CN101494871A - Planning method for micro district construction - Google Patents
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Abstract
The invention discloses a micro-cell construction planning method, which comprises: determining the first pilot frequency signal to noise ratio parameter of the micro-cell and the first foreign interference factor while the micro-cell does not perform pilot frequency emission; under the condition that the micro-cell performs pilot frequency emission, measuring the second foreign interference factor of the micro-cell, and comparing the first foreign interference factor and the second foreign interference factor; under the condition that the micro-cell does not perform pilot frequency emission, measuring the second pilot frequency signal to noise ratio parameter of the macro-cell, and comparing the first pilot frequency signal to noise ratio parameter and the second pilot frequency signal to noise ratio parameter; and judging whether the micro-cell meets the request of entering the network covered by the macro-cell according to the comparing result. Applying the invention can judge whether the current configuration of the micro-cell meets the predetermined interference requirement when planning to introduce a micro-cell into a macro-cell, thereby, facilitates network planning.
Description
Technical Field
The present invention relates to the field of communications, and in particular to a planning method for the construction of microcells, which can be applied in scenarios where microcells are added to a network covered by macrocells.
Background
Conventional cellular networks are formed by macro cells (macrocells), each cell having a coverage radius of mostly 0.5km to 25 km. Macro cells are generally used in the initial stages of network establishment to address the problem of wide coverage with small traffic volumes.
The coverage radius of a Microcell (Microcell) is about 30-1000 m, the transmitting power is low, the transmission is mainly carried out along the sight line of a street, and the leakage of signals on the roof is low. Therefore, microcells are often used to increase radio coverage, eliminating "blind spots" in macrocells. Picocells with smaller transmit power also exist as a complementary form of network coverage, and are mainly used to solve the communication problem of indoor "hot spots" in business centers, conference centers, and the like.
In order to meet the capacity and coverage requirements of hot spots, microcells may be used as a complement to macrocells, i.e. coverage is met by macrocells and capacity is met by microcells, forming a network structure consisting of hybrid cells. Such a wireless network, in which a large part of a service area is composed of both macro cells and micro cells, is generally referred to as an hcs (hierarchical cell structure) hierarchical cell structure.
The spectrum allocation may affect the network topology and HCS applications of WCDMA. Theoretically, an operator who has access to a pair of carriers can only build a single cell layer to provide service. If two pairs of carrier frequencies are available, a two-layer structure of cell layers can be constructed, such as a layer of macro cell, a layer of micro cell or pico cell. Under the condition of spectrum resources and the invaluity thereof, the use of same-frequency multiplexing in the layered cells has great significance and advantages.
In network construction, a single-carrier frequency macro cell coverage is generally constructed first. The capacity is then increased using the second carrier frequency. The second carrier frequency can be added in the macro cell layer to create a dual-carrier frequency macro cell site, and a micro cell layer can also be established. Operators generally have only two pairs of carrier frequencies, and in order to build a full coverage communication network, one carrier frequency already used in another layer has to be multiplexed to the cells of the layer. Because WCDMA is an FDD system and an interference-limited system, under the condition of insufficient isolation, co-frequency station building can have a large impact on the existing network, but also on the newly-built network, and interference feedback can be generated between two layers of networks, which is obviously not favorable for stable and efficient operation of the system.
It is easy to see that the frequency reuse of the HCS can be considered when building the network, and the most important is to avoid excessive uplink and downlink interference so as to improve the network performance. Therefore, a carrier frequency of a macro cell layer is selectively set to be reused by a micro cell base station, and the micro cell base station should be far away from the macro cell base station as far as possible or has larger physical isolation, so that the interference can be controlled at a reasonable level, and the blind clearance and capacity increase problems are solved for a newly-built station.
However, in the related art, there is no effective judgment scheme for judging whether a network composed of existing macro cells will affect the joined micro cells, and parameters are adjusted after the existing macro cells are actually joined into the micro cells, which obviously consumes much manpower and material resources.
Disclosure of Invention
The present invention is made in view of the above problems, and therefore a main object of the present invention is to provide a planning scheme for micro cell construction to determine interference caused by a macro cell to an added micro cell, and further determine whether the micro cell can be added to a network composed of macro cells.
According to the embodiment of the invention, a planning method for micro cell construction is provided, which is applied to a scene that a micro cell is added into a network covered by a macro cell.
