CN105307253B - To the Poewr control method of high-power cluster terminal, system and device - Google Patents
To the Poewr control method of high-power cluster terminal, system and device Download PDFInfo
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Abstract
The present invention proposes in a kind of TD-LTE system to the Poewr control method of high-power cluster terminal, system and device, wherein high-power cluster terminal is the colony terminal greater than peak power output as defined in LTE standard, this method comprises: eNB sends high-power cluster terminal in the maximum allowable transmission power P of RB to high-power cluster terminalRB_MAX；High-power cluster terminal is according to the PRB_MAXAnd other relevant parameters determine the transimission power P of high-power cluster terminal Physical Uplink Shared Channel (PUSCH) in subframe iPUSCH(i).The present invention can execute power control to the high-power cluster terminal in TD-LTE system.
Description
Technical Field
The invention relates to the technical field of power control of a TD-LTE (time division-Long term evolution) system, in particular to a method, a system and a device for controlling the power of a high-power trunking terminal in the TD-LTE system.
Background
The TD-LTE technology is a new generation broadband mobile communication wireless access technology, and compared with the wireless access technology of the existing 2G and 3G mobile communication systems, the TD-LTE technology has the characteristics of high transmission rate, small transmission delay, high QoS guarantee and the like. In the existing TD-LTE technology, the characteristics of trunking services are increased, and the TD-LTE broadband digital trunking communication system is a development direction of trunking communication systems.
Currently, in a wideband digital trunking communication system based on TD-LTE technology, the maximum output power of an existing trunking terminal is compliant with 3GPP LTE protocol, and a currently defined requirement of a terminal of power class 3 is that the maximum output power at any transmission bandwidth within a channel bandwidth is 23dBm, and such a terminal is herein referred to as an LTE standard power trunking terminal. In order to ensure that the trunking terminal located in the shadow area or at the edge of the cell can still perform a service with a high rate, the wideband digital trunking communication system based on the TD-LTE technology needs to add a trunking terminal with a maximum output power greater than that specified in the LTE standard, and such a terminal is herein referred to as a high-power trunking terminal. Thus, there may be terminals with different maximum output powers in the trunking system (LTE standard power trunking terminal and high power trunking terminal). The trunking system needs to solve the problem of performing power control on a high-power trunking terminal and how to support the power control on terminals with different maximum output powers, and particularly the influence of the high-power trunking terminal on interference caused by an LTE standard power trunking terminal.
There are 4 classes of power specified for TD-LTE terminals (UEs) in the LTE protocol. Only the power class 3 requirement is currently defined, requiring a maximum output power of 23dBm with a tolerance of ± 2dB for any transmit bandwidth within the channel bandwidth for all TDD bands. The measurement time of the transmission power is at least one subframe. Allow the terminalEnd sets its maximum transmitting power PCMAX. The values are within the following limits:
PCMAX_L≤PCMAX≤PCMAX_H
wherein:
PCMAX_L＝MIN{PEMAX–ΔTC,PPowerClass–MPR–A-MPR– TC}；
PCMAX_H＝MIN{PEMAX,PPowerClass}；
PEMAXis the value of cell P-Max of RRC message sent by the base station, and is defined in LTE 36.331 protocol;
PPowerClassis the terminal maximum output power, regardless of various tolerances defined, such as 23dBm for a class 3 terminal;
MPR is maximum power reduction, which allows a reduction of the maximum output power due to the introduction of higher order modulation and transmission bandwidth configuration on the basis of a defined maximum output power.
a-MPR is an additional maximum power reduction that is allowed for the maximum output power in order to meet some additional requirements.
ΔTC: 0dB for TDD bands and 1.5dB for some FDD bands.
