JP5582041B2 - Communication coexistence system between wireless communication networks - Google Patents

Description

  The present invention relates to a communication coexistence system and method between wireless communication networks suitable for coexistence of a plurality of communication systems in the same band.

  Conventionally, standardization of a wireless communication network using TV White Space (TVWS) has been promoted, and in particular, in recent years, standardization of a method for coexisting different IEEE802 standards in TVWS (IEEE802.19 standard) has also been promoted. . For this reason, it is particularly important how these different IEEE 802 standard communication systems coexist in the same frequency band, and the importance of the communication system is increasing with the recent dramatic increase in wireless communication opportunities.

  For example, as shown in FIG. 20, in the case where two or more different wireless communication systems 7 and 8 coexist, first, in the wireless communication system 7, a coordinator 71 serving as a base station and a portable device capable of wireless communication with the coordinator 71 The wireless communication system 8 includes a coordinator 81 that serves as a base station and devices 82a to 82c that include mobile terminals that can wirelessly communicate with the device.

  At this time, the interference range indicated by the shaded area where the communicable ranges from the coordinators 71 and 81 overlap is an area where the radio signal can reach from either of the coordinators 71 and 81. In particular, when both the radio communication systems 7 and 8 use the same frequency channel, the device 82a in such an interference range actually performs other radio communication with the coordinator 81 when it performs other radio communication. The communication system 7 is subject to interference.

  For this reason, when operating two or more different wireless communication systems in the same frequency band, it is necessary to establish a coexistence method that can coexist in the same space without interfering with each other. Conventionally, as shown in Patent Document 1, for example, a coexistence technique has been proposed that enables mutual coexistence without the influence of mutual interference caused by mutual wireless communication networks (see, for example, Patent Document 1).

US 2010/0008297

  However, the technology disclosed in Patent Document 1 described above merely describes coexistence processing based on a beacon protocol or the like in an IEEE 802.22 wireless communication system. For this reason, in the IEEE802.19.1 system only, coexistence processing for high-precision interference prevention is actually performed using coexistence control means (Coexistence Manager: CM) and CDIS (Coexistence Discovery and Information Server) described later. The current method has not been proposed yet.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is when the control by the coexistence control means (CM) or CDIS is performed in the IEEE 802.19.1 system. Another object of the present invention is to propose a coexistence system between radio communication networks capable of finding other adjacent radio communication systems without omission and performing coexistence processing for preventing interference with high accuracy.

  A communication coexistence system between wireless communication networks according to the present invention is a communication coexistence system between wireless communication networks that performs wireless communication between one or more devices and a coordinator in order to solve the above-described problem. Or a coexistence control means for controlling each coexistence process by a plurality of wireless communication networks, and a storage means for storing each piece of information transmitted from the plurality of coexistence control means, wherein the coordinator in each wireless communication network is a matrix Create a communicable map that describes an identifier indicating whether or not wireless communication is possible with the above device in each rectangular area corresponding to the actual communication position and arranged vertically and horizontally. The data is transmitted to the storage means via the coexistence control means, and the storage means The communicable map transmitted from the coordinator in the network is stored, and the identifiers described in the respective rectangular areas corresponding to the same communication position are compared for each communicable map between adjacent wireless communication networks. Thus, when it is determined whether or not communication interference occurs between adjacent wireless communication networks, and when it is determined that communication interference occurs, another adjacent wireless network is connected to the adjacent wireless communication network. Neighboring communication information describing information about the communication network is transmitted via the coexistence control means, and each adjacent wireless communication network executes various coexistence processes for coexisting with each other based on the received neighboring communication information. It is characterized by that.

  A communication coexistence method between wireless communication networks according to the present invention is a communication coexistence method between wireless communication networks in which wireless communication is performed between one or more devices and a coordinator. Using coexistence control means for controlling processing and storage means for storing information transmitted from a plurality of the coexistence control means, the coordinator in each wireless communication network is arranged vertically and horizontally in a matrix. In each square area corresponding to the actual communication position, a communication enable map describing an identifier indicating whether or not wireless communication is possible with the device is created, and this is transmitted through the coexistence control means. To the storage means, and by the storage means, the coordinator in each wireless communication network. By storing identifiers described in each rectangular area corresponding to the same communication position for each communicable map between wireless communication networks adjacent to each other. In the case where it is determined whether or not communication interference occurs between the wireless communication networks, and when it is determined that the communication interference occurs, each adjacent wireless communication network is related to another adjacent wireless communication network. The adjacent communication information describing the information is transmitted through the coexistence control means, and various coexistence processes are performed by the adjacent wireless communication networks to coexist with each other based on the received adjacent communication information. And

  According to the present invention having the above-described configuration, even when coexistence control means (CM) or CDIS control is performed in an IEEE 802.19.1 system, other adjacent wireless communication systems can be found without omission and highly accurate. Coexistence processing for preventing interference can be performed.

