CN107769885B - Interference elimination method, base station, terminal and system - Google Patents
Interference elimination method, base station, terminal and system Download PDFInfo
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Abstract
The invention discloses an interference elimination method, a base station, a terminal and a communication system, which relate to the field of communication, wherein the method comprises the following steps: a service base station receives positioning information sent by a terminal or an interference cell identifier needing interference elimination; the service base station determines an interference cell and interference elimination auxiliary information for interference elimination of the terminal according to the positioning information, or acquires the interference elimination auxiliary information according to an interference cell identifier; and the service base station sends the interference elimination indication information to the terminal so that the terminal executes interference elimination based on the interference elimination indication information. The interference elimination method, the base station, the terminal and the communication system are suitable for ultra-dense networking, can adaptively eliminate the interference of the interference cell by serial interference according to the position of a user and the interference situation, can obviously improve the performance in the dense networking scene with a complex interference environment, do not increase the extra complexity of a receiver and have small change on the conventional system.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an interference cancellation method, a base station, a terminal, and a communication system.
Background
The fifth generation mobile phone mobile communication standard, also known as the fifth generation mobile communication technology, abbreviated as 5G, is an extension beyond 4G. It is expected that by 2020 mobile data traffic will increase by 500-fold over 1000-fold in 2010, 5G systems will need a corresponding increase in network capacity to meet the explosive growth demand of data traffic. High-bandwidth applications such as ultra-high-definition videos, mass data sharing, 3D games and the like put higher demands on communication rate. The 5G system needs to support higher data rates to support future large bandwidth services and provide and guarantee a higher, fairer rate experience for each user in the network. The traffic demand in the hot spot area is always an important problem that operators need to solve urgently, and the problem is particularly obvious in the future 5G network. Aiming at the requirement of 500-1000 times increase of mobile data traffic in a future hot spot region, due to the scarcity of low-frequency band spectrum resources, the requirement of the increase of the mobile data traffic cannot be met only by improving the spectrum efficiency. Increasing the density of small base stations in unit area is the most effective means for solving the rapid increase of mobile data traffic in hot spots.
IMT-2020(5G) Propulsion group establishes a ultra-dense networking (UDN) special subject group to carry out key technical research under the ultra-dense networking scene. Interference management has received much attention as one of the three major research directions for this topic group. The ultra-dense networking interference management technology also becomes a very important content of the 3GPP in the research of the project aiming at 5G. The interference management may be performed from the transmitting side or from the receiving side. Compared with the interference suppression and elimination at the sending end, the cost of the receiving end interference elimination receiving technology is lower. In 3GPP Rel-11, an irc (interference Rejection combining) technique for performing interference cancellation at a receiving end is proposed, and after an interference noise covariance matrix is estimated in an indirect manner, the strongest interference from a macro base station to a user is cancelled. The disadvantage is that only the strongest interference experienced is interference suppressed and the available performance gain is affected because the interference noise covariance matrix estimate is not very accurate. The interference suppression receiving scheme naics (network assistance interference Cancellation scheme) proposed in 3gpp rel-12 obtains information related to required interference through partial network assistance, for example: modulation coding scheme, pilot structure, etc. The disadvantage is that only suppression of the strongest interference to the user is supported at present, and the network signaling load is increased due to network assistance, but the performance of interference cancellation is better than that of IRC. The above two receivers defined by 3GPP can only suppress the strongest interference to the user at the receiving end singly. The interference situation under the ultra-dense network deployment scenario for meeting the 5G ultra-high rate requirement in the future becomes more severe and complex, severely impacting the performance gain obtainable with the above conventional schemes.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an interference cancellation method, a base station, a terminal and a communication system.
According to an embodiment of the present invention, there is provided an interference cancellation method including: a service base station receives positioning information sent by a terminal or an interference cell identifier needing interference elimination; the service base station determines an interference cell and interference elimination auxiliary information for the terminal to carry out interference elimination according to the positioning information, or acquires the interference elimination auxiliary information according to the interference cell identification; the service base station transmits interference elimination indication information to the terminal so that the terminal executes interference elimination based on the interference elimination indication information; the interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination.
