WO2015139192A1 - 一种ue间互易性校正的方法、装置及通信系统 - Google Patents
一种ue间互易性校正的方法、装置及通信系统 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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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
- H04B17/14—Monitoring; Testing of transmitters for calibration of the whole transmission and reception path, e.g. self-test loop-back
-
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
Definitions
- the present invention relates to the field of communications, and in particular, to a method, device, and communication system for reciprocity correction between UEs.
- LTE Long Term Evolution
- FDD Frequency Division Duplex
- uplink and downlink in TDD system The channel uses the same frequency band, so that the downlink channel can be estimated according to the uplink channel in the TDD system, thereby improving the transmission performance of the downlink channel, and the TDD system is widely used.
- the antennas of the base station and the UE have an independent receiving link and a transmitting link in the actual TDD system, and the channel reciprocity is only applicable to the spatial propagation channel, it is not in the actual TDD system.
- slight uplink and downlink channel reciprocity errors can lead to significant changes in the performance of the communication system. Therefore, the reciprocity correction of the antenna must be performed before using the TDD channel reciprocity characteristics.
- Embodiments of the present invention provide a method, apparatus, and communication system for inter-UE reciprocity correction, which can correct reciprocity errors between UEs, thereby ensuring performance of the communication system.
- a method for reciprocity correction between UEs including: The communication device sends a first reference signal to the first user equipment UE, so that the first UE estimates the first channel information of the first channel between the first UE and the communication device according to the first reference signal;
- the reciprocity correction is performed based on the first channel information and the second channel information.
- the method before the communications device is the second UE, before the communications device sends the first reference signal to the first user equipment, the method further includes:
- the second UE sends a first correction request to the base station, so that the base station sends scheduling information to the second UE and the first UE according to the first correction request; where the scheduling information includes the first UE identifier. And a second UE identifier and a time-frequency resource.
- the method before the communications device is the base station, before the communications device sends the first reference signal to the first user equipment UE, the method further includes:
- the base station receives the second correction request sent by the first UE, and sends scheduling information to the first UE according to the second correction request.
- the scheduling information includes a first UE identifier and a time-frequency resource.
- the channel information and the second channel information, and the reciprocity correction includes:
- a method for reciprocity correction between UEs including:
- the first user equipment UE receives the first reference signal sent by the communication device, and according to The first reference signal estimates first channel information of a first channel between the first UE and the communication device;
- Transmitting a second reference signal to the communication device so that the communication device estimates second channel information of the second channel between the communication device and the first UE according to the second reference signal, and according to the first
- the channel information and the second channel information are subjected to reciprocity correction.
- the method before the first user equipment UE receives the first reference signal sent by the communications device, the method further includes:
- the scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency resource.
- the method before the first user equipment UE receives the first reference signal sent by the communications device, when the communications device is a base station, the method further includes:
- a communication device including:
- a first sending unit configured to send a first reference signal to the first user equipment UE, so that the first UE estimates, according to the first reference signal, a first channel of the first channel between the first UE and the communications device Channel information
- a first receiving unit configured to receive the first channel information that is fed back by the first UE
- the communications device when the communications device is a second UE, the communications device further includes:
- a second sending unit configured to send a first correction request to the base station, so that the base station sends scheduling information to the second UE and the first UE according to the first correction request; where the scheduling information includes the first UE identity, second UE identity, and time-frequency resource.
- the communications device when the communications device is a base station, the communications device further includes:
- a third receiving unit configured to receive a second correction request that is sent by the first UE, where the second sending unit is configured to send, according to the second correction request received by the third receiving unit, scheduling information to the a first UE; wherein the scheduling information includes a first UE identifier and a time-frequency resource.
- a first user equipment UE including:
- a first receiving unit configured to receive a first reference signal sent by the communications device, and estimate first channel information of the first channel between the first UE and the communications device according to the first reference signal;
- a first sending unit configured to send the first channel information to the communications device
- a second sending unit configured to send a second reference signal to the communications device, so that the communications device is configured according to the second reference signal
- estimating second channel information of the second channel between the communication device and the first UE and performing reciprocity correction according to the first channel information and the second channel information.
- the first UE when the communications device is the second UE, the first UE further includes:
- a second receiving unit configured to receive scheduling information that is sent by the base station according to the first calibration request, where the scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency Resources.
- the first UE when the communications device is a base station, the first UE further includes:
- a third sending unit configured to send a second calibration request to the base station
- a second receiving unit configured to receive scheduling information that is sent by the base station according to the second calibration request, where the scheduling information includes a first UE identifier and a time-frequency resource.
- a communication device including:
- a communication unit configured to communicate with an external device
- a transmitter configured to send, by using the communications unit, a first reference signal to the first user equipment UE, so that the first UE estimates a first channel between the first UE and the communications device according to the first reference signal First channel information;
- a receiver configured to receive, by using the communications unit, the first channel information that is sent by the first UE;
- the receiver is further configured to receive, by using the communications unit, a second reference signal sent by the first UE;
- a processor configured to estimate second channel information of the second channel between the communication device and the first UE according to the second reference signal
- the processor is further configured to perform reciprocity correction according to the first channel information and the second channel information.
