CN110971379B - Remote interference management method and network side equipment - Google Patents
Remote interference management method and network side equipment Download PDFInfo
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- CN110971379B CN110971379B CN201811333334.5A CN201811333334A CN110971379B CN 110971379 B CN110971379 B CN 110971379B CN 201811333334 A CN201811333334 A CN 201811333334A CN 110971379 B CN110971379 B CN 110971379B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
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- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a remote interference management method and network side equipment, wherein the method comprises the following steps: when the interfered party is determined to be subjected to remote interference, continuously transmitting a first reference signal, and starting reference signal monitoring; when a second reference signal sent by an interference party is monitored, the interference party is confirmed to be remotely interfered by the interference party, and the interference party starts reference signal monitoring; when a first reference signal sent by an interfered party is received, determining that remote interference is caused to the interfered party, and continuously transmitting a second reference signal; the sequences of the first reference signal and the second reference signal are not the same. The invention provides a design scheme of double reference signals aiming at double reference signal remote interference management, and improves the flexibility of reference signal design.
Description
The present application claims priority of chinese patent application having application number 201811141588.7 entitled "a remote interference management method" filed in 2018, 9, month 28, the entire contents of which are incorporated herein by reference.
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a remote interference management method and a network device.
Background
Under certain weather conditions, electromagnetic waves propagating in the atmosphere, and in particular in the troposphere, are affected by atmospheric refraction, and their propagation trajectory will bend to the ground. Wherein part of the electromagnetic wave is trapped in a thin atmosphere with a certain thickness, and propagates in a similar way to the electromagnetic wave in a metal waveguide. This phenomenon is known as the propagation of electromagnetic waves through atmospheric waveguides (also known as tropospheric waveguides).
The atmospheric waveguiding phenomenon causes signals transmitted by the 5G base station gNB to propagate hundreds of kilometers away with little path loss, thereby causing interference to the remote gNB.
In TD-LTE (Time Division Long Term Evolution), due to the existence of the atmospheric waveguide phenomenon, a wireless signal of a synchronous remote 4G base station eNB having the same TDD (Time Division duplex) configuration may cause non-negligible interference, i.e., remote interference, to a local eNB.
Despite many differences between 5G NR (New Radio) and TD-LTE, most deployments of NR are also in TDD mode, and hence NR still faces the problem of remote interference.
In particular, in the presence of the atmospheric wave guide phenomenon, a downlink signal of an interfering source gNB (agressor) may propagate over long distances and interfere with an uplink signal of an interfered gNB (Victim) far away therefrom. And the farther the agressor is away from the Victim, the larger the time delay is, and the more symbols are interfered on the uplink of the Victim.
Since the generation of remote Interference comes from the accumulation of multiple remote gNB Interference at different distances, the IoT (Interference over Thermal Noise) in Victim can exhibit a "tilt" characteristic, symbols closer to the guard interval can be subject to accumulated Interference caused by more aggresors, and the Interference power caused by closer aggresors is larger, which results in the "tilt" characteristic of IoT in the time domain.
At present, the remote interference scene can be mainly summarized into a symmetric interference scene and an asymmetric interference scene.
The symmetric interference scenario mainly refers to the phenomenon of atmospheric waveguide, in which IoT is symmetrically increased at two gnbs causing remote interference with each other, and this situation is often caused by the network topology of the system, and is relatively easy to occur point-to-point or cluster-to-cluster with the same density.
While asymmetric interference mainly refers to the asymmetric increase of IoT at two gnbs causing remote interference with each other if atmospheric waveguiding phenomenon occurs, which occurs because some gnbs suffer more remote interference caused by gnbs due to a specific network topology or different density of gnbs in different areas.
Disclosure of Invention
The invention provides a method for remote interference management and network side equipment, and provides a design scheme of a remote interference double reference signal, which can assist an interference party and an interfered party to carry out remote interference management.
In a first aspect, the present invention provides a remote interference management method, including:
when the interfered party is determined to be subjected to remote interference, continuously transmitting a first reference signal, and starting reference signal monitoring;
when a second reference signal sent by an interference party is monitored, the remote interference of the interference party is determined, and the sequences of the first reference signal and the second reference signal are different.
In a second aspect, the present invention provides a remote interference management method, including:
the interference party starts reference signal monitoring;
when a first reference signal sent by an interfered party is received, determining that remote interference is caused to the interfered party, and continuously transmitting a second reference signal, wherein the sequence of the second reference signal is different from that of the first reference signal.
In a third aspect, the present invention provides a network side device, which includes a processor and a memory, where the memory stores program codes, and when the program codes are executed by the processor, the processor is caused to execute the steps of the remote interference management method for an interfered party.
In a fourth aspect, the present invention provides a network side device, which includes a processor and a memory, where the memory stores program codes, and when the program codes are executed by the processor, the processor is caused to execute the steps of the above-mentioned remote interference management method for an interferer.
The method for performing remote interference management and the network side device of the embodiment of the invention have the following advantages:
the design scheme of the remote interference double reference signals is provided, the interference party and the interfered party can be assisted to carry out remote interference management, and the first reference signals and the second reference signals adopt different sequences, so that the flexibility of reference signal design is improved.
