CN111800793A - Interference optimization method and device - Google Patents
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Abstract
The embodiment of the invention provides an interference optimization method and device, which are applied to a fifth generation mobile communication 5G system of non-independent networking, and the method comprises the following steps: acquiring an interference frequency band under the condition that communication interference exists between a new air interface wireless access technology NR system and a long term evolution LTE system in a 5G system, wherein the interference frequency band comprises a harmonic interference frequency band between the NR system and the LTE system and/or an intermodulation interference frequency band between the NR system and the LTE system; and limiting the physical resource block corresponding to the interference frequency band under the NR system. And further, interference is avoided, adverse effects of the interference on a communication system are solved, the receiving sensitivity of the communication system is improved, and the service performance of the system is further improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an interference optimization method and apparatus.
Background
Since a 5G (5th Generation Mobile Networks, fifth Generation Mobile communication system) user equipment to be used for business supports multiple systems such as an LTE (Long Term Evolution) system, an NR (New Radio, New air interface wireless access technology) system, and the like, under a scenario in which an LTE and an NR transmit-receive link work simultaneously, there is mutual interference between multiple frequency bands.
For example, in the existing network LTE 1.8G band and 3.5G band NR NSA (Non _ standard alone) networking, the networking mainly has the influence of uplink 2-order harmonic interference of LTE band3 (uplink 1710-. According to standard evaluation, full bandwidth full power transmission B3 will back off the receive sensitivity by 25.9db for NR interference and 18.9db for NR to B3 interference, which has a severe impact on traffic performance in the communication network system.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide an interference optimization method, which solves the above problems in the prior art.
Correspondingly, the embodiment of the invention also provides an interference optimization device.
In order to solve the above problem, an embodiment of the present invention discloses an interference optimization method, which is applied to a fifth generation mobile communication 5G system of a non-independent network, and the method includes:
acquiring an interference frequency band under the condition that communication interference exists between a new air interface radio access technology (NR) system and a Long Term Evolution (LTE) system in the 5G system, wherein the interference frequency band comprises a harmonic interference frequency band between the NR system and the LTE system and/or an intermodulation interference frequency band between the NR system and the LTE system;
and limiting the use of the physical resource block corresponding to the interference frequency band under the NR mode.
Correspondingly, the embodiment of the invention also discloses an interference optimization device, which is applied to a fifth generation mobile communication 5G system of non-independent networking, and comprises the following components:
a frequency band obtaining module, configured to obtain an interference frequency band when communication interference exists between a new air interface radio access technology NR standard and a long term evolution LTE standard in the 5G system, where the interference frequency band includes a harmonic interference frequency band between the NR standard and the LTE standard and/or an intermodulation interference frequency band between the NR standard and the LTE standard;
and the frequency band limiting module is used for limiting the use of the physical resource block corresponding to the interference frequency band under the NR mode.
The embodiment of the present invention further provides a non-volatile readable storage medium, where one or more modules are stored in the storage medium, and when the one or more modules are applied to a terminal device, the terminal device may execute instructions of each step in the interference optimization method provided by the present invention.
The embodiment of the present invention further provides an interference optimization apparatus, which includes a processor and a memory, wherein,
the processor executes the computer program code stored in the memory to implement the interference optimization method of the present invention.
The embodiment of the invention has the following advantages:
acquiring an interference frequency band under the condition that communication interference exists between a new air interface radio access technology (NR) system and a Long Term Evolution (LTE) system in the 5G system, wherein the interference frequency band comprises a harmonic interference frequency band between the NR system and the LTE system and/or an intermodulation interference frequency band between the NR system and the LTE system; and limiting the use of the physical resource block corresponding to the interference frequency band under the NR mode. And further, interference is avoided, adverse effects of the interference on a communication system are solved, and the service performance of the system is further improved.
