CN108270607B - Microwave communication method and device - Google Patents
Microwave communication method and device Download PDFInfo
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- CN108270607B CN108270607B CN201710001226.7A CN201710001226A CN108270607B CN 108270607 B CN108270607 B CN 108270607B CN 201710001226 A CN201710001226 A CN 201710001226A CN 108270607 B CN108270607 B CN 108270607B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
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Abstract
The invention discloses a method and a device for microwave communication, wherein XPIC groups are formed in equipment of multi-transmitting and multi-receiving microwave transmission equipment, MIMO groups are formed among the equipment, and when service transmission is interrupted due to interference or attenuation, a fault service unit is actively recovered according to a preset time period, namely, the invention can actively recover the fault service unit under the condition that one or more service units have faults, so as to recover the fault service after the normal transmission capability is recovered, thereby avoiding the problem that other services are unavailable due to the fault of one or more service units in the prior art.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for microwave communications.
Background
Microwave communication is widely used as a communication means at present, frequency point resources are more and more urgent due to rapid increase of services and bandwidths, and a polarization interference cancellation technology applying XPIC and MIMO can apply a frequency point to simultaneously transmit four paths of services with different polarization directions so as to avoid mutual interference, thereby increasing the channel capacity while improving the use efficiency of the frequency point.
XPIC cross-polarization interference cancellation is a technique used in conjunction with CCDP. CCDP utilizes two orthogonal polarized waves to transmit signals to realize the doubling of transmission capacity, and XPIC is used for eliminating the cross interference between two polarized waves. Ideally, 2 co-frequency microwave signals of CCDP are orthogonal signals, and no interference occurs between the two signals, but under actual engineering conditions, no matter how orthogonal the two signals are, the interference between the signals inevitably exists due to the influence of deterioration of the antenna XPD and channel transmission. To counteract these interferences, it is necessary to use XPIC techniques. The basic principle of XPIC technology is to receive signals from both horizontal and vertical polarization directions and to process both to recover the original signal from the interfered signal.
Fig. 1 is a schematic diagram of CCDP and XPIC, a Modem Horizontal and a Modem Vertical respectively send two services marked as a solid line and a dotted line, the two services use orthogonal two-path signal transmission through CCDP, and an opposite end receives two interfering signals, then filters and separates the interfering signals, and cancels the interfering signals with the other signal to recover the original two services.
The Multiple-Input Multiple-Output (MIMO) technology is to use Multiple transmitting antennas and Multiple receiving antennas at a transmitting end and a receiving end, so that signals are transmitted and received through the Multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. The multi-antenna multi-transmission multi-receiving system can fully utilize space resources, realize multi-transmission and multi-reception through a plurality of antennas, and improve the system channel capacity by times under the condition of not increasing frequency spectrum resources and antenna transmitting power. MIMO techniques can be broadly divided into two categories: space diversity and space multiplexing, and the system adopts a space diversity method.
Fig. 2 is a schematic diagram of the principle of MIMO, where a transmitting end maps signals to be transmitted to multiple antennas through space-time mapping and transmits the signals, and a receiving end performs space-time decoding on the signals received by the antennas to recover the signals transmitted by the transmitting end.
In the MIMO + XPIC networking, each air interface channel receives components of four polarized signals from an opposite terminal, and when the MIMO + XPIC method is used for transmission, if one path (or two paths or three paths) of service units have faults or receive signals become poor due to weather reasons, so that the reception is abnormal, and four paths of service units cannot be used under the condition that offset signals cannot be provided for the other three paths of service units.
Disclosure of Invention
The invention provides a method and a device for microwave communication, which aim to solve the problem that in the prior art, one or more paths of service units fail to cause other paths of services to be unavailable.
One aspect of the present invention provides a method for microwave communication, including:
arranging at least two multi-sending and multi-receiving microwave transmission devices, enabling the devices of the multi-sending and multi-receiving microwave transmission devices to form an XPIC group and enabling devices to form an MIMO group;
when the service transmission is interrupted, actively recovering the fault service unit according to a preset time period, if the service recovery is successful, ending, otherwise, waiting for the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit.
Further, when there is one failed service unit, actively recovering the failed service unit according to a preset time period, specifically including:
closing the fault service unit, and closing an XPIC counteracting function service unit and an MIMO counteracting function service unit of the fault service unit;
and opening a fault service sending unit for timing recovery according to a preset time period generated by a time sequence generation algorithm until the service recovery is successful.
Further, the closing the faulty service unit specifically includes: when the service of the fault service unit is continuously unlocked for a first preset time, closing the fault service unit;
the step of opening the fault service sending unit for timing recovery according to a preset time period generated by the time sequence generating algorithm specifically includes:
according to a preset time period generated by a time sequence generation algorithm, after the preset time period is up, starting a radio frequency sending unit where a fault service unit is located for a second preset time, informing a partner transmission unit of the fault service unit to adjust the lock-losing detection time to a third preset time, if the partner transmission unit is in a locking state after the second preset time is up, successfully recovering the fault service, clearing a timer, if the second preset time is up, failing to recover the fault service when the partner transmission unit is in the lock-losing state, closing the fault service unit, and if not, continuing to try to recover until the service is successfully recovered after waiting for the next preset time period;
wherein the third predetermined time is greater than the second predetermined time;
when the failure service unit is a service unit with an MIMO offset function, the partner transmission unit is a service unit with another MIMO offset function, when the failure service unit is a service unit with an XPIC offset function, the partner transmission unit is a service unit with another XPIC offset function.
