WO2016150308A1 - 一种mcs等级的确定方法和基站设备 - Google Patents

一种mcs等级的确定方法和基站设备 Download PDF

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Publication number
WO2016150308A1
WO2016150308A1 PCT/CN2016/076169 CN2016076169W WO2016150308A1 WO 2016150308 A1 WO2016150308 A1 WO 2016150308A1 CN 2016076169 W CN2016076169 W CN 2016076169W WO 2016150308 A1 WO2016150308 A1 WO 2016150308A1
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pusch
max
mcs
prb
srs
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PCT/CN2016/076169
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English (en)
French (fr)
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孔健
汪玲
苏进喜
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大唐移动通信设备有限公司
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Priority to EP16767685.7A priority Critical patent/EP3277039B1/en
Priority to US15/561,026 priority patent/US10333610B2/en
Publication of WO2016150308A1 publication Critical patent/WO2016150308A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
    • 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
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H04L1/0005—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes applied to payload information
    • 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
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/0011—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to payload information
    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H04L5/0046—Determination of how many bits are transmitted on different sub-channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for determining an MCS level and a base station device.
  • the uplink adaptive technology is: the base station device estimates the user uplink PUSCH (Physical Uplink Shared Channel) according to the signal quality of the user's uplink SRS (Sounding Reference Signal). The channel quality is shared, and then when the PUSCH is scheduled, an MCS (Modulation and Coding Style) matching the quality of the user channel is selected. Specifically, the base station device estimates a user uplink channel quality SINR (Signal to Interference plus Noise Ratio) according to the uplink SRS signal of the user, and approximates that the SINR measured by the SRS is equal to the SINR of the user PUSCH channel. , thereby determining the MCS level corresponding to the user PUSCH channel. Further, the base station device can determine the number of physical resource blocks (PRBs) to be scheduled by the PUSCH according to the MCS level and the amount of data to be transmitted by the user.
  • PRBs physical resource blocks
  • the MCS estimated directly by the SRS is used as the MCS of the PUSCH, and in some cases, the two are not equal. Since the terminal device has a maximum transmission power limit, the SRS signal and the PUSCH signal are not necessarily limited by the maximum transmission power at the same time, and thus the single PRB transmission power of the SRS signal and the PUSCH signal are not necessarily the same.
  • the SRS is configured with 96 PRBs. When the user is at a far point, the uplink transmission power is limited due to the large path loss. The actual single PRB transmission power does not reach the expected power. When the user schedules the PUSCH, the amount of data to be transmitted is small.
  • the actual PRSCH scheduling of the PUSCH is small, so the PUSCH single PRB transmission power is higher than the SRS single PRB transmission power, that is, the SINR of the PUSCH is greater than the SINR of the SRS channel, that is, the SINR estimated by the SRS signal cannot represent the SINR of the PUSCH, according to the SRS. It is not appropriate for the MCS estimated by the signal to directly schedule the MCS as the user PUSCH.
  • the PRB uses the same MCS level, which is unreasonable in some cases.
  • the actual received power on the single PRB is not equal to the expected received power, and the number of different PUSCH PRBs is scheduled.
  • the transmission power of the single PRB is different, that is, the SINR of the PUSCH channel is different when the number of different PRBs is different. of. For example, 50 PRBs are scheduled at the previous moment, the power on each PRB is 6 dBm, and 25 PRBs are scheduled at the next moment, and the power on each PRB is 9 dBm.
  • the SINR of the actual PUSCH channel is inconsistent.
  • the selected MCS level may be too high.
  • the selected MCS level may be biased. low.
  • the number of scheduled PRBs for the PUSCH there is no limitation on the number of scheduled PRBs for the PUSCH, and the cell edge PUSCH reception performance cannot be guaranteed.
  • the scheduling MCS level is adjusted to 0, but the edge user PUSCH scheduling PRB number is not limited. If 96PRB is scheduled at this time, the base station device single PRB receiving power will be very Low, even if MCS level 0 is scheduled, it cannot be decoded correctly.
  • the embodiment of the present invention provides a method for determining an MCS level and a base station device, so as to fully consider the difference between the actual scheduled PUSCH bandwidth and the SRS bandwidth, and the constraint that the terminal device has the maximum transmission power limit, and accurately calculate the actual available MCS for the user to transmit a certain amount of data.
  • Level and corresponding number of PRBs are examples of PRBs.
  • An embodiment of the present invention provides a method for determining a MCS level of a modulation and coding method, where the method includes:
  • the base station device calculates a second SINR of the physical uplink shared channel PUSCH signal according to the first signal to interference plus noise ratio SINR measured by the sounding reference signal SRS signal at time k 0 ;
  • the base station device calculates the actual scheduled physical resource block PRB number and the actually used second MCS level according to the first MCS level and the amount of data that the user actually needs to transmit.
  • the process of calculating, by the base station device, the second SINR of the physical uplink shared channel PUSCH signal according to the first signal to interference plus noise ratio SINR measured by the sounding reference signal SRS signal at time k 0 specifically including: the base station The device calculates a second SINR of the PUSCH signal according to the first SINR, and a power difference of the SRS signal and the PUSCH signal in the single resource particle RE.
  • the process of calculating, by the base station device, the second SINR of the PUSCH signal according to the first SINR and the power difference of the SRS signal and the PUSCH signal in the single resource particle RE specifically, the base station device uses the following The formula calculates a second SINR of the PUSCH signal:
  • SINR' in (k 0 ) is a second SINR of the PUSCH signal
  • SINR in (k 0 ) is the first SINR
  • P PUSCH_RE_max ⁇ P SRS_RE is a power difference between the SRS signal and the PUSCH signal in a single RE.
  • the method further comprises:
  • the base station device calculates a power difference between the SRS signal and the PUSCH signal in a single RE according to the PHR parameter and the SRS parameter, and calculates that the terminal device sends the PUSCH according to the expected power and the PUSCH of the preset number of PRBs.
  • the power difference of a single RE is a single RE.
  • the base station device reports the PHR parameter and the SRS parameter according to the power headroom, calculates a power difference between the SRS signal and the PUSCH signal in a single RE, and calculates that the terminal device sends the PUSCH according to the expected power and sends a preset number of PRBs.
  • the difference in power of a single RE at PUSCH including:
  • P PUSCH_RE_max -P SRS_RE is a power difference of the SRS signal and the PUSCH signal in a single RE
  • P PUSCH_RE_max_noLimt -P PUSCH_RE_max is a power of the single RE when the terminal equipment transmits the PUSCH according to the expected power and transmits the PUSCH of the preset number of PRBs Difference
  • P SRS_OFFSET is the power offset of the SRS signal
  • M SRS is the bandwidth of the SRS signal
  • PRB_MAX is the preset number
  • M PUSCH (i) is the number of PRBs of the PUSCH carrying the PHR of the terminal device at time i
  • PH(i) is The PHR reported by the terminal device at the moment i.
  • the base station device calculates, according to the first MCS level and the amount of data that the user actually needs to transmit, the process of actually scheduling the physical resource block PRB number and the actually used second MCS level, specifically including: step A,
  • the base station device calculates a maximum transport block size TBS that can be supported according to MCS_init_noLimt(k 0 ) and PRB_MAX_noLimt. If the amount of data that the user actually needs to transmit is less than or equal to the maximum TBS, the base station device calculates the second MCS level MCS index.
  • step B For the MCS_init_noLimt(k 0 ), and calculate the number of PRBs required for actual scheduling according to the second MCS level, and end the process; if the amount of data that the user actually needs to transmit is greater than the maximum TBS, step B is performed;
  • PRB_MAX_noLimt terminal device when the scheduling MCS_init_noLimt (k 0) k 0 is transmitted in time according to a single PRB corresponding to a desired power level of a first MCS level, PRB_MAX_noLimt terminal device according to a single PRB desired power level is a maximum transmission power of the transmission power of the number of PRB, MCS_diff iteration
  • the MCS_init_sche_max is the MCS level that can be supported when the maximum PRB number is PRB_MAX_scheduled.
  • the PRB_MAX_scheduled is the maximum number of PRBs that can be scheduled according to a certain MCS level limit.
  • PRB_MAX is the preset number of PRBs
  • PRB_NUM is based on The number of PRBs required to transmit user data calculated by MCS_actual_b.
  • the method further comprises:
  • the base station device calculates the PRB_MAX_scheduled and the MCS_init_sche_max according to the first MCS level MCS init and a pre-configured minimum MCS level target_MCS.
  • the base station device calculates the PRB_MAX_scheduled and the MCS_init_sche_max according to the first MCS level MCS init and the pre-configured minimum MCS level target_MCS, specifically, when the MCS init ⁇ target_MCS, the base station device The calculation needs to limit the maximum number of PRBs currently scheduled.
  • An embodiment of the present invention provides a base station device, where the base station device specifically includes:
  • a first calculating module configured to calculate a second SINR of the physical uplink shared channel PUSCH signal according to the first signal to interference plus noise ratio SINR measured by the sounding reference signal SRS signal at time k 0 ;
  • a determining module configured to determine a first modulation and coding mode MCS level according to the second SINR
  • the second calculating module is configured to calculate the actual scheduled physical resource block PRB number and the actually used second MCS level according to the first MCS level and the amount of data that the user actually needs to transmit.
  • the first calculating module is specifically configured to calculate a second SINR of the PUSCH signal according to a power difference between the first SINR, the SRS signal, and the PUSCH signal in a single resource particle RE.
  • the first calculating module is further configured to calculate a second SINR of the PUSCH signal by using the following formula:
  • SINR' in (k 0 ) is a second SINR of the PUSCH signal
  • SINR in (k 0 ) is the first SINR
  • P PUSCH_RE_max ⁇ P SRS_RE is a power difference between the SRS signal and the PUSCH signal in a single RE.
  • the first calculating module is further configured to calculate a power difference between the SRS signal and the PUSCH signal in a single RE according to the power headroom to report the PHR parameter and the SRS parameter, and calculate, when the terminal device sends the PUSCH according to the expected power, and send The difference in power of a single RE when a PUSCH of a predetermined number of PRBs is preset.
  • P PUSCH_RE_max - P SRS_RE 10 log 10 (M SRS ) - 10 log 10 (PRB_MAX) - 3, P is calculated.