Optionally, the receiving, by the serving base station, the positioning information sent by the terminal or the interfering cell identifier that needs to perform interference cancellation includes: the terminal obtains the interference signal power of the interference cell by measuring the reference signal power of the interference cell; the terminal determines an interference cell and a cell ID which need to be subjected to interference elimination according to the interference signal power; and the terminal uploads the cell ID to a service base station.
Optionally, the determining, by the terminal, an interfering cell and a cell ID that need to perform interference cancellation according to the interfering signal power includes: the terminal calculates the ratio of each interference signal power to the total of all interference signal powers to obtain the interference signal power ratio of each interference cell; and the terminal matches the interference signal power ratio with a preset threshold rule, and determines the number of interference cells and cell IDs (identities) needing interference elimination according to a matching result.
Optionally, the step of matching, by the terminal, the interference signal power ratio with a preset threshold rule, and determining the number of interfering cells and the cell ID of the interfering cells that need to eliminate interference according to a matching result includes: n power thresholds exist in a threshold value group preset by the terminal, and the n power thresholds are sequenced according to the sequence of the values; the terminal sorts the interference signal power ratios according to the numerical order and extracts the first n interference signal power ratios; comparing the interference signal power ratio with a power threshold value with the same sequence number in sequence from the largest interference signal power ratio in the first n interference signal power ratios; and when the interference signal power ratio is judged to be larger than the power threshold value with the same sequence number, stopping comparison, determining the interference cell corresponding to the interference signal power ratio which is compared as the interference cell needing interference elimination, and acquiring the corresponding cell ID.
Optionally, the receiving, by the serving base station, the positioning information sent by the terminal or the interfering cell identifier that needs to perform interference cancellation includes: the terminal sends the position information to the service base station through uplink signaling; the positioning method adopted by the terminal comprises the following steps: OTDOA, GNSS.
Optionally, the determining, by the serving base station according to the positioning information, an interference cell for performing interference cancellation by the terminal and the interference cancellation assistance information include: the service base station determines an interference cell for interference elimination of the terminal and an interference base station corresponding to the interference cell according to the position information; and the service base station acquires the interference elimination auxiliary information for the interference elimination of the terminal through an interface with the interference base station.
According to another aspect of the present invention, there is provided a terminal comprising: the interference power acquisition module is used for acquiring the interference signal power of the interference cell by measuring the reference signal power of the interference cell; an interference cell determining module, configured to determine an interference cell and a cell ID that need to perform interference cancellation according to the interference signal power; an information uploading module, configured to upload the cell ID to a serving base station; the interference executing module is used for executing interference elimination based on the interference elimination indication information issued by the service base station; the interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination.
Optionally, the interfering cell determining module is configured to calculate a ratio of each interfering signal power to a sum of all interfering signal powers, so as to obtain an interfering signal power ratio of each interfering cell; and matching the interference signal power ratio with a preset threshold rule, and determining the number of interference cells and cell IDs (identities) needing to eliminate interference according to a matching result.
Optionally, the interfering cell determining module includes: the threshold setting unit is used for presetting n power thresholds in the threshold value group, and the n power thresholds are sequenced according to the high-low sequence of the values; the power ratio sorting unit is used for sorting the interference signal power ratios according to the numerical sequence and extracting the first n interference signal power ratios; a cell determining unit, configured to compare the interference signal power ratio with a power threshold value having the same sequence number in sequence starting from the largest interference signal power ratio among the first n interference signal power ratios; and when the interference signal power ratio is judged to be larger than the power threshold value with the same sequence number, stopping comparison, determining the interference cell corresponding to the interference signal power ratio which is compared as the interference cell needing interference elimination, and acquiring the corresponding cell ID.
Optionally, the information uploading module is configured to send the location information to the serving base station through an uplink signaling; the positioning method adopted by the terminal comprises the following steps: OTDOA, GNSS; and the service base station determines an interference cell for interference elimination of the terminal and interference elimination auxiliary information according to the positioning information.
According to still another aspect of the present invention, there is provided a base station including: the information acquisition module is used for receiving positioning information sent by a terminal or an interference cell identifier needing interference elimination; an interference determining module, configured to determine, according to the positioning information, an interference cell and interference cancellation auxiliary information for performing interference cancellation by the terminal, or obtain the interference cancellation auxiliary information according to the interference cell identifier; an information issuing unit, configured to issue interference cancellation indication information to the terminal, so that the terminal performs interference cancellation based on the interference cancellation indication information; the interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination.
