CN103298088A - Resource scheduling method and device - Google Patents

Abstract

The invention discloses a resource scheduling method and a resource scheduling device, which are used for preventing the total transmitting power of each OFDM symbol of a PDSCH from exceeding the maximum transmitting power of a base station and ensuring the stability of base station equipment. The resource scheduling method provided by the invention comprises the following steps: determining the real-time transmitting power of each Orthogonal Frequency Division Multiplexing symbol of each subframe and the maximum output power of each antenna connector; and comparing the real-time transmitting power with the maximum output power, and scheduling power resources of the energy EPRE transmitted by each resource unit of the PDSCH according to the comparison result.

Description

A resource scheduling method and device

technical field

The present invention relates to the field of communication technologies, in particular to a resource scheduling method and device.

Background technique

In the LTE system, the total power of each Orthogonal Frequency Division Multiplex (OFDM) symbol on the Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) is all resource elements (Resource Element, RE ) sum of transmitting power:

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; sum</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; sf</span>}}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}$

为第i个成功分配资源用户所占用的功率，如下式所示：Among them, N _sf is the number of users successfully scheduled in each subframe, P _sum is the power sum of each OFDM symbol,

The power occupied by the i-th user who successfully allocates resources is shown in the following formula:

${\mathrm{<span\; class="notranslate">\; P</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 12</span>}<span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}<span\; class="notranslate">\; \_</span>{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}<span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CRS</span>}}<span\; class="notranslate">\; \&Center\; Dot;</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}^{\mathrm{<span\; class="notranslate">\; PRB</span>}}$

为第i个用户成功分配的PRB个数，P_CRS为每个小区专属参考符号的发射功率，为第i个用户在一个不包含RS的OFDM符号上PDSCH每个资源单元的发送能量(EPRE)与公共参考信号(Common Reference Signal，CRS)EPRE的比值。in,

is the number of PRBs successfully allocated to the i-th user, P _CRS is the transmission power of each cell-specific reference symbol, is the ratio of the transmission energy (EPRE) of each resource element of the PDSCH to the common reference signal (Common Reference Signal, CRS) EPRE of the i-th user on an OFDM symbol that does not include an RS.

It is assumed that the UE downlink cell-specific reference symbol EPRE remains constant in the entire downlink system bandwidth and in all subframes until it receives different cell-specific reference symbol power information. The downlink cell-specific reference symbol EPRE is derived from the transmission power of the downlink reference symbol, and is notified by the high-level parameter Reference-signal-power. The downlink reference symbol transmission power is defined as the linear average of the power on the downlink resource elements (REs) used to carry the cell-specific reference signal (cell-S RS) in all system bandwidths, and the unit is W.

For the ratio of PDSCH EPRE in the RE of PDSCH on each OFDM symbol (the EPRE of the unused PDSCH resource element is 0) to the cell-specific reference signal EPRE, use the definition of ρ _A or ρ _B corresponding to the OFDM symbol index, as shown in the following table 1, in addition, ρ _B /ρ _A is a UE cell-specific ratio.

Table 1: Cell-specific ratio ρ _B /ρ _A with 1, 2, 4 antenna ports

For a UE in transmission mode 8, and when the UE-specific reference signal (RS) is not mapped to the corresponding physical resource block (Physical Resource Block, PRB) of PDSCH, or mode 1-7, the UE assumes 16 quadrature amplitude modulation ( Quadrature Amplitude Modulation, QAM), 64QAM, spatial multiplexing with a refractive index (Reflective Index, RI ) > 1, or PDSCH transmission mode of multiple users multiple input multiple output (MultipleUsers MIMO, MU-MIMO):

When the UE receives precoded PDSCH data transmission using 4 cell-specific antenna port transmit diversity, ρ _A is equal to δ _power-offset + _PA +10log ₁₀ (2)[dB];

Others, ρ _A is equal to δ _power-offset + P _A [dB]

Among them, for other transmission modes except downlink MU-MIMO, δ _power-offset is 0dB, and the value of δ _power-offset for downlink MU-MIMO is shown in Table 2 below, and P _A is configured by high-layer signaling The UE-specific parameters of , the specific values are -6dB, -4.77dB, -3dB, -1.77dB, 0dB, 1dB, 2dB, 3dB.

