WO2019105346A1 - Procédé et appareil de correction - Google Patents

Procédé et appareil de correction Download PDF

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Publication number
WO2019105346A1
WO2019105346A1 PCT/CN2018/117722 CN2018117722W WO2019105346A1 WO 2019105346 A1 WO2019105346 A1 WO 2019105346A1 CN 2018117722 W CN2018117722 W CN 2018117722W WO 2019105346 A1 WO2019105346 A1 WO 2019105346A1
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WO
WIPO (PCT)
Prior art keywords
rru
correction
control device
cluster
rrus
Prior art date
Application number
PCT/CN2018/117722
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English (en)
Chinese (zh)
Inventor
罗帆
李峰
刘越
严朝译
Original Assignee
华为技术有限公司
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Publication date
Priority claimed from CN201810966862.8A external-priority patent/CN109861765B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2020529640A priority Critical patent/JP2021505085A/ja
Priority to EP18884411.2A priority patent/EP3706336B1/fr
Priority to BR112020010925-8A priority patent/BR112020010925A2/pt
Priority to KR1020207018612A priority patent/KR102364575B1/ko
Publication of WO2019105346A1 publication Critical patent/WO2019105346A1/fr
Priority to US16/887,644 priority patent/US11121781B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a calibration method and apparatus.
  • JT coherent multi-point joint transmission
  • RRU cooperative remote radio unit
  • the traditional correction method is to use a RRU as a reference RRU, plan the correction path topology, and require the number of correction paths to be one less than the total number of RRUs.
  • FIG. 1 it is a correction path topology diagram of RRU1-RRU9, and a total of eight correction paths.
  • the number of correction path stages between two RRUs connected to each other is 1.
  • RRU1 is directly connected to RRU2, and RRU5 is directly connected to RRU9. Therefore, the number of correction path stages between RRU1 and RRU2 is 1, and between RRU5 and RRU9.
  • the number of correction path steps is 1.
  • RRU3 and RRU8 are indirectly connected through RRU1 and RRU2.
  • the number of correction path stages between RRU3 and RRU8 is 3, and RRU4 and RRU6 are indirectly connected through RRU1, RRU2, RRU3 and RRU5, so the correction between RRU4 and RRU6
  • the path level is 5.
  • the path information between the RRU2 and the RRU1 is obtained through the correction signal transmitted and received between the RRU2 and the RRU1, and the correction coefficient of the RRU2 compared to the RRU1 is calculated according to the path information.
  • the RRU2's transceiver channel response ratio is the same as the RRU1's transceiver channel response ratio.
  • the correction coefficient of the RRU3 is calculated based on the path information between the RRU2 and the correction coefficient of the RRU2, so that after the RRU3 compensates each channel by the correction coefficient, the response ratio of the RRU3 transceiver channel is the same as the response ratio of the RRU1. Similarly, the rest of the RRUs are based on the corrected path topology and so on.
  • the correction signal is transmitted through the air interface. Due to the influence of the air interface environment, when the correction coefficient is calculated based on the path information of each correction path, there is a certain correction error.
  • the correction error on the correction path of the multi-level connection will propagate, resulting in the accumulation of correction errors between the two RRUs with large correction path series.
  • the larger the number of correction paths between the two RRUs the relationship between the two RRUs.
  • the correction error is larger, resulting in a decrease in correction accuracy.
  • the present application provides a calibration method and apparatus, which can reduce the correction error between RRUs and improve the correction accuracy.
  • the application provides a calibration method, the method comprising:
  • the RRU control device receives the resource configuration information sent by the centralized control device, and the time-frequency resource indicated by the resource configuration information is used to send and receive a correction signal between the RRU and the n other RRUs, where the n other RRUs are determined by the centralized control device.
  • the number of stages of the correction path between the RRU and the RRU is 1.
  • the number of stages of the shortest correction path between any two RRUs in the correction path topology is less than or equal to a preset level threshold.
  • the RRU control device can acquire the correction coefficient of the RRU through the plurality of path information, thereby avoiding the accumulation of the correction error due to the propagation of the correction error on the multi-stage correction path, and
  • the number of stages of the shortest correction path between any two RRUs in the used correction path topology is less than or equal to the preset level threshold, thus reducing the correction error between the RRUs, thereby improving the correction accuracy.
  • the control device of the RRU acquires m correction coefficients according to the m group path information, including: the RRU control device calculates the m correction coefficients according to the m group path information; or; the RRU control device
  • the centralized control device transmits the m sets of path information such that the centralized control device calculates the m correction coefficients according to the m sets of path information; and the RRU control device receives the m correction coefficients sent by the centralized control device.
  • the m group path information is in one-to-one correspondence with the M channels
  • the m correction coefficients are in one-to-one correspondence with the M channels.
  • the correction between the channels in the RRU can be implemented by the method provided by the present application, and since the correction coefficients of each channel are based on multiple The path information is calculated. Therefore, the correction error accumulation caused by the propagation of the correction error on the multi-stage correction path is avoided, and the correction error between the RRUs is reduced, thereby improving the correction accuracy.
  • control device of the RRU controls the RRU to send and receive a correction signal on the time-frequency resource according to the resource configuration information, where the control device of the RRU controls the M channels according to the resource configuration information to be different in the M.
  • the correction signal is simultaneously sent to each of the other RRUs on the carrier resources, and the correction signals sent by the n other RRUs are simultaneously received on the n different frequency domain resources.
