JPH0199340A - Frequency hopping control system - Google Patents

Abstract

PURPOSE:To realize the system efficiently by supplying transmission signal from a slave station terminator, frequency hopping information and burst control information to a radio transmitter-receiver of slave station in sending a data from the slave station to the master station and allowing the radio transmitter- receiver of the slave station to apply frequency hopping control to the channel based on the information. CONSTITUTION:A transmission section 210 in a slave station radio transmitter- receiver 200 uses a reception means 10 to apply reception processing, a multiplex /demultiplex means 20 demultiplexes the multiplex signal into frequency hopping information and burst control information or the like, and the transmission signal is subject to speed conversion into the transmission speed of the radio section. On the other hand, the frequency hopping information and the burst control information are generated into a frequency hopping control signal and a burst control signal respectively by a frequency hopping control means 40 respectively, they are sent to a modulation means 50 and a burst control means 60, the modulation means 50 and the burst control means 60 are accessed to apply frequency hopping control and burst control. Thus, the system is realized efficiently.

Description

[Detailed Description of the Invention] [Summary] Regarding a frequency hopping control method used in a non-3A communication system that performs demand assignment time division multiplexing using multicarriers, the present invention relates to a frequency hopping control system that performs demand assignment time division multiplexing using multicarriers. The purpose of this is to provide a method for realizing a connection system more efficiently, and is a signal transmitted from a slave station terminal device that constitutes a slave station.

A receiving means for performing reception processing of a multiplexed signal in which frequency hopping information and burst control information consisting of time slots and carrier numbers are multiplexed, a demultiplexing means for demultiplexing the multiplexed signal, and a demultiplexing means separated from the demultiplexing means. A speed conversion means for converting a signal to a predetermined speed, a frequency hopping control means for creating a control signal for selecting a carrier based on the frequency hobbing information separated from the demultiplexing means, and an output from the speed conversion means. The transmitting unit includes a modulating means for modulating a signal with a frequency according to the control signal output from the frequency hopping control means, and burst control information that is output only when transmission of the modulated signal is requested from the modulating means. When a slave station wireless transmitter/receiver is configured and data is transmitted from a small station to a master station, a transmit signal 9 frequency hopping information and burst control information is given from the slave station terminal device in the slave station to the slave station wireless transmitter/receiver. , the slave station wireless transmitter/receiver is configured to perform frequency hopping control for the channel based on this information.

[Industrial application field]

The present invention relates to a frequency hopping control method used in a wireless communication system that performs demand assignment time division multiple access using multiple carriers.

In the multi-carrier demand assignment time division multiple access (hereinafter referred to as multi-carrier DA-TDMA) system, in order to effectively utilize all time slots (total number of channels) of all carriers, the wireless transmitting/receiving device of the slave station Frequency hopping was required to switch the carrier frequency in units of time slots.

On the other hand, demand assignment technology for single carriers has been established, and the idea of frequency hopping for multicarriers has been proposed. , it was necessary to effectively systemize both technologies.

[Conventional technology]

FIG. 5 is a block diagram illustrating a conventional example, and FIG. 6 is a diagram illustrating a connection form of a wireless communication system.

The digital data wireless communication system shown in Figure 6 connects telephone subscribers (C1) and data terminals (DTIE) (d),
A slave station (
al, and a master station (b) that relays data to and from a plurality of slave stations (a).

In addition, the slave station (al) in the figure is a multi-port type module that performs transmission path matching with multiple types of telephone subscribers (C1 and data terminals (DTB) (d), as well as data time-division multiplex connection processing, etc.). A station terminal device 1a, a single port type small station terminal device 1b that performs transmission line matching with, for example, one telephone subscriber (C) and performs data time division multiplexing/separation connection processing, etc., and a time division multiplex connection. A slave station wireless transmitter/receiver 2a that performs transmission/reception processing of processed data and exchanges with the multi-port slave station terminal device 1a, and a single port slave station terminal device that transmits/receives data subjected to time division multiple access processing. It is configured to include a slave station wireless transmitting/receiving device 2b, etc., which performs communication with 1b.

