CN111447020B - Interference processing method and system applied to power wireless private network - Google Patents
Interference processing method and system applied to power wireless private network Download PDFInfo
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Abstract
The invention discloses an interference processing method and system applied to a power wireless private network, wherein in each wireless frame, the number of sub-bands influenced by strong interference in the wireless frame is determined according to a received uplink signal; if the number of the sub-bands is larger than a preset number threshold value, determining that the wireless frame has strong broadband interference; and generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference. According to the invention, the frame structure does not need to be modified, the base station can judge the existence of the interference based on the scheduling result, and then interference avoidance measures can be taken, so that the interference can be detected more timely to meet the actual requirement.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an interference processing method and system applied to a wireless private power network.
Background
In a networking test project of a 230M electric power wireless private network, through analyzing interference monitoring data, it is found that strong interference exists in a 230 frequency band in a full frequency band: all carrier wave background noises in the frequency band are raised by more than 10dB, and the interference duration is about 3-12 seconds long. Such disturbances occur 5, 6 times a day, most concentrated from 10 pm to 9 am. The broadband interference is mainly found by checking interference sources, and mainly comprises LED lamps and advertising boards. When the power wireless private network is actually deployed, the interference is large, the influence on network coverage is serious, the interference source distribution is general, and the frequency is difficult to clear thoroughly.
The existing interference detection method, for example, a channel state detection scheme based on an lbt (listen before talk) channel contention access mechanism is adopted, needs to modify a power wireless private network bottom layer specification, has a large workload, and cannot be applied to a deployed network. If the interference detection scheme based on the periodic reporting of the terminal is adopted, the terminal measurement report value cannot reflect the intermittent broadband interference in the electric power wireless private network due to long-term filtering. Therefore, the existing interference detection method cannot timely detect the interference and cannot meet the actual requirement.
Disclosure of Invention
In view of the above problems, the present invention provides an interference processing method and system for a wireless private power network, which can detect interference in time and meet practical requirements.
In order to achieve the purpose, the invention provides the following technical scheme:
an interference processing method applied to a power wireless private network, the method comprising:
in each wireless frame, determining the number of sub-bands influenced by strong interference in the wireless frame according to the received uplink signal;
if the number of the sub-bands is larger than a preset number threshold value, determining that the wireless frame has strong broadband interference;
and generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference.
Optionally, the determining, according to the received uplink signal, the number of subbands affected by strong interference in the radio frame includes:
estimating the signal-to-interference-and-noise ratio of a received signal of a received uplink signal based on a reference signal on a subband with uplink scheduling;
and if the signal-to-interference-and-noise ratio is smaller than a preset first threshold value, determining that the sub-band has strong broadband interference.
Optionally, the determining, according to the received uplink signal, the number of subbands affected by the strong interference in the radio frame includes:
measuring the signal strength indication of the received uplink signal on a sub-band without uplink scheduling;
and if the signal strength indication is larger than a second threshold value, determining that the sub-band has strong broadband interference.
Optionally, the generating scheduling information of the base station on the radio frame according to the distribution information of the radio frame with the strong broadband interference includes:
if the continuous number of wireless frames detect the strong broadband interference, controlling the base station to stop scheduling the corresponding number of wireless frames, and detecting the interference level of the wireless frames which are stopped to be scheduled;
and if the continuous number of wireless frames do not detect the strong broadband interference, controlling the base station to recover normal scheduling.
Optionally, the estimating, on the subband with uplink scheduling, a signal-to-interference-and-noise ratio of a received signal of the received uplink signal based on the reference signal includes:
on a sub-band with uplink scheduling, performing signal estimation by using the reference signal to obtain estimation information, wherein the reference signal represents a known signal transmitted to a base station by a transmitting end, and the estimation information comprises channel estimation, noise estimation and signal-to-noise ratio estimation;
and determining the signal-to-interference-and-noise ratio of the received signal based on the estimation information.
An interference processing system applied to a power wireless private network, the system comprising:
a first determining unit, configured to determine, in each radio frame, the number of subbands affected by strong interference in the radio frame according to a received uplink signal;
a second determining unit, configured to determine that a strong broadband interference exists in the radio frame if the number of the sub-bands is greater than a preset number threshold;
and the generating unit is used for generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference.
