CN110149645B - Method and device for measuring wireless channel interference - Google Patents
Method and device for measuring wireless channel interference Download PDFInfo
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- CN110149645B CN110149645B CN201910275129.6A CN201910275129A CN110149645B CN 110149645 B CN110149645 B CN 110149645B CN 201910275129 A CN201910275129 A CN 201910275129A CN 110149645 B CN110149645 B CN 110149645B
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Abstract
The invention relates to the field of information transmission, and provides a method and a device for measuring wireless channel interference. And acquiring the time slot interference cell number in the relevant cell according to the first transmission information and the second transmission information. And determining the base station measurement resource allocation of the cells in the same range according to the number of the time slot interference cell. And configuring the measurement resource of the channel interference information for the base station of the relevant cell according to the measurement resource configuration of the base station. And obtaining the channel interference information of the time slot interference cell to the current service cell according to the measurement resource. The method can narrow the range of the measurement user and reduce the consumption of measurement resources.
Description
Technical Field
The present invention relates to the field of information transmission, and in particular, to a method and an apparatus for measuring wireless channel interference.
Background
In order to implement a remote driving function, it is necessary to receive surrounding environment information and a remote command via a wireless base station and upload information such as a current state of a vehicle and a service requirement to the wireless base station. The transmission quantity of the information is large, and the requirement on transmission delay is also high; and the data volume of uplink and downlink services can be greatly different at different driving stages and time nodes. Thus, the ratio of uplink and downlink data transmission amounts within the coverage area of each cell may be greatly different at each time. It is necessary to dynamically set uplink and downlink transmission resources in each cell. In this scenario, the interference of the cross link needs to be managed effectively, provided that the wireless channel information of the cross link is obtained.
The prior art applies an active measurement scheme, which means that all users in the network, who may have data transmission, need to measure possible CLI information before scheduling. In order to obtain the required measurement result, an independent resource needs to be allocated to each user to measure the received cross link interference strength; if the interference source needs to be further judged, other cells also need to coordinate the reference signal resource of each user in the coverage range to ensure that the user can measure the interference strength and the source from each user of other cells, and then an algorithm can be designed to realize interference elimination, thereby improving the transmission performance of the system.
In order to obtain the required interference measurement result, the current mainstream active measurement scheme consumes a large amount of measurement resources. As the number of system users increases, this overhead will offset the gain from the CLI management algorithm. In addition, in order to meet the remote driving requirements of a plurality of vehicles in an area, the 5G internet of vehicles needs to provide a transmission channel with higher speed and lower time delay. At this time, a 5G Radio Access Network (RAN) needs to efficiently manage the problem of mutual interference of multiple uplink and downlink transmission links (UL/DL), so as to ensure that the performance of the multiple links meets the speed and delay requirements of remote driving.
Disclosure of Invention
The technical problem to be solved by the invention is the problem of interference measurement resource configuration redundancy. In order to solve the above problems, the present invention provides a method and an apparatus for measuring wireless channel interference. The invention is realized by the following technical scheme:
a first aspect of the present invention provides a method for measuring radio channel interference, the method comprising:
acquiring first transmission information transmitted in a current service cell;
obtaining second transmission information transmitted in a relevant cell in the same range;
acquiring the number of each time slot interference cell in the related cell according to the first transmission information and the second transmission information;
determining the base station measurement resource allocation of the cells in the same range according to the serial numbers of the time slot interference cells;
according to the base station measurement resource configuration, configuring the measurement resource of the channel interference information for the base station of the relevant cell;
and obtaining the channel interference information of the time slot interference cell to the current service cell according to the measurement resource.
Further, the obtaining, according to the first transmission information and the second transmission information, the number of each timeslot interference cell in the relevant cell includes:
acquiring a first uplink and downlink time slot switching node corresponding to first transmission information;
acquiring a second uplink and downlink time slot switching node corresponding to second transmission information;
and acquiring the number of each time slot interference cell in the relevant cell according to the first uplink and downlink time slot switching node and the second uplink and downlink time slot switching node.
The configuring, according to the base station measurement resource configuration, measurement resources of channel interference information to a base station of a relevant cell includes:
and configuring channel reference information with zero power for the base station of the relevant cell according to the base station measurement resource configuration.
