CN114786211B - Xn interface-based 5G communication indoor subsystem internal coordination interference method - Google Patents
Xn interface-based 5G communication indoor subsystem internal coordination interference method Download PDFInfo
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Abstract
The invention discloses a coordination interference method in a 5G communication room subsystem based on an Xn interface, which belongs to the technical field of communication and comprises the following steps that a plurality of baseband units (BBUs) are interacted through the Xn interface, and the message content of the Xn interface is increased: the base band unit BBU includes cell quantity, edge resource initial position and distribution direction of each cell, each cell adjusts its edge resource selection after taking the edge resource information of the interference cell between the base band unit BBUs in the system, and realizes the purpose of interference coordination.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a method for coordinating interference in a 5G communication indoor subsystem based on an Xn interface.
Background
Indoor distribution refers to a signal coverage mode for introducing base station signals into a room to solve indoor blind area coverage, and an indoor distribution system mainly comprises a signal source and a distribution system. Currently, indoor coverage is mainly divided into two categories: the system has the characteristics of an indoor shallow layer coverage scheme and an indoor deep layer coverage scheme, comprehensive monitoring of all nodes from the information source access to the tail end of a multi-network optical fiber distribution system and the like, and is widely applied to places such as residential high-grade cells, high-grade office buildings, airports, gymnasiums, large hotels and hotels. The base band unit supports the specifications of 2 cells and 4 cells, the specification of 2 cells supports 1-2 cells, the specification of 4 cells supports 1-4 cells, and the cells under the base band unit usually adopt a co-frequency deployment mode, so that co-frequency interference can be generated between the cells.
The traditional co-channel interference method is divided into 3 types according to the resource limitation mode: hard frequency reuse, Fractional frequency reuse, and soft frequency reuse. The Hard frequency reuse divides a total frequency band into three sections (f 1, f2, f 3), one section is used for each adjacent cell, and overlapping frequency band resources cannot be used between the adjacent cells, so that interference between the adjacent cells is minimum, but frequency spectrum efficiency is low. Then dividing the non-central resource into three segments, and using one segment of frequency resource by the adjacent cell, thus the advantage of distinguishing the central user from the edge user is that the frequency efficiency is improved, but the blocking resource still exists. The main idea of soft frequency reuse is to divide the total frequency band into three segments, select one segment of adjacent cells as its edge resource, and use the other two segments as its center resource.
The common point of the 3 types of interference coordination methods is that both edge resources and center resources are fixed, and for the case of a large multi-user multi-service load, the interference coordination effect is not ideal, so that the network performance is reduced, the user service experience is poor, and meanwhile, for the case of no user in the neighboring area, the resource utilization rate is reduced by fixing the edge resources and the center resources.
Disclosure of Invention
Problems to be solved
Aiming at the problems that the existing interference coordination effect is not ideal, the network performance is reduced, the user service experience is poor, and the resource utilization rate is low due to the fact that edge resources and center resources are fixed, the invention provides an Xn interface-based interference coordination method in a 5G communication room subsystem.
Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A method for coordinating interference in a 5G communication room subsystem based on an Xn interface comprises the following steps:
step 1: numbering the baseband units, setting the number of cells contained in each baseband unit, numbering each cell, and setting the initial starting position and the distribution direction of edge resources of each cell;
step 2: the baseband units establish communication connection through an Xn interface, and send data parameter information and measurement report information through the Xn interface;
and 3, step 3: and the baseband unit adjusts the initial position and the distribution direction of the edge resource of the cell according to the data parameter information and the measurement report information sent by other baseband units.
Preferably, the number of cells included in each baseband unit in step 1 is two, and each baseband unit includes two cell specifications and each baseband unit includes four cell specifications.
Preferably, the data parameter information includes a high interference indication, an overload indication, a related narrowband transmission power, a reference signal received power, and the number of cells set in step 1, as well as an initial starting position and an allocation direction of edge resources of the cells.
