JPH10126333A - Frame timing synchronization establishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame timing synchronization establishing equipment by which a frame timing between an electric communication line installation and a radio base station is simultaneously kept, so as to conduct establishment of synchronization. SOLUTION: When a network side frame timing extracted by a network side frame timing extract section 11 is given to a network side counter 14, a frame period is counted by using an internal operation clock and network side count data, synchronously with the network side frame timing are outputted. The network side count data and a base station side frame timing extracted by a base station side frame timing extract section 13 are given to a phase difference detection control section 15, where a phase difference is detected and outputted as phase difference information. When the phase difference information is given to an actual operation counter 16, the frame period actually operated is counted by using the internal operation clock, and the actual operation counter data synchronously with the phase difference information are outputted. The actual operation count data are given to an actual operation frame-timing generating section 17, in which the actual operation frame timing is generated from the actual operation count data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame timing synchronization establishing apparatus, and more particularly to a frame timing synchronization establishing apparatus for establishing frame timing synchronization with a telecommunication line equipment and a radio base station.

[0002]

2. Description of the Related Art In mobile communication, since a large number of users share the same frequency band and communicate with each other, the same frequency is shared by each user so that each set of communications does not interfere with each other. TDMA (Time Division Multiple A)
ccess: time division multiplexing) has been widely put into practical use. Also, P
In S (Personal Station), TDD (Time Division Dupl) which alternately performs transmission and reception temporally on the same carrier.
exing: time-division bidirectional) transmission. With such a TDMA-TDD system, a given frequency band is used efficiently.

In recent years, the number of users has increased, and the number of users has become insufficient. As a result, interference with other stations, communication failure, and the like have occurred, and communication quality and service have been degraded. One solution is to establish synchronization of frame timing between a plurality of radio base stations installed in the same area.

FIG. 10 is a diagram showing a slot arrangement of a TDMA-TDD frame, in which synchronization of frame timings of the radio base stations 1 and 2 has been established. The radio base stations 1 and 2 use the same frequency, and transmission slots and reception slots are multiplexed with T1 to T4 and R1 to R4 by 4 channels in one frame of 5 ms.

The PS 1a receives transmission data from the radio base station 1 in the slot time of the transmission slot T2, and transmits transmission data to the radio base station 1 to the reception slot R2. Other slots are IDLE.

Therefore, since T2 and R2 are used between the radio base station 1 and the PS1a, the PS2a can be received by the vacant T1, T3 and T4 of the radio base station 2,
It is possible to transmit to vacant R1, R3 and R4. That is, the PS 2a receives the transmission data from the wireless base station 2 in one of the transmission slots T1, T3, and T4. The PS 2a can transmit data to be transmitted to the radio base station 2 to any of the reception slots R1, R3, and R4.

FIG. 11 is a diagram showing a slot arrangement of a TDMA-TDD frame, in which synchronization of frame timings of the radio base stations 1 and 2 has not been established.

The PS1a receives the transmission slot T2 from the radio base station 1 at this time, as in FIG. 10, and transmits it to the reception slot R2 of the radio base station 1. However, the frame of the wireless base station 2 is longer than the frame of the wireless base station 1 by t.
The slots T2 and R2 of the wireless base station 1 currently communicating with the PS1a extend over T1 and T2 and R1 and R2 of the wireless base station 2 by the shift.

Since the radio base station 1 and the radio base station 2 use the same frequency, T1 and T2 of the radio base station 2 are P
Reception is disabled in S2a, and transmission of R1 and R2 is disabled in PS2a. That is, since the synchronization of the frame timings of the radio base stations 1 and 2 has not been established,
Available slots will be reduced.

As described above, unless the frame timing synchronization between the radio base stations is established, the number of usable slots decreases, and the frequency utilization efficiency decreases. Therefore, it is necessary to establish the synchronization of the frame timing between the radio base stations for effective use of the frequency.