Drawings
Fig. 1 is a block diagram of a remote interference management system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an interaction between an interfered party and an interfering party according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an interaction between an interfered party and an interfering party when a backhaul link exists according to an embodiment of the present invention;
fig. 4 is a first network-side device structure diagram according to an embodiment of the present invention;
fig. 5 is a diagram of a second network-side device structure according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for remote interference management of an interfered party according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for performing remote interference management by an interferer according to an embodiment of the present invention.
Detailed Description
The remote interference management method provided by the embodiment of the invention is applied to network side equipment, the network side equipment can be a base station, and the network side equipment is equipment for providing a wireless communication function for a terminal, and the method comprises the following steps of: gNB in 5G, and NB in TD-LTE system. The base station in the present application may also be a device that provides a terminal with a wireless communication function in other communication systems that may appear in the future.
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.
Example 1
An embodiment of the present invention provides a remote interference management system, as shown in fig. 1, the system includes:
the interfered party 10 is used for continuously transmitting a first reference signal RS-1 and starting reference signal monitoring when the interfered party is determined to be subjected to remote interference; when a second reference signal RS-2 sent by an interference party is monitored, the remote interference of the interference party is determined;
an interferer 20 to initiate reference signal monitoring; and when the first reference signal RS-1 sent by the interfered party is received, determining that the remote interference is caused to the interfered party, and continuously transmitting a second reference signal RS-2.
And the sequences of the first reference signal RS-1 and the second reference signal RS-2 are not the same.
The interfered party and the interfering party may use a base station of the same wireless network, and the wireless network may be a 5G network or a TD-LTE network.
The design scheme of the remote interference double-reference signal provided by the embodiment of the invention can assist an interfering party and an interfered party to carry out remote interference management, so that the accuracy of the remote interference management is improved.
Optionally, the interfered party 10 monitors the cancellation of the second reference signal RS-2, determines the remote interference cancellation of the interfering party 20, and stops transmitting the first reference signal RS-1.
When monitoring that the first reference signal RS-1 is eliminated, the interferer 20 determines to eliminate the remote interference and stops transmitting the second reference signal RS-2.
Optionally, when the interfered party 10 determines that the second reference signal RS-2 is not monitored beyond the set time period, it determines that the second reference signal RS-2 is monitored to be eliminated.
Optionally, when the interferer 20 determines that the first reference signal RS-1 is not monitored for more than the set duration, it determines that the first reference signal RS-1 is monitored for cancellation.
Optionally, when one of the interfering party and the interfered party in the remote interference management system monitors remote interference, remote interference suppression is performed by adjusting local transmission resources. Or, when the remote interference is monitored, the remote interference suppression is performed by adjusting local transmission resources.
As an optional embodiment, the interfered party/interfering party performs remote interference suppression by adjusting a local transmission resource, where the interfered transmission resource may be an uplink resource or a downlink resource.
When the interfered party adjusts the local uplink resource, some uplink resource symbol transmission may be abandoned, and/or the power of the uplink resource symbol of the interfered party may be increased.
When the interfering party adjusts the local uplink resource, some downlink resource symbol transmission may be discarded and/or the power of the downlink resource symbol of the interfered party may be reduced.
Optionally, when the interfered party determines remote interference cancellation of the interfering party, the interfered party restores the original transmission resource configuration by adjusting the local transmission resource.
Optionally, when the interferer determines to cancel the remote interference, the original transmission resource configuration is restored by adjusting the local transmission resources.
In the implementation, the interfered party discovers remote interference by using interference thermal noise IoT, when the IoT exceeds a certain threshold value, the remote interference is determined to be generated, reference signal monitoring is started, the interfered party sends a first reference signal RS-1, and the interfering party can receive the first reference signal RS-1 and then is regarded as the interfering party.
In implementation, the reference signal monitoring is performed by the interferer, either according to a system automatically managing OAM configuration or initiated due to the remote interference encountered.
In the initial state, the method and the device can accurately detect whether the remote interference exists or not by using the double reference signals, so that the accuracy and the reliability of the detection result are improved.
The specific implementation of the above RS-1 and RS-2 in this example is as follows:
the sequence of the first reference signal RS-1 is used for the interference party to determine that the interference party causes remote interference to the interfered party;
the sequence of the second reference signal RS-2 is used for the interfered party to determine that it is remotely interfered, and resource information for the interfered party to determine that it is remotely interfered.
Optionally, the remote interference may be uplink resource remote interference or downlink resource remote interference.
Specifically, the downlink resource of the interfering party interferes with the uplink resource of the interfered party.
Optionally, the resource information may be uplink resource information or downlink resource information.
Specifically, the sequence of the first reference signal RS-1 is used for the interfering party to determine that remote interference is caused to the interfered party, and the sequence of the second reference signal RS-2 is used for the interfered party to determine that remote interference is caused to the interfered party and for the interfered party to determine uplink resource information subjected to remote interference.
Optionally, the resource information may include, but is not limited to, resource location information, resource quantity information, and the like.