Optionally, the interference determining module is further configured to determine, according to the location information, an interference cell where the terminal performs interference cancellation and an interference base station corresponding to the interference cell; and acquiring interference elimination auxiliary information for interference elimination of the terminal through an interface with the interference base station.
According to still another aspect of the present invention, there is provided a communication system including: a terminal as described above, a base station as described above.
The interference elimination method, the base station, the terminal and the communication system can adaptively eliminate the interference of the serial interference elimination interference cell according to the user position and the interference situation, execute 1 or more interference elimination operations according to the user position and the interference situation, and can obviously improve the performance under the intensive networking scene with a complex interference environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart illustrating an embodiment of an interference cancellation method according to the present invention;
fig. 2 is a flowchart illustrating an interference cancellation method according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating an interference cancellation method according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of analysis of an overall downlink interference level of an ultra-dense networking;
FIG. 5 shows the interference of users at different positions in an ultra-dense networking scenario;
fig. 6 is a block diagram of an embodiment of a terminal according to the present invention;
fig. 7 is a block diagram of an interfering cell determining module in an embodiment of a terminal according to the present invention;
fig. 8 is a block diagram of a base station according to an embodiment of the present invention.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The technical solution of the present invention is described in various aspects below with reference to various figures and embodiments.
Fig. 1 is a flowchart illustrating an interference cancellation method according to an embodiment of the present invention, as shown in fig. 1:
The interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination, and the interference elimination auxiliary information comprises: the terminal demodulates and decodes the interference signal of the interfering cell, and removes the interference signal component from the received signal by using the processing gain of the receiver.
The interference elimination method in the embodiment is particularly suitable for a scene of ultra-dense networking, and can adaptively eliminate the interference of the interference cell to the downlink channel according to the user position and the interference situation.
The terminal obtains the interference signal power of the interference cell by measuring the reference signal power of the interference cell, determines the interference cell and the cell ID (physical cell identity) such as PCI (physical cell identity) which need to be subjected to interference elimination according to the interference signal power, and uploads the cell ID to the serving base station.
And the terminal calculates the ratio of the power of each interference signal to the sum of all the interference signal powers to obtain the interference signal power ratio of each interference cell. And the terminal matches the interference signal power ratio with a preset threshold rule and determines the number of interference cells and cell IDs (identities) needing to eliminate interference according to a matching result.
There are n power thresholds in the threshold value set preset by the terminal, and the n power thresholds are sorted in the order of the values, where n may be set according to the system, for example, n is 3, 4, 5, etc. And the terminal sorts the interference signal power ratios according to the numerical order and extracts the first n interference signal power ratios.
And comparing the interference signal power ratio with the power threshold value with the same sequence number in sequence from the maximum interference signal power ratio in the former n interference signal power ratios. And when the interference signal power ratio is judged to be larger than the power threshold value with the same sequence number, stopping comparison, determining the interference cell corresponding to the interference signal power ratio which is compared as the interference cell needing interference elimination, and acquiring the corresponding cell ID.
Fig. 2 is a flowchart illustrating an interference cancellation method according to another embodiment of the present invention, as shown in fig. 2:
In step 202, the ue calculates the ratio of the first 3 interference signals in the set I to the total interference signal, and the ratio of the interference signal power is DIP { DIP1, DIP2, DIP3 }.
In step 203, the user terminal compares the DIP value with the threshold value set Th ═ Th1, Th2, Th3, and determines the number of interference cancellations, and records the number as parameter N.
For example, there are 3 power thresholds Th1, Th2, Th3 in the threshold value group preset by the terminal, and the 3 power thresholds Th1, Th2, Th3 are sorted in the order of the values, as shown in table 1 below:
| interference signal power ratio DIP | Number of interference cancellations N |
| DIP1>Th1(65％) | 1 |
| DIP1<Th1,DIP2>Th2(30％) | 2 |
| DIP1<Th1,DIP2<Th2,DIP3>Th3(20％) | 3 |
| … | … |
TABLE 1 interference cancellation number judgment schematic table
From the maximum interference signal power ratio DIP1, the interference signal power ratio is compared with the power threshold value with the same serial number, that is, DIP1 is compared with Th1, DIP2 is compared with Th2, and DIP3 is compared with Th 3. And when the interference signal power ratio is judged to be larger than the power threshold value with the same sequence number, stopping comparison, determining the interference cell corresponding to the interference signal power ratio which is compared as the interference cell needing interference elimination, and acquiring the corresponding cell ID.