  • the resource configuration information further includes a calibration cluster number of the RRU, and the control device of the RRU controls, according to the resource configuration information, the RRU to send and receive a correction signal on the time-frequency resource, including: the control device of the RRU according to the The correction cluster number controls a correction signal corresponding to the correction cluster number sent by the RRU, and the correction signal sent by the RRU is orthogonal to the correction signal code sent by the RRU different from the correction cluster number of the RRU.
  • the resource utilization rate of the GP area can be improved, so that more correction signals can be transmitted between the N RRUs, thereby obtaining more path information improvement correction specifications of the correction path.
  • the RRU is an RRU in a sub-cluster
  • the method further includes: the RRU control device receives the inter-cluster correction coefficient, where the inter-cluster correction coefficient is a reference RRU in the sub-cluster in which the RRU is located relative to the reference sub-cluster
  • the correction coefficient of the reference RRU, the m correction coefficients are correction coefficients of the RRU relative to the reference RRU in the sub-cluster in which the RRU is located;
  • the control device of the RRU uses m correction coefficients to perform M channels of the RRU
  • the compensation comprises: the RRU control device multiplies the m correction coefficients by the inter-cluster correction coefficients to obtain m joint correction coefficients; the RRU control device compensates the M channels of the RRU by using m joint correction coefficients .
  • the RRU is an RRU in a sub-cluster
  • the method further includes: the RRU control device controls the RRU to send and receive a correction signal between the RRU and one of the other sub-clusters, and obtains the RRU and the other The path information of the inter-cluster correction path between one RRU in the sub-cluster, i ⁇ 1; the RRU control device acquires the inter-cluster correction coefficient according to the path information of the i correction paths; the RRU control device sets the inter-cluster The correction coefficient is sent to the control device of the other RRUs in the sub-cluster in which the RRU is located; the control device of the RRU uses m correction coefficients to compensate the M channels of the RRU, including: the RRU control device sets m correction coefficients Multiply the inter-cluster correction coefficients to obtain m joint correction coefficients.
  • the present application provides a method for correcting a radio remote unit, the method comprising: the centralized control device determining a corrected path topology according to a signal quality between the N RRUs, where the signal quality is greater than or equal to The number of stages of the correction path between the two RRUs of the preset signal quality threshold is 1, and the number of stages of the shortest correction path between any two RRUs is less than or equal to a preset level threshold; the centralized control device according to the correction The path topology, the time-frequency resource is allocated to each of the R RRUs, and the configuration information for indicating the corresponding time-frequency resource is sent to the control device of each RRU, where the time-frequency resource corresponding to each RRU is used.
  • the RRU sends and receives a correction signal.
  • the control device of each RRU can acquire the correction coefficient of the RRU through multiple path information, thereby avoiding the correction error on the multi-level correction path. The accumulation of correction errors caused by the propagation, thereby reducing the correction error between the RRUs and improving the correction accuracy.
  • the method further includes: receiving, by the centralized control device, the N1 sent by the control device of the N RRUs Path information, which is path information of a correction path whose level of the correction path is 1. Indicates that when the number of correction path stages between any two RRUs of the N RRUs is 1, the total number of correction paths, N1 is an integer; the centralized control device calculates a corresponding to each RRU according to the N1 path information. a correction coefficient; the centralized control device transmits a corresponding correction coefficient to the control device of each RRU.
  • each correction coefficient of each RRU is calculated based on the N1 path information, thereby eliminating the propagation of the correction error, thereby reducing the correction error between the RRUs and improving the correction accuracy.
  • the method further includes: the centralized control device dividing the N RRUs into at least two correction clusters
  • the resource configuration information sent by the centralized control device to each RRU further includes a corrected cluster number of the calibration cluster where the RRU is located.
  • the resource utilization rate of the GP area can be improved, so that more correction signals can be transmitted between the N RRUs, thereby obtaining more path information improvement correction specifications of the correction path.
  • the method further includes: the centralized control device periodically detecting signal quality between the N RRUs; when a signal quality between any two RRUs of the N RRUs is greater than or equal to the signal quality When the threshold is changed to be less than the signal quality threshold, the centralized control device re-determines the correction topology.
  • the correction path By periodically detecting the signal quality between the N RRUs, the correction path whose signal quality does not meet the requirements of the signal quality threshold is found in time, and the corrected path topology is re-planned. In order to avoid the disconnection of a certain correction path due to environmental influences, the path is corrected and the JT performance is affected.
  • the method further includes: the centralized control device divides the K RRUs into k sub-clusters, and among the h sub-clusters of the k sub-clusters Each sub-cluster includes one reference RRU, and k sub-clusters include at least one reference sub-cluster, and the N RRUs are all RRUs in one of the k sub-clusters.
  • the centralized control device receives path information of the inter-cluster correction path sent by the at least one RRU in each sub-cluster; the centralized control device calculates at least one of each sub-cluster according to the path information of all the inter-cluster correction paths received.
  • a control device for an RRU includes:
  • a transceiver unit configured to receive resource configuration information sent by the centralized control device, where the time-frequency resource indicated by the resource configuration information is used to send and receive a correction signal between the RRU and the n other RRUs, where the n other RRUs are in the centralized control device
  • the number of stages of the correction path between the RRU and the RRU is 1, and the number of stages of the shortest correction path between any two RRUs in the corrected path topology is less than or equal to a preset level threshold.
