JP3957691B2 - Mobile radio communication system - Google Patents

Description

  The present invention is used for a base station of a mobile radio communication system having a radio base station unit and a transceiver unit. In particular, when the distance between the radio base station unit and the transmitter / receiver unit is long, and the distance between the radio base station unit and the transmitter / receiver unit is connected by a single optical fiber by the full duplex method of optical transmission (transmission / reception one-core bidirectional), and the transmission delay cannot be ignored Use.

  A configuration of a conventional mobile radio communication system that performs optical delay correction will be described with reference to a block diagram of a conventional radio base station unit and transceiver unit in FIG. In this specification, the direction from the radio base station unit 1 to the transceiver unit 2 is defined as the downlink direction, and the direction from the transceiver unit 2 to the radio base station unit 1 is defined as the uplink direction.

  As shown in FIG. 6, the mobile radio communication system includes a radio base station unit 1 that accesses data with a host device, a transceiver unit 2 that transmits / receives data to / from a mobile phone, and an optical fiber 3 that relays data between them. The The downlink is a serial-parallel device 5 that converts parallel data from the baseband signal processing unit 4 that performs data demultiplexing and the like into serial data, and an optical module unit 6 that converts the serial data from the serial-parallel device 5 into electro-optical conversion ( E / O unit), an optical module unit 7 (O / E unit) that performs photoelectric conversion through the optical fiber 3, a serial-parallel device 8 that converts serial data into parallel data, and signal processing that performs data demultiplexing and the like The unit 9 and a radio unit 10 that performs A / D conversion and amplification for converting analog data into digital data.

  The uplink is serialized through a radio unit 10 that performs processing such as D / A conversion for converting received data from the antenna of the transmitter / receiver unit 2 from digital data to analog data, a signal processing unit 9 and a serial parallel device 8. An optical module unit 7 (E / O unit) that converts the data from the radio unit 10 into electro-optical, an optical module unit 6 (O / E unit) that performs optical-electrical conversion through the optical fiber 3, and an electrical signal converted in parallel. And a baseband signal processing unit 4 that performs data processing.

  The baseband signal processing unit 4 uses a delay amount measurement data transmission unit 11 that transmits fixed data at a constant period and a signal processing unit 9 from the transceiver unit 2 to measure the return delay amount in the downlink and uplink of the optical fiber 3. A delay amount measurement counter 12 that measures fixed data to be turned back, and a delay amount correction buffer unit 13 that calculates a delay correction amount from the value of the delay amount counter 12 and delays the data upstream and downstream respectively.

  The optical module unit 6 and the optical module unit 7 employ a single-core bidirectional wavelength division multiplexing (WDM) method in which transmission / reception is performed using one optical fiber 3.

  Next, the operation of the conventional mobile radio communication system will be described with reference to FIG. 7 and FIG. FIG. 7 is a block diagram showing the series-parallel devices 5 and 8 and the optical module units 6 and 7 which are WDM parts out of the mobile radio communication system configuration shown in FIG. 6 for easy understanding. Below, it demonstrates with reference to FIG. FIG. 8 is a flowchart showing a delay amount correction procedure in a conventional mobile radio communication system.

  In the baseband signal processing unit 4 and CPU unit 101 on the radio base station unit 1 side and the flow on the transceiver unit 2 side, the apparatus power supply is started as shown in FIG. 8 (301). After performing the optical line connection confirmation with the transceiver unit 2 side in the baseband signal processing unit 4 (302), the delay amount multiplexed from the delay amount measurement data transmission unit 11 to the downlink transmission data on the transceiver unit 2 side The measurement fixed data is transmitted (303), and the signal processing unit 9 of the transmitter / receiver unit 2 returns the delay amount measurement fixed data (304) to the delay amount measurement counter 12 of the baseband signal processing unit 4. The delay amount measurement fixed data is received (305).

