CN106572478B

CN106572478B - Method and base station for constructing wireless grid

Info

Publication number: CN106572478B
Application number: CN201611001288.XA
Authority: CN
Inventors: 黄黎; 张�浩; 孙铭扬; 杨迥迥
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Shanghai Huawei Technologies Co Ltd
Priority date: 2016-11-14
Filing date: 2016-11-14
Publication date: 2020-09-08
Anticipated expiration: 2036-11-14
Also published as: WO2018086415A1; CN106572478A

Abstract

The embodiment of the invention discloses a method for constructing a wireless grid, which comprises the following steps: the method comprises the steps that a first base station obtains first uplink Reference Signal Received Power (RSRP) through measuring a Sounding Reference Signal (SRS) sent by target User Equipment (UE), the target UE is the UE in a serving cell where the first base station is located, the first base station obtains first transmitting power of the SRS sent by the target UE, the first base station obtains first uplink path loss of the SRS sent by the target UE according to the first transmitting power and the first uplink RSRP through calculation, the first base station receives second uplink path loss sent by an adjacent base station, and the first base station constructs a wireless grid according to the first uplink path loss and the second uplink path loss. In this way, since the receiving and measuring capabilities of the base stations are much larger than those of the UE, generally, information transmitted by one UE can be received by a plurality of surrounding base stations, and therefore, a wireless grid constructed by acquiring uplink loss of the UE through the base stations is more accurate, thereby improving the positioning of the UE position.

Description

Method and base station for constructing wireless grid

Technical Field

The present invention relates to the field of communications, and in particular, to a method and a base station for constructing a wireless grid.

Background

Due to the popularization of smart phones and the development of mobile network services, the communication data volume of a Long term evolution (Long term evolution, LTE) wireless network (4G) is increasing, and the communication capacity that a single wireless frequency band can provide is limited, so operators generally provide larger communication capacity by adding more wireless frequency bands. Due to the frequency difference and deployment difference of different radio frequency bands, the channel quality of different radio frequency bands in the same location may have a large difference, and therefore, the User Equipment (User Equipment, abbreviated as UE) needs to measure the channel quality of each frequency band. However, due to constraints in cost, power consumption, volume and the like, it is difficult for the UE to have the capability of simultaneously and concurrently measuring the channel quality of many frequency bands, and the common method is to measure the channel quality of each frequency band by dividing into multiple times and in turn. According to the LTE protocol mechanism, the UE needs to select a frequency band as a main service frequency band, and then measure the channel quality of other frequency bands (called pilot frequency measurement). In order to perform inter-frequency measurement, the UE needs to interrupt the ongoing communication in the primary service frequency band for a period of time, and use the period of time to measure other frequency bands, which is called Gap measurement. In order to measure the channel quality of multiple different frequency bands, the UE needs to perform multiple Gap measurements. Gap measurement can interrupt the current communication of the UE, so that the data transmission rate of the UE is reduced, and the service experience of a user is poor; the multi-band rotating Gap measurement also causes the measurement period of each frequency band to be lengthened, the effectiveness of the measurement result is deteriorated, and the upper layer function is affected (for example, the AMC effect is deteriorated).

In order to solve the problem, one existing technical scheme is as follows: the base station memorizes (stores) the channel quality of different frequency bands at different positions, and after the UE enters a certain position, the base station can directly acquire the channel quality of each frequency band at the position from the memory. The specific method of the technical scheme is that in the initial stage, UE measures the quality of the pilot frequency channel by the Gap measurement of the old method, and when the UE reports the measurement result of the pilot frequency channel to the base station, a new process is added: the base station acquires the position of the UE and records the pilot frequency measurement result corresponding to the position. After a period of time, as more and more UEs make such Gap measurements and records of corresponding positions, the base station gradually forms a similar "position: a database of channel quality in band 1, channel quality in band 2, …, channel quality in band n, which is slowly grown and completed and after a certain time, the channel quality in each band at most locations served by the base station can be recorded. For subsequent UE, the position of the UE can be determined firstly, then the corresponding record is searched in the database according to the position, the channel quality of each pilot frequency channel at the position is directly obtained from the record, and the UE is not required to perform Gap measurement. For determining the position of the UE, the position is determined in the prior art by a radio grid constructed by the UE to measure the downlink Reference Signal Received Power (RSRP) of the serving cell and the neighboring cells.

Generally, when the number of downlink RSRPs of the neighboring cell measured by the UE is larger, the position of the UE is more accurately located, for example, the UE can measure the downlink RSRP of 3 cells, and 3 circles generally intersect at a single intersection point. However, in an actual network, due to the measurement capability of the UE and the mutual interference between neighboring cells, the number of downlink neighboring cells measured by the UE at the serving cell/near point location is very limited, and the number of RSRP of cells measured in a considerable part of the cell is less than or equal to 2, in which case the radio grid cannot accurately locate the UE.

Disclosure of Invention

The embodiment of the invention provides a method and a base station for constructing a wireless grid, which are used for improving the positioning of the position of UE.

A first aspect of the invention provides a method of constructing a wireless grid, comprising:

the first base station receives an SRS sent by a served target UE, and then obtains a first uplink RSRP by measuring the SRS. And the first base station acquires the first transmission power of the SRS transmitted by the target UE, wherein the first transmission power comprises two conditions of full power transmission and non-full power transmission of the target UE. After acquiring the first uplink RSRP and the first transmission power, the first base station calculates and obtains a first uplink path loss of the SRS sent by the target UE according to the first transmission power and the first uplink RSRP. The first base station and the adjacent base station of the adjacent area can share the same SRS resource, so that wireless signals in the cell of the first base station and the cell of the adjacent base station cannot interfere with each other, the first base station and the adjacent base station of the adjacent area of the first base station also acquire the SRS sent by the target UE while receiving the SRS sent by the target UE, and then measure the SRS to obtain a second uplink RSRP, acquire a second transmitting power and calculate a second uplink loss. And after the adjacent base station calculates the second uplink loss, the second uplink loss is sent to the first base station, and the first base station constructs a wireless grid according to the first uplink loss and the second uplink loss. In addition, the neighboring base station is a neighboring base station of the first base station, and the neighboring base station of the first base station generally includes more than one, for example, three or four, and the more neighboring base stations participating in the measurement, the more uplink loss is obtained, so that the more accurate the wireless grid constructed by the first base station is. In this way, since the receiving and measuring capabilities of the base stations are much larger than those of the UE, generally, information transmitted by one UE can be received by a plurality of surrounding base stations, and therefore, a wireless grid constructed by acquiring uplink loss of the UE through the base stations is more accurate, thereby improving the positioning of the UE position.