  • PUSCH_RE_max_noLimt -P PUSCH_RE_max 10log 10 (PRB_MAX)-10log 10 (M PUSCH (i))-PH(i); or,
  • P PUSCH_RE_max -P SRS_RE is a power difference of the SRS signal and the PUSCH signal in a single RE
  • P PUSCH_RE_max_noLimt -P PUSCH_RE_max is a power of the single RE when the terminal equipment transmits the PUSCH according to the expected power and transmits the PUSCH of the preset number of PRBs Difference
  • P SRS_OFFSET is the power offset of the SRS signal
  • M SRS is the bandwidth of the SRS signal
  • PRB_MAX is the preset number
  • M PUSCH (i) is the number of PRBs of the PUSCH carrying the PHR of the terminal device at time i
  • PH(i) is The PHR reported by the terminal device at the moment i.
  • the second calculating module is configured to calculate the actually scheduled PRB number and the actually used second MCS level according to the following steps: Step A: Calculate the maximum transport block size that can be supported according to MCS_init_noLimt(k 0 ) and PRB_MAX_noLimt
  • the TBS calculates the second MCS level MCS index as MCS_init_noLimt(k 0 ) if the amount of data that the user actually needs to transmit is less than or equal to the maximum TBS, and calculates the PRB required for actual scheduling according to the second MCS level. Number, and end the process; if the amount of data that the user actually needs to transmit is greater than the maximum TBS, step B is performed;
  • PRB_MAX_noLimt terminal device when the scheduling MCS_init_noLimt (k 0) k 0 is transmitted in time according to a single PRB corresponding to a desired power level of a first MCS level, PRB_MAX_noLimt terminal device according to a single PRB desired power level is a maximum transmission power of the transmission power of the number of PRB, MCS_diff iteration
  • the MCS_init_sche_max is the MCS level that can be supported when the maximum PRB number is PRB_MAX_scheduled.
  • the PRB_MAX_scheduled is the maximum number of PRBs that can be scheduled according to a certain MCS level limit.
  • PRB_MAX is the preset number of PRBs
  • PRB_NUM is based on The number of PRBs required to transmit user data calculated by MCS_actual_b.
  • the second calculating module is further configured to calculate the PRB_MAX_scheduled and the MCS_init_sche_max according to the first MCS level MCS init and the pre-configured minimum MCS level target_MCS.
  • an embodiment of the present invention further discloses a computer program comprising computer readable code, when the computer readable code is run on a base station, causing the base station device to perform any one of the claims The method for determining the MCS level of the modulation and coding method.
  • embodiments of the present invention also disclose a computer readable medium storing the computer program as claimed in the claims.
  • the embodiment of the present invention has at least the following advantages: in the embodiment of the present invention, when calculating the MCS of the PUSCH, the PUB number and the transmission power information of the terminal device are considered, and the PUSCH that schedules a certain number of PRBs is accurately calculated. Corresponding MCS level, the MCS level of the PUSCH is matched with the actual SINR of the PUSCH channel, and the problem that the SINR of the SRS and the PUSCH are different and the scheduling of the MCS is the same is caused when the transmission power of the terminal device in the prior art is limited.
  • the problem that the PUSCH corresponding to different PRBs has different SINRs but the scheduling MCS is the same when the transmission power of the terminal device is limited is also solved, and the receiving performance of the PUSCH is effectively ensured, thereby improving the uplink transmission efficiency of the LTE system. Further, since the general cell edge user is prone to the situation that the uplink transmission power is limited, and the solution specifically solves the problem that the MCS selection of the PUSCH that may occur in this case is inappropriate, the solution is particularly beneficial for improving the cell edge user. Uplink transmission efficiency.
  • the solution limits the minimum MCS level of the uplink scheduling, and reduces the maximum schedulable PRB number in this case, ensuring the PUSCH transmission performance of the user with a large cell edge and a large path loss, and avoids excessive number of scheduled PRBs.
  • the problem that all the PUSCHs of the single PRB are too low due to the low SINR is beneficial to improve the uplink service rate of the edge users.
  • FIG. 1 is a schematic flowchart of a method for determining an MCS level according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of a base station device according to Embodiment 2 of the present invention.
  • FIG. 3 is a structural block diagram of a base station for performing a method for determining a modulation coding mode MCS level according to an embodiment of the present invention
  • FIG. 4 is a memory unit for holding or carrying program code for implementing a method of determining a modulation coding mode MCS level, in accordance with an embodiment of the present invention.
  • the first embodiment of the present invention provides a method for determining an MCS level, and proposes a method for accurately estimating an uplink scheduling MCS and a corresponding PRB number.
  • PRB_MAX The maximum number of PRBs that the base station device can schedule. The recommended value is 96.
  • PH(i) PHR (Power Headroom Reporting) reported by the terminal device at the time i.
  • M SRS The bandwidth of the SRS (ie the number of PRBs).
  • P SRS_OFFSET The power offset of the SRS, which is the configuration parameter.
  • PRB_MAX_noLimt The number of PRBs scheduled when the transmission power of the terminal device is P CMAX (maximum transmission power).
  • P SRS_RE Transmit power of a single RE (Resource Element) of the SRS signal.
  • P PUSCH_RE_phr The transmission power of the single RE when the base station equipment schedules the number of PRBs to be M PUSCH (i).
  • P PUSCH_RE_max The transmission power of the single RE when the base station equipment schedules the number of PRBs to be PRB_MAX.
  • P PUSCH_RE_max_noLimt The transmission power of a single RE of the PUSCH when the power is just limited, that is, the transmission power of the single RE when the terminal equipment transmits the PUSCH according to the expected power.
  • MCS init The MCS level of the base station equipment when the number of PRBs is PRB_MAX.
  • PRB_MAX_scheduled The maximum number of PRBs that the base station device can schedule based on the actual MCS level.
  • MCS_init_sche_max The MCS level that the base station equipment can support when the maximum number of PRBs is PRB_MAX_scheduled.
  • PRB_scheduled The number of PRBs that the base station device actually schedules according to the wave number of the terminal device and the MCS level.
  • MCS_diff Iteratively calculates the MCS difference threshold for termination.
  • the method for determining the MCS level includes the following steps:
  • Step 101 the first base station apparatus SINR obtained according to the SRS signal k 0 time measurement (e.g. SINR in (k 0)), the second SINR calculation PUSCH signal (PRB_MAX a PRB) (e.g., SINR in (k 0)).
  • SINR in (k 0) the SINR in (k 0)
  • PRB_MAX a PRB the second SINR calculation PUSCH signal
  • the first SINR (such as SINR in (k 0)), a second SINR (such as SINR 'calculated PUSCH signal (PRB_MAX a PRB) of the base station apparatus obtained according to the SRS signal measurements in the time k 0 ( The process of k 0 )) specifically includes, but is not limited to, the base station device calculates a second SINR of the PUSCH signal according to the first SINR and the power difference of the SRS signal and the PUSCH signal in the single RE.
  • the base station device calculates a second SINR of the PUSCH signal according to the first SINR and the power difference of the SRS signal and the PUSCH signal in the single RE.
  • the process for the base station device to calculate the second SINR of the PUSCH signal according to the power difference of the single RE of the first SINR, the SRS signal, and the PUSCH signal specifically includes: the base station device calculates the second SINR of the PUSCH signal by using the following formula:
  • the SINR' in (k 0 ) is the second SINR of the PUSCH signal
  • the SINR in (k 0 ) is the first SINR
  • the P PUSCH_RE_max ⁇ P SRS_RE is the power difference between the SRS signal and the PUSCH signal in the single RE.
  • the base station device may further calculate a power difference between the SRS signal and the PUSCH signal (the PRB number is PRB_MAX) in a single RE according to the PHR parameter and the SRS parameter, and calculate that the terminal device is in accordance with the expected power.
  • the base station device may further calculate a power difference between the SRS signal and the PUSCH signal (the PRB number is PRB_MAX) in a single RE according to the PHR parameter and the SRS parameter, and calculate that the terminal device is in accordance with the expected power.
  • PRB_MAX preset number
  • the calculation process may be performed only at the time when the SRS is reported, and the PHR uses the PHR value that was last reported.
  • the base station device calculates a power difference between the SRS signal and the PUSCH signal (the PRB number is PRB_MAX) in a single RE according to the PHR parameter and the SRS parameter, and calculates that the terminal device sends the PUSCH according to the expected power and sends the preset.
  • the process of the power difference of the single RE in the number of (PRB_MAX) PRBs including but not limited to the following:
  • P PUSCH_RE_max -P SRS_RE is the power difference between the SRS signal and the PUSCH signal in a single RE
  • P PUSCH_RE_max_noLimt -P PUSCH_RE_max is when the terminal device sends the PUSCH according to the expected power and sends the pre- Set the power difference of the single RE in the number of PRB_MAX PRBs
  • P SRS_OFFSET is the power offset of the SRS signal
  • M SRS is the bandwidth of the SRS signal
  • PRB_MAX is the preset number
  • M PUSCH (i) is the time i The number of PRBs of the PUSCH of the PHR carrying the terminal device
  • PH(i) is the PHR reported by the terminal device at the time i.
  • Step 102 The base station device determines the first MCS level according to the second SINR of the PUSCH signal, that is, determines the scheduling MCS level MCS init according to the SINR' in (k 0 ) of the PUSCH (PRB_MAX PRBs).
  • Step 103 The base station device calculates the actual scheduled PRB number (PRB_scheduled) and the actually used second MCS level (MCS index ) according to the first MCS level and the amount of data that the user actually needs to transmit.
  • PRB_scheduled the actual scheduled PRB number
  • MCS index the actually used second MCS level
  • the base station device calculates a process of actually scheduling the number of PRBs and actually using the second MCS level according to the first MCS level and the amount of data that the user actually needs to transmit, including:
  • Step A The base station device calculates a maximum transportable block size (Transport Block Size) that can be supported according to the MCS_init_noLimt(k 0 ) and the PRB_MAX_noLimt. If the amount of data that the user actually needs to transmit is less than or equal to the maximum TBS, the base station device calculates the second MCS.
  • the level MCS index is MCS_init_noLimt(k 0 ), and the number of PRBs required for actual scheduling is calculated according to the second MCS level, and the process ends; if the amount of data that the user actually needs to transmit is greater than the maximum TBS, step B is performed.