It is a block diagram of the communication coexistence system between the radio | wireless communication networks to which this invention is applied. It is the figure which showed the radio | wireless communication network and CE memorize | stored in CDIS hierarchically. It is a schematic diagram of a hierarchical structure under one CDIS in a coexistence system between wireless communication networks to which the present invention is applied. It is a figure which shows the model figure of the coexistence system in IEEE802.19.1. It is a figure which shows the structure of the protocol stack at the time of performing the various communications for coexistence between this CE and CM via this COEX_TR_SAP. It is a figure for demonstrating the concept of the coexistence processing operation | movement in the communication coexistence system between the radio | wireless communication networks to which this invention is applied. It is another figure for demonstrating the concept of the coexistence processing operation | movement in the communication coexistence system between the radio | wireless communication networks to which this invention is applied. It is a figure for demonstrating the example of adjacent communication information. It is a 1st flowchart for demonstrating the processing flow of CE. It is a 2nd flowchart for demonstrating the processing flow of CE. It is a 3rd flowchart for demonstrating the processing flow of CE. It is a 1st flowchart for demonstrating the processing flow of CM. It is a 2nd flowchart for demonstrating the processing flow of CM. It is a 3rd flowchart for demonstrating the processing flow of CM. It is a flowchart for demonstrating the detail of the processing flow at the time of transfering to H, S, and I. It is a flowchart for demonstrating the detail of the processing flow at the time of transfering to J, K, and F. It is a flowchart for demonstrating the detail of the processing flow at the time of transfering to M and N. It is a flowchart for demonstrating the detail of the processing flow at the time of transfering to O, Q, and R. It is a flowchart which shows the operation | movement flow of CDIS. It is a figure for demonstrating the problem of a prior art.

  Hereinafter, embodiments of the present invention will be described in detail.

  A communication coexistence system between wireless communication networks to which the present invention is applied is a system in which the IEEE 802.19.1 standard is implemented and coexistence processing can be performed even when TV White Space (TVWS) exists. However, the communication system to which the present invention is applied is not limited to this, and may be applied in coexistence processing between any other systems in a space other than TVWS.

  As shown in FIG. 1, a communication coexistence system 1 between wireless communication networks to which the present invention is applied has a plurality of CMs capable of transmitting and receiving information between one CDIS (Coexistence Discovery and Information Server) 2 and the CDIS. (Coexistence Manager) 3 and CE 4 (Coexistence Enabler) capable of transmitting / receiving information to / from each CM 3 are provided. In FIG. 1, two CMs 3a and 3b capable of transmitting and receiving information to and from CDIS, and two CEs 4a-1 and 4a-2 that are in the jurisdiction of this CM 3a and that can transmit and receive information only with this CM 3a, The description will be made by taking as an example a case where it is in the jurisdiction of the CM 3b and includes only the CM 3b and one CE 4b capable of transmitting and receiving information. However, the present invention is not limited to this. Further, the CDIS 2 is not limited to the case where only one CDIS 2 is provided, and may be provided in a plurality. If a plurality of CDISs 2 are provided, they must be synchronized with each other.

  The communication coexistence system 1 between the wireless communication networks can transmit and receive information to and from the TVWS database 5 outside. Specifically, CDIS 2 or CM 3 can transmit / receive information to / from this database 5.

  The communication coexistence system 1 between the wireless communication networks to which the present invention is applied is a coexistence process that allows the wireless communication networks 6 outside the system to coexist with each other in adjacent spaces without causing communication interference. Will continue. The CE 4 is mounted on the wireless communication network 6 as the coexistence process target. The wireless communication network 6 includes a coordinator 61 that serves as a base station of the network, and a plurality of devices 62 that can perform wireless communication with the coordinator 61.

  One CE is provided in the coordinator 61 of one assigned radio communication network 6. For example, the CE 4a-1 is mounted in the coordinator 61a-1 in the assigned wireless communication network 6a-1. The CE 4a-2 is mounted in the coordinator 61a-2 in the assigned wireless communication network 6a-2. The CE 4b is mounted in the coordinator 61b in the assigned wireless communication network 6b.

  Hereinafter, each component of the communication coexistence system 1 between wireless communication networks to which the present invention is applied will be described in detail.

