CN114697239B - Time delay evaluation method, device, equipment and medium - Google Patents
Time delay evaluation method, device, equipment and medium Download PDFInfo
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Abstract
The embodiment of the application discloses a time delay evaluation method, which comprises the following steps: a base station transmits a reference signal to a target terminal, wherein the base station comprises a plurality of antennas, and the reference signal is used for enabling the target terminal to measure the time delay of the antennas; the base station acquires feedback information from the target terminal, wherein the feedback information is time delay information obtained by measuring an antenna for transmitting a reference signal according to the reference signal by the target terminal; the base station determines delay values of the plurality of antennas according to the feedback information. The embodiment of the application also provides a device, equipment and medium. The base station sends a reference signal to the target terminal so that the terminal measures the base station antenna according to the reference signal, and the base station obtains the time delay condition of each antenna.
Description
Technical Field
The present disclosure relates to the field of electronics, and in particular, to a method, an apparatus, a device, and a medium for delay evaluation.
Background
Multi-user multiple-input multiple-output (MU MIMO) technology is an important means to increase cell capacity in cellular networks. The means for improving the capacity of MU MIMO is to schedule different users in the same time-frequency resource, so that the spectrum efficiency is improved and serious inter-user interference is brought. Time division duplex (time division duplexing, TDD) systems benefit from channel reciprocity, where channel information is known at the transmitter, and inter-user interference is eliminated as much as possible by orthogonalization of transmit weights, thereby enabling spatial multiplexing of multiple users.
Limited by protocol constraints and channel estimation capabilities, the downlink demodulation reference signals (deModulated reference signal, DMRS) typically employ a 4resource block bundling protocol (4resource block bundling,4RB Bundling), which requires that the 4RB granularity remain the same. In order to ensure matching of weights and channels, it is desirable that the channel with granularity of 4RB remains substantially unchanged, which requires delay consistency among downlink antennas. The larger the downlink delay difference, the stronger the inter-user (MU) interference, and when the delay is larger than a certain threshold, the MU performance is even lower than that of a single-user (SU). Therefore, in a MIMO system, a means is required to evaluate the time delays of the respective antennas, thereby solving the current downlink consistency level. For the MIMO system to decide whether to communicate currently in MU or SU mode.
Accordingly, the above-mentioned problems in the prior art have yet to be improved.
Disclosure of Invention
The embodiment of the application provides a time delay evaluation method, a time delay evaluation device, time delay evaluation equipment and a time delay evaluation medium, which are used for solving the problem of time delay measurement in a MIMO system.
In view of this, a first aspect of the present application provides a delay evaluation method, including: a base station transmits a reference signal to a target terminal, the base station comprising a plurality of antennas, the reference signal being used to cause the target terminal to measure the time delay of the antennas; the base station acquires feedback information from the target terminal, wherein the feedback information is time delay information obtained by measuring an antenna for transmitting a reference signal according to the reference signal by the target terminal; the base station determines delay values of the plurality of antennas according to the feedback information.
In this embodiment, the base station sends a reference signal to the target terminal, so that the terminal measures the base station antenna according to the reference signal, thereby enabling the base station to obtain the time delay condition of each antenna.
Optionally, the base station sends a reference signal to the target terminal, including: the base station transmits reference signals in a polling mode to a target terminal through at least two transmission periods, and the base station determines a target number of antennas for transmitting the reference signals in each transmission period, wherein the target number is equal to the number of antennas which can be measured by the target terminal;
in this embodiment, the base station overcomes the problem that the number of antennas measured by the terminal is not matched with the actual number of antennas of the base station by means of polling transmission. Thus, the terminal can measure the time delay condition of each antenna of the base station. The evaluation of the base station to the time delay condition in the MIMO system is realized. Meanwhile, in the polling transmission process, there may be a difference in the time delay condition of the pRRU between each transmission period, so that the measured time delay information between different transmission periods is not comparable, and thus, in order to clearly determine the relative relationship of the time delay information between different transmission periods. In the multiple transmission periods, the pRRU for transmitting the reference signal needs to have overlap, that is, some of the target antennas in the target number determined in each transmission period are the same as the antennas determined in the other transmission periods, so that the above problem is overcome.
Optionally, the base station acquires feedback information from the target terminal, including: the base station respectively acquires the time delay information of each antenna from the target terminal; the base station determining the time delays of the plurality of antennas according to the feedback information, including: the base station determines the delay value of each antenna according to the difference value of the delay information of each antenna and the delay information of the target antenna.
In this embodiment, by making a difference between the delay information of each antenna and the delay information of the target antenna, the delay relative relationship between each antenna and the target antenna can be obtained. So that the relative relation of the delay values between all antennas can be obtained.
