JPH05300051A - Allocation method for radio frequency of active system and standby system in radio system - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A long-term stable frequency band shall be selected as the radio frequency of the working channel, and the radio frequency of the backup channel should be a stable system in the short term. Establish a method of allocating radio frequencies in which various frequency bands are selected. [Structure] n active systems among multiple N systems
Generates control signal C necessary for system replacement by constantly monitoring and analyzing M1 to Mn and line quality information for each system of one spare system SP and reception level information of radio wave propagation path With the monitoring and analysis circuit 1, the radio frequency channel that produces a stable received signal over a long period with less fading will be the future active system M1 to Mn, and the short-term stable radio frequency channel will be the standby system in the future. Like the SP, it is configured to replace n active systems with 1 standby system among N systems.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of allocating radio frequencies of communication channels of a plurality of active systems and a standby system in a radio transmission system.

[0002]

2. Description of the Related Art In a conventional radio system, radio frequency allocation as a radio channel of a plurality of active systems and a standby system does not take into consideration the line quality due to the propagation characteristics of radio frequency signals of those channels. In addition, as shown in the explanatory view of FIG. 3, the order of frequencies was fixed. At the time of system planning, a method for predicting and evaluating the system stability of each wireless channel in a specific section of wireless transmission has not been established, and all can be evaluated only after actually operating. In traditional wireless systems,
Even if a radio frequency channel with more stable transmission characteristics is assigned to the active system, there is no function to constantly monitor the status information of each system in detail, and there is also a function to change the standby system to any radio channel. The current situation is not to have it.

[0003]

However, from the viewpoint of the operation of the wireless system, the radio frequencies of the wireless channels of the active systems M1 to Mn are less likely to cause fading on the wireless transmission path in the middle. It is sufficient to select a frequency band so that the system will be stable over the long term, while it is sufficient if the radio frequency of the channel of the backup system SP is selected so that the system is stable over the short term. An object of the present invention is to select, as the radio frequency of the channel of the active system among a plurality of systems, a long-term stable frequency band in which fading in the midway radio transmission path is small, and to select the radio frequency of the channel of the standby system. The frequency is to establish a method of allocating a radio frequency of a radio channel in a radio system in which a frequency band is selected so as to be a stable system in the short term.

[0004]

The basic configuration of the present invention for achieving this object is shown in the principle diagram of FIG. In the figure, reference numeral 1 constantly monitors the line quality information and the reception level information of the radio wave propagation path per unit time of each of the n active systems M1 to Mn and the spare system SP of the N systems. A monitoring analysis circuit for generating a control signal C necessary for replacement of the active system and the standby system by analyzing,
The radio frequency channel with which a stable reception signal can be obtained in the long term with less occurrence of fading in the radio wave propagation path will be the future active systems M1 to Mn, and the short-term stable radio frequency channel will be the future standby system SP. And so on
In the system of N, n active systems M1 to Mn are replaced with one spare system SP.

[0005]

In the present invention, the monitoring / analyzing circuit 1 receives the line quality information and the radio wave propagation path per unit time of each system of the N active systems M1 to Mn and the spare system SP in total of N systems. By constantly monitoring and analyzing the level information, n active systems M1 to Mn and one standby system SP
The control signal C necessary for switching the radio frequency is generated, and the long-term stable radio frequency channel with less fading in the radio transmission path is set as the future active system M1 to Mn, and the short-term stable radio frequency channel is set. Future backup system
As in SP, the system is replaced with n active systems M1 to Mn out of N = n + 1 systems and one spare system SP.

[0006]