  CDIS 2 is a server that describes various types of information related to coexistence processing at least between wireless communication networks 6 and provides various useful information stored in itself when CM 3 actually controls coexistence processing. In addition, this CDIS accesses the TVWS database 5, acquires usable information necessary for coexistence with the primary user in the TVWS, and accumulates it. In addition, the CDIS 2 stores information on the radio communication network 6 and the CE 4 that are in charge of each CM 3.

  FIG. 2 shows the wireless communication network 6 and CE 4 stored in the CDIS 2 in a hierarchical manner. Information to be stored is collectively sent to the CDIS 2 by the CM 3. For this reason, CDIS2 stores information in units of CM3. First, information regarding CM3 is stored in a table at the highest level, which is stored so as to be equivalent to the table of effective channels. In addition, information regarding CE4 under the control of CM3 is stored in a table, and further, information regarding the wireless communication network 6 is stored in a table.

  The CM 3 makes a decision regarding coexistence processing as necessary. The CM 3 generates each request command or response command related to the coexistence process, and transmits it to the CDIS 2 or the CE 4. In addition, the CM 3 receives each request command or response command transmitted from the CDIS 2 or the CE 4 and makes various decisions regarding coexistence or executes a processing operation. In addition, when the CE 4 itself does not make a decision regarding coexistence, the CM 3 may perform the decision making instead of the CE 4. In addition, CM3 also performs the coexistence control by itself or assists this even when coexistence processing with TVWS is performed. Incidentally, this CM3 is assigned the jurisdiction of each CE4. The CM 3 may be mounted on the coordinator 61 or may be provided individually on the Internet.

  FIG. 3 schematically shows a hierarchical structure in a communication coexistence system 1 between wireless communication networks to which the present invention is applied. According to FIG. 3, for example, CE4a-1, CE4a-2, and CE4a-3 are assigned as the jurisdiction of the CM 3a. As the jurisdiction of CM3b, CE4b-1, CE4b-2, CE4b-3, and CE4b-4 are assigned. Further, CE4c-1, CE4c-2, and CE4c-3 are assigned as the jurisdiction of CM3c. For example, the CM 3a has various communication information such as which channel each of the CE4a-1, CE4a-2, and CE4a-3 in its jurisdiction uses, what is its communication range, and which communication standard is used. Basically try to grasp all. The grasped communication information is stored in a storage unit (not shown) in the CM 3. Further, when communication information related to CE 4 within its own jurisdiction is updated, it may be updated as needed. Note that the communication information about CE4b-1 to CE4b-4 under the jurisdiction of the other CM3b and the like is in an unknown state at the initial stage.

  Incidentally, the communication information here includes all information related to communication such as CM3 ID, network ID, service area, network standard and communication method, and various decision making methods in addition to channel information.

  The CE 4 is an enabler that relays communication between the coordinator 61 and the device 62 in the wireless communication network 6 and between the CMs 3 and executes various processes relating to coexistence. This CE 4 is actually mounted in the coordinator 61 in the wireless communication network 6, and transmits various requests and responses regarding coexistence generated by the coordinator 61 or received from the device 62 to the CM 3. The CE 4 sends various requests and responses regarding coexistence transmitted from the CM 3 to the coordinator 61 and the device 62. The CE 4 mainly plays a role as an enabler, and performs processing for replacing a signal to be transmitted / received with another standard as necessary, or converting a signal to be transmitted / received into another signal. That is, the dotted arrows between the CE 4 and the coordinator 61 in FIG. This CE4 is divided into jurisdiction groups under CM3, and one CE4 does not belong to two or more CM3 jurisdiction groups.

  Since the CE 4 is mounted on the wireless communication network 6, it can be said that the determination of the CE 4 represents the determination of the wireless communication network 6 (including the coordinator 61 and the device 62) itself.

  The TVWS database 5 is a database that stores a list of channels already occupied by the primary user. The TVWS database 5 also stores a list of channels that are not already occupied.

  The device 62 can perform wireless packet communication with the coordinator 61 based on the IEEE 802 standard, and further can perform wireless packet communication with another device 62 via the coordinator 61. The device 62 is, for example, a mobile terminal such as a mobile phone or a personal computer (PC).

  Similarly, the coordinator 61 may have the same configuration as the device 62 described above. The coordinator 61 serves as a central control unit in the wireless communication network 6. The coordinator 61 may be provided with a mounting portion (not shown) to which the CE 4 can be mounted.

  Incidentally, a communication control station for controlling communication in the wireless communication network 6 may be separately provided in the wireless communication network 6.

  FIG. 4 shows a model diagram of a coexistence system in IEEE802.19.1. These entire coexistence systems are defined in the application layer. Each IEEE 802.19.1 system has the following service access point (SAP).