FIG. 12 is a schematic configuration diagram of a conventional radio base station for establishing frame timing synchronization. The slave radio base station 100 performs communication between the telecommunication line equipment 20 and the master radio base station 30a. The frame timing extracting unit 101 extracts a frame timing from the telecommunication line equipment 20. The bit synchronization establishing unit 102
The bit synchronization of data transmitted and received between the telecommunication line equipment 20 and the slave radio base station 100 is established, and an internal operation clock is generated. Wireless signal transmission / reception control unit 103
Performs transmission / reception control of a radio signal with the master radio base station 30a, and extracts frame timing on the master radio base station 30a side. Frame timing generation control unit 104
Generates a frame timing actually operated by the slave radio base station 100 based on the frame timing from the telecommunication line equipment 20 or the frame timing from the master radio base station 30a.

Next, the operation will be described. After the slave radio base station 100 extracts the frame timing of the telecommunication line equipment 20 by the frame timing extraction unit 101, the frame timing generation control unit 104 synchronizes the frame timing. Then, the bit synchronization establishing unit 10
In step 2, bit synchronization is established, and data transmission with the telecommunication line equipment 20 is performed. Then, the wireless signal transmission / reception control unit 103 receives the wireless signal of the master wireless base station 30a and extracts the frame timing. After that, the frame timing generation control unit 104 synchronizes the frame timing from the master radio base station 30a as the actually operated frame timing.

[0013]

However, in the above-described prior art, only the frame timing of either the telecommunication line equipment 20 or the master radio base station 30a can be held. Therefore, once the timing is adjusted to the frame timing of the master radio base station 30a,
When the master radio base station 30a goes down or when it is necessary to switch over due to the system configuration, there is a problem that it is necessary to re-recognize the frame timing of the telecommunication line equipment 20 again.

Furthermore, in order to establish frame timing synchronization using the transmission clock of the telecommunication line equipment 20 as the minimum unit, errors in frame timing (transmission clock ±
1 clock).

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a frame timing synchronization establishing apparatus for establishing frame timing synchronization while simultaneously holding the frame timings of the telecommunication line equipment and the radio base station. The purpose is to provide.

Still another object of the present invention is to provide a frame timing synchronization establishing apparatus for establishing frame timing synchronization by reducing an error in frame timing.

[0017]

According to the present invention, there is provided an apparatus for establishing frame timing synchronization as shown in FIG. The network-side frame timing extracting unit 11 extracts a network-side frame timing, which is a frame timing on the telecommunication line facility 20 side, from communication data received from the telecommunication line facility 20. The internal operation clock generation controller 12 extracts a transmission clock from communication data, establishes bit synchronization, and generates an internal operation clock. The base station-side frame timing extraction unit 13 extracts the radio base station 30 from the radio data received from the radio base station 30.
The base station-side frame timing, which is the side frame timing, is extracted. The network-side counter 14 counts the frame period using the internal operation clock, and outputs network-side count data synchronized with the network-side frame timing. The phase difference detection control unit 15 detects a phase difference between the network-side count data and the base station-side frame timing, and outputs phase difference information. The actual operation counter 16 counts the frame period using the internal operation clock, and outputs actual operation count data synchronized with the phase difference information. The actual operation frame timing generator 17 generates an actual operation frame timing from the actual operation count data.

Here, the network side frame timing extracting unit 1
When the network side frame timing extracted in step 1 is input to the network side counter 14, the frame period is counted using the internal operation clock, and network side count data synchronized with the network side frame timing is output. The network-side count data and the base station-side frame timing extracted by the base station-side frame timing extraction unit 13 are input to the phase difference detection control unit 15, where the phase difference is detected and output as phase difference information. When the phase difference information is input to the actual operation counter 16, the frame period actually operated using the internal operation clock is counted, and the actual operation count data synchronized with the phase difference information is output. The actual operation count data is stored in the actual operation frame timing generator 1
7, the actual operation frame timing is generated from the actual operation count data.

