JP2923960B2 - Multi-way multiplex communication equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for a multidirectional multiplex communication device for wireless communication.

〔Overview〕

The present invention relates to a multi-directional multiplex communication apparatus, comprising: dividing an upstream frame and a downstream frame into an even-numbered frame and an odd-numbered frame; assigning an initial connection channel to one of them; Thus, the use efficiency of the frame is improved.

[Conventional technology]

Conventionally, a multi-way multiplex communication device has provided an initial connection channel (hereinafter, referred to as ACQ CH) and a phase adjustment channel (hereinafter, LMT CH) in the same frame.

[Problems to be solved by the invention]

However, in such a conventional multidirectional multiplex communication device,
Since the ACQ CH and the LMT CH exist in the same frame, there is a disadvantage that the use efficiency of the frame deteriorates.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide a multi-directional multiplex communication device with high frame use efficiency.

[Means for solving the problem]

The present invention includes a master station, and one or more slave stations connected to the master station via a wireless line, wherein the master station includes first multiplexing means for multiplexing a frame synchronization pattern on a downstream frame. Each of the slave stations includes a double multiplexing unit for multiplexing bursts for initial connection and phase adjustment based on the frame synchronization pattern in an upstream frame, and the first multiplexing unit includes the two bursts. Multiplexing the initial connection position information and the phase difference information in the downlink frame based on the above, each of the slave stations includes a processing means for performing the initial connection and phase adjustment processing based on the two pieces of information, respectively. In a multiplex communication apparatus, an uplink frame and a downlink frame are divided into even-numbered frames and odd-numbered frames, one of which is assigned an initial connection channel, and the other of which is a phase adjustment channel. Assigned, the first multiplexing means includes means for multiplexing an even / odd pattern in a downstream frame, and means for multiplexing the two pieces of information on the two channels, respectively, and the second multiplexing means comprises: Means for multiplexing each of the two bursts into the two channels based on a pattern, wherein each of the slave stations separates the two pieces of information from a downstream frame based on the even and odd patterns and provides the separated information to the processing means. It is characterized by including a separating means.

[Action]

The upstream frame and the downstream frame are divided into even-numbered frames and odd-numbered frames, and one of them is assigned an initial connection channel and the other is assigned a phase adjustment channel. The first multiplexing means multiplexes the even and odd patterns corresponding to the even and odd numbers of the downstream frame, multiplexes the initial connection position information on the initial connection channel, and multiplexes the phase difference information on the phase adjustment channel. The second multiplexing unit multiplexes bursts for initial connection and position adjustment based on the even / odd pattern of the downstream frame. Each slave station separates the initial connection position information and the phase difference information from the downstream frame based on the even / odd pattern, and provides the information to the processing means. By the above operation, the channel for initial connection and the channel for phase adjustment are installed in separate even and odd frames, so that the same area of each frame can be shared by two channels, and two channels are used in the same frame. The use efficiency of the frame can be improved as compared with the conventional technology of allocating and installing at the same time.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a multidirectional multiplex communication apparatus according to an embodiment of the present invention. In FIG. 1, the multi-way multiplex communication device is:
A master station 10 and a slave station 20 connected to the master station 10 via a wireless line.
The master station 10 receives a frame synchronization pattern generation circuit 11 and a multiplexing circuit 15 as first multiplexing means for multiplexing a frame synchronization pattern on a downstream frame, and inputs an output downstream frame 1 of the multiplexing circuit 15 to control an antenna. And a modulation / demodulation circuit 16 for transmitting the data to the slave station 20 via the slave station 20.

Further, the slave station 20 receives a downstream frame of the master station 10 via an antenna and outputs a downstream frame 3;
A frame synchronization circuit 22 that outputs a frame synchronization pulse 4 based on the downstream frame 3, and an initial connection burst (hereinafter referred to as an ACQ burst) based on the frame synchronization pulse 4.
And a second multiplexing means for multiplexing a phase adjustment burst (hereinafter, referred to as an LMT burst) into an upstream frame.
It includes an ACQ burst generation circuit 26, an LMT burst generation circuit 27, and a multiplexing circuit 28 that supplies the upstream frame 6 to the modulation / demodulation circuit 21.

