TWI452915B - Wireless terminal device and wireless communication system - Google Patents
Wireless terminal device and wireless communication system Download PDFInfo
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- TWI452915B TWI452915B TW100144131A TW100144131A TWI452915B TW I452915 B TWI452915 B TW I452915B TW 100144131 A TW100144131 A TW 100144131A TW 100144131 A TW100144131 A TW 100144131A TW I452915 B TWI452915 B TW I452915B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
- H04W40/06—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on characteristics of available antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Description
本發明係關於一種構成無線網狀網路(mesh network)系統的無線終端機裝置。The present invention relates to a wireless terminal device that constitutes a wireless mesh network system.
就習知的移動型通訊裝置的網路其中之一而言,無法直接通訊的無線終端機裝置彼此係藉由經由中繼裝置(中繼通訊的無線終端機裝置)進行通訊,能夠進行多數個無線終端機裝置彼此的相互通訊的無線網狀網路的技術已被開發。如前述的無線網路一般而言稱為網狀網路,不管基地局或固定局、移動局如何,無線終端機裝置間的資料通訊係在中途藉由中繼複數台無線終端機裝置來進行形成網路。In one of the networks of conventional mobile communication devices, wireless terminal devices that cannot communicate directly can communicate with each other via a relay device (a wireless terminal device that relays communication). A technology of a wireless mesh network in which wireless terminal devices communicate with each other has been developed. The wireless network as described above is generally referred to as a mesh network. Regardless of the base station or the fixed office or the mobile office, the data communication between the wireless terminal devices is performed by relaying a plurality of wireless terminal devices in the middle. Form a network.
在如以上方式所構成的網路系統中,從傳送源的無線終端機裝置所傳送的資料,係藉由根據無線終端機裝置間的通訊品質所構築之中繼路徑上的無線終端機裝置被進行中繼(hop),而傳送至最終目的地的無線終端機裝置。在如前述的網路系統中,供以使通訊可靠性進一步提升的技術記載於專利文獻1。具體而言,記載有無線終端機裝置保有複數個天線(antenna),且作為在與周圍的複數個無線終端機裝置之各個進行通訊所使用的天線,藉由選擇接收時的無線品質最優良的天線來使通訊可靠性提升的技術。In the network system configured as described above, the data transmitted from the wireless terminal device of the transmission source is transmitted by the wireless terminal device on the relay path constructed based on the communication quality between the wireless terminal devices. A hop is transmitted to the wireless terminal device of the final destination. In the network system as described above, a technique for further improving communication reliability is described in Patent Document 1. Specifically, it is described that the wireless terminal device holds a plurality of antennas, and the antenna used for communication with each of the plurality of wireless terminal devices in the vicinity is the most excellent in wireless quality at the time of reception. Antennas to improve communication reliability.
(專利文獻)(Patent Literature)
專利文獻1:日本特開2010-98595號公報。Patent Document 1: Japanese Laid-Open Patent Publication No. 2010-98595.
如前所述,在專利文獻1所述的技術中,係設成從複數個天線之中選擇接收品質最優良的天線來使用。然而,在從傳送源至最終目的地的無線終端機裝置之間,當中繼信號的次數(中繼數)變多時,由於就系統全體而言的通訊可靠性會降低,所以僅考量與鄰接的無線終端機裝置之間的通訊品質來選擇天線的情形,會有無法選擇最佳天線的問題。此外,在閘道器(gateway)或各無線終端機裝置中因係根據無線終端機裝置間的通訊品質構築中繼路徑,所以各無線終端機裝置,係無法預先掌握是從周圍的哪個無線終端機裝置接收資料。因此,在保有複數個天線的無線終端機裝置中,對於特定的無線終端機裝置當在選擇無線品質最優良天線之狀態進行待機時,選擇中的天線也未必是最佳天線(無法以最佳天線進行接收),通訊的可靠性會有降低的問題。As described above, in the technique described in Patent Document 1, an antenna having the best reception quality is selected from among a plurality of antennas. However, when the number of relay signals (the number of relays) increases between the wireless terminal devices from the transmission source to the final destination, since the communication reliability is lowered as a whole of the system, only consideration and adjacency are considered. The quality of the communication between the wireless terminal devices is such that the antenna is selected, and there is a problem that the optimal antenna cannot be selected. Further, in a gateway or a wireless terminal device, since the relay path is constructed based on the communication quality between the wireless terminal devices, it is impossible for each wireless terminal device to know in advance which wireless terminal is from the periphery. The device receives the data. Therefore, in a wireless terminal device that holds a plurality of antennas, when a specific wireless terminal device is in standby while selecting a state in which the wireless quality is the best antenna, the selected antenna is not necessarily the best antenna (it is not optimal) The antenna is received), and the reliability of communication will be reduced.
本發明為有鑑於前述之問題所開發者,係為在無線網狀網路中,選擇並使用所保有複數個天線之中最佳之天線,以獲得提供高可靠性之通訊的無線終端機裝置、及無線通訊系統為目的。The present invention has been developed in view of the foregoing problems, and is to select and use the best antenna among the plurality of antennas in the wireless mesh network to obtain a wireless terminal device that provides high reliability communication. And wireless communication systems for the purpose.
為了解決前述課題,並達成目的,本發明係為一種無線終端機裝置,具備複數個天線,並與閘道器一起形成網狀網路者,在加入網狀網路時,藉由依序使用前述複數個天線與周圍的其他屬於無線終端機裝置的鄰接終端機(terminal)進行通訊,以取得在使用各天線時,分別顯示從各鄰接終端機至前述閘道器為止的中繼數的中繼數資訊,並且量測與各鄰接終端機之間的通訊品質,再根據該中繼數資訊及通訊品質,來決定在網狀網路內之通訊所要使用的天線。In order to solve the above problems and achieve the object, the present invention is a wireless terminal device having a plurality of antennas and forming a mesh network together with the gateway, and when using the mesh network, by using the foregoing The plurality of antennas communicate with other peripheral terminals belonging to the wireless terminal device in the vicinity to obtain relays for displaying the number of relays from the adjacent terminal devices to the gateways when the antennas are used. The information is measured, and the communication quality between each adjacent terminal is measured, and then the antenna to be used for communication in the mesh network is determined according to the relay number information and communication quality.
本發明之無線終端機裝置,與僅考量與周圍的其他無線終端機之間的通訊品質而選擇要使用的天線的情形相比,達成能夠實現更高可靠性的通訊之效果。The wireless terminal device of the present invention achieves an effect of achieving higher reliability communication than the case where only the antenna to be used is selected in consideration of the communication quality with other wireless terminals in the vicinity.
以下,將本發明之無線終端機裝置及無線通訊系統的實施形態根據圖式詳細地進行說明。另外,該發明並不受該實施形態所侷限。Hereinafter, embodiments of the wireless terminal device and the wireless communication system according to the present invention will be described in detail with reference to the drawings. Further, the invention is not limited by the embodiment.
第1圖係為顯示含有本發明之無線終端機裝置(以下,記載為無線終端機)之無線通訊系統的構成例圖。如圖所示,該無線通訊系統,係含有管理伺服器(server)1、閘道器2、及無線終端機5A至5H而構成。另外,在以下,於說明無線終端機5A至5H的共通之事項(裝置構成、功能、動作等)時,彙集無線終端機5A至5H記載為無線終端機5。Fig. 1 is a view showing an example of a configuration of a wireless communication system including a wireless terminal device (hereinafter referred to as a wireless terminal device) according to the present invention. As shown in the figure, the wireless communication system includes a management server 1, a gateway 2, and wireless terminals 5A to 5H. In the following, when the common items (device configuration, function, operation, and the like) of the wireless terminal devices 5A to 5H are described, the aggregation wireless terminals 5A to 5H are described as the wireless terminal device 5.
