CN111565445B

CN111565445B - Method and equipment for base station to carry out resource scheduling and power control on terminal

Info

Publication number: CN111565445B
Application number: CN201910117047.9A
Authority: CN
Inventors: 刘敏
Original assignee: Hisense Co Ltd
Current assignee: Hisense Co Ltd
Priority date: 2019-02-13
Filing date: 2019-02-13
Publication date: 2021-06-04
Anticipated expiration: 2039-02-13
Also published as: CN111565445A

Abstract

The invention discloses a method and equipment for a base station to carry out resource scheduling and power control on a terminal, which relate to the technical field of wireless communication and are used for solving the problems that the existing resource scheduling method does not consider the influence of remote interference and has poor effect of reducing the remote interference when the remote interference exists between the base stations in the existing TDD network, and the method comprises the following steps: the method comprises the steps that an interfered base station measures RI intensity of uplink OFDM symbols, wherein the interfered base station is a base station when IoT presents RI characteristics and/or the IoT of at least one OFDM symbol is larger than a threshold value; after receiving the transmission request sent by the terminal, the interfered base station allocates the uplink OFDM symbol for the terminal according to the RI strength of the uplink OFDM symbol.

Description

Method and equipment for base station to carry out resource scheduling and power control on terminal

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and a device for a base station to perform resource scheduling and power control on a terminal.

Background

Under certain weather conditions, electromagnetic waves in high altitude locations, particularly in the troposphere, are subject to atmospheric refraction and their propagation trajectory will bend to the ground. In which a part of the electromagnetic wave will be trapped in a thin atmospheric layer of a certain thickness, and will propagate like an electromagnetic wave in a metal waveguide, which is called an atmospheric waveguide phenomenon, as shown in fig. 1.

In a semi-statically configured TDD (Time Division duplex) network, when there is an atmospheric waveguide phenomenon, a DL (downlink) transmission of a Remote gNB (5G base station) as an aggregator propagates a long distance, which may be up to 300km at most, and when a propagation delay is longer than a Guard Period (GP) between an uplink and a downlink of a victim, the DL transmission causes Interference to an UL (uplink) transmission of the local gNB, which is RI (Remote Interference). The RIs of a plurality of different distances gbb will be accumulated at the interfered side, resulting in that the ratio of Interference (including Thermal noise) to Thermal noise (IoT) of the interfered side gbb exhibits an RI characteristic, and it is observed that the RI Interference ranges from-105 dBm (decibel milliwatt) to-90 dBm, and in order to ensure the performance of the user at the interfered side, measures need to be taken to eliminate the influence of the RI.

Currently, resource scheduling for uplink transmission of a UE (User Equipment) is at a subframe level, that is, a subframe configured by a User and capable of performing uplink transmission is a subframe, as shown in fig. 2, where U denotes a subframe for uplink transmission, D denotes a subframe for downlink transmission, and S denotes a special subframe. The 3GPP (3rd Generation Partnership Project) protocol states that RIM (Remote Interference Management) can be performed by time, frequency and power domain methods when Remote Interference is present. Specifically, when the RI strength is high, the interfering gNB and the interfered gNB may be made to use orthogonal time-domain and frequency-domain resources to cancel the RI, and conversely, when the RI strength is low, it may be considered to reduce the RI by using power control, and specifically, the DL transmit power of the interfering gNB may be reduced or the UL transmit power of the interfered gNB may be increased.

In summary, in the current TDD network, the existing resource scheduling method does not consider the influence of remote interference, and the effect of reducing the remote interference is poor when the remote interference exists between base stations.

Disclosure of Invention

The invention provides a base station for scheduling resources of a terminal, which is used for solving the problems that the existing resource scheduling method does not consider the influence of remote interference in the existing TDD network in the prior art, and the effect of reducing the remote interference is poor when the remote interference exists between the base stations.

In a first aspect, a method for a base station to schedule resources for a terminal provided in an embodiment of the present invention includes:

measuring an RI strength of an uplink OFDM (Orthogonal Frequency Division Multiplexing) symbol by an interfered base station, wherein the interfered base station is a base station when an IoT presents an RI characteristic and/or the IoT of at least one OFDM symbol is larger than a threshold value;

and after receiving a transmission request sent by a terminal, the interfered base station allocates the uplink OFDM symbol for the terminal according to the RI intensity of the uplink OFDM symbol.

According to the method, when the base station detects that the IoT presents the RI characteristic and/or the IoT of at least one OFDM symbol is larger than the threshold value, the base station can be confirmed to be the interfered base station at the moment, the RI intensity of the uplink OFDM symbol in the OFDM symbols is measured, the remote interference condition of each OFDM symbol is determined through measurement, the uplink OFDM symbol is distributed to the terminal according to the RI intensity of the uplink OFDM symbol, symbol-level resource scheduling is achieved, the terminal conducts data transmission on the distributed OFDM symbol, compared with the existing subframe-level resource scheduling, the method considers the influence of the remote interference on the OFDM symbol when conducting resource scheduling on a user, and the effect is better when reducing the RI influence.

In a possible implementation manner, the measuring, by the interfered base station, the RI strength of the uplink OFDM symbol includes:

the interfered base station takes the difference value of the interference intensity and the non-RI intensity of the uplink OFDM symbol as the RI intensity of the uplink OFDM symbol;

the non-RI strength is an average value of the sum of interference and thermal noise power of the uplink OFDM symbol in M continuous sub-frames before the interfered base station is subjected to RI, the interference strength is an average value of the sum of interference and thermal noise power of the uplink OFDM symbol in N continuous sub-frames after the interfered base station is subjected to RI, and M and N are positive integers.

In the method, for any uplink OFDM symbol in any subframe, the power sum of interference and thermal noise corresponding to the OFDM symbol in M consecutive subframes of an uplink OFDM symbol before a base station subject to remote interference is determined through basic interference measurement (interference at this time is non-RI interference), the average value of the power sum of interference and thermal noise of the M OFDM symbols is used as the non-RI intensity of the uplink OFDM symbol, the power sum of interference and thermal noise corresponding to the OFDM symbol in N consecutive subframes of the uplink OFDM symbol after the base station subject to remote interference is determined through measurement (interference at this time is RI interference and non-RI interference), the average value of the power sum of the N interference and thermal noise is used as the interference intensity of the uplink OFDM symbol, when the RI intensity of a certain uplink OFDM symbol is determined, the difference value between the interference intensity of the uplink OFDM symbol and the non-RI intensity is used as the intensity of the uplink OFDM symbol, for any OFDM symbol, the interference strength and the non-RI strength of the uplink OFDM symbol before and after the interfered base station receives RI can be more accurately determined according to the power of the interference and the thermal noise of the symbol in a plurality of continuous subframes and the averaging method, and further the RI strength of any OFDM symbol can be accurately obtained.

In a possible implementation manner, the interfered base station receives a transmission request sent by a terminal;

after receiving a transmission request sent by a terminal, the interfered base station allocates the uplink OFDM symbol to the terminal according to the RI intensity of the uplink OFDM symbol, and the method comprises the following steps:

the interfered base station determines the number of OFDM symbols required by the terminal according to the transmission request sent by the terminal;

and the interfered base station distributes uplink OFDM symbols of the number of the OFDM symbols required by the terminal to the terminal according to the sequence from strong to weak of the RI intensity of the uplink OFDM symbols.

In the method, if the base station receives the transmission request of only one terminal, the uplink OFDM symbols with strong RI strength are allocated to the terminal according to the RI strength of the uplink OFDM symbols in the current subframe, and the first uplink OFDM symbols with strong RI strength are allocated to the terminal according to the number of the symbols occupied by the transmission request of the terminal when the OFDM symbols are allocated to the terminal, so that symbol-level user scheduling is realized.

In a possible implementation manner, the interfered base station receives transmission requests sent by a plurality of terminals;

the interfered base station determines a TA (Timing Advance) value corresponding to the terminal and the number of OFDM symbols required by the terminal according to a transmission request sent by the terminal;

the interfered base station distributes uplink OFDM symbols of the number of the OFDM symbols required by the terminal to the terminal according to the TA value corresponding to the terminal and the RI intensity of the uplink OFDM symbols; and the RI intensity of the uplink OFDM symbol allocated by the terminal with the small TA value is strong.

According to the method, if a base station receives transmission requests of a plurality of terminals, the distance between the terminal and an interfered base station can be determined according to the TA value corresponding to each terminal, the distance from the interfered base station jumps, and the TA value is smaller, so that the TA value of a cell center user is small, an OFDM symbol with strong remote interference is distributed for the terminal with the small TA value, meanwhile, the terminal is distributed according to the symbol length occupied by the terminal transmission request, the scheduling of symbol-level users is realized, the OFDM symbol with strong remote interference is distributed to the cell center user right, the center user is far away from the cell boundary, the attenuation is large, and the leakage interference between cells is small.

In a possible implementation manner, if the number of uplink OFDM symbols allocated to the terminal by the interfered base station is smaller than the number of OFDM symbols required by the terminal, the uplink OFDM symbols are reallocated to the terminal in the next subframe.

In the method, when a number of terminals sending transmission requests is large, the uplink OFDM symbols in the current subframe are not sufficiently allocated to the terminals, and for the terminals, if the number of symbols allocated to the terminals is smaller than the number of OFDM symbols required by the terminals, the uplink OFDM symbols are not allocated to the terminals in the current subframe, but are reallocated to the terminals in the next subframe, so that the terminals can accurately perform uplink data transmission.