Specifically, the sequence of the first reference signal RS-1 is used for the interfering party to determine that the remote interference is caused to the interfered party, and the sequence of the second reference signal RS-2 is used for the interfered party to determine that the remote interference is caused to the interfered party, and for the interfered party to determine the uplink resource location information/uplink resource symbol number information subjected to the remote interference.
Optionally, the determining, by the interfered party, the first reference signal RS-1 includes:
and when the interfered party determines to receive the remote interference, generating a first reference signal RS-1 by adopting the same signal generation method as the second reference signal RS-2.
Specifically, a sequence including an indicator bit indicating that the interfering party determines that remote interference is caused to the uplink resource of the interfered party can be determined, and the first reference signal RS-1 is obtained for the sequence according to a corresponding coding scheme.
Optionally, the determining, by the interferer, the second reference signal RS-2 includes:
when the interference party determines to receive the remote interference, determining the uplink resource position information/uplink resource symbol number information influenced by the interference party by the interfered party;
and determining a second reference signal RS-2 according to the determined uplink resource position information/uplink resource symbol number information of the interfered party affected by the interfering party.
In this embodiment, the determination, by the interferer in the embodiment, of the uplink resource symbol affected by the interferer may be performed in an existing manner, for example, by using a first reference signal correlation decision of a receiver detection window in a time domain or a frequency domain to draw a conclusion.
After the interfering party determines the uplink resource symbol position information/uplink resource symbol number information affected by the interfering party, a sequence including an indication bit indicating that the interfered party is affected by the interfering party may be determined based on the determined uplink resource symbol position information/uplink resource symbol number information affected by the interfering party, and a first reference signal RS-2 is obtained for the sequence according to a corresponding coding scheme.
Further, the sequence of the first reference signal RS-1 is an anti-multipath delay spread sequence, and the second reference signal RS-2 is a pseudo-random sequence.
The length of the pseudo-random sequence may be, but is not limited to, a Gold sequence having a length of 31, and any sequence length may be used as long as it can satisfy the signal requirement.
The length of the pseudo-random sequence is related to the length of the uplink resource symbol position information/uplink resource symbol quantity information, and the more the uplink resource symbol position information/uplink resource symbol quantity information is, the longer the length of the pseudo-random sequence is.
The pseudo random sequence is provided with corresponding indication bits, and different coding combinations corresponding to the indication bits are used for indicating the combination of uplink resource symbol position information/uplink resource symbol quantity information influenced by the interference party by the interfered party.
In implementation, the interferer may determine the number of required indicator bits in advance according to the length of the uplink resource symbol position information/uplink resource symbol number information, determine the length of the pseudorandom sequence according to the number of the determined indicator bits, pre-establish a mapping relationship between different coding combinations corresponding to the indicator bits and the uplink resource symbol position information/uplink resource symbol number information interference combinations, determine the uplink resource symbol position information/uplink resource symbol number information affected by the interferer when the remote interference is determined to be monitored, determine the coding combinations on the indicator bits according to the pre-established mapping relationship between the different coding combinations corresponding to the indicator bits and the uplink resource symbol position information/uplink resource symbol number information interference combinations, and generate the pseudorandom sequence used by the second reference signal RS-2 according to the preset signal generation method.
As an optional implementation, the interfered party modulates the uplink resource, which may be to discard some uplink symbol transmissions and/or increase the power of the uplink resource symbol of the interfered party. In the specific implementation, the scheme of remote interference suppression can be flexibly adjusted according to the measurement report of RS-2.
And after the remote interference disappears after the interference is determined, recovering the original uplink resource configuration. And after the interference party determines that the remote interference disappears, recovering the original downlink resource allocation.
In the embodiment of the invention, when the device is in the initial state, the double reference signals are used for accurately detecting whether the remote interference exists, so that the accuracy and the reliability of the detection result are improved. The sequences and the effects of the two reference signals are different, so that the flexibility of the reference signal design is improved.
The interaction flow between the interferer and the interferer in the remote interference management system of the present invention is given below with the interferer and the interferer in the remote interference management system as gNB, as shown in fig. 2, and mainly includes the following steps:
and step 0, the interference party gNB (aggregator) generates remote interference on the interfered party gNB (Victim).
In the case of an atmospheric waveguide, the downlink signal of an interfering gNB (Aggressor) may propagate over long distances and interfere with the uplink signal of a Victim gNB (Victim) away from it.
Step 1, the interfered party gNB detects remote interference and starts reference signal monitoring, and meanwhile, the first reference signal RS-1 is continuously transmitted to the interfering party gNB.
The interfered party gNB uses the interference thermal noise IoT to find the remote interference, and when the IoT exceeds a certain threshold value, the remote interference is determined to be generated.
The specific way in which the victim gbb discovers the remote interference using the interfering thermal noise IoT may be in an existing way and will not be described in detail here.
And step 2, the interference party gNB is configured or determined by the OAM to be subjected to remote interference and starts reference signal monitoring.