Downlink power offset field (Downlink power offset field) δ _power-offset [dB] 0 -10log10(2) 1 0

Table 2: The mapping relationship between the downlink power offset field and the value of δ _power-offset in the downlink control information (Downlink Control Information, DCI) mode (format) 1D.

For transmission mode 7, if the UE-specific RS is on the PRB mapped to the PDSCH, the PDSCH EPRE in each OFDM symbol containing the UE-specific RS and the EPRE of the UE-specific RS are a fixed value, and this fixed value is included in the UE-specific RS. All symbols in the PRB of the RS are the same. In addition, the UE assumes that for 16QAM and 64QAM modulation modes, the ratio is also 0dB.

For transmission mode 8, if the UE-specific RS is on the PRB mapped to the PDSCH, the UE assumes that the PDSCH EPRE and UE-specific RS EPRE in each OFDM symbol containing the UE-specific RS are 0dB.

The UE assumes that the EPRE of the downlink configuration reference symbol is a constant value on the bandwidth of the configuration reference symbol and on all OFDM symbols including the configuration reference symbol in a given configuration reference symbol scenario.

The cell-specific ratio ρ _B /ρ _A is given in Table 1 above, and the specific ratio is configured according to the cell-specific parameter P _B notified by the upper layer and the number of antenna ports configured by the eNB.

When the 16QAM or 64QAM modulation mode is used for the physical multicast channel (PMCH), the UE assumes that the ratio of the PMCH EPRE to the EPRE of the Multicast Broadcast Single Frequency Network (MBSFN) is 0dB.

Table 3 The ratio ρ _A or ρ _B of PDSCH EPRE to cell-specific RS EPRE indicates different OFDM symbols in one time slot.

To sum up, the existing technology does not have a protection scheme for the dynamically adjusted power of the downlink physical shared channel PDSCH, that is, it does not consider whether the total power of each OFDM symbol after the dynamically adjusted power of the PDSCH will be greater than the maximum output power, resulting in If it exceeds the capability of the base station equipment, it may even damage the radio frequency device of the base station equipment.

Contents of the invention

The embodiment of the present invention provides a resource scheduling method and device, which are used to prevent the total transmission power on each OFDM symbol of the PDSCH from exceeding the maximum transmission power of the base station and ensure the stability of the base station equipment.

A resource scheduling method provided by an embodiment of the present invention includes:

Determine the real-time transmit power of each OFDM symbol of each subframe, and the maximum output power of each antenna connector;

The real-time transmission power is compared with the maximum output power, and the power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH is performed according to the comparison result.

A resource scheduling method provided by an embodiment of the present invention includes:

Counting the total power of users who have successfully allocated resources, and determining the remaining available power according to the total power and the maximum output power when it is determined that the total power is less than the preset maximum output power;

Determine the power value of each physical resource block PRB of the current user to be scheduled;

According to the remaining available power and the power value of each PRB of the current user to be scheduled, the number of PRBs allocated to the current user to be scheduled is determined.

A resource scheduling device provided by an embodiment of the present invention includes:

A determination unit, configured to determine the real-time transmit power of each OFDM symbol of each subframe, and the maximum output power of each antenna connector;

The comparison processing unit is configured to compare the real-time transmission power with the maximum output power, and perform power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH according to the comparison result.

A resource scheduling device provided by an embodiment of the present invention includes:

A statistical remaining available power unit, used to count the total power of users who have successfully allocated resources, and determine the remaining available power according to the total power and the maximum output power when it is determined that the total power is less than the preset maximum output power ;

A PRB power value determination unit, configured to determine the power value of each PRB of the current user to be scheduled;

The PRB number determination unit is configured to determine the number of PRBs allocated to the current user to be scheduled according to the remaining available power and the power value of each PRB of the current user to be scheduled.

In the embodiment of the present invention, determine the real-time transmit power of each OFDM symbol in each subframe, and the maximum output power of each antenna connector; compare the real-time transmit power with the maximum output power According to the comparison result, the power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH is performed, thereby avoiding that the total transmission power on each OFDM symbol of the PDSCH exceeds the maximum transmission power of the base station, and ensuring the power of the base station equipment stability.