管理伺服器1與閘道器2係以經由廣域網路網3進行通訊之方式被配置,管理伺服器1及閘道器2,係例如藉由屬於光學電纜(optical cable)之通訊電纜4與廣域網路網3連接。閘道器2及無線終端機5係具備複數個天線,在信號的傳送接收時使用1個天線。此外,在無線終端機5係以有線或者無線的方式連接有計量電力用量等之電力計(meter)6,無線終端機5係將在電力計6的量測資料以經由閘道器2向管理伺服器1進行傳送。此時,無法與閘道器2直接通訊的無線終端機5,係以經由其他無線終端機5至閘道器2為止傳送量測資料。在第1圖的例中,無線終端機5C至5H係位於無法與閘道器2直接通訊之場所,而以經由其他無線終端機5傳送量測資料。The management server 1 and the gateway 2 are configured to communicate via the wide area network 3, and the server 1 and the gateway 2 are managed, for example, by a communication cable 4 and a wide area network belonging to an optical cable. Road network 3 is connected. The gateway 2 and the wireless terminal 5 are provided with a plurality of antennas, and one antenna is used for transmission and reception of signals. Further, the wireless terminal device 5 is connected to a power meter 6 such as a metering power amount by wire or wirelessly, and the wireless terminal device 5 manages the measurement data of the power meter 6 via the gateway 2 The server 1 transmits. At this time, the wireless terminal device 5 that cannot directly communicate with the gateway device 2 transmits the measurement data via the other wireless terminal device 5 to the gateway device 2. In the example of Fig. 1, the wireless terminals 5C to 5H are located in a place where direct communication with the gateway 2 is impossible, and the measurement data is transmitted via the other wireless terminal 5.
針對構成第1圖所示之無線通訊系統之各裝置的詳細進行說明。The details of each device constituting the wireless communication system shown in Fig. 1 will be described.
雖然省略了圖示,但管理伺服器1係具備有:中央控制部、通訊控制部、以及記憶裝置;該中央控制部係控制系統的功能;該通訊控制部,係供以進行經由廣域網路網3與閘道器2及無線終端機裝置4的通訊;而該記憶裝置,係保存經由閘道器2及無線終端機5所取得之電力量等的量測資料。該管理伺服器1,係與無線終端機5進行通訊,且彙集以使用者等所設置的電力計6所量測的量測資料(使用電量等)。Although not shown, the management server 1 includes a central control unit, a communication control unit, and a memory device; the central control unit controls the function of the system; and the communication control unit is provided for transmission via the wide area network. 3, communication with the gateway 2 and the wireless terminal device 4; and the memory device stores measurement data such as the amount of power obtained by the gateway 2 and the wireless terminal 5. The management server 1 communicates with the wireless terminal device 5, and collects measurement data (power consumption, etc.) measured by the power meter 6 provided by the user or the like.
第2圖係為顯示閘道器2的構成例圖。如圖所示,閘道器2係具備有:中央控制部21、無線處理部22、通訊控制部23及光輸出/輸入部24。中央控制部21,係進行與管理伺服器1或者無線終端機5的資料處理。無線處理部22,係進行供以進行無線終端機5與無線網路通訊的無線通訊控制。通訊控制部23,係進行供以進行管理伺服器1與有線網路通訊的有線通訊控制。光輸出/輸入部24,係進行供以經由光學電纜4向廣域網路網3連接的處理(從電信號向光信號的轉換處理、從光信號向電信號的轉換處理)。Fig. 2 is a view showing an example of the configuration of the gateway 2; As shown in the figure, the gateway 2 includes a central control unit 21, a wireless processing unit 22, a communication control unit 23, and a light output/input unit 24. The central control unit 21 performs data processing with the management server 1 or the wireless terminal device 5. The wireless processing unit 22 performs wireless communication control for performing communication between the wireless terminal device 5 and the wireless network. The communication control unit 23 performs wired communication control for managing the communication between the server 1 and the wired network. The light output/input unit 24 performs processing for connecting to the wide area network 3 via the optical cable 4 (conversion processing from an electric signal to an optical signal, and conversion processing from an optical signal to an electric signal).
此外,如第3圖所示,無線處理部22係具備有天線開關(switch)221、無線部222、無線I/F(介面(interface))部223、無線網路控制部244、路由表225(routing table)、以及無線通訊控制部226;該天線開關221,係用以切換複數個天線220;該無線部222,係進行無線調變與解調變(modulation and demodulation)處理,並且具有以圖示的通訊品質量測部227進行量測與無線終端機5之間的通訊品質(例如接收電場強度)的通訊品質量測部227;該無線網路控制部244,係進行無線終端機5的無線網路的產生及構成管理;該路由表225,係記載有接收到從管理伺服器1對無線終端機5目的地所傳送信號時的傳遞目的地;而該無線通訊控制部226,係控制無線處理部222的全部功能,進行與中央控制部21之間的資料處理,並且進行天線開關221的控制。另外,在第3圖中,雖設有2個天線220,但設為3個以上亦可。Further, as shown in FIG. 3, the wireless processing unit 22 includes an antenna switch 221, a radio unit 222, a wireless I/F (interface) unit 223, a radio network control unit 244, and a routing table 225. a routing table and a wireless communication control unit 226; the antenna switch 221 is configured to switch a plurality of antennas 220; the wireless unit 222 performs a wireless modulation and demodulation process, and has a The illustrated communication quality measuring unit 227 performs a communication quality measuring unit 227 that measures the communication quality (for example, received electric field strength) between the wireless terminal unit 5; the wireless network control unit 244 performs the wireless terminal unit 5 The generation and configuration management of the wireless network; the routing table 225 describes the destination when receiving the signal transmitted from the management server 1 to the destination of the wireless terminal 5; and the wireless communication control unit 226 All functions of the wireless processing unit 222 are controlled, data processing with the central control unit 21 is performed, and control of the antenna switch 221 is performed. Further, in the third drawing, although two antennas 220 are provided, three or more antennas may be used.
如此構成的閘道器2係形成網狀網路的一部份,而無線處理部22則與無線終端機5進行通訊。The gateway 2 thus constructed forms part of a mesh network, and the wireless processing unit 22 communicates with the wireless terminal 5.
在無線處理部22中,無線網路控制部224,經由天線220及無線部222而與無線終端機5進行通訊。此外,進行對於全部的無線終端機5的位址分配、無線終端機5的向網狀網路的登錄處理及網狀網路的管理。In the wireless processing unit 22, the wireless network control unit 224 communicates with the wireless terminal device 5 via the antenna 220 and the wireless unit 222. Further, address allocation for all the wireless terminal devices 5, registration processing to the mesh network of the wireless terminal device 5, and management of the mesh network are performed.
