CN108631911B - Periodic subband reporting method and device - Google Patents

Periodic subband reporting method and device Download PDF

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CN108631911B
CN108631911B CN201710178002.3A CN201710178002A CN108631911B CN 108631911 B CN108631911 B CN 108631911B CN 201710178002 A CN201710178002 A CN 201710178002A CN 108631911 B CN108631911 B CN 108631911B
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band
sub
reporting
reported
terminal
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CN108631911A (en
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张德坤
姚春峰
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication

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

Abstract

The invention relates to a periodic sub-band reporting method, which comprises the steps of determining a sub-band reporting mode of a partial bandwidth corresponding to a terminal according to a received current service type corresponding to the terminal, and determining a sub-band reporting sequence corresponding to the sub-band reporting mode; and configuring the power parameter of the current sub-band to be reported corresponding to each partial bandwidth of the current sub-band reporting period as the unique maximum power parameter according to the sub-band reporting sequence. The base station determines the current sub-band to be reported corresponding to the current sub-band reporting period according to the sub-band reporting sequence, and the current sub-band to be reported is the sub-band with the maximum power through power configuration, so that the subsequent terminal can report the sub-band periodically, and the system performance can be improved. A device for reporting the periodic sub-band is also provided.

Description

Periodic subband reporting method and device
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a periodic subband reporting method and apparatus.
Background
In an LTE (Long Term Evolution) system, in order to better adapt to changes of a radio Channel, a UE (User Equipment) reports downlink Channel quality to a base station by reporting CSI (Channel State Information), so that the base station configures a more reliable MCS (Modulation and Coding Scheme) for the UE.
In the LTE protocol, the periodic CSI reporting mode and the aperiodic CSI reporting mode are included, where the aperiodic CSI reporting mode can implement reporting of CQI (Channel Quality Indicator) and PMI (Precoding Matrix Indicator) of all subbands, but the aperiodic CSI reporting mode can only be triggered in a specific scenario, and the periodic CSI reporting mode cannot implement complete subband reporting, so that downlink Channel Quality cannot be completely fed back, resulting in system performance degradation.
Disclosure of Invention
Therefore, it is necessary to provide a method and an apparatus for periodic subband reporting, which can implement periodic subband reporting of UE by using power control of a base station side, so as to improve system performance by feeding back downlink channel quality to the base station completely through all subbands.
A method of periodic subband reporting, the method comprising:
determining a sub-band reporting mode of a part of bandwidth corresponding to a terminal according to a received current service type corresponding to the terminal, and determining a sub-band reporting sequence corresponding to the sub-band reporting mode;
determining a current sub-band to be reported corresponding to each partial bandwidth of a current sub-band reporting period according to the sub-band reporting sequence;
and configuring the power parameter corresponding to the current sub-band to be reported corresponding to each partial bandwidth as a unique maximum power parameter.
A periodic subband reporting device, the device comprising:
a sub-band reporting sequence determining module, configured to determine, according to a received current service type corresponding to a terminal, a sub-band reporting mode of a partial bandwidth corresponding to the terminal, and determine a sub-band reporting sequence corresponding to the sub-band reporting mode;
a current reporting sub-band obtaining module, configured to determine, according to the sub-band reporting sequence, a current sub-band to be reported corresponding to each partial bandwidth in a current sub-band reporting period;
and the sub-band power control module configures the power parameter corresponding to the current sub-band to be reported corresponding to each partial bandwidth as the unique maximum power parameter.
According to the periodic sub-band reporting method and the device, the service type corresponding to the terminal at present is obtained through the information reported by the receiving terminal, so that the sub-band reporting mode of partial bandwidth corresponding to the terminal is determined according to the service type of the terminal, the sub-band reporting sequence corresponding to the sub-band reporting mode is obtained, furthermore, in each sub-band reporting period, the base station determines the sub-band to be reported at present corresponding to each partial bandwidth of the current reporting period according to the sub-band reporting sequence, the maximum power parameter is configured for the sub-band to be reported at present, the configuration power parameters corresponding to other sub-bands except the sub-band to be reported at present in one partial bandwidth are smaller than the maximum power parameter, and the maximum power of the sub-band to be reported at present corresponding to the sub-band reporting period is ensured. The terminal can report the sub-band information periodically according to the sub-band reporting sequence through the power control of the base station, so that the base station can completely feed back the quality of the downlink channel to the base station through all sub-bands, the base station is favorable for distributing proper frequency domain resources to the terminal according to the fed-back quality of the downlink channel, and the system performance is improved.