Description of drawings

FIG. 1 is a schematic flowchart of a resource scheduling method provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a resource scheduling method provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a resource scheduling device provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a resource scheduling device provided by an embodiment of the present invention.

Detailed ways

The embodiment of the present invention provides a resource scheduling method and device, which are used to prevent the total transmission power on each OFDM symbol of the PDSCH from exceeding the maximum transmission power of the base station and ensure the stability of the base station equipment.

LTE downlink shared channel (PDSCH) power allocation is to control the transmission energy (EPRE) of various downlink physical shared channels in each resource unit according to the high-level configuration parameters. However, how to ensure that the transmission power of the downlink shared channel after configuring parameters is within Within the range allowed by the system, that is, how to ensure that the total power on one OFDM symbol is not greater than the maximum transmission power of the base station equipment is the technical problem to be solved by the present invention.

Referring to Fig. 1, a resource scheduling method provided by an embodiment of the present invention includes:

S101. Determine the real-time transmit power of each OFDM symbol in each subframe and the maximum output power of each antenna connector;

S102. Compare the real-time transmission power with the maximum output power, and perform power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH according to the comparison result.

Preferably, the power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH according to the comparison result includes:

When the real-time transmit power is less than or equal to the maximum output power, according to the value of the common reference signal CRS EPRE, the ratio ρ _B of PDSCH EPRE including CRS to CRS EPRE, and the ratio of PDSCH EPRE not including CRS to CRS EPRE ρ _A , to determine the power of the PDSCH EPRE.

Preferably, the power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH according to the comparison result includes:

When the real-time transmission power is greater than the maximum output power, determine the transmission power of each RE of the PDSCH as: (ρ _A · P _CRS )/β;

P_sum为所述实时发射功率，

为所述最大输出功率，ρ_A为不包含公共参考信号CRS的PDSCH EPRE与CRS EPRE的比值，P_CRS为每个小区专属参考符号的发射功率。in,

P _sum is the real-time transmit power,

is the maximum output power, ρ _A is the ratio of the PDSCH EPRE not including the common reference signal CRS to the CRS EPRE, and P _CRS is the transmission power of each cell-specific reference symbol.

Preferably, the power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH according to the comparison result includes:

When the real-time transmission power is greater than the maximum output power, determine the transmission power of each RE of the PDSCH as: (ρ _A · P _CRS )/β;

And, determine the transmit power of CRS as: P _CRS /β;

P_sum为所述实时发射功率，

为所述最大输出功率，ρ_A为不包含公共参考信号CRS的PDSCH EPRE与CRS EPRE的比值，P_CRS为每个小区专属参考符号的发射功率。in,

P _sum is the real-time transmit power,

is the maximum output power, ρ _A is the ratio of the PDSCH EPRE not including the common reference signal CRS to the CRS EPRE, and P _CRS is the transmission power of each cell-specific reference symbol.

Preferably, the power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH according to the comparison result includes:

When the real-time transmit power is greater than the maximum output power, it is determined that the resource allocation of some users whose resources have been successfully allocated currently fails.

Referring to FIG. 2, another resource scheduling method provided by an embodiment of the present invention includes:

S201. Count the total power P _allocated of users who have successfully allocated resources, and when it is determined that the total power P _allocated is less than the preset maximum output power, determine the remaining available power P _available according to the total power and the maximum output power ;

S202. Determine the power value of each PRB of the current user to be scheduled

确定为当前待调度用户分配的PRB个数。S203, according to the remaining available power P _available and the power value of each physical resource block PRB of the current user to be scheduled

Determine the number of PRBs allocated to the current user to be scheduled.

Preferably, the method also includes:

When it is determined that the total power is greater than or equal to the maximum output power, it is determined not to allocate resources to the current user to be scheduled.

Specific explanations are given below.