  The coexistence SAP (COEX_SAP) is an SAP between any one of CDIS2, CM3, and CE4 and the wireless communication network 6 or the device 62, and is used in, for example, an IEEE802.11 or IEEE802.22 system.

  The coexistence transfer SAP (COEX_TR_SAP) is an SAP between one of CDIS2, CM3, and CE4 and the TVWS database 5. Incidentally, communication with the TVWS database 5 is executed through a service provider.

  FIG. 5 shows a configuration of a protocol stack when various communications for coexistence are performed between the CE 4 and the CM 3 via the COEX_TR_SAP. CE4 and CM3 execute coexisting applications via the physical link layer, TCP layer, and IP layer.

  Next, the concept of the coexistence processing operation in the communication coexistence system 1 between wireless communication networks to which the present invention is applied will be described.

  6A shows a range in which the coordinator 61 can communicate with the device 62 in a certain wireless communication network 6. That is, it can be separated into a communicable range and non-communicable non-hatched region in a domain region indicated by a square shape. This domain area is the maximum range in which the coordinator 61 can perform wireless communication. The incommunicable range means a range in which communication with the coordinator 61 cannot be performed when the device 62 is located in the range due to, for example, the influence of a mountainous area or a building. The communicable range and the incapable range can be determined in advance on the coordinator 61 side based on the reception status of radio waves from the device 62 side, the received signal strength, and the like.

  In the present invention, such a communicable range is dropped into a communicable map 50 made up of quadrangular regions 51 arranged vertically and horizontally in a matrix as shown in FIG. 6B. This square area 51 corresponds to the actual communication position. The rectangular area 51 corresponds to 100 m in length and width of the actual communication position, but is not limited to this length. The rectangular area 51 is assigned a parameter such as an identifier described later. The following is an example of the definition of the rectangular area 51.

  The rectangular area includes pixel ID, latitude, longitude, frequency lower limit, frequency upper limit, antenna polarity (horizontal, vertical, circular, etc.), antenna azimuth angle upper and lower limits, antenna elevation angle upper and lower limits, and reception sensitivity. Such data may be described.

  In the rectangular area 51, an identifier indicating whether or not the coordinator 61 can perform wireless communication with the device 62 is described. This identifier may be any identifier. For example, as shown in FIG. 6B, when the ratio of the communicable range in the unit square area 51 exceeds 50%, “1” is set. When the proportion of the communicable range in the unit square area 51 is 50% or less, “0” may be described. As a result, the communicable range can be displayed on the communicable map 50 represented by a binary value composed of “1” and “0”. Further, in binarization, the threshold value is not limited to 50%, and any threshold value may be used as long as the threshold value is exceeded. The communicable map 50 is not limited to the binary display as described above. The communicable map 50 is displayed in three or more stages according to the occupation ratio of the communicable range in the unit square area 51. Also good.

  Next, the coordinator 61 of each wireless communication network 6 transmits the created communicable map 50 to the CDIS 2 via the CM 3 having jurisdiction over the map. The CDIS 2 is grouped for each CM 3 having jurisdiction over the communicable map 50 and stored for each wireless communication network 6.

  Next, the CDIS 2 determines whether or not there is a possibility of communication interference between the wireless communication networks 6 by comparing the stored communicable maps 50. FIG. 7 is an example of determining whether or not communication interference has occurred between the communicable map 50a and the communicable map 50b. First, the rectangular areas 51 corresponding to the same communication position are compared with each other. In FIG. 7, each rectangular area 51 corresponding to the same communication position is displayed overlapping between the communicable map 50 a and the communicable map 50 b.

  Incidentally, the determination is performed by comparing the identifiers described in the respective rectangular areas 51. In the communicable map 50a and the communicable map 50b, when both square areas 51 corresponding to the same communication position are described as “1”, it is determined that communication interference occurs. On the other hand, in the communicable map 50a and the communicable map 50b, if any one of the square areas 51 corresponding to the same communication position is “0”, it is determined that no communication interference occurs. Incidentally, when it is determined in one or more quadrilateral areas 51 that this communication interference will occur, it is determined that communication interference will occur between the two wireless communication networks 6 that have generated the communicable maps 50a, 50b. It becomes.

  At this time, even when identifiers are displayed in three or more stages according to the occupancy rate of the communicable range in the unit quadrangular area 51, similarly, if the ones having a high occupancy rate of the communicable range overlap, You may make it discriminate | determine that interference arises.

  Next, when it is determined that communication interference occurs as a result of the determination described above, adjacent communication information describing information related to another adjacent wireless communication network 6 with respect to the adjacent non-communication communication network 6 Is transmitted via CM3.

  This adjacent communication information may include a network ID of an adjacent wireless communication network, a communication standard to be adopted, and channel information.