Further, there is provided a frame timing synchronization establishing apparatus as shown in FIG. The network-side frame timing extracting unit 11 extracts a network-side frame timing, which is a frame timing on the telecommunication line facility 20 side, from communication data received from the telecommunication line facility 20. The internal operation clock generation controller 12 extracts a transmission clock from communication data, establishes bit synchronization, and generates an internal operation clock. The base station side frame timing extraction unit 13
The base station-side frame timing, which is the frame timing on the wireless base station 30 side, is extracted from the wireless data received from the wireless base station 30. The network-side counter 14 counts the frame period using the internal operation clock, and outputs network-side count data synchronized with the network-side frame timing. The base station counter 16a counts the frame period using the internal operation clock, and outputs base station count data synchronized with the base station frame timing.
The count data selection control unit 17a selects either the network-side count data or the base station-side count data. The actual operation frame timing generator 17 generates an actual operation frame timing from the network-side count data or the base station-side count data selected by the count data selection controller 17a.

Here, the network side frame timing extraction unit 1
When the network side frame timing extracted in step 1 is input to the network side counter 14, the frame period is counted using the internal operation clock, and network side count data synchronized with the network side frame timing is output. When the base station-side frame timing extracted by the base station-side frame timing extracting unit 13 is input to the base station-side counter 16a, the frame period is counted using the internal operation clock, and the base station synchronized with the base station-side frame timing is counted. Station-side count data is output. The count data selection control unit 17a selects and outputs either the network-side frame timing or the base station-side count data. The actual operation frame timing generation unit 17 generates an actual operation frame timing from one of the frame timings selected by the count data selection control unit 17a.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a principle diagram of a frame timing synchronization establishing apparatus according to the present invention. The frame timing synchronization establishing device 10 establishes frame timing synchronization with the telecommunication line equipment 20 and the radio base station 30. Here, the telecommunication line equipment 20 refers to communication equipment such as transmission equipment and switching equipment in a network.

The network-side frame timing extracting unit 11 extracts network-side frame timing, which is the frame timing of the telecommunication line equipment 20, from the communication data received from the telecommunication line equipment 20. The internal operation clock generation control unit 12 extracts a transmission clock from communication data received from the telecommunication line equipment 20, establishes bit synchronization, and generates an internal operation clock. The base station-side frame timing extracting unit 13 extracts a base station-side frame timing which is a frame timing of the wireless base station 30 from the wireless data received from the wireless base station 30.

The network counter 14 counts a frame period actually operated using the internal operation clock, and outputs network count data synchronized with the network frame timing. The phase difference detection control unit 15 detects a phase difference between the network-side count data and the base station-side frame timing,
Outputs phase difference information.

The actual operation counter 16 counts a frame period actually operated using the internal operation clock,
Outputs the actual operation count data synchronized with the phase difference information. The actual operation frame timing generator 17 generates an actual operation frame timing from the actual operation count data.

Next, the operation will be described. The communication data from the telecommunication line equipment 20 is input to the network-side frame timing extraction unit 11, and the network-side frame timing, which is the frame timing on the telecommunication line equipment 20, is extracted from the communication data. Further, the communication data is also input to the internal operation clock generation control unit 12, from which a transmission clock is extracted and bit synchronization is established, and then an internal operation clock is generated.

The internal operation clock is an operation clock of each unit constituting the frame timing synchronization establishing device 10. Then, the wireless data received from the wireless base station 30 is input to the base station-side frame timing extracting unit 13, and the base station-side frame timing, which is the frame timing of the wireless base station 30, is extracted.

When the network side frame timing is the network side counter 1
4, the frame cycle is counted using the internal operation clock, and network-side count data synchronized with the network-side frame timing is output. The network-side count data and the base station-side frame timing extracted by the base station-side frame timing extraction unit 13 are input to the phase difference detection control unit 15, where the phase difference is detected and output as phase difference information.

When the phase difference information is input to the actual operation counter 16, the frame period actually operated is counted using the internal operation clock, and the actual operation count data synchronized with the phase difference information is output. The actual operation count data is input to the actual operation frame timing generation unit 17, and the actual operation frame timing is generated from the actual operation count data.

