CN110809272A - 5G interference-based macro-micro base station cooperative frequency reuse method - Google Patents
5G interference-based macro-micro base station cooperative frequency reuse method Download PDFInfo
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Abstract
The invention provides a 5G interference-based macro-micro base station cooperative frequency reuse method, which comprises the following steps: step 1, establishing a system processing unit; step 2, the system processing unit determines a cell center user and a cell edge user according to a cell edge defining method, and allocates all N bandwidths to the cell center user and the cell edge user; and 3, the system processing unit sends a command of increasing or decreasing the bandwidth to the macro-micro base station according to the signal-to-interference-plus-noise ratio of the common reference signal. The method is simple to realize, is suitable for being applied to any area of the existing network, and is particularly suitable for areas with serious interference, damaged cellular structures and ultra-density networking such as CBD (communication based device)/dense urban areas and the like. The contradiction between the improvement of the spectrum efficiency and the reduction of the realization complexity can be well solved.
Description
Technical Field
The invention belongs to the technical field of mobile communication, and particularly relates to a 5G interference-based macro-micro base station cooperative frequency reuse method.
Background
Currently, there is no effective frequency reuse scheme specifically designed for 5G networks, and the mainstream 5G frequency reuse scheme still continues to use the LTE frequency reuse scheme based on cellular networks. Existing LTE frequency reuse schemes mainly include Fractional Frequency Reuse (FFR), and Soft Frequency Reuse (SFR), which is further classified into basic SFR and enhanced SFR.
1. Fractional Frequency Reuse (FFR)
For the LTE system, a unique OFDMA access method is adopted, so that users in the cell do not interfere with each other, and users at the edge of the cell receive strong interference from other cells. The core idea of partial frequency reuse is to treat the users at the cell center and the cell edge differently, and for the user at the cell center, because the distance from the user to the base station is relatively short, the channel condition is better, and the interference to other cells is not large, the user can be allocated on the reuse set with the frequency reuse factor of 1. For the users at the edge of the cell, the users are far away from their own serving base station, the channel condition is poor, but the interference to the signals of other cells in the same frequency is large, so they are allocated on the frequency reuse set with the frequency reuse factor of 3, as shown in fig. 1.
The fixed frequency reuse pattern may include the following two patterns:
(1) using 40MHz spectrum, dividing into 4 10MHz bands, and allocating as shown in fig. 2;
the actual available spectrum for each cell is 20 MHz. Two cells can use continuous 20MHz bandwidth (f1+ f2 cell, f1+ f3 cell), and the other cell can only use 2 separated 10MHz bandwidth (f1+ f4 cell), and the spectrum configuration mode is complex.
(2) Using 20MHz spectrum, the interior is divided into 4 sub-bands of 5MHz, which are allocated as shown in fig. 3;
under the frequency width of 20MHz of each cell, the actual available frequency width of a weak signal area at the edge of the cell is 5MHz, and the actual available frequency spectrum of a strong signal area in the cell is 10 MHz.
2. Soft Frequency Reuse (SFR)
The soft frequency reuse inherits the advantages of partial frequency reuse, and meanwhile, the utilization efficiency of the frequency is obviously improved by adopting a dynamic frequency reuse factor. In soft frequency reuse, all frequency bands are divided into two groups of subcarriers, one group is called primary subcarriers, and the other group is called secondary subcarriers. The primary subcarriers may be used anywhere in the cell, while the secondary subcarriers may only be used in the center of the cell. The main subcarriers among different cells are mutually orthogonal, so that interference is effectively inhibited at the edge of the cell, and the auxiliary subcarriers are only used at the center of the cell, so that the interference among the auxiliary subcarriers is small, and the same frequency can be used.
(1) Basic SFR
Under the bandwidth of 20MHz, dividing 3 6.67MHz frequency bands as main subcarriers for the edges of 3 adjacent cells to use one frequency band; while the central area of each cell uses the additional 2/3 spectrum of the cell, as shown in figure 4.
In this way, the available spectrum of 2/3 is used at the center of the cell and 1/3 is used at the edge of the cell.
(2) Enhanced SFR
Although the soft frequency reuse has been considered for the suppression of the cell edge interference and the flexible allocation of subcarriers, the orthogonal primary subcarriers allocated to different cells still cause a certain waste of resources, and especially when the traffic at the cell edge is large, the results of increased frequency reuse factor between cells, decreased spectrum utilization rate, and the like are caused. The enhanced soft frequency reuse scheme inherits the traditional soft frequency reuse idea and is improved on the basis of the traditional soft frequency reuse scheme, and the problem of resource waste possibly brought by traffic change is mainly solved.