Further, when the faulty service unit is a service unit with two MIMO cancellation functions, the faulty service unit is actively recovered according to a preset time period, which specifically includes:
closing the fault service unit with the MIMO offset function which fails first, opening the fault service unit with the MIMO offset function which fails later, and closing the MIMO offset function service unit of the fault service unit;
performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault MIMO offset function to try active recovery, if the service recovery is successful, ending, and if not, waiting for the next time period to continue trying recovery until the service recovery is successful;
when the failure service unit is a service unit with two XPIC offset functions, the failure service unit is actively recovered according to a preset time period, and the method specifically comprises the following steps:
closing the failure service unit with the XPIC offset function which fails firstly, opening the failure service unit with the XPIC offset function which fails later, and closing the XPIC offset function service unit of the failure service unit;
and performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault XPIC cancellation function to try active recovery, finishing if the service recovery is successful, or waiting for the next time period to continuously try recovery until the service recovery is successful.
When the failure service unit is a service unit with an XPIC cancellation function and a service unit with an MIMO cancellation function, the failure service unit is actively recovered according to a preset time period, and the method specifically comprises the following steps:
a failure service unit with a failure XPIC offset function and a failure service unit with a failure MIMO offset function are closed, an XPIC offset function service unit with a failure XPIC offset function and an MIMO offset function service unit with a failure MIMO offset function are closed;
and timing recovery is carried out according to a preset time period generated by a time sequence generation algorithm, a failed service unit with a failed XPIC (x-ray integrated circuit) offset function and a failed service unit with a failed MIMO offset function are opened to try to actively recover, if the service recovery is successful, the operation is finished, otherwise, the recovery is continuously tried for the next time period until the service recovery is successful.
Further, the attempting of active recovery by opening the failed service unit with the failed XPIC cancellation function and the failed service unit with the failed MIMO cancellation function specifically includes:
and opening the fault service unit with the failed XPIC cancellation function and the fault service unit with the failed MIMO cancellation function, and synchronously recovering the fault service unit with the failed XPIC cancellation function and the fault service unit with the failed MIMO cancellation function.
In another aspect, the present invention provides an apparatus for microwave communication, including:
the setting unit is used for setting at least one multi-transmitting and multi-receiving microwave transmission device, so that XPIC groups are formed in the devices of the multi-transmitting and multi-receiving microwave transmission devices, and MIMO groups are formed among the devices;
the recovery unit is used for actively recovering the fault service unit according to a preset time period when service transmission is interrupted, ending the operation if the service recovery is successful, or waiting the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit.
Further, the recovery unit is further configured to, when there is one failed service unit, close the failed service unit, and close an XPIC cancellation function service unit and an MIMO cancellation function service unit of the failed service unit; and opening a fault service sending unit for timing recovery according to a preset time period generated by a time sequence generation algorithm until the service recovery is successful.
Further, the recovery unit is further configured to, after the service of the failed service unit is continuously out-of-lock for a first predetermined time, close the failed service unit; according to a preset time period generated by a time sequence generation algorithm, after the preset time period is up, starting a radio frequency sending unit where a fault service unit is located for a second preset time, informing a partner transmission unit of the fault service unit to adjust the lock-losing detection time to a third preset time, if the partner transmission unit is in a locking state after the second preset time is up, successfully recovering the fault service, clearing a timer, if the second preset time is up, failing to recover the fault service when the partner transmission unit is in the lock-losing state, closing the fault service unit, and if not, continuing to try to recover until the service is successfully recovered after waiting for the next preset time period; wherein the third predetermined time is greater than the second predetermined time; when the failure service unit is a service unit with an MIMO offset function, the partner transmission unit is a service unit with another MIMO offset function, when the failure service unit is a service unit with an XPIC offset function, the partner transmission unit is a service unit with another XPIC offset function.
Further, the recovery unit is further configured to, when the failed service unit is a service unit with two MIMO cancellation functions, close the failed service unit with the MIMO cancellation function that fails first, open the failed service unit with the MIMO cancellation function that fails later, and close the MIMO cancellation function service unit with the failed service unit; performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault MIMO offset function to attempt active recovery, if the service recovery is successful, ending, otherwise, waiting for the next time period to continue to attempt recovery until the service recovery is successful; when the fault service unit is a service unit with two XPIC offset functions, the fault service unit with the XPIC offset function which fails first is closed, the fault service unit with the XPIC offset function which fails later is opened, and the XPIC offset function service unit with the fault service unit is closed; and performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault XPIC offset function to try to actively recover, finishing if the service recovery is successful, or waiting for the next time period to continuously try to recover until the service recovery is successful. When the failure service unit is a service unit with an XPIC counteracting function and a service unit with an MIMO counteracting function, the failure service unit with the XPIC counteracting function and the failure service unit with the MIMO counteracting function are closed, the XPIC counteracting function service unit with the failure service unit with the XPIC counteracting function and the MIMO counteracting function service unit with the failure service unit with the MIMO counteracting function are closed; and timing recovery is carried out according to a preset time period generated by a time sequence generation algorithm, a failed service unit with a failed XPIC (x-ray integrated circuit) offset function and a failed service unit with a failed MIMO offset function are opened to try to actively recover, if the service recovery is successful, the operation is finished, otherwise, the recovery is continuously tried for the next time period until the service recovery is successful.
Furthermore, the recovery unit is further configured to open the failed service unit with the failed XPIC cancellation function and the failed service unit with the failed MIMO cancellation function, and perform synchronous recovery on the failed service unit with the failed XPIC cancellation function and the failed service unit with the failed MIMO cancellation function.
