CN105636063A - Method for configuring Nanocell in LTE and Nanocell therein - Google Patents
Method for configuring Nanocell in LTE and Nanocell therein Download PDFInfo
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Abstract
An embodiment of the invention discloses a method for configuring a Nanocell in a long term evolution (LTE) and the Nanocell therein. The method is applied on a first Nanocell. The method comprises the steps of acquiring physical cell identifications (PCIs) of all other Nanocells in neighboring relationship with the first Nanocell; computing the modulus values of all other Nanocells according to the PCIs of all other Nanocells; when three different modulus values exist in the computed modulus values, determining the modulus value of the Nanocell of which the pass loss to the first Nanocell is highest in all other Nanocells; and configuring the PCI which matches the computed modulus value for the first Nanocell, thereby settling a problem of interference between a newly network-accessed Nanocell and neighboring Nanocells.
Description
Technical Field
The invention relates to a Long Term Evolution (LTE) technology, in particular to a method for configuring a small base station Nanocell in LTE and the Nanocell.
Background
With the increase of communication data volume, LTE networks capable of carrying large data transmission are gaining favor of each large operator. The LTENanocell which can effectively absorb indoor or hotspot area traffic plays a crucial role in the LTE self-organizing network. Taking the example that the indoor a has deployed three nanocells, when a new Nanocell is added to the indoor a, deployment of all the nanocells of the indoor a at present can reduce deployment difficulty of the nanocells to a certain extent by using an automatic neighbor discovery optimization (ANR), Mobility Robustness Optimization (MRO) or load balancing (MLB) method, but interference between a newly-connected Nanocell and an opened Nanocell of the neighboring cell cannot be avoided.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention provide a method for configuring a Nanocell in LTE and a Nanocell, which can avoid interference between a newly-accessed Nanocell and a Nanocell in an adjacent cell.
The technical scheme of the embodiment of the invention is realized as follows:
the embodiment of the invention provides a method for configuring a small base station Nanocell in LTE, which is applied to a first Nanocell and comprises the following steps:
acquiring physical cell identity identifications (PCIs) of all other Nanocells in a neighboring cell relation with the first Nanocell in a network where the first Nanocell is located;
calculating the module values of all other nanocells according to the PCIs of all other nanocells;
when three different module values exist in the calculated module values, determining the module value of the Nanocell with the largest path loss with the first Nanocell in all other Nanocells;
and configuring the PCI matched with the determined module value for the first Nanocell.
In the foregoing solution, the configuring the PCI matched with the determined modulus value for the first Nanocell includes:
determining the modulus of the Nanocell with the largest path loss with the first Nanocell as a first modulus;
configuring the modulus value of the first Nanocell as the first modulus value;
and selecting an idle PCI with the modulus value as the first modulus value as the PCI of the first Nanocell in the network where the first Nanocell is located.
In the foregoing solution, after configuring the PCI matched with the determined modulus value for the first Nanocell, the method further includes:
determining the Nanocell with the largest path loss with the first Nanocell as a second Nanocell;
and when the path loss between the first Nanocell and the second Nanocell exceeds a preset first threshold value, adjusting the PCI of the second Nanocell to reduce the interference between the first Nanocell and the second Nanocell.
In the foregoing solution, the adjusting the PCI of the second Nanocell includes:
the method comprises the steps that a first notification message is sent to a second Nanocell by the first Nanocell, wherein the first notification message carries a module value of the second Nanocell recommended to the second Nanocell by the first Nanocell, so that after the second Nanocell receives the first notification message, a module value is selected from the module value calculated by the second Nanocell and the module value recommended by the first Nanocell to serve as a module value of the second Nanocell;
and configuring the PCI matched with the selected module value for the second Nanocell.
In the foregoing solution, when adjusting the PCI of the second Nanocell, the method further includes:
acquiring all the Nanocells which are in the adjacent area relationship with the first Nanocell and have different module values from the first Nanocell in the network where the first Nanocell is located;
determining all obtained nanocells as a first Nanocell group;
and collecting the first Nanocell and the first Nanocell group as a first locking set so as to avoid repeated adjustment of the PCI of the nanocells in the first locking set.