Under the 20MHz spectrum, 3 frequency bands are divided as main subcarriers, and at the same time, the 20MHz frequency band is used as a secondary subcarrier only in the center of the cell, as shown in fig. 5 and fig. 6;
not only the occupied bandwidths of f2, f3 and f4 are dynamically adjusted according to the traffic of the edge area of each cell, but also the available frequency spectrum of the center area of each cell can reach 20MHz according to the size of the traffic.
The improved SFR adopts a dynamic configuration mode, and needs to know the load information of surrounding cells, so that the improved SFR needs to be used with an ICIC (inter-cell interference coordination) technology to achieve a good effect.
The prior art application is analyzed as follows:
1. the existing frequency reuse scheme does not aim at the problem of new interference caused by 5G ultra-density networking
The 5G coverage area is mainly a dense urban area such as a core business district and the like and is used for capacity absorption in hot spot areas, available station sites in the areas are basically established, and then macro stations are difficult to increase, while for a 5G network adopting a 3.5G/4.9G high frequency band, the coverage range of a single station is small, a traditional macro station cannot be continuously covered, the 5G network can be networked in a mode of the macro station and a large number of micro stations, the macro station is encrypted to a certain degree on the basis of networking established by the same station site with 4G 1:1, and coverage holes in the macro station are subjected to blind supplement and heat supplement by the large number of micro stations. The networking architecture of the micro-stations is similar to the distribution of 'drip irrigation stations', the original cellular structure of the LTE base station based on three sectors is seriously damaged, and the macro-micro stations and the micro-stations can have serious interference. And because the frequency band of 5G is high, the penetration ability is weak, the coverage area is small, and the original 5G network structure can be influenced by slight changes of the environment (such as newly stopping a bus around, newly building an advertisement platform and the like). Therefore, the existing LTE frequency reuse schemes based on the cellular network cannot well solve the problem of frequency interference of the 5G network.
In a 5G environment, both Fractional Frequency Reuse (FFR) and basic SFR are fixed frequency allocation schemes (the basic SFR also only changes the power ratio), in actual networking, users are mobile, and the traffic distribution may be highly unbalanced, so that it is necessary to adapt to the actual situation through dynamic frequency allocation. In addition, the base stations are frequently added/removed in the 5G super-density networking, and the network structure is greatly influenced by environmental changes, and when the base stations are added/removed, the frequency allocation scheme of the base stations needs to be readjusted, so that the workload of operators is greatly increased, and meanwhile, the adjustment cannot be made according to the change of the network structure, and the interference is serious.
The enhanced soft frequency reuse is an improved mode of the soft frequency reuse, reduces interference to a certain extent, and improves the spectrum utilization efficiency, but the complexity of a base station antenna and the calculation amount of a scheduler are greatly increased, so that the LTE current network is not deployed and applied. In addition, the enhanced SFRs (including partial frequency reuse and basic SFRs) are all constructed based on an ideal cellular structure, the single-station coverage of a 5G network is small, a large number of micro base stations are deployed, the cellular structure is seriously damaged, and signals of more than 4 base stations in many areas (especially areas with dense buildings, such as CBDs) exist at the moment, so that serious co-frequency interference exists.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the technical problems in the background art, the invention provides a 5G interference-based macro-micro base station cooperative frequency reuse method, which comprises the following steps:
step 1, establishing a system processing unit;
step 2, the system processing unit determines a cell center user and a cell edge user according to a cell edge defining method, and allocates all N bandwidths to the cell center user and the cell edge user;
and 3, the system processing unit sends a command of increasing or decreasing the bandwidth to the macro base station and the micro base station according to the signal to interference plus noise ratio of the common reference signal.
The step 1 comprises the following steps: and establishing a system processing unit, wherein the system processing unit is a system module for distributing bandwidth to cell edge users by the 5G system, and the system module is integrated in a core network, a base station or BBU (base band unit) equipment.
The step 2 comprises the following steps: taking far point indexes of a near point, a middle point and a far point which are acknowledged in the industry as a threshold value, or taking an RS-SINR or RSRP value specified by an operator as the threshold value, wherein the RS-SINR represents the signal-to-interference-plus-noise ratio of a common reference signal, the RSRP represents the receiving power of the reference signal, users in an area with the signal index smaller than the threshold value are cell edge users, and users in other areas are cell center users; the network single-carrier bandwidth of the 5G system is N, and the system processing unit distributes the whole N bandwidth to the cell center user and the cell edge user.