  • MCS_init_noLimt (k 0) k 0 is transmitted in time according to a single PRB corresponding to a desired power level of a first MCS level
  • PRB_MAX_noLimt terminal device is the number of PRB scheduled transmission power when the maximum transmission power
  • MCS_diff iteration The MCS_init_sche_max is the MCS level that can be supported when the maximum PRB number is PRB_MAX_scheduled.
  • the PRB_MAX_scheduled is the maximum number of PRBs that can be scheduled according to a certain MCS level limit.
  • PRB_MAX is the preset number of PRBs
  • PRB_NUM is based on The number of PRBs required to transmit user data calculated by MCS_actual_b.
  • the base station device may further calculate PRB_MAX_scheduled and MCS_init_sche_max according to the first MCS level MCS init and the pre-configured minimum MCS level target_MCS.
  • the minimum MCS level of the scheduling is limited to target_MCS, and the maximum schedulable PRB number PRB_MAX_scheduled is calculated according to the first MCS level MCS init and the pre-configured minimum MCS level target_MCS.
  • the MCS level MCS_init_sche_max when the maximum number of PRBs is scheduled. If the terminal device currently expects the power level to fail to reach target_MCS, the MCS level of the current desired power level of the terminal device is taken as MCS_init_sche_max.
  • the base station device calculates, according to the first MCS level MCS init and the pre-configured minimum MCS level target_MCS, a process of schedulable maximum PRB number PRB_MAX_scheduled and MCS level MCS_init_sche_max when scheduling the maximum number of PRBs, including but not limited to The following way:
  • the MCS_init(k 0 ) is the first MCS level at time k 0
  • the P PUSCH_RE_max_noLimt ⁇ P PUSCH_RE_max is the power difference of the single RE when the terminal device transmits the PUSCH according to the expected power and transmits the PUSCH of the preset number of PRBs.
  • the difference between the PRB number of the PUSCH and the PRB number of the SRS is considered, and the PUSCH transmission power is converted.
  • SINR the number of PRBs for scheduling PUSCH changes every TTI (Transmission Time Interval)
  • PRB_MAX the MCS level that can be supported according to the maximum number of PRBs scheduled for PUSCH
  • the initial MCS level that is, the initial scheduling MCS is the number of PRBs corresponding to the maximum scheduled PUSCH, and is the estimated MCS based on the maximum number of scheduled PUSCH PRBs, and the user finally
  • the actual scheduling MCS is also determined based on the number of PRBs actually transmitted by the user at that time. Since the excessively low MCS level is not conducive to improving the transmission efficiency of the system, the minimum MCS level of the scheduling is limited. If the initial MCS level is less than the minimum MCS level, the initial scheduling MCS is recalculated, and if the expected power is allowed, the initial MCS is set to the minimum MCS. Level limit while reducing the maximum number of schedulable PRBs.
  • the number of required PRBs is calculated according to the initial MCS level and the amount of data to be transmitted. If the number of required PRBs is small, the PUSCH single PRB power may change, and the MCS level may be scheduled to change. The MCS level continues to calculate the number of required PRBs, and thus iteratively calculates, and finally obtains the most suitable MCS level and PRB number for transmitting data.
  • the embodiment of the present invention has at least the following advantages: in the embodiment of the present invention, when calculating the MCS of the PUSCH, the PUB number and the transmission power information of the terminal device are considered, and the PUSCH that schedules a certain number of PRBs is accurately calculated. Corresponding MCS level, the MCS level of the PUSCH is matched with the actual SINR of the PUSCH channel, and the problem that the SINR of the SRS and the PUSCH are different and the scheduling of the MCS is the same is caused when the transmission power of the terminal device in the prior art is limited.
  • the problem that the PUSCH corresponding to different PRBs has different SINRs but the scheduling MCS is the same when the transmission power of the terminal device is limited is also solved, and the receiving performance of the PUSCH is effectively ensured, thereby improving the uplink transmission efficiency of the LTE system. Further, since the general cell edge user is prone to the situation that the uplink transmission power is limited, and the solution specifically solves the problem that the MCS selection of the PUSCH that may occur in this case is inappropriate, the solution is particularly beneficial for improving the cell edge user. Uplink transmission efficiency.
  • the solution limits the minimum MCS level of the uplink scheduling, and reduces the maximum schedulable PRB number in this case, ensuring the PUSCH transmission performance of the user with a large cell edge and a large path loss, and avoids excessive number of scheduled PRBs.
  • the problem that all the PUSCHs of the single PRB are too low due to the low SINR is beneficial to improve the uplink service rate of the edge users.
  • the embodiment of the present invention further provides a base station device.
  • the base station device specifically includes:
  • the first calculating module 11 is configured to calculate a second SINR of the physical uplink shared channel PUSCH signal according to the first signal and interference plus noise ratio SINR measured by the SRS signal at time k 0 ;
  • the determining module 12 is configured to determine a first modulation and coding mode MCS level according to the second SINR;
  • the second calculating module 13 is configured to calculate the actually scheduled physical resource block PRB number and the actually used second MCS level according to the first MCS level and the amount of data that the user actually needs to transmit.
  • the first calculating module 11 is specifically configured to calculate a second SINR of the PUSCH signal according to a power difference between the first SINR, the SRS signal, and the PUSCH signal in a single resource particle RE.
  • the first calculating module 11 is further configured to calculate a second SINR of the PUSCH signal by using the following formula:
  • SINR' in (k 0 ) is a second SINR of the PUSCH signal
  • SINR in (k 0 ) is the first SINR
  • P PUSCH_RE_max ⁇ P SRS_RE is a power difference between the SRS signal and the PUSCH signal in a single RE.
  • the first calculating module 11 is further configured to calculate a power difference between the SRS signal and the PUSCH signal in a single RE according to the power headroom to report the PHR parameter and the SRS parameter, and calculate the terminal device to send the PUSCH according to the expected power and send the preset number.
  • P PUSCH_RE_max - P SRS_RE 10 log 10 (M SRS ) - 10 log 10 (PRB_MAX) - 3, P is calculated.
  • PUSCH_RE_max_noLimt -P PUSCH_RE_max 10log 10 (PRB_MAX)-10log 10 (M PUSCH (i))-PH(i); or,
  • P PUSCH_RE_max -P SRS_RE is a power difference of the SRS signal and the PUSCH signal in a single RE
  • P PUSCH_RE_max_noLimt -P PUSCH_RE_max is a power of the single RE when the terminal equipment transmits the PUSCH according to the expected power and transmits the PUSCH of the preset number of PRBs Difference
  • P SRS_OFFSET is the power offset of the SRS signal
  • M SRS is the bandwidth of the SRS signal
  • PRB_MAX is the preset number
  • M PUSCH (i) is the number of PRBs of the PUSCH carrying the PHR of the terminal device at time i
  • PH(i) is The PHR reported by the terminal device at the moment i.
  • the second calculating module 13 is configured to calculate the actually scheduled PRB number and the actually used second MCS level according to the following steps: Step A: Calculate a maximum transport block size TBS that can be supported according to MCS_init_noLimt(k 0 ) and PRB_MAX_noLimt, If the amount of data that the user actually needs to transmit is less than or equal to the maximum TBS, calculate the second MCS level MCS index as MCS_init_noLimt(k 0 ), and calculate the number of PRBs required for actual scheduling according to the second MCS level. And ending the process; if the amount of data that the user actually needs to transmit is greater than the maximum TBS, step B is performed;
  • PRB_MAX_noLimt terminal device when the scheduling MCS_init_noLimt (k 0) k 0 is transmitted in time according to a single PRB corresponding to a desired power level of a first MCS level, PRB_MAX_noLimt terminal device according to a single PRB desired power level is a maximum transmission power of the transmission power of the number of PRB, MCS_diff iteration
  • the MCS_init_sche_max is the MCS level that can be supported when the maximum PRB number is PRB_MAX_scheduled.
  • the PRB_MAX_scheduled is the maximum number of PRBs that can be scheduled according to a certain MCS level limit.
  • PRB_MAX is the preset number of PRBs
  • PRB_NUM is based on The number of PRBs required to transmit user data calculated by MCS_actual_b.
  • the second calculating module 13 is further configured to calculate the PRB_MAX_scheduled and the MCS_init_sche_max according to the first MCS level MCS init and the pre-configured minimum MCS level target_MCS.
  • modules of the device of the present invention may be integrated or integrated.
  • Above Modules can be combined into one module or split into multiple submodules.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a A computer device (which may be a personal computer, server, or network device, etc.) performs the methods described in various embodiments of the present invention.
  • modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment.
  • the modules or units or components of the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components.
  • any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined.
  • Each feature disclosed in this specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent or similar purpose.
  • the various component embodiments of the present invention may be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof.
  • a microprocessor or digital signal processor may be used in practice to implement some or all of the functionality of some or all of the components of the uplink frequency selective scheduling device in accordance with embodiments of the present invention.
  • the invention may also be embodied as a device for performing some or all of the methods described herein.
  • a device or device program (for example, a computer program and a computer program product).
  • Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.
  • FIG. 3 shows a structural block diagram of a base station for performing a method of determining a modulation coding mode MCS level according to an embodiment of the present invention.
  • the base station conventionally includes a processor 310 and a computer program product or computer readable medium in the form of a memory 320.
  • the memory 320 may be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), an EPROM, a hard disk, or a ROM.
  • the memory 320 has a memory space 330 for program code 331 for performing any of the method steps described above.
  • storage space 330 for program code may include various program code 331 for implementing various steps in the above methods, respectively.
  • the program code can be read from or written to one or more computer program products.
  • These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks.
  • Such a computer program product is typically a portable or fixed storage unit as described with reference to FIG.
  • the storage unit may have a storage section, a storage space, and the like arranged similarly to the storage 320 in the base station of FIG.
  • the program code can be compressed, for example, in an appropriate form.
  • the storage unit includes computer readable code 331', code that can be read by a processor, such as 310, which, when executed by a base station, causes the base station to perform various steps in the methods described above.