- the transmitter is further configured to send, by using the communications unit, a first calibration request to the base station, so that the base station And sending scheduling information to the second UE and the first UE according to the first correction request; where the scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency resource.
- the receiver when the communications device is a base station, the receiver is further configured to receive, by using the communications unit, a second calibration request sent by the first UE, and And transmitting scheduling information to the first UE according to the second correction request; where the scheduling information includes a first UE identifier and a time-frequency resource.
- a first user equipment UE including:
- a communication unit configured to communicate with an external device
- a receiver configured to receive, by the communications unit, a first reference signal sent by the communications device, and estimate first channel information of the first channel between the first UE and the communications device according to the first reference signal;
- a transmitter configured to send the first channel information to the communications device by using the communications unit
- the transmitter is further configured to send, by the communication unit, a second reference signal to the communications device, so that the communications device estimates a second between the communications device and the first UE according to the second reference signal. And second channel information of the channel, and performing reciprocity correction according to the first channel information and the second channel information.
- the receiver is further configured to receive, by using the communications unit, scheduling information that is sent by the base station according to the first calibration request.
- the scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency resource.
- the transmitter when the communication device is a base station, the transmitter is further configured to send, by using the communication unit, a second correction request to the base station; The scheduling information sent according to the second correction request; wherein the scheduling information includes a first UE identifier and a time-frequency resource.
- a communication system including: a communication device and a first user equipment UE, where the communication device is a communication device corresponding to any possible implementation manner provided by the third aspect, where the first UE is The first UE corresponding to any one of the possible implementation manners provided by the foregoing fourth aspect; or the communication device is the communication device corresponding to any possible implementation manner provided by the fifth aspect, where the first UE is the foregoing sixth Aspect A first UE corresponding to any of the possible implementations provided.
- the communication device receives the first channel between the first UE and the communication device estimated by the first UE according to the first reference signal sent by the communication device First channel information, and second channel information of the second channel between the first UE and the communication device estimated according to the second reference signal reported by the first UE, thereby, according to the foregoing first channel information and the second channel information
- the reciprocity error correction between UEs is performed, thereby ensuring the performance of the communication system.
- FIG. 1 is a schematic flowchart of a method for reciprocity correction between UEs according to an embodiment of the present invention
- FIG. 2 is a schematic flowchart of another method for reciprocity correction between UEs according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of still another method for reciprocity correction between UEs according to an embodiment of the present invention
- FIG. 4 is a schematic flowchart of still another method for reciprocity correction between UEs according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of an apparatus for a communication device according to an embodiment of the present invention
- FIG. 6 is a schematic diagram of another apparatus for providing a communication device according to an embodiment of the present invention
- FIG. 8 is a schematic diagram of a device of a first user equipment UE according to an embodiment of the present invention
- FIG. 9 is a schematic diagram of another apparatus for a first UE according to an embodiment of the present invention.
- FIG. 10 is a schematic diagram of another apparatus for a first UE according to an embodiment of the present invention.
- FIG. 11 is a schematic diagram of an apparatus for a communication device according to another embodiment of the present invention.
- FIG. 12 is a schematic diagram of a device of a first UE according to another embodiment of the present invention.
- FIG. 13 is a system architecture diagram of a communication system according to an embodiment of the present invention
- FIG. 14 is a system architecture diagram of another communication system according to an embodiment of the present invention. detailed description
- the embodiments provided by the present invention are applied to an LTE (Long Term Evolution) TDD (Time Division Duplexing) system.
- the uplink and downlink channels of the TDD system use the same frequency band and can be estimated according to the uplink channel. Channel, thereby improving downlink transmission performance.
- the actual channel reciprocity does not exist in the actual TDD system, and the slight uplink and downlink channel reciprocity error can cause significant changes in system performance, the actual downlink channel cannot be reflected according to the uplink channel. Therefore, the reciprocity correction of the antenna must be performed before using the TDD channel reciprocity feature.
- the main application scenario of the present invention is a cellular wireless communication system
- the reciprocity error in the communication system is mainly composed of a base station side reciprocity error and a UE side reciprocity error.
- the prior art usually solves the reciprocity error of the base station by self-correction of the base station antenna, that is, selecting a correction antenna from the antennas on the base station side, thereby performing other antennas of the base station through the correction antenna. Correction.
- the application scenario is limited, but it does not attract enough attention, and there is no corresponding solution. Therefore, based on the foregoing application scenario, an embodiment of the present invention provides a reciprocity between UEs for solving a reciprocity error problem between UEs. Correction method.
- an embodiment of the present invention provides a method for reciprocity correction between UEs, which may be implemented by a communication device, where the method for reciprocity correction between UEs includes the following steps:
- the communications device sends a first reference signal to the first user equipment UE, so that the first UE estimates the first channel information of the first channel between the first UE and the communications device according to the first reference signal.
- the foregoing communication device may be a base station or a UE.
- the first reference signal may be a signal known by the first UE, such as pilot information.