Further, before obtaining the first transmission information transmitted in the current serving cell, the method further includes:
and predefining channel interference type information of each base station for the base stations in each cell, wherein the channel interference type information is used for determining the type of channel interference.
Further, the determining, according to the number of the timeslot interference cell, the measurement resource configuration of the base station of the cell in the same range includes:
acquiring channel interference type information according to the time slot interference cell number;
and determining the base station measurement resource allocation of the cells in the same range according to the channel interference type information.
Further, the obtaining, according to the measurement resource, channel interference information of the timeslot interfering cell to the current serving cell includes:
measuring the total power received by the current service cell according to the measurement resources; obtaining user power of a current scheduling user;
and obtaining the interference power corresponding to the time slot interference cell according to the total power and the user power.
A second aspect of the present invention is a device for measuring radio channel interference, the device comprising: the system comprises a first transmission information acquisition module, a second transmission information acquisition module, a time slot interference cell number acquisition module, a measurement resource allocation module and a channel interference calculation module;
the first transmission information obtaining module is used for obtaining first transmission information transmitted in the current service cell;
the second transmission information acquisition module is used for acquiring second transmission information transmitted in a relevant cell in the same range;
the time slot interference cell number obtaining module is used for obtaining the time slot interference cell number according to the first transmission information and the second transmission information;
the measurement resource allocation module is used for determining the base station measurement resource allocation of the cells in the same range according to the time slot interference cell number and allocating the measurement resource of the channel interference information to the base station of the relevant cell according to the base station measurement resource allocation;
and the channel interference calculation module is used for obtaining the channel interference information of the time slot interference cell to the current service cell according to the measurement resource.
Further, the first transmission information obtaining module includes a first switching node obtaining unit;
the first switching node obtaining unit is used for obtaining a first uplink and downlink time slot switching node;
the second transmission information obtaining module comprises a second switching node obtaining unit;
the second uplink and downlink time slot switching node obtaining unit is used for obtaining a second switching node.
Further, the measurement resource configuration module comprises an interference type obtaining unit, a configuration information determining unit and a measurement resource configuration subunit;
the interference type obtaining unit is used for obtaining channel interference type information according to the time slot interference cell number;
the configuration information determining unit is used for determining the base station measurement resource configuration of the cells in the same range according to the channel interference type information;
the measurement resource allocation unit is used for allocating measurement resources of channel interference information to the base station of the relevant cell according to the base station measurement resource allocation.
Further, the channel interference calculation module includes a total power obtaining unit, a user power obtaining unit and an interference power obtaining unit;
the total power obtaining unit is used for measuring the total power received by the current service cell according to the measurement resource;
the user power obtaining unit is used for obtaining the user power of the current scheduling user;
the interference power obtaining unit is used for obtaining the interference power corresponding to the time slot interference cell according to the total power and the user power.
By adopting the technical scheme, the method and the device for measuring the wireless channel interference have the following beneficial effects that:
1) The invention provides a method for measuring wireless channel interference, wherein only a scheduled user or a base station passively measures channel interference information generated when an adjacent cell scheduled user or the base station transmits uplink or downlink data, the method can reduce the range of the measured user and reduce the consumption of measurement resources;
2) The invention provides a method for measuring wireless channel interference, which predefines channel interference type information so that all cells in a preset range can obtain the channel interference information and identify an interference source.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for measuring interference of a wireless channel according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for obtaining timeslot interference cell numbers according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for determining measurement resource allocation of a base station according to an embodiment of the present invention;
fig. 4 is a flowchart of obtaining channel interference information of a timeslot interference cell to a current serving cell according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an uplink and downlink timeslot switching node according to an embodiment of the present invention;
fig. 6 is a diagram illustrating an example of information transmission when a cluster is formed by three cells according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an apparatus for measuring radio channel interference according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a first transmission information obtaining module and a second transmission information obtaining module according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a measurement resource allocation module according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a channel interference calculation module according to an embodiment of the present invention.