As shown in table 1, if DIP1 is greater than Th1, the comparison is stopped, and the interfering cell corresponding to the interference signal power ratio DIP1 that has been compared is determined as the interfering cell that needs to cancel interference, and the corresponding cell ID is acquired, then the number of interfering cells that perform interference cancellation is 1.
When DIP1 is smaller than Th1, DIP2 is compared with Th2, if DIP2 is larger than Th2, the comparison is stopped, interference cells corresponding to the interference signal power ratio DIP1 and DIP2 which are compared are determined as interference cells needing interference elimination, and corresponding cell IDs are acquired, and the number of the interference cells needing interference elimination is 2.
When DIP1 is smaller than Th1, DIP2 is compared with Th2, if DIP2 is smaller than Th2, DIP3 is compared with Th3, if DIP3 is larger than Th3, the interference cell corresponding to the power ratio of the interference signal which has been compared to DIP1, DIP2 and DIP3 is determined as the interference cell which needs to eliminate interference and the corresponding cell ID is obtained, and the number of interference cells which need to eliminate interference is 3. If DIP3 is smaller than Th3, it is not possible to determine the interfering cell that needs to perform interference cancellation, and the interfering cell ID is not reported to the serving base station.
In step 205, the serving base station informs the user of the acquired information of the interfering cell through a downlink signaling, for example, an interfering signal modulation and coding scheme.
In step 206, the user performs interference cancellation according to the number N of interference cancellations and the network-assisted interfering cell information.
The terminal sends the position information to the service base station through uplink signaling, and the positioning method adopted by the terminal comprises the following steps: OTDOA (Observed Time Difference of Arrival), GNSS (Global navigation satellite System), and the like. The serving base station determines, according to the location information, an interference cell where the terminal performs interference cancellation and an interference base station corresponding to the interference cell, for example, the serving base station obtains, through an interface with the interference base station, interference cancellation auxiliary information where the terminal performs interference cancellation.
Fig. 3 is a flowchart illustrating an interference cancellation method according to another embodiment of the present invention, as shown in fig. 3:
step 301, the user terminal uses technologies such as OTDOA/GNSS to perform positioning, and sends the position to the serving base station through uplink signaling.
Step 302, the serving base station determines the number of interference cells where the interference of the user terminal receiver is eliminated according to the received position of the user terminal, and records the number as a parameter N.
The service base station determines an interference cell according to the position of the user terminal and a topological structure of a wireless network deployed at the position of the user terminal, determines an interference base station, and exchanges information between the service base station and the interference base station, for example, the service base station and the interference base station exchange information through an S1 interface or an X2 interface, to obtain control information and a channel state of a Physical Downlink Control Channel (PDCCH) of the interference base station.
In one embodiment, as can be seen from simulation results, the percentage of the strongest interference DIP1 in the conventional network is usually 60% to 80%, the percentage of the strongest interference in the ultra-dense networking scenario is significantly reduced to 30% to 40%, and many interference sources exist, as shown in fig. 4. The interference situation of users at different positions under the ultra-dense networking scene is greatly different. The interference situation of the edge user is the most serious, which is reflected in that the strongest interference ratio is small, and the difference between adjacent strong interferences is small; the interference situation of the users of 50% -tile of cell geometry is obviously better than that of 95% -tile users, as shown in fig. 5.
The interference elimination method of the embodiment is suitable for a scene of ultra-dense networking, can adaptively eliminate the interference of a downlink channel of an interference cell by serial interference according to the position of a user and the interference condition, and executes 1 or more interference elimination operations according to the position of the user and the interference condition, can obviously improve the performance in a dense networking scene with a complex interference environment, does not increase the extra complexity of a receiver, and has small change on the existing system.
In one embodiment, as shown in fig. 6, the present invention provides a terminal 40 comprising: an interference power obtaining module 41, an interfering cell determining module 42 and an information uploading module 43. The interference power obtaining module 41 obtains the interference signal power of the interfering cell by measuring the reference signal power of the interfering cell.