The invention has the following beneficial effects:
the invention makes the equipment of the multi-transmitting and multi-receiving microwave transmission equipment form an XPIC group, and makes MIMO groups among the equipment, and actively recovers the fault service unit according to the preset time period when the service transmission is interrupted due to interference or attenuation, that is, the invention can actively recover the fault service unit under the condition that one or more service units have faults, so as to recover the fault service after the normal transmission capability is recovered, thereby avoiding the problem that some service unit or a plurality of service units have faults and other services are unavailable in the prior art.
Drawings
FIG. 1 is a schematic diagram of the working principle of the conventional CCDP and XPIC;
fig. 2 is a schematic diagram of the operation principle of the existing MIMO;
FIG. 3 is a schematic flowchart of a method for performing microwave communication by applying XPIC and MIMO technology according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an actual application scenario of the MIMO + XPIC technology of the present invention;
FIG. 5 is a schematic diagram of transmission of interference signals of one hop of MIMO + XPIC networking air interface of the present invention;
FIG. 6 is a flow chart of a failure triggered out-of-lock under MIMO;
FIG. 7 is a MIMO + XPIC coordinated recovery flow chart;
fig. 8 is a schematic structural diagram of an apparatus for microwave communication using XPIC and MIMO technology according to an embodiment of the present invention.
Detailed Description
In order to solve the problem that some service unit or multi-service unit fails to cause other services to be unavailable in the prior art, the invention provides a method and a device for performing microwave communication by applying a Cross-polarization Interference canceller (XPIC) and a Multiple-Input Multiple-Output (MIMO) technology. The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Method embodiment
An embodiment of the present invention provides a method for microwave communication, and referring to fig. 3, the method includes:
s301, setting at least two multi-transmitting and multi-receiving microwave transmission devices, enabling the devices of the multi-transmitting and multi-receiving microwave transmission devices to form an XPIC group and enabling devices to form an MIMO group;
s302, when the service transmission is interrupted, actively recovering a fault service unit according to a preset time period, if the service recovery is successful, ending, and if not, waiting for the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit.
That is, the present invention makes the equipment of the multiple-transmitting multiple-receiving microwave transmission equipment form an XPIC group, and makes the equipment form an MIMO group, and when the service transmission is interrupted due to interference or attenuation, the failure service unit is actively recovered according to the preset time period, that is, the present invention can make the active recovery of the failure service unit under the condition that one or several service units have failure, so as to recover the failure service after the failure recovers the normal transmission capability, thereby avoiding the problem that some service unit or multiple service units have failure and other services are unavailable in the prior art.
Fig. 4 is a schematic diagram of an actual application scenario of the MIMO + XPIC technology of the present invention, and as shown in fig. 4, the present invention uses two 2T2R (i.e., two-transmitter and two-receiver) microwave transmission devices, and the devices form an XPIC group, and a MIMO group is formed between the devices, so as to form a MIMO + XPIC network. Each antenna is a dual-polarized antenna, and the combiner is used for connecting two optical fiber collecting and distributing units (ODUs) and can also be connected with an All-Outdoor Unit (AOU) device, and the Cross Polarization Isolation (Cross Polarization Isolation) XPI value can be manually adjusted to ensure that an XPIC group link normally works. The two antennas at the same end obtain an optimal distance through a theoretical calculation formula to form an MIMO group, and the distance of the antennas can be adjusted to adjust a proper ETA value to ensure that a link of the MIMO group works normally.
In the MIMO + XPIC networking, each air interface channel receives components from four polarized signals at the opposite end, and when the MIMO + XPIC method is applied to transmission, if a single board of one (or two or three) service fails or receives signals due to weather deterioration, which results in abnormal reception and failure to provide cancellation signals to the other three services, the situation that the four services are unavailable is found.
The invention configures four paths of services with different polarization directions into four logic transmission units, and each transmission unit corresponds to one path of service. The four polarization directions are respectively called a Primary polarization direction service unit Primary, a Secondary polarization direction service unit Secondary, a Spatial Primary polarization direction service unit Spatial Primary and a Spatial Secondary polarization direction service unit Spatial Secondary, based on hardware and physical realization, the Primary polarization direction service unit and the Secondary polarization direction service unit, as well as the Spatial Primary polarization direction service unit and the Spatial Secondary polarization direction service unit are XPIC signal interference cancellation, the Primary polarization direction service unit and the Spatial Primary polarization direction service unit. And the secondary polarization direction service unit and the spatial secondary polarization direction service unit are MIMO signal interference cancellation, and they are mutually included and mutually independent, and fig. 5 is a schematic transmission diagram of interference signals of an air interface one hop of a MIMO + XPIC networking. Assuming that when the service unit in the main polarization direction detects that the current service fails, the service unit in the main polarization direction automatically closes the service sending unit to prevent the service sending unit from interfering with normal operation in the directions of the service unit in the secondary polarization direction and the service unit in the space main polarization direction, simultaneously, an XPIC (X-ray integrated circuit) cancellation function in the direction of the service unit in the secondary polarization direction and an MIMO (multiple input multiple output) cancellation function in the direction of the service unit in the space main polarization direction are closed, after the service sending unit is closed by the service unit in the main polarization direction, the service sending unit is opened according to a time sequence generated by a specific algorithm to try recovery, if the service recovery success process is terminated, if the recovery failure is closed, the sending unit is continuously tried to recover until the service recovery succeeds at the next time point.
After the setting is finished, each service unit has the following attributes:
polarization properties: the polarization attribute comprises four main polarization direction service units, a secondary polarization direction service unit, a space main polarization direction service unit and a space secondary polarization direction service unit;
partner attributes: the partner attribute is the position information of the transmission unit of another service with different polarization directions, and is used for the communication between the transmission units, and the partner attribute of the invention has two kinds: XPIC buddy attributes and MIMO buddy attributes;
service health attributes: the business health attributes of the present invention include both healthy and unhealthy states.