The following is a supplementary description of the drawings:
201-a first transmission information obtaining module, 202-a second transmission information obtaining module, 203-a time slot interference cell number obtaining module, 204-a measurement resource configuration module, 205-a channel interference calculation module, 2001-a first switching node obtaining unit, 2002-a second switching node obtaining unit, 2003-an interference type obtaining unit, 2004-a configuration information determining unit, 2005-a measurement resource configuration subunit, 2006-a total power obtaining unit, 2007-a user power obtaining unit and 2008-an interference power obtaining unit.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be apparent that the described embodiments are only some of the embodiments of the present invention,
rather than all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the several embodiments provided in this application, the described system embodiments are only illustrative, for example, the division of the modules is only one logical function division, and there may be other division ways in actual implementation, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of modules or units through some interfaces, and may be in an electrical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
Example 1:
an embodiment of the present invention provides a method for measuring wireless channel interference, and as shown in fig. 1, the method includes:
s1, obtaining first transmission information transmitted in a current service cell;
s2, obtaining second transmission information transmitted in the related cells in the same range;
s3, acquiring a time slot interference cell number in the related cell according to the first transmission information and the second transmission information;
s4, determining the base station measurement resource allocation of the cells in the same range according to the time slot interference cell number;
s5, configuring measurement resources of channel interference information for the base station of the relevant cell according to the base station measurement resource configuration;
and S6, acquiring channel interference information of the time slot interference cell to the current service cell according to the measurement resource.
Further, as shown in fig. 2, the obtaining the timeslot interfering cell number according to the first transmission information and the second transmission information includes:
s01, obtaining a first uplink and downlink time slot switching node corresponding to first transmission information; s02, obtaining a second uplink and downlink time slot switching node corresponding to second transmission information;
and S03, acquiring the number of the time slot interference cell according to the first uplink and downlink time slot switching node and the second uplink and downlink time slot switching node.
Further, the configuring, according to the base station measurement resource configuration, measurement resources of channel interference information to a base station of a relevant cell includes:
and configuring zero-power channel reference information for the base station of the relevant cell according to the base station measurement resource configuration.
Further, before obtaining the first transmission information transmitted in the current serving cell, the method further includes:
and predefining channel interference type information of each base station for the base stations in each cell, wherein the channel interference type information is used for determining the type of channel interference.
Further, as shown in fig. 3, the determining, according to the timeslot interfering cell number, the measurement resource configuration of the base station of the cell in the same range includes:
s001, obtaining channel interference type information according to the time slot interference cell number;
and S002, determining the base station measurement resource allocation of the cells in the same range according to the channel interference type information.
Further, as shown in fig. 4, the obtaining, according to the measurement resource, channel interference information of the timeslot interfering cell to the current serving cell includes:
s101, measuring the total power received by the current service cell according to the measurement resource;
s102, obtaining user power of a current scheduling user;
and S103, obtaining interference power corresponding to the time slot interference cell according to the total power and the user power.
Specifically, a cluster is formed by a plurality of cells in the same range, each cell includes a base station and a plurality of users, and each user has different uplink and downlink transmission requirements. The ratio of uplink and downlink services of each cell in the cell cluster is different, which results in different ratio of corresponding uplink and downlink time slots. It is assumed that the uplink and downlink timeslot allocation scheme of each cell is not changed in the configuration period of N timeslots.
And signaling information configured by uplink and downlink time slots is interacted between the cells in one cluster through an Xn interface. For the current serving cell, in the same time slot of downlink transmission or downlink transmission, it is only necessary to measure the channel interference information between users generated by the scheduled uplink users of the adjacent cells, and obtain the channel interference information between the base station and the base station generated by the downlink users. Based on the interactive uplink and downlink time slot configuration information, the current serving cell identifies a relevant cell number of channel interference information of the current serving cell in a period formed by N time slots.
In a specific embodiment, it is assumed that there is only one node for switching uplink and downlink services in a radio frame. As shown in fig. 5, assume that for the serving cell, this switching node is at the l0 th time slot, assume that there are M relevant cells for which {1,2, \ 8230;, M }, the corresponding switching node is at the li (i =1,2, \ 8230;, M) th time slot. The embodiment of the invention provides an algorithm, based on the information of a switching point interacted through an Xn interface, a service base station identifies the number of a cell which is likely to generate the channel interference information from a user to the user or the channel interference information from the base station to the base station, and the algorithm is as follows:
inputting: node li (i =0,1,2, \8230;, M) for uplink and downlink traffic switching
And (3) outputting: cell numbers that may result in UE-to-UE CLI or gNB-to-gNB CLI
The UE-to-UE CLI is channel interference information from a user to the user, and the gNB-to-gNB CLI is channel interference information from a base station to the base station.
