CN110635828B - Channel quality information processing method and device - Google Patents
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Abstract
The application discloses a channel quality information processing method and a device, comprising the following steps: determining a beam set periodically transmitted on the prefabricated beam by the channel quality reference information according to the configured transmission parameters; determining an activated precast beam of the terminal; and selecting the beam consistent with the activated prefabricated beam from the determined beam set as the beam for reporting the channel quality information. The embodiment of the application ensures the demodulation performance of the terminal, and further improves the network capacity.
Description
Technical Field
The present application relates to, but not limited to, wireless communication technologies, and more particularly, to a method and apparatus for processing channel quality information.
Background
With the continuous development of the fourth generation (4G) mobile communication system, the Massive MIMO (Massive MIMO) technology will become an important technology for increasing the network capacity.
In a Frequency Division Duplex (FDD) system, the Departure Angle (DOA) Of the uplink and downlink channels has reciprocity. In the Massive MIMO technology, a base station divides a cell into a plurality of prefabricated wave beams according to a DOA range to cover, and selects an activated prefabricated wave beam for a terminal from the divided prefabricated wave beams according to a certain strategy, so that the base station can send data to the terminal by activating the prefabricated wave beam. Terminals which activate the non-intersection of the prefabricated wave beams can spatially multiplex the same time-frequency resources, thereby improving the network capacity.
In FDD system, in the Massive MIMO technology strategy, since there are multiple pre-formed beams in a cell and a terminal has only one active pre-formed beam at a specific time, for example, for a user in Transmission Mode 9(TM9, Transmission Mode 9), a beam for a base station to transmit data to the terminal (i.e., the active pre-formed beam) may be different from a beam for transmitting a cell reference signal (e.g., multiple pre-formed beams in the cell), which may directly cause a downlink Channel quality, such as Channel State Information (CSI), estimated by the terminal to be mismatched with a Channel for actual data Transmission, thereby affecting the demodulation performance of the terminal.
Disclosure of Invention
The application provides a channel quality information processing method and device, which can ensure the demodulation performance of a terminal and further improve the network capacity.
The application provides a channel quality information processing method, which comprises the following steps:
determining a beam set periodically transmitted on the prefabricated beam by the channel quality reference information according to the configured transmission parameters;
determining an activated precast beam of the terminal;
and selecting the beam consistent with the activated prefabricated beam from the determined beam set as the beam for reporting the channel quality information.
The application also provides equipment for realizing the channel quality information processing, which comprises a processor and a memory; wherein the memory has stored thereon a computer program operable on the processor to: for performing the steps of any of the above-described methods for performing channel quality information processing.
The present application further provides an apparatus for implementing channel quality information processing, including: the device comprises a first determining module, a second determining module and a processing module; wherein,
a first determining module configured to determine a beam set periodically transmitted on the pre-formed beam by the channel quality reference information according to the configured transmission parameter;
a second determining module configured to determine an active pre-formed beam of the terminal;
and the processing module is configured to select a beam consistent with the activated pre-formed beam from the determined beam set as a beam for reporting the channel quality information.
The present application further provides a computer-readable storage medium storing computer-executable instructions for performing any one of the methods for processing channel quality information.
The technical scheme at least comprises the following steps: determining a beam set periodically transmitted on the prefabricated beam by the channel quality reference information according to the configured transmission parameters; determining an activated precast beam of the terminal; and selecting the beam consistent with the activated prefabricated beam from the determined beam set as the beam for reporting the channel quality information. The embodiment of the application ensures the demodulation performance of the terminal, and further improves the network capacity.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
Fig. 1 is a flowchart of a channel quality information processing method according to the present application;
fig. 2 is a schematic diagram of a configuration of a channel quality information processing apparatus according to the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
TM9 is a propagation mode defined in 3GPP Rel-10, and compared with the past, TM9 adds a new Channel State Information-Reference Signal (CSI-RS) responsible for user-level Channel measurement/feedback. Different users can have different CSI-RS configurations, and the Demodulation Reference signals (DMRS) of the user-level pilot frequency are combined to form beams aiming at the users together, so that the effect that the waves are moved along with the users is achieved. Meanwhile, the wave beam of the base station can be changed into a plurality of narrower user-level wave beams from one fat cell-level wave beam in the past, and irrelevant wave beams can form pairing to realize multi-user MIMO (MU-MIMO), so that the frequency spectrum resources are multiplexed, and the network capacity is improved.