Drawings
FIG. 1 is a flow diagram of a method for periodic subband reporting in one embodiment;
fig. 2A is a schematic diagram of a periodic relationship corresponding to a periodic CSI reporting mode in an embodiment;
fig. 2B is a schematic diagram illustrating a periodic relationship corresponding to a periodic subband CSI reporting mode in an embodiment;
FIG. 3 is a flowchart illustrating a method for periodic subband reporting according to another embodiment;
FIG. 4 is a flowchart of a method for periodic sequential subband reporting in an embodiment;
FIG. 5 is a schematic diagram of sequential subband reporting in FIG. 4;
fig. 6 is a flowchart of a periodic cross subband reporting method according to an embodiment;
fig. 7 is a schematic diagram of reporting of the corresponding cross subband in fig. 6;
fig. 8 is a schematic structural diagram of a periodic subband reporting apparatus in an embodiment;
fig. 9 is a schematic structural diagram of a periodic subband reporting apparatus in another embodiment;
fig. 10 is a schematic structural diagram of a periodic subband reporting apparatus in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, in one embodiment, a periodic subband reporting method is provided, comprising:
step S110, determining a sub-band reporting mode of a part of bandwidth corresponding to the terminal according to the received current service type corresponding to the terminal, and determining a sub-band reporting sequence corresponding to the sub-band reporting mode.
Specifically, the current Service Type of the terminal is mainly distinguished according to a Service Type in a Service request message, where the Service Type mainly includes: signaling, data, paging Response and Broadcast Service Reception, with time efficiency sequentially from high to low. The terminal here includes a user equipment UE.
In the LTE technology field, according to the specification of the LTE protocol, the number of partial bandwidths (Bandwidth Parts) corresponding to a wideband can be determined from the wideband (Wide Band) allocated to a terminal by the system, and further, the number of corresponding subbands (SubBand) can be determined from the number of partial bandwidths. The sub-band reporting means that sub-bands in a partial bandwidth are reported, and the different reporting sequences of the sub-bands affect the timeliness of the terminal service, so that the sub-band reporting modes of the partial bandwidth corresponding to the terminal are determined according to the timeliness of the current service type corresponding to the terminal, the sub-band reporting modes include a sequential reporting mode and a cross reporting mode, different sub-band reporting modes correspond to different sub-band reporting sequences, the sub-band reporting sequence refers to the sub-band reporting sequence corresponding to each partial bandwidth, and the sub-band reporting sequences of each partial bandwidth are the same.
And step S120, determining the current sub-band to be reported corresponding to each part of bandwidth in the current sub-band reporting period according to the sub-band reporting sequence.
Specifically, the terminal reports the sub-bands periodically according to the sub-band reporting order, and the sub-band reporting period is a period in which all the partial bandwidths corresponding to the terminal bandwidth report one corresponding sub-band respectively. And the base station respectively determines the sub-band of each partial bandwidth corresponding to the current reporting period as the current sub-band to be reported according to the sub-band reporting sequence.
Step S130, configuring the power parameter corresponding to the current sub-band to be reported corresponding to each partial bandwidth as a unique maximum power parameter.
Specifically, the base station performs power control on the sub-band in each partial bandwidth, sets the power configuration parameter corresponding to the current sub-band to be reported as a maximum power parameter, and simultaneously sets the power configuration parameters except the power configuration parameter corresponding to the current sub-band to be reported smaller than the maximum power parameter, thereby ensuring that the power of the current sub-band to be reported in each partial bandwidth determined by the base station according to the sub-band reporting sequence is maximum.
Further, after the base station configures the sub-band power, the terminal acquires the corresponding sub-band according to a preset sub-band reporting rule, and reports the channel state information corresponding to the sub-band. If the preset sub-band reporting rule corresponding to the terminal is a rule for setting the terminal sub-band reporting rule to be maximum throughput in advance through an algorithm and a related LTE protocol, the maximum throughput refers to the data volume successfully transmitted in a unit time of the system, and the unit is bit per second. Since the maximum throughput depends on the SINR (Signal to Interference plus Noise Ratio), while the SINR calculation is related to the power, and the power is controlled by the power parameter, when the subband reporting rule preset by the terminal is the maximum throughput rule, the subband obtained by the terminal is the subband corresponding to the current maximum power parameter. Therefore, when the base station makes the power parameter corresponding to the current subband to be reported maximum by configuring the subband power parameter, the subband obtained by the terminal according to the preset maximum throughput rule is the current subband to be reported determined by the base station according to the subband reporting sequence, and the information state information CSI corresponding to the subband is reported at the same time. In the field of wireless communication, the CSI is a channel attribute of a communication link, and describes a fading factor of a signal on each transmission path, that is, a value of each element in a channel gain matrix H, such as signal Scattering (Scattering), fading or fading of environment, power fading (power fading) and other information.
Furthermore, the sub-band reporting is a periodic process, the base station acquires the sub-band to be reported corresponding to each partial bandwidth in different sub-band reporting periods according to the sub-band reporting sequence, and enables the terminal to report the corresponding sub-band CSI in a power control mode, so that the periodic reporting of the sub-band is realized.