Unlike the interfered party gNB side directly triggered by the remote interference to trigger the reference signal monitoring, the triggering condition of the reference signal monitoring mechanism of the interfering party includes the remote interference triggering and OAM configuration triggering.
When the remote interference trigger is adopted, the interference part gNB uses interference thermal noise IoT to find remote interference, and when the IoT exceeds a certain threshold value, the remote interference is determined to be generated.
And step 3, after monitoring the RS-1, the interference party gNB sends an RS-2 to inform the interfered party gNB that the remote interference still exists.
Step 4, after receiving the RS-2 sent by the interference party gNB, the interfered party gNB adjusts the local uplink resource to perform remote interference suppression;
and step 5, when the interfered party gNB cannot detect the RS-1 from the interfering party gNB, restoring the original configuration of the interfered party gNB and stopping transmitting the RS-2.
The original configuration includes original uplink transmission resource configuration, whether to continue reference signal monitoring, and the like.
And 6, when the interference party gNB cannot detect the RS-2 from the interfered party gNB, restoring the original configuration.
The original configuration includes whether to continue reference signal monitoring or not.
Example 2
The embodiment of the invention provides a remote interference management system, which is different from the embodiment 1 in the implementation mode of sequences of a first reference signal RS-1 and a second reference signal RS-.
In this embodiment, the sequence of the first reference signal RS-1 is used to enable the interfering party to determine that remote interference is caused to the interfered party and to enable the interfering party to determine resource information that remote interference is caused to the interfered party, and the sequence of the second reference signal RS-2 is used to enable the interfered party to determine that remote interference is caused.
Optionally, the remote interference may be uplink resource remote interference or downlink resource remote interference.
Specifically, it may be that downlink resource transmission of the interfering party interferes with uplink resource transmission of the interfered party.
Optionally, the resource information may be uplink resource information or downlink resource information.
Specifically, the sequence of the first reference signal RS-1 is used for the interfering party to determine that the uplink resource of the interfered party causes remote interference, and the interfering party to determine resource information causing remote interference to the interfered party, and the sequence of the second reference signal RS-2 is used for the interfered party to determine that the interfered party is subjected to remote interference of the uplink resource.
Optionally, the resource information may include, but is not limited to, resource location information, resource quantity information, and the like.
Specifically, the sequence of the first reference signal RS-1 is used for the interfering party to determine that the remote interference is caused to the interfered party, and the uplink resource location information/uplink resource symbol number information causing the remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal RS-2 is used for the interfered party to determine that the remote interference is caused to the interfered party.
Optionally, the determining, by the interfered party, the first reference signal RS-1 includes:
when the interfered party determines to receive the remote interference, determining uplink resource position information/uplink resource symbol number information influenced by the interfered party;
and determining a first reference signal according to the determined uplink resource position information/uplink resource symbol number information affected by the interference party.
In this embodiment, the uplink resource symbol affected by the interferer and determined by the interferer may be determined in an existing manner, for example, according to a distribution situation of interference thermal noise IoT, and the like, if the interference thermal noise IoT occurs at a position of the uplink resource symbol, it is determined that the uplink resource symbol at the position is interfered, so that location information/number information of uplink resource symbols affected by all the interferers may be determined.
And after the interfered party determines the position information/the number information of the uplink resource symbols influenced by the interfered party, generating a first reference signal RS-1 by adopting the same signal generation method as the second reference signal RS-2. Specifically, a sequence including an indicator indicating the uplink resource symbol position information/uplink resource symbol number information affected by the interferer may be determined based on the determined uplink resource symbol position information/uplink resource symbol number information affected by the interferer, and the first reference signal RS-1 is obtained for the sequence according to a corresponding coding scheme.
Further, the sequence of the first reference signal RS-1 is a pseudo-random sequence, and the second reference signal RS-2 is an anti-multipath delay spread sequence.
The length of the pseudo-random sequence may be, but not limited to, a Gold sequence having a length of 31, and may be any sequence length that can satisfy the signal requirement.
The length of the pseudo-random sequence is related to the length of the uplink resource symbol position information/uplink resource symbol quantity information, and the more the uplink resource symbol position information/uplink resource symbol quantity information is, the longer the length of the pseudo-random sequence is. In particular, the length of the Gold sequence may be 31 or other lengths.
The pseudo random sequence is provided with corresponding indication bits, and different coding combinations corresponding to the indication bits are used for indicating the combination of uplink resource symbol position information/uplink resource symbol quantity information influenced by the interference party by the interfered party.
In implementation, the interferer may determine the number of required indicator bits in advance according to the length of the uplink resource symbol position information/uplink resource symbol quantity information, determine the length of the pseudorandom sequence according to the number of the determined indicator bits, pre-establish a mapping relationship between different coding combinations corresponding to the indicator bits and the uplink resource symbol position information/uplink resource symbol quantity information interference combinations, determine the uplink resource symbol position information/uplink resource symbol quantity information affected by the interferer when it is determined that remote interference is monitored, determine the coding combinations on the indicator bits according to the pre-established mapping relationship between different coding combinations corresponding to the indicator bits and the uplink resource symbol position information/uplink resource symbol quantity information interference combinations, and generate the pseudorandom sequence used by the second reference signal RS-2 according to the preset signal generation method.