The method comprises the steps of predefining channel interference type information, wherein the channel interference type information is CL-CSI-IM information. The channel interference type information can obtain base station information for specifically measuring channel interference, and each current service cell can identify and measure the channel interference information of all time slot interference cells to the current service cell.
In a period formed by N time slots, firstly, the number of a time slot interference cell is obtained, and each cell in a cluster of cells is configured with a resource allocation scheme of a specific channel interference resource based on a list of the number of each time slot interference cell. In a specific embodiment, the corresponding algorithm is executed by a central node in the cluster or any base station in a cell in the cluster. The executed central node or the base station needs to obtain the cell numbers of the interfered cells of each serving cell in the first step of the process, and then determines the type of the channel interference information based on the information.
And in each time slot, the determined channel interference information type number is sent to all base stations in the cluster through an Xn interface, and after interference measurement is carried out, the base stations obtain an interference power value and interference source information in the current period according to corresponding configuration. The method of making the interference measurements is as follows.
Based on the channel interference information type number, the cell in the cluster restrains the appointed transmission resource in the transmission period of N time slots, namely, ZP-CSI-RS is configured, and the ZP-CSI-RS is a channel state information reference signal with zero power. Specifically, in the designated transmission resource element of the uplink timeslot of the serving cell, the base station of the current serving cell measures the total received power, and subtracts the signal power of the uplink scheduled user from the total received power, so as to calculate the interference power value received by the base station. Similarly, in the designated transmission resource element of the downlink timeslot of the current serving cell, the scheduling user measures the total received power, and subtracts the signal power of the downlink scheduling user from the total received power, so as to calculate the interference power value received by the user.
In a specific embodiment, as shown in fig. 6, a cluster includes three cells, and different uplink and downlink transmission services are configured in a certain time slot: base station 1 is receiving uplink traffic of user 1 and base stations 2 and 3 are transmitting downlink traffic to users 2 and 3. 4 types of channel interference information are defined, namely CL-CSI-IM # 1, CL-CSI-IM # 2, CL-CSI-IM #3 and CL-CSI-IM #4. In this scenario, a total of four measurement resources are required, and a specific time-frequency resource allocation scheme is as follows:
the CL-CSI-IM # 1 is used to measure the gNB-to-gNB interference from base station 2 to base station 1. In the first resource of CL-CSI-IM # 1, ZP-CSI-RS is configured for the downlink data channel of the base station 3, so that the channel interference measurement between the base station 2 and the base station 1 can be completed.
CL-CSI-IM # 2 is used to measure the gNB-to-gNB interference from base station 3 to base station 1. In the second resource of CL-CSI-IM # 2, ZP-CSI-RS is configured for the downlink data channel of the base station 2, so that the channel interference measurement between the base station 3 and the base station 1 can be completed.
The CL-CSI-IM #3 is used to measure UE-to-UE interference from UE2 to UE 1. In the third resource of CL-CSI-IM #3, ZP-CSI-RS is configured for the downlink data channel of the base station 3, so that the channel interference measurement between the user 1 and the user 2 can be completed.
CL-CSI-IM #4 is used to measure UE-to-UE interference from UE3 to UE 1. In the fourth resource of CL-CSI-IM #4, ZP-CSI-RS is configured for the downlink data channel of the base station 2, so that the channel interference measurement between the user 1 and the user 3 can be completed.
The allocation scheme of the measurement resources is determined by a central node in the cluster or a certain base station according to the input value of the time slot interference cell list. Finally, the determined number of the CL-CSI-IM type is sent to all three base stations in the cluster through the Xn interface. According to the corresponding configuration, three base stations and three scheduling users in the cluster can obtain the interference power and the interference source information of the current period.
The method for measuring the wireless channel interference provided by the embodiment of the invention can meet the remote driving requirements of a plurality of vehicles in an area. When the vehicle is accessed to the 5G Internet of vehicles, a transmission channel with higher speed and lower time delay can be provided for the 5G Internet of vehicles by the method for measuring the wireless channel interference. At the moment, the 5G Radio Access Network (RAN) can efficiently manage the problem of mutual interference of a plurality of uplink and downlink transmission links (UL/DL), and further ensures that the performance of the plurality of links meets the speed and time delay requirements of remote driving.