The periodic sub-band reporting method comprises the steps of obtaining a service type corresponding to a terminal at present by receiving information reported by the terminal, determining a sub-band reporting mode of a partial bandwidth corresponding to the terminal according to the service type of the terminal, obtaining a sub-band reporting sequence corresponding to the sub-band reporting mode, further, in each sub-band reporting period, determining a sub-band to be reported at present corresponding to each partial bandwidth of the current reporting period by a base station according to the sub-band reporting sequence, configuring a maximum power parameter for the sub-band to be reported at present, and ensuring that the power of the sub-band to be reported at present is maximum by the base station according to the maximum power parameter corresponding to other sub-bands except the sub-band to be reported at present in one partial bandwidth. The terminal can report the sub-band information periodically according to the sub-band reporting sequence through the power control of the base station, so that the base station can completely feed back the quality of the downlink channel to the base station through all sub-bands, the base station is favorable for distributing proper frequency domain resources to the terminal according to the fed-back quality of the downlink channel, and the system performance is improved.
In one embodiment, the sub-band reporting mode is a sequential reporting mode; step S120 includes:
and if the current sub-band reporting period is the nth sub-band reporting period, determining the nth sub-band corresponding to each partial bandwidth as the current sub-band to be reported according to the sequential reporting mode, wherein N is an integer which is less than or equal to the maximum sub-band number corresponding to the partial bandwidth and is not zero.
Specifically, when the current service type reported by the terminal is judged to be a service type with lower timeliness, the sub-band reporting mode is selected as a sequential reporting mode, and the sub-band reporting sequence corresponding to the sequential reporting mode is that sub-bands are reported sequentially according to the arrangement sequence of the sub-bands in the partial bandwidth. And if the current sub-band reporting period is the nth sub-band reporting period, wherein N represents that the sub-band corresponding to the nth acquired partial bandwidth is reported, the sub-band corresponding to the nth acquired partial bandwidth is the nth sub-band according to the sequential reporting sequence, the nth sub-band is taken as the current reporting sub-band and is configured as the maximum power parameter, wherein N is an integer and is less than or equal to the number of the corresponding sub-bands in the partial bandwidth.
For example, the terminal frequency domain resources include a number k of fractional bandwidths, respectively, a first fractional bandwidth BP1, a second fractional bandwidth BP2, … …, a k-th fractional bandwidth BPk, wherein each fractional bandwidth includes n subbands, respectively, a first subband SB1, a second subband SB2, … …, an n-th subband SBn.
According to a periodic sequential reporting mode, if a current sub-band reporting period is a first sub-band reporting period, respectively determining SB1 corresponding to BP1, SB1, … … corresponding to BP2, and a first sub-band SB1 corresponding to BPk as a current sub-band to be reported corresponding to each partial bandwidth, respectively configuring power parameters corresponding to first sub-bands SB1 corresponding to BP1, BP2, … …, and BP4 as 1, and configuring power parameters corresponding to the remaining sub-bands as 1/2, so that the terminal selects the first sub-band corresponding to each partial bandwidth for reporting in the first sub-band reporting period.
Further, if the current sub-band reporting period is the second sub-band reporting period, the second sub-band SB2 corresponding to BP1, BP2, … …, and BPk is the current sub-band to be reported corresponding to each partial bandwidth, the power configuration parameters corresponding to the second sub-band SB2 corresponding to BP1, BP2, … …, and BPk are configured to be 1, and the power parameters corresponding to the remaining sub-bands are configured to be 1/2, so that the terminal selects the second sub-band corresponding to each partial bandwidth for reporting in the second sub-band reporting period. And repeating the steps until power parameters corresponding to the nth sub-band SB4 corresponding to the BP1, the BP2, the BP … … and the BPk are respectively configured to be 1 in the reporting period of the nth sub-band, and power parameters corresponding to the rest sub-bands are configured to be 1/2, so that the terminal selects the nth sub-band corresponding to each partial bandwidth in the reporting period of the nth sub-band to report, and thus the periodic reporting process of the sub-band is completed.
In the embodiment, when the current service type of the terminal is a low-timeliness service type, the sequential reporting mode is selected to report the sub-band, the complexity of the sub-band reporting mode is low, and the configuration cost of the base station is saved.
In one embodiment, the sub-band reporting mode is a cross reporting mode; step 120 includes:
and if the current sub-band reporting period is the nth sub-band reporting period, determining the nth reported sub-band corresponding to each partial bandwidth as the current sub-band to be reported according to a preset reporting rule corresponding to the cross reporting mode, wherein N is an integer which is less than or equal to the maximum sub-band number corresponding to the partial bandwidth and is not zero.
In this embodiment, specifically, when the current service type reported by the terminal is determined to be a service type with higher timeliness, the sub-band reporting mode is selected as a cross reporting mode, and a sub-band reporting sequence corresponding to the cross reporting mode is to report according to a preset sub-band reporting sequence corresponding to the current service type. And if the current sub-band reporting period is the nth sub-band reporting period, wherein N represents that the sub-band corresponding to the nth acquired partial bandwidth is reported, according to a preset sub-band reporting sequence, the sub-band corresponding to the nth acquired partial bandwidth is the preset sub-band reporting sequence corresponding to the nth sub-band, wherein N is an integer and is less than or equal to the number of the corresponding sub-bands in the partial bandwidth.