In the LTE system, uplink power control determines the average power of one SC-FDMA symbol in a physical channel. The power control of the uplink shared channel is to adjust the transmission power of the uplink shared channel, so as to compensate the influence of path loss, shadow fading, fast fading and the like; meanwhile, the power control of the uplink shared channel can also be used for controlling the interference level among cells and reducing the interference among cells with the same frequency. The LTE standard specifies Uplink Shared CHannel power control, and the UE transmits power P of a Physical Uplink Shared CHannel (PUSCH) in subframe iPUSCH(i) Is defined as:
PPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)}[dBm]
in the formula, PCMAXIs the maximum allowed transmission power determined by the UE grade and is configured by the higher layer; mPUSCH(i) Is the size of the resource allocated for PUSCH in effect in the ith subframe, expressed in number of Resource Blocks (RBs); pO_PUSCH(j) Is the initial value of the PUSCH power and is given by the high layer signaling. PO_PUSCH(j) Cell level parameter P configured by higher layer, where j may take 0 or 1O_NOMINAL_PUSCH(j) And a UE level parameter P configurable by higher layers, where j may take 0 or 1O_UE_PUSCH(j) And (4) the sum of the components. When j is 0, corresponding to PUSCH transmission or retransmission of semi-static authorization; when j is 1, corresponding to PUSCH transmission or retransmission of dynamic authorization; when j is 2, corresponding to PUSCH transmission or retransmission of random access response authorization, at this time PO_NOMINAL_PUSCH(2)＝PO_PRE+ΔPREAMBLE_Msg3，PO_UE_PUSCH(2) 0, wherein P0_PREAnd ΔPREAMBLE_Msg3Configured by higher layer signaling, when j is 0 or 1, α is a cell level parameter of 3bit higher layer configuration, when j is 2, α (j) is 1, PL is down path loss calculated by UE side, if K is 0 or 1, then α is a cell level parameter of 0,0.4,0.5,0.6,0.7,0.8,0.9,1, when j is 0, then PL is down path loss calculated by UE sideSWhen the content is equal to 1.25,indicating that different MCS modes correspond to different power offsets (the larger the MPR is, the larger the required transmission power is); if K isSWhen equal to 0, ΔTF(i) 0 indicates that the function of power adjustment with MCS is turned off. KSThe deltaMCS-Enabled parameter is configured by the higher layer.For control data sent over PUSCH without UL-SCH, others equal 1; deltaPUSCHIs a UE-specific power correction value, also called TPC command, contained in the PDCCH of DCI format 0,or jointly coded with other TPC commands and carried on a PDCCH with a DCI format of 3/3A, and CRC check bits are scrambled by using TPC-PUSCH-RNTI. The current PUSCH power control adjustment state is given by f (i), which is defined as: if the UE-specific parameter Accumulation-enabled notified by the higher layer turns on the power adjustment in the Accumulation value system, f (i) ═ f (i-1) + δPUSCH(i-KPUSCH) Wherein δPUSCH(i-KPUSCH) In sub-frames i-K by DCI format 0 or 3/3APUSCHIn the notification, f (0) is the first value after resetting the accumulated value, KPUSCHSee table 1 for details. If the UE-specific parameter (Accumulation-enabled) notified by the higher layer does not turn on the power adjustment of the Accumulation value system, f (i) becomes δPUSCH(i-KPUSCH) Wherein δPUSCH(i-KPUSCH) From sub-frames i-KPUSCHPDCCH indication with DCI format 0, KPUSCHSee table 1 for details.
TABLE 1 TDD configurations 0-6KPUSCHValue taking
According to the requirements of industrial users, a high-power trunking terminal is added to a broadband digital trunking communication system of the TD-LTE technology, and the maximum output power of the terminal is greater than the maximum output power (23dBm) specified by the existing LTE protocol, for example, the maximum output power of the high-power trunking terminal is 38 dBm. Thus, there may be terminals with different maximum output powers in the trunking system (LTE standard power trunking terminal and high power trunking terminal). The existing LTE protocol does not support a high-power trunking terminal, so that a power control method for the high-power trunking terminal in a TD-LTE system does not exist at present.
Disclosure of Invention
The invention provides a power control method for a high-power trunking terminal in a TD-LTE system, which can execute power control on the high-power trunking terminal in the TD-LTE system.
The invention also provides a system for realizing power control on the high-power trunking terminal in the TD-LTE system, the eNB and the high-power trunking terminal, and the system can be used for executing power control on the high-power trunking terminal in the TD-LTE system.