  • n is a natural number greater than or equal to 1; the processing unit is configured to: according to the resource configuration information received by the receiving unit, control the RRU to send and receive a correction signal on the time-frequency resource; and obtain the correction signal according to the RRU
  • the processing unit acquires m correction coefficients according to the m group path information, and specifically includes: calculating the m correction coefficients according to the m group path information; or sending the m group path information to the centralized control device, so that The centralized control device calculates the m correction coefficients according to the m group path information, and receives the m correction coefficients sent by the centralized control device.
  • the m group path information is in one-to-one correspondence with the M channels
  • the m correction coefficients are in one-to-one correspondence with the M channels.
  • the processing unit controls the RRU to send and receive the correction signal on the time-frequency resource, and specifically includes: controlling, according to the resource configuration information, the M channels to simultaneously on different M carrier resources
  • Each of the other RRUs transmits a correction signal and simultaneously receives correction signals transmitted by the n other RRUs on n different frequency domain resources.
  • the resource configuration information further includes a calibration cluster number of the RRU
  • the processing unit controls the RRU to send and receive the correction signal on the time-frequency resource according to the resource configuration information, where the method further includes: controlling, according to the calibration cluster number, the RRU transmission.
  • the correction signal corresponding to the correction cluster number is orthogonal to the correction signal code sent by the RRU different from the correction cluster number of the RRU.
  • the RRU is an RRU in a sub-cluster
  • the processing unit is further configured to receive an inter-cluster correction coefficient, where the inter-cluster correction coefficient is a reference RRU in the sub-cluster in which the RRU is located, relative to the reference sub-cluster
  • the m correction coefficients are correction coefficients of the RRU relative to the reference RRU in the sub-cluster in which the RRU is located
  • the processing unit uses the m correction coefficients to compensate the M channels of the RRU, Specifically, the m correction coefficients are respectively multiplied by the inter-cluster correction coefficient to obtain m joint correction coefficients; and the M joint correction coefficients are used to compensate the M channels of the RRU.
  • the RRU is an RRU in a sub-cluster
  • the transceiver unit is further configured to control sending and receiving a correction signal between the RRU and one of the other sub-clusters, and acquiring the RRU and the other sub-clusters.
  • the present application provides a centralized control apparatus, including:
  • a determining unit configured to determine a corrected path topology according to a signal quality between the N RRUs, where the number of the correction paths between the two RRUs whose signal quality is greater than or equal to the preset signal quality threshold is 1 And the number of stages of the shortest correction path between any two RRUs is less than or equal to a preset level threshold;
  • the sending unit is configured to use the corrected path topology determined according to the determining unit, and is used in the N RRUs
  • a time-frequency resource is allocated to each RRU, and configuration information for indicating a corresponding time-frequency resource is sent to the control device of each RRU, and the time-frequency resource corresponding to each RRU is used for the RRU transceiver correction signal.
  • the centralized control device further includes: a receiving unit and a calculating unit, and the receiving unit is configured to receive the N1 path information transmitted by the control devices of the N RRUs, the path information being path information of the correction path having the number of stages of the correction path being 1, N1 is an integer; the calculating unit is configured to calculate, according to the N1 path information received by the receiving unit, a correction coefficient corresponding to each RRU; the sending unit is further configured to send a corresponding to the control device of each RRU Correction factor.
  • the determining unit is further configured to: after the sending unit allocates time-frequency resources to each of the N RRUs according to the corrected path topology, divide the N RRUs into at least two calibration clusters;
  • the resource configuration information sent by the sending unit to each RRU further includes a corrected cluster number of the correction cluster where the RRU is located.
  • the centralized control device further includes a detecting unit, configured to periodically detect a signal quality between the N RRUs, and the determining unit is further configured to: when the detecting unit detects the N RRUs The correction path topology is re-determined when the signal quality between any two of the RRUs changes from greater than or equal to the signal quality threshold to less than the signal quality threshold.
  • the determining unit is further configured to divide the K RRUs into k sub-clusters, and the h sub-clusters of the k sub-clusters, before determining the corrected path topology according to the signal quality between the N RRUs.
  • Each of the sub-clusters includes a reference RRU, and the k sub-clusters include at least one reference sub-cluster, and the N RRUs are all RRUs in one of the k sub-clusters.
  • the RRUs in each sub-cluster are synchronized to perform intra-cluster correction to speed up the correction.
  • the receiving unit is further configured to receive path information of an inter-cluster correction path sent by at least one RRU in each sub-cluster; the calculating unit is further configured to receive, according to the receiving unit, all The path information of the inter-cluster correction path calculates an inter-cluster correction coefficient corresponding to each of the at least one RRU in each of the sub-clusters; the transmitting unit is further configured to: at least one RRU in each of the sub-clusters Each RRU in the transmission sends a corresponding inter-cluster correction coefficient.
  • the present application further provides a control apparatus for an RRU, including: a processor, a memory, a bus, and a transceiver; the memory is configured to store a computer to execute an instruction; the processor, the memory and the transceiver are transmitted through the bus
  • the processor is coupled to execute, when the control device of the RRU is in operation, the computer-executable instructions stored in the memory to implement the first aspect and the correction method of the various implementations of the first aspect.
  • the present application further provides a centralized control apparatus, including: a processor, a memory, a bus, and a transceiver; the memory for storing a computer to execute an instruction; the processor, the memory and the transceiver through the bus Connecting, when the centralized control device is in operation, the processor executes computer executed instructions stored in the memory to implement the second aspect and the correction method described in various implementations of the second aspect.
  • a centralized control apparatus including: a processor, a memory, a bus, and a transceiver; the memory for storing a computer to execute an instruction; the processor, the memory and the transceiver through the bus Connecting, when the centralized control device is in operation, the processor executes computer executed instructions stored in the memory to implement the second aspect and the correction method described in various implementations of the second aspect.