The embodiment of the present invention proposes a protection scheme for dynamically adjusted power of the downlink physical shared channel PDSCH, so that the dynamically adjusted total power of each OFDM symbol will not exceed the maximum transmit power limit of the device, ensuring the stability of the base station. The specific power protection scheme is based on the users scheduled in each subframe, the number of PRBs allocated to each user, and the power parameters PA and PB determined by the downlink power control module, and the total transmission power is counted in real time to ensure the transmission power of each OFDM symbol Do not exceed the maximum transmit power on the evolved base station (eNB) side, as follows:

基站侧的下行共享信道功率控制模块确定小区级参数PB、用户级参数PA，以及确定ρ_B、ρ_A，其中，ρ_A代表不包含CRS的PDSCH EPRE与CRS EPRE的比值，ρ_B代表包含CRS的PDSCH EPRE与CRS EPRE的比值。每个子帧的每个OFDM符号的实时功率统计为P_sum，确保P_sum不超过最大输出功率，且每个天线连接器的最大输出功率为

其中，

的具体取值详见36.104协议。It is known that the number N of scheduling users output by each subframe scheduling module in real time, the specific users are {ue ₀ , ue ₁ ,..., ue _i ,...ue _N-1 }, and the PRB allocated to each user is

The downlink shared channel power control module on the base station side determines the cell-level parameter PB, the user-level parameter PA, and determines ρ _B , ρ _A , where ρ _A represents the ratio of PDSCH EPRE without CRS to CRS EPRE, and ρ _B represents the ratio of CRS EPRE including CRS The ratio of PDSCH EPRE to CRS EPRE. The real-time power statistics of each OFDM symbol in each subframe is P _sum , ensuring that P _sum does not exceed the maximum output power, and the maximum output power of each antenna connector is

in,

For the specific value of , see protocol 36.104.

The specific method for determining the above parameters ρ _B and ρ _A can adopt the existing technology.

则依据CRS EPRE的值和ρ_B、ρ_A的取值，确定的PDSCHEPRE功率，来发送数据。like

The data is sent according to the determined PDSCHEPRE power based on the value of CRS EPRE and the values of ρ _B and ρ _A.

Among them, the value of CRS EPRE is a pre-configured default value.

则可以选择采取以下四种方案之一进行处理，具体描述如下：like

You can choose to take one of the following four options for processing, as described in detail below:

Option One:

那么：Assume β = calculated total power/total power, ie

So:

Base station side: The transmit power of each RE of PDSCH is (ρ _A ·P _CRS )/β, and P _CRS is the transmit power of each cell-specific reference symbol, that is, the transmit power of each RE is reduced by β times, because the EPRE of CRS remains unchanged, so the ratio of EPRE of PDSCH to EPRE of CRS changes.

UE side: Get the transmit power of each RE of PDSCH and the transmit power of CRS according to the high-level parameters, where the transmit power of each RE of PDSCH is ρ _A · P _CRS , and the EPRE of CRS remains unchanged, so the EPRE of PDSCH and CRS The EPRE ratio is unchanged.

Option II:

Assume β = calculated total power/total power, ie So,

On the base station side: the transmit power of each RE of the PDSCH is (ρ _A ·P _CRS )/β, and the transmit power of the CRS is P _CRS /β, then the ratio of the EPRE of the PDSCH to the EPRE of the CRS remains unchanged.

UE side: Get the transmit power of each RE of PDSCH and the transmit power of CRS according to the high-level parameters, where the transmit power of each RE of PDSCH is ρ _A · P _CRS , and the EPRE of CRS remains unchanged, so the EPRE of PDSCH and CRS The EPRE ratio is unchanged.

third solution:

It was determined that resource assignments failed for some of the users who are currently assigned resources successfully.

Option four:

Re-allocate resources to the current users to be scheduled.

Solution 4. Before allocating resources for each user, judge whether to allocate resources. That is, when allocating PRB resources to each user in a subframe, consider the limiting factor of the number of PRBs that can be supported by the remaining available power to ensure that each OFDM symbol The transmit power will not exceed the maximum transmit power. The specific steps are as follows:

Step 1: Use the following formula to calculate the total power P _allocated of users who have successfully allocated resources.

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; allocated</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}$

为第i个成功分配资源用户所占用的功率，如下式所示：Among them, N is the number of users who have successfully allocated resources,

The power occupied by the i-th user who successfully allocates resources is shown in the following formula:

${\mathrm{<span\; class="notranslate">\; P</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 12</span>}<span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}<span\; class="notranslate">\; \_</span>{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}<span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CRS</span>}}<span\; class="notranslate">\; \&Center\; Dot;</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}^{\mathrm{<span\; class="notranslate">\; PRB</span>}}$

为第i个用户成功分配的PRB个数。in,

The number of PRBs successfully allocated to the i-th user.

