JP2001285329A - System of optical repeater station connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collect quickly an optical repeater station condition information and all the slave station condition informations collectively in a master station, by reducing the load of information collection processing in the master station. SOLUTION: In the case that the slave station condition information in the master station is transmitted and stored from each of the multiple slave stations 3-1, 3-2 to the optical repeater station 5 by requisition of the optical repeater station 5 or by the master's initiative, whenever the command of the condition information collection is issued from the master station 2 to the optical repeater station 5. All the slave station condition informations and the optical repeater station condition information, which are stored in advance in the optical repeater station 5 with updating availability, is transmitted collectively from the optical repeater station 5 to the master station 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transmitting an optical signal in the upstream and downstream directions between a master station and a plurality of slave stations accommodated in parallel by the master station via a repeater. In particular, the present invention relates to a repeater connection type system which is configured to wait for a request from a master station. The present invention relates to a repeater connection type system in which slave station state information and repeater state information indicating various states of the self station are collectively transmitted.

[0002]

2. Description of the Related Art FIG. 2 shows an optical RF (RF:
1 shows a schematic system configuration as an example of a star connection type system for performing radio frequency (Radio Frequency) conversion transmission. As shown, the RF base station (BTS) 1 and the RF master station (M /
U) 2 is connected via an upstream / downstream coaxial cable, and its M / U 2 is connected to an optical star coupler 4 for distributing and synthesizing optical signals, and a plurality of RF slave stations via upstream / downstream optical cables. The system configuration is such that (S / U) 3 (3-1 to 3-4) is accommodated in parallel. This enables bidirectional optical signal transmission between the M / U2 and each of the S / Us 3-1 to 3-4. Incidentally, in this example, although not shown for the sake of simplicity of the drawing, each of the S / Us 3-1 to 3-4 is provided with a transmitting antenna and a receiving antenna in order to accommodate a wireless slave via a wireless line. It has been done.

In the system configured as described above, since each of the S / Us 3-1 to 3-4 is accommodated in the M / U 2 directly and in parallel,
As the S / Us 3-1 to 3-4 are remotely installed with respect to the M / U2, as upstream and downstream optical cables laid between the M / U2 and each of the S / Us 3-1 to 3-4. It is necessary to have a large track length. In other words, the more the S / Us 3-1 to 3-4 are remotely installed, the more time and labor required to lay those optical cables,
Costs are required, and as a result, the system configuration is economically disadvantageous.

As shown in FIG. 3, M / U2 and S / U3-1 to 3 are used to solve the above problems in the system configuration.
It is conceived that a repeater (HUB) 5 is interposed and installed between each of them. The upstream and downstream optical cables laid between the M / U2 and the repeater 5 are S / U3-
The relay 5 and the S / S
The upstream and downstream optical cables laid between each of the U3-1 to U3-4 have a small line length, and as a result, the economical problems in the system configuration shown in FIG. 2 are solved. Is what is being done.

[0005]

By the way, apart from the system configuration, in general systems as shown in FIGS. 2 and 3, in order for the master station to constantly and accurately monitor and control the slave station, various kinds of information are provided in each slave station. The status (including the measured value of the ambient temperature, etc.) is always collected and grasped as a monitoring result by the master station, and each of the slave stations needs to be properly controlled according to the monitoring result. . In order for the master station to collect various states in each slave station, a polling method is generally adopted. Each time the master station sequentially designates slave stations, the designated slave station receives a status information collection command from the master station directly or via a repeater, while responding to the status information collection command as: The slave station status information (including slave station identification information) indicating various states in the slave station is transmitted from the slave station to the master station directly or via a repeater.
If a repeater is installed, repeater status information (including repeater identification information) indicating various conditions (including measured values such as ambient temperature) at the repeater is also collected at the master station by polling. It is allowed. However, when the slave station status information from the slave station is transmitted from the repeater, the relay station status information can be transmitted to the master station as a state added to the slave station status information.

[0006] However, the conventional polling method is performed exclusively on a slave station basis. Therefore, it takes a lot of time to collect slave station status information on all slave stations in the master station. That is undeniable.

An object of the present invention is to provide a repeater connection type system in which repeater status information and all slave station status information can be collectively collected promptly, while reducing the collection processing load on the master station.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a communication system in which each of a plurality of slave stations transmits and stores slave station state information in the relay station upon request from the repeater or voluntarily. As a request from the master station, that is, after waiting for a state information collection command, the repeater sends the master station all the slave station state information and repeater state information stored in the repeater in advance as being updatable. This is achieved by configuring the system so that it is transmitted collectively.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a schematic system configuration of an example of a repeater connection type system according to the present invention.
As shown, M / U2, repeater 5 and S / U3-
The approximate connection positional relationship in the system configuration of these three parties, such as 1, 3-2, is almost the same as that already described in FIG. The points substantially different from those shown in FIG. 3 can be summarized in the following characteristic items (1) to (3).

