WO2010083626A1 - 用于实时分布式系统的同步方法及其装置 - Google Patents
用于实时分布式系统的同步方法及其装置 Download PDFInfo
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- WO2010083626A1 WO2010083626A1 PCT/CN2009/000100 CN2009000100W WO2010083626A1 WO 2010083626 A1 WO2010083626 A1 WO 2010083626A1 CN 2009000100 W CN2009000100 W CN 2009000100W WO 2010083626 A1 WO2010083626 A1 WO 2010083626A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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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
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
Definitions
- the present invention relates to a real-time distributed system, and more particularly to a synchronization method and apparatus for a processing apparatus for a wireless multiple input multiple output device. Background technique
- Multi-Input Multi-Output, MIMO for short communication systems have emerged.
- MIMO systems physical layer data is processed in parallel using multiple distributed processing devices including multiple digital signal processors (DSPs).
- DSPs digital signal processors
- the received data of multiple antennas needs to be synchronized: Each processor processes the data received by one antenna separately, and each processor simultaneously processes the physical layer data in the same frame and sends it to the MIMO demodulator. Therefore, the synchronization between these multiple processors becomes very necessary.
- each processor is controlled by a respective control process, and each control process synchronizes through inter-process communication such as semaphores or signal lights, shared global variables, and indirectly controls each processor to perform synchronous operations.
- each process also runs on a different CPU, and each CPU is connected through a network such as Ethernet. In this case, each process is also synchronized by an Ethernet protocol or the like.
- the speed requirement for the synchronization processing is correspondingly high, so the time overhead required for synchronization should be as small as possible, that is, real-time synchronization is usually required.
- the synchronization of distributed modules implemented by software such as inter-process communication usually has a large delay, especially in the case where the number of processes requiring synchronization is large, the synchronization delay is usually as long as several milliseconds to several tens In milliseconds, it will be difficult to meet the real-time synchronization requirements of multi-antenna MIMO systems. Summary of the invention
- a method for synchronous operation with other modules in a distributed module of a real-time distributed system comprising the steps of: i. being unified with the other distributed modules Synchronizing the start time, determining whether the module can operate synchronously; ii. setting an operation indication signal of the module in the logic circuit according to the determination result; iii. according to the operation indication signal of the module, and the other module
- the operation indication signals respectively set in the logic circuit determine whether the module operates synchronously according to a rule unified with the other modules.
- an apparatus for synchronizing with other distributed modules in a distributed module of a real-time distributed system comprising: determining means for using the other a unified synchronization start time of the distributed module, determining whether the module can be synchronously operated; setting means for setting an operation indication signal of the module in the logic circuit according to the determination result; determining means for using the The operation indication signal of the module, and the operation indication signal respectively set by the other modules in the logic circuit, determine whether the module operates synchronously according to a rule unified with the other distributed modules.
- the synchronization start time is indicated by a start interrupt signal provided by a counter controlling the module, and the start interrupt signal is synchronized with a start interrupt signal provided by a counter controlling the other module to other modules controlled thereby.
- the counter that controls the module is driven by a first clock signal that is synchronized with a clock signal that drives the counter that controls other modules.
- the distributed module determines the logical AND of the operation indication signal of the module and the operation indication signals of the other modules: when the logical AND is true, it is determined that the module operates synchronously; otherwise, it is determined that the module does not operate synchronously.
- Embodiments of the present invention are implemented in hardware, for example, including multiple parallel DSPs Synchronous operation of distributed modules of real-time distributed systems such as multi-antenna MIMO systems. Since the time required for logically setting, calculating, and judging the logic device in the logic circuit is short, the embodiment of the present invention realizes the synchronization of the distributed module with a relatively long time overhead, and can synchronize multiple times in real time at high speed.
- the processor improves the real-time synchronization processing data processing capability of the MIMO communication device, satisfies the complex algorithm requirements in the multi-antenna MIMO system, thereby improving the communication rate; and the preferred embodiment of the present invention requires only two logic lines and several logics.
- the door is simple, efficient, easy to implement, and has a convenient cascading extension.
- 1 is a system architecture for implementing synchronization in a 4x4 MIMO receiver in accordance with an embodiment of the present invention
- FIG. 2 is a flow chart of a method for a DSP to operate synchronously with other DSPs in the MIMO receiver of FIG. 1 in accordance with an embodiment of the present invention
- FIG. 3 is a timing diagram of logic signals for synchronization of both DSP 0 and another DSP 1 in the MIMO receiver of FIG. 1 for synchronization, in accordance with an embodiment of the present invention
- FIG. 4 is a block diagram of an apparatus for operating in synchronization with other DSP processor modules in a DSP processor of a MIMO receiver in accordance with another embodiment of the present invention.
- each DSP processor uses Processing data from one of the four antennas of the MIMO receiver.
- a buffer is generally provided between the antenna and the DSP processor. The data received by the antenna is first saved to the buffer by the FPGA (Field Programmable Gate Array), and the DSP reads the data from the buffer.
- the antenna, FPGA and buffer described above are not shown in Figure 1.
- Each of the service boards of the receiver further has a counter for providing an interrupt signal to the DSP processor, and each counter synchronously provides an interrupt signal for each DSP processor, and the interrupt signal is used to indicate to each DSP processor.
- the synchronization timings of the other DSP processors are synchronized, such as the synchronization start time and the synchronization end time.
- Each counter is connected to the same GPS (Global Positioning System) clock. The GPS clock receives satellite signals in the sky and recovers a globally uniform time information from the satellite signals, providing a uniform 10 MHz drive signal to each counter.
- GPS Global Positioning System
- the GPS clock provides a uniform 1 Hz clock synchronization signal for each counter to synchronize the counting logic of each counter.
- clock synchronization signal There are two uses for synchronizing the counter's counting logic using this clock synchronization signal:
- the counting logic of the counter is driven by a 10 MHz clock, and since the MIMO receiver and mobile terminal located in the base station use different GPS clocks, the 10 MHz clocks generated by them respectively have some frequency difference.
- the 1 Hz clock is used to reset the count logic of each counter, eliminating the effect of frequency difference accumulation between the base station and the mobile terminal. It can be understood that the above unified 1 Hz clock synchronization signal is not required by the present invention, and any other method may be used to implement between the various counters on each service board.
- the counting logic is synchronized, and the frequency difference accumulation between the base station and the mobile terminal is eliminated.
- each service board also has a one-bit logic device Req and a logic device Ack connected to the DSP processor.
- each logic device Req (ie, true/false, or 1/0, or valid/invalid, etc.) may be set by the DSP processor to indicate whether the DSP processor can perform synchronization operation indication signals.
- the logic value of the logic device Req of each service board is logically ANDed by a plurality of AND gates in one logic circuit, and the result of the logical AND is fed back to (set to) the logic of each service board in one logic circuit.
- the logic device Ack returns the logic and result of each logic device Req to the DSP processor.
- the logic device Req and the logic device Ack are independent of the DSP processor; those skilled in the art can understand that in other embodiments, the logic device Req and the logic device Ack can be integrated into the DSP processor. Its function is implemented by a DSP processor, one or more pins of the DSP processor being coupled to corresponding logic circuits including logic devices such as AND gates. These and other implementations are within the scope of the claims of the present invention.
- each counter synchronously generates four interrupt signals of the same time interval in each data frame time.
- Each synchronized interrupt signal indicates each time in a frame for each DSP processor, and also indicates a synchronization time including a synchronization start time, a synchronization end time, and the like.
- the first interrupt signal indicates the start of the frame
- the start interrupt signal indicates a unified synchronization start time for each DSP processor
- the fourth interrupt signal indicates that the frame is about to end, and the end interrupt signal is processed by each DSP.
- the device indicates a unified synchronization end time.
- the counter also generates an interrupt signal sequence number, such as 0, 1, 2, and 3, when the interrupt signal is generated, as shown in FIG.
- the interrupt signal sequence number indicates which synchronization time the interrupt signal is generated at the same time. The two together more accurately indicate the synchronization time for the DSP processor, avoiding the confusion that may occur due to the simple use of the interrupt signal. It can be understood that the interrupt signal sequence number is not necessary. For example, when the DSP processor itself performs metering maintenance on the arrival number of the interrupt signal and the synchronization timing indicated by the processor, the interrupt signal sequence number can be omitted.
- each counter synchronously generates a start interrupt signal and an interrupt signal sequence number 0.
- DSP 0 determines whether the processor can operate synchronously.
- other DSP processors also determine whether the processor can operate synchronously.
- each DSP processor maintains an internal busy idle flag to indicate whether the DSP processor is currently performing data processing. In this embodiment, if the identifier is logically false, it indicates that the processor has no work that has not been processed yet, and is currently idle, and may perform synchronization processing on the communication data of a new frame; if the identifier is true, it indicates The processor is processing work that has not ended yet, and new data cannot be synchronized. It will be appreciated that the present invention is not limited to a method in which the DSP processor identifies and determines the operational status of the processor by means of a busy identification.
- the busy idle flag of DSP 0 when the interrupt signal 0, the busy idle flag of DSP 0 is logically false, then in step S2, it will be in the service board in the logic circuit.
- the logic device Req is set to logic true, indicating that the processor can participate in synchronous operation.
- the busy and idle identifiers of DSPs 1, 2, and 3 are also logically false, and their logic devices Req are also set to logically true. To simplify the illustration, only the busy and idle identification and setting logic of DSP 1 are shown in FIG. Req.
- the start interrupt signal is also a read interrupt signal indicating the first read time in the data frame time: before saving and determining the logic value of the logic device Ack, in order to save time, idle
- the DSP processor can read the data received by the antenna from the buffer and perform certain pre-data processing. In this preferred case, each processor becomes busy and its busy ID is converted to logically true.
- step S3 the DSP 0 determines whether the DSP 0 operates synchronously according to the logic device Req set by the processor and the logic device Req set by each of the other DSP processors in the logic circuit according to rules unified with other DSP processors. .
- Other DSP processors perform similar operations, determining whether they operate synchronously according to rules that are consistent with other DSP processors.
- the operation indication signal set by each DSP processor that is, the logic value of the logic device Req is logically AND, and the result is set as the logic device Ack logic on each service board.
- Each DSP The uniform rule used by the processor is to determine whether the logical value of its logical device Req and the logical value of other DSP processors are true or false: when the logical AND is true, it is determined that the DSP processor operates synchronously; otherwise , to determine that the DSP processor is not operating synchronously.
- each DSP processor should wait for a short period of several microseconds to ten microseconds after it sets the logic device Req value to detect the ACK signal. In this waiting time, preferably, in order to utilize the DSP processor more efficiently, the aforementioned pre-data processing is performed to save time. It can be understood that after each DSP sets its own Req signal, it can also not perform data pre-processing, and the waiting time of the single-chip can be detected and judged by the sub-signal to a few microseconds.
- each DSP processor judges to continue data processing on the basis of the aforementioned advance data processing.
- the second interrupt signal that is, the interrupt signal 1 is a read interrupt signal, which indicates the second read time in the data frame time
- each DSP processor can read the subsequent data from the buffer.
- the frequency of the DSP processor reading buffer can be increased, and the capacity requirement of the A/B buffer is correspondingly reduced.
- the buffer is usually implemented by using A/B buffering. That is, while the FPGA saves the data to the A buffer, the DSP reads the B buffer. Therefore, when the above interrupt signal 0 occurs, the DSP processor can read the data in the A buffer; and at the moment when the interrupt signal 1 occurs, the DSP processor can read the data of the B buffer to reciprocate.
- the interrupt signal 2 is another read interrupt signal indicating the third read time in the data frame time, and the data processing of the DSP 1 has been completed.
- the busy ID is converted to false; but the processing of DSP 0 has not ended yet, it continues to read subsequent data from the buffer and continues data processing.
- DSP The data processing of 2 and 3 has also been completed, and its busy ID is converted to false (not shown).
- the fourth interrupt signal that is, the interrupt signal number 3 is the end interrupt signal, which indicates a unified synchronization end time.
- step S4 DSP 0 sets its operational indication signal to logic false on logic device Req, and other DSP processors perform similar operations.
- the interrupt signal is also a read interrupt signal indicating the fourth read time in the data frame time. Since the processing of DSP 0 is not finished in this embodiment, it continues to read from the buffer. Take subsequent data and continue data processing.
- each counter synchronously generates a start interrupt signal and an interrupt signal sequence number 0 (the interrupt signal sequence number of frame N+1 may also continue from the last interrupt signal sequence in frame N). Number) to indicate a uniform synchronization start time to each DSP processor.
- step S1 DSP 0 determines whether it can operate synchronously. Since the data of the frame N has not been processed yet, the busy idle flag is still true, so it must process the remaining data, so that it cannot perform the synchronization operation of a new frame of data within the frame time of frame N+1. Therefore, in step S2, DSP 0 sets the operation indication signal, that is, the logic device Req of the service board 0 to logical ⁇ .
- DSPs 1, 2, and 3 since it has processed the data of the previous frame, its busy identification is that the new frame data can be synchronized in the frame time of frame N+1. Therefore, they set their respective operation indication signals, that is, the logic device Req of the respective service boards to be logically true. Thereafter, DSPs 1, 2, and 3 read the data received by the antenna from the buffer, perform certain pre-data processing, and convert the busy ID to true.
- step S3 the time t 2, since the logic device Req DSP logic 0 is false, so the operation of the logic signal indicative of the respective DSP processor with the logical value is false, 0 DSP Gen It was determined this
- the DSP processor does not operate synchronously during the N+1 frame time.
- the other DSP processors also determine accordingly that the synchronization operation is not performed in the current N+1 frame time, which can discard the result of the pre-processing and convert its busy ID to false.
- DSP 0 completes the data processing of the previous data frame.
- the fourth interrupt signal before the start of the next time DSP 0 will The operation indication signal, that is, the logic device Req is set to logic false.
- each counter synchronously generates a start interrupt signal and an interrupt signal number 0 to indicate a unified synchronization start time to each DSP processor.
- each DSP processor Since each DSP processor is in an idle state at this time, it can be synchronized in frame N+2. Thereafter, each processor is set into the operating instruction signal, and determines the synchronization operation starts at time t 3. The detailed steps are similar to those in the aforementioned frame N, and will not be described here.
- FIG. 4 is a block diagram of an apparatus 1 for operating in synchronization with other DSP processor modules in a DSP processor of a MIMO receiver in accordance with another embodiment of the present invention.
- the device 1 comprises a judging device 10, a setting device 20, a determining device 30 and a preferred resetting device 40.
- the MIMO receiver, each service board, the DSP processor, the counters, the clocks, and the logic devices Req, AND gates, and Ack are as shown in FIG. 1, similar to the foregoing embodiments of the method of the present invention, and are not described herein. .
- each counter synchronously generates a start interrupt signal and an interrupt signal sequence number 0.
- each DSP processor knows that it is now a synchronization start time unified with other DSP processors.
- the judging device 10 of the device 1 of the DSP 0 determines whether the processor can be synchronized. .
- the judging devices of other DSP processors also determine whether the processor can operate synchronously.
- each DSP processor maintains an internal busy idle flag to indicate whether the DSP processor is currently performing data processing. In this embodiment, if the identifier is logically false, it indicates that the processor has no work that has not been processed yet, and is currently idle, and may perform synchronization processing on the communication data of a new frame; if the identifier is true, it indicates The processor is processing work that has not ended yet, and new data cannot be synchronized.
- the setting device 20 will be the logic device of the service board in the logic circuit. Req is set to logically true, indicating that the processor can participate in synchronous operation.
- the busy IDs of DSPs 1, 2, and 3 are also logically false, and their logic devices Req are also set to logically true. In order to illustrate the illustration, only the logic of the busy and idle identification and setting of DSP 1 is shown in Figure 3. Device Req.
- the start interrupt signal is also a read interrupt signal, which indicates the first read time in the data frame time: before saving and determining the logic value of the logic device Ack, in order to save time, determine
- the device 10 determines that the idle DSP processor reads the data received by the antenna from the buffer and performs certain pre-data processing. Therefore, the reading device 40 of each processor reads data from the buffer, and the DSP processor processes the read data and becomes busy, and its busy identification is converted to logically true.
- the determining device 30 determines whether the DSP 0 operates synchronously according to the logic device Req set by the processor and the logic device Req set by the other DSP processors in the logic circuit according to rules unified with other DSP processors.
- Other DSP processors perform similar operations, determining whether they operate synchronously in accordance with rules that are common to other DSP processors.
- the operation indication signal set by each DSP processor that is, the logic value of the logic device Req is logically AND, and the result is set as the logic device Ack logic on each service board.
- the unified rule used by the determining device 30 is to determine whether the logic value of the logic device Req and the logic value of other DSP processors are true or false: when the logic is true, it is determined that the DSP processor operates synchronously. Otherwise, it is determined that the DSP processor is not operating synchronously.
- each DSP processor should wait a few microseconds to a few microseconds for a short period of time after it sets the logic device Req value to detect the ACK signal. During this waiting time, preferably, in order to utilize the DSP processor more efficiently, the aforementioned pre-data processing is performed to save time.
- the operation indication signals of the respective DSP processors are all true, they start synchronous operation at the time and perform MIMO data processing.
- the determining device 30 judges that the DSP processor continues data processing on the basis of the aforementioned advance data processing.
- the second interrupt signal that is, the interrupt signal 1 is a read interrupt signal, which indicates the second read time in the data frame time
- the reading device 40 can read the subsequent data from the buffer.
- the DSP processor continues the data processing based on the read subsequent data.
- the buffer is usually implemented by using A/B buffering, that is, FPGA. While saving the data to the A buffer, the DSP reads the B buffer.
- the DSP processor can read the data in the A buffer; and at the moment the interrupt signal 1 occurs, the DSP processor can read the data of the B buffer.
- the interrupt signal 2 is another read interrupt signal indicating the third read time in the data frame time, and the data processing of the DSP 1 has been completed.
- the busy flag is converted to false; however, the processing of DSP 0 has not ended yet, the reading device 40 continues to read subsequent data from the buffer, and DSP 0 continues the data processing.
- the data processing of DSP 2 and 3 has been completed, and the busy idle flag is converted to false (not shown).
- the fourth interrupt signal that is, the interrupt signal number 3 is the end interrupt signal, which indicates a unified synchronization end time.
- DSP 0 sets its operational indication signal to logic false on logic device Req, and other DSP processors perform similar operations.
- the interrupt signal is also a read interrupt signal indicating the fourth read time in the current data frame time. Since the processing of DSP 0 is not yet completed in the present embodiment, the reading device 40 continues to buffer from the buffer. The subsequent data is read in the area, and DSP 0 continues the data processing.
- each counter synchronously generates a start interrupt signal and an interrupt signal sequence number 0 (the interrupt signal sequence number of frame N+1 may also continue from the last interrupt signal sequence in frame N). Number) to indicate to each DSP processor A unified synchronization start time.
- the judging means 10 of the DSP 0 judges whether or not the DSP 0 can operate in synchronization. Since DSP 0 has not processed the data of frame N, its busy idle flag is still true, so it must process the remaining data, resulting in the inability to synchronize the operation of a new frame of data within the frame time of frame N+1. Therefore, the setting means 20 sets the operation instruction signal, i.e., the logic device Req of the service board 0, to logical false.
- DSPs 1, 2 and 3 their respective judging devices judge that they have processed the data of the previous frame, and the busy idle flag is 4 ⁇ , and a new frame data can be performed within the frame time of frame N+1. Synchronous operation. Therefore, their respective setting devices set their respective operation indication signals, that is, the logic devices Req of the respective service boards to be logically true. Thereafter, the reading devices of DSPs 1, 2 and 3 respectively read the data received by the antenna from the respective buffers, perform a certain pre-data processing, and convert the busy idle flag to true.
- the determining device 30 of the DSP 0 determines that the DSP processor is at the N according to the logic value. Synchronous operation is not performed during +1 frame time.
- the determining means of the other respective DSP processors also correspondingly determines that the synchronous operation is not performed in the N+1 frame time, which can discard the result of the previous processing and convert its busy idle flag to false.
- DSP 0 completes the data processing of the previous data frame.
- the fourth interrupt signal before the start of the next frame time DSP 0 sets its operation indication signal, logic device Req, to logic false.
- each counter synchronously generates a start interrupt signal and an interrupt signal number 0 to indicate a unified synchronization start time to each DSP processor.
- each DSP processor Since each DSP processor is in an idle state at this time, it can be synchronized in frame N+2. After the determination means determines each of the processors can be synchronized operation, each of the setting means is set into the operating instruction signal, and each determining means determines the synchronization starts operating at time t 3. The detailed steps are similar to those in the aforementioned frame N, and are not described herein.
- the DSP processor synchronously reads and processes the data received by each antenna from the buffer as an example to explain the present invention.
- each DSP processor writes communication data to a buffer connected to the corresponding antenna of the DSP processor by using a writing device at a plurality of writing times within the communication frame time.
- the plurality of write times are indicated by a plurality of read interrupt signals provided by a counter that controls the DSP processor.
- the time required for the logical setting, operation and judgment operation of the logic device in the hardware logic circuit described above is very short, usually only takes several microseconds to ten microseconds, so the time overhead required for synchronization is performed. Compared with the traditional software inter-process communication, it is much smaller than the millisecond to tens of milliseconds. It can synchronize multiple DSP processors in real time to ensure the synchronous processing rate of the DSP processor, and then improve the communication rate of the multi-antenna MIMO system. Moreover, in the implementation, only a few logic devices such as an AND gate are needed, the structure is concise and efficient, and easy to implement. Since each AND gate device is cascade-connected, when the service board or the DSP processor needs to be increased or decreased according to the system capacity, only By increasing or decreasing the cascade of logic devices, the expansion is very convenient and does not increase the time overhead of synchronization.
- the present invention has been described above by taking the logical AND of the operation instruction signals of the respective DSP processors as an example to determine whether or not the synchronous operation is performed. It can be understood that the present invention is not limited to being based on logic and synchronization. For example, when the operation instruction signal of the DSP processor uses logic false to indicate that it can perform synchronous operation, and the logic indicates that the operation cannot be performed, the corresponding logic function can be used for each The logical OR of the operation indication signal: When the logic is false, each DSP processor performs synchronous operation; otherwise, the DSP processors do not perform synchronous operation. This technical solution can be implemented in a logic circuit using multiple OR gate cascades.
- each counter may also be driven by a plurality of synchronized clocks of the same source frequency, such as atomic clocks; or each DSP processor shares a counter, and so on.
- the present invention has been described above with reference to the application of the present invention to a MIMO communication device for wireless communication. It will be understood that the present invention is not limited thereto, and can be applied to any device having real-time distributed processing requirements, such as a multi-processor computer for real-time distributed computing such as network protocol emulation, routing calculation, and the like. Those skilled in the art can reasonably predict on the basis of the present invention that various real-time distributed systems are equivalent alternatives to the multi-antenna MIMO device involved in the embodiments of the present invention, and the present invention is equally applicable to these equivalent alternatives. the way.
- the embodiments of the present invention have been described above, and it is to be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications and changes within the scope of the appended claims.
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2011546562A JP5250703B2 (ja) | 2009-01-23 | 2009-01-23 | リアルタイム分散型システムの同期方法およびデバイス |
EP09838593.3A EP2391032B8 (en) | 2009-01-23 | 2009-01-23 | Synchronization method and device for real-time distributed system |
PCT/CN2009/000100 WO2010083626A1 (zh) | 2009-01-23 | 2009-01-23 | 用于实时分布式系统的同步方法及其装置 |
US13/142,742 US8495408B2 (en) | 2009-01-23 | 2009-01-23 | Synchronization method and device for real-time distributed system wherein each module sets an indicator to signal whether it is currently able to operate synchronously with other modules and resets the indicator at a unified synchronization end time |
KR1020117019581A KR101266747B1 (ko) | 2009-01-23 | 2009-01-23 | 실시간 분산 시스템의 분산 모듈에서, 다른 분산 모듈들과 동기적으로 동작하기 위해 사용되는 방법, 디바이스, 신호 프로세싱 디바이스 및 mimo 통신 장비 |
CN200980145432.9A CN102217207B (zh) | 2009-01-23 | 2009-01-23 | 用于实时分布式系统的同步方法及其装置 |
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EP (1) | EP2391032B8 (zh) |
JP (1) | JP5250703B2 (zh) |
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EP2391032A1 (en) | 2011-11-30 |
CN102217207B (zh) | 2014-04-30 |
EP2391032B8 (en) | 2019-12-11 |
EP2391032B1 (en) | 2019-11-06 |
KR20110110348A (ko) | 2011-10-06 |
CN102217207A (zh) | 2011-10-12 |
JP2012516079A (ja) | 2012-07-12 |
JP5250703B2 (ja) | 2013-07-31 |
US8495408B2 (en) | 2013-07-23 |
EP2391032A4 (en) | 2014-04-30 |
US20110274192A1 (en) | 2011-11-10 |
KR101266747B1 (ko) | 2013-05-22 |
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