The technical scheme of the invention is realized as follows:
a power control method for a high-power trunking terminal in a TD-LTE system, wherein the high-power trunking terminal is a trunking terminal with the maximum output power greater than the maximum output power specified by the LTE standard, and the method comprises the following steps:
the eNB sends the maximum allowable transmission power P of the high-power trunking terminal in the RB to the high-power trunking terminalRB_MAX；
The high-power cluster terminal is according to the PRB_MAXAnd other related parameters determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)。
A system for realizing power control on a high-power trunking terminal in a TD-LTE system, wherein the high-power trunking terminal is a trunking terminal with the maximum output power larger than the maximum output power specified by an LTE standard, and the system comprises:
eNB for sending maximum allowable transmission power P of the high-power trunking terminal in RB to the high-power trunking terminalRB_MAX；
High power cluster terminal according to said PRB_MAXAnd other related parameters determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)。
An eNB for realizing power control on a high-power trunking terminal in a TD-LTE system, wherein the high-power trunking terminal is a trunking terminal with the maximum output power larger than the maximum output power specified by an LTE standard, and the eNB comprises:
a parameter sending module for sending the high-power cluster to the high-power cluster terminalMaximum allowed transmission power P of terminal in RBRB_MAXThe method is used for the high-power trunking terminal to determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)。
A high-power trunking terminal for realizing power control in a TD-LTE system, wherein the high-power trunking terminal is a trunking terminal with the maximum output power greater than the maximum output power specified by an LTE standard, and the high-power trunking terminal comprises:
a parameter receiving module for receiving the maximum allowable transmitting power P of the high-power trunking terminal in the RBRB_MAX；
A power control module for controlling power according to the PRB_MAXAnd other related parameters determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)。
Therefore, the method, the system and the device for realizing the power control of the high-power trunking terminal in the TD-LTE system, which are provided by the invention, send the maximum allowable transmitting power P of the high-power trunking terminal in the RB to the high-power trunking terminal by the eNBRB_MAX(ii) a And the high-power trunking terminal realizes power control according to the received parameters and other related parameters.
Drawings
Fig. 1 is a flowchart illustrating an implementation of a power control method for a high-power trunking terminal in a TD-LTE system according to the present invention;
fig. 2 is a schematic structural diagram of a system for implementing power control on a high-power trunking terminal in the TD-LTE system proposed by the present invention;
fig. 3 is a schematic structural diagram of an eNB for implementing power control on a high-power trunking terminal in the TD-LTE system provided by the present invention;
fig. 4 is a schematic structural diagram of a high-power trunking terminal for implementing power control on the high-power trunking terminal in the TD-LTE system provided by the present invention.
Detailed Description
The invention provides a power control method for a high-power trunking terminal in a TD-LTE system, wherein the high-power trunking terminal refers to a trunking terminal with the maximum output power larger than the maximum output power specified by an LTE standard, and as shown in a flowchart of fig. 1, the method comprises the following steps:
step 101: the eNB sends the maximum allowable transmission power of the high-power trunking terminal in the RB to the high-power trunking terminal;
step 102: the high-power cluster terminal is according to the PRB_MAXAnd other related parameters determine the transmission power P of the PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)。
The following detailed description refers to specific embodiments.
The first embodiment is as follows:
terminals with different maximum output powers may be present in a TD-LTE based trunking system: LTE standard power trunking terminal and high-power trunking terminal. For LTE standard power trunking terminal, the specification of LTE standard for uplink shared channel power control is followed, namely the transmission power P of PUSCH in subframe i of LTE standard power trunking terminalPUSCHIs defined as:
PPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)}[dBm]
(1)
for the high-power trunking terminal, the invention considers the two aspects of improving the link efficiency of the high-power trunking terminal and reducing the interference between cells by the high-power terminal, and provides the regulation of the uplink shared channel power control of the high-power terminal, namely the high-power trunking terminalTransmission power P of PUSCH in subframe iPUSCHIs defined as:
wherein, PCMAXIt is allowed for a high power trunking terminal to set its configured maximum transmit power.
PRB_MAXIs the maximum allowed transmit power of the high power trunked terminal in a Resource Block (RB). The other parameters in equation (2) are specified in the LTE protocol, and are not described in detail herein.
The following describes P in formula (2)CMAXAnd PRB_MAXThe manner of acquisition.
First, PCMAXThe values of (a) are within the following limits:
PCMAX_L≤PCMAX≤PCMAX_H (3)
wherein,
PCMAX_L＝min{PEMAX_HighPowerUE–TC,PPowerClass–MPR–A-MPR–TC}；
PCMAX_H＝min{PEMAX_HighPowerUE,PPowerClass}；
PEMAX_HighPowerUEthe maximum allowed transmission power transmitted to the high-power terminal by the base station is used for limiting the uplink transmission power of the high-power terminal. For PEMAX_HighPowerUEThere are two implementations as follows, which cell value is.