The method comprises the following steps: determining a first pilot signal-to-noise ratio parameter of the micro cell and a first external interference factor under the condition that the micro cell does not transmit pilot; under the condition that the micro cell carries out pilot frequency transmission, measuring a second external interference factor of the micro cell, and comparing the first external interference factor with the second external interference factor; under the condition that the micro cell can not transmit the pilot frequency, measuring a second pilot frequency signal-to-noise ratio parameter of the macro cell, and comparing the first pilot frequency signal-to-noise ratio parameter with the second pilot frequency signal-to-noise ratio parameter; and judging whether the micro cell meets the requirement of joining the network covered by the macro cell or not according to the comparison result.
Wherein the first alien interference factor is determined by the following formula:
Wherein M is the number of R99 users of the microcell, alpha is the traffic channel power ratio of the microcell, gamma is a predetermined orthogonality factor, rho is the traffic chip level target signal-to-noise ratio of the microcell, pathloss _ dB is the path loss of the microcell, N0 is the user equipment side thermal noise of the microcell, PBSAnd xi is the maximum transmission power of the base station, and xi is the first external interference factor.
Under the condition that the micro cell performs pilot frequency transmission, whether a second external interference factor meets a first preset condition is judged, and under the condition that the first preset condition is met, the micro cell meets the requirement of being added into a network covered by the macro cell is judged, wherein the first preset condition is as follows: bxξ < ξ "< ξ, where B is a predetermined value and 0 < B < 1, ξ is a first extraneous interference factor and ξ" is a second extraneous interference factor.
In this case, in the case where the microcell does not meet the requirement of joining in the network covered by the macrocell, design-related parameters of the microcell are adjusted, the design-related parameters including: antenna transmission power, pilot frequency transmission power and antenna angle of the micro cell.
In addition, the first pilot signal-to-noise ratio parameter includes a pilot power threshold and a pilot signal-to-noise ratio threshold, and the second pilot signal-to-noise ratio parameter includes a pilot power and a pilot signal-to-noise ratio.
And, specifically, under the condition that the micro cell is unable to perform pilot transmission, determining whether the second pilot signal-to-noise ratio parameter satisfies a second predetermined condition, and under the condition that the second predetermined condition is satisfied, determining that the micro cell meets the requirement of joining the network covered by the macro cell, where the second predetermined condition is: the pilot signal-to-noise ratio threshold is greater than the pilot signal-to-noise ratio, and the total power threshold is greater than the total power.
And when measuring the second pilot signal-to-noise ratio parameter of the macro cell, selecting the largest pilot signal-to-noise ratio in the multiple pilot signal-to-noise ratios obtained by measurement and the pilot total power ratio corresponding to the largest pilot signal-to-noise ratio as the second pilot signal-to-noise ratio parameter.
According to another embodiment of the present invention, a planning method for micro cell construction is provided, which is applied to a scenario in which a micro cell is added to a network covered by a macro cell.
The method comprises the following steps: under the condition that the micro cell does not transmit pilot frequency, acquiring a first external interference factor of the micro cell according to a preset system parameter of the micro cell; under the condition that the micro cell carries out pilot frequency transmission, measuring a second external interference factor of the micro cell; and comparing the first external interference factor with the second external interference factor, and judging whether the micro cell meets the requirement of joining the network covered by the macro cell or not according to the comparison result.
Wherein the first alien interference factor is determined by the following formula:
Wherein the predetermined system parameters include the following in equation 1: m is the number of R99 users of the microcell, alpha is the traffic channel power ratio of the microcell, gamma is a predetermined orthogonality factor, rho is the traffic chip level target signal-to-noise ratio of the microcell, pathollss _ dB is the path loss of the microcell, N0 is the user equipment side thermal noise of the microcell, PBSAnd xi is the maximum transmission power of the base station, and xi is the first external interference factor.
And under the condition that the micro cell carries out pilot frequency transmission, judging whether the second external interference factor meets a preset condition, and under the condition that the second external interference factor meets the preset condition, judging that the micro cell meets the requirement of joining the network covered by the macro cell, wherein the preset condition is as follows: bxξ < ξ "< ξ, where B is a predetermined value and 0 < B < 1, ξ is a first extraneous interference factor and ξ" is a second extraneous interference factor.