In specific implementation, when there is one failed service unit, the active recovery of the failed service unit is performed according to a preset time period, which specifically includes:
closing the fault service unit, and closing an XPIC counteracting function service unit and an MIMO counteracting function service unit of the fault service unit;
and opening a fault service sending unit for timing recovery according to a preset time period generated by a time sequence generation algorithm until the service recovery is successful.
Further, the closing of the faulty service unit specifically includes: when the service of the fault service unit is continuously unlocked for a first preset time, closing the fault service unit;
in specific implementation, the invention closes the fault service unit after the service of the fault service unit is continuously unlocked for 2 seconds.
The method for starting the fault service sending unit to perform timing recovery according to the preset time period generated by the time sequence generation algorithm specifically comprises the following steps:
according to a preset time period generated by a time sequence generation algorithm, after the preset time period is up, starting a radio frequency sending unit where a fault service unit is located for a second preset time, informing a partner transmission unit of the fault service unit to adjust the lock loss detection time to a third preset time, after the second preset time is up, if the partner transmission unit is in a locking state, successfully recovering the fault service, clearing a timer, if the second preset time is up, if the partner transmission unit fails to recover the fault service in the lock loss state, closing the fault service unit, and otherwise, after the next preset time period is up, continuously trying to recover until the service is successfully recovered;
wherein the third predetermined time is greater than the second predetermined time;
for example, when the intermediate frequency receiving unit where the transmission unit is located detects that the path of service is continuously unlocked for a period of time 2s (that is, the path of service is always in an unlocked state for the first predetermined time, and the transmission unit considers that the current service is faulty), the radio frequency transmitting unit corresponding to the transmission unit is turned off. The times {10 × 1000,30 × 1000,60 × 1000,2 × 60 × 1000,5 × 60 × 1000,12 × 60 × 1000,30 × 60 × 1000,72 × 60 × 1000,2 × 60 × 1000} produced according to the time series generation algorithm initiate timing recovery.
It should be noted that, in order to save the energy wasted in recovery, the present invention employs a gradually increasing time sequence for timing recovery.
And trying to open a radio frequency sending unit 5s (second preset time) where the transmission unit is located after the timing is up, informing a partner transmission unit of adjusting the lock-losing detection time to 10s (the lock-losing state is always maintained for the third preset time, the transmission unit considers that the current service is in a fault), if the partner transmission unit is in a locking state after the timing is up, successfully clearing a timer after the fault service is recovered, if the fault service is recovered and fails when the lock-losing state is maintained for the partner transmission unit after the timing is up for 5s, closing the radio frequency sending unit, restarting the timing according to a time sequence to wait for recovering from the next attempt, and opening the radio frequency sending unit after the opposite-end transmission unit detects the locking.
When the failure service unit is a service unit with an MIMO offset function, the partner transmission unit is a service unit with another MIMO offset function, when the failure service unit is a service unit with an XPIC offset function, the partner transmission unit is a service unit with another XPIC offset function.
Further, when the faulty service unit is a service unit with two MIMO cancellation functions, the present invention actively recovers the faulty service unit according to a preset time period, specifically including:
closing the fault service unit with the MIMO offset function which fails firstly, opening the fault service unit with the MIMO offset function which fails later, and closing the MIMO offset function service unit of the fault service unit; specifically, in the embodiment of the present invention, when the failed service unit is two service units with MIMO cancellation function, the service unit with MIMO cancellation function that failed first is closed, the service unit with MIMO cancellation function that failed later is opened, and meanwhile, the service unit with MIMO cancellation function that failed (the failed service unit includes the two failed service units with MIMO cancellation function that are assumed to be failed) is closed. Then, timing recovery is carried out according to a preset time period generated by a time sequence generation algorithm, a fault service unit with a fault MIMO offset function is opened to try active recovery, if the service recovery is successful, the operation is finished, otherwise, the recovery is continuously tried after waiting for the next time period until the service recovery is successful;
when the failure service unit is a service unit with two XPIC offset functions, the failure service unit is actively recovered according to a preset time period, and the method specifically comprises the following steps:
closing the fault service unit with the XPIC offset function which fails firstly, opening the fault service unit with the XPIC offset function which fails later, and closing the XPIC offset function service unit of the fault service unit; specifically, in the embodiment of the present invention, when the failure service unit is a service unit with two XPIC cancellation functions, the service unit with the XPIC cancellation function that failed first is closed, the service unit with the MIMO cancellation function that failed later is opened, and meanwhile, the service unit with the XPIC cancellation function that failed the service unit (the failure service unit includes the above-mentioned two service units with the XPIC cancellation functions that are assumed to be failed) is closed. And then, timing recovery is carried out according to a preset time period generated by a time sequence generation algorithm, a fault service unit with a fault XPIC cancellation function is opened to try active recovery, if the service recovery is successful, the process is ended, otherwise, the recovery is continuously tried after the next time period until the service recovery is successful.
When the failure service unit is a service unit with an XPIC cancellation function and a service unit with an MIMO cancellation function, the failure service unit is actively recovered according to a preset time period, and the method specifically comprises the following steps:
a failure service unit with a failure XPIC offset function and a failure service unit with a failure MIMO offset function are closed, an XPIC offset function service unit with a failure XPIC offset function and an MIMO offset function service unit with a failure MIMO offset function are closed;
and performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault XPIC (X-ray correlation integrated circuit) counteracting function and a fault service unit with a fault MIMO counteracting function to try to actively recover, finishing if the service recovery is successful, or waiting for the next time period to continuously try to recover until the service recovery is successful.