In the method, only the scheduled user or the base station passively measures the channel interference information generated when the user or the base station is scheduled by the adjacent cell to transmit uplink or downlink data. The method can narrow the range of the measurement user, reduce the measurement resource consumption, and predefine the channel interference type information at the same time, so that all cells in the preset range can obtain the channel interference information and identify the interference source.
Example 2:
in one possible embodiment of the present invention, an apparatus for measuring radio channel interference is provided. Specifically, as shown in fig. 7, the apparatus includes: a first transmission information obtaining module 201, a second transmission information obtaining module 202, a time slot interference cell number obtaining module 203, a measurement resource configuration module 204 and a channel interference calculation module 205;
the first transmission information obtaining module 201 is configured to obtain first transmission information transmitted in a current serving cell;
the second transmission information obtaining module 202 is configured to obtain second transmission information transmitted in a relevant cell within the same range;
the timeslot interference cell number obtaining module 203 is configured to obtain a timeslot interference cell number according to the first transmission information and the second transmission information;
the measurement resource allocation module 204 is configured to determine the base station measurement resource allocation of the cells in the same range according to the timeslot interference cell number, and configure the measurement resource of the channel interference information to the base station of the relevant cell according to the base station measurement resource allocation;
the channel interference calculating module 205 is configured to obtain channel interference information of the time slot interference cell to the current serving cell according to the measurement resource.
Further, as shown in fig. 8, the first transmission information obtaining module 201 includes a first switching node obtaining unit 2001;
the first switching node obtaining unit 2001 is configured to obtain a first uplink and downlink timeslot switching node;
the second transmission information obtaining module 202 includes a second switching node obtaining unit 2002;
the second switching node obtaining unit 2002 is configured to obtain a second uplink and downlink timeslot switching node.
Further, as shown in fig. 9, the measurement resource configuration module 204 includes an interference type obtaining unit 2003, a configuration information determining unit 2004, and a measurement resource configuration subunit 2005;
the interference type obtaining unit 2003 is configured to obtain channel interference type information according to the timeslot interference cell number;
the configuration information determining unit 2004 is configured to determine, according to the channel interference type information, a base station measurement resource configuration of a cell within the same range;
the measurement resource configuration subunit 2005 is configured to configure, according to the base station measurement resource configuration, zero-power channel reference information for a base station of a relevant cell.
Further, as shown in fig. 10, the channel interference calculation module 205 includes a total power obtaining unit 2006, a user power obtaining unit 2007 and an interference power obtaining unit 2008;
the total power obtaining unit 2006 is configured to measure a total power received by the current serving cell according to the measurement resource;
the user power obtaining unit 2007 is configured to obtain the user power of the current scheduling user;
the interference power obtaining unit 2008 is configured to obtain an interference power corresponding to the timeslot interference cell according to the total power and the user power.
Specifically, a cluster is formed by a plurality of cells in the same range, each cell includes a base station and a plurality of users, and each user has different uplink and downlink transmission requirements. The ratio of uplink and downlink services of each cell in the cell cluster is different, which results in different ratio of corresponding uplink and downlink time slots. It is assumed that the uplink and downlink timeslot allocation scheme of each cell is not changed in the configuration period of N timeslots.
And signaling information configured by uplink and downlink time slots is interacted between the cells in the cluster through an Xn interface. For the current serving cell, in the same time slot of downlink transmission or downlink transmission, only the channel interference information between users generated by the scheduled uplink user of the adjacent cell needs to be measured, and the channel interference information between the base station and the base station generated by the downlink user is obtained. Based on the interactive uplink and downlink time slot configuration information, the current serving cell identifies the relevant cell number of the channel interference information of the current serving cell in a period formed by N time slots.