In a possible implementation manner, the obtaining, by the first base station, the first transmission power for the target UE to transmit the SRS may be:

the first base station receives PHR periodically transmitted by target UE, and then calculates the PUSCH use power of the PHR transmitted by the UE according to the PHR. And the first base station calculates the target transmitting power according to the PUSCH use power and takes the target transmitting power as the first transmitting power of the target UE for sending the SRS.

Because the period for the target UE to send the PHR may be set by the first base station, in a shorter period, the power control adjustment amount of the target UE may be ignored, or the period for the first base station to set the target UE to send the PHR is completely consistent with the period for the target UE to send the SRS, so the target transmission power calculated by the PHR reported by the target UE may be equivalent to the first transmission power for the target UE to send the SRS.

In another possible implementation manner, a specific calculation formula in which the first base station calculates the target transmission power according to the PUSCH use power, and uses the target transmission power as the first transmission power for the target UE to transmit the SRS includes:

P_SRS(i)＝P_{SRS_OFFSET}+10log₁₀(M_SRS)+P_{o_PUSCH}(j)+P_PUSCH(i')-(10log₁₀(M_PUSCH(i'))+P_{o_PUSCH}(j)+Δ_TF(i'))

wherein i represents a subframe used by the target UE for transmitting the SRS, i' represents a subframe used by the target UE for transmitting the PHR, and P_SRS(i) Denotes a first transmission power, P, of a target UE transmitting an SRS in subframe i_{SRS_OFFSET}Dedicated default parameter, M, representing target UE_SRSRepresents the transmission bandwidth, P, of the SRS at sub-frame time i_{o_PUSCH}(j) Representing power control parameters, P, of the PUSCH channel_PUSCH(i') denotes PUSCH used power, P_PUSCH(i') is the maximum transmit power of the target UE minus the PHR, M_PUSCH(i ') denotes the size of the resource allocated for PUSCH within subframe i', Δ_TF(i) Indicates the power adjustment amount determined by the modulation scheme selected for PUSCH transmission in the i' th subframe.

In another possible implementation manner, when the time when the target UE transmits the SRS is different from the time when the target UE transmits the PHR, the first transmission power of the target UE for transmitting the SRS is:

the target transmission power is calculated when the UE sends the PHR last time before the SRS is sent by the UE, and the transmission power change caused by the power control parameter change is the transmission power change caused by the power control parameter change during the period from the PHR sent by the UE last time to the SRS sent by the UE, which is recorded by the first base station.

When the first base station sets that the period for the target UE to send the PHR is relatively long and the period for the target UE to send the SRS is relatively short, the target UE may send the SRS for multiple times in the time period for the target UE to send the PHR once, so that a large error may be caused.

A second aspect of the invention provides a method of constructing a wireless grid, comprising:

the adjacent base station is a base station adjacent to the first base station and used for assisting in measuring and calculating the uplink path loss of the target UE, firstly receives an SRS sent by the target UE, and then obtains a second uplink path loss by measuring the SRS. And the adjacent base station acquires second transmitting power of the SRS sent by the target UE, wherein the second transmitting power comprises two conditions of full power sending and non-full power sending of the target UE. And after the adjacent base station acquires the second uplink RSRP and the second transmitting power, calculating to obtain a second uplink path loss of the SRS sent by the target UE according to the second transmitting power and the second uplink RSRP. And the adjacent base station sends the second uplink loss to the first base station, so that the first base station constructs a wireless grid according to the first uplink loss measured and calculated by the first base station and the received second uplink loss. In addition, the neighboring base station is a neighboring base station of the first base station, and the neighboring base station of the first base station generally includes more than one, for example, three or four, and the more neighboring base stations participating in the measurement, the more uplink loss is obtained, so that the more accurate the wireless grid constructed by the first base station is. In this way, since the receiving and measuring capabilities of the base stations are much larger than those of the UE, generally, information transmitted by one UE can be received by a plurality of surrounding base stations, and therefore, a wireless grid constructed by acquiring uplink loss of the UE through the base stations is more accurate, thereby improving the positioning of the UE position.

A third aspect of the present invention provides a base station, including:

an obtaining unit, configured to obtain, by measuring a sounding reference signal SRS sent by a target user equipment UE, a first uplink reference signal received power RSRP, where the target UE is a UE in a serving cell where a base station is located;

the obtaining unit is further configured to obtain a first transmission power of the target UE for transmitting the SRS;

the calculating unit is used for calculating and obtaining a first uplink path loss of the SRS sent by the target UE according to the first transmitting power and the first uplink RSRP;

the receiving unit is used for receiving a second uplink loss sent by the adjacent base station, wherein the second uplink loss is obtained by the adjacent base station through calculation according to a second uplink RSRP and a second transmitting power, the second uplink RSRP is obtained by measuring an SRS sent by a target UE by the adjacent base station, and the second transmitting power is obtained by obtaining the transmitting power obtained by sending the SRS by the target UE by the adjacent base station;

and a constructing unit, configured to construct the wireless grid according to the first uplink loss and the second uplink loss.

A fourth aspect of the present invention provides a base station, comprising:

an obtaining unit, configured to obtain, by measuring a sounding reference signal SRS sent by a target user equipment UE, a first uplink reference signal received power RSRP, where the target UE is a UE in a serving cell where a first base station is located;

the obtaining unit is further configured to obtain a second transmission power of the SRS sent by the target UE;

the calculating unit is used for calculating a second uplink path loss of the SRS sent by the target UE according to the second transmitting power and the second uplink RSRP;

and a sending unit, configured to send the second uplink loss to the first base station.