Further, for example, the terminal frequency domain resource includes a number k of fractional bandwidths, respectively, a first fractional bandwidth BP1, a second fractional bandwidth BP2, … …, and a k-th fractional bandwidth BPk, where each fractional bandwidth includes n subbands, respectively, a first subband SB1, a second subband SB2, … …, and an n-th subband SBn. When n is an odd number, the reporting sequence of each partial bandwidth preset sub-band is SB1, SB3, SB2, SB4, SB5 … …, SBn and SBn-1; and when n is an even number, presetting the sub-band reporting sequence of SB1, SB3, SB2, SB4, SB5 … … and SBn for each partial bandwidth.
According to a preset sub-band reporting sequence, if the current sub-band reporting period is a first sub-band reporting period, respectively determining SB1 corresponding to BP1, SB1, … … corresponding to BP2, and a first sub-band SB1 corresponding to BPk as the current sub-band to be reported corresponding to each partial bandwidth, respectively configuring the power parameter corresponding to the first sub-band SB1 corresponding to BP1, BP2, … …, and BPk as 1, and configuring the power parameter corresponding to the rest sub-bands as 1/2, so that the terminal selects the first sub-band corresponding to each partial bandwidth for reporting in the first sub-band reporting period. Further, if the current sub-band reporting period is the second sub-band reporting period, the third sub-bands SB3 corresponding to the BPs 1, the BPs 2, the … …, and the BPk are respectively the current sub-bands to be reported corresponding to each partial bandwidth according to the preset sub-band reporting sequence, the power configuration parameters corresponding to the third sub-bands SB3 corresponding to the BPs 1, the BPs 2, the … …, and the BPk are respectively configured to be 1, and the power parameters corresponding to the remaining sub-bands are configured to be 1/2, so that the terminal selects the third sub-band corresponding to each partial bandwidth in the second sub-band reporting period for reporting.
And analogizing in sequence, performing subband reporting according to a preset subband reporting sequence until power parameters corresponding to an nth subband or an nth-1 subband SBn corresponding to BP1, BP2, BP … … and BPk are configured to be 1 and power parameters corresponding to other subbands are configured to be 1/2 respectively in an nth or n-1 subband reporting period, so that the terminal selects the nth subband or the nth-1 subband corresponding to each partial bandwidth in the nth or n-1 subband reporting period to perform reporting, thereby completing the periodic reporting process of the subbands, wherein finally reporting the nth subband or the nth-1 subband is related to the total number of the subbands, and according to the preset subband reporting sequence, when n is an odd number, the finally reported subband is the nth-1 subband, and when n is an even number, the finally reported subband is the nth subband.
In this embodiment, the preset subband reporting sequence may be set by the user according to the needs of the user or may be preset according to the terminal service type, so that the timeliness is improved by implementing cross reporting, which is not specifically limited herein. In this embodiment, when the current service type of the terminal is a high timeliness service type, subband cross reporting is performed according to a preset subband reporting sequence, and time delay between subbands can be offset through subband cross reporting, so that timeliness of a terminal service is improved.
In one embodiment, the periodic subband reporting method further comprises:
the method comprises the steps that a receiving terminal periodically reports a Precoding Matrix Indication (PMI) corresponding to a broadband according to a preset broadband reporting mode, and triggers Precoding Type Indication (PTI) enabling when detecting that a first codebook sequence number reported by the terminal does not change in an adjacent period according to a first codebook sequence number obtained by the PMI, so that the terminal can report CSI corresponding to a subband after reporting a second codebook sequence number obtained by the broadband according to the PMI.
In this embodiment, according to the LTE protocol, a periodic mode supporting subband reporting is preconfigured as a mode for reporting CSI by the terminal, such as mode 2-1. The method comprises the steps that a terminal periodically reports a first codebook sequence number corresponding to a terminal bandwidth according to a preset CSI reporting mode, a base station detects the first codebook sequence number reported by the terminal, according to an LTE protocol, when the fact that the first codebook sequence number does not change in two adjacent periods in the periodic reporting process of the first codebook sequence number is detected, a Precoding Type Indicator (PTI) can be triggered to enable, namely, the PTI is triggered to be 1, when the PTI is triggered to be 1, according to the LTE protocol, the terminal reports a sub-band, firstly the terminal reports a second codebook sequence number corresponding to a broadband, and then CSI corresponding to the sub-band is reported, wherein the sub-band CSI comprises a sub-band PMI and a sub-band CQI.
Referring to fig. 2A, according to the CSI reporting mode configured in advance as mode2-1, when the PTI is equal to 0, the terminal reports an RI (Rank Indication) and a PTI in a first reporting period, and reports a PMI of a bandwidth and a first codebook number W1 at least once in an RI feedback period, and reports a wideband second codebook number W2 and a CQI (Channel Quality Indicator) at least once in a feedback period of the first codebook number W1, that is, when the PTI is equal to 0, the terminal reports the wideband first codebook number W1 and the second codebook number W2, Np indicates a feedback period of the wideband second codebook number W2, H0 Np indicates a feedback period of the wideband first codebook number W1, and M0 Np indicates a feedback period of the wideband first codebook number W1, where M is equal to 0RI*H1Np is the wideband RI feedback period.