  The network ID is an ID given by the FCC (Federal Communications Commission), the BCC (The Broadcasting Corporation of China), etc. in IEEE802.11, which is assigned to identify the identity of the network.

  The communication standard allows communication even under the TVWS operating environment, such as IEEE802.11, IEEE802.22, IEEE802.15.4gTVWS.

  The channel information is a channel currently used by the wireless communication network 6. In the coexistence system, the radio communication network 6 using the channel is usually controlled so as not to receive any strong interference.

  The wireless communication network 6 that has received such adjacent communication information performs various adjustments such as changing channels in order to prevent communication interference with each other.

  As shown in FIG. 8, when there are three wireless communication networks 6a to 6c, the wireless communication network 6a has a network ID "101", a communication standard is IEEE 802.11, and the wireless communication network 6b is a network. It is assumed that the ID is “102”, the communication standard is IEEE 802.11, and the wireless communication network 6c is the network ID “103” and the communication standard is IEEE 802.22. Such information may be transmitted to CDIS 2 in advance, or may be transmitted to CDIS 2 at the same time as the above-described communication possible map transmission.

  It is assumed that adjacent communication information has been transmitted to each of them as a result of determining that CDIS2 causes communication interference with each other. Also, assuming that only channels 1 and 2 exist, the wireless communication network 6a uses the channel 1, the wireless communication network 6b uses the channel 2, and the wireless communication network 6c uses the channel 2.

  Table 1 shows an example of adjacent communication information transmitted from CDIS2.

  The adjacent communication information is information related to adjacent wireless communication networks. For this reason, the wireless communication network 6a includes adjacent communication information related to the wireless communication network 6b, the wireless communication network 6b includes adjacent communication information related to the wireless communication networks 6a and 6c, and the wireless communication network 6c includes the wireless communication network 6b. Will be transmitted.

  For example, the wireless communication network 6a can determine that the wireless communication network 6b adopts the same communication standard as that of itself by acquiring adjacent communication information, and can communicate on a channel 2 different from itself. Can be determined. For this reason, the wireless communication network 6 can know that it is desirable to keep using the channel 1 currently used as it is in terms of preventing communication interference. Further, it can be known that the radio communication network 6c is preferably switched to the channel 1 in order to prevent communication interference with the radio communication network 6b.

  Each wireless communication network 6 performs control such as channel switching from the viewpoint of preventing communication interference with another adjacent wireless communication network 6.

  Next, a flow of a communication coexistence method between wireless communication networks will be described.

  FIG. 9-11 shows the processing flow of CE4. First, as shown in step S11 of FIG. 9, the CE 4 itself confirms the connection status to the wireless communication network 6 or the coordinator 61 and the device 62 constituting the same. Next, the process proceeds to step S12, and it is confirmed whether or not the connection is valid. If the connection is invalid, the process proceeds to step S11 again. If the connection is valid, the process proceeds to step S13.

  When the process proceeds to step S13, various pieces of information necessary for coexistence are acquired from the wireless communication network 6 (hereinafter referred to as a concept including the coordinator 61 and the device 62 constituting the same). The information necessary for the coexistence includes all information related to communication such as the above-described channel information, ID and network ID assigned to the wireless communication network, service area, network standard and communication method, and the like.

  Next, the process proceeds to step S14 to determine whether or not the acquired information is valid. If the acquired information is valid, the process proceeds to A. If the acquired information is not valid, the process proceeds to step S15.

  In step S15, the wireless communication network 6 is requested for information necessary for coexistence, and then the process returns to step S11 again.

  When the process moves to A, the process moves to step S16 as it is, and the connection to CM3 is confirmed. If it is determined in step S17 that the connection is valid, the process proceeds to B. On the other hand, if it is determined in step S17 that the connection is not valid, the process proceeds to step S18.

  When the process proceeds to step S18, the wireless communication network 6 is notified that the CM 3 is not operating, and then the process returns to A again, and the processes of steps S16 and S17 are repeatedly executed.

  FIG. 10 shows a flow in the case of shifting to B. First, the process proceeds to step S19, where authentication information is acquired from the wireless communication network 6. Next, the process proceeds to step S20, and CE4 authentication is executed. If the authentication is successful in step S21, the process proceeds to step S23. On the other hand, if the authentication fails in step S21, the process proceeds to step S22. In step S22, the wireless communication network 6 is notified that the authentication has failed, and the process returns to step S19 again.

  When the process proceeds to step S23, registration information is acquired from the wireless communication network 6. This registration information is information such as the network ID, communication standard, and channel of each wireless communication network 6 when the CDIS 2 creates adjacent communication information. Next, the process proceeds to step S24, registration of CE4 is executed, and then the process proceeds to C.