Optionally, the first determining unit includes:
an estimating subunit, configured to estimate, on a subband with uplink scheduling, a signal-to-interference-and-noise ratio of a received signal of the received uplink signal based on a reference signal;
and the first determining subunit is configured to determine that the sub-band has strong broadband interference if the sir is smaller than a preset first threshold.
Optionally, the first determining unit includes:
a measuring subunit, configured to measure, on a subband without uplink scheduling, a signal strength indicator of the received uplink signal;
and the second determining subunit determines that the sub-band has the strong broadband interference if the signal strength indication is greater than a second threshold value.
Optionally, the generating unit is specifically configured to:
if the continuous number of wireless frames detect the strong broadband interference, controlling the base station to stop scheduling the corresponding number of wireless frames, and detecting the interference level of the wireless frames which are stopped to be scheduled;
and if the continuous number of wireless frames do not detect the strong broadband interference, controlling the base station to recover normal scheduling.
Optionally, the estimating subunit is specifically configured to:
on a sub-band with uplink scheduling, performing signal estimation by using the reference signal to obtain estimation information, wherein the reference signal represents a known signal transmitted to a base station by a transmitting end, and the estimation information comprises channel estimation, noise estimation and signal-to-noise ratio estimation;
and determining the signal-to-interference-and-noise ratio of the received signal based on the estimation information.
Compared with the prior art, the invention provides an interference processing method and system applied to a power wireless private network, wherein in each wireless frame, the number of sub-bands influenced by strong interference in the wireless frame is determined according to a received uplink signal; if the number of the sub-bands is larger than a preset number threshold value, determining that the wireless frame has strong broadband interference; and generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference. According to the invention, the frame structure does not need to be modified, the base station can judge the existence of the interference based on the scheduling result, and then interference avoidance measures can be taken, so that the interference can be detected more timely to meet the actual requirement.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flowchart of an interference processing method applied to a power wireless private network according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an interference processing system applied to a power wireless private network according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The embodiment of the invention provides an interference processing method applied to a power wireless private network. The invention judges the existence of the broadband interference by adopting a mode of combining SINR (signal to interference plus noise ratio of received signals) and RSSI (received signal strength indication) based on the scheduling result of the base station. And judging the existence of the broadband interference according to the SINR when in scheduling, and judging the existence of the broadband interference according to the RSSI when in no scheduling.
For convenience of explaining an application scenario in the embodiment of the present invention, a related technology in a wireless private power network in the prior art will now be described.
Laa (license Assisted access) technology in 3GPP Release13 uses downlink carrier aggregation technology to aggregate licensed and unlicensed bands. The authorized frequency band is used as a main carrier unit and mainly transmits key information and services for ensuring QoS (quality of service); the unlicensed frequency band is used as an auxiliary carrier unit and is mainly used for increasing the data rate. This aggregation results in faster data efficiency, more sensitive responsiveness, and a better user experience.
Fair coexistence with Wi-Fi and other technologies operating in unlicensed bands is an important principle of LAA. In the unlicensed band, the availability of signals cannot be guaranteed at any time, so the LAA adopts an lbt (listenbefore talk) channel contention access mechanism. The method comprises the steps of monitoring a channel before transmitting data each time, performing CCA (ListenBeform talk) for idle channel assessment, and transmitting data under the condition of ensuring that the channel is idle, thereby ensuring the coexistence and fair competition of technologies such as LAA and Wi-Fi working on an unauthorized channel.
The LBT mechanism can be divided into a Frame-Based Equipment (FBE) channel detection mechanism and a Load-Based Equipment (LBE) channel detection mechanism according to different physical layer structures.
The FBE firstly determines a cycle detection period, CCA is carried out at the starting moment of each period, and the CCA detection time length is divided into one third of the symbol length. If the channel state is idle within the entire channel detection duration, the device may use the channel. Because there is a time delay between the device transmitting data and the channel detection, a blank period is set before each CCA detection. The device does not have any operation in the blank period and is in a standby state. The blank time length is set to enable the probability that the devices using different access modes compete to the channel to be higher. If the channel is in a busy state in the whole channel detection duration, the channel cannot be used in the period until the next period is used for performing the CCA detection again. The length of the FBE cycle detection period is the sum of the CCA detection time length, the channel occupation time length and the blank time length.