After reading the delay amount measurement counter value (306), the CPU unit 101 calculates the delay amount correction value (307), and receives the result from the transmission delay amount correction buffer unit 102 of the delay amount correction buffer unit 13. Each is set in the delay amount correction buffer unit 103 (308), and the normal operation is started in which the data corresponding to the correction value is delayed so as to synchronize with the maximum delay amount of the transmitter / receiver unit 2 located farthest away (309).
JP 9-23473 A JP-A-11-261617

  However, the conventional optical delay correction system has the following problems. When calculating the delay amount correction value, the value obtained by simply halving the value of the delay amount measurement counter 12 that is folded back and forth is used, and therefore, especially in the long distance (100 km or more) That is, it is impossible to set each accurate delay correction value.

  That is, in a radio apparatus equipped with a conventional optical delay amount correction circuit, the total amount of loop-back aliasing between the radio base station unit 1 and the transceiver unit 2 is measured by the delay amount measurement counter, and the counter value is halved. The delay correction value is calculated from the value obtained (assuming that the downlink delay amount = the uplink delay amount). However, in actuality, the downlink and the uplink are different in delay time when the wavelength of the optical module is different even at the same optical fiber 3 distance. Therefore, when the counter value is simply halved, the transmission delay of each of the downlink and the uplink is different. Error (especially for long distances) may adversely affect the system, such as communication failures.

  For example, as disclosed in Patent Document 1, in the method of connecting the downlink and the uplink by separate optical fibers instead of WDM, since there is a difference in the optical fiber lengths in the downlink and uplink from the beginning, simply, There is a proposal to avoid an error due to the delay amount being a value obtained by halving the delay amount measurement counter value, but it cannot be applied to the single-core bidirectional wavelength division multiplexing (WDM).

  Also, for example, Patent Document 2 discloses a technique for performing accurate delay measurement in WDM, but the radio base station unit measures the delay time of each transceiver unit by loopback and performs delay correction. In addition, since it is necessary to perform complicated delay measurement, it is difficult to easily put it into practical use.

  The present invention has been made in such a background, and provides a mobile radio communication system capable of improving a transmission delay error between sectors of a transmitter / receiver unit protruding far away with a simple configuration. The purpose is to do.

  The present invention recognizes different absolute delay times between a radio base station unit and each transmitter unit extending far away in a mobile radio communication system employing a full duplex system for optical transmission (transmission / reception single-core bidirectional). Even if this is not the case, the signal processing unit of the radio base station unit can measure the delay time with each transmitter / receiver unit and correct it according to the maximum delay time of the farthest transmitter / receiver unit.

  In the downlink and uplink optical transmission paths, a fixed magnification considering the known difference in optical transmission rates of optical signals having different wavelengths is used as a measurement value of the folded delay measurement counter (total downlink and uplink delay time). ). Based on the result, a delay correction value is calculated and set in the transmission delay amount correction buffer unit and the reception delay amount correction buffer unit, respectively.

  That is, in the control of the CPU unit, constant magnifications M1 and M2 that take into account the known difference in transmission speed of optical signals having different downstream and upstream wavelengths are set to the delayed delay times of the delay amount measurement counter, respectively. The transmission / reception data is delayed by setting in the delay amount correction buffer unit. In this way, the present invention can improve the transmission delay error between sectors of the overhanging transceiver unit as compared with the conventional one.

  That is, a first aspect of the present invention includes a radio base station unit, a transceiver unit, and an optical fiber that connects the radio base station unit and the transceiver unit, and the radio base station unit starts data communication. The delay measurement fixed data is transmitted to the transmitter / receiver unit before the delay measurement fixed data is returned from the transmitter / receiver unit to measure the transmission delay amount of the optical signal. This is a mobile radio communication system that employs a full-duplex optical transmission system (transmission / reception single-core bidirectional).

  Here, a feature of the present invention is that the radio base station unit is adapted to a wavelength of a downstream optical signal that is a direction from the radio base station unit that transmits the optical fiber to the transceiver unit. Means for storing transmission rate information of an optical signal, wherein the transceiver unit is responsive to a wavelength of an upstream optical signal that is a direction from the transceiver unit that transmits the optical fiber to the radio base station unit. Means for storing the transmission rate information of the optical signal, and the wireless base station section refers to the means for storing both before the start of data communication, between the wireless base station section and the transceiver section The transmission delay amount measured by the measuring means is corrected in the downlink and uplink directions based on the transmission rate information of the downlink and uplink optical signals depending on the wavelength to be used for data communication. It is in place and means.

