WO2019047877A1

WO2019047877A1 - Method for acquiring reference signal received power and network side device

Info

Publication number: WO2019047877A1
Application number: PCT/CN2018/104260
Authority: WO
Inventors: 李秋香; 李新; 徐芙蓉; 王军
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2017-09-06
Filing date: 2018-09-06
Publication date: 2019-03-14
Also published as: CN109462856A

Abstract

The present disclosure relates to the technical field of wireless communication. Provided are a method for acquiring a reference signal received power and a network side device. The method for acquiring a reference signal received power and applicable in a base station of a narrowband Internet of Things comprises: calculating on the basis of a base station transmission reference signal power RS_TxPwr, of a narrowband physical uplink shared channel power PNPUSCH,eNB and a terminal narrowband physical uplink shared channel uplink transmission power PNPUSCH,UE received by a base station side, and of an uplink-downlink path loss ΔPL according to a preset calculation rule to produce the reference signal received power of the location at where a terminal is found.

Description

Method for obtaining reference signal receiving power and network side device

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No.

Technical field

The present disclosure relates to the field of wireless communication technologies, and in particular, to a method for acquiring an RSRP and a network side device.

Background technique

One of the most important indicators for wireless network optimization is the Reference Signal Receiving Power (RSRP). Narrow Band Internet of Things (NB-IoT) cellular-based narrowband IoT systems do not support RSRP measurement reporting. RSRP is reported in functions such as Enhanced Cell-ID (ECID), but it does not have the versatility to fully evaluate network quality depending on the deployment and application of the positioning server. At present, there is no better solution on the base station side to assess the coverage level of the network. The distribution of IoT terminals is very wide. In particular, many terminals are distributed indoors. Road testing is unlikely to obtain comprehensive samples. The location of weak coverage of the network is more important. .

In summary, there is no RSRP measurement report in the NB-IoT in the related art, and the network cannot obtain the RSRP of the location where the UE (terminal) is located, and cannot locate the weak coverage.

Summary of the invention

The technical problem to be solved by the present disclosure is to provide a method for acquiring RSRP and a network side device, which can calculate the RSRP of the location of the terminal in the NB-IoT system, and then perform evaluation of the weak coverage area.

To solve the above technical problem, the embodiments of the present disclosure provide the following technical solutions:

In one aspect, a method for obtaining an RSRP is provided for use in a base station of an NB-IoT system, the method comprising:

The base station transmits the reference signal power RS_TxPwr, the base station side receives the NPUSCH power P _{NPUSCH, the eNB} and the terminal NPUSCH uplink transmission power P _{NPUSCH, and the UE} and the uplink and downlink path loss difference Δ _PL calculate the RSRP of the location where the terminal is located according to a preset calculation rule.

Further, before calculating the RSRP of the location of the terminal, the method further includes:

Receiving an uplink demodulation reference signal, and acquiring, from the uplink demodulation reference signal, an NPUSCH power P _{NPUSCH, eNB} received by the base station side.

Further, the base station transmits the reference signal power RS_TxPwr, the NPUSCH power P _NPUSCH received by the base station side _{, the eNB} and the terminal NPUSCH uplink transmit power P _{NPUSCH, and the UE} and the uplink and downlink path loss difference Δ _{PL are} calculated according to a preset calculation rule. The location of the RSRP includes:

Calculate the RSRP of the location of the terminal by using the following formula:

RSRP = RS_TxPwr - (P _{NPUSCH, UE -} P _{NPUSCH, eNB} + Δ _PL ).

Further, when the power headroom PH is less than or equal to 0, P _{NPUSCH, UE} = P _CMAX , where P _CMAX is the maximum transmit power of the terminal;

When the PH is greater than 0, P _{NPUSCH, UE} = P _{CMAX -} PH.

Further, before calculating the RSRP of the location of the terminal, the method further includes the step of acquiring a power headroom, where the step of acquiring the power headroom includes:

Receiving a MAC-CE, and obtaining power headroom information from the MAC-CE, where the power headroom information includes at least a power headroom level, and determining a value of the power headroom according to the obtained power headroom information.