A fifth aspect of the present invention provides a base station, comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus, the memory stores computer instructions, and the processor is used for realizing the following method by executing the computer instructions:

acquiring first uplink Reference Signal Received Power (RSRP) by measuring a Sounding Reference Signal (SRS) sent by target User Equipment (UE), wherein the target UE is the UE in a serving cell in which a base station is located;

acquiring first transmission power of SRS transmitted by target UE;

calculating to obtain a first uplink path loss of the SRS sent by the target UE according to the first transmitting power and the first uplink RSRP;

receiving a second uplink path loss sent by the adjacent base station, wherein the second uplink path loss is obtained by the adjacent base station through calculation according to a second uplink RSRP and a second transmitting power, the second uplink RSRP is obtained by measuring an SRS sent by the target UE by the adjacent base station, and the second transmitting power is obtained by obtaining the transmitting power obtained by sending the SRS by the target UE by the adjacent base station;

and constructing a wireless grid according to the first uplink loss and the second uplink loss.

A sixth aspect of the present invention provides a base station, comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus, the memory stores computer instructions, and the processor is used for realizing the following method by executing the computer instructions:

acquiring first uplink Reference Signal Received Power (RSRP) by measuring a Sounding Reference Signal (SRS) sent by target User Equipment (UE), wherein the target UE is the UE in a service cell where a first base station is located;

acquiring second transmitting power of SRS sent by target UE;

calculating to obtain a second uplink path loss of the SRS sent by the target UE according to the second transmitting power and the second uplink RSRP;

and sending the second uplink loss to the first base station.

A seventh aspect of the present invention provides a storage medium having program code stored therein, which when executed performs the method of constructing a wireless grid as provided in the first aspect or any one of the implementations of the first aspect or the second aspect. The storage medium includes, but is not limited to, a flash memory (english: flash memory), a hard disk (HDD) or a Solid State Drive (SSD).

According to the technical scheme, the embodiment of the invention has the following advantages:

in the invention, a first base station acquires a first uplink Reference Signal Received Power (RSRP) by measuring a Sounding Reference Signal (SRS) sent by target User Equipment (UE), the target UE is the UE in a serving cell where the first base station is located, the first base station acquires first transmission power of the SRS sent by the target UE, the first base station calculates a first uplink path loss of the SRS sent by the target UE according to the first transmission power and the first uplink RSRP, the first base station receives a second uplink path loss sent by an adjacent base station, the second uplink path loss is calculated by the adjacent base station according to the second uplink RSRP and a second transmission power, wherein the second uplink RSRP is acquired by measuring the SRS sent by the target UE by the adjacent base station, the second transmission power is acquired by acquiring the SRS sent by the target UE by the adjacent base station, and the first base station constructs a wireless grid according to the first uplink path loss and the second uplink path loss. In this way, since the receiving and measuring capabilities of the base stations are much larger than those of the UE, generally, information transmitted by one UE can be received by a plurality of surrounding base stations, and therefore, a wireless grid constructed by acquiring uplink loss of the UE through the base stations is more accurate, thereby improving the positioning of the UE position.

Drawings

FIG. 1 is a schematic diagram of an application system architecture of a method for constructing a wireless grid according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a method of constructing a wireless grid in accordance with an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating target UE transmitting SRS and PHR in an embodiment of the present invention;

FIG. 4 is a diagram of a binary radio grid constructed by a first base station in accordance with an embodiment of the present invention;

FIG. 5 is a diagram of a first base station in an embodiment of the invention;

FIG. 6 is a diagram illustrating neighboring base stations according to an embodiment of the present invention;

FIG. 7 is another diagram of a first base station according to an embodiment of the present invention;

fig. 8 is another diagram of a neighboring base station in an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, fig. 1 is a schematic diagram of a system architecture for constructing a wireless grid according to an embodiment of the present invention, the schematic diagram includes: the method comprises the following steps that a target UE, a first base station and four adjacent base stations are arranged, wherein the first base station is a base station in a serving cell of the target UE, the four base stations are base stations in cells adjacent to the serving cell, the first base station takes all UEs in the cells served by the first base station and the adjacent base stations as UEs in the same virtual cell, so that the cells served by the first base station and all UEs in the cells served by the adjacent base stations share the same cell-level Sounding Reference Signal (SRS) resource, the first base station allocates the target SRS resource for the target UE, the target UE sends SRS through the target SRS resource, the first base station and the four adjacent base stations respectively measure the SRS, and accordingly respectively obtain uplink Reference Signal received Power (SRS received Power, english abbreviation: RSRP), the first base station and four adjacent base stations respectively acquire the transmitting power of the target UE for sending the SRS, then respectively calculate the path loss of the SRS sent by the UE, the four adjacent base stations send the calculated path loss to the first base station, and the first base station constructs a wireless grid according to the calculated path loss and the received path loss.

Referring to fig. 2, one embodiment of a method of constructing a wireless grid in an embodiment of the invention includes:

101. the method comprises the steps that a first base station obtains first uplink Reference Signal Received Power (RSRP) through measuring a Sounding Reference Signal (SRS) sent by target User Equipment (UE), wherein the target UE is the UE in a service cell where the first base station is located.

In an LTE architecture, a base station accurately acquires uplink RSRP by measuring an SRS sent by UE, when the base station needs to acquire the channel quality of the UE in a served cell, the position of the UE needs to be positioned, the base station positions the UE through a wireless grid, firstly, the base station needs to construct an accurate wireless grid, the UE can send the SRS to the base station according to a certain period, the base station acquires the uplink RSRP by measuring the SRS sent by the UE, and then, the uplink RSRP is used for carrying out subsequent steps of calculating uplink loss and constructing the wireless grid. Therefore, in the embodiment of the present invention, the first base station needs to first obtain the first uplink RSRP through the SRS sent by the measurement target UE.

In the embodiment of the present invention, the first base station constructs the wireless grid, and not only the first base station is required to calculate the uplink loss of the UE transmitting the SRS, but also the adjacent base station is required to calculate the uplink loss of the UE transmitting the SRS, and the first base station can construct the wireless grid through a plurality of uplink losses. Therefore, the SRS transmitted by the target UE needs to be received not only by the first base station in the cell where the target UE is located, but also by the neighboring base stations of the neighboring cells. Optionally, in this embodiment of the present invention, the first base station uses all UEs in a cell served by the first base station and a cell served by an adjacent base station as UEs in the same virtual cell, so that the cell served by the first base station and all UEs in a cell served by an adjacent base station share the SRS resource of the same cell level. Therefore, all the UEs in a plurality of cells (called cooperative measurement cell Group) which are mutually cooperative measurement adjacent cells in a small area are regarded as sharing the same cell-level SRS resource, when the SRS resource is distributed to the UEs, not only the SRS resource among the UEs in the cells is ensured not to conflict, but also the SRS resource among the UEs in the whole cooperative measurement cell Group is ensured to be staggered, so that the problem of mutual interference of signals among the cells is avoided, the SRS of one UE can be measured by a plurality of adjacent cells, and the problem of too few measurement adjacent cells does not exist basically.