Preferably, the adjusting itself includes adjusting the starting position and the allocation direction of the edge resource of the cell according to the reference signal received power and the cell specification included in the baseband unit.
Preferably, the adjustment is mainly as follows:
identifying edge cells according to reference signal received power: when the reported event is A1, judging that the cell is a central cell; when the reporting event is A2 and the receiving power of the reference signal of the strongest adjacent cell is-6 dB higher than that of the cell, judging that the cell is an edge cell; judging that the cell is a central cell under other conditions;
classifying the edge cells according to the strongest adjacent cells: the PCI model three of the strongest adjacent region is 0, the PCI model three of the strongest adjacent region is 1 and the PCI model three of the strongest adjacent region is 2;
and determining and adjusting the bandwidth resources allocated to the edge cell according to the high interference indication and the overload indication.
Preferably, when the baseband unit includes specifications of two cells, the bandwidth resources allocated to the edge cell are determined and adjusted to be divided into two cases, namely one interfering neighbor cell and two interfering neighbor cells.
Preferably, when the number of the interference neighboring cells is one and the bandwidth starting position is high frequency, the edge resource allocation direction of the current cell is from high frequency bandwidth to low frequency bandwidth, and the baseband unit to which the interference neighboring cell belongs adjusts the edge resource allocation of the interference neighboring cell to be from low frequency bandwidth to high frequency bandwidth through Xn interactive messages;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and distribution direction of the current cell and the edge resource allocation and distribution direction of the interference neighbor cell are opposite to the directions;
when the initial positions of the bandwidths are high frequencies, the edge resource allocation direction of the current cell is from high-frequency bandwidth to low-frequency bandwidth, through Xn interactive messages, the baseband unit to which the interference neighbor cells belong adjusts the edge resource allocation of one interference neighbor cell to be from low-frequency bandwidth to high-frequency bandwidth, the initial position of the edge resource of the other interference neighbor cell is half bandwidth, and the allocation direction is from low-frequency bandwidth to high-frequency bandwidth;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and allocation direction of the current cell and the edge resource allocation direction of the interference neighbor cell are opposite to the above directions.
Preferably, when each baseband unit includes specifications of four cells, bandwidth resources allocated to the edge cell are divided into four cases, namely, one interference neighbor cell, two interference neighbor cells, three interference neighbor cells, and four interference neighbor cells.
Preferably, when the number of the interfering neighbor cells is one and the number of the interfering neighbor cells is two, the implementation method when each baseband unit includes four cell specifications is the same as the implementation method when each baseband unit includes two cell specifications.
Preferably, when the number of the interference neighboring cells is three and the initial position of the bandwidth is high frequency, the edge resource allocation direction of the current cell is from high frequency bandwidth to low frequency bandwidth, through Xn interactive messages, the baseband unit to which the interference neighboring cell belongs adjusts the edge resource allocation of one interference neighboring cell to be from low frequency bandwidth to high frequency bandwidth, the initial position of the edge resource of the other interference neighboring cell is at a half bandwidth, the allocation direction is from low frequency bandwidth to high frequency bandwidth, the initial position of the edge resource of the last interference neighboring cell is at a half bandwidth, and the allocation direction is from high frequency bandwidth to low frequency bandwidth;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and distribution direction of the current cell and the edge resource allocation and distribution direction of the interference neighbor cell are opposite to the directions;
when four interference neighbor cells are provided and the bandwidth starting position is high frequency, the edge resource allocation direction of the current cell is from high frequency bandwidth to low frequency bandwidth, the baseband unit to which the interference neighbor cells belong adjusts the edge resource allocation of the first interference neighbor cell to be from low frequency bandwidth to high frequency bandwidth, the initial edge resource starting position of the second interference neighbor cell is a half bandwidth, the allocation direction is from low frequency bandwidth to high frequency bandwidth, the initial edge resource starting position of the third interference neighbor cell is a half bandwidth, the allocation direction is from high frequency bandwidth to low frequency bandwidth, the initial edge resource starting position of the fourth interference neighbor cell is a quarter bandwidth, and the allocation direction is from high frequency bandwidth to low frequency bandwidth;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and allocation direction of the current cell and the edge resource allocation direction of the interference neighbor cell are opposite to the above directions.