The LBE channel detection procedure is more complex than the FBE mechanism. The LBE mechanism is divided into two extreme Initial channel clear assessment (Initial CCA) and Extended channel clear assessment (Extended CCA), and specifically includes:
if the base station needs to transmit downlink data after the idle state, the base station will listen to the channel for a period of time, e.g., 34us, and may transmit data if it detects that the channel is idle.
After the data is transmitted for the first time, if no data needs to be transmitted again, the idle state is returned. Otherwise, a delay period, such as 34us, is generated, and after detecting that the channel is idle, the channel status detection is performed within a certain number, e.g., N, 9us time slots. If the busy channel is detected in any 9us time slot, the steps are repeated until the channel is detected to be idle in N9 us time slots, and data transmission can not be carried out, the size of a contention window [ X, Y ] can be adjusted based on HARQ-ACK information fed back by the UE or the evaluation of the base station, and q belongs to [ X, Y ], N belongs to [0, q-1 ].
Based on a terminal period measurement report value, for example, signal to Interference plus Noise ratio (SINR), (signal to Interference plus Noise ratio), the presence of wideband Interference is detected by comparing SINRs in the presence or absence of wideband Interference.
However, if the LBT-based channel status detection scheme is adopted, the underlying specifications of the wireless private network need to be modified, which is labor-intensive and cannot be applied to the deployed network. If the interference detection scheme based on the periodic reporting of the terminal is adopted, the terminal measurement report value cannot reflect the intermittent broadband interference in the electric power wireless private network due to long-term filtering.
In view of this, an embodiment of the present invention provides an interference processing method applied to an electronic wireless private network, and referring to fig. 1, the method may include the following steps:
s101, in each wireless frame, determining the number of sub-bands affected by strong interference in the wireless frame according to the received uplink signal.
The electric power wireless private network is a TDD system working at a 230-frequency band, and the broadband strong interference exists at the uplink and the downlink simultaneously, so that the base station can utilize the received uplink signal to carry out interference detection and simultaneously apply the detection result to the scheduling decision of the uplink and the downlink.
In each wireless frame, the base station determines the number K of sub-bands influenced by strong interference in the wireless frame according to the received uplink signals。
Estimating the signal-to-interference-and-noise ratio of a received signal of a received uplink signal based on a reference signal on a subband with uplink scheduling according to a scheduling result of a base station; and if the signal-to-interference-and-noise ratio is smaller than a preset first threshold value, determining that the sub-band has strong broadband interference.
Specifically, on the subband scheduled by the uplink, the base station estimates the SINR of the received signal based on the reference signal. And if the SINR is smaller than a first threshold value, the base station considers that strong interference exists on the sub-band.
Correspondingly, on the sub-band without uplink scheduling, measuring the signal strength indication of the received uplink signal, and if the signal strength indication is greater than the second threshold value, determining that the sub-band has the broadband strong interference.
Specifically, on a subband without uplink scheduling, the base station measures the RSSI (Received Signal Strength Indication, Signal to interference and noise ratio) of the Received Signal, and if the RSSI is greater than the second threshold, strong interference exists on the subband.
For uplink (signals are transmitted by the terminal, and signals are received by the base station), the terminal performs information interaction with the base station before transmitting signals, for example, the amount of data that the terminal needs to transmit, and the base station allocates resources (i.e., scheduling results) to the terminal, and the terminal performs signal transmission on the resources allocated by the base station.
Estimating a signal-to-interference-and-noise ratio of a received signal of a received uplink signal based on a reference signal, comprising:
on a sub-band with uplink scheduling, performing signal estimation by using the reference signal to obtain estimation information, wherein the reference signal represents a known signal transmitted to a base station by a transmitting end, and the estimation information comprises channel estimation, noise estimation and signal-to-noise ratio estimation;
and determining the signal-to-interference-and-noise ratio of the received signal based on the estimation information.
The reference signal is a known signal transmitted by a transmitting end, and a receiving end can use the known signal to perform channel estimation, noise estimation, signal-to-noise ratio estimation and the like.
The received signal contains a desired signal, an interfering signal, and noise. SINR is the signal to interference plus noise ratio of the received signal, i.e. desired signal power/(interference power + noise power); RSSI is a received signal strength indication and is the sum of the power of the desired signal + interference + noise.