As shown in fig. 2B, when it is detected that the first codebook sequence number W1 is unchanged in the adjacent period, the PTI is triggered to be 1, RI and PTI are reported, the bandwidth second codebook sequence number W2 and CQI are reported in the RI feedback period, and the sub-codebook is reported in the second codebook sequence number W2 feedback periodWith a second codebook index W2 and a CQI, the subband CQI belongs to one of the subband CSIs. Np denotes the feedback period of the subband second codebook index W2, H1Np denotes the feedback period of the wideband second codebook index W2, MRI*H1Np is the wideband RI feedback period.
In the embodiment, the periodic reporting protocol capable of supporting sub-band reporting is configured by using the LTE protocol, and the periodic reporting of all sub-bands is realized on the basis of the periodic reporting mode of the LTE protocol according to the triggering condition of the sub-band reporting configured by the protocol, so that the channel state information is fed back better. In addition, after the second code book serial number W2 of the bandwidth is reported, the sub-band CSI is reported, so that a measurement channel result can be reported with high precision, and a terminal scheduling part of frequency domain resources can better transmit services.
As shown in fig. 3, in one embodiment, the method further comprises:
step S140, acquiring a Precoding Matrix Indicator (PMI) and a Channel Quality Indicator (CQI) corresponding to each current sub-band according to the CSI corresponding to the sub-band periodically reported by the terminal, and allocating a corresponding Modulation and Coding Strategy (MCS) and frequency domain resources to the terminal according to the PMI and the CQI.
In this embodiment, a terminal periodically reports CSI corresponding to a sub-band, updates the CSI corresponding to the currently reported sub-band after reporting the CSI corresponding to the currently reported sub-band in a reporting period of the current sub-band, where the CSI mainly refers to a sub-band PMI and a CQI, obtains a current PMI corresponding to the currently reported sub-band, updates CSI corresponding to other sub-bands by using a forward-backward interpolation method, obtains an updated PMI, and evaluates channel quality and a sub-band codebook sequence number by combining a wideband CQI and a sub-band CQI, configures reasonable MCS and frequency domain resources for a corresponding terminal, and reports a codebook sequence number corresponding to more accurate precoding.
In the embodiment, the base station evaluates the channel according to the received sub-band CSI information reported by the terminal, so that reasonable MCS and frequency domain resources are configured for the terminal channel, the system performance is improved, and more accurate codebook sequence numbers corresponding to precoding are provided, so that the interference of other users to a target user can be reduced.
As shown in fig. 4 in conjunction with fig. 5, in an embodiment, a method for reporting sub-bands periodically in sequence is provided, which includes the following steps:
and step S410, acquiring CSI reported by the terminal according to a preset broadband mode, wherein the CSI comprises a broadband PMI and a broadband first codebook serial number.
Specifically, the base station configures the terminal reporting mode to be a broadband mode2-1 and configures the broadband mode2-1 to be a mode supporting subband transmission with universality according to the LTE protocol. The terminal carries out periodic measurement and report on the bandwidth CSI according to a periodic reporting mode configured by a base station through high-level configuration signaling, wherein the CSI comprises a bandwidth PMI and a first codebook serial number of the bandwidth, the codebook is used for reflecting the channel capacity of a system, the codebook is jointly determined by the first codebook serial number and the second codebook serial number, and the first codebook serial number represents one characteristic of the codebook.
Step S420, when it is detected that the serial number of the wideband first codebook does not change in the adjacent period, triggering the precoding type indication PTI to enable.
Specifically, when detecting that the serial number of the first wideband codebook does not change in an adjacent period according to the CSI periodically reported by the terminal, triggering the precoding type indication PTI enable according to the LTE protocol, where PTI is 1, and when PTI is 1, the terminal can report the subband.
Step S430, selecting a sub-band reporting mode with partial bandwidth as a sequential reporting mode according to the received current service type corresponding to the terminal, and determining a sub-band reporting sequence corresponding to the sequential reporting mode.
Specifically, according to the LTE protocol, different bandwidths correspond to different numbers of partial bandwidths, different numbers of partial bandwidths correspond to different numbers of subbands, and the base station obtains the number of subbands corresponding to the terminal according to the LTE protocol based on the bandwidth allocated to the terminal. The sub-band reporting sequence corresponding to the sequential reporting mode is to report the adjacent sub-bands in sequence. And if the first sub-band is reported in the first sub-band reporting period, reporting the second sub-band in the second sub-band reporting period, and repeating the steps in sequence until all sub-bands are reported in each partial bandwidth.