However, if the beam for transmitting data to the terminal (i.e., the active pre-formed beam) and the beam for transmitting the cell reference signal (e.g., the plurality of pre-formed beams in the cell) may be different, the downlink channel quality, such as CSI, estimated by the terminal may not match the channel for actual data transmission, thereby affecting the demodulation performance of the terminal. According to the scheme for acquiring the channel quality information, the reference signal such as CSI-RS measured by the terminal such as the TM9 terminal can be kept consistent with the active precast beam of the terminal, so that accurate channel quality can be acquired, the demodulation performance of the terminal is guaranteed, and the network capacity is improved.
Fig. 1 is a flowchart of a channel quality information processing method according to the present application, as shown in fig. 1, including:
step 100: and determining a beam set of the channel quality reference information periodically transmitted on the pre-formed beam according to the configured transmission parameters.
The method also comprises the following steps:
and dividing the cell into a plurality of prefabricated wave beams according to the DOA range, wherein each prefabricated wave beam corresponds to one DOA range. The overlap between the pre-formed beams needs to be sufficiently small. The width of the DOA range covered by the precast beam is related to the number of antennas of the base station, and the more antennas of the base station, the narrower the width of the DOA range covered by the precast beam can be.
Optionally, the transmission parameters include, but are not limited to: a signaling period and an offset within the period.
Optionally, this step includes:
calculating the radio frame number (FrameNo) of the transmitted channel quality reference information according to the configured signal transmission period and the offset in the periodCSI-RS) And subframe number (SubFrameNo)CSI-RS)；
And determining the prefabricated wave beam corresponding to each channel quality reference information sending period in the wave beam set according to the prefabricated wave beam of the cell and the calculated wireless frame number and subframe number for sending the channel quality reference information. In this way, the channel quality reference information can be transmitted according to the preset beam period in the beam set in a rolling way.
Optionally, determining a pre-formed beam corresponding to each channel quality reference information transmission period in the beam set includes: determining a prefabricated beam BF corresponding to the transmitted channel quality reference information according to a preset periodic transmission strategyjSo that the channel quality reference information is periodically transmitted on the pre-formed beam.
The periodic transmission strategy is illustrated below with reference to an example.
Such as: the channel quality reference information and the number of the prefabricated wave beam are corresponding from small to large, and then the prefabricated wave beam BF corresponding to the channel quality reference information is sentjComprises the following steps:
when SubFrameNoCSI-RSWhen less than 5, BFj＝(FrameNoCSI-RS<<1)mod BFNUM；
When SubFrameNoCSI-RSWhen it is greater than or equal to 5, BFj＝((FrameNoCSI-RS<<1)+1)mod BFNUM(ii) a Where mod represents the modulo operation,<<indicating a shift to the left.
For another example: the channel quality reference information and the number of the prefabricated wave beam are corresponding from small to large, and then the prefabricated wave beam BF corresponding to the channel quality reference information is sentjComprises the following steps:
BFj＝(FrameNoCSI-RS/(ICSI-RS/10))mod BFNUM(ii) a Wherein, Mod represents a modulo operation.
The following steps are repeated: and corresponding the channel quality reference information to the prefabricated beams, wherein the corresponding relation is that the prefabricated beams with even numbers (in the order from small to large) are corresponding firstly, and then the prefabricated beams with odd numbers (in the order from small to large) are corresponding secondly. Thus, the pre-beam BF corresponding to the channel quality reference information is transmittedjComprises the following steps:
when SubFrameNoCSI-RSWhen less than 5, BFj＝((FrameNoCSI-RS<<1)mod BFNUM)*2；
When SubFrameNoCSI-RSWhen it is greater than or equal to 5, BFj＝(((FrameNoCSI-RS<<1)+1)mod BFNUM) 2+ 1; where mod represents the modulo operation,<<indicating a shift to the left.
The above example is not used to limit the implementation of the periodic transmission strategy, as long as the BF of the pre-beam corresponding to the transmission channel quality reference information is determined according to the preset periodic transmission strategyjIt is sufficient that the channel quality reference information is periodically transmitted on the pre-formed beam.