- the communication device can perform the reciprocity correction between the single UE and the communication device not only with one first UE, but also can interact with multiple first UEs at the same time to implement multiple UEs. Mutual complementarity correction.
- the communications device receives the first channel information that is fed back by the first UE.
- the communications device receives the second reference signal sent by the first UE.
- the second reference signal may be a signal known by the communication device, such as pilot information.
- the communications device estimates second channel information of the second channel between the first UE and the communications device according to the second reference signal.
- the first channel between the UE and the communication device described in the embodiment of the present invention is a downlink between the first UE and the base station
- the second channel is the first UE and the base station.
- the communication device is the second UE
- the first channel and the second channel between the first UE and the communication device described in the embodiment of the present invention are between the first UE and the second UE.
- Transceiver channel is a base station
- the communication device performs reciprocity correction according to the first channel information and the second channel information.
- step 105 may specifically include the following content:
- the communication device adjusts the first channel matrix corresponding to the first channel information and the second channel matrix corresponding to the second channel information, so that the first channel matrix is equal to the second channel matrix.
- the communication device calculates a reciprocity adjustment coefficient according to the obtained first channel information and the second channel information between the first UE and the communication device, and sends the reciprocity adjustment coefficient to the first UE. And causing the first UE to adjust the first channel matrix corresponding to the first channel information and the second channel matrix corresponding to the second channel information according to the reciprocity adjustment coefficient, so that the first channel matrix is equal to the second channel matrix .
- the above reciprocity adjustment coefficient is as shown in formula 1:
- the present invention provides a method for reciprocity correction between two UEs.
- the first implementation manner is: when the communication device is the second UE, the base station configures scheduling information for the first UE and the second UE, so that the first The UE and the second UE directly perform the reciprocity correction between the UEs according to the scheduling information.
- the second implementation manner is: when the communication device is a base station, the base station implements reciprocity between the UEs for at least two first UEs respectively. Correction.
- the method further includes:
- the second UE sends a first correction request to the base station, so that the base station sends scheduling information to the second UE and the first UE according to the first correction request.
- the foregoing scheduling information includes, but is not limited to, a first UE identifier, a second UE identifier, and a time-frequency resource.
- the method further includes:
- the base station receives the second correction request sent by the first UE, and sends the scheduling information to the first UE according to the second correction request.
- the foregoing scheduling information includes but is not limited to: a first UE identifier and a time-frequency resource.
- each UE in the communication system described in the present invention is given a unique UE identifier to distinguish different UEs in the communication system (eg, for distinguishing the first UE from the second UE).
- the time-frequency resource is the specific time-frequency domain location of the first reference signal when the first reference signal is sent by the communications device to the first UE, and the second reference signal is sent by the first UE to the communications device.
- the specific time-frequency domain position of the signal so that the first UE can accurately and efficiently acquire the first reference signal sent by the communication device, so that the communication device can accurately and efficiently acquire the second reference signal sent by the first UE.
- the method for reciprocity correction between UEs is provided by the embodiment of the present invention, the communication device receives the first channel information of the first channel between the first UE and the communication device that is estimated by the first UE according to the first reference signal sent by the communication device, And the second channel information of the second channel between the first UE and the communication device estimated according to the second reference signal reported by the first UE, so as to perform mutual interaction between the UE according to the first channel information and the second channel information.
- the error correction is performed to ensure the performance of the communication system.
- a method for reciprocity correction between UEs according to the embodiment of the present invention, as shown in FIG. 2, may be implemented by a first UE, where the method for reciprocity correction between UEs includes the following steps:
- the first UE receives the first reference signal sent by the communications device, and estimates first channel information of the first channel between the first UE and the communications device according to the first reference signal.
- the foregoing communication device may be a base station or a UE.
- the first reference signal is a signal known by the first UE.
- the communication device can perform the reciprocity correction between the single UE and the communication device not only with one first UE, but also can interact with multiple first UEs simultaneously to implement multiple UEs. Mutual complementarity correction.
- the first UE sends the first channel information to the communications device.
- the first UE sends a second reference signal to the communications device, so that the communications device And estimating second channel information of the second channel between the communication device and the first UE according to the second reference signal, and performing reciprocity correction according to the first channel information and the second channel information.
- the first UE after receiving the reciprocity adjustment coefficient calculated by the communications device according to the obtained first channel information and the second channel information between the first UE and the communications device, the first UE adjusts according to the reciprocity The coefficient adjusts the first channel matrix corresponding to the first channel information and the second channel matrix corresponding to the second channel information, such that the first channel matrix is equal to the second channel matrix.
- the above reciprocity adjustment coefficient is as shown in Formula 2: l' «2 Equation 2 where is a constant that is not zero.
- the RF receiving channel coefficients of the UE , UE "..., the first channel described above are respectively, n ..., the RF transmission channel coefficients (the second channel described above) are respectively ", ..., after the above
- the correction process the result of the correction is such that the first channel matrix of the first channel information of each first UE and the communication device is equal to the second channel matrix of the corresponding second channel information.
- the present invention provides a method for reciprocity correction between two UEs.