Drawings
Fig. 1 is a flow chart of the steps of an interference optimization method embodiment of the present invention;
FIG. 2 is a schematic diagram of one type of harmonic interference and intermodulation interference of the present invention;
fig. 3 is a flow chart of steps of an alternative embodiment of a method of interference optimization of the present invention;
fig. 4 is a flow chart illustrating steps of an alternative embodiment of a method for optimizing interference in accordance with the present invention;
fig. 5 is a flowchart illustrating the steps of an embodiment of a method for optimizing interference according to the present invention;
fig. 6 is a flowchart illustrating the steps of an embodiment of a method for optimizing interference according to the present invention;
fig. 7 is a flowchart illustrating the steps of an embodiment of a method for optimizing interference according to the present invention;
fig. 8 is a block diagram of an interference optimization apparatus according to an embodiment of the present invention;
fig. 9 is a block diagram of another interference optimization apparatus according to another embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Before the embodiment of the invention is introduced, the concept background of the invention is introduced, at present, a frequency band of 3.3GHz-4.2GHz is a frequency band of 5G network deployment, and signals causing serious interference to the frequency band are mainly second harmonic/third harmonic, second order intermodulation/third order intermodulation and the like generated by a low-frequency signal 1.8G frequency band. If the communication terminal supports both LTE (fourth generation mobile communication network, 4G network) and NR (5G network) systems, the antenna architecture can be divided into two architectures, i.e., LTE and 5G common antennas and independent antennas, but both of these two antenna architectures will have serious impact on the service performance of the communication system due to harmonic interference and intermodulation interference. When LTE and 5G adopt a common antenna architecture, the second harmonic is loaded to an input port of an LNA (Low noise amplifier), which raises the bottom noise of a terminal and causes a corresponding back-off of sensitivity. Illustratively, when the working bandwidth is 5MHz, the sensitivity of the main and auxiliary receiving links is backed off by 22.5dB after maximum ratio combination. When the bandwidth is 20MHz, the sensitivity of the main and auxiliary receiving links is backed off by 16.5dB after maximum ratio combination. When the LTE system and the NR system adopt independent antenna design, harmonic waves output by B3PA enter an auxiliary receiving channel through antenna coupling, harmonic interference is caused, and when the working bandwidth is 5MHz, the sensitivity of a main antenna and an auxiliary antenna is backed off by 21.8dB through maximum ratio combination. And when the bandwidth is 20MHz, the sensitivity of the main antenna and the auxiliary antenna is backed by 15.8dB through maximum ratio combination. Therefore, the sensitivity of the B3 second harmonic to 3.5GHz brings a large back-off, both in the co-antenna architecture and in the independent antenna architecture.
In addition, intermodulation interference is another main factor causing sensitivity back-off of the terminal. The theoretical calculation of the second-order intermodulation interference falling into the main and auxiliary receiving channels of B3 will cause the sensitivity of the whole machine to be about 29dB back compared with the sensitivity of a single frequency band.
Referring to fig. 1, a flowchart illustrating steps of an embodiment of an interference optimization method according to the present invention is shown, and is applied to a fifth generation mobile communication 5G system in a non-independent networking, and specifically may include the following steps:
The interference frequency band comprises a harmonic interference frequency band between an NR system and a TE system and/or an intermodulation interference frequency band between the NR system and the LTE system.
In a specific application, harmonic interference means that when the input signal is a single-tone signal f1, the output signal will contain high-order harmonic components such as 2f1, 3f1, etc. Harmonic interference is caused if the harmonic falls into another reception band. The intermodulation interference refers to the intermodulation of each order of frequency components when the input signal contains these frequency components, i.e. taking the input two frequency components f1 and f2 as an example, the output will contain the second order intermodulation (f1 ± f2), the third order intermodulation (2f1 ± f2, f1 ± 2f2), etc. Intermodulation interference may be caused if intermodulation products fall into the receiving band. The interference mostly occurs in a high-frequency and low-frequency simultaneous transmission scene, and an external signal is poured into a UE (user equipment) transmission link scene, for example, an LTE voice signal and a 5G data signal are concurrent, and an LTE signaling signal and a 5G data signal are concurrent. The second-order distortion amplitude in the intermodulation distortion is the largest, the higher the order is, the smaller the distortion amplitude is, and generally, the influence brought by the smaller intermodulation distortion amplitude above the third order under most scenes can be ignored.