Further, the base station determines the current service type of the terminal according to the terminal type information in the measurement information reported by the terminal, and selects a sequential reporting mode to periodically report the sub-bands when detecting that the terminal service type is a low-timeliness service type, as shown in fig. 5, a sub-band reporting sequence corresponding to the sub-band sequential reporting mode is provided. And each partial bandwidth reports the sub-bands according to SBi, SBj and SBk … in different sub-band reporting periods respectively, wherein the SBi, the SBj and the SBk are adjacent sub-bands. In the same sub-band reporting period, each partial bandwidth reports the same sub-band, for example, in the first sub-band reporting period, each partial bandwidth reports the first sub-band in the partial bandwidth.
Step S440, in the first sub-band reporting period, the first sub-band in each partial bandwidth is used as the current sub-band to be reported.
Step S450, configuring the maximum power parameter for the current sub-band to be reported, and configuring the power parameter lower than the maximum power parameter for other sub-bands at the same time, so that the terminal acquires the sub-band corresponding to the maximum power parameter as the current reporting sub-band according to the sub-band reporting rule corresponding to the preset maximum throughput, and reports the CSI corresponding to the current reporting sub-band.
Specifically, the base station determines a reporting sub-band corresponding to each partial bandwidth in each sub-band reporting period according to the sub-band reporting sequence, configures the power parameter of the current sub-band to be reported corresponding to the current reporting period in each partial bandwidth to be 1, and configures the power parameters of the remaining sub-bands to be 1/2. The method comprises the steps that a rule that a terminal selects a sub-band to report is preset as a maximum throughput rule, the terminal obtains a corresponding sub-band to report according to the preset rule, and a base station sets the power of a current sub-band to be reported corresponding to a current sub-band reporting period to be maximum in advance, so that the sub-band selected by the terminal in the current period is the current sub-band to be sent. The base station enables the terminal to send the current sub-band to be sent determined by the base station as the current sending sub-band when the base station carries out sub-band reporting by controlling the power of the sub-band, so that when the base station carries out power configuration on the corresponding sub-band according to the sub-band reporting sequence, the periodic reporting of all the sub-bands can be realized.
Step S460, in the mth subband reporting period, obtaining the mth subband corresponding to each partial bandwidth as the current subband to be reported, and executing step S450 until each partial bandwidth reports CSI corresponding to all subbands.
Specifically, the sequentially reporting means that after the reporting period of the first subband is ended, the reporting period of the second subband is entered, the subband is reported for the second time in each partial bandwidth in the reporting period of the second subband, the reported subband is the second subband, the power parameter corresponding to the second subband is sequentially modified to be 1, the other power parameters are 1/2, the reporting of the CSI of the second subband in each partial bandwidth is completed, and so on, in the mth subband, the CSI of the mth subband in each partial bandwidth is reported until each partial bandwidth finishes reporting the CSI of all corresponding subbands.
Step S470 is to configure MCS and frequency domain resources for the terminal according to the sub-band CSI reported by the terminal.
In the embodiment, the base station selects the sequential reporting mode based on the service type timeliness, so that the system complexity is reduced, and the cost is increased. Meanwhile, the base station sequentially controls the power of the sub-bands in each part of bandwidth according to a sub-band sequential reporting mode, so that the control terminal can complete the reporting of all the sub-bands of each part of bandwidth, and the system performance is improved.
As shown in fig. 6, in an embodiment, a method for periodically cross-reporting sub-bands is provided, which includes the following steps:
step S610, obtaining CSI reported by the terminal according to a preset broadband mode, wherein the CSI comprises a broadband PMI and a broadband first codebook serial number.
Step S620, when detecting that the serial number of the wideband first codebook does not change in the adjacent period, triggering the precoding type indication PTI to enable.
Step S630, selecting a sub-band reporting mode corresponding to a partial bandwidth as a cross reporting mode according to the received current service type corresponding to the terminal, and determining a preset sub-band reporting sequence corresponding to the cross reporting mode in each partial bandwidth.
Specifically, the preset subband reporting sequence corresponding to the cross reporting mode is a predefined subband reporting sequence, and the reporting sequence is independent of the subband position, and can be set as needed, as shown in fig. 7, a preset subband reporting sequence corresponding to the cross reporting mode is provided, and reporting is performed on each partial bandwidth in different subband reporting periods according to the sequence of SBi, SBk, and SBj …, where SBi, SBj, and SBk are adjacent subbands. And reporting according to the sequence of SBj, SBi and SBk …, wherein SBi, SBj and SBk are adjacent sub-bands, and the cross reporting mode can be determined according to the user requirement.
Step S640, in the first sub-band reporting period, acquiring the first sub-band corresponding to the reporting sequence of the preset sub-band corresponding to each partial bandwidth as the current sub-band to be reported.
Specifically, when the sub-band reporting sequence corresponding to the cross reporting sub-band is SBj, SBi, SBk …, in the first sub-band reporting period, the first sub-band SBj corresponding to the sub-band reporting sequence is acquired as the current sub-band to be reported.