Step 2: Determine the maximum number of resources that can be allocated to user j with the remaining available power.

Assuming that the next scheduled user to be determined is ue _j , then, according to the remaining available power P _available and the power value of each PRB of ue _j , the number of available PRBs N _{power_available} allocated to ue _j is determined.

The remaining available power is:

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; available</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}^{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; p</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; allocated</span>}}$

The power value of each PRB of ue _j is as follows:

${\mathrm{<span\; class="notranslate">\; P</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; j</span>}}}^{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 12</span>}<span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; A</span>}<span\; class="notranslate">\; \_</span>{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; j</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CRS</span>}}$

The maximum number of PRBs available for ue _j is:

${\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; power</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; available</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; available</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{{\mathrm{<span\; class="notranslate">\; ue</span>}}_{\mathrm{<span\; class="notranslate">\; j</span>}}}^{\mathrm{<span\; class="notranslate">\; PRB</span>}}$

Step 3: Determine the number of PRBs allocated by the user.

According to the limitation of the available PRB number N _{power_available} of the ue _j , determine the final number of PRBs that can be allocated to the ue _j as N _{power_available} .

The advantages and disadvantages of the above four solutions are as follows:

Advantages and disadvantages of scheme 1: The scheme is simple, but because the UE side believes that the ratio of EPRE of PDSCH to EPRE of CRS remains unchanged, while the ratio of EPRE of PDSCH to CRS at the base station has changed, this scheme will cause the UE side and the base station to understand Inconsistency occurs, affecting data demodulation at the UE side.

Advantages and disadvantages of scheme 2: the scheme is simple, and the ratio of EPRE of PDSCH to EPRE of CRS on the UE side remains unchanged, which is consistent with the understanding on the base station side, so it will not affect data demodulation. However, since the UE side considers the CRS transmit power as P _CRS , and the base station side CRS transmit power as P _CRS /β, there is a situation in which the UE side and the base station side understand inconsistently, which will affect the channel estimation.

Advantages and disadvantages of scheme three: the scheme is simple, but because the downlink scheduling module has successfully allocated resources to the user, it cannot schedule the user due to power constraints, so the quality of service (QoS) of the user may not be guaranteed, and the system Resources are underutilized.

Advantages and disadvantages of solution four: because the downlink scheduling module has successfully allocated resources for scheduling users, due to power constraints, resource allocation needs to be re-allocated, which increases the complexity of scheduling. However, since this scheme does not affect data demodulation, channel estimation, and user QoS requirements, and can make full use of system resources, power protection is realized while minimizing complexity.

Referring to Fig. 3, a resource scheduling device provided by an embodiment of the present invention includes:

Determining unit 11, for determining the real-time transmission power of each OFDM symbol of each subframe, and the maximum output power of each antenna connector;

The comparison processing unit 12 is configured to compare the real-time transmission power with the maximum output power, and perform power resource scheduling of the transmission energy EPRE of each resource element of the physical downlink shared channel PDSCH according to the comparison result.

Preferably, the comparison processing unit 12 is specifically used for:

When the real-time transmit power is less than or equal to the maximum output power, according to the value of the common reference signal CRS EPRE, the ratio ρ _B of PDSCH EPRE including CRS to CRS EPRE, and the ratio of PDSCH EPRE not including CRS to CRS EPRE ρ _A , to determine the power of the PDSCH EPRE.

Preferably, the comparison processing unit 12 is specifically used for:

When the real-time transmission power is greater than the maximum output power, determine the transmission power of each RE of the PDSCH as: (ρ _A · P _CRS )/β;

P_sum为所述实时发射功率，

为所述最大输出功率，ρ_A为不包含公共参考信号CRS的PDSCH EPRE与CRS EPRE的比值，P_CRS为每个小区专属参考符号的发射功率。in,

P _sum is the real-time transmit power,

is the maximum output power, ρ _A is the ratio of the PDSCH EPRE not including the common reference signal CRS to the CRS EPRE, and P _CRS is the transmission power of each cell-specific reference symbol.