Further, the determining the value of the power headroom according to the obtained power headroom information includes:

When the power headroom level is the power headroom level 1 or the power headroom level 2 in the normal coverage area, the value of the PH takes the intermediate value of the power margin level 1 or the power headroom level 2 corresponding to the value interval;

When the power headroom level is the power headroom level 3 under the normal coverage area, the PH value is not less than 11;

When the power headroom level is the power headroom level 3 under the coverage enhancement area, the PH value is not less than 6;

When the power headroom level is the power headroom level 0 in the normal coverage area, when the base station receiving power is not less than the target receiving power, the PH value is 2.5;

When the power headroom level is the power headroom level 2 under the coverage enhancement area, the PH value is 3 when it is determined that the base station received power is not less than the target received power.

Further, after the RSRP of the location of the terminal is calculated, the method further includes:

The calculated RSRP is sent to other network elements in the NB-IoT system in a preset interface format.

Further, the sending, by the calculated RSRP, the preset network interface to other network elements in the NB-IoT system includes:

After the RSRP is calculated, the RSRP is sent to other network elements in the NB-IoT system in the preset interface format. The preset interface format includes the following parameters: cell identifier, current time, and RSRP; or

The RSRP is sent to other network elements in the NB-IoT system in a preset interface format. The preset interface format includes the following parameters: a cell identifier, a current time, and a count value of different RSRP value intervals.

The embodiment of the present disclosure further provides a method for acquiring an RSRP, which is applied to other network elements except the base station of the NB-IoT system, where the method includes:

The base station receives the base station transmits a reference signal transmit power RS_TxPwr, NPUSCH station received power P _{NPUSCH, eNB} and the terminal NPUSCH uplink transmit power, the uplink and downlink path loss difference Δ _PL and a preset calculation rule;

The base station transmits the reference signal power RS_TxPwr, the NPUSCH power P _NPUSCH received by the base station side _{, and the eNB} and the terminal NPUSCH uplink transmit power and the uplink and downlink path loss difference Δ _PL calculate the RSRP of the location of the terminal according to the preset calculation rule.

Further, the method specifically includes:

Receiving parameters sent by the base station in a preset interface format, where the preset interface format includes one or more of the following parameters: a cell identifier, a current time, a maximum transmit power of the terminal, P _CMAX , and an NPUSCH power received by the base station _, P _{NPUSCH, eNB} , NPUSCH subcarrier number M _NPUSCH , terminal NPUSCH uplink transmission power P _{NPUSCH, UE} , MSG1 initial target received power P _{O_NPRACH} , MSG3 power offset Δ _Msg3 , uplink and downlink path loss difference Δ _PL .

The embodiment of the present disclosure further provides a base station, including a processor and a transceiver.

The processor is configured to use the base station to transmit the reference signal power RS_TxPwr, the NPUSCH power P _NPUSCH received by the base station side _{, the eNB} and the terminal NPUSCH uplink transmit power P _{NPUSCH, and the UE} and the uplink and downlink path loss difference Δ _{PL are} calculated according to a preset calculation rule. Location of the RSRP.

Further, the transceiver is configured to receive an uplink demodulation reference signal;

The processor is configured to obtain, from the uplink demodulation reference signal, an NPUSCH power P _{NPUSCH, an eNB,} received by the base station side.

Further, the processor is specifically configured to calculate the RSRP of the location of the terminal by using the following formula:

RSRP = RS_TxPwr - (P _{NPUSCH, UE -} P _{NPUSCH, eNB} + Δ _PL ).

When the PH is greater than 0, P _{NPUSCH, UE} = P _{CMAX -} PH.

Further, the transceiver is further configured to receive a MAC-CE;

The processor is further configured to obtain power headroom information from the MAC-CE, where the power headroom information includes at least a power headroom level, and determine a value of the power headroom according to the obtained power headroom information.

Further, the processor is specifically configured to: when the power headroom level is the power headroom level 1 or the power headroom level 2 in the normal coverage area, the value of the PH is corresponding to the power headroom level 1 or the power headroom level 2 The intermediate value of the value interval;

Further, the transceiver is further configured to send the calculated RSRP to other network elements in the NB-IoT system in a preset interface format.

Further, the transceiver is specifically configured to send the RSRP to other network elements in the NB-IoT system in a preset interface format after the RSRP is calculated. The preset interface format includes the following parameters: a cell identifier, Current time and RSRP; or

The embodiment of the present disclosure further provides a network element, including a processor and a transceiver.

