JPH01103336A - Delay adjustment system - Google Patents

Abstract

PURPOSE:To simplify the constitution by dividing a relay station into an adjustment station and a station to be adjusted, and allowing a base station to indicate the delay adjustment processing and to command the correction of a collected correction quantity to the station to be adjusted so as to relieve part of the functions of the relay station. CONSTITUTION:The base station 10 sets a terminal station 30 into an adjusted station and the relay station 20 into the adjusting station to command the delay adjustment processing. The terminal station 30 sends a prescribed data pattern to the relay station 20 in the timing loaded in the delay counter of the delay adjustment control section 34. A delay adjustment control section 220 of the relay station 20 detects a deviation of a received pattern and multiplexes the detected information together with the main signal data and sends the result to the base station 10. The base station 10 sends a delay correction to the terminal station 30, which corrects the timing of the transmission mode via a correction section of the control section 34. Thus, it is possible to eliminate part of the functions of the relay station and the constitution is simplified.

Description

[Detailed Description of the Invention] (Summary) This invention relates to a digital data wireless communication system in which one frequency is time-division multiple accessed, and in particular relates to a delay adjustment method for adjusting a shift in uplink data transmission timing. The purpose of this system is to realize a delay adjustment method that can reduce power consumption in a simple configuration, and to transmit signals between a given relay station, including the base station and terminal station that make up the system, to multiple other relay stations. In a digital wireless communication system that performs multi-stage relay via a relay station, the relay station includes a correction unit that corrects the amount of shift in the transmission timing of uplink signals to the base station using correction values received from the base station, and Delay adjustment comprising a multiplexing processing unit that performs multiplexing processing with signals, and a delay amount detection unit that detects how much the transmission timing of uplink signals deviates from a predetermined delay value according to instructions from a base station. The base station sets the first relay station, which is equipped with a control unit and is higher-ranking with respect to the base station, as a coordination station, and instructs the coordination station to detect the amount of shift in the transmission timing of the uplink signal using the delay amount detection unit. let me,
The detected amount of deviation is multiplexed with the main signal and transmitted to the base station, and the base station sets the second relay station that is subordinate to the base station as the station to be adjusted, and multiplexes the detected amount of deviation with the main signal and transmits it to the base station. It is configured to correct the amount of shift in the transmission timing of the upstream signal that is transmitted to the correction unit and relayed via the correction unit.

[Industrial Application Field] The present invention relates to a digital data wireless communication system that performs time division multiple access on one frequency, and particularly relates to a delay adjustment method for adjusting a shift in uplink data transmission timing.

For example, when installing a telephone line for a small number of subscribers in a remote area of vast land, in order to save the cost and time of laying cables, it is necessary to A digital data wireless communication system has been put into practical use in which a relay station accommodates a plurality of terminal stations and a base station accommodates a plurality of relay stations, converts received data, and connects to a telephone station via wire.

When there are multiple relay stations and multiple terminal stations under the control of this base station, and data transmission between these stations is performed using a system that connects one frequency in time division multiple access (hereinafter referred to as a TDMA system) There are many.

Each station constituting such a TDMA system, particularly relay stations and terminal stations, is required to be configured more simply with low power consumption.

[Conventional technology]

FIG. 4 is a block diagram explaining the conventional example, FIG. 5 is a diagram explaining the configuration of the signal combining and transmitting processing section in the conventional example, and FIG.
The figure is a block diagram explaining the configuration of a conventional delay adjustment processing unit, FIG. 7 is a diagram explaining the frame format of data in the wireless section, and FIG. 8 is a diagram explaining the configuration of a digital data wireless communication system in the wireless section. Figures are shown respectively.

FIG. 4 and FIG. 8 show the configuration of a TDMA digital wireless communication system, in which each terminal station 3 (i.e.
) and relay stations 2(1) to 2(12) (usually consisting of 12 relay stations), converts the speed and format of the voice to be transferred to the PCM highway (a), and also transfers the voice to the PCM highway (a). A base station 1 that sends the transmitted voice to each terminal station 3(i) and relay stations 2(1) to 2(12), and a base station 1 that sends the transmitted voice to each terminal station 3(i) and relay stations 2(1) to 2(12), Relay station 2 (1) ~ which accommodates and relays up to 12 stages
2 (12), a plurality of terminal stations 3 (i) located at the final rung of the digital wireless communication system and accommodating a plurality of telephone subscribers, and voice exchanged from the base station 1 via the PCM highway (a). It is comprised of a concentrator 40 that converts the telephone numbers into a two-line (2W) line (b) and accommodates them in an exchange 50, and an exchange 50 that accommodates a plurality of telephone subscribers.