Optionally, in an FDD Massive MIMO scenario, the channel quality reference information is a CSI-RS signal.
Taking the channel quality reference information as CSI-RS as an example, the step specifically includes: transmitting period I according to configured CSI-RS signalsCSI-RSAnd an offset Δ in a periodCSI-RSCalculating a subframe number for transmitting the CSI-RS; and determining the prefabricated wave beam corresponding to each CIS-RS sending period according to the prefabricated wave beam of the cell and the calculated subframe number for sending the CSI-RS, wherein the prefabricated wave beams form a wave beam set. Therefore, the purpose that the cell CSI-RS signals are sent according to the traversing of the prefabricated wave beams in the wave velocity set can be achieved. That is to say, the base station sends the CSI-RS signals of the cell in a traversing manner on the pre-formed beams in the determined beam set, that is, sends the CSI-RS signals of the corresponding pre-formed beams periodically every CSI-RS sending period.
Step 101: and determining the active precast beam of the terminal.
Alternatively, the terminal may include, but is not limited to, a terminal such as TM 9.
Optionally, the determining the active pre-beam of the terminal in this step includes:
and estimating an uplink channel through a terminal such as a TM9 terminal uplink sounding signal, and selecting an active precast beam of the terminal from the precast beams according to a set activation strategy.
Optionally, since the DOAs of the uplink and downlink channels have reciprocity, the set activation policy may include, but is not limited to: and respectively calculating the projection energy of the uplink channel on each prefabricated beam, and taking the prefabricated beam corresponding to the maximum projection energy as the activated prefabricated beam of the terminal.
Alternatively, when there are multiple pre-formed beams corresponding to the maximum projection energy, one of the beams, for example, the beam with the small beam number, may be taken as the active pre-formed beam of the terminal.
It should be noted that, in the present application, there is no strict execution order between step 100 and step 101.
Step 102: and selecting the beam consistent with the activated prefabricated beam from the determined beam set as the beam for reporting the channel quality information.
And according to the activated prefabricated wave beam of the terminal, searching the wave beam which is used for sending the cell channel reference quality information and is the same as the activated prefabricated wave beam from the obtained wave beam set, and taking the searched wave beam as the wave beam for triggering the terminal to report the channel quality information, namely triggering the aperiodic channel quality information report of the terminal according to the prefabricated wave beam. At this time, the aperiodic channel quality information reported by the terminal is obtained by measurement and calculation according to the channel quality reference information signal of the same precast beam corresponding to the currently activated precast beam, so that the base station obtains accurate channel quality information for subsequent scheduling, and space division multiplexing of the beam domain of the terminal is realized, thereby improving the network capacity.
Optionally, if the reporting of the aperiodic Channel quality information of the terminal cannot be triggered due to insufficient resources of a Physical Downlink Control Channel (PDCCH), other reasons, or the like, the step of reporting is not executed when the triggering opportunity is discarded, and the reporting of the Channel quality reference information corresponding to the searched precast beam is triggered again.
Taking the CSI-RS as the channel quality information as an example, if the calculated CSI-RS delivery subframe cannot deliver the DCI0 format triggering the aperiodic CSI due to insufficient PDCCH resources or other reasons, the triggering opportunity is discarded, and the next CSI-RS signal corresponding to the precast beam is waited for, so as to ensure that the aperiodic CSI of the terminal must be measured by the CSI-RS channel of the precast beam corresponding to the terminal. Since the periodic CSI reported by the terminal is not necessarily a result of measuring the CSI-RS signal of the pre-formed beam corresponding to the terminal, the CSI reported aperiodically in the present application is used in the scheduling process.
In the embodiment of the application, the channel quality reference information of the cell, such as CSI-RS signals, is sent in a traversing mode according to the prefabricated wave beams, the channel quality reference information of the cell, such as the prefabricated wave beams of the CSI-RS signals, is matched, and the reporting of the aperiodic channel quality information, such as CSI, of the prefabricated wave beams corresponding to the terminal is triggered. By triggering the report of the channel quality information on the selected beam, it is ensured that a channel quality reference signal measured by a terminal, such as a TM9 terminal, such as a pre-formed beam where a CSI-RS is located is consistent with an activated pre-formed beam of the terminal itself, so that accurate channel quality is inevitably obtained, thereby ensuring demodulation performance of the terminal and further improving network capacity.
An embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, where the computer-executable instructions are used to execute any one of the above methods for implementing channel quality information processing.
The embodiment of the invention also provides equipment for realizing the channel quality information processing, which comprises a processor and a memory; wherein the memory has stored thereon a computer program operable on the processor to: for performing the steps of any of the above-described methods for performing channel quality information processing.
Fig. 2 is a schematic diagram of a structure of a channel quality information processing apparatus according to the present application, as shown in fig. 2, at least including: the device comprises a first determining module, a second determining module and a processing module; wherein,
a first determining module configured to determine a beam set periodically transmitted on the pre-formed beam by the channel quality reference information according to the configured transmission parameter;
a second determining module configured to determine an active pre-formed beam of the terminal;
and the processing module is configured to select a beam consistent with the activated pre-formed beam from the determined beam set as a beam for reporting the channel quality information.
Optionally, the apparatus of this application further includes: the preprocessing module is configured to uniformly divide the cell into a plurality of prefabricated beams according to the DOA range, and each prefabricated beam corresponds to one DOA range.
Optionally, the transmission parameters include, but are not limited to: a signaling period and an offset within the period.
Optionally, the first determining module is specifically configured to:
calculating the subframe number of the transmitted channel quality reference information according to the configured signal transmission period and the offset in the period; and determining the prefabricated wave beam corresponding to each channel quality erasing and disappearing information sending period in the wave beam set according to the prefabricated wave beam of the cell and the calculated subframe number for sending the channel quality reference information.
Optionally, in an FDD Massive MIMO scenario, the channel quality reference information is a CSI-RS signal.
Optionally, the second determining module is specifically configured to:
and estimating an uplink channel through the uplink detection signal of the terminal, and selecting the activated precast beam of the terminal from the precast beams according to the set strategy.
Optionally, since the DOAs of the uplink and downlink channels have reciprocity, the set policy may include, but is not limited to: and respectively calculating the projection energy of the uplink channel on each prefabricated beam, and taking the prefabricated beam corresponding to the maximum projection energy as the activated prefabricated beam of the terminal.
Alternatively, the terminal may include, but is not limited to, a terminal such as TM 9.
Optionally, the processing module is specifically configured to:
and according to the activated prefabricated wave beam of the terminal, searching the wave beam which is used for sending the cell channel quality information and is the same as the activated prefabricated wave beam from the obtained wave beam set, and taking the searched wave beam as the wave beam for reporting the channel quality information.
Optionally, if reporting of aperiodic Channel quality information of the terminal cannot be triggered due to insufficient resources of a Physical Downlink Control Channel (PDCCH) or other reasons, the processing module is further configured to: and discarding the trigger, namely not executing the reporting step, and triggering and reporting the channel quality information corresponding to the searched precast beam next time.
In the embodiment of the application, the channel quality reference information of the cell, such as CSI-RS signals, is sent in a traversing mode according to the prefabricated wave beams, the channel quality reference information of the cell, such as the prefabricated wave beams of the CSI-RS signals, is matched, and the reporting of the aperiodic channel quality information, such as CSI, of the prefabricated wave beams corresponding to the terminal is triggered. By triggering the report of the channel quality information on the selected beam, it is ensured that a channel quality reference signal measured by a terminal, such as a TM9 terminal, such as a pre-formed beam where a CSI-RS is located is consistent with an activated pre-formed beam of the terminal itself, so that accurate channel quality is inevitably obtained, thereby ensuring demodulation performance of the terminal and further improving network capacity.
In the following, an FDD Massive MIMO scenario is taken as an example to describe in detail the method for implementing channel quality information processing according to the present application.
In the first embodiment, it is assumed that the cell is divided into 7 pre-formed beam covers according to the DOA range, and the numbers are 0-6 respectively.
