JP2009049904A - Channel allocation method, radio communication system, management station apparatus, and radio communication apparatus - Google Patents

Abstract

A channel allocation method for efficiently using a radio frequency band without waste is provided.
A newly established station 1-4 sends a channel assignment request message 6-1 to a management station 1-1. The management station 1-1 selects a primary usable channel and a secondary usable channel for the newly established station 1-4 from the channel assignment request message 6-1, and re-uses the already used channel. The channel availability determination is performed while assuming the arrangement, and the final channel assignment to the newly established station 1-4 is transmitted to the newly established station 1-4 as a channel assignment notification message 6-3 to use the interference station 1-5. The channel change is transmitted to the interfering station 1-5 as a channel change instruction message 6-2. The new station 1-4 performs communication using the assigned channel. On the other hand, the interfering station 1-5 performs communication on the instructed change destination channel according to the channel change instruction message 6-2.
[Selection] Figure 6

Description

  The present invention relates to a channel assignment method, a radio communication system, and a management for assigning an optimum channel to each radio communication device in a radio communication system in which a management station device assigns a use channel to a plurality of radio communication devices. The present invention relates to a station apparatus and a wireless communication apparatus. In particular, in a configuration in which the management station device is connected to a plurality of wireless communication devices and can communicate control information, primary usage, which is a usage category in which a channel can be used preferentially as a channel usage category, and To allocate optimal channels to each wireless communication device in a wireless environment in which channel usage categories with different priorities, such as secondary usage, which can be borrowed when not being used, are set. The present invention relates to a channel assignment method, a radio communication system, a management station apparatus, and a radio communication apparatus.

  In recent years, wireless communication services typified by mobile phones and wireless LANs are becoming more sophisticated and diversified, and the demand for frequency resources used for such wireless communication is rapidly increasing. On the other hand, the assignment of the use of radio waves has already been determined in almost all frequency bands. Therefore, frequency resources are tight, and this trend is expected to accelerate further in the future. Therefore, the importance of effective use technology of frequency resources that can efficiently use limited frequency resources is increasing.

  Examples of technologies that make effective use of frequency resources include repeated use of frequencies in cellular systems, improved frequency utilization efficiency through advanced communication methods, and frequency bands with low power density through UWB (Ultra Wide Band). The method of sharing is mentioned.

  In addition, in order to effectively use a frequency band that is rarely used depending on a time zone even though it is assigned to a specific use, a secondary usage technology that borrows and uses such a frequency band has been introduced. It is considered effective and research is being conducted. In order to realize the secondary usage technology, a primary usage channel that is a channel usage category that can be used preferentially, and a secondary usage channel that is a channel usage category that can be borrowed and used if not used. There is a need for a channel allocation method that reflects the difference in channel usage classification.

Furthermore, as a method for reducing the event of suspension of secondary usage and the inability to start secondary usage of a newly established wireless communication device, it is effective to rearrange the used channels in the wireless communication device that is using the channel. As a result, it can be expected to improve the frequency utilization efficiency. As a channel reassignment method, a technique is known in which a use channel of a wireless communication device is rearranged and frequency resources are effectively used in a single system such as a cellular system (see, for example, Patent Document 1).
Japanese Patent No. 3314380

  However, the channel reassignment method described in Patent Document 1 described above is a method applied to a single system such as a cellular system, and considers channel use classifications having different priorities such as primary use and secondary use. Not done. Therefore, when a secondary usage channel is to be secured, the channel reassignment method cannot be applied as it is because the channel cannot be changed for the primary usage wireless communication apparatus.

  In other words, the conventional channel allocation technique does not assume channel rearrangement even when secondary usage is possible, or performs channel rearrangement only within a single system. Therefore, there is a difference in priority between primary usage, which is a usage category that can preferentially use a channel, and secondary usage, which is a usage category that can be borrowed and used when the channel is not used. In a wireless communication system that operates in a frequency band in which a channel usage category is set, channel rearrangement and channel allocation that reflect the difference in channel usage category cannot be performed.

  Also, by performing channel rearrangement, the frequency utilization efficiency of the entire wireless communication system is improved. However, the amount of calculation processing required to implement channel rearrangement and the number of times of channel change of the wireless communication device in communication are dramatically increased. Increase. However, from the viewpoint of real-time operation of the wireless communication system and cost, an increase in the amount of calculation processing is not desirable, and a channel change may cause a decrease in communication quality. In many cases, it is better to keep the number low.

  Accordingly, there is a trade-off relationship between effective use of frequencies by channel rearrangement and real-time performance, cost, and communication quality. Such a trade-off compromise varies depending on the use situation of the wireless communication system. In a wireless communication system in which a plurality of channel usage categories are defined, the above-mentioned compromise changes more complicatedly. Therefore, there is a need for a channel rearrangement method that can flexibly set the scale of rearrangement, that is, the number of radio communication devices to be rearranged.

  Also in a wireless communication system that performs secondary usage, a highly realizable channel rearrangement method is required. In general, the problem of channel assignment is considered to be an NP (Non-deterministic Polynomial) complete problem in which it is difficult to find an optimum pattern, and it is said that there is no solution for finding a channel assignment pattern that can use the frequency most effectively. . For this reason, it can be said that channel rearrangement for all wireless communication devices is not highly feasible and practical in terms of processing cost and real-time properties.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a channel allocation method, a radio communication system, a management station apparatus, and a radio that can efficiently use a radio frequency band without waste. It is to provide a communication device.

  In order to solve the above-described problems, the present invention provides a primary usage that is a usage category that can be preferentially used, and a secondary usage that is a usage category that can be borrowed and used when not used elsewhere. A plurality of wireless communication devices capable of communicating using a channel in a frequency band in which channel use classifications having different priorities are set, and changing the channel to be used, and a channel for each of the wireless communication devices A channel allocation method using a management station apparatus for allocating a channel, wherein the wireless communication apparatus uses channel utilization classification information indicating a channel utilization classification desired by the own apparatus and desired channel information indicating a channel number desired by the own apparatus. A channel request transmission process for transmitting a channel assignment request message including at least one of the message to the management station apparatus and the management station apparatus A channel use start process for receiving a channel assignment notification message including information on the received channel and starting wireless communication using the assigned channel, and when the channel is used in the secondary use channel use section, the management station A channel change process for receiving a channel change instruction message for instructing to change or stop the use of a channel from the device, changing the use channel to the channel indicated by the channel change instruction message, or stopping the use; The management station device holds the content of the channel assignment request message received from the wireless communication device, the channel for each usage category that is permitted to be used in advance for the wireless communication device, and the own device. Select a channel to be allocated to the wireless communication device based on the wireless environment information. Radio communication that requires a channel selection process for determining a method for rearranging channels used by an existing radio communication apparatus and a change or stop of use of a channel in use based on a result of determination in the channel selection process A channel change instruction transmission process for transmitting the channel change instruction message to an apparatus, and a channel assignment notification transmission process for transmitting the channel assignment notification message to the wireless communication apparatus based on a selection result of the channel selection process. This is a channel assignment method characterized by the above.

  According to the present invention, in the above invention, the wireless communication device can be used when the management station device has primary usage and secondary usage preference set in channel usage classification information of the channel assignment request message. Primary use availability determination process for performing primary use availability determination while permitting rearrangement of use channels with respect to existing wireless communication apparatuses for all primary use channels or desired channels included in the channel assignment request message As a result of the determination in the primary availability determination process, if there is no primary usable channel, all the secondary usage channels that can be used by the wireless communication device are used channel numbers for the existing wireless communication device. A secondary availability determination process for performing secondary availability determination while allowing rearrangement, and the channel assignment notification If there is a primary usable channel as a result of the determination in the primary availability determination process, an optimal channel is assigned as the primary usage among the channels, and the channel is classified as a primary usage category. When a secondary usable channel is found as a result of the determination in the secondary availability determination process, the optimum channel is used secondaryly. As a result of the determination in the secondary availability determination process, there is no secondary usable channel. In this case, a channel assignment notification message indicating that channel assignment is not possible is transmitted to the wireless communication device, and the channel change instruction is transmitted. If, in the primary availability determination process or the secondary availability determination process, it is determined that use channel relocation of an existing wireless communication device is necessary, the channel is changed to the corresponding wireless communication device. An instruction message is transmitted.

  According to the present invention, in the above invention, the management station apparatus does not set a secondary use request in the channel use classification information of the channel assignment request message, and sets a primary use request. In this case, while allowing all the primary usage channels that can be used by the wireless communication device or the desired channels included in the channel assignment request message, the rearrangement of the usage channels with respect to the existing wireless communication device is permitted. A primary availability determination process for performing a next availability determination, and when the channel assignment notification transmission process has a primary available channel as a result of the determination in the primary availability determination process, A channel assignment notification message indicating that the most suitable channel is assigned as primary use and that the channel is assigned in the primary use category. When there is no primary usable channel as a result of the determination in the primary availability determination process, a channel allocation notification message indicating that channel allocation is impossible is transmitted to the wireless communication device. And when the channel change instruction transmission process determines that the use channel rearrangement of the existing wireless communication device is necessary in the primary availability determination step, the channel change instruction transmission step transmits a channel to the corresponding wireless communication device. A change instruction message is transmitted.

  According to the present invention, in the above invention, the management station apparatus does not set a primary use request in the channel use classification information of the channel assignment request message, and sets a secondary use request. The secondary use permission / inhibition for determining whether or not the secondary use is possible while permitting rearrangement of the use channels with respect to the existing wireless communication device with respect to all the secondary use channels that can be used by the wireless communication device. The channel assignment notification transmission process further includes a determination process in the secondary availability determination process. If there is a secondary usable channel as a result of the determination in the secondary availability determination process, the optimum channel is determined as the secondary usage. A channel assignment notification message indicating assignment and assignment of the channel in the secondary use category is transmitted to the wireless communication device, while in the secondary availability determination process. As a result of the determination, if there is no secondary usable channel, a channel allocation notification message indicating that channel allocation is not possible is transmitted to the wireless communication apparatus, and the channel change instruction transmission process is performed by determining whether the secondary usage is possible. In the determination process, when it is determined that the use channel rearrangement of the existing wireless communication device is necessary, a channel change instruction message is transmitted to the corresponding wireless communication device.