- the first implementation manner is: when the communication device is the second UE, the base station configures scheduling information for the first UE and the second UE, so that the first The UE and the second UE directly perform the reciprocity correction between the UEs according to the scheduling information.
- the second implementation manner is: when the communication device is a base station, the base station respectively implements reciprocity correction between the UEs by using at least two first UEs. .
- the method further includes:
- the first UE receives scheduling information that is sent by the base station according to the first calibration request sent by the second UE.
- the foregoing scheduling information includes, but is not limited to, a first UE identifier, a second UE identifier, and a time-frequency resource.
- the method further includes:
- the first UE sends a second calibration request to the base station, so that the base station according to the second
- the correction request sends the scheduling information to the first UE.
- the foregoing scheduling information includes, but is not limited to, a first UE identifier and a time-frequency resource.
- each UE in the communication system described in the present invention is assigned a unique UE identity to distinguish different UEs in the communication system (e.g., to distinguish between the first UE and the second UE).
- the time-frequency resource is the specific time-frequency domain location of the first reference signal when the first reference signal is sent by the communications device to the first UE, and the second time is when the first UE sends the second reference signal to the communications device.
- the specific time-frequency domain position of the reference signal is obtained, so that the first UE can accurately and efficiently acquire the first reference signal sent by the communication device, so that the communication device can accurately and efficiently acquire the second reference signal sent by the first UE.
- the method for the inter-UE reciprocity correction is provided by the first embodiment of the present invention, the first UE estimates the first channel information of the first channel between the first UE and the communication device according to the first reference signal sent by the communication device, and the first channel The channel information is fed back to the base station, so that the base station performs the inter-UE between the UE based on the first channel information and the second channel information of the second channel between the first UE and the communication device, which is estimated according to the second reference signal reported by the first UE.
- the reciprocity error correction ensures the performance of the communication system.
- the reciprocity correction method between UEs provided by the embodiment of the present invention is introduced in a specific application scenario.
- the description of the technical terms, concepts, and the like related to the above embodiments in the following embodiments can be referred to the above embodiments.
- the following embodiments are mainly directed to different communication devices corresponding to different inter-UE reciprocity correction processes.
- the communication device when the communication device is the second UE, if the corresponding reciprocity correction method is that the base station participates in resource scheduling, the first UE and the second UE directly perform reciprocity between the UEs.
- the method of calibration when the communication device is a base station, the corresponding reciprocity correction method is a method in which the base station controls at least two first UEs respectively to implement reciprocity correction between UEs.
- the method for correcting the reciprocity between the corresponding UEs may be referred to FIG. 3, as shown in FIG. 3 .
- the second UE sends a first calibration request to the base station.
- the base station sends scheduling information to the communications device and the UE according to the first calibration request. For example, after the second UE sends the first calibration request to the base station, the base station sends scheduling information for the second UE and the at least one first UE according to the first correction request, so that the second UE and each first UE according to the The scheduling information acquires the first reference signal or the second reference signal quickly and accurately.
- the foregoing scheduling information specifically includes but is not limited to: a first UE identifier, a second UE identifier, and a time-frequency resource.
- each UE in the communication system described in the present invention is given a unique UE identifier to distinguish different UEs in the communication system (eg, for distinguishing the first UE from the second UE).
- the time-frequency resource is the specific time-frequency domain location of the first reference signal when the second UE sends the first reference signal to the first UE, and the first UE sends the second reference signal to the second UE. a specific time-frequency domain location of the second reference signal, so that the first UE can accurately and efficiently acquire the first reference signal sent by the second UE, so that the second UE can accurately and efficiently obtain the second reference sent by the first UE. signal.
- the second UE sends a first reference signal to the first UE.
- the first reference signal is a signal known by the first UE.
- the step 303 includes: the second UE may send the first reference signal to the U first E by using the transmit power.
- the first UE calculates first channel information of the first channel between the first UE and the second UE according to the first reference signal.
- the second UE receives the first channel information that is sent by the first UE.
- the second UE receives the second reference signal reported by the first UE.
- the second reference signal is a signal known by the second UE.
- the step 306 includes: receiving, by the second UE, the second reference signal that is reported by the first UE by using the transmit power.
- the second UE estimates second channel information of the second channel between the first UE and the second UE according to the second reference signal.
- the first channel and the second channel between the first UE and the second UE are the transmission channel and the receiving channel between the first UE and the second UE, but for the first UE, The first channel and the first between the first UE and the second UE.
- the second channel is a receiving channel and a transmitting channel between the first UE and the second UE.
- the second UE performs reciprocity correction according to the first channel information and the second channel information.
- the step 308 specifically includes the following: the second UE adjusts the first channel matrix corresponding to the first channel information and the second channel matrix corresponding to the second channel information, so that the first channel matrix is equal to the second channel matrix.
- the second UE calculates a reciprocity adjustment coefficient according to the obtained first channel information and second channel information between the first UE and the second UE, and sends the reciprocity adjustment coefficient to the first The UE, the first UE adjusts the first channel matrix corresponding to the first channel information and the second channel matrix corresponding to the second channel information according to the reciprocity adjustment coefficient, so that the first channel matrix and the second channel are The matrices are equal.