Step S650, configuring the maximum power parameter for the sub-band to be reported currently, and configuring the power parameter lower than the maximum power parameter for other sub-bands at the same time, so that the terminal obtains the sub-band corresponding to the maximum power parameter as the current reporting sub-band according to the sub-band reporting rule corresponding to the preset maximum throughput, and reports the CSI corresponding to the current reporting sub-band.
Step S660, in the mth reporting period, acquiring the mth subband corresponding to the reporting sequence of the preset subband corresponding to each partial bandwidth as the current subband to be reported, and executing step S650 until each partial bandwidth reports CSI corresponding to all subbands.
Specifically, assuming that M is 5, in the 5 th reporting period, the subband corresponding to the preset subband reporting sequence is SBk +1, the subband SBk +1 is taken as the current reporting subband, and so on until all subbands are reported by each partial bandwidth according to the preset subband reporting sequence corresponding to the cross reporting mode.
And step S670, configuring MCS and frequency domain resources for the terminal according to the sub-band CSI reported by the terminal.
In the embodiment, a cross reporting mode is adopted, a sub-band reporting sequence is set in advance according to the terminal service type and the user requirement or the service type, the timeliness of sub-band reporting is improved, and the base station performs power control on the sub-bands in sequence according to the preset sub-band reporting sequence, so that the terminal can select the terminal which is required to be reported by the base station at present according to the maximum throughput rule for reporting, the periodic reporting of all the sub-bands is realized, and the system performance is improved.
As shown in fig. 8, in an embodiment, a periodic subband reporting apparatus is provided, including:
the sub-band reporting sequence determining module 810 is configured to determine, according to the received current service type corresponding to the terminal, a sub-band reporting mode of a partial bandwidth corresponding to the terminal, and determine a sub-band reporting sequence corresponding to the sub-band reporting mode in each partial bandwidth.
A current sub-band to be reported obtaining module 820, configured to determine, according to the sub-band reporting sequence, a current sub-band to be reported corresponding to each partial bandwidth in the current sub-band reporting period.
The subband power control module 830 is configured to configure the power parameter corresponding to the current subband to be reported corresponding to each partial bandwidth as the unique maximum power parameter.
In this embodiment, a periodic subband reporting apparatus is provided, where a service type currently corresponding to a terminal is obtained by receiving information reported by the terminal, so as to determine a subband reporting mode of a partial bandwidth corresponding to the terminal according to the service type of the terminal, and obtain a subband reporting order corresponding to the subband reporting mode, and further, in each subband reporting period, a base station determines a current subband to be reported corresponding to the current reporting period according to the subband reporting order, and configures a maximum power parameter for the current subband to be reported, and configuration power parameters corresponding to other subbands except the current subband to be reported in a partial bandwidth are all smaller than the maximum power parameter, so as to ensure that the power of the current subband to be reported corresponding to the current subband reporting period is maximum. The terminal can report the sub-band information periodically according to the sub-band reporting sequence through the power control of the base station, so that the base station can completely feed back the quality of the downlink channel to the base station through all sub-bands, the base station is favorable for distributing proper frequency domain resources to the terminal according to the fed-back quality of the downlink channel, and the system performance is improved.
In one embodiment, the sub-band reporting mode is a sequential reporting mode; the current sub-band to be reported obtaining module 820 is further configured to determine, according to the sequential reporting mode, an nth sub-band corresponding to each partial bandwidth as the current sub-band to be reported if the current sub-band reporting period is the nth sub-band reporting period, where N is an integer that is less than or equal to the maximum number of sub-bands corresponding to the partial bandwidths and is not zero.
In one embodiment, the sub-band reporting mode is a cross reporting mode; the current sub-band to be reported obtaining module 820 is further configured to determine, according to a preset reporting rule corresponding to the cross reporting mode, that the sub-band to be reported for the nth time corresponds to each partial bandwidth is the current sub-band to be reported if the reporting period of the current sub-band is the sub-band reporting period for the nth time, where N is an integer which is less than or equal to the maximum number of sub-bands corresponding to the partial bandwidth and is not zero.
As shown in fig. 9, in an embodiment, the periodic subband reporting device further includes:
the triggering module 840 is configured to receive a precoding matrix indicator PMI corresponding to a wideband periodically reported by the terminal according to a preset wideband reporting mode, and trigger a precoding type indicator PTI enable according to a first codebook sequence number obtained by the PMI when the first codebook sequence number does not change in an adjacent period, so that the terminal can report CSI corresponding to a subband after reporting a second codebook sequence number obtained by the wideband according to the PMI.
As shown in fig. 10, in an embodiment, the periodic subband reporting device further includes:
and the allocating module 850 is configured to obtain a precoding matrix indicator PMI and a channel quality indicator CQI corresponding to each current subband according to CSI corresponding to subbands periodically reported by the terminal, and allocate corresponding modulation and coding strategies MCS and frequency domain resources to the terminal according to the PMI and the CQI.