Optionally, the base station polls the target terminal for sending the reference signal through at least two sending periods, including: the base station polls and transmits a channel state information reference signal (CSI-RS) to a target terminal through an antenna in a low-power radio frequency unit (pRRU); the base station obtaining feedback information from the target terminal, including: the base station acquires a time delay TA value from the target terminal; the base station determining delay values of the plurality of antennas according to the feedback information, including: the base station is based on the difference in TA values between the plurality of antennas and the target antenna.
In this embodiment, the terminal measures the TA value of the antenna when receiving the CSI-RS, and sends the measured TA value to the base station, thereby implementing measurement of the antenna delay information.
Optionally, the base station includes a plurality of radio frequency units, each radio frequency unit includes a plurality of antennas, and the base station determines a target number of antennas for transmitting the reference signal in each transmission period, including: the base station determines an antenna from a target number of radio frequency units as the target number of antennas, respectively.
In this embodiment, each radio frequency unit includes multiple antennas, for one radio frequency unit, the delay situations of each antenna are often similar, and the delay situations of antennas between different radio frequency units are often larger, so that each radio frequency unit only needs to take one antenna to measure, and the delay situations of each antenna can be known, thereby improving the measurement efficiency.
Optionally, before the base station polls the target terminal for sending the reference signal through at least two sending periods, the method further includes: the base station configures a target reference signal; the base station polls and transmits a reference signal to a target terminal through at least two transmission periods, and the method comprises the following steps: in each transmission period, each antenna of the target number of antennas transmits one of the target reference signals, respectively.
In this embodiment, each antenna performs transmission of a target reference signal, so that delay measurement of each antenna is achieved, and meanwhile, transmission efficiency is improved.
Optionally, before the base station polls the target terminal for sending the reference signal through at least two sending periods, the method further includes: the base station determines the target terminal according to the signal power.
In this embodiment, the base station communicates with multiple terminals at the same time, and the base station needs to determine a target terminal from the multiple terminals, so that the target terminal performs measurement of the delay. Thus, the base station can determine a target terminal from among the plurality of terminals by the signal power.
A second aspect of the present application provides a delay evaluation method, including: the terminal acquires a reference signal from a target antenna of the base station, wherein the reference signal is used for enabling the terminal to execute time delay measurement; the terminal measures the delay information of the target antenna according to the reference signal; the terminal sends the time delay information to the base station so that the base station determines the time delay condition of the target antenna according to the time delay information.
In this embodiment, after acquiring a reference signal sent by a base station through an antenna, a terminal measures a time delay condition of the antenna. And then feeding back the time delay condition to the base station, so that the base station knows the time delay condition of each antenna, and the evaluation of the base station on the time delay is realized.
Optionally, before the terminal acquires the reference signal from the target antenna of the base station, the method further includes: the terminal transmits sounding reference signals SRS to each antenna of the base station, respectively, the SRS being used for the base station to measure reference signal power between the terminal and each antenna of the base station.
In this embodiment, the terminal sends sounding reference signals SRS to each antenna of the base station, so that the base station determines that the terminal is a target terminal for performing delay measurement according to the transmission power of the reference signals.
Optionally, the terminal acquires a reference signal from a target antenna of the base station, including: the method comprises the steps that a terminal obtains a channel state information reference signal (CSI-RS) from a target antenna in a low-power radio frequency unit (pRRU) of a base station; the terminal measures delay information of the target antenna according to the reference signal, and the method comprises the following steps: the terminal obtains a time delay TA value of a target antenna according to the CSI-RS; the terminal sends the time delay information to the base station, which comprises the following steps: the terminal transmits the TA value to the base station.
In this embodiment, the terminal measures the TA value of the antenna when receiving the CSI-RS, and sends the measured TA value to the base station, thereby implementing measurement of the antenna delay information.
A third aspect of the present application provides a delay evaluating apparatus, including:
A transmitting unit configured to transmit a reference signal to a target terminal, the base station including a plurality of antennas, the reference signal being configured to cause the target terminal to measure a time delay of the antennas;
the acquisition unit is used for acquiring feedback information from the target terminal, wherein the feedback information is time delay information obtained by measuring an antenna for transmitting a reference signal according to the reference signal transmitted by the transmission unit by the target terminal;
and the execution unit is used for determining the time delay values of the plurality of antennas according to the feedback information acquired by the acquisition unit.