The step 3 comprises the following steps: dividing all frequency spectrums f1 of a 5G system into two sub-frequency spectrums f2 and f3, wherein f2 is a macro base station bottom-preserving sub-frequency spectrum, f3 is a micro base station bottom-preserving sub-frequency spectrum, X is an initial frequency, and N0 is a value for distinguishing the macro base station bottom-preserving sub-frequency spectrum and the micro base station bottom-preserving sub-frequency spectrum; when the average RS-SINR value of cell edge users under the coverage of the macro base station is continuously smaller than A in T2 time, randomly reducing the bandwidth B on f3 by the cell edge users under the coverage of the macro base station until the macro base station only has the bandwidth f 2; f3 ranges from X + N0 to X + N; meanwhile, the bandwidth B of the macro base station adjacent micro base station is randomly reduced on f2 until the macro base station adjacent micro base station only has the bandwidth f 3; f2 ranges from X to X + N0;
when the average RS-SINR value of the macro base station edge user is continuously larger than or equal to A in T2 time, the macro base station randomly increases the bandwidth B on f3, and the adjacent micro base stations randomly increase the bandwidth B on f 2;
when the RS-SINR or RSRP value of a cell edge user is continuously larger than a threshold value in T1 time, the system changes the user attribute into a cell center user and always allocates all N bandwidth for the user;
when the RS-SINR or RSRP value of a cell center user is continuously smaller than the threshold value in T1 time, the system changes the user attribute into a cell edge user and always allocates the whole N bandwidth for the user.
In step 3, the relationship between the macro base station and the micro base station is as follows: the micro base stations are mutually allocated to adjacent macro base stations, one micro base station can be adjacent to more than two macro base stations, and when one micro base station receives the instruction for increasing the bandwidth and reducing the bandwidth from the system processing unit at the same time (because some micro base stations can be adjacent to more than two macro base stations, the instruction for increasing the bandwidth may be sent by one macro base station, and the instruction for reducing the bandwidth is sent by the other macro base station), the micro base station executes the instruction for reducing the bandwidth.
The proposal of the application has the following technical advantages:
1. is suitable for 5G network architecture and reduces network interference
The 5G networking architecture is similar to the "drip irrigation station" distribution, and the original LTE cellular structure based on the three-sector base station is seriously damaged. And because the frequency band of 5G is high, the penetration ability is weak, the coverage area is small, and the original 5G network structure can be influenced by slight changes of the environment (such as newly stopping a bus around, newly building an advertisement platform and the like). According to the method, the macro-micro base stations respectively adopt different bottom-preserving sub-frequency spectrums, and do not depend on a honeycomb structure, so that the interference among the macro-micro base stations can be well avoided in an irregular network structure.
2. Dynamically adjusting spectrum
The method can dynamically adjust the frequency spectrum according to the signal condition of the user, so that the center user of the cell with better signals distributes all the frequency spectrum, the peak value throughput of the cell with high service demand is improved, and the user perception is improved; and the cell edge users with poor signals allocate corresponding sub-frequency spectrums according to the interference condition, so that the interference between macro and micro cells is reduced.
3. Low complexity of implementation
Compared with the enhanced SFR which needs multi-base station coordination processing, the method only needs to consider the user network condition of the cell and does not need to consider the network condition of the adjacent cell, so the method has lower realization complexity and less change to the network.
4. The existing network has strong applicability
The method is simple to realize, is suitable for being applied to any area of the existing network, and is particularly suitable for areas with serious interference, damaged cellular structures and ultra-density networking such as CBD (communication based device)/dense urban areas and the like. The contradiction between the improvement of the spectrum efficiency and the reduction of the realization complexity can be well solved.
5. Convenient network operation and maintenance
The method of the invention is simple to realize, each macro base station only needs to collect and monitor the traffic in the cell, the base stations do not need to cooperate, parameters do not need to be modified under the condition of network change such as frequent increase/removal of the base stations in the 5G network, and the network operation and maintenance are very convenient.
Drawings
The foregoing and/or other advantages of the invention will become further apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic diagram of partial frequency reuse.
Fig. 2 shows a first fractional division scheme for frequency division multiplexing.
Fig. 3 shows a second fractional division scheme.