The interfering cell determining module 42 determines the interfering cell and the cell ID that need to be interference-cancelled according to the interfering signal power. The information upload module 43 uploads the cell ID to the serving base station. The interference executing module 43 executes interference elimination based on interference elimination indication information issued by the serving base station, where the interference elimination indication information carries interference cell information and interference elimination auxiliary information that need to be interference eliminated.
The information uploading module 44 sends the location information to the serving base station through uplink signaling, and the positioning method adopted by the terminal includes: OTDOA, GNSS, etc. And the service base station determines an interference cell for interference elimination of the terminal and interference elimination auxiliary information according to the positioning information.
The interfering cell determining module 42 calculates a ratio of each interfering signal power to a total of all interfering signal powers to obtain an interfering signal power ratio of each interfering cell, matches the interfering signal power ratio with a preset threshold rule, and determines the number of interfering cells and cell IDs that need to eliminate interference according to a matching result.
As shown in fig. 7, the interfering cell determining module 42 includes: a threshold setting unit 421, a power ratio sorting unit 422, and a cell determination unit 423. The threshold setting unit 421 presets n power thresholds in the threshold value group, and the n power thresholds are sorted in the order of magnitude. The power ratio sorting unit 422 sorts the interference signal power ratios in order of magnitude, and extracts the first n interference signal power ratios.
The cell determining unit 423 sequentially compares the interference signal power ratio with the power threshold value having the same sequence number from the largest interference signal power ratio of the first n interference signal power ratios, and when it is determined that the interference signal power ratio is greater than the power threshold value having the same sequence number, the cell determining unit 423 stops the comparison, determines the interference cell corresponding to the compared interference signal power ratio as the interference cell requiring interference elimination, and obtains the corresponding cell ID.
In one embodiment, as shown in fig. 8, the present invention provides a base station 50, including: an information acquisition module 51, an interference determination module 52 and an information issuing unit 53. The information obtaining module 51 receives the positioning information sent by the terminal or the interfering cell identifier that needs to perform interference cancellation. The interference determining module 52 determines an interference cell where the terminal performs interference cancellation and interference cancellation auxiliary information according to the positioning information, or obtains the interference cancellation auxiliary information according to an interference cell identifier.
The information issuing unit 53 issues interference cancellation instruction information to the terminal so that the terminal performs interference cancellation based on the interference cancellation instruction information; the interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination.
The interference determining module 52 determines an interference cell where the terminal performs interference cancellation and an interference base station corresponding to the interference cell according to the position information, and acquires interference cancellation auxiliary information where the terminal performs interference cancellation through an interface with the interference base station.
In one embodiment, the present invention provides a communication system including the above terminal and the above base station.
The interference elimination method, the base station, the terminal and the communication system provided by the embodiment are suitable for a scene of ultra-dense networking, can adaptively eliminate the interference of the interference cell by serial interference according to the position of a user and the interference condition, and execute 1 or more interference elimination operations according to the position of the user and the interference condition, can obviously improve the performance under the dense networking scene with a complex interference environment, does not increase the extra complexity of a receiver, and has small change on the existing system.
The method and system of the present invention may be implemented in a number of ways. For example, the methods and systems of the present invention may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. An interference cancellation method, comprising:
a service base station receives an interference cell identifier which is sent by a terminal and needs to be subjected to interference elimination;
the terminal obtains the interference signal power of the interference cell by measuring the reference signal power of the interference cell, and calculates the ratio of each interference signal power to the total interference signal power to obtain the interference signal power ratio of each interference cell;
n power thresholds exist in a preset threshold value group, and the n power thresholds are sorted according to the numerical value high-low sequence, wherein n > is 2;
the terminal sorts the interference signal power ratios according to the numerical order and extracts the first n interference signal power ratios;
comparing the interference signal power ratio with a power threshold value with the same sequence number in sequence from the largest interference signal power ratio in the first n interference signal power ratios;
when the interference signal power ratio is judged to be larger than the power threshold value with the same serial number, the comparison is stopped, the interference cell corresponding to the interference signal power ratio which is compared is determined as the interference cell needing interference elimination, and the corresponding cell ID is obtained;
the terminal uploads the cell ID to the serving base station;
the service base station acquires interference elimination auxiliary information according to the interference cell identification;
the service base station transmits interference elimination indication information to the terminal so that the terminal executes interference elimination based on the interference elimination indication information;
the interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination.