102. And the first base station acquires first transmission power of the target UE for transmitting the SRS.

In LTE, the uplink RSRP cannot be directly used to construct a radio grid, because LTE has an uplink power control mechanism, which makes the uplink RSRP of two UEs measured by the base station not differ too much, and it is likely that the uplink RSRP of two UEs are nearly equal. The reason is that, according to the uplink power control mechanism, in order to reduce the power consumption of the UE and also in order to reduce the interference of the uplink signal of the UE in the cell to the uplink signal of the UE in the neighboring cell, the base station and the UE cooperate with each other to control the transmission power of the uplink signal of the UE, that is, the uplink transmission power is controlled to a "just right" level: on the basis of ensuring that the signal quality is good enough when the uplink signal reaches the base station, the transmitting power of the UE is made as small as possible, and the function is called uplink power control. For example, two UEs, the first UE is close to the base station, and the attenuation and quality of the signal arriving at the base station are reduced, so the base station will instruct the UE to reduce the transmission power; and the second UE is further away from the base station, the base station may instruct it to increase the transmit power to achieve a good enough signal reception quality. After power control adjustment, the transmission power of two UEs increases and decreases, and finally the uplink RSRP measured by the base station may be approximately equal, and a wireless grid constructed by the uplink RSRP may confuse positions far apart into the same wireless grid, which may cause the wireless grid to fail to effectively identify different UE positions.

In essence, the basic principle behind the wireless grid, which can be used to identify the UE location, is: the power of the wireless signal is attenuated in the process of propagation, and the power attenuation is larger as the distance is longer, so that the power attenuation actually contains distance information and further contains position information. The relation between RSRP and signal power attenuation is: the RSRP is the transmission power of the transmitting end-the signal propagation attenuation power, and therefore, the RSRP implies the attenuation power, and indirectly implies the UE distance/location information. Since "RSRP" and "signal propagation attenuation power" are in one-to-one correspondence, constructing a wireless grid directly with downlink RSRP has the same effect on location identification as constructing a wireless grid with "signal propagation attenuation power". The "signal propagation attenuation power" is generally called Path Loss (Path Loss), which is abbreviated as Path Loss.

The uplink RSRP cannot be used to construct the radio grid due to the aforementioned uplink power control. Therefore, in the embodiment of the present invention, it is necessary to return to the original source, and use the "signal propagation attenuation power" for constructing the wireless grid, that is, constructing the wireless grid through the uplink loss. The equation "RSRP" is converted into the transmission power-path loss at the transmitting end, and the "path loss" is obtained, and applied to the uplink, the equation "RSRP" becomes the transmission power-uplink RSRP of the UE. Then, in order to obtain accurate uplink path loss, it is critical to obtain accurate uplink SRS transmission power.

According to the LTE protocol, the power when the UE transmits the SRS is determined according to the following formula:

P_SRS(i)＝min{P_CMAX,P_{SRS_OFFSET}+10log₁₀(M_SRS)+P_{o_PUSCH}(j)+α(j)·PL+f(i)}

the above formula can be divided into two cases, UE full power transmission and UE not full power transmission.

P_CMAXThe base station is informed by the UE in a signaling message, typically 23dBm, representing the maximum transmit power of the UE. Therefore, if the UE transmits at full power (the UE is far from the serving cell), and the "transmit power of the UE" is a fixed known value of 23dBm, the uplink loss can be obtained from the "PCMAX — uplink RSRP".

If the UE is not in full power transmission, the SRS transmission power formula of the UE is:

P_SRS(i)＝P_{SRS_OFFSET}+10log₁₀(M_SRS)+P_{o_PUSCH}(j)+α(j)·PL+f(i)

the fourth item α (j) PL, wherein α (j) is also the parameter configured by the base station to the UE and is between 0 and 1, but PL is the downlink Loss (PL is the abbreviation of Path Loss/Loss) measured by the UE, the downlink Loss UE does not know the base station, the fifth item f (i) is also the transmission power adjustment parameter configured by the base station to the UE, and the parameter is an accumulated quantity that the base station issues a transmission power adjustment parameter delta p at the moment i_iTo the UE, the UE receives the parameter, but the amount of power adjustment that the UE ultimately applies is

That is, the UE finally applies Δ p delivered from the 1 st time₁(the base station sends an instruction to the UE, the instruction is increased and decreased every time, the base station side finds that the signal of the UE reaches the base station too weak, the base station sends an instruction, such as 3dB, which indicates the UE to increase the transmission power by 3dB, when the interference of the UE is reduced, or the UE is closer to the base station, the base station finds that the signal is better, the base station sends an instruction again, such as 2dB reduction, so as to add the instructions cumulatively) until the instruction is sent last timeΔp_iThe cumulative value of (2). At { Δ p_kWhen k is 1, 2, …, i, there is a certain error probability in UE reception, i.e. there is a part Δ p_kIt is possible that the value demodulated by the UE is not the value transmitted by the base station. Thus, the base station side and the UE side are respectively recorded

There may be a difference. And delivered ap over time_kMore and more, Δ p of UE demodulation errors_kThe number of the base station and the UE is more and more, and the difference of f (i) on the base station side and the UE side is larger and larger. This may cause an error in calculation of "transmission power of UE" by the base station, and further cause an error in calculation of uplink loss. To summarize, because 1) how much downlink PL the base station cannot obtain the UE measures (the UE will report to the base station, but the reporting period is long, the base station needs a long time to know), and 2) f (i) of the base station and the UE may be biased and continuously expanded (there is a probability that the base station has an error when sending each command, and the base station does not know whether the sent command is received by the UE), the base station cannot directly calculate the transmission power of the UE according to the SRS transmission power formula of the UE.