Preferably, the comparison processing unit 12 is specifically used for:

When the real-time transmission power is greater than the maximum output power, determine the transmission power of each RE of the PDSCH as: (ρ _A · P _CRS )/β;

And, determine the transmit power of CRS as: P _CRS /β;

P_sum为所述实时发射功率，

为所述最大输出功率，ρ_A为不包含公共参考信号CRS的PDSCH EPRE与CRS EPRE的比值，P_CRS为每个小区专属参考符号的发射功率。in,

P _sum is the real-time transmit power,

is the maximum output power, ρ _A is the ratio of the PDSCH EPRE not including the common reference signal CRS to the CRS EPRE, and P _CRS is the transmission power of each cell-specific reference symbol.

Preferably, the comparison processing unit 12 is specifically used for:

When the real-time transmit power is greater than the maximum output power, it is determined that the resource allocation of some users whose resources have been successfully allocated currently fails.

Preferably, the comparison processing unit 12 can have the above-mentioned multiple functions at the same time.

Referring to FIG. 4, another resource scheduling device provided by an embodiment of the present invention includes:

The statistical remaining available power unit 21 is used to count the total power of users who have successfully allocated resources, and when it is determined that the total power is less than the preset maximum output power, determine the remaining available power according to the total power and the maximum output power power;

A PRB power value determination unit 22, configured to determine the power value of each PRB of the current user to be scheduled;

The PRB number determination unit 23 is configured to determine the number of PRBs allocated to the current user to be scheduled according to the remaining available power and the power value of each PRB of the current user to be scheduled.

Preferably, the statistical remaining available power unit 21 is also used for:

When it is determined that the total power is greater than or equal to the maximum output power, it is determined not to allocate resources to the current user to be scheduled.

Preferably, the resource scheduling device provided by the embodiment of the present invention is a base station.

In summary, the power protection scheme of the downlink physical shared channel PDSCH provided by the embodiment of the present invention includes scheme 1, scheme 2, scheme 3 and scheme 4, specifically including: dynamically adjusting the transmit power of each OFDM symbol Limit, to ensure that it does not exceed the maximum transmission power allowed by the device; consider the remaining available power limit before allocating resources for each user; before allocating resources for each user, calculate the maximum number of resources that can be allocated to this user; success for each user After allocating resources, calculate the occupied power resources and the remaining available power resources; the corresponding relationship between the maximum number of resources that can be allocated by the user and the available remaining power resources, high-level parameters, and reference symbol power; according to the maximum number of resources that can be allocated to users , to determine the number of resources successfully assigned to the user.

Therefore, the embodiment of the present invention comprehensively considers the real-time output of the downlink scheduling module of each subframe and the PRB allocated by each user, as well as the PDSCH power allocated by the actual scheduled user and the maximum transmission power allowed by the device. It achieves the purpose that the total transmission power on each OFDM symbol of the downlink physical shared channel PDSCH will not exceed the limit of the maximum transmission power, and ensures the stability of the device.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (14)

1. A method for scheduling resources, the method comprising:

determining the real-time transmitting power of each Orthogonal Frequency Division Multiplexing (OFDM) symbol of each subframe and the maximum output power of each antenna connector;

and comparing the real-time transmitting power with the maximum output power, and scheduling power resources of the energy EPRE transmitted by each resource unit of the PDSCH according to the comparison result.

2. The method according to claim 1, wherein the performing power resource scheduling of the transmission energy EPRE of each resource element of the PDSCH according to the comparison result comprises:

when the real-time transmitting power is smaller than or equal to the maximum output power, according to the value of CRS EPRE, the ratio rho of PDSCH EPRE containing CRS and CRS EPRE_BAnd the ratio ρ of PDSCH EPRE containing no CRS to CRS EPRE_AAnd PDSCH EPRE power is determined.

3. The method according to claim 1, wherein the performing power resource scheduling of the transmission energy EPRE of each resource element of the PDSCH according to the comparison result comprises:

when the real-time transmission power is greater than the maximum output power, determining the transmission power of each RE of the PDSCH as: (ρ)_A·P_CRS)/β；

Wherein,

P_sumfor the purpose of the real-time transmit power,

for the maximum output power, p_ARatio of PDSCH EPRE not containing common reference signal CRS to CRS EPRE, P_CRSThe transmit power of each cell-specific reference symbol.