For example, in 5G NSA, harmonic interference and intermodulation interference exist between LTE and NR Frequency bands of FDD (Frequency Division duplex) NSA, and taking the current network B31.8G Frequency band as an example (1.8G uplink Frequency range is 1735-1765MHz, and downlink Frequency range is 1830-1860MHz), the harmonic interference and intermodulation interference are specifically shown in fig. 2. That is, under the condition that the current network frequency band is 1735-1765MHz, the corresponding second harmonic interference frequency band is 3470-3530MHz, and the second-order intermodulation interference frequency band is 1735-1865 MHz. That is to say, for LTE 1.8G and NR 3.5G NSA networking, there are mainly the influence of LTE B3 uplink 2-th harmonic interference on reception of NR n78 downlink and the influence of intermodulation interference generated by LTE B3 uplink and NR n78 uplink simultaneous transmission on LTE n78 downlink reception.
Therefore, the corresponding harmonic interference frequency band and/or intermodulation interference frequency band is obtained according to the above manner, and the following steps are performed corresponding to each interference frequency band.
And 102, limiting the use of the physical resource block corresponding to the interference frequency band under the NR mode.
For example, for FDD1.8G, for example, when the uplink actual corresponding frequency band is 1735-. If the frequency of 3.5G is 3500-3600MHz, the secondary harmonic interference frequency band to be limited to be used is 3500-3520MHz which is 20M (PRB), the second-order intermodulation interference frequency band is 3565-3600MHz which is 35M (PRB), 80M (PRB) available resources are left in the downlink, and 65M (PRB) available resources are left in the uplink.
In a specific implementation, when a Downlink needs to perform scheduling restriction on a Downlink PDSCH (Physical Downlink Shared Channel) Channel, a PDCCH (Physical Downlink control Channel) Channel may be restricted from configuration; when the uplink needs to limit the uplink PUSCH (Physical uplink Shared Channel) Channel scheduling, the PRACH (Physical Random Access Channel) Channel may be limited in configuration.
It should be noted that, since a traffic channel occupies many PRBs (Physical Resource blocks) during communication, PRB restriction is generally performed mainly for the traffic channel. However, the number of PRBs occupied by an Uplink PUCCH (Physical Uplink Control Channel) as a Control Channel is small, and for example, when the PUCCH occupies 1 PRB, only 2 PRBs on the LTE downlink side are affected, so that it is preferable to consider no limitation on scheduling of the PUCCH Channel to optimize the communication quality of the communication system.
In summary, the interference optimization method according to the present invention obtains an interference frequency band under a condition that communication interference exists between a new air interface radio access technology NR standard and a long term evolution LTE standard in a system, where the interference frequency band includes a harmonic interference frequency band between the NR standard and the LTE standard and/or an intermodulation interference frequency band between the NR standard and the LTE standard; and limiting the physical resource block corresponding to the interference frequency band under the NR system. And further, interference is avoided, adverse effects of the interference on a communication system are solved, the receiving sensitivity of the communication system is improved, and the service performance of the system is further improved.
Referring to fig. 3, which shows a flowchart of steps of an alternative embodiment of the interference optimization method of the present invention, after step 102, the method may further include the following steps:
and 103, dynamically adjusting the physical resource blocks used in the LTE system and the physical resource blocks used in the NR system.
In a specific application, after the interference is optimized by the method of directly limiting the interference frequency band shown in the embodiment of fig. 1, communication interference which is not optimized still exists in the communication system, so that the method of dynamically coordinating resources can be continuously adopted to optimize harmonic interference or intermodulation interference. Illustratively, the frequency bands used in the LTE system and the NR system are jointly scheduled at the same time, that is, PRBs used in the LTE system and the NR system are dynamically restricted, and a terminal interference harmonic relationship is also considered during scheduling, so that PRBs that may be interfered or interfered are dynamically avoided, that is, not only PRBs that may be interfered or interfered in the NR system are restricted, but also PRBs that may be interfered or interfered in the LTE system are restricted. And eliminating conflicts existing in other resource scheduling applications by adopting a preset algorithm to determine interference harmonics and carrying out corresponding optimization.
Referring to fig. 4, which shows a flowchart of steps of an alternative embodiment of the interference optimization method of the present invention, after step 103, the method may further include the following steps:
and step 104, setting the LTE system as an uplink single-shot mode under the condition that the interference frequency band comprises an intermodulation interference frequency band between the NR system and the LTE system.
And 105, controlling the base station to send the reconfiguration message with the preset field to the user equipment.
And 106, controlling the uplink time slot corresponding to the first target uplink subframe not to transmit data under the condition of using the NR mode.