The embodiment of the invention also provides a small cell base station Nanocell, which comprises:
the first acquisition unit is used for acquiring the physical cell identity identifications (PCI) of all other nanocells which are in the adjacent cell relation with the first acquisition unit in a network where the first acquisition unit is located;
the first calculating unit is used for calculating the module values of all other nanocells according to the PCIs of all other nanocells, and triggering the first determining unit when three different module values exist in the calculated module values;
the first determining unit is used for determining the modulus value of the Nanocell with the largest path loss with the Nanocell in all other Nanocells;
and the first configuration unit is used for configuring the PCI matched with the determined module value for the first configuration unit.
In the above-mentioned scheme, the first step of the method,
the first configuration unit is further configured to:
determining the modulus of the Nanocell with the largest path loss with the Nanocell as a first modulus;
configuring the modulus value of the first Nanocell as the first modulus value;
and selecting an idle PCI with the modulus value of the first modulus value as the PCI of the network in which the PCI is positioned.
In the foregoing solution, the Nanocell further includes: a second determining unit and a first adjusting unit; wherein,
the second determining unit is configured to determine a Nanocell with the largest path loss as a second Nanocell;
the first adjusting unit is configured to adjust the PCI of the second Nanocell when it is determined that the path loss between the first and second nanocells exceeds a preset first threshold, so as to reduce interference between the first and second nanocells.
In the foregoing solution, the first adjusting unit is further configured to:
sending a first notification message to a second Nanocell, wherein the first notification message carries a module value of the second Nanocell recommended by the first Nanocell to the second Nanocell;
the first notification message is used for enabling the second Nanocell to select a module value from the module values calculated by the second Nanocell and the received module values as a module value of the second Nanocell, and configuring a PCI matched with the selected module value for the second Nanocell.
In the foregoing solution, the first adjusting unit is further configured to:
acquiring all nanocells which are in a neighboring cell relation with the nanocells and have different moduli with the nanocells in a network where the nanocells are located;
determining all obtained nanocells as a first Nanocell group;
the set itself and the first Nanocell group are the first locking set to avoid repeated adjustment of the PCI of the Nanocell in the first locking set.
The method for configuring the Nanocell in the LTE and the Nanocell provided by the embodiment of the invention are applied to the first Nanocell, and the method comprises the following steps: acquiring physical cell identity identifications (PCIs) of all other Nanocells in a neighboring cell relation with the first Nanocell in a network where the first Nanocell is located; calculating the module values of all other nanocells according to the PCIs of all other nanocells; when three different module values exist in the calculated module values, determining the module value of the Nanocell with the largest path loss with the first Nanocell in all other Nanocells; and configuring a PCI matched with the determined module value for the first Nanocell so as to at least solve the problem of interference between the newly accessed Nanocell and the neighboring Nanocell.
Drawings
Fig. 1 is a schematic flow chart of a method for configuring a Nanocell in LTE according to an embodiment of the present invention;
fig. 2(a) -2 (c) are schematic views of an application scenario provided by an embodiment of the present invention;
fig. 3 is a flowchart illustrating a specific implementation of a method for configuring a Nanocell in LTE according to an embodiment of the present invention;
fig. 4 is a schematic composition diagram of a Nanocell provided in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
In LTE, nanocells in the same area, such as the network in which the indoor a is located, all use a co-frequency networking mode, and different nanocells are distinguished by different Physical Cell Identities (PCI); because PCI/3 is NmodM (M is also a remainder, and takes a value of any positive integer from 0 to 2), nanocells with the same modulus value exist in the network in the same area, and interference occurs between nanocells with the same modulus value. Those skilled in the art will recognize that: two nanocells with the same modulus value do not necessarily have the same PCI, and for example, PCI 77, 77/3, 25mod2, PCI 2, 2/3, 0mod2, and both have 2 moduli, but the PCIs are different. The technical scheme of the embodiment of the invention can solve the problem of interference caused by the existence of the nanocells with the same modulus in the network in the same region.
The embodiment of the invention provides a method for configuring a Nanocell in LTE, which is applied to a first Nanocell, wherein the first Nanocell can be a Nanocell newly added into a certain network and/or a Nanocell of which the PCI needs to be adjusted due to the newly added Nanocell.