4. The method according to claim 1, wherein the performing power resource scheduling of the transmission energy EPRE of each resource element of the PDSCH according to the comparison result comprises:

when the real-time transmission power is greater than the maximum output power, determining the transmission power of each RE of the PDSCH as: (ρ)_A·P_CRS)/β；

And isDetermining the transmission power of the CRS as follows: p_CRS/β；

Wherein,

P_sumfor the purpose of the real-time transmit power,

for the maximum output power, p_ARatio of PDSCH EPRE not containing common reference signal CRS to CRS EPRE, P_CRSThe transmit power of each cell-specific reference symbol.

5. The method according to claim 1, wherein the performing power resource scheduling of the transmission energy EPRE of each resource element of the PDSCH according to the comparison result comprises:

and when the real-time transmitting power is larger than the maximum output power, determining that the resource allocation of the part of users which have successfully allocated the resources currently fails.

6. A method for scheduling resources, the method comprising:

counting the total power of users successfully allocated with resources, and determining the remaining available power according to the total power and the maximum output power when the total power is determined to be smaller than the preset maximum output power;

determining a power value of each Physical Resource Block (PRB) of a current user to be scheduled;

and determining the number of PRBs allocated to the current user to be scheduled according to the remaining available power and the power value of each physical resource block PRB of the current user to be scheduled.

7. The method of claim 6, further comprising:

and when the total power is determined to be greater than or equal to the maximum output power, determining that the resources are not allocated to the current user to be scheduled.

8. An apparatus for scheduling resources, the apparatus comprising:

a determining unit, configured to determine a real-time transmit power of each OFDM symbol of each subframe and a maximum output power of each antenna connector;

and the comparison processing unit is used for comparing the real-time transmitting power with the maximum output power and scheduling the power resource of the energy EPRE transmitted by each resource unit of the PDSCH according to the comparison result.

9. The apparatus according to claim 8, wherein the comparison processing unit is specifically configured to:

when the real-time transmitting power is smaller than or equal to the maximum output power, according to the value of CRS EPRE, the ratio rho of PDSCH EPRE containing CRS and CRS EPRE_BAnd the ratio ρ of PDSCH EPRE containing no CRS to CRS EPRE_AAnd PDSCH EPRE power is determined.

10. The apparatus according to claim 8, wherein the comparison processing unit is specifically configured to:

when the real-time transmission power is greater than the maximum output power, determining the transmission power of each RE of the PDSCH as: (ρ)_A·P_CRS)/β；

Wherein,

P_sumfor the purpose of the real-time transmit power,

for the maximum output power, p_ARatio of PDSCH EPRE not containing common reference signal CRS to CRS EPRE, P_CRSThe transmit power of each cell-specific reference symbol.

11. The apparatus according to claim 8, wherein the comparison processing unit is specifically configured to:

when the real-time transmission power is greater than the maximum output power, determining the transmission power of each RE of the PDSCH as: (ρ)_A·P_CRS)/β；

And, determining the transmission power of the CRS as: p_CRS/β；

Wherein,

P_sumfor the purpose of the real-time transmit power,

for the maximum output power, p_ARatio of PDSCH EPRE not containing common reference signal CRS to CRS EPRE, P_CRSThe transmit power of each cell-specific reference symbol.

12. The apparatus according to claim 8, wherein the comparison processing unit is specifically configured to:

and when the real-time transmitting power is larger than the maximum output power, determining that the resource allocation of the part of users which have successfully allocated the resources currently fails.

13. An apparatus for scheduling resources, the apparatus comprising:

the device comprises a statistics residual available power unit, a resource allocation unit and a resource allocation unit, wherein the statistics residual available power unit is used for counting the total power of users which have successfully allocated resources, and when the total power is determined to be smaller than the preset maximum output power, the residual available power is determined according to the total power and the maximum output power;

a PRB power value determining unit, configured to determine a power value of each physical resource block PRB of a current user to be scheduled;

and a PRB number determining unit, configured to determine, according to the remaining available power and the power value of each physical resource block PRB of the current user to be scheduled, the number of PRBs allocated to the current user to be scheduled.

14. The apparatus of claim 13, wherein the statistical remaining available power unit is further configured to:

and when the total power is determined to be greater than or equal to the maximum output power, determining that the resources are not allocated to the current user to be scheduled.

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