JPS59189742A - System for increasing capacity of carrier telephone line - Google Patents

Abstract

PURPOSE:To shorten the time of line disconnection accompanied with construction by adding a branching filter to an already provided device in each corresponding station and adding branching filters to the input side and the output side in a branch station and not abandoning already provided devices but using them continuously as they are when the capacity of an already provided circuit is increased. CONSTITUTION:Branching filters 10, 11, 12, and 13 are installed in 4 places, in this example, between radio devices M as already provided devices and supergroup translating equipments 1 and 3 and a branch device 7, and base band parts of individual already provided devices are connected to low-pass filters 10-2, 11-2, 12-2, and 13-2 constituting these branching filters. By this constitution, the time of inserting installation of each branching filter to the system is shortened, and especially, it can be used without adjusting if the gain of each low- pass filter is set to 1. That is, an additional channel of channel 300 connects high-pass filters 10-1, 11-1, 12-1, and 13-1 constituting respective branching filters and supergroup translating equipments 14 and 15 connecting group translating and channel translating equipments 8 and 9 corresponding to the additional channel.

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to a carrier telephone line capacity increase method for adding call paths to an existing system operated by the FDM wireless carrier method. More specifically, it relates to a method for increasing line capacity by adding a communication path to a higher frequency band of the baseband used in an existing system. 1. (Prior Art) Conventional method for increasing line capacity in this type of system. As, large N @- after all the final conversion stages are increased.

In addition, if the system had a branch station, the branch station there would also have to be replaced with a device compatible with the base/bandwidth band after the capacity increase. As an example of F1, a case will be described in which 300 channels are added to an existing 7 stem having a branch station and 960 channels to increase the line capacity to 126 (l channels).

Figure 1 shows an example of frequency allocation in the baseband.
) shows the case where 300 channels are added to make +260 channels.

Figure 2 is a diagram showing an example of the line configuration of the existing 7 stems.
There are 60 channels between stations and stations B and 900 channels between stations A and C. In the figure, station A,
Station 0 is an opposing station, and station B is a branch station. or,
1, 2, ? is a supergroup conversion device for 960 channels (+4, 5.6 is a group conversion 9 channel conversion device, and configures a transport device with its own device as a gradient. Also, 7 is a branching device, and M is a radio device. be.

Figure 3 is a line configuration diagram in which the line capacity has been increased by d° to the single installed system in Figure 2, with 300 channels between stations A and C.
indicates that the channel is being increased. 77 in the figure, ,?
/.

3' is volume 1. (The supergroup conversion devices 6° and 7', which were newly replaced and installed due to the increase in capacity, are leak branch devices newly replaced and installed due to the increase in capacity. 8 and 9 are group conversion devices for the additional 300 chitonels.・It is a communication path conversion device.

In this way, conventional methods for increasing capacity can be achieved by increasing the capacity of existing facilities. 11
- Conversion device 1.2.3 is for 960 channels to 12G (
Supergroup transform device for l channel (to °J / , , :z
It is necessary to replace it with l, 3/. In particular, at station B, which is a branching station, the supergroup transform device 2
It was necessary to replace it with a supergroup transformer 2'.

Here, the replacement of the supergroup transform device at station B, which is a branch station, will be described. That is, the receiving section of the supergroup transform device 2 of the B station receives all 96 (1 G; - 11 each is implemented once, and a 60-channel line is configured between the A station and the A station.In the second configuration, when 300 channels are added between the A station and the C station, the super 11η of the B station is 12 also in the receiving section of the converter 2
Total baseband frequency of 60 channels, i.e. 60
A frequency of ~5636 kHz will be given.