Next, a mobile communication system using the frame timing synchronization establishing apparatus 10 of the present invention will be described. FIG. 2 is an image diagram of the mobile communication system.
In four zones, one master base station 30a and three slave base stations 10-1 to 10-3 are arranged as wireless base stations (hereinafter, wireless base stations are abbreviated as base stations). Communication is performed at the same frequency. The master base station 30a and the slave base stations 10-1 to 10-
3 is line-connected to the exchange 20a.

It is assumed that master base station 30a is communicating with PS. First, the slave base stations 10-1 to 10-3
It is necessary to secure an empty transmission / reception slot for communicating with the PS in each zone. For this purpose, the slave base stations 10-1 to 10-3 use the frame timing synchronization establishing device 10 inside each base station (not shown) to establish frame timing synchronization with the master base station 30a. .

After the synchronization of the frame timing is established, the PS
Is communicated between the slave base stations 10-1 to 10-3, and the wireless data is converted into an electric signal at each slave base station. Then, the data is transmitted to another slave base station via the exchange 20a.

Next, the frame timing synchronization establishing device 1
The specific internal configuration of 0 will be described. FIG. 3 is a detailed internal configuration diagram of the frame timing synchronization establishing apparatus 10. The same components as those described with reference to FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

Base station-side frame timing extractor 13
Transmits the radio signal from the master base station 30a to the demodulator 13a
After that, the base station side frame timing is extracted by the reception data processing unit 13b.

The phase difference detection control section 15 detects the phase difference between the network-side count data and the base station-side frame timing by the phase difference detection means 15a. Further, the offset value setting means 15b sets, as an offset value, information obtained by combining the phase difference and a delay correction value when wireless data is received. The coincidence detecting means 15c calculates the logical product of the offset value and the net-side count data, and outputs the coincidence data.

The actual operation counter 16 outputs actual operation count data based on the coincidence data. The actual operation frame timing generation unit 17 generates a frame timing from the actual operation count data. The transmission data generation unit 18 generates transmission data based on the actual operation frame timing, modulates the transmission data with a modulation unit 19 into a radio signal,
Send to PS.

The synchronous mode designating means 15d in the phase difference detection controller 15 designates one of the single mode and the continuous mode for the actual operation counter 16. The single-shot mode is a mode in which the actual operation counter 16 is set to a self-running state after the actual operation counter 16 is synchronized with the phase difference information. The continuous mode is a mode in which the actual operation counter 16 constantly synchronizes with the phase difference information.

As described above, in the one-shot mode, the mobile station runs once after synchronization with the master base station 30a is once established, and is not affected by the frame timing of the telecommunication line equipment 20. Further, in the continuous mode, it is possible to synchronize with the telecommunication line equipment 20 even after synchronization is established with the master base station 30a.

Further, the phase difference display means 15e in the phase difference detection control section 15 displays the phase difference between the network-side count data and the actual operation count data. Thus, in the single mode, after the frame timing synchronization is established, a deviation between the frame timing with the master base station 30a and the frame timing with the telecommunication line equipment 20 can be found.

Next, the processing operation until the actual operation frame timing is generated will be described. FIG. 4 is a timing chart until the actual operation frame timing is generated. The frame timing 11a is the frame timing of the telecommunication line equipment 20 extracted by the network-side frame timing extraction unit 11.

The network-side count data 14a is a count data value counted by the network-side counter 14 using the internal operation clock, and is synchronized with the frame timing 11a. Here, it is assumed that the frame period of the frame timing 11a has n clocks from 0 to n-1.

The frame timing 13c is the frame timing of the master base station 30a extracted by the base station-side frame timing extraction unit 13. Phase difference output signal 1
5a-1 is the phase difference between the network-side count data 14a detected by the phase difference detection means 15a and the frame timing 13c of the master base station 30a. Here, the phase difference between the network-side count data 14a and the frame timing 13c of the master base station 30a is a.

The phase difference information 15c-1 is sent to the coincidence detecting means 1
5c, which is coincidence data between the network-side count data 14a and the phase difference output signal 15a-1. Accordingly, the count value a of the network-side count data 14a and the phase difference output signal 15a-1 are output to the positions shown in the figure where the logical product is obtained. However, information such as a delay correction value when wireless data is received by the offset value setting means 15b described with reference to FIG. 3 is also set as an offset value, so that the information is actually output to a position in consideration of the offset value.