Further, in a case where the micro cell does not meet a requirement for joining in the network covered by the macro cell, the method further includes: adjusting design related parameters of the micro cell, re-measuring a second external interference factor after adjustment, and judging whether the re-measured second external interference factor meets a preset condition; and under the condition that the adjustment times reach a preset value and the second external interference factor measured after each adjustment cannot reach a preset condition, judging that the micro cell cannot be added into the network covered by the macro cell.
Wherein designing the relevant parameters comprises: antenna transmission power, pilot frequency transmission power, antenna angle and common channel overhead of the micro cell.
Through the technical scheme of the invention, when the micro cell is introduced into the macro cell for planning, whether the current configuration of the micro cell meets the preset interference requirement can be determined, thereby facilitating the planning of the network.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a planning method for micro cell construction according to a first embodiment of the method of the present invention;
fig. 2 is a flowchart of an example of a process of a planning method for micro cell construction according to a first embodiment of the method of the present invention;
fig. 3 is a detailed flowchart of a processing example of a planning method for micro cell construction according to a first embodiment of the method of the present invention; and
fig. 4 is a flowchart of a planning method for micro cell construction according to a second embodiment of the method of the present invention
Detailed Description
Method embodiment one
In this embodiment, a planning method for micro cell construction is provided, which is applied to a scenario in which a micro cell is added to a network covered by a macro cell.
As shown in fig. 1, the planning method for micro-cell construction according to the present embodiment includes: step S102, determining a first pilot signal-to-noise ratio parameter of the micro cell and a first external interference factor under the condition that the micro cell does not transmit pilot; step S104, under the condition that the micro cell transmits the pilot frequency, measuring a second external interference factor of the micro cell, and comparing the first external interference factor with the second external interference factor; step S106, under the condition that the micro cell can not transmit the pilot frequency, measuring a second pilot frequency signal-to-noise ratio parameter of the macro cell, and comparing the first pilot frequency signal-to-noise ratio parameter with the second pilot frequency signal-to-noise ratio parameter; and step S108, judging whether the micro cell meets the requirement of joining the network covered by the macro cell or not according to the comparison result.
Wherein the first alien interference factor is determined by the following formula:
Wherein M is the number of R99 users of the microcell, alpha is the traffic channel power ratio of the microcell, gamma is a predetermined orthogonality factor, rho is the traffic chip level target signal-to-noise ratio of the microcell, pathloss _ dB is the path loss of the microcell, N0 is the user equipment side thermal noise of the microcell, PBSAnd xi is the maximum transmission power of the base station, and xi is the first external interference factor.
Under the condition that the micro cell performs pilot frequency transmission, whether a second external interference factor meets a first preset condition is judged, and under the condition that the first preset condition is met, the micro cell meets the requirement of being added into a network covered by the macro cell is judged, wherein the first preset condition is as follows: bxξ < ξ "< ξ, where B is a predetermined value and 0 < B < 1, ξ is a first extraneous interference factor and ξ" is a second extraneous interference factor.
In this case, in the case where the microcell does not meet the requirement of joining in the network covered by the macrocell, design-related parameters of the microcell are adjusted, the design-related parameters including: antenna transmission power, pilot frequency transmission power and antenna angle of the micro cell.
In addition, the first pilot signal-to-noise ratio parameter includes a pilot power threshold and a pilot signal-to-noise ratio threshold, and the second pilot signal-to-noise ratio parameter includes a pilot power and a pilot signal-to-noise ratio.
And, specifically, under the condition that the micro cell is unable to perform pilot transmission, determining whether the second pilot signal-to-noise ratio parameter satisfies a second predetermined condition, and under the condition that the second predetermined condition is satisfied, determining that the micro cell meets the requirement of joining the network covered by the macro cell, where the second predetermined condition is: the pilot signal-to-noise ratio threshold is greater than the pilot signal-to-noise ratio, and the total power threshold is greater than the total power.
And when measuring the second pilot signal-to-noise ratio parameter of the macro cell, selecting the largest pilot signal-to-noise ratio in the multiple pilot signal-to-noise ratios obtained by measurement and the pilot total power ratio corresponding to the largest pilot signal-to-noise ratio as the second pilot signal-to-noise ratio parameter.