Fig. 1 is a schematic flow chart of a method for configuring a Nanocell in LTE according to an embodiment of the present invention; as shown in fig. 1, the method comprises the following steps:
step 101: acquiring physical cell identity identifications (PCIs) of all other Nanocells in a neighboring cell relation with the first Nanocell in a network where the first Nanocell is located;
here, in the network where the first Nanocell is located, whether the Nanocell and the Nanocell are in the neighbor relation may refer to the existing relevant description, for example: the first Nanocell can measure the power of a certain Nanocell, the power is higher than a certain threshold value such as 20dBm, and the first Nanocell and the Nanocell with the measured power are determined to be in a neighboring cell relation.
Step 102: calculating the module values of all other nanocells according to the PCIs of all other nanocells;
here, the module value M of all the other nanocells in the neighborhood relationship with the first Nanocell is obtained according to the above calculation formula of PCI/3 — NmodM.
Step 103: when three different module values exist in the calculated module values, determining the module value of the Nanocell with the largest path loss with the first Nanocell in all other Nanocells;
here, since M is 0, 1, or 2, when a Nanocell in a network where a first Nanocell is located occupies all of the three modulus values, it is described that interference between the Nanocell and the Nanocell is generated no matter which modulus value is configured for the first Nanocell in the following description; aiming at the situation, the method measures the path loss of the first Nanocell and each neighboring Nanocell, and extracts the modulus of the Nanocell with the largest path loss.
Step 104: configuring a PCI matched with the determined module value for the first Nanocell;
here, determining a modulus of the Nanocell having the largest path loss with the first Nanocell as a first modulus; configuring the modulus value of the first Nanocell to be the same as the first modulus value; and selecting an idle PCI with the modulus value as the first modulus value as the PCI of the first Nanocell in the network where the first Nanocell is located. The PCI value can be 1-504, and in a network where the first Nanocell is located, an unoccupied PCI is selected, and the modulus value of the PCI is the same as the modulus value of the Nanocell with the largest path loss.
In this embodiment of the present invention, after configuring a PCI matched with the determined modulus value for the first Nanocell, the method further includes:
determining the Nanocell with the largest path loss with the first Nanocell as a second Nanocell;
when the fact that the path loss between the first Nanocell and the second Nanocell exceeds a preset first threshold value is determined, adjusting the PCI of the second Nanocell to reduce interference between the first Nanocell and the second Nanocell; in this embodiment, the first threshold may be set to-90 dbm, and the specific first threshold may be flexibly set according to the actual use condition, which is not limited in this embodiment.
Wherein the adjusting the PCI of the second Nanocell comprises:
the method comprises the steps that a first notification message is sent to a second Nanocell by the first Nanocell, wherein the first notification message carries a module value of the second Nanocell recommended to the second Nanocell by the first Nanocell, so that after the second Nanocell receives the first notification message, a module value is selected from a second module value calculated by the second Nanocell and the module value recommended by the first Nanocell to serve as a module value of the second Nanocell; and configuring the PCI matched with the selected module value for the second Nanocell. For the description of configuring the PCI matched with the selected module value for the second Nanocell, refer to the description of configuring the PCI matched with the determined module value for the first Nanocell, which is not described herein again.
In adjusting the PCI of the second Nanocell, the method further comprises:
acquiring all the Nanocells which are in the adjacent area relationship with the first Nanocell and have different modulus values with the first Nanocell, namely different modulus values, in the network where the first Nanocell is located; determining all obtained nanocells as a first Nanocell group; and collecting the first Nanocell and the first Nanocell group as a first locking set so as to avoid repeated adjustment of the PCI of the nanocells in the first locking set.
After the PCI of the second Nanocell is adjusted, in a network where the second Nanocell is located, the second Nanocell may have a situation that a modulus interference occurs with a Nanocell in a neighboring area of the second Nanocell, the second Nanocell at this time may be called a Nanocell of which the PCI needs to be adjusted due to the new addition of the Nanocell in the network, and the foregoing steps 101 to 104 may be performed again to solve the interference problem between the nanocells.