On the other hand, the master station (b) includes a master station wireless transmitter/receiver 5'' that transmits and receives data at a predetermined frequency with the slave station wireless transmitter/receiver 2a and the slave station wireless transmitter/receiver 2b that constitute the slave station (a), It is comprised of a master station terminal device 6 that performs transmission path matching with the exchange 7 and performs data time division multiplexing/separation connection processing, etc., and an exchange 7 that performs exchange processing of multiple voices and data, etc. .

In this example, data is transmitted and received using the multi-carrier I)A-TDMA system, and the slave station wireless transmitting/receiving device 2a
Data transmission from the master station wireless transmitter/receiver 5 to the uplink,
Data transmission from the master station wireless transmitting/receiving device 5 to the slave station wireless transmitting/receiving device 2b is assumed to be a downlink.

FIG. 5 shows an outline of the configuration of the slave station wireless transmitter/receiver 2a, and the conventional example shown in FIG. In this case, the transmitter 21 of the slave station wireless transmitter/receiver 2a includes the following functional blocks.

That is, receiving circuits (hereinafter referred to as RIEC) 211 and 212 that perform reception processing of multiplexed data and control information, and a modulator 21 that receives transmission data and transmits it as a wireless signal.
4, an oscillator 215 that can change the oscillation frequency based on the frequency hopping information received and processed by the RHC 212, and an amplifier 216 that amplifies the output of the modulator 214 to a predetermined power.
and transmits the output of the amplifier 216 only when there is a control signal (burst timing signal) from the REC 212.
A burst control switch circuit 217 is provided.

Slave station wireless transmitting/receiving device 2a and multi-port slave station terminal device 1a
The frame synchronization signal F and control information, which form the interface signal with the radio station, are transmitted through the route (f), and the transmission signal (wireless section bit rate portion) is transmitted through the route (e).

Note that when the above-mentioned interface signal is in a single carrier format, it is sent out on one carrier, and in the case of a multicarrier, the single carrier format is configured for the number of carriers.

Furthermore, the transmission signal has time slots for carrying channels, and it is possible to carry, for example, 96 channels.

Information such as the allocation of communication channels (for example, 96 channels are transmitted in this example) to time slots for each carrier is provided by the time slot TS of each carrier.
It is transmitted on O.

The frame synchronization signal F transmitted through the route (f) is (e
The control information includes frequency hopping information consisting of a time slot for frequency hopping and a carrier number, burst control information, etc.

In the REC 212, through the reception processing of this control information, the frame synchronization signal F is transmitted to the REC 211 and synchronized with the frame, and the frequency hopping information is transmitted to the oscillator 215 as a frequency hopping control signal to switch the carrier frequency based on the specified time slot and carrier number. control the oscillation frequency of the oscillator 215.

On the other hand, parse by receiving burst control information)-J
The Jt control signal is sent as a transmission request to the burst control switch circuit 217, and the transmission data is converted into a wireless signal via the burst control switch circuit 217 to the master station (shown in FIG. 6).
b).

[Problem that the invention seeks to solve]

In the conventional example described above, it is necessary to separately provide a transmission path (fl) for control information, and it is therefore necessary to perform synchronization processing between the transmission signal and the control information signal more precisely.

An object of the present invention is to provide a method for more efficiently realizing a system that performs demand assignment time division multiple access using multicarriers.

[Means for solving problems]

FIG. 1 shows a block diagram illustrating the invention in detail.

The principle block diagram of the present invention shown in FIG. 1 shows functional blocks of the transmitter 210 in the wooden horse radio transmitter/receiver device 200, which has basically the same functions as those explained in the fifth child diagram.