- the second UE takes UE 1 as an example
- the first UE takes UE2 as an example
- the base station in this embodiment specifically allocates configuration information for calibration to UE1 and UE2 through downlink scheduling, and the scheduling information may be sent to all UEs participating in the correction through a control channel or other channels, or may be sent to some UEs, and then This part of the UE is forwarded to other users.
- the communication system includes only one first UE, that is, the communication system includes the UE1 and the UE2
- the reciprocity correction procedure between the UEs provided in this embodiment is: First, UE2 and UE1 respectively estimate the first channel to obtain the first channel information.
- the HI and the second channel information H2 of the second channel are as follows:
- H 2 Equation 4 where the above is the receiving channel parameter of UE1, "is the channel parameter, which is the spatial channel between UE1 and UE2. It is the receiving channel parameter of UE2, UE2 ⁇ [ «2 channel parameter.
- the communication device includes multiple UEs, that is, the number of UEs If the value is greater than 2, a second UE, that is, UE1, should be selected from all UEs on the user side, and all other UEs (ie, UE2, UE3, ...
- UEn n is a natural number greater than or equal to 2)
- the first reference signal is sent to UE1.
- UE1 simultaneously broadcasts the second reference signal to all other UEs, most The final realization: .
- the result of the correction is that the quotient of the transceiver channel coefficients of each UE is equal, that is, the transceiver channel matrices of all UEs are equal, thereby realizing multiple UEs. Reciprocity correction.
- the reciprocity parameters are calculated by transmitting reference signals between UEs, and the correction is completed. Since the distance between users is generally close, the estimation accuracy of the reference signal is high, and thus the correction accuracy is also high.
- the reciprocity correction between UEs needs to be implemented in the cellular frequency band, and the mutual reciprocity between UEs is not interfered with the normal communication between other UEs and the base station. Sex correction needs to be performed under the control of the base station.
- the inter-UE reference signals must be transmitted as close as possible to ensure that the spatial signals are unchanged.
- the method for reciprocity correction between UEs is provided by the embodiment of the present invention, the second UE receives the first channel of the first channel between the first UE and the second UE that is estimated by the first UE according to the first reference signal sent by the second UE. Channel information, and second channel information of the second channel between the first UE and the second UE estimated according to the second reference signal reported by the first UE, thereby performing according to the foregoing first channel information and the second channel information.
- the reciprocity error correction between UEs ensures the performance of the communication system.
- the method for correcting the reciprocity between the corresponding UEs when the communication device is a base station may refer to FIG. 4, as shown in FIG. 4.
- the first UE sends a second calibration request to the base station.
- the base station sends the scheduling information to the first UE according to the second correction request.
- the communication system may include one first UE, and may also include multiple first UEs, and in an actual application, the communication system usually includes multiple first UEs to simultaneously perform multiple UEs. Reciprocity correction. Specifically, after each first UE of the at least one first UE sends a second correction request to the base station, the base station sends scheduling information for each first UE according to the second correction request, so that each first UE is configured according to the scheduling. The information acquires the first reference signal quickly and accurately.
- the foregoing scheduling information specifically includes, but is not limited to: a first UE identifier and a time-frequency resource of each first UE.
- each UE in the communication system described in the present invention is assigned a unique UE identifier to distinguish a plurality of different first UEs in the communication system.
- the time-frequency resource is the specific time-frequency domain location of the first reference signal when the first reference signal is sent by the communications device to the first UE, so that the first UE can accurately and efficiently obtain the first reference sent by the base station.
- the signal enables the communication device to accurately and efficiently acquire the second reference signal sent by the first UE.
- the base station sends a first reference signal to the first UE.
- the first reference signal is a signal known by the first UE.
- the first UE estimates first channel information of the first channel between the first UE and the base station according to the first reference signal.
- the base station receives first channel information that is fed back by the first UE.
- the base station receives the second reference signal reported by the first UE.
- the second reference signal is a signal known by the base station.
- the step 406 specifically includes: receiving, by the base station, the second reference signal that is reported by the first UE by using the transmit power.
- the base station estimates second channel information of the second channel between the first UE and the base station according to the second reference signal.
- the first channel between the first UE and the base station is a downlink between the first UE and the base station
- the second channel between the first UE and the base station is an uplink between the first UE and the base station. road.
- the base station performs reciprocity correction according to the first channel information and the second channel information.
- the step 408 specifically includes the following: the base station adjusts the first channel matrix corresponding to the first channel matrix and the second channel matrix corresponding to the second channel information, so that the first channel matrix is equal to the second channel matrix.
- the base station calculates a reciprocity adjustment coefficient according to the obtained first channel information and the second channel information between the first UE and the base station, and sends the reciprocity adjustment coefficient to the first UE, so that a UE adjusts the first according to the reciprocity adjustment coefficient
- the first channel matrix corresponding to the channel information and the second channel matrix corresponding to the second channel information are such that the first channel matrix is equal to the second channel matrix.