此外,在閘道器2中,當中央控制部21從管理伺服器1經由光輸出/輸入部24及通訊控制部23接收要求資料(要求傳送在電力計6之量測資料)時,向無線處理部22內的無線網路控制部224進行傳遞。無線網路控制部224,係當接收由中央控制部21所傳遞的要求資料時,分析要求資料且掌握從管理伺服器1所指定之目的地的無線終端機5。而且,依據路由表225,經由無線I/F部223、無線部222、天線開關221及天線220進行傳送要求資料(傳遞)。Further, in the gateway 2, when the central control unit 21 receives the request data from the management server 1 via the light output/input unit 24 and the communication control unit 23 (requires transmission of the measurement data of the power meter 6), the wireless controller The wireless network control unit 224 in the processing unit 22 transmits the data. When receiving the request information transmitted by the central control unit 21, the wireless network control unit 224 analyzes the request data and grasps the wireless terminal device 5 destined for the destination specified by the management server 1. Further, according to the routing table 225, the transmission request data (transfer) is transmitted via the wireless I/F unit 223, the wireless unit 222, the antenna switch 221, and the antenna 220.
第4圖係為顯示無線終端機5的構成例圖。如圖所示,無線終端機5,係具備有複數個天線50、天線開關51、無線部52、無線I/F部53、資料中繼處理部54、路由表55、毗鄰終端資訊表56、通訊控制部57、計時(timer)部58、記憶部59、電力計通訊處理部60;該複數個天線50,係用以在與閘道器2及/或其他無線終端機5的無線通訊所使用;該天線開關51,係切換複數個天線50、該無線部52,係進行無線調變與解調變處理,並且以通訊品質量測部61量測與閘道器2及/或其他無線終端機5之間的接收電場強度;該資料中繼處理部54,係從閘道器2及/或其他無線終端機5所接收的資料之中,將不是傳給自身的資料向其他的無線機器(閘道器2或其他無線終端機5)進行傳遞;該路由表55,係用以記載不是傳給自身的資料(閘道器2或者其他無線終端機5為目的地之資料)的傳遞目的地;該毗鄰終端資訊表56,係保存與位在周邊的無線機器(閘道器2或者其他的無線終端機5)之間的電場強度、及從周邊的各無線終端機5至閘道器2為止的中繼數的資訊;該通訊控制部57,係具有作為控制天線開關51從複數個天線50之中選擇決定使用天線的使用之天線決定部的功能,並且具有處理傳給自身之資料的功能;該計時部58,係使用在為了定期地取得前述資訊(電場強度、中繼數資訊);該記憶部59,係記憶從電力計6所取得的量測資料;而該電力計通訊處理部60,係用以與電力計6進行通訊。另外,在第4圖中,雖設有2個天線50,但設為3個以上亦可。Fig. 4 is a view showing an example of the configuration of the wireless terminal unit 5. As shown in the figure, the wireless terminal device 5 includes a plurality of antennas 50, an antenna switch 51, a wireless unit 52, a wireless I/F unit 53, a data relay processing unit 54, a routing table 55, an adjacent terminal information table 56, The communication control unit 57, the timer unit 58, the memory unit 59, and the power meter communication processing unit 60; the plurality of antennas 50 are used for wireless communication with the gateway 2 and/or other wireless terminals 5. The antenna switch 51 switches a plurality of antennas 50 and the wireless unit 52 to perform wireless modulation and demodulation processing, and measures the gateway 2 and/or other wireless by the communication quality measuring unit 61. The received electric field strength between the terminal devices 5; the data relay processing unit 54 receives data not transmitted to itself from other materials received from the gateway 2 and/or other wireless terminal devices 5 The device (gate device 2 or other wireless terminal device 5) transmits the routing table 55 for recording the transmission of data not addressed to itself (the gateway device 2 or other wireless terminal device 5 as the destination data). Destination; the adjacent terminal information table 56 is stored with the wireless device located at the periphery Information on the electric field strength between the gateway device 2 or another wireless terminal device 5 and the number of relays from the surrounding wireless terminal devices 5 to the gateway device 2; the communication control unit 57 has The control antenna switch 51 selects and determines the function of the antenna determining unit that uses the antenna from among the plurality of antennas 50, and has a function of processing the data transmitted to itself; the timing unit 58 is used to periodically acquire the aforementioned information ( The electric field strength and the relay number information); the memory unit 59 stores the measurement data acquired from the electric power meter 6; and the electric power meter communication processing unit 60 is configured to communicate with the electric power meter 6. Further, in the fourth drawing, although two antennas 50 are provided, three or more antennas may be used.
如前述所構成的無線終端機5,在與閘道器2或者其他無線終端機5之間進行傳送接收資料。當無線終端機5接收資料時,資料中繼處理部54,確認是否為傳給自身的資料,為傳給自身的資料時,向通訊控制部57進行傳遞,並在通訊控制部57中進行處理。另一方面,不是傳給自身時,資料中繼處理部54,則根據路由表55決定中繼目的地,經由無線I/F部53、無線部52、天線開關51及天線50進行中繼資料。另外,在接收的資料內有路由資訊時,資料中繼處理部54,不根據路由表55而是根據路由資訊進行資料中繼處理。此外,在傳送對於來自管理伺服器1的量測資料傳送要求之回應資料時,向資料中繼處理部54傳遞回應資料(量測資料),並在資料中繼處理部54,根據路由表55決定中繼目的地,經由無線I/F部53、無線部52、天線開關51及天線50進行傳送回應資料。The wireless terminal device 5 configured as described above transmits and receives data to and from the gateway 2 or other wireless terminal device 5. When the wireless terminal device 5 receives the data, the data relay processing unit 54 confirms whether or not the data is transmitted to itself, and transmits the data to itself, to the communication control unit 57, and performs processing in the communication control unit 57. . On the other hand, when it is not transmitted to itself, the data relay processing unit 54 determines the relay destination based on the routing table 55, and relays the data via the wireless I/F unit 53, the wireless unit 52, the antenna switch 51, and the antenna 50. . Further, when there is routing information in the received data, the data relay processing unit 54 does not perform the data relay processing based on the routing information based on the routing table 55. Further, when the response data for the measurement data transmission request from the management server 1 is transmitted, the response data (measurement data) is transmitted to the material relay processing unit 54, and in the data relay processing unit 54, according to the routing table 55 The relay destination is determined, and the response data is transmitted via the wireless I/F unit 53, the wireless unit 52, the antenna switch 51, and the antenna 50.
通訊控制部57,係經由電力計通訊處理部60從電力計6取得量測資料。所取得的量測資料則儲存於記憶部59進行保存。The communication control unit 57 acquires measurement data from the electric meter 6 via the electric power meter communication processing unit 60. The acquired measurement data is stored in the storage unit 59 for storage.
計時部58,係當滿足預定的條件時開始計時,之後,當經過預定時間時,向通訊控制部57進行通知。接收了該通知的通訊控制部57,當對於週邊其他的無線終端機5傳送資訊資料(詳如後述)的要求,並接收屬於對此要求的回應信號的資訊資料回應時,將包含在所接收之資訊資料回應的資訊資料進行抽出。此外,此時,在無線部52中,通訊品質量測部61,進行資訊資料回應接收時的電場強度量測。由通訊控制部57所抽出之前述資訊資料、及由通訊品質量測部61所量測的電場強度,則儲存在鄰接終端機資訊表56。The timer unit 58 starts counting when the predetermined condition is satisfied, and then, when the predetermined time elapses, notifies the communication control unit 57. The communication control unit 57 that has received the notification is included in the received information when it transmits a request for information (see below) to the other wireless terminal devices 5 and receives a response to the response signal to the request. Information materials that are responded to by the information materials are extracted. Further, at this time, in the wireless unit 52, the communication product quality measuring unit 61 performs electric field intensity measurement at the time of receiving the information data response. The information material extracted by the communication control unit 57 and the electric field intensity measured by the communication product quality measuring unit 61 are stored in the adjacent terminal information table 56.
