main mobile communication system can have a simple configuration.
[0039]
Furthermore, in order to solve the above-mentioned problem, the radio network control method of the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station in the radio zone. A wireless channel control method for controlling a use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared, and each of the plurality of mobile communication systems The priority order regarding the use of the sharable frequency is defined, and the acquisition step of acquiring the communication traffic of the radio zone in one mobile communication system, and the communication traffic acquired in the acquisition step is a predetermined amount or more If the mobile communication system is the main mobile communication system, A request step for requesting use of the sharable frequency in the one mobile communication system, and a priority of the one mobile communication system uses the sharable frequency in response to a request in the request step. When the priority order is higher than that of another mobile communication system, the main mobile communication system stops radio communication using the sharable frequency in the other mobile communication system, and the radio wave having the sharable frequency is used. And a permission step for allowing the use of the sharable frequency to the one mobile communication system.
[0040]
In order to solve the above problems, the radio network control system according to the present invention is such that radio zones provided by radio base stations overlap each other, and radio communication between the radio base station and the mobile station is performed in the radio zone. A radio network control system for controlling a use state of the sharable frequency between each of a plurality of mobile communication systems in which frequencies that can be shared with each other are prepared, and each of the plurality of mobile communication systems A priority order for use of the sharable frequency is defined, provided in one mobile communication system, and acquiring means for acquiring communication traffic of the radio zone in the one mobile communication system; Communication traffic provided in the mobile communication system and acquired by the acquisition means above a predetermined amount In some cases, the requesting means for requesting the main mobile communication system to use the sharable frequency in the one mobile communication system, and the one mobile communication system provided in the main mobile communication system. When the priority of the one mobile communication system is higher than the priority of another mobile communication system using the shareable frequency in response to the request from the request means, the other mobile communication system A wireless communication device using the sharable frequency, stopping transmission of radio waves having the sharable frequency, and allowing means for allowing the use of the sharable frequency to the one mobile communication system; It is characterized by having prepared.
[0041]
In this case, a radio channel control station constituting the radio channel control system is provided in the one mobile communication system, an acquisition unit that acquires communication traffic in the radio zone in the one mobile communication system, and the acquisition unit When the communication traffic acquired by the mobile communication system is equal to or greater than a predetermined amount, a request means for requesting the main mobile communication system to use the sharable frequency in the one mobile communication system is provided. Yes.
[0042]
Further, another radio network controller constituting the radio network control system is provided in the main mobile communication system, and in response to a request for use of the sharable frequency from one mobile communication system, If the priority of the mobile communication system is higher than the priority of the other mobile communication system using the shareable frequency, the wireless communication using the shareable frequency in the other mobile communication system is stopped. And a transmission means for stopping the transmission of radio waves having the sharable frequency and allowing the use of the sharable frequency to the one mobile communication system.
[0043]
A frequency that can be shared among a plurality of mobile communication systems is prepared, and is shared from the one mobile communication system to the main mobile communication system when the communication traffic of one mobile communication system exceeds a predetermined amount. When the priority of the one mobile communication system is requested and the priority of the one mobile communication system is higher than the priority of the other mobile communication system using the shareable frequency, The wireless communication using the sharable frequency in the other mobile communication system is stopped, the transmission of the radio wave of the sharable frequency is stopped, and the use of the sharable frequency is allowed for the one mobile communication system. Therefore, the authority to use the sharable frequency is assigned to the above-mentioned one mobile communication system having a high priority and a relatively high communication traffic from the other mobile communication systems having a low priority. It can be transferred to the mobile communication system. Also, by requesting the use of a frequency that can be shared with other mobile communication systems via the main mobile communication system, compared to the case of requesting the use of frequencies that can be shared directly with other mobile communication systems. The radio network controller of mobile communication systems other than the main mobile communication system can have a simple configuration. On the other hand, compared with the case where the main mobile communication system collects the communication traffic of each of a plurality of mobile communication systems, the radio channel control station of the main mobile communication system can have a simple configuration.
[0044]
Further, in the wireless channel control method, when the wireless communication using the sharable frequency is stopped and the transmission of the radio wave of the sharable frequency is stopped, the call being communicated at the sharable frequency is not changed. It is preferable that the channel is switched to a channel having a frequency of and the transmission of radio waves having the frequency that can be shared is stopped after there is no call in communication at the frequency that can be shared.
[0045]
Further, in the radio network control system, when the radio communication using the sharable frequency is stopped and the transmission of the radio wave of the sharable frequency is stopped, the call being communicated at the sharable frequency is changed. It is preferable that the channel is switched to a channel having a frequency of and the transmission of radio waves having the frequency that can be shared is stopped after there is no call in communication at the frequency that can be shared.
[0046]
In this case, the radio network controller constituting the radio network control system stops the radio communication using the sharable frequency and stops the transmission of the radio wave having the sharable frequency. , The communication call is switched to a channel of another frequency, and the transmission of the radio wave of the sharable frequency is stopped after there is no communication call in the sharable frequency.
[0047]
When wireless communication using a sharable frequency is stopped and transmission of a radio wave having a sharable frequency is stopped, a call in communication at the sharable frequency may be forcibly disconnected. However, by switching the channel of a call that is in communication at a frequency that can be shared to another frequency channel and stopping the transmission of radio waves at the frequency that can be shared after there is no call in communication at the frequency that can be shared. The call in communication at the sharable frequency can continue communication.
[0048]
Further, in the radio network control method, a plurality of sharable frequencies are prepared, and when the use of the sharable frequencies is allowed, the number of calls in communication is small from the sharable frequencies. It is preferable that the frequency is preferentially allowed from the sharable frequency.
[0049]
In the radio network control system, a plurality of the sharable frequencies are prepared, and when the sharable frequency is allowed to be used, the number of calls in communication is small from the sharable frequencies. It is preferable that the frequency is preferentially allowed from the sharable frequency.
[0050]
In this case, when allowing the use of the sharable frequency, the radio network controller constituting the radio network control system can share the number of calls in communication from the plurality of sharable frequencies. It is characterized by preferentially allowing from the frequency.
[0051]
When allowing the use of a sharable frequency, it is possible to forcibly disconnect a call during communication by preferentially allowing a sharable frequency with a small number of calls in communication from among a plurality of sharable frequencies. The process of switching to another frequency channel can be reduced, and the process of stopping wireless communication using a sharable frequency is facilitated.
[0052]
Furthermore, in the radio channel control method, each of the plurality of mobile communication systems is characterized by preferentially allocating channels having frequencies that are not sharable with each other when allocating a channel to a call that has occurred. Is preferred.
[0053]
Further, in the radio network control system, each of the plurality of mobile communication systems is characterized by preferentially allocating a channel having a frequency that cannot be shared with each other when allocating a channel to a call that has occurred. Is preferred.
[0054]
In this case, the radio network controller constituting the radio network control system is characterized in that when allocating a channel to a call that has occurred, it is preferentially allocated from a channel having a frequency that cannot be shared with each other.
[0055]
When assigning a channel to a call that has occurred, the process of changing the use subject of the frequency that can be shared can be reduced by preferentially allocating the channel from a frequency that cannot be shared with each other.
[0056]
DETAILED DESCRIPTION OF THE INVENTION
(Mobile communication system using a radio network control system)
First, a mobile communication system using the radio network control system of the present invention will be described. FIG. 1 is a configuration diagram of a mobile communication system. The radio network control system according to the present invention is configured such that radio zones provided by radio base stations overlap with each other, and frequencies used for radio communication between the radio base station and the mobile station in the radio zone can be shared with each other (hereinafter referred to as frequencies). This is used to control the use state of the shared frequency among each of the plurality of mobile communication systems prepared for the shared frequency).
[0057]
More specifically, the radio network control system of the present invention is used, for example, to control the use state of the shared frequency between the mobile communication system A and the mobile communication system B shown in FIG. As shown in FIG. 1, the mobile communication system A is provided under a plurality of switching centers 10A, a radio channel control station 20A connected to each of the plurality of switching centers 10A, and a plurality of radio channel control stations 20A. And one or a plurality of radio base stations 30A.
[0058]
FIG. 2 is a configuration diagram of the radio network controller 20A. As shown in FIG. 2, the radio network controller 20A includes a control unit 22, an information storage unit 24, and a communication unit 26. The control unit 22 performs management of frequencies used for radio communication with the mobile station 40, channel assignment, and the like. The information storage unit 24 stores various information related to the mobile station 40, the radio base station 30A, the radio network controller 20A, various threshold values and timer values used in the radio network controller 20A. The communication unit 26 communicates with the exchange 10A and the radio base station 30A. Further, the control unit 22 can transmit / receive information to / from a radio channel control station of another mobile communication system (for example, the radio channel control station 20B of the mobile communication system B) directly or via the communication unit 26 and the switching center 10A. It is like that.
[0059]
FIG. 3 is a configuration diagram of the radio base station 30A. The radio base station 30A includes a control unit 32, an information storage unit 34, a communication unit 36, and a modem unit 38. The control unit 36 generates a signal to be transmitted to the radio network controller 20A, a signal to be transmitted to the mobile station 40, and the like. The information storage unit 34 stores various information related to the mobile station 40, the radio base station 30A, the radio network controller 20A, various threshold values and timer values used in the radio base station 30A. The communication unit 36 communicates with the radio network controller 20A and the mobile station 40. Here, when data is transmitted to the mobile station 40, the data output from the communication unit 36 is modulated by the modulation / demodulation unit 38 and then transmitted to the mobile station 40. The data transmitted from the station 40 is demodulated by the modem unit 38 and then input to the communication unit 36.
[0060]
Returning to FIG. 1, similarly to the mobile communication system A, the mobile communication system B also includes a plurality of switching centers 10B, a radio channel control station 20B connected to each of the plurality of switching centers 10B, and a plurality of radio channel control stations. And one or a plurality of radio base stations 30B provided under each of 20B. The radio network controller 20B has the same configuration as the radio network controller 20A described with reference to FIG. 2, and the radio base station 30B has the same configuration as the radio base station 30A described with reference to FIG. It has a configuration.
[0061]
At least a part of the service area of the mobile communication system A and the service area of the mobile communication system B overlap. More specifically, for example, at least a part of the radio zone of the radio base station 30A of the mobile communication system A and the radio zone of the radio base station 30B of the mobile communication system B overlap (see FIG. 1). Part AB) with dots. For each of the above radio zones, a shared frequency that can be shared by the mobile communication system A and the mobile communication system B is prepared.
[0062]
Here, as shown in FIG. 1, two mobile communication systems A and B have radio zones where they overlap each other as a mobile communication system in which the radio network control system of the present invention is used. The case where a shared frequency is prepared has been described as an example. This is because, for example, as shown in FIG. 4, three mobile communication systems A, B, M overlap each other in a wireless zone (dots in FIG. It may also be the case where a shared frequency is prepared for these radio zones. Similarly, it may be a case where four or more mobile communication systems have radio zones that overlap each other and a shared frequency is prepared for these radio zones.
[0063]
Further, here, as shown in FIG. 1, an example in which the radio zone of the radio base station 30A of the mobile communication system A and the radio zone of the radio base station 30B of the mobile communication system B overlap each other will be described. However, it does not exclude that the radio zones of the other radio base stations of the mobile communication system A and the radio zones of the other radio base stations of the mobile communication system B overlap each other.