  • the present application further provides a computer storage medium having instructions stored therein that, when run on a computer, cause the computer to perform the method of the first aspect or the second aspect.
  • the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect or the eighth aspect described above.
  • the application provides a communication device comprising means or means for performing the various steps of the first aspect and/or the second aspect.
  • the communication device can be a chip.
  • FIG. 1 is a schematic diagram of a correction path topology in the prior art
  • 2A is a schematic diagram of a distributed base station system provided by the present application.
  • 2B is a schematic diagram of a communication system provided by the present application.
  • FIG. 3 is a first flowchart of a method for correcting a method according to an embodiment of the present application
  • FIG. 4 is a schematic diagram 1 of a correction path topology provided by the present application.
  • FIG. 5 is a second flowchart of a method for correcting a method according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram 2 of a correction path topology provided by the present application.
  • FIG. 7 is a third flowchart of a method for correcting a method according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of comparison of resource usage of a GP area provided by the present application.
  • 9A is a schematic structural diagram 1 of a control device for an RRU provided by the present application.
  • 9B is a schematic structural diagram 2 of a control apparatus for an RRU provided by the present application.
  • 9C is a schematic structural diagram 3 of a control device for an RRU provided by the present application.
  • 10A is a schematic structural view 1 of a centralized control device provided by the present application.
  • 10B is a schematic structural view 2 of a centralized control device provided by the present application.
  • 10C is a schematic structural view 3 of a centralized control device provided by the present application.
  • FIG. 11 is a schematic diagram of a sub-cluster division provided by the present application.
  • FIG. 12 is a schematic diagram of time-frequency resource allocation between sub-clusters provided by the present application.
  • the correction method provided by the present application can be applied to an LTE system, LTE advanced (LTE-A), or other wireless communication systems using various radio access technologies, for example, using code division multiple access, frequency division multiple access, Time division multiple access, orthogonal frequency division multiple access, CA and other access technology systems.
  • LTE-A LTE advanced
  • CA orthogonal frequency division multiple access
  • CA orthogonal frequency division multiple access
  • the calibration method provided by the present application may be applied to a distributed base station, as shown in FIG. 2A, including an RRU, an indoor baseband unit (BBU), a coupling circuit, and an antenna.
  • a distributed base station including an RRU, an indoor baseband unit (BBU), a coupling circuit, and an antenna.
  • BBU indoor baseband unit
  • the RRU includes a digital intermediate frequency module, a transceiver module, a power amplifier, and a filtering module.
  • the digital intermediate frequency module is used for modulation and demodulation of optical transmission, digital up-conversion, analog-to-digital (AD) converter, etc.
  • the transceiver module completes conversion of the intermediate frequency signal to the radio frequency signal; and then passes through the power amplifier and the filtering module.
  • the RF signal is transmitted through the antenna port.
  • the BBU is used to complete functions such as channel codec, baseband signal modulation and demodulation, protocol processing, and the like, and provides interface functions with the upper layer network element, and completes the processing process of the physical layer core technology, such as code division multiple access in 3G.
  • a channel is connected between the BBU, the RRU, and the antenna.
  • a coupling circuit is used to compensate for each channel.
  • a BBU can control at least one RRU, and the BBUs are directly connected by wire.
  • a communication system provided by the present application includes a centralized control device, a control device of an RRU, and an RRU.
  • the RRU control device is configured to control the RRU to send and receive the correction signal, collect the path information of the correction path, calculate the correction coefficient of the controlled RRU, and compensate the RRU transmission and reception channel.
  • control device of the RRU may be a BBU connected to the RRU, or may be a control module integrated in the RRU, or may be a server device capable of implementing the above functions independently of the RRU.
  • the centralized control device is configured to implement a planned correction topology path, plan a correction cluster, allocate a time-frequency resource for transmitting a correction signal, calculate a correction coefficient, and the like.
  • the centralized control device may be a server device or a communication device capable of implementing the above functions. It may also be a control device of an RRU, that is, a control device of one RRU is used as the centralized control device. In this case, the control device of the RRU has the function of a centralized control device.
  • FIG. 2 is a flowchart of a method for an embodiment of a correction method provided by the present application, and the method includes the following steps:
  • Step 301 The centralized control device determines, according to the signal quality between the N RRUs, a corrected path topology, where the number of levels of the correction path between the two RRUs whose signal quality is greater than or equal to the preset signal quality threshold is 1, and the number of stages of the shortest correction path between any two RRUs is less than or equal to the preset level threshold.
  • the centralized control device may first establish a direct connection relationship between all the RRUs in the N RRUs whose signal quality is greater than or equal to the signal quality threshold, so that all signal qualities are greater than or
  • the number of stages of the correction path between the two RRUs equal to the signal quality threshold is one. That is, each RRU can establish a direct connection relationship with all RRUs with a signal quality greater than or equal to a signal quality threshold between the RRUs, so that the number of stages of the shortest correction path between any two RRUs in the N RRUs is Less than or equal to the threshold of the series.
  • the centralized control device detects that the signal quality between RRU1 and RRU2, RRU 5, RRU7, and RRU8 is greater than or equal to the signal quality threshold, and the signal quality between RRU2 and RRU8, RRU6, and RRU3 is greater than or Equal to the signal quality threshold, the signal quality between RRU3 and RRU5 and RRU4 is greater than or equal to the signal quality threshold, the signal quality between RRU4 and RRU6 is greater than or equal to the signal quality threshold, and the signal quality between RRU5 and RRU6 and RRU9. If the signal quality is greater than or equal to the signal quality threshold, the signal quality between the RRU 6 and the RRU 9 is greater than or equal to the signal quality threshold, and the signal quality between the RRU 7 and the RRU 9 is greater than or equal to the signal threshold.