Fig. 2 shows the processing steps in the course of the practical application of the method. As shown in fig. 2, the method specifically includes:
and (1) determining the position of a newly-built Micro cell expected in the HCS layered networking, and the expected coverage radius and capacity requirement of the Micro cell. According to the WCDMA conventional network planning method, Micro cell planning parameters such as link budget, the number of equivalent voice users, power configuration of the Micro cell and the like are determined. And determining information such as an external interference factor and the like of the area according to the actual network condition. The specific parameters are shown in the following table:
| parameter symbol | Meaning of parameters | Value taking |
| M | R99 number of users, e.g. number of speech users | Is preset with |
| α | Traffic channel power ratio | 80％ |
| γ | Orthogonality factor | Usually 0.6 |
| ρ | Target signal-to-noise ratio at certain service chip level | For example, for R99 voice service, EbNo takes 7.1dB, and ρ is 7.1dB minus the processing gain. |
| pathloss_dB | Path loss of subscriber location | 110～145dB |
| N0 | UE side thermal noise | -103dBm |
| ξ | Extraneous interference factor | Relating to interference in the planned area |
| PBS | Maximum transmission power of base station | Macro base station 43 dBm; micro base station 37 dBm; picocells 27 dBm; |
TABLE 1
Step (2), obtaining an external interference factor xi in the Micro area according to a WCDMA downlink capacity formula and parameters such as the planning capacity M, the coverage radius pathollss _ dB and the like determined in the step (1); if the external interference factor in the Micro area is smaller than and close to the xi value after the network is built, the Micro performance can meet the planning requirement;
Step (3), measuring an external interference value xi' of an actual network under an actual external field environment by adopting methods of placing a pilot frequency transmitter in a Mirco cell and the like; if 0.8 Xxi < xi' < xi, then the Micro planning is considered to be reasonable and effective, and the planning process is finished. Otherwise, executing the step (4);
if the external field test conditions of a Mirco pilot transmitter and the like are not met, the pilot quality of surrounding Macro base stations received in the Micro cell can be obtained in a drive test mode, and compared with the experience value of system simulation, whether the planning standard can be met or not is judged. If the current planning process can be reached, the planning process is ended;
and (4) modifying related parameters (planning parameters) of the Micro cell, and executing the step (2) again for circulation until a reasonable planning result is obtained.
And (4) if no reasonable result can be obtained after multiple times of adjustment and circulation in a reasonable Micro cell parameter configuration range in the step (4), judging that the area covered by the macro cell is not suitable for establishing the Micro cell.
Fig. 3 shows a detailed flow of a processing example of the method according to the present embodiment. As shown in fig. 3, the method specifically includes the following steps:
step 301, according to the network construction requirement, determining the position of a newly-built Micro cell, the predicted coverage radius and the capacity requirement, and after determining the information, performing step 302;
step 305, in the Micro planning area, testing to obtain the signal-to-noise ratio Ec/Io of the pilot channel of the surrounding Macro cells, finding out the strongest Macro Ec/Io, and simultaneously recording the Ec value thereof, and then performing step 308.
And step 306, actually measuring the external field to obtain pilot intensity Ec values of the Micro cell and the adjacent Macro cells in the Micro planning area, and calculating a value of an external interference factor xi ". Then step 307 is performed;
whether the strongest one Macro Ec/Io is less than the simulation experience value, i.e., the pilot snr threshold described above (e.g., may be-12 dB), and at the same time the Ec value is less than the simulation experience value, i.e., less than the pilot power threshold (e.g., may be-90 dBm), step 308; if yes, the planning is finished, and a Micro cell can be established according to the existing planning parameters; if not, judging that the micro cell cannot be added into the network covered by the macro cell;
Method embodiment two
In this embodiment, a planning method for micro cell construction is provided, which is applied to a scenario in which a micro cell is added to a network covered by a macro cell.
As shown in fig. 4, the planning method for micro-cell construction according to the present embodiment includes: step S402, under the condition that the micro cell does not transmit pilot frequency, obtaining a first external interference factor of the micro cell according to the preset system parameter of the micro cell; step S404, under the condition that the micro cell transmits the pilot frequency, measuring a second external interference factor of the micro cell; step S406, comparing the first external interference factor with the second external interference factor, and determining whether the micro cell meets the requirement of joining the network covered by the macro cell according to the comparison result.