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Abstract

本发明实施例公开了一种MCS等级的确定方法和基站设备，该方法包括：基站设备根据k0时刻的SRS信号测量得到的第一SINR，计算PUSCH信号的第二SINR；基站设备根据所述第二SINR确定第一MCS等级；基站设备根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的PRB数和实际使用的第二MCS等级。本发明实施例中，PUSCH的MCS等级与PUSCH信道的实际SINR相匹配，有效保证了PUSCH的接收性能，从而提高了LTE系统的上行传输效率，尤其有利于提高小区边缘用户的上行传输效率，保证了小区边缘、路损较大用户的PUSCH传输性能，有利于提高了边缘用户的上行业务速率。

Description

一种MCS等级的确定方法和基站设备 技术领域
本发明涉及通信技术领域，尤其是涉及一种MCS等级的确定方法和基站设备。
背景技术
在LTE(Long Term Evolution，长期演进)系统中，上行链路自适应技术就是：基站设备根据用户上行SRS(Sounding Reference Signal，探测参考信号)信号质量估计用户上行PUSCH(Physical Uplink Shared Channel，物理上行共享信道)信道质量，然后在调度PUSCH时，选择与用户信道质量相匹配的MCS(Modulation and Coding Style，调制编码方式)。具体的，基站设备根据用户的上行SRS信号，估计用户上行信道质量SINR(Signal to Interference plus Noise Ratio，信号与干扰加噪声比)，并近似的认为SRS测量得到的SINR将等于用户PUSCH信道的SINR，从而确定出用户PUSCH信道对应的MCS等级。进一步的，基站设备在调度用户时，可以根据这个MCS等级以及用户待传输的数据量确定出PUSCH需要调度的PRB(Physical Resource Block，物理资源块)数。
直接以SRS估计出的MCS作为PUSCH的MCS，在某些情况下两者并不相等。由于终端设备有最大发送功率限制，SRS信号和PUSCH信号不一定同时受到最大发送功率限制，因此SRS信号和PUSCH信号的单PRB发送功率并不一定相同。例如，SRS配置96个PRB，当用户处于远点时，由于路损较大导致上行发送功率受限，实际单PRB发送功率达不到期望功率，用户调度PUSCH时，由于待传输数据量少，实际调度PUSCH的PRB少，因此PUSCH单PRB发送功率高于SRS单PRB发送功率，即PUSCH的SINR大于SRS信道的SINR，这就是说，以SRS信号估算出的SINR不能代表PUSCH的SINR，根据SRS信号估计出的MCS直接作为用户PUSCH调度MCS不合适。
无论最终PUSCH调度多少，PRB均采用相同MCS等级，在某些情况下不合理。当PUSCH发送功率达到最大值时，单PRB上实际接收功率已不等于期望接收功率，调度不同PUSCH PRB数，单PRB的发送功率不一样，也就是说，不同PRB数时PUSCH信道的SINR是不同的。例如，前一时刻调度50个PRB，每个PRB上的功率为6dBm，后一时刻调度25个PRB，每个PRB上的功率为9dBm。如果按照相同MCS来调度，就与实际PUSCH信道的SINR不一致，对于单PRB功率6dBm的PUSCH来说，选择的MCS等级可能偏高，对于单PRB功率9dBm的PUSCH来说，选择的MCS等级可能偏低。
对于PUSCH的调度PRB数没有限制，无法保证小区边缘PUSCH接收性能。当用户处于小区边缘、路损很大、上行发送功率受限时，调度MCS等级会调整到0，但是不限制边缘用户PUSCH调度PRB数，如果此时调度96PRB，基站设备单PRB接收功率会很低，即使调度MCS等级0也无法译码正确。
发明内容
本发明实施例提供一种MCS等级的确定方法和基站设备，以充分考虑实际调度PUSCH带宽与SRS带宽的差异，以及终端设备存在最大发送功率限制的约束，精确计算用户传输一定数据量实际可用MCS等级及对应的PRB数。
本发明实施例提供一种调制编码方式MCS等级的确定方法，该方法包括：
基站设备根据k0时刻的探测参考信号SRS信号测量得到的第一信号与干扰加噪声比SINR，计算物理上行共享信道PUSCH信号的第二SINR；
所述基站设备根据所述PUSCH信号的第二SINR确定第一MCS等级；
所述基站设备根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的物理资源块PRB数和实际使用的第二MCS等级。
优选的，所述基站设备根据k0时刻的探测参考信号SRS信号测量得到的 第一信号与干扰加噪声比SINR，计算物理上行共享信道PUSCH信号的第二SINR的过程，具体包括：所述基站设备根据所述第一SINR、以及SRS信号和PUSCH信号在单资源粒子RE的功率差异，计算所述PUSCH信号的第二SINR。
优选的，所述基站设备根据所述第一SINR、以及SRS信号和PUSCH信号在单资源粒子RE的功率差异，计算所述PUSCH信号的第二SINR的过程，具体包括：所述基站设备利用如下公式计算所述PUSCH信号的第二SINR：
Figure PCTCN2016076169-appb-000001
其中，SINR’in(k0)为所述PUSCH信号的第二SINR，SINRin(k0)为所述第一SINR，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异。
优选的，所述方法进一步包括：
所述基站设备根据功率余量上报PHR参数以及SRS参数，计算SRS信号和PUSCH信号在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
优选的，所述基站设备根据功率余量上报PHR参数以及SRS参数，计算SRS信号和PUSCH信号在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异，包括：
当SRS信号的总发送功率未达到最大值，预设数量个PRB时PUSCH的总发送功率未达到最大值时，所述基站设备计算PPUSCH_RE_max-PSRS_RE＝-(PSRS_OFFSET+3)，所述基站设备计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；或者，
当SRS信号的总发送功率达到最大值，预设数量个PRB时PUSCH的总发送功率达到最大值时，基站设备计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(PRB_MAX)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
当SRS信号的总发送功率未达到最大数值，并且预设数量个PRB时PUSCH的总发送功率达到最大数值时，则所述基站设备计算PPUSCH_RE_max-PSRS_RE＝PH(i)+10log10(MPUSCH)-10log10(PRB_MAX)-(PSRS_OFFSET+3)，并计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
当SRS信号的总发送功率达到最大数值，并且预设数量个PRB时PUSCH的总发送功率未达到最大数值时，则所述基站设备计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(MPUSCH(i))-PH(i)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；
其中，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异；PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异；PSRS_OFFSET为SRS信号的功率偏移；MSRS为SRS信号的带宽；PRB_MAX为预设数量；MPUSCH(i)为时刻i携带终端设备的PHR的PUSCH的PRB数；PH(i)为时刻i终端设备上报的PHR。
优选的，所述基站设备根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的物理资源块PRB数和实际使用的第二MCS等级的过程，具体包括：步骤A、所述基站设备根据MCS_init_noLimt(k0)和PRB_MAX_noLimt计算能够支持的最大传输块大小TBS，如果用户实际需要传输的数据量小于等于所述最大TBS，则所述基站设备计算所述第二MCS等级MCSindex为MCS_init_noLimt(k0)，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；如果用户实际需要传输的数据量大于所述最大TBS，则执行步骤B；
步骤B、所述基站设备获得MCS_actual_b，计算MCS_actual_a＝MCS_actual_b+Δ；如果(MCS_actual_a-MCS_actual_b)≤MCS_diff，执行步骤C；否则，所述基站设备计算MCS_actual_b＝MCS_actual_a，重复步骤B；MCS_actual_b初始值为MCS_init_sche_max， 且Δ＝10*log10(PRB_MAX/PRB_NUM)-10*log10(PRB_MAX/PRB_MAX_scheduled)；
步骤C、所述基站设备计算所述第二MCS等级MCSindex＝MCS_actual_a，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；
其中，MCS_init_noLimt(k0)为k0时刻按照单PRB期望功率水平发送对应的第一MCS等级，PRB_MAX_noLimt为终端设备按照单PRB期望功率水平发送功率为最大发送功率时调度的PRB数，MCS_diff为迭代计算终止的MCS差异门限，MCS_init_sche_max为调度最大PRB数为PRB_MAX_scheduled时能支持的MCS等级，PRB_MAX_scheduled为根据一定的MCS等级限制计算出来的能调度的最大PRB数，PRB_MAX为预设PRB数量，PRB_NUM为根据MCS_actual_b计算出来的传输用户数据需要的PRB数。
优选的，所述方法进一步包括：
所述基站设备根据所述第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算所述PRB_MAX_scheduled和所述MCS_init_sche_max。
优选的，所述基站设备根据所述第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算所述PRB_MAX_scheduled和所述MCS_init_sche_max的过程，具体包括：当MCSinit＜target_MCS时，所述基站设备计算需要限制当前调度的最大PRB数
Figure PCTCN2016076169-appb-000002
如果所述PRB_tmp＞＝PRB_MAX_noLimt，则计算PRB_MAX_scheduled＝PRB_tmp，MCS_init_sche_max＝target_MCS；如果PRB_tmp＜PRB_MAX_noLimt，则基站设备计算PRB_MAX_scheduled＝PRB_MAX_noLimt，基站设备计算MCS_init_noLimt(k0)＝MCS_init(k0)+PPUSCH_RE_max_noLimt-PPUSCH_RE_max，并且所述基站设备计算MCS_init_sche_max＝MCS_init_noLimt(k0)；
当MCSinit＞＝target_MCS时，所述基站设备计算PRB_MAX_scheduled＝PRB_MAX， 所述基站设备计算MCS_init_sche_max＝MCS_init(k0)；其中，MCS_init(k0)为k0时刻的第一MCS等级，PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
本发明实施例提供一种基站设备，所述基站设备具体包括：
第一计算模块，配置为根据k0时刻的探测参考信号SRS信号测量到的第一信号与干扰加噪声比SINR，计算物理上行共享信道PUSCH信号的第二SINR；
确定模块，配置为根据所述第二SINR确定第一调制编码方式MCS等级；
第二计算模块，配置为根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的物理资源块PRB数和实际使用的第二MCS等级。
优选的，所述第一计算模块，具体配置为根据所述第一SINR、SRS信号和PUSCH信号在单资源粒子RE的功率差异，计算所述PUSCH信号的第二SINR。
优选的，所述第一计算模块，进一步配置为利用如下公式计算所述PUSCH信号的第二SINR：
Figure PCTCN2016076169-appb-000003