  • the centralized control device establishes a direct connection relationship between the two RRUs whose signal quality is greater than or equal to the quality threshold, so that the number of the correction paths connected between the two RRUs is 1, and the correction shown in FIG. 4 is obtained. Path topology.
  • the centralized control device determines that in the corrected path topology as shown in FIG. 4, the number of stages of the shortest correction path between any two RRUs is less than four. Therefore, the correction path topology as shown in FIG. 4 determines the correction path topology used in this correction process.
  • the number of stages of the correction path of the RRU 6 and the RRU 4 in the prior art is 5, and the number of stages of the shortest correction path between the RRU 6 and the RRU 4 in the present application is 1, that is, the RRU 6 And RRU4 can also be a direct connection. Therefore, with the correction path topology provided by the present application, the number of stages of the shortest correction path between the RRU and the RRU can be reduced.
  • Step 302 The centralized control device allocates time-frequency resources for each RRU of the N RRUs according to the corrected path topology, and sends resource configuration information for indicating corresponding time-frequency resources to each RRU control device, and each The time-frequency resource corresponding to the RRU is used for the RRU transceiver correction signal.
  • the N RRUs After receiving the corresponding resource configuration information, the N RRUs perform the following steps 303-305.
  • Step 303 The RRU control device controls the RRU to send and receive a correction signal on the corresponding time-frequency resource according to the received resource configuration information.
  • the RRU control device receives the resource configuration information corresponding to the RRU, the RRU can control the RRU to send and receive a correction signal to the n other RRUs on the time-frequency resource indicated by the resource configuration information.
  • the RRU control device can control any one of the M channels and the The n other RRUs perform transmission and reception of the correction signal.
  • the RRU can send and receive correction signals in a frequency division manner. That is, when the RRU sends a correction signal to n other RRUs, the RRU sends correction signals to the n other RRUs in the same time domain resource and the same frequency domain resource. When the RRU receives the correction signals sent by the n other RRUs, it receives the correction signals sent by the n other RRUs in the same time domain resource and n different frequency domain resources, that is, n other RRUs in n different frequency domain resources. A correction signal is simultaneously sent to the RRU.
  • the RRU control device may control each of the M channels to perform a correction signal with the n other RRUs. Send and receive.
  • control device of the RRU may control, according to the resource configuration information, the M channels to simultaneously send corrections to each of the other RRUs on different M carrier (or subcarrier) resources. Signaling, and simultaneously receiving correction signals sent by the n other RRUs on n different frequency domain resources. That is, when n other RRUs are transmitting to the M channels, the correction signals are simultaneously transmitted on n different frequency domain resources, and each of the M channels is different at the same time. A correction signal sent by n other RRUs is detected on the frequency domain resource.
  • the control device of the RRU can notify the centralized control device by using a message, whether the M channels of the RRU need to be corrected, so that the centralized control device can allocate an appropriate amount. Time-frequency resources.
  • the path information may include information such as a signal received by a channel at both ends of the correction path and an air interface channel response.
  • the RRU control device may acquire the M group path information according to the correction signal sent and received by the RRU, and the M group path information is in one-to-one correspondence with the M channels.
  • Step 305 The RRU control device acquires m correction coefficients according to the m group path information.
  • control device of the RRU may calculate the m correction coefficients according to the m group path information.
  • the RRU control device can calculate a correction coefficient based on the n path information and the transmission and reception channel response reference value. After the control unit of the RRU compensates the M channels of the RRU by using the correction coefficient, the response ratio of the transceiver channel of the M channels is equal to or equal to the response reference value of the transceiver channel.
  • the RRU control device may perform joint calculation according to the m*M path information and the transceiver channel response reference value, and obtain M correction coefficients corresponding to the M channels one by one. After the control unit of the RRU compensates the M channels of the RRU by using the M correction coefficients, the response ratio of the transceiver channels of the M channels is equal to or equal to the response reference value of the transceiver channel.
  • the response value of the transceiver channel response may be a preset value, or may be a response ratio of the transceiver channel of one of the N RRUs.
  • Step 306 the control device of the RRU uses the m correction coefficients to compensate M channels of the RRU.
  • the process of the RRU's control device compensating for M channels may be: when a channel receives a signal as a receiving channel, the received signal may be multiplied by a corresponding correction coefficient.
  • the transmitted signal can be divided by the corresponding correction factor.
  • the m correction coefficients acquired by the control device of the RRU in the above step 305 may also be calculated by the centralized control device.
  • the foregoing step 305 may specifically include:
  • step 305a the control device of the RRU transmits the m group path information to the centralized control device.
  • Step 305b After receiving the N1 path information sent by the control devices of the N RRUs, the centralized control device calculates a correction coefficient corresponding to each RRU according to the N1 path information.
  • N1 is the total number of all path information sent by the control devices of the N RRUs, Indicates that when the number of correction path stages between any two of the N RRUs is 1, the total number of correction paths, N1 is an integer.
  • the centralized control device may jointly calculate the N1 path information by using the transceiver channel response reference value to obtain m correction coefficients corresponding to each RRU. That is to say, in this example, each correction coefficient of each RRU is calculated based on the N1 path information, thereby eliminating the propagation of the correction error, thereby reducing the correction error between the respective RRUs and improving Correction accuracy.