接著,針對本實施形態的無線通訊系統的動作,使用第5圖至第9圖進行說明。首先,於第5圖所示動作,亦即,在藉由閘道器2及無線終端機5A至5F所形成的網狀網路新加入無線終端機5G時的動作之一例進行說明。另外,無線終端機裝置5G係設成雖與無線終端機5A至5F中的任何一者均能夠直接通訊,但新設置於不能夠與閘道器2直接通訊的位置。無線終端機5G具備複數個天線(在此以天線#1、#2的2個作為說明),於加入網狀網路時,設為從複數個天線之中選擇使用一個天線。Next, the operation of the wireless communication system according to the present embodiment will be described using Figs. 5 to 9 . First, an operation shown in FIG. 5, that is, an operation when the mesh network formed by the gateway 2 and the wireless terminals 5A to 5F is newly added to the wireless terminal device 5G will be described. Further, the wireless terminal device 5G is configured to be able to directly communicate with any of the wireless terminal devices 5A to 5F, but is newly provided at a position that cannot be directly communicated with the gateway 2. The wireless terminal device 5G includes a plurality of antennas (herein two antennas #1 and #2 are described), and when the mesh network is added, one antenna is selected from a plurality of antennas.
當無線終端機5G被新設置時(步驟S11),無線終端機5G,首先,為了選擇於加入網狀網路後使用的天線,以藉由能夠直接通訊的其他無線終端機5(以下,稱為鄰接終端機)取得資訊資料作為條件(天線選擇條件),進行設定至閘道器2為止的中繼數(上限值)及與鄰接終端機之間的電場強度的臨限值(下限值)(步驟S12)。新設置的情形,以取得多數的資訊資料來選擇天線者為佳。因此,例如,設成至閘道器2為止的中繼數=在無線通訊系統所容許的最大中繼數、電場強度臨限值=最低接收電場強度。於第5圖所示的例中,無線終端機5A至5F則成為鄰接終端機。When the wireless terminal set 5G is newly set (step S11), the wireless terminal set 5G first, in order to select an antenna to be used after joining the mesh network, by other wireless terminal devices 5 capable of direct communication (hereinafter, In order to acquire the information material as a condition (antenna selection condition), the number of relays (upper limit value) set to the gateway 2 and the threshold value of the electric field strength to the adjacent terminal device (lower limit) Value) (step S12). In the case of new settings, it is better to obtain the majority of the information to select the antenna. Therefore, for example, the number of relays set to the gateway 2 = the maximum number of relays allowed in the wireless communication system, the electric field intensity threshold = the lowest received electric field strength. In the example shown in Fig. 5, the wireless terminal devices 5A to 5F become adjacent terminal devices.
無線終端機5G,接著,選擇屬於複數個天線之中的1個的天線#1(步驟S13),使用該天線#1,將***有在前述步驟S12所設定之天線選擇條件(至閘道器2為止的中繼數及與鄰接終端機之間的電場強度臨限值)的資訊資料要求以廣播(Broadcast)傳送(步驟S14)。The wireless terminal device 5G, next, selects an antenna #1 belonging to one of the plurality of antennas (step S13), and uses the antenna #1 to insert the antenna selection condition (to the gateway) set in the aforementioned step S12. The information material of the number of relays up to 2 and the electric field strength threshold value between the adjacent terminal devices is required to be broadcasted (Broadcast) (step S14).
接收了資訊資料要求的鄰接終端機(無線終端機5A、5B、5C、5D、5E、5F),則取得資訊資料要求內的天線選擇條件(至閘道器2為止的中繼數及與鄰接終端機之間的電場強度臨限值)。另外,在接收資訊資料要求時量測電場強度,並保持量測結果。而不將所接收之資訊資料要求向其他無線終端機5進行傳遞。When the neighboring terminals (wireless terminals 5A, 5B, 5C, 5D, 5E, and 5F) that have received the information request are acquired, the antenna selection conditions (the number of relays to the gateway 2 and the adjacent) in the information request are obtained. The electric field strength threshold between terminals). In addition, the electric field strength is measured while receiving the information request, and the measurement result is maintained. The received information material is not required to be transmitted to other wireless terminals 5.
此外,接收了資訊資料要求的無線終端機5A至5F,將至閘道器2為止的中繼數、及於接收資訊資料要求時所量測的電場強度(表示與無線終端機5G之間的通訊品質),與藉由資訊資料要求所取得之天線選擇條件作比較,在滿足天線選擇條件時,進行回傳含有將至閘道器2為止的中繼數的資訊作為資訊資料的資訊資料回應(步驟S15)。亦即,在「至閘道器2為止的中繼數≦天線選擇條件所顯示的中繼數」及「在資訊資料要求接收時所量測的電場強度≧天線選擇條件所顯示的電場強度臨限值」皆成立時,回傳資訊資料回應。如此地進行時,能防止無線訊務(traffic)不必要地增大,並且可抑制消耗電力。另外,無線終端機5G,在接收資訊資料回應時量測電場強度,並保持量測結果。Further, the wireless terminal devices 5A to 5F that have received the information request, the number of relays up to the gateway 2, and the electric field strength measured when receiving the information material request (represented with the wireless terminal device 5G) The communication quality) is compared with the antenna selection condition obtained by the information material request, and when the antenna selection condition is satisfied, the information of the information including the number of relays to the gateway 2 is returned as the information data. (Step S15). That is, "the number of relays to the number of relays to the gateway 2", the number of relays displayed by the antenna selection condition, and the electric field strength measured when the information data is requested to be received ≧ the electric field strength displayed by the antenna selection condition When the limit value is established, the information information is returned. When so performed, it is possible to prevent the wireless traffic from being unnecessarily increased, and it is possible to suppress power consumption. In addition, the wireless terminal device 5G measures the electric field strength when receiving the information data response, and maintains the measurement result.
無線終端機5G係在步驟S14傳送資訊資料要求後經過一定時間之後,將包含在由各鄰接終端機(無線終端機5A至5F)所接收之資訊資料回應的資訊資料(至閘道器2為止的中繼數的資訊)、及在接收資訊資料回應時所量測的電場強度作為天線#1的資訊(天線資訊)進行保持。The wireless terminal device 5G, after a certain period of time after transmitting the information material request in step S14, transmits the information material (in the gateway device 2) that is received by the information information received by each of the adjacent terminal devices (the wireless terminal devices 5A to 5F). The information of the relay number) and the electric field strength measured when receiving the information data are maintained as the information of the antenna #1 (antenna information).
接著,無線終端機5G選擇天線#2(步驟S16),並使用該天線#2,與前述的步驟S14同樣地,將***有在前述步驟S12所設定之天線選擇條件的資訊資料要求以廣播進行傳送(步驟S17)。Next, the wireless terminal device 5G selects the antenna #2 (step S16), and uses the antenna #2 to perform the broadcast of the information material request having the antenna selection condition set in the above-described step S12 in the same manner as the above-described step S14. Transfer (step S17).