All the above mentioned sequences are anti-multipath delay spread sequences, ZC (Zadoff-chu) or other random sequences.
The anti-multipath delay spread sequence is provided with corresponding indication bits, and different coding combinations corresponding to the indication bits are used for indicating the interference party to determine that the remote interference is caused to the interfered party.
In implementation, the interferer may determine in advance an indication bit indicating that the interfered party is determined to be subjected to remote interference, determine a code combination on the indication bit, and generate the anti-multipath delay spread sequence used by the second reference signal RS-2 according to a preset signal generation method.
Example 3
In this embodiment, a backhaul link exists between the interfering party and the interfered party, where the backhaul link is a channel connected between the interfering party and the interfered party through a physical channel, and the physical channel may be an optical fiber connection channel.
According to the remote interference management system provided by the embodiment of the invention, when the interfered party determines that the interference exists, the transmission of the first reference signal is stopped, and when the interfering party determines that the remote interference exists, the reference signal monitoring is stopped, so that the signaling interaction is reduced, the system resource overhead is saved, and meanwhile, when the interference elimination is determined, the interfered party sends the interference elimination indication to the interfering party through the return link.
In implementation, in this embodiment, the interfering party receives the first reference signal RS-1 from the interfered party, and stops monitoring the first reference signal RS-1 when determining that the backhaul link exists.
After receiving RS-1, the interference party determines that the interference is not eliminated and then transmits a second reference signal RS-2 back to assist in monitoring the disappearance of the remote interference.
As another optional implementation, the interfering party and the interfered party respectively determine whether a backhaul link exists through pre-configuration, the interfered party monitors the RS-2 sent by the interfering party, and stops transmitting the RS-1 when determining that the backhaul link exists, and the interfering party monitors the RS-1 sent by the interfered party and stops monitoring the reference signal when determining that the backhaul link exists.
Optionally, when one of the interfering party and the interfered party in the remote interference management system monitors remote interference, remote interference suppression is performed by adjusting local transmission resources. Or, when the interferer and the interferer are monitoring remote interference, performing remote interference suppression by adjusting local transmission resources.
As an optional embodiment, the interfered party/interfering party performs remote interference suppression by adjusting a local transmission resource, where the interfered transmission resource may be an uplink resource or a downlink resource.
When the interfered party adjusts the local uplink resource, some uplink resource symbol transmission may be abandoned, and/or the power of the uplink resource symbol of the interfered party may be increased.
When the interfering party adjusts the local uplink resource, some downlink resource symbol transmission may be discarded and/or the power of the downlink resource symbol of the interfered party may be increased.
Optionally, when the interfered party determines that the remote interference of the interfering party is eliminated, after the interference is known to the interfering party through the backhaul link to disappear, the interfered party restores the original transmission resource configuration by adjusting the local transmission resource.
Optionally, when the interferer determines to cancel the remote interference, the original transmission resource configuration is restored by adjusting the local transmission resources.
By utilizing the remote interference management system provided by the embodiment of the invention, the backhaul link is adopted to inform the interference party to stop the transmission of the second reference signal RS-2, so that the interference party recovers the original transmission resource configuration, and the transmission efficiency and accuracy are improved; and under the condition that the backhaul link does not exist, the interfered party continuously transmits the RS-1 before determining that the interference disappears, and the interfering party continuously transmits the RS-2 before determining that the interference is eliminated, so that the normal operation of the system under the condition that the backhaul link does not exist in the remote interference management scheme is ensured.
In the following, taking the case that both the interfered party and the interfering party in the remote interference management system are the gNB, an interaction flow between the interfering party and the interfered party in the remote interference management system of the present invention is given, as shown in fig. 3, which mainly includes the following steps:
and step 0, the interference party gNB (aggregator) generates remote interference on the interfered gNB (Victim).
In the case of an atmospheric waveguide, the downlink signal of an interfering gNB (Aggressor) may propagate over long distances and interfere with the uplink signal of a Victim gNB (Victim) away from it.
Step 1, the interfered party gNB detects remote interference and starts reference signal monitoring, and transmits a first reference signal RS-1 to the interfering party gNB.
The victim gNB uses the interference thermal noise IoT to find the remote interference, and determines that the remote interference is generated when the IoT exceeds a certain threshold.
The specific way in which the victim gbb discovers the remote interference using the interfering thermal noise IoT may be in an existing way and will not be described in detail here.
And step 2, the interference party gNB is configured or determined by the OAM to be subjected to remote interference and starts reference signal monitoring.
Unlike the interfered party gNB side directly triggered by the remote interference to trigger the reference signal monitoring, the triggering condition of the reference signal monitoring mechanism of the interfering party includes the remote interference triggering and OAM configuration triggering.
When the remote interference trigger is adopted, the interference part gNB uses interference thermal noise IoT to find remote interference, and when the IoT exceeds a certain threshold value, the remote interference is determined to be generated.