Each of the correcting means includes a calculating means for correcting the transmission delay amount measured by the measuring means by multiplying by a multiplication factor, and the calculating means has a wavelength of a downstream optical signal of λi, When the transmission speed of the optical signal having the wavelength λi is Vi and the wavelength of the optical signal in the upstream direction is λj, and the transmission speed of the optical signal having the wavelength λj is Vj, the magnifications Mi and Mj are respectively set to Mi = 1 / ((Vi / Vj) +1)
Mj = 1 / ((Vj / Vi) +1)
And a means for correcting the transmission delay amount by multiplying Mi for the downstream optical signal and a means for correcting the transmission delay amount by multiplying Mj for the upstream optical signal. .

  Alternatively, each of the means for correcting can include means for holding a delay amount correction value calculated in advance based on the magnification for each of a plurality of combinations of wavelengths of optical signals in the downstream and upstream directions.

  As described above, by performing the calculation in advance, the amount of memory used in the storing means increases, but the calculation processing in the correcting means can be omitted, so that the processing speed can be increased. .

  A second aspect of the present invention includes a radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit, the radio base station unit prior to the start of data communication And a means for transmitting the delay measurement fixed data to the transceiver unit and measuring the transmission delay amount of the optical signal from the time until the delay measurement fixed data is returned from the transceiver unit and returned. It is the said radio | wireless base station part applied to the mobile radio | wireless communications system which employ | adopted the full duplex system (transmission / reception 1 core bidirectional | two-way) of transmission.

  Here, a feature of the present invention is that the transmission rate information of the optical signal according to the wavelength of the optical signal in the downstream direction, which is the direction from the radio base station unit transmitting through the optical fiber to the transceiver unit. Prior to the start of data communication, and the uplink that is in the direction from the transceiver unit transmitting through the optical fiber provided in the transceiver unit to the radio base station unit Dependent on the wavelength to be used for the data communication between the radio base station unit and the transceiver unit with reference to both means for storing the transmission rate information of the optical signal according to the wavelength of the direction optical signal And a means for correcting the transmission delay amount measured by the means for measuring based on the transmission rate information of the optical signal in the upstream direction, respectively, in the downstream and upstream directions.

Each of the correcting means includes a calculating means for correcting the transmission delay amount measured by the measuring means by multiplying by a multiplication factor, and the calculating means has a wavelength of a downstream optical signal of λi, When the transmission speed of the optical signal having the wavelength λi is Vi and the wavelength of the optical signal in the upstream direction is λj, and the transmission speed of the optical signal having the wavelength λj is Vj, the magnifications Mi and Mj are respectively set to Mi = 1 / ((Vi / Vj) +1)
Mj = 1 / ((Vj / Vi) +1)
And a means for correcting the transmission delay amount by multiplying Mi for the downstream optical signal and a means for correcting the transmission delay amount by multiplying Mj for the upstream optical signal. .

  Alternatively, each of the means for correcting can include means for holding a delay amount correction value calculated in advance based on the magnification for each of a plurality of combinations of wavelengths of optical signals in the downstream and upstream directions.

  A third aspect of the present invention includes a radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit, the radio base station unit prior to the start of data communication And a means for transmitting the delay measurement fixed data to the transceiver unit and measuring the transmission delay amount of the optical signal from the time until the delay measurement fixed data is returned from the transceiver unit and returned. It is the said transmitter-receiver part applied to the mobile radio | wireless communications system which employ | adopted the full duplex system (transmission / reception 1 core bidirectional | two-way) of transmission.

  Here, the feature of the present invention is that the transmission rate information of the optical signal according to the wavelength of the upstream optical signal, which is the direction from the transceiver unit transmitting through the optical fiber to the radio base station unit. Is provided with a means for memorizing.

  According to a fourth aspect of the present invention, when installed in an information processing device, the information processing device includes a radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit. The radio base station unit transmits delay measurement fixed data to the transceiver unit prior to the start of data communication, and the time until the delay measurement fixed data is returned from the transceiver unit and returned. For realizing the function of controlling the radio base station applied to a mobile radio communication system employing a full duplex system (transmission / reception single-core bi-directional) of optical transmission provided with means for measuring a transmission delay amount of an optical signal from It is.