  According to the present invention, in the above-described invention, the primary availability determination process is indicated by all the primary usage channels that can be used by the wireless communication device or desired channel information included in the channel assignment request message. The interference estimation process for estimating the interference and the estimation of the interference for the next usage channel, and the result of the determination in the interference estimation process, as a result of the determination in the interference estimation process, directly or indirectly If it is determined that there is a possibility that the wireless communication device can primarily use the channel if the use channel rearrangement based on the difference in the use section is performed on another wireless communication device having an interference problem, the other Assuming the rearrangement of the channels used by the wireless communication apparatus of the other, the channel rearrangement pattern calculation process for performing the interference estimation process again, and the determination in the interference estimation process. As a result, when it is determined that there is no interference problem by applying the predetermined rearrangement pattern, a primary availability final determination process for determining that the channel according to the predetermined rearrangement pattern is primary usable, It is characterized by having.

  According to the present invention, in the above invention, the secondary availability determination process includes an interference estimation process for performing interference estimation and interference estimation for all secondary usage channels that can be used by the wireless communication device; As a result of the determination in the interference estimation process, use based on the difference in use category with respect to another wireless communication device having a problem of interference or interference directly or indirectly with the wireless communication device If it is determined that there is a possibility that the wireless communication apparatus can secondary use the channel if channel rearrangement is performed, the rearrangement of the used channel of the other wireless communication apparatus is assumed, and the interference estimation process is performed again. If it is determined that there is no interference problem by applying a predetermined rearrangement pattern as a result of the determination in the channel rearrangement pattern calculation process to be performed and the interference estimation process, the predetermined A secondary use permission final determination process determines a channel in accordance with the rearrangement pattern secondary available and characterized by having a.

  According to the present invention, in the above-described invention, the secondary availability determination process includes an operator or a wireless communication system that can be used as a primary usage channel among all secondary usage channels that can be used by the wireless communication device. As a result of the determination in the first interference estimation process, the first interference estimation process for estimating the interference and the interference with respect to the free channel for which Indirectly, if the used channel is rearranged based on the difference in the usage category for another radio communication device having the problem of interference or interference, the radio communication device can secondary use the free channel. If it is determined that there is a possibility, the first channel rearrangement pattern for performing the first interference estimation process again assuming the rearrangement of the used channel of the other wireless communication apparatus. When it is determined that there is no interference problem by applying the rearrangement pattern obtained in the first channel rearrangement pattern calculation process as a result of the determination in the calculation process and the first interference estimation process, As a result of the determination in the first secondary availability final determination process for determining that the channel is secondary usable and the first interference estimation process, it is determined that there is no secondary usable channel in the free channel. A second interference estimation process for estimating interference and other interference with respect to the other channel, which is a secondary usage channel other than the free channel, and the second interference estimation process. As a result of the determination in step (b), the other wireless communication device having a problem of interference or interference with the wireless communication device directly or indirectly is used based on the difference in the use category. If it is determined that there is a possibility that the wireless communication device can secondary use the other person's channel if the rearrangement is performed, the rearrangement of the used channel of the other wireless communication device is assumed, and the first A second channel rearrangement pattern calculation process for performing the second interference estimation process, and a rearrangement pattern obtained in the first channel rearrangement pattern calculation process as a result of the determination in the second interference estimation process is applied. When it is determined that there is no problem of interference, the second secondary availability final determination process for determining that the other party channel is secondary available is provided.

  According to the present invention, in the above invention, the wireless environment information includes primary usage channel information indicating a channel number in which each business operator is permitted primary use in each region, and each business operator in each region is secondary. A channel usage classification table in which information including at least one or more pieces of information regarding channel usage classification in a specific region is stored as system parameter information with secondary usage channel information indicating channel numbers permitted to be used. For all wireless communication devices, the wireless communication device number information indicating a given unique number, the installer information indicating the installation operator, and the provider using the primary use at the installation point of the wireless communication device. Primary usage channel information indicating allowed channel numbers, and channels in which the service provider is permitted secondary usage at the location where the wireless communication device is installed Secondary usage channel information indicating a number, in-use channel information indicating a channel number being used, position information indicating the position of the wireless communication device, presence / absence of mobility of the wireless communication device, movement speed, and movement range Mobility information indicating one or more of them, transmission / reception channel information indicating a channel number of a channel capable of transmitting and receiving radio waves in the wireless transmission / reception circuit of the wireless communication device, transmission characteristic information indicating transmission characteristics of the wireless communication device, Reception characteristic information indicating reception characteristics of the wireless communication apparatus, required DU ratio information indicating a ratio of a desired wave and an interference wave required by the wireless communication apparatus, and an adjacent channel interference reduction coefficient of the wireless communication apparatus. Of the adjacent communication channel IRF information and the use period information indicating one or more of the channel use start time and the channel use end scheduled time of the wireless communication device. Of the information regarding the situation, device specifications, and conditions of the wireless communication system, a wireless station table storing information including at least one or more pieces of information as system parameter information, and wireless transmission / reception of the wireless communication device for all wireless communication devices Transmission / reception channel information indicating a channel number of a channel capable of transmitting and receiving radio waves in the circuit, total interference amount information indicating a total interference amount received by the wireless communication device in the channel, and a channel in which the channel is interfered Interference channel information indicating numbers, partner station number information indicating a unique number given to a partner station that is another wireless communication device that is using the channels that cause the interference, and the amount of interference received from the partner station by the wireless communication device Information including at least one or more pieces of information regarding interference of the wireless communication device with interference amount information indicating And an interference table stored as system parameter information.

  Further, in order to solve the above-described problems, the present invention provides a primary usage that is a usage category that can be preferentially used and a secondary usage that is a usage category that can be borrowed and used when it is not used elsewhere. A plurality of wireless communication devices capable of communicating using a channel in a frequency band in which channel use classifications having different priorities are set and changing the channel to be used, and each of the wireless communication devices A wireless communication system using a management station device that allocates a channel to the wireless communication device, wherein the wireless communication device requests channel usage classification information indicating a channel usage classification desired by the own device and a channel number desired by the own device. Channel request transmission means for transmitting a channel allocation request message including at least one of channel information and the channel information to the management station device, and allocation from the management station device A channel utilization start means for receiving a channel assignment notification message including information on the assigned channel and starting wireless communication by the assigned channel, and when the channel is used in the secondary use channel use section, the management Channel change means for receiving a channel change instruction message for instructing to change or stop the use of a channel from the station apparatus, and changing the use channel to the channel indicated by the channel change instruction message or stopping the use The management station device holds the content of the channel assignment request message received from the wireless communication device, the channel for each usage category that is permitted to be used in advance for the wireless communication device, and the own device. Based on the wireless environment information, a channel to be assigned to the wireless communication device is selected. And a channel selection unit that determines a method of rearranging channels used by the existing wireless communication device, and a wireless unit that needs to stop changing or using the channel being used based on a selection result by the channel selection unit. A channel change instruction transmitting means for transmitting the channel change instruction message to a communication apparatus; and a channel assignment notification transmitting means for transmitting the channel assignment notification message to the wireless communication apparatus based on a selection result by the channel selecting means. A wireless communication system.

  Further, in order to solve the above-described problems, the present invention provides a primary usage that is a usage category that can be preferentially used and a secondary usage that is a usage category that can be borrowed and used when it is not used elsewhere. Management station that allocates a channel to each of a plurality of wireless communication devices that can communicate using a channel in a frequency band in which a channel use category having a difference in priority is set and can change the channel to be used At least one of channel usage classification information indicating a channel usage classification desired by the wireless communication device and desired channel information indicating a channel number desired by the wireless communication device received from the wireless communication device The contents of the channel assignment request message including the above, the channel for each usage category that is permitted to be used in advance for the wireless communication device, and the holding of the device itself Channel selection means for selecting a channel to be allocated to the wireless communication device based on the wireless environment information and determining a method for rearranging channels used by the existing wireless communication device, and a selection result by the channel selection means Based on this, when a channel is being used in the secondary usage channel usage section for a wireless communication device that needs to change or stop the usage channel, the channel being used is changed or the usage is stopped. A channel change instruction transmitting means for transmitting a channel change instruction message for instructing to transmit, and a channel assignment for transmitting a channel assignment notification message including information on the assigned channel to the wireless communication apparatus based on a selection result by the channel selecting means. A management station apparatus comprising: a notification transmission unit;

  According to the present invention, in the above-mentioned invention, when primary usage and secondary usage request are set in the channel usage classification information of the channel assignment request message, all primary usages that can be used by the wireless communication device A primary availability determination unit that determines primary availability of the channel or a desired channel included in the channel allocation request message while allowing rearrangement of the usage channel with respect to an existing wireless communication device; and the primary usage As a result of the determination by the availability determination means, if there is no primary usable channel, it is assumed that all the secondary usage channels that can be used by the wireless communication device are rearranged for the existing wireless communication device. Secondary availability judgment means for performing secondary availability judgment, wherein the channel allocation notification transmission means is the primary interest. If there is a primary usable channel as a result of the determination by the availability determining means, a notification message indicating that the most suitable channel is allocated as the primary usage and that the channel is allocated in the primary usage category is displayed. When there is a secondary usable channel as a result of the determination by the secondary availability determination unit that is transmitted to the wireless communication device, an optimal channel is allocated as the secondary usage, and the channel is assigned to the secondary usage. When a channel assignment notification message indicating assignment in the use division of use is transmitted to the wireless communication apparatus, and there is no secondary usable channel as a result of the judgment by the secondary availability judgment unit, channel assignment is not possible. A channel assignment notification message indicating the presence of the channel change instruction is transmitted to the wireless communication apparatus, and the channel change instruction transmission means A channel change instruction message is transmitted to the corresponding wireless communication device when it is determined by the stage or the secondary availability determination unit that the use channel rearrangement of the existing wireless communication device is necessary. To do.