10 in this functional block is a reception unit that performs reception processing of a multiplexed signal in which a transmission signal from a slave station terminal device constituting a slave station, frequency hopping information consisting of a time slot and carrier number, and burst control information are multiplexed. 20 is a demultiplexing means for performing separation processing on this multiplexed signal; 30 is a speed converting means for converting the transmission signal separated by the demultiplexing means 20 to a predetermined speed; and 40 is a demultiplexing means. 50 is a frequency hopping control means for creating a control signal for selecting a carrier based on the frequency hopping information separated from the frequency hopping information 20; 60 is a burst control means that sends out a modulated signal when it is requested to send out a modulated signal from the modulation means 50, and by providing these, it is possible to solve this problem. do.

[For production]

The signal transmitted from the slave station terminal device to the slave station wireless transmitting/receiving device 200 is a multiplexed signal in which a transmission signal, frequency hopping information consisting of a time slot and carrier number, and burst control information are multiplexed.

In the transmitting unit 210 in the slave station wireless transmitting/receiving device 200, the receiving means 10 performs reception processing, and the multiplexed signal is transmitted as the transmitting signal 1.
The signal is separated into frequency hopping information, burst control information, etc. by the demultiplexer 20, and the transmission signal is speed-converted to the transmission speed of the wireless section.

On the other hand, frequency hopping information and burst control information are created as a frequency hopping control signal and a burst control signal, respectively, by frequency hopping control means 40 and sent to modulation means 50 and burst control means 60. By configuring the system to access and perform frequency hopping control and burst control, it becomes possible to more efficiently realize a system that performs demand assignment time division multiple access using multicarriers.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 2 to 4.

FIG. 2 is a block diagram explaining the present invention in detail, FIG. 3 is a diagram explaining the radio section frame format in an embodiment of the present invention, and FIG. 4 shows a slave station terminal device and a slave station in an embodiment of the present invention. Figures illustrating interface signal formats between wireless transmitting and receiving devices are shown. Note that the same reference numerals indicate the same objects throughout the figures.

The embodiment of the present invention shown in FIG. 2 is based on the receiving means 10 described in FIG. Speed conversion means 30. Modulation means 50. 1Hc211.1Hc211, which has the same function as the burst control means 60 explained in FIG. sP C0NV213. Modulator 214.
A burst w control switch circuit 217, a frame synchronization circuit (hereinafter referred to as F5YNC) 218 that detects a frame synchronization signal F from the output of the REC 211 as a demultiplexing means 20 and sends out a timing signal;
A demultiplexing circuit (hereinafter referred to as D) that demultiplexes the output of EC211
A demultiplexing unit 20a1 consisting of 219 (referred to as MIX)
In this example, the frequency hopping control means 40 is composed of a frequency hopping control circuit (hereinafter referred to as FHCNTL) 300.

In addition to the above, the oscillator 215 and amplifier 216 described in FIG. 5 are also provided.

FIG. 3 shows data frames exchanged in the wireless section of this embodiment. In this example, 4 multicarrier DMA
It shows the frame format of each carrier number, 1~
The first time slot TSO of No. 4 is shown in Fig. 3 (B
), control information CNTL, frame synchronization pattern F, etc. are loaded, and the subsequent time slots TSI to TS
24 carries a communication channel.

In addition, in this embodiment, there are 96 call channels #l to #96, and carrier No. 1 corresponds to call channels #1 to #24,
Similarly, carrier No. 2 to No. 4 is call channel #2
5 to #483 communication channels #49 to #721 communication channels #73 to #96 are divided and carried.

Note that the symbol G in the figure is a guard bit, and the carrier No.
, 2 to No., and 4 are not particularly defined in the downlink, and in the uplink are information indicating a transmission prohibited time period.

On the other hand, from the slave station terminal device 1a to the slave station wireless transmitting/receiving device 200
As shown in FIG. 4, the format of the signal transmitted to (however, the signal corresponding to the downlink) is different before the speed conversion performed by the SP CONV 213 (1) and after the speed conversion (2).

