JPH04360324A - Rising method for radio network - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for starting up a wireless network using weak radio or low power radio.

0002

2. Description of the Related Art In applications such as the distribution field or equipment assembly lines, data generated in each process is collected in a central computer and used for operational planning. Recently, there has been a rapid increase in the use of wireless networks in these fields due to the need to enable the free movement of equipment and the difficulty and cost of laying cables to connect terminals. There is. In the case of using such a network using wireless lines, wireless stations are installed in a relatively wide area and service can be provided at any location. Conventionally, a base station with a tall tower is installed in the center of the service area. It is common for all mobile stations or fixed stations to communicate via a base station.

0003

[Problems to be Solved by the Invention] However, this method has a problem in that it requires a huge amount of cost to install the base station. To avoid this, a method can be considered in which relay stations are installed at appropriate intervals. However, in this case, it is necessary to set (store) communication route information in each station to start up the system including relay stations, but setting up such information is quite complicated and difficult. This problem becomes more pronounced as the number of stations increases. In addition, in order to enable quick startup even in the event of a power outage, it is desirable to have an uninterruptible power source for wireless stations, but this increases cost, so methods such as making memory non-volatile are recommended. Be taken. In this case, it is desirable to reduce the amount of data to be stored to reduce the capacity and to lengthen the retention time. Therefore, an object of the present invention is to facilitate the setting of communication route information in a wireless communication system that is based on relaying, and to also be able to cope with power outages.

0004

[Means for Solving the Problems] In order to solve such problems, the present invention consists of a plurality of radio stations, and when radio waves cannot directly reach the final destination station using a radio line, at least one When initially starting up a wireless communication system that relays wireless stations to form a network, the same information containing the identification codes of all wireless stations connected to the system must be registered for all wireless stations or specific stations. When the system is started up, the connection status between stations is searched based on instructions from any station or a specific station, one or more optimal routes are determined based on the connection status table created from this connection status, and each A wireless station is characterized by storing only the route information necessary for its own station in nonvolatile memory, and enabling subsequent operations based on the stored data.

[0005]

[Operation] When a wireless network is initially launched, the same initial information is registered for all wireless stations, and link relationships between each station are automatically created from this information, and communication routes between stations are determined. By storing only the route information necessary for the own station in a nonvolatile memory, it is possible to cope with not only normal times but also during power outages.

[0006]

[Embodiment] FIG. 1 is a schematic diagram showing an embodiment of this invention.
6 indicates each wireless station. Further, the arrows in the figure indicate the link relationships of the respective wireless stations, which were confirmed based on electric field strength, etc., for example, before the wireless stations were installed. This can be summarized as shown in Figure 2. The "○" mark in FIG. 2 indicates that communication is possible, and the "x" mark indicates that communication is impossible. FIG. 3 shows an example of the configuration of a wireless station. That is, each radio station has a receiver 11 that receives radio waves and converts them into digital data, a transmitter 12 that converts the digital data and transmits it on the radio waves, and a buffer that temporarily stores received data or transmitted data. It is comprised of a memory 13, a control section 14 that performs data transmission/reception and data transfer control, a table 15 for storing data as shown in FIG. 2, a transmitting/receiving antenna 16, and the like. An input device, a display device, etc. are also provided as necessary.

[0007] The operation will be explained. First, all stations have the same information as shown in Figure 4, which has an area for storing all the station numbers (identification symbols) connected to the system and link-related information to the next station. Register to each station. Next, each station communicates with all the stations registered in this way, and automatically creates a table as shown in FIG. This can be easily created by, for example, having one station serve as a representative and sequentially searching for routes to other stations, or each station communicating with other stations one by one and notifying the other stations of the results. can do.

[0008] Once the link table as shown in Figure 2 is created,
Each station then automatically creates a route table as shown in FIG. This is an example of a route table for wireless station 1. Such a route table may be created by each wireless station, or a representative station in the network may create and transmit route information to each station. In addition, in a system where data from all stations is collected in one specific station, each station is
It is sufficient to memorize only the route to the station. In this way, the initial information registered in each station when starting up the network is unified, and route information is automatically created when the system is in operation. Furthermore, by storing the obtained route table in the nonvolatile memory (table 15 in FIG. 3, etc.) of each station, it becomes possible to cope with accidents such as power outages. At this time, if each station stores only data related to one of the most suitable communication routes and related to its own station, the memory capacity can be reduced.

[0009]

[Effects of the Invention] According to the present invention, when starting up a wireless system, it is basically only necessary to register all the station numbers (identification symbols) connected to the system, so the setting work is greatly streamlined. This gives you the advantage of Furthermore, since the finally determined route information has a small capacity and is easy to store, even if a power outage occurs, normal operation can be quickly restored after power is restored.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram for explaining an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a link table in the case of FIG. 1;

FIG. 3 is a block diagram showing a configuration example of a wireless station.

FIG. 4 is an explanatory diagram for explaining an example of initial information to be registered in each station in FIG. 1;

FIG. 5 is an explanatory diagram for explaining an example of a route table for the wireless station 1;

[Explanation of symbols]

1 Radio station 2 Radio station 3 Radio station 4 Radio station 5 Radio station 11 Receiver 12 Transmitter 13 Buffer memory 14 Control section 15 Table 16 Antenna

Claims (1)

[Claims] Claim 1: An initial setup of a wireless communication system consisting of a plurality of wireless stations, which uses a wireless line to form a network by relaying at least one wireless station when radio waves cannot directly reach the final destination station. When starting up the system, register the same information containing the identification codes of all the wireless stations connected to the system to all the wireless stations or specified stations, and when the system is started up, the same information containing the identification codes of all the wireless stations connected to the system can be registered. Search the connection status between stations, determine one or more optimal routes based on the connection status table created from this connection status, and each wireless station stores only the route information necessary for itself in nonvolatile memory. and enable subsequent operation based on the stored data.