On one hand, a CSI-RS sending subframe is calculated according to the configured sending parameters for sending the CSI-RS, wherein the configuration parameters of the CSI-RS comprise: transmission period ICSI-RSAnd an offset Δ in a periodCSI-RS。
In the first embodiment, assume ICSI-RSThe value is 5, ΔCSI-RSTaking the value as 1, calculating to obtain: radio frame number (FrameNo)CSI-RS) Is 0, subframe number (SubFrameNo)CSI-RS) Transmitting CSI-RS signals when the number of the radio frame is 0, transmitting CSI-RS signals when the number of the radio frame is 6 next time, and repeating the steps in sequence every other ICSI-RSThe CSI-RS signal is transmitted periodically, e.g., 5 ms.
First embodiment, the number of Pre-Beam BFNUMThe number of the 7 beams is 0-6, in this embodiment, the CSI-RS signals are corresponding to the pre-formed beams in the order from small to large, and then the pre-formed beam BF corresponding to the CSI-RS is sentjComprises the following steps:
when SubFrameNoCSI-RSWhen less than 5, BFj＝(FrameNoCSI-RS<<1)mod BFNUM；
When SubFrameNoCSI-RSWhen it is greater than or equal to 5, BFj＝((FrameNoCSI-RS<<1)+1)mod BFNUM(ii) a Where mod represents the modulo operation,<<indicating a shift to the left.
According to the calculation method, when the frame number is 0 and the subframe number is 1, the number of the corresponding precast beam to be transmitted is 0; and when the frame number is 0 and the subframe number is 6, the number of the corresponding transmitted prefabricated beam is 1, and so on, and the CSI-RS signals corresponding to the cell prefabricated beams are transmitted in a circulating and rotating mode all the time.
On the other hand, according to the projection energy P of the terminal on each of the pre-beamsiAnd determining the active precast beam i of the terminal according to the following formula:
i＝max(P0，P1，...，PN) (1)
wherein i is 0-6; n is 6, max represents the maximum operation; in the first embodiment, let P be0、P1、P2、P3、P4、P5、P6Respectively 800, 12000, 600, 300, 200, 180, 100, then the active pre-beam number of the terminal is easily determined to be 1 according to equation (1).
And according to the determined activated prefabricated wave beam i of the terminal, namely the prefabricated wave beam with the number of 1, matching the prefabricated wave beam sent by the CSI-RS in each CSI-RS signal sending period, and triggering aperiodic CSI report of the terminal when the prefabricated wave beam sent by the CSI-RS is 1. In the first embodiment, the aperiodic CSI report of the terminal is triggered when the frame number is 0 and the subframe number is 6.
Therefore, the periodic CSI reported by the terminal is ensured to correspond to the measurement result of the pre-formed beam CSI-RS signal of the terminal, and the aperiodic CSI reported by the terminal obtained according to the method can be used for subsequent scheduling.
In the second embodiment, it is assumed that the cell is divided into 7 pre-formed beam covers according to the DOA range, and the numbers are 0-6 respectively.
On one hand, a CSI-RS sending subframe is calculated according to the configured sending parameters for sending the CSI-RS, wherein the configuration parameters of the CSI-RS comprise: transmission period ICSI-RSAnd an offset Δ in a periodCSI-RS。
In the second embodiment, assume ICSI-RSThe value is 10, ΔCSI-RSTaking the value as 2, calculating to obtain: transmitting the CSI-RS signal when the radio frame number is 0 and the subframe number is 2, transmitting the CSI-RS signal when the radio frame number is 1 next time and the subframe number is 2, and repeating the steps in the same way, wherein the steps are performed every other ICSI-RSThe CSI-RS signal is transmitted periodically, for example, 10 ms.
Second embodiment, the number of Pre-Beam BFNUMThe number of the beams is 7, the beams are numbered from 0 to 6, CSI-RS signals correspond to the prefabricated beams from small to large, and then the prefabricated beam BF corresponding to the CSI-RS is sentjComprises the following steps:
BFj＝(FrameNoCSI-RS/(ICSI-RS/10))mod BFNUM(ii) a Wherein, Mod represents a modulo operation.
According to the calculation method, when the frame number is 0 and the subframe number is 2, the number of the corresponding precast beam to be transmitted is 0; and when the frame number is 1 and the subframe number is 2, the number of the corresponding transmitted prefabricated beam is 1, and so on, and the CSI-RS signals corresponding to the cell prefabricated beams are transmitted in a circulating and rotating mode all the time.