For a Nanocell newly added to a certain network, in the added network, in addition to other nanocells, macro base stations may also exist; it is also desirable to avoid interference between the frequency points used by the newly added Nanocell and the frequency points used by the macro base station. The cell covered by the Nanocell is called a Nanocell cell, and the network covered by the macro base station is called a large network. The embodiment of the invention solves the selection problem of the use frequency point of the newly accessed Nanocell through the following scheme:
in LTE, the usable frequency band of a Nanocell is an E frequency band (50 MHz from 2320MHz to 2370 MHz), and generally, a large network uses 20MHz, and then a Nanocell may use 20MHz or 10 MHz.
When detecting that no macro network cell exists around the Nanocell, or detecting that a macro network cell exists around the Nanocell but the Reference Signal Received Power (RSRP) value of the macro network cell is smaller than a preset threshold value, such as-100 dBm, judging that no macro network coverage exists around the Nanocell; among them, because the power of the large network cell is maintained at 9 dBm-21 dBm, and the power of the Nanocell cell is maintained at about 6dBm, based on the power difference between the two, the Nanocell can easily detect whether the large network cell exists around. When it is determined that there is no macro coverage around the Nanocell, please refer to table 1, where the frequency selection range of the Nanocell is carrier aggregation of F1, or F2, or F1 and F2.
TABLE 1
| F1(20M) | F2(20M) | Idle (10M) |
When the Nanocell detects that 20MHz frequency points are used by peripheral large network cells, 30MHz idle frequency points are available; referring to table 2(a) to table 2(d), the frequency selection range of the Nanocell is carrier aggregation of F1, or F2, or F1 and F2.
TABLE 2(a)
| Big net (20M) | F1(20M) | F2(10M) |
TABLE 2(b)
| F1(20M) | Big net (20M) | F2(10M) |
TABLE 2(c)
| F1(10M) | Big net (20M) | F2(20M) |
TABLE 2(d)
| F1(10M) | F2(20M) | Big net (20M) |
When detecting that a peripheral large network cell uses a 40MHz frequency point, the Nanocell has a 10MHz idle frequency point available; referring to tables 3(a) to 3(c), the frequency selection range of Nanocell is F1.
TABLE 3(a)
| Big net (20M) | Big net (20M) | F1(10M) |
TABLE 3(b)
| Big net (20M) | F1(10M) | Big net (20M) |
Table 3(c)
| F1(10M) | Big net (20M) | Big net (20M) |
Since there is a carrier aggregation technology in LTE, this embodiment may also perform carrier aggregation on F1 and F2, that is, integrate intra-band and inter-band to improve data transmission rate; for specific definitions and functions of carrier aggregation, please refer to the description of the related art, which is not described herein.
Fig. 2(a) -2 (c) are schematic views of an application scenario provided by an embodiment of the present invention; fig. 3 is a flowchart illustrating a specific implementation of a method for configuring a Nanocell in LTE according to an embodiment of the present invention; this embodiment will be further described with reference to fig. 2(a) to 2(c) and fig. 3.
As shown in fig. 2(a), in indoor one, 6 nanocells in total are from original Nanocell1 to Nanocell 6; making the newly accessed Nanocell as a new Nanocell;
step 301: scanning the information of the peripheral LTE cell when the new Nanocell is started, screening out the Nanocell of the adjacent cell, and collecting the PCI information of the Nanocell of the adjacent cell;
the LTE cell information comprises surrounding large network cells and a Nanocell cell; screening out neighbor cells based on the power difference between the large network cell and the Nanocell cell, and recording the PCIs of the neighbor cells; in fig. 2(a), the nanocells adjacent to the new Nanocell are Nanocell1, Nanocell2 and Nanocell3, and the new Nanocell and the neighboring Nanocell communicate through the established X2/S1 interface; and configuring the new Nanocell as a manager role.
Step 302: respectively calculating the path loss of each neighboring Nanocell by a manager; calculating the module value of each neighbor Nanocell according to the collected PCI information of the neighbor Nanocell; judging whether the module values are occupied or not;
when the module values are all occupied by all the adjacent regions, namely the module values cannot be staggered, continuing to execute the step 303;
when the module values are judged to be staggered, executing step 309;
here, the module value of each neighboring Nanocell is obtained according to the above PCI/3 — NmodM calculation formula; in LTE, Nanocell is provided with three modulus values mod0, mod1, mod2, and the like; for a specific method for calculating the path loss, reference is made to the related description, and details are not repeated here.