And step 3, after monitoring the RS-1, the interference party gNB sends an RS-2 to inform the interfered party gNB that the remote interference still exists.
And step 4, after receiving the RS-2 sent by the interference party gNB, the interfered party gNB adjusts the local uplink resource to perform remote interference suppression, and stops transmitting the first reference signal RS-1.
In this embodiment, a backhaul link exists between the interfered party gNB and the interfering party gNB, and then after the interfered party gNB receives the RS-2, the interfered party gNB stops sending the RS-1, and the interfering party gNB stops reference signal detection, but the interfering party gNB defaults to the existence of remote interference;
and step 5, when the interfered party gNB cannot monitor the RS-2 from the interfering party gNB, determining remote interference elimination, recovering the original configuration of the interfered party gNB, and sending RS-2 disappearance indication information to the interfering party gNB through a backhaul link.
And step 6, the interference party gNB receives the RS-2 disappearance indication information through the backhaul link, determines remote interference elimination, stops RS-2 transmission and restores the original configuration by adjusting downlink resource configuration.
Example 4
The embodiment of the present invention further provides a first network side device, which is an interfered party, and includes a processor and a memory, where the memory stores program codes, and when the program codes are executed by the processor, the processor executes the following steps:
when the interfered party is determined to be subjected to remote interference, continuously transmitting a first reference signal, and starting reference signal monitoring;
when a second reference signal sent by an interference party is monitored, the remote interference of the interference party is determined, and the sequences of the first reference signal and the second reference signal are different.
Optionally, the processor is further configured to monitor that the second reference signal is cancelled, determine remote interference cancellation of the interferer, and stop transmitting the first reference signal.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and for the interfering party to determine resource information causing remote interference to the interfered party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and for the interfered party to determine resource information causing remote interference; or alternatively
The sequence of the first reference signal is used for the interference part to determine that the interference part causes remote interference to the interfered part, and the sequence of the second reference signal is used for the interference part to determine that the interference part is subjected to remote interference.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference is determined by the interfered party; or
The sequence of the first reference signal is used for the interference part to determine that remote interference is caused to uplink resources of the interfered part, and the sequence of the second reference signal is used for the interfered part to determine that remote interference to the uplink resources is caused.
Optionally, the resource information includes a resource symbol number/resource symbol position.
Optionally, the sequences of the second reference signal and the first reference signal are both pseudo-random sequences; or alternatively
The sequences of the second reference signal and the first reference signal are anti-multipath delay spread sequences
The embodiment of the present invention further provides a first network-side device, which is an interferer and includes a processor and a memory, where the memory stores program codes, and when the program codes are executed by the processor, the processor executes the following steps:
the interference party starts reference signal monitoring;
when a first reference signal sent by an interfered party is received, determining that remote interference is caused to the interfered party, and continuously transmitting a second reference signal, wherein the sequence of the second reference signal is different from that of the first reference signal.
Optionally, the processor is further configured to determine remote interference cancellation and stop transmitting the second reference signal when it is monitored that the first reference signal is cancelled.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and resource information causing remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and resource information causing remote interference to the interfered party is determined by the interfered party; or alternatively
The sequence of the first reference signal is used for the interference part to determine that remote interference is caused to the interfered part, and the sequence of the second reference signal is used for the interfered part to determine that remote interference is caused to the interfered part.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and for the interfering party to determine uplink resource information causing remote interference to the interfered party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and for the interfered party to determine uplink resource information subjected to remote interference; or alternatively
The sequence of the first reference signal is used for the interference part to determine that remote interference is caused to uplink resources of the interfered part, and the sequence of the second reference signal is used for the interfered part to determine that remote interference is caused to the uplink resources.
The resource information includes a resource symbol number/resource symbol position.
Optionally, the sequences of the second reference signal and the first reference signal are both pseudo-random sequences; or alternatively
And the sequences of the second reference signal and the first reference signal are anti-multipath delay spread sequences.
An embodiment of the present invention provides a second network-side device, where the network-side device is an interfered party, as shown in fig. 4, and the network-side device includes:
the interference monitoring module 401 is configured to continuously transmit a first reference signal and start reference signal monitoring when the interfered party determines that the interfered party is subjected to remote interference;
an interference existence determining module 402, configured to determine that the first reference signal and the second reference signal have different sequences, and when a second reference signal sent by an interferer is monitored, the second reference signal is remotely interfered by the interferer.
Optionally, the method further comprises:
and an interference cancellation determining module 403, configured to monitor cancellation of the second reference signal, determine remote interference cancellation of the interferer, and stop transmitting the first reference signal.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and for the interfering party to determine resource information causing remote interference to the interfered party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and for the interfered party to determine resource information causing remote interference; or
The sequence of the first reference signal is used for the interference part to determine that the interference part causes remote interference to the interfered part, and the sequence of the second reference signal is used for the interference part to determine that the interference part is subjected to remote interference.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference is determined by the interfered party; or
The sequence of the first reference signal is used for the interference part to determine that remote interference is caused to uplink resources of the interfered part, and the sequence of the second reference signal is used for the interfered part to determine that remote interference is caused to the uplink resources.