Therefore, optionally, in the embodiment of the present invention, the Power headroom (full name: Power Head Room, abbreviated as PHR) reported by the UE to the base station may be utilized (the UE reports to the base station how much Power is left in the current transmission at intervals). That is, the first base station calculates, according to the received power consumption headroom PHR sent by the target UE, the physical uplink shared channel PUSCH usage power that the UE sends the PHR. And the first base station calculates a target transmission power according to the PUSCH use power, and uses the target transmission power as a first transmission power for the target UE to transmit the SRS.

The meaning of PHR is that, for the current uplink Physical Uplink Shared Channel (PUSCH) transmission, power used by the UE for transmitting the PUSCH is removed, and how much power remains, that is, PHR is the maximum UE transmission power — power used by the current PUSCH transmission (how much power the UE needs to use). According to the LTE protocol, the base station may configure the UE to periodically report the PHR.

When the base station receives the PHR report of the UE, the formula is simply deformed and easily obtained according to the PHR which is the maximum transmitting power of the UE and the power used by the PUSCH transmission: the power used by the current PUSCH transmission is equal to the maximum transmission power of the UE — PHR.

According to the LTE protocol, the PUSCH transmission power calculation formula is as follows:

P_PUSCH(i)＝10log₁₀(M_PUSCH)+P_{o_PUSCH}(j)+Δ_TF(i)+α(j)·PL+f(i)

comparing the foregoing SRS transmission power calculation formula:

P_SRS(i)＝P_{SRS_OFFSET}+10log₁₀(M_SRS)+P_{o_PUSCH}(j)+α(j)·PL+f(i)

it can be seen that the PUSCH transmission power formula is very similar to the SRS transmission formula, and most importantly, the base station cannot accurately obtain two terms α (j), PL and f (i) of UE transmission, and both transmission power calculation formulas are included_PUSCH(i) Then, α (j) · PL + f (i) ═ P can be calculated based on the above calculation formula_PUSCH(i)-(10log₁₀(M_PUSCH)+P_{o_PUSCH}(j)+Δ_TF(i) Because the right part in parentheses of the equation is a parameter determined by the base station and is a known value of the base station. Therefore, the following formula can be derived to calculate the transmission power of the UE transmitting SRS:

wherein i represents a subframe used by the target UE for transmitting the SRS, i' represents a subframe used by the target UE for transmitting the PHR, and P_SRS(i) Represents a first transmission power, P, of the target UE in subframe i to transmit the SRS_{SRS_OFFSET}Dedicated presets representing the target UEParameter, M_SRSRepresents the transmission bandwidth, P, of the SRS at sub-frame i_{o_PUSCH}(j) Representing a power control parameter, P, of the PUSCH channel_PUSCH(i') denotes PUSCH used power, P_PUSCH(i') the value of which is the maximum transmission power of the target UE minus PHR, M reported by the UE_PUSCH(i ') denotes the size of the resource allocated for PUSCH within subframe i', Δ_TF(i ') indicates the power adjustment amount determined by the modulation scheme selected for PUSCH transmission in the i' th subframe, and the base station notifies UE. that information is reported by the PHR of the UE, and although the base station still cannot know the accurate values of α (j) · PL and f (i), the base station can obtain the accurate values of α (j) · PL + f (i), which is sufficient for calculating the SRS transmission power.

The specific algorithm is as follows:

firstly, calculating the PUSCH transmission power of the UE at the nth PHR reporting time: and obtaining the transmission power normalized to each RE according to the RE number contained in the transmission bandwidth of the PUSCH: UE maximum transmit power-PHR-10 log (M)_PUSCH) Wherein M is_PUSCHRepresents the number of REs contained in the PUSCH transmission at the nth PHR reporting (since the total transmit power of the UE increases as the number of REs transmitted increases, it is necessary to average the transmit power of a single RE over each RE to more accurately characterize the transmit power level at which the UE is located). Then adding the SRS transmission power and the offset P of the PUSCH transmission power_{SRS_OFFSET}(since the LTE protocol specifies that an offset P can be configured between the transmission power of each RE of the SRS channel and the transmission power of each RE of the PUSCH channel_{SRS_OFFSET}) Then, the reference power of an RE transmitted by the SRS during the nth PHR report to the (n + 1) th PHR report is obtained: p_{SRS per RE basis}UE maximum transmit power-PHR-10 log (M)_PUSCH)+P_{SRS_OFFSET}. However, the reference of each RE of the PSRS is not the real SRS transmission power, because the SRS transmission time is often different from the PHR reporting time, there is a certain time interval; and the SRS transmission period/frequency and the PHR reporting period/frequency are often different, as shown in fig. 3.

After the nth PHR of the UE is reported, the UE transmits the first SRS after T1 time, and transmits the second SRS after T2 time, …. During T1, T2, each term in the formula of SRS transmission power may be changed. More specifically, two types of variations are possible: one is that the path loss measured by the UE changes, i.e., the term "α (j) · PL" in the UE transmit power calculation formula may change (one possibility of the path loss change is due to the UE moving position during this time); and the other is that the base station may issue some new power control parameters and power control adjustment quantities to the UE during this period. For the former, the base station cannot know that the calculation error of the transmission power is caused, but the calculation error is extremely small and can be ignored, because the position moved by the UE in a short time (for example, 100ms) is very small unless the UE moves at a high speed.

For the latter, optionally, in this embodiment of the present invention, when the time when the target UE transmits the SRS is different from the time when the target UE transmits the PHR, the first transmission power for the target UE to transmit the SRS is: the target transmission power is calculated when the UE sends the SRS last time, and the transmission power change amount caused by the power control parameter change is the transmission power change amount caused by the power control parameter change during the period when the UE sends the SRS last time, which is recorded by the first base station, when the UE sends the PHR last time to the UE.