  Here, a feature of the present invention is that the transmission rate information of the optical signal according to the wavelength of the optical signal in the downstream direction, which is the direction from the radio base station unit transmitting through the optical fiber to the transceiver unit. Prior to the start of data communication, and the uplink that is the direction from the transceiver unit transmitting through the optical fiber provided in the transceiver unit to the radio base station unit Dependent on the wavelength to be used for the data communication between the radio base station unit and the transceiver unit with reference to both means for storing the transmission rate information of the optical signal according to the wavelength of the direction optical signal And a function of correcting the transmission delay amount measured by the measuring means based on the transmission rate information of the optical signal in the upstream direction and the upstream direction, respectively, in the downstream and upstream directions.

As each of the correction functions, a calculation function for correcting by multiplying the transmission delay amount measured by the measuring means by a magnification is realized, and as this calculation function, the wavelength of the optical signal in the downstream direction is λi, When the transmission speed of the optical signal having the wavelength λi is Vi and the wavelength of the optical signal in the upstream direction is λj, and the transmission speed of the optical signal having the wavelength λj is Vj, the magnifications Mi and Mj are respectively set to Mi = 1. / ((Vi / Vj) +1)
Mj = 1 / ((Vj / Vi) +1)
And a function of correcting an optical signal in the downward direction by multiplying the transmission delay amount by Mi, and a function of correcting the optical signal in the upward direction by multiplying the transmission delay amount by Mj. it can.

  Alternatively, as each of the correction functions, it is possible to realize a function of holding a delay amount correction value calculated in advance based on the magnification for each of a plurality of combinations of wavelengths of the downstream and upstream optical signals.

  Alternatively, the program of the present invention is installed in an information processing apparatus, and the information processing apparatus includes a radio base station unit, a transceiver unit, and an optical fiber that connects the radio base station unit and the transceiver unit. The radio base station unit transmits the delay measurement fixed data to the transceiver unit prior to the start of data communication, and the delay measurement fixed data is returned from the transmitter / receiver unit and returned. A program for realizing a function of controlling the transceiver unit applied to a mobile radio communication system adopting a full duplex system for optical transmission (transmission / reception single-core bidirectional) having means for measuring a transmission delay amount of an optical signal. is there.

  Here, the feature of the present invention is that the transmission rate information of the optical signal according to the wavelength of the upstream optical signal, which is the direction from the transceiver unit transmitting through the optical fiber to the radio base station unit. The function to memorize is to be realized.

  By recording the program of the present invention on the recording medium of the present invention, the information processing apparatus can install the program of the present invention using this recording medium. Alternatively, the program of the present invention can be directly installed in the information processing apparatus via a network from a server holding the program of the present invention.

  Thereby, it is possible to realize a mobile radio communication system that can improve a transmission delay error between sectors of a transmitter / receiver unit that projects far away with a simple configuration using a general-purpose information processing device.

  The first effect is that the delay amount correction for each of the downlink and the uplink can be set with high accuracy, so that the transmission delay error between sectors can be improved. The reason for this is that the delay amount correction buffer unit is multiplied by the measured counter value (total delay time) that has been multiplied by a fixed magnification in consideration of the known difference in transmission speed of optical signals having different downstream and upstream wavelengths. This is because it is set.

  The second effect is improvement of work efficiency at the time of WDM optical module replacement work. The reason is that, at the time of exchanging the WDM optical module, conventionally, it is necessary for the operator to manually set the magnification M in the delay amount correction buffer unit. This is because the setting operation of the magnification M can be automated because the sequence for setting the magnification M is provided.

  A configuration of a mobile radio communication system according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block configuration diagram of a radio base station unit and a transceiver unit of the present embodiment.

  As shown in FIG. 1, the mobile radio communication system of the present embodiment includes a radio base station unit 1, a transceiver unit 2, and an optical fiber 3 that connects the radio base station unit 1 and the transceiver unit 2. Prior to the start of data communication, the base station unit 1 transmits the delay measurement fixed data to the transmitter / receiver unit 2, and the time from the time until the delay measurement fixed data is returned from the transmitter / receiver unit 2 and returned is returned. This is a mobile radio communication system that employs a full duplex system for optical transmission (transmission / reception single-core bidirectional) including a delay amount measurement data transmitter 11 and a delay amount measurement counter 12 for measuring a transmission delay amount.