Optionally, the resource information includes a resource symbol number/resource symbol position.
Optionally, the sequences of the second reference signal and the first reference signal are both pseudo-random sequences; or alternatively
And the sequences of the second reference signal and the first reference signal are anti-multipath delay spread sequences.
An embodiment of the present invention further provides a second network-side device, as shown in fig. 5, including:
a reference signal monitoring module 501, configured to start reference signal monitoring;
an interference existence determining module 502, configured to determine that remote interference is caused to an interfered party when receiving a first reference signal sent by the interfered party, and continuously transmit a second reference signal, where a sequence of the second reference signal is different from a sequence of the first reference signal.
Optionally, the method further comprises:
an interference cancellation determining module 503, configured to determine remote interference cancellation and stop transmitting the second reference signal when it is monitored that the first reference signal is cancelled.
The sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and resource information causing the interfering party to determine remote interference to the interfered party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and resource information causing the interfered party to determine remote interference; or
The sequence of the first reference signal is used for the interference part to determine that the interference part causes remote interference to the interfered part, and the sequence of the second reference signal is used for the interference part to determine that the interference part is subjected to remote interference.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference is determined by the interfered party; or
The sequence of the first reference signal is used for the interference part to determine that remote interference is caused to uplink resources of the interfered part, and the sequence of the second reference signal is used for the interfered part to determine that remote interference is caused to the uplink resources.
Optionally, the resource information includes a resource symbol number/resource symbol position.
Optionally, the sequences of the second reference signal and the first reference signal are both pseudo-random sequences; or
And the sequences of the second reference signal and the first reference signal are anti-multipath delay spread sequences.
Example 5
Based on the same inventive concept, the embodiment of the present invention further provides a remote interference management method, which is applied to an interfered party, and since a device corresponding to the method is an interfered party in the remote interference management system according to the embodiment of the present invention, and a principle of solving problems of the method is similar to that of the device, implementation of the method can refer to implementation of the system, and repeated details are omitted.
As shown in fig. 6, a method for remote interference management of an interfered party according to an embodiment of the present invention includes:
Optionally, the method further comprises:
and monitoring the second reference signal elimination, determining the remote interference elimination of the interference party, and stopping transmitting the first reference signal.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and resource information causing remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and resource information causing remote interference to the interfered party is determined by the interfered party; or alternatively
The sequence of the first reference signal is used for the interference part to determine that the interference part causes remote interference to the interfered part, and the sequence of the second reference signal is used for the interference part to determine that the interference part is subjected to remote interference.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and for the interfering party to determine uplink resource information causing remote interference to the interfered party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and for the interfered party to determine uplink resource information subjected to remote interference; or
The sequence of the first reference signal is used for the interference part to determine that remote interference is caused to uplink resources of the interfered part, and the sequence of the second reference signal is used for the interfered part to determine that remote interference is caused to the uplink resources.
Optionally, the resource information includes a resource symbol number/resource symbol position.
Optionally, the sequences of the second reference signal and the first reference signal are both pseudo-random sequences; or
And the sequences of the second reference signal and the first reference signal are anti-multipath delay spread sequences.
Based on the same inventive concept, the embodiment of the present invention further provides a remote interference management method, which is applied to an interferer, and since a device corresponding to the method is an interferer in the remote interference management system of the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the implementation of the method can refer to the implementation of the system, and repeated details are omitted.
Fig. 7 is a flowchart of a method for providing remote interference management according to an embodiment of the present invention, including:
Optionally, the method further comprises:
and when the first reference signal is monitored to be eliminated, determining remote interference elimination and stopping transmitting a second reference signal.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and resource information causing remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and resource information causing remote interference to the interfered party is determined by the interfered party; or alternatively
The sequence of the first reference signal is used for the interference part to determine that the interference part causes remote interference to the interfered part, and the sequence of the second reference signal is used for the interference part to determine that the interference part is subjected to remote interference.
Optionally, the sequence of the first reference signal is used for the interfering party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference to the interfered party is determined by the interfering party, and the sequence of the second reference signal is used for the interfered party to determine that remote interference is caused to the interfered party and uplink resource information causing remote interference is determined by the interfered party; or
The sequence of the first reference signal is used for the interference part to determine that remote interference is caused to uplink resources of the interfered part, and the sequence of the second reference signal is used for the interfered part to determine that remote interference is caused to the uplink resources.
Optionally, the resource information includes a resource symbol number/resource symbol position.