It will be understood by those skilled in the art that all or part of the processes in the methods of the embodiments described above may be implemented by hardware related to instructions of a computer program, which may be stored in a computer readable storage medium, for example, in the storage medium of a computer system, and executed by at least one processor in the computer system, so as to implement the processes of the embodiments including the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A method of periodic subband reporting, the method comprising:
determining a sub-band reporting mode of a part of bandwidth corresponding to a terminal according to a received current service type corresponding to the terminal, and determining a sub-band reporting sequence corresponding to the sub-band reporting mode;
determining a current sub-band to be reported corresponding to each partial bandwidth of a current sub-band reporting period according to the sub-band reporting sequence;
and configuring the power parameter corresponding to the current sub-band to be reported corresponding to each partial bandwidth as a unique maximum power parameter.
2. The method of claim 1, wherein the subband reporting mode is a sequential reporting mode; the step of determining the current sub-band to be reported corresponding to each partial bandwidth of the current sub-band reporting period according to the sub-band reporting sequence comprises the following steps:
and if the current sub-band reporting period is the nth sub-band reporting period, determining the nth sub-band corresponding to each partial bandwidth as the current sub-band to be reported according to the sequential reporting mode, wherein N is an integer which is less than or equal to the maximum sub-band number corresponding to the partial bandwidth and is not zero.
3. The method of claim 1, wherein the subband reporting mode is a cross reporting mode; the step of determining the current sub-band to be reported corresponding to each partial bandwidth of the current sub-band reporting period according to the sub-band reporting sequence comprises the following steps:
and if the current sub-band reporting period is the nth sub-band reporting period, determining the nth reported sub-band corresponding to each partial bandwidth as the current sub-band to be reported according to a preset reporting rule corresponding to the cross reporting mode, wherein N is an integer which is less than or equal to the maximum sub-band number corresponding to the partial bandwidth and is not zero.
4. The method of claim 1, further comprising:
receiving a Precoding Matrix Indicator (PMI) corresponding to a broadband periodically reported by the terminal according to a preset broadband reporting mode, and triggering Precoding Type Indicator (PTI) enabling when detecting that the first codebook sequence number reported by the terminal does not change in an adjacent period according to a first codebook sequence number obtained by the PMI, so that the terminal can report CSI corresponding to a subband after reporting a second codebook sequence number obtained by the broadband according to the PMI.
5. The method of claim 1 or 4, further comprising:
and acquiring a Precoding Matrix Indicator (PMI) and a Channel Quality Indicator (CQI) corresponding to each current sub-band according to the CSI corresponding to the sub-band periodically reported by the terminal, and allocating a corresponding Modulation and Coding Strategy (MCS) and frequency domain resources to the terminal according to the PMI and the CQI.
6. An apparatus for periodic subband reporting, the apparatus comprising:
a sub-band reporting sequence determining module, configured to determine, according to a received current service type corresponding to a terminal, a sub-band reporting mode of a partial bandwidth corresponding to the terminal, and determine a sub-band reporting sequence corresponding to the sub-band reporting mode;
a current sub-band to be reported obtaining module, configured to determine, according to the sub-band reporting sequence, a current sub-band to be reported corresponding to each partial bandwidth in a current sub-band reporting period;
and the sub-band power control module is used for configuring the power parameter corresponding to the current sub-band to be reported corresponding to each partial bandwidth as the unique maximum power parameter.
7. The apparatus of claim 6, wherein the subband reporting mode is a sequential reporting mode; and the current sub-band to be reported acquiring module is further configured to determine, according to the sequential reporting mode, an nth sub-band corresponding to each partial bandwidth as the current sub-band to be reported if the current sub-band reporting period is the nth sub-band reporting period, where N is an integer which is less than or equal to the maximum number of sub-bands corresponding to the partial bandwidths and is not zero.
8. The apparatus of claim 6, wherein the subband reporting mode is a cross reporting mode; and if the current sub-band reporting period is the nth sub-band reporting period, determining the nth reported sub-band corresponding to each partial bandwidth as the current sub-band to be reported according to a preset reporting rule corresponding to the cross reporting mode, wherein N is an integer which is less than or equal to the maximum number of sub-bands corresponding to the partial bandwidths and is not zero.
9. The apparatus of claim 6, further comprising:
the triggering module is used for receiving a Precoding Matrix Indicator (PMI) corresponding to a broadband periodically reported by the terminal according to a preset broadband reporting mode, and triggering Precoding Type Indicator (PTI) enabling when a first codebook sequence number does not change in an adjacent period according to a first codebook sequence number obtained by the PMI, so that the terminal can report CSI corresponding to the subband after reporting a second codebook sequence number obtained by the broadband according to the PMI.
10. The apparatus of claim 6 or 9, further comprising:
and the allocation module is used for acquiring a Precoding Matrix Indicator (PMI) and a Channel Quality Indicator (CQI) corresponding to each current sub-band according to the CSI corresponding to the sub-band periodically reported by the terminal, and allocating a corresponding Modulation and Coding Strategy (MCS) and frequency domain resources to the terminal according to the PMI and the CQI.
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