In a possible implementation manner, after the interfered base station receives a transmission request sent by a terminal, and allocates the uplink OFDM symbol to the terminal according to the RI strength of the uplink OFDM symbol, the method further includes:

and the interfered base station controls the transmitting power of each uplink OFDM symbol of the terminal according to the RI intensity of the uplink OFDM symbol distributed to the terminal.

Compared with the prior art, the method expands the transmitting power of the terminal to the symbol level, and reduces the influence of remote interference by controlling the transmitting power of the symbol subjected to the remote interference after the symbol-level resource scheduling is carried out on the terminal.

In a possible implementation manner, the controlling, by the interfered base station, the transmit power of each uplink OFDM symbol of the terminal according to the RI strength of the uplink OFDM symbol allocated to the terminal includes:

the interfered base station determines the specific nominal power of the uplink OFDM symbol according to the RI intensity of the uplink OFDM symbol;

and the interfered base station sends the specific nominal power of the uplink OFDM symbol to the terminal so that the terminal updates an open-loop power control item in the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

According to the method, the RI intensity of each OFDM symbol is different, so that the specific nominal power of each OFDM symbol can be determined according to the RI intensity, after the interfered base station sends the specific nominal power of the uplink OFDM symbol to the terminal, the terminal updates the open-loop power control item in the transmitting power of the uplink OFDM symbol according to the received specific nominal power of the OFDM symbol, and the influence of remote interference is reduced.

In a possible implementation manner, the determining, by the interfered base station, the specific nominal power of the uplink OFDM symbol according to the RI strength of the uplink OFDM symbol includes:

the interfered base station determines power P according to the RI intensity of the uplink OFDM symbol and determines the specific nominal power of the uplink OFDM symbol according to the power P;

wherein the power P is a power at which the SINR of the interfered base station after being subjected to the RI matches the SINR of the interfered base station before being subjected to the RI.

In the method, the specific nominal power of the uplink OFDM symbol can be determined according to the RI strength of the OFDM symbol, the SINR re-determined according to the RI strength of each OFDM symbol after the interference is detected by the interfering base station is different from the SINR when RI is not detected before, because the interference after the interference by the RI is increased, the SINR after the interference by the RI is decreased, the power P is determined to be constant (P is a linear value of the specific nominal power), and then the specific nominal power of each OFDM symbol is determined according to P, at this time, the specific nominal power of the determined OFDM symbol is increased compared with the power when RI is not detected before, and the influence of remote interference is reduced by increasing the transmission power of the uplink OFDM symbol.

In a second aspect, an apparatus for scheduling resources for a terminal by a base station according to an embodiment of the present invention includes: at least one processing unit and at least one memory unit, wherein the memory unit stores program code that, when executed by the processing unit, causes the apparatus to perform the following:

measuring the RI intensity of the uplink OFDM symbol;

and after receiving a transmission request sent by a terminal, allocating the uplink OFDM symbols to the terminal according to the RI intensity of the uplink OFDM symbols.

In a possible implementation manner, the processing unit is specifically configured to:

taking the difference value between the interference intensity and the non-RI intensity of the uplink OFDM symbol as the RI intensity of the uplink OFDM symbol;

the non-RI strength is an average value of the sum of interference and thermal noise power of the uplink OFDM symbol in M continuous sub-frames before an interfered base station receives RI, the interference strength is an average value of the sum of interference and thermal noise power of the uplink OFDM symbol in N continuous sub-frames after the interfered base station receives RI, and M and N are positive integers; the interfered base station is a base station when the IoT exhibits the RI characteristic and/or the IoT of at least one OFDM symbol is greater than a threshold value.

In a possible implementation, a transmission request sent by a terminal is received;

the processing unit is specifically configured to:

determining the number of OFDM symbols required by the terminal according to a transmission request sent by the terminal;

and allocating the uplink OFDM symbols of the number of the OFDM symbols required by the terminal to the terminal according to the sequence from strong to weak of the RI intensity of the uplink OFDM symbols.

In one possible implementation manner, transmission requests sent by a plurality of terminals are received;

the processing unit is specifically configured to:

determining a TA value corresponding to the terminal and the number of OFDM symbols required by the terminal according to a transmission request sent by the terminal;

allocating uplink OFDM symbols of the number of OFDM symbols required by the terminal to the terminal according to the TA value corresponding to the terminal and the RI intensity of the uplink OFDM symbols; and the RI intensity of the uplink OFDM symbol allocated by the terminal with the small TA value is strong.

In one possible implementation, the processing unit is further configured to:

and if the number of the uplink OFDM symbols allocated to the terminal is less than the number of the OFDM symbols required by the terminal, reallocating the uplink OFDM symbols to the terminal in the next subframe.

In one possible implementation, the processing unit is further configured to:

and controlling the transmitting power of each uplink OFDM symbol of the terminal according to the RI intensity of the uplink OFDM symbol allocated to the terminal.

determining the specific nominal power of the uplink OFDM symbol according to the RI intensity of the uplink OFDM symbol;

and sending the specific nominal power of the uplink OFDM symbol to the terminal so that the terminal updates an open-loop power control item in the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

determining power P according to the RI intensity of the uplink OFDM symbol, and determining specific nominal power of the uplink OFDM symbol according to the power P;

In a third aspect, an apparatus for scheduling resources for a terminal by a base station according to an embodiment of the present invention includes: measurement module and processing module:

the measurement module is used for measuring the RI intensity of the uplink OFDM symbol;

and the processing module is used for distributing the uplink OFDM symbols for the terminal according to the RI intensity of the uplink OFDM symbols after receiving the transmission request sent by the terminal.

In a possible implementation manner, the measurement module is specifically configured to:

the processing module is specifically configured to:

In one possible implementation, the processing module is further configured to:

In a possible implementation manner, the processing module is specifically configured to:

In a fourth aspect, a method for a base station to perform power control on a terminal provided in an embodiment of the present invention includes:

determining a specific nominal power of an uplink OFDM symbol according to the RI strength of the uplink OFDM symbol allocated to a terminal by an interfered base station, wherein the interfered base station is a base station when the IoT presents the RI characteristic and/or the IoT of at least one OFDM symbol is larger than a threshold value;

and the interfered base station sends the specific nominal power of the uplink OFDM symbol to the terminal so that the terminal determines the transmitting power of the uplink OFDM symbol according to the specific nominal power.

According to the method, the interfered base station re-determines the specific nominal power corresponding to each OFDM symbol according to the RI intensity of the uplink OFDM symbol allocated to the terminal, and the interfered base station sends the determined specific nominal power of each OFDM symbol to the terminal, so that the terminal regulates and controls the transmitting power of each OFDM symbol according to the received specific nominal power of each OFDM symbol, the power regulation at a symbol level is realized, and the influence of remote interference is reduced.

In a possible implementation manner, the determining, by the interfered base station, the specific nominal power of the uplink OFDM symbol according to the uplink OFDM symbol allocated to the terminal includes:

According to the method, the interfered base station can determine the specific nominal power of the uplink OFDM symbol according to the RI intensity of the OFDM symbol, the SINR re-determined according to the RI intensity of each OFDM symbol after the interfered base station detects the RI interference is different from the SINR when the RI is not detected before, because the interference after the RI interference is increased, the SINR after the RI interference is reduced, the SINR is ensured to be unchanged, the determined power P (P is a linear value of the specific nominal power) is ensured, the specific nominal power of each OFDM symbol is determined according to the P, the specific nominal power of the determined OFDM symbol is increased compared with the power when the RI is not received before, and the influence of remote interference is reduced by improving the transmitting power of the uplink OFDM symbol.

In a fifth aspect, a method for a base station to perform power control on a terminal provided in an embodiment of the present invention includes:

a terminal receives a specific nominal power of an uplink OFDM symbol distributed to the terminal by an interfered base station sent by the interfered base station, wherein the specific nominal power is determined by the interfered base station according to the RI strength of the uplink OFDM symbol, and the interfered base station is a base station when the IoT presents the RI characteristic and/or the IoT of at least one OFDM symbol is larger than a threshold value;

and the terminal determines the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

In the method, the terminal re-regulates the transmitting power of each OFDM symbol by receiving the specific nominal power of each uplink OFDM symbol determined by the interfered base station according to the RI intensity of each uplink OFDM symbol, thereby realizing power regulation at a symbol level and reducing the influence of remote interference.

In a sixth aspect, an apparatus for scheduling resources for a terminal by a base station according to an embodiment of the present invention includes: at least one processing unit and at least one memory unit, wherein the memory unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:

determining the specific nominal power of an uplink OFDM symbol according to the RI intensity of the uplink OFDM symbol distributed to a terminal;

and sending the specific nominal power of the uplink OFDM symbol to the terminal so that the terminal determines the transmitting power of the uplink OFDM symbol according to the specific nominal power.

wherein the power P is a power when the SINR of the interfered base station after being subjected to the RI is consistent with the SINR before being subjected to the RI, and the interfered base station is a base station when the IoT exhibits the RI characteristic and/or the IoT of at least one OFDM symbol is larger than a threshold value.