Fig. 4 is a schematic diagram of basic soft frequency reuse.
Fig. 5 is a schematic diagram of an enhanced SFR.
Fig. 6 is a schematic diagram of enhanced soft frequency reuse.
Fig. 7 is a macro-micro base station cooperative frequency reuse method based on interference of the present invention.
Fig. 8 is a schematic view of an embodiment of the present invention.
Detailed Description
In the actual situation of 5G network deployment, a frequency allocation scheme capable of reducing macro and micro base station interference needs to be adopted, but the existing enhanced SFR is based on an ideal cellular structure and is too complex, so that the problem of 5G network interference cannot be well solved. Therefore, a frequency reuse scheme with relatively simple complexity and capable of cooperating with macro-micro base station interference is required to be provided for the 5G network characteristics.
As shown in fig. 7, the method for multiplexing the 5G macro-micro base station and the frequency based on interference provided by the present application can effectively reduce interference of edge users of the 5G network.
(1) Principle of the scheme
All the frequency spectrum f1 is divided into two sub-spectra f2 and f 3. In actual network operation, all frequency spectrums are distributed to users in the center of a base station sector (an area with better signal of the cell and less interference to other cells) so as to increase the overall throughput of the sector.
In the base station sector edge region (the region with poor signal of the cell and serious interference to other cells), all frequency spectrums f1 are distributed to users, the frequency spectrums used by the users in the edge region are gradually reduced along with the interference improvement, the macro station reduces the sub frequency spectrums of non-f 2, and the micro base stations adjacent to the macro station reduce the sub frequency spectrums of non-f 3. In extreme cases, the macro base station only uses f2, and the micro base station only uses f3, so that the frequency spectrums of the edge users of the macro and micro base stations are completely staggered, and the mutual interference of the macro and micro base stations is reduced.
(2) Detailed description of the protocol
The bandwidth of a network single carrier is expected to be N, the frequency spectrum is f1, the bottom-preserved sub-spectrum of the macro station is f2, the bottom-preserved sub-spectrum of the micro base station adjacent to the macro station is f3, the cell structure is a macro base station (omni-directional or tri-sector) or a tri-sector micro base station, the omni base station is regarded as a cell, and the tri-sector macro/micro base station is also regarded as a cell (see fig. 6 for details).
A system processing unit: namely, a system module of the 5G system for allocating bandwidth to the users in the edge area of the macro-micro cell, which is integrated in the core network (see https:// baike. baidu. com/item/% E6% A0% B8% E5% BF 83% E7% BD% 91/9849330), the base station or the BBU device. The system module is actually a functional module for distributing sub-carriers according to the network interference condition, is a software function, is not hardware, and can be realized by software upgrading. Specifically, the function and algorithm upgrading is realized through AMF (access and mobility management function) and UPF (user plane function) of a 5G core network and BBU (base band unit) of a base station.
The cell center and cell edge defining method comprises the following steps: the far point index of the near point, the middle point and the far point acknowledged in the industry is used as the threshold value of the cell edge, or the RS-SINR/RSRP value specified by the operator is used as the threshold value M, and the region of the signal index smaller than the threshold value is the cell edge. (4G generally adopts a value that a near point RSRP is-80 dBm, a middle point RSRP is-95 dBm, a far point RSRP is-105 dBm, 5G has no known index because no network exists yet, 5G RSRP may be lower than 4G by about 5 dB), or an operator-specified RS-SINR/RSRP (RS-SINR: signal-to-interference-plus-noise ratio of a common reference signal; RSRP: reference signal received power) value is used as a threshold value M, and a region where the signal index is smaller than the threshold value M is a cell edge user, and others are central users.
When the user correlation index changes (the central user index is larger than the threshold value/the edge user index is smaller than the threshold value), the lag time T1 needs to pass, the user index is always kept in the changed range in the T1 time, and the system correspondingly changes the user attribute.
Relation of macro and micro base stations: and referring to a neighbor cell list of the large network, the micro base stations are mutually allocated to the adjacent macro base stations, one micro base station and several macro base stations can be mutually adjacent cells, and when one micro base station simultaneously receives a command of increasing/reducing the bandwidth of the system processing unit, the micro base station executes the command of reducing the bandwidth.
Calculation and definition of interference: with the operator/industry specified edge cell target RS-SINR value as a and the operator/industry specified appropriate step size to increase/decrease the primary variation of bandwidth as B (N is proposed to be an integer multiple of B), the bandwidth allocation formula is as follows:
the system initially allocates the bandwidth of all the macro micro cell edge area users to be N.