The implementation mode is as follows: the original P-MAX information element in the 3GPP TS 36.331 protocol is used for indicating the maximum allowable transmission power of a base station to a high-power terminal, namely PEMAX_HighPowerUEIs the value of cell P-Max for the base station to send RRC messages.
The implementation mode two is as follows: new cell coming fingerIndicating the maximum allowed transmission power, i.e. P, of a base station to a high-power terminalEMAX_HighPowerUEIs the value of the cell P-Max-forkhPower UE newly added by the base station sending RRC message. Specifically, the P-Max-forkhpowerme may add the parameter to the SIB1 cell, or may add the parameter to the added cluster information block sibrunking. The parameter is an optional cell level parameter, and if the parameter does not indicate, the high-power terminal determines the maximum transmission power according to the power level of the terminal.
For the two implementation modes, the maximum output power of the high-power terminal can be determined according to the system requirements of the cluster system to determine which implementation mode is adopted. Since the value range of the P-Max specified in the protocol is [ -30,33], if the maximum transmission power of the high-power terminal is designed in the trunking system to be within this range, the first implementation mode may be selected. If the maximum transmission power of the high-power terminal designed by the cluster system exceeds the range, the second implementation mode can be selected.
PPowerClassThe maximum output power of the high-power cluster terminal is not considered by various defined tolerances, and the maximum output power can be 38dBm or other values.
There are 4 classes of power specified for TD-LTE terminals (UEs) in the LTE protocol. Only the power class 3 requirement is currently defined, requiring a maximum output power of 23dBm with a tolerance of ± 2dB for any transmit bandwidth within the channel bandwidth for all TDD bands. Due to the introduction of the high-power trunking terminal, the requirement of the TD-LTE trunking system on the power level 4 is defined, namely the maximum output power of all TDD frequency bands under any emission bandwidth in a channel bandwidth is required to be 38dBm, the tolerance is +/-2 dB, and the maximum output power of the high-power trunking terminal can be defined to be other values according to the system requirement. That is, the high-power trunking terminal is determined as a terminal of power class 4, and the LTE standard power trunking terminal is determined as a terminal of power class 3.
PRB_MAXThe maximum allowable transmitting power of the high-power cluster terminal in a Resource Block (RB) is increased by the base stationThe new parameter P-RB-Max-forHighPower UE in SIBTrunking is added to set PRB_MAXThe value of (c). The parameter can limit the maximum transmitting power of the high-power trunking terminal in each RB, the parameter is reasonably configured, and the interference of the high-power terminal to the same-frequency cells can be further reduced, particularly the interference to the LTE standard power trunking terminal in the adjacent cell is reduced.
In order to realize that the eNB sends the parameters to the high-power trunking terminal, a new system message type, SystemInformationBlockTypeTrunking, can be added. The UE applies the systemlnformationblocktypereporting acquisition procedure to acquire cluster-related system information. Correspondingly, a new Sib Type (Sib Type), namely, systeminformationblocktypereporting, is added to the SystemInformationBlockType1, and a new clustering information block of the systeminformationblocktypereporting Type, namely, sibrunking, is added.
The following three embodiments describe three ways of adding the maximum allowed transmission power P-Max-forkhpower ue cell sent by the eNB to the high-power trunking terminal and the maximum allowed transmission power P-RB-Max-forkhpower ue cell of the high-power trunking terminal in the Resource Block (RB) in the new sibrunking.
In addition, the eNB needs to know the power class of the terminal. Because the maximum output power of the LTE standard power cluster terminal is only 23dBm grade, the maximum output power does not need to be reported to the eNB to obtain the power grade of the UE; however, due to the introduction of a high-power cluster terminal, there are 2 power classes for the maximum output power of the terminal at present, and the eNB needs to know the power class of the terminal. Considering the problem of reducing air interface signaling overhead and terminal compatibility as much as possible, the power level does not need to be reported for the LTE standard power cluster terminal, and the reporting of the power level is increased for the high-power cluster terminal. Specifically, a ue-PowerClass parameter may be newly added in the UECapabilityInformation information element to indicate the power level of the terminal. The ue-PowerClass is an optional parameter indicating 4 levels of terminal power. In addition, the terminal can also report the terminal type directly, so that the reporting can be realized only by one indicator bit.