S102, if the sub-band data is larger than a preset number threshold value, determining that the wireless frame has strong broadband interference;
s103, generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference.
If the number of strong interference sub-bands K in a radio framesIf the number of the radio frames is larger than a certain threshold (a preset number threshold), the radio frames are considered to have strong broadband interference. If the base station is in continuous NsAnd if the radio frames detect the broadband strong interference, the base station stops scheduling the M radio frames. Although scheduling is stopped in these M radio frames, interference level detection is still performed. This is because of the randomness of the interference, and it is likely that M radio frames have not passed and the interference does not exist, which needs to be detected.
If the base station is in continuous NwAnd if the wireless frame does not detect the broadband strong interference, the base station resumes the scheduling. Specifically, N is continuouswIf the radio frame does not detect the strong interference of the broadband, the channel condition is considered to be better, and the base station and the terminal can perform normal communication. The base station restarts the uplink/downlink scheduling, and the terminal receives the indication of the uplink/downlink scheduling, so that the terminal can transmit the indication on the resources corresponding to the uplink/downlink.
It should be noted that all threshold parameters in the embodiments of the present invention are configurable based on software, and the base station may perform adaptive adjustment according to the detected interference statistical characteristics. Specifically, the threshold parameter may be set according to the rule of random interference in the field environment. The configuration of the threshold parameters can be different due to different operation environments of the algorithm, so that threshold parameter software is required to be configured.
Node based base station scheduling in the embodiments of the present inventionAnd if the scheduling is available, judging the existence of the broadband interference according to the SINR, and if the scheduling is unavailable, judging the existence of the broadband interference according to the RSSI. If the base station is in continuous NsAnd if the radio frames detect the broadband strong interference, the base station stops scheduling the M radio frames. Although scheduling is stopped in these M radio frames, interference level detection is still performed. If the base station is in continuous NwAnd if the wireless frame does not detect the broadband strong interference, the base station restarts the scheduling. Specifically, based on the result of the base station scheduling, in a subframe with scheduling, if the SINR is lower than a certain threshold, it is considered that the interference plus noise ratio is large at this time, and strong interference exists. In the non-scheduled subframe, theoretically, no expected signal exists, the RSSI at this time is the sum of the powers of interference and noise, and the RSSI is very large, which indicates that the interference + the noise is very large, and strong interference exists. The SINR and RSSI threshold are used to control how strong the interference + noise is, and the base station stops scheduling, i.e. communication is suspended between the base station and the terminal.
Compared with the LBT scheme, the interference processing method applied to the power wireless private network provided by the embodiment of the invention does not need to modify the physical layer design of the prior art specification, such as a frame structure and the like. And the base station judges the existence of the broadband interference by adopting a mode of combining SINR and RSSI based on the scheduling result. In the interference detection scheme based on terminal measurement report, the terminal measurement report value is filtered for a long time and cannot timely reflect intermittent broadband interference. In the scheme, the base station can flexibly adopt various filtering or judging strategies according to the calculation or measurement result of the base station in each wireless frame to judge the existence of the broadband interference, and can effectively resist the intermittent broadband interference.
Referring to fig. 2, an embodiment of the present invention further provides an interference processing system applied to a power wireless private network, where the system includes:
a first determining unit 10, configured to determine, in each radio frame, the number of subbands affected by strong interference in the radio frame according to a received uplink signal;
a second determining unit 20, configured to determine that a strong broadband interference exists in the radio frame if the number of the sub-bands is greater than a preset number threshold;
a generating unit 30, configured to generate scheduling information of the radio frame by the base station according to the distribution information of the radio frame with the strong broadband interference.
On the basis of the above embodiment, the first determination unit includes:
an estimating subunit, configured to estimate, on a subband with uplink scheduling, a signal-to-interference-and-noise ratio of a received signal of the received uplink signal based on a reference signal;
and the first determining subunit is configured to determine that the sub-band has strong broadband interference if the sir is smaller than a preset first threshold.
On the basis of the above embodiment, the first determination unit includes:
a measuring subunit, configured to measure, on a subband without uplink scheduling, a signal strength indicator of the received uplink signal;
and the second determining subunit determines that the sub-band has the strong broadband interference if the signal strength indication is greater than a second threshold value.