- the UE is configured by two first UEs (here, only for example, and the specific application is not limited to two first UEs), that is, UE1 and UE2.
- the UE is an example.
- the base station in this embodiment allocates configuration information for calibration to the UE1 and the UE2 through the downlink scheduling, and the scheduling information may be sent to all the first UEs participating in the correction through the control channel or other channels, or may be sent to the part.
- a UE, and then the portion of the first UE is forwarded to other users.
- the reciprocity correction procedure between the UEs provided in this embodiment is: First, UE1 and UE2 respectively send a second reference channel to the base station, and the base station separately estimates the first channel (and the uplink) of UE1 and UE2 according to the second reference channel.
- the first channel information of the link is as follows:
- ⁇ hr Equation 6 where the above is the channel coefficient for UE1, the above is the transmission channel coefficient of 1 ⁇ 2, the above is the spatial channel from UE1 to the base station, and the above is the spatial channel from 1 ⁇ 2 to the base station, ⁇ " is the base station Receiving channel coefficients of the receiver. While the UE1 and the UE2 respectively send the second reference signal to the base station, the base station sends the first reference signal to the UE1 and the UE2, and the UE1 and the UE2 respectively estimate the second channel according to the first reference signal sent by the base station.
- the second channel information (downlink) is as follows:
- ⁇ ⁇ - ⁇ ' Equation 8
- the above is the UE1 receiving channel coefficient
- the above is the UE2 receiving channel coefficient, which is the transmission channel coefficient of the base station receiver.
- the constant is not zero, and after the above correction process, the result of the correction is that the channel matrices of the transceiver channels of each first UE are made equal, so that the first channel matrix and the first channel matrix between each first UE and the base station The two channel matrices are equal, thereby achieving reciprocity correction between multiple UEs.
- the base station separately controls at least two first UEs to fully utilize the resources pre-configured by the base station to calculate inter-UE reciprocity parameters without additional resource scheduling.
- the base station can be regarded as the second UE described in the corresponding embodiment of FIG. 3, and the UE directly interacting with the first UE to participate in resource scheduling is reciprocal. Sex correction.
- the reciprocity correction between UEs needs to be implemented in a cellular frequency band, and in order not to interfere with normal communication between other UEs and base stations, reciprocity correction between UEs is required.
- the reference signals between the UEs must be transmitted as much as possible to ensure that the spatial signals are unchanged.
- the base station receives the first channel information of the first channel between the first UE and the base station that is estimated by the first UE according to the first reference signal sent by the base station, and according to the first The second channel information of the second channel between the first UE and the base station estimated by the second reference signal reported by the UE, so as to perform the reciprocity error correction between the UE according to the first channel information and the second channel information , thereby ensuring the performance of the communication system.
- the embodiment of the present invention further provides a corresponding device to implement a reciprocity correction method between UEs provided by an embodiment of the present invention.
- the embodiment of the present invention provides a communication device, which can be used to implement the communication device in the embodiment shown in FIG. 1 to FIG. 4, and the function, working mechanism, and related technical terms of the communication device provided by the embodiment of the present invention.
- the communication device 5 includes: a first transmitting unit 51, a first receiving unit 52, a second receiving unit 53, an estimating unit 54, and a correction list. Yuan 55, where:
- the first sending unit 5 1 is configured to send the first reference signal to the first user equipment UE, so that the first UE estimates the first channel information of the first channel between the first UE and the communications device according to the first reference signal.
- the first receiving unit 52 is configured to receive first channel information that is fed back by the first UE.
- the second receiving unit 53 is configured to receive a second reference signal sent by the first UE.
- the estimating unit 54 is configured to estimate second channel information of the second channel between the communications device and the first UE according to the second reference signal received by the second receiving unit 53.
- the correcting unit 55 is configured to perform reciprocity correction according to the first channel information received by the first receiving unit 52 and the second channel information estimated by the estimating unit 54.
- the communication device receives the first channel information of the first channel between the first UE and the communication device estimated by the first UE according to the first reference signal sent by the communication device, and according to the first UE Transmitting, by the second reference signal, the second channel information of the second channel between the first UE and the communication device, so as to perform the reciprocity error correction between the UE according to the first channel information and the second channel information. In turn, the performance of the communication system is guaranteed.
- the communications device 5 when the foregoing communications device is the second UE, the communications device 5 further includes: a second sending unit 56a, where:
- the second sending unit 56a is configured to send a first correction request to the base station, so that the base station sends the scheduling information to the second UE and the first UE according to the first correction request.
- the foregoing scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency resource.
- the communications device 5 when the foregoing communications device is a base station, the communications device 5 further includes: a third receiving unit 57b and a second sending unit 56b, where:
- the third receiving unit 57b is configured to receive a second calibration request sent by the first UE.
- the second sending unit 56b is configured to send scheduling information to the first UE according to the second correction request received by the third receiving unit 57b.
- the foregoing scheduling information includes a first UE identifier and a time-frequency resource.
- the foregoing correcting unit 55 is specifically configured to: adjust an anisotropy coefficient, so that The first channel matrix corresponding to the first channel information is equal to the second channel matrix corresponding to the second channel information.