Calculating the values of Nanocell1, Nanocell2 and Nanocell3 as mod0, mod1 and mod2 respectively, and continuing to execute step 303 when the module values cannot be staggered.
Step 303: determining the modulus of the Nanocell with the largest path loss with a manager as a first modulus;
here, the Nanocell with the largest path loss with the administrator, i.e., the new Nanocell, is Nanocell3, and its modulus value is mod 2.
Step 304: configuring the module value of a manager as a first module value, and selecting an idle PCI with the module value as the first module value for the manager;
here, the module value of the new Nanocell, which is a configuration manager, is mod2, and a spare PCI with the module value of mod2 is selected as the module value of the manager from PCIs 492-503 reserved for the Nanocell in advance.
Step 305: judging whether the path loss between the manager and the second Nanocell exceeds a first threshold value or not;
if yes, go to step 306;
if not, go to step 309;
here, the second Nanocell is an adjacent Nanocell having the same modulus value as the administrator, and the second Nanocell is also referred to as an administrator, and the administrator adjusts the PCI.
Step 306: the manager sends a first notification message to the managed person through an X2/S1 interface;
here, the manager recommends a module value different from itself to the managed person to suggest the managed person to update the module value.
The administrator, that is, the new Nanocell1, takes the new Nanocell1 and its measured heterogeneous neighbors, that is, nanocells 1 and 2 (the nanocells 1 and the nanocells 2 are first Nanocell groups), as the first locking set, that is, the nanocells in the first locking set are already locked, and subsequently, when the Nanocell3 is taken as the administrator to perform PCI adjustment of the administrator, the nanocells in the first locking set do not participate in the adjustment process any more.
Step 307: the manager selects a module value from the module values calculated by the manager and the module value recommended by the manager as the module value of the manager;
here, the manager measures the modulus of the peripheral nanocells, selects the modulus which the peripheral nanocells do not have or the modulus which the interference is small as the self-calculated modulus, selects a modulus with the minimum modulus interference from the self-calculated modulus and the modulus recommended by the manager as the self modulus, and selects the PCI matched with the modulus; FIG. 2(b) is a diagram showing the adjusted modulus of Nanocell 3; as shown in fig. 2(b), the modulus of the added Nanocell3 due to the new Nanocell was adjusted from mod2 to mod1 to avoid interference between nanocells.
Step 308: judging whether the managed person and the neighbor Nanocell have the modulo three interference or not;
if so, setting the role of the managed party as the role of the manager, setting the Nanocell in the adjacent region with the modulo three interference as the role of the managed party, returning to the step 302 to continue executing until all the nanocells in the indoor one capable of being subjected to PCI adjustment are completely adjusted.
If no, the process proceeds to step 309.
Here, assuming that after the administrator Nanocell3 finishes adjusting the PCI, there is modulo three interference between the Nanocell3 and the Nanocell6 adjacent to the Nanocell, the administrator Nanocell3 is used as an administrator of the next round of PCI adjustment (module value adjustment of the Nanocell 6), the Nanocell6 is used as an administrator, and the step 302 is returned to continue to be executed until all the nanocells in the first room which can perform PCI adjustment are adjusted.
In the PCI adjustment of the Nanocell6, the first locking set includes Nanocell3, Nanocell4, and Nanocell5(Nanocell4 and Nanocell5 are first Nanocell groups), that is, the nanocells in the first locking set are already locked, and then the nanocells in the first locking set do not participate in the adjustment process any more when the Nanocell6 is used as a manager. FIG. 2(c) is a schematic diagram of the adjusted modulus value of the Nanocell in the indoor unit; as shown in fig. 2(c), the modulus of Nanocell6 was adjusted from mod1 to mod 2.
Step 309: the process is ended.