On the basis of the foregoing embodiment, the generating unit is specifically configured to:
if the continuous number of wireless frames detect the strong broadband interference, controlling the base station to stop scheduling the corresponding number of wireless frames, and detecting the interference level of the wireless frames which are stopped to be scheduled;
and if the continuous number of wireless frames do not detect the strong broadband interference, controlling the base station to recover normal scheduling.
On the basis of the above embodiment, the estimating subunit is specifically configured to:
on a sub-band with uplink scheduling, performing signal estimation by using the reference signal to obtain estimation information, wherein the reference signal represents a known signal transmitted to a base station by a transmitting end, and the estimation information comprises channel estimation, noise estimation and signal-to-noise ratio estimation;
and determining the signal-to-interference-and-noise ratio of the received signal based on the estimation information.
The invention provides an interference processing system applied to a power wireless private network, wherein a first determining unit determines the number of sub-bands influenced by strong interference in each wireless frame according to a received uplink signal; the second determining unit is used for determining that the wireless frame has strong broadband interference if the number of the sub-bands is greater than a preset number threshold value; the generation unit generates scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference. According to the invention, the frame structure does not need to be modified, the base station can judge the existence of the interference based on the scheduling result, and then interference avoidance measures can be taken, so that the interference can be detected more timely to meet the actual requirement.
It should be noted that, for the working processes of each module, sub-module, and unit in this embodiment, please refer to the corresponding description in the above embodiments, which is not described herein again.
Optionally, an embodiment of the present invention further provides an interference processing apparatus applied to a power wireless private network, where the first determining unit, the second determining unit, and the generating unit are all stored in a memory as program units, and a processor executes the program units stored in the memory to implement corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, interference is processed at any time by adjusting kernel parameters, and interference detection and interference avoidance can be clearly known so as to ensure that the interference can be detected in time.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium having a program stored thereon, the program implementing an interference processing method applied to a power wireless private network when executed by a processor.
The embodiment of the invention provides a processor, which is used for running a program, wherein the program is used for executing the interference processing method applied to the electric power wireless private network when running.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps:
in each wireless frame, determining the number of sub-bands influenced by strong interference in the wireless frame according to the received uplink signal;
if the number of the sub-bands is larger than a preset number threshold value, determining that the wireless frame has strong broadband interference;
and generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference.
Optionally, the determining, according to the received uplink signal, the number of subbands affected by strong interference in the radio frame includes:
estimating the signal-to-interference-and-noise ratio of a received signal of a received uplink signal based on a reference signal on a subband with uplink scheduling;
and if the signal-to-interference-and-noise ratio is smaller than a preset first threshold value, determining that the sub-band has strong broadband interference.
Optionally, the determining, according to the received uplink signal, the number of subbands affected by the strong interference in the radio frame includes:
measuring the signal strength indication of the received uplink signal on a sub-band without uplink scheduling;
and if the signal strength indication is larger than a second threshold value, determining that the sub-band has strong broadband interference.
Optionally, the generating scheduling information of the base station on the radio frame according to the distribution information of the radio frame with the strong broadband interference includes:
if the continuous number of wireless frames detect the strong broadband interference, controlling the base station to stop scheduling the corresponding number of wireless frames, and detecting the interference level of the wireless frames which are stopped to be scheduled;
and if the continuous number of wireless frames do not detect the strong broadband interference, controlling the base station to recover normal scheduling.
Optionally, the estimating, on the subband with uplink scheduling, a signal-to-interference-and-noise ratio of a received signal of the received uplink signal based on the reference signal includes:
on a sub-band with uplink scheduling, performing signal estimation by using the reference signal to obtain estimation information, wherein the reference signal represents a known signal transmitted to a base station by a transmitting end, and the estimation information comprises channel estimation, noise estimation and signal-to-noise ratio estimation;
and determining the signal-to-interference-and-noise ratio of the received signal based on the estimation information.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, 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, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include transitory computer readable media (transmyedia) such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An interference processing method applied to a power wireless private network is characterized by comprising the following steps:
in each wireless frame, determining the number of sub-bands influenced by strong interference in the wireless frame according to the received uplink signal;
if the number of the sub-bands is larger than a preset number threshold value, determining that the wireless frame has strong broadband interference;
and generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference.