The base station transceiver for receiving a base station transmits a reference signal power RS_TxPwr, NPUSCH station received power P _{NPUSCH, eNB} and the terminal NPUSCH uplink transmit power, the uplink and downlink path loss difference Δ _PL and a preset calculation rule;

The processor is configured to transmit the base station using a reference signal power RS_TxPwr, the base station side receives the NPUSCH power P _{NPUSCH, eNB} and the uplink transmit power and the terminal NPUSCH downlink path loss difference Δ _PL is calculated according to the preset calculation rule to obtain the location of the terminal is located RSRP.

Further, the transceiver is specifically configured to receive a parameter sent by the base station in a preset interface format, where the preset interface format includes one or more of the following parameters: a cell identifier, a current time, a maximum transmit power of the terminal, P _CMAX , NPUSCH power received by the base station _, P _{NPUSCH, eNB} , number of subcarriers of the _NPUSCH , M _NPUSCH , terminal NPUSCH uplink transmit power P _{NPUSCH, UE} , MSG1 initial target received power P _{O_NPRACH} , MSG3 power offset Δ _Msg3 , uplink and downlink path loss difference Δ _PL .

Embodiments of the present disclosure also provide a network side device, including a memory, a processor, and a computer program stored on the memory and executable on the processor; the processor implements the program as described above The method of obtaining RSRP.

Embodiments of the present disclosure also provide a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps in the method of acquiring RSRP as described above.

Embodiments of the present disclosure have the following beneficial effects:

In the above solution, in the random access procedure of the NB-IoT terminal, according to the base station transmitting reference signal power RS_TxPwr, the base station side receiving NPUSCH power P _{NPUSCH, the eNB} and the terminal NPUSCH uplink transmission power P _{NPUSCH, the UE} and the uplink and downlink path loss The difference Δ _PL and the preset calculation rule, using the symmetry of the system uplink and downlink, calculate the RSRP of the location of the terminal, and then can evaluate the network coverage, especially the evaluation of the weak coverage area.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings to be used in the embodiments of the present disclosure will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present disclosure, Those skilled in the art can also obtain other drawings based on these drawings without paying for creative labor.

FIG. 1 is a schematic flowchart of a method for obtaining an RSRP according to an embodiment of the present disclosure;

2 is a schematic flowchart of a method for acquiring an RSRP according to another embodiment of the present disclosure;

3 is a schematic diagram of reporting DV and PH in a MAC-CE;

4 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a network element according to an embodiment of the present disclosure.

Detailed ways

The technical problems, the technical solutions, and the advantages of the embodiments of the present disclosure will become more apparent from the following detailed description.

An embodiment of the present disclosure provides a method for acquiring an RSRP and a network side device, which can calculate an RSRP of a location of a terminal in an NB-IoT system, and perform an assessment of a weak coverage area.

An embodiment of the present disclosure provides a method for acquiring an RSRP, which is applied to a base station of an NB-IoT system. As shown in FIG. 1, the method includes:

Step 101: The base station transmits the reference signal power RS_TxPwr, the NPUSCH (narrowband physical uplink shared channel) power P _NPUSCH received by the base station side _{, the eNB} and the terminal NPUSCH uplink transmit power P _{NPUSCH, and the UE} and the uplink and downlink path loss difference Δ _{PL are} calculated according to a preset. The rule calculates the RSRP of the location where the terminal is located.

In this embodiment, during each random access procedure of the NB-IoT terminal, according to the base station transmitting reference signal power RS_TxPwr, the base station side receiving NPUSCH power P _{NPUSCH, the eNB} and the terminal NPUSCH uplink transmission power P _{NPUSCH, the UE} and the uplink and downlink The loss difference Δ _PL and the preset calculation rule, using the symmetry of the system uplink and downlink, calculate the RSRP of the location of the terminal, and then can evaluate the network coverage, especially the evaluation of the weak coverage area.

RSRP = RS_TxPwr - (P _{NPUSCH, UE -} P _{NPUSCH, eNB} + Δ _PL ).

When the PH is greater than 0, P _{NPUSCH, UE} = P _{CMAX -} PH.

