WO2016000423A1 - Procédé et dispositif de compensation de retard - Google Patents

Procédé et dispositif de compensation de retard Download PDF

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Publication number
WO2016000423A1
WO2016000423A1 PCT/CN2014/094269 CN2014094269W WO2016000423A1 WO 2016000423 A1 WO2016000423 A1 WO 2016000423A1 CN 2014094269 W CN2014094269 W CN 2014094269W WO 2016000423 A1 WO2016000423 A1 WO 2016000423A1
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WIPO (PCT)
Prior art keywords
delay
value
signal
compensation
preset position
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PCT/CN2014/094269
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English (en)
Chinese (zh)
Inventor
张雪
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to MYPI2016002333A priority Critical patent/MY189564A/en
Priority to RU2017100648A priority patent/RU2648285C1/ru
Publication of WO2016000423A1 publication Critical patent/WO2016000423A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted

Definitions

  • the present invention relates to the field of communication optical transmission network OTN, and in particular, to a method and apparatus for delay compensation.
  • the core concept of the distributed base station is to separate the traditional macro base station baseband processing unit (BBU) and the radio remote unit (RRU), and the two are connected through optical fibers or bearer network devices.
  • BBU base station baseband processing unit
  • RRU radio remote unit
  • the distributed base station solution Compared with the traditional base station solution, the distributed base station solution not only greatly reduces the dependence on the site equipment room, reduces the difficulty of deployment, but also effectively increases the network construction speed, which greatly saves the network construction cost and operation and maintenance cost for the operator. It meets the needs of operators for fast and low-cost network construction. Therefore, the network construction mode of distributed base stations has become an important choice for carrier base station deployment.
  • the distributed base station is implemented by using a Common Public Radio Interface (CPRI) to transmit digital baseband data to a remote radio remote unit (RRU) through a bearer network device.
  • CPRI Common Public Radio Interface
  • the public wireless interface specification CPRI is a standard interface for connecting BBUs and RRUs initiated by companies such as Ericsson, Huawei, NEC, Nortel Networks and Siemens.
  • the CPRI interface can be used in a variety of 3G formats as well as future LTE.
  • both fiber direct drive and WDM/OTN technologies can meet the transmission requirements of CPRI.
  • the use of the optical transport network OTN to carry the CPRI interface signal can improve the bandwidth utilization of the optical fiber, support longer-distance transmission, provide complete protection and rich optical layer management, support any topology networking, simplify operation and maintenance management, and simplify expansion. Can increase the speed of launching new wireless services; and use the optical transport network OTN to carry CPRI, It also extends the transmission distance and provides protection. Therefore, CPRI over OTN will be widely used by operators.
  • the OTN device Before the wireless device does not use the distributed base station, the OTN device is not used in the case of the delay compensation mechanism implemented in the wireless device. With the large number of applications of the OTN device in the wireless communication, the OTN device is urgently needed to solve the delay. Problem (For the omnidirectional transmit network application technical requirements for mobile communication base stations, the transmission delay of each transmit channel at the antenna port needs to be synchronized within the allowable range value; that is, all RRUs must be synchronized and transmitted at the specified time) .
  • the embodiment of the invention provides a method and device for delay compensation, which can conveniently implement delay compensation of the bearer network device without affecting the function of the original device, so that the RRUs of all wireless devices are at a specified time.
  • a method of delay compensation comprising:
  • the step of separately acquiring the first delay value generated by the following signal transmission in the first device and the second delay value generated by transmitting in the second device includes:
  • the step of separately acquiring the first delay value generated by the following signal transmission in the first device and the second delay value generated by transmitting in the second device further includes:
  • the first preset delay value of the first device is a maximum delay value measured by the first device in a preset time period; and the second preset delay of the second device is The value is the maximum delay value measured by the second device within a preset period of time.
  • the formula for calculating the delay compensation value is:
  • Delay compensation value (maximum delay value of the first device - first delay value) + (maximum delay value of the second device - second delay value).
  • the step of delay compensation of the service signal transmission process according to the delay compensation value includes:
  • the step of using the delay compensation value to control an output of the first-in first-out queue includes:
  • the service signals are sequentially output.
  • the embodiment of the invention further provides a device for delay compensation, comprising:
  • the extracting module is configured to acquire a follow signal of the following service signal transmission during the process of transmitting the service signal from the first device to the second device;
  • a delay acquisition module configured to respectively acquire a first delay value generated by the following signal transmission in the first device and a second delay value generated by transmitting in the second device;
  • a difference obtaining module configured to obtain a first difference between the first delay value and a first preset delay value of the first device, and the second delay value and the second device a second difference of the second preset delay value;
  • Inserting a module configured to insert the first difference into the service signal to transmit the service signal to the second device
  • a compensation acquisition module configured to extract the first difference value from the service signal on the second device, and obtain a delay compensation in a transmission process of the service signal according to the first difference value and the second difference value value;
  • the compensation module is configured to perform delay compensation on the service signal in the process of transmitting the service signal according to the delay compensation value.
  • the delay obtaining module includes:
  • the first clock acquisition module is configured to extract the following signal at a first preset position of the first device, and acquire information of the following signal at the first preset position;
  • a second clock acquisition module configured to extract the following signal at a second preset position of the first device, and acquire information of the following signal at the second preset position
  • the first delay acquisition submodule is configured to acquire a first delay value generated by the following signal transmission in the first device according to the information of the following signal at the first preset position and the second preset position.
  • the delay obtaining module further includes:
  • a third clock acquisition module configured to extract the following signal at a third preset position of the second device, and acquire information of the following signal at the third preset position
  • a fourth clock acquisition module configured to extract the following signal at a fourth preset position of the second device, and acquire information of the following signal at the fourth preset position
  • a second delay acquisition submodule configured to acquire a second delay value generated by the following signal transmission in the second device according to the information of the following signal at the third preset position and the fourth preset position.
  • the first preset delay value of the first device is a maximum delay value measured by the first device in a preset time period; and the second preset delay of the second device is The value is the maximum delay value measured by the second device within a preset period of time.
  • the calculation formula of the delay compensation value is specifically:
  • Delay compensation value (maximum delay value of the first device - first delay value) + (maximum delay value of the second device - second delay value).
  • the compensation module includes:
  • the compensation submodule is configured to delay compensation of the service signal transmission process by using a first in first out queue; wherein the delay compensation value is used to control the output of the first in first out queue.
  • the compensation submodule includes:
  • the scaling module is configured to convert the delay compensation value into a read/write clock period value of the N first-in first-out queues according to the read/write clock of the first-in first-out queue;
  • the output module is configured to sequentially output the service signals after writing N service signals in the first-in first-out queue.
  • the required delay compensation value during the transmission of the service signal is calculated by acquiring the delay value of the following signal transmitted by the following service signal in the first device and the second device. And delay compensation of the service signal; without affecting the function of the original device, the delay compensation of the bearer network device is conveniently implemented, so that the RRU of all the wireless devices are synchronously transmitted within the specified time.
  • the technical requirements of the omnidirectional transmitting network to the mobile communication base station are satisfied.
  • FIG. 1 is a flow chart showing the basic steps of a method for delay compensation according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing an application scenario of a method for delay compensation according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram showing signal transmission of a method for delay compensation according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a network basic topology according to a specific embodiment 1 of the embodiment of the present invention.
  • FIG. 5 is a block diagram showing the access to the CPRI6 service according to the first embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a delay measurement path according to Embodiment 1 of the embodiment of the present invention.
  • FIG. 7 is a block diagram showing an internal logic and a framer of an FPGA according to Embodiment 2 of the embodiment of the present invention.
  • FIG. 8 is a schematic diagram showing a relative position of a frame header of each point in a second embodiment of the embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an apparatus for delay compensation according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method and a device for delay compensation by acquiring an following service signal transmission in the related art that the wireless device adopts an internal delay compensation mechanism and the delay between two separate devices cannot be solved.
  • the delay value of the following signal in the first device and the second device calculates the required delay compensation value during the transmission of the service signal, and delays the service signal; and does not affect the function of the original device.
  • the delay compensation of the bearer network device is conveniently implemented, so that the RRUs of all the wireless devices are synchronously transmitted within a specified time, and the technical requirements of the omnidirectional transmit network to the mobile communication base station are satisfied.
  • an embodiment of the present invention provides a method for delay compensation, including:
  • Step 1 acquiring, in a transmission process of the service signal from the first device to the second device, a follow signal that follows the service signal transmission;
  • Step 2 respectively acquiring a first delay value generated by the following signal transmission in the first device and a second delay value generated by transmitting in the second device;
  • Step 3 Obtain a first difference between the first delay value and a first preset delay value of the first device, and the second delay value and a second preset of the second device The second difference of the delay value;
  • Step 4 insert the first difference value into the service signal and transmit the service signal to the second device;
  • Step 5 Extract the first difference value from the service signal on the second device, and obtain a delay compensation value required for a service signal transmission process according to the first difference value and the second difference value;
  • Step 6 Perform delay compensation on the service signal in the process of transmitting the service signal according to the delay compensation value.
  • the following signal in step 1 may be a certain signal related to the service extracted from the service signal, or may be other signals inserted into the service signal, as long as it can always follow the transmission of the service signal.
  • the signals are applicable in the embodiments of the present invention.
  • the following signals are extracted in the first device and the second device respectively, and the transmission delays between the two signals in the first device and the second device are respectively measured. corresponding a first delay value and a second delay value; wherein the measurement of the first delay value and the second delay value is obtained by a clock counting method, that is, inserting a measurement clock during the entire process of the service signal transmission, according to The number of clocks between locations that need to be measured determines the delay value.
  • the delay value in the first device and the second delay value in the second device are unstable, the delay value changes according to factors such as time and signal strength, so in order to ensure the stability of the delay
  • the first preset delay value of the first device and the second preset delay value of the second device are preset, and the corresponding difference between the real-time delay value and the preset delay value is obtained through step 3. That is, the first difference value and the second difference value; wherein the first preset delay value and the second preset delay value are specifically obtained by using a large amount of experimental data, and may also pass the theory of the first device or the second device.
  • the parameters are calculated by numerical calculation, and are not limited to a fixed manner. All the manners that can correctly obtain the first preset delay value and the second preset delay value are applicable in the embodiments of the present invention.
  • step 6 compensates the service signal with the delay device or device according to the compensation value required for the delay obtained in step 5; wherein the delay device or device is a delay circuit, an FPGA device delay or a delay switch, etc. Wait, don't repeat them here.
  • the method for delay compensation in the transmission process of the service signal transmitted from the first device to the second device is specifically described in the present invention. In practical applications, each device has a signal transmission in two directions. Both of them will generate delays, and delay compensation is required. Therefore, when using the delay device for compensation in step 6, the delays in the two directions of the device need to be compensated separately, so as to delay the transmission of the service signal. Stable.
  • step 2 may include:
  • Step 21 Extract the following signal at a first preset position of the first device, and acquire information about the following signal at the first preset position;
  • Step 22 Extract the following signal at a second preset position of the first device, and obtain information about the following signal at the second preset position;
  • Step 23 Acquire a first delay value generated by the following signal transmission in the first device according to the information of the following signal at the first preset position and the second preset position.
  • Step 2 may also include:
  • Step 24 extracting the following signal at a third preset position of the second device, and acquiring information of the following signal at the third preset position;
  • Step 25 extract the following signal at a fourth preset position of the second device, and obtain the Following the information of the signal at the fourth preset position;
  • Step 26 Acquire a second delay value generated by the following signal transmission in the second device according to the information of the following signal at the third preset position and the fourth preset position.
  • steps 21 to 26 describe a step of acquiring a first delay value and a second delay value by using a clock counting method; wherein, in the process of transmitting a service signal, a measurement clock is inserted, optionally
  • the measurement clock can use the system clock of the service signal transmission system, or can be a separately set clock, and is not limited to a fixed form.
  • the first preset position and the second preset position of the first device are differently set according to different devices, and are not fixed to one position; the first clock information at the first preset position, that is, the first preset position is Corresponding position on the measurement clock, the second clock information in the second preset position, that is, the correspondence between the second preset position on the measurement clock; and then performing step 23, by calculating the first preset position on the measurement clock and The number of clocks between the two preset positions obtains a first delay value; for example, there are 4 measurement clock cycles between the first clock information and the second clock information, and the first delay value is 4 measurement clocks.
  • the period value specifically, the unit of the delay value is generally ns.
  • the obtaining process of the second delay value is consistent with the obtaining process of the first delay value, and details are not described herein.
  • the delay compensation is not performed inside the first device, but the first delay value is inserted into the service signal and transmitted to the first In the second device, optionally, the first delay value uses a reserved overhead of the OTN to perform a delay value transmission method to implement interaction between two separate devices.
  • the first preset delay value of the first device is a maximum delay value measured by the first device within a preset time period; and the second pre-second of the second device The delay value is a maximum delay value measured by the second device within a preset time period.
  • the method for obtaining the maximum delay value of the first device and the maximum delay value of the second device may be: by measuring a plurality of the same devices, and at least dropping the power and inserting and removing the optical fiber 100 times to obtain an experiment. Data, and then analyze its experimental data to get a more accurate maximum delay value.
  • the calculation formula of the delay compensation value is:
  • Delay compensation value (maximum delay value of the first device - first delay value) + (maximum delay value of the second device - second delay value).
  • step 6 includes:
  • Step 61 Perform delay compensation on the service signal transmission process by using a first-in first-out queue; wherein the delay compensation value is used to control the output of the first-in first-out queue.
  • FIFO-first-in first-out queue the abbreviation of First Input First Output
  • this is a traditional sequential execution method
  • the first entered instruction is completed and retired, followed by the second instruction.
  • the principle of the first-in first-out queue is: the FIFO queue does not classify the message, and the FIFO enters the queue according to the order in which the message arrives at the interface. At the same time, the FIFO exits the queue in the order of the queue, advanced. The message will be sent out first, and the incoming message will be sent out.
  • the step of using the delay compensation value to control the output of the first in first out queue includes:
  • Step 62 Convert the delay compensation value into a read/write clock period value of the N first-in first-out queues according to the read/write clock of the first-in first-out queue; N is an integer greater than or equal to 1.
  • Step 63 After the N service signals are written in the first-in first-out queue, the service signals are sequentially output.
  • the first-in first-out queue FIFO is equivalent to a buffer.
  • the FIFO does not read outward, and writes data to the FIFO;
  • the number of service signals in the FIFO is equal to N, a data is written into the FIFO, and the output of the FIFO reads out a data outward; it should be noted that the service signal is always transmitted, and the FIFO is constantly being continuously When the data is written, the FIFO will continuously read out the data; at the same time, since the number of service signals in the FIFO is equal to N, it is ensured that each service signal is output from the second device end with the maximum delay value, thereby ensuring The stability of the delay.
  • the read/write clock of the first-in first-out queue in the above embodiment of the present invention may also adopt a system clock or a clock consistent with the above-mentioned measurement clock. If the read/write clock of the first-in first-out queue is consistent with the measurement clock, the delay value and the delay compensation value can be directly calculated by using several times of the clock period value, without converting to a specific ns, and then step 62
  • the delay compensation value in the direct value is N clock cycle values, which simplifies the calculation steps.
  • two devices in the bearer network are respectively applied between two terminal devices (external device 1 and external device 2), between the two terminal devices.
  • two terminal devices external device 1 and external device 2
  • the present invention provides a method of delay compensation, as shown in FIG.
  • the first step is to extract or insert a signal covering the entire path that may cause a delay change in the board 1 and the board 2, and generally extract or insert a signal (following signal) upstream of the board 1 / board 2, The same signal is extracted downstream of the corresponding board 1/board 2, and the delay between the two signals is measured.
  • the samples of the multiple boards are measured, and the maximum values measured by the delay measurement module 1 and the delay measurement module 2 are found in all the single board samples, and the maximum values of the delays of the device 1 and the device 2 are respectively defined as Ta_delay_max and Tb_delay_max.
  • the delay values of the two boards, Ta_delay_now and Tb_delay_now are measured after the board is powered.
  • the delay value measured by the board 1 is transmitted to the board 2 through the service transmission, and then the delay value (Ta_delay_now) measured by the board 1 is extracted in the board 2.
  • the value Ta_delay_now measured by the board 1 and the delay value Tb_delay_now of the board 2 are respectively compared with the maximum values of the delays (Ta_delay_max and Tb_delay_max), and the difference is seen, and then the delay compensation module is used to compensate the difference. Two differences.
  • the client side refers to the service that our board accesses
  • the line side refers to the service that carries the CPRI. This refers to the OTN service.
  • the business process is first processed by the FPGA logic for the customer service and the line side service, and then converted to an optical signal for transmission through the framer chip and then to the optical port.
  • the odu2 layer is sent to the line side, and there is a delay, which is passed through the board position.
  • the odu2 frame header (fp1) and the frame header (fp2) at the exiting board position are measured and obtained.
  • the logic module that implements this measurement is the delay measurement module 1, and the measured first delay value is Ta_delay_now.
  • the two boards are connected by optical fibers.
  • the measured first delay value Ta_delay_now can be transmitted to the downstream site for compensation through the OTN overhead or the payload area.
  • the delay of the client side is received, and the measurement is obtained by the frame header (fp3) of the board position and the frame header (fp4) of the board position.
  • the logic module that implements this measurement is the delay measurement module 2, and the measured second delay value is Tb_delay_now.
  • the logic computes the two delay values from the maximum delay values (Ta_delay_max and Tb_delay_max) that have been extensively tested before, resulting in fifo_value. This delay value is then compensated by the delay compensation FIFO.
  • Figure 6 shows the entire service processing block diagram of the OTN board.
  • the client side connects the 6.214 Gb/s CPRI6 service and the line side fiber loopback.
  • a position In the FPGA logic, the signal extracted by the client side is transmitted.
  • the odu2 overhead inserts the header signal from the part, which is before the FEC encoding.
  • the frame header signal is extracted from the overhead extraction part, and this signal is after FEC decoding.
  • D position In the FPGA logic, the signal extracted by the client side receiving side.
  • Path 1 Contains all logic and SFI4.2 interfaces on the client side and line side as well as partial processing modules in the framer.
  • Path 2 Includes codec in the framer and optical module to fiber section.
  • Path 3 Contains some of the processing modules in the framer and the SFI4.2 interface and the receiving side line side and client side logic.
  • the delay variation mainly exists in path 1 and path 3.
  • the delay variation of other paths can be neglected. Therefore, in order to facilitate the test, compensation path 1 and 3 can realize the purpose of delay compensation. Therefore, add fifo on the receiving side of the FPGA line side to delay compensation, so that each power-on delay reaches the maximum value and is in a stable state.
  • the first delay value Ta_delay_now and the second delay value Tb_delay_now after power-on are the delay values of path 1 and path 3, respectively.
  • the delay value reaches a steady state.
  • Tdelay_offset ⁇ (Ta_delay_max-Ta_delay_now)+(Tb_delay_max-Tb_delay_now) ⁇ .
  • the read and write clocks of the FIFO are all system clocks.
  • the fifo water level is controlled by Tdelay_offset. If the number of service signals is less than Tdelay_offset, the data is not read. The data is written to fifo. When the number of service signals is equal to Tdelay_offset, fifo starts to continuously Read data out. This ensures the stability of the delay.
  • This application example shows the measurement of the delay stability and the compensation method when the service board of the OTN device carries the cpri6 service.
  • This method is also applicable to other rate services related to CPRI, such as CPRI2/CPRI3/CPRI4/CPRI5/CPRI6/CPRI7 services, and the whole process is basically the same as that of the first embodiment.
  • This method is also applicable to other service boards of the OTN equipment.
  • this method can be applied to compensate.
  • the service loopback determines that the client-side delay variation is stable. To determine whether the delay instability is generated at the SFI4.2 interface, or in the framer, whether it is on the receiving side or on the transmitting side, it needs to be in the FPGA and The corresponding signal is extracted from the framer, and the signal is captured by the chipscope to test.
  • a position frame header In the FPGA logic, the line transmission side, the frame header of the otu2 data to be sent to the SFI4.2 interface.
  • the frame header signal is extracted from the overhead insertion portion, and this signal is before the FEC encoding.
  • the frame header signal is extracted from the overhead extraction part, and this signal is after FEC decoding.
  • D position frame header In the framer, the client sends the frame header extracted by the overhead part.
  • E position frame header In the FPGA logic, on the line receiving side, the frame header signal before the OTU2 overhead is extracted.
  • the above signal is captured by chipscope, and the frame header signal of point A is used as the trigger signal, and the relative positions of points B, C, D, and E are recorded separately after each power-off.
  • the waveform is shown in Figure 8.
  • the delay values T1delay_now and T2delay_now after power-on are the delay values of path 1 and path (3+4), respectively.
  • the delay of these paths is measured, and finally, according to the above measurement compensation method, the effect of delay compensation is finally achieved.
  • the embodiment of the present invention further provides a device for delay compensation, including:
  • the extraction module 10 is configured to transmit a service signal from the first device to the second device Obtaining a follow signal that follows the transmission of the service signal;
  • the delay obtaining module 20 is configured to respectively acquire a first delay value generated by the following signal transmission in the first device and a second delay value generated by transmitting in the second device;
  • the difference obtaining module 30 is configured to obtain a first difference between the first delay value and a first preset delay value of the first device, and the second delay value and the second device a second difference of the second preset delay value;
  • the inserting module 40 is configured to insert the first difference value into the service signal and transmit the service signal to the second device;
  • the compensation acquisition module 50 is configured to extract the first difference value from the service signal on the second device, and obtain a delay required in a service signal transmission process according to the first difference value and the second difference value. Time compensation value;
  • the compensation module 60 is configured to perform delay compensation on the service signal in the process of transmitting the service signal according to the delay compensation value.