That is to say, the main path signal and the interference signal of the MIMO group have substantially the same strength, and a failure in one direction may cause a substantially simultaneous interruption in the other direction, in order to prevent the influence of the failure in one direction on the other direction, when the duration of the failure in one direction reaches 2s first, the PA is turned off first, and the PA is not turned off in the other direction, and simultaneously, the MIMO cancellation functions in the two directions are turned off to prevent mutual interference, as shown in fig. 6.
Specifically, when the service unit with the main polarization direction fails, the service unit with the main polarization direction in space is inevitably interrupted, so that the method and the device adopt the steps that after the failure duration time of the service unit with the main polarization direction reaches the first preset time, the service unit with the main polarization direction in space is firstly closed, but the service unit with the main polarization direction in space is opened, and simultaneously, the MIMO cancellation functions in two directions of the service unit with the main polarization direction in space and the service unit with the main polarization direction in space are closed, so that mutual interference is prevented.
For example, suppose that a directional failure of a service unit in a main polarization direction is unlocked, and further a directional unlocking of the service unit in the main polarization direction in space is caused, when the directional unlocking of the service unit in the main polarization direction reaches 2s, the PA is turned off to prevent interference to a partner, when the directional unlocking of the service unit in the main polarization direction in space reaches 2s, it is found that the direction of the service unit in the main polarization direction is turned off, the PA of the service unit in the main polarization direction is turned on, and meanwhile, it is detected that both the service unit and the partner are in a state of unlocking, and in order to facilitate recovery, the MIMO cancellation function is turned off to prevent an interference signal from the partner.
In specific implementation, the attempting of actively recovering the failed service unit with the failed XPIC cancellation function and the failed service unit with the failed MIMO cancellation function according to the embodiment of the present invention specifically includes:
and opening the fault service unit with the failed XPIC cancellation function and the fault service unit with the failed MIMO cancellation function, and synchronously recovering the fault service unit with the failed XPIC cancellation function and the fault service unit with the failed MIMO cancellation function.
The MIMO and XPIC abnormal flow is mutually independent, when a fault occurs in a certain direction, the MIMO module and the XPIC module can close the PA at the same time, and close the MIMO and XPIC offset signals of respective partners, in order to ensure that the link can be quickly recovered after the fault disappears, the MIMO and XPIC need to be actively recovered at the same time, the invention adopts a linkage recovery mechanism, when the XPIC module is actively recovered, the MIMO module monitors the XPIC module to synchronously recover, so that the link can be quickly recovered to be normal, as shown in figure 7, the MIMO + XPIC linkage recovery comprises:
supposing that when the XPIC and the MIMO are both in an automatic mode and the main polarization direction service unit direction is unlocked for a long time, the fault of the main polarization direction service unit direction is recovered, and the PA is tried to be opened; when an XPIC module starts to try to open a PA, an MIMO module starts to try to open the PA in a linkage manner, a secondary polarization direction service unit direction tries to recover an XPIC offset function, a space main polarization direction service unit direction starts to try to recover the MIMO offset function, the flow is finished if the recovery is successful, if the recovery is unsuccessful, the XPIC module continues to recover, and the MIMO module continues to be in linkage recovery.
It should be noted that each of the predetermined times and the time periods described in the present invention can be arbitrarily set according to actual needs.
In the MIMO + XPIC technology of the invention, the XPIC and the MIMO mode can be respectively configured, a faster recovery speed can be achieved under the XPIC forced MIMO automatic mode in the actual measurement, and the MIMO and the XPIC can realize synchronous recovery.
In summary, the present invention can avoid the interference to the other several services when one or several services have a fault, ensure the normal transmission of the remaining link services, ensure the transmission capacity to the maximum extent, and recover the fault service after the fault recovers the normal transmission capacity.
Apparatus embodiment
An embodiment of the present invention provides a device for microwave communication, and referring to fig. 8, the device includes: the setting unit is used for setting at least two multi-transmitting and multi-receiving microwave transmission devices, so that XPIC groups are formed in the devices of the multi-transmitting and multi-receiving microwave transmission devices, and MIMO groups are formed among the devices; the recovery unit is used for actively recovering the fault service unit according to a preset time period when service transmission is interrupted, ending the operation if the service recovery is successful, or waiting the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit.
That is, the present invention makes the inside of the equipment of the multi-transmitting multi-receiving microwave transmission equipment form an XPIC group through the setting unit, and makes the MIMO group among the equipment, and when the service transmission is interrupted due to interference or attenuation, the failure service unit is actively recovered through the recovery unit according to the preset time period, that is, the present invention can actively recover the failure service unit under the condition that one or more service units have a failure, so as to recover the failure service after the failure recovers the normal transmission capability, thereby avoiding the problem that some service unit or multiple service units have a failure and other services are unavailable in the prior art.