接收了資訊資料要求的各鄰接終端機(無線終端機5A至5F),則與在前述步驟S14接收了資訊資料要求時同樣地,將至閘道器2為止的中繼數、及在步驟S17的接收資訊資料要求時所量測的電場強度,與藉由資訊資料要求所取得之天線選擇條件作比較,在滿足天線選擇條件時,進行回傳含有至閘道器2為止的中繼數的資訊的資訊資料回應(步驟S18)。When the adjacent terminal devices (the wireless terminal devices 5A to 5F) that have received the information request are the same as the case where the information material request is received in the above-described step S14, the number of relays to the gateway device 2 is reached, and in step S17 The electric field strength measured when receiving the information request is compared with the antenna selection condition obtained by the information data request, and when the antenna selection condition is satisfied, the number of relays including the number of relays to the gateway 2 is returned. The information information of the information is responded (step S18).
無線終端機5G係在步驟S17傳送資訊資料要求後經過一定時間之後,將包含在由各鄰接終端機所接收之資訊資料回應的至閘道器2為止的中繼數的資訊、及在接收資訊資料回應時所量測的電場強度作為天線#2的資訊進行保持。另外,從某個鄰接終端機至閘道器2為止的中繼數,係不受無線終端機5所選擇的天線之影響為固定,所以亦可在選擇天線#2之狀態下的接收資訊資料回應時以不抽出中繼數資訊之方式來進行以減低處理負荷。The wireless terminal device 5G receives the information of the number of relays up to the gateway 2 in response to the information data received by each of the adjacent terminals after a certain period of time has elapsed after the information material request is transmitted in step S17, and receives the information. The electric field strength measured at the time of data response is maintained as information of antenna #2. Further, since the number of relays from the adjacent terminal device to the gateway device 2 is not affected by the antenna selected by the wireless terminal device 5, the information information can be received in the state where the antenna #2 is selected. In response, the processing is performed without extracting the relay number information to reduce the processing load.
無線終端機5G在具備有3支以上天線時,將前述步驟S18執行後,選擇其他的天線重復同樣的處理(與步驟S14及S15同樣的處理)。When the wireless terminal device 5G includes three or more antennas, the same processing is repeated by selecting another antenna (the same processing as steps S14 and S15).
無線終端機5G,分別選擇(使用)所具備的各天線進行資訊資料要求的傳送及資訊資料回應的接收,並在天線資訊的收集結束時,根據所收集的天線資訊,決定要使用的天線(步驟S19)。針對該步驟S19之處理的詳細則將另外作說明。The wireless terminal 5G selects (uses) each of the antennas to perform the transmission of the information request and the reception of the information data response, and determines the antenna to be used according to the collected antenna information when the collection of the antenna information is completed ( Step S19). The details of the processing of this step S19 will be additionally described.
當無線終端機5G決定要使用的天線時,進行使用所決定的天線,將把最終目的地的設定於閘道器2之網路加入要求向閘道器2以直接或者經由鄰接終端機的方式進行傳送(步驟S20、S21)。在第5圖的例中,從無線終端機5G所傳送之網路加入要求係經由無線終端機5B到達至閘道器2。When the wireless terminal 5G determines the antenna to be used, the antenna determined by the use is used, and the network of the final destination set to the gateway 2 is added to the gateway 2 directly or via the adjacent terminal. The transfer is performed (steps S20, S21). In the example of Fig. 5, the network joining request transmitted from the wireless terminal 5G reaches the gateway 2 via the wireless terminal 5B.
接收了網路加入要求的閘道器2,於執行供以使要求源的無線終端機5G加入網狀網路的處理之後,並回傳網路加入回應(步驟S22、S23)。The gateway 2 that has received the network join request performs the process of adding the wireless terminal 5G of the request source to the mesh network, and returns the network join response (steps S22, S23).
當無線終端機5G將從閘道器2所傳送之網路加入回應以直接或者經由鄰接終端機進行接收時,即完成網路加入處理。When the wireless terminal 5G joins the response from the network transmitted by the gateway 2 to receive directly or via the adjacent terminal, the network joining process is completed.
藉由如前述的順序,無線終端機5G,在對網狀網路進行加入時,決定要使用的天線。By the sequence as described above, the wireless terminal set 5G determines the antenna to be used when joining the mesh network.
接著,定期地確認完成加入網狀網路的無線終端機(假定為無線終端機5G)使用之天線的變更必要性,在判斷為必要時,針對變更天線的動作,使用第6圖進行說明。該動作雖非為必須,但從無線通訊與有線通訊相較,為狀態(通訊品質)較不安定之情形、及有其他的無線終端機5會新加入於網狀網路、或者會從網狀網路脫離而改變中繼路徑的可能性之情形來看,最好是進行執行。Next, it is necessary to periodically check the necessity of changing the antenna used to complete the wireless terminal device (assuming the wireless terminal device 5G) to be added to the mesh network, and when it is determined that it is necessary, the operation of changing the antenna will be described using FIG. This action is not necessary, but compared to wireless communication and wired communication, the status (communication quality) is less stable, and other wireless terminals 5 will be newly added to the mesh network, or will be from the network. In the case where the network is disconnected and the possibility of changing the relay path is changed, it is preferable to perform it.
當向網狀網路的加入結束時,無線終端機5G係進行定期地啟動使用天線之變更必要性判斷(天線變更必要性判斷)的計時值的設定(初始化)(步驟S31)。例如,1小時進行一次天線變更必要性判斷時,將計時值設定成1小時。計時值的設定,係例如以通訊控制部57進行。之後,監視在步驟S31所設定的時間經過的與否(步驟S32),持續監視至設定時間經過為止(步驟S32:NO)。When the addition to the mesh network is completed, the wireless terminal device 5G performs setting (initialization) of the timer value for determining the necessity of changing the antenna (determination of the antenna change necessity) to be started periodically (step S31). For example, when the antenna change necessity determination is performed once every hour, the timer value is set to 1 hour. The setting of the timer value is performed, for example, by the communication control unit 57. After that, it is monitored whether or not the time set in step S31 has elapsed (step S32), and the monitoring is continued until the set time elapses (step S32: NO).
在步驟S31所設定的時間經過時(步驟S32:YES),無線終端機裝置5G,為了從鄰接終端機收集在使用之天線的變更必要與否的判斷所使用的資訊資料,以從鄰接終端機取得資訊資料作為條件(天線選擇條件),設定至閘道器2為止的中繼數(上限值)及與鄰接終端機之間的電場強度的臨限值(下限值)(步驟S33)。該步驟S33,係為與前述步驟S12同樣的處理。加入網路後的定期性處理時,為了避免無線電干擾(對其他通訊的干擾),限制鄰接終端機回應的條件,例如,設至閘道器2為止的中繼數=3、電場強度臨限值=90dBμV。另外,以僅設定中繼數與電場強度臨限值的任一方之方式亦可。When the time set in step S31 has elapsed (step S32: YES), the wireless terminal device 5G collects the information material used for the determination of the necessity of the change of the antenna used from the adjacent terminal device to the adjacent terminal device. Obtaining the information material as a condition (antenna selection condition), setting the number of relays (upper limit value) up to the gateway 2 and the threshold value (lower limit value) of the electric field strength to the adjacent terminal device (step S33) . This step S33 is the same processing as the above-described step S12. In order to avoid radio interference (interference to other communication) during the periodic processing after joining the network, the conditions for the response of the adjacent terminal are limited, for example, the number of relays set to the gateway 2 = 3, the electric field strength threshold Value = 90 dBμV. Further, it is also possible to set only one of the relay number and the electric field intensity threshold.