And 107, under the condition of using the LTE system, controlling the second target uplink subframe to transmit uplink data and hybrid automatic repeat request feedback.
And the first target uplink subframe and the second target uplink subframe are determined according to a preset field.
In specific application, when intermodulation interference exists in a communication network, according to an LTE communication protocol, an LTE system is configured to be an uplink single-transmission mode, so that two carriers of an NR system and the LTE system transmit uplink data in a time division mode. Under NSA, a 4G network of an LTE system opens network communication through signaling, and then a 5G network of an NR system is utilized for service data transmission, that is, when a base station opens an uplink single-transmission mode of the LTE system to avoid intermodulation interference, the base station carries a tdm-Pattern config-r15 field (namely, a target field) in a reconfiguration message to a terminal, and further when the communication system uses the NR system, data is not transmitted in an uplink time slot corresponding to a first target uplink subframe; and when the communication system uses the LTE scheme, sending uplink data and HARQ (Hybrid Automatic Repeat request) feedback on the configured second target uplink subframe, thereby avoiding sending uplink data simultaneously with using the NR scheme, and avoiding inter-system intermodulation interference.
Referring to fig. 5, a flowchart illustrating steps of an embodiment of an interference optimization method according to the present invention is shown, and particularly after step 107, the method may further include the following steps:
and 108, judging whether the communication interference comprises harmonic interference between the NR system and the LTE system and/or intermodulation interference between the NR system and the LTE system.
And step 109, limiting the use of the downlink physical resource block corresponding to the harmonic interference under the NR mode under the condition of including the harmonic interference.
And step 110, under the condition of including intermodulation interference, limiting the use of the uplink physical resource block corresponding to the intermodulation interference under an NR mode.
For example, after the interference optimization operation is performed through the above steps, the communication quality requirement for the 5G communication system is still not met, for example, under the condition that harmonic interference and/or intermodulation interference still exists, the non-schedulable uplink and downlink PRB resources may be limited according to the user level through the scheduling information of the X2 interface interaction user level between the NR system and the LTE system, so as to avoid interference, fully utilize the cell gap resource, and ensure the cell level throughput. According to the communication protocol, Resource Coordination Information (Resource Coordination Information) of a base station (MeNB) carried by an X2 message during the addition of an NSA SCG (secondary cell Group) and the SCG update process may transfer respective scheduling Information between an MCG and an SCG cell, and may transfer scheduling Information of 110 PRBs for 40ms continuously at most.
In a specific application, the NR system used in the 5G communication system avoids second harmonic interference using the LTE system by limiting scheduling of interfered downlink PRBs, and avoids intermodulation interference when the NR system is used by limiting uplink PRBs that may interfere with LTE. For a single EN-DC (E represents E-UTRA (Evolved-UMTS Terrestrial Radio Access), namely a 4G Radio Access network, N represents NR, namely 5G new Radio, DC represents Dual Connectivity, and EN-DC represents Dual connection of the 4G Radio Access network and the 5G NR) terminal (user equipment), the scheduling queuing algorithm of an LTE system and an NR system is not changed. For example, the REQUEST may be an attach REQUEST (SGNB ADDITION REQUEST) or a modify REQUEST (SGNB)
MCG (Master Cell Group ) in MODIFICATION REQUEST) informs SCG of PRB using UE of LTE system, predicts PRB using condition of future short time (ms millisecond level) in an average or smooth mode according to historical scheduling information, and further calculates uplink PRB and/or downlink PRB which are possibly interfered when NR system is used according to uplink PRB (frequency domain resource) and downlink PRB used in the predicted LTE system, thereby restricting scheduling of these PRBs, namely avoiding using the PRBs in the communication process.
Referring to fig. 6, which is a flowchart illustrating specific steps of an embodiment of an interference optimization method according to the present invention, where the step 109 includes harmonic interference, and the limiting of using the corresponding downlink physical resource block under the NR standard may include the following steps:
For example, the harmonic calculation formula may be used to calculate the harmonic frequency band, and includes:
wherein y represents a harmonic frequency band, and f1 represents any frequency point of an uplink frequency band used in an LTE system; FLOOR (x) denotes rounding down x.