Wherein the first alien interference factor is determined by the following formula:
Wherein, in advanceThe system parameters include the following parameters in equation 1: m is the number of R99 users of the microcell, alpha is the traffic channel power ratio of the microcell, gamma is a predetermined orthogonality factor, rho is the traffic chip level target signal-to-noise ratio of the microcell, pathloss _ dB is the path loss of the microcell, N0 is the user equipment side thermal noise of the microcell, PBSAnd xi is the maximum transmission power of the base station, and xi is the first external interference factor.
And under the condition that the micro cell carries out pilot frequency transmission, judging whether the second external interference factor meets a preset condition, and under the condition that the second external interference factor meets the preset condition, judging that the micro cell meets the requirement of joining the network covered by the macro cell, wherein the preset condition is as follows: bxξ < ξ "< ξ, where B is a predetermined value and 0 < B < 1, ξ is a first extraneous interference factor and ξ" is a second extraneous interference factor.
Further, in a case where the micro cell does not meet a requirement for joining in the network covered by the macro cell, the method further includes: adjusting design related parameters of the micro cell, re-measuring a second external interference factor after adjustment, and judging whether the re-measured second external interference factor meets a preset condition; and under the condition that the adjustment times reach a preset value and the second external interference factor measured after each adjustment cannot reach a preset condition, judging that the micro cell cannot be added into the network covered by the macro cell.
Wherein designing the relevant parameters comprises: antenna transmission power, pilot frequency transmission power, antenna angle and common channel overhead of the micro cell.
In summary, the present invention can determine whether the current configuration of the Micro cell meets the predetermined interference requirement when planning the co-frequency Micro cell introduced into the wide coverage network of the Macro cell existing in the WCDMA system, thereby facilitating the planning of the network.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A planning method for micro cell construction is applied to a scene of adding a micro cell to a network covered by a macro cell, and is characterized in that the method comprises the following steps:
determining a first pilot signal-to-noise ratio parameter of the micro cell and a first external interference factor under the condition that the micro cell does not transmit pilot;
under the condition that the micro cell conducts pilot frequency transmission, measuring a second external interference factor of the micro cell, and comparing the first external interference factor with the second external interference factor; under the condition that the micro cell can not transmit pilot frequency, measuring a second pilot frequency signal-to-noise ratio parameter of the macro cell, and comparing the first pilot frequency signal-to-noise ratio parameter with the second pilot frequency signal-to-noise ratio parameter;
and judging whether the micro cell meets the requirement of joining the network covered by the macro cell or not according to the comparison result.
2. The method of claim 1, wherein the first alien interference factor is determined by the following formula:
Wherein,m is the number of R99 users of the microcell, alpha is the traffic channel power proportion of the microcell, gamma is a preset orthogonality factor, rho is the traffic chip level target signal-to-noise ratio of the microcell, Pathloss _ dB is the path loss of the microcell, and N is0Side thermal noise of user equipment of the microcell, RBSAnd xi is the maximum transmission power of the base station, and xi is the first external interference factor.
3. The method according to claim 1, wherein in a case where the micro cell performs pilot transmission, it is determined whether the second alien interference factor satisfies a first predetermined condition, and in a case where the first predetermined condition is satisfied, it is determined that the micro cell meets a requirement for joining in a network covered by the macro cell, and the first predetermined condition is:
bxξ < ξ "< ξ, where B is a predetermined value and 0 < B < 1, ξ is the first extraneous interference factor and ξ" is the second extraneous interference factor.
4. A method according to claim 2 or 3, characterized in that in case the microcell does not fulfill the requirement of joining in the network covered by the macrocell, design related parameters of the microcell are adjusted, said design related parameters comprising: the antenna transmitting power, the pilot frequency transmitting power and the antenna angle of the micro cell.
5. The method of claim 1, wherein the first pilot SNR parameter comprises a pilot power threshold and a pilot SNR threshold, and wherein the second pilot SNR parameter comprises a pilot power and a pilot SNR.
6. The method as claimed in claim 5, wherein in a case where the micro cell is unable to perform pilot transmission, determining whether the second pilot signal-to-noise ratio parameter satisfies a second predetermined condition, and in a case where the second predetermined condition is satisfied, determining that the micro cell meets a requirement for joining the network covered by the macro cell, where the second predetermined condition is:
the pilot signal-to-noise ratio threshold is greater than the pilot signal-to-noise ratio, and the total power threshold is greater than the total power.