A method for coordinating interference in 5G communication indoor subsystem based on Xn interface solves the cell coordinating interference between baseband units by exchanging the messages based on Xn interface between baseband units in indoor subsystem and adding Xn interface message, for the baseband units with different cell specifications, high interference indication, overload indication, related narrowband transmission power and reference signal receiving power are obtained through the interaction of Xn interfaces among the baseband units, the edge resource allocation and the resource load condition indication of the adjacent cells among the baseband units are obtained, at the same time, the number of cells contained in a single baseband unit, the initial resource position and the allocation direction of the edge user are determined by adding an Xn interface message, and the adjacent cell can adjust the resource allocation of the edge user according to the received initial position and allocation direction of the edge user so as to realize interference coordination.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) the method solves the cell coordination interference among the baseband units by adding the Xn interface message, obtains the high interference indication, the overload indication, the related narrow-band transmission power and the reference signal receiving power for the baseband units with different cell specifications through the Xn interface interaction among the baseband units, and obtains the edge resource allocation and the resource load condition indication of the adjacent cells among the baseband units so as to realize better resource allocation;
(2) the invention determines the number of cells contained in a single baseband unit, the initial resource position and the allocation direction of edge users by adding Xn interface information, and the initial resource position and the allocation direction of each edge user are different according to different numbers of cells contained in a single baseband unit, so that resource allocation can be better realized by dynamically adjusting the direction of central resources or edge resources;
(3) the invention completes the interaction between the baseband units through the Xn interface, and the adjacent cell can adjust the resource allocation of the edge user according to the received initial position and allocation direction of the edge user, thereby realizing the interference coordination.
Drawings
In order to more clearly illustrate the embodiments or exemplary technical solutions of the present application, the drawings needed to be used in the embodiments or exemplary descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application and therefore should not be considered as limiting the scope, and it is also possible for those skilled in the art to obtain other drawings according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of the process steps of the present invention;
fig. 2 is a schematic diagram of a resource allocation scheme of an edge cell in embodiments 2 and 3 of the present invention;
FIG. 3 is a schematic diagram of Xn information interaction between BBUs according to the present invention;
FIG. 4 is a schematic flow chart of the method of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments, and generally, components of the embodiments of the present application described and illustrated in the drawings herein can be arranged and designed in various different configurations.
Therefore, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application, and all other embodiments that can be derived by one of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of the claimed application.
Example 1
As shown in fig. 1, a method for coordinating interference in a 5G communication indoor subsystem based on an Xn interface includes the following specific processes:
the method comprises the steps of numbering baseband units BBUs, wherein the baseband units BBUs are numbered as BBUs 1 and BBUs 2, the number of Cell units contained in each baseband unit is set, each Cell unit is numbered as Cell1 and Cell2, and the number of the Cell units contained in each baseband unit BBU is set to be two conditions, each baseband unit BBU contains two Cell specifications, each baseband unit BBU contains four Cell specifications, and the initial starting position and the distribution direction of edge resources of each Cell are set.
The baseband units BBU establish communication connection through an Xn interface, and send data parameter information and measurement report information MR through the Xn interface, wherein the data parameter information comprises a high interference indication HII, an overload indication OI, related narrowband transmission power RNTP, reference signal received power RSRP, the number of cells, and initial starting positions and allocation directions of edge resources of the cells.