接著,無線終端機5G選擇屬於複數個天線之中的1個天線#1(步驟S34),並使用該天線#1,將***有在前述步驟S33所設定之天線選擇條件(至閘道器2為止的中繼數及電場強度臨限值)的資訊資料要求以廣播進行傳送(步驟S35)。該步驟S34,係為與前述步驟S14同樣的處理。Next, the wireless terminal device 5G selects one antenna #1 among the plurality of antennas (step S34), and uses the antenna #1 to insert the antenna selection condition set in the aforementioned step S33 (to the gateway 2) The information material of the number of relays and the electric field intensity threshold is required to be transmitted by broadcast (step S35). This step S34 is the same processing as the above-described step S14.
無線終端機5G,在一定時間內,確認是否已由鄰接終端機接收了資訊資料回應,在接收資訊資料回應時進行電場強度量測並保持量測值,並且保持資訊資料回應所示的中繼數(至閘道器2為止的中繼數)(步驟S36、S37、S38)。若在步驟S35傳送資訊資料要求後未經過一定時間之狀態(步驟S39:NO),則重複步驟S36至S38。另一方面,在經過一定時間時(步驟S39:YES),進行確認是否所有之天線的選擇已結束,亦即,確認是否已使用所具備之全部的天線之各者執行了前述步驟S35至S39(步驟S40)。全部天線的選擇未結束時(步驟S40:NO),切換至未選擇的天線(步驟S41),再次執行前述步驟S35至S39。在全部天線的選擇結束時(步驟S40:YES),根據屬於重複執行前述步驟S35至S398的處理所獲的之資訊的天線資訊,決定要使用的天線(步驟S42)。要使用的天線的決定方法,係與在前述網路加入動作中使用的天線決定方法同樣。The wireless terminal device 5G confirms whether the information data response has been received by the adjacent terminal device within a certain period of time, performs electric field strength measurement and maintains the measured value when receiving the information data response, and maintains the relay of the information data response. The number (the number of relays up to the gateway 2) (steps S36, S37, and S38). If the state of the certain time has not elapsed after the transmission of the information material request in step S35 (step S39: NO), steps S36 to S38 are repeated. On the other hand, when a certain period of time has elapsed (step S39: YES), it is checked whether or not all of the antennas have been selected, that is, whether or not the above-described steps S35 to S39 have been executed using each of the provided antennas. (Step S40). When the selection of all the antennas is not completed (step S40: NO), the antenna is switched to the unselected antenna (step S41), and the aforementioned steps S35 to S39 are executed again. When the selection of all the antennas is completed (step S40: YES), the antenna to be used is determined based on the antenna information belonging to the information obtained by repeatedly performing the processes of the aforementioned steps S35 to S398 (step S42). The method of determining the antenna to be used is the same as the method of determining the antenna used in the aforementioned network joining operation.
決定了要使用的天線後,無線終端機5G,更新從自身至閘道器2為止的中繼數(步驟S43)。當步驟S43結束時,返回至前述步驟S31進行計時值的設定。之後,繼續進行前述動作。After determining the antenna to be used, the wireless terminal device 5G updates the number of relays from itself to the gateway 2 (step S43). When the step S43 is ended, the process returns to the aforementioned step S31 to set the time value. After that, the above actions are continued.
接著,針對無線終端機5根據藉由進行資訊資料要求的傳送及資訊資料回應的接收所收集的天線資訊(從鄰接終端機至閘道器2為止的中繼數及接收資訊資料回應時的電場強度)決定要使用的天線之動作(前述步驟S19、S42的動作)的一例,使用第7圖至第9圖進行說明。Next, the antenna information collected by the wireless terminal device 5 based on the transmission of the information request and the reception of the information data response (the number of relays from the adjacent terminal to the gateway 2 and the electric field when receiving the information data) (Strength) An example of determining the operation of the antenna to be used (the operations of the above-described steps S19 and S42) will be described using Figs. 7 to 9 .
第7圖係為顯示表示無線終端機5與鄰接終端機之間的電場強度的通訊品質資訊之一例圖。在圖示的例中,將對應電場強度品質順位(rank)設為通訊品質資訊。以「1」為最高品質。Fig. 7 is a view showing an example of communication quality information indicating the electric field strength between the wireless terminal device 5 and the adjacent terminal device. In the illustrated example, the corresponding electric field strength quality rank is set as the communication quality information. "1" is the highest quality.
第8圖係為顯示在決定無線終端機5要使用的天線時所參照之資訊的圖,以一例而言,顯示前述無線終端機5G所參照(保持)的資訊。該資訊,係透過無線終端機5G從其他無線終端機(無線終端機5A至5H)接收資訊資料回應而獲得。此外,保持作為鄰接終端機資訊表56。Fig. 8 is a view showing information referred to when determining an antenna to be used by the wireless terminal device 5. For example, the information referred to (held) by the wireless terminal device 5G is displayed. This information is obtained by receiving information data responses from other wireless terminals (wireless terminals 5A to 5H) via the wireless terminal 5G. Further, it is held as the adjacent terminal information table 56.
在第8圖中,「終端編號」,係為唯一顯示周圍的各各無線終端機5的資訊(識別符)。在第8圖中,為說明上的方便,記載著與終端編號相對應的無線終端機。「由其他無線終端機所取得之至閘道器為止的中繼數」,係為顯示從與終端編號相對應的其他無線終端機(資訊資料回應的傳送源)至閘道器2為止的中繼數資訊(中繼數資訊),且從接收的資訊資料回應所抽出。「與位在周邊的無線終端機間的品質順位」,係為顯示在所具有之各天線(在圖示中為天線#1、天線#2)的接收資訊資料回應時的電場強度(通訊品質)之資訊。為了削減資訊量,將根據第7圖所示之表(電場強度與品質順位的對應表)把電場強度轉換為品質順位的資訊設為「與位在周邊的無線終端機間的品質順位」。在第8圖的例中,設無線終端機5G與無線終端機5A及5H之間的通訊為不穩定,且無線終端機5G無法接收來自無線終端機5A及5H的資訊資料回應。因此,與無線終端機5A及5H相對應的資訊(藉由其他無線終端機所取得之至閘道器為止的中繼數、與位在周邊的無線終端機間的品質順位)則成為「無回應」。「中繼數與品質順位的乘法計算值」,係為「由其他無線終端機所取得之至閘道器為止的中繼數」及「與位在周邊的無線終端機間的品質順位」的乘法計算結果。In Fig. 8, the "terminal number" is information (identifier) that uniquely displays each of the surrounding wireless terminal devices 5. In Fig. 8, for convenience of explanation, a wireless terminal device corresponding to the terminal number is described. The "number of relays from the other wireless terminal devices to the gateway" is displayed from the other wireless terminal (the transmission source of the information data response) corresponding to the terminal number to the gateway 2 Successive information (relay number information), and extracted from the received information data response. "Quality ranking between wireless terminals in the vicinity" is the electric field strength (communication quality) when the received information information of each antenna (in the figure, antenna #1 and antenna #2) is displayed. ) information. In order to reduce the amount of information, the information on the electric field strength converted to the quality order according to the table shown in Fig. 7 (correspondence table of electric field strength and quality order) is set as "quality ranking with the wireless terminal in the vicinity". In the example of Fig. 8, the communication between the wireless terminal device 5G and the wireless terminal devices 5A and 5H is unstable, and the wireless terminal device 5G cannot receive the information data response from the wireless terminal devices 5A and 5H. Therefore, the information corresponding to the wireless terminals 5A and 5H (the number of relays obtained by the other wireless terminal devices to the gateway and the quality order between the wireless terminals in the vicinity) becomes "none". Respond." The "multiplication calculation value of the number of relays and the quality order" is "the number of relays from the other wireless terminal devices to the gateway" and "the quality order between the wireless terminals that are located in the vicinity" Multiply the result.