The central processing unit 11 (hereinafter referred to as CPU) of the base station 1 can specify an internal processing job routine by operating a terminal (not shown) connected to the concentrator 40.

FIG. 8 shows base station 1. An overview of the configuration of a wireless section consisting of relay stations 2(1) to 2(12) and terminal station 3(i) is shown, and relay stations 2(1) to 2(12) and terminal station 3(i) all have the same configuration. Suppose then.

The base station 1 in the figure has a CPt1ll that controls internal operations based on a predetermined program, and a TD? A transceiver (hereinafter referred to as T) that transmits and receives data at fA
(referred to as RX) 12, a speed/format converter 13 that converts data transmitted via the PCM Hanway (a) into a TDMA format and speed, and each of a plurality of pieces of transmission data to be transmitted to the downlink. A transmission control unit (hereinafter referred to as DTX) 14 that inserts a preamble (a string of information inserted at the beginning of the transmission data for the purpose of synchronization) and a timeslot synchronization pattern into and multiplexes the data into the timeslot TS; The reception control unit extracts and plays the received data transferred from the uplink.
The relay station 2(i) in the figure is equipped with a TRX 21.22 that exchanges data with the upper and lower stations, and controls the reception of downlink and uplink data. downlink and uplink reception control units (hereinafter referred to as DRX and ORX) 23a and 23b, and downlink and uplink transmission control units (hereinafter referred to as DTX and UTX) that control the transmission of downlink and uplink data. 24a, 24b, and a delay for checking the time slot sending timing deviation based on the transmission data from the terminal station 3(i) or the lower relay station, and adjusting the time slot sending timing deviation within the local station based on instructions from the upper station. Adjustment control unit (hereinafter referred to as DL C0
NT) 25, a control unit (hereinafter referred to as CONT) 26 that controls processing operations within the station, and an interface unit (hereinafter referred to as INTF) 27 that interfaces with telephone subscription terminals, data terminals, etc. Correction amount sending unit 28 that sends the delay correction amount to the lower station
The terminal station 3(i) in the figure is a TRX31. DTX32. υTX35. INTF
36, C0NT34, which controls processing operations within the station, and DL, which adjusts the deviation in time slot transmission timing within its own station based on instructions from relay station 2(i), which is the upper station.
C0NT34.

Furthermore, DTX24a and DL at relay station 2(i)
C0NT25 has a configuration as shown in FIGS. 5 and 6.

That is, when the DTX 24a transfers downlink data in the frame format shown in FIG. 7(B), a 16-bit preamble from the preamble section 241 and a time slot (TS
) The 16-bit synchronization pattern (SYNC) from the synchronization pattern section 242 and the delay correction amount from the correction amount sending section 28 are inserted, and the multiplexing section (hereinafter referred to as MUX) 243 multiplex with

The frame format shown in Figure 7 is 700Kb.
An example of the case of ps is shown, and the symbol G indicates each time slot TS.
This is a guard area that takes into account timing deviations between O and TS18, and deviations within the guard area are covered.

The timing of this multiplexing is determined by the MUX timing control unit 25.
This multiplexed data is converted into a random pattern by a scrambler 244 and transmitted via the TRX 22.

Note that the processing timing of the scrambling section 244 is also controlled by a timing signal from the timing control section 245.

Also, DL C0NT25 shown in FIG. 6 is delay counter 2.
51a+adder 251b, -order delay low amount setting section 251c, and register 251d; correction section 251; preamble section 252a; SYNC section 252b; 10 setting section 252c; MUX 252d; register 252e; processing unit 252 and delay 5YNC detection unit 253a
, IO controller section 253b.

The delay amount detection unit 253 includes a shift detection unit 253c, a register 253d, a timing generator 253e, and a register 253f.

Note that the DL C0NT34 constituting the terminal station 3(i) has a configuration in which the delay amount detection section 253 in the DL C0NT25 is removed.

Multiplexing processing unit 25 in DL C0NT34 of terminal station 3(i)
2 forms the format shown in FIG. 7 using MIIX 252d.

At this time, the self-station identification information 10 is preset and sent from the 10 setting section 252c, inserted into the format, and each TSO to TS17 is set at the timing and speed sent from the AliX timing generator 252f. Send.

Note that the MIX timing generator 252f stores the timing cycle set from C0NT33 in the register 252e, and transmits it to the MIIX timing generator 252.
By loading f, timing at a predetermined speed is sent out.

Also, the data formed by MUX252d is UTX35
The timing is determined based on the timing from the delay counter 25ja, and the signal is transmitted to the upper station (relay station 2 (12) in the case of FIG. 8).