2. The method of claim 1, wherein the determining the number of subbands affected by strong interference in the radio frame according to the received uplink signal comprises:
estimating the signal-to-interference-and-noise ratio of a received signal of a received uplink signal based on a reference signal on a subband with uplink scheduling;
and if the signal-to-interference-and-noise ratio is smaller than a preset first threshold value, determining that the sub-band has strong broadband interference.
3. The method of claim 1, wherein the determining the number of subbands affected by strong interference in the radio frame according to the received uplink signal comprises:
measuring the signal strength indication of the received uplink signal on a sub-band without uplink scheduling;
and if the signal strength indication is larger than a second threshold value, determining that the sub-band has strong broadband interference.
4. The method of claim 1, wherein the generating scheduling information of radio frames by a base station according to distribution information of radio frames in which the wideband strong interference exists comprises:
if the continuous number of wireless frames detect the strong broadband interference, controlling the base station to stop scheduling the corresponding number of wireless frames, and detecting the interference level of the wireless frames which are stopped to be scheduled;
and if the continuous number of wireless frames do not detect the strong broadband interference, controlling the base station to recover normal scheduling.
5. The method according to claim 2, wherein estimating the signal-to-interference-and-noise ratio of the received signal of the received uplink signal based on the reference signal on the subband with uplink scheduling comprises:
on a sub-band with uplink scheduling, performing signal estimation by using the reference signal to obtain estimation information, wherein the reference signal represents a known signal transmitted to a base station by a transmitting end, and the estimation information comprises channel estimation, noise estimation and signal-to-noise ratio estimation;
and determining the signal-to-interference-and-noise ratio of the received signal based on the estimation information.
6. An interference processing system applied to a power wireless private network, the system comprising:
a first determining unit, configured to determine, in each radio frame, the number of subbands affected by strong interference in the radio frame according to a received uplink signal;
a second determining unit, configured to determine that a strong broadband interference exists in the radio frame if the number of the sub-bands is greater than a preset number threshold;
and the generating unit is used for generating scheduling information of the base station to the wireless frame according to the distribution information of the wireless frame with the broadband strong interference.
7. The system according to claim 6, wherein the first determination unit comprises:
an estimating subunit, configured to estimate, on a subband with uplink scheduling, a signal-to-interference-and-noise ratio of a received signal of the received uplink signal based on a reference signal;
and the first determining subunit is configured to determine that the sub-band has strong broadband interference if the sir is smaller than a preset first threshold.
8. The system according to claim 6, wherein the first determination unit comprises:
a measuring subunit, configured to measure, on a subband without uplink scheduling, a signal strength indicator of the received uplink signal;
and the second determining subunit determines that the sub-band has the strong broadband interference if the signal strength indication is greater than a second threshold value.
9. The system according to claim 6, wherein the generating unit is specifically configured to:
if the continuous number of wireless frames detect the strong broadband interference, controlling the base station to stop scheduling the corresponding number of wireless frames, and detecting the interference level of the wireless frames which are stopped to be scheduled;
and if the continuous number of wireless frames do not detect the strong broadband interference, controlling the base station to recover normal scheduling.
10. The system according to claim 7, wherein the estimation subunit is specifically configured to:
on a sub-band with uplink scheduling, performing signal estimation by using the reference signal to obtain estimation information, wherein the reference signal represents a known signal transmitted to a base station by a transmitting end, and the estimation information comprises channel estimation, noise estimation and signal-to-noise ratio estimation;
and determining the signal-to-interference-and-noise ratio of the received signal based on the estimation information.
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| JP3836688B2 (en) * | 2001-05-25 | 2006-10-25 | 株式会社エヌ・ティ・ティ・ドコモ | Radio link interference detection method and interference prevention system |
| US8488724B2 (en) * | 2009-05-14 | 2013-07-16 | Silvus Technologies, Inc. | Wideband interference mitigation for devices with multiple receivers |
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| CN102255833A (en) * | 2010-05-20 | 2011-11-23 | 中兴通讯股份有限公司 | Analysis method and apparatus for uplink broadband interference |
| CN104052700A (en) * | 2014-05-27 | 2014-09-17 | 北京创毅视讯科技有限公司 | LTE system anti-interference method and device |
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