On the other hand, according to the projection energy P of the terminal on each of the pre-beamsiAnd determining an active pre-beam i of the terminal according to the formula (1):
in the second embodiment, let P be0、P1、P2、P3、P4、P5、P6Is 12000, 600, 300, 200, 180, 100, then the active pre-beam number of the terminal is easily determined to be 0 according to equation (1). It should be noted that in this embodiment, the energy of two beams is the maximum value, and then, a beam with a small beam number may be taken as the active pre-formed beam of the terminal, which is the pre-formed beam with the number 0 in the second embodiment. It should be noted that, the number may be selected to be large, as long as one beam is used as the active pre-beam of the terminal, and the specific selection is not limited.
And according to the determined activated prefabricated wave beam i of the terminal, namely the prefabricated wave beam with the number of 0, matching the prefabricated wave beam sent by the CSI-RS in each CSI-RS signal sending period, and triggering aperiodic CSI report of the terminal when the prefabricated wave beam sent by the CSI-RS is 0. In a second embodiment, the aperiodic CSI report of the terminal is triggered when the frame number is 0 and the subframe number is 2.
Therefore, the periodic CSI reported by the terminal is ensured to correspond to the measurement result of the pre-formed beam CSI-RS signal of the terminal, and the aperiodic CSI reported by the terminal obtained according to the method can be used for subsequent scheduling.
In the third embodiment, it is assumed that the cell is divided into 11 pre-formed beam covers according to the DOA range, and the numbers are 0-10 respectively.
On one hand, a CSI-RS sending subframe is calculated according to the configured sending parameters for sending the CSI-RS, wherein the configuration parameters of the CSI-RS comprise: transmission period ICSI-RSAnd an offset Δ in a periodCSI-RS。
In the third embodiment, let ICSI-RSThe value is 5, ΔCSI-RSTaking the value as 1, calculating to obtain: when the radio frame number is 0 and the subframe number is 1, transmitting the CSI-RS signal, when the next CSI-RS signal is transmitted, the radio frame number is 0 and the subframe number is 6, repeating the steps, and repeating the steps every ICSI-RSThe CSI-RS signal is transmitted periodically, e.g., 5 ms.
Third embodiment, the number of Pre-Beam BFNUMThe CSI-RS signals are mapped to the pre-formed beams in the present embodiment, and the mapping relationship between the CSI-RS signals and the pre-formed beams is to map to all even-numbered pre-formed beams (in the order from small to large) and then to all odd-numbered pre-formed beams (in the order from small to large). Thus, the pre-beam BF corresponding to the CSI-RS is transmittedjComprises the following steps:
when SubFrameNoCSI-RSWhen less than 5, BFj＝((FrameNoCSI-RS<<1)mod BFNUM)*2；
When SubFrameNoCSI-RSWhen it is greater than or equal to 5, BFj＝(((FrameNoCSI-RS<<1)+1)mod BFNUM) 2+ 1; where mod represents the modulo operation,<<indicating a shift to the left.
According to the calculation method, when the frame number is 0 and the subframe number is 1, the number of the corresponding precast beam to be transmitted is 0; and when the frame number is 0 and the subframe number is 6, the number of the corresponding transmitted prefabricated beam is 1, and so on, and the CSI-RS signals corresponding to the cell prefabricated beams are transmitted in a circulating and rotating mode all the time.
On the other hand, according to the projection energy P of the terminal on each of the pre-beamsiAnd determining an active pre-beam i of the terminal according to the formula (1):
in the second embodiment, let P be0、P1、P2、P3、P4、P5、P6Respectively 2000, 600, 300, 200, 10080, 100, 300, 200, 1280, 500, then the active pre-beam number of the terminal is easily determined to be 5 according to equation (1).
And according to the determined activated prefabricated beam i of the terminal, namely the prefabricated beam with the number of 5, matching the prefabricated beam sent by the CSI-RS in each CSI-RS signal sending period, and triggering aperiodic CSI report of the terminal when the prefabricated beam sent by the CSI-RS is 5. In the third embodiment, when the frame number is 4 and the subframe number is 1, aperiodic CSI reporting of the terminal is triggered.