  According to the present invention, in the above invention, when the channel use classification information of the channel assignment request message is not set for the secondary use request and the primary use request is set, For all the primary usage channels that can be used by the communication device or the desired channel included in the channel assignment request message, the primary usage availability determination is performed while allowing rearrangement of the usage channels to the existing wireless communication device. Primary availability determination means further comprising: a channel assignment notification transmission means that, as a result of the determination by the primary availability determination means, if there is a primary useable channel, an optimum channel among them is selected. A channel assignment notification message indicating that the channel is assigned for primary use and the channel is assigned in the primary use category is sent to the wireless communication device. On the other hand, if there is no primary usable channel, a channel assignment notification message indicating that channel assignment is not possible is transmitted to the wireless communication device, and the channel change instruction transmission means When it is determined by the determining means that the use channel rearrangement of the existing wireless communication apparatus is necessary, a channel change instruction message is transmitted to the corresponding wireless communication apparatus.

  According to the present invention, in the above invention, when the channel use classification information of the channel assignment request message is not set to the primary use request and the secondary use request is set, the radio Secondary use availability determination means for performing secondary use availability determination while permitting rearrangement of the use channels with respect to the existing wireless communication device is further provided for all secondary use channels that can be used by the communication device. If there is a secondary usable channel as a result of the determination by the secondary availability determination unit, the channel allocation notification transmitting unit allocates an optimum channel among them as secondary usage, and assigns the channel to 2 When a channel assignment notification message indicating assignment in the next use category is transmitted to the wireless communication device, and there is no secondary usable channel, A channel assignment notification message indicating that it is not possible to transmit to the wireless communication apparatus, and the channel change instruction transmitting means needs to relocate the use channel of the existing wireless communication apparatus by the secondary availability determination means. If it is determined that there is, a channel change instruction message is transmitted to the corresponding wireless communication apparatus.

  Further, in order to solve the above-described problems, the present invention provides a primary usage that is a usage category that can be preferentially used and a secondary usage that is a usage category that can be borrowed and used when it is not used elsewhere. Communication using a channel in a frequency band for which a channel usage classification with a difference in priority is set is possible, and the channel to be used can be changed, and wireless communication is performed using a channel assigned by the management station device The wireless communication apparatus manages the channel assignment request message including at least one of channel use classification information indicating a channel use classification desired by the own apparatus and desired channel information indicating a channel number desired by the own apparatus. A channel request transmission means for transmitting to the station apparatus, and a channel allocation notification message including information on the allocated channel from the management station apparatus. When the channel is used in the channel usage section for the secondary usage and the channel usage starting means for starting wireless communication by the assigned channel, the channel being used is changed or the usage is stopped from the management station device A wireless communication apparatus comprising: a channel change means for receiving a channel change instruction message for instructing to change, and changing a use channel to a channel indicated by the channel change instruction message or stopping the use. .

  According to the present invention, a wireless communication apparatus wishes to allocate a channel including at least one of channel usage classification information indicating a channel usage classification desired by the own apparatus and desired channel information indicating a channel number desired by the own apparatus. The management station device transmits the message to the management station device, and the management station device stores in advance the contents of the received channel assignment request message and the channel for each usage category that is permitted to be used in advance for the wireless communication device that has transmitted the message. Based on the wireless environment information, a channel to be allocated to the wireless communication device is selected, a method for rearranging the channel used by the existing wireless communication device is determined, and based on the result, a channel assignment notification message is transmitted to the wireless communication device. The wireless communication device that has transmitted the channel assignment notification message to the channel notified by the message Therefore, the wireless communication device starts, and the management station device transmits a channel change instruction message to the wireless communication device that needs to change or stop using the channel that is being used as a result of channel selection. The received wireless communication apparatus changes the use channel to the channel indicated by the message or stops the use, so that the channel assignment and the channel rearrangement reflecting the difference in the channel use division can be performed. . In other words, it is possible to borrow a frequency band that has not been used for secondary use, to effectively use frequency resources, and to reduce the suspension of use of a wireless communication device that secondary uses a channel. A wireless communication service can be provided, and as a result, more effective use of frequencies can be realized.

Also, channel allocation can be performed in both cases where the wireless communication apparatus uses the channel primarily and when it uses the channel primarily. Further, by analyzing the content of the channel assignment request message received from the wireless communication apparatus by the management station, it is possible to perform channel assignment reflecting the request of the wireless communication apparatus.
In addition, since it is possible to flexibly set the size of channel relocation, that is, the number of wireless communication devices to be relocated, the frequency according to the channel usage status and the power relationship between operators in the channel usage category, etc. It is easy to make a trade-off between effective use and channel change cost. In addition to the two types of channel usage divisions, primary usage and secondary usage, the scale of channel rearrangement can be flexibly set according to the priority of the channel usage division when it becomes more complicated. It is easy to ensure fairness of channel use opportunities. In addition, it is possible to perform channel relocation with high feasibility according to the system cost and the real-time property required for the system.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
A. Basic Configuration In this embodiment, in a specific area, as a channel usage category, a primary usage channel that is a usage category that allows the channel to be used preferentially, and when it is not used, the channel can be borrowed and used. With reference to the drawings, a case where a wireless communication apparatus is newly established in a wireless communication system that operates in a frequency band in which a channel use section having a different priority order is set, which is a secondary use channel that is a different use section, will be described. However, it explains in detail. It is assumed that the primary use wireless communication device should not be instructed to change the channel or stop using the channel, and channel rearrangement is performed only for the secondary use wireless communication device. . In the following example, not only the two stages of primary use and secondary use, but also a wireless communication system that operates in a frequency band in which channel use sections are further subdivided and complicated.

<Explanation of system configuration>
FIG. 1 is a block diagram illustrating a configuration example of a wireless communication system according to the present embodiment. Manages the channels used by the wireless communication devices via the newly established station 1-4, which is a wireless communication device newly installed by the A carrier, and the A carrier network 1-2, which is a communication network laid by the A carrier. A possible management station 1-1 is connected by wire or wirelessly. The management station 1-1 and the newly established station 1-4 can communicate control information via the A carrier network 1-2.

  Further, an interference station 1-5, which is a wireless communication apparatus already installed by the B operator, is connected to the management station 1-1 via the B operator network 1-3. Here, the newly established stations 1-4 and the interference station 5 which are wireless communication devices may be not only fixed installation type wireless communication devices but also mobile wireless communication devices having mobility, and a plurality of wireless communication devices. A device may be connected to each carrier network. Further, the operator network connected to the management station 1-1 may be not only two parties but also a large number of operator networks.

<Description of each device configuration>
The configuration of each part of the system will be described in detail with reference to FIGS.
FIG. 2 is a diagram illustrating an example of the configuration and connection of each device according to the present embodiment.
The management station 1-1 and the newly established station 1-4 are connected to each other through the A carrier network 1-2 in the same form as in FIG. 1, and the management station 1-1 and the interference station 1-5 are connected to each other in FIG. In the same manner as above, and connected via the B operator 1-3. The management station 1-1 includes at least a channel assignment request message reception circuit 2-2, a use channel determination circuit 2-3, a channel assignment notification transmission circuit 2-6, a channel use classification table 2-7, and a radio station table 2-8. , An interference table 2-9, a channel change instruction message transmission circuit 2-10, and a network interface circuit 2-11.

  The usage channel determination circuit 2-3 includes a primary usage availability determination circuit 2-4 and a secondary usage availability determination circuit 2-5. The primary availability determination circuit 2-4 includes a rearrangement calculation circuit 2-24, an interfered estimation circuit 2-25, and an interference estimation circuit 2-26. The secondary availability determination circuit 2-5 is rearranged. A calculation circuit 2-27, an interfered estimation circuit 2-28, and an interference estimation circuit 2-29 are provided.

The newly established station 1-4 and the interfering station 1-5 are often wireless communication apparatuses having the same configuration, but here, only the components necessary for explaining the operation of each apparatus will be described.
The new station 1-4 includes at least a channel assignment request message transmission circuit 2-12, a channel assignment notification message reception circuit 2-13, a use channel setting circuit 2-14, a radio transmission / reception circuit 2-15, and a network interface circuit 2-17. It has. Further, an interference amount measurement circuit 2-16 may be provided. The interference station 1-5 includes at least a channel change instruction message reception circuit 2-20, a use channel setting circuit 2-21, a radio transmission / reception circuit 2-22, and a network interface circuit 2-19. Furthermore, an interference amount measurement circuit 2-23 may be provided.

  The network interface circuit 2-11 of the management station 1-1 is an interface circuit for the management station 1-1 to communicate with the operator network 1-2 or the operator network 1-3. On the other hand, the network interface circuit 2-17 of the new station 1-4 is an interface circuit for the new station 1-4 to communicate with the management station 1-1, and the network interface circuit 2- of the interference station 1-5. Reference numeral 19 denotes an interface circuit for the interference station 1-4 to communicate with the management station 1-1. The network interface circuit 2-11 of the management station 1-1 can also be connected to a communication network of an operator other than the A operator and the B operator.

<Description of database configuration>
FIG. 3 is a conceptual diagram showing a data structure of the channel use classification table 2-7 according to the present embodiment. As shown in FIG. 3, the channel usage classification table 2-7 includes primary usage channel information indicating channel numbers that each business is permitted to use in each region, and 2 for each business in each region. Stored is system parameter information including at least one or more pieces of information among secondary use channel information indicating channel numbers permitted for the next use. In addition, such information can be rewritten in response to changes in the channel usage environment, such as a change in allocation of usage categories to businesses.

  FIG. 4 is a conceptual diagram showing a data configuration of the radio station table 2-8 according to the present embodiment. In the figure, the radio station table 2-8 stores system parameter information including at least one or more pieces of information regarding the installation status of the radio communication device, device specifications, conditions of the radio communication system, and the like. . As shown in FIG. 4, the system parameter information includes radio station number information, installer information, primary usage channel information, secondary usage channel information, in-use channel information, location information, mobility information, transmittable / receivable channel information, and transmission. It consists of characteristic information, reception characteristic information, required DU ratio information, adjacent channel IRF information, and usage period information.

  The wireless station number information indicates a given unique number for all wireless communication devices. The installer information indicates the installer. The primary usage channel information indicates a channel number that the business operator to be used is permitted for primary usage at the installation point of the wireless communication device. The secondary usage channel information indicates a channel number that the business operator using is allowed to use the secondary at the installation point of the wireless communication device. The in-use channel information indicates a channel number in use.