其中，SINR’in(k0)为所述PUSCH信号的第二SINR，SINRin(k0)为所述第一SINR，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异。
优选的，所述第一计算模块，还配置为根据功率余量上报PHR参数和SRS参数，计算SRS信号和PUSCH信号在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
优选的，所述第一计算模块，进一步配置为当SRS信号的总发送功率未达到最大值，预设数量个PRB时PUSCH的总发送功率未达到最大值时，计算PPUSCH_RE_max-PSRS_RE＝-(PSRS_OFFSET+3)，计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；或者，
当SRS信号的总发送功率达到最大值，预设数量个PRB时PUSCH的总发送功率达到最大值时，计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(PRB_MAX)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
当SRS信号的总发送功率未达到最大数值，并且预设数量个PRB时PUSCH的总发送功率达到最大数值时，则计算PPUSCH_RE_max-PSRS_RE＝PH(i)+10log10(MPUSCH)-10log10(PRB_MAX)-(PSRS_OFFSET+3)，并计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
当SRS信号的总发送功率达到最大数值，并且预设数量个PRB时PUSCH的总发送功率未达到最大数值时，则计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(MPUSCH(i))-PH(i)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；
其中，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异；PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异；PSRS_OFFSET为SRS信号的功率偏移；MSRS为SRS信号的带宽；PRB_MAX为预设数量；MPUSCH(i)为时刻i携带终端设备的PHR的PUSCH的PRB数；PH(i)为时刻i终端设备上报的PHR。
优选的，所述第二计算模块，具体配置为按照如下步骤计算实际调度的PRB数和实际使用的第二MCS等级：步骤A、根据MCS_init_noLimt(k0)和PRB_MAX_noLimt计算能够支持的最大传输块大小TBS，如果用户实际需要传输的数据量小于等于所述最大TBS，则计算所述第二MCS等级MCSindex为MCS_init_noLimt(k0)，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；如果用户实际需要传输的数据量大于所述最大TBS，则执行步骤B；
步骤B、获得MCS_actual_b，并计算MCS_actual_a＝MCS_actual_b+Δ；如果 (MCS_actual_a-MCS_actual_b)≤MCS_diff，执行步骤C；否则，计算MCS_actual_b＝MCS_actual_a，重复步骤B；MCS_actual_b初始值为MCS_init_sche_max，且Δ＝10*log10(PRB_MAX/PRB_NUM)-10*log10(PRB_MAX/PRB_MAX_scheduled)；
步骤C、计算所述第二MCS等级MCSindex＝MCS_actual_a，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；
其中，MCS_init_noLimt(k0)为k0时刻按照单PRB期望功率水平发送对应的第一MCS等级，PRB_MAX_noLimt为终端设备按照单PRB期望功率水平发送功率为最大发送功率时调度的PRB数，MCS_diff为迭代计算终止的MCS差异门限，MCS_init_sche_max为调度最大PRB数为PRB_MAX_scheduled时能支持的MCS等级，PRB_MAX_scheduled为根据一定的MCS等级限制计算出来的能调度的最大PRB数，PRB_MAX为预设PRB数量，PRB_NUM为根据MCS_actual_b计算出来的传输用户数据需要的PRB数。
优选的，所述第二计算模块，还配置为根据第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算所述PRB_MAX_scheduled和所述MCS_init_sche_max。
优选的，所述第二计算模块，进一步配置为当MCSinit＜target_MCS时，计算需要限制当前调度的最大PRB数
Figure PCTCN2016076169-appb-000004
如果所述PRB_tmp＞＝PRB_MAX_noLimt，则计算PRB_MAX_scheduled＝PRB_tmp，MCS_init_sche_max＝target_MCS；如果PRB_tmp＜PRB_MAX_noLimt，则计算PRB_MAX_scheduled＝PRB_MAX_noLimt，并计算MCS_init_noLimt(k0)＝MCS_init(k0)+PPUSCH_RE_max_noLimt-PPUSCH_RE_max，并计算MCS_init_sche_max＝MCS_init_noLimt(k0)；
当MCSinit＞＝target_MCS时，计算PRB_MAX_scheduled＝PRB_MAX，并计算 MCS_init_sche_max＝MCS_init(k0)；其中，MCS_init(k0)为k0时刻的第一MCS等级，PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
为了解决上述问题，本发明实施例还公开了一种计算机程序，包括计算机可读代码，当所述计算机可读代码在基站上运行时，导致所述基站设备执行权利要求书中的任一个所述的调制编码方式MCS等级的确定方法。
为了解决上述问题，本发明实施例还公开了一种计算机可读介质，其中存储了权利要求书中要求保护的所述计算机程序。
与现有技术相比，本发明实施例至少具有以下优点：本发明实施例中，在计算PUSCH的MCS时，考虑了PRB数和终端设备的发送功率信息，精确计算出调度一定PRB数的PUSCH对应的MCS等级，使得PUSCH的MCS等级与PUSCH信道的实际SINR相匹配，避免现有技术中存在的终端设备发送功率受限时SRS和PUSCH的PRB数不一致导致SINR不同但是调度MCS相同的问题，也解决了终端设备发送功率受限时调度不同PRB数的PUSCH对应SINR不同但是调度MCS相同的问题，有效保证了PUSCH的接收性能，从而提高了LTE系统的上行传输效率。进一步的，由于一般小区边缘用户容易出现上行发送功率受限的情况，而本方案专门解决了这种情况下可能出现的PUSCH的MCS选择不合适的问题，本方案尤其有利于提高小区边缘用户的上行传输效率。进一步的，本方案限制了上行调度的最低MCS等级，同时在这种情况下减少了最大可调度PRB数，保证了小区边缘、路损较大用户的PUSCH传输性能，避免由于调度PRB数过多、单PRB的SINR过低导致的PUSCH全部译码错的问题，有利于提高了边缘用户的上行业务速率。
附图说明
为了更加清楚地说明本发明实施例的技术方案，下面将对本发明实施例 描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据本发明实施例的这些附图获得其他的附图。
图1是本发明实施例一提供的一种MCS等级的确定方法流程示意图；
图2是本发明实施例二提供的一种基站设备的结构示意图；
图3是根据本发明实施例的一种用于执行调制编码方式MCS等级的确定方法的基站的结构框图；
图4是根据本发明实施例的一种用于保持或者携带实现调制编码方式MCS等级的确定方法的程序代码的存储单元。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
针对现有技术中存在的问题，本发明实施例一提供一种MCS等级的确定方法，以提出一种准确估计上行调度MCS以及对应的PRB数的方法。在描述本发明实施例的具体技术方案之前，可以定义如下相关参数。PRB_MAX：基站设备能够调度的最大PRB数，建议值为96。PH(i)：时刻i终端设备上报的PHR(Power Headroom Reporting，功率余量上报)。MPUSCH(i)：时刻i携带的终端设备的PHR信息的PUSCH的PRB数。MSRS：SRS的带宽(即PRB数)。PSRS_OFFSET：SRS的功率偏移，该数值为配置参数。PRB_MAX_noLimt：终端设备的发送功率为PCMAX(最大发送功率)时调度的PRB数。PSRS_RE：SRS信号的单RE(Resource Element，资源粒子)的发送功率。PPUSCH_RE_phr：基站设 备调度PRB数为MPUSCH(i)时的单RE的发送功率。PPUSCH_RE_max：基站设备调度PRB数为PRB_MAX时的单RE的发送功率。PPUSCH_RE_max_noLimt：功率刚好受到限制时，PUSCH的单RE的发送功率，即终端设备按照期望功率发送PUSCH时，单RE的发送功率。MCSinit：基站设备调度PRB数为PRB_MAX时对应的MCS等级。PRB_MAX_scheduled：基站设备根据实际的MCS等级能够调度的最大PRB数。MCS_init_sche_max：基站设备调度最大PRB数为PRB_MAX_scheduled时能够支持的MCS等级。PRB_scheduled：基站设备根据终端设备的波数和MCS等级实际调度的PRB数。MCS_diff：迭代计算终止的MCS差异门限。
在上述应用场景下，如图1所示，该MCS等级的确定方法包括以下步骤：
步骤101，基站设备根据k0时刻的SRS信号测量得到的第一SINR(如SINRin(k0))，计算PUSCH信号(PRB_MAX个PRB)的第二SINR(如SINRin(k0))。
在本发明实施例中，基站设备根据k0时刻的SRS信号测量得到的第一SINR(如SINRin(k0))，计算PUSCH信号(PRB_MAX个PRB)的第二SINR(如SINR’in(k0))的过程，具体包括但不限于：基站设备根据第一SINR、以及SRS信号和PUSCH信号在单RE的功率差异，计算PUSCH信号的第二SINR。
具体的，基站设备根据第一SINR、SRS信号和PUSCH信号在单RE的功率差异，计算PUSCH信号的第二SINR的过程，具体包括：基站设备利用如下公式计算PUSCH信号的第二SINR：
Figure PCTCN2016076169-appb-000005
其中，SINR’in(k0)为PUSCH信号的第二SINR，SINRin(k0)为第一SINR，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异。
本发明实施例中，在执行步骤101之前，基站设备还可以根据PHR参数以及SRS参数，计算SRS信号和PUSCH信号(PRB数为PRB_MAX)在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量 (PRB_MAX)个PRB的PUSCH时在单RE的功率差异。其中，上述计算过程可以仅在SRS上报时刻计算，且PHR采用最近一次上报的PHR值。
在本发明实施例中，基站设备根据PHR参数以及SRS参数，计算SRS信号和PUSCH信号(PRB数为PRB_MAX)在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量(PRB_MAX)个PRB的PUSCH时在单RE的功率差异的过程，具体包括但不限于如下情况：
情况一、当SRS信号的总发送功率未达到最大数值，并且预设数量(即PRB_MAX)个PRB时PUSCH的总发送功率未达到最大数值时，即PH(i)≥10log10(MSRS)+PSRS_OFFSET-10log10(MPUSCH(i))，并且PH(i)≥10log10(PRB_MAX)-10log10(MPUSCH(i))时，则基站设备计算PPUSCH_RE_max-PSRS_RE＝-(PSRS_OFFSET+3)，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0。
情况二、当SRS信号的总发送功率达到最大数值，并且预设数量(即PRB_MAX)个PRB时PUSCH的总发送功率达到最大数值时，即PH(i)＜10log10(MSRS)+PSRS_OFFSET-10log10(MPUSCH(i))，并且PH(i)＜10log10(PRB_MAX)-10log10(MPUSCH(i))时，则基站设备计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(PRB_MAX)-3，并计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)。进一步的，当PUSCH的发送功率刚刚达到最大数值时，则基站设备还可以计算PRB数为PRB_MAX_noLimt＝MPUSCH(i)·10PH(i)/10。