The embodiment of the present disclosure further provides a method for acquiring an RSRP, which is applied to other network elements except the base station of the NB-IoT system. As shown in FIG. 2, the method includes:

Step 201: the base station receiving the base station transmits a reference signal transmit power RS_TxPwr, NPUSCH station received power P _{NPUSCH, eNB} and the terminal NPUSCH uplink transmit power, the uplink and downlink path loss difference Δ _PL and a preset calculation rule;

Step 202: the base station transmits a reference signal using a power RS_TxPwr, the base station side receives the NPUSCH power P _{NPUSCH, eNB} and the uplink transmit power and the terminal NPUSCH downlink path loss difference Δ _PL obtained location of the terminal is located according to the preset calculation rule is calculated RSRP.

Further, the method specifically includes:

The method for obtaining RSRP of the present disclosure is described in detail below:

In the related art system, the NB-IoT MSG3 uses the NPUSCH to report the data volume (Data Volume, DV) and PH in the MAC Media Access Control-Control Element (MAC-CE). The specific format is as shown in the figure. As shown in 3, the 2bit reserved field (R), 2bit represents PH, and 4bit represents DV. Where PH represents the difference between the maximum transmit power of the terminal and the expected transmit power of the current NPUSCH channel, and is transmitted only in MSG3.

The 2 bit PH represents 4 Power Headroom Levels.

PHPH	Power Headroom LevelPower Headroom Level
00	POWER_HEADROOM_0 POWER_HEADROOM_0
11	POWER_HEADROOM_1POWER_HEADROOM_1
22	POWER_HEADROOM_2POWER_HEADROOM_2
33	POWER_HEADROOM_3POWER_HEADROOM_3

Under normal coverage, the NB-IoT has a range of -23 to 11 dB for 4 Power Headroom Levels.

NB-IoT is in the enhanced coverage area, and the four Power Headroom Levels indicate that the PHR range is -23 to 6 dB.

In the NB-IoT system, the transmit power of the MSG3 is determined by the open loop power control algorithm.

If the Resource Unit (RU) Repetitions + Retransmission of the MSG3 uplink NPUSCH exceeds 2 times, the terminal transmits using the maximum power P _CMAX . Otherwise, the current transmit power of the terminal is calculated according to the uplink open loop power control algorithm:

The M _NPUSCH is a subcarrier format, and the value is {1/4, 1, 3, 6, 12}. The PL is the path loss, and the P _{o_NPUSCH} is the target received power of the MSG3, which can be obtained from the broadcast message and is the initial of the MSG1. The sum of the target received power and the power offset of the MSG3.

The present disclosure provides a method for obtaining an RSRP, and based on the received power of the MSG3 at the base station side and the PH carried in the MAC-CE, the RSRP of the location of the terminal is estimated, and the RSRP distribution of the entire network can be obtained from the network side.

Since PL _DL = RS_TxPwr - RSRP, PL _UL = P _{NPUSCH, UE -} P _{NPUSCH, eNB} ;

Therefore, RSRP = RS_TxPwr - (P _{NPUSCH, UE -} P _{NPUSCH, eNB} + Δ _PL ).

Among them, PL _DL is the downlink path loss, PL _UL is the uplink path loss, Δ _PL is the path loss difference caused by the uplink and downlink frequency, Δ _PL =PL _DL -PL _UL , which is a fixed value related to the uplink and downlink frequency difference. For example, the frequency difference between 953MHz and 908MHz is about 0.5dB. For a Frequency Division Duplexing (FDD) system, the uplink and downlink have symmetry, PL _DL = PL _UL + Δ _PL , and Δ _{PL is} often ignored.

If the RU resources of the MSG3 uplink NPUSCH are repeated (Repetitions+Retransmissions) more than 2 times, the terminal transmits at the maximum transmission power. Otherwise, when PH ≤ 0, PL is large, the terminal calculates according to Equation 1 that the terminal should transmit at the maximum transmit power. In both cases, P _{NPUSCH, UE} = P _CMAX .

Equation 1: RSRP = RS_TxPwr - (P _{CMAX -} P _{NPUSCH, eNB} + Δ _PL )

When PH>0 and PL is small, the terminal calculates the transmission power of the terminal according to Equation 2, P _{NPUSCH, UE} = P _{CMAX -} PH.