After the baseband unit BBU adjusts the edge resource starting position and the allocation direction of its own cell according to the data parameter information and the measurement report information sent by other baseband units, the adjustment of the edge resource starting position and the allocation direction of its own cell is performed according to the reference signal received power RSRP and the cell specification included in the baseband unit, and the adjustment mode is mainly as follows:
identifying an edge cell according to Reference Signal Received Power (RSRP): when the reported event is A1, judging that the cell is a central cell; when the reporting event is A2 and the Reference Signal Received Power (RSRP) of the strongest adjacent cell is-6 dB higher than that of the cell, judging that the cell is an edge cell; judging that the cell is a central cell under other conditions;
classifying the edge cells according to the strongest adjacent cells: the PCI model three of the strongest adjacent region is 0, the PCI model three of the strongest adjacent region is 1 and the PCI model three of the strongest adjacent region is 2;
and determining and adjusting the bandwidth resource RB allocated to the edge cell according to the high interference indication HII and the overload indication OI.
When the baseband unit BBU includes specifications of two cells, the BBU1 includes Cell1 and Cell2, the BBU2 includes Cell3 and Cell4, and the bandwidth resource RB allocated to the edge Cell is determined and adjusted to be divided into two cases, namely, one interference neighbor Cell and two interference neighbor cells:
when the interference neighbor Cell of the Cell1 is one, that is, the Cell3, and the starting position of the bandwidth RB is high frequency, the edge resource allocation direction of the current Cell1 is from the high frequency bandwidth RB to the low frequency bandwidth RB, and through Xn interactive messages, the baseband unit BBU2 to which the interference neighbor Cell3 belongs adjusts the edge resource allocation of the interference neighbor Cell3 from the low frequency bandwidth RB to the high frequency bandwidth RB;
if the starting position of the bandwidth RB of the current Cell1 is low frequency, the edge resource allocation direction of the current Cell1 is from the low frequency bandwidth RB to the high frequency bandwidth RB, and through Xn interaction messages, the baseband unit BBU2 to which the interfering neighbor Cell3 belongs adjusts the edge resource allocation of the interfering neighbor Cell3 from the high frequency bandwidth RB to the low frequency bandwidth RB;
the interference neighbor cells are two cells, namely Cell3 and Cell4, and when the starting position of the bandwidth RB is high frequency, the edge resource allocation direction of the current Cell1 is from the high frequency bandwidth RB to the low frequency bandwidth RB, through Xn interactive messages, the baseband unit BBU2 to which the interference neighbor Cell belongs adjusts the edge resource allocation of one interference neighbor Cell3 to be from the low frequency bandwidth RB to the high frequency bandwidth RB, the starting position of the initial edge resource of the other interference neighbor Cell4 is half of the bandwidth, and the allocation direction is from the low frequency bandwidth RB to the high frequency bandwidth RB;
if the bandwidth starting position of the current Cell1 is a low-frequency RB, the edge resource allocation direction of the current Cell1 is from the low-frequency bandwidth RB to a high-frequency bandwidth RB, and through Xn interaction messages, the baseband unit BBU2 to which the interfering neighbor belongs adjusts the edge resource allocation of one interfering neighbor Cell3 to be from the high-frequency bandwidth RB to the low-frequency bandwidth RB, the initial edge resource starting position of the other interfering neighbor Cell4 is a half bandwidth, and the allocation direction is from the high-frequency bandwidth RB to the low-frequency bandwidth RB.