In a seventh aspect, an apparatus for performing power control on a terminal by a base station according to an embodiment of the present invention includes: at least one processing unit and at least one memory unit, wherein the memory unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:

receiving a specific nominal power of an uplink OFDM symbol allocated to the terminal by an interfered base station, wherein the specific nominal power is determined by the interfered base station according to the RI strength of the uplink OFDM symbol, and the interfered base station is a base station when the IoT presents the RI characteristic and/or the IoT of at least one OFDM symbol is larger than a threshold value;

and determining the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

In an eighth aspect, an embodiment of the present invention further provides an apparatus for performing power control on a terminal by a base station, where the apparatus includes:

a determining module, configured to determine a specific nominal power of an uplink OFDM symbol according to an RI strength of the uplink OFDM symbol allocated to a terminal;

a sending module, configured to send the specific nominal power of the uplink OFDM symbol to the terminal, so that the terminal determines the transmit power of the uplink OFDM symbol according to the specific nominal power.

In a possible implementation manner, the determining module is specifically configured to:

In a ninth aspect, an embodiment of the present invention further provides an apparatus for performing power control on a terminal by a base station, where the apparatus includes:

a receiving module, configured to receive a specific nominal power of an uplink OFDM symbol allocated to the terminal by an interfered base station, where the specific nominal power is determined by the interfered base station according to an RI strength of the uplink OFDM symbol, and the interfered base station is a base station where IoT exhibits an RI characteristic and/or IoT of at least one OFDM symbol is greater than a threshold;

a determining module, configured to determine the transmit power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

In a tenth aspect, the present application further provides a computer storage medium having a computer program stored thereon, which when executed by a processing unit, performs the steps of the method of the first aspect.

In addition, for technical effects brought by any one implementation manner of the second aspect to the third aspect and the sixth aspect to the ninth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect, the fourth aspect and the fifth aspect, and details are not described here.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic diagram of an atmospheric waveguide phenomenon according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a TDD radio frame structure according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a TDD radio frame, a subframe, a time slot, and an OFDM symbol relationship according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a method for scheduling resources to a terminal by a base station according to an embodiment of the present invention;

fig. 5A is a schematic diagram of remote interference between base stations according to an embodiment of the present invention;

fig. 5B is a schematic diagram of an IoT that causes an interfered gNB to exhibit an RI characteristic according to an embodiment of the present invention;

fig. 5C is a schematic diagram of the interfered enb suffering from RI in different subframes according to an embodiment of the present invention;

fig. 6A is a schematic diagram of RI interference measurement according to an embodiment of the present invention;

fig. 6B is a schematic diagram of an RI interference measurement result according to an embodiment of the present invention;

fig. 7 is a simulation diagram of an RI condition suffered by an OFDM symbol according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a UE geographical location relationship according to an embodiment of the present invention;

fig. 9 is a schematic diagram of OFDM symbol allocation according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a parameter K2 allocated to an OFDM symbol according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a change in leakage interference before and after user scheduling according to an embodiment of the present invention;

fig. 12A is a schematic diagram illustrating bit error rate simulation of UEs when power control is not performed again on the UEs according to an embodiment of the present invention;

fig. 12B is a schematic diagram illustrating bit error rate simulation of each UE after performing power control again on OFDM symbols of the UE according to an embodiment of the present invention;

fig. 12C is a schematic diagram illustrating bit error rate simulation of UEs with fixed UE transmission power and different errors in RI detection on OFDM symbols according to an embodiment of the present invention;

fig. 13 is a flowchart of a complete method for scheduling resources to a terminal by a base station according to an embodiment of the present invention;

fig. 14 is a schematic diagram of a device for scheduling resources for a terminal by a base station according to a first embodiment of the present invention;

fig. 15 is a schematic diagram of a device for scheduling resources to a terminal by a second base station according to an embodiment of the present invention;

fig. 16 is a schematic diagram of a system for controlling power of a terminal by a base station according to an embodiment of the present invention;

fig. 17 is a flowchart of a complete method for controlling power of a terminal by a base station according to an embodiment of the present invention;

fig. 18 is a schematic diagram of a method for controlling power of a terminal by a base station according to an embodiment of the present invention;

fig. 19 is a flowchart of a complete method for controlling power of a terminal by a base station according to an embodiment of the present invention;

fig. 20 is a schematic diagram of an interfered base station for performing power control on a terminal by a first base station according to an embodiment of the present invention;

fig. 21 is a schematic diagram of an interfered base station for performing power control on a terminal by a second base station according to an embodiment of the present invention;

fig. 22 is a schematic diagram of a terminal for performing power control on the terminal by a first base station according to an embodiment of the present invention;

fig. 23 is a schematic diagram of a terminal in which a second base station performs power control on the terminal according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Some of the words that appear in the text are explained below:

1. the term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

2. The term "terminal" in the embodiments of the present invention refers to a mobile communication device, such as a mobile phone, a tablet, a computer, etc.

3. In the embodiment of the present invention, the term "interfered base station" refers to a gNB whose uplink transmission is interfered when a remote interference phenomenon exists.

4. In the embodiment of the present invention, the term "Uplink OFDM symbol" may be used for an OFDM symbol transmitted by a PUSCH (Physical Uplink shared Channel), and does not include an OFDM symbol used for Demodulation of PUSCH data, that is, does not include an OFDM symbol occupied by a DMRS (Demodulation Reference Signal). DMRS is transmitted on resources of data or control information transmitted by a user. On a shared channel PUSCH, the DMRS occupies 1 OFDM symbol in each slot and is used for demodulating the shared channel PUSCH data.

The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.

For the requirement of uplink and downlink Time conversion in the TDD mode, TD-LTE (Time Division Long Term evolution) adopts a radio frame structure, where the length of the radio frame is 10ms and is composed of two half-frames with a length of 5ms, and each half-frame is composed of 5 subframes (subframes) with a length of 1ms, where there are 4 common subframes and 1 special subframe. The whole frame can also be understood as being divided into 10 subframes with length of 1ms as a unit of data scheduling and Transmission (i.e., TTI (Transmission time interval)). The subframes #1 and #6 may be configured as special subframes, the remaining subframes are used for Uplink transmission or Downlink transmission, one Uplink or Downlink transmission subframe includes 2 slots and 14 OFDM symbols, and one special subframe includes 3 special slots, that is, DwPTS (Downlink pilot time slot), GP (Guard space, Guard interval), and UpPTS (Uplink pilot time slot ), as shown in fig. 3, where the length of DwPTS may be configured as 3 to 12 OFDM symbols, and is used for transmission of a normal Downlink control channel and a Downlink shared channel; the length of the UpPTS can be configured into 1-2 OFDM symbols, and the UpPTS can be used for bearing an uplink physical random access channel and a Sounding pilot signal; the rest GP is used for a protection interval between uplink and downlink, the corresponding time length is about 71-714 mu s, and the corresponding cell radius is 7-100 km. Other subframes are divided into two time slots, and one subframe can be configured with 0-13 OFDM symbols.

At present, resource scheduling for uplink transmission of a user is performed at a subframe level, and in a semi-statically configured TDD (Time Division duplex) network, when an RI exists, RIs at a plurality of different distances gbb are accumulated at an interfered side, so that a ratio of interference (including thermal noise) to thermal noise of the interfered side gbb presents an RI characteristic.

In the current TDD network, the base station does not consider the influence of remote interference when scheduling resources for a user, so embodiments of the present invention provide a method and an apparatus for scheduling resources for a terminal by the base station, and a method and an apparatus for controlling power of a terminal by the base station. On the first hand, when the base station schedules the resource of the terminal, the uplink OFDM symbol is scheduled for the terminal through the resource scheduling of the symbol level, and the effect of reducing RI influence is better because the influence of remote interference is considered when the OFDM symbol is allocated to the terminal; in the second aspect, when the base station performs power control on the terminal, the influence of remote interference is reduced by increasing the transmission power of the uplink OFDM symbol, and it is ensured that the leaked ICI (Inter Cell interference) is small.

With respect to the above scenario, the following describes an embodiment of the present invention in further detail with reference to the drawings of the specification.

As shown in fig. 4, a method for a base station to perform resource scheduling on a terminal according to an embodiment of the present invention specifically includes the following steps:

step 400, an interfered base station measures the RI strength of an uplink OFDM symbol, wherein the interfered base station is a base station when the IoT exhibits the RI characteristic and/or the IoT of at least one OFDM symbol is greater than a threshold;

step 401, after receiving a transmission request sent by a terminal, the interfered base station allocates the uplink OFDM symbol to the terminal according to the RI strength of the uplink OFDM symbol.

Through the scheme, the OFDM symbols for uplink transmission are distributed for the terminal in one subframe, and the resource scheduling of the symbol level is realized.

In the embodiment of the present invention, the manner for determining whether the base station is an interfered base station includes, but is not limited to, part or all of the following:

the IoT of the base station exhibits RI characteristics;

the IoT of the at least one OFDM symbol is greater than a threshold.

Judging the way I, the IoT of the base station presents RI characteristics.

As shown in fig. 5B, when it is detected that the IoT of the base station exhibits the RI characteristic, that is, the OFDM symbol closer to the guard interval in the subframe K is subjected to larger remote interference, the IoT of the OFDM symbol exhibits a staircase shape, and the IoT of the base station exhibits the RI characteristic at this time, it may be determined that the base station is an interfered base station.

And in the second judgment mode, the IoT of at least one OFDM symbol is greater than a threshold value.

The IoT of noise (including RI interference, non-RI interference, thermal noise) in each OFDM symbol is measured by the base station, one subframe contains 14 OFDM symbols, and if the IoT of one OFDM symbol in subframe K is detected to exceed the threshold of-90 dBm, it can be determined that the OFDM symbol is subjected to remote interference, and it can also be determined that the base station itself is subjected to remote interference.