In a specific embodiment, it is assumed that there is only one node for switching uplink and downlink services in a radio frame. As shown in fig. 5, assume that for the serving cell, this switching node is at the l0 th time slot, assume that there are M relevant cells for which {1,2, \ 8230;, M }, the corresponding switching node is at the li (i =1,2, \ 8230;, M) th time slot. The embodiment of the invention provides an algorithm, based on the information of a switching point interacted through an Xn interface, a service base station identifies the number of a cell which is likely to generate the channel interference information from a user to the user or the channel interference information from the base station to the base station, and the algorithm is as follows:
input node Li (i =0,1,2, \8230;, M) for switching between uplink and downlink services
Outputting cell number possibly generating UE-to-UE CLI or gNB-to-gNB CLI
The UE-to-UE CLI is channel interference information from a user to the user, and the gNB-to-gNB CLI is channel interference information from a base station to the base station.
The method comprises the steps of predefining channel interference type information, wherein the channel interference type information is CL-CSI-IM information. The channel interference type information can obtain base station information for specifically measuring channel interference, and each current service cell can identify and measure the channel interference information of all time slot interference cells to the current service cell.
In a period formed by N time slots, firstly, the number of a time slot interference cell is obtained, and based on a list of the number of each time slot interference cell, each cell in a cluster of cells is configured with a specific resource allocation scheme of channel interference resources. In a specific embodiment, the corresponding algorithm is executed by a central node in the cluster or any base station in a cell in the cluster. The executed central node or the base station needs to obtain the cell numbers of the interfered cells of each serving cell in the first step of the process, and then determines the type of the channel interference information based on the information.
And in each time slot, the determined channel interference information type number is sent to all base stations in the cluster through an Xn interface, and after interference measurement is carried out, the base stations obtain an interference power value and interference source information in the current period according to corresponding configuration. The method of making the interference measurements is as follows.
Based on the channel interference information type number, the cell in the cluster restrains the appointed transmission resource in the transmission period of N time slots, namely, a channel state information reference signal ZP-CSI-RS with zero power is configured. Specifically, in the designated transmission resource element of the uplink timeslot of the serving cell, the base station of the current serving cell measures the total received power, and subtracts the signal power of the uplink scheduled user from the total received power, so as to calculate the interference power value received by the base station. Similarly, in the designated transmission resource element of the downlink timeslot of the current serving cell, the scheduling user measures the total received power, and subtracts the signal power of the downlink scheduling user from the total received power, so as to calculate the interference power value received by the user.
In a specific embodiment, as shown in fig. 6, a cluster includes three cells, and different uplink and downlink transmission services are configured in a certain time slot: base station 1 is receiving uplink traffic of user 1 and base stations 2 and 3 are transmitting downlink traffic to users 2 and 3. 4 types of channel interference information are defined, namely CL-CSI-IM # 1, CL-CSI-IM # 2, CL-CSI-IM #3 and CL-CSI-IM #4. In this scenario, a total of four measurement resources are required, and a specific time-frequency resource allocation scheme is as follows:
the CL-CSI-IM # 1 is used to measure the gNB-to-gNB interference from base station 2 to base station 1. In the first resource of CL-CSI-IM # 1, ZP-CSI-RS is configured for the downlink data channel of the base station 3, so that the channel interference measurement between the base station 2 and the base station 1 can be completed.
CL-CSI-IM # 2 is used to measure the gNB-to-gNB interference from base station 3 to base station 1. In the second resource of the CL-CSI-IM # 2, ZP-CSI-RS is configured for the downlink data channel of the base station 2, so that the channel interference measurement between the base station 3 and the base station 1 can be completed.
The CL-CSI-IM #3 is used to measure UE-to-UE interference from UE2 to UE 1. In the third resource of CL-CSI-IM #3, ZP-CSI-RS is configured for the downlink data channel of the base station 3, so that the channel interference measurement between the user 1 and the user 2 can be completed.
CL-CSI-IM #4 is used to measure UE-to-UE interference from UE3 to UE 1. In the fourth resource of CL-CSI-IM #4, ZP-CSI-RS is configured for the downlink data channel of the base station 2, so that the channel interference measurement between the user 1 and the user 3 can be completed.
The allocation scheme of the measurement resources is determined by a central node in the cluster or a certain base station according to the input value of the time slot interference cell list. Finally, the determined number of the CL-CSI-IM type is sent to all three base stations in the cluster through the Xn interface. According to the corresponding configuration, three base stations and three scheduling users in the cluster will obtain the interference power and the interference source information of the current period.