情况三、当SRS信号的总发送功率未达到最大数值，并且预设数量(即PRB_MAX)个PRB时PUSCH的总发送功率达到最大数值时，即PH(i)≥10log10(MSRS)+PSRS_OFFSET-10log10(MPUSCH(i))，并且PH(i)＜10log10(PRB_MAX)-10log10(MPUSCH(i))时，则基站设备计算 PPUSCH_RE_max-PSRS_RE＝PH(i)+10log10(MPUSCH)-10log10(PRB_MAX)-(PSRS_OFFSET+3)，计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)。进一步的，当PUSCH的发送功率刚刚达到最大数值时，则基站设备还可以计算PRB数为PRB_MAX_noLimt＝MPUSCH(i)·10PH(i)/10。
情况四、当SRS信号的总发送功率达到最大数值，并且预设数量(即PRB_MAX)个PRB时PUSCH的总发送功率未达到最大数值时，即PH(i)＜10log10(MSRS)+PSRS_OFFSET-10log10(MPUSCH(i))，并且PH(i)≥10log10(PRB_MAX)-10log10(MPUSCH(i))时，则基站设备计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(MPUSCH(i))-PH(i)-3，并且基站设备计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0。
本发明实施例中，在上述四种具体情况下，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异；PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量(即PRB_MAX)个PRB的PUSCH时在单RE的功率差异；PSRS_OFFSET为SRS信号的功率偏移；MSRS为SRS信号的带宽；PRB_MAX为预设数量；MPUSCH(i)为时刻i携带终端设备的PHR的PUSCH的PRB数；PH(i)为时刻i终端设备上报的PHR。
步骤102，基站设备根据PUSCH信号的第二SINR确定第一MCS等级，即根据PUSCH(PRB_MAX个PRB)的SINR’in(k0)确定调度MCS等级MCSinit。
步骤103，基站设备根据第一MCS等级和用户实际需要传输的数据量，计算实际调度的PRB数(PRB_scheduled)和实际使用的第二MCS等级(MCSindex)。
本发明实施例中，基站设备根据第一MCS等级和用户实际需要传输的数据量，计算实际调度的PRB数和实际使用的第二MCS等级的过程，包括：
步骤A、基站设备根据MCS_init_noLimt(k0)和PRB_MAX_noLimt计算能够支持的最大TBS(Transport Block Size，传输块大小)，如果用户实际需要传输的数据量小于等于该最大TBS，则基站设备计算第二MCS等级MCSindex为MCS_init_noLimt(k0)，并根据第二MCS等级计算得到实际调度所需的PRB数，并结束流程；如果用户实际需要传输的数据量大于最大该TBS，则执行步骤B。
步骤B、基站设备获得MCS_actual_b，计算MCS_actual_a＝MCS_actual_b+Δ；如果(MCS_actual_a-MCS_actual_b)≤MCS_diff，执行步骤C；否则，基站设备计算MCS_actual_b＝MCS_actual_a，重复步骤B；MCS_actual_b初始值为MCS_init_sche_max，且Δ＝10*log10(PRB_MAX/PRB_NUM)-10*log10(PRB_MAX/PRB_MAX_scheduled)。
步骤C、基站设备计算第二MCS等级MCSindex＝MCS_actual_a，并根据第二MCS等级计算得到实际调度所需的PRB数PRB_scheduled，并结束流程。
其中，令初始MCS等级MCS_actual_b＝MCS_init_sche_max，并计算传输用户数据需要的PRB数，记为PRB_NUM，此时PRB_NUM＝min(PRB_NUM，PRB_MAX_scheduled)。此外，MCS_init_noLimt(k0)为k0时刻按照单PRB期望功率水平发送对应的第一MCS等级，PRB_MAX_noLimt为终端设备按照单PRB期望功率水平发送功率为最大发送功率时调度的PRB数，MCS_diff为迭代计算终止的MCS差异门限，MCS_init_sche_max为调度最大PRB数为PRB_MAX_scheduled时能支持的MCS等级，PRB_MAX_scheduled为根据一定的MCS等级限制计算出来的能调度的最大PRB数，PRB_MAX为预设PRB数量，PRB_NUM为根据MCS_actual_b计算出来的传输用户数据需要的PRB数。
本发明实施例中，基站设备还可以根据第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算PRB_MAX_scheduled和MCS_init_sche_max。
具体的，由于过低的MCS等级不利于提升系统传输效率，因此限制调度最小MCS等级为target_MCS，根据第一MCS等级MCSinit和预先配置的最小MCS 等级target_MCS，计算可调度的最大PRB数PRB_MAX_scheduled和调度最大PRB数时的MCS等级MCS_init_sche_max。如果终端设备当前期望功率水平达不到target_MCS，以终端设备当前期望功率水平的MCS等级作为MCS_init_sche_max。
本发明实施例中，基站设备根据第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算可调度的最大PRB数PRB_MAX_scheduled和调度最大PRB数时的MCS等级MCS_init_sche_max的过程，具体包括但不限于如下方式：
当MCSinit＜target_MCS时，基站设备计算需要限制当前调度的最大PRB数
Figure PCTCN2016076169-appb-000006
如果PRB_tmp＞＝PRB_MAX_noLimt，则基站设备计算PRB_MAX_scheduled＝PRB_tmp，MCS_init_sche_max＝target_MCS；如果PRB_tmp＜PRB_MAX_noLimt，则基站设备计算PRB_MAX_scheduled＝PRB_MAX_noLimt，计算MCS_init_noLimt(k0)＝MCS_init(k0)+PPUSCH_RE_max_noLimt-PPUSCH_RE_max，并且基站设备计算MCS_init_sche_max＝MCS_init_noLimt(k0)。
当MCSinit＞＝target_MCS时，基站设备计算PRB_MAX_scheduled＝PRB_MAX，并计算MCS_init_sche_max＝MCS_init(k0)。其中，MCS_init(k0)为k0时刻的第一MCS等级，PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
综上所述，本发明实施例中，在根据SRS信号的接收信噪比确定PUSCH信号的接收信噪比时，考虑了PUSCH的PRB数和SRS的PRB数的差异，折算成PUSCH发送功率对应的SINR；由于上行每TTI(Transmission Time Interval，传输时间间隔)调度PUSCH的PRB数都会发生变化，固定按照PUSCH调度最大PRB数(此处定义为PRB_MAX)计算可以支持的MCS等级，作为调度时的初始MCS等级，即初始调度MCS是和最大调度PUSCH的PRB数对应，是以最大调度PUSCH PRB数作为基准估计出的MCS，而用户最终 实际调度MCS也是根据当时用户实际传输的PRB数来确定的。由于过低的MCS等级不利于提升系统的传输效率，因此限制调度的最小MCS等级，如果初始MCS等级小于最小MCS等级，则重新计算初始调度MCS，如果期望功率允许的话，设置初始MCS为最小MCS等级限制，同时减少可调度最大PRB数。用户调度时先根据初始MCS等级和待传数据量计算需要的PRB数，如果需要的PRB数较小，PUSCH单PRB功率可能会发生变化，即可调度MCS等级会发生变化，则重新根据新的MCS等级继续计算需要的PRB数，如此迭代计算，最终获得传输数据最合适的MCS等级和PRB数。
与现有技术相比，本发明实施例至少具有以下优点：本发明实施例中，在计算PUSCH的MCS时，考虑了PRB数和终端设备的发送功率信息，精确计算出调度一定PRB数的PUSCH对应的MCS等级，使得PUSCH的MCS等级与PUSCH信道的实际SINR相匹配，避免现有技术中存在的终端设备发送功率受限时SRS和PUSCH的PRB数不一致导致SINR不同但是调度MCS相同的问题，也解决了终端设备发送功率受限时调度不同PRB数的PUSCH对应SINR不同但是调度MCS相同的问题，有效保证了PUSCH的接收性能，从而提高了LTE系统的上行传输效率。进一步的，由于一般小区边缘用户容易出现上行发送功率受限的情况，而本方案专门解决了这种情况下可能出现的PUSCH的MCS选择不合适的问题，本方案尤其有利于提高小区边缘用户的上行传输效率。进一步的，本方案限制了上行调度的最低MCS等级，同时在这种情况下减少了最大可调度PRB数，保证了小区边缘、路损较大用户的PUSCH传输性能，避免由于调度PRB数过多、单PRB的SINR过低导致的PUSCH全部译码错的问题，有利于提高了边缘用户的上行业务速率。
实施例二
基于与上述方法同样的发明构思，本发明实施例中还提供了一种基站设备，如图2所示，所述基站设备具体包括：
第一计算模块11，配置为根据k0时刻的SRS信号测量到的第一信号与干扰加噪声比SINR，计算物理上行共享信道PUSCH信号的第二SINR；
确定模块12，配置为根据所述第二SINR确定第一调制编码方式MCS等级；
第二计算模块13，配置为根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的物理资源块PRB数和实际使用的第二MCS等级。
所述第一计算模块11，具体配置为根据所述第一SINR、SRS信号和PUSCH信号在单资源粒子RE的功率差异，计算所述PUSCH信号的第二SINR。
所述第一计算模块11，进一步配置为利用如下公式计算所述PUSCH信号的第二SINR：
Figure PCTCN2016076169-appb-000007
其中，SINR’in(k0)为所述PUSCH信号的第二SINR，SINRin(k0)为所述第一SINR，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异。
所述第一计算模块11，还配置为根据功率余量上报PHR参数和SRS参数，计算SRS信号和PUSCH信号在单RE的功率差异，计算终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
所述第一计算模块11，进一步配置为当SRS信号的总发送功率未达到最大值，预设数量个PRB时PUSCH的总发送功率未达到最大值时，计算PPUSCH_RE_max-PSRS_RE＝-(PSRS_OFFSET+3)，计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；或者，
当SRS信号的总发送功率达到最大值，预设数量个PRB时PUSCH的总发送功率达到最大值时，计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(PRB_MAX)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
当SRS信号的总发送功率未达到最大数值，并且预设数量个PRB时 PUSCH的总发送功率达到最大数值时，则计算PPUSCH_RE_max-PSRS_RE＝PH(i)+10log10(MPUSCH)-10log10(PRB_MAX)-(PSRS_OFFSET+3)，并计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
当SRS信号的总发送功率达到最大数值，并且预设数量个PRB时PUSCH的总发送功率未达到最大数值时，则计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(MPUSCH(i))-PH(i)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；