Optionally, the sequences of the second reference signal and the first reference signal are both pseudo-random sequences; or
And the sequences of the second reference signal and the first reference signal are anti-multipath delay spread sequences.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, 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, 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, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
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 (5)
1. A method for remote interference management, the method comprising:
when the interfered party is determined to be subjected to remote interference, continuously transmitting a first reference signal, and starting reference signal monitoring;
when a second reference signal sent by an interference party is monitored, determining that the interference party is remotely interfered by the interference party, wherein the sequences of the first reference signal and the second reference signal are different;
the sequence of the first reference signal is an anti-multipath delay spread sequence, the second reference signal is a pseudo-random sequence, and the length of the pseudo-random sequence is a Gold sequence of 31;
corresponding indication bits are arranged on the pseudo-random sequence, and different coding combinations corresponding to the indication bits are formed;
the sequence of the first reference signal is used for enabling an interfering party to determine that remote interference is caused to an interfered party, and the sequence of the second reference signal is used for enabling the interfered party to determine that the interfered party is subjected to remote interference and enabling the interfered party to determine uplink resource symbol position information/uplink resource symbol quantity information subjected to remote interference, wherein the interfering party determines a code combination on an indicator bit according to a mapping relation between different code combinations corresponding to the indicator bit and uplink resource symbol position information/uplink resource symbol quantity information interference combinations which are established in advance based on the determined uplink resource symbol position information/uplink resource symbol quantity information which are influenced by the interfered party, and generates a pseudo-random sequence used by the second reference signal according to a preset signal generation method; or
The sequence of the first reference signal is a pseudo-random sequence, the sequence of the second reference signal is an anti-multipath delay spread sequence, and the length of the pseudo-random sequence is a Gold sequence of 31;
corresponding indication bits are arranged on the pseudo-random sequence, and different coding combinations corresponding to the indication bits are formed;
the sequence of the first reference signal is used for enabling an interfering party to determine that remote interference is caused to an interfered party and enabling the interfering party to determine uplink resource symbol position information/uplink resource symbol quantity information causing remote interference to the interfered party, and the sequence of the second reference signal is used for enabling the interfered party to determine that the interfered party is subjected to remote interference, wherein the interfered party determines a code combination on an indication bit according to a mapping relation between different code combinations corresponding to the indication bit and the uplink resource symbol position information/uplink resource symbol quantity information interference combination which is established in advance based on the determined uplink resource symbol position information/uplink resource symbol quantity information which is influenced by the interfering party, and generates a pseudo-random sequence used by the first reference signal according to a preset signal generation method.
2. The method of claim 1, further comprising:
and monitoring the second reference signal elimination, determining the remote interference elimination of the interference party, and stopping transmitting the first reference signal.
3. A method for remote interference management, comprising:
the interference party starts reference signal monitoring;
when a first reference signal sent by an interfered party is received, determining that remote interference is caused to the interfered party, and continuously transmitting a second reference signal, wherein the sequences of the second reference signal and the first reference signal are different;
the sequence of the first reference signal is an anti-multipath delay spread sequence, the second reference signal is a pseudo-random sequence, and the length of the pseudo-random sequence is a Gold sequence of 31;
the pseudo-random sequence is provided with corresponding indication bits and different coding combinations corresponding to the indication bits, and the interference party establishes a mapping relation between the different coding combinations corresponding to the indication bits and the uplink resource symbol position information/uplink resource symbol quantity information interference combination in advance;
the sequence of the first reference signal is used for enabling an interfering party to determine that remote interference is caused to an interfered party, and the sequence of the second reference signal is used for enabling the interfered party to determine that the interfered party is subjected to remote interference and enabling the interfered party to determine uplink resource symbol position information/uplink resource symbol quantity information subjected to remote interference, wherein the interfering party determines a code combination on an indication bit according to the mapping relation established in advance based on the determined uplink resource symbol position information/uplink resource symbol quantity information influenced by the interfered party, and generates a pseudo-random sequence used by the second reference signal according to a preset signal generation method; or
The sequence of the first reference signal is a pseudo-random sequence, the sequence of the second reference signal is an anti-multipath delay spread sequence, and the length of the pseudo-random sequence is a Gold sequence of 31;
the pseudo-random sequence is provided with corresponding indication bits and different coding combinations corresponding to the indication bits, and the interference party establishes a mapping relation between the different coding combinations corresponding to the indication bits and the uplink resource symbol position information/uplink resource symbol quantity information interference combination in advance;
the sequence of the first reference signal is used for enabling an interfering party to determine that remote interference is caused to an interfered party and enabling the interfering party to determine uplink resource symbol position information/uplink resource symbol quantity information causing remote interference to the interfered party, and the sequence of the second reference signal is used for enabling the interfered party to determine that the interfered party is subjected to remote interference, wherein the interfered party determines a code combination on an indication bit according to the mapping relation established in advance based on the determined uplink resource symbol position information/uplink resource symbol quantity information affected by the interfering party, and generates a pseudo-random sequence used by the first reference signal according to a preset signal generation method.
4. The method of claim 3, further comprising:
and when the first reference signal is monitored to be eliminated, remote interference elimination is determined, and the transmission of a second reference signal is stopped.
5. A network-side device comprising a processor and a memory, wherein the memory stores program code, which, when executed by the processor, causes the processor to perform the steps of the method according to claim 1 or 2, or to perform the steps of the method according to claim 3 or 4.
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| CN114363795A (en) * | 2020-09-27 | 2022-04-15 | 中国移动通信有限公司研究院 | Method, apparatus, device and medium for locating far-end interference |
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| CN110971379A (en) | 2020-04-07 |
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| CN110971380B (en) | 2022-06-03 |
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