  The position information indicates the position of the wireless communication device. The mobility information indicates the presence / absence of mobility of the wireless device, the moving speed, the moving range, and the like. The transmission / reception channel information indicates a channel number of a channel capable of transmitting and receiving radio waves in the wireless transmission / reception circuit of the wireless communication device. The transmission characteristic information indicates the transmission characteristic of the wireless communication device. The reception characteristic information indicates the reception characteristic of the wireless communication device. The required DU ratio information indicates a ratio between a desired wave and an interference wave that the wireless communication apparatus requires at a minimum. The adjacent channel IRF information indicates an adjacent channel interference mitigation factor (IRF) of the wireless communication apparatus. The usage period information indicates a channel use start time, a channel use end scheduled time, and the like of the wireless communication apparatus.

  These pieces of information can be rewritten in response to changes in the wireless communication system such as the establishment of a wireless communication device.

  The above-described transmission characteristic information and reception characteristic information are information mainly indicating RF (Radio Frequency) transmission / reception characteristics of the wireless communication device, the transmission characteristic information is used for calculation of the amount of interference, and the reception characteristic information is Used to calculate the amount of interference. Specific examples of each are as follows. That is, the transmission characteristic information is, for example, characteristics such as antenna directivity gain and saturation power of a power amplifier used in a transmission circuit. The reception characteristic information is, for example, characteristics such as antenna directivity gain and saturation power of a low noise amplifier used in the reception circuit.

  FIG. 5 is a conceptual diagram showing a data configuration of the interference table 2-9 according to the present embodiment. In the figure, an interference table 2-9 is created for each wireless communication device, and stores at least system parameter information including one or more pieces of information. As shown in FIG. 5, the system parameter information includes transmission / receivable channel information, total interference amount information, interference channel information, partner station number information, and interference amount information.

  The transmission / reception channel information indicates a channel number of a channel capable of transmitting and receiving radio waves in the wireless transmission / reception circuit of the wireless communication device. The interfered total amount information indicates the total interfered amount received by the wireless communication apparatus in the channel. The interference channel information indicates the channel number at which the channel is interfered. The partner station number information indicates a unique number given to another wireless communication apparatus (hereinafter referred to as partner station) that is using the channel that causes the interference. The interfered amount information indicates an interfered amount that the wireless communication apparatus receives from the partner station.

  These pieces of information can be rewritten in response to changes in the wireless communication system such as the establishment of a wireless communication device.

<Description of operation and sequence of each device component>
Next, an example of the operation of each device component in the wireless communication system according to the present invention will be described in detail.
FIG. 6 is a sequence diagram for explaining the operation of each device component in the wireless communication system according to the present embodiment. When operator A establishes a new station 1-4, the management station 1-1 assigns a channel, the interfering station 1-5 changes the channel used, and the operation until the new station 1-4 uses the channel Will be explained.

  First, the channel assignment request message transmission circuit 2-12 of the newly established station 1-4 sends a channel assignment to the management station 1-1 via the network A circuit 2-17 via the A carrier network 1-2. A request message 6-1 is transmitted (step S6-20). The channel assignment request message receiving circuit 2-2 of the management station 1-1 receives the channel assignment request message 6-1 through the network interface circuit 2-11.

  The channel assignment request message 6-1 includes the carrier information 6-4 indicating the name of the carrier where the newly established station 1-4 is installed, and the specific primary usage channel number for which the use classification of the assigned channel is desired and the assignment is desired. Desired channel information 6-5, transmission / reception channel information 6-6 indicating a channel number capable of transmitting and receiving radio waves according to the specifications of the new station 1-4, and the new station 1-4 Other information 6-7 indicating information such as transmission power, antenna characteristics, and current position is included.

  As an example of the data of the desired channel information 6-5, there are three types of "desired primary use or secondary use", "desired primary use only", and "desired secondary use only". It may include the specific primary usage channel number desired.

  When the management station 1-1 receives the channel assignment request message 6-1 from the newly established station 1-4, the operator information 6-4 and the desired channel information 6-5 included in the channel assignment request message 6-1 can be transmitted and received. Each information of channel information 6-6 and other information 6-7 is extracted (step S6-21). Next, a channel assignment process which is a calculation and determination process for assigning a channel to the newly established station 1-4 is executed (step S6-22). The use channel determination circuit 2-3, which is a circuit for executing the channel assignment process, uses the channel use classification of the operator A who uses the new station 1-4 at the position where the new station 1-4 is installed. Reading from the division table 2-7, the newly established station 1-4 selects a channel that can be used primarily and a channel that can be used secondary, and a primary availability determination circuit 2-4 and a secondary availability determination circuit 2-5. The channel availability determination is performed at.

  The primary availability is determined based on the calculation results of the rearrangement calculation circuit 2-24, the interfered estimation circuit 2-25, and the interference estimation circuit 2-26 included in the primary availability determination circuit 2-4. When this calculation is performed, information included in the channel use classification table 2-7, the radio station table 2-8, and the interference table 2-9 is used.

  Further, the primary availability determination circuit 2-4 includes an interference amount obtained by measurement by the interference amount measurement circuit 2-23 of the interference station 1-5 to be subjected to interference estimation with the newly established station 1-4, and In some cases, the amount of interference obtained by the measurement by the interference amount measuring circuit 2-16 of the new station 1-4 is used. The amount of interference is measured by the interference amount measurement circuit 2-16 of the newly established station 1-4, and the result is transmitted to the interference estimation circuit 2-25 of the management station 1-1 via the A operator network 1-2. Is done. The measurement may be performed not only by the instruction of the management station 1-1 but also by the newly established station 1-4 based on its own judgment. Further, the amount of interference is measured by the interference amount measurement circuit 2-23 of the interference station 1-5, and the result is given through the interference estimation circuit 2-26 of the management station 1-1 via the B operator network 1-3. Sent to. The measurement is performed according to an instruction from the management station 1-1.

  Further, whether or not secondary usage is possible is determined by calculation results in the rearrangement calculation circuit 2-27, the interfered estimation circuit 2-28, and the interference estimation circuit 2-29 included in the secondary usage availability determination circuit 2-5. Determine based on. When this calculation is performed, information included in the channel use classification table 2-7, the radio station table 2-8, and the interference table 2-9 is used.

  Further, the secondary availability determination circuit 2-5 includes an interference amount obtained by measurement by the interference amount measurement circuit 2-23 of the interference station 1-5 to be subjected to interference estimation with the newly established station 1-4, and In some cases, the amount of interference obtained by measurement by the interference amount measuring circuit 2-16 of the newly established station 1-4 is used. The interference amount is measured by the interference amount measurement circuit 2-16 of the newly established station 1-4, and the result is transmitted to the interference estimation circuit 2-28 of the management station 1-1 via the A operator network 1-2. Is done. The measurement may be performed not only by the instruction of the management station 1-1 but also by the newly established station 1-4 based on its own judgment. Further, the amount of interference is measured by the interference amount measurement circuit 2-23 of the interference station 1-5, and the result is given through the interference estimation circuit 2-29 of the management station 1-1 via the B operator network 1-3. Sent to. Measurement is performed under the direction of the management station.

  Based on the determination results of the primary availability determination circuit 2-4 and the secondary availability determination circuit 2-5, the usage channel determination circuit 2-3 determines the final channel assignment and the usage channel of the interference station 1-5. Determine the change. The determined channel assignment information is sent as a channel assignment notice message 6-3 from the channel assignment notice transmission circuit 2-6 through the network interface circuit 2-1, through the A operator network 1-2, and to the newly established station 1-4. (Step S6-24).

  The channel assignment notification message reception circuit 2-13 of the new station 1-4 receives the channel assignment notification message 6-3 via the network interface circuit 2-17, and the use channel setting circuit 2-14 receives the channel assignment notification message. The transmission / reception channel of the wireless transmission / reception circuit 2-15 is set according to the content of 6-3, and the newly established station 1-4 starts communication using the allocated channel (step S6-26). If there is no channel allocated to the newly established station 1-4, the operation is determined in the form of a communication start failure in step S6-26.

  On the other hand, for the interfering station 1-5, the determined use channel change information is sent as a channel change instruction message 6-2 from the channel change instruction message transmission circuit 2-10 via the network interface circuit 2-11. It is transmitted via the B operator network 1-3 (step S6-23). The channel change instruction message reception circuit 2-20 of the interference station 1-5 receives the channel change instruction message 6-2 via the network interface circuit 2-19, and the use channel setting circuit 2-21 receives the channel change instruction. The transmission / reception channel of the radio transmission / reception circuit 2-22 is set according to the content of the message 6-2, and the interference station 1-5 uses the designated channel to be changed (step S6-25).

  In the channel change instruction message 6-2, the interfering station 1-5 may be instructed to stop using it. In that case, the interference station 1-5 stops the radio wave transmission by the radio transmission / reception circuit 2-22 and stops using the channel in step S6-25. Further, when there is no wireless transmission device that interferes with the newly established station 1-4, that is, when there is no interference station 1-5, Steps S6-23 and S6-25 are not executed.

<Glossary>
In the following description, the name “interference station” is used for a wireless communication apparatus that meets certain conditions. When a certain channel C is allocated to the new station 1-4, an existing wireless communication apparatus that interferes with the new station 1-4 is referred to as a “first stage interference station of the new station 1-4 on the allocated channel C”. To do. When the channel is changed according to the channel rearrangement pattern P for the existing wireless communication device, the existing interference with the k-th interfering station <X> when the k-th interfering station <X> changes the channel. The wireless communication device is referred to as “<X> (k + 1) stage interfering station in rearrangement pattern P”. Here, k is an integer of 0 or more. In the case of k = 0, the pattern P represents the channel assignment pattern for the newly established station 1-4, and the newly established station 1-4 corresponds to the “0th stage interference station”. The channel rearrangement pattern is information indicating a combination of a channel assigned to a newly established station and a change destination channel of each interference station.

B. First Embodiment Next, a first embodiment of the present invention will be described.
<Channel allocation process: Step S6-22>
FIG. 7 is a flowchart showing an example of the channel assignment process S6-22 according to the first embodiment. In the channel assignment process (step S6-22), first, the operator who has established the newly established station based on the information extracted in step S6-21 (the current location included in the operator information 6-4 and other information 6-7). The channel usage category A is read from the channel usage category table (step S7-3).