  Here, the feature of the present embodiment is that the radio base station unit 1 responds to the wavelength of the optical signal in the downstream direction, which is the direction from the radio base station unit 1 transmitting through the optical fiber 3 to the transceiver unit 2. The optical module type storage unit (A) 104 for storing the transmission rate information of the optical signal is provided, and the transceiver unit 2 is directed from the transceiver unit 2 transmitting in the optical fiber 3 toward the radio base station unit 1. An optical module type storage unit (B) 105 that stores transmission rate information of the optical signal corresponding to the wavelength of a certain upstream optical signal is provided, and the radio base station unit 1 stores the optical module type prior to the start of data communication. Based on the transmission rate information of the optical signals in the downlink and uplink directions depending on the wavelength to be used for the data communication between the radio base station unit 1 and the transceiver unit 2 with reference to the units (A) 104 and (B) 105 delay It is in place and a CPU 101 for correcting each transmission delay amount measured by the measurement counter 12 at the downstream and upstream directions.

The CPU unit 101 includes calculation means for correcting the transmission delay amount measured by the delay amount measurement counter 12 by multiplying by a multiplication factor. This calculation means has a wavelength of the optical signal in the downstream direction of λi, and this wavelength When the transmission speed of the optical signal of λi is Vi and the wavelength of the optical signal in the upstream direction is λj, and the transmission speed of the optical signal of this wavelength λj is Vj, the magnifications Mi and Mj are respectively set to Mi = 1 / ( (Vi / Vj) +1)
Mj = 1 / ((Vj / Vi) +1)
And a means for correcting the transmission delay amount by multiplying Mi for the downstream optical signal and a means for correcting the transmission delay amount by multiplying the transmission delay amount for Mj.

  The present invention can be implemented as a program that, when installed in a general-purpose information processing apparatus, causes the information processing apparatus to realize the function of controlling the radio base station unit 1 or the transceiver unit 2 of the present invention. This program is recorded on a recording medium and installed in the information processing apparatus, or installed in the information processing apparatus via a communication line, so that the information processing apparatus stores the delayed optical module type storage unit (A) 104 or ( B) 105 and the CPU unit 101 can realize corresponding functions.

  Hereinafter, this embodiment will be described in more detail.

  In the mobile radio communication system of this embodiment, an optical module type storage unit (A) 104 is added to the conventional radio base station unit 1 shown in FIG. 6, and an optical module type storage unit (B) is added to the transceiver unit 2. It is the structure which was made. FIG. 2 is a block diagram showing the series-parallel devices 5 and 8 and the optical module units 6 and 7 in the WDM portion in the wireless communication system configuration shown in FIG. 1 in order to make the explanation easy to understand. Hereinafter, description will be given with reference to FIG.

  A detailed configuration related to the delay amount correction of this embodiment will be described with reference to FIG. The baseband signal processing unit 4 includes a CPU unit 101, a delay amount measurement data transmission unit 11, a delay amount measurement counter 12, and a delay amount correction buffer unit 13.

  The CPU unit 101 controls the transmission of the delay amount measurement fixed data from the delay amount measurement data transmission unit 11, receives the counter value from the delay amount measurement counter 12, and calculates the delay amount correction value. Further, the delay amount correction buffer unit 13 receives the downstream delay amount correction value calculated by the CPU unit 101, and similarly to the transmission delay amount correction buffer unit 102 that delays transmission data by the correction value, the upstream delay amount. The reception delay amount correction buffer unit 103 receives the correction value and delays the reception data by the correction value.

  The optical module sections 6 and 7 in FIG. 1 have different wavelength lasers. The optical module type storage unit (A) 104 and the optical module type storage unit (B) 105 for the CPU unit 101 to determine the type of the optical module store optical module type information in the optical module units 6 and 7, respectively. is doing.

  If the wavelength of the optical signal is different between downstream and upstream, the delay time passing through the optical fiber 3 is different between downstream and upstream. Therefore, the counter value of the delay measurement counter 12 for measuring the total return is varied in the downstream and upstream. It is necessary to correct each.