  FIG. 11 shows a flow in the case of shifting to C. In step S25, first, adjacent detection is performed. This adjacency detection is a determination of whether or not there is a possibility of communication interference between the wireless communication networks 6 by the above-described CDIS2. After this adjacency detection is completed, the process proceeds to step S26. In step S26, the adjacent communication information sent from the CDIS 2 side is transferred to the wireless communication network 6. After completing this transfer process, the process proceeds to step S27 via D.

  In step S27, the message input in CE4 is checked. This input message includes a message from the wireless communication network 6 (including the coordinator 61 and the device 62) and a message from the CM 3. If no new message has been input in step S28, the process returns to D again, and steps S27 and S28 are repeatedly executed. On the other hand, when a new message is received, the process proceeds to step S29.

  In step S29, the details of the new message are confirmed. If the new message is new registration information, go to step S30, if it is new neighboring communication information, go to step S31. If it is a notification that CM3 is powered off, go to step S32. In step S33, if a new effective channel list is requested, the process proceeds to step S34. If another message is received from the CM 3, the process proceeds to step S36.

  When the process proceeds to step S30, the registration information is updated. When the process proceeds to step S31, adjacent communication information is provided to the wireless communication network 6. If the process proceeds to step S32, registration cancellation is executed for the CM3. When the process proceeds to step S33, session active confirmation is performed. When the process proceeds to step S34, registration cancellation and authentication cancellation are first performed, and then the process proceeds to step S35 to notify the wireless communication network 6 and the like that the CM 3 does not operate. When the process proceeds to step S36, the CM 3 is notified that the message is not supported. After completing each process of steps S30 to S36 (excluding step S34), the process returns to D again.

  FIG. 12-18 shows the processing flow in CM3. After starting, the process proceeds to step S41 via E. In this step S41, connection to CDIS2 is attempted. Actually, one CDIS2 is selected based on the candidate list of CDIS2 that can be connected to CM3, and connection to it is attempted.

  Next, the process proceeds to step S42, and it is identified whether or not the connection between CM3 and CDIS2 is successful. If the connection is successful, the process proceeds to step S44. If the connection is unsuccessful, the process proceeds to step S43.

  When the process proceeds to step S43, it is determined whether or not it is the end of the CDIS2 candidate list. If it is not the end of the CDIS2 candidate list, the process returns to step S41 to try to connect to the next CDIS2. If the CDIS2 candidate list is at the end, the connectable CDIS2 no longer remains, and the subsequent flow is stopped.

  When the process proceeds to step S44, authentication on the CD3 side of CM3 is executed. Next, the process proceeds to step S45. If the authentication in step S44 is performed, the process passes through F and the process proceeds to step S46. If the authentication is not performed, the process returns to E again.

  When the process proceeds to step S46, it is determined whether or not a message has been received. If the message can be received, the process proceeds to step S47. If the message cannot be received, the process returns to F, and the process of step S46 is repeated.

  If the process proceeds to step S47, it is determined whether or not the message is from the CE4. If it is a message from CE4, the process proceeds to step S48. On the other hand, if it is not a message from CE4, the process proceeds to G. When the process proceeds to step S48, a timer is set for CE4 and the session active is checked, and then the process proceeds to G.

  Note that F described above may be continued from the flowchart shown in FIG. In FIG. 13, the process starts from Z. First, in step S49, a valid channel is acquired from CDIS2 or from database 5. Next, the process proceeds to step S50, and a valid channel list is notified to the wireless communication network 6. Next, the process proceeds to step S51, and adjacent detection by CM3 is performed. Next, the process proceeds to step S52, the adjacent communication information obtained as a result of the adjacent detection is notified to the wireless communication network 6, and the process proceeds to F.

  When the process proceeds to G in FIG. 12, as shown in FIG. 14, it is first identified whether the message relates to an event, a request, or a timer.

  If the message is related to an event and related to power off, the process moves to H. Also, if the message is related to a request, if it is an authentication request, I will be related to the confirmation of session active. If it is related to the notification of neighboring communication information, it is related to N, if it is related to the notification of the channel list, O if it is related to the notification of the channel list, P if it is a response of the used channel, If it is another message, the process moves to R. If the message relates to a timer and is a session active request, the process proceeds to S.

  Hereinafter, the detailed flow of H to S will be described.

  When the process shifts to H, as shown in FIG. 15A, in step S53, a registration cancellation notification is made. In step S54, CM3 registration cancellation and authentication cancellation processing are performed, and the process ends.

  When the process shifts to S, as shown in FIG. 15B, the session active check of CE4 is performed in step S55.