When each baseband unit BBU includes four cells of Cell specification, BBU1 includes Cell1, Cell2, Cell3, and Cell4, BBU2 includes Cell5, Cell6, Cell7, and Cell8, and bandwidth RB resources allocated to edge Cell1 are divided into four cases, that is, one interference neighbor, two interference neighbors, three interference neighbors, and four interference neighbors:
when the interference neighbor Cell is one Cell, namely Cell5, and the bandwidth starting position is high-frequency RB, the edge resource allocation direction of the current Cell1 is from high-frequency bandwidth RB to low-frequency bandwidth RB, and through Xn interaction messages, the baseband unit BBU2 to which the interference neighbor Cell5 belongs adjusts the edge resource allocation of the interference neighbor Cell5 from low-frequency bandwidth RB to high-frequency bandwidth RB;
if the bandwidth starting position of the current Cell1 is a low-frequency RB, the edge resource allocation direction of the current Cell1 is from the low-frequency RB to a high-frequency RB, and through Xn interaction messages, the baseband unit BBU2 to which the interfering neighbor Cell5 belongs adjusts the edge resource allocation of the interfering neighbor Cell5 from the high-frequency RB to the low-frequency RB;
the interference neighbor cells are two cells, namely Cell5 and Cell6, and when the bandwidth starting position is a high-frequency RB, the edge resource allocation direction of the current Cell1 is from the high-frequency bandwidth RB to a low-frequency bandwidth RB, through Xn interactive messages, the baseband unit BBU2 to which the interference neighbor Cell belongs adjusts the edge resource allocation of one interference neighbor Cell5 to be from the low-frequency bandwidth RB to the high-frequency bandwidth RB, the initial edge resource starting position of the other interference neighbor Cell6 is half of the bandwidth, and the allocation direction is from the low-frequency bandwidth RB to the high-frequency bandwidth RB;
if the bandwidth starting position of the current Cell1 is a low-frequency RB, the edge resource allocation direction of the current Cell1 is from the low-frequency bandwidth RB to a high-frequency bandwidth RB, and through Xn interaction messages, the baseband unit BBU2 to which the interfering neighbor belongs adjusts the edge resource allocation of one interfering neighbor Cell5 to be from the high-frequency bandwidth RB to the low-frequency bandwidth RB, the initial edge resource starting position of the other interfering neighbor Cell6 is a half bandwidth, and the allocation direction is from the high-frequency bandwidth RB to the low-frequency bandwidth RB.
When the number of the interference neighbor cells is three, namely Cell5, Cell6 and Cell7, and the bandwidth starting position of Cell1 is high-frequency RB, the edge resource allocation direction of the current Cell1 is from high-frequency bandwidth RB to low-frequency bandwidth RB, through Xn interactive messages, the baseband unit BBU2 to which the interference neighbor Cell belongs adjusts the edge resource allocation of one interference neighbor Cell5 to be from low-frequency bandwidth RB to high-frequency bandwidth RB, the initial edge resource starting position of the other interference neighbor Cell6 is half bandwidth, the allocation direction is from low-frequency bandwidth RB to high-frequency bandwidth RB, the initial edge resource starting position of the last interference neighbor Cell7 is half bandwidth, and the allocation direction is from high-frequency bandwidth RB to low-frequency bandwidth RB;
if the bandwidth starting position of the current Cell1 is a low-frequency RB, the edge resource allocation direction of the current Cell1 is from the low-frequency bandwidth RB to a high-frequency bandwidth RB, through Xn interactive messages, the baseband unit BBU2 to which the interfering neighbor belongs adjusts the edge resource allocation of one interfering neighbor Cell5 to be from the high-frequency bandwidth RB to the low-frequency bandwidth RB, the initial edge resource starting position of the other interfering neighbor Cell6 is a half bandwidth, the allocation direction is from the high-frequency bandwidth RB to the low-frequency bandwidth RB, the initial edge resource starting position of the last interfering neighbor Cell7 is a half bandwidth, and the allocation direction is from the low-frequency bandwidth RB to the high-frequency bandwidth RB;