  FIG. 3 shows a calculation formula for the delay amount correction value. If the downstream and upstream laser wavelengths are λ1 and λ2, and if the downstream and upstream optical transmission rates are V1 and V2, the transmission magnification M1 related to the delay measurement counter value is 1 / (V1 / V2 + 1) and the reception magnification M1 is 1 / (V2 / V1 + 1). As a result, each setting of the transmission delay amount correction buffer unit 102 and the reception delay amount correction buffer unit 103 is adjusted from the maximum delay amount to the delay amount in order to match the maximum delay time that is farthest from the number of installed transceiver units 2. It is a value obtained by subtracting measurement counter value × magnification M.

  Next, the operation of the wireless communication system of the present embodiment will be described with reference to the flowchart of FIG. In the sequence of the baseband signal processing unit 4 and CPU unit 101 on the radio base station unit 1 side and the transmitter / receiver unit 2 side, first, the apparatus power supply on the radio base station unit 1 side and the transceiver unit 2 side is started (201). . After confirming the optical line connection with the transceiver unit 2 side in the baseband signal processing unit 4 (202), the CPU unit 101 includes the optical module type storage unit (A) 104 on the wireless base station unit 1 side and the transceiver. The type information of the optical module type storage unit (B) 105 on the unit 2 side is acquired by reading the optical module type storage units A and B (203). Next, the delay amount measurement data transmission unit 11 transmits the delay amount measurement fixed data multiplexed with the downlink transmission data to the transceiver unit 2 side (204), and the signal processing unit 9 of the transceiver unit 2 The delay amount measurement fixed data is returned (205), and then the delay amount measurement fixed data is received by the delay amount measurement counter 12 of the baseband signal processing unit 4 (206). The CPU unit 101 reads the delay amount measurement counter value (207), and then calculates the transmission and reception delay amount correction values shown in FIG. 3 (208). The result is the transmission delay of the delay amount correction buffer unit 13. It is set in the amount correction buffer unit 102 and the reception delay amount correction buffer 103 respectively (209), and the normal operation is performed by delaying the data corresponding to the correction value so as to synchronize with the maximum delay amount of the transmitter / receiver unit 2 located at the maximum distance. Enter (210).

  Another embodiment will be described with reference to FIG. FIG. 5 is a diagram showing delay amount correction values in other embodiments. As another embodiment, the CPU unit 101 includes means for holding a delay amount correction value calculated in advance based on the magnification for each of a plurality of combinations of wavelengths of optical signals in the downstream and upstream directions. FIG. 5 shows a calculation formula of the delay amount correction value, but this is for easy understanding of the explanation, and actually, the delay amount correction value as the calculated result is held.

  That is, in the optical module mounted on the radio base station unit 1 and the transceiver unit 2, when there are several types of wavelengths having different wavelengths λn and opposing sets (for example, λ1, λ3) are mounted, the CPU unit 101 The necessary amount M is applied to the opposite set, and the delay amount correction value is calculated and set in the downstream and upstream delay amount correction buffer units 13 respectively. According to this, although the memory usage in the optical module type storage units (A) 104 and (B) 105 increases, the calculation processing in the CPU unit 101 can be omitted, so that the processing speed can be increased. .

  According to the present invention, since it is possible to set the delay amount correction for each of the downlink and the uplink with high accuracy, it is possible to improve the transmission delay error between sectors. As a result, it is possible to reduce the possibility of adversely affecting the system, such as a communication failure in the optical communication system, and to improve the reliability of the optical communication system.

  In addition, when the WDM optical module is replaced, it is necessary to set the magnification M in the delay amount correction buffer unit. However, in the present invention, the CPU unit automatically sets the magnification M based on the optical module type information when the power is turned on. Therefore, the setting work manually performed by the operator can be omitted during the WDM optical module replacement work, and the efficiency of the WDM optical module replacement work can be improved.