<Primary availability determination: steps S7-5 to S7-7>
Next, when the desired channel information 6-5 is "desired to use primary or secondary usage" or the desired channel information 6-5 is "desired to use only primary usage", the channel information 6- 6 and the information read out in step S7-3, among the channels that can transmit and receive radio waves according to the equipment specifications of the newly established station, the channel candidates that are newly used by the newly established station are extracted (step 1). S7-4). This is indicated by the primary usage channel information in the channel usage category read out in step S7-3, and among the channels that are allowed primary usage by the operator that has installed the new station, the transmission / reception channel information 6- This is performed by extracting a channel indicated by 6 that is a channel that can be transmitted / received by the newly established station and that is a primary use channel desired by the newly established station, as indicated by the desired channel information 6-5. Then, the primary use possibility determination (steps S7-5 to S7-7) is performed on the extracted channel candidates to be primarily used by the newly established station.

  First, a primary availability determination (step S7-5) is performed when channel rearrangement is not performed. If it is determined that primary availability is possible ("Yes" in step S7-5), "Primary available channel" It is determined that there exists (step S7-14). A detailed processing method for determining whether primary usage is possible will be described later.

  If it is determined that the range of channel rearrangement needs to be expanded (“relocation range expansion” in step S7-5), the channel used by the first stage interfering station is rearranged, and the primary availability determination is performed again. Do.

  .., Np (Np is a natural number), and the primary availability determination will be generalized and described. When the primary communication availability determination (step S7-6) is performed with the wireless communication apparatus to be relocated up to the k-th interfering station as the primary communication availability is determined ("Yes" in step S7-6) ) Determines that “there is a primary usable channel” (step S 7-14). On the other hand, when it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S7-6), the wireless communication apparatus to be rearranged is set to the k + 1 stage interfering station. Next availability judgment is performed.

  Here, Np is a parameter that can be arbitrarily set in the wireless communication system, and may be a constant, or may be a variable that varies depending on channel usage conditions, agreements between providers, and the like. The target range of channel rearrangement is to determine whether or not the primary use is possible up to the maximum Np-stage interference station (step S7-7). In the primary use availability determination (step S7-7) where the wireless communication apparatus to be relocated is up to the Np-th stage interfering station (step S7-7), “possible” in step S7-7 In the case where it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S7-7), it is also determined that “there is a primary usable channel” (step S7-14). The relocation range is not expanded.

  If it is determined in step S7-5 that the primary use is not possible ("impossible" in step S7-5), if the desired channel information 6-5 is "desired to use primary or secondary use", a new one is provided. Of the channels that can transmit and receive radio waves according to the equipment specifications of the newly established station, based on the station transmission / reception channel information 6-6 and the information read in step S7-3, the channel that is newly used by the newly established station Candidates are extracted (step S7-10), secondary availability is determined (steps S7-11 to S7-13), and if the desired channel information 6-5 is "only primary usage is desired", then "usable" "No channel" is determined (step S7-16).

<Secondary availability determination: steps S7-11 to S7-13>
Next, when the desired channel information 6-5 is "desired to use primary or secondary usage" or the desired channel information 6-5 is "desired to use only secondary usage", the channel information 6- 6 and the information read out in step S7-3, among the channels that can transmit and receive radio waves according to the equipment specifications of the newly established station, the channel candidates that are newly used by the newly established station are extracted (steps). S7-10). This is indicated by the secondary usage channel information in the channel usage classification read out in step S7-3, and among the channels that are allowed secondary usage by the operator who installed the newly established station, the transmission / reception channel information 6- 6 by extracting a channel that can be transmitted / received by the newly established station, and further extracting a secondary usage channel that can be used in the equipment specifications of the newly established station, as indicated by the radio station table 2-8, Do. Then, secondary availability determination (steps S7-11 to S7-13) is performed on the extracted channel candidates that are newly used by the newly established station.

  First, secondary availability determination (step S7-11) when channel rearrangement is not performed is performed, and when secondary availability is determined ("Yes" in step S7-11), "secondary available channel" It is determined that it is present (step S7-15). Note that a detailed processing method of the secondary availability determination will be described later.

  Further, when it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S7-11), the channel used by the first stage interfering station is rearranged, and the secondary availability determination is performed. .

  k = 1, 2, 3,..., Nt (Nt is a natural number), and the secondary availability determination will be generalized and described. When the secondary communication availability determination (step S7-12) is performed with the wireless communication device to be relocated up to the k-th interfering station as the secondary communication availability is determined ("Yes" in step S7-12) ) Is determined as “there is a secondary usable channel” (step S7-15). On the other hand, if it is determined that the range of channel rearrangement needs to be expanded (“relocation range expansion” in step S7-12), the wireless communication apparatus to be rearranged is set up to the (k + 1) -th stage interference station. Next availability judgment is performed.

  Here, Nt is a parameter that can be arbitrarily set in the wireless communication system, and may be a constant, or may be a variable that changes depending on channel usage conditions, agreements between providers, and the like. The target range of channel rearrangement is determined up to the maximum Nt-th stage interfering station, and secondary availability determination is executed (step S7-13).

  If it is determined in steps S7-11 to S7-13 that the secondary use is not possible ("impossible" in steps S7-11 to S7-13), it is determined that there is no usable channel (step S7- 16).

<Processing based on determination result: Step S7-20>
When it is determined that “there is a primary usable channel” (step S 7-14) and “the secondary usable channel is present” (step S 7-15), there are a plurality of channel rearrangement patterns. Therefore, one channel rearrangement pattern is selected from among them according to a predetermined selection criterion (step S7-20). Simultaneously with the rearrangement pattern selection, an allocation channel to the newly established station 1-4 is determined, and the channel allocation process is terminated. As an example of the above selection criteria, the following conditions can be considered.

<Channel relocation pattern selection criteria: Apply conditions in order of priority in bullet order>
1. The number of wireless communication devices that will be suspended is small (when the channel allocated to the new station is the primary channel)
2. 2. The number of wireless communication devices that change channels is small. Less interference from new stations

  For example, if there are three channel rearrangement patterns as shown in FIG. 8 as a result of the determination of primary availability to a newly established station, the rearrangement pattern number “2” is selected according to the above selection criteria. It becomes. On the other hand, if it is determined that “no available channel” (step S7-16), the channel allocation process is terminated.

C. Second Embodiment Next, a second embodiment of the present invention will be described.
<Channel allocation process: Step S6-22>
9 and 10 are flowcharts showing an example of the channel assignment processing S6-22 according to the second embodiment. There are two types of secondary usage channels: free channels where primary use is not permitted for any operator, and other channels where primary use is allowed for operators other than operator A It is divided into. The other party's channel is likely to require secondary use suspension or channel change due to the emergence of a new station that primarily uses the channel, so it is free to use more stably. It is effective to assign channels with priority. Therefore, in the second embodiment, the availability determination of the secondary usage channel is performed separately for the free channel and the other channel.

  In the channel allocation process (step S6-22), first, the channel usage category of the operator A who installed the new station is read from the channel usage category table based on the information extracted in step S6-21 (step S9-3).

<Primary availability determination: steps S9-5 to S9-7>
Next, when the desired channel information 6-5 is "desired to use primary or secondary usage" or the desired channel information 6-5 is "desired to use only primary usage", the channel information 6- 6 and the information read out in step S9-3, among the channels that can transmit and receive radio waves according to the equipment specifications of the new station, channel candidates that are newly used by the new station are extracted (steps). S9-4) Primary availability determination (steps S9-5 to S9-7) is performed.

  First, a primary availability determination (step S9-5) is performed when channel rearrangement is not performed, and when it is determined that primary availability is possible (“Yes” in step S9-5), “primary available channel” It is determined that it is present (step S9-14). A detailed processing method of primary availability determination will be described later. On the other hand, when it is determined that the range of channel rearrangement needs to be expanded (“relocation range expansion” in step S9-5), the channel used by the first stage interfering station is rearranged, and the primary availability determination is performed again. Do.

  .., Np (Np is a natural number), and the primary availability determination will be generalized and described. When the primary communication availability determination (step S9-6) is performed with the wireless communication device to be relocated up to the k-th interfering station as the primary communication availability is determined ("Yes" in step S9-6) ) Is determined as “there is a primary usable channel” (step S9-14). On the other hand, when it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S9-6), the wireless communication device to be rearranged is set to the (k + 1) -th stage interference station. Next availability judgment is performed.

  Here, as described above, Np is a parameter that can be arbitrarily set in the wireless communication system, and may be a constant, or a variable that changes depending on channel usage conditions, agreements between operators, and the like. There may be. The target range of channel rearrangement is to determine whether or not the primary use is possible up to the maximum Np-stage interference station (step S9-7). In the primary use availability determination (step S9-7) in which the wireless communication device to be relocated is up to the Np-th stage interfering station (step S9-7), it is determined that the primary use is possible ("Yes" in step S9-7). However, when it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S9-7), it is determined that “there is a primary usable channel” (step S9-14). The relocation range is not expanded.

  If it is determined in step S9-5 that the primary use is not possible (“impossible” in step S9-5), if the desired channel information 6-5 is “desired to use primary or secondary use”, a new one is provided. Of the channels that can transmit and receive radio waves according to the equipment specifications of the newly established station, based on the station transmission / reception channel information 6-6 and the information read in step S9-3, the channel that is newly used by the newly established station Candidates are extracted (step S9-19), secondary channel availability determination (steps S9-8 to S9-10) is performed, and if the desired channel information 6-5 is "only primary usage is desired" It is determined that “no available channel” (step S9-16).

<Determining whether or not a secondary channel is available for use: Steps S9-8 to S9-10>
Next, when the desired channel information 6-5 is "desired to use primary or secondary usage" or the desired channel information 6-5 is "desired to use only secondary usage", the channel information 6- 6 and the information read out in step S9-3, among the channels that can transmit and receive radio waves according to the equipment specifications of the newly established station, channel candidates that are newly used by the newly established station are extracted (steps). (S9-19) Secondary availability determination (steps S9-8 to S9-10) is performed.

  First, secondary availability determination (step S9-8) when channel rearrangement is not performed is performed, and when secondary availability is determined (“enabled” in step S9-8), “secondary available channel” It is determined that it is present (step S9-15). Note that a detailed processing method of the secondary availability determination will be described later.