When the average RS-SINR value of the edge user of the macro base station is smaller than A, the edge user of the macro base station reduces the bandwidth B on f3 (from X + N0 to X + N) and has the least bandwidth f2, and the adjacent micro base station reduces the bandwidth B on f2 (from X to X + N0) and has the least bandwidth f 3;
and when the average RS-SINR value of the macro base station edge user is larger than or equal to A, the macro base station increases the bandwidth B on f3, and the adjacent micro base stations increase the bandwidth B on f 2.
After the throughput meets the correlation condition, a lag time T2 is needed, and after the edge region user interference value meets the correlation condition all the time in time T2, the system increases/decreases the B bandwidth for the edge region user.
The scheme operation process comprises the following steps: when the system is initially operated, the system processing unit determines cell center users and cell edge users according to a cell edge defining method, and allocates all N bandwidths to the cell center users and the cell edge users. After the average RS-SINR value of the edge users of the macro base station is continuously smaller than A in T2 time, the edge users of the macro base station randomly reduce the bandwidth B on f3 (from X + N0 to X + N) until the macro base station only has the bandwidth f 2; meanwhile, its neighboring micro base station randomly reduces the bandwidth B over f2 (X to X + N0) until the neighboring micro base station has only the bandwidth f 3. And when the average RS-SINR value of the macro base station edge user is continuously greater than or equal to A in T2 time, the macro base station randomly increases the bandwidth B in f3, and the adjacent micro base stations randomly increase the bandwidth B in f 2. When the RS-SINR/RSRP of a certain cell edge user is continuously larger than M in T1 time, the system changes the user attribute into a cell center user, all N bandwidth is always allocated to the user, and the process of changing the center area user into the cell edge user is similar.
Examples
Assuming that all macro base stations of a 5G network of an operator adopt three-sector mode networking, a micro base station is an omnidirectional station, and the frequency spectrum bandwidth f1 of the micro base station is 100 MHz; the macro base station base-preserving sub-spectrum f2 is (X to X +70) MHz, and the micro base station base-preserving sub-spectrum f3 is (X +70 to X +100) MHz; using RS-SINR as 10dB as threshold value defined by user at edge of cell; lag time T1 is 5 seconds; the target RS-SINR threshold value A of the marginal cell is 3 dB; the step B of increasing/decreasing the bandwidth is 10 MHz; lag time T2 is 1 second; the system processing unit is integrated in the core network and the BBU.
The scheme operates as follows (see fig. 8): when the system is initially operated, a system processing unit distributes 100MHz bandwidth to a cell center user (RS-SINR is more than or equal to 10dB) and a cell edge user (RS-SINR is less than 10 dB);
when the average RS-SINR value of the edge user of the macro base station is continuously less than 3dB in 1s, the edge user of the macro base station randomly reduces 10MHz bandwidth from f3 (from (X +70) MHz to (X +100) MHz), and so on until the macro base station only has bandwidth f 2; meanwhile, its neighboring micro base station randomly reduces the bandwidth of 10MHz [ XMHz to (X +70) MHz ] at f2, and so on until the neighboring micro base station has only the bandwidth of f 3.
And when the average RS-SINR value of the macro base station edge user is continuously greater than or equal to 3dB in 1s, the macro base station randomly increases 10MHz bandwidth on f3, and the adjacent micro base stations randomly increase 10MHz bandwidth on f 2.
When the RS-SINR value of a user at the edge of a certain cell is continuously greater than 10dB within 5s, the system processing unit changes the user attribute into a user at the center of the cell and always allocates f1(100MHz) bandwidth to the user;
when the RS-SINR value of a user at the center of a certain cell is continuously less than 10dB within 5s, the system processing unit changes the user attribute into a user at the edge of the cell.
The present invention provides a 5G interference-based macro and micro base station cooperative frequency reuse method, and a number of methods and approaches for implementing the technical solution are provided, and the above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a number of improvements and refinements may be made without departing from the principle of the present invention, and these improvements and refinements should also be regarded as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (5)
1. A5G interference-based macro and micro base station cooperative frequency reuse method is characterized by comprising the following steps:
step 1, establishing a system processing unit;
step 2, the system processing unit determines a cell center user and a cell edge user according to a cell edge defining method, and allocates all N bandwidths to the cell center user and the cell edge user;
and 3, the system processing unit sends a command of increasing or decreasing the bandwidth to the macro base station and the micro base station according to the signal to interference plus noise ratio of the common reference signal.