when four interference neighbor cells are provided, namely Cell5, Cell6, Cell7 and Cell8, and the bandwidth starting position of Cell1 is high-frequency RB, the edge resource allocation direction of the current Cell1 is from high-frequency bandwidth RB to low-frequency bandwidth RB, the baseband unit BBU2 to which the interference neighbor cells belong adjusts the edge resource allocation of the first interference neighbor Cell5 to be from low-frequency bandwidth RB to high-frequency bandwidth RB, the initial edge resource starting position of the second interference neighbor Cell6 is half bandwidth, the allocation direction is from low-frequency bandwidth RB to high-frequency bandwidth RB, the initial edge resource starting position of the third interference neighbor Cell7 is half bandwidth, the allocation direction is from high-frequency bandwidth RB to low-frequency bandwidth RB, the initial edge resource starting position of the fourth interference neighbor Cell8 is quarter bandwidth, and the allocation direction is from high-frequency bandwidth RB to low-frequency bandwidth RB;
if the bandwidth starting position of the current Cell1 is a low-frequency RB, the edge resource allocation direction of the current Cell1 is from the low-frequency bandwidth RB to a high-frequency bandwidth RB, the baseband unit BBU2 to which the interfering neighbor belongs adjusts the edge resource allocation of the first interfering neighbor Cell5 from the high-frequency bandwidth RB to the low-frequency bandwidth RB, the initial edge resource starting position of the second interfering neighbor Cell6 is at a half-bandwidth position, the allocation direction is from the high-frequency bandwidth RB to the low-frequency bandwidth RB, the initial edge resource starting position of the third interfering neighbor Cell7 is at a half-bandwidth position, the allocation direction is from the low-frequency bandwidth RB to the high-frequency bandwidth RB, the initial edge resource starting position of the fourth interfering neighbor Cell8 is at a quarter-bandwidth position, and the allocation direction is from the low-frequency bandwidth RB to the high-frequency bandwidth RB.
As can be seen from the above description, in this example, a plurality of baseband units BBUs are made to interact through an Xn interface, and by adding the message content of the Xn interface: the method comprises the steps that the base band unit BBU comprises the number of cells, the initial position and the distribution direction of edge resources of each cell, each cell adjusts the selection of the edge resources of the cell after taking the edge resource information of interference cells between the base band units BBUs in a system, and the purpose of interference coordination is achieved.
Example 2
The BBUs of the double baseband units are of the specification of two cells, the maximum interference adjacent cell is smaller than or equal to the bandwidth of 100MHz of the two cells, 273RB is total, the number from low frequency to high frequency is 0-272, the BBU1 of the baseband unit obtains the number of the cells in the BBU2 through Xn interface interaction information, obtains the edge starting position and the distribution direction of each cell in the BBU1 of the baseband unit, determines the number of the possible adjacent cells, and adjusts the edge resource selection of each cell in the coverage range of the BBU.
As shown in fig. 2:
the first condition is as follows: cell within baseband unit BBU 1: cell1 and Cell2, baseband unit BBU2 intra-Cell: the Cell3 and the Cell4, the baseband unit BBU1 Cell1 PCI167 has only one neighbor Cell3 PCI 100; cell1 uses edge Cell resource allocation (1), the edge resource starting position is RB272, and the allocation direction is from RB272 to RB 0; cell3 uses Cell resource allocation (2), the starting position of the edge resource is RB0, the allocation direction is from RB0 to RB272, then according to the size of PCI or the sequence of Cell internal numbers, a resource allocation group is selected for the Cell, Cell1 PCI67 selects Cell resource allocation (1), Cell3 PCI100 selects Cell resource allocation (2).
Case two: baseband unit BBU 1: the interfering cells of Cell1 are: the interference cells of the Cell3, the Cell4 and the Cell2 are as follows: cell4, Cell1 adopted scenario (1) in case one, and Cell2 adopted scenario (2) in case one; cell edge resource allocation scheme (5): the starting position starts from a half bandwidth, namely 136, and the distribution direction is from 136 to 272; cell edge resource allocation scheme (6): the initial position starts from a half bandwidth, namely 135, and the distribution direction is from 135 to 0; cell3 employs scenario (5), and Cell4 employs scenario (6).
Example 3
The BBU comprises double Base Band Units (BBUs), wherein each BBU is of 4-cell specification, the maximum interference adjacent cell is smaller than or equal to 4-cell bandwidth and is 100MHz, 273RB in total, the number from low frequency to high frequency is 0-272, the BBU1 obtains the number of cells in the BBU2 through Xn interface interaction information, obtains the edge starting position and the distribution direction of each cell in the BBU1, determines the number of possible adjacent cells, and adjusts the edge resource selection of each cell in the coverage range of the BBU.