Illustratively, frequency points in an uplink frequency band used in the LTE system are traversed, a harmonic frequency band is sequentially determined, and then the harmonic frequency band is compared with a frequency band used in the NR system, for example, the harmonic frequency band is 3980M to 3450M, the frequency band used in the NR system is 3400M to 3500M, and an overlapping interval is 3400M to 3450M, that is, the frequency band is used as a downlink physical resource block.
Illustratively, according to the downlink physical resource blocks determined in step 1092, that is, when the NR scheme is used for downlink communication, physical resource blocks using 3400M-3450M are avoided, so as to optimize the harmonic interference.
Referring to fig. 7, which is a flowchart illustrating specific steps of an embodiment of an interference optimization method according to the present invention, where in step 110, under a condition that intermodulation interference is included, limiting the use of a corresponding uplink physical resource block under an NR standard may include the following steps:
Wherein the intermodulation interference conditions include:
f3down≤f2-f1≤f3up,
wherein [ f3down, f3up ] represents a downlink frequency band used in the LTE system, f1 represents any frequency point in an uplink frequency band used in the LTE system, and f2 represents an uplink physical resource block.
Illustratively, by using the downlink frequency band used in the LTE system, each frequency point in the uplink frequency band used in the LTE system is traversed to obtain a frequency band satisfying the intermodulation interference condition, and the frequency band is further used as f2, that is, an uplink physical resource block that is limited by the NR system, that is, the following steps are performed.
In addition, it should be noted that, the technical solution according to the present invention is applied to a scenario of optimizing the application of turning on the harmonic interference or the intermodulation interference, and the steps described in the embodiments of fig. 1, fig. 3, fig. 4, and fig. 5 may be implemented as independent optimization functions respectively. For example, the communication system may be turned on and off according to actual application requirements of the communication system, a corresponding switch is set for each corresponding function (fig. 1, 3, 4, and 5), and when a certain function needs to be turned on, the switch corresponding to the function is turned on correspondingly; otherwise, the corresponding switch may be turned off to turn off the function. That is, the communication system may determine whether to execute the steps shown in fig. 1, fig. 3, fig. 4, and fig. 5, respectively, according to actual application requirements, and the steps shown in fig. 1, fig. 3, fig. 4, and fig. 5 may be executed separately, so as to optimize the system interference independently, or may be executed in combination. Further, the condition for turning on the steps shown in fig. 1, 3, 4, and 5 may be determined based on quality requirements in the 5G communication system. For example, it may be turned on in case the degree of intermodulation interference and/or harmonic interference reaches a certain threshold; or as long as intermodulation interference and/or harmonic interference is present, the present invention is not particularly limited. By combining the functions, the harmonic interference and/or the intermodulation interference existing in the communication system can be comprehensively optimized under different scenes, and the system performance is improved.
Referring to fig. 8, a block diagram of an embodiment of an interference optimization apparatus of the present invention is shown, and is applied to a fifth generation mobile communication 5G system of a non-independent network, and specifically includes the following modules:
the frequency band obtaining module 810 is configured to obtain an interference frequency band in the case that communication interference exists between a new air interface radio access technology NR system and a long term evolution LTE system in the 5G system, where the interference frequency band includes a harmonic interference frequency band between the NR system and the LTE system and/or an intermodulation interference frequency band between the NR system and the LTE system.
And a frequency band limiting module 820, configured to limit, in an NR system, a physical resource block corresponding to an interference frequency band.
In an alternative embodiment of the present invention, on the basis of fig. 8, the apparatus 800 further includes the following modules, as shown in fig. 9:
the dynamic control module 830 is configured to dynamically adjust the physical resource blocks used in the LTE scheme and the physical resource blocks used in the NR scheme after the step of limiting the use of the physical resource blocks corresponding to the interference frequency band in the NR scheme.
Optionally, the mode setting module 840 is configured to set the LTE scheme to the uplink single-transmission mode when the interference frequency band includes an intermodulation interference frequency band between the NR scheme and the LTE scheme after the step of dynamically adjusting the physical resource blocks used in the LTE scheme and the physical resource blocks used in the NR scheme.
A message sending module 850, configured to control the base station to send a reconfiguration message with a preset field to the user equipment;
and a control module 860, configured to control, when the NR standard is used, that no data is sent on the uplink timeslot corresponding to the first target uplink subframe.