The invention configures four paths of services with different polarization directions into four logic transmission units, and each transmission unit corresponds to one path of service. The four polarization directions are respectively called a Primary polarization direction service unit Primary, a Secondary polarization direction service unit Secondary, a Spatial Primary polarization direction service unit Spatial Primary and a Spatial Secondary polarization direction service unit Spatial Secondary, based on hardware and physical realization, the Primary polarization direction service unit and the Secondary polarization direction service unit, as well as the Spatial Primary polarization direction service unit and the Spatial Secondary polarization direction service unit are XPIC signal interference cancellation, the Primary polarization direction service unit and the Spatial Primary polarization direction service unit. And the secondary polarization direction service unit and the spatial secondary polarization direction service unit are MIMO signal interference cancellation, and they are mutually included and mutually independent, and fig. 5 is a schematic transmission diagram of interference signals of an air interface one hop of a MIMO + XPIC networking. If the main polarization direction service unit detects that the current service has a fault, the main polarization direction service unit automatically closes the service sending unit to prevent the service sending unit from interfering the normal work of the direction of the secondary polarization direction service unit and the direction of the space main polarization direction service unit, simultaneously, the XPIC counteracting function of the direction of the secondary polarization direction service unit and the MIMO counteracting function of the direction of the space main polarization direction service unit are closed, after the main polarization direction service unit closes the service sending unit, the service sending unit is opened according to a time sequence generated by a specific algorithm to try to recover, if the service recovery success process is terminated, if the recovery failure closes the sending unit, the recovery is continued to try to recover until the service recovery succeeds at the next time point.
After the setting, each service unit has the following attributes:
polarization property: the polarization attribute comprises four main polarization direction service units, a secondary polarization direction service unit, a space main polarization direction service unit and a space secondary polarization direction service unit;
partner attributes: the partner attribute is the position information of the transmission unit of another path of service with different polarization directions, and is used for the communication between the transmission units, and the partner attribute of the invention has two kinds of partner attributes: XPIC partner attributes and MIMO partner attributes;
service health attributes: the business health attributes of the present invention include both healthy and unhealthy states.
Further, the recovery unit of the present invention is further configured to, when there is one failed service unit, close the failed service unit, and close an XPIC cancellation function service unit and an MIMO cancellation function service unit of the failed service unit; and opening a fault service sending unit for timing recovery according to a preset time period generated by a time sequence generation algorithm until the service recovery is successful.
In specific implementation, the recovery unit is further configured to, after the service of the failed service unit is continuously unlocked for a first predetermined time, close the failed service unit; according to a preset time period generated by a time sequence generation algorithm, after the preset time period is up, starting a radio frequency sending unit where a fault service unit is located for a second preset time, informing a partner transmission unit of the fault service unit to adjust the lock loss detection time to a third preset time, after the second preset time is up, if the partner transmission unit is in a locking state, successfully recovering the fault service, clearing a timer, if the second preset time is up, if the partner transmission unit fails to recover the fault service in the lock loss state, closing the fault service unit, and otherwise, after the next preset time period is up, continuously trying to recover until the service is successfully recovered; wherein the third predetermined time is greater than the second predetermined time; when the failure service unit is a service unit with an MIMO offset function, the partner transmission unit is a service unit with another MIMO offset function, when the failure service unit is a service unit with an XPIC offset function, the partner transmission unit is a service unit with another XPIC offset function.
For example, when the intermediate frequency receiving unit where the transmission unit is located detects that the path of service is continuously unlocked for a period of time 2s (that is, the path of service is always in an unlocked state for the first predetermined time, and the transmission unit considers that the current service is faulty), the radio frequency transmitting unit corresponding to the transmission unit is turned off. The times produced according to the time series generation algorithm {10 x 1000,30 x 1000,60 x 1000,2 x 60 x 1000,5 x 60 x 1000,12 x 60 x 1000,
30 x 60 x 1000,72 x 60 x 1000,2 x 60 x 1000 start timing recovery.
It should be noted that, in order to save the energy wasted in recovery, the present invention employs a gradually increasing time sequence for timing recovery.
And trying to open a radio frequency sending unit 5s (second preset time) where the transmission unit is located after the timing is up, informing a partner transmission unit of adjusting the lock-losing detection time to 10s (the lock-losing state is always maintained for the third preset time, the transmission unit considers that the current service is in a fault), if the partner transmission unit is in a locking state after the timing is up, successfully clearing a timer after the fault service is recovered, if the fault service is recovered and fails when the lock-losing state is maintained for the partner transmission unit after the timing is up for 5s, closing the radio frequency sending unit, restarting the timing according to a time sequence to wait for recovering from the next attempt, and opening the radio frequency sending unit after the opposite-end transmission unit detects the locking.
Furthermore, the recovery unit of the present invention is further configured to, when the failure service unit is a service unit with two MIMO cancellation functions, close the failure service unit with the MIMO cancellation function that fails first, open the failure service unit with the MIMO cancellation function that fails later, and close the MIMO cancellation function service unit with the failure service unit; performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault MIMO offset function to attempt active recovery, if the service recovery is successful, ending, otherwise, waiting for the next time period to continue to attempt recovery until the service recovery is successful; when the failure service unit is a service unit with two XPIC offset functions, the failure service unit with the XPIC offset function which fails firstly is closed, the failure service unit with the XPIC offset function which fails later is opened, and the XPIC offset function service unit with the failure service unit is closed; and performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault XPIC offset function to try to actively recover, finishing if the service recovery is successful, or waiting for the next time period to continuously try to recover until the service recovery is successful. When the failure service unit is a service unit with XPIC offset function and a service unit with MIMO offset function, the failure service unit with XPIC offset function and the failure service unit with MIMO offset function are closed, the XPIC offset function service unit with XPIC offset function and the MIMO offset function service unit with MIMO offset function are closed; and performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault XPIC (X-ray correlation integrated circuit) counteracting function and a fault service unit with a fault MIMO counteracting function to try to actively recover, finishing if the service recovery is successful, or waiting for the next time period to continuously try to recover until the service recovery is successful.