And a third judgment mode is that the IoT of at least one OFDM symbol is larger than the threshold value and the IoT of the base station presents an RI characteristic.

Generally, it is determined whether the base station is an interfered base station through a threshold and the RI characteristic, for example, when it is detected that the IoT with 5 OFDM symbols in the subframe K is greater than the threshold and the IoT of the base station exhibits the RI characteristic, it is determined that the base station itself is remotely interfered and is the interfered base station.

The uplink OFDM symbol in the embodiment of the present invention refers to an OFDM symbol that can be used for PUSCH data transmission, on a shared channel PUSCH, two symbols in one subframe are generally used for demodulation of shared channel PUSCH data (the 4 th and 11 th OFDM symbols of the subframe used for uplink transmission), and are not used for transmission of uplink data, and generally, except for the 4 th and 11 th OFDM symbols, 12 symbols in one subframe that can be used for uplink transmission are uplink OFDM symbols.

In the embodiment of the present invention, when performing symbol-level resource scheduling on a user, the gNB needs to measure the RI suffered by each OFDM symbol, and measures the RI strength of the OFDM symbol according to the interference measurement result. Optionally, when the RI strength of the OFDM symbol is measured, only the uplink OFDM symbol (OFDM symbol that can be used for uplink transmission) in each subframe may be measured; or the RI intensity of 14 OFDM symbols in a subframe is measured; or determining the uplink OFDM symbol interfered by the remote according to the interference measurement result, measuring the RI intensity of the uplink OFDM symbol interfered by the remote, and regarding the intensity of the symbol not interfered by the remote as 0 or very small.

Taking measurement of the RI strength of an uplink OFDM symbol interfered by a remote as an example, in the embodiment of the present invention, when interference measurement is performed on an OFDM symbol, it is first determined whether the uplink OFDM symbol is a symbol interfered by the remote according to an interference measurement result, and then the RI strength of the uplink OFDM symbol interfered by the remote is determined.

Optionally, when determining whether a symbol is an OFDM symbol subjected to remote interference, the interfered base station measures noise to determine an uplink OFDM symbol whose IoT is greater than a threshold, and when the interfered base station detects that the IoT of a certain uplink OFDM symbol is greater than the threshold and exhibits an RI characteristic, as shown in fig. 5B, the stepped characteristic is exhibited, and then it may be determined that the OFDM symbol is the OFDM symbol subjected to remote interference. After the OFDM symbol interfered by the remote is determined, the RI intensity of the symbol is calculated according to the interference measurement result.

As shown in fig. 5A, when an RI phenomenon exists, there are 4 interfering base stations in the graph, namely, an interfering gNB1, an interfering gNB2, an interfering gNB3, an interfering gNB4, and an interfered gNB, where all of the 4 interfering base stations cause a certain degree of remote interference to the interfered base station, and RIs of a plurality of different distances gNB are accumulated on the interfered side, so that a ratio of interference (including thermal noise) to thermal noise of the interfered side gNB shows an RI characteristic, as shown in fig. 5B, so that an IoT of an UL OFDM (Uplink Orthogonal Frequency Division Multiplexing) symbol shows an RI characteristic (IoT is stepped).

In the embodiment of the present invention, the interfered base station measures the RI strength of the uplink OFDM symbol specifically, the interfered base station uses the difference between the interference strength and the non-RI strength of the uplink OFDM symbol as the RI strength of the uplink OFDM symbol; the non-RI strength is an average value of the sum of interference and thermal noise power of an uplink OFDM symbol in M continuous sub-frames before an interfered base station receives RI, the interference strength is an average value of the sum of interference and thermal noise power of the uplink OFDM symbol in N continuous sub-frames after the interfered base station receives RI, and M and N are positive integers.

For example, any one uplink OFDM symbol: #1, when determining the RI strength of symbol #1, assuming that M ═ N ═ 5, the interfered base station is subjected to remote interference in the 6 th subframe, then the non-RI strength of symbol #1 is the average value X of the sum of interference and thermal noise power in the 5 th subframe before the base station is subjected to remote interference, where X ═(M1+ M2+ M3+ M4+ M5)/5, and Mi is the power of non-RI interference + thermal noise of symbol #1 in the i th subframe, (i ═ 1,2, …, 5); the interference strength of the symbol #1 is an average value Y of the sum of interference and thermal noise power in 5 subframes of the symbol after the base station is subjected to remote interference, wherein Y is (N6+ N7+ N8+ N9+ N10)/5, and Ni is the power of RI interference + non-RI interference + thermal noise in the ith subframe of the symbol #1 (i is 6, 7, …, 10); the RI intensity of symbol #1 is Y-X.

Specifically, first, interference measurement is performed, as shown in fig. 5C, which shows that the interfered base station receives RI in different subframes, interference of multiple symbols in multiple subframes is measured, and based on a standard and reasoning, the interfered side gNB may measure noise (including RI, non-RI interference and thermal noise) in one RB (Resource Block ) that is, one OFDM symbol. When the interfering side gNB detects that the IoT of the noise is greater than a certain threshold γ and exhibits RI characteristics, it can be determined that it suffers from RI, as shown in fig. 5B. At this time, the gNB keeps thermal noise and interference sampling for a period of time, assuming that there is one sampling point in each OFDM symbol, the gNB obtains a set of thermal noise and interference sample points including M subframes before RI occurs and N subframes after RI occurs through sampling in an observation window, as shown in fig. 6A, the set of sample points is:

{I_P，p∈{1，2，3...，(M+N)×14}}；

where p represents a sampling point and this set of sample points is divided: the sampling points before the RI characteristic of IoT occurs (i.e. when the interfered base station is not subjected to RI) are divided into sets:

I_NRI＝{I_p：p∈{1，2，...，14M}}；

dividing sampling points after the RI characteristic of IoT (i.e. after the interfered base station is not subjected to RI) into sets:

I_RI＝{I_P∶p∈{14M+1，14M+2，...，14×(M+N)}}；

and further from I_RIThe system determines the set of sampling points (OFDM symbols) that are actually subject to long-range interference:

I_RI-Exact＝{I_P：p∈{[14M+S_RI，...14M+d+E_RI]，...，[14(M+N-1)+S_RI，...14(M+N-1)+d+E_RI]}}

wherein S is_RISymbol sequence number indicating the beginning of RI in a subframe, E_RISymbol number indicating the end of RI in a subframe and further from I_RI-ExactClassify the d e { S } of the plurality of subframes affected by RI_RI，...，E_RISet of sample points:

for any one OFDM symbol, when determining the non-RI strength of the OFDM symbol, calculating an average value of the sum of interference and thermal noise power of the OFDM symbol in M consecutive subframes before the interfered base station is subjected to RI, assuming that statistical characteristics of non-RI interference and thermal noise experienced by all symbols in an observation window are unchanged, where the interference and thermal noise before being subjected to RI represent: non-RI and thermal noise, and therefore the non-RI strength of the OFDM symbol can be expressed by the following formula:

sigma (non-RI + thermal noise) is an arithmetic mean (I)_NRI)；

When determining the interference strength of the OFDM symbol, calculating an average value of the sum of interference and thermal noise power of the OFDM symbol in N consecutive subframes after the interfered base station receives the RI, where the interference and thermal noise after receiving the RI represent: non-RI, RI and thermal noise, can be calculated by the following equations:

finally passing through Ψ_dσ obtains an estimate of the RI strength of the d-th OFDM symbol affected by the long-range interference in a certain subframe:

according to the above method, assuming that the interfered side gNB detects that T OFDM symbols in the subframe K are interfered by RI, these symbol sets are represented as

The intensity of the same is shown as

Wherein I_rnIs shown as

The RI strength experienced by an OFDM symbol, as shown in fig. 6B, is in dBm.

In the embodiment of the present invention, assuming that the interfered gNB detects that IoT of an OFDM symbol in slot K exceeds-90 dBm, the OFDM symbol is considered to be interfered by RI. Assuming that 9 OFDM symbols in a subframe are subjected to RI interference (taking the special subframe slot ratio of 9: 3: 2 as an example here, that the first 9 OFDM symbols in a special subframe are used for uplink transmission, 3 OFDM symbols are guard intervals, and 2 OFDM symbols are used for downlink transmission), the noise power of the OFDM symbols exhibits an RI characteristic, as shown in fig. 7, which is specifically expressed as:

I_r0＞I_r1＞I_r2＞I_r3＞I_r4＞I_r5＞I_r6＞I_r7＞I_r8.

wherein I_rnIndicating the RI strength (n ═ 0,1,2, 3.., 13) experienced by the nth OFDM symbol, and the RI strength of the remaining 5 OFDM symbols is 0, i.e., I_r9、I_r1、I_r11、I_r12、I_r13Is 0.

In the embodiment of the present invention, after receiving a transmission request sent by a terminal, an interfered base station allocates an uplink OFDM symbol to the terminal according to the RI strength of the uplink OFDM symbol, where the allocation manner is specifically various, and the following includes:

in the first allocation mode, an interfered base station receives a transmission request sent by a terminal and allocates uplink OFDM symbols for the terminal according to the RI intensity of the uplink OFDM symbols.

Specifically, the interfered base station determines the number of OFDM symbols required by the terminal according to a transmission request sent by the terminal; and the interfered base station distributes the uplink OFDM symbols of the number of the OFDM symbols required by the terminal to the terminal according to the sequence from strong to weak of the RI intensity of the uplink OFDM symbols.