In the scheme, in order to prevent the frequent adjustment of the PCI of the Nanocell, a protection time Tx is preset, the locked Nanocell with the adjusted PCI is not allowed to perform the PCI adjustment in the Tx, and the mechanism can avoid the problem that a plurality of newly-accessed Nanocells in an area start the PCI adjustment at the same time; for example, the protection time Tx may be preset to be 1 minute, and the value of Tx may also be flexibly set according to the use situation, which is not limited herein.
In the above scheme, the PCI matched with the modulus is selected, and the following rules should be observed during the selection: 1) any two adjacent cells cannot use the same PCI; 2) two nanocells using the same PCI cannot exist in all adjacent cells of the same cell; 3) PCI modulo three interference needs to be avoided between cells.
Therefore, the interference between the newly accessed Nanocell and the neighboring Nanocell can be avoided; in addition, a role definition mode (a manager and a managed person) is adopted, automatic configuration of a module value and automatic adjustment of the PCI are realized, manual participation is not needed, and human resources are saved; when the method is applied to a dense networking scene, all the Nanocells with PCI interference can be quickly adjusted in a linkage manner, so that the adjustment time is effectively shortened, and the interference is reduced.
Based on the method for configuring the Nanocell in the LTE, an embodiment of the present invention further provides a Nanocell, and fig. 4 is a schematic composition diagram of the Nanocell provided in the embodiment of the present invention, and as shown in fig. 4, the Nanocell includes: a first acquisition unit 401, a first calculation unit 402, a first determination unit 403, a first configuration unit 404; wherein,
a first obtaining unit 401, configured to obtain, in a network where the first obtaining unit is located, physical cell identity identifiers PCI of all other nanocells that are in a neighboring cell relationship with the first obtaining unit;
a first calculating unit 402, configured to calculate module values of all the other nanocells according to PCIs of all the other nanocells, and trigger a first determining unit 403 when three different module values exist in the calculated module values;
a first determining unit 403, configured to determine, in all the other nanocells, a modulus value of a Nanocell with the largest path loss with the Nanocell;
a first configuration unit 404, configured to configure a PCI matching the determined module value for itself.
Wherein, the first configuration unit 404 is further configured to:
determining the modulus of the Nanocell with the largest path loss with the Nanocell as a first modulus;
configuring the modulus value of the first Nanocell as the first modulus value;
and selecting an idle PCI with the modulus value of the first modulus value as the PCI of the network in which the PCI is positioned.
As shown in fig. 4, the Nanocell further includes: a second determining unit 405 and a first adjusting unit 406; wherein,
the second determining unit 405 is configured to determine a Nanocell with the largest path loss as a second Nanocell;
the first adjusting unit 406 is configured to adjust the PCI of the second Nanocell when it is determined that the path loss between the first Nanocell and the second Nanocell exceeds a preset first threshold, so as to reduce interference between the first Nanocell and the second Nanocell.
Wherein the first adjusting unit 406 is further configured to: sending a first notification message to a second Nanocell, wherein the first notification message carries a module value of the second Nanocell recommended by the first Nanocell to the second Nanocell; the first notification message is used for enabling the second Nanocell to select a module value from the module values calculated by the second Nanocell and the received module values as a module value of the second Nanocell, and configuring a PCI matched with the selected module value for the second Nanocell.
The first adjusting unit 406 is further configured to:
acquiring all nanocells which are in a neighboring cell relation with the nanocells and have different moduli with the nanocells in a network where the nanocells are located; determining all obtained nanocells as a first Nanocell group; the set itself and the first Nanocell group are the first locking set to avoid repeated adjustment of the PCI of the Nanocell in the first locking set.
Those skilled in the art should understand that the implementation functions of each processing unit in the Nanocell shown in fig. 4 can be understood by referring to the related description of the method for configuring the Nanocell in the LTE. Those skilled in the art will understand that the functions of each processing unit in the Nanocell shown in fig. 4 can be implemented by a program running on a processor, and can also be implemented by a specific logic circuit.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for configuring a small cell base station (NoCell) in LTE is applied to a first NoCell, and is characterized by comprising the following steps:
acquiring physical cell identity identifications (PCIs) of all other Nanocells in a neighboring cell relation with the first Nanocell in a network where the first Nanocell is located;
calculating the module values of all other nanocells according to the PCIs of all other nanocells;
when three different module values exist in the calculated module values, determining the module value of the Nanocell with the largest path loss with the first Nanocell in all other Nanocells;
and configuring the PCI matched with the determined module value for the first Nanocell.