The actual operation count data 16a is a count data value counted by the actual operation counter 16 using the internal operation clock, and counts n clocks from 0 to n-1 in synchronization with the phase difference information 15c-1. I do.

The actual operation frame timing 17a is a frame timing generated by the actual operation frame timing generator 17 based on the actual operation count data 16a. As shown in the figure, normally, the frame timing synchronized with the frame timing of the master base station 30a is set as the actual operation frame timing.

As described above, the frame timing synchronization establishing apparatus 10 of the present invention detects the phase difference between the frame timings of the telecommunication line equipment 20 and the master base station 30a, and synchronizes with any one of the frame timings. The configuration was established. Thereby, the telecommunication line equipment 20
And the master base station 30a at the same time, it is possible to easily cope with external factors such as the system and the environment.

Further, it is possible to easily adjust the frame timing of the own base station, for example, by giving a 90-degree phase to the frame timing of the master base station 30a.
Next, a second embodiment in which fine adjustment of frame timing is performed using a high-speed clock will be described. FIG.
FIG. 3 is a detailed internal configuration diagram of a frame timing synchronization establishing device 10a provided with a high-speed clock oscillator. The same components as those described in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted. The high-speed clock output from the high-speed clock oscillator 40 is input to the phase difference detection unit 15a and the phase adjustment unit 12a included in the internal operation clock generation control unit 12. The phase difference detecting means 15a uses the high-speed clock to detect the phase difference in high-speed clock units in detail, and transmits the phase difference to the phase adjusting means 12a.

The phase adjusting means 12a delays the transmission clock extracted from the telecommunication line equipment 20 in the positive or negative direction based on the phase difference. Then, bit synchronization is established with respect to the clock thus finely adjusted, and a PLL operation is further performed to generate an internal operation clock.

FIGS. 6 and 7 are diagrams showing the amount of phase adjustment of the internal operation clock. In cycle C0 of FIG. 6, the amount of phase adjustment between the transmission clock of the telecommunication line equipment 20, the output clock of the phase adjustment means 12a, and the internal operation clock is zero. In the cycle C1, the phase difference between the transmission clock of the telecommunication line equipment 20 and the output clock of the phase adjusting unit 12a is m. Therefore, in cycle C2, the internal operation clock phase is adjusted by + m.

Similarly, in the cycle C3 of FIG. 7, the phase adjustment amount between the transmission clock of the telecommunication line equipment 20, the output clock of the phase adjustment means 12a, and the internal operation clock is zero. In the cycle C4, the phase difference between the transmission clock of the telecommunication line equipment 20 and the output clock of the phase adjusting means 12a is n. Therefore, in cycle C5, the internal operation clock phase is adjusted by -n.

As described above, the frame timing synchronization establishing apparatus 10a according to the second embodiment detects the phase difference with a clock faster than the transmission clock, and determines the phase of the internal operation clock based on the phase difference. It is designed to be instantly fine-tuned and variable. Thus, the synchronization of the frame timing is established using the high-speed clock as the minimum unit, so that the error can be suppressed to one cycle of the high-speed clock.

Next, a third embodiment of the frame timing synchronization establishing apparatus will be described. FIG. 8 is a principle diagram of the third embodiment of the frame timing synchronization establishing apparatus. The network-side frame timing extracting unit 11 extracts a network-side frame timing, which is a frame timing on the telecommunication line facility 20 side, from communication data received from the telecommunication line facility 20. Internal operation clock generation controller 12
Extracts a transmission clock from communication data received from the telecommunication line equipment 20, establishes bit synchronization, and generates an internal operation clock. The base station-side frame timing extraction unit 13 extracts a base station-side frame timing, which is a frame timing of the wireless base station, from the wireless data received from the wireless base station.

The network-side counter 14 counts the frame period actually operated using the internal operation clock, and outputs network-side count data synchronized with the network-side frame timing. The base station counter 16a counts the frame period using the internal operation clock, and outputs base station count data synchronized with the base station frame timing.