The control module 860 is further configured to control the second target uplink subframe to transmit uplink data and harq feedback when the LTE scheme is used.
And the first target uplink subframe and the second target uplink subframe are determined according to a preset field.
Optionally, the interference determining module 870 is configured to determine whether the communication interference includes a harmonic interference between the NR system and the LTE system and/or an intermodulation interference between the NR system and the LTE system after the step of limiting, under the NR system, the use of the physical resource block corresponding to the interference frequency band.
A harmonic limiting module 880, configured to limit, in a case where the harmonic interference is included, the downlink physical resource block corresponding to the harmonic interference in the NR standard to be used.
And the intermodulation limiting module 890 is configured to, under the condition that intermodulation interference is included, limit the uplink physical resource block corresponding to the intermodulation interference in the NR system.
Optionally, the harmonic limiting module 880 includes:
and a frequency band calculating submodule 881, configured to calculate a harmonic uplink frequency band according to an uplink frequency band used in an LTE system.
And the resource block determination submodule 882 is configured to use a coincidence interval between the harmonic frequency band and the frequency band used in the NR standard as a downlink physical resource block.
And a communication scheduling submodule 883, configured to restrict the use of the downlink physical resource block for downlink communication under the NR standard.
Optionally, the intermodulation limiting module 890 comprises:
and the frequency point traversal submodule 891 is configured to use, according to a downlink frequency band and an uplink frequency band used in the LTE system, a frequency band that meets an intermodulation interference condition as an uplink physical resource block.
A communication scheduling submodule 892, configured to restrict use of an uplink physical resource block for uplink communication under the NR standard.
The intermodulation interference conditions include:
f3down≤f2-f1≤f3up,
wherein [ f3down, f3up ] represents a downlink frequency band used in the LTE system, f1 represents any frequency point in an uplink frequency band used in the LTE system, and f2 represents an uplink physical resource block.
The embodiment of the present invention further provides a non-volatile readable storage medium, where one or more modules (programs) are stored in the storage medium, and when the one or more modules are applied to a terminal device, the one or more modules may cause the terminal device to execute instructions (instructions) of method steps in the embodiment of the present invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention 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.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. 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 terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, 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 terminal 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 terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. An interference optimization method applied to a fifth generation mobile communication 5G system of non-independent networking, the method comprising:
acquiring an interference frequency band under the condition that communication interference exists between a new air interface radio access technology (NR) system and a Long Term Evolution (LTE) system in the 5G system, wherein the interference frequency band comprises a harmonic interference frequency band between the NR system and the LTE system and/or an intermodulation interference frequency band between the NR system and the LTE system;
and limiting the use of the physical resource block corresponding to the interference frequency band under the NR mode.
2. The method according to claim 1, wherein after the step of restricting the use of the physical resource blocks corresponding to the interference frequency band under the NR standard, the method further comprises:
and dynamically adjusting the physical resource blocks used in the LTE system and the physical resource blocks used in the NR system.
3. The method of claim 2, wherein after the step of dynamically adjusting the physical resource blocks used in the LTE scheme and the physical resource blocks used in the NR scheme, the method further comprises:
setting the LTE system as an uplink single-shot mode under the condition that the interference frequency band comprises an intermodulation interference frequency band between the NR system and the LTE system;
the control base station sends a reconfiguration message with a preset field to the user equipment;
under the condition of using the NR system, controlling the uplink time slot corresponding to the first target uplink subframe not to send data; and
under the condition of using the LTE system, controlling a second target uplink subframe to send uplink data and hybrid automatic repeat request feedback;
wherein the first target uplink subframe and the second target uplink subframe are determined according to the preset field.
4. The method as claimed in claim 3, wherein after the step of dynamically adjusting the physical resource blocks used in the LTE scheme and the physical resource blocks used in the NR scheme, the method further comprises:
judging whether the communication interference comprises harmonic interference between the NR standard and the LTE standard and/or intermodulation interference between the NR standard and the LTE standard;
under the condition of including the harmonic interference, limiting the use of a downlink physical resource block corresponding to the harmonic interference under the NR mode;
and under the condition of including the intermodulation interference, limiting the use of an uplink physical resource block corresponding to the intermodulation interference under the NR mode.