- the communication device receives the first channel information of the first channel between the first UE and the communication device estimated by the first UE according to the first reference signal sent by the communication device, and reports according to the first UE
- the second reference signal estimates the second channel information of the second channel between the first UE and the communication device, so as to perform the reciprocity error correction between the UEs according to the first channel information and the second channel information, and further The performance of the communication system is guaranteed.
- the single cloud division of the communication device in the embodiment of the present invention is an exemplary description. In practice, there may be a plurality of unit division methods to constitute the communication device of the embodiment of the present invention.
- the embodiment of the present invention provides a first user equipment UE, which may be used to implement the first UE in the embodiment shown in FIG. 1 to FIG. 4, and the function and working mechanism of the communication device provided by the embodiment of the present invention.
- the first UE6 includes: a first receiving unit 61, a first sending unit 62, and a second sending unit 63, where:
- the first receiving unit 61 is configured to receive a first reference signal sent by the communications device, and estimate first channel information of the first channel between the first UE and the communications device according to the first reference signal.
- the first sending unit 62 is configured to send the first channel information to the communications device.
- a second sending unit 63 configured to send the second reference signal to the communications device, so that the communications device estimates the second channel information of the second channel between the communications device and the first UE according to the second reference signal, and according to the first channel information Two-channel information, for reciprocity correction.
- the first UE provided by the embodiment of the present invention, the first UE estimates first channel information of the first channel between the first UE and the communication device according to the first reference signal sent by the communication device, and feeds back the first channel information to
- the base station is configured to perform a reciprocity error between the UE according to the first channel information and the second channel information of the second channel between the first UE and the communication device that is estimated according to the second reference signal reported by the first UE. Correction, in turn, guarantees the performance of the communication system.
- the first UE6 further includes: a second receiving unit 64a, where:
- the second receiving unit 64a is configured to receive scheduling information that is sent by the base station according to the first correction request.
- the foregoing scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency resource.
- the first UE6 when the communication device is a base station, the first UE6 further includes: a third sending unit 65b and a second receiving unit 64b, where:
- the third sending unit 65b is configured to send a second calibration request to the base station.
- the second receiving unit 64b is configured to receive scheduling information that is sent by the base station according to the second correction request.
- the foregoing scheduling information includes a first UE identifier and a time-frequency resource.
- the first UE provided by the embodiment of the present invention, the first UE estimates first channel information of the first channel between the first UE and the communication device according to the first reference signal sent by the communication device, and feeds back the first channel information to
- the base station is configured to perform a reciprocity error between the UE according to the first channel information and the second channel information of the second channel between the first UE and the communication device that is estimated according to the second reference signal reported by the first UE. Correction, in turn, guarantees the performance of the communication system.
- the single cloud division of the first UE in the embodiment of the present invention is an exemplary description. In practice, a plurality of unit division methods may be used to form the first U E of the embodiment of the present invention.
- the communication device provided by the embodiment of the present invention may be a base station or a user equipment UE.
- the specific working principle of the interaction with other network elements, related technical terms, concepts, and the like may be referred to the communication device shown in the corresponding embodiment of FIG. 1 to FIG. 4, and details are not described herein.
- the communication device 7 includes a communication unit 71, a processor 72, a receiver 73, and a transmitter 74, where:
- the communication unit 71 is configured to communicate with an external device.
- the transmitter 74 is configured to send, by using the communication unit 71, the first reference signal to the first user equipment UE, so that the first UE estimates the first UE and the communication device according to the first reference signal.
- the first channel information of the first channel is prepared.
- the receiver 73 is configured to receive, by using the communication unit 71, first channel information that is fed back by the first UE.
- the receiver 73 is further configured to receive, by the communication unit 71, the second reference signal sent by the first UE.
- the processor 72 is configured to estimate second channel information of the second channel between the communications device and the first UE according to the second reference signal.
- the processor 72 is configured to perform reciprocity correction according to the first channel information and the second channel information.
- the transmitter 74 is further configured to send, by using the communication unit 71, a first correction request to the base station, so that the base station sends scheduling information for the second UE and the first UE according to the first correction request.
- the foregoing scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency resource.
- the receiver 73 is further configured to receive, by the communication unit 71, a second correction request sent by the first UE, and send the scheduling information to the first UE according to the second correction request.
- the foregoing scheduling information includes a first UE identifier and a time-frequency resource.
- the processor 72 performs the reciprocity correction according to the first channel information and the second channel information, where the reciprocity correction is performed to: adjust the dissimilarity coefficient, so that the first channel matrix corresponding to the first channel information corresponds to the second channel information.
- the second channel matrix is equal.
- the communication device receives the first channel information of the first channel between the first UE and the communication device estimated by the first UE according to the first reference signal sent by the communication device, and according to the first UE Transmitting, by the second reference signal, the second channel information of the second channel between the first UE and the communication device, so as to perform the reciprocity error correction between the UE according to the first channel information and the second channel information. In turn, the performance of the communication system is guaranteed.