Optionally, the sending unit is further configured to:
the base station transmits reference signals to the target terminal in a polling way through at least two transmission periods, and in each transmission period, the base station determines a target number of antennas for transmitting the reference signals, wherein the target number is equal to the number of antennas which can be measured by the target terminal;
in one of the transmission periods, some of the target antennas in the target number of antennas are identical to antennas determined in other transmission periods.
Optionally, the acquiring unit is further configured to:
respectively acquiring time delay information of each antenna from the target terminal;
the execution unit is further configured to:
and determining the delay value of each antenna according to the difference value of the delay information of each antenna and the delay information of the target antenna.
Optionally, the sending unit is further configured to:
the method comprises the steps that a channel state information reference signal (CSI-RS) is sent to a target terminal in a polling mode through an antenna in a low-power radio frequency unit (pRRU);
the acquisition unit is further configured to:
acquiring a time delay TA value from the target terminal;
the execution unit is further configured to:
according to the difference of TA values between the plurality of antennas and the target antenna.
Optionally, the base station includes a plurality of radio frequency units, each radio frequency unit includes a plurality of antennas, and the execution unit is further configured to:
and respectively determining one antenna from the target number of radio frequency units as the target number of antennas.
Optionally, the execution unit is further configured to:
configuring a target reference signal;
the sending unit is further configured to:
in each transmission period, each antenna of the target number of antennas transmits one of the target reference signals, respectively.
Optionally, the execution unit is further configured to: the target terminal is determined based on the signal power.
A fourth aspect of the present application provides a delay evaluating apparatus, including:
an acquisition unit configured to acquire a reference signal from a target antenna of a base station, the reference signal being used to cause the terminal to perform delay measurement;
a measurement unit for measuring delay information of the target antenna according to the reference signal acquired by the acquisition unit;
And the sending unit is used for sending the time delay information measured by the measuring unit to the base station so that the base station can determine the time delay condition of the target antenna according to the time delay information.
Optionally, the sending unit is further configured to:
the terminal transmits sounding reference signals SRS to each antenna of the base station, respectively, the SRS being used to cause the base station to measure reference signal power between the terminal and each antenna of the base station.
Optionally, the acquiring unit is further configured to:
acquiring a channel state information reference signal (CSI-RS) from a target antenna in a low-power radio frequency unit (pRRU) of a base station;
the measuring unit is also used for:
the terminal obtains a time delay TA value of a target antenna according to the CSI-RS;
the sending unit is further configured to:
the terminal transmits the TA value to the base station.
A fifth aspect of the present application provides an electronic device, comprising: an interaction device, an input/output (I/O) interface, a processor, and a memory, the memory having program instructions stored therein;
the interaction device is used for acquiring an operation instruction input by a user;
the processor being configured to execute program instructions stored in a memory to perform the method according to any one of the first or second aspects.
A sixth aspect of the present application provides a computer readable storage medium comprising instructions which, when run on a computer device, cause the computer device to perform the method of any of the first or second aspects.
Drawings
Fig. 1 is a system architecture diagram of a delay evaluation method according to an embodiment of the present application;
fig. 2 is a schematic diagram of a delay evaluation method according to an embodiment of the present application;
fig. 3 is a schematic diagram of an electronic device according to an embodiment of the present application;
fig. 4 is a schematic diagram of a delay evaluating apparatus according to an embodiment of the present application;
fig. 5 is a schematic diagram of another delay evaluating apparatus according to an embodiment of the present application.
Detailed Description
The embodiment of the invention provides a time delay evaluation method, a time delay evaluation device, time delay evaluation equipment and a time delay evaluation medium, which are used for solving the problem of time delay measurement in a MIMO system.
In order to make the present embodiments better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the attached drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the protection herein.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Multi-user multiple-input multiple-output (MU MIMO) technology is an important means to increase cell capacity in cellular networks. The means for improving the capacity of MU MIMO is to schedule different users in the same time-frequency resource, so that the spectrum efficiency is improved and serious inter-user interference is brought. Time division duplex (time division duplexing, TDD) systems benefit from channel reciprocity, where channel information is known at the transmitter, and inter-user interference is eliminated as much as possible by orthogonalization of transmit weights, thereby enabling spatial multiplexing of multiple users.
Limited by protocol constraints and channel estimation capabilities, the downlink demodulation reference signals (deModulated reference signal, DMRS) typically employ a 4resource block bundling protocol (4resource block bundling,4RB Bundling), which requires that the 4RB granularity remain the same. In order to ensure matching of weights to channels, it is desirable that the 4RB granularity channels remain substantially unchanged, which places requirements on delay consistency among downstream antennas. The larger the downlink delay difference, the more users
The stronger the inter-user interference, the lower the MU performance is even below a single-user (SU) when the delay is greater than a certain threshold. Therefore, in a MIMO system, a means is required to evaluate the time delays of the respective antennas, thereby solving the current downlink consistency level. For the MIMO system to decide whether to communicate currently in MU or SU mode.