Since the parameters are transmitted by the base station itself, the transmission power variation caused by the parameter variation can be calculated and used to calculate the SRS transmission power, i.e. P_SRS＝P_{SRS per RE basis}The + PHR reports the transmission power change amount caused by the power control parameter change during SRS transmission. Although the SRS transmission power calculated by the method still has the power control parameter delta p which can not be known by the downlink PL and is issued in the periods of T1 and T2_kThe error of the error is demodulated at the UE side, however, the errors in both aspects are limited to the error introduced from the report of the nth PHR to the report of the (n + 1) th PHR, that is, when the report of the (n + 1) th PHR is reported, the newly calculated PSRS is accurate and error-free per RE reference, and the error is cleared. That is, reporting with PHR, although not completely eliminatedThe reporting period of the PHR is controllable by the base station, for example, the reporting period of the PHR can be set to 100 ms-1 s, the change of the position of the UE is small in such a short time, the change of the α (j). PL is small, the delivered delta p is small_kThe number is not too large, the demodulation errors of the UE are less, therefore, the two errors are small, and the error of the grid positioning of the UE is acceptable.

To summarize, P is calculated based on the last PHR report_{SRS per RE basis}UE maximum transmit power-PHR-10 logMpusch + P_{SRS_OFFSET}. Reporting power control parameters (including PSRS _ OFFSET, P) in SRS transmission period according to the latest PHR_{o_PUSCH}Parameters of TPC), expressed as Δ P, the final SRS transmit power per RE can be P per RE_SRS＝P_{SRS per RE basis}+ Δ P is calculated.

103. And the first base station calculates a first uplink path loss of the target UE for sending the SRS according to the first transmitting power and the first uplink RSRP.

After the first base station acquires the first transmission power and the first uplink RSRP of the SRS sent by the target UE, the first uplink loss of the SRS sent by the target UE can be calculated by using a formula "uplink loss is the transmission power of the UE — uplink received power RSRP".

104. And the adjacent base station calculates to obtain a second uplink path loss.

As already mentioned in the foregoing discussion, the first base station needs to construct a wireless grid, and not only the first base station needs to calculate the first uplink loss, but also other neighboring base stations need to calculate the second uplink loss. It should be noted that the neighboring base station herein is not only one neighboring base station, but may be a plurality of neighboring base stations, such as 4, 5, etc., in a plurality of neighboring cells of the cell served by the first base station. The more neighboring base stations, the more accurate the subsequently constructed radio grid is. The specific way of calculating the second uplink path loss by the adjacent base station is similar to the way of obtaining the first uplink RSRP and the first transmit power by the first base station in the previous step 101 to step 103, and calculating the first uplink path loss, which is not described herein again.

It should be noted that, this step 104 is not limited to be executed after the previous step 103 is executed, and since the neighboring base station assists in calculating the uplink loss, the neighboring base station performs measurement and calculation simultaneously with the first base station, so the step 104 can be placed in any one of the above three steps.

105. And the first base station receives a second uplink loss sent by the adjacent base station.

After assisting the first base station to calculate the second uplink loss, the adjacent base station sends the second uplink loss to the first base station, so that the first base station constructs a wireless grid through a plurality of uplink losses, and the target UE is positioned.

106. And the first base station constructs a wireless grid according to the first uplink loss and the second uplink loss.

Because the wireless signals have the characteristic of random fluctuation under the influence of the surrounding environment, actually, the RSRP obtained by measuring a certain position also has random fluctuation, and errors exist in the measurement, so that the RSRP cannot identify the position of the UE infinitely and accurately. Fortunately, RSRP has a high probability of fluctuating within a certain interval, and therefore, a set of RSRPs can identify the UE's location with an accuracy determined by the fluctuation range, which is sufficient for many applications of wireless networks. Since the uplink RSRP corresponds to the uplink loss, for example, processing with 3dB accuracy (according to actual test, the approximate fluctuation range of the uplink RSRP measured by the base station at a fixed point does not exceed 3dB), the UE location identifier with the effect shown in fig. 4 is obtained — the whole cell coverage area of the base station is divided into a piece of grid with 3dB side length, and the UE is located in one of the grids.

For ease of understanding, fig. 4 illustrates the locations identified by the path loss doublet of the first base station and the second base station of a neighbor cell: as if the service cell is divided into cells each 3dB on a side, the positioning accuracy is a cell-because these cells are divided by measuring the uplink loss with wireless signals, the dimension is dB, rather than a geographical grid divided by latitude and longitude or by length/distance dimension meters/cm, such a grid is called a wireless grid. In addition, there may be more than 2 neighboring base stations that assist the first base station in measuring the path loss, and a radio grid is the 3-tuple, 4-tuple … (determined by the number of cells involved in the measurement) of the measured path loss of each cell. The wireless grid finally contains the position information, and when the error range and the error probability meet the application requirements, the wireless grid can be used for identifying the position of the UE and recording the channel quality information of the position.

Referring to fig. 5, fig. 5 is a schematic diagram of a base station, which corresponds to the first base station in the embodiment of fig. 2, and includes:

an obtaining unit 201, configured to obtain a first uplink reference signal received power RSRP by measuring a sounding reference signal SRS sent by a target user equipment UE, where the target UE is a UE in a serving cell where a base station is located;

the obtaining unit 201 is further configured to obtain a first transmission power for the target UE to transmit the SRS;

a calculating unit 202, configured to calculate, according to the first transmit power and the first uplink RSRP, a first uplink path loss of the SRS sent by the target UE;

a receiving unit 203, configured to receive a second uplink path loss sent by an adjacent base station, where the second uplink path loss is obtained by the adjacent base station through calculation according to a second uplink RSRP and a second transmission power, the second uplink RSRP is obtained by the adjacent base station by measuring the SRS sent by the target UE, and the second transmission power is obtained by the adjacent base station by obtaining the transmission power obtained by the target UE by sending the SRS;

a constructing unit 204, configured to construct a wireless grid according to the first uplink loss and the second uplink loss.

Optionally, the obtaining unit 201 is specifically configured to:

calculating to obtain the Physical Uplink Shared Channel (PUSCH) use power of the PHR sent by the UE according to the received power consumption allowance PHR sent by the target UE;

and calculating to obtain target transmitting power according to the PUSCH use power, and taking the target transmitting power as first transmitting power for the target UE to transmit the SRS.