5. The method according to claim 4, wherein the limiting, in the NR metric, the use of the downlink physical resource block corresponding to the harmonic interference includes:
determining a harmonic frequency band according to an uplink frequency band used in the LTE system;
taking a superposition interval between the harmonic frequency band and the frequency band used in the NR mode as the downlink physical resource block;
and limiting the downlink physical resource block to be used for downlink communication under the NR mode.
6. The method of claim 4, wherein the restricting, in the presence of the intermodulation interference, use of an uplink physical resource block corresponding to the intermodulation interference in the NR format comprises:
according to the downlink frequency band and the downlink frequency band used in the LTE system, the frequency band meeting the intermodulation interference condition is used as the uplink physical resource block;
limiting the use of the uplink physical resource block for uplink communication under the NR mode;
the intermodulation interference conditions include:
f3down≤f2-f1≤f3up,
wherein [ f3down, f3up ] represents a downlink frequency band used in the LTE scheme, f1 represents any frequency point in the downlink frequency band used in the LTE scheme, and f2 represents the uplink physical resource block.
7. An apparatus for optimizing interference, applied to a fifth generation mobile communication 5G system for non-independent networking, the apparatus comprising:
a frequency band obtaining module, configured to obtain an interference frequency band when communication interference exists between a new air interface radio access technology NR standard and a long term evolution LTE standard in the 5G system, where the interference frequency band includes a harmonic interference frequency band between the NR standard and the LTE standard and/or an intermodulation interference frequency band between the NR standard and the LTE standard;
and the frequency band limiting module is used for limiting the use of the physical resource block corresponding to the interference frequency band under the NR mode.
8. The apparatus of claim 7, further comprising:
and the dynamic control module is used for dynamically adjusting the physical resource blocks used in the LTE system and the physical resource blocks used in the NR system after the step of limiting the use of the physical resource blocks corresponding to the interference frequency band under the NR system.
9. The apparatus of claim 8, further comprising:
a mode setting module, configured to set the LTE scheme to an uplink single-transmission mode when the interference frequency band includes an intermodulation interference frequency band between the NR scheme and the LTE scheme after the step of dynamically adjusting the physical resource blocks used in the LTE scheme and the physical resource blocks used in the NR scheme;
the message sending module is used for controlling the base station to send the reconfiguration message with the preset field to the user equipment;
the control module is used for controlling the uplink time slot corresponding to the first target uplink subframe not to send data under the condition of using the NR mode; and
the control module is further configured to control the second target uplink subframe to send uplink data and hybrid automatic repeat request feedback under the condition that the LTE standard is used;
wherein the first target uplink subframe and the second target uplink subframe are determined according to the preset field.
10. The apparatus of claim 9, further comprising:
an interference determining module, configured to determine, after the step of dynamically adjusting the physical resource blocks used in the LTE system and the physical resource blocks used in the NR system, whether the communication interference includes harmonic interference between the NR system and the LTE system and/or intermodulation interference between the NR system and the LTE system;
a harmonic limiting module, configured to limit, in the NR standard, use of a downlink physical resource block corresponding to the harmonic interference;
and the intermodulation limiting module is used for limiting the use of the uplink physical resource block corresponding to the intermodulation interference under the NR mode under the condition that the intermodulation interference is included.
11. The apparatus of claim 10, wherein the harmonic limiting module comprises:
the frequency band calculation submodule is used for calculating a harmonic uplink frequency band according to the uplink frequency band used in the LTE system;
a resource block determination submodule, configured to use a coincidence interval between the harmonic frequency band and the frequency band used in the NR standard as the downlink physical resource block;
and the communication scheduling submodule is used for limiting the downlink physical resource block to be used for downlink communication under the NR mode.
12. The apparatus of claim 10, wherein the intermodulation limiting module comprises:
a frequency point traversal submodule, configured to use, according to a downlink frequency band and an uplink frequency band used in the LTE system, a frequency band that meets an intermodulation interference condition as the uplink physical resource block;
a communication scheduling submodule, configured to restrict use of the uplink physical resource block for uplink communication under the NR standard;
the intermodulation interference conditions include:
f3down≤f2-f1≤f3up,
wherein [ f3down, f3up ] represents a downlink frequency band used in the LTE system, f1 represents any frequency point in an uplink frequency band used in the LTE system, and f2 represents the uplink physical resource block.
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