For the UE, if the UE is a high-power trunking terminal, the UE-PowerClass parameter needs to be added to report the power level of the UE-PowerClass parameter to the trunking system, and if the UE is an LTE standard power trunking terminal, the UE-PowerClass parameter may not be reported.
For the eNB, if the terminal does not report the power level, the terminal is considered as the terminal with the power level of 3, namely the maximum output power is 23 dBm; and if the terminal reports the power level, acquiring the maximum output power of the terminal according to the specific numerical value in the ue-PowerClass.
Example two:
the systemlnformationblocktypetracking contains cluster-related system information as in table 2.
TABLE 2
In the above table, the P-Max-forhighpower cell is used to limit the uplink transmission power of the high-power terminal, PEMAX_HighPowerUEThe maximum allowable transmission power P-Max-forHighPower value is sent to the high-power trunking terminal by the base station, and the high-power trunking terminal can set the maximum transmission power P configured by the high-power trunking terminal according to the parameterCMAX。
The following table 3 is systemlnformationblocktypetracking domain description information.
TABLE 3
Table 4 below shows information of P-Max-forkhPowerUE cells.
TABLE 4
The P-RB-Max-ForhighPower cell is used for limiting the transmission power of the high-power cluster terminal on each RB, and the base station sets P through the P-RB-Max-ForhighPowerRB_MAXThe numerical value of (2) plays a role in regulating and controlling the interference of the high-power cluster terminal on the same-frequency adjacent regions. The following table 5 shows information of P-RB-Max-forkhPowerUE cells.
TABLE 5
Example three:
in this embodiment, another form of embodiment of the maximum allowed transmission power P-Max-forhighpower cell sent to the high-power terminal by the newly added base station and the maximum allowed transmission power P-RB-Max-forhighpower cell of the high-power trunking terminal in the Resource Block (RB) is shown in table 6 below.
TABLE 6
P-Max-ForhighPower cell for limiting up-going transmission power of high-power terminalEMAX_HighPowerUEThe maximum allowable transmission power P-Max-forHighPower UE value is sent to the high-power terminal by the base station, and according to the parameter, the high-power terminal sets the maximum transmission power configured by the high-power terminalPCMAX。
The following table 7 shows the description information of the P-Max-forhighpower ue cell.
TABLE 7
The P-RB-Max-ForhighPower cell is used for limiting the transmission power of the high-power terminal on each RB, and the base station sets P through the P-RB-Max-ForhighPowerRB_MAXThe numerical value plays a role in regulating and controlling the interference of the high-power terminal on the same-frequency adjacent regions.
The following table 8 shows the information of the P-RB-Max-forkhPowerUE cell.
TABLE 8
Example four:
in this embodiment, another form of the maximum allowed transmission power P-Max-forhighpower parameter sent to the high-power terminal by the newly added base station and the maximum allowed transmission power P-RB-Max-forhighpower parameter of the high-power trunking terminal in the Resource Block (RB) is given in the newly added sibrunking, as shown in table 9 below.
TABLE 9
The above describes a method and a specific embodiment for implementing power control on a high-power trunking terminal in a TD-LTE system according to the present invention. The present invention further provides a system for implementing power control on a high-power cluster terminal, and as shown in fig. 2, the structural diagram of the system includes:
an eNB 201, configured to send the maximum allowed transmit power P of the high-power trunking terminal in the RB to the high-power trunking terminal 202RB_MAX；
A high power cluster terminal 202 for generating PRB_MAXAnd other related parameters determine the transmission power P of the PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)。
In the above system, the high power trunking terminal 202 determines PPUSCH(i) The method can be as follows:
PPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PRB_MAX,10log10(MPUSCH(i))+PO_PUSCH(j) +α(j)·PL+ΔTF(i)+f(i)} [dBm]
wherein, PCMAXSetting the maximum configured transmitting power for the high-power cluster terminal;
MPUSCH(i) the size of the resource allocated for the PUSCH and effective in the ith subframe;
PO_PUSCH(j) is the PUSCH power initial value;
α (j) cell level parameters configured for higher layers;
PL is downlink path loss;
ΔTF(i) is the power offset;
f (i) adjusting the state parameter for the current PUSCH power control.