Furthermore, the recovery unit of the present invention is further configured to open the failed service unit with the failed XPIC cancellation function and the failed service unit with the failed MIMO cancellation function, and perform synchronous recovery on the failed service unit with the failed XPIC cancellation function and the failed service unit with the failed MIMO cancellation function.
The related content in the embodiments of the present invention can be understood by referring to the apparatus embodiments and the method embodiments, and will not be described herein again.
The invention can at least achieve the following beneficial effects:
the invention makes the equipment of the multi-transmitting and multi-receiving microwave transmission equipment form an XPIC group, and the equipment forms an MIMO group, when the service transmission is interrupted due to interference or attenuation, the failure service unit is actively recovered according to the preset time period, that is, the invention can actively recover the failure service unit under the condition that one or more paths of service units have failure, so as to recover the failure service after the failure recovers the normal transmission capability, thereby avoiding the problem that some path or a plurality of paths of service units have failure and other paths of service are unavailable in the prior art.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and that the scope of the present invention is not limited to the embodiments disclosed.
Claims (6)
1. A method of microwave communication, comprising:
arranging at least two multi-sending and multi-receiving microwave transmission devices, enabling the devices of the multi-sending and multi-receiving microwave transmission devices to form an XPIC group and enabling devices to form an MIMO group;
when the service transmission is interrupted, actively recovering the fault service unit according to a preset time period, if the service recovery is successful, ending, and if not, waiting for the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit;
when the number of the failed service units is one, actively recovering the failed service units according to a preset time period, specifically comprising:
closing the fault service unit, and closing an XPIC (X-character integrated circuit) offset function service unit and an MIMO offset function service unit of the fault service unit;
opening a fault service sending unit for timing recovery according to a preset time period generated by a time sequence generation algorithm until the service recovery is successful;
wherein, the closing the faulty service unit specifically includes: when the service of the fault service unit is continuously unlocked for a first preset time, closing the fault service unit;
the step of opening the fault service sending unit for timing recovery according to a preset time period generated by the time sequence generating algorithm specifically includes:
according to a preset time period generated by a time sequence generation algorithm, after the preset time period is up, starting a radio frequency sending unit where a fault service unit is located for a second preset time, informing a partner transmission unit of the fault service unit to adjust the lock loss detection time to a third preset time, after the second preset time is up, if the partner transmission unit is in a locking state, successfully recovering the fault service, clearing a timer, if the second preset time is up, if the partner transmission unit fails to recover the fault service in the lock loss state, closing the fault service unit, and otherwise, after the next preset time period is up, continuously trying to recover until the service is successfully recovered;
wherein the third predetermined time is greater than the second predetermined time;
when the fault service unit is a service unit with MIMO offset function, the partner transmission unit is a service unit with another MIMO offset function, and when the fault service unit is a service unit with XPIC offset function, the partner transmission unit is a service unit with another XPIC offset function.
2. A method of microwave communication, comprising:
arranging at least two multi-transmitting and multi-receiving microwave transmission devices, so that XPIC groups are formed in the devices of the multi-transmitting and multi-receiving microwave transmission devices, and MIMO groups are formed among the devices;
when the service transmission is interrupted, actively recovering the fault service unit according to a preset time period, if the service recovery is successful, ending, otherwise, waiting for the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit;
when the failure service unit is a service unit with two MIMO cancellation functions, actively recovering the failure service unit according to a preset time period, specifically including:
closing the fault service unit with the MIMO offset function which fails firstly, opening the fault service unit with the MIMO offset function which fails later, and closing the MIMO offset function service unit of the fault service unit;
performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault MIMO offset function to attempt active recovery, if the service recovery is successful, ending, otherwise, waiting for the next time period to continue to attempt recovery until the service recovery is successful;
when the failure service unit is a service unit with two XPIC offset functions, the failure service unit is actively recovered according to a preset time period, and the method specifically comprises the following steps:
closing the failure service unit with the XPIC offset function which fails firstly, opening the failure service unit with the XPIC offset function which fails later, and closing the XPIC offset function service unit of the failure service unit;
timing recovery is carried out according to a preset time period generated by a time sequence generation algorithm, a fault service unit with a fault XPIC offset function is opened to try active recovery, if the service recovery is successful, the operation is finished, otherwise, the recovery is continuously tried in the next time period until the service recovery is successful;
when the failure service unit is a service unit with an XPIC cancellation function and a service unit with an MIMO cancellation function, the failure service unit is actively recovered according to a preset time period, and the method specifically comprises the following steps:
a failure service unit with a failure XPIC offset function and a failure service unit with a failure MIMO offset function are closed, an XPIC offset function service unit with a failure XPIC offset function and an MIMO offset function service unit with a failure MIMO offset function are closed;
and performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault XPIC (X-ray correlation integrated circuit) counteracting function and a fault service unit with a fault MIMO counteracting function to try to actively recover, finishing if the service recovery is successful, or waiting for the next time period to continuously try to recover until the service recovery is successful.
3. The method according to claim 2, wherein the opening of the failed service unit of the failed XPIC cancellation function and the failed service unit of the failed MIMO cancellation function attempts active recovery, specifically includes:
and opening the fault service unit with the failed XPIC counteracting function and the fault service unit with the failed MIMO counteracting function, and synchronously recovering the fault service unit with the failed XPIC counteracting function and the fault service unit with the failed MIMO counteracting function.