In the current subframe, assuming that the UE1 sends a data transmission request to the interfered gNB1, and the number of uplink OFDM symbols occupied by the request is L ═ 3(L ≦ 12), the gNB1 detects that 9 uplink OFDM symbols in the current subframe are interfered by RI, and the symbols are respectively symbols 0 to 8, and the RI strength of the symbol 0 is strongest, the RI strength of the symbol 8 is weakest, and the RI strengths of the symbols 0 to 8 decrease sequentially, then the uplink OFDM symbols allocated by the gNB1 to the UE1 are symbol 0, symbol 1, and symbol 2.

And in the second allocation mode, the interfered base station receives the transmission requests sent by the plurality of terminals and allocates the uplink OFDM symbols for the terminals according to the RI intensity of the uplink OFDM symbols and the position information of the terminals.

Specifically, the interfered base station determines a TA value corresponding to the terminal and the number of OFDM symbols required by the terminal according to a transmission request sent by the terminal; the interfered base station distributes uplink OFDM symbols of the number of the OFDM symbols required by the terminal to the terminal according to the TA value corresponding to the terminal and the RI intensity of the uplink OFDM symbols; the RI intensity of the uplink OFDM symbol allocated by the terminal with the small TA value is strong.

In the embodiment of the present invention, the gNB needs to acquire the location information of the UE, and in order to ensure that the data arrival times of the UEs at different distances are the same, the gNB allocates a time advance related to the distance to compensate for the effect of the time delay, so that the distance information between the UE and the gNB, that is, the location information of the UE can be represented, where a smaller TA value indicates that the UE is closer to the gNB, and a larger TA value indicates that the UE is farther from the gNB. Based on the position information of the UE and the uplink OFDM symbol, the gNB allocates the OFDM symbol with the severe RI to the UE with the small TA value, and allocates the OFDM symbol with the light RI to the UE with the large TA value.

Suppose that UEs 1-4 send data transmission requests to the gNB, and the number of OFDM symbols occupied by the requests is L-3. There are 12 uplink OFDM symbols in the current subframe, and the gNB obtains the TA value of each UE through the access request signal of the UE, and ranks the TA values to TA4> TA3> TA2> TA1, as shown in fig. 8, where TA1 to TA4 respectively represent TA values of UE1 to UE4, and thus it can be known that UE1 is closest to the base station and UE1 is farthest from the base station. According to the request of the UE, the gNB allocates uplink OFDM symbols to the UE, as shown in fig. 9, where the 4 th and 11 th OFDM symbols (i.e. symbol 3 and symbol 10) in the subframe where the slot K is located cannot be used for PUSCH transmission, and the RI strength suffered by the remaining OFDM symbols decreases sequentially from symbol 0 to symbol 13, then the uplink OFDM symbols allocated by the UE1 are symbols 0-2, the uplink OFDM symbols allocated by the UE2 are symbols 4-6, the uplink OFDM symbols allocated by the UE3 are symbols 7-9, and the uplink OFDM symbols allocated by the UE4 are symbols 11-13.

In the embodiment of the invention, if the number of the uplink OFDM symbols allocated to the terminal by the interfered base station is less than the number of the OFDM symbols required by the terminal, the uplink OFDM symbols are reallocated to the terminal in the next subframe.

Suppose that UEs 1-4 send data transmission requests to the gNB, and the number of OFDM symbols occupied by the requests is L-4. Wherein, the UE4 is farthest from the base station, the number of uplink OFDM symbols allocated by the UE4 is 0, which is less than 4 of the number L of OFDM symbols required by the UE4, so that the uplink OFDM symbols are reallocated to the UE4 in the next subframe. Assuming that no UE generates a transmission request in the next subframe N, 4 OFDM symbols are allocated to the UE4 according to the RI strength of the uplink OFDM symbol in the subframe N, and if two UEs transmit transmission requests in the subframe K, which are respectively the UE5 and the UE6, uplink OFDM symbols are allocated to the UE4, the UE5 and the UE6 according to the position information of the UE4, the UE5 and the UE6 and the RI strength of the uplink OFDM symbol in the subframe N. Generally, the OFDM symbols allocated to the terminal are not smaller than the required number of OFDM symbols, and an upper MAC (Media Access Control) layer performs Control.

In the embodiment of the present invention, when the interfered base station allocates an OFDM symbol to the terminal, the gNB notifies the uplink OFDM symbol that can be used for PUSCH data transmission to the UE through DCI (Downlink Control Information) in a PDCCH (Physical Downlink Control Channel) according to a request of the UE.

The gNB allocates OFDM symbols by configuring a UE with a slot offset value K2, a PUSCH mapping type and a SLIV (Start and length indicator value) value of 3 parameters. The timeslot offset value K2 is an offset value of a timeslot occupied by the UE with respect to a position of DCI (Downlink Control Information) received by the UE. The relationship between the value of the starting symbol S and the occupied symbol length L allocated by the base station to the UE and the mapping type (mapping type) of the PUSCH is shown in table 1.

mapping type	S	L	S+L
				Type A	0	{4,....,14}	{4,....,14}
Type B	{0,....,13}	{1,....,14}	{1,....,14}

TABLE 1S, L and map type relationships

In the embodiment of the present invention, the calculation formulas of the starting symbol S, the occupied symbol length L, and the SLIV value are as follows:

IF(L-1)≤7THEN

SLIV＝14·(L-1)+S

ELSE

SLIV＝14·(14-L+1)+(14-1-S)

in the embodiment of the invention, the gNB allocates the OFDM symbols for the UE sending the transmission request in sequence according to the RI intensity condition of the uplink OFDM symbol or the RI intensity condition of the uplink OFDM symbol and the TA value of the UE according to the number of symbols occupied by the uplink transmission request of the UE and the rules. The gNB allocates OFDM symbols by configuring the UE with a slot offset value K2, PUSCH mapping type and SLIV value 3 parameters.

Suppose that uplink OFDM symbols allocated by the gNB for the UE1 are symbols 0 to 2, uplink OFDM symbols allocated by the UE2 are symbols 4 to 6, uplink OFDM symbols allocated by the UE3 are symbols 7 to 9, uplink OFDM symbols allocated by the UE4 are symbols 11 to 13, and the gNB sequentially allocates OFDM symbols for the UEs 1 to 4 according to table 2, where the symbol 3 and the symbol 10 cannot be used for uplink data transmission.

User' s	S	L	SLIV
				UE
1	0	3	28
				UE 2	4	3	32
UE 3	7	3	35
				UE 4	11	3	39

TABLE 2 SLIV values assigned by gNB for UE

As shown in fig. 10, assuming that K2 configured by the gNB for the UEs 1 to 4 is 1, the SLIV is as shown in table 2, the PUSCH mapping Type is Type B, and the DCI in the PDCCH is used to notify the UEs 1 to UE4, then the UEs 1 to UE4 perform uplink data transmission according to the uplink OFDM symbols allocated by the gNB.

In the embodiment of the invention, after receiving the transmission request sent by the terminal, the interfered base station sends the power control parameter related to the terminal, so that the terminal regulates and controls the transmitting power according to the received power control parameter.

Wherein the power control parameters associated with the terminal include, but are not limited to, some or all of the following:

maximum transmit power, system nominal power in nominal power, path loss compensation factor, bandwidth, modulation coding scheme, closed loop power control parameters, initial user specific nominal power.

In the embodiment of the invention, a symbol index term n is added on the basis of the original PUSCH power control formula, and the value range is 0-13 (representing 14 OFDM symbols in a subframe, wherein one subframe can be divided into two time slots). The maximum transmission power, bandwidth, etc. of the OFDM symbol are the same for different symbols in one subframe, except for the RI strength of the OFDM symbol.

For example, in the network access stage of UEm (i.e. after the interfered base station receives the transmission request sent by terminal UEm), the gNB in cell c informs UEm through system information broadcast that it occupies the ith slot and the maximum transmission power P of the nth OFDM symbol_CMAX，c(i, n), nominal power P_{O_PUSCH，c}Nominal power P of system in_{O_NOMINAL_PUSCH，c}And a path loss compensation factor alpha_c(UEm measures path loss PL_c). UEm is then informed via PDCCH of its bandwidth M per OFDM symbol_PUSCH，c(i, n), modulation coding scheme Δ_TF，c(i, n) and a closed loop power control parameter f_c(i, n). Finally, the gNB uses a dedicated RRC (Radio Resource Control) signaling in a PDSCH (Physical Downlink Shared Channel) ChannelInforming UEm of its initial user-specific nominal power P_{O_UE_PUSCH，c}(j, n). After receiving these parameters, UEm determines its transmit power (in dBm) according to the power control formula of PUSCH given in TS 36.213 and the above parameters, namely:

where i denotes a time slot occupied by UEm and j denotes an open loop power index. In order to better resist the influence of RI, the transmission power of each OFDM symbol of UEm needs to be increased, so a symbol index term n is added to the PUSCH power control formula on the basis of the original PUSCH power control formula, and the value range is 0-13.

Furthermore, P_CMAX，c(i, n) represents a maximum transmission power of an nth OFDM symbol of an ith slot allocated for UEm; m_PUSCH，c(i, n) a number of radio resource blocks of an nth OFDM symbol of an ith slot allocated for the UEm; alpha is alpha_c(j)·PL_cRepresenting open loop path loss compensation; delta_TF，c(i, n) represents a component determined by an MCS (Modulation and Coding Scheme); f. of_c(i, n) represents a closed loop power control parameter.