Optionally, the specific calculation formula for the obtaining unit to obtain 201 the first transmission power for the target UE to transmit the SRS includes:

P_SRS(i)＝P_{SRS_OFFSET}+10log₁₀(M_SRS)+P_{o_PUSCH}(j)+P_PUSCH(i)-(10log₁₀(M_PUSCH(i'))+P_{o_PUSCH}(j)+Δ_TF(i'))

wherein, P_SRS(i) Represents a first transmission power, P, of the target UE in subframe i to transmit the SRS_{SRS_OFFSET}A dedicated pre-set parameter, M, representing the target UE_SRSRepresents the transmission bandwidth, P, of the SRS at sub-frame i_{o_PUSCH}(j) A power control parameter, M, representing the PUSCH channel_PUSCH(i ') denotes the size of the resource allocated for PUSCH within subframe i', Δ_TF(i) Indicates the power adjustment amount determined by the modulation scheme selected for PUSCH transmission in the i' th subframe.

Optionally, when the time when the target UE transmits the SRS is different from the time when the target UE transmits the PHR, the first transmission power of the target UE for transmitting the SRS is:

the target transmission power is calculated when the UE sends the SRS last time, and the transmission power change amount caused by the power control parameter change is the transmission power change amount caused by the power control parameter change during the period when the UE sends the SRS last time, which is recorded by the first base station, when the UE sends the PHR last time to the UE.

Optionally, the base station further includes:

an allocating unit 205, configured to, before the obtaining unit obtains the first uplink reference signal received power RSRP by measuring a sounding reference signal SRS sent by a target user equipment UE, use all UEs in a cell served by a served cell and a cell served by an adjacent base station as UEs in the same virtual cell, so that the served cell and all UEs in the cell served by the adjacent base station share SRS resources at the same cell level, and allocate the target SRS resources to the target UE.

The detailed description of each unit in the embodiment of fig. 5 may refer to the detailed description of the method for constructing a wireless grid provided in the embodiment of fig. 2, and is not repeated herein.

Referring to fig. 6, fig. 6 is a schematic diagram of a base station, which corresponds to the neighboring base station in the embodiment of fig. 2, and includes:

an obtaining unit 301, configured to obtain a first uplink reference signal received power RSRP by measuring a sounding reference signal SRS sent by a target user equipment UE, where the target UE is a UE in a serving cell where a first base station is located;

the obtaining unit 301 is further configured to obtain a second transmission power of the SRS sent by the target UE;

a calculating unit 302, configured to calculate, according to the second transmit power and the second uplink RSRP, a second uplink path loss of the SRS sent by the target UE;

a sending unit 303, configured to send the second uplink loss to the first base station.

Optionally, the obtaining unit 301 is specifically configured to:

and calculating to obtain target transmitting power according to the PUSCH use power, and taking the target transmitting power as second transmitting power for the target UE to send the SRS.

Optionally, the specific calculation formula for the obtaining unit 301 to obtain the second transmission power for the target UE to send the SRS includes:

wherein i represents a subframe used by the target UE for transmitting the SRS, i' represents a subframe used by the target UE for transmitting the PHR, and P_SRS(i) Represents a first transmission power, P, of the target UE in subframe i to transmit the SRS_{SRS_OFFSET}A dedicated pre-set parameter, M, representing the target UE_SRSRepresents the transmission bandwidth, P, of the SRS at sub-frame i_{o_PUSCH}(j) Representing a power control parameter, P, of the PUSCH channel_PUSCH(i') denotes PUSCH used power, P_PUSCH(i') is the maximum transmit power of the target UE minus the PHR, M_PUSCH(i ') denotes the size of the resource allocated for PUSCH within subframe i', Δ_TF(i) Indicates the power adjustment amount determined by the modulation scheme selected for PUSCH transmission in the i' th subframe.

Optionally, when the time when the target UE sends the SRS is different from the time when the target UE sends the PHR, a second transmission power of the target UE for sending the SRS is:

the target transmission power is calculated when the UE sends the PHR last time before the SRS, and the transmission power change amount caused by the power control parameter change is the transmission power change amount caused by the power control parameter change during the period that the adjacent base station records the PHR sent by the UE last time and the SRS sent by the UE.

The detailed description of each unit in the embodiment of fig. 6 may refer to the detailed description of the method for constructing a wireless grid provided in the embodiment of fig. 2, which is not repeated herein.

The first base station according to the embodiment of fig. 5 has another form of embodiment, which is shown in fig. 7, and includes: a processor 401, a memory 402, a transceiver 403, said processor 401, said memory 402 and said transceiver 403 being connected by a bus 404, the transceiver 403 may comprise a transmitter and a receiver, said memory 402 stores computer instructions, said processor is adapted to implement the functions of the steps performed by the first base station in the method of constructing a radio grid in the embodiment of fig. 1 by executing said computer instructions. Various flexible design modes can be adopted for specific implementation, and the corresponding functions of each device can be further referred to the embodiment of the method, which is not limited by the invention.

Still another form of embodiment of the neighboring base station in the embodiment of fig. 6 is shown in fig. 8, and includes: a processor 501, a memory 502, a transceiver 503, said processor 501, said memory 502 and said transceiver 503 being connected by a bus 504, the transceiver 503 may comprise a transmitter and a receiver, said memory 502 stores computer instructions, said processor is used for implementing the functions of the steps performed by the neighbouring base stations in the method of constructing a radio grid in the embodiment of fig. 1 by executing said computer instructions. Various flexible design modes can be adopted for specific implementation, and the corresponding functions of each device can be further referred to the embodiment of the method, which is not limited by the invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method of constructing a wireless grid, the method comprising:

a first base station acquires first uplink Reference Signal Received Power (RSRP) by measuring a Sounding Reference Signal (SRS) sent by target User Equipment (UE), wherein the target UE is the UE in a serving cell where the first base station is located;

the first base station acquires first transmission power of the target UE for transmitting the SRS;

the first base station calculates a first uplink path loss of the target UE for sending the SRS according to the first transmitting power and the first uplink RSRP;

the first base station receives a second uplink path loss sent by an adjacent base station, wherein the second uplink path loss is obtained by the adjacent base station through calculation according to a second uplink RSRP and a second transmission power, the second uplink RSRP is obtained by the adjacent base station measuring the SRS sent by the target UE, and the second transmission power is obtained by the adjacent base station obtaining the transmission power obtained by the target UE sending the SRS;

the first base station constructs a wireless grid according to the first uplink loss and the second uplink loss;

the first base station takes all the UE in the cell served by the first base station and the cell served by the adjacent base station as the UE in the same virtual cell, so that the cell served by the first base station and all the UE in the cell served by the adjacent base station share the SRS resource of the same cell level, and the target SRS resource is allocated to the target UE.