2. The method according to claim 1, wherein the configuring the first Nanocell with the PCI matching the determined modulus value comprises:
determining the modulus of the Nanocell with the largest path loss with the first Nanocell as a first modulus;
configuring the modulus value of the first Nanocell as the first modulus value;
and selecting an idle PCI with the modulus value as the first modulus value as the PCI of the first Nanocell in the network where the first Nanocell is located.
3. The method according to claim 1 or 2, wherein after configuring the first Nanocell with the PCI matching the determined modulus value, the method further comprises:
determining the Nanocell with the largest path loss with the first Nanocell as a second Nanocell;
and when the path loss between the first Nanocell and the second Nanocell exceeds a preset first threshold value, adjusting the PCI of the second Nanocell to reduce the interference between the first Nanocell and the second Nanocell.
4. The method of claim 3, wherein the adjusting the PCI of the second Nanocell comprises:
the method comprises the steps that a first notification message is sent to a second Nanocell by the first Nanocell, wherein the first notification message carries a module value of the second Nanocell recommended to the second Nanocell by the first Nanocell, so that after the second Nanocell receives the first notification message, a module value is selected from the module value calculated by the second Nanocell and the module value recommended by the first Nanocell to serve as a module value of the second Nanocell;
and configuring the PCI matched with the selected module value for the second Nanocell.
5. The method according to claim 3, wherein when adjusting the PCI of the second Nanocell, the method further comprises:
acquiring all the Nanocells which are in the adjacent area relationship with the first Nanocell and have different module values from the first Nanocell in the network where the first Nanocell is located;
determining all obtained nanocells as a first Nanocell group;
and collecting the first Nanocell and the first Nanocell group as a first locking set so as to avoid repeated adjustment of the PCI of the nanocells in the first locking set.
6. A small cell base station Nanocell, wherein the Nanocell comprises:
the first acquisition unit is used for acquiring the physical cell identity identifications (PCI) of all other nanocells which are in the adjacent cell relation with the first acquisition unit in a network where the first acquisition unit is located;
the first calculating unit is used for calculating the module values of all other nanocells according to the PCIs of all other nanocells, and triggering the first determining unit when three different module values exist in the calculated module values;
the first determining unit is used for determining the modulus value of the Nanocell with the largest path loss with the Nanocell in all other Nanocells;
and the first configuration unit is used for configuring the PCI matched with the determined module value for the first configuration unit.
7. The Nanocell of claim 6, wherein,
the first configuration unit is further configured to:
determining the modulus of the Nanocell with the largest path loss with the Nanocell as a first modulus;
configuring the modulus value of the first Nanocell as the first modulus value;
and selecting an idle PCI with the modulus value of the first modulus value as the PCI of the network in which the PCI is positioned.
8. The Nanocell according to claim 6 or 7, further comprising: a second determining unit and a first adjusting unit; wherein,
the second determining unit is configured to determine a Nanocell with the largest path loss as a second Nanocell;
the first adjusting unit is configured to adjust the PCI of the second Nanocell when it is determined that the path loss between the first and second nanocells exceeds a preset first threshold, so as to reduce interference between the first and second nanocells.
9. The Nanocell of claim 8, wherein the first adjusting unit is further configured to:
sending a first notification message to a second Nanocell, wherein the first notification message carries a module value of the second Nanocell recommended by the first Nanocell to the second Nanocell;
the first notification message is used for enabling the second Nanocell to select a module value from the module values calculated by the second Nanocell and the received module values as a module value of the second Nanocell, and configuring a PCI matched with the selected module value for the second Nanocell.
10. The Nanocell of claim 8, wherein the first adjusting unit is further configured to:
acquiring all nanocells which are in a neighboring cell relation with the nanocells and have different moduli with the nanocells in a network where the nanocells are located;
determining all obtained nanocells as a first Nanocell group;
the set itself and the first Nanocell group are the first locking set to avoid repeated adjustment of the PCI of the Nanocell in the first locking set.
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