Equation 2: RSRP=RS_TxPwr–(P _CMAX -PH-P _{NPUSCH, eNB} +Δ _PL )

In the above RSRP calculation formula, the value of PH is obtained according to the range indicated by Power Headroom Level, as follows:

For Normal Coverage's POWER_HEADROOM_1, POWER_HEADROOM_2, PH>0, the PH takes the median of the interval. The RSRP calculation results have a certain deviation from the actual results, but the deviation range is about 1.5dB. The calculation results can accurately characterize RSRP.

For POWER_HEADROOM_3 of Normal Coverage and POWER_HEADROOM_3 of Enhcanced Coverage, PH≥11 or PH≥6, if PH is 11 or 6, the RSRP calculation result deviates from the actual result, depending on the deviation of the actual PH from 11 or 6. The RSRP can only represent a range, that is, RSRP ≥ RS_TxPwr - (P _{CMAX -} PH - P _{NPUSCH, eNB} + Δ _PL ), and the RSRP value cannot be accurately obtained, but the PH only affects samples with higher RSRP values. It is of little significance for the network to assess weak coverage areas and optimization.

For POWER_HEADROOM_0 of Normal Coverage and POWER_HEADROOM_2 of Enhcanced Coverage, the range of PH intervals includes positive values, 0 and negative values. The method of differentiation is as follows:

When the base station received power should be close to the target received power, that is, P _{NPUSCH, eNB} ≥ 10 * log 10 (M _NPUSCH ) + P _{O_NPUSCH} + Δ _PL ), at this time, it is determined that PH ≥ 0. At this time, POWER_HEADROOM_0 of Normal Coverage is characterized by PH=2.5dB. At this time, the POWER_HEADROOM_2 of the Enhcanced Coverage represents PH=3dB. At this time, the RSRP has a certain deviation from the actual value, and the deviation value is 2.5 and 3 dB.

When the base station received power should be lower than the target received power, that is, P _{NPUSCH, eNB} ≤ 10 * log 10 (M _NPUSCH ) + P _{O_NPUSCH} + Δ _PL ), and it is determined that PH < 0.

The M _NPUSCH is the number of subcarriers of the NPUSCH, and the P _{O_NPUSCH} is the initial target received power of the MSG3, which is a network broadcast parameter. For the NB-IoT, it is P _{O_NPRACH} + Δ _Msg3 , that is, the target received power of the MSG1 and the MSG3 power offset. Set the sum, P _{O_NPRACH} is the initial target received power of MSG1.

In summary, the values of PH in Equation 1 and Equation 2 for calculating RSRP are as follows:

Normal Coverage

Enhanced Coverage

In the embodiment of the present disclosure, the accuracy of RSRP estimation can be improved by subdividing the PH method.

In addition, in addition to the base station, other network elements, such as the Operation and Maintenance Center (OMC), can also obtain RSRP.

In an eNB BBU (baseband processing unit) device, when the terminal accesses the network, the parameters required for calculating the RSRP may be output to the OMC or other network element by using a certain interface format (including cell information, time, etc.), by the OMC or Other network elements calculate RSRP. This scheme can calculate the RSRP samples of the location where the UE is located at this time for all samples reporting the terminal power headroom. Example of interface format between an eNB BBU and an OMC (or other network element): {CellID, Time, P _CMAX , P _{NPUSCH, eNB} , M _NPUSCH , P _{NPUSCH, UE} , P _{O_NPRACH} , Δ _Msg3 , Δ _P _L }, where , Δ _Msg3 is the MSG3 power offset.

Alternatively, the eNB may directly calculate the RSRP based on the calculation methods of Equation 1 and Equation 2, and output the RSRP to the OMC or other network elements according to a certain interface format. An example of the output of the interface format is as follows:

1. The eNB BBU outputs the calculated RSRP to the OMC (or other network element) in a certain interface format. Example 1: {Cell ID, time, RSRP}, where the Cell ID is the cell identifier and the time is sent. time.

2. The eNB BBU outputs the Counter value of different RSRP intervals to the OMC (or other network element) according to a certain interface format according to a certain period (for example, 15 minutes). Example 2: {Cell ID, time, N0, N1, N2, N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N13, N14, N15, ...}. N0 to N15 and other values define the Counter value corresponding to different RSRP ranges.