The block block diagram of the wireless base station part and transceiver part of a present Example. The block block diagram which abbreviate | omitted the WDM part of the radio base station part and transmission / reception function part of a present Example. The figure which shows the calculation formula of the delay amount correction value of a present Example. The flowchart which shows operation | movement of the mobile radio | wireless communications system of a present Example. The figure which shows the delay amount correction value of another Example. The block block diagram of the conventional radio base station part and the transmitter-receiver part. The block block diagram which abbreviate | omitted the WDM part of the conventional radio base station part and the transmitter-receiver part. The flowchart which shows operation | movement of the conventional mobile radio | wireless communications system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radio base station part 2 Transmitter / receiver part 3 Optical fiber 4 Baseband signal processing part 5, 8 Serial parallel device 6, 7 Optical module part 9 Signal processing part 10 Wireless part 11 Delay amount measurement data transmission part 12 Delay amount measurement counter 13 Delay Amount correction buffer unit 101 CPU unit 102 Transmission delay amount correction buffer unit 103 Reception delay amount correction buffer unit 104 Optical module type storage unit (A)
105 Optical module type storage (B)
201-210, 301-309 steps

Claims (11)

A radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit;
The radio base station section transmits delay measurement fixed data to the transceiver section prior to the start of data communication, and the optical signal from the time until the delay measurement fixed data is returned from the transceiver section and returned. In a mobile radio communication system employing a full-duplex optical transmission system (transmission / reception single-core bidirectional) equipped with means for measuring the transmission delay amount of
The radio base station unit includes means for storing transmission rate information of the optical signal according to a wavelength of a downstream optical signal that is a direction from the radio base station unit that transmits the optical fiber to the transceiver unit. ,
The transceiver unit includes means for storing transmission rate information of the optical signal according to a wavelength of an upstream optical signal that is a direction from the transceiver unit that transmits the optical fiber to the radio base station unit. ,
Prior to the start of data communication, the radio base station unit refers to the means for storing both, and the downlink and uplink directions depend on the wavelength to be used for the data communication between the radio base station unit and the transceiver unit. And a means for correcting the transmission delay amount measured by the means for measuring based on the transmission rate information of the optical signal in the downlink and uplink directions, respectively. Each of the means for correcting comprises calculation means for correcting by multiplying a transmission delay amount measured by the means for measuring by a multiplication factor,
This means of calculation is
The wavelength of the optical signal in the downstream direction is λi, the transmission speed of the optical signal of this wavelength λi is Vi, the wavelength of the optical signal in the upstream direction is λj, and the transmission speed of the optical signal of this wavelength λj is Vj. Sometimes the magnifications Mi and Mj are respectively Mi = 1 / ((Vi / Vj) +1)
Mj = 1 / ((Vj / Vi) +1)
Means for calculating by
The mobile radio communication according to claim 1, comprising means for correcting the transmission delay amount by multiplying Mi for a downstream optical signal and correcting the transmission delay amount by multiplying Mj for an upstream optical signal. system. 3. The mobile radio communication according to claim 2 , wherein each of the means for correcting comprises means for holding a delay amount correction value calculated in advance based on the magnification for each of a plurality of combinations of wavelengths of optical signals in the downstream and upstream directions. system. A radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit;
The radio base station section transmits delay measurement fixed data to the transceiver section prior to the start of data communication, and the optical signal from the time until the delay measurement fixed data is returned from the transceiver section and returned. In the radio base station section applied to a mobile radio communication system adopting a full duplex system of optical transmission (transmission / reception single-core bidirectional) having means for measuring the transmission delay amount of
Means for storing transmission rate information of the optical signal according to the wavelength of the optical signal in the downlink direction, which is a direction from the radio base station unit transmitting through the optical fiber to the transceiver unit;
Prior to the start of data communication, the wavelength of the optical signal in the upstream direction, which is the direction from the transceiver unit that transmits through the optical fiber provided in the transceiver unit and the wireless base station unit that is stored in the transceiver unit Referring to both of the means for storing the transmission rate information of the optical signal in accordance with the optical signal in the downlink and uplink directions depending on the wavelength to be used for the data communication between the radio base station unit and the transceiver unit Means for correcting the transmission delay amount measured by the means for measuring based on the transmission rate information in the downlink and uplink directions, respectively. Each of the means for correcting comprises calculation means for correcting by multiplying a transmission delay amount measured by the means for measuring by a multiplication factor,