  • step 305c the centralized control device sends a corresponding correction coefficient to each RRU.
  • the centralized control device may periodically detect the signal quality between the N RRUs. And when the signal quality between any two RRUs of the N RRUs is changed from being greater than or equal to the signal quality threshold to less than the signal quality threshold, the centralized control device may be based on the N RRUs detected in the period. Between the signal quality, re-determine the new correction path topology, and re-execute the process in steps 301-306 above.
  • the current correction path topology is as shown in FIG. 4, and the centralized control device periodically detects the signal quality of the RRU1-RRU9. It is assumed that the centralized control device detects the signal quality between RRU1 and RRU7 in the current cycle, and the signal quality between RRU9 and RRU6 changes from greater than the signal quality threshold to less than the signal quality threshold. The signal quality between RRU7 and RRU8 is greater than the signal threshold. The centralized control device disconnects the direct connection between RRU1 and RRU7, and the direct connection between RRU9 and RRU6, and establishes the direct connection between RRU7 and RRU8, and obtains the updated corrected path topology, as shown in Figure 6. Shown.
  • the correction signal used in the present application may be A calibration sequence with code division function.
  • the method further includes:
  • Step 307 the centralized control device divides the N RRUs into at least two correction clusters.
  • the centralized control device may first divide the N RRUs into at least two correction clusters, and the RRUs in different correction clusters have orthogonal code division function correction signals, so the RRUs in different correction clusters can be in the same frequency of the same GP.
  • the domain resources send correction signals without causing interference with each other.
  • the foregoing step 303 may specifically include:
  • Step 303a The control device of the RRU controls the correction signal corresponding to the corrected cluster number sent by the RRU according to the corrected cluster number carried in the received configuration resource.
  • the RRU control device may generate a correction signal having a code division function according to the correction cluster number.
  • the control device of the RRU may also send the correction cluster number to the RRU, and the RRU generates a correction signal having a code division function according to the correction cluster number.
  • the RRU control device or the RRU may pre-store the correspondence between the corrected cluster number and the correction signal, and the control device of the RRU may also select the corresponding correction signal according to the corrected cluster number, or send the corrected cluster number to The RRU selects a corresponding correction signal from the RRU according to the corrected cluster number.
  • RRU 6 sends a correction signal to RRU3 and RRU9, and RRU1 transmits a correction signal to RRU2, RRU5, RRU8, and RRU7.
  • RRU6 and RRU5 need to transmit correction signals in different GP areas, that is, occupy two GP area resources to transmit correction signals. If the correction signals of RRU6 and RRU5 have orthogonal characteristics. Then RRU6 and RRU5 can send correction signals in both GP1 areas, and only need to occupy 1 GP area resource.
  • the resource utilization rate of the GP area can be improved, so that more correction signals can be transmitted between the N RRUs, thereby obtaining more path information of the correction path and improving the correction specification.
  • the RRU may demodulate the received sequence according to the corrected cluster number of the correction cluster in which the RRU is located, and obtain the other RRU transmission.
  • the RRU is corrected for the signal.
  • the control device of each RRU can obtain the correction coefficient of the RRU through multiple path information, thereby avoiding the multi-level correction path.
  • the correction error is accumulated due to the propagation of the correction error, thereby reducing the correction error between the RRUs, thereby improving the correction accuracy.
  • the present application further provides a method for dividing a large-scale RRU into multiple sub-clusters, and the RRUs in each sub-cluster are synchronized in the cluster. Correction to speed up the calibration.
  • the centralized control device divides the K RRUs to be corrected into k sub-clusters, and each of the h sub-clusters in the k sub-clusters includes a reference RRU, the k sub-clusters. At least one reference sub-cluster is included. The reference subcluster is used for inter-cluster correction for other non-reference subclusters.
  • k RRUs are divided into 5 sub-clusters, wherein sub-cluster 1 is a reference sub-cluster, and reference RRUs in the sub-cluster 1 are inter-cluster correction for other sub-cluster RRU.
  • Subclusters 1-5 each include a reference RRU.
  • Each of the RRUs within the sub-cluster 1-5 can correct the respective channels by acquiring correction coefficients relative to the reference RRUs within the sub-cluster when performing intra-cluster correction.
  • the corrected path topology can be planned, including planning the corrected path topology of each RRU in each sub-cluster, and correcting the path topology between the clusters.
  • the resource allocation is then performed according to the planned correction path.
  • the centralized control device is the RRU1 in the sub-cluster 1.
  • the time-frequency resources allocated by the RRU and the RRU3 include time-frequency resources for transmitting and receiving correction signals between the RRUs in the other sub-clusters, and time-frequency resources for transmitting and receiving correction signals to and from other RRUs in the sub-cluster 1.
  • the time-frequency resource allocated by the centralized control device for the RRU 3 in the sub-cluster 1 is used to transmit and receive a correction signal with other RRUs in the sub-cluster 1.
  • the resource configuration information may include information such as a cluster number of a sub-cluster in which each RRU is located, an identifier of a reference RRU, a cluster number of a reference sub-cluster, and an identifier of a reference RRU in the reference sub-cluster.
  • the centralized control device may configure each RRU in each sub-cluster to send and receive a correction signal in a frequency division manner, and send and receive a correction signal in a time division manner between the k sub-clusters.
  • each sub-cluster includes g RRUs, as shown in the left diagram of FIG. 12, g RRUs in each sub-cluster are simultaneously transmitted and corrected on j (g ⁇ j ⁇ 2) different sub-carriers, respectively. signal.