  If it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S9-8), the channel used by the first stage interfering station is rearranged, and the secondary availability determination is performed. .

  Here, k = 1, 2, 3,..., Nf (Nf is a natural number), and the secondary channel availability determination of the free channel will be generalized and described. When the secondary communication availability determination (step S9-9) is performed with the wireless communication device to be relocated up to the k-th interfering station as the secondary communication availability is determined ("Yes" in step S9-9) ) Is determined that “there is a secondary usable channel” (step S9-15). On the other hand, if it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S9-9), the wireless communication devices to be rearranged are set to the k + 1-th stage interfering station. Next availability judgment is performed.

  Here, Nf is a parameter that can be arbitrarily set in the wireless communication system, and may be a constant, or may be a variable that changes depending on channel usage conditions, agreements between providers, and the like. The channel relocation target range is up to the maximum Nf-th stage interfering station, and secondary availability determination is executed (step S9-10).

  If it is determined in steps S9-8 to S9-10 that the secondary use is not possible ("impossible" in steps S9-8 to S9-10), channel information 6-6 for the newly established station and step Based on the information read in S9-3, candidates for the other channel that is newly used by the new station are extracted from the channels that can transmit and receive radio waves according to the specifications of the new station (step S9-). 20) The secondary channel availability determination (steps S9-11 to S9-13) of the other person channel is performed.

<Second party channel availability determination: steps S9-11 to S9-13>
First, secondary availability determination (step S9-11) when channel rearrangement is not performed is performed, and when secondary availability is determined (“permitted” in step S9-11), “secondary usage” is determined. It is determined that there is a possible channel (step S9-15). Note that a detailed processing method of the secondary availability determination will be described later.

  If it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S9-11), the channel used by the first stage interfering station is rearranged, and the secondary availability determination is made. I do.

  Here, k = 1, 2, 3,..., Nt (Nt is a natural number) and the secondary channel availability determination of the other person channel will be generalized and described. When the secondary communication availability determination (step S9-12) is performed with the wireless communication device to be relocated up to the k-th stage interfering station as the secondary availability is determined ("Yes" in step S9-12) ) Is determined that “there is a secondary usable channel” (step S9-15). On the other hand, if it is determined that the channel rearrangement range needs to be expanded (“relocation range expansion” in step S9-12), the wireless communication device to be rearranged is set to the (k + 1) -th stage interference station. Next availability judgment is performed.

  Here, Nt is a parameter that can be arbitrarily set in the wireless communication system, and may be a constant, or may be a variable that changes depending on channel usage conditions, agreements between providers, and the like. The target range of channel rearrangement is to determine whether or not secondary use is possible up to the maximum Nt stage interfering station (step S9-13).

  If it is determined in steps S9-11 to S9-13 that the secondary use is not possible ("impossible" in steps S9-11 to S9-13), it is determined that there is no usable channel (step S9- 16).

  As described above, in the secondary availability determination of the second embodiment, secondary usage is suspended due to interference with the primary usage wireless communication device of another provider by giving priority to the free channel and secondary usage. Or the possibility of channel change can be reduced.

D. Processing Common to First Embodiment and Second Embodiment Next, a processing method of primary availability determination and secondary availability determination that is a common part of the above-described first embodiment and second embodiment will be described.

<Primary availability determination>
FIG. 11 is a flowchart illustrating an example of primary availability determination processing when channel rearrangement of the k-th interfering station according to the present embodiment is performed. First, all the channel rearrangement patterns that can be considered combinatorially for the k-th stage interfering station (k = 0, 1, 2,...) Are listed, and for example, identification numbers such as consecutive integers are given (step). S11-1). However, when k = 0, since the k-th stage interfering station corresponds to the newly established station 1-4, the channel rearrangement pattern, that is, the channel allocation pattern for the newly established station 1-4, is “new station 1-4. Exclude the pattern of “suspended use”. Next, the channel rearrangement pattern having the youngest identification number is selected as an interference estimation target (step S11-2).

  Next, using the information included in the channel use classification table 2-7, the radio station table 2-8, and the interference table 2-9, the channel is changed in the channel rearrangement pattern, and for all k-th stage interfering stations, The interference and the interference are estimated (step S11-3). Next, the following determination processing is performed based on the interference estimation result.

  It is determined whether or not the rearrangement pattern corresponds to a rearrangement pattern in which the use of the k-th stage interfering station is not stopped and a (k + 1) -th stage interfering station does not exist as a result of interference amount estimation (step S11-4) If it is determined that it corresponds, it is determined that “(1) the channel rearrangement pattern is appropriate” (step S11-7). On the other hand, if it is determined not to be applicable, it is determined whether or not the k-th interfering station does not interfere with the primary use wireless communication device (step S11-5), and it is determined that the interference is caused. Is determined as “(3) the channel rearrangement pattern is inappropriate” (step S11-9).

  On the other hand, when it is determined that no interference is given, it is further determined whether or not the total amount of interference received by the k-th interfering station from the primary use wireless communication device is within an allowable range (step S11-6). If it is determined that it is not within the allowable range, it is determined that “(3) the channel rearrangement pattern is inappropriate” (step S11-9). Further, when it is determined that the value is within the allowable range, it is determined that “(2) there is a possibility if further channel rearrangement is performed” (step S11-8).

  When the determination results (1) to (3) above are obtained for the channel rearrangement pattern, it is determined whether or not the determination has been completed for all channel rearrangement patterns (step S11-10). If not, another channel rearrangement pattern is set as a determination target (step S11-17), and the interference and the interference are estimated for all k-th stage interfering stations (step S11-3).

  On the other hand, if completed, it is determined whether or not there is a rearrangement pattern determined as “(1) the channel rearrangement pattern is appropriate” (step S11-11), and there is a corresponding rearrangement pattern. In this case, it is determined that “primary use is possible” (step S11-16), and the process ends.

On the other hand, if there is no corresponding rearrangement pattern, it is determined whether or not there is a rearrangement pattern determined as “(2) possibility of further channel rearrangement” (step S11-12). If there is a rearrangement pattern to be performed, it is determined as “rearrangement range expansion” (step S11-14), and the process ends.
On the other hand, if there is no corresponding rearrangement pattern and k = 0, it is determined that “primary use is not possible” (step S11-15), and if k ≧ 1, it is determined that “relocation range expansion” (step S11-15). S11-14), the process ends.

<Secondary availability determination>
Next, the processing method of secondary availability determination will be described.
FIG. 12 is a flowchart illustrating an example of secondary availability determination processing when channel rearrangement of the k-th interfering station according to the present embodiment is performed. First, all the channel rearrangement patterns that can be considered combinatorially for the k-th stage interfering station (k = 0, 1, 2,...) Are listed, and for example, identification numbers such as consecutive integers are given (step). S12-1). However, unlike the above-described primary availability determination, the use of the interference station is not stopped.

  First, the channel rearrangement pattern having the youngest identification number is selected as an interference estimation target (step S12-2). Next, in the channel rearrangement pattern, channel change is performed, and the interference and the interference are estimated for all k-th stage interfering stations (step S12-3). Next, the following determination processing is performed based on the interference estimation result.

  In the rearrangement pattern, it is determined whether there is no (k + 1) -th stage interfering station as a result of interference amount estimation (step S12-4). It is determined that the rearrangement pattern is appropriate ”(step S12-7). On the other hand, if it is determined that it exists, it is determined whether or not the k-th stage interfering station does not interfere with the primary use wireless communication device (step S12-5). Determines that “(3) the channel rearrangement pattern is inappropriate” (step S12-9).

  If it is determined that no interference is given, it is further determined whether or not the total amount of interference received by the k-th interfering station from the primary use wireless communication device is within an allowable range (step S12- 6) When it is determined that it is not within the allowable range, it is determined that “(3) the channel rearrangement pattern is inappropriate” (step S12-6). On the other hand, if it is determined that it is within the allowable range, it is determined that “(2) there is a possibility if further channel rearrangement is performed” (step S12-8).

  When the determination results (1) to (3) above are obtained for the channel rearrangement pattern, it is determined whether or not the determination has been completed for all channel rearrangement patterns (step S12-10). If not, another channel rearrangement pattern is set as a determination target (step S12-17), and the interference and the interference are estimated for all k-th stage interfering stations (step S12-3).

  On the other hand, if completed, it is determined whether or not there is a rearrangement pattern determined as “(1) the channel rearrangement pattern is appropriate” (step S12-11), and there is a corresponding rearrangement pattern. In this case, it is determined that “secondary use is possible” (step S12-16), and the process ends.

  On the other hand, if there is no corresponding rearrangement pattern, it is determined whether or not there is a rearrangement pattern determined as “(2) possibility of further channel rearrangement” (step S12-12). If there is a rearrangement pattern to be determined, it is determined whether k is less than or equal to the upper limit of the rearrangement stage number (Nf or Nt in FIGS. 7 and 9) (step S12-13). Is determined to be “rearrangement range expansion” (step S12-14), and the process ends. On the other hand, when the upper limit of the rearrangement stage number is exceeded, it is determined that “secondary use is not possible” (step S12-15), and the process is terminated (step S12-15).

  Further, in step S12-12, if there is no rearrangement pattern determined as “(2) possibility of further channel rearrangement”, it is determined as “secondary unavailable” (step S12-15). ), The process ends (step S12-15).

  As described above, according to the present embodiment, primary usage, which is a usage category that can use a channel preferentially, and usage categories that can be borrowed and used when the channel is not used. In a wireless communication system that operates in a frequency band in which channel use sections having different priorities, such as secondary use, are set, channel allocation and channel rearrangement reflecting the difference in channel use sections can be performed. In other words, it is possible to borrow a frequency band that has not been used for secondary use, to effectively use frequency resources, and to reduce the suspension of use of a wireless communication device that secondary uses a channel. A wireless communication service can be provided, and as a result, more effective use of frequencies can be realized.

  Also, channel allocation can be performed in both cases where the wireless communication apparatus uses the channel primarily and when it uses the channel primarily. Further, by analyzing the content of the channel assignment request message received from the wireless communication apparatus by the management station, it is possible to perform channel assignment reflecting the desire of the wireless communication apparatus.

As described above, according to the present embodiment, since channel rearrangement processing that reflects the difference in channel use division is performed, channel rearrangement is possible even in a wireless communication device system that secondary uses channels. Since the suspension of use of the wireless communication device that is secondarily used is reduced, a stable wireless communication service can be provided, and as a result, further effective use of frequencies can be realized.
In addition, since it is possible to flexibly set the size of channel relocation, that is, the number of wireless communication devices to be relocated, the frequency according to the channel usage status and the power relationship between operators in the channel usage category, etc. It is easy to make a trade-off between effective use and channel change cost. In addition to the two types of channel usage divisions, primary usage and secondary usage, the scale of channel rearrangement can be flexibly set according to the priority of the channel usage division when it becomes more complicated. It is easy to ensure fairness of channel use opportunities. In addition, it is possible to perform channel relocation with high feasibility according to the system cost and the real-time property required for the system.

  Note that a program for realizing the function of the processing unit in the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to perform channel assignment. May be. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” means a volatile memory (RAM) inside a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. As described above, it is assumed that the program is held for a certain period of time.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

It is a block diagram which shows the structural example of the radio | wireless communications system by this embodiment. It is a figure which shows an example of a structure and connection of each apparatus by this embodiment. It is a conceptual diagram which shows the data structure of the channel utilization division table 2-7 by this embodiment. It is a conceptual diagram which shows the data structure of the radio station table 2-8 by this embodiment. It is a conceptual diagram which shows the data structure of the interference table 2-9 by this embodiment. It is a sequence diagram for demonstrating operation | movement of each apparatus component in the radio | wireless communications system by this embodiment. It is a flowchart which shows an example of channel allocation process S6-22 by 1st Embodiment. Result of primary availability determination to new station It is a flowchart which shows an example of the channel allocation process S6-22 by this 2nd Embodiment. It is a flowchart which shows an example of the channel allocation process S6-22 by this 2nd Embodiment. It is a flowchart which shows an example of the process of a primary availability determination in the case of performing channel rearrangement of the k-th stage interference station by this embodiment. It is a flowchart which shows an example of the process of a secondary use availability determination in the case of performing channel rearrangement of the k-th stage interference station by this embodiment.

Explanation of symbols

1-1 Management station (management station equipment)
1-2 A carrier network 1-3 B carrier network 1-4 Newly established station (wireless communication equipment)
1-5 Interfering station (existing wireless communication device)
2-2 Channel assignment request message reception circuit 2-3 Use channel determination circuit 2-4 Primary use availability determination circuit 2-5 Secondary use availability determination circuit 2-6 Channel assignment notification transmission circuit 2-7 Channel use classification table 2 -8 Radio station table 2-9 Interference table 2-10 Channel change instruction message transmission circuit 2-11 Network interface circuit 2-24, 2-27 Relocation calculation circuit 2-25, 2-28 Interference estimation circuit 2-26 , 2-29 interference estimation circuit 2-12 channel allocation request message transmission circuit 2-13 channel allocation notification message reception circuit 2-14 use channel setting circuit 2-15 wireless transmission / reception circuit 2-16 interference amount measurement circuit 2-17 network Interface circuit 2-19 Network interface circuit 2-20 Channel change instruction Message reception circuit 2-21 available channel setting circuit 2-22 wireless transceiver circuit 2-23 interference amount measurement circuit

Claims (14)