2. The method of claim 1, further comprising:
the terminal sends the position information to the service base station through uplink signaling;
the positioning method adopted by the terminal comprises the following steps: OTDOA, GNSS.
3. The method of claim 2, further comprising:
the service base station determines an interference cell for interference elimination of the terminal and an interference base station corresponding to the interference cell according to the position information;
and the service base station acquires the interference elimination auxiliary information for the interference elimination of the terminal through an interface with the interference base station.
4. A terminal, comprising:
the interference power acquisition module is used for acquiring the interference signal power of the interference cell by measuring the reference signal power of the interference cell;
an interference cell determining module, configured to determine an interference cell and a cell ID that need to perform interference cancellation according to the interference signal power;
the interference cell determining module is configured to calculate a ratio of each interference signal power to a sum of all interference signal powers, so as to obtain an interference signal power ratio of each interference cell; matching the interference signal power ratio with a preset threshold rule, and determining the number of interference cells and cell IDs (identities) needing interference elimination according to a matching result;
the interfering cell determining module includes:
the threshold setting unit is used for presetting n power thresholds in the threshold value group, and the n power thresholds are sequenced according to the high-low sequence of numerical values, wherein n > is 2;
the power ratio sorting unit is used for sorting the interference signal power ratios according to the numerical sequence and extracting the first n interference signal power ratios;
a cell determining unit, configured to compare the interference signal power ratio with a power threshold value having the same sequence number in sequence starting from the largest interference signal power ratio among the first n interference signal power ratios; when the interference signal power ratio is judged to be larger than the power threshold value with the same serial number, the comparison is stopped, the interference cell corresponding to the interference signal power ratio which is compared is determined as the interference cell needing interference elimination, and the corresponding cell ID is obtained;
an information uploading module, configured to upload the cell ID to a serving base station;
the interference executing module is used for executing interference elimination based on the interference elimination indication information issued by the service base station; the interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination.
5. The terminal of claim 4, wherein:
the information uploading module is used for sending the position information to the service base station through uplink signaling;
the positioning method adopted by the terminal comprises the following steps: OTDOA, GNSS; and the service base station determines an interference cell for interference elimination of the terminal and interference elimination auxiliary information according to the position information.
6. A base station, comprising:
the information acquisition module is used for receiving an interference cell identifier which is sent by a terminal and needs to be subjected to interference elimination;
the terminal obtains the interference signal power of the interference cell by measuring the reference signal power of the interference cell; the terminal calculates the ratio of each interference signal power to the total of all interference signal powers to obtain the interference signal power ratio of each interference cell;
n power thresholds exist in a preset threshold value group, and the n power thresholds are sorted according to the numerical value high-low sequence, wherein n > is 2;
the terminal sorts the interference signal power ratios according to the numerical order and extracts the first n interference signal power ratios;
comparing the interference signal power ratio with a power threshold value with the same sequence number in sequence from the largest interference signal power ratio in the first n interference signal power ratios;
when the interference signal power ratio is judged to be larger than the power threshold value with the same serial number, the comparison is stopped, the interference cell corresponding to the interference signal power ratio which is compared is determined as the interference cell needing interference elimination, and the corresponding cell ID is obtained;
the terminal uploads the cell ID to a serving base station;
an interference determining module, configured to obtain interference cancellation assistance information according to the interfering cell identifier;
an information issuing unit, configured to issue interference cancellation indication information to the terminal, so that the terminal performs interference cancellation based on the interference cancellation indication information;
the interference elimination indication information carries interference cell information and interference elimination auxiliary information which need to be subjected to interference elimination.
7. The base station of claim 6, wherein:
the interference determining module is further configured to determine, according to the positioning information sent by the terminal, an interference cell where the terminal performs interference cancellation and an interference base station corresponding to the interference cell; and acquiring interference elimination auxiliary information for interference elimination of the terminal through an interface with the interference base station.
8. A communication system, comprising:
the terminal according to claim 4 or 5, the base station according to claim 6 or 7.
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