In the embodiment of the invention, when the interfered base station detectsAfter RI is detected and OFDM symbols are allocated to a terminal, different powers (different transmission powers are allocated to different OFDM symbols of the UE) are allocated to the UE according to the RI intensity suffered by the different OFDM symbols so as to ensure the SINR performance of the UE, and in consideration of the huge backhaul overhead required by closed-loop power control, an open-loop power control item P of the UE m is adjusted_{O_PUSCH，c}(j，n)＝P_{O_NOMINAL_PUSCH，c}(j)+P_{O_UE_PUSCH，c}(j, n) to counter the effects of RI, P_{O_UE_PUSCH，c}(j, n) is updated to P'_{O_UE_PUSCH，c}Recalculating P after (j, n)_{O_PUSCH，c}(j，n)。

Optionally, after allocating an OFDM symbol to the terminal, the interfered base station allocates different transmission powers to each OFDM symbol according to RI strengths of different OFDM symbols scheduled by the terminal, so as to ensure SINR performance of the terminal. Specifically, after the interfered base station receives the transmission request sent by the terminal and allocates the uplink OFDM symbol to the terminal according to the RI strength of the uplink OFDM symbol, the interfered base station determines the specific nominal power of the uplink OFDM symbol according to the RI strength of the uplink OFDM symbol and sends the specific nominal power of the uplink OFDM symbol to the terminal, so that the terminal updates the open-loop power control item in the transmission power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

In the embodiment of the present invention, when the interfered base station determines the specific nominal power of the uplink OFDM symbol according to the RI strength of the uplink OFDM symbol, the power P when the SINR of the interfered base station after being subjected to the RI is consistent with the SINR of the interfered base station before being subjected to the RI is determined according to the RI strength of the uplink OFDM symbol, and then the specific nominal power of the uplink OFDM symbol is determined according to the power P, where the power P determined by the interfered base station is a linear value of the specific nominal power corresponding to the uplink OFDM symbol.

Specifically, when the interfered base station is not subjected to RI, according to P₁、N₀H determines SINR P when the base station is not subjected to RI₁*H/N₀Wherein the power P₁Linear value, N, representing a specific nominal power of the terminal₀H denotes channel gain, thermal noise + original interference (non-RI interference).

When interfered base station is subjected to RIWhen an RI interference, power P, is added₂A linear value representing a specific nominal power of an OFDM symbol, since the strength of remote interference varies from OFDM symbol to OFDM symbol (RI strength I)_rnDifferent) when different OFDM symbols correspond to different powers P₂In order to ensure the SINR of the UE, the power P is determined when the SINR of the interfered base station after being subjected to the RI is consistent with the SINR before being subjected to the RI₂And in turn determines the particular nominal power of the OFDM symbol.

Since SINR is equal to P₂*H/(I_rn+N₀)＝P₁*H/N₀(H and N)₀Same) thus P₂＝(1+I_rn/N₀)*P₁Since the specific nominal power P is in dBm form, P is_{O_UE_PUSCH，c}＝10log₁₀(P₁)，P’_{O_UE_PUSCH，c}＝10log₁₀(P₂) Of so P'_{O_UE_PUSCH，c}＝P_{O_UE_PUSCH，c}+10log₁₀(1+I_rn/N₀). That is, the specific nominal power of the uplink OFDM symbol is determined by the following formula:

P′_{O_UE_PUSCH,c}(j,n)＝P_{O_UE_PUSCH,c}(j,n)+10log₁₀(1+I_rn/N₀)

wherein, P_{O_UE_PUSCH,c}(j, n) refers to the initial user specific nominal power (i.e. the initial specific nominal power of the terminal, after the terminal is allocated with the OFDM symbols, the specific nominal power of each symbol can be determined according to the RI strength of each symbol), I_rnIs RI strength of OFDM symbol N (N is 0,1,2, …, 13), N₀Representing the thermal noise and the original interference (non-RI interference) of the terminal (assuming N of all OFDM symbols of all terminals in a cell₀The same).

For example, adjusting the open-loop power control term of the UE1 to counter the effects of RI, when the UE1 enters the network, the gNB transmits the system nominal power P for the UE1_{O_NOMINAL_PUSCH,c}(j) (the same for all UEs in the system), the range of values is-126 dBm- +24 dBm. The gNB then allocates an initial UE-specific nominal power P to the UE1 according to its specifics_{O_UE_PUSCH,c}(j, n) which is the deviation of the nominal power of the system to a value in the rangeThe range is-8 dB- +7 dB. The open loop power control value ultimately assigned to the UE1 is the sum of the two.

When the gNB detects RI interference and allocates the 0,1,2 uplink OFDM symbols of the K slot for the UE1, the gNB performs the RI detection according to the RI intensity I on the OFDM symbols of the UE1_r0、I_r1And I_r2Reconfiguring a particular nominal power P 'of an uplink OFDM symbol for UE 1'_{O_UE_PUSCH,c}(j, n), j being 1, n being 0,1,2, specifically expressed as:

P′_{O_UE_PUSCH,c}(j,0)＝P_{O_UE_PUSCH,c}(j,0)+10log₁₀(1+I_r0/N₀)；

P′_{O_UE_PUSCH,c}(j,1)＝P_{O_UE_PUSCH,c}(j,1)+10log₁₀(1+I_r1/N₀)；

P′_{O_UE_PUSCH,c}(j,2)＝P_{O_UE_PUSCH,c}(j,2)+10log₁₀(1+I_r2/N₀)。

subsequently, gNB will update UE specific nominal power P'_{O_UE_PUSCH,c}(j, n), j is 1, n is 0,1,2 (i.e. the specific nominal power of each uplink OFDM symbol allocated by the UE) is sent to the UE1 again through the PDSCH. After receiving the information, the UE1 updates its UE-specific nominal power to update the open-loop power control term, and calculates the transmit power capable of countering the RI effect, which is equivalent to increasing the transmit power of the UE to countering the RI effect.

In the embodiment of the invention, after the interfered base station determines the specific nominal power of the OFDM symbol allocated to the UE and sends the specific nominal power to the terminal, the terminal updates the open-loop power control item in the transmitting power of the uplink OFDM symbol according to the received specific nominal power of the OFDM symbol.

Specifically, the terminal is according to the received specific nominal power P'_{O_UE_PUSCH,c}(j, n) and system nominal power P transmitted to terminal by interfered base station when UE accesses network_{O_NOMINAL_PUSCH,c}(j) And determining an open-loop power control item corresponding to each OFDM symbol, and further updating the transmitting power of the uplink OFDM symbol.

Wherein, the open-loop power control item corresponding to each OFDM symbol is the sum of the system nominal power and the specific nominal power of the OFDM symbol.

In the embodiment of the present invention, taking the OFDM symbol division shown in fig. 9 as an example, there are 4 terminals, where TA values are ranked in order of TA1< TA2< TA3< TA4, bit error rates before and after power control are performed on UEs 1 to 4 allocated with uplink OFDM symbols, as shown in fig. 12A and 12B, fig. 12A shows a bit error rate simulation diagram of each UE before power control is performed on the UE, fig. 12B shows a bit error rate simulation diagram of each UE after power control is performed on the UE, where an abscissa shows SNR (Signal-Noise Ratio) of the UE and a unit is dB, as can be seen from comparison between fig. 12A and 12B, the bit error rates of UEs 1 to UE3 are reduced, the bit error rate of UE4 does not change greatly, because the OFDM symbols allocated for UE4 are equivalent to OFDM symbols 11 to 13 which are not interfered by RI, and RI is small (can be regarded as strength 0), so that the bit error rate does not change greatly before and after power control is performed on UE4, since the UE4 is far from the base station itself, the ICI it receives is small, the impact is not great, and the error rate of the UE4 is originally small; it is clear that the error rate is reduced after power control is performed for the UEs 1 to 3.

In the embodiment of the invention, after updating the transmitting power of the uplink OFDM symbol, the terminal transmits data according to the OFDM symbol allocated to the terminal by the interfered base station and the transmitting power corresponding to each OFDM symbol. When a plurality of terminals request to transmit data, the method not only improves the transmitting power of the UE closer to the center of the cell and reduces the influence of RI, but also ensures that the UE closer to the edge of the cell suffers from smaller RI intensity, smaller transmitting power and smaller leakage interference.

As shown in fig. 11, a schematic diagram of a change of leakage interference before and after user scheduling provided in an embodiment of the present invention is shown, in the diagram, an abscissa indicates an OFDM symbol, a total coordinate indicates leaked ICI, and the ratio of leakage power to transmission power indicates that, compared to before a user performs uplink OFDM symbol scheduling, it is obvious that interference leaked to other cells is reduced after performing uplink OFDM symbol scheduling.

As shown in fig. 12C, when the UE transmit power is fixed and there are amplitude errors of different degrees in the RI detection on the OFDM symbols, an error rate situation simulation diagram of each UE is provided, where an abscissa represents an RI intensity amplitude error (%), and an ordinate represents an error rate of the UE, and the error rate does not change much for the UE4, because the OFDM symbols 11 to 13 which are allocated to the UE4 and are not interfered by the RI are small in RI intensity (which may be regarded as intensity 0), the error rate is not greatly affected by the amplitude error, and the error rate of the UE4 is originally small, and for the UEs 1 to 3, it is obvious that the larger the amplitude error is, the larger the error rate is.