Assume the case of interfering cell 4: cell within baseband unit BBU 1: cell1, Cell2, Cell3, Cell4, baseband unit BBU2 intra-Cell: cell5, Cell6, Cell7, and Cell 8.
Neighborhood interference of baseband unit BBU1 Cell 1: cell5, Cell6, Cell7, and Cell 8; neighborhood interference of baseband unit BBU1 Cell 2: cell6, Cell7, and Cell 8; neighborhood interference of baseband unit BBU1 Cell 3: cell7 and Cell 8; neighborhood interference of baseband unit BBU1 Cell 4: cell 8.
As shown in fig. 2:
scheme (1): the starting position of the edge resource is RB272, and the allocation direction is from RB272 to RB 205;
scheme (2): the starting position of the edge resource is RB0, and the allocation direction is from RB0 to RB 67;
scheme (3): the starting position starts from the bandwidth of 3/4, namely 272-272/4+1=205, and the distribution direction is from 205-272;
scheme (4): the starting position starts from the bandwidth of 3/4, namely No. 204, and the distribution direction is from 204 to 136;
scheme (5): the starting position starts from a half bandwidth, namely 136, and the distribution direction is from 136 to 205;
scheme (6): the initial position starts from a half bandwidth, namely 135, and the distribution direction is from 135 to 68;
scheme (7): the starting position starts from the 1/4 bandwidth, namely 272/4=68, and the distribution direction is from 68-135;
scheme (8): the starting position starts from the bandwidth of 1/4, namely 272/4-1=67, and the distribution direction is from 67-0.
Scheme (1) is adopted for Cell1, scheme (2) is adopted for Cell2, scheme (3) is adopted for Cell3, scheme (4) is adopted for Cell4, scheme (5) is adopted for Cell5, scheme (6) is adopted for Cell6, scheme (7) is adopted for Cell7, and scheme (8) is adopted for Cell 8.
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention.
Claims (6)
1. A method for coordinating interference in a 5G communication room subsystem based on an Xn interface is characterized by comprising the following steps:
step 1: numbering the baseband units, setting the number of cells contained in each baseband unit, numbering each cell, limiting the bandwidth distribution range and the initial position range of the cell according to the number of the cells of the baseband units, presetting the edge resource distribution scheme and the priority of the distribution scheme of the interference neighboring cell, and setting the initial position and the distribution direction of the edge resource of each cell;
step 2: establishing communication connection among the baseband units through an Xn interface, and sending data parameter information and measurement report information to the baseband units with the interference neighbor cells through the Xn interface according to the cell specification number in the baseband units and the interference neighbor cell number of the cells and combining the initial starting position and the distribution direction of the edge resources of each cell;
and step 3: and the baseband unit with the interference adjacent cell adjusts the initial position and the distribution direction of the edge resource of the interference adjacent cell by adopting a preset distribution scheme according to the data parameter information and the measurement report information sent by other baseband units and the limited bandwidth distribution range and initial position range of the cell in combination with the priority of the distribution scheme.
2. The method as claimed in claim 1, wherein the number of cells included in each baseband unit in step 1 is two, and each baseband unit includes two cell specifications and four cell specifications.
3. The method of claim 2, wherein the data parameter information includes high interference indication, overload indication, related narrowband transmission power, reference signal received power, number of cells set in step 1, and initial starting position and allocation direction of edge resources of the cells.