- the single cloud division of the communication device in the embodiment of the present invention is an exemplary description. In practice, there may be a plurality of unit division methods to constitute the communication device of the embodiment of the present invention.
- the first user equipment UE provided by the embodiment of the present invention. Its specific working principle and Other device interactions, related technical terms, concepts, etc. can refer to Figure 1 to Figure
- the first UE 8 includes a communication unit 81, a receiver 82, and a transmitter 83, where:
- the communication unit 81 is configured to communicate with an external device.
- the receiver 82 is configured to receive, by the communication unit 81, a first reference signal sent by the communications device, and estimate first channel information of the first channel between the first UE and the communications device according to the first reference signal.
- the transmitter 83 is configured to send the first channel information to the communication device through the communication unit 81.
- the transmitter 83 is further configured to send the second reference signal to the communication device by using the communication unit 81, so that the communication device estimates the second channel information of the second channel between the communication device and the first UE according to the second reference signal, and according to the first channel
- the information and the second channel information are subjected to reciprocity correction.
- the receiver 82 is further configured to receive, by using the communication unit 81, scheduling information that is sent by the base station according to the first calibration request.
- the scheduling information includes a first UE identifier, a second UE identifier, and a time-frequency resource.
- the transmitter 83 is further configured to send, by using the communication unit 81, a second correction request to the base station; and receive, by the communication unit, scheduling information that is sent according to the second correction request, where the foregoing scheduling information includes A UE identity and time-frequency resources.
- the first UE provided by the embodiment of the present invention, the first UE estimates first channel information of the first channel between the first UE and the communication device according to the first reference signal sent by the communication device, and feeds back the first channel information to
- the base station is configured to perform a reciprocity error between the UE according to the first channel information and the second channel information of the second channel between the first UE and the communication device that is estimated according to the second reference signal reported by the first UE. Correction, in turn, guarantees the performance of the communication system.
- the single cloud division of the first UE in the embodiment of the present invention is an exemplary description. In practice, a plurality of unit division methods may be used to form the first U E of the embodiment of the present invention.
- Embodiments of the present invention provide a communication system, such as when a communication system is a base station, such as As shown in FIG. 13, the communication system 9 includes: a base station 91 and at least one first user equipment UE92, where:
- the base station 91 is configured to send a first reference signal to each first user equipment UE92.
- Any first UE 92 configured to estimate first channel information of the first channel between the any first UE92 and the base station 91 according to the first reference signal sent by the base station 91, and send the first channel information to the base station 91; It is used to send a second reference signal to the base station 91.
- the base station 91 is further configured to: estimate, according to the received second reference signal, second channel information of the second channel between the base station 91 and any of the first UEs 92, and perform reciprocity according to the first channel information and the second channel information. Correction.
- the base station receives the first channel information of each first UE and the first channel between the communication devices estimated by the first UE according to the first reference signal sent by the base station, and according to each The second channel information of the second channel between each first UE and the communication device estimated by the second reference signal reported by the first UE, so as to perform inter-UE interaction according to the first channel information and the second channel information.
- the error correction is performed to ensure the performance of the communication system.
- the embodiment of the present invention provides a communication system.
- the communication system is the second UE, as shown in FIG. 14, the communication system S10 includes: a second UES 101 and at least one first UE S102, where:
- the second UES101 is configured to send a first reference signal to each first user equipment UE S102.
- Any first UE S102 configured to estimate first channel information of the first channel between the first UE S 102 and the second UES 101 according to the first reference signal sent by the second UES 101, and send the first channel information
- the second UES 101 is further configured to send a second reference signal to the second UES 101.
- the second UES 101 is further configured to: estimate second channel information of the second channel between the second UES 101 and any of the first UEs S102 according to the received second reference signal, and perform, according to the first channel information and the second channel information, Reciprocity correction.
- the second UE receives, between each of the first UE and the second UE, estimated by each first UE according to the first reference signal sent by the base station.
- the second channel information is used to perform the reciprocity error correction between the UEs, thereby ensuring the performance of the communication system.
- the disclosed system, apparatus, and method may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of the modules or units is only a logical function division.
- there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed.
- the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
- the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
- the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
- the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code. .
Abstract
Description
Claims
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PCT/CN2014/073575 WO2015139192A1 (zh) | 2014-03-18 | 2014-03-18 | 一种ue间互易性校正的方法、装置及通信系统 |
JP2016558095A JP2017513365A (ja) | 2014-03-18 | 2014-03-18 | Ue間の相互依存性較正のための方法、装置、及び通信システム |
EP14886145.3A EP3110045A4 (en) | 2014-03-18 | 2014-03-18 | Method of correcting reciprocity between ues, and device and communication system |
US15/267,690 US20170033951A1 (en) | 2014-03-18 | 2016-09-16 | Method, Apparatus, and Communications System for Reciprocity Calibration Between UEs |
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EP3110045A4 (en) | 2017-03-08 |
CN106464458A (zh) | 2017-02-22 |
US20170033951A1 (en) | 2017-02-02 |
EP3110045A1 (en) | 2016-12-28 |
JP2017513365A (ja) | 2017-05-25 |
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