[0010] (1) Each of the S / Us 3-1 and 3-2 transmits slave station status information to the repeater 5 at the request of the repeater 5 or voluntarily. . (2) In the repeater 5, in addition to the slave station state information from each of the S / Us 3-1 and 3-2, the own repeater state information is stored as being updatable. (3) When a status information collection command is transmitted from the M / U 2 to the repeater 5 periodically or as needed, the repeater 5 stores the command as an update in the repeater 5 as a response thereto. The relay station status information and all slave station status information are transmitted to the M / U 2 in a lump.

As can be seen from the above characteristic items (1) to (3), the M / U 2 reduces the collection processing load, and every time a state information collection command is transmitted to the repeater 5,
It is possible to collectively collect the repeater status information and all the slave station status information transmitted collectively from.

Hereinafter, the characteristic items (1) to (3) will be described in detail in order. First, regarding the characteristic item (1), the repeater 5 uses the S / U 3-1 and 3-2. Various methods are conceivable as a method for collecting the slave station state information from each of them. As a typical method, a method is conceivable in which the repeater 5 collects data by a polling method independently of the M / U 2, that is, under the initiative control of the repeater 5. In the repeater 5, the microcomputer 5
1 periodically or whenever the S / Us 3-1 and 3-2 are sequentially designated, the designated slave station is provided with the microcomputer 51.
From the optical signal distributor 54, E / O
This is transmitted via the (electric / optical) converter 56. In the designated slave station, the status information collection command is transmitted to the microcomputer 31 via the O / E (optical / electric) converter 32.
Is received, the various states collected and stored in the microcomputer 31 so far are transmitted from the microcomputer 31 as slave station state information in response to the state information collection command. The slave station state information from the microcomputer 31 is stored in the microcomputer 51 via the E / O converter 33, the O / E converter 57, and the optical signal combiner 55 as updatable.

As described above, in the microcomputer 51, S
/ U3-1 and / 3-2 can be stored as updatable, but as another method of collecting the slave station status information, while avoiding duplication of transmission periods,
For example, it is conceivable that each of the S / Us 3-1 and 3-2 transmits the slave station state information to the repeater 5 periodically under autonomous control or as needed.

Next, the characteristic item (2) will be described. As described above, the S / U3−
Although the slave station state information from each of 1, 3-2 is stored as being updateable, various states are collected in the repeater 5 and the M / U 2 monitors the state as repeater state information.
The repeater status information is stored together in the microcomputer 51 as updatable.

Finally, the characteristic item (3) will be described. The microcomputer 21 in the M / U 2 sends the E / O converter 2
2. The microcomputer 51 in the repeater 5 via the O / E converter 52
Irrespective of the operation of the microcomputer 51,
The status information collection command can be transmitted periodically or as needed. Each time a status information collection command is transmitted to the microcomputer 51, the microcomputer 51 responds to the request by transmitting the status information collection command to the microcomputer 51 so that it can be updated in the microcomputer 51. Are collectively transmitted to the microcomputer 21 via the E / O converter 53 and the O / E converter 23. This allows the microcomputer 21 to reduce the collection processing load,
Repeater status information and all slave station status information can be quickly and collectively collected.

[0016]

As described above, according to the first aspect, the collection processing load on the master station is reduced, and the repeater status information and all the slave station status information can be quickly and collectively collected. ing.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic system configuration in an example of a repeater connection type system according to the present invention;

FIG. 2 is a diagram illustrating a schematic system configuration of an example of a star connection type system that performs optical RF conversion transmission according to the related art.

FIG. 3 is a diagram showing a schematic system configuration of an example of a star connection type system for performing optical RF conversion transmission in which a repeater is interposed between a master station and each slave station, similarly;

[Explanation of symbols]

2 ... master station (M / U), 3 (3-1, 3-2) ... slave station (S
/ U), 5 ... repeater (HUB)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04B 10/16 H04B 9/00 J 9A001 H04L 12/24 H04L 11/08 12/26 H04Q 9/00 321F Terms (reference) 5K002 AA06 BA04 DA12 EA05 FA01 GA03 5K030 GA03 GA14 HA05 HC14 JA11 JL03 MC07 5K033 AA02 AA03 CA01 DA01 DA15 DB06 DB18 DB22 EA07 5K048 AA08 BA21 CA06 DA02 DB02 EB12 HA01 HA02 HA03 5K0 AE11 EB27 EB11H27

Claims (1)

[Claims] 1. A repeater connection in which a master station is configured to transmit an optical signal in an up / down direction between a plurality of slave stations accommodated in parallel with the repeater via a repeater. Type system, in order to collect at least the repeater status information and a plurality of slave station status information collectively in the own station, periodically issue a status information collection command to the repeater,
Alternatively, a master station that transmits data from time to time, a plurality of slave stations that transmit slave station status information indicating various states at the own station to the repeater upon request from the repeater or voluntarily, In a state in which the slave station status information and the repeater status information indicating various states at its own are stored as updatable, the slave station status information and the repeater status information are waited for a status information collection command from the master station. A repeater connection type system comprising: a repeater for collectively transmitting to a master station.