4. The method of claim 3, wherein the adjusting of the starting position and the allocation direction of the edge resources of the cell included in the method according to the reference signal received power and the cell specification included in the baseband unit is mainly performed as follows:
identifying edge cells according to reference signal received power: when the reported event is A1, judging that the cell is a central cell; when the reporting event is A2 and the receiving power of the reference signal of the strongest adjacent cell is-6 dB higher than that of the cell, judging that the cell is an edge cell; judging that the cell is a central cell under other conditions;
classifying the edge cells according to the strongest adjacent cells: the PCI model three of the strongest adjacent region is 0, the PCI model three of the strongest adjacent region is 1 and the PCI model three of the strongest adjacent region is 2;
and determining and adjusting the bandwidth resources allocated to the edge cell according to the high interference indication and the overload indication.
5. The method of claim 4, wherein when the baseband unit includes two cell specifications, the bandwidth resources allocated to the edge cell are divided into two cases, namely one interference cell and two interference cells;
when the number of the interference neighbor cells is one and the bandwidth starting position is high frequency, the edge resource allocation direction of the current cell is from high frequency bandwidth to low frequency bandwidth, and the baseband unit to which the interference neighbor cells belong adjusts the edge resource allocation of the interference neighbor cells from low frequency bandwidth to high frequency bandwidth through Xn interactive messages;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and distribution direction of the current cell and the edge resource allocation and distribution direction of the interference neighbor cell are opposite to the directions;
when the initial positions of the bandwidths are high frequencies, the edge resource allocation direction of the current cell is from high-frequency bandwidth to low-frequency bandwidth, through Xn interactive messages, the baseband unit to which the interference neighbor cells belong adjusts the edge resource allocation of one interference neighbor cell to be from low-frequency bandwidth to high-frequency bandwidth, the initial position of the edge resource of the other interference neighbor cell is half bandwidth, and the allocation direction is from low-frequency bandwidth to high-frequency bandwidth;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and allocation direction of the current cell and the edge resource allocation direction of the interference neighbor cell are opposite to the above directions.
6. The method of claim 4, wherein when each baseband unit includes four cell specifications, the bandwidth resources allocated by the edge cell are divided into four cases, namely one interference neighbor cell, two interference neighbor cells, three interference neighbor cells, and four interference neighbor cells;
when one interference adjacent cell and two interference adjacent cells are used, the implementation method is the same as the method for coordinating interference in the Xn interface-based 5G communication indoor subsystem according to claim 5;
when the number of the interference neighbor cells is three and the bandwidth initial position is high frequency, the edge resource allocation direction of the current cell is from high frequency bandwidth to low frequency bandwidth, through Xn interactive messages, the baseband unit to which the interference neighbor cells belong adjusts the edge resource allocation of one interference neighbor cell to be from low frequency bandwidth to high frequency bandwidth, the initial edge resource initial position of the other interference neighbor cell is a half bandwidth, the allocation direction is from low frequency bandwidth to high frequency bandwidth, the initial edge resource initial position of the last interference neighbor cell is a half bandwidth, and the allocation direction is from high frequency bandwidth to low frequency bandwidth;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and distribution direction of the current cell and the edge resource allocation and distribution direction of the interference neighbor cell are opposite to the directions;
when four interference neighbor cells are provided and the bandwidth starting position is high frequency, the edge resource allocation direction of the current cell is from high frequency bandwidth to low frequency bandwidth, the baseband unit to which the interference neighbor cells belong adjusts the edge resource allocation of the first interference neighbor cell to be from low frequency bandwidth to high frequency bandwidth, the initial edge resource starting position of the second interference neighbor cell is a half bandwidth, the allocation direction is from low frequency bandwidth to high frequency bandwidth, the initial edge resource starting position of the third interference neighbor cell is a half bandwidth, the allocation direction is from high frequency bandwidth to low frequency bandwidth, the initial edge resource starting position of the fourth interference neighbor cell is a quarter bandwidth, and the allocation direction is from high frequency bandwidth to low frequency bandwidth;
if the starting position of the bandwidth of the current cell is low frequency, the edge resource allocation and allocation direction of the current cell and the edge resource allocation direction of the interference neighbor cell are opposite to the above directions.
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