In the method and the device for scheduling the resource of the terminal by the base station in the embodiment of the invention, when RI phenomenon exists, the uplink OFDM symbol is distributed to the terminal according to the RI intensity borne by the uplink OFDM symbol, so that the resource scheduling of symbol level is realized.

As shown in fig. 13, an embodiment of the present invention provides a complete method for resource scheduling for a user, which specifically includes the following steps:

step 1300, the interfered base station measures the interference suffered by the OFDM symbol and the noise of the receiver;

step 1301, the interfered base station determines the RI intensity of the uplink OFDM symbol according to the measurement result;

step 1302, after receiving transmission requests sent by a plurality of terminals, an interfered base station determines the number of OFDM symbols occupied by the transmission requests and the TA value of the terminal;

step 1303, the interfered base station allocates the uplink OFDM symbols of the OFDM symbol number occupied by the request to the terminal according to the TA value of the terminal, the number of the OFDM symbols occupied by the transmission request, and the RI strength of the uplink OFDM symbols, wherein the RI strength of the uplink OFDM symbols allocated by the terminal with a small TA value is strong;

step 1304, the interfered base station determines the specific nominal power of each OFDM symbol according to the RI intensity of the uplink OFDM symbol allocated to the terminal;

step 1305, the interfered base station sends the determined specific nominal power of each OFDM symbol to the terminal, so that the terminal updates an open-loop power control item in the transmit power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol, and re-determines the transmit power of the terminal.

Based on the same inventive concept, the embodiment of the present invention further provides a device for a base station to perform resource scheduling on a terminal, and since the device is a device in the method in the embodiment of the present invention and the principle of the device to solve the problem is similar to that of the method, the implementation of the device may refer to the implementation of the method, and repeated details are not repeated.

As shown in fig. 14, an embodiment of the present invention further provides a device for a base station to perform resource scheduling on a terminal, where the device includes: at least one processing unit 1400, and at least one storage unit 1401, wherein the storage unit 1401 stores program code that, when executed by the processing unit 1400, causes the processing unit 1400 to perform the following:

measuring the RI intensity of the uplink OFDM symbol;

Optionally, the processing unit 1400 is specifically configured to:

aiming at any uplink OFDM symbol, taking the difference value between the interference intensity and the non-RI intensity of the uplink OFDM symbol as the RI intensity of the uplink OFDM symbol;

Optionally, a transmission request sent by a terminal is received;

the processing unit 1400 is specifically configured to:

Optionally, receiving transmission requests sent by a plurality of terminals;

the processing unit 1400 is specifically configured to:

Optionally, the processing unit 1400 is further configured to:

Optionally, the processing unit 1400 is specifically configured to:

aiming at any uplink OFDM symbol, the interfered base station determines the specific nominal power of the uplink OFDM symbol according to the RI intensity of the uplink OFDM symbol;

Optionally, the processing unit 1400 is specifically configured to:

aiming at any uplink OFDM symbol, determining power P according to the RI intensity of the uplink OFDM symbol, and determining the specific nominal power of the uplink OFDM symbol according to the power P;

As shown in fig. 15, an apparatus for scheduling resources to a terminal by a base station according to an embodiment of the present invention includes: measurement module 1500 and processing module 1501:

a measuring module 1500, configured to measure the RI strength of the uplink OFDM symbol;

the processing module 1501 is configured to allocate the uplink OFDM symbol to the terminal according to the RI strength of the uplink OFDM symbol after receiving a transmission request sent by the terminal.

Optionally, the measurement module 1500 is specifically configured to:

Optionally, a transmission request sent by a terminal is received;

the processing module 1501 is specifically configured to:

Optionally, receiving transmission requests sent by a plurality of terminals;

the processing module 1501 is specifically configured to:

Optionally, the processing module 1501 is further configured to:

Optionally, the processing module 1501 is specifically configured to:

aiming at any uplink OFDM symbol, determining the specific nominal power of the uplink OFDM symbol according to the RI intensity of the uplink OFDM symbol;

Optionally, the processing module 1501 is specifically configured to:

In order to ensure that the leakage ICI is small in the current TDD network, a system power control method is usually adopted, one method is to utilize information such as a high-level interference indication signaling of an adjacent cell in an uplink of an LTE system and path loss from a user terminal in the cell to a base station of the cell and a base station of the adjacent cell, divide uplink users in the cell into two categories, namely strong interference and weak interference, and set different path loss factors α for the two types of users to reduce the ICI; the other is that the base station firstly detects that the cell generates serious ICI to the adjacent cell, then detects that the interference source of the cell is high-power user equipment, and finally reduces the transmission power of the high-power user equipment by reducing the target SINR of the high-power user equipment, thereby reducing the ICI.

However, the existing power control methods do not consider how to reduce the effect of RI when there is remote interference between base stations, so that the effect of reducing ICI when there is remote interference between base stations is not good.

As shown in fig. 16, a system for controlling power of a terminal by a base station according to an embodiment of the present invention includes: interfered base station 10 and terminal 20.

The interfered base station 10 is configured to determine a specific nominal power of an uplink OFDM symbol according to an RI strength of the uplink OFDM symbol allocated to the terminal; and sending the specific nominal power of the uplink OFDM symbol to the terminal so that the terminal determines the transmitting power of the uplink OFDM symbol according to the specific nominal power.

A terminal 20, configured to receive a specific nominal power of an uplink OFDM symbol allocated to the terminal by an interfered base station, where the specific nominal power is determined by the interfered base station according to an RI strength of the uplink OFDM symbol, and the interfered base station is a base station when an IoT exhibits an RI characteristic and/or an IoT of at least one OFDM symbol is greater than a threshold; and determining the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

According to the scheme, the interfered base station determines the specific nominal power of each OFDM symbol allocated by the terminal according to the RI strength suffered by the uplink OFDM symbol allocated to the terminal and sends the specific nominal power to the terminal, the terminal determines the transmitting power of each symbol according to the received specific nominal power and determines the transmitting power capable of resisting the RI influence on each OFDM symbol, and then the terminal adopts the transmitting power of the OFDM symbol on the uplink OFDM symbol allocated to the terminal to carry out data transmission, so that the power regulation and control of a symbol level are realized, the influence of remote interference is reduced, and meanwhile, the ICI leakage is reduced.

In the embodiment of the invention, after the terminal receives the power control parameter related to the terminal sent by the interfered base station, the transmitting power of the terminal is determined according to the PUSCH power control formula.

Optionally, a symbol index term n is added on the basis of the original PUSCH power control formula, and the value range is 0-13 (representing 14 OFDM symbols in one subframe, where one subframe may be divided into two slots). The maximum transmission power, bandwidth, etc. of the OFDM symbol are the same for different symbols in one subframe, except for the RI strength of the OFDM symbol.

For example, in the network access stage of UEm (i.e. after the interfered base station receives the transmission request sent by terminal UEm), the gNB in cell c informs UEm through system information broadcast that it occupies the ith slot and the maximum transmission power P of the nth OFDM symbol_CMAX，c(i, n), nominal power P_{O_PUSCH，c}In (1)Nominal power P of the system_{O_NOMINAL_PUSCH，c}And a path loss compensation factor alpha_c(UEm measures path loss PL_c). UEm is then informed via PDCCH of its bandwidth M per OFDM symbol_PUSCH，c(i, n), modulation coding scheme Δ_TF，c(i, n) and a closed loop power control parameter f_c(i, n). Finally the gNB signals UEm via the dedicated RRC in the PDSCH channel, its initial user specific nominal power P_{O_UE_PUSCH，c}(j，n)。

After receiving these parameters, UEm determines its transmit power (in dBm) according to the power control formula of PUSCH given in TS 36.213 and the above parameters, namely:

In the embodiment of the invention, considering that the closed loop power control needs huge backhaul overhead, the open loop power control item P of UEm is adjusted_{O_PUSCH，c}(j，n)＝P_{O_NOMINAL_PUSCH，c}(j)+P_{O_UE_PUSCH，c}(j, n) to counter the effects of RI.

Specifically, the interfered base station determines the specific nominal power of the uplink OFDM symbol according to the RI strength of the uplink OFDM symbol allocated to the terminal, and sends the specific nominal power of the uplink OFDM symbol to the terminal, so that the terminal determines the transmission power of the uplink OFDM symbol according to the specific nominal power.

For any uplink OFDM symbol, when the interfered base station of the network side equipment determines the specific nominal power of the uplink OFDM symbol according to the RI intensity of the uplink OFDM symbol, the power P is determined according to the RI intensity of the uplink OFDM symbol when the SINR of the interfered base station after being subjected to the RI is consistent with the SINR before being subjected to the RI, and then the specific nominal power of the uplink OFDM symbol is determined according to the power P, wherein the power P determined by the interfered base station is a linear value of the specific nominal power corresponding to the uplink OFDM symbol.

When the interfered base station receives RI, the RI interference is added, and the power P₂A linear value representing a specific nominal power of an OFDM symbol, since the strength of remote interference varies from OFDM symbol to OFDM symbol (RI strength I)_rnDifferent) when different OFDM symbols correspond to different powers P₂In order to ensure the SINR of the UE, the power P is determined when the SINR of the interfered base station after being subjected to the RI is consistent with the SINR before being subjected to the RI₂And in turn determines the particular nominal power of the OFDM symbol.