4. An apparatus for microwave communication, comprising:
the setting unit is used for setting at least two multi-transmitting and multi-receiving microwave transmission devices, so that XPIC groups are formed in the devices of the multi-transmitting and multi-receiving microwave transmission devices, and MIMO groups are formed among the devices;
the recovery unit is used for actively recovering the fault service unit according to a preset time period when service transmission is interrupted, ending the operation if the service recovery is successful, or waiting the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit;
wherein, the recovery unit is further configured to, when there is one failed service unit, close the failed service unit, and close an XPIC cancellation function service unit and an MIMO cancellation function service unit of the failed service unit; opening a fault service sending unit for timing recovery according to a preset time period generated by a time sequence generation algorithm until the service recovery is successful;
the recovery unit is further configured to close the failed service unit after the service of the failed service unit is continuously out-of-lock for a first predetermined time; according to a preset time period generated by a time sequence generation algorithm, after the preset time period is up, starting a radio frequency sending unit where a fault service unit is located for a second preset time, informing a partner transmission unit of the fault service unit to adjust the lock loss detection time to a third preset time, after the second preset time is up, if the partner transmission unit is in a locking state, successfully recovering the fault service, clearing a timer, if the second preset time is up, if the partner transmission unit fails to recover the fault service in the lock loss state, closing the fault service unit, and otherwise, after the next preset time period is up, continuously trying to recover until the service is successfully recovered; wherein the third predetermined time is greater than the second predetermined time; when the failure service unit is a service unit with an MIMO offset function, the partner transmission unit is a service unit with another MIMO offset function, when the failure service unit is a service unit with an XPIC offset function, the partner transmission unit is a service unit with another XPIC offset function.
5. An apparatus for microwave communication, comprising:
the setting unit is used for setting at least two multi-transmitting and multi-receiving microwave transmission devices, so that XPIC groups are formed in the devices of the multi-transmitting and multi-receiving microwave transmission devices, and MIMO groups are formed among the devices;
the recovery unit is used for actively recovering the fault service unit according to a preset time period when the service transmission is interrupted, ending if the service recovery is successful, or else, waiting for the next time period to continuously try to recover until the service recovery is successful;
the fault service unit is one or more of a main polarization direction service unit, a space main polarization direction service unit, a secondary polarization direction service unit and a space secondary polarization direction service unit;
when the failure service unit is a service unit with two MIMO offset functions, the recovery unit is further used for closing the failure service unit with the MIMO offset function which fails first, opening the failure service unit with the MIMO offset function which fails later, and closing the MIMO offset function service unit with the failure service unit; performing timing recovery according to a preset time period generated by a time sequence generation algorithm, opening a fault service unit with a fault MIMO offset function to try active recovery, if the service recovery is successful, ending, and if not, waiting for the next time period to continue trying recovery until the service recovery is successful; when the failure service unit is a service unit with two XPIC offset functions, the failure service unit with the XPIC offset function which fails firstly is closed, the failure service unit with the XPIC offset function which fails later is opened, and the XPIC offset function service unit with the failure service unit is closed; timing recovery is carried out according to a preset time period generated by a time sequence generation algorithm, a fault service unit with a fault XPIC offset function is opened to try active recovery, if the service recovery is successful, the operation is finished, otherwise, the recovery is continuously tried in the next time period until the service recovery is successful; when the failure service unit is a service unit with XPIC offset function and a service unit with MIMO offset function, the failure service unit with XPIC offset function and the failure service unit with MIMO offset function are closed, the XPIC offset function service unit with XPIC offset function and the MIMO offset function service unit with MIMO offset function are closed; and timing recovery is carried out according to a preset time period generated by a time sequence generation algorithm, a failed service unit with a failed XPIC (x-ray integrated circuit) offset function and a failed service unit with a failed MIMO offset function are opened to try to actively recover, if the service recovery is successful, the operation is finished, otherwise, the recovery is continuously tried for the next time period until the service recovery is successful.
6. The apparatus of claim 5,
the recovery unit is also used for opening the fault service unit with the fault XPIC offset function and the fault service unit with the fault MIMO offset function, and the fault service unit with the fault XPIC offset function and the fault service unit with the fault MIMO offset function are synchronously recovered.
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| CN201710001226.7A CN108270607B (en) | 2017-01-03 | 2017-01-03 | Microwave communication method and device |
| PCT/CN2017/112437 WO2018126811A1 (en) | 2017-01-03 | 2017-11-22 | Method and apparatus for microwave communication |
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| CN201710001226.7A CN108270607B (en) | 2017-01-03 | 2017-01-03 | Microwave communication method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800678A (en) * | 2010-03-12 | 2010-08-11 | 华为技术有限公司 | Microwave transmission method, device and system applying CCDP and XPIC |
| CN103378899A (en) * | 2012-04-25 | 2013-10-30 | 中兴通讯股份有限公司 | Control method and system by application of cross-polarization interference counteracter |
| WO2016072206A1 (en) * | 2014-11-05 | 2016-05-12 | 日本電気株式会社 | Communication system, transmission apparatus, and communication method |
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| JP2004172975A (en) * | 2002-11-20 | 2004-06-17 | Nec Corp | Both polarized wave receiver, and local phase noise reduction method therefor |
| US9059876B2 (en) * | 2013-01-16 | 2015-06-16 | Broadcom Corporation | Communication system having cross polarization interference cancellation (XPIC) |
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- 2017-11-22 WO PCT/CN2017/112437 patent/WO2018126811A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800678A (en) * | 2010-03-12 | 2010-08-11 | 华为技术有限公司 | Microwave transmission method, device and system applying CCDP and XPIC |
| CN103378899A (en) * | 2012-04-25 | 2013-10-30 | 中兴通讯股份有限公司 | Control method and system by application of cross-polarization interference counteracter |
| WO2016072206A1 (en) * | 2014-11-05 | 2016-05-12 | 日本電気株式会社 | Communication system, transmission apparatus, and communication method |
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