Therefore, the periodic CSI reported by the terminal is ensured to correspond to the measurement result of the pre-formed beam CSI-RS signal of the terminal, and the aperiodic CSI reported by the terminal obtained according to the method can be used for subsequent scheduling.
In the fourth embodiment, it is assumed that the cell is divided into 11 pre-formed beam covers according to the DOA range, and the numbers are 0-10 respectively.
On one hand, a CSI-RS sending subframe is calculated according to the configured sending parameters for sending the CSI-RS, wherein the configuration parameters of the CSI-RS comprise: transmission period ICSI-RSAnd an offset Δ in a periodCSI-RS。
In the fourth embodiment, let ICSI-RSThe value is 10, ΔCSI-RSWhen the value is 2, calculating to obtain: transmitting the CSI-RS signal when the radio frame number is 0 and the subframe number is 2, transmitting the CSI-RS signal when the radio frame number is 1 next time and the subframe number is 2, and repeating the steps in the same way, wherein the steps are performed every other ICSI-RSThe CSI-RS signal is transmitted periodically, for example, 10 ms.
Third embodiment, the number of Pre-Beam BFNUMThe number of the beam is 11, and is 0-10, in this embodiment, the CSI-RS signals are corresponding to the pre-formed beams in the order from small to large, and then the pre-formed beam BF corresponding to the CSI-RS is sentjComprises the following steps:
BFj＝(FrameNoCSI-RS/(ICSI-RS/10))mod BFNUM(ii) a Wherein, Mod represents a modulo operation.
According to the calculation method, when the frame number is 0 and the subframe number is 2, the number of the corresponding precast beam to be transmitted is 0; and when the frame number is 1 and the subframe number is 2, the number of the corresponding transmitted prefabricated beam is 1, and so on, and the CSI-RS signals corresponding to the cell prefabricated beams are transmitted in a circulating and rotating mode all the time.
On the other hand, according to the projection energy P of the terminal on each of the pre-beamsiAnd determining an active pre-beam i of the terminal according to the formula (1):
in the fourth embodiment, let P be0、P1、P2、P3、P4、P5、P6Respectively 2000, 600, 300, 200, 1080, 100, 300, 200, 12800, 500, the active pre-beam number of the terminal is easily determined to be 9 according to equation (1).
And according to the determined activated prefabricated beam i of the terminal, namely the prefabricated beam with the number of 9, matching the prefabricated beam sent by the CSI-RS in each CSI-RS signal sending period, and triggering aperiodic CSI report of the terminal when the prefabricated beam sent by the CSI-RS is 9. In the second embodiment, the aperiodic CSI report of the terminal is triggered when the frame number is 9 and the subframe number is 2.
However, in this embodiment, if a DCI triggering resource is not allocated when a resource is allocated due to a low priority ratio of the terminal in scheduling, and an aperiodic CSI report cannot be triggered, then according to the embodiment of the present application, the aperiodic CSI report of the terminal is not triggered at this time, and waiting for ICSI-RS*BFNUMAnd after each subframe, when the number of the prefabricated wave beam sent by the CSI-RS is 9 again, triggering the aperiodic CSI report of the terminal.
Therefore, the periodic CSI reported by the terminal is ensured to correspond to the measurement result of the pre-formed beam CSI-RS signal of the terminal, and the aperiodic CSI reported by the terminal obtained according to the method can be used for subsequent scheduling.
The above description is only a preferred example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method of processing channel quality information, comprising:
determining a beam set periodically transmitted on the prefabricated beam by the channel quality reference information according to the configured transmission parameters;
determining an activated precast beam of the terminal;
and searching a beam identical to the activated prefabricated beam from the beam set according to the activated prefabricated beam of the terminal, and triggering the terminal to report the channel quality information corresponding to the channel quality reference information when the prefabricated beam for sending the channel quality reference information is the searched beam.
2. The channel quality information processing method according to claim 1, wherein the transmission parameter includes: a signal transmission period and an offset within the period;
the determining the beam set of the channel quality reference information periodically transmitted on the pre-formed beam comprises:
calculating the radio frame number and the subframe number of the transmitted channel quality reference information according to the configured signal transmission period and the offset in the period;
and determining the prefabricated wave beam corresponding to each channel quality reference information sending period in the wave beam set according to the prefabricated wave beam and the calculated wireless frame number and subframe number for sending the channel quality reference information.