其中，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异；PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异；PSRS_OFFSET为SRS信号的功率偏移；MSRS为SRS信号的带宽；PRB_MAX为预设数量；MPUSCH(i)为时刻i携带终端设备的PHR的PUSCH的PRB数；PH(i)为时刻i终端设备上报的PHR。
所述第二计算模块13，具体配置为按照如下步骤计算实际调度的PRB数和实际使用的第二MCS等级：步骤A、根据MCS_init_noLimt(k0)和PRB_MAX_noLimt计算能够支持的最大传输块大小TBS，如果用户实际需要传输的数据量小于等于所述最大TBS，则计算所述第二MCS等级MCSindex为MCS_init_noLimt(k0)，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；如果用户实际需要传输的数据量大于所述最大TBS，则执行步骤B；
步骤B、获得MCS_actual_b，并计算MCS_actual_a＝MCS_actual_b+Δ；如果(MCS_actual_a-MCS_actual_b)≤MCS_diff，执行步骤C；否则，计算MCS_actual_b＝MCS_actual_a，重复步骤B；MCS_actual_b初始值为MCS_init_sche_max，且Δ＝10*log10(PRB_MAX/PRB_NUM)-10*log10(PRB_MAX/PRB_MAX_scheduled)；
步骤C、计算所述第二MCS等级MCSindex＝MCS_actual_a，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；
其中，MCS_init_noLimt(k0)为k0时刻按照单PRB期望功率水平发送对应的第一MCS等级，PRB_MAX_noLimt为终端设备按照单PRB期望功率水平发送功率为最大发送功率时调度的PRB数，MCS_diff为迭代计算终止的MCS差异门限，MCS_init_sche_max为调度最大PRB数为PRB_MAX_scheduled时能支持的MCS等级，PRB_MAX_scheduled为根据一定的MCS等级限制计算出来的能调度的最大PRB数，PRB_MAX为预设PRB数量，PRB_NUM为根据MCS_actual_b计算出来的传输用户数据需要的PRB数。
所述第二计算模块13，还配置为根据第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算所述PRB_MAX_scheduled和所述MCS_init_sche_max。
所述第二计算模块13，进一步配置为当MCSinit＜target_MCS时，计算需要限制当前调度的最大PRB数
Figure PCTCN2016076169-appb-000008
如果所述PRB_tmp＞＝PRB_MAX_noLimt，则计算PRB_MAX_scheduled＝PRB_tmp，MCS_init_sche_max＝target_MCS；如果PRB_tmp＜PRB_MAX_noLimt，则计算PRB_MAX_scheduled＝PRB_MAX_noLimt，并计算MCS_init_noLimt(k0)＝MCS_init(k0)+PPUSCH_RE_max_noLimt-PPUSCH_RE_max，并计算MCS_init_sche_max＝MCS_init_noLimt(k0)；
当MCSinit＞＝target_MCS时，计算PRB_MAX_scheduled＝PRB_MAX，并计算MCS_init_sche_max＝MCS_init(k0)；其中，MCS_init(k0)为k0时刻的第一MCS等级，PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
其中，本发明装置的各个模块可以集成于一体，也可以分离部署。上述 模块可以合并为一个模块，也可以进一步拆分成多个子模块。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到本发明可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。本领域技术人员可以理解附图只是一个优选实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的。本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描述进行分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。以上公开的仅为本发明的几个具体实施例，但是，本发明并非局限于此，任何本领域的技术人员能思之的变化都应落入本发明的保护范围。
在此提供的算法和显示不与任何特定计算机、虚拟系统或者其它设备固有相关。各种通用系统也可以与基于在此的示教一起使用。根据上面的描述，构造这类系统所要求的结构是显而易见的。此外，本发明也不针对任何特定编程语言。应当明白，可以利用各种编程语言实现在此描述的本发明的内容，并且上面对特定语言所做的描述是为了披露本发明的最佳实施方式。
在此处所提供的说明书中，说明了大量具体细节。然而，能够理解，本发明的实施例可以在没有这些具体细节的情况下实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。
类似地，应当理解，为了精简本公开并帮助理解各个发明方面中的一个或多个，在上面对本发明的示例性实施例的描述中，本发明的各个特征有时 被一起分组到单个实施例、图、或者对其的描述中。然而，并不应将该公开的方法解释成反映如下意图：即所要求保护的本发明要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说，如下面的权利要求书所反映的那样，发明方面在于少于前面公开的单个实施例的所有特征。因此，遵循具体实施方式的权利要求书由此明确地并入该具体实施方式，其中每个权利要求本身都作为本发明的单独实施例。
本领域那些技术人员可以理解，可以对实施例中的设备中的模块进行自适应性地改变并且把它们设置在与该实施例不同的一个或多个设备中。可以把实施例中的模块或单元或组件组合成一个模块或单元或组件，以及此外可以把它们分成多个子模块或子单元或子组件。除了这样的特征和/或过程或者单元中的至少一些是相互排斥之外，可以采用任何组合对本说明书(包括伴随的权利要求、摘要和附图)中公开的所有特征以及如此公开的任何方法或者设备的所有过程或单元进行组合。除非另外明确陈述，本说明书(包括伴随的权利要求、摘要和附图)中公开的每个特征可以由提供相同、等同或相似目的的替代特征来代替。
此外，本领域的技术人员能够理解，尽管在此所述的一些实施例包括其它实施例中所包括的某些特征而不是其它特征，但是不同实施例的特征的组合意味着处于本发明的范围之内并且形成不同的实施例。例如，在下面的权利要求书中，所要求保护的实施例的任意之一都可以以任意的组合方式来使用。
本发明的各个部件实施例可以以硬件实现，或者以在一个或者多个处理器上运行的软件模块实现，或者以它们的组合实现。本领域的技术人员应当理解，可以在实践中使用微处理器或者数字信号处理器(DSP)来实现根据本发明实施例的上行频选调度的设备中的一些或者全部部件的一些或者全部功能。本发明还可以实现为用于执行这里所描述的方法的一部分或者全部的设 备或者装置程序(例如，计算机程序和计算机程序产品)。这样的实现本发明的程序可以存储在计算机可读介质上，或者可以具有一个或者多个信号的形式。这样的信号可以从因特网网站上下载得到，或者在载体信号上提供，或者以任何其他形式提供。
例如，图3示出了用于执行根据本发明实施例的调制编码方式MCS等级的确定方法的基站的结构框图。该基站传统上包括处理器310和以存储器320形式的计算机程序产品或者计算机可读介质。存储器320可以是诸如闪存、EEPROM(电可擦除可编程只读存储器)、EPROM、硬盘或者ROM之类的电子存储器。存储器320具有用于执行上述方法中的任何方法步骤的程序代码331的存储空间330。例如，用于程序代码的存储空间330可以包括分别用于实现上面的方法中的各种步骤的各个程序代码331。这些程序代码可以从一个或者多个计算机程序产品中读出或者写入到这一个或者多个计算机程序产品中。这些计算机程序产品包括诸如硬盘，紧致盘(CD)、存储卡或者软盘之类的程序代码载体。这样的计算机程序产品通常为如参考图4所述的便携式或者固定存储单元。该存储单元可以具有与图3的基站中的存储器320类似布置的存储段、存储空间等。程序代码可以例如以适当形式进行压缩。通常，存储单元包括计算机可读代码331’，即可以由例如诸如310之类的处理器读取的代码，这些代码当由基站运行时，导致该基站执行上面所描述的方法中的各个步骤。
本文中所称的“一个实施例”、“实施例”或者“一个或者多个实施例”意味着，结合实施例描述的特定特征、结构或者特性包括在本发明的至少一个实施例中。此外，请注意，这里“在一个实施例中”的词语例子不一定全指同一个实施例。
以上对本发明实施例所提供的一种调制编码方式MCS等级的确定方法和基站设备，进行了详细介绍，本文中应用了具体个例对本发明实施例的原理 及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明实施例的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明实施例的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明实施例的限制。

Claims (18)

  1. 一种调制编码方式MCS等级的确定方法，该方法包括：
    基站设备根据k0时刻的探测参考信号SRS信号测量得到的第一信号与干扰加噪声比SINR，计算物理上行共享信道PUSCH信号的第二SINR；
    所述基站设备根据所述PUSCH信号的第二SINR确定第一MCS等级；
    所述基站设备根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的物理资源块PRB数和实际使用的第二MCS等级。
  2. 如权利要求1所述的方法，其中，所述基站设备根据k0时刻的探测参考信号SRS信号测量得到的第一信号与干扰加噪声比SINR，计算物理上行共享信道PUSCH信号的第二SINR的过程，具体包括：
    所述基站设备根据所述第一SINR、以及SRS信号和PUSCH信号在单资源粒子RE的功率差异，计算所述PUSCH信号的第二SINR。
  3. 如权利要求2所述的方法，其中，所述基站设备根据所述第一SINR、以及SRS信号和PUSCH信号在单资源粒子RE的功率差异，计算所述PUSCH信号的第二SINR的过程，具体包括：
    所述基站设备利用如下公式计算所述PUSCH信号的第二SINR：
    Figure PCTCN2016076169-appb-100001
    其中，SINR′in(k0)为所述PUSCH信号的第二SINR，SINRin(k0)为所述第一SINR，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异。
  4. 如权利要求2所述的方法，其中，所述方法进一步包括：
    所述基站设备根据功率佘量上报PHR参数以及SRS参数，计算SRS信号和PUSCH信号在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
  5. 如权利要求4所述的方法，其中，所述基站设备根据功率佘量上报PHR参数以及SRS参数，计算SRS信号和PUSCH信号在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的 PUSCH时在单RE的功率差异的过程，具体包括：
    当SRS信号的总发送功率未达到最大值，预设数量个PRB时PUSCH的总发送功率未达到最大值时，所述基站设备计算PPUSCH_RE_max-PSRS_RE＝-(PSRS_OFFSET+3)，所述基站设备计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；或者，
    当SRS信号的总发送功率达到最大值，预设数量个PRB时PUSCH的总发送功率达到最大值时，基站设备计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(PRB_MAX)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
    当SRS信号的总发送功率未达到最大数值，并且预设数量个PRB时PUSCH的总发送功率达到最大数值时，则所述基站设备计算PPUSCH_RE_max-PSRS_RE＝PH(i)+10log10(MPUSCH)-10log10(PRB_MAX)-(PSRS_OFFSET+3)，并计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