2. The method of claim 1, wherein step 1 comprises: and establishing a system processing unit, wherein the system processing unit is a system module for distributing bandwidth to cell edge users by the 5G system, and the system module is integrated in a core network, a base station or BBU (base band unit) equipment.
3. The method of claim 2, wherein step 2 comprises: taking far point indexes of a near point, a middle point and a far point which are acknowledged in the industry as a threshold value, or taking an RS-SINR or RSRP value specified by an operator as the threshold value, wherein the RS-SINR represents the signal-to-interference-plus-noise ratio of a common reference signal, the RSRP represents the receiving power of the reference signal, users in an area with the signal index smaller than the threshold value are cell edge users, and users in other areas are cell center users; the network single-carrier bandwidth of the 5G system is N, and the system processing unit distributes the whole N bandwidth to the cell center user and the cell edge user.
4. The method of claim 3, wherein step 3 comprises: dividing all frequency spectrums f1 of a 5G system into two sub-frequency spectrums f2 and f3, wherein f2 is a macro base station bottom-preserving sub-frequency spectrum, f3 is a micro base station bottom-preserving sub-frequency spectrum, X is an initial frequency, and N0 is a value for distinguishing the macro base station bottom-preserving sub-frequency spectrum and the micro base station bottom-preserving sub-frequency spectrum; when the average RS-SINR value of cell edge users under the coverage of the macro base station is continuously smaller than A in T2 time, randomly reducing the bandwidth B on f3 by the cell edge users under the coverage of the macro base station until the macro base station only has the bandwidth f 2; f3 ranges from X + N0 to X + N; meanwhile, the bandwidth B of the macro base station adjacent micro base station is randomly reduced on f2 until the macro base station adjacent micro base station only has the bandwidth f 3; f2 ranges from X to X + N0;
when the average RS-SINR value of the macro base station edge user is continuously larger than or equal to A in T2 time, the macro base station randomly increases the bandwidth B on f3, and the adjacent micro base stations randomly increase the bandwidth B on f 2;
when the RS-SINR or RSRP value of a cell edge user is continuously larger than a threshold value in T1 time, the system changes the user attribute into a cell center user and always allocates all N bandwidth for the user;
when the RS-SINR or RSRP value of a cell center user is continuously smaller than the threshold value in T1 time, the system changes the user attribute into a cell edge user and always allocates the whole N bandwidth for the user.
5. The method according to claim 4, wherein in step 3, the relationship between the macro base station and the micro base station is: the micro base stations are mutually allocated to adjacent macro base stations, one micro base station can be adjacent to more than two macro base stations, and when one micro base station simultaneously receives the instruction of increasing the bandwidth and reducing the bandwidth of the system processing unit, the micro base station executes the instruction of reducing the bandwidth.
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| CN103686744A (en) * | 2013-12-03 | 2014-03-26 | 北京邮电大学 | Resource allocation methods, macro base station, femto base station and communication system |
| CN103796216A (en) * | 2014-01-08 | 2014-05-14 | 西安电子科技大学 | Interference suppression method based on fractional frequency reuse and joint transmission in heterogeneous network |
| CN104219676A (en) * | 2014-08-26 | 2014-12-17 | 江苏省邮电规划设计院有限责任公司 | Single station traffic based dynamic frequency reuse method for TD-LTE (time division long term evolution) |
| CN106792722A (en) * | 2016-12-19 | 2017-05-31 | 北京科技大学 | Heterogeneous hierarchical LTE system fractional frequency reuse method based on intermediary region |
| CN107277924A (en) * | 2017-04-24 | 2017-10-20 | 江苏省邮电规划设计院有限责任公司 | Dynamic frequency multiplexing method based on type of service in a kind of LTE system |
| CN109068388A (en) * | 2018-07-10 | 2018-12-21 | 中通服咨询设计研究院有限公司 | A kind of dynamic frequency multiplexing method for 5G network based on four colour theorem |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111542067A (en) * | 2020-05-09 | 2020-08-14 | 中通服咨询设计研究院有限公司 | Interference back-off method based on service type in 5G network |
| CN111542067B (en) * | 2020-05-09 | 2022-11-29 | 中通服咨询设计研究院有限公司 | Interference back-off method based on service type in 5G network |
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