The embodiment of the present disclosure further provides a base station, as shown in FIG. 4, including a processor 31 and a transceiver 32.

The processor 31 is configured to use a base station to transmit reference signal power RS_TxPwr, a base station side received NPUSCH power P _{NPUSCH, an eNB} and a terminal NPUSCH uplink transmit power P _{NPUSCH, and the UE} and the uplink and downlink path loss difference Δ _{PL are} calculated according to a preset calculation rule. RSRP where the terminal is located.

Further, the transceiver 32 is configured to receive an uplink demodulation reference signal;

The processor 31 is configured to obtain, from the uplink demodulation reference signal, an NPUSCH power P _{NPUSCH, eNB} received by the base station side.

Further, the processor 31 is specifically configured to calculate the RSRP of the location of the terminal by using the following formula:

RSRP = RS_TxPwr - (P _{NPUSCH, UE -} P _{NPUSCH, eNB} + Δ _PL ).

When the PH is greater than 0, P _{NPUSCH, UE} = P _{CMAX -} PH.

Further, the transceiver 32 is further configured to receive a MAC-CE;

The processor 31 is further configured to obtain power headroom information from the MAC-CE, where the power headroom information includes at least a power headroom level, and determine a value of the power headroom according to the obtained power headroom information.

Further, the processor 31 is specifically configured to: when the power headroom level is the power headroom level 1 or the power headroom level 2 in the normal coverage area, the value of the PH takes the power headroom level 1 or the power headroom level 2 Corresponding to the intermediate value of the value interval;

Further, the transceiver 32 is further configured to send the calculated RSRP to other network elements in the NB-IoT system in a preset interface format.

Further, the transceiver 32 is specifically configured to send the RSRP to other network elements in the NB-IoT system in a preset interface format after the RSRP is calculated. The preset interface format includes the following parameters: a cell identifier. , current time and RSRP; or

The embodiment of the present disclosure further provides a network element, as shown in FIG. 5, including a processor 41 and a transceiver 42,

The base station transceiver 42 for receiving a base station transmits a reference signal power RS_TxPwr, NPUSCH station received power P _{NPUSCH, eNB} and the terminal NPUSCH uplink transmit power, the uplink and downlink path loss difference Δ _PL and a preset calculation rule;

The processor 41 to utilize the base stations transmit a reference signal power RS_TxPwr, the base station side receives the NPUSCH power P _NPUSCH, loss difference between uplink and downlink channel transmitting power _eNB and the terminal NPUSCH Δ _PL calculation according to the preset calculation rule to obtain the terminal is located Location of the RSRP.

Further, the transceiver 42 is specifically configured to receive a parameter sent by the base station in a preset interface format, where the preset interface format includes one or more of the following parameters: a cell identifier, a current time, and a maximum transmit power of the terminal P _CMAX The NPUSCH power P _NPUSCH received by the base station side, the number of subcarriers M _{NPUSCH of the} _eNB and the NPUSCH, the uplink transmission power of the terminal NPUSCH P _{NPUSCH, the} initial target received power of the _UE , the MSG1 P _{O_NPRACH} , the power offset of the _MSG3 Δ _Msg3 , and the uplink and downlink path loss The difference Δ _PL .

Embodiments of the present disclosure also provide a network side device, including a memory, a processor, and a computer program stored on the memory and executable on the processor; the processor implements the program as described above The method of obtaining RSRP. The network side device may be a base station or other network element, such as an OMC.

Computer readable media includes both permanent and non-persistent, removable and non-removable media. Information storage can be implemented by any method or technology. The information can be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory. (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transportable media can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary storage of computer readable media (Transitory Media), such as modulated data signals and carrier waves.

The above description is only a preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present disclosure. The scope of protection of the present disclosure should be considered.