  When the process shifts to I, as shown in FIG. 15C, CE4 is authenticated in step S56.

  When the process shifts to J, as shown in FIG. 16A, the operation code is confirmed in step S57. This operation code indicates either new registration or updated registration information. If the operation code is new registration, the process proceeds to step S58 to register CE4, and then proceeds to step S59 to register CM3. On the other hand, when the operation code is update, the process proceeds to step S60 to perform CE4 registration update, and further proceeds to step S61 to perform CM3 registration update. After completing these processes, the process proceeds to Z in FIG.

  When the process shifts to K, as shown in FIG. 16B, the CE4 is deregistered as shown in step S62. Next, as shown in step S63, it is determined whether or not the registration of the last CE4 has been canceled. If the last CE4 is deregistered, the process proceeds to step S64. On the other hand, if deregistration of the last CE4 has not been completed, the process proceeds to step S65.

  When the process proceeds to step S64, the registration of CM3 is canceled. When the process proceeds to step S65, registration update of CM3 is performed. After completing steps 64 and 65, the process proceeds to F.

  When the process shifts to L, as shown in FIG. 16 (c), CE4 is deauthenticated in step S66.

  When the process shifts to M, as shown in FIG. 17A, when the process shifts to step S67, the session active timer of CE4 is reset.

  When the process shifts to N, as shown in FIG. 17B, the process shifts to step S68 to update the adjacent communication information, and further shifts to step S69 to transmit the adjacent communication information to CE4.

  When the process shifts to O, as shown in FIG. 18A, the effective channel list is updated in step S70. In step S71, the effective channel list to CE4 is transmitted. At this time, the information service may be included together.

  When the process shifts to P, a response regarding an available channel is transmitted, although explanation by the flowchart is omitted.

  In the case of shifting to Q, as shown in FIG. 18B, in step S72, confirmation of session active to CDIS2 is transmitted.

  When the process shifts to R, as shown in FIG. 18C, an error message indicating that the received message is not supported is transmitted in step S73.

  In addition, in these detailed flows of H to S, after executing all the flows except J, the process moves to F.

  FIG. 19 shows an operation flow of CDIS2. First, in step S81, connection to the database 5 is first performed. Next, T is passed, and in step S82, it is identified whether or not a new message or timer expiration has been received. As a result, if received, the process proceeds to step S83, and if not received, the process proceeds to T.

  When the process proceeds to step S83, it is identified whether the newly received information is a message or a timer. If the received message is a connection request, a connection response as shown in step S84 is performed after the connection process is actually performed. If the received message is an authentication request, CM3 authentication processing is actually performed as shown in step S85. If the received message is a registration request, CM3 registration processing is performed as shown in step S86, and the registered contents are reflected in the adjacent communication information as shown in step S87. If the received message is a deregistration request, CM3 deregistration processing is performed as shown in step S88. If the received message is a request for deauthentication, CM3 deauthentication processing is performed as shown in step S89. If the received message is another message, an error message indicating that the message is not supported is notified as shown in step S90.

  If the received information is a timer, and if it is CM3 session activation, the process proceeds to step S91 to check CM3 session activation.

  Note that after executing the processing of steps S84 to S85 and S87 to S91, the process proceeds to T again.

  Table 2 shows a message sent from CE4 to CM3 to log in to CM3. This message is also sent from CM3 to CDIS2 to log in to CDIS2.

  Table 3 shows messages sent from CM 3 to CE 4 to accept or reject CE 4 authentication. This message is sent from CDIS 2 to CM 3 to accept or reject CM 3 authentication.

  Table 4 shows messages sent from CE4 to CM3 to log off from CM3. This message is sent from CM3 to CDIS2 to log off from CDIS2.

  Table 5 is a message sent from CM 3 to CE 4 to accept or reject CE 4 deauthorization. This message is a message sent from CDIS 2 to CM 3 in order to accept or reject the de-authentication of CM 3.

  Table 6 shows a message transmitted from the CE 4 to the CM 3 in order to register information on the wireless communication network 6 or the device 62. This message is used for initial registration or registration update.

  Table 7 is a message provided by CMIS from CD3 and sent from CM3 to CDIS2 in order to register information of wireless communication network 6 or device 62. This message is used for initial registration or registration update.

  Table 8 shows a message transmitted from CM 3 to CE 4 for confirmation of registration. This message is transmitted from CDIS2 to CM3 for confirmation of registration.

  Table 9 shows messages sent from CM 3 to CE 4 for notification of deregistration to CE 4. This message is not described in the payload.