P′_{O_UE_PUSCH,c}(j,n)＝P_{O_UE_PUSCH,c}(j,n)+10log₁₀(1+I_rn/N₀)

For example, adjusting the open-loop power control term of the UE1 to counter the effects of RI, when the UE1 enters the network, the gNB transmits the system nominal power P for the UE1_{O_NOMINAL_PUSCH,c}(j) (the same for all UEs in the system), the range of values is-126 dBm- +24 dBm. The gNB then allocates an initial UE-specific nominal power P to the UE1 according to its specifics_{O_UE_PUSCH,c}And (j, n), wherein the value is used for offsetting the nominal power of the system and ranges from-8 dB (decibel) to +7 dB. The open loop power control value ultimately assigned to the UE1 is the sum of the two.

P′_{O_UE_PUSCH,c}(j,0)＝P_{O_UE_PUSCH,c}(j,0)+10log₁₀(1+I_r0/N₀)；

P′_{O_UE_PUSCH,c}(j,1)＝P_{O_UE_PUSCH,c}(j,1)+10log₁₀(1+I_r1/N₀)；

P′_{O_UE_PUSCH,c}(j,2)＝P_{O_UE_PUSCH,c}(j,2)+10log₁₀(1+I_r2/N₀)。

subsequently, gNB will update UE specific nominal power P'_{O_UE_PUSCH,c}(j, n), j is 1, n is 0,1,2 (i.e. on each UE allocation)The particular nominal power of the row OFDM symbol) is retransmitted to the UE1 over the PDSCH.

In the embodiment of the invention, the terminal receives the specific nominal power of the uplink OFDM symbol distributed by the interfered base station for the terminal and sent by the interfered base station, and then determines the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol. And finally, the terminal adopts the re-determined transmitting power of the uplink OFDM symbol to perform data transmission on the corresponding uplink OFDM symbol.

For example, UE1 receives P 'transmitted by interfered base station'_{O_UE_PUSCH,c}After (j, n), j is 1, n is 0,1,2, the UE-specific nominal power is updated to update the open-loop power control term, and the transmission power capable of resisting the RI influence is calculated, which is equivalent to increasing the transmission power of the UE to resist the RI influence. Finally, the UE1 performs data transmission on the OFDM symbol allocated to it by the interfered base station with the re-determined transmit power capable of countering the RI effect.

The embodiment of the invention provides a method and equipment for a base station to control the power of a terminal, wherein an interfered base station determines the specific nominal power of each OFDM symbol allocated by the terminal according to the RI intensity suffered by an uplink OFDM symbol allocated to the terminal, and the terminal transmits data on the uplink OFDM symbol allocated to the terminal by adopting the transmitting power of the OFDM symbol determined according to the specific nominal power of the OFDM symbol, so that the power regulation at a symbol level is realized, the influence of remote interference is reduced, and meanwhile, the leakage ICI is reduced.

As shown in fig. 17, an embodiment of the present invention provides a method for a base station to perform power control on a terminal, which specifically includes the following steps:

step 1700, an interfered base station determines a specific nominal power of an uplink OFDM symbol according to the RI strength of the uplink OFDM symbol allocated to a terminal, wherein the interfered base station is a base station when the IoT presents the RI characteristic and/or the IoT of at least one OFDM symbol is larger than a threshold value;

step 1701, the interfered base station sends the specific nominal power of the uplink OFDM symbol to the terminal, so that the terminal determines the transmitting power of the uplink OFDM symbol according to the specific nominal power.

Optionally, the determining, by the interfered base station, the specific nominal power of the uplink OFDM symbol according to the uplink OFDM symbol allocated to the terminal includes:

aiming at any uplink OFDM symbol, the interfered base station determines power P according to the RI intensity of the uplink OFDM symbol and determines specific nominal power of the uplink OFDM symbol according to the power P;

As shown in fig. 18, an embodiment of the present invention provides a method for a base station to perform power control on a terminal, which specifically includes the following steps:

step 1800, a terminal receives a specific nominal power of an uplink OFDM symbol allocated to the terminal by an interfered base station, wherein the specific nominal power is determined by the interfered base station according to the RI strength of the uplink OFDM symbol, and the interfered base station is a base station when IoT exhibits RI characteristics and/or IoT of at least one OFDM symbol is greater than a threshold;

step 1801, the terminal determines the transmission power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

As shown in fig. 19, a flowchart of a complete method for power regulation according to an embodiment of the present invention specifically includes the following steps;

step 1900, the terminal sends a transmission request to the interfered base station;

1901, the interfered base station receives a transmission request sent by the terminal;

step 1902, the interfered base station sends the power control parameter of the terminal to the terminal;

1903, the terminal receives the power control parameter of the terminal sent by the interfered base station;

1904, the terminal determines the transmitting power of the terminal according to the received power control parameter and the power control formula of the PUSCH;

step 1905, after detecting RI interference and allocating OFDM symbols to the terminal, the interfered base station determines the specific nominal power of each OFDM symbol according to the RI strength of the OFDM symbol;

step 1906, the interfered base station sends the specific nominal power of the OFDM symbol to the terminal;

step 1907, the terminal receives a specific nominal power of the OFDM symbol;

in step 1908, the terminal determines the transmit power of each OFDM symbol according to the specific nominal power of the received OFDM symbol.

Based on the same inventive concept, the embodiment of the present invention further provides a device for a base station to perform power control on a terminal, and since the device is a device in the method in the embodiment of the present invention and the principle of the device to solve the problem is similar to that of the method, the implementation of the device may refer to the implementation of the method, and repeated details are not repeated.

As shown in fig. 20, an embodiment of the present invention further provides an apparatus for controlling power of a terminal by a base station, where the apparatus includes: at least one processing unit 2000 and at least one memory unit 2001, wherein the memory unit 2001 has stored program code which, when executed by the processing unit 2000, causes the apparatus to perform the following:

Optionally, the processing unit 2000 is specifically configured to:

As shown in fig. 21, an embodiment of the present invention further provides a device for a base station to perform power control on a terminal, where the device includes: determination module 2100 and sending module 2101:

the determination module 2100: determining the specific nominal power of an uplink OFDM symbol according to the RI intensity of the uplink OFDM symbol distributed to a terminal;

the sending module 2101: and sending the specific nominal power of the uplink OFDM symbol to the terminal so that the terminal determines the transmitting power of the uplink OFDM symbol according to the specific nominal power.

Optionally, the determining module 2100 is specifically configured to:

As shown in fig. 22, an embodiment of the present invention further provides an apparatus for controlling power of a terminal by a base station, where the apparatus includes:

at least one processing unit 2200 and at least one storage unit 2201, wherein the storage unit 2201 stores program code that, when executed by the processing unit 2200, causes the apparatus to perform the following:

As shown in fig. 23, an embodiment of the present invention further provides a device for a base station to perform power control on a terminal, where the device includes: receiving module 2300 and determining module 2301:

the receiving module 2300: receiving a specific nominal power of an uplink OFDM symbol allocated to the terminal by an interfered base station, wherein the specific nominal power is determined by the interfered base station according to the RI strength of the uplink OFDM symbol, and the interfered base station is a base station when the IoT presents the RI characteristic and/or the IoT of at least one OFDM symbol is larger than a threshold value;

the determination module 2301: and determining the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol.

An embodiment of the present invention further provides a computer-readable non-volatile storage medium, which includes a program code, and when the program code runs on a computing terminal, the program code is configured to enable the computing terminal to execute the steps of the method for resource scheduling and power control according to the embodiment of the present invention.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for a base station to perform resource scheduling on a terminal is characterized in that the method comprises the following steps:

measuring Remote Interference (RI) strength of an uplink Orthogonal Frequency Division Multiplexing (OFDM) symbol by an interfered base station, wherein the interfered base station is a base station which presents RI characteristics for a thermal noise interference (IoT) and/or the IoT of at least one OFDM symbol is larger than a threshold value;

2. The method of claim 1, wherein the interfered base station measuring the Remote Interference (RI) strength of an uplink Orthogonal Frequency Division Multiplexing (OFDM) symbol comprises:

3. The method of claim 1, wherein the interfered base station receives a transmission request sent by a terminal;

4. The method of claim 1, wherein the interfered base station receives transmission requests sent by a plurality of terminals;

the interfered base station determines a TA value corresponding to the terminal and the number of OFDM symbols required by the terminal according to a transmission request sent by the terminal;

5. The method of claim 1, wherein the interfered base station, after receiving the transmission request sent by the terminal and allocating the uplink OFDM symbol to the terminal according to the RI strength of the uplink OFDM symbol, further comprises:

the interfered base station sends the specific nominal power of the uplink OFDM symbol to the terminal so that the terminal updates an open-loop power control item in the transmitting power of the uplink OFDM symbol according to the specific nominal power of the uplink OFDM symbol;

wherein the power P is a power at which the SINR of the base station after the RI is received is equal to the SINR of the base station before the RI is received.

6. A method for a base station to perform power control on a terminal, the method comprising:

7. The method of claim 6, wherein the interfered base station determining the specific nominal power of the uplink OFDM symbol according to the uplink OFDM symbol allocated to the terminal comprises:

8. A method for a base station to perform power control on a terminal, the method comprising:

9. An apparatus for a base station to perform resource scheduling for a terminal, the apparatus comprising: at least one processing unit and at least one memory unit, wherein the memory unit stores program code which, when executed by the processing unit, enables the at least one processing unit to perform the method according to any of claims 1-5.

10. An apparatus for a base station to perform power control on a terminal, the apparatus comprising: at least one processing unit and at least one memory unit, wherein the memory unit stores program code which, when executed by the processing unit, enables the at least one processing unit to perform the method according to any one of claims 6-7 or the method according to claim 8.