However, the supergroup transform device 2 of station B uses the base frequency for the existing 7 stations, that is, 60 to 4028.
It is designed with a frequency of kHz and a line capacity of 960 channels, so the received input signal exceeds the design conditions. In this case, the input power to the receiving amplifier (not shown) increases by 300 channels, which causes distortion and noise.
11 tones will increase, resulting in an increase in the number of H tones for the required 60 channels. In addition, when the received input signal goes around to the transmitting side, near-end crosstalk occurs at the opposite station, but the supergroup converter 2 for 960 channels only guarantees the crosstalk up to 4028 i < Hz. . Therefore, 5636 channels of 1260 channels due to line expansion as mentioned above
When a frequency of kHz is input, the wraparound increases, and the near-end congestion of the additional 300 channels at the opposing station worsens. For the reasons mentioned above, in the B branch station, due to the increase in line capacity, it becomes necessary to replace the supergroup transform device 2 with a new device that can accommodate the increase in capacity. Also, for the branching device 7 at the B station, it is necessary to replace it with a new device to cope with the increase in capacity for the same reason as the reason for replacing the supergroup transform device 1b.

As detailed above, in the conventional approach, when the line capacity is increased, the above-mentioned equipment must be replaced with a new device to accommodate the increase in line capacity.
Waste due to disposal of existing equipment.

Large-scale conversion work and associated long-time adjustment work are required, which requires huge costs, and furthermore, there are operational issues such as long service hours due to disconnection of existing lines. Ta.

(Objective of the Invention) The present invention was made to eliminate such problems, and when dealing with an increase in the number of existing lines, it is possible to continue using the existing equipment without discarding it. The purpose of the present invention is to provide a method for increasing line capacity that shortens the time during which lines are disconnected due to construction work and has a significant effect on serviceability and economic efficiency.

(Structure of the Invention) That is, in each opposing station, I'A exists! A branch station is constructed by adding a branching filter to each of the input and output sides of the branch station, and with this configuration, the above-mentioned purpose can be achieved. It's □ru. Hereinafter, the present invention will be explained in detail using the drawings.

Embodiment Figure 4 is a line configuration diagram showing an embodiment of the present invention.
In the figure, 10, 77, 72, 7, ? is a branching filter, 1
4゜15 sets the additional channel to the baseband frequency +4 (
It is a supergroup conversion device that converts from +/I to 5636 kHz. 70-7.

11-1.12-1.13-1 and 7Q-2゜17-
2, 1.7-2, and 14-2 are a high-pass filter and a low-pass Mm filter, respectively, which constitute a branching filter corresponding to 7=J.

And these pass frequency bands are the old 04-5636 kHz, where the high-pass filter corresponds to an additional 300 channels.
.

60-4 low-pass filter corresponds to existing 960 channels
028 kHz, and the attenuation frequency band of each filter is
Each filter passes through the other filters within a range of 1 yen. Also, 1
The other configurations in Part I are the same as those in FIGS. 1 and 2.

The above-mentioned branching filters are installed between the existing devices NM, the supergroup converters 1 and 3, and the branching device K (7), by inserting them at four locations in this case. The baseband part of each of the existing devices is connected to the low-frequency d...wavelength filter 10-2.) 1-Complete q
1-2, respectively. For these reasons, the installation time for inserting each duplexer into the system is shortened, and in particular, if the gain of each low-pass filter is set to 1, it can be used without adjustment, and each of the 960 channels of the existing line can be used separately. Operation can be resumed immediately through the low-pass filter. In other words, the service interruption time of the operating line can be shortened.

After the above configuration, work will be done to increase the line capacity of 300 channels. That is, 300 additional channels are provided by the high-pass filter 10-1 that constitutes each demultiplexer.
．． Super group conversion device that connects 11-1.12-1.13-1 and additional channel compatible group conversion/talk path conversion device C8゜9! .
-2, I7-2.12-2゜13-2, and does not affect communications during operation. Therefore, each device compatible with the additional channel is installed, regardless of the existing line, and after the adjustment is completed, the line operation of the additional channel is started.

By configuring the system by inserting and installing each device r1'' compatible with the additional channel as explained above, ■α existing devices can be replaced without being discarded! , Merge H1; Can be used. Historically, by setting the gain on the low-pass filter side of the brancher to be inserted to 1, it is possible to resume operation of the existing line without adjustment even after the brancher is inserted. This makes it possible to expect the economic effect of keeping down the cost of adding line capacity to a low level, and it can also greatly contribute to improving serviceability by shortening the time during which lines are disconnected.