  Table 10 is a message sent from CE4 to CM3 to remove the registration record from CM3. This message is also sent from CM 3 to CDIS 2 to remove the registration record from CDIS 2.

  Table 11 shows a message transmitted from CM 3 to CE 4 for confirmation of deregistration. This message is also transmitted from CDIS 2 to CM 3 for confirmation of deregistration.

  Table 12 shows messages sent from CM 3 to CDIS 2 to check the validity of CDIS 2. This message is not described in the payload.

  Table 13 is a message sent from CDIS2 to CM3 to confirm the validity of CDIS2 in order to provide a service for CM3.

  Table 14 is a message transmitted from CM 3 to CE 4 in order to provide neighboring communication information to CE 4.

  Table 15 shows messages sent from CDIS2 to CM3. This message is for requesting the CM 3 for the CDIS 2 and for providing adjacent communication information regarding the wireless communication network 6 and the device 62.

  Table 16 is a message sent from CM 3 to CE 4 to request a list of valid channels from CE 4. This message is also used to request a list of valid channels from CM 3 to CDIS 2 or database 5. This message is not described in the payload.

  Table 17 is a message for providing an effective channel list from CE4 to CM3 to CM. This message is also transmitted from the CDIS 2 or the database 5 to the CM 3 and is used for the CDIS 2 or the database 5 to provide an effective channel list to the CM 3.

Table 18 is transmitted to provide a channel list from CM3 / CDIS2 to CE4 / CM3 and to CE4 / CM3.

1 Coexistence system between wireless communication networks 2 CDIS
3 CM
4 CE
5 Database 6 Wireless communication network 61 Coordinator 62 Device

Claims (6)

In a communication coexistence system between wireless communication networks that perform wireless communication between one or more devices and a coordinator,
A coexistence control means for controlling each coexistence process by one or a plurality of wireless communication networks within the jurisdiction, and a storage means for storing each piece of information transmitted from the plurality of coexistence control means,
The coordinator in each of the wireless communication networks describes an identifier indicating whether wireless communication is possible with the device in each rectangular area that is arranged vertically and horizontally in a matrix and corresponds to an actual communication position. Each communicable map is created and transmitted to the storage means via the coexistence control means,
The storage means stores the communicable map respectively transmitted from the coordinator in each wireless communication network, and each quadrangle corresponding to the same communication position for each communicable map between adjacent wireless communication networks. By comparing the identifiers described in the areas, it is determined whether or not communication interference occurs between adjacent wireless communication networks, and when it is determined that communication interference occurs, one adjacent non-communication communication network In contrast, adjacent communication information describing information about other adjacent wireless communication networks is transmitted via the coexistence control means,
A communication coexistence system between wireless communication networks, wherein each adjacent wireless communication network executes various coexistence processes for communication coexistence with each other based on the received adjacent communication information. 2. The communication coexistence system between wireless communication networks according to claim 1, wherein the coordinator describes the identifier that is made into a plurality of levels depending on whether or not a wireless communicable range exceeds a threshold value in the rectangular area. The communication coexistence system between wireless communication networks according to claim 1, wherein the storage means includes a network ID of a wireless communication network, a communication standard to be adopted, and channel information as the adjacent communication information. In a communication coexistence method between wireless communication networks that perform wireless communication between one or more devices and a coordinator,
Using coexistence control means for controlling each coexistence process by one or more wireless communication networks within jurisdiction, and storage means for storing each piece of information transmitted from the plurality of coexistence control means,
By the coordinator in each wireless communication network, an identifier indicating whether or not wireless communication is possible with the device is described in each rectangular area that is arranged vertically and horizontally in a matrix and corresponding to the actual communication position. Each communicable map is created and transmitted to the storage means via the coexistence control means,
The storage means stores the communicable map respectively transmitted from the coordinator in each wireless communication network, and each quadrangle corresponding to the same communication position for each communicable map between adjacent wireless communication networks. By comparing the identifiers described in the areas, it is determined whether or not communication interference occurs between adjacent wireless communication networks, and when it is determined that communication interference occurs, one adjacent non-communication communication network For each, send adjacent communication information describing information about other adjacent wireless communication networks via the coexistence control means,
A communication coexistence method between wireless communication networks, characterized in that various coexistence processes for coexisting with each other based on the received adjacent communication information are executed by adjacent wireless communication networks. 5. The communication coexistence method between wireless communication networks according to claim 4, wherein the coordinator describes the identifier that is made into a plurality of levels depending on whether or not a wireless communication possible range exceeds a threshold value in the rectangular area. The communication coexistence method between wireless communication networks according to claim 4 or 5, wherein the storage means includes a network ID of a wireless communication network, a communication standard to be adopted, and channel information as the adjacent communication information.