FIG. 2 is a block diagram of an embodiment for realizing a method of allocating radio frequencies of an active system and a standby system in a radio system of the present invention. In FIG. 2, (1) is a line switching device on the transmission end side. SW, which switches the faulty system to one spare system SP and outputs it when any one of the n active systems M1 to Mn fails
(= n + 1) Switch on the sending side that swaps the N-to-N system
Output to EX _T. The N-to-N exchange EX _T on the transmitting side transmits the transmitted signals of N = n + 1 system at the input by the control signal C ₁ to n.
The active systems M1 to Mn and the standby system SP are interchanged and output. (2) is N transmitters TX,
The N system transmission signals from the N-to-N exchange EX _{T on} the transmission side are output to the reception side as radio frequency transmission waves.
(3) is the N receiving devices RX on the receiving side, which output the received signals received by each to the N-to-N exchange EX _R on the receiving side,
The N to N exchange EX _R outputs the received signals of the input N = n + 1 systems by exchanging the n active systems M1 to Mn and the spare system SP with the control signal C ₂ . (4) is the line switching device SW on the receiving side, which is an N-to-N switch on the receiving side.
Received signals of N = n + 1 systems from EX _R are input and n of them are output as active systems M1 to Mn. Monitoring Analysis circuit 1 of the present invention is composed of a propagation path state monitoring sensor 1 ₁ and the propagation path state information analyzer 1 ₂ and line quality monitoring sensor 1 ₃ and channel quality information analyzer 1 ₄ and the control unit 1 ₅ .. The propagation path state monitoring sensor 1 _1, as the propagation path state information between each provided on each of N transmission device (2) of the N reception devices (3), the bit error of 1 minute rate, bit error rate of 1 second, to collect and error-free time of no bit error, the quality of the radio wave propagation information for each system each are collected and analyzed by the propagation path state information analyzer 1 _2. The line quality monitoring sensor 1 _3, wherein the receiving end of the line switching unit
The line quality information of each output of the N receivers (3) provided in (4) includes the occurrence probability of the reception level decrease, the fluctuation rate of the reception level, the occurrence probability of the deviation within the predetermined band, and the etc. collect changing speed of the deviation, the quality of reception output of the system each have collected and analyzed by the channel quality information analyzer 1 _4. And the results were analyzed by the results analyzed by the propagation path state information analyzer 1 ₂ and the line quality information analyzer 1 ₄ is collected in the control unit 1 _5, comprehensive manner determined by the control unit 1 ₅ Control signals C _{1 and} C ₂ to generate the control signals C _{1 and} C _{2 in addition} to the exchanges EX _T on the transmission side and the exchanges EX _R on the reception side, and the occurrence of fading on the wireless transmission path between the transmission side and the reception side is small in the long term A plurality of N = n + 1 systems are replaced so that stable radio frequency channels will be used as future active systems M1 to Mn and short-term stable radio frequency channels will be used as future backup systems SP. Incidentally, the propagation path state information analyzer 1 ₂ results were analyzed by the results were analyzed by the channel quality information analyzer 1 ₄ and the control unit 1 ₅
The result of the comprehensive judgment of the output of the
Monitored at ₁₆ .

[0007]

As described above, according to the present invention,
(1) Propagation status of lines while operating multiple N = n + 1 lines
_, A channel of good channel quality radio frequency, can be assigned to n of the active system. (2) It is possible to allocate the optimum n radio channels to the active system for each season for each region. (3) Since the propagation state _and line quality of each line of multiple N lines are monitored, if a code error occurs on a certain line, it may be due to equipment failure or the spatial state of the wireless propagation path. Therefore, it is easy to determine whether it is due to the above, and it is possible to obtain an effect that the maintenance of the device is surely performed.

[Brief description of drawings]

FIG. 1 is a principle diagram showing a basic configuration of a method of allocating radio frequencies of an active system and a standby system in a radio system of the present invention.

FIG. 2 is a configuration diagram of an embodiment of a method of allocating radio frequencies of an active system and a standby system in a radio system of the present invention.

FIG. 3 is an explanatory diagram of a radio frequency allocation method of a working system and a standby system in a conventional radio system.

[Explanation of symbols]

1 monitoring analysis circuit, 1 ₁ propagation path state monitoring sensor, 1 ₂ propagation path state information analyzer 1 ₃ line quality monitoring sensor, 1 ₄ channel quality information analyzer 1 ₅ controller, 1 ₆ Is the monitoring equipment of the manned monitoring station.

Claims (1)

[Claims] 1. Constant monitoring and analysis of unit time line quality information and reception level information of each radio wave propagation path of each system of a plurality (N) of active systems (M1 to Mn) and a standby system (SP). With a monitoring and analysis circuit (1) that generates a control signal (C) necessary for system replacement, a radio frequency channel that provides stable reception signals over a long period with less fading in the radio wave propagation path is provided. Future working system (M1
~ Mn), and assigning the radio frequency of the active system and the standby system in the radio system characterized by performing system replacement so that the channel of the radio frequency that is stable in the short term becomes the future standby system (SP). ..