2. The method of claim 1, wherein the obtaining, by the first base station, a first transmission power for the target UE to transmit the SRS comprises:

the first base station calculates and obtains the Physical Uplink Shared Channel (PUSCH) use power of the PHR sent by the UE according to the received power consumption allowance PHR sent by the target UE;

and the first base station calculates a target transmission power according to the PUSCH use power, and uses the target transmission power as a first transmission power for the target UE to transmit the SRS.

3. The method of claim 2, wherein a specific calculation formula for calculating, by the first base station, a target transmission power according to the PUSCH utilization power and using the target transmission power as the first transmission power for the target UE to transmit the SRS comprises:

wherein i represents a subframe used by the target UE for transmitting the SRS, i' represents a subframe used by the target UE for transmitting the PHR, and P_SRS(i) Represents a first transmission power, P, of the target UE in subframe i to transmit the SRS_{SRS_OFFSET}A dedicated pre-set parameter, M, representing the target UE_SRSRepresents the transmission bandwidth, P, of the SRS at sub-frame i_{o_PUSCH}(j) Representing a power control parameter, P, of the PUSCH channel_PUSCH(i') represents the PUSCH used power, P_PUSCH(i') is the maximum transmit power of the target UE minus the PHR, M_PUSCH(i ') denotes the size of the resource allocated for PUSCH within subframe i', Δ_TF(i) Indicates the power adjustment amount determined by the modulation scheme selected for PUSCH transmission in the i' th subframe.

4. The method of claim 3, wherein when the target UE transmits the SRS at a different time than the PHR at the same time, a first transmit power at which the target UE transmits the SRS is:

5. A method of constructing a wireless grid, the method comprising:

an adjacent base station acquires a second uplink Reference Signal Received Power (RSRP) through measuring a Sounding Reference Signal (SRS) sent by target User Equipment (UE), wherein the target UE is the UE in a serving cell where the first base station is located;

the adjacent base station acquires second transmitting power of the target UE for sending the SRS;

the adjacent base station calculates a second uplink path loss of the target UE for sending the SRS according to the second transmitting power and the second uplink RSRP;

the adjacent base station sends the second uplink loss to the first base station;

6. The method of claim 5, wherein the obtaining, by the neighboring base station, a second transmission power for the target UE to transmit the SRS comprises:

the adjacent base station calculates to obtain the Physical Uplink Shared Channel (PUSCH) use power of the PHR sent by the UE according to the received power consumption margin PHR sent by the target UE;

and the adjacent base station calculates a target transmitting power according to the PUSCH using power, and uses the target transmitting power as a second transmitting power for the target UE to transmit the SRS.

7. The method of claim 6, wherein a specific calculation formula for calculating the target transmission power by the neighboring base station according to the PUSCH utilization power and using the target transmission power as the second transmission power for the target UE to transmit the SRS comprises:

8. The method of claim 7, wherein when the SRS is transmitted by the target UE at a different time than the PHR is transmitted by the target UE, a second transmission power for the SRS transmitted by the target UE is:

9. A first base station, the first base station comprising:

the obtaining unit is further configured to obtain a first transmission power for the target UE to transmit the SRS;

a calculating unit, configured to calculate, according to the first transmit power and the first uplink RSRP, a first uplink path loss of the SRS sent by the target UE;

a receiving unit, configured to receive a second uplink loss sent by an adjacent base station, where the second uplink loss is obtained by the adjacent base station through calculation according to a second uplink RSRP and a second transmission power, the second uplink RSRP is obtained by the adjacent base station by measuring the SRS sent by the target UE, and the second transmission power is obtained by the adjacent base station by obtaining the transmission power obtained by the target UE by sending the SRS;

a constructing unit, configured to construct a wireless grid according to the first uplink loss and the second uplink loss;

the first base station further comprises:

and the allocation unit is used for taking all the UEs in the cells served by the served cell and the adjacent base station as the UEs in the same virtual cell, so that the served cell and all the UEs in the cells served by the adjacent base station share the SRS resource of the same cell level, and allocating the target SRS resource for the target UE.

10. The first base station of claim 9, wherein the obtaining unit is specifically configured to:

11. The first base station of claim 10, wherein the specific calculation formula for the obtaining unit to obtain the first transmission power for the target UE to transmit the SRS comprises:

12. The first base station of claim 11, wherein when the target UE transmits the SRS at a different time than the PHR transmitted by the target UE, a first transmit power at which the target UE transmits the SRS is:

13. A base station, characterized in that the base station comprises:

an obtaining unit, configured to obtain, by measuring a sounding reference signal SRS sent by a target user equipment UE, a second uplink reference signal received power RSRP, where the target UE is a UE in a serving cell where a first base station adjacent to the base station is located;

a calculating unit, configured to calculate, according to the second transmit power and the second uplink RSRP, a second uplink path loss of the SRS sent by the target UE;

a sending unit, configured to send the second uplink loss to the first base station;

the first base station takes all the UEs in the cell served by the first base station and the cells served by the adjacent base stations as the UEs in the same virtual cell, so that the cell served by the first base station and all the UEs in the cells served by the adjacent base stations share the SRS resource of the same cell level, and the target SRS resource is allocated to the target UE.

14. The base station of claim 13, wherein the obtaining unit is specifically configured to:

15. The base station of claim 14, wherein the specific calculation formula for the obtaining unit to obtain the second transmission power for the target UE to transmit the SRS comprises:

16. The base station of claim 15, wherein when the SRS is transmitted by the target UE at a different time from the PHR transmitted by the target UE, the second transmission power for the SRS transmitted by the target UE is:

17. A base station, characterized in that the base station comprises: a processor, a memory, a transceiver, the processor, the memory and the transceiver being connected by a bus, the memory storing computer instructions, the processor being configured to implement the method of constructing a wireless grid of any of claims 1 to 4 by executing the computer instructions.

18. A base station, characterized in that the base station comprises: a processor, a memory, a transceiver, the processor, the memory and the transceiver being connected by a bus, the memory storing computer instructions, the processor implementing the method of constructing a wireless grid as claimed in any one of claims 5 to 8 by executing the computer instructions.