The set value of the delay counter 251a is determined by setting a rough delay amount in a primary delay amount setting section 251C, which is made up of a dip switch, etc., and then setting a correction amount ( For example, register 251d set to ±128 bits)
The adder 251b adds the outputs from the delay counter 251a to the set value of the delay counter 251a.

Relay station 2 (12), which is an upper station of terminal station 3 (i), uses delay 5YNC detection section 25 in delay amount detection section 253 inside it.
3a detects the data transmission timing from the terminal station 3(i). Note that this is detected based on the timing from the timing generator 253e.

The 10 check unit 253b checks 10 based on the information output from the register 253f from the detected data, and detects timing deviation based on the timing from the timing generator 253e.

This deviation amount and the checked value 10 are sent to the C0NT 26 via the register 253d. Based on the amount of deviation and the 10 information, the C0NT 26 transmits the delay correction amount to the terminal station 3(i) corresponding to 10.

The terminal station 3 (1) converts this into the delay counter 25 in the correction section 251.
1a, corrects the value of delay counter 251a, and terminal station 3
Correct the data sending timing from (i).

The above example describes delay correction between terminal station 3 (i) and relay station 2 (12), but relay station 2 (11), which is the upper station of relay station 2 (12), and relay station 2 Similar corrections are made in (12) and the like.

[Problem that the invention seeks to solve]

As mentioned above, the DL C of relay stations 2(1) to 2(12)
In 0NT25, a register 253f for setting 10 information of a lower station, which is a function as an upper station, a 10 check section 253b for checking 10, and a correction amount sending section 28 are respectively configured. Since a correction section 251 and a multi-electrification processing section 252, each having a function as a power source, are installed, there are problems such as an increase in the size of the configuration and an increase in power consumption.

The present invention eliminates the 10 information set function and 10 information check function for identifying lower-order stations, which are functions of a relay station as a higher-order station, and detects and corrects the correction amount of uplink signals based on instructions from the base station. The present invention aims to realize a delay adjustment method that can reduce power consumption by simplifying the configuration of a relay station.

[Means for solving problems]

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

Reference numeral 251 in the block diagram of the principle of the present invention shown in FIG. 1 is a correction unit in the relay station 20(i) that corrects the amount of shift in the transmission timing of the uplink signal to the base station using the correction value received from the base station. 252 is a multiplexing processing unit that multiplexes uplink signals sent to the base station with signals other than the main signal, and 253 is a multiplexing processing unit that multiplexes uplink signals sent to the base station with signals other than the main signal. 220 is a delay amount detection unit that detects whether the correction unit 251. Multiplexing processing unit 2
52 and a delay amount detection section 253, and is a means for solving this problem by providing such functional blocks.

(Operation) The base station sets the first relay station 20(i), which is superior to the base station that performs the center function of the digital wireless communication system, as a coordination station, and instructs this coordination station to reduce internal delay. The amount detecting section 253 detects the amount of shift in the transmission timing of the uplink signal, multiplexes the detected amount of shift with the main signal, and transmits it to the base station.

Next, the base station sets the second relay station 20(i), which is subordinate to the base station, as a station to be adjusted, and transmits the amount of deviation received from the station to be adjusted to the internal correction unit 251. However, by configuring to correct the amount of shift in the transmission timing of the uplink signal relayed via the correction unit 251,
In the relay station 20(i), the delay adjustment control unit 220 can remove a part of the functions of the upper station, so that it can have a simpler configuration and lower power consumption.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 1 to 3. ''Figure 2 is a block diagram explaining the present invention in detail, and Figure 3 is a diagram explaining the configuration of DL C0NT in an embodiment of the present invention.The same reference numerals throughout the figures indicate the same objects. show.

The base station 10 shown in FIG. 2 is composed of the same functional blocks as the base station 1 explained in FIG. 4, except that a CPU 16 is installed which has an additional job routine for correcting the amount of delay as a program. .

Relay station 20(i) and terminal station 30(i) in this embodiment
The digital wireless communication system consisting of the following is assumed to have the same configuration as shown in FIG. Therefore, the base station l shown in FIG. 8 is the base station 10, and the relay stations 2(1) to 2(12) are the relay stations 20.
(1) to 20 (12), terminal station 3(i) is
).

The relay station 20(i) of this embodiment differs from the one described in FIG.
0NT220 is configured as shown in FIG. 3, and the terminal station 30(i) has the same contents.

For example, when a delay adjustment process and designation of the adjusted station and the adjustment station are performed by operating a terminal (not shown) connected to the concentrator station, the CPU 16 in the base station IO executes a job routine for correcting the amount of delay. , based on this job routine, instructs the adjusted station and the adjusting station to perform delay adjustment processing.