In a specific operation process, a base station of the MIMO system is used for transmitting signals, but the base station cannot measure a delay condition, the measurement can only be completed by a terminal (UE) side, and then a measurement result is fed back to the base station.
For example, in a Massive MIMO system, a base station actually has 64 antennas for transmitting signals, but the measurement capability of a terminal can only measure 4 antenna ports, and for this purpose, a mapping relationship between 64 antennas on the base station side and 4 antennas that can be measured on the terminal side needs to be established, so as to realize antenna-to-Port dimension reduction.
Therefore, the delay condition of 64 antennas at the base station side needs to be measured, but the terminal can only measure 4 antennas, so that the terminal cannot effectively evaluate the delay condition of all antennas at the base station side in the MIMO system.
Therefore, in order to solve the above-mentioned problems, the embodiments of the present application provide a delay evaluation method, which can solve the problem of delay measurement in a MIMO system. The following is a detailed description of the aspects of the present application for ease of understanding.
First, a system architecture according to an embodiment of the present application will be described.
Referring to fig. 1, fig. 1 is a schematic diagram of a MIMO system according to an embodiment of the present application. As shown in fig. 1, the MIMO system includes a base station 101 and a terminal 102, where the base station 101 includes a baseband unit BBU 1011 and a plurality of radio frequency units RRU 1012, and the plurality of radio frequency units 1012 are connected 1011 with the same baseband unit through a convergence switching node 1013, where each radio frequency unit 1012 includes at least one antenna, and each antenna communicates with the terminal 102 respectively, so as to implement transmission of multiple antennas in the MIMO system, and the terminal measures the multiple antennas, so as to implement reception of multiple antennas.
Based on the system architecture shown in fig. 1, the delay evaluation method provided in the embodiment of the present application is described in detail below.
Referring to fig. 2, as shown in fig. 2, the delay evaluation method provided in the embodiment of the present application includes.
201. And the base station determines the target terminal according to the signal power.
In this embodiment, the base station communicates with multiple terminals at the same time, and the base station needs to determine a target terminal from the multiple terminals, so that the target terminal performs measurement of the delay. Thus, the base station may determine a target terminal from the plurality of terminals by using the signal power, and the specific method may be:
the base station selects a proper terminal as a target terminal according to the received signal power (UE Sounding Reference Signal Reference Signal Received Power, UE SRS RSRP) of the sounding reference signal pilot signal of the terminal, and the SRS RSRP of the target terminal to each pRRU in the set of the radio frequency units pRRU to be measured is required to be basically the same, namely the formula is satisfied:
RSRPi-RSRPj<Thr
the RSRPi is the RSRP from the target terminal to any one of the radio frequency units to be measured, the RSRPj is the RSRP from the target terminal to any other radio frequency unit to be measured, and Thr is a preset value, and those skilled in the art can adjust the value of Thr according to actual needs, which is not limited in this embodiment of the present application.
In the above way, the base station can determine a terminal with the most average signal power as the target terminal, which is beneficial to the accuracy of the measurement result.
202. The base station transmits a reference signal to the target terminal.
In this embodiment, the base station transmits a reference signal to the target terminal, so that the target terminal measures the delay of the antenna according to the reference signal. Thus, the base station obtains the time delay condition of the antenna.
Optionally, the base station polls the target terminal for transmitting the reference signal through at least two transmission periods. As shown in fig. 1, the base station includes a plurality of antennas, and the base station determines a target number of antennas for transmitting a reference signal for causing the target terminal to measure a time delay of the antennas in each transmission period, the target number being equal to the number of antennas that the target terminal can measure.
For example, the number of pilot ports used for channel measurement at the base station side is 4, that is, the number of antennas that can be measured by the target terminal is 4, and the actual number of antennas at the base station side is 64, so that the target terminal can measure the time delay condition of 64 antennas of the base station through 4 ports. That is, each transmission period instructs the target terminal to measure the delays of 4 antennas at the base station side, and 16 rounds of polling enable the target terminal to measure the delays of all 64 antennas.
Alternatively, the base station may be implemented by configuring a set of aperiodic channel state information reference signals (CSI-RS) in the process of configuring the above reference signals, and in the above example, the base station needs to configure 64 CSI-RS ports as a target number (64) of target reference signals. During the polling transmission, each of the 4 target antennas determined in the transmission period is responsible for transmitting one target reference signal.
Further, as illustrated in fig. 1, each radio unit may be a low power radio unit (pico Remote Radio Unit, pRRU), each pRRU including a plurality of antennas. In the process of polling transmission, in each transmission period, the base station respectively determines one antenna from a target number of radio frequency units pRRU as the target number of antennas. That is, for the generated target reference signal Csi-RS Port, each Port is transmitted only at a certain antenna of a certain pRRU, and different ports are transmitted at different prrus. And ensuring that all pRRUs have corresponding CSR-RS Port transmission. The reason is that for one pRRU, the delay conditions of each antenna are often similar, and the delay conditions of the antennas between different prrus are often larger, so that each pRRU only needs to take one antenna to measure, and the delay conditions of each antenna can be known, thereby improving the measurement efficiency.
Optionally, the base station may also determine multiple antennas in the pRRU to send the reference signal, so as to implement measurement on the multiple antennas in the pRRU, which is not limited in this embodiment of the present application.
Further, in the polling transmission process, there may be a difference in the time delay of pRRU between each transmission period, so that the measured time delay information between different transmission periods is not comparable, and thus, in order to determine the relative relationship of the time delay information between different transmission periods. The pRRU that transmits the reference signal needs to overlap in multiple transmission periods. Namely:
some of the target number of antennas determined in each transmission period are identical to antennas determined in other transmission periods.
For example, if pRRU0, 1, 2, 3 is selected for the first transmission period, each of the four radio frequency units is used as the transmission antenna. Obtaining downlink delay measurement quantities TA0 (1), TA1 (1), TA2 (1) and TA3 (1) of the Port level by means of terminal feedback; the second transmission needs to select one pRRU from among 0, 1, 2, and 3 for retransmission in addition to pRRU 4, 5, and 6 that were not transmitted before transmission, and if 0 is selected, TA0 (2), TA4 (2), TA5 (2), and TA6 (2) are obtained. To obtain the comprehensive relative relationship of the two transmissions.
The reason for this is that although the actual channel delay difference does not change in the two measurements, the terminal timing is continuously adjusted, which results in the UE reporting amounts TA0 (1) and TA0 (2) being a variable in the two measurements.
203. And the target terminal measures the time delay information of the target antenna according to the reference signal.
In this embodiment, as described above, the reference signal acquired by the target terminal may be Csi-RS. The reference signal is used to trigger the target terminal to perform delay measurement on the target antenna. The specific measurement mode may be selected by those skilled in the art according to practical situations, and will not be described in detail in this embodiment of the present application.
Alternatively, the delay value of the target antenna measured by the target terminal may be a delay (TA) value.
204. And the target terminal sends the time delay information to the base station.
In this embodiment, the target terminal sends the measured delay information of each antenna to the base station.
After the measurement is completed, the target terminal feeds back the measured Port-level TA value. Feedback granularity feedback (8 ns) in sample time (Ts) is fed back in consideration of accuracy requirements. According to pRRU typical delay difference level (< 1 us), 8bit TA feedback quantity is designed, wherein one symbol bit represents the range-127-128 Ts. In this way, both the accuracy of the measurement and the actual measurement capabilities of the terminal are taken into account.
Alternatively, those skilled in the art may select TA values with other granularity according to actual needs, which is not limited in this embodiment of the present application.
205. And the base station determines the delay values of the plurality of antennas according to the feedback information.
In this embodiment, the base station may know the delay condition of each antenna according to the TA value fed back by the target terminal.
Further, as described above, the base station transmits the reference signal by means of bridging when transmitting the reference signal by polling, that is, some of the target antennas in the target number of antennas in each transmission period are the same as the antennas determined in other transmission periods. Therefore, the base station determines the delay value of each antenna according to the difference value of the delay information of each antenna and the delay information of the target antenna. And a time delay relationship between antennas of each pRRU is obtained. The specific algorithm is as follows.
For example, the base station performs a polling transmission with two transmission periods, the first transmission period transmits a reference signal through four antennas of PRRU0,1,2, and 3, and the second transmission period transmits a reference signal through four antennas of 0,4,5,6, that is, PRRU0 is a target antenna for bridging during two transmission periods. The relative relationship between pRRU nos. 0 to 6 is calculated as follows.
For a first transmission period:
Delay1-0＝TA1(1)–TA0(1)；
Delay2-0＝TA2(1)–TA0(1)；
Delay3-0＝TA3(1)–TA0(1)。
in the above algorithm, "-" after Delay indicates the Delay difference between the two numbered pRRU, TA indicates the Delay value of the corresponding antenna, and the number 1 in the brackets indicates that the current transmission period is the first transmission period.
For the second transmission period.
Delay4-0＝TA4(2)–TA0(2)；
Delay5-0＝TA5(2)–TA0(2)；
Delay6-0＝TA6(2)–TA0(2)。
In the above algorithm, "-" after Delay indicates the Delay difference between the two numbered pRRU, TA indicates the Delay value of the corresponding antenna, and the number 2 in the brackets indicates that the current transmission period is the second transmission period.
By the algorithm, the time delay relative relation between all pRRUs and pRRU0 is obtained, so that the relative relation of time delay values among all pRRUs can be obtained.
The time delay information among the pRRUs obtained by the method can lead the base station to guide the MU pairing selection according to the prior information of the influence of the time delay difference on the MU performance. If the time delay is smaller, the base station adopts the MU mode to communicate, otherwise, if the time delay is larger, the base station adopts the SU mode to communicate, so that the base station can switch the working mode through the time delay information. The MIMO system is ensured to work under the optimal condition all the time.
The delay evaluation method provided by the embodiment of the application comprises the following steps: the base station transmits reference signals to the target terminal in a polling way through at least two transmission periods, wherein the base station comprises a plurality of antennas, the base station determines target number of the antennas for transmitting the reference signals in each transmission period, the target number is equal to the number of the antennas which can be measured by the target terminal, and the reference signals are used for enabling the target terminal to measure the time delay of the antennas; the base station acquires feedback information from the target terminal, wherein the feedback information is time delay information obtained by the target terminal through measuring an antenna for transmitting a reference signal according to the reference signal; and the base station determines the delay values of the plurality of antennas according to the feedback information. The base station overcomes the problem that the number of antennas measured by the terminal is not matched with the actual number of antennas of the base station in a polling transmission mode. Thus, the terminal can measure the time delay condition of each antenna of the base station. The evaluation of the base station to the time delay condition in the MIMO system is realized.
The method may be implemented by one entity device, may be implemented by a plurality of entity devices together, or may be a logic functional module in one entity device, which is not limited in detail in the embodiment of the present application.
For example, the above method may be implemented by the electronic device in fig. 3. Fig. 3 is a schematic hardware structure of an electronic device according to an embodiment of the present application; the electronic device may be an electronic device in the embodiment of the present invention, or may be a terminal device. The electronic device comprises at least one processor 301, communication lines 302, a memory 303 and at least one communication interface 304.
The processor 301 may be a general purpose central processing unit (central processing unit, CPU), microprocessor, application-specific integrated circuit (server IC), or one or more integrated circuits for controlling the execution of programs in accordance with aspects of the present application.
Communication line 302 may include a pathway to transfer information between the above-described components.
Communication interface 304, using any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.
The memory 303 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disc storage, a compact disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be stand alone and be coupled to the processor via communication line 302. The memory may also be integrated with the processor.
The memory 303 is used for storing computer-executable instructions for executing the embodiments of the present application, and is controlled by the processor 301 to execute the instructions. The processor 301 is configured to execute computer-executable instructions stored in the memory 303, thereby implementing the method for charging management provided in the embodiments described below.
Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application program codes, which are not specifically limited in the embodiments of the present application.
In a particular implementation, as one embodiment, processor 301 may include one or more CPUs, such as CPU0 and CPU1 of FIG. 3.
In a particular implementation, as one embodiment, an electronic device may include multiple processors, such as processor 301 and processor 307 in FIG. 3. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).
In a specific implementation, the electronic device may also include an output device 305 and an input device 306, as one embodiment. The output device 305 communicates with the processor 301 and may display information in a variety of ways. For example, the output device 305 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 306 is in communication with the processor 301 and may receive user input in a variety of ways. For example, the input device 306 may be a mouse, keyboard, touch screen device, or sensing device, among others.
The electronic device may be a general purpose device or a special purpose device. In particular implementations, the electronic device may be a server, a wireless terminal device, an embedded device, or a device having a similar structure. The embodiments of the present application are not limited to the type of electronic device.
The embodiment of the application may divide the functional units of the electronic device according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units may be implemented in hardware or in software functional units. It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice.
For example, in the case of dividing each functional unit in an integrated manner, fig. 4 shows a schematic structural diagram of a delay evaluating apparatus provided in an embodiment of the present application.
As shown in fig. 4, the delay evaluating apparatus provided in the embodiment of the present application includes:
a transmitting unit 401, configured to transmit a reference signal to a target terminal, where the base station includes a plurality of antennas, and the reference signal is used to enable the target terminal to measure a delay of the antennas;
An obtaining unit 402, configured to obtain feedback information from the target terminal, where the feedback information is delay information obtained by the target terminal by measuring an antenna that sends a reference signal according to the reference signal sent by the sending unit 401;
an execution unit 403, configured to determine delay values of the plurality of antennas according to the feedback information acquired by the acquisition unit 402.