  • Each of the k sub-clusters (e.g., each of the k sub-clusters) sequentially transmits a correction signal on the same sub-carrier.
  • the centralized control device may also configure each RRU in each sub-cluster to transmit and receive a correction signal in a time division manner, and transmit and receive a correction signal in a frequency division manner between the k sub-clusters.
  • each of the k sub-clusters eg, each RRU1 of k sub-clusters, each RRU2 of k sub-clusters, ..., each RRUi of k sub-clusters
  • the correction signal is transmitted simultaneously on j different subcarriers.
  • the g RRUs in each sub-cluster sequentially send correction signals on the same sub-carrier.
  • each RRU in each sub-cluster can perform intra-cluster correction according to the correction method as shown in FIG. 3, 5 or 7 when intra-cluster correction is performed. That is, in the embodiment shown in FIG. 3, 5 or 7, the N RRUs are all RRUs in one sub-cluster, and in one sub-cluster, the N RRUs are implemented as shown in FIG. 3, 5 or 7.
  • the path information is added, the correction coefficient to the reference RRU in the sub-cluster is obtained, and the correction is completed.
  • each RRU in each sub-cluster may also calculate the correction coefficient to the reference RRU in the sub-cluster in a conventional manner according to the multi-level correction path, and complete the correction.
  • each sub-cluster can be regarded as one RRU, and the correction between k sub-clusters is completed according to the correction manner for k RRUs.
  • the correction between the k sub-clusters can also be corrected for the k sub-clusters according to the above-described correction process for the N RRUs in the embodiment shown in FIG. 3, 5 or 7.
  • the control device of the RRU acquires m correction coefficients when the RRU is performing intra-cluster correction (ie, the reference of the RRU relative to the sub-cluster in which the RRU is located)
  • intra-cluster correction ie, the reference of the RRU relative to the sub-cluster in which the RRU is located
  • an inter-cluster correction coefficient ie, a correction coefficient of the reference RRU in the sub-cluster in which the RRU is located with respect to the reference RRU in the reference sub-cluster.
  • the control device of the RRU can acquire inter-cluster correction coefficients by means of reception. For example, receiving an inter-cluster correction coefficient sent by a control device of another RRU in the sub-cluster in which the RRU is located, the other RRU is an RRU located on the inter-cluster correction path and completing the inter-cluster correction coefficient.
  • the control device of the RRU may receive the inter-cluster correction coefficient sent by the control device of one RRU in the upper-level sub-cluster of the sub-cluster in which the RRU is located.
  • the corresponding inter-cluster correction coefficient can be directly received from the centralized control device.
  • At least one RRU located in the inter-cluster correction path in each sub-cluster acquires an inter-cluster correction path according to a time-frequency resource transceiving correction signal allocated by the centralized control device.
  • Path information, and the obtained path information of the inter-cluster correction path is sent to the centralized control device.
  • the centralized control device calculates an inter-cluster correction coefficient corresponding to each RRU in at least one RRU in each sub-cluster according to path information of all received inter-cluster correction paths, and then to at least one RRU in the sub-cluster Each RRU transmits a corresponding inter-cluster correction coefficient.
  • the RRU control device may also calculate the inter-cluster correction coefficient by itself. Assuming that the i(i ⁇ 1) inter-cluster correction path corresponds to one other sub-cluster, the RRU control device needs to control the transceiving correction between the RRU and one of the other sub-clusters.
  • the signal acquires path information of the inter-cluster correction path between the RRU and one of the other sub-clusters.
  • the control device of the RRU acquires inter-cluster correction coefficients based on path information of the inter-cluster correction paths.
  • the inter-cluster correction coefficient needs to be sent to the control device of the other RRU in the sub-cluster in which the RRU is located, and is used for inter-cluster correction by other RRUs.
  • the MRU After the MRU obtains m correction coefficients and inter-cluster correction coefficients, when M channels of the RRU are compensated, the m correction coefficients may be respectively multiplied by the inter-cluster correction coefficients to obtain m joint corrections. The coefficients are then compensated for the M channels of the RRU using the m joint correction coefficients.
  • each network element such as a control device of a RRU, a centralized control device, etc.
  • each network element includes hardware structures and/or software modules corresponding to the execution of the respective functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • the application may divide the function module of the RRU control device and the centralized control device according to the above method example.
  • each function module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the present application is schematic, and is only a logical function division, and may be further divided in actual implementation.
  • FIG. 9A shows a possible structural diagram of the control device of the RRU involved in the foregoing embodiment.
  • the RRU control device includes: a transceiver unit 901 and a processing unit 902. .
  • the transceiver unit 901 is configured to support the control unit of the RRU to perform step 302 in FIG. 3, FIG. 5 and FIG. 7;
  • the processing unit 902 is configured to support the control unit of the RRU to perform steps 303-306 in FIG. 3, step 303 in FIG. , 304, 305a, 305c, 306, and steps 303a, 304-306 of FIG. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • FIG. 9B shows a possible structural diagram of the control device of the RRU involved in the above embodiment.
  • the control device of the RRU includes a processing module 911 and a communication module 912.
  • the processing module 911 is configured to control and manage the actions of the RRU control device.
  • the processing module 911 is configured to support the RRU control device to perform steps 302-306 in FIG. 3, steps 302-304, 305a, and 305c in FIG. 306, steps 302, 303a, 304-306 in FIG. 7, and/or other processes for the techniques described herein.