Further, the multiplexing circuit 15 includes means for multiplexing the initial connection position information (hereinafter, referred to as ACQ data) and the phase difference information (hereinafter, referred to as LMT data) into the downstream frame 1 based on the two bursts.

Further, the slave station 20 includes a part of the ACQ data separation processing circuit 26 and the LMT data separation processing circuit 2 as processing means for performing initial connection and phase adjustment processing based on the two pieces of information.
Includes part of 7.

Here, the feature of the present invention is that the upstream frame and the downstream frame are divided into even-numbered frames and odd-numbered frames, one is assigned an ACQ CH, and the other is an LMT CH.
The first multiplexing means includes an even / odd pattern generating circuit 12 for generating an even / odd pattern 2, a multiplexing circuit 15 for multiplexing the even / odd pattern 2 in a downstream frame, and an ACQ CH and an LMT respectively. An ACQ burst detection circuit 13 for detecting an ACQ burst and outputting ACQ data based on the even / odd pattern 2 from a downstream frame of the modulation / demodulation circuit 16 as a means for multiplexing to a CH, an LMT burst for detecting an LMT burst and outputting LMT data A detection circuit 14 and a multiplexing circuit 15 are included.

The slave station 20 also includes an even / odd pattern separation circuit 23 for separating the even / odd pulse 5 from the downstream frame 3 based on the frame synchronization pulse 4.

Further, the ACQ burst generation circuit 26 and the LMT burst generation circuit 27 include means for applying an ACQ burst and an LMT burst to the multiplexing circuit 28 based on the even-odd pulse 5, respectively. The separation means includes a part of the ACQ data separation processing circuit 24 and a part of the LMT data separation processing circuit 25 as separation means for separating the ACQ data and the LMT data from the frame and applying the separated data to the processing means.

 In this embodiment, the number of slave stations is one, but a plurality of slave stations may be used.

The operation of the multidirectional multiplex communication device having such a configuration will be described. FIG. 2 is a time chart showing the signal operation of each part of the multi-way multiplex communication apparatus of the present invention. The signals shown in FIG. 2 correspond to the timings T1 to T7 of the signals output from the respective circuits shown in FIG. 1, 1 is a downlink frame modulated by the modulation / demodulation circuit 16 of the master station 10, and 2 is that of the master station 10. Even-odd pattern generation circuit 12
, 3 is a downlink frame demodulated by the modulation / demodulation circuit 21 of the slave station 20, 4 is a frame synchronization pulse generated from the frame synchronization pattern (EP pattern) detected by the frame synchronization circuit 22, and 5 is The even-odd pulse 6 generated from the even-odd pattern separated by the even-odd pattern separation circuit 23 is modulated by the multiplexing circuit 28 and the up-frame is 7
16 shows an upstream frame demodulated.

In FIGS. 1 and 2, first, in the master station 10, a frame synchronization pattern indicating the beginning of the downlink frame 1 is generated in the slave station 20 by the frame synchronization pattern generation circuit 11, and the odd / odd indicating the even / odd of the frame is also generated. The pattern is generated by the even-odd pattern generation circuit 12. At timing T1, the multiplexing circuit 15 multiplexes the frame synchronization pattern and the even / odd pattern on the downstream frame 1 and transmits the multiplexed pattern to the slave station 20. The modulation / demodulation circuit 21 of the slave station 20 receives the downstream frame 3 at the timing T3, and the frame synchronization circuit 22 generates the frame synchronization pulse 4 at the timing T4 from the baseband signal.
Generates an even-odd pulse 5 at timing T5.