第9圖係為顯示保持有第8圖所示之資訊(鄰接終端機資訊)的無線終端機5G要決定使用的天線順序之一例圖,顯示根據於第9圖所記載之天線選擇條件決定要使用的天線之情形的動作。天線選擇條件係由條件1至條件3所構成,在條件1,係將「至閘道器2為止的中繼數」設為「3以下」。在條件2,係將「品質順位」設為「5以上」。在條件3,係將「中繼數與品質順位的乘法計算值」設為「8以下」。Fig. 9 is a view showing an example of an antenna sequence to be determined by the wireless terminal unit 5G for holding the information (the adjacent terminal information) shown in Fig. 8, and the display is determined according to the antenna selection conditions described in Fig. 9. The action of the antenna used. The antenna selection conditions are composed of the conditions 1 to 3. In the condition 1, the "number of relays to the gateway 2" is set to "3 or less". In Condition 2, the "Quality Order" is set to "5 or more". In the condition 3, the "multiplication calculation value of the relay number and the quality order" is set to "8 or less".
無線終端機5G係在要使用天線的決定動作中,首先,特別界定滿足條件1的無線終端機5。於第9圖所示的例中,就滿足條件1的終端而言,可特別界定出無線終端機5B、5C、5D、5E。接著,對每個天線特別界定滿足條件2的無線終端機5。在第9圖所示的例中,於使用天線#1之情形就滿足條件2的終端而言,特別界定了無線終端機5B、5C、5D、5E、5F;於使用天線#2之情形就滿足條件2的終端而言,特別界定了無線終端機5B、5C、5D、5E、5F。復對每個天線特別界定滿足條件3的無線終端機5。在第9圖所示的例中,於使用天線#1之情形就滿足條件3的終端而言,特別界定了無線終端機5B、5C、5D、5F;於使用天線#2之情形就滿足條件3的終端而言,特別界定了無線終端機5B、5C、5D、5F。In the wireless terminal device 5G, in the determination operation of the antenna to be used, first, the wireless terminal device 5 that satisfies the condition 1 is specifically defined. In the example shown in Fig. 9, the wireless terminal devices 5B, 5C, 5D, and 5E can be specifically defined for the terminal that satisfies the condition 1. Next, a wireless terminal 5 that satisfies condition 2 is specifically defined for each antenna. In the example shown in FIG. 9, in the case of using the antenna #1, the terminal that satisfies the condition 2 specifically defines the wireless terminal devices 5B, 5C, 5D, 5E, 5F; in the case of using the antenna #2 For terminals that satisfy Condition 2, wireless terminals 5B, 5C, 5D, 5E, and 5F are specifically defined. The wireless terminal 5 that satisfies condition 3 is specifically defined for each antenna. In the example shown in FIG. 9, in the case where the antenna #1 is used, the terminal that satisfies the condition 3 specifically defines the wireless terminal devices 5B, 5C, 5D, and 5F; when the antenna #2 is used, the condition is satisfied. In terms of the terminal of 3, the wireless terminals 5B, 5C, 5D, and 5F are specifically defined.
當完成分別滿足條件1、條件2、條件3之終端的特別界定時,接著,無線終端機5G對每個天線抽出滿足條件1至3的無線終端機5(在第9圖的例中,在使用天線#1時及使用天線#2時的任何一者時,均抽出無線終端機5B、5C、5D)。然後,對每個天線計算出所抽出之無線終端機5的「中繼數與品質順位的乘法計算值」之平均值。亦即,計算出於使用天線#1時滿足條件1至3之無線終端機5的「中繼數與品質順位的乘法計算值」平均值、與於使用天線#2時滿足條件1至3之無線終端機5的「中繼數與品質順位的乘法計算值」之平均值。根據如前述所計算的結果,決定要使用的天線。具體而言,將小於計算出的平均值的天線予以決定為使用的天線。在圖示的例中,由於使用天線#1時的平均值=5,使用天線#2時的平均值=6.6。故將天線#1決定為要使用的天線。When the special definition of the terminals satisfying Condition 1, Condition 2, and Condition 3, respectively, is completed, then, the wireless terminal device 5G extracts the wireless terminal device 5 satisfying the conditions 1 to 3 for each antenna (in the example of Fig. 9, in When either antenna #1 or antenna #2 is used, the wireless terminals 5B, 5C, and 5D are extracted. Then, the average value of the "multiplied calculation value of the number of relays and the quality order" of the extracted wireless terminal unit 5 is calculated for each antenna. That is, the average value of the "multiplication calculation value of the relay number and the quality order" of the wireless terminal device 5 satisfying the conditions 1 to 3 when the antenna #1 is used is calculated, and the conditions 1 to 3 are satisfied when the antenna #2 is used. The average value of the "multiply calculated value of the number of relays and the quality order" of the wireless terminal device 5. Based on the results calculated as described above, the antenna to be used is decided. Specifically, an antenna smaller than the calculated average value is determined as the antenna to be used. In the illustrated example, the average value when antenna #1 is used = 5, and the average value when antenna #2 is used = 6.6. Therefore, the antenna #1 is determined as the antenna to be used.
另外,無線終端機5,在執行決定要使用的天線的處理之後,更新從自身至閘道器2為止的中繼數資訊。具體而言,在使用了所決定的天線時將從「中繼數與品質順位的乘法計算值」成為最小的無線終端機5至閘道器2為止的中繼數加上1者,設定作為從自身至閘道器2為止的中繼數。在圖示的例中,在使用所決定的天線#1時「中繼數與品質順位的乘法計算值」形成最小的無線終端機5為無線終端機5B。於是,由於從該無線終端機5B至閘道器2為止的中繼數為1,故將從自身至閘道器2為止的中繼數設定(更新)成2。Further, the wireless terminal device 5 updates the relay number information from itself to the gateway 2 after executing the process of determining the antenna to be used. Specifically, when the determined antenna is used, the number of relays from the wireless terminal device 5 to the gateway 2 that minimizes the "multiplication calculation value of the number of relays and the quality order" is set to one, and is set as The number of relays from itself to the gateway 2. In the illustrated example, when the determined antenna #1 is used, the wireless terminal 5 that is the smallest in the "multiplication calculation value of the number of relays and the quality order" is the wireless terminal device 5B. Then, since the number of relays from the wireless terminal device 5B to the gateway 2 is 1, the number of relays from the self to the gateway 2 is set (updated) to two.
如以上作法,無線終端機5,向網狀網路進行加入時(啟動時),以及在加入完成的狀態,定期地對於鄰接終端機傳送資訊資料要求以收集至閘道器2為止的中繼數、及與其他無線終端機之間的通訊品質(電場強度)資訊,然後進行決定要使用之天線(或者再決定)。As described above, the wireless terminal device 5, when joining the mesh network (at the time of startup), and periodically transmitting the information data request to the adjacent terminal device to collect the relay to the gateway device 2 when the joining is completed. Number, and communication quality (electric field strength) information with other wireless terminals, and then decide which antenna to use (or decide).
雖已針對決定要使用的天線時的動作進行說明,但無線終端機5,在從鄰接終端機(欲決定要使用的天線的無線終端機)接收了資訊資料要求時,將***有至閘道器2為止的中繼數的資訊資料回應回傳至傳送源的無線終端機5。Although the operation when determining the antenna to be used is described, the wireless terminal device 5 inserts the gateway to the gateway when it receives the information request from the adjacent terminal (the wireless terminal that determines the antenna to be used). The information of the number of relays up to the device 2 is transmitted back to the wireless terminal 5 of the transmission source.
根據前述,本實施形態的無線通訊系統,係含有至少1個固定設置在電力計附近的無線終端機、與至少1個將以電力計所量測的資料等以無線中繼的無線終端機所構成,無線終端機,保有複數個天線,在啟動時(向網狀網路的加入時)及向網狀網路加入完成的狀態中,定期地依序選擇、使用各天線,取得設置在周邊之其他的無線終端機所保持的至閘道器2為止的中繼數,並且量測與其他的無線終端機之間的通訊品質(電場強度),並根據通訊品質及中繼數,決定要使用的天線。藉此,考量對通訊品質的影響大之至閘道器2為止的中繼數及與鄰接無線終端機之間的電場強度,使用能獲得複數個天線之中最優良的通訊品質的天線而能夠進行通訊。結果,與僅考量與周圍的其他無線終端機之間的通訊品質而選擇要使用的天線的習知的系統相比,能夠實現更高可靠性的通訊。According to the above, the wireless communication system according to the present embodiment includes at least one wireless terminal that is fixedly disposed in the vicinity of the power meter, and at least one wireless terminal that wirelessly relays data measured by the power meter. In the wireless terminal, a plurality of antennas are reserved. During startup (when the mesh network is added) and when the mesh network is added, the antennas are periodically selected and used in sequence to obtain settings. The number of relays to the gateway 2 held by the other wireless terminal devices, and the communication quality (electric field strength) with other wireless terminals, and the quality of the communication and the number of relays are determined. Antenna used. In this way, it is possible to use an antenna that can obtain the best communication quality among a plurality of antennas by considering the number of relays that have a large influence on the communication quality up to the gateway 2 and the electric field strength between the adjacent wireless terminals. Communicate. As a result, higher reliability communication can be realized as compared with a conventional system that selects an antenna to be used only considering the communication quality with other wireless terminals in the vicinity.
此外,無線終端機,對於用以對其他無線終端機要求至閘道器2為止的中繼數之資訊的資訊資料要求,將顯示至閘道器為止的中繼數及資訊資料要求的接收品質(電場強度)的臨限值的天線選擇條件進行設定並傳送,另一方面,在接收資訊資料要求時,僅在滿足所設定之天線選擇條件時,回傳屬於對於要求之回應的資訊資料回應。藉此,接收資訊資料要求的無線終端機,係由於至閘道器為止的中繼數為在由天線選擇條件所指定的中繼數以下,並且資訊資料要求接收時的電場強度在由天線選擇條件所指定的電場強度臨限值以上時傳送資訊資料回應,故能夠抑制有關在取得天線選擇用的資訊資料的通訊與其他通訊間的無線電干擾。In addition, the wireless terminal device displays the number of relays to the gateway and the reception quality required for the information material for the information data request for the information of the number of relays required to the other wireless terminal devices to the gateway device 2. The antenna selection condition of the threshold value of (electric field strength) is set and transmitted. On the other hand, when receiving the information data request, the information information response to the response to the request is returned only when the set antenna selection condition is satisfied. . Therefore, the wireless terminal that receives the information request is that the number of relays until the gateway is below the number of relays specified by the antenna selection condition, and the electric field strength when the information material is required to be received is selected by the antenna. When the electric field strength specified by the condition exceeds the threshold value, the information data is transmitted, so that it is possible to suppress radio interference between the communication of the information material for obtaining the antenna selection and other communication.
根據前述,本發明之無線終端機裝置作為從複數個天線之中選擇1個天線作為進行通訊的無線終端機裝置而言極為實用,尤其適合於形成網狀網路的無線通訊終端。As described above, the wireless terminal device of the present invention is extremely useful as a wireless terminal device that selects one antenna from among a plurality of antennas for communication, and is particularly suitable for forming a wireless communication terminal of a mesh network.
1...管理伺服器1. . . Management server
2...閘道器2. . . Gateway
3...廣域網路網3. . . WAN
4...通訊電纜(光學電纜)4. . . Communication cable (optical cable)
5A、5B、5C、5D、5E、5F、5G、5H...無線終端機裝置5A, 5B, 5C, 5D, 5E, 5F, 5G, 5H. . . Wireless terminal device
6...電力計6. . . Electric meter
21...中央控制部twenty one. . . Central control department
22...無線處理部twenty two. . . Wireless processing unit
23、57...通訊控制部23, 57. . . Communication control department
24...光輸入輸出部twenty four. . . Optical input and output unit
50、220...天線50, 220. . . antenna
51、221...天線開關51, 221. . . Antenna switch
52、222...無線部52, 222. . . Wireless department
53、223...無線I/F部53,223. . . Wireless I/F department
54...資料中繼處理部54. . . Data relay processing unit
55、225...路由表55, 225. . . Routing table
56...鄰接終端機資訊表56. . . Adjacent terminal information table
58...計時部58. . . Timing department
59...記憶部59. . . Memory department
60...電力計通訊處理部60. . . Electric meter communication processing department
61、227...通訊品質量測部61,227. . . Communication quality measurement department
224...無線網路控制部224. . . Wireless network control department
226...無線通訊控制部226. . . Wireless communication control department
S11至S23...步驟S11 to S23. . . step
第1圖係為顯示含有本發明之無線終端機裝置的無線通訊系統之構成例圖。Fig. 1 is a view showing an example of the configuration of a wireless communication system including the wireless terminal device of the present invention.
第2圖係為顯示閘道器的構成例圖。Fig. 2 is a view showing an example of the structure of the gateway.
第3圖係為顯示閘道器具備的無線處理部之構成例圖。Fig. 3 is a view showing an example of the configuration of a wireless processing unit provided in the gateway.
第4圖係為顯示無線終端機之構成例圖。Fig. 4 is a diagram showing an example of the configuration of a wireless terminal.
第5圖係為顯示無線終端機加入網狀網路時之一例的順序圖。Figure 5 is a sequence diagram showing an example of when a wireless terminal is added to a mesh network.
第6圖係為顯示無線終端機進行變更使用天線之動作之一例圖。Fig. 6 is a view showing an example of an operation for changing the use of the antenna by the wireless terminal.
第7圖係為顯示通訊品質資訊之一例圖。Figure 7 is a diagram showing an example of communication quality information.
第8圖係為顯示無線終端機在決定要使用的天線時所參照資訊之一例圖。Figure 8 is a diagram showing an example of information referred to by the wireless terminal when deciding which antenna to use.
第9圖係為顯示保持有第8圖所示之資訊(鄰接終端機資訊)的無線終端機要決定使用的天線之順序的一例圖。Fig. 9 is a view showing an example of the order of the antennas to be used by the wireless terminal which holds the information (the adjacent terminal information) shown in Fig. 8.
2...閘道器2. . . Gateway
5A、5B、5C、5D、5E、5F、5G...無線終端機裝置5A, 5B, 5C, 5D, 5E, 5F, 5G. . . Wireless terminal device
S11至S23...步驟S11 to S23. . . step
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JP2010098595A (en) * | 2008-10-17 | 2010-04-30 | Fujitsu Ltd | Radio communication device, and radio communication method |
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CN101409678A (en) * | 2007-10-12 | 2009-04-15 | 三星电子株式会社 | Method for setting packet transmission path in AD HOC network, and network apparatus using the same |
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