That is, before speed conversion (1), a frame synchronization signal F and frequency hopping information (hereinafter referred to as FHvI information) are added to the front of the data frame exchanged in the wireless section, and this information is transmitted to the slave station wireless transmitter/receiver. 200 internal transmitter 21
0a, and the wireless signal is in the frame format shown in Figure 3! - is sent.

The frame synchronization signal F before speed conversion (1) shown in FIG. 4 is detected by the F5YNC 218 and sends out a processing timing signal for the DMUX 219 and a processing timing signal for the FHCNTL 300.

The D MUX 219 separates the multiplexed signal received and processed by the REC 211 into FH information, burst control information and transmission signals, and the FIIJrr1 report and burst control information are sent to the FHC.
To the NTL 300, the transmission signal is sent to the SP CONV 213, speed-converted to the speed of the wireless section, and output to the modulator 214.

Fl (CNTL300 recognizes the time slot and channel number for frequency hopping from the FH information, and
-215 oscillation frequency, and the oscillation frequency signal is used to switch the carrier frequency of the relevant time slot in the transmission signal input to the modulator 214, and the amplifier 216
The signal is sent to the burst control switch circuit 217 via the burst control switch circuit 217.

On the other hand, the Fll CNTL 300 transmits the current time slot at the timing when the carrier number and time slot specified for transmission are sent to the burst control switch circuit 217 based on the burst control information.

As shown above, by mixing control information such as Flr information with transmission signals and multiplexing them, the control information and transmission signals do not need to be transmitted on separate transmission paths, and the transmission medium (cable, etc.)
It is possible to reduce mechanical parts such as connectors.

〔Effect of the invention〕

According to the present invention as described above, it is possible to realize a multi-carrier A-TDMA system that is efficient in processing and has a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram explaining the present invention in detail, FIG. 3 is a diagram explaining the wireless section frame format in an embodiment of the present invention, and FIG. 5 is a block diagram illustrating the conventional example, and FIG. 6 is a diagram illustrating the connection form of the wireless communication system. The figures for explanation and are shown respectively. In the figure, 1a is a multi-port slave station terminal device, 1b is a single-port slave station terminal device, 2a, 2b,
200 is a slave station wireless transmitting/receiving device, 5 is a master station wireless transmitting/receiving device, 6 is a master station terminating device, 7 is an exchange, 10 is a receiving means, 20 is a demultiplexing means, 20a is a demultiplexing unit, 21, 210, and 210a are a demultiplexing unit. Transmission section, 22
30 is a receiving section, 30 is a speed conversion means, 40 is a frequency hopping control means, 50 is a modulation means, 60 is a burst control means, 21
1.212 is REC, 213 is SP CONV. 214 is a modulator, 215 is an oscillator, 216 is an amplifier, 217 is a burst control switch circuit, 218 is F5YNC, and 219 is D MUX. 300 is FHCNTL. are shown respectively. Reed tI53

Claims (1)

[Scope of Claims] A wireless communication system comprising a master station and a plurality of slave stations, and transmitting time-division multiplexed data exchanged between the master station and the slave stations over a plurality of carriers, the system comprising: Receiving means (10) that performs reception processing of a multiplexed signal in which a transmission signal from a slave station terminal device constituting a slave station, frequency hopping information consisting of a time slot and carrier number, and burst control information are multiplexed; a speed converting means (30) for converting the signal separated from the multiplexing/demultiplexing means (20) to a predetermined speed; a frequency hopping control means (40) that creates a control signal for selecting a carrier based on the frequency hopping information; and an output signal from the speed conversion means (30) that is output from the frequency hopping control means (40). a transmitting unit (50) that modulates the frequency according to the control signal; and a burst control unit (60) that outputs the modulated signal only when the modulating signal is requested to be transmitted from the modulating unit (50).
When transmitting data from the small station to the master station, the slave station wireless transmitting/receiving apparatus (200) is configured to include
A frequency hopping control method characterized in that a transmission signal, frequency hopping information, and burst control information are provided to a channel 0), and the slave station radio transmitting/receiving device (200) performs frequency hopping control for the channel based on these information.