Claims

A method for obtaining an RSRP is applied to a base station of an NB-IoT system, and the method includes:

The base station transmits the reference signal power RS_TxPwr, the base station side receives the NPUSCH power P NPUSCH, the eNB and the terminal NPUSCH uplink transmission power P NPUSCH, and the UE and the uplink and downlink path loss difference Δ PL calculate the RSRP of the location where the terminal is located according to a preset calculation rule.
The method for obtaining an RSRP according to claim 1, wherein before the calculating the RSRP of the location of the terminal, the method further includes:

Receiving an uplink demodulation reference signal, and acquiring, from the uplink demodulation reference signal, an NPUSCH power P NPUSCH, eNB received by the base station side.
The method for acquiring an RSRP according to claim 1, wherein the base station transmits a reference signal power RS_TxPwr, a base station side received NPUSCH power P NPUSCH, an eNB and a terminal NPUSCH uplink transmission power P NPUSCH, a UE and an uplink and downlink path loss difference. Δ PL calculates the RSRP of the location of the terminal according to the preset calculation rule, including:

Calculate the RSRP of the location of the terminal by using the following formula:

RSRP = RS_TxPwr - (P NPUSCH, UE - P NPUSCH, eNB + Δ PL ).
A method of acquiring an RSRP according to claim 3, wherein

When the power headroom PH is less than or equal to 0, P NPUSCH, UE = P CMAX , where P CMAX is the maximum transmit power of the terminal;

When the PH is greater than 0, P NPUSCH, UE = P CMAX - PH.
The method for obtaining an RSRP according to claim 4, wherein before the calculating the RSRP of the location of the terminal, the method further comprises the step of acquiring a power headroom, wherein the step of acquiring the power headroom comprises:

Receiving a MAC-CE, and obtaining power headroom information from the MAC-CE, where the power headroom information includes at least a power headroom level, and determining a value of the power headroom according to the obtained power headroom information.
The method for obtaining an RSRP according to claim 5, wherein the determining the value of the power headroom based on the obtained power headroom information comprises:

When the power headroom level is the power headroom level 1 or the power headroom level 2 in the normal coverage area, the value of the PH takes the intermediate value of the power margin level 1 or the power headroom level 2 corresponding to the value interval;

When the power headroom level is the power headroom level 3 under the normal coverage area, the PH value is not less than 11;

When the power headroom level is the power headroom level 3 under the coverage enhancement area, the PH value is not less than 6;

When the power headroom level is the power headroom level 0 in the normal coverage area, when the base station receiving power is not less than the target receiving power, the PH value is 2.5;

When the power headroom level is the power headroom level 2 under the coverage enhancement area, the PH value is 3 when it is determined that the base station received power is not less than the target received power.
The method for obtaining an RSRP according to claim 1, wherein after the RSRP of the location of the terminal is calculated, the method further includes:

The calculated RSRP is sent to other network elements in the NB-IoT system in a preset interface format.
The method for obtaining an RSRP according to claim 7, wherein the sending the calculated RSRP to the other network elements in the NB-IoT system in a preset interface format includes:

After the RSRP is calculated, the RSRP is sent to other network elements in the NB-IoT system in the preset interface format. The preset interface format includes the following parameters: cell identifier, current time, and RSRP; or

The RSRP is sent to other network elements in the NB-IoT system in a preset interface format. The preset interface format includes the following parameters: a cell identifier, a current time, and a count value of different RSRP value intervals.
A method for obtaining an RSRP is applied to other network elements except the base station of the NB-IoT system, where the method includes:

The base station receives the base station transmits a reference signal transmit power RS_TxPwr, NPUSCH station received power P NPUSCH, eNB and the terminal NPUSCH uplink transmit power, the uplink and downlink path loss difference Δ PL and a preset calculation rule;

The base station transmits the reference signal power RS_TxPwr, the NPUSCH power P NPUSCH received by the base station side , and the eNB and the terminal NPUSCH uplink transmit power and the uplink and downlink path loss difference Δ PL calculate the RSRP of the location of the terminal according to the preset calculation rule.
The method for obtaining an RSRP according to claim 9, wherein the method specifically includes:

Receiving parameters sent by the base station in a preset interface format, where the preset interface format includes one or more of the following parameters: a cell identifier, a current time, a maximum transmit power of the terminal, P CMAX , and an NPUSCH power received by the base station , P NPUSCH, eNB , NPUSCH subcarrier number M NPUSCH , terminal NPUSCH uplink transmission power P NPUSCH, UE , MSG1 initial target received power P O_NPRACH , MSG3 power offset Δ Msg3 , uplink and downlink path loss difference Δ PL .
A base station including a processor and a transceiver