In the above system, the eNB 201 may use the P-RB-Max-for-high power ue in the newly added cluster information block sibrunking to send the P-RB-Max-for-high power ueRB_MAX。
In the above system, the high-power trunking terminal 202 may also be configured to send the power class or the terminal type of the high-power trunking terminal to the eNB 201.
The present invention further provides an eNB for implementing power control on a high-power trunking terminal in a TD-LTE system, where the high-power trunking terminal is a trunking terminal with a maximum output power greater than that specified in the LTE standard, and as shown in fig. 3, the eNB is a schematic structural diagram, and includes:
a parameter sending module 301, configured to send the maximum allowed transmit power P of the high-power trunking terminal in the RB to the high-power trunking terminalRB_MAXThe method is used for the high-power trunking terminal to determine the transmission power P of the PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)。
The parameter sending module 301 may send the P-RB-Max-for-high power ue in the newly added cluster information block sibrunkingRB_MAX。
The eNB may further include: a power level receiving module 302, configured to receive a power level or a terminal type of the high-power trunking terminal.
The present invention further provides a high power trunking terminal for implementing power control in a TD-LTE system, where the high power trunking terminal is a trunking terminal with a maximum output power greater than that specified in the LTE standard, and as shown in fig. 4, the structure of the high power trunking terminal is schematically illustrated, and the high power trunking terminal includes:
a parameter receiving module 401, configured to receive the maximum allowed transmit power P of the high-power trunking terminal in the RBRB_MAX；
A power control module 402 for controlling the power according to the PRB_MAXAnd other related parameters determine the transmission power P of the PUSCH (physical uplink shared channel) of the high-power trunking terminal in the subframe iPUSCH(i)。
The power control module 402 determines the transmission power P of the PUSCH of the high-power trunking terminal in the subframe iPUSCH(i) The method can be as follows:
PPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PRB_MAX,10log10(MPUSCH(i))+PO_PUSCH(j)
+α(j)·PL+ΔTF(i)+f(i)} [dBm]
wherein, PCMAXSetting the maximum configured transmitting power for the high-power cluster terminal;
MPUSCH(i) the size of the resource allocated for the PUSCH and effective in the ith subframe;
PO_PUSCH(j) is the PUSCH power initial value;
α (j) cell level parameters configured for higher layers;
PL is downlink path loss;
ΔTF(i) is the power offset;
f (i) adjusting the state parameter for the current PUSCH power control.
The high-power trunking terminal may further include: a power class reporting module 403, configured to report the power class or the terminal type to the eNB.
In summary, the method, the system and the device for realizing power control on the high-power trunking terminal in the TD-LTE system provided by the invention can support power control on terminals with different maximum output powers based on the TD-LTE trunking system. The invention provides a regulation for controlling the power of an uplink shared channel of a high-power terminal, namely the transmission power P of a PUSCH (physical uplink shared channel) of the high-power trunking terminal in a subframe iPUSCHDefining and giving maximum transmitting power P for setting configuration of high-power terminalCMAXThe related parameter indication method, and the method for dividing and reporting the terminal power level. The invention provides a rule for controlling the power of the high-power trunking terminal, and the eNB can effectively reduce the interference of the high-power terminal to the same-frequency cells by configuring the maximum allowed transmitting power of the high-power trunking terminal in a Resource Block (RB), so that the normal communication of the LTE standard power trunking terminal of the adjacent cells is ensured, and the uplink performance of a trunking system is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A power control method for a high-power trunking terminal in a TD-LTE system, wherein the high-power trunking terminal is a trunking terminal with a maximum output power greater than that specified by an LTE standard, and the method comprises the following steps:
the eNB sends the maximum allowable transmission power P of the high-power trunking terminal in the RB to the high-power trunking terminalRB_MAX；
The high-power cluster terminal is according to the PRB_MAXAnd other related parameters determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)；
The high-power cluster terminal is according to the PRB_MAXAnd other related parameters determine the transmission power P of the PUSCH of the high-power trunking terminal in the subframe iPU(i) The method comprises the following steps: pPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PRB_MAX,10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)} [dBm]
Wherein, PCMAXSetting the maximum configured transmitting power for the high-power cluster terminal;
MPUSCH(i) the size of the resource allocated for the PUSCH and effective in the ith subframe;
PO_PUSCH(j) is the PUSCH power initial value;
α (j) cell level parameters configured for higher layers;
PL is downlink path loss;
ΔTF(i) is the power offset;
f (i) adjusting the state parameter for the current PUSCH power control.