The device for measuring the wireless channel interference provided by the embodiment of the invention can meet the remote driving requirements of a plurality of vehicles in an area. When the vehicle accesses the 5G Internet of vehicles, a transmission channel with higher speed and lower time delay can be provided for the 5G Internet of vehicles through the wireless channel interference measuring device. At this time, the 5G Radio Access Network (RAN) can efficiently manage the problem of mutual interference of a plurality of uplink and downlink transmission links (UL/DL), and further ensure that the performance of the plurality of links meets the speed and time delay requirements of remote driving.
According to the device for measuring the wireless channel interference provided by the embodiment of the invention, only the scheduled user or the base station passively measures the channel interference information generated when the scheduled user or the base station of the adjacent cell transmits uplink or downlink data. The device can narrow the range of measurement users, reduce the consumption of measurement resources, and predefine the channel interference type information at the same time, so that all cells in the preset range can obtain the channel interference information and identify the interference source.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A method for measuring wireless channel interference, the method comprising:
obtaining first transmission information transmitted in a current service cell;
obtaining second transmission information transmitted in the related cells in the same range;
acquiring a first uplink and downlink time slot switching node corresponding to the first transmission information;
obtaining a second uplink and downlink time slot switching node corresponding to the second transmission information;
acquiring the number of each time slot interference cell in the relevant cell according to the first uplink and downlink time slot switching node and the second uplink and downlink time slot switching node;
acquiring channel interference type information according to the time slot interference cell number;
determining the base station measurement resource allocation of cells in the same range according to the channel interference type information;
according to the base station measurement resource configuration, configuring the measurement resource of the channel interference information for the base station of the relevant cell;
and obtaining the channel interference information of the time slot interference cell to the current service cell according to the measurement resource.
2. The method of claim 1, wherein the configuring the measurement resource of the channel interference information for the base station of the relevant cell according to the base station measurement resource configuration comprises:
and configuring channel reference information with zero power for the base station of the relevant cell according to the base station measurement resource configuration.
3. The method of claim 1, wherein before obtaining the first transmission information transmitted in the current serving cell, the method further comprises:
and predefining channel interference type information of each base station for the base stations in each cell, wherein the channel interference type information is used for determining the type of channel interference.
4. The method of claim 1, wherein the obtaining the channel interference information of the timeslot interfering cell to the current serving cell according to the measurement resource comprises:
according to the measurement resource, the current service cell measures the total received power;
obtaining user power of a current scheduling user;
and obtaining the interference power corresponding to the time slot interference cell according to the total power and the user power.
5. An apparatus for measuring wireless channel interference, the apparatus comprising: the system comprises a first transmission information acquisition module, a second transmission information acquisition module, a time slot interference cell number acquisition module, a measurement resource allocation module and a channel interference calculation module;
the first transmission information obtaining module is used for obtaining first transmission information transmitted in the current service cell;
the second transmission information acquisition module is used for acquiring second transmission information transmitted in a relevant cell in the same range;
the time slot interference cell number obtaining module is used for obtaining a first uplink and downlink time slot switching node corresponding to the first transmission information; and a second uplink and downlink time slot switching node for obtaining the second transmission information; the system comprises a first uplink time slot switching node, a second uplink time slot switching node, a first downlink time slot switching node, a second uplink time slot switching node and a second uplink time slot switching node, wherein the first uplink time slot switching node and the second uplink time slot switching node are used for acquiring the number of each time slot interference cell in the related cells;
the measurement resource configuration module comprises an interference type obtaining unit, a configuration information determining unit and a measurement resource configuration subunit;
the interference type obtaining unit is used for obtaining channel interference type information according to the time slot interference cell number;
the configuration information determining unit is used for determining the base station measurement resource configuration of the cells in the same range according to the channel interference type information;
the measurement resource allocation subunit is configured to allocate, according to the base station measurement resource allocation, a measurement resource of channel interference information to a base station of a relevant cell.
6. The apparatus of claim 5, wherein the channel interference calculating module comprises a total power obtaining unit, a user power obtaining unit and an interference power obtaining unit;
the total power obtaining unit is used for measuring the total power received by the current service cell according to the measurement resource;
the user power obtaining unit is used for obtaining the user power of the current scheduling user;
the interference power obtaining unit is used for obtaining the interference power corresponding to the time slot interference cell according to the total power and the user power.
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