The count data selection control section 17a selects either the network side count data or the base station side count data. Actual operation frame timing generation unit 17
Generates the actual operation frame timing from either the network-side count data or the base station-side count data selected by the count data selection control unit 17a.

Next, the operation will be described. The communication data from the telecommunication line equipment 20 is input to the network-side frame timing extraction unit 11, and the network-side frame timing, which is the frame timing on the telecommunication line equipment 20, is extracted from the communication data. Further, the communication data is also input to the internal operation clock generation control unit 12, from which a transmission clock is extracted and bit synchronization is established, and then an internal operation clock is generated.

The internal operation clock is an operation clock of each unit constituting the frame timing synchronization establishing device 10b. Then, the radio data received from the master base station 30a is input to the base station-side frame timing extraction unit 13, and the base station-side frame timing which is the frame timing of the master base station 30 is extracted.

When the network side frame timing is the network side counter 1
4, the frame cycle is counted using the internal operation clock, and network-side count data synchronized with the network-side frame timing is output. When the base station-side frame timing is input to the base station-side counter 16a, the frame period is counted using the internal operation clock, and the base station-side count data synchronized with the base station-side frame timing is output.

The count data selection control section 17a selects and outputs either the network-side count data or the base station-side count data. As a criterion for selection, the external environment, system factors, and the like are considered. For example, when the master base station 30a does not exist in the vicinity or when the own base station becomes the master base station 30a, the network-side count data is selected, otherwise, the base station-side count data is selected. .

Then, the actual operation frame timing generator 17 generates an actual operation frame timing from the frame timing output from the count data selection controller 17a.

FIG. 9 is a timing chart until the actual operation frame timing is generated. The frame timing 11 a of the telecommunication line equipment 20 is the telecommunication line equipment 2 extracted by the network-side frame timing extraction unit 11.
The frame timing is 0.

The network side count data 14a is a count data value counted by the network side counter 14 using the internal operation clock, and is synchronized with the frame timing 11a. Here, it is assumed that the frame period of the frame timing 11a has n clocks from 0 to n-1.

The frame timing 13c of the master base station 30a is the frame timing of the master base station 30a extracted by the base station-side frame timing extraction unit 13. The base station side count data 16a-1 is a count data value counted by the base station side counter 16a using the internal operation clock, and is synchronized with the frame timing 13c. The frame cycle of the frame timing 13c also has n clocks from 0 to n-1.

The output of the count data selection control section 17a selects and outputs either the network side count data 14a or the base station side count data 16a-1. The actual operation frame timing 17a generates the actual operation frame timing 17a from the frame timing output from the count data selection control unit 17a.

As described above, the frame timing synchronization establishing apparatus 10b of the present invention is configured to operate the network side counter 14 and the base station side counter 16a independently to establish the frame timing synchronization. This makes it possible to easily change the frame timing of the telecommunication line equipment 20 or the master base station 30a.

[0064]

As described above, the frame timing synchronization establishing apparatus of the present invention detects the phase difference between the frame timings of the telecommunication line equipment and the radio base station, and establishes synchronization with either one of the frame timings. Configuration. As a result, since the frame timing of the telecommunication line equipment and the radio base station can be held at the same time,
It is possible to easily respond to external factors such as the system and the environment.

Further, the frame timing synchronization establishing apparatus of the present invention is configured to detect the phase difference of the frame timing between the telecommunication line equipment and the radio base station using the high-speed clock. This makes it possible to establish the synchronization of the frame timing by reducing the error of the frame timing.

[Brief description of the drawings]

FIG. 1 is a principle diagram of a frame timing synchronization establishing apparatus according to the present invention.

FIG. 2 is an image diagram of a mobile communication system.

FIG. 3 is a detailed internal configuration diagram of a frame timing synchronization establishing apparatus.

FIG. 4 is a timing chart until actual operation frame timing is generated.

FIG. 5 is a detailed diagram of an internal configuration of a frame timing synchronization establishing device provided with a high-speed clock oscillator.