2. The method of claim 1, wherein the eNB sends the P-RB-Max-forkhpowerme ue in a newly added cluster information block, sibrunkingRB_MAX。
3. The method of claim 1, further comprising: and the high-power trunking terminal sends the power grade or the terminal type of the high-power trunking terminal to the eNB.
4. A system for realizing power control on a high-power trunking terminal in a TD-LTE system, wherein the high-power trunking terminal is a trunking terminal with the maximum output power greater than the maximum output power specified by the LTE standard, and the system is characterized by comprising:
eNB for sending maximum allowable transmission power P of the high-power trunking terminal in RB to the high-power trunking terminalRB_MAX；
A high-power cluster terminal for receiving the PRB_MAXAnd other related parameters determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)；
The high-power cluster terminal is according to PRB_MAXAnd other related parameters determine the transmission power P of the PUSCH of the high-power trunking terminal in the subframe iPUSCH(i) The method comprises the following steps:
PPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PRB_MAX,10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)} [dBm]
wherein, PCMAXSetting the maximum configured transmitting power for the high-power cluster terminal;
MPUSCH(i) the size of the resource allocated for the PUSCH and effective in the ith subframe;
PO_PUSCH(j) is the PUSCH power initial value;
α (j) cell level parameters configured for higher layers;
PL is downlink path loss;
ΔTF(i) is the power offset;
f (i) adjusting the state parameter for the current PUSCH power control.
5. The system of claim 4, wherein the eNB sends the P-RB-Max-forkhPower using the P-RB-Max-forkhPower UE in the newly added trunking information block, SIBrunkingRB_MAX。
6. The system of claim 4, wherein the high power trunked terminal is further configured to send the power class or terminal type of the high power trunked terminal to the eNB.
7. An eNB for realizing power control on a high-power trunking terminal in a TD-LTE system, wherein the high-power trunking terminal is a trunking terminal with maximum output power greater than that specified by LTE standard, and the eNB comprises:
a parameter sending module for sending the maximum allowable transmitting power P of the high-power trunking terminal in the RB to the high-power trunking terminalRB_MAXThe method is used for the high-power trunking terminal to determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i) Wherein
PPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PRB_MAX,10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)} [dBm]
wherein, PCMAXSetting the maximum configured transmitting power for the high-power cluster terminal;
MPUSCH(i) the size of the resource allocated for the PUSCH and effective in the ith subframe;
PO_PUSCH(j) is the PUSCH power initial value;
α (j) cell level parameters configured for higher layers;
PL is downlink path loss;
ΔTF(i) is the power offset;
f (i) adjusting the state parameter for the current PUSCH power control.
8. The eNB of claim 7 wherein said parameter sending module sends said P using P-RB-Max-forkhPower in a newly added trunking information block, SIBtrundingRB_MAX。
9. The eNB of claim 7 or 8, wherein said eNB further comprises: and the power grade receiving module is used for receiving the power grade or the terminal type of the high-power cluster terminal.
10. A high-power trunking terminal for realizing power control in a TD-LTE system is a trunking terminal with the maximum output power greater than the maximum output power specified by LTE standard, and is characterized by comprising:
a parameter receiving module for receiving the maximum allowable transmitting power P of the high-power trunking terminal in the RBRB_MAX；
A power control module for controlling power according to the PRB_MAXAnd other related parameters determine the transmission power P of the physical uplink shared channel PUSCH of the high-power trunking terminal in the subframe iPUSCH(i)；
The power control module determines the transmission power P of the PUSCH of the high-power trunking terminal in the subframe iPUSCH(i) The method comprises the following steps:
PPUSCH(i)＝min{PCMAX,10log10(MPUSCH(i))+PRB_MAX,10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)} [dBm]
wherein, PCMAXSetting the maximum configured transmitting power for the high-power cluster terminal;
MPUSCH(i) the size of the resource allocated for the PUSCH and effective in the ith subframe;
PO_PUSCH(j) is the PUSCH power initial value;
α (j) cell level parameters configured for higher layers;
PL is downlink path loss;
ΔTF(i) is the power offset;
f (i) adjusting the state parameter for the current PUSCH power control.
11. The high power cluster terminal of claim 10, further comprising: and the power grade reporting module is used for reporting the power grade or the terminal type to the eNB.
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