[0064]
(Basic configuration)
The radio channel control method and radio channel control system according to the present invention basically includes radio zones provided by radio base stations that overlap each other, and radio communications between the radio base station and the mobile station in the radio zones. When the usage state of the shared frequency is controlled between each of a plurality of mobile communication systems for which a shared frequency is prepared for the frequency used for the radio frequency, the communication traffic of the wireless zone is acquired, and based on the acquired communication traffic It controls the usage status of the shared frequency. Hereinafter, various embodiments will be specifically described.
[0065]
(First embodiment)
A radio network control system according to a first embodiment of the present invention will be described with reference to the drawings. The radio network control system according to the present embodiment includes the radio network controller according to the embodiment of the present invention.
[0066]
As shown in FIG. 1, the radio network control system according to this embodiment has radio zones that overlap each other, and each of the two mobile communication systems A and B in which a shared frequency is prepared for these radio zones. In between, it is used to control the usage state of the shared frequency.
[0067]
First, the configuration of the radio network control system according to the present embodiment will be described. The radio network control system according to this embodiment includes a radio network controller 20A of the mobile communication system A and a radio network controller 20B of the mobile communication system B.
[0068]
The radio network controller 20A of the mobile communication system A basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20A further acquires a communication traffic of a radio zone provided by the radio base station 30A of the mobile communication system A, and the acquired communication traffic is a predetermined threshold value. In the case described above, the mobile communication system B using the shared frequency has a function of requesting the use of the shared frequency in the mobile communication system A.
[0069]
The radio network controller 20B of the mobile communication system B basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20B further uses a function of acquiring communication traffic in the radio zone provided by the radio base station 30B of the mobile communication system B and the use of the shared frequency from the mobile communication system A. In response to the request, when the acquired communication traffic is less than a predetermined threshold, the wireless communication using the shared frequency in the radio base station 30B of the mobile communication system B is stopped, and the transmission of the radio wave of the shared frequency is stopped. And has a function of allowing the mobile communication system A to use a shared frequency.
[0070]
Hereinafter, the operation of the radio network control system according to the present embodiment will be described in detail, and the radio network control method according to the embodiment of the present invention will be described. FIG. 5 is a flowchart showing the operation of the radio network control system according to the present embodiment.
[0071]
First, it is assumed that the radio network controller 20B of the mobile communication system B is using a shared frequency (hereinafter referred to as a shared frequency operating state). In this case, in order to prevent radio wave interference, the radio network controller 20A of the mobile communication system A is in a state where use of the shared frequency is prohibited (hereinafter referred to as a shared frequency operation prohibited state).
[0072]
In this state, in the radio network controller 20A of the mobile communication system A, the radio base station 30A subordinate to the radio network controller 20A provides at regular intervals, that is, whenever the communication traffic determination timer times out (S102). Communication traffic in the wireless zone is acquired (S104), and the communication traffic is compared with a threshold value (S106). Here, the timer value of the communication traffic determination timer and the threshold value are determined in advance and stored in the information storage unit 24 of the radio network controller 20A.
[0073]
As a result of comparing the communication traffic with the threshold value, if the communication traffic exceeds the threshold value, the radio channel of the mobile communication system B using the shared frequency is transmitted from the radio channel control station 20A of the mobile communication system A. A shared frequency operation inquiry requesting the use of the shared frequency in the mobile communication system A is transmitted to the control station 20B (S108). Here, information regarding the mobile communication system (here, mobile communication system B) using the shared frequency is acquired in advance and stored in the information storage unit 24 of the radio network controller 20A.
[0074]
In the radio network controller 20B of the mobile communication system B that has received the shared frequency operation inquiry, the communication traffic of the radio zone provided by the radio base station 30B under the radio network controller 20B is acquired, and the communication traffic is the threshold. It is compared with the value (S110). Here, the threshold value is determined in advance and stored in the information storage unit 24 of the radio network controller 20B.
[0075]
As a result of the comparison of the communication traffic with the threshold value, if the communication traffic is equal to or greater than the threshold value, as a response to the shared frequency operation inquiry, the radio communication system B of the mobile communication system B transmits the radio of the mobile communication system A A shared frequency operation inquiry response (impossible) indicating that the use of the shared frequency in the mobile communication system A is not permitted is transmitted to the line control station 20A (S112), and the process ends.
[0076]
On the other hand, when the communication traffic is smaller than the threshold value, wireless communication using the shared frequency in the radio base station 30B under the control of the radio network controller 20B of the mobile communication system B is stopped, and transmission of radio waves of the shared frequency is stopped. (S118). At this time, the radio network controller 20B of the mobile communication system B is in a shared frequency operation prohibited state.
[0077]
Here, when stopping the wireless communication using the shared frequency and stopping the transmission of the radio wave of the shared frequency, it is first determined whether or not there is a call in communication at the shared frequency (S114). When there is a call in communication at S, the channels are switched to channels of other frequencies (S116), and the transmission of radio waves at the shared frequency is stopped after there is no call in communication at the shared frequency. When the wireless communication using the shared frequency is stopped and the transmission of the radio wave of the shared frequency is stopped, it is conceivable that the call being communicated at the shared frequency is forcibly disconnected. However, as described above, the call being communicated at the shared frequency is channel-switched to a channel at another frequency, and the transmission of the radio wave at the shared frequency is stopped after there is no call in communication at the shared frequency. Calls in communication at the frequency can continue communication.
[0078]
When the radio base station 30B subordinate to the radio network controller 20B of the mobile communication system B stops the transmission of the radio signal of the shared frequency, the radio network controller 20B of the mobile communication system B receives a response to the above-mentioned shared frequency operation inquiry. A shared frequency operation inquiry response (permitted) that permits the use of the shared frequency is transmitted to the radio network controller 20A of the mobile communication system A (S120).
[0079]
Receiving the shared frequency operation inquiry response (possible), the radio network controller 20A of the mobile communication system A starts operating the shared frequency (S122). At this point, the radio network controller 20A of the mobile communication system A enters a shared frequency operating state.
[0080]
Next, the operation and effect of the radio network control system according to this embodiment will be described. The radio network control system according to the present embodiment prepares a shared frequency between the two mobile communication systems A and B, and uses the shared frequency when the communication traffic of the mobile communication system A is equal to or higher than a threshold value. If the mobile communication system B is requested to use a shared frequency, and the communication traffic of the mobile communication system B is less than the threshold value, the mobile communication system B stops the wireless communication using the shared frequency, and the shared frequency The mobile communication system A is allowed to use a shared frequency. Therefore, the authority to use the shared frequency can be transferred from the mobile communication system B having a relatively small communication traffic to the mobile communication system A having a relatively large communication traffic. As a result, it is possible to efficiently use the frequency when the mobile communication systems A and B coexist. Further, since the frequency can be used efficiently, the subscriber capacity of each of the mobile communication systems A and B can be increased.
[0081]
In the radio network control system according to the present embodiment, for convenience of explanation, the mobile communication system A is a mobile communication system that requires the use of a shared frequency, and the mobile communication system B is a mobile communication that allows the use of a shared frequency. Although described as a system, the radio network controller 20A of the mobile communication system A is given the function of the radio network controller 20B of the mobile communication system B, and the radio network controller 20B of the mobile communication system B By providing the function of the line control station 20A, each of the radio channel control station 20A of the mobile communication system A and the radio channel control station 20B of the mobile communication system B requests the use of the shared frequency, It becomes possible to be on either side that permits use.
[0082]
In addition, the radio network control system according to the present embodiment controls the use state of the shared frequency between the two mobile communication systems A and B. With the same configuration, three or more mobile communication systems are used. It is also possible to control the use state of the shared frequency between each system.
[0083]
(Second Embodiment)
A radio network control system according to a second embodiment of the present invention will be described with reference to the drawings. The radio network control system according to the present embodiment includes the radio network controller according to the embodiment of the present invention.
[0084]
As shown in FIG. 1, the radio network control system according to this embodiment has radio zones that overlap each other, and each of the two mobile communication systems A and B in which a shared frequency is prepared for these radio zones. In between, it is used to control the usage state of the shared frequency. In this case, the priority order regarding the use of the shared frequency is determined for each of the mobile communication systems A and B.
[0085]
First, the configuration of the radio network control system according to the present embodiment will be described. The radio network control system according to this embodiment includes a radio network controller 20A of the mobile communication system A and a radio network controller 20B of the mobile communication system B.
[0086]
The radio network controller 20A of the mobile communication system A basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20A further acquires a communication traffic of a radio zone provided by the radio base station 30A of the mobile communication system A, and the acquired communication traffic is a predetermined threshold value. In the case described above, the mobile communication system B using the shared frequency has a function of requesting the use of the shared frequency in the mobile communication system A.
[0087]
The radio network controller 20B of the mobile communication system B basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20B further uses a function of acquiring communication traffic in the radio zone provided by the radio base station 30B of the mobile communication system B and the use of the shared frequency from the mobile communication system A. Depending on the request, the priority of the mobile communication system A is higher than the priority of the mobile communication system B, or the priority of the mobile communication system A is equal to or lower than the priority of the mobile communication system B. If the communication traffic is less than the predetermined threshold value, the wireless communication using the shared frequency in the mobile communication system B is stopped, the transmission of the radio wave of the shared frequency is stopped, and the shared frequency for the mobile communication system A is stopped. And the function of allowing the use of
[0088]
Hereinafter, the operation of the radio network control system according to the present embodiment will be described in detail, and the radio network control method according to the embodiment of the present invention will be described. FIG. 6 is a flowchart showing the operation of the radio network control system according to the present embodiment.
[0089]
First, it is assumed that the radio network controller 20B of the mobile communication system B is in a shared frequency operating state. In this case, in order to prevent radio wave interference, the radio network controller 20A of the mobile communication system A is in a shared frequency operation prohibited state.
[0090]
In this state, in the radio network controller 20A of the mobile communication system A, the radio base station 30A subordinate to the radio network controller 20A provides at regular intervals, that is, whenever the communication traffic determination timer times out (S202). Communication traffic in the wireless zone is acquired (S204), and the communication traffic is compared with a threshold value (S206). Here, the timer value of the communication traffic determination timer and the threshold value are determined in advance and stored in the information storage unit 24 of the radio network controller 20A.
[0091]
As a result of comparing the communication traffic with the threshold value, if the communication traffic exceeds the threshold value, the radio channel of the mobile communication system B using the shared frequency is transmitted from the radio channel control station 20A of the mobile communication system A. A shared frequency operation inquiry requesting the use of the shared frequency in the mobile communication system A is transmitted to the control station 20B (S208). Here, information regarding the mobile communication system (here, mobile communication system B) using the shared frequency is acquired in advance and stored in the information storage unit 24 of the radio network controller 20A.
[0092]
In the radio network controller 20B of the mobile communication system B that has received the shared frequency operation inquiry, the priority of the mobile communication system A that is the transmission source of the shared frequency operation inquiry and the priority of the mobile communication system B that is in the shared frequency operation state. The rank is compared (S210). Here, the priorities are determined in advance and stored in the information storage unit 24 of the radio network controller 20B.
[0093]
If the priority order of the mobile communication system A is higher than the priority order of the mobile communication system B as a result of the comparison of the priority order of the mobile communication system A and the priority order of the mobile communication system B, the radio channel of the mobile communication system B Wireless communication using the shared frequency in the radio base station 30B under the control station 20B is stopped, and transmission of radio waves of the shared frequency is stopped (S216). At this time, the radio network controller 20B of the mobile communication system B is in a shared frequency operation prohibited state.
[0094]
Here, when stopping the wireless communication using the shared frequency and stopping the transmission of the radio wave of the shared frequency, it is first determined whether or not there is a call in communication at the shared frequency (S212). When there is a call in communication at S, the channels are switched to channels of other frequencies (S214), and the transmission of radio waves at the shared frequency is stopped after there is no call in communication at the shared frequency.
[0095]
When the radio base station 30B subordinate to the radio network controller 20B of the mobile communication system B stops the transmission of the radio signal of the shared frequency, the radio network controller 20B of the mobile communication system B receives a response to the above-mentioned shared frequency operation inquiry. A shared frequency operation inquiry response (permitted) to permit the use of the shared frequency is transmitted to the radio network controller 20A of the mobile communication system A (S218).
[0096]
Receiving the shared frequency operation inquiry response (possible), the radio network controller 20A of the mobile communication system A starts operating the shared frequency (S220). At this point, the radio network controller 20A of the mobile communication system A enters a shared frequency operating state.
[0097]
On the other hand, as a result of comparing the priority of the mobile communication system A and the priority of the mobile communication system B (S210), if the priority of the mobile communication system A is equal to or lower than the priority of the mobile communication system B, In the radio network controller 20B of the mobile communication system B that has received the shared frequency operation inquiry, communication traffic in the radio zone provided by the radio base station 30B under the radio network controller 20B is acquired, and the communication traffic is a threshold value. (S222). Here, the threshold value is determined in advance and stored in the information storage unit 24 of the radio network controller 20B.
[0098]
As a result of the comparison of the communication traffic with the threshold value, if the communication traffic is equal to or greater than the threshold value, as a response to the shared frequency operation inquiry, the radio communication system B of the mobile communication system B transmits the radio of the mobile communication system A A shared frequency operation inquiry response (impossible) indicating that the use of the shared frequency in the mobile communication system A is not permitted is transmitted to the line control station 20A (S224), and the process ends.
[0099]
On the other hand, if the communication traffic is smaller than the threshold value, it is determined whether there is a call in communication on the shared frequency (S212), as in the above-described process, and there is a call in communication on the shared frequency. In such a case, these calls are switched to another frequency channel (S214), and transmission of radio waves of the shared frequency is stopped after there is no communication call in the shared frequency (S216). When the transmission of the radio wave of the shared frequency is stopped, the shared frequency operation inquiry response (possible) is transmitted from the radio network controller 20B of the mobile communication system B to the radio network controller 20A of the mobile communication system A. (S218) The radio network controller 20A of the mobile communication system A starts operating the shared frequency (S220).
[0100]
Next, the operation and effect of the radio network control system according to this embodiment will be described. The radio network control system according to the present embodiment prepares a shared frequency between the two mobile communication systems A and B, and sets the shared frequency when the communication traffic of the mobile communication system A is equal to or higher than a predetermined threshold. When the mobile communication system B being used is requested to use a shared frequency, and the priority of the mobile communication system A is higher than the priority of the mobile communication system B, radio using the shared frequency in the mobile communication system B The communication is stopped, the transmission of the shared frequency radio wave is stopped, and the mobile communication system A is allowed to use the shared frequency. Accordingly, the authority to use the shared frequency can be transferred from the mobile communication system B having a low priority to the mobile communication system A having a high priority and relatively high communication traffic. As a result, it is possible to efficiently use the frequency when the mobile communication systems A and B coexist. Further, since the frequency can be used efficiently, the subscriber capacity of each of the mobile communication systems A and B can be increased. For example, when a mobile communication system for mainly performing voice communication and a mobile communication system for mainly performing data communication coexist, it is possible to improve efficiency by increasing the priority of the former where immediacy is required for call connection. It is possible to operate with good frequency.
[0101]
In the radio network control system according to this embodiment, even when the priority of the mobile communication system A is equal to or lower than the priority of the mobile communication system B, the communication traffic of the mobile communication system B is predetermined. If it is less than the threshold value, wireless communication using the shared frequency in the mobile communication system B is stopped, transmission of radio waves of the shared frequency is stopped, and the mobile communication system A is allowed to use the shared frequency. Accordingly, the authority to use the shared frequency can be transferred from the mobile communication system B having high priority but low communication traffic to the mobile communication system A having low priority but high communication traffic. As a result, it is possible to use the frequency more efficiently when the mobile communication systems A and B coexist.
[0102]
In the radio network control system according to the present embodiment, for convenience of explanation, the mobile communication system A is a mobile communication system that requires the use of a shared frequency, and the mobile communication system B is a mobile communication that allows the use of a shared frequency. Although described as a system, the radio network controller 20A of the mobile communication system A is given the function of the radio network controller 20B of the mobile communication system B, and the radio network controller 20B of the mobile communication system B By providing the function of the line control station 20A, each of the radio channel control station 20A of the mobile communication system A and the radio channel control station 20B of the mobile communication system B requests the use of the shared frequency, It becomes possible to be on either side that permits use.
[0103]
In addition, the radio network control system according to the present embodiment controls the use state of the shared frequency between the two mobile communication systems A and B. With the same configuration, three or more mobile communication systems are used. It is also possible to control the use state of the shared frequency between each system.
[0104]
(Third embodiment)
A radio network control system according to a third embodiment of the present invention will be described with reference to the drawings. The radio network control system according to the present embodiment includes the radio network controller according to the embodiment of the present invention.
[0105]
As shown in FIG. 4, the radio network control system according to the present embodiment includes three mobile communication systems A, B, and M that have radio zones that overlap each other and that have shared frequencies for these radio zones. In each case, it is used to control the usage state of the shared frequency. In this case, the mobile communication system M is a main mobile communication system.
[0106]
First, the configuration of the wireless line control system according to the present embodiment will be described. The radio network control system according to this embodiment includes a radio network controller 20A of the mobile communication system A, a radio network controller 20B of the mobile communication system B, and a radio network controller 20M of the mobile communication system M. Is done.
[0107]
The radio network controller 20A of the mobile communication system A basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20A further acquires the communication traffic of the radio zone provided by the radio base station 30A under the control of the radio network controller 20A of the mobile communication system A, and It has a function of notifying communication traffic to the main mobile communication system M.
[0108]
The radio network controller 20B of the mobile communication system B basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20B further acquires the communication traffic of the radio zone provided by the radio base station 30B subordinate to the radio network controller 20B of the mobile communication system B, and the acquired function. It has a function of notifying communication traffic to the main mobile communication system M.
[0109]
The radio network controller 20M of the mobile communication system M basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20M further has the largest communication traffic based on the communication traffic in the radio zone in each of the mobile communication systems A and B notified from the mobile communication systems A and B, respectively. When a mobile communication system is extracted and the mobile communication system having the largest communication traffic is different from the mobile communication system using the shared frequency, the wireless communication using the shared frequency in the mobile communication system using the shared frequency is performed. It has a function of stopping the transmission of the radio wave of the common frequency and allowing the use of the common frequency to the mobile communication system having the largest communication traffic.
[0110]
Hereinafter, the operation of the radio network control system according to the present embodiment will be described in detail, and the radio network control method according to the embodiment of the present invention will be described. FIG. 7 is a flowchart showing the operation of the radio network control system according to this embodiment.
[0111]
First, it is assumed that the radio network controller 20B of the mobile communication system B is in a shared frequency operating state. In this case, in order to prevent radio wave interference, the radio network controller 20A of the mobile communication system A and the radio network controller 20M of the mobile communication system M are in a shared frequency operation prohibited state.
[0112]
In this state, in the radio network controller 20M of the main mobile communication system M, the radio base station 30M under the control of the radio network controller 20M at regular intervals, that is, whenever the communication traffic determination timer times out (S302). The communication traffic of the wireless zone provided by is acquired (S304). Here, the timer value of the communication traffic determination timer is determined in advance and stored in the information storage unit 24 of the radio network controller 20M.
[0113]
Further, in the radio network controller 20A of the mobile communication system A, a radio zone provided by the radio base station 30A subordinate to the radio network controller 20A at regular intervals, that is, whenever the communication traffic determination timer times out (S306). Communication traffic is acquired (S308). Here, the timer value of the communication traffic determination timer is determined in advance and stored in the information storage unit 24 of the radio network controller 20A. The acquired communication traffic is notified to the radio network controller 20M of the mobile communication system M serving as the main trunk (S310).
[0114]
Similarly, in the radio network controller 20B of the mobile communication system B, the radio provided by the radio base station 30B subordinate to the radio network controller 20B at regular intervals, that is, whenever the communication traffic determination timer times out (S312). The communication traffic of the zone is acquired (S314). Here, the timer value of the communication traffic determination timer is determined in advance and stored in the information storage unit 24 of the radio network controller 20B. Further, the acquired communication traffic is notified to the radio network controller 20M of the mobile communication system M serving as the main trunk (S316).
[0115]
Here, the timer values of the communication traffic determination timers used in the radio network controller 20M of the mobile communication system M, the radio network controller 20A of the mobile communication system A, and the radio network controller 20B of the mobile communication system B are different. However, the same value is preferable. Further, the time-up of the communication traffic determination timer in each of the radio network controller 20M of the mobile communication system M, the radio network controller 20A of the mobile communication system A, and the radio network controller 20B of the mobile communication system B is synchronized. Preferably it is.
[0116]
In the main mobile communication system M, communication traffic in the radio zone in each of the mobile communication systems A and B notified from the mobile communication systems A and B, and communication in the radio zone in the mobile communication system M acquired by itself. With reference to the traffic, the mobile communication system with the largest communication traffic is extracted from the mobile communication systems A, B, and M (S318). Extraction of the mobile communication system with the largest communication traffic may be performed periodically or irregularly in response to some trigger.
[0117]
Here, when the mobile communication system having the largest communication traffic (here, the mobile communication system A) and the mobile communication system using the shared frequency (here, the mobile communication system B) are different, the main mobile communication system M The radio network controller 20M stops the radio communication using the shared frequency in the mobile communication system B using the shared frequency, stops the transmission of the radio wave of the shared frequency, and the mobile communication system A having the largest communication traffic. Allows the use of a shared frequency. Here, information regarding the mobile communication system (here, mobile communication system B) using the shared frequency is acquired in advance and stored in the information storage unit 24 of the radio network controller 20M.
[0118]
Specifically, first, a shared frequency operation prohibition notification that the operation of the shared frequency should be stopped is transmitted from the radio network controller 20M of the mobile communication system M to the mobile communication system B using the shared frequency. (S320).
[0119]
The radio network controller 20B of the mobile communication system B that has received the shared frequency operation prohibition notification determines whether or not there is a call in communication on the shared frequency (S322), and there is a call in communication on the shared frequency. In this case, these calls are switched to another frequency channel (S324), and after there are no calls in communication on the shared frequency, transmission of radio waves at the shared frequency is stopped (S326). At this time, the radio network controller 20B of the mobile communication system B is in a shared frequency operation prohibited state.
[0120]
When transmission of radio waves of the shared frequency is stopped in the radio base station 30B under the control of the radio network controller 20B of the mobile communication system B, the radio network controller 20B of the mobile communication system B to the radio network controller of the mobile communication system M A shared frequency operation prohibition notification confirmation indicating that the use of the shared frequency is stopped is transmitted to 20M (S328).
[0121]
The radio network controller 20M of the mobile communication system M that has received the shared frequency operation prohibition notification confirmation allows the radio network controller 20A of the mobile communication system A having the largest communication traffic to permit the use of the shared frequency. An operational notification is transmitted (S330).
[0122]
In response to this, the radio network controller 20A of the mobile communication system A that has received the shared frequency operational notification transmits a shared frequency operational notification confirmation to the radio network controller 20M of the mobile communication system M (S332). At the same time, the operation of the shared frequency is started (S334). At this point, the radio network controller 20A of the mobile communication system A enters a shared frequency operating state.
[0123]
Next, the operation and effect of the radio network control system according to this embodiment will be described. In the radio network control system according to the present embodiment, a shared frequency is prepared between the three mobile communication systems A, B, and M, and the communication traffic of each of the mobile communication systems A and B is used as the main mobile communication system M. If the mobile communication system (for example, mobile communication system A) having the largest communication traffic is different from the mobile communication system using the shared frequency (for example, mobile communication system B), In a mobile communication system (for example, mobile communication system B) using a shared frequency, wireless communication using the shared frequency is stopped, transmission of radio waves having a frequency that can be shared is stopped, and the mobile communication system having the largest communication traffic The use of a shared frequency is allowed for (for example, mobile communication system A). Therefore, the authority to use the shared frequency can be transferred to the mobile communication system having the largest communication traffic. As a result, when the mobile communication systems A, B, and M coexist, it becomes possible to use the frequency efficiently. Further, since the frequency can be used efficiently, the subscriber capacity of each of the mobile communication systems A, B, and M can be increased.
[0124]
In the radio network control system according to the present embodiment, the mobile communication systems A and B other than the main mobile communication system M even notify the main mobile communication system M of the communication traffic of the own mobile communication system. The configuration of the radio network controllers 20A and 20B can be simplified.
[0125]
In the radio network control system according to the present embodiment, for convenience of explanation, the mobile communication system A is a mobile communication system in which the use of a shared frequency is allowed, and the mobile communication system B is a mobile communication system in which the use of a shared frequency is prohibited. Although described, this relationship may be reversed.
[0126]
The radio network control system according to the present embodiment controls the use state of the shared frequency between the main mobile communication system M and the other two mobile communication systems A and B. Accordingly, it is also possible to control the use state of the shared frequency between the mobile communication system M serving as the main and each of the other three or more mobile communication systems.
[0127]
(Fourth embodiment)
A radio network control system according to a fourth embodiment of the present invention will be described with reference to the drawings. The radio network control system according to the present embodiment includes the radio network controller according to the embodiment of the present invention.
[0128]
As shown in FIG. 4, the radio network control system according to the present embodiment includes three mobile communication systems A, B, and M that have radio zones that overlap each other and that have shared frequencies for these radio zones. In each case, it is used to control the usage state of the shared frequency. In this case, the mobile communication system M is the main mobile communication system. Further, for each of the mobile communication systems A, B, and M, a priority order regarding the use of the shared frequency is determined. Further, for each of the mobile communication systems A, B, and M, threshold values relating to communication traffic are set.
[0129]
First, the configuration of the radio network control system according to the present embodiment will be described. The radio network control system according to this embodiment includes a radio network controller 20A of the mobile communication system A, a radio network controller 20B of the mobile communication system B, and a radio network controller 20M of the mobile communication system M. Is done.
[0130]
The radio network controller 20A of the mobile communication system A basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20A further acquires the communication traffic of the radio zone provided by the radio base station 30A under the control of the radio network controller 20A of the mobile communication system A, and It has a function of notifying communication traffic to the main mobile communication system M.
[0131]
The radio network controller 20B of the mobile communication system B basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20B further acquires the communication traffic of the radio zone provided by the radio base station 30B subordinate to the radio network controller 20B of the mobile communication system B, and the acquired function. It has a function of notifying communication traffic to the main mobile communication system M.
[0132]
The radio network controller 20M of the mobile communication system M basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20M further determines communication traffic in advance based on the communication traffic in the radio zone in each of the mobile communication systems A and B notified from the mobile communication systems A and B, respectively. The mobile communication system that is equal to or higher than the threshold value is extracted, the mobile communication system with the highest priority is extracted from the extracted mobile communication systems, and the mobile communication system with the highest priority and the shared frequency are extracted. If the mobile communication system used is different, stop the wireless communication using the shared frequency in the mobile communication system using the shared frequency, stop sending the radio wave of the shared frequency, and move with the highest priority. The communication system has a function that allows the use of a shared frequency.
[0133]
Hereinafter, the operation of the radio network control system according to the present embodiment will be described in detail, and the radio network control method according to the embodiment of the present invention will be described. FIG. 8 is a flowchart showing the operation of the radio network control system according to the present embodiment.
[0134]
First, it is assumed that the radio network controller 20B of the mobile communication system B is in a shared frequency operating state. In this case, in order to prevent radio wave interference, the radio network controller 20A of the mobile communication system A and the radio network controller 20M of the mobile communication system M are in a shared frequency operation prohibited state.
[0135]
In this state, in the radio network controller 20M of the main mobile communication system M, the radio base station 30M under the control of the radio network controller 20M at regular intervals, that is, whenever the communication traffic determination timer times out (S402). The communication traffic of the wireless zone provided by is acquired (S404). Here, the timer value of the communication traffic determination timer is determined in advance and stored in the information storage unit 24 of the radio network controller 20M.
[0136]
Further, in the radio network controller 20A of the mobile communication system A, a radio zone provided by the radio base station 30A subordinate to the radio network controller 20A at regular intervals, that is, whenever the communication traffic determination timer times out (S406). Communication traffic is acquired (S408). Here, the timer value of the communication traffic determination timer is determined in advance and stored in the information storage unit 24 of the radio network controller 20A. Further, the acquired communication traffic is notified to the radio network controller 20M of the mobile communication system M serving as the main trunk (S410).
[0137]
Similarly, in the radio network controller 20B of the mobile communication system B, the radio provided by the radio base station 30B subordinate to the radio network controller 20B at regular intervals, that is, whenever the communication traffic determination timer times out (S412). The communication traffic of the zone is acquired (S414). Here, the timer value of the communication traffic determination timer is determined in advance and stored in the information storage unit 24 of the radio network controller 20B. Further, the acquired communication traffic is notified to the radio network controller 20M of the mobile communication system M serving as the main trunk (S416).
[0138]
Here, the timer values of the communication traffic determination timers used in the radio network controller 20M of the mobile communication system M, the radio network controller 20A of the mobile communication system A, and the radio network controller 20B of the mobile communication system B are different. However, the same value is preferable. Further, the time-up of the communication traffic determination timer in each of the radio network controller 20M of the mobile communication system M, the radio network controller 20A of the mobile communication system A, and the radio network controller 20B of the mobile communication system B is synchronized. Preferably it is.
[0139]
In the main mobile communication system M, communication traffic in the radio zone in each of the mobile communication systems A and B notified from the mobile communication systems A and B, and communication in the radio zone in the mobile communication system M acquired by itself. With reference to the traffic, a mobile communication system in which the communication traffic is equal to or greater than a predetermined threshold is extracted (S418). This threshold value may be a value set in common for all of the plurality of mobile communication systems, or may be a value set individually for each of the plurality of mobile communication systems. This threshold value is stored in the information storage unit 24 of the radio network controller 20M of the mobile communication system M. Here, it is assumed that the mobile communication system A and the mobile communication system B are extracted.
[0140]
Subsequently, in the mobile communication system M as the main trunk, the mobile communication system having the highest priority is extracted from the mobile communication systems extracted as described above (S420). Here, it is assumed that the priorities are in the order of the mobile communication system A, the mobile communication system B, and the mobile communication system M, and as a result, the mobile communication system A is extracted.
[0141]
Here, when the mobile communication system with the highest priority (here, the mobile communication system A) and the mobile communication system using the shared frequency (here, the mobile communication system B) are different from each other, the main mobile communication system M The radio network controller 20M stops the radio communication using the shared frequency in the mobile communication system B using the shared frequency, stops the transmission of the radio wave of the shared frequency, and the mobile communication system A having the highest priority. Allows the use of a shared frequency. Here, information regarding the mobile communication system (here, mobile communication system B) using the shared frequency is acquired in advance and stored in the information storage unit 24 of the radio network controller 20M.
[0142]
Specifically, first, a shared frequency operation prohibition notification that the operation of the shared frequency should be stopped is transmitted from the radio network controller 20M of the mobile communication system M to the mobile communication system B using the shared frequency. (S422).
[0143]
The radio network controller 20B of the mobile communication system B that has received the shared frequency operation prohibition notification determines whether or not there is a call in communication on the shared frequency (S424), and there is a call in communication on the shared frequency. If so, these calls are switched to another frequency channel (S426), and after there are no calls in communication on the shared frequency, transmission of radio waves of the shared frequency is stopped (S428). At this time, the radio network controller 20B of the mobile communication system B is in a shared frequency operation prohibited state.
[0144]
When transmission of radio waves of the shared frequency is stopped in the radio base station 30B under the control of the radio network controller 20B of the mobile communication system B, the radio network controller 20B of the mobile communication system B to the radio network controller of the mobile communication system M A shared frequency operation prohibition notification confirmation indicating that the use of the shared frequency is stopped is transmitted to 20M (S430).
[0145]
The radio network controller 20M of the mobile communication system M that has received the shared frequency operation prohibition notice confirmation allows the radio network controller 20A of the mobile communication system A having the highest priority to permit the use of the shared frequency. An operational notification is transmitted (S432).
[0146]
The radio network controller 20A of the mobile communication system A that has received the shared frequency operational notification transmits a shared frequency operational notification confirmation to the radio network controller 20M of the mobile communication system M as a response thereto (S434). At the same time, the operation of the shared frequency is started (S436). At this point, the radio network controller 20A of the mobile communication system A enters a shared frequency operating state.
[0147]
Next, the operation and effect of the radio network control system according to this embodiment will be described. In the radio network control system according to the present embodiment, a shared frequency is prepared between the three mobile communication systems A, B, and M, and the communication traffic of each of the mobile communication systems A and B is used as the main mobile communication system M. If the mobile communication system having the highest priority among the mobile communication systems (for example, the mobile communication system A) and the mobile communication system using the shared frequency are different from each other, the main traffic The mobile communication system M to be used stops the wireless communication using the shared frequency in the mobile communication system (for example, the mobile communication system B) using the shared frequency, stops the transmission of radio waves of the sharable frequency, and performs communication. Among the mobile communication systems in which the traffic exceeds the threshold value, the mobile communication system with the highest priority (for example, mobile communication system) Allowing use of the shared frequency for beam A). Therefore, the authority to use the shared frequency can be transferred to the mobile communication system with the highest priority among the mobile communication systems in which the communication traffic is equal to or higher than the threshold value. As a result, when the mobile communication systems A, B, and M coexist, it becomes possible to use the frequency efficiently. Further, since the frequency can be used efficiently, the subscriber capacity of each of the mobile communication systems A, B, and M can be increased.
[0148]
In the radio network control system according to the present embodiment, the mobile communication systems A and B other than the main mobile communication system M even notify the main mobile communication system M of the communication traffic of the own mobile communication system. The configuration of the radio network controllers 20A and 20B can be simplified.
[0149]
In the radio network control system according to the present embodiment, for convenience of explanation, the mobile communication system A is a mobile communication system in which the use of a shared frequency is allowed, and the mobile communication system B is a mobile communication system in which the use of a shared frequency is prohibited. Although described, this relationship may be reversed.
[0150]
The radio network control system according to the present embodiment controls the use state of the shared frequency between the main mobile communication system M and the other two mobile communication systems A and B. Accordingly, it is also possible to control the use state of the shared frequency between the mobile communication system M serving as the main and each of the other three or more mobile communication systems.
[0151]
(Fifth embodiment)
A radio network control system according to a fifth embodiment of the present invention will be described with reference to the drawings. The radio network control system according to the present embodiment includes the radio network controller according to the embodiment of the present invention.
[0152]
As shown in FIG. 4, the radio network control system according to the present embodiment includes three mobile communication systems A, B, and M that have radio zones that overlap each other and that have shared frequencies for these radio zones. In each case, it is used to control the usage state of the shared frequency. In this case, the mobile communication system M is the main mobile communication system.
[0153]
First, the configuration of the radio network control system according to the present embodiment will be described. The radio network control system according to this embodiment includes a radio network controller 20A of the mobile communication system A, a radio network controller 20B of the mobile communication system B, and a radio network controller 20M of the mobile communication system M. Is done.
[0154]
The radio network controller 20A of the mobile communication system A basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20A further acquires a communication traffic of a radio zone provided by the radio base station 30A under the control of the radio network controller 20A, and the acquired communication traffic is predetermined. When it is equal to or greater than the threshold value, the mobile communication system M serving as a trunk has a function of requesting use of a shared frequency in the mobile communication system A.
[0155]
The radio network controller 20M of the mobile communication system M basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20M further responds to the mobile communication system using the shared frequency in response to a request for using the shared frequency from the mobile communication system not using the shared frequency. It has a function of requesting the use of a shared frequency in a mobile communication system that does not use the shared frequency.
[0156]
The radio network controller 20B of the mobile communication system B basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20B further acquires the communication traffic of the radio zone provided by the radio base station 30B under the control of the radio network controller 20B, and the main mobile communication system M. In response to a request for using a shared frequency in another mobile communication system to be transmitted, if the communication traffic acquired as described above is less than a predetermined threshold, wireless communication using the shared frequency in the mobile communication system B is performed. A function of stopping the transmission of the radio wave of the shared frequency and allowing the use of the shared frequency to other mobile communication systems.
[0157]
Hereinafter, the operation of the radio network control system according to the present embodiment will be described in detail, and the radio network control method according to the embodiment of the present invention will be described. FIG. 9 is a flowchart showing the operation of the radio network control system according to the present embodiment.
[0158]
First, it is assumed that the radio network controller 20B of the mobile communication system B is in a shared frequency operating state. In this case, in order to prevent radio wave interference, the radio network controller 20A of the mobile communication system A and the radio network controller 20M of the mobile communication system M are in a shared frequency operation prohibited state.
[0159]
In this state, in the radio network controller 20A of the mobile communication system A, the radio base station 30A subordinate to the radio network controller 20A provides at regular intervals, that is, whenever the communication traffic determination timer times out (S502). Communication traffic in the wireless zone is acquired (S504), and the communication traffic is compared with a threshold value (S506). Here, the timer value of the communication traffic determination timer and the threshold value are determined in advance and stored in the information storage unit 24 of the radio network controller 20A.
[0160]
As a result of the comparison of the communication traffic with the threshold value, if the communication traffic exceeds the threshold value, the radio network controller 20A of the mobile communication system A changes to the radio network controller 20M of the main mobile communication system M. On the other hand, a shared frequency operation request for requesting use of the shared frequency in the mobile communication system A is transmitted (S508).
[0161]
When the shared frequency operation request is received by the radio network controller 20M of the main mobile communication system M, the mobile communication system B using the shared frequency from the radio network controller 20M of the main mobile communication system M. A shared frequency operation inquiry requesting the use of the shared frequency is transmitted to the radio network controller 20B (S510). Here, information regarding the mobile communication system (here, mobile communication system B) using the shared frequency is acquired in advance and stored in the information storage unit 24 of the radio network controller 20M.
[0162]
In the radio network controller 20B of the mobile communication system B that has received the shared frequency operation inquiry, the communication traffic of the radio zone provided by the radio base station 30B under the radio network controller 20B is acquired, and the communication traffic is the threshold. The value is compared (S512). Here, the threshold value is determined in advance and stored in the information storage unit 24 of the radio network controller 20B.
[0163]
As a result of comparing the communication traffic with the threshold value, if the communication traffic is equal to or greater than the threshold value, the mobile communication system serving as a master from the radio network controller 20B of the mobile communication system B is used as a response to the shared frequency operation inquiry. A shared frequency operation inquiry response (impossible) indicating that the use of the shared frequency is not permitted is transmitted to the M radio network controller 20M (S514), and the main movement as a response to the shared frequency operation request is transmitted. A shared frequency operation response (impossible) indicating that the use of the shared frequency in the mobile communication system A is not permitted is transmitted from the radio network controller 20M of the communication system M to the radio network controller 20A of the mobile communication system A (S516). ), The process ends.
[0164]
On the other hand, if the communication traffic is smaller than the threshold value, the radio network controller 20B of the mobile communication system B determines whether there is a call in communication on the shared frequency (S518), and is communicating on the shared frequency. Are switched to channels of other frequencies (S520), and transmission of radio waves of the shared frequency is stopped after there are no calls in communication on the shared frequency (S522). At this time, the radio network controller 20B of the mobile communication system B is in a shared frequency operation prohibited state.
[0165]
When the radio base station 30B subordinate to the radio network controller 20B of the mobile communication system B stops the transmission of the radio signal of the shared frequency, the radio network controller 20B of the mobile communication system B receives a response to the above-mentioned shared frequency operation inquiry. A shared frequency operation inquiry response (permitted) that permits the use of the shared frequency is transmitted to the radio network controller 20M of the mobile communication system M serving as the trunk (S524) and a response to the shared frequency operation request As described above, a shared frequency operation response (permitted to permit use of a shared frequency in the mobile communication system A) from the radio network controller 20M of the mobile communication system M to the radio network controller 20A of the mobile communication system A. ) Is transmitted (S526)
[0166]
Receiving the shared frequency operation response (possible), the radio network controller 20A of the mobile communication system A starts operating the shared frequency (S528). At this point, the radio network controller 20A of the mobile communication system A enters a shared frequency operating state.
[0167]
Next, the operation and effect of the radio network control system according to this embodiment will be described. The radio network control system according to the present embodiment prepares a shared frequency among the three mobile communication systems A, B, and M, and moves when the communication traffic of the mobile communication system A is equal to or higher than a predetermined threshold value. The communication system A requests the use of the shared frequency to the main mobile communication system M, and further requests the use of the common frequency from the main mobile communication system M to the mobile communication system B using the shared frequency. When the communication traffic of the communication system B is less than a predetermined threshold, the wireless communication using the shared frequency in the mobile communication system B is stopped, the transmission of radio waves of the shared frequency is stopped, and the mobile communication system A is stopped. Allow use of shared frequency. Therefore, the authority to use the shared frequency can be transferred from the mobile communication system B having a relatively small communication traffic to the mobile communication system A having a relatively large communication traffic. As a result, when the mobile communication systems A, B, and M coexist, it becomes possible to use the frequency efficiently. Further, since the frequency can be used efficiently, the subscriber capacity of each of the mobile communication systems A, B, and M can be increased.
[0168]
The radio network control system according to the present embodiment can be directly shared with other mobile communication systems by requesting the use of frequencies that can be shared with other mobile communication systems via the main mobile communication system M. Compared to a case where the use of a different frequency is required, the radio channel control station of the mobile communication system other than the main mobile communication system M can be simplified. On the other hand, compared with the case where the main mobile communication system M collects the communication traffic of each of a plurality of mobile communication systems, the radio channel control station of the main mobile communication system M can be simplified. Also, it is possible to reduce the amount of data transmitted / received between the main mobile communication system M and another mobile communication system.
[0169]
In the radio network control system according to the present embodiment, for convenience of explanation, the mobile communication system A is a mobile communication system that requires the use of a shared frequency, and the mobile communication system B is a mobile communication that allows the use of a shared frequency. Although described as a system, the radio network controller 20A of the mobile communication system A is given the function of the radio network controller 20B of the mobile communication system B, and the radio network controller 20B of the mobile communication system B By providing the function of the line control station 20A, each of the radio channel control station 20A of the mobile communication system A and the radio channel control station 20B of the mobile communication system B requests the use of the shared frequency, It becomes possible to be on either side that permits use.
[0170]
The radio network control system according to the present embodiment controls the use state of the shared frequency between the main mobile communication system M and the other two mobile communication systems A and B. With this configuration, it is possible to control the use state of the shared frequency between the main mobile communication system M and each of the other three or more mobile communication systems.
[0171]
(Sixth embodiment)
A radio network control system according to a sixth embodiment of the present invention will be described with reference to the drawings. The radio network control system according to the present embodiment includes the radio network controller according to the embodiment of the present invention.
[0172]
As shown in FIG. 4, the radio network control system according to the present embodiment includes three mobile communication systems A, B, and M that have radio zones that overlap each other and that have shared frequencies for these radio zones. In each case, it is used to control the usage state of the shared frequency. In this case, the mobile communication system M is the main mobile communication system. In addition, for each of the mobile communication systems A, B, and M, a priority order regarding use of the shared frequency is determined.
[0173]
First, the configuration of the radio network control system according to the present embodiment will be described. The radio network control system according to this embodiment includes a radio network controller 20A of the mobile communication system A, a radio network controller 20B of the mobile communication system B, and a radio network controller 20M of the mobile communication system M. Is done.
[0174]
The radio network controller 20A of the mobile communication system A basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20A further acquires a communication traffic of a radio zone provided by the radio base station 30A under the control of the radio network controller 20A, and the acquired communication traffic is predetermined. When it is equal to or greater than the threshold value, the mobile communication system M serving as a trunk has a function of requesting use of a shared frequency in the mobile communication system A.
[0175]
The radio network controller 20B of the mobile communication system B basically has the configuration already described with reference to FIG.
[0176]
The radio network controller 20M of the mobile communication system M basically has the configuration already described with reference to FIG. Here, the control unit 22 of the radio network controller 20M further determines that the priority of the requesting mobile communication system determines the shared frequency in response to a request for using the shared frequency from a mobile communication system that does not use the shared frequency. If the priority is higher than the priority of the mobile communication system being used, the wireless communication using the shared frequency in the mobile communication system using the shared frequency is stopped, the radio wave transmission of the shared frequency is stopped, and the request source The mobile communication system has a function that allows the use of a shared frequency.
[0177]
Hereinafter, the operation of the radio network control system according to the present embodiment will be described in detail, and the radio network control method according to the embodiment of the present invention will be described. FIG. 10 is a flowchart showing the operation of the radio network control system according to this embodiment.
[0178]
First, it is assumed that the radio network controller 20B of the mobile communication system B is in a shared frequency operating state. In this case, in order to prevent radio wave interference, the radio network controller 20A of the mobile communication system A and the radio network controller 20M of the mobile communication system M are in a shared frequency operation prohibited state.
[0179]
In this state, in the radio network controller 20A of the mobile communication system A, the radio base station 30A subordinate to the radio network controller 20A provides at regular intervals, that is, whenever the communication traffic determination timer times out (S602). Communication traffic in the wireless zone is acquired (S604), and the communication traffic is compared with a threshold value (S606). Here, the timer value of the communication traffic determination timer and the threshold value are determined in advance and stored in the information storage unit 24 of the radio network controller 20A.
[0180]
As a result of the comparison of the communication traffic with the threshold value, if the communication traffic exceeds the threshold value, the radio network controller 20A of the mobile communication system A changes to the radio network controller 20M of the main mobile communication system M. On the other hand, a shared frequency operation request for requesting use of the shared frequency in the mobile communication system A is transmitted (S608).
[0181]
When the shared frequency operation request is received by the radio network controller 20M of the main mobile communication system M, the priority of the mobile communication system A that requests the use of the shared frequency and the mobile communication system B that uses the shared frequency Are compared with each other (S610). When the priority of the mobile communication system A that requires the use of the shared frequency is equal to or lower than the priority of the mobile communication system B that uses the shared frequency, the main mobile as a response to the shared frequency operation request A shared frequency operation response (impossible) indicating that the use of the shared frequency in the mobile communication system A is not permitted is transmitted from the radio network controller 20M of the communication system M to the radio network controller 20A of the mobile communication system A (S612). ), The process ends. Here, information regarding the mobile communication system (here, mobile communication system B) using the shared frequency is acquired in advance and stored in the information storage unit 24 of the radio network controller 20M.
[0182]
On the other hand, when the priority of the mobile communication system A that requires the use of the shared frequency is higher than the priority of the mobile communication system B that uses the shared frequency, the radio network controller 20M of the main mobile communication system M A shared frequency operation prohibition notification that the operation of the shared frequency should be stopped is transmitted to the radio network controller 20B of the mobile communication system B that uses the shared frequency (S614).
[0183]
The radio network controller 20B of the mobile communication system B that has received the shared frequency operation prohibition notification determines whether or not there is a call in communication on the shared frequency (S616), and there is a call in communication on the shared frequency. If so, these calls are switched to another frequency channel (S618), and after there are no calls in communication on the shared frequency, transmission of radio waves of the shared frequency is stopped (S620). At this time, the radio network controller 20B of the mobile communication system B is in a shared frequency operation prohibited state.
[0184]
When the radio base station 30B under the control of the radio network controller 20B of the mobile communication system B stops the transmission of the radio wave of the shared frequency, the radio of the mobile communication system M serving as the master from the radio network controller 20B of the mobile communication system B A shared frequency operation prohibition completion notification indicating that the use of the shared frequency is stopped is transmitted to the line control station 20M (S622).
[0185]
The radio network controller 20M of the mobile communication system M that has received the shared frequency operation prohibition completion notice allows the radio network controller 20A of the mobile communication system A to use the shared frequency as a response to the shared frequency operation request. A shared frequency operation response (Yes) is transmitted (S624).
[0186]
Receiving the shared frequency operation response (possible), the radio network controller 20A of the mobile communication system A starts operating the shared frequency (S626). At this point, the radio network controller 20A of the mobile communication system A enters a shared frequency operating state.
[0187]
Next, the operation and effect of the radio network control system according to this embodiment will be described. The radio network control system according to the present embodiment prepares a shared frequency among the three mobile communication systems A, B, and M, and moves when the communication traffic of the mobile communication system A is equal to or higher than a predetermined threshold value. When the communication system A requests the main mobile communication system M to use a shared frequency, and the priority of the mobile communication system A is higher than the priority of the mobile communication system B using the shared frequency, The main mobile communication system M stops the radio communication using the shared frequency in the mobile communication system B, stops the transmission of radio waves of the shared frequency, and allows the mobile communication system A to use the shared frequency. Accordingly, the authority to use the shared frequency can be transferred from the mobile communication system B having a low priority to the mobile communication system A having a high priority and a relatively large communication traffic. As a result, when the mobile communication systems A, B, and M coexist, it becomes possible to use the frequency efficiently. Further, since the frequency can be used efficiently, the subscriber capacity of each of the mobile communication systems A, B, and M can be increased.
[0188]
The radio network control system according to the present embodiment can be directly shared with other mobile communication systems by requesting the use of frequencies that can be shared with other mobile communication systems via the main mobile communication system M. Compared to a case where the use of a different frequency is required, it is possible to make the radio channel control station of a mobile communication system other than the main mobile communication system M simpler. On the other hand, compared with the case where the main mobile communication system M collects the communication traffic of each of a plurality of mobile communication systems, the radio channel control station of the main mobile communication system M can be simplified. In addition, it is possible to reduce the amount of data transmitted / received between the main mobile communication system M and another mobile communication system.
[0189]
In the radio network control system according to the present embodiment, for convenience of explanation, the mobile communication system A is a mobile communication system that requires the use of a shared frequency, and the mobile communication system B is a mobile communication that allows the use of a shared frequency. Although described as a system, the radio channel control station 20B of the mobile communication system B is allowed to use the shared frequency by providing the radio channel control station 20B of the mobile communication system B with the function of the radio channel control station 20A of the mobile communication system A. It can also function as a requester.
[0190]
The radio network control system according to the present embodiment controls the use state of the shared frequency between the main mobile communication system M and the other two mobile communication systems A and B. With this configuration, it is possible to control the use state of the shared frequency between the main mobile communication system M and each of the other three or more mobile communication systems.
[0191]
(Modification)
In the radio network control systems according to the third to sixth embodiments, when the communication traffic in the mobile communication system using the shared frequency becomes smaller, the mobile communication system M that has the authority to use the shared frequency as a main trunk. It is also possible to move to. FIG. 11 is a flowchart showing an operation when the authority to use the shared frequency is transferred to the main mobile communication system.
[0192]
First, it is assumed that the radio network controller 20A of the mobile communication system A is in a shared frequency operating state. In this case, in order to prevent radio wave interference, the radio network controller 20M of the mobile communication system M is in a shared frequency operation prohibited state.
[0193]
In this state, in the radio network controller 20A of the mobile communication system A, the radio base station 30A subordinate to the radio network controller 20A provides at regular intervals, that is, whenever the communication traffic determination timer times out (S702). Communication traffic in the wireless zone is acquired (S704), and the communication traffic is compared with a threshold value (S706). Here, the timer value of the communication traffic determination timer and the threshold value are determined in advance and stored in the information storage unit 24 of the radio network controller 20A.
[0194]
If the communication traffic becomes smaller than the threshold value as a result of the comparison of the communication traffic with the threshold value, whether or not there is a call in communication at the shared frequency in the radio network controller 20A of the mobile communication system A. (S708), if there are calls in communication on the shared frequency, the channels are switched to channels of other frequencies (S710) and shared after there are no calls in communication on the shared frequency. The transmission of the frequency radio wave is stopped (S712). At this time, the radio network controller 20A of the mobile communication system A is in a shared frequency operation prohibited state.
[0195]
When the radio base station 30A under the control of the radio network controller 20A of the mobile communication system A stops the transmission of the radio wave of the shared frequency, the radio of the mobile communication system M serving as the master from the radio network controller 20B of the mobile communication system A A shared frequency operation cancellation notification indicating that the use of the shared frequency is stopped is transmitted to the line control station 20M (S714).
[0196]
The radio network controller 20M of the mobile communication system M that has received the shared frequency operation cancellation notification transmits a shared frequency operation cancellation confirmation to the radio network controller 20A of the mobile communication system A (S716) and operates the shared frequency. Is started (S718). At this point, the radio network controller 20M of the mobile communication system M enters a shared frequency operating state.
[0197]
As described above, when communication traffic in a mobile communication system using a shared frequency becomes small, the surplus frequency is changed by transferring the authority to use the shared frequency to the main mobile communication system M. By sequentially using the mobile communication system M as the main trunk, the fluctuation can be dealt with even when the communication traffic fluctuation in the main mobile communication system M is relatively large.
[0198]
In the radio network control system according to the present embodiment, when a plurality of shared frequencies are prepared and the use of the shared frequency is allowed, priority is given to the shared frequency with a small number of calls during communication from among the plurality of shared frequencies. It is preferable to allow it. By doing so, it is possible to reduce the process of forcibly disconnecting a call during communication or switching the channel to a channel of another frequency, and the process of stopping wireless communication using a shared frequency is quick and It becomes easy. Further, the influence on the communication quality of the call during communication can be reduced.
[0199]
Furthermore, in the radio network control system according to the present embodiment, when a channel is allocated to a call generated by each of a plurality of mobile communication systems, the channel may be preferentially allocated from a channel having a frequency that cannot be shared with each other. Is preferred. More specifically, when allocating a channel to a call generated by the mobile communication system, first, a channel having a dedicated frequency (that is, a frequency that is not a shared frequency) is allocated to the mobile communication system, and there is no dedicated frequency channel. If this happens, a shared frequency channel is assigned for the first time. By doing in this way, the process which changes the use subject of a shared frequency can be reduced. In addition, it is possible to reduce the process of forcibly disconnecting a call during communication or switching the channel to a channel of another frequency, which occurs due to the change of the use subject of the shared frequency, and wireless communication using the shared frequency. The process of stopping is quick and easy.
[0200]
In addition, the radio network control system according to the present embodiment is configured by the radio network control stations of each of the plurality of mobile communication systems. However, all or part of these functions are exchanged for each of the plurality of mobile communication systems. It can also be given to radio base stations.
[0201]
【The invention's effect】
The radio channel control method and radio channel control system of the present invention prepare a frequency that can be shared among a plurality of mobile communication systems, acquire communication traffic in a radio zone, and share based on the acquired communication traffic. Control usage of possible frequencies. Therefore, it is possible to adaptively use a sharable frequency for each of the plurality of mobile communication systems according to the communication traffic of each of the plurality of mobile communication systems. As a result, it is possible to efficiently use the frequency when a plurality of mobile communication systems coexist.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a mobile communication system.
FIG. 2 is a configuration diagram of a radio network controller.
FIG. 3 is a configuration diagram of a radio base station.
FIG. 4 is a configuration diagram of a mobile communication system.
FIG. 5 is a flowchart showing the operation of the radio network control system according to the first embodiment.
FIG. 6 is a flowchart showing the operation of the radio network control system according to the second embodiment.
FIG. 7 is a flowchart showing an operation of the radio network control system according to the third embodiment.
FIG. 8 is a flowchart showing an operation of the radio network control system according to the fourth embodiment.
FIG. 9 is a flowchart showing the operation of the radio network control system according to the fifth embodiment.
FIG. 10 is a flowchart showing the operation of the radio network control system according to the sixth embodiment.
FIG. 11 is a flowchart showing an operation when the authority to use a shared frequency is transferred to a main mobile communication system.
[Explanation of symbols]
10A, 10B, 10M ... switching center, 20A, 20B, 20M ... radio network controller, 22, 32 ... control unit, 24, 34 ... information storage unit, 26, 36 ... communication unit, 30A, 30B, 30M ... radio base 38, modulation / demodulation unit, 40 ... mobile station

Claims (34)

  1. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A wireless line control method for controlling the use state of the sharable frequency between each of the methods,
    A first acquisition step of acquiring communication traffic of the wireless zone in one mobile communication system;
    When the communication traffic acquired in the first acquisition step is equal to or greater than a predetermined amount, the one mobile communication system is compared with another mobile communication system using a frequency that can be shared from the one mobile communication system. A requesting step for requesting use of the shareable frequency in
    A second acquisition step of acquiring communication traffic of the radio zone in the other mobile communication system;
    In response to the request in the request step, if the communication traffic acquired in the second acquisition step is less than a predetermined amount, the wireless communication using the sharable frequency is stopped in the other mobile communication system, And a radio communication system comprising: a permission step of stopping transmission of radio waves having a sharable frequency, and allowing the other mobile communication system to use the sharable frequency with respect to the one mobile communication system. Line control method.
  2. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A wireless line control method for controlling the use state of the sharable frequency between each of the methods,
    For each of the plurality of mobile communication systems, a priority order regarding the use of the sharable frequency is defined,
    A first acquisition step of acquiring communication traffic of the wireless zone in one mobile communication system;
    When the communication traffic acquired in the first acquisition step is equal to or greater than a predetermined amount, the one mobile communication system is compared with another mobile communication system using a frequency that can be shared from the one mobile communication system. A requesting step for requesting use of the shareable frequency in
    In response to the request in the request step, when the priority of the one mobile communication system is higher than the priority of the other mobile communication system, wireless communication using the frequency that can be shared in the other mobile communication system is performed. And a stop step for stopping transmission of radio waves of the sharable frequency, and allowing the other mobile communication system to use the sharable frequency for the one mobile communication system. A wireless channel control method.
  3. A second acquisition step of acquiring communication traffic of the radio zone in the other mobile communication system;
    The permission step is a case where the priority of the one mobile communication system is equal to or lower than the priority of the other mobile communication system according to the request in the request step, and the second acquisition step If the communication traffic acquired in the above is less than a predetermined amount, the wireless communication using the sharable frequency is stopped in the other mobile communication system, the transmission of the radio wave of the sharable frequency is stopped, and the other The radio network control method according to claim 2 , wherein the mobile communication system permits use of the sharable frequency for the one mobile communication system.
  4. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A wireless line control method for controlling the use state of the sharable frequency between each of the methods,
    An acquisition step of acquiring communication traffic of the radio zone in each of the plurality of mobile communication systems;
    A notification step of notifying the main mobile communication system from each of the plurality of mobile communication systems, the communication traffic acquired in the acquisition step;
    Based on the communication traffic notified in the notification step, the main mobile communication system extracts the mobile communication system with the largest communication traffic, and uses the frequency that can be shared with the mobile communication system with the largest communication traffic. If the mobile communication system is different, the main mobile communication system stops the wireless communication using the sharable frequency in the mobile communication system using the sharable frequency, and the shared A radio network control method comprising: an allowable step of stopping transmission of radio waves of a possible frequency and allowing the mobile communication system having the largest communication traffic to use the sharable frequency.
  5. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A wireless line control method for controlling the use state of the sharable frequency between each of the methods,
    For each of the plurality of mobile communication systems, a priority order regarding use of the sharable frequency and a threshold value regarding communication traffic are defined,
    An acquisition step of acquiring communication traffic of the radio zone in each of the plurality of mobile communication systems;
    A notification step of notifying the main mobile communication system from each of the plurality of mobile communication systems, the communication traffic acquired in the acquisition step;
    Based on the communication traffic notified in the notification step, the main mobile communication system extracts a mobile communication system whose communication traffic is equal to or higher than the threshold, and further prioritizes the extracted mobile communication systems. When the mobile communication system with the highest priority is extracted and the mobile communication system with the highest priority is different from the mobile communication system using the sharable frequency, the main mobile communication system is the shared mobile communication system. In the mobile communication system using a possible frequency, the wireless communication using the shareable frequency is stopped, the transmission of the radio wave of the shareable frequency is stopped, and the mobile communication system with the highest priority And a permission step for allowing the use of the sharable frequency. .
  6. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A wireless line control method for controlling the use state of the sharable frequency between each of the methods,
    A first acquisition step of acquiring communication traffic of the wireless zone in one mobile communication system;
    When the communication traffic acquired in the first acquisition step is greater than or equal to a predetermined amount, use of the sharable frequency in the one mobile communication system from the one mobile communication system to the main mobile communication system A first requesting step to request
    Use of the sharable frequency in the one mobile communication system with respect to another mobile communication system using a frequency sharable by the main mobile communication system in response to the request in the first request step. A second request step for requesting;
    A second acquisition step of acquiring communication traffic of the radio zone in the other mobile communication system;
    If the communication traffic acquired in the second acquisition step is less than a predetermined amount, wireless communication using the sharable frequency is stopped in the other mobile communication system, and radio waves having the sharable frequency are transmitted. And a permitting step for allowing the use of the sharable frequency to the one mobile communication system.
  7. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A wireless line control method for controlling the use state of the sharable frequency between each of the methods,
    For each of the plurality of mobile communication systems, a priority order regarding the use of the sharable frequency is defined,
    An acquisition step of acquiring communication traffic of the wireless zone in one mobile communication system;
    When the communication traffic acquired in the acquisition step is a predetermined amount or more, the mobile communication system that is the main mobile communication system requests the use of the sharable frequency in the mobile communication system. A request step;
    When the priority of the one mobile communication system is higher than the priority of other mobile communication systems using the sharable frequency in response to the request in the request step, Stop radio communication using the sharable frequency in the other mobile communication system, stop sending radio waves of the sharable frequency, and use the sharable frequency for the one mobile communication system A radio network control method comprising: an admissible step that admits
  8. When stopping wireless communication using the sharable frequency and stopping the transmission of radio waves of the sharable frequency, the call being communicated at the sharable frequency is channel-switched to another frequency channel, 8. The radio network control method according to claim 1 , wherein transmission of radio waves of the sharable frequency is stopped after there is no communication call at the sharable frequency.
  9. A plurality of the sharable frequencies are prepared,
    Claims 1-8, wherein upon allowing the use of shareable frequency, from among the plurality of shareable frequency, and wherein the preferential acceptable to the call fewer sharable frequency during communication The wireless line control method according to any one of the above.
  10. 10. The mobile communication system according to claim 1 , wherein each of the plurality of mobile communication systems preferentially assigns a channel having a frequency that cannot be shared with each other when assigning a channel to a call that has occurred. Wireless line control method.
  11. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network control system for controlling the use state of the sharable frequency between each of them,
    First acquisition means provided in one mobile communication system for acquiring communication traffic of the radio zone in the one mobile communication system;
    If the communication traffic provided in the one mobile communication system and acquired by the first acquisition means is greater than or equal to a predetermined amount, the other mobile communication system using a sharable frequency is Request means for requesting use of the shareable frequency in a mobile communication system;
    Second acquisition means provided in the other mobile communication system, for acquiring communication traffic of the radio zone in the other mobile communication system;
    If the communication traffic acquired in the second acquisition means is less than a predetermined amount in response to a request from the request means of the one mobile communication system provided in the other mobile communication system, the other mobile communication system Permission to stop radio communication using the sharable frequency in the communication system, stop sending radio waves of the sharable frequency, and allow the one mobile communication system to use the sharable frequency And a wireless channel control system.
  12. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones There is a radio network control system for controlling the use state of the sharable frequency between each of them,
    For each of the plurality of mobile communication systems, a priority order regarding the use of the sharable frequency is defined,
    First acquisition means provided in one mobile communication system for acquiring communication traffic in the radio zone in the one mobile communication system;
    When the communication traffic provided in the one mobile communication system and acquired by the first acquisition means is a predetermined amount or more, the other mobile communication system using a sharable frequency is Request means for requesting use of the shareable frequency in a mobile communication system;
    When the priority of the one mobile communication system is higher than the priority of the other mobile communication system in response to a request from the request unit of the one mobile communication system, provided in the other mobile communication system, Stop wireless communication using the sharable frequency in the other mobile communication system, stop transmitting radio waves of the sharable frequency, and use the sharable frequency for the one mobile communication system A radio network control system comprising an accepting means for accepting the error.
  13. A second acquisition unit provided in the other mobile communication system, for acquiring communication traffic of the radio zone in the other mobile communication system;
    Whether the permission means of the other mobile communication system is equal to the priority of the other mobile communication system according to a request from the request means of the one mobile communication system. If the communication traffic acquired by the second acquisition means is less than a predetermined amount, the wireless communication using the shareable frequency in the other mobile communication system is stopped, 13. The radio network control system according to claim 12 , wherein transmission of radio waves having the sharable frequency is stopped, and use of the sharable frequency is permitted for the one mobile communication system.
  14. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network control system for controlling the use state of the sharable frequency between each of them,
    An acquisition means provided in each of the plurality of mobile communication systems, for acquiring communication traffic of the radio zone in each of the plurality of mobile communication systems;
    Notifying means provided in each of the plurality of mobile communication systems, for notifying the main mobile communication system of communication traffic acquired by the acquiring means;
    Based on the communication traffic provided in the main mobile communication system and notified from the notification means of each of the plurality of mobile communication systems, the mobile communication system having the largest communication traffic is extracted, and the largest communication traffic is obtained. When the mobile communication system and the mobile communication system using the sharable frequency are different, the radio communication using the sharable frequency in the mobile communication system using the sharable frequency is stopped, A radio network control system comprising: permission means for stopping transmission of radio waves of the sharable frequency and permitting use of the sharable frequency for the mobile communication system having the largest communication traffic. .
  15. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network control system for controlling the use state of the sharable frequency between each of them,
    For each of the plurality of mobile communication systems, a priority order regarding use of the sharable frequency and a threshold value regarding communication traffic are defined,
    An acquisition means provided in each of the plurality of mobile communication systems, for acquiring communication traffic of the radio zone in each of the plurality of mobile communication systems;
    Notifying means provided in each of the plurality of mobile communication systems, for notifying the main mobile communication system of communication traffic acquired by the acquiring means;
    Based on the communication traffic provided in the main mobile communication system and notified from the notification means of each of the plurality of mobile communication systems, a mobile communication system whose communication traffic is equal to or higher than the threshold is extracted and extracted. If the mobile communication system with the highest priority is extracted from the mobile communication systems that have been selected and the mobile communication system with the highest priority is different from the mobile communication system using the sharable frequency, In a mobile communication system using a sharable frequency, wireless communication using the sharable frequency is stopped, transmission of radio waves of the sharable frequency is stopped, and the mobile communication system with the highest priority is provided. And a radio network control system comprising an admission unit that allows use of the sharable frequency. Beam.
  16. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network control system for controlling the use state of the sharable frequency between each of them,
    First acquisition means provided in one mobile communication system for acquiring communication traffic in the radio zone in the one mobile communication system;
    When the communication traffic provided in the one mobile communication system and acquired by the first acquisition means is greater than or equal to a predetermined amount, the sharable mobile communication system can be shared with the mobile communication system serving as a main trunk. First request means for requesting the use of a frequency;
    In response to a request from the first request means of the one mobile communication system provided in the main mobile communication system, the other mobile communication system using a sharable frequency is Second request means for requesting use of the shareable frequency in a mobile communication system;
    Second acquisition means provided in the other mobile communication system for acquiring communication traffic of the radio zone in the other mobile communication system;
    When the communication traffic acquired in the second acquisition unit is less than a predetermined amount in response to a request from the second request unit of the main mobile communication system provided in the other mobile communication system, Stop wireless communication using the sharable frequency in the other mobile communication system, stop transmitting radio waves of the sharable frequency, and use the sharable frequency for the one mobile communication system A radio network control system comprising an accepting means for accepting the error.
  17. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network control system for controlling the use state of the sharable frequency between each of them,
    For each of the plurality of mobile communication systems, a priority order regarding the use of the sharable frequency is defined,
    An acquisition means provided in one mobile communication system, for acquiring communication traffic in the radio zone in the one mobile communication system;
    Use of the sharable frequency in the one mobile communication system with respect to the main mobile communication system provided in the one mobile communication system and when the communication traffic acquired by the acquisition means is a predetermined amount or more Request means for requesting,
    Other mobiles that are provided in the main mobile communication system and that use the frequency with which the priority of the one mobile communication system is shared in response to a request from the request means of the one mobile communication system If the priority is higher than the priority of the communication system, the wireless communication using the sharable frequency in the other mobile communication system is stopped, the transmission of radio waves of the sharable frequency is stopped, and the one mobile communication system And a permitting means for permitting the use of the sharable frequency.
  18. When stopping wireless communication using the sharable frequency and stopping the transmission of radio waves of the sharable frequency, the call being communicated at the sharable frequency is channel-switched to another frequency channel, The radio network control system according to any one of claims 11 to 17 , wherein transmission of radio waves of the sharable frequency is stopped after there is no call in communication at the sharable frequency.
  19. A plurality of the sharable frequencies are prepared,
    19. When allowing the use of the sharable frequency, the sharable frequency with a small number of calls in communication is preferentially permitted from the plurality of sharable frequencies. The radio network control system according to any one of the above.
  20. 20. Each of the plurality of mobile communication systems, when assigning a channel to a call that has occurred, preferentially assigns a channel of a frequency that is not sharable with each other. Wireless line control system.
  21. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    Provided in one mobile communication system,
    Obtaining means for obtaining communication traffic of the wireless zone in the one mobile communication system;
    When the communication traffic acquired in the acquisition means is a predetermined amount or more, another mobile communication system using a sharable frequency is requested to use the sharable frequency in the one mobile communication system. A radio network controller comprising: a requesting means for performing
  22. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    Provided in one mobile communication system,
    Obtaining means for obtaining communication traffic of the wireless zone in the one mobile communication system;
    In response to a request for use of the sharable frequency from another mobile communication system, when the communication traffic acquired by the acquiring means is less than a predetermined amount, the sharable frequency in the one mobile communication system is used. And a permitting means for stopping transmission of radio waves having the sharable frequency and allowing the other mobile communication system to use the sharable frequency. Radio network control station.
  23. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    For each of the plurality of mobile communication systems, a priority order regarding the use of the sharable frequency is defined,
    Provided in one mobile communication system,
    When the priority of the other mobile communication system is higher than the priority of the one mobile communication system in response to a request for use of the shareable frequency from another mobile communication system, in the one mobile communication system An admission unit that stops wireless communication using the sharable frequency, stops transmission of radio waves of the sharable frequency, and allows the other mobile communication system to use the sharable frequency. A radio network controller characterized by comprising.
  24. An acquisition means for acquiring communication traffic of the wireless zone in the one mobile communication system;
    In the case where the priority of the other mobile communication system is equal to or lower than the priority of the one mobile communication system in response to a request to use the sharable frequency from the other mobile communication system, And when the communication traffic acquired by the acquisition means is less than a predetermined amount, the wireless communication using the sharable frequency in the one mobile communication system is stopped, and the sharable frequency The radio network controller according to claim 23 , wherein transmission of radio waves is stopped and use of the sharable frequency is permitted to the other mobile communication system.
  25. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    Provided in one mobile communication system,
    Obtaining means for obtaining communication traffic of the wireless zone in the one mobile communication system;
    A radio network controller comprising: notification means for notifying the main mobile communication system of communication traffic acquired by the acquisition means.
  26. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    Provided in the main mobile communication system,
    Based on the communication traffic in the radio zone in each of the plurality of mobile communication systems notified from each of the plurality of mobile communication systems, the mobile communication system having the largest communication traffic is extracted and the mobile communication system having the largest communication traffic is extracted. If the mobile communication system using the sharable frequency is different from the mobile communication system using the sharable frequency, wireless communication using the sharable frequency in the mobile communication system using the sharable frequency is stopped, and the sharable A radio network controller comprising: permission means for stopping transmission of radio waves of a different frequency and permitting use of the sharable frequency for a mobile communication system having the largest communication traffic.
  27. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    For each of the plurality of mobile communication systems, a priority order regarding use of the sharable frequency and a threshold value regarding communication traffic are defined,
    Provided in the main mobile communication system,
    Based on communication traffic in the radio zone in each of the plurality of mobile communication systems notified from each of the plurality of mobile communication systems, a mobile communication system in which communication traffic is equal to or greater than the threshold is extracted, and the extracted movement If a mobile communication system with the highest priority is extracted from the communication systems, and the mobile communication system using the sharable frequency is different from the mobile communication system with the highest priority, the shareable Stop wireless communication using the sharable frequency in a mobile communication system using a frequency, stop transmitting radio waves of the sharable frequency, and to the mobile communication system with the highest priority A radio network controller characterized by comprising an accepting means for allowing use of a sharable frequency.
  28. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    Provided in one mobile communication system,
    Obtaining means for obtaining communication traffic of the wireless zone in the one mobile communication system;
    When communication traffic acquired by the acquisition unit is a predetermined amount or more, a request unit is provided for requesting the main mobile communication system to use the sharable frequency in the one mobile communication system. A radio network controller characterized by.
  29. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    Provided in the main mobile communication system,
    Use of the shareable frequency in the one mobile communication system in response to a request for use of the shareable frequency from one mobile communication system with respect to another mobile communication system using the shareable frequency. A radio network controller characterized by comprising request means for requesting.
  30. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    Provided in one mobile communication system,
    Obtaining means for obtaining communication traffic of the wireless zone in the one mobile communication system;
    When the communication traffic acquired by the acquisition means is less than a predetermined amount in response to a request for using the sharable frequency in another mobile communication system transmitted from the main mobile communication system, the one mobile communication Permit means for stopping wireless communication using the sharable frequency in the system, stopping transmission of radio waves of the sharable frequency, and allowing the use of the sharable frequency to the other mobile communication system And a radio network controller.
  31. A plurality of mobile communication systems in which radio zones provided by radio base stations overlap with each other and frequencies that can be shared with each other for frequencies used for radio communication between the radio base station and the mobile station in the radio zones A radio network controller that constitutes a radio network control system that controls the use state of the sharable frequency between each of the above,
    For each of the plurality of mobile communication systems, a priority order regarding the use of the sharable frequency is defined,
    Provided in the main mobile communication system,
    In response to a request for use of the sharable frequency from one mobile communication system, the priority of the one mobile communication system is higher than the priority of other mobile communication systems using the sharable frequency. The wireless communication using the shareable frequency in the other mobile communication system is stopped, the transmission of the radio wave of the shareable frequency is stopped, and the shareable frequency for the one mobile communication system A radio network controller characterized by comprising an accepting means for allowing the use of
  32. When stopping wireless communication using the sharable frequency and stopping the transmission of radio waves of the sharable frequency, the call being communicated at the sharable frequency is channel-switched to another frequency channel, 32. The transmission of the radio wave of the sharable frequency is stopped after there is no call in communication at the sharable frequency. 32 . The radio network controller according to item 1.
  33. A plurality of the sharable frequencies are prepared,
    Claim 22 and 23 wherein upon allowing the use of shareable frequency, from among the plurality of shareable frequency, and wherein the preferential acceptable to the sharable frequency number of calls is less in communication , 24, 26, 27 , 30 , 31 The radio network controller according to any one of the above.
  34. The radio network controller according to any one of claims 21 to 33, wherein when a channel is allocated to a call that has occurred, the channel is preferentially allocated from a channel having a frequency that cannot be shared with each other.
JP2002143567A 2002-05-17 2002-05-17 Radio channel control method, radio channel control system, and radio channel control station Expired - Fee Related JP3618097B2 (en)

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JP4642609B2 (en) * 2005-09-05 2011-03-02 日本電信電話株式会社 Wireless packet communication system and communication method
JP4685646B2 (en) * 2006-01-30 2011-05-18 株式会社東芝 Base station apparatus, radio communication system, and frequency allocation method
JP4542997B2 (en) * 2006-02-08 2010-09-15 株式会社東芝 Wireless communication apparatus and wireless communication method
US7844277B2 (en) * 2006-03-21 2010-11-30 Alcatel-Lucent Usa Inc. Method for coordinated control of radio resources in a distributed wireless system
JP4584170B2 (en) * 2006-03-23 2010-11-17 日本電信電話株式会社 Wireless packet communication system and wireless packet communication method
JP4648873B2 (en) * 2006-05-23 2011-03-09 日本電信電話株式会社 Wireless communication system and frequency management device
JP5087412B2 (en) * 2007-02-28 2012-12-05 株式会社エヌ・ティ・ティ・ドコモ Transmitter, mobile communication system, base station, and communication permission signal transmitter
GB0801534D0 (en) * 2008-01-28 2008-03-05 Fujitsu Lab Of Europ Ltd Communications systems
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JP4907700B2 (en) 2009-07-10 2012-04-04 株式会社エヌ・ティ・ティ・ドコモ Radio station, transmitter station, and frequency band sharing method
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JP5427221B2 (en) * 2011-01-07 2014-02-26 株式会社Nttドコモ Wireless communication method and wireless base station
US9648501B2 (en) * 2011-09-08 2017-05-09 Telecom Italia S.P.A. Inter-operator spectrum sharing control, inter-operator interference coordination method, and radio resource scheduling in wireless communication systems

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