CN110401961B - Method, device and system for dynamically adjusting frequency - Google Patents
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Abstract
The invention provides a method, a device and a system for dynamically adjusting frequency, wherein the method comprises the following steps: according to the load information of each cell of the 4G network, evaluating the equivalent bearing flow of each service PRB of the 4G network in the current period; predicting the PRB resource demand of the 4G network of the next time period by using the equivalent bearing flow of each service PRB of the 4G network of the current time period; according to the load information of the 2G network, the traffic of the 2G network in the next time period is estimated, and further the 2G network load frequency in the next time period is obtained; and when the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period are determined to meet preset conditions, respectively carrying out frequency adjustment on the 2G network and the 4G network. Based on the setting and layout of the existing network hardware resources, the dynamic adjustment of the frequency spectrum according to the needs is realized, the 2G network and the 4G network are independently set, the risk of configuration conflict is avoided, the method has the advantages of low implementation cost, short period and the like, and the frequency spectrum utilization rate is improved.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method, an apparatus, and a system for dynamically adjusting a frequency.
Background
Along with the large-scale deployment of 4G networks by operators, high-speed and low-delay high-quality network experience is brought to a large number of users, and meanwhile, due to the increase of the number of the users and the increase of the flow consumption of a single user, the load of the 4G network is increased day by day, so that the operators can improve the network capacity by increasing 4G frequency points and bear the continuously increased user flow.
In the prior art, each time a 4G frequency point is added, a 1.4-20 MHz bandwidth is occupied, and due to limited wireless spectrum resources, operators cannot increase the 4G frequency point without