7. The method of claim 5, wherein a pilot SNR with the highest measurement gain among the plurality of pilot SNRs and a corresponding total power ratio is selected as the second pilot SNR parameter when measuring the second pilot SNR parameter of the macro cell.
8. A planning method for micro cell construction is applied to a scene of adding a micro cell to a network covered by a macro cell, and is characterized in that the method comprises the following steps:
under the condition that the micro cell does not transmit pilot frequency, acquiring a first external interference factor of the micro cell according to predetermined system parameters of the micro cell;
measuring a second external interference factor of the micro cell under the condition that the micro cell conducts pilot frequency transmission;
and comparing the first external interference factor with the second external interference factor, and judging whether the micro cell meets the requirement of joining the network covered by the macro cell according to the comparison result.
9. The method of claim 8, wherein the first alien interference factor is determined by the following formula:
Wherein the predetermined system parameters include the following in equation 1: m is the number of R99 users of the microcell, alpha is the traffic channel power proportion of the microcell, gamma is a preset orthogonality factor, rho is the traffic chip level target signal-to-noise ratio of the microcell, Pathloss _ dB is the path loss of the microcell, and N is0Is the user equipment side thermal noise of the microcell, PBSAnd xi is the maximum transmission power of the base station, and xi is the first external interference factor.
10. The method according to claim 8, wherein in a case where the micro cell performs pilot transmission, determining whether the second alien interference factor satisfies a predetermined condition, and in a case where the predetermined condition is satisfied, determining that the micro cell meets a requirement for joining a network covered by the macro cell, the predetermined condition being:
bxξ < ξ "< ξ, where B is a predetermined value and 0 < B < 1, ξ is the first extraneous interference factor and ξ" is the second extraneous interference factor.
11. The method of claim 10, wherein in case the micro cell does not fulfill a requirement for joining in the network covered by the macro cell, further comprising:
adjusting design related parameters of the micro cell, re-measuring a second external interference factor after adjustment, and judging whether the re-measured second external interference factor meets the predetermined condition;
when the adjustment times reach a preset value and a second external interference factor measured after each adjustment cannot reach the preset condition, judging that the micro cell cannot be added into the network covered by the macro cell;
wherein the design-related parameters include: the antenna transmitting power, the pilot frequency transmitting power, the antenna angle and the common channel overhead of the micro cell.
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| WO2011079479A1 (en) * | 2010-01-04 | 2011-07-07 | 上海贝尔股份有限公司 | Method and system for resource scheduling |
| CN102598771A (en) * | 2010-01-04 | 2012-07-18 | 上海贝尔股份有限公司 | Method and system for resource scheduling |
| CN102598771B (en) * | 2010-01-04 | 2013-12-25 | 上海贝尔股份有限公司 | Method and system for resource scheduling |
| CN102026356A (en) * | 2010-09-29 | 2011-04-20 | 新邮通信设备有限公司 | Method for setting power of small base station in heterogeneous network |
| CN102469603A (en) * | 2010-11-09 | 2012-05-23 | 财团法人资讯工业策进会 | Cooperative apparatus and resource block allocation method thereof for use in wireless network |
| CN102469603B (en) * | 2010-11-09 | 2014-12-10 | 智易科技股份有限公司 | Cooperative apparatus and resource block allocation method thereof for use in wireless network |
| CN110149690A (en) * | 2013-01-30 | 2019-08-20 | 索尼公司 | Communication control unit, communication control method and terminal device |
| CN110149690B (en) * | 2013-01-30 | 2022-09-13 | 索尼公司 | Communication control device, communication control method, and terminal device |
| WO2015176258A1 (en) * | 2014-05-21 | 2015-11-26 | 华为技术有限公司 | Capacity expansion method and device for wireless network |
| CN107689877A (en) * | 2016-08-03 | 2018-02-13 | 中兴通讯股份有限公司 | A kind of parameter regulation means and device |
| CN106131872A (en) * | 2016-08-08 | 2016-11-16 | 上海斐讯数据通信技术有限公司 | A kind of system and method in order to wireless gateway device covering performance is compared |
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