FIG. 6 is a diagram showing a phase adjustment amount (+ m) of an internal operation clock.

FIG. 7 is a diagram showing a phase adjustment amount (-n) of an internal operation clock.

FIG. 8 is a principle diagram of a third embodiment of a frame timing synchronization establishing apparatus.

FIG. 9 is a timing chart until actual operation frame timing is generated.

FIG. 10 is a diagram showing a slot arrangement of a TDMA-TDD frame, in a case where synchronization of frame timing of each radio base station is established.

FIG. 11 is a diagram showing a slot arrangement of a TDMA-TDD frame in a case where synchronization of frame timing of each wireless base station is not established.

FIG. 12 is a schematic configuration diagram of a conventional radio base station for establishing frame timing synchronization.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 frame timing synchronization establishing device 11 network-side frame timing extraction unit 12 internal operation clock generation control unit 13 base station-side frame timing extraction unit 14 network-side counter 15 phase difference detection control unit 16 actual operation counter 17 actual operation frame timing generation unit 20 Telecommunications line equipment 30 wireless base stations

Claims (6)

[Claims] 1. A frame timing synchronization establishing apparatus for establishing frame timing synchronization with a telecommunication line facility and a radio base station, wherein the frame timing is a frame timing on the telecommunication line facility side from communication data received from the telecommunication line facility. A network-side frame timing extraction unit that extracts a network-side frame timing, an internal operation clock generation control unit that extracts a transmission clock from the communication data to establish bit synchronization, and generates an internal operation clock, A base station-side frame timing extraction unit that extracts a base station-side frame timing, which is a frame timing of the wireless base station, from the received wireless data, and counts a frame period using the internal operation clock. Network side that outputs synchronized network count data A phase difference detection control unit that detects a phase difference between the network-side count data and the base station-side frame timing, and outputs phase difference information, and counts the frame period using the internal operation clock, Frame timing synchronization, comprising: an actual operation counter that outputs actual operation count data synchronized with the phase difference information; and an actual operation frame timing generator that generates an actual operation frame timing from the actual operation count data. Establishing device. 2. The phase difference detection control unit, after the real operation counter is synchronized with the phase difference information, a one-shot mode for setting the real operation counter to a self-running state, or the real operation counter based on the phase difference information. 2. The frame timing synchronization establishing apparatus according to claim 1, further comprising a synchronization mode designating means for designating any one of continuous modes in which the counter always performs synchronization. 3. The phase difference information output by the phase difference detection control unit, wherein the phase difference between a delay correction value at the time of receiving the wireless data and the network-side count data and the base station-side frame timing. 2. The frame timing synchronization establishing apparatus according to claim 1, wherein the offset value is obtained by combining 4. The internal operation clock generation control unit finely adjusts the internal operation clock based on the phase difference detected by the phase difference detection control unit using a high-speed clock faster than the transmission clock. 2. The frame timing synchronization establishing apparatus according to claim 1, further comprising a phase adjusting unit that performs the phase adjustment. 5. The apparatus according to claim 1, wherein the phase difference detection control unit includes phase difference display means for displaying the phase difference. 6. A frame timing synchronization establishing apparatus for establishing frame timing synchronization with a telecommunication line facility and a radio base station, wherein the frame timing is a frame timing on the telecommunication line facility side based on communication data received from the telecommunication line facility. A network-side frame timing extraction unit that extracts a network-side frame timing, an internal operation clock generation control unit that extracts a transmission clock from the communication data to establish bit synchronization, and generates an internal operation clock, A base station-side frame timing extraction unit that extracts a base station-side frame timing, which is a frame timing of the wireless base station, from the received wireless data, and counts a frame period using the internal operation clock. Network side that outputs synchronized network count data A base station side counter that counts the frame period using the internal operation clock and outputs base station side count data synchronized with the base station side frame timing; and the network side count data or the base station side. A count data selection control unit for selecting any of the count data; and an actual operation frame timing generation for generating an actual operation frame timing from the network-side count data or the base station-side count data selected by the count data selection control unit. A frame timing synchronization establishing apparatus, comprising: