CN112333732A - Cell measurement method and device - Google Patents
Cell measurement method and device Download PDFInfo
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- CN112333732A CN112333732A CN202011135094.5A CN202011135094A CN112333732A CN 112333732 A CN112333732 A CN 112333732A CN 202011135094 A CN202011135094 A CN 202011135094A CN 112333732 A CN112333732 A CN 112333732A
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Abstract
The embodiment of the application provides a cell measurement method and a device, when cell measurement is carried out at the current test time, a new physical broadcast channel is reconstructed based on previously received main information block information of a physical broadcast channel in an SSB of a cell to be measured, and a first measurement value is obtained by adopting a new physical broadcast channel reconstruction mode; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value by adopting a non-physical broadcast channel reconstruction mode; determining whether the master information block information is changed according to the first measurement value and the second measurement value; the influence of the change of the master information block information on the cell measurement result is fully considered, the cell to be measured is measured according to the judgment result of whether the master information block information is changed, whether the MIB information is changed or not can be detected in time, and the accuracy of cell measurement is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell measurement method and apparatus.
Background
In a New Radio (NR) system, a terminal performs cell measurement using a synchronization signal and a PBCH block (SSB). The SSB is a Physical Broadcast Channel (PBCH) channel of a cell and carries Master Information Block (MIB) information of the cell. The MIB information includes the system frame number of the cell and other information, which is usually unchanged except that the system frame number of the cell changes with time. Therefore, the system frame number information in the MIB information can be reconstructed according to the actual measurement time and the time difference between the last demodulation of the MIB information, and the entire PBCH can be reconstructed by combining with other generally invariant information, and cell measurement can be performed based on the reconstructed PBCH.
When cell measurement is performed based on the reconstructed PBCH, if information other than the system frame number in MIB information of a cell is changed, an error may occur in the PBCH reconstructed based on the information other than the system frame number in MIB information, and cell measurement performed based on the erroneous PBCH may also result in low accuracy of cell measurement. Therefore, how to detect whether the information other than the system frame number in the MIB information of the cell changes in time to improve the accuracy of cell measurement is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a cell measurement method and a cell measurement device, which can detect whether information except a system frame number in MIB information of a cell is changed or not in time when the cell measurement is carried out, thereby improving the accuracy of the cell measurement.
In a first aspect, an embodiment of the present application provides a cell measurement method, where the cell measurement method may include:
reconstructing a new physical broadcast channel based on the main information block information at the current test moment, and acquiring a first measurement value by adopting a new physical broadcast channel reconstruction mode; wherein the master information block information is obtained by demodulating a previously received physical broadcast channel in the SSB of the cell to be measured.
And if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode.
And determining whether the master information block information is changed according to the first measurement value and the second measurement value.
And measuring the cell to be measured according to the judgment result.
In one possible implementation, the change detection condition includes: the new physical broadcast channel reconstruction is a continuous Nth physical broadcast channel reconstruction, and N is greater than a first threshold value; and/or the difference value between the measured value obtained by adopting the new physical broadcast channel reconstruction mode and the measured value obtained by adopting the previous physical broadcast channel reconstruction mode is larger than a second threshold value.
In a possible implementation manner, the measuring the cell to be measured according to the determination result includes:
and if the judgment result indicates that the main information block information is changed, measuring the cell to be measured by adopting a non-physical broadcast channel reconstruction mode until new re-demodulated main information block information is obtained.
And if the judgment result indicates that the information of the main information block is not changed, continuing to adopt the new physical broadcast channel reconstruction mode to measure the cell to be measured.
In a possible implementation manner, the determining whether the master information block information is changed according to the first measurement value and the second measurement value includes:
calculating a difference between the first measurement and the second measurement.
And determining whether the information of the main information block is changed or not according to the difference value.
In a possible implementation manner, the determining whether the master information block information is changed according to the difference includes:
and if the difference value is smaller than a preset threshold value, determining that the information of the main information block is changed.
And if the difference is larger than or equal to a preset threshold value, determining that the information of the main information block is not changed.
In a possible implementation manner, the new physical broadcast channel includes a demodulation reference signal, and the obtaining a first measurement value by using the new physical broadcast channel reconstruction manner includes:
and reconstructing the new physical broadcast channel to obtain channel estimation and noise estimation corresponding to the new physical broadcast channel.
Finding out the channel estimation and the noise estimation corresponding to the demodulation reference signal and/or the secondary synchronization signal sequence in the channel estimation and the noise estimation corresponding to the new physical broadcast channel; wherein the secondary synchronization signal sequence is obtained by performing sequence detection on the previously received SSB of the cell to be measured.
And calculating to obtain the first measurement value according to the channel estimation and the noise estimation corresponding to the demodulation reference signal and/or the secondary synchronization signal sequence.
In a possible implementation manner, the new physical broadcast channel includes a demodulation reference signal, and the obtaining the second measurement value by using the non-physical broadcast channel reconstruction manner includes:
reconstructing the demodulation reference signal or the auxiliary synchronization signal sequence to obtain channel estimation and noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence; wherein the secondary synchronization signal sequence is obtained by performing sequence detection on the previously received SSB of the cell to be measured.
And calculating to obtain the second measurement value according to the channel estimation and the noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence.
In a second aspect, an embodiment of the present application further provides a cell measurement apparatus, where the cell measurement apparatus may include:
the processing unit is used for reconstructing a new physical broadcast channel based on the main information block information at the current test time and acquiring a first measurement value by adopting a new physical broadcast channel reconstruction mode; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode; wherein the master information block information is obtained by demodulating a previously received physical broadcast channel in the SSB of the cell to be measured.
The processing unit is further configured to determine whether the master information block information is changed according to the first measurement value and the second measurement value.
And the measuring unit is used for measuring the cell to be measured according to the judgment result.
In one possible implementation, the change detection condition includes: the new physical broadcast channel reconstruction is a continuous Nth physical broadcast channel reconstruction, and N is greater than a first threshold value; and/or the difference value between the measured value obtained by adopting the new physical broadcast channel reconstruction mode and the measured value obtained by adopting the previous physical broadcast channel reconstruction mode is larger than a second threshold value.
In a possible implementation manner, the measurement unit is specifically configured to measure the cell to be measured by using a non-physical broadcast channel reconfiguration mode if the determination result indicates that the master information block information is changed, until new re-demodulated master information block information is obtained; and if the judgment result indicates that the information of the main information block is not changed, continuing to adopt the new physical broadcast channel reconstruction mode to measure the cell to be measured.
In a possible implementation manner, the processing unit is specifically configured to calculate a difference between the first measurement value and the second measurement value; and determining whether the information of the main information block is changed according to the difference value.
In a possible implementation manner, the processing unit is specifically configured to determine that the master information block information is changed if the difference is smaller than a preset threshold; and if the difference is larger than or equal to a preset threshold value, determining that the information of the main information block is not changed.
In a possible implementation manner, the new physical broadcast channel includes a demodulation reference signal, and the processing unit is specifically configured to reconstruct the new physical broadcast channel to obtain a channel estimation and a noise estimation corresponding to the new physical broadcast channel; finding out the channel estimation and the noise estimation corresponding to the demodulation reference signal and/or the secondary synchronization signal sequence in the channel estimation and the noise estimation corresponding to the new physical broadcast channel; calculating to obtain the first measurement value according to the channel estimation and the noise estimation corresponding to the demodulation reference signal and/or the auxiliary synchronization signal sequence; wherein the secondary synchronization signal sequence is obtained by performing sequence detection on the previously received SSB of the cell to be measured.
In a possible implementation manner, the new physical broadcast channel includes a demodulation reference signal, and the processing unit is specifically configured to reconstruct the demodulation reference signal or the secondary synchronization signal sequence to obtain a channel estimation and a noise estimation corresponding to the demodulation reference signal or the secondary synchronization signal sequence; calculating to obtain the second measurement value according to the channel estimation and the noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence; wherein the secondary synchronization signal sequence is obtained by performing sequence detection on the previously received SSB of the cell to be measured.
In a third aspect, an embodiment of the present application further provides a cell measurement apparatus, where the apparatus includes a processor and a memory, where the memory stores a computer program, and the processor executes the computer program stored in the memory, so as to cause the apparatus to perform the cell measurement method as described in any one of the foregoing possible implementation manners of the first aspect.
In a fourth aspect, the present application further provides a readable storage medium, which stores instructions that, when executed, cause the cell measurement method described in any one of the foregoing possible implementations of the first aspect to be implemented.
Therefore, when cell measurement is performed at the current test time, a new physical broadcast channel is reconstructed based on the information of the master information block obtained by demodulating the previously received physical broadcast channel in the SSB of the cell to be measured, and a first measurement value is obtained by adopting the new physical broadcast channel reconstruction method; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode; determining whether the information of the master information block is changed or not according to the first measurement value and the second measurement value; the method and the device can fully consider the influence of the change of the master information block information on the cell measurement result, measure the cell to be measured according to the judgment result of whether the master information block information is changed, and can timely detect whether the MIB information of the cell is changed compared with the prior art that when the MIB information of the cell is changed and cell measurement is carried out based on the MIB information before the change, thereby improving the accuracy of cell measurement.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic time-frequency structure diagram of an SSB according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a time slot boundary between a serving cell and an adjacent cell according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a cell measurement method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a cell measurement apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another cell measurement apparatus according to an embodiment of the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the present invention, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The cell measurement method provided by the embodiment of the application can be applied to a cell measurement scene. In a New Radio (NR) system, when a terminal uses a synchronization signal and a PBCH block (SSB) reference signal to perform cell measurement, since the SSB is also a Physical Broadcast Channel (PBCH) channel of a cell and carries a Master Information Block (MIB) of the cell; the MIB information includes the system frame number of the cell and other information, which is usually unchanged except that the system frame number of the cell may change over time. Since the master information block information is not involved when the cell measurement is performed by adopting the non-physical broadcast channel reconfiguration method, whether information except the system frame number of the cell in the MIB information is changed or not is not required to be considered in a scenario in which the cell measurement is performed by adopting the non-physical broadcast channel reconfiguration method, and therefore, the cell measurement method provided by the embodiment of the application is specifically applied to a scenario in which the cell measurement is performed by adopting the physical broadcast channel reconfiguration method.
For example, please refer to fig. 1, fig. 1 is a schematic time-frequency structure diagram of an SSB provided in the embodiment of the present application, where the SSB is composed of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a PBCH. The SSB occupies 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, and occupies 20 (resource block, RB) subcarriers in the frequency domain, where the subcarrier number is 0 to 239.
As can be seen in connection with fig. 1, in the SSB, the PSS is located at the middle 127 subcarriers of symbol 0. The SSS is located in the middle 127 subcarriers of symbol 2. In order to protect the PSS and the SSS, different subcarriers Set 0 are respectively Set at both ends of the PSS and the SSS. PBCH is located at symbol 1/3 and symbol 2, wherein symbol 1/3 occupies all subcarriers of 0-239, and symbol 2 occupies all subcarriers except subcarriers occupied by SSS and subcarriers Set 0 for protecting SSS. The DMRS is located in the middle of the PBCH, and is set on 1/3 of the symbols, 60 subcarriers are provided on each symbol, and specifically, see table 1 below:
TABLE 1
Where k denotes a frequency domain index within the SSB, l denotes a time domain index within the SSB,
set 0 indicates that the terminal can assume that the RE of the portion in table 1 is Set to 0.
As shown in fig. 1 and table 1, when performing cell measurement, the cell measurement may be performed based on DMRS and MIB information, because for a cell, the DMRD is fixed and unchanged, the system frame number information in the MIB information may be reconstructed according to the actual measurement time and the time difference between the last demodulation of MIB information, and then the entire PBCH may be reconstructed by combining with other generally unchanged information, and the cell measurement may be performed based on the reconstructed PBCH. However, with this cell measurement method, if the information other than the system frame number in the MIB information of the cell is changed, the PBCH reconstructed based on the information other than the system frame number in the MIB information may be erroneous, and the accuracy of cell measurement may also be low when the cell measurement is performed based on the erroneous PBCH. Therefore, how to detect whether the information other than the system frame number in the MIB information of the cell changes in time to improve the accuracy of cell measurement is an urgent problem to be solved by those skilled in the art.
In order to detect whether the information except the system frame number in the MIB information of the cell is changed in time, the network indication information sent by the network device may be received through paging, where the network indication information is used to indicate that the information except the system frame number in the MIB information is changed, and indicate the terminal to re-receive the PBCH and re-demodulate to obtain a new MIB. But the mode of determining that the information except the system frame number in the MIB information is changed through the network indication information issued by the paging receiving network device is only suitable for the scenario in which the cell to be measured is the serving cell where the terminal is currently located. When the cell to be measured is a neighbor cell of the serving cell where the terminal is currently located, in a normal case, because a local clock in the terminal is aligned with the serving cell, and a time slot boundary of the neighbor cell may not be aligned with a character boundary of a reference signal, as shown in fig. 2, which is a schematic time slot boundary diagram of the serving cell and the neighbor cell provided in the embodiment of the present application, it can be seen that a time slot boundary of the serving cell and a time slot boundary of the neighbor cell are deviated and not aligned, therefore, a manner in which the terminal determines that information other than system frame number in MIB information is changed through network indication information issued by a paging receiving network device is not adaptable to a scenario in which the cell to be measured is a neighbor cell of the serving cell where the terminal is currently located, when the cell to be measured is a neighbor cell of the serving cell where the terminal is currently located, the terminal only re-demodulates PBCH of the neighbor cell to obtain a new MIB, it can be determined that information other than the system frame number in the MIB information has changed.
When the cell to be measured is a neighbor of a serving cell in which the terminal is currently located, considering that when information except the system frame number in the MIB information is changed, a difference between a measured value obtained by reconstructing a new physical broadcast channel by using the master information block information and a measured value obtained by reconstructing a non-physical broadcast channel is large, it may be tried to determine whether the information except the system frame number in the MIB information is changed by reconstructing the new physical broadcast channel by using the master information block information and a measured value obtained by reconstructing the non-physical broadcast channel, and measure the cell to be measured according to the determination result. It can be understood that the method is also applicable to the measurement of the serving cell, except that when the serving cell is measured, in addition to the method, the network indication information sent by the network device may also be received by paging, where the network indication information is used to indicate whether information other than the system frame number in the MIB information has changed, and indicate the terminal to re-receive the PBCH and re-demodulate to obtain a new MIB.
Based on the above concept, the present application provides a cell measurement method, when performing cell measurement, a terminal reconstructs a new physical broadcast channel based on master information block information at a current test time, wherein the master information block information is obtained by demodulating a previously received physical broadcast channel in an SSB of a cell to be measured; acquiring a first measurement value by adopting a new physical broadcast channel reconstruction mode; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode; determining whether the information of the master information block is changed or not according to the first measurement value and the second measurement value; and measuring the cell to be measured according to the judgment result.
The cell to be measured may be a serving cell where the terminal is currently located or a neighboring cell of the serving cell, and may be specifically set according to actual needs, where the embodiment of the present application does not further limit which cell the cell to be measured is specifically.
For example, in the embodiment of the present application, the changing the detection condition includes: reconstructing the new physical broadcast channel into N-th continuous physical broadcast channel reconstruction, wherein N is larger than a first threshold value; and/or the difference value between the measured value obtained by adopting the new physical broadcast channel reconstruction mode and the measured value obtained by adopting the previous physical broadcast channel reconstruction mode is larger than a second threshold value. By setting the change detection condition in advance, the following advantages are obtained: when the change detection condition is met, the change of the master information block information is probably caused to a great extent, so that when the change detection condition is met, whether the master information block information is changed or not can be determined according to the first measurement value and the second measurement value, and the judgment can be more targeted. Here, the embodiments of the present application merely change the detection conditions to include: reconstructing the new physical broadcast channel into N-th continuous physical broadcast channel reconstruction, wherein N is larger than a first threshold value; and/or, the difference between the measurement value obtained by the new physical broadcast channel reconfiguration and the measurement value obtained by the previous physical broadcast channel reconfiguration is greater than the second threshold is taken as an example for description, but the embodiment of the present application is not limited thereto. The values of the first threshold and the second threshold may be set according to actual needs, and the embodiments of the present application are not further limited to the values of the first threshold and the second threshold.
It can be understood that, in the embodiment of the present application, whether the information of the master information block is changed or not is determined, and the main idea thereof is to determine whether the information of the master information block other than the system frame number is changed or not, and is not limited to indicating whether the system frame number in the master information block is changed or not, because the system frame number is changed with time, the system frame number is always changed based on the time change.
It can be seen that, in the embodiment of the present application, when cell measurement is performed at the current test time, a new physical broadcast channel is reconstructed based on the master information block information obtained by demodulating the previously received physical broadcast channel in the SSB of the cell to be measured, and a first measurement value is obtained by using the new physical broadcast channel reconstruction; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode; determining whether the information of the master information block is changed or not according to the first measurement value and the second measurement value; the method and the device can fully consider the influence of the change of the master information block information on the cell measurement result, measure the cell to be measured according to the judgment result of whether the master information block information is changed, and can timely detect whether the MIB information of the cell is changed compared with the prior art that when the MIB information of the cell is changed and cell measurement is carried out based on the MIB information before the change, thereby improving the accuracy of cell measurement.
Among them, 1) a terminal, also called User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device providing voice/data connectivity to a user, for example, a handheld device or a vehicle-mounted device with a wireless connection function. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.
Hereinafter, the cell measurement method provided in the embodiments of the present application will be described in detail by using several specific embodiments described below. It is understood that, in the embodiments of the present application, the following specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 3 is a flowchart illustrating a cell measurement method according to an embodiment of the present disclosure, where the cell measurement method may be executed by software and/or a hardware device, and the hardware device may be a terminal. For example, referring to fig. 3, the cell measurement method may include:
s301, at the current test moment, reconstructing a new physical broadcast channel based on the main information block information, and acquiring a first measurement value by adopting a new physical broadcast channel reconstruction mode.
The information of the master information block includes the system frame number of the cell and other information, and the other information is usually not changed except that the system frame number of the cell is changed with time.
In the embodiment of the present application, the master information block information is obtained by demodulating a previously received physical broadcast channel in the SSB of the cell to be measured. It can be understood that, in the embodiment of the present application, if the MIB is never changed before the current measurement, the previously received cell to be measured may be understood as obtaining the SSB of the cell to be measured when the cell measurement is performed for the first time; if the MIB is changed before the current measurement, it may also be understood that before the current measurement, when the MIB information is changed for the last time, the SSB of the cell to be measured where the MIB information is located may be specifically set according to actual needs, and here, the previously received SSB of the cell to be measured specifically refers to which received SSB of the cell to be measured, which is not further limited in the embodiment of the present application.
It is understood that the main information block information needs to be acquired before reconstructing a new physical broadcast channel based on the main information block information at the current test time. When the main information block information is obtained by demodulating the previously received physical broadcast channel in the SSB of the cell to be measured, the time position information of the SSB of the cell to be measured can be obtained first in a synchronous manner, and the SSB of the cell to be measured is received on the time position information of the SSB of the cell to be measured; after receiving the SSB of the cell to be measured, the physical broadcast channel in the SSB is demodulated, thereby acquiring the master information block information.
When reconstructing a new physical broadcast channel based on the acquired master information block information, the new physical broadcast channel is mainly reconstructed based on other information, which is not changed in general, except for the system frame number in the master information block information. After the new physical broadcast channel is obtained through reconstruction, the first measurement value can be obtained in a new physical broadcast channel reconstruction mode. Illustratively, the new physical broadcast channel includes a demodulation reference signal.
For example, when the first measurement value is obtained by using a new physical broadcast channel reconstruction method, the new physical broadcast channel may be reconstructed first to obtain a channel estimation and a noise estimation corresponding to the new physical broadcast channel; in the channel estimation and noise estimation corresponding to the new physical broadcast channel, finding out a demodulation reference signal and/or a channel estimation and noise estimation corresponding to a secondary synchronization signal sequence obtained by carrying out sequence detection on the previously received SSB of the cell to be measured; and then, calculating to obtain a first measurement value according to channel estimation and noise estimation corresponding to the demodulation reference signal and/or the auxiliary synchronization signal sequence. Wherein the secondary synchronization signal sequence is associated with a cell number of the cell to be measured. Illustratively, the first measurement includes a first reference signal received power and a first signal-to-noise ratio.
It can be understood that, in the embodiment of the present application, by using the new physical broadcast channel reconfiguration to obtain the first measurement value, this has the following advantages: in the evaluation of the channel estimation and the noise estimation, the influence of the whole new physical broadcast channel is considered, the whole new physical broadcast channel is reconstructed to obtain the channel estimation and the noise estimation corresponding to the whole new physical broadcast channel, and the first measurement value is calculated and obtained further according to the channel estimation and the noise estimation corresponding to the demodulation reference signal and/or the auxiliary synchronization signal sequence, so that the obtaining precision of the first measurement value can be improved.
In order to detect whether the information except the system frame number in the MIB information of the cell is changed in time when the cell measurement is performed, thereby improving the accuracy of the cell measurement, after the first measurement value is obtained by adopting a new physical broadcast channel reconfiguration every time, whether the reconfiguration of the new physical broadcast channel satisfies the change detection condition can be determined, if the reconfiguration of the new physical broadcast channel does not satisfy the change detection condition, it is indicated that the master information block information is not changed to a great extent, therefore, the subsequent S302-S304 need not be executed, but the physical broadcast channel reconfiguration is continuously adopted to perform the cell measurement, of course, in order to further determine whether the master information block information is changed and determine which manner is adopted to perform the cell measurement, the reconfiguration of the new physical broadcast channel does not satisfy the change detection condition, subsequent S302-S304 may also be performed to determine which way to perform cell measurements. On the contrary, if the reconfiguration of the new physical broadcast channel satisfies the change detection condition, it indicates that the information of the master information block is changed to a large extent, and therefore, the following S302-S304 may be performed to determine which method to perform cell measurement.
S302, if the new physical broadcast channel reconstruction meets the change detection condition, a non-physical broadcast channel reconstruction mode is adopted to obtain a second measurement value.
For example, in the embodiment of the present application, the changing the detection condition includes: reconstructing the new physical broadcast channel into N-th continuous physical broadcast channel reconstruction, wherein N is larger than a first threshold value; and/or the difference value between the measured value obtained by adopting the new physical broadcast channel reconstruction mode and the measured value obtained by adopting the previous physical broadcast channel reconstruction mode is larger than a second threshold value. For example, the SNR obtained by the new physical broadcast channel reconstruction differs by more than 5db from the Signal-to-noise ratio (SNR) obtained by the previous physical broadcast channel reconstruction.
By presetting the change detection condition, when the change detection condition is met, the method inserts one-time measurement in a non-physical broadcast channel reconstruction mode, and has the advantages that: when the change detection condition is met, the change of the master information block information is probably caused to a great extent, so that when the change detection condition is met, whether the master information block information is changed or not can be determined according to the first measurement value and the second measurement value, and the judgment can be more targeted.
For example, when the second measurement value is obtained by using a non-physical broadcast channel reconstruction method, a demodulation reference signal in a new physical broadcast channel or an auxiliary synchronization signal sequence obtained by performing sequence detection on a previously received SSB of a cell to be measured may be reconstructed to obtain a channel estimation and a noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence; and calculating to obtain a second measurement value according to the channel estimation and the noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence. Wherein the secondary synchronization signal sequence is associated with a cell number of the cell to be measured. Illustratively, the second measurement includes a second reference signal received power and a second signal to noise ratio.
It can be understood that, when the cell to be measured is a neighboring cell of the serving cell, the neighboring cell measurement is that the measurement frequency point receives data according to a time window, and a section of received data includes all cells to be measured under the frequency point, which may be synchronous or asynchronous; therefore, for the same neighbor cell, the measurement of the non-physical broadcast channel reconfiguration method and the measurement of the non-physical broadcast channel reconfiguration method are respectively performed, but for the software and hardware measurement accelerator, the measurement of only one more cell at the frequency point is performed. When the measurement is carried out through the full inspection and the measurement of the hardware measurement accelerator, the software selects a measurement frequency point, and the receiving configuration of the hardware such as RF, AGC, DFE and the like is set 1 time slot in advance; after data is received, software configures PBCH reconstruction of a measurement cell of the frequency point and/or a non-PBCH reconstruction mode, and then a measurement accelerator of hardware processes the PBCH reconstruction; the hardware accelerator processes the output result and then carries out post-processing by software so as to obtain a first measured value and a second measured value.
After the first measurement value is obtained by respectively adopting a new physical broadcast channel reconstruction mode and the second measurement value is obtained by adopting a non-physical broadcast channel reconstruction mode, whether the main information block information is really changed or not can be further determined according to the obtained first measurement value and the obtained second measurement value, that is, the following step S303 is executed:
and S303, determining whether the master information block information is changed according to the first measurement value and the second measurement value.
For example, when it is determined whether the master information block information is changed according to the first measurement value and the second measurement value, a difference value between the first measurement value and the second measurement value may be calculated; if the difference value is larger than a preset threshold value, determining that the information of the main information block is changed; on the contrary, if the difference is smaller than or equal to the preset threshold, it is determined that the master information block information is not changed.
Taking the example that the first measurement value includes a first reference signal received power and a first signal to noise ratio, and the second measurement value includes a second reference signal received power and a second signal to noise ratio, when determining whether the master information block information is changed according to the first reference signal received power, the first signal to noise ratio, the second reference signal received power and the second signal to noise ratio, a difference between the first reference signal received power and the second reference signal received power and a difference between the first signal to noise ratio and the second signal to noise ratio may be calculated, and whether the master information block information is changed may be determined according to the difference between the first reference signal received power and the second reference signal received power and the difference between the first signal to noise ratio and the second signal to noise ratio.
In one case, if the difference between the first reference signal received power minus the second reference signal received power is less than a first predetermined threshold, for example, 5 db; and/or if the difference value of the first signal-to-noise ratio minus the second signal-to-noise ratio is smaller than a second preset threshold value, for example, 3db, it indicates that the master information block information is changed, in this case, the cell to be measured is measured by adopting a non-physical broadcast channel reconstruction method, and MIB of the cell to be measured is triggered to be received and demodulated again, and the current measurement value is corrected; the cell measurement value is more accurate, and before the MIB is demodulated and updated, the cell to be measured is measured in a non-physical broadcast channel reconstruction mode until new master information block information which is demodulated again is obtained.
In another case, if the difference between the first reference signal received power minus the second reference signal received power is greater than or equal to a first preset threshold, for example, 5 db; and if the difference value of the first signal-to-noise ratio minus the second signal-to-noise ratio is greater than or equal to a second preset threshold value, for example, 3db, it indicates that the information of the master information block has not been changed, and in this case, the measurement of the cell to be measured can be continued by using a new physical broadcast channel reconfiguration.
It can be understood that, when the cell to be measured is the serving cell where the terminal is currently located, in addition to determining whether the master information block information is changed according to the difference between the first measurement value and the second measurement value, the network indication information issued by the network device may be received through paging, where the network indication information is used to indicate whether information other than the system frame number in the MIB information is changed, and indicate the terminal to receive the PBCH again and demodulate to obtain a new MIB. However, when the cell to be measured is a neighboring cell of the serving cell where the terminal is currently located, the terminal can determine that information other than the system frame number in the MIB information has changed only after receiving the PBCH of the neighboring cell again and re-demodulating the PBCH to obtain a new MIB.
After determining whether the change of the master information block information occurs according to the first measurement value and the second measurement value, the cell to be measured may be measured according to the determination result, that is, the following S304 is performed:
and S304, measuring the cell to be measured according to the judgment result.
For example, when a cell to be measured is measured according to a determination result, if the determination result indicates that the information of the master information block is changed, if a new physical broadcast channel reconfiguration mode is continuously adopted to measure the cell to be measured, the accuracy of measurement is inevitably low, and therefore, in this case, a non-physical broadcast channel reconfiguration mode is adopted to measure the cell to be measured, and MIB of the cell to be measured is triggered to be re-received and demodulated, and the current measurement value is corrected; the cell measurement value is more accurate, and before the MIB is demodulated and updated, the cell to be measured is measured in a non-physical broadcast channel reconstruction mode until new master information block information which is demodulated again is obtained; on the contrary, if the determination result indicates that the information of the main information block is not changed, the new physical broadcast channel reconfiguration mode can be continuously adopted to measure the cell to be measured.
It should be noted that, in the embodiment of the present application, for the cell to be measured whose determination result indicates that the master information block information is changed, if the previously received SSB data is stored in a Double Data Rate (DDR) memory, the software may schedule the hardware module responsible for PBCH demodulation to perform demodulation and decoding; if it is indeed necessary to re-receive data, the software arranges to trigger MIB re-reception and demodulation for the cell to be measured.
Therefore, in the embodiment of the application, when cell measurement is performed at the current test time, a new physical broadcast channel is reconstructed based on the information of the master information block obtained by demodulating the previously received physical broadcast channel in the SSB of the cell to be measured, and a first measurement value is obtained by adopting the new physical broadcast channel reconstruction; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode; determining whether the information of the master information block is changed or not according to the first measurement value and the second measurement value; the method and the device can fully consider the influence of the change of the master information block information on the cell measurement result, measure the cell to be measured according to the judgment result of whether the master information block information is changed, and can timely detect whether the MIB information of the cell is changed compared with the prior art that when the MIB information of the cell is changed and cell measurement is carried out based on the MIB information before the change, thereby improving the accuracy of cell measurement.
Fig. 4 is a schematic structural diagram of a cell measurement apparatus 40 according to an embodiment of the present application, for example, please refer to fig. 4, where the cell measurement apparatus 40 may include:
a processing unit 401, configured to reconstruct a new physical broadcast channel based on the master information block information at a current test time, and acquire a first measurement value by using a new physical broadcast channel reconstruction method; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode; wherein the master information block information is obtained by demodulating a previously received physical broadcast channel in the SSB of the cell to be measured.
The processing unit 401 is further configured to determine whether the master information block information is changed according to the first measurement value and the second measurement value.
A measuring unit 402, configured to measure the cell to be measured according to the determination result.
Optionally, the changing the detection condition includes: reconstructing the new physical broadcast channel into N-th continuous physical broadcast channel reconstruction, wherein N is larger than a first threshold value; and/or the difference value between the measured value obtained by adopting the new physical broadcast channel reconstruction mode and the measured value obtained by adopting the previous physical broadcast channel reconstruction mode is larger than a second threshold value.
Optionally, the measuring unit 402 is specifically configured to measure the cell to be measured by using a non-physical broadcast channel reconfiguration mode if the determination result indicates that the master information block information is changed, until new re-demodulated master information block information is obtained; and if the judgment result indicates that the information of the main information block is not changed, continuously adopting a new physical broadcast channel reconstruction mode to measure the cell to be measured.
Optionally, the processing unit 401 is specifically configured to calculate a difference between the first measurement value and the second measurement value; and determining whether the master information block information is changed according to the difference.
Optionally, the processing unit 401 is specifically configured to determine that the master information block information is changed if the difference is smaller than a preset threshold; and if the difference value is greater than or equal to the preset threshold value, determining that the information of the main information block is not changed.
Optionally, the new physical broadcast channel includes a demodulation reference signal, and the processing unit 401 is specifically configured to reconstruct the new physical broadcast channel to obtain channel estimation and noise estimation corresponding to the new physical broadcast channel; finding out channel estimation and noise estimation corresponding to a demodulation reference signal and/or a secondary synchronization signal sequence in channel estimation and noise estimation corresponding to a new physical broadcast channel; calculating to obtain a first measurement value according to channel estimation and noise estimation corresponding to the demodulation reference signal and/or the auxiliary synchronization signal sequence; wherein, the secondary synchronization signal sequence is obtained by performing sequence detection on the previously received SSB of the cell to be measured.
Optionally, the new physical broadcast channel includes a demodulation reference signal, and the processing unit 401 is specifically configured to reconstruct the demodulation reference signal or the secondary synchronization signal sequence to obtain channel estimation and noise estimation corresponding to the demodulation reference signal or the secondary synchronization signal sequence; calculating to obtain a second measurement value according to channel estimation and noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence; wherein, the secondary synchronization signal sequence is obtained by performing sequence detection on the previously received SSB of the cell to be measured.
The cell measurement apparatus 40 shown in the embodiment of the present application can execute the cell measurement method shown in any of the above embodiments, and the implementation principle and the beneficial effect thereof are similar to those of the cell measurement method, and reference may be made to the implementation principle and the beneficial effect of the cell measurement method, which are not described herein again.
Fig. 5 is a schematic structural diagram of another cell measurement apparatus 50 provided in the embodiment of the present application, for example, please refer to fig. 5, where the cell measurement apparatus 50 may include a processor 501 and a memory 502, a computer program is stored in the memory 502, and the processor 501 executes the computer program stored in the memory 502 to enable the apparatus to execute the cell measurement method shown in any one of the embodiments above, and the implementation principle and the beneficial effect thereof are similar to those of the cell measurement method, and no further description is given here.
The embodiment of the present application further provides a readable storage medium, which is used for storing instructions, and when the instructions are executed, the cell measurement method shown in any one of the above embodiments is implemented; or, when the instruction is executed, the cell measurement method shown in any of the above embodiments is implemented, and the implementation principle and the beneficial effect of the cell measurement method are similar to those of the cell measurement method, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The computer-readable storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions 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 solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method of cell measurement, comprising:
reconstructing a new physical broadcast channel based on the main information block information at the current test moment, and acquiring a first measurement value by adopting a new physical broadcast channel reconstruction mode; the master information block information is obtained by demodulating a previously received physical broadcast channel in an SSB of a cell to be measured;
if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode;
determining whether the master information block information is changed according to the first measurement value and the second measurement value;
and measuring the cell to be measured according to the judgment result.
2. The method of claim 1,
the change detection condition includes: the new physical broadcast channel reconstruction is a continuous Nth physical broadcast channel reconstruction, and N is greater than a first threshold value; and/or the difference value between the measured value obtained by adopting the new physical broadcast channel reconstruction mode and the measured value obtained by adopting the previous physical broadcast channel reconstruction mode is larger than a second threshold value.
3. The method according to claim 1, wherein the measuring the cell to be measured according to the determination result comprises:
if the judgment result indicates that the main information block information is changed, measuring the cell to be measured by adopting a non-physical broadcast channel reconstruction mode until new re-demodulated main information block information is obtained;
and if the judgment result indicates that the information of the main information block is not changed, continuing to adopt the new physical broadcast channel reconstruction mode to measure the cell to be measured.
4. The method of claim 1, wherein the determining whether the master information block information is altered according to the first measurement value and the second measurement value comprises:
calculating a difference between the first measurement and the second measurement;
and determining whether the information of the main information block is changed or not according to the difference value.
5. The method of claim 4, wherein the determining whether the master information block information is changed according to the difference value comprises:
if the difference value is smaller than a preset threshold value, determining that the information of the main information block is changed;
and if the difference is larger than or equal to a preset threshold value, determining that the information of the main information block is not changed.
6. The method according to any of claims 1-5, wherein the new physical broadcast channel includes demodulation reference signals, and the obtaining the first measurement value by reconstructing the new physical broadcast channel includes:
reconstructing the new physical broadcast channel to obtain channel estimation and noise estimation corresponding to the new physical broadcast channel;
finding out the channel estimation and the noise estimation corresponding to the demodulation reference signal and/or the secondary synchronization signal sequence in the channel estimation and the noise estimation corresponding to the new physical broadcast channel; wherein the secondary synchronization signal sequence is obtained by performing sequence detection on a previously received SSB of the cell to be measured;
and calculating to obtain the first measurement value according to the channel estimation and the noise estimation corresponding to the demodulation reference signal and/or the secondary synchronization signal sequence.
7. The method according to any one of claims 1 to 5, wherein the new physical broadcast channel includes a demodulation reference signal, and the obtaining the second measurement value by non-physical broadcast channel reconstruction comprises:
reconstructing the demodulation reference signal or the auxiliary synchronization signal sequence to obtain channel estimation and noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence; wherein the secondary synchronization signal sequence is obtained by performing sequence detection on a previously received SSB of the cell to be measured;
and calculating to obtain the second measurement value according to the channel estimation and the noise estimation corresponding to the demodulation reference signal or the auxiliary synchronization signal sequence.
8. A cell measurement apparatus, comprising:
the processing unit is used for reconstructing a new physical broadcast channel based on the main information block information at the current test time and acquiring a first measurement value by adopting a new physical broadcast channel reconstruction mode; if the new physical broadcast channel reconstruction meets the change detection condition, acquiring a second measurement value in a non-physical broadcast channel reconstruction mode; the master information block information is obtained by demodulating a previously received physical broadcast channel in an SSB of a cell to be measured;
the processing unit is further configured to determine whether the master information block information is changed according to the first measurement value and the second measurement value;
and the measuring unit is used for measuring the cell to be measured according to the judgment result.
9. A cell measurement arrangement, characterized in that the arrangement comprises a processor and a memory, in which a computer program is stored, which processor executes the computer program stored in the memory to cause the arrangement to perform the cell measurement method according to any of the claims 1-8 above.
10. A readable storage medium storing instructions which, when executed, cause the cell measurement method according to any one of claims 1-8 to be implemented.
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