3. The channel quality information processing method according to claim 2, wherein the determining the pre-formed beam corresponding to each channel quality reference information transmission period in the beam set comprises:
determining a pre-formed beam corresponding to the channel quality reference information according to a preset periodic transmission strategy，So that the channel quality reference information is periodically transmitted on the pre-formed beam.
4. The channel quality information processing method according to claim 1, wherein the determining of the active pre-beam for the terminal comprises:
and estimating an uplink channel through the uplink detection signal of the terminal, and selecting an activated precast beam of the terminal from the precast beams according to a set activation strategy.
5. The channel quality information processing method according to claim 4, wherein the activation policy includes: and respectively calculating the projection energy of the uplink channel on each prefabricated beam, and taking the prefabricated beam corresponding to the maximum projection energy as the activated prefabricated beam of the terminal.
6. The method of claim 1, wherein if the channel quality information cannot be reported, the method further comprises:
and not executing the reporting step, waiting for finding the beam in the beam set which is the same as the activated prefabricated beam next time, and reporting the channel quality information.
7. An apparatus for implementing channel quality information processing includes a processor, a memory; wherein the memory has stored thereon a computer program operable on the processor to: steps for performing the method of any one of claims 1 to 6 for enabling channel quality information processing.
8. An apparatus for implementing channel quality information processing, comprising: the device comprises a first determining module, a second determining module and a processing module; wherein,
a first determining module configured to determine a beam set periodically transmitted on the pre-formed beam by the channel quality reference information according to the configured transmission parameter;
a second determining module configured to determine an active pre-formed beam of the terminal;
and the processing module is configured to search a beam identical to the activated pre-formed beam from the beam set according to the activated pre-formed beam of the terminal, and trigger the terminal to report the channel quality information corresponding to the channel quality reference information when the pre-formed beam for sending the channel quality reference information is the searched beam.
9. A computer-readable storage medium storing computer-executable instructions for performing the method of implementing channel quality information processing of any one of claims 1 to 6.
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| CN106921423A (en) * | 2015-12-28 | 2017-07-04 | 电信科学技术研究院 | A kind of method and apparatus for determining analog beam |
| CN108111267A (en) * | 2017-05-05 | 2018-06-01 | 中兴通讯股份有限公司 | The transmission method and system of signal and the sending method and device of control information |
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| US9264206B2 (en) * | 2012-10-30 | 2016-02-16 | Lg Electronics Inc. | Signal transmission and reception method using random beamforming in wireless communication system and apparatus therefor |
| WO2016045695A1 (en) * | 2014-09-23 | 2016-03-31 | Telefonaktiebolaget L M Ericsson (Publ) | Triggering pilot transmission for mobility measurements |
| KR102346981B1 (en) * | 2014-11-28 | 2022-01-04 | 삼성전자주식회사 | Method and apparatus for estimating channel in a wireless communictaion system |
| CN105790913B (en) * | 2014-12-26 | 2019-01-22 | 上海无线通信研究中心 | The selection and distribution method of ascending pilot frequency in fdd mode massive-MIMO system |
| US10700752B2 (en) * | 2016-01-14 | 2020-06-30 | Samsung Electronics Co., Ltd. | System, method, and apparatus of beam-tracking and beam feedback operation in a beam-forming based system |
| US10243642B2 (en) * | 2016-04-22 | 2019-03-26 | Lg Electronics Inc. | Method and base station for receiving system information, and method and user equipment for transmitting system information |
| CN107889230B (en) * | 2016-09-29 | 2022-11-29 | 中兴通讯股份有限公司 | Signal transmitting, receiving and transmitting device |
| US11265880B2 (en) * | 2016-11-03 | 2022-03-01 | Qualcomm Incorporated | Beam sets for cell and beam mobility |
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| CN106921423A (en) * | 2015-12-28 | 2017-07-04 | 电信科学技术研究院 | A kind of method and apparatus for determining analog beam |
| CN108111267A (en) * | 2017-05-05 | 2018-06-01 | 中兴通讯股份有限公司 | The transmission method and system of signal and the sending method and device of control information |
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