The processor is configured to use the base station to transmit the reference signal power RS_TxPwr, the NPUSCH power P NPUSCH received by the base station side , the eNB and the terminal NPUSCH uplink transmit power P NPUSCH, and the UE and the uplink and downlink path loss difference Δ PL are calculated according to a preset calculation rule. Location of the RSRP.
The base station according to claim 11, wherein

The transceiver is configured to receive an uplink demodulation reference signal;

The processor is configured to obtain, from the uplink demodulation reference signal, an NPUSCH power P NPUSCH, an eNB, received by the base station side.
The base station according to claim 11, wherein

The processor is specifically configured to calculate the RSRP of the location of the terminal by using the following formula:

RSRP = RS_TxPwr - (P NPUSCH, UE - P NPUSCH, eNB + Δ PL ).
The base station according to claim 13, wherein

When the power headroom PH is less than or equal to 0, P NPUSCH, UE = P CMAX , where P CMAX is the maximum transmit power of the terminal;

When the PH is greater than 0, P NPUSCH, UE = P CMAX - PH.
The base station according to claim 14, wherein

The transceiver is further configured to receive a MAC-CE;

The processor is further configured to obtain power headroom information from the MAC-CE, where the power headroom information includes at least a power headroom level, and determine a value of the power headroom according to the obtained power headroom information.
The base station according to claim 15, wherein

The processor is specifically configured to: when the power headroom level is the power headroom level 1 or the power headroom level 2 in the normal coverage area, the value of the PH takes the power margin level 1 or the power headroom level 2 corresponding to the value interval. Intermediate value

When the power headroom level is the power headroom level 3 under the normal coverage area, the PH value is not less than 11;

When the power headroom level is the power headroom level 3 under the coverage enhancement area, the PH value is not less than 6;

When the power headroom level is the power headroom level 0 in the normal coverage area, when the base station receiving power is not less than the target receiving power, the PH value is 2.5;

When the power headroom level is the power headroom level 2 under the coverage enhancement area, the PH value is 3 when it is determined that the base station received power is not less than the target received power.
The base station according to claim 11, wherein

The transceiver is further configured to send the calculated RSRP to other network elements in the NB-IoT system in a preset interface format.
The base station according to claim 17, wherein

The transceiver is specifically configured to send the RSRP to other network elements in the NB-IoT system in a preset interface format after the RSRP is calculated. The preset interface format includes the following parameters: a cell identifier, a current time, and RSRP; or

The RSRP is sent to other network elements in the NB-IoT system in a preset interface format. The preset interface format includes the following parameters: a cell identifier, a current time, and a count value of different RSRP value intervals.
A network element, including a processor and a transceiver,

The base station transceiver for receiving a base station transmits a reference signal power RS_TxPwr, NPUSCH station received power P NPUSCH, eNB and the terminal NPUSCH uplink transmit power, the uplink and downlink path loss difference Δ PL and a preset calculation rule;

The processor is configured to transmit the base station using a reference signal power RS_TxPwr, the base station side receives the NPUSCH power P NPUSCH, eNB and the uplink transmit power and the terminal NPUSCH downlink path loss difference Δ PL is calculated according to the preset calculation rule to obtain the location of the terminal is located RSRP.
The network element according to claim 19, wherein

The transceiver is specifically configured to receive a parameter sent by the base station in a preset interface format, where the preset interface format includes one or more of the following parameters: a cell identifier, a current time, a maximum transmit power of the terminal, a C CMAX , and a base station side receiving. The received NPUSCH power P NPUSCH, eNB , NPUSCH subcarrier number M NPUSCH , terminal NPUSCH uplink transmission power P NPUSCH, UE , MSG1 initial target received power P O_NPRACH , MSG3 power offset Δ Msg3 , and uplink and downlink path loss difference Δ PL .
A network side device comprising a memory, a processor, and a computer program stored on the memory and operable on the processor; the processor executing the program implements any one of claims 1-8 The method for acquiring an RSRP according to claim 9 or 10, or the method for acquiring an RSRP according to claim 9 or 10 when the program is executed.
A computer readable storage medium having stored thereon a computer program, the program being executed by a processor, implementing the steps in the method of obtaining an RSRP according to any one of claims 1-8, or implementing the method of claim 9 or The steps in the method of obtaining RSRP described in 10.