Optionally, the sending unit 401 is further configured to:
the base station transmits reference signals to the target terminal in a polling way through at least two transmission periods, and in each transmission period, the base station determines a target number of antennas for transmitting the reference signals, wherein the target number is equal to the number of antennas which can be measured by the target terminal;
in one of the transmission periods, some of the target antennas in the target number of antennas are identical to antennas determined in other transmission periods.
Optionally, the obtaining unit 402 is further configured to:
respectively acquiring time delay information of each antenna from the target terminal;
the execution unit 403 is further configured to:
and determining the delay value of each antenna according to the difference value of the delay information of each antenna and the delay information of the target antenna.
Optionally, the sending unit 401 is further configured to:
the method comprises the steps that a channel state information reference signal (CSI-RS) is sent to a target terminal in a polling mode through an antenna in a low-power radio frequency unit (pRRU);
The obtaining unit 402 is further configured to:
acquiring a time delay TA value from the target terminal;
the execution unit 403 is further configured to:
according to the difference of TA values between the plurality of antennas and the target antenna.
Optionally, the base station includes a plurality of radio frequency units, each radio frequency unit includes a plurality of antennas, and the execution unit 403 is further configured to:
and respectively determining one antenna from the target number of radio frequency units as the target number of antennas.
Optionally, the execution unit 403 is further configured to:
configuring a target reference signal;
the sending unit 401 is further configured to:
in each transmission period, each antenna of the target number of antennas transmits one of the target reference signals, respectively.
Optionally, the execution unit 403 is further configured to: the target terminal is determined based on the signal power.
As shown in fig. 5, another delay evaluating apparatus provided in an embodiment of the present application includes:
an acquisition unit 501 for acquiring a reference signal from a target antenna of a base station, the reference signal being used to cause the terminal to perform time delay measurement;
a measurement unit 502, configured to measure delay information of the target antenna according to the reference signal acquired by the acquisition unit 501;
a transmitting unit 503, configured to transmit the delay information measured by the measuring unit 502 to the base station, so that the base station determines the delay condition of the target antenna according to the delay information.
Optionally, the sending unit 503 is further configured to:
the terminal transmits sounding reference signals SRS to each antenna of the base station, respectively, the SRS being used to cause the base station to measure reference signal power between the terminal and each antenna of the base station.
Optionally, the obtaining unit 501 is further configured to:
acquiring a channel state information reference signal (CSI-RS) from a target antenna in a low-power radio frequency unit (pRRU) of a base station;
the measurement unit 502 is further configured to:
the terminal obtains a time delay TA value of a target antenna according to the CSI-RS;
the sending unit 503 is further configured to:
the terminal transmits the TA value to the base station.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., such as an electrical cable, optical fiber, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system, apparatus and unit may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the embodiments provided in the present application, it should be understood that the disclosed communication method, relay device, host base station, and computer storage medium may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in whole or in part in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (12)
1. A method of delay evaluation, comprising:
the base station transmits a reference signal to a target terminal, including: the base station polls and transmits the reference signal to the target terminal through at least two transmission periods, and the base station determines a target number of antennas for transmitting the reference signal in each transmission period, wherein the target number is equal to the number of antennas which can be measured by the target terminal; in one transmission period, part of target antennas in the target number of antennas are the same as antennas determined in other transmission periods; the base station comprises a plurality of antennas, and the reference signals are used for enabling the target terminal to measure the time delay of the antennas;
The base station acquires feedback information from the target terminal, wherein the feedback information is time delay information obtained by measuring an antenna for transmitting a reference signal according to the reference signal by the target terminal;
the base station determines delay values of the plurality of antennas according to the feedback information;
the base station polls and transmits a reference signal to a target terminal through at least two transmission periods, and the method comprises the following steps: the base station transmits a channel state information reference signal (CSI-RS) to a target terminal in a polling mode through an antenna in a low-power radio frequency unit (pRRU).
2. The method of claim 1, wherein the base station obtaining feedback information from the target terminal comprises:
the base station respectively acquires time delay information of each antenna from the target terminal;
the base station determines the time delay of the plurality of antennas according to the feedback information, and the method comprises the following steps:
and the base station determines the delay value of each antenna according to the difference value of the delay information of each antenna and the delay information of the target antenna.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises,
the base station obtaining feedback information from the target terminal, including:
the base station acquires a time delay TA value from the target terminal;
The base station determines the time delay values of the plurality of antennas according to the feedback information, and the method comprises the following steps:
the base station is based on the difference in TA values between the plurality of antennas and the target antenna.