At this time, the adjusted station is terminal station 30(i), and the adjustment station is relay station 2.
0 (12), this instruction instructs relay station 20 (12) to transmit timing detection mode to C0NT 210 and DL C0NT 220, and terminal station 30 (i
) indicates the transmission timing pattern transmission mode for C0NT33.

As a result, the DL C0NT 34 internal multiplexing processing unit 252 of the terminal station 30(i) sends the predetermined data pattern to the relay station 20(12) at the timing loaded into the delay counter 251a.

In the relay station 20 (12), this data pattern is detected by the DL C0NT 220.

Note that the delay M output unit 2 in the DL C0NT220 of this embodiment
23 is a configuration in which the ■0 check section 253b and a part of the register 253f (that is, the register 253g from which the functional part for storing the ID has been deleted) explained in FIG. Information is in register 25
2g, and thereby the preamble section 252a
, 5YNC section 2523b, and is sent to the base station IO via the UTX 24b and TRX 21.

Based on this, the base station IO sends the delay correction amount to the terminal station 30(i), and the terminal station 30(i) adjusts the timing of the sending timing pattern sending mode to the internal DLCONT.
It is corrected via the correction unit 251 of 34.

As described above, the base station 10 separates the adjustment station and the adjusted station into the correction adjustment of the delay amount, instructs each of them, collects the delay correction amount, and corrects the collected delay correction amount to the adjusted station. By instructing the stations, the configuration of the relay stations 20(1) to 20(12) can be made simpler.

〔Effect of the invention〕

According to the present invention as described above, it is possible to provide a delay adjustment method that can process a plurality of relay stations that detect and relay uplink data transmission timing in a digital data wireless communication system with a simpler 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 configuration of DL C0NT in an embodiment of the present invention, and FIG. is a block diagram explaining the conventional example, FIG. 5 is a diagram explaining the configuration of the signal synthesis and transmission processing section in the conventional example, FIG. 6 is a block diagram explaining the configuration of the delay adjustment processing section in the conventional example, and FIG. 8 is a diagram explaining the frame format of data in the wireless section, and FIG. 8 is a diagram explaining the configuration of the digital data wireless communication system in the wireless section. In the figure, 1.10 is the base station, 2(1) to 2(12), 2(i), 20(1) to 20(
12) and 20(i) are relay stations, 3(i) and 30(i) are terminal stations, and 11 is a CPU. 12.21.22.31 is TRX. 13 is speed/format converter, 14.24a is DTX, 15, 23b is U
RX. 23a, 32 are DRX, 24b, 3
5 is UTX. 25.34.220 is DL C0NT, 26.3
3,210 is C0NT, 27.36 is INTF,
28 is a correction amount sending unit, 40 is a concentration station, 5
0 is a switch, 4#253 is a delay amount detection section, 241.252a is a preamble section, 242 is a TS synchronization pattern section, 244 is a scramble section, 245 is a MUX timing control section, 251 is a correction section, 251a is a delay counter, 2
51b is an adder, 251c is a primary delay amount setting unit, 251d, 251e, 252g, 253d,
253f and 253g are registers, 252 is a multiplexing processing unit, 252b is a 5YNC unit, 252c is an IO setting unit, 252d is a MUX, 252f is a MUX timing generator, 253a is a delay 5YNC detection unit, 253b is a 10 check unit, and 253c is a deviation detection unit. Department,
253e represents a timing generator; A detailed block diagram of the present invention is shown in FIG. 1. rB+ Noah diagram

Claims (1)

[Claims] Predetermined relay stations (20 (i
))) is transmitted to and from other relay stations (20(
In the case of multi-stage relaying via time division multiple access, in a digital wireless communication system that relays via time division multiple access, the relay station (20(i)) uses the correction value received from the base station to transmit uplink information to the base station. A correction unit (251) that corrects the amount of shift in signal transmission timing; a multiplexing unit (252) that multiplexes an uplink signal for the base station with a signal other than the main signal; A delay amount detection unit (2) detects how much the transmission timing of the upstream signal deviates from a predefined delay value.
a delay adjustment control unit (220) comprising a first relay station (20(i
)) is set as a coordination station, instructs the coordination station to detect the amount of shift in the transmission timing of the uplink signal in the delay amount detection section (253), and multiplexes the detected amount of shift. A processing unit (252) multiplexes the signal together with the main signal and transmits it to the base station, and transmits it to the second relay station (20(i)) which is subordinate to the base station.
)) is set as a station to be adjusted, transmits the received deviation amount to the correction unit (251) in the station to be adjusted, and adjusts the transmission timing deviation of the uplink signal relayed via the correction unit (251). A delay adjustment method characterized by correcting the amount.