Accordingly, the slave station 20 operates the ACQ burst generation circuit 26 when performing the initial connection processing according to the frame synchronization pulse 4 and the even / odd pulse 5, and operates the LMT burst generation circuit 27 when performing the phase adjustment processing. T6
Then, the multiplexing circuit 28 multiplexes the ACQ pattern on the even-numbered frames and the LMT pattern on the odd-numbered frames in the upstream frame 6 respectively. The modulation / demodulation circuit 28 transmits the ACQ burst and the LMT burst to the master station 10.

In the master station 10, the modem 16 receives the upstream frame 6 at the timing T7, and based on the even-odd pattern generated at the timing T2, when the frame is an even-numbered frame, the ACQ burst detection circuit 13 operates, and the obtained ACQ The multiplexing circuit 15 multiplexes the data into the downstream frame 1 at the timing T1, and the LMT burst detection circuit 14 operates at the odd-numbered frame, and the multiplexing circuit 15 multiplexes the obtained LMT data into the downstream frame 1 at the timing T1. Then, the signal is transmitted to the slave station 20 by the modulation / demodulation circuit 16.

Accordingly, at timing T3, the modem 21 receives the downstream frame 1 in which the ACQ data and the LMT data are multiplexed, and also receives the frame synchronization circuit 22 from the baseband signal.
Accordingly, the frame synchronization pattern 4 is generated at the timing T4, and the even / odd pulse 5 is generated at the timing T5 by the even / odd pattern separation circuit 23. Based on these pulses, if the received downlink frame 3 is an even-numbered frame, ACQ
Data separation processing circuit 24 operates to perform initial connection processing,
In the case of the odd-numbered frame, the LMT data separation processing circuit 25 operates to perform the phase adjustment processing, and the initial connection processing and the phase adjustment processing can be alternately performed by the even-odd frame.

〔The invention's effect〕

As described above, the present invention has an excellent effect of effectively utilizing a frame.

[Brief description of the drawings]

FIG. 1 is a block diagram of a multidirectional multiplex communication apparatus according to an embodiment of the present invention. FIG. 2 is a time chart showing the signal operation of each part of the multi-way multiplex communication apparatus of the present invention. 1, 3, down-frame, 2 ... even-odd pattern, 4 ... frame synchronization pulse, 5 ... even-odd pulse, 6, 7 ... up frame, 11 ... frame synchronization pattern generation circuit, 12 ...
Even-odd pattern generation circuit, 13 ACQ burst detection circuit, 14
…… LMT burst detection circuit, 15, 28 …… Multiplexer, 16, 2
1… Modulation / demodulation circuit, 22… Frame synchronization circuit, 23… Even / odd pattern separation circuit, 24… ACQ data separation processing circuit, 25
... LMT data separation processing circuit, 26 ... ACQ burst generation circuit, 27 ... LMT burst generation circuit, T1 to T7 ... timing.

Claims (1)

(57) [Claims] A first multiplexing means for multiplexing a frame synchronization pattern on a downstream frame, comprising: a master station; and one or more slave stations connected to the master station via a radio line. Wherein each of the slave stations includes second multiplexing means for multiplexing bursts for initial connection and phase adjustment on an upstream frame based on the frame synchronization pattern, and wherein the first multiplexing means comprises Means for multiplexing initial connection position information and phase difference information in a downstream frame based on one burst, and each of the slave stations includes processing means for performing processing of initial connection and phase adjustment based on the two pieces of information. In a multi-directional multiplex communication device, an uplink frame and a downlink frame are divided into even-numbered frames and odd-numbered frames, and an initial connection channel is allocated to one of the same regions, and A channel for phase adjustment is assigned; the first multiplexing means includes means for multiplexing an even / odd pattern in a downstream frame, and means for multiplexing the two pieces of information on the two channels, respectively; The means includes means for multiplexing each of the two bursts into the two channels of the upstream frame based on the even / odd pattern extracted from the downstream frame. A multidirectional multiplex communication apparatus, comprising: a separating unit that separates the two pieces of information from the downstream frame based on the information and supplies the separated information to the processing unit.