4. A method according to any one of claims 1 to 3, wherein the base station comprises a plurality of radio frequency units, each radio frequency unit comprising a plurality of antennas, the base station determining a target number of antennas for transmitting the reference signal in each transmission period, comprising:
and the base station respectively determines one antenna from the target number of radio frequency units as the target number of antennas.
5. A method according to any one of claims 1 to 3, wherein before the base station polls the target terminal for reference signals by at least two transmission periods, further comprising:
the base station configures a target reference signal;
the base station polls and transmits a reference signal to a target terminal through at least two transmission periods, and the method comprises the following steps:
in each transmission period, each antenna in the target number of antennas transmits one target reference signal respectively.
6. A method according to any one of claims 1 to 3, wherein before the base station polls the target terminal for reference signals by at least two transmission periods, further comprising:
And the base station determines the target terminal according to the signal power.
7. A method of delay evaluation, comprising:
the terminal obtains a reference signal from a target antenna of a base station, including: a terminal acquires a channel state information reference signal (CSI-RS) from a target antenna in a low-power radio frequency unit (pRRU) of a base station, wherein the reference signal is used for enabling the terminal to execute time delay measurement;
the terminal generates feedback information, wherein the feedback information is time delay information obtained by measuring an antenna for transmitting a reference signal according to the reference signal by the terminal;
the terminal measures the time delay information of the target antenna according to the reference signal, and the method comprises the following steps: the terminal obtains a time delay TA value of a target antenna according to the CSI-RS;
the terminal sends the time delay information to the base station, which comprises the following steps: the terminal sends the TA value to the base station so that the base station determines the time delay condition of the target antenna according to the time delay information;
wherein, before the terminal obtains the reference signal from the target antenna of the base station, the method further comprises: and the terminal respectively sends sounding reference signals SRS to each antenna of the base station.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
the SRS is used to cause the base station to measure reference signal power between the terminal and respective antennas of the base station.
9. A delay evaluating apparatus, comprising:
a transmitting unit, configured to transmit a reference signal to a target terminal, where a base station includes a plurality of antennas, and the reference signal is used to enable the target terminal to measure a time delay of the antennas;
the sending unit is specifically configured to poll the target terminal for sending the reference signal through at least two sending periods, where in each sending period, the base station determines a target number of antennas for sending the reference signal, where the target number is equal to the number of antennas that can be measured by the target terminal; in one transmission period, part of target antennas in the target number of antennas are the same as antennas determined in other transmission periods;
the acquisition unit is used for acquiring feedback information from the target terminal, wherein the feedback information is time delay information obtained by measuring an antenna for transmitting a reference signal by the target terminal according to the reference signal transmitted by the transmission unit;
the execution unit is used for determining the time delay values of the plurality of antennas according to the feedback information acquired by the acquisition unit;
The transmitting unit is specifically configured to poll and transmit a channel state information reference signal CSI-RS to the target terminal through an antenna in the low-power radio frequency unit pRRU.
10. A delay evaluating apparatus, comprising:
an acquisition unit, configured to acquire a reference signal from a target antenna of a base station, where the reference signal is used to enable a terminal to perform delay measurement;
the acquiring unit is specifically configured to acquire a channel state information reference signal CSI-RS from a target antenna in a low-power radio frequency unit pRRU of the base station;
the generating unit is used for generating feedback information, wherein the feedback information is time delay information obtained by measuring an antenna for transmitting a reference signal according to the reference signal by the terminal;
a measurement unit, configured to measure delay information of the target antenna according to the reference signal acquired by the acquisition unit;
the measuring unit is specifically configured to obtain a time delay TA value of a target antenna according to the CSI-RS;
a sending unit, configured to send the delay information measured by the measurement unit to the base station, so that the base station determines a delay condition of the target antenna according to the delay information;
the sending unit is specifically configured to send the TA value to the base station;
The transmitting unit is further configured to transmit sounding reference signals SRS to respective antennas of a base station before the acquiring unit acquires reference signals from a target antenna of the base station.
11. An electronic device, the electronic device comprising: an interaction device, an input/output (I/O) interface, a processor, and a memory, the memory having program instructions stored therein;
the interaction device is used for acquiring an operation instruction input by a user;
the processor is configured to execute program instructions stored in a memory and to perform the method of any one of claims 1-6 or 7-8.
12. A computer readable storage medium comprising instructions which, when run on a computer device, cause the computer device to perform the method of any of claims 1-6 or 7-8.
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