    当SRS信号的总发送功率达到最大数值，并且预设数量个PRB时PUSCH的总发送功率未达到最大数值时，则所述基站设备计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(MPUSCH(i))-PH(i)-3，PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；
    其中，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异；PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异；PSRS_OFFSET为SRS信号的功率偏移；MSRS为SRS信号的带宽；PRB_MAX为预设数量；MPUSCH(i)为时刻i携带终端设备的PHR的PUSCH的PRB数；PH(i)为时刻i终端设备上报的PHR。
  6. 如权利要求1所述的方法，其中，所述基站设备根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的物理资源块PRB数和实际使用的第二MCS等级的过程，具体包括：
    步骤A、所述基站设备根据MCS_init_noLimt(k0)和PRB_MAX_noLimt计算能够支持的最大传输块大小TBS，如果用户实际需要传输的数据量小于等于所述最 大TBS，则所述基站设备计算所述第二MCS等级MCSindex为MCS_init_noLimt(k0)，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；如果用户实际需要传输的数据量大于所述最大TBS，则执行步骤B；
    步骤B、所述基站设备获得MCS_actual_b，计算MCS_actual_a＝MCS_actual_b+Δ；如果(MCS_actual_a-MCS_actual_b)≤MCS_diff，执行步骤C；否则，所述基站设备计算MCS_actual_b＝MCS_actual_a，重复步骤B；MCS_actual_b初始值为MCS_init_sche_max，且Δ＝10*log10(PRB_MAX/PRB_NUM)-10*log10(PRB_MAX/PRB_MAX_scheduled)；
    步骤C、所述基站设备计算所述第二MCS等级MCSindex＝MCS_actual_a，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；
    其中，MCS_init_noLimt(k0)为k0时刻按照单PRB期望功率水平发送对应的第一MCS等级，PRB_MAX_noLimt为终端设备按照单PRB期望功率水平发送功率为最大发送功率时调度的PRB数，MCSdiff为迭代计算终止的MCS差异门限，MCS_init_sche_max为调度最大PRB数为PRB_MAX_scheduled时能支持的MCS等级，PRB_MAX_scheduled为根据一定的MCS等级限制计算出来的能调度的最大PRB数，PRB_MAX为预设PRB数量，PRB_NUM为根据MCS_actual_b计算出来的传输用户数据需要的PRB数。
  7. 如权利要求6所述的方法，其中，所述方法进一步包括：
    所述基站设备根据所述第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算所述PRB_MAX_scheduled和所述MCS_init_sche_max。
  8. 如权利要求7所述的方法，其中，所述基站设备根据所述第一MCS等级MCSinit和预先配置的最小MCS等级target_MCS，计算所述PRB_MAX_scheduled和所述MCS_init_sche_max的过程，具体包括：
    当MCSinit＜target_MCS时，所述基站设备计算需要限制当前调度的最大PRB 数
    Figure PCTCN2016076169-appb-100002
    如果所述PRB_tmp＞＝PRB_MAX_noLimt’则计算PRB_MAX_scheduled＝PRB_tmp，MCS_init_sche_max＝target_MCS；如果PRB_tmp＜PRB_MAX_noLimt，则基站设备计算PRB_MAX_scheduled＝PRB_MAX_noLimt，基站设备计算MCS_init_noLimt(k0)＝MCS_init(k0)+PPUSCH_RE_max_noLimt_PPUSCH_RE_max，并且所述基站设备计算MCS_init_sche_max＝MCS_init_noLimt(k0)；
    当MCSinit＞＝targetMCS时，所述基站设备计算PRB_MAX_scheduled＝PRB_MAX，所述基站设备计算MCS_init_sche_max＝MCS_init(k0)；其中，MCSinit(k0)为k0时刻的第一MCS等级，PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
  9. 一种基站设备，所述基站设备具体包括：
    第一计算模块，配置为根据k0时刻的探测参考信号SRS信号测量到的第一信号与干扰加噪声比SINR，计算物理上行共享信道PUSCH信号的第二SINR；
    确定模块，配置为根据所述第二SINR确定第一调制编码方式MCS等级；
    第二计算模块，配置为根据所述第一MCS等级和用户实际需要传输的数据量，计算实际调度的物理资源块PRB数和实际使用的第二MCS等级。
  10. 如权利要求9所述的基站设备，其中，
    所述第一计算模块，具体配置为根据所述第一SINR、SRS信号和PUSCH信号在单资源粒子RE的功率差异，计算所述PUSCH信号的第二SINR。
  11. 如权利要求10所述的基站设备，其中，
    所述第一计算模块，进一步配置为利用如下公式计算所述PUSCH信号的第二SINR：
    Figure PCTCN2016076169-appb-100003
    其中，SINRin(k0)为所述PUSCH信号的第二SINR，SINRin(k0)为所述第一 SINR，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异。
  12. 如权利要求10所述的基站设备，其中，
    所述第一计算模块，还配置为根据功率佘量上报PHR参数和SRS参数，计算SRS信号和PUSCH信号在单RE的功率差异，并计算终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
  13. 如权利要求12所述的基站设备，其中，
    所述第一计算模块，进一步配置为当SRS信号的总发送功率未达到最大值，预设数量个PRB时PUSCH的总发送功率未达到最大值时，计算PPUSCH_RE_max-PSRS_RE＝-(PSRS_OFFSET+3)，计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝0；或者，
    当SRS信号的总发送功率达到最大值，预设数量个PRB时PUSCH的总发送功率达到最大值时，计算PPUSCH_RE_max-PSRS_RE＝10log10(MSRS)-10log10(PRB_MAX)-3，PPUSCH_RE_max_noLimt-PPUSCHRE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
    当SRS信号的总发送功率未达到最大数值，并且预设数量个PRB时PUSCH的总发送功率达到最大数值时，则计算PPUSCH_RE_max-PSRS_PE＝PH(i)+10log10(MPUSCH)-10log10(PRB_MAX)-(PSRS_OFFSET+3)，并计算PPUSCH_RE_max_noLimt-PPUSCH_RE_max＝10log10(PRB_MAX)-10log10(MPUSCH(i))-PH(i)；或者，
    当SRS信号的总发送功率达到最大数值，并且预设数量个PRB时PUSCH的总发送功率未达到最大数值时，则计算PPUSHR_RE_max-PSRS_RE＝10log10(MSRS)-10log10(MPUSCH(i))-PH(i)-3PPUSCH_RE_max_noLint-PPUSCH_RE_max＝0；
    其中，PPUSCH_RE_max-PSRS_RE为SRS信号和PUSCH信号在单RE的功率差异；PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异；PSRS_OFFSET为SRS信号的 功率偏移；MSRS为SRS信号的带宽；PRB_MAX为预设数量；MPUSCH(i)为时刻i携带终端设备的PHR的PUSCH的PRB数；PH(i)为时刻i终端设备上报的PHR。
  14. 如权利要求9所述的基站设备，其中，所述第二计算模块，具体配置为按照如下步骤计算实际调度的PRB数和实际使用的第二MCS等级：
    步骤A、根据MCS_init_noLimt(k0)和PRB_MAX_noLimt计算能够支持的最大传输块大小TBS，如果用户实际需要传输的数据量小于等于所述最大TBS，则计算所述第二MCS等级MCSindex为MCS_init_noLimt(k0)，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；如果用户实际需要传输的数据量大于所述最大TBS，则执行步骤B；
    步骤B、获得MCS_actual_b，并计算MCS_actual_a＝MCS_actual_b+Δ；如果(MCS_actual_a-MCS_actual_b)≤MCS_diff，执行步骤C；否则，计算MCS_actual_b＝MCS_actual_a，重复步骤B；MCS_actual_b初始值为MCS_init_schemax，且Δ＝10*log10(PRB_MAX/PRB_NUM)-10*log10(PRB_MAX/PRB_MAX_scheduled)；
    步骤C、计算所述第二MCS等级MCSinsex＝MCS_actual_a，并根据所述第二MCS等级计算得到实际调度所需的PRB数，并结束流程；
    其中，MCS_init_nolimt(k0)为k0时刻按照单PRB期望功率水平发送对应的第一MCS等级，PRB_MAX_noLimt为终端设备按照单PRB期望功率水平发送功率为最大发送功率时调度的PRB数，MCS_diff为迭代计算终止的MCS差异门限，MCS_init_sche_max为调度最大PRB数为PRB_MAX_scheduled时能支持的MCS等级，PRB_MAX_scheduled为根据一定的MCS等级限制计算出来的能调度的最大PRB数，PRB_MAX为预设PRB数量，PRB_NUM为根据MCS_actual_b计算出来的传输用户数据需要的PRB数。
  15. 如权利要求14所述的基站设备，其中，
    所述第二计算模块，还配置为根据第一MCS等级MCSinit和预先配置的最 小MCS等级targrt_MCS，计算所述PRB_MAX_scheduled和所述MCS_init_sche_max。
  16. 如权利要求15所述的基站设备，其中，
    所述第二计算模块，进一步配置为当MCSinit＜target_MCS时，计算需要限制当前调度的最大PRB数
    Figure PCTCN2016076169-appb-100004
    如果所述PRB_tmp＞＝PRB_MAX_n0Limt，则计算PRB_MAX_Scheduled＝PRB_tmp，MCS_init_sche_max＝target_MCS；如果PRB_tmp＜PRB_MAX_noLimt，则计算PRB_MAX_scheduled＝PRB_MAX_noLimt，并计算MCS_init_noLimt(k0)＝MCS_init(k0)+PPUSCH_RE_max_noLimt-PPUSCH_RE_max，并计算MCS_init_Sche_max＝MCS_init_noLimt(k0)；
    当MCSinit＞＝target_MCS时，计算PRB_MAX_scheduled＝PRB_MAX，并计算MCS_init_sche_max＝MCS_init(k0)；其中，MCSinit(k0)为k0时刻的第一MCS等级，PPUSCH_RE_max_noLimt-PPUSCH_RE_max为终端设备在按照期望功率发送PUSCH时和发送预设数量个PRB的PUSCH时在单RE的功率差异。
  17. 一种计算机程序，包括计算机可读代码，当所述计算机可读代码在基站上运行时，导致所述基站执行根据权利要求1-8中的任一个所述的调制编码方式MCS等级的确定方法。
  18. 一种计算机可读介质，其中存储了如权利要求17所述的计算机程序。
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