  • the delay obtaining module 20 includes:
  • the first clock acquisition module is configured to extract the following signal at a first preset position of the first device, and acquire information of the following signal at the first preset position;
  • a second clock acquisition module configured to extract the following signal at a second preset position of the first device, and acquire information of the following signal at the second preset position
  • the first delay acquisition submodule is configured to acquire a first delay value generated by the following signal transmission in the first device according to the information of the following signal at the first preset position and the second preset position.
  • the delay obtaining module 20 further includes:
  • a third clock acquisition module configured to extract the following signal at a third preset position of the second device, and acquire information of the following signal at the third preset position
  • a fourth clock acquisition module configured to extract the following signal at a fourth preset position of the second device, and acquire information of the following signal at the fourth preset position
  • a second delay acquisition submodule configured to acquire a second delay value generated by the following signal transmission in the second device according to the information of the following signal at the third preset position and the fourth preset position.
  • the first preset delay value of the first device is a maximum delay value measured by the first device within a preset time period; and the second preset of the second device is The delay value is the number The maximum delay value measured by the second device during a preset period of time.
  • the calculation formula of the delay compensation value is:
  • Delay compensation value (maximum delay value of the first device - first delay value) + (maximum delay value of the second device - second delay value).
  • the compensation module 60 includes:
  • the compensation submodule is configured to delay compensation of the service signal transmission process by using a first in first out queue; wherein the delay compensation value is used to control the output of the first in first out queue.
  • the compensation submodule includes:
  • the scaling module is configured to convert the delay compensation value into a read/write clock period value of the N first-in first-out queues according to the read/write clock of the first-in first-out queue;
  • the output module is configured to sequentially output the service signals after writing N service signals in the first-in first-out queue.
  • the required delay compensation value during the transmission of the service signal is calculated by acquiring the delay value of the following signal transmitted by the following service signal in the first device and the second device. And delay compensation of the service signal; without affecting the function of the original device, the delay compensation of the bearer network device is conveniently implemented, so that the RRU of all the wireless devices are synchronously transmitted within the specified time.
  • the technical requirements of the omnidirectional transmitting network to the mobile communication base station are satisfied.
  • the apparatus for delay compensation provided by the embodiment of the present invention is a device applying the above method, and all embodiments of the foregoing method are applicable to the device, and all of the same or similar beneficial effects can be achieved.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the delay of the bearer network device is conveniently implemented without affecting the function of the original device, so that the RRUs of all the wireless devices are synchronously transmitted within a specified time, and the omnidirectional transmitting group is satisfied.

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  • Optical Communication System (AREA)

Abstract

L'invention concerne un procédé et un dispositif de compensation de retard. Le procédé comprend : un signal suivant émis avec un signal de service est obtenu dans le processus d'émission du signal de service depuis un premier dispositif vers un deuxième dispositif ; une première valeur de retard amenée par l'émission du signal suivant dans le premier dispositif et une deuxième valeur de retard amenée par l'émission du signal suivant dans le deuxième dispositif sont respectivement obtenues ; une première valeur de différence entre la première valeur de retard et une valeur de retard prédéfinie du premier dispositif et une deuxième valeur de différence entre la deuxième valeur de retard et une valeur de retard prédéfinie du deuxième dispositif sont obtenues ; la première valeur de différence est insérée dans le signal de service et émise avec le signal de service vers le deuxième dispositif ; la première valeur de différence est extraite du signal de service sur le deuxième dispositif et une valeur de compensation de retard nécessaire dans le processus d'émission du signal de service est obtenue conformément à la première valeur de différence et à la deuxième valeur de différence ; la compensation du retard pour le signal de service dans le processus d'émission du signal de service est effectuée conformément à la valeur de compensation de retard.
PCT/CN2014/094269 2014-06-30 2014-12-18 Procédé et dispositif de compensation de retard WO2016000423A1 (fr)

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MYPI2016002333A MY189564A (en) 2014-06-30 2014-12-18 Delay compensation method and device
RU2017100648A RU2648285C1 (ru) 2014-06-30 2014-12-18 Способ и устройство компенсации задержки

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CN114785715A (zh) * 2022-03-15 2022-07-22 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） 链路时延检测系统及方法
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MY189564A (en) 2022-02-16
RU2648285C1 (ru) 2018-03-23

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