This means of calculation is
The wavelength of the optical signal in the downstream direction is λi, the transmission speed of the optical signal of this wavelength λi is Vi, the wavelength of the optical signal in the upstream direction is λj, and the transmission speed of the optical signal of this wavelength λj is Vj. Sometimes the magnifications Mi and Mj are respectively Mi = 1 / ((Vi / Vj) +1)
Mj = 1 / ((Vj / Vi) +1)
Means for calculating by
5. The radio base station section according to claim 4, comprising means for correcting the transmission delay amount by multiplying Mi for a downstream optical signal, and correcting the transmission delay amount by multiplying Mj for an upstream optical signal. . 6. The radio base station section according to claim 5 , wherein each of the means for correcting comprises means for holding a delay amount correction value calculated in advance based on the magnification for each of a plurality of combinations of wavelengths of optical signals in the downlink and uplink directions. . A radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit;
The radio base station section transmits delay measurement fixed data to the transceiver section prior to the start of data communication, and the optical signal from the time until the delay measurement fixed data is returned from the transceiver section and returned. In the transmitter / receiver unit applied to a mobile radio communication system adopting a full duplex system of optical transmission (transmission / reception one-core bidirectional) having means for measuring the transmission delay amount of
Means for storing transmission rate information of the optical signal according to the wavelength of the optical signal in the upstream direction, which is a direction from the transceiver unit transmitting through the optical fiber toward the radio base station unit. Transceiver part. By installing on an information processing device,
A radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit;
The radio base station section transmits delay measurement fixed data to the transceiver section prior to the start of data communication, and the optical signal from the time until the delay measurement fixed data is returned from the transceiver section and returned. In a program for realizing a function of controlling the radio base station portion applied to a mobile radio communication system adopting a full duplex system of optical transmission (transmission / reception single-core bidirectional) having means for measuring the transmission delay amount of
A function of storing transmission rate information of the optical signal according to the wavelength of the optical signal in the downlink direction, which is a direction from the radio base station unit transmitting through the optical fiber to the transceiver unit;
Prior to the start of data communication, the wavelength of the optical signal in the upstream direction, which is the direction from the transceiver unit transmitting through the optical fiber provided in the transceiver unit to the radio base station unit, and the function to be stored therein Referring to both of the means for storing the transmission rate information of the optical signal in accordance with the optical signal in the downlink and uplink directions depending on the wavelength to be used for the data communication between the radio base station unit and the transceiver unit And a function of correcting the transmission delay amount measured by the means for measuring based on the transmission rate information in the downlink and uplink directions, respectively. As each of the correction functions, a calculation function for correcting by multiplying the transmission delay amount measured by the measuring means by a magnification is realized,
As this calculation function,
The wavelength of the optical signal in the downstream direction is λi, the transmission speed of the optical signal of this wavelength λi is Vi, the wavelength of the optical signal in the upstream direction is λj, and the transmission speed of the optical signal of this wavelength λj is Vj. Sometimes the magnifications Mi and Mj are respectively Mi = 1 / ((Vi / Vj) +1)
Mj = 1 / ((Vj / Vi) +1)
With the function to calculate by
9. The program according to claim 8, wherein a function for correcting an optical signal in a downlink direction by multiplying the transmission delay amount by Mi and a function for correcting an optical signal in an uplink direction by multiplying the transmission delay amount by Mj. 10. The program according to claim 9 , wherein the correction function realizes a function of holding a delay amount correction value calculated in advance based on the magnification for each of a plurality of combinations of wavelengths of optical signals in the downstream and upstream directions.
By installing on an information processing device,
A radio base station unit, a transceiver unit, and an optical fiber connecting the radio base station unit and the transceiver unit;
The radio base station section transmits delay measurement fixed data to the transceiver section prior to the start of data communication, and the optical signal from the time until the delay measurement fixed data is returned from the transceiver section and returned. In a program for realizing a function of controlling the transceiver unit applied to a mobile radio communication system adopting a full duplex system of optical transmission (transmission / reception single-core bidirectional) having means for measuring the transmission delay amount of
A function of storing transmission rate information of the optical signal according to the wavelength of the optical signal in the upstream direction, which is a direction from the transceiver unit transmitting through the optical fiber to the radio base station unit, is realized. program.

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