  • the communication module 912 is configured to support communication between the RRU's control device and other network entities.
  • the control device of the RRU may further include a storage module 913 for storing program codes and data of the control device of the RRU.
  • the processing module 911 can be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (application-specific). Integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication module 912 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 913 can be a memory.
  • the control device of the RRU involved in the present application may be the control device of the RRU shown in FIG. 9C.
  • the control device of the RRU includes a processor 921, a transceiver 922, a memory 923, and a bus 924.
  • the transceiver 922, the processor 921, and the memory 923 are connected to each other through a bus 924.
  • the bus 924 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. Wait.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • Wait The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9C, but it does not mean that there is only one bus or one type of bus.
  • FIG. 10A shows a possible structural diagram of the centralized control apparatus involved in the foregoing embodiment, where the centralized control apparatus includes: a determining unit 1001, a sending unit 1002, and a calculation.
  • the determining unit 1001 is configured to support the centralized control device to perform step 301 in FIG. 3, FIG. 5, FIG. 7;
  • the transmitting unit 1002 is configured to support the centralized control device to perform step 302 in FIG. 3 and FIG. 7, step 305c in FIG. 5;
  • the computing unit 1003 is configured to support the centralized control device to perform step 305b in FIG. 5;
  • the receiving unit 1004 is configured to support the centralized control device to perform step 305a in FIG.
  • the detecting unit is configured to support the centralized control device to perform step 307 in FIG. 7. .
  • All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • FIG. 10B shows a possible structural diagram of the centralized control device involved in the above embodiment.
  • the centralized control device includes a processing module 1011 and a communication module 1012.
  • the processing module 1011 is configured to control and manage the actions of the centralized control device.
  • the processing module 1011 is configured to support the steps 301-302 of the centralized control device execution 3, steps 301-302, 305a-305c in FIG. 5, FIG. Steps 307, 301-302, and/or other processes for the techniques described herein.
  • the communication module 1012 is configured to support communication between the centralized control device and other network entities.
  • the centralized control device may further include a storage module 1013 for storing program codes and data of the centralized control device.
  • the processing module 1011 may be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication module 1011 may be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 1013 may be a memory.
  • the processing module 1011 is a processor
  • the communication module 1012 is a transceiver
  • the storage module 1013 is a memory
  • the centralized control device involved in the present application may be the centralized control device shown in FIG. 10C.
  • the centralized control device includes a processor 1021, a transceiver 1022, a memory 1023, and a bus 1023.
  • the transceiver 1022, the processor 1021, and the memory 1023 are connected to each other through a bus 1024; the bus 1024 may be a PCI bus or an EISA bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 10C, but it does not mean that there is only one bus or one type of bus.
  • the present application also provides a communication device comprising means or means for performing the various steps performed by the control device and/or the centralized control device of the RRU described above.
  • the communication device can be a chip.
  • the present application further provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments of the correction method provided by the application.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • the present application also provides a computer program product comprising instructions which, when executed on a computer, cause the computer to perform some or all of the steps of the various embodiments of the correction methods provided herein.
  • the technology in the embodiments of the present application can be implemented by means of software plus a necessary general hardware platform.
  • the technical solution in the embodiments of the present application may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present application or portions of the embodiments.
  • a computer device which may be a personal computer, server, or network device, etc.

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  • Physics & Mathematics (AREA)
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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de correction se rapportant au domaine technique de la communication, et capables de réduire l'erreur de correction entre des RRU et d'accroître la précision de correction. Le procédé comporte les étapes consistant à: faire recevoir par un appareil de commande de RRU des informations de configuration de ressources émises par un appareil de commande centralisée, les ressources temps-fréquence indiquées par les informations de configuration de ressources étant utilisées pour émettre et recevoir des signaux de correction entre ladite RRU et n autres RRU, les n autres RRU étant des RRU écartées d'un niveau par rapport à ladite RRU dans le trajet de correction de la topologie de trajet de correction, et le nombre de niveaux du plus court trajet de correction entre deux RRU quelconques dans la topologie de trajet de correction étant inférieur ou égal à un seuil de niveaux; sur la base des informations de configuration de ressources, commander ladite RRU pour émettre et recevoir des signaux de correction sur les ressources temps-fréquence; sur la base des signaux de correction émis et reçus par ladite RRU, acquérir m ensembles d'informations de trajet; sur la base des m ensembles d'informations de trajet, acquérir m coefficients de correction; et utiliser les m coefficients de correction pour compenser M canaux de ladite RRU.
PCT/CN2018/117722 2017-11-30 2018-11-27 Procédé et appareil de correction WO2019105346A1 (fr)

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JP2020529640A JP2021505085A (ja) 2017-11-30 2018-11-27 較正方法および装置
EP18884411.2A EP3706336B1 (fr) 2017-11-30 2018-11-27 Procédé et appareil de correction
BR112020010925-8A BR112020010925A2 (pt) 2017-11-30 2018-11-27 método de calibração, aparelho de controle centralizado e aparelho, e aparelho de controle de uma unidade de rádio remota
KR1020207018612A KR102364575B1 (ko) 2017-11-30 2018-11-27 교정 방법 및 장치
US16/887,644 US11121781B2 (en) 2017-11-30 2020-05-29 Calibration method and apparatus

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CN201711243924 2017-11-30
CN201810966862.8A CN109861765B (zh) 2017-11-30 2018-08-23 一种校正方法及装置
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CN103107836A (zh) * 2011-11-10 2013-05-15 中国移动通信集团公司 一种天线校准方法及装置
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