In addition, since the installation and adjustment of each device that supports the additional channel can be done independently of the existing line, you are freed from the traditional time constraints of having to perform work late at night when there are few calls. Furthermore, installation and adjustment costs can be significantly reduced, and new economic effects can be expected.

It should be noted that, as a matter of course, the present invention can achieve the above objectives even if it is suitable for a system in which there is no B station, which is a branch station, and A and C stations face each other.

My father did not connect the high-pass filter of station B internally, and connected the high-pass filter of station A and station C.
Supergroup transformation device for adding 00 channels, group transformation/yJQ
If the same device as the channel switching device is installed, it is possible to add 300 channels each between stations A and 8 and between stations B and ○. In addition, as an example of increasing the line capacity (v knee), the case where 96o channels are increased to 1260 channels has been described, but the present invention can be applied to existing and additional channels without any restrictions, and can be applied to various lines. It is clear that channels can be added in frequency bands higher than the baseband frequency, and in addition to wireless lines,
It is clear that the present invention can also be applied to a stem using a transmission line.

(Effects of the Invention) As detailed above, according to the present invention, it is possible to shorten the service interruption time of existing lines, it can be used as is without making any changes to existing equipment, and it is possible to add additional channels. Equipment installation work can be carried out without affecting the existing lines, and without having to receive a contract for inter-IJ maintenance, which has a great effect on serviceability and economy. It is possible to achieve excellent effects such as fdr.
□.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of baseband frequency distribution in case of line capacity increase, Fig. 2 is a line configuration diagram of the counterfeit Nosdeno, and Fig. 3 is the existing 7 steno in Fig. 2. 1 o 81 Yaka 1 Yai, Egae. , Wow, 11. Figure □ is a line configuration diagram showing an embodiment of the present invention in which a line capacity section is added to the existing system shown in Figure 2. 1+2+3+1'+2'+3'+14+15 is a supergroup conversion device, 4, 5.6, 8, 9 is a group conversion/talk path conversion device, 7 is a branching device, 70, 17, 12, i
3 is a branching filter, 1θ-7, 11-1, 12-1, 13-1
is a high-pass filter, 10-2.11-2.12-2/13-
2t: J low-pass filter, M is a radio. Figure 1 tor Figure 2 碍 8ⅱ C荀-iノυf
4 Sui l, Figure 3 Alt 18 Noon, C station Figure 4, Puuu Dingi 1 Shi 11 scream and t+c--1---11--1--11 Incident display 1988 special Patent Application No. 062914 2 Name of the invention Method for increasing carrier telephone line capacity 3 Relationship with the case of the person making the amendment Patent application Person address (
1-7-12-12 Toranomon, Minato-ku, Tokyo 1-7-14 Agent address (105) 1-7-1 Toranomon, Minato-ku, Tokyo
No. 2 No. 5, Subject of amendment Column 6 of "Detailed Description of the Invention" in the specification, Contents of amendment Contents of amendment at the bottom of BLM (1) Page 2 of the specification, line 9, line 11, line 1] and In the 11th line of page 3, the word "exchange" is corrected to "replacement." (2) In the 12th line of page 3 of the circular, the phrase “exchange allocation (value)” is corrected to “replacement setting.”201

Claims (2)

[Claims] (1) In a carrier system that increases the capacity of a carrier telephone line by adding a call path in a frequency band higher than the existing baseband frequency, the system is configured with at least two opposing stations, and each In addition to inserting and installing a duplexer between the carrier equipment and the wireless modal tiles that make up the station, the low-pass filter side of the duplexer is connected to the existing carrier equipment, and the high-pass filter side of the duplexer is added. A carrier telephone line capacity increase method characterized by connecting to a carrier device corresponding to a call route to add a call route. (2) Special IT characterized by having a duplexer with a gain of 1
'l' A method for increasing carrier telephone line capacity according to claim (1).