A channel usage category is set that has a difference in priority between primary usage, which is a usage category that can be used preferentially, and secondary usage, which is a usage category that can be borrowed when not used elsewhere. A channel assignment method using a plurality of wireless communication devices capable of communicating using a channel in a certain frequency band and changing the channel to be used, and a management station device that assigns a channel to each of the wireless communication devices There,
The wireless communication device is
A channel request for transmitting to the management station device a channel assignment request message including at least one of channel use category information indicating a channel use category desired by the own device and desired channel information indicating a channel number desired by the own device. Sending process,
Receiving a channel assignment notification message including information of the assigned channel from the management station apparatus, and starting a channel utilization process for starting wireless communication by the assigned channel;
When a channel is used in the secondary use channel use section, a channel change instruction message is received from the management station apparatus for instructing to change the used channel or stop using the channel, and the channel change instruction message A channel change process for changing the use channel to the channel indicated by or stopping the use, and
The management station device is
Based on the content of the channel assignment request message received from the wireless communication device, the channel for each usage category that is permitted to be used in advance for the wireless communication device, and the wireless environment information held by the device itself, the wireless communication A channel selection process for selecting a channel to be assigned to a device and determining a method for rearranging a channel used by an existing wireless communication device;
A channel change instruction transmission process for transmitting the channel change instruction message to a wireless communication apparatus that is required to change or stop the use of a channel in use based on the determination result in the channel selection process;
A channel allocation notification transmission step of transmitting the channel allocation notification message to the wireless communication device based on a selection result of the channel selection step. The management station device is
When primary use and secondary use request are set in the channel use classification information of the channel assignment request message, all the primary use channels that can be used by the wireless communication device, or the channel assignment request message A primary availability determination process for performing primary availability determination while allowing rearrangement of usage channels for existing wireless communication devices for the included desired channels;
As a result of the determination in the primary availability determination process, if there is no primary usable channel, all the secondary usage channels that can be used by the wireless communication device are rearranged for the existing wireless communication device. A secondary availability determination process for performing secondary availability determination while allowing
The channel assignment notification transmission process includes:
If there is a primary usable channel as a result of the determination in the primary availability determination process, the optimum channel is allocated as primary usage, and the channel is allocated according to the primary usage category. When a secondary usable channel is found as a result of determination in the secondary availability determination process, an optimal channel is allocated as secondary usage, and the notification message is transmitted to the wireless communication device. When a channel allocation notification message indicating that a channel is allocated in a secondary usage category is transmitted to the wireless communication device, and as a result of determination in the secondary availability determination process, when there is no secondary available channel, A channel assignment notification message indicating that channel assignment is impossible is transmitted to the wireless communication device;
The channel change instruction transmission process includes:
In the primary availability determination process or the secondary availability determination process, if it is determined that the existing wireless communication device needs to be relocated, a channel change instruction message is sent to the corresponding wireless communication device. The channel allocation method according to claim 1, wherein transmission is performed. The management station device is
If the channel usage classification information of the channel assignment request message does not set the secondary usage request and the primary usage request is set, all the 1s that can be used by the wireless communication apparatus are set. There is further provided a primary availability determination process for determining primary availability while permitting rearrangement of usage channels for an existing wireless communication apparatus with respect to a next usage channel or a desired channel included in the channel assignment request message. And
The channel assignment notification transmission process includes:
If there is a primary usable channel as a result of the determination in the primary availability determination process, the optimum channel is allocated as primary usage, and the channel is allocated according to the primary usage category. A channel assignment notification message indicating that channel assignment is impossible if there is no primary usable channel as a result of the determination in the primary availability determination process. Sending a message to the wireless communication device;
The channel change instruction transmission process includes:
The channel change instruction message is transmitted to the corresponding wireless communication device when it is determined in the primary availability determination process that the use channel rearrangement of the existing wireless communication device is necessary. Item 2. The channel allocation method according to Item 1. The management station device is
If the channel use classification information of the channel assignment request message does not set the primary use request and the secondary use request is set, all the 2 available to the wireless communication apparatus are available. A secondary use availability determination process for performing secondary use availability determination while permitting rearrangement of the use channel with respect to the existing wireless communication device for the next use channel;
The channel assignment notification transmission process includes:
As a result of the determination in the secondary availability determination process, if there is a secondary usable channel, the most suitable channel is allocated as secondary usage, and the channel is allocated according to the secondary usage classification. A channel assignment notification message indicating that channel assignment is not possible when there is no secondary usable channel as a result of the determination in the secondary availability determination process. Sending a message to the wireless communication device;
The channel change instruction transmission process includes:
The channel change instruction message is transmitted to the corresponding wireless communication device when it is determined in the secondary availability determination process that the use channel rearrangement of the existing wireless communication device is necessary. Item 2. The channel allocation method according to Item 1. The primary availability determination process includes:
Interference estimation for estimating interference and estimating interference for all primary usage channels that can be used by the wireless communication apparatus or primary usage channels indicated by desired channel information included in the channel assignment request message Process,
As a result of the determination in the interference estimation process, use based on the difference in use category with respect to another wireless communication device having a problem of interference or interference directly or indirectly with the wireless communication device If it is determined that there is a possibility that the wireless communication apparatus can primarily use the channel if channel rearrangement is performed, the rearrangement of the used channel of the other wireless communication apparatus is assumed, and the interference estimation process is performed again. Channel relocation pattern calculation process to be performed,
As a result of determination in the interference estimation process, when it is determined that there is no interference problem by applying a predetermined rearrangement pattern, a primary that determines that a channel according to the predetermined rearrangement pattern is primarily usable The final decision process of availability,
The channel allocation method according to claim 2 or 3, characterized by comprising: The secondary availability determination process includes:
An interference estimation process for estimating interference and estimating interference for all secondary usage channels available to the wireless communication device;
As a result of the determination in the interference estimation process, use based on the difference in use category with respect to another wireless communication device having a problem of interference or interference directly or indirectly with the wireless communication device If it is determined that there is a possibility that the wireless communication apparatus can secondary use the channel if channel rearrangement is performed, the rearrangement of the used channel of the other wireless communication apparatus is assumed, and the interference estimation process is performed again. Channel relocation pattern calculation process to be performed,
As a result of determination in the interference estimation process, when it is determined that there is no interference problem by applying a predetermined rearrangement pattern, a secondary that determines that a channel according to the predetermined rearrangement pattern is secondary usable The final decision process of availability,
The channel allocation method according to claim 2 or 4, characterized by comprising: The secondary availability determination process includes:
Among all the secondary usage channels that can be used by the wireless communication device, interference estimation and interference estimation are performed for a free channel that does not have an operator or a wireless communication system that can be used as a primary usage channel. A first interference estimation process;
As a result of the determination in the first interference estimation process, the difference in use category is different from other wireless communication devices that have a problem of interference or interference directly or indirectly with the wireless communication device. If it is determined that there is a possibility that the wireless communication apparatus can secondary use the free channel if the use channel rearrangement based on the above is performed, the rearrangement of the use channel of the other radio communication apparatus is assumed, and A first channel rearrangement pattern calculation process for performing the first interference estimation process;
As a result of the determination in the first interference estimation process, when it is determined that there is no interference problem by applying the rearrangement pattern obtained in the first channel rearrangement pattern calculation process, the channel is secondary A first secondary availability determination process for determining availability;
As a result of the determination in the first interference estimation process, when it is determined that there is no secondary usable channel in the free channel, the channel is changed to a second party channel other than the free channel. On the other hand, a second interference estimation process for estimating interference and estimating interference,
As a result of the determination in the second interference estimation process, the difference in use category is different from other wireless communication devices that have a problem of interference or interference directly or indirectly with the wireless communication device. If it is determined that there is a possibility that the wireless communication device can secondary use the other person's channel if the use channel rearrangement based on the above is performed, the rearrangement of the use channel of the other wireless communication device is assumed, Again, a second channel rearrangement pattern calculation process for performing the second interference estimation process;
As a result of the determination in the second interference estimation process, when it is determined that there is no interference problem by applying the rearrangement pattern obtained in the first channel rearrangement pattern calculation process, A second secondary availability final determination process for determining secondary availability;
The channel allocation method according to claim 2 or 4, characterized by comprising: The wireless environment information is
Primary usage channel information indicating the channel number for which each business operator is permitted primary use in each region, and secondary usage channel information indicating the channel number for which each business operator is permitted secondary usage in each region And a channel usage classification table storing information including at least one or more pieces of information as information about the channel usage classification in a specific region as system parameter information,
For all wireless communication devices, wireless communication device number information indicating a given unique number, installer information indicating an installation business operator, and a primary use of a business operator to be used are permitted at the installation location of the wireless communication device. Primary usage channel information indicating the channel number being used, secondary usage channel information indicating the channel number that the business operator using is allowed to use secondary at the installation location of the wireless communication device, and the channel number being used Used channel information indicating position, position information indicating the position of the wireless communication device, mobility information indicating one or more of the mobility presence / absence, moving speed, and movement range of the wireless communication device, and wireless of the wireless communication device Transmission / reception channel information indicating a channel number of a channel capable of transmitting and receiving radio waves in the transmission / reception circuit, transmission characteristic information indicating transmission characteristics of the wireless communication apparatus, and reception characteristics of the wireless communication apparatus Reception characteristic information indicating, required DU ratio information indicating a ratio of a desired wave and an interference wave required at least by the wireless communication device, adjacent channel IRF information indicating an adjacent channel interference reduction coefficient of the wireless communication device, One or more of the information regarding the installation status of the wireless communication device, the device specifications, and the conditions of the wireless communication system, with the usage period information indicating one or more of the channel use start time and the channel use end scheduled time of the wireless communication device A radio station table storing information including at least information as system parameter information;
For all wireless communication devices, transmission / reception channel information indicating the channel number of a channel capable of transmitting and receiving radio waves in the wireless transmission / reception circuit of the wireless communication device, and the total interference received by the wireless communication device in the channel. Interference channel information indicating the total interference amount information, interference channel information indicating the channel number at which the channel is interfered, and a partner station number indicating a unique number given to the partner station which is another wireless communication apparatus that is using the channel causing the interference Interference in which information including at least one or more pieces of information related to interference of the wireless communication device of information and interference amount information indicating the amount of interference received from the other station by the wireless communication device is stored as system parameter information A channel allocation method according to any one of claims 1 to 7, wherein a table is stored. A channel usage category is set that has a difference in priority between primary usage, which is a usage category that can be used preferentially, and secondary usage, which is a usage category that can be borrowed when not used elsewhere. A wireless communication system using a plurality of wireless communication devices capable of communicating using a channel in a certain frequency band and changing the channel to be used, and a management station device that assigns a channel to each of the wireless communication devices. There,
The wireless communication device
A channel request for transmitting to the management station device a channel assignment request message including at least one of channel use category information indicating a channel use category desired by the own device and desired channel information indicating a channel number desired by the own device. A transmission means;
Channel utilization start means for receiving a channel assignment notification message including information on the assigned channel from the management station apparatus and starting wireless communication by the assigned channel;
When a channel is used in the secondary use channel use section, a channel change instruction message is received from the management station apparatus for instructing to change the used channel or stop using the channel, and the channel change instruction message Channel changing means for changing the use channel to the channel indicated by or stopping the use,
The management station device
Based on the content of the channel assignment request message received from the wireless communication device, the channel for each usage category that is permitted to be used in advance for the wireless communication device, and the wireless environment information held by the device itself, the wireless communication A channel selection means for selecting a channel to be allocated to the apparatus and determining a method for rearranging a channel used by the existing wireless communication apparatus;
Channel change instruction transmission means for transmitting the channel change instruction message to a wireless communication apparatus that needs to change or stop using the channel being used based on the selection result by the channel selection means;
A wireless communication system comprising: channel assignment notification transmission means for transmitting the channel assignment notification message to the wireless communication device based on a selection result by the channel selection means. A channel usage category is set that has a difference in priority between primary usage, which is a usage category that can be used preferentially, and secondary usage, which is a usage category that can be borrowed when not used elsewhere. A management station device that allocates a channel to each of a plurality of wireless communication devices capable of communicating using a channel in a certain frequency band and changing the channel to be used;
Channel assignment including at least one or more of channel usage classification information indicating a channel usage classification desired by the wireless communication device and desired channel information indicating a channel number desired by the wireless communication device, received from the wireless communication device Select a channel to be allocated to the wireless communication device based on the contents of the desired message, the channel for each usage category that is permitted to be used in advance for the wireless communication device, and the wireless environment information held by the own device. Channel selection means for determining a method of rearranging the channels used by the wireless communication device;
If a channel is being used in the secondary usage channel usage section for a wireless communication device that needs to change or stop using the channel being used based on the selection result by the channel selection means, the channel being used A channel change instruction transmission means for transmitting a channel change instruction message for instructing to change or stop using
Channel assignment notification transmission means for transmitting a channel assignment notification message including information on the assigned channel to the wireless communication device based on a selection result by the channel selection means;
A management station apparatus comprising: When primary use and secondary use request are set in the channel use classification information of the channel assignment request message, all the primary use channels that can be used by the wireless communication device, or the channel assignment request message Primary availability determination means for performing primary availability determination while allowing rearrangement of usage channels with respect to existing wireless communication devices with respect to included desired channels;
If there is no primary usable channel as a result of the determination by the primary availability determining unit, the rearrangement of the used channels with respect to the existing wireless communication device for all the secondary usage channels that can be used by the wireless communication device And a secondary availability determination unit that performs secondary availability determination, assuming that
The channel assignment notification transmission means includes:
If there is a primary usable channel as a result of the determination by the primary availability determination unit, the most suitable channel is allocated as primary usage, and the channel is allocated according to the primary usage classification. When a secondary usable channel is determined as a result of determination by the secondary availability determination unit, an optimal channel is allocated as secondary usage among the channels, When a channel allocation notification message indicating that a channel is allocated in a secondary usage category is transmitted to the wireless communication apparatus, and as a result of determination by the secondary availability determination unit, there is no secondary usable channel, A channel assignment notification message indicating that channel assignment is impossible is transmitted to the wireless communication device;
The channel change instruction transmission means includes
When the primary availability determination unit or the secondary availability determination unit determines that the use channel rearrangement of the existing wireless communication device is necessary, a channel change instruction message is sent to the corresponding wireless communication device. The management station apparatus according to claim 10, wherein the management station apparatus transmits the management station apparatus. If the channel usage classification information of the channel assignment request message does not set the secondary usage request and the primary usage request is set, all the 1s that can be used by the wireless communication apparatus are set. The system further comprises primary availability judgment means for judging primary availability, while permitting rearrangement of the usage channels with respect to the existing wireless communication apparatus for the next usage channel or the desired channel included in the channel assignment request message. And
The channel assignment notification transmission means includes:
If there is a primary usable channel as a result of the determination by the primary availability determination unit, the most suitable channel is allocated as primary usage, and the channel is allocated according to the primary usage classification. A channel assignment notification message is transmitted to the wireless communication device, and if there is no primary usable channel, a channel assignment notification message indicating that channel assignment is not possible is transmitted to the wireless communication device.
The channel change instruction transmission means includes
The channel change instruction message is transmitted to the corresponding wireless communication device when the primary availability determination unit determines that the use channel rearrangement of the existing wireless communication device is necessary. Item 11. The management station device according to Item 10. If the channel use classification information of the channel assignment request message does not set the primary use request and the secondary use request is set, all the 2 available to the wireless communication apparatus are available. A secondary use availability determination means for performing secondary use availability determination while allowing rearrangement of the use channel to the existing wireless communication device with respect to the next use channel;
The channel assignment notification transmission means includes:
As a result of the determination by the secondary availability determination means, if there is a secondary usable channel, the most suitable channel is allocated as secondary usage, and the channel is allocated according to the secondary usage classification. A channel assignment notification message is transmitted to the wireless communication device, and if there is no secondary usable channel, a channel assignment notification message indicating that channel assignment is not possible is transmitted to the wireless communication device.
The channel change instruction transmission means includes
The channel change instruction message is transmitted to the corresponding wireless communication device when the secondary availability determination unit determines that the use channel rearrangement of the existing wireless communication device is necessary. Item 11. The management station device according to Item 10. A channel usage category is set that has a difference in priority between primary usage, which is a usage category that can be used preferentially, and secondary usage, which is a usage category that can be borrowed when not used elsewhere. A wireless communication device that communicates using a channel in a certain frequency band, can change a channel to be used, and performs wireless communication using a channel assigned by a management station device,
A channel request for transmitting to the management station device a channel assignment request message including at least one of channel use category information indicating a channel use category desired by the own device and desired channel information indicating a channel number desired by the own device. A transmission means;
Channel utilization start means for receiving a channel assignment notification message including information on the assigned channel from the management station apparatus and starting wireless communication by the assigned channel;
When a channel is used in the secondary use channel use section, a channel change instruction message is received from the management station apparatus for instructing to change the used channel or stop using the channel, and the channel change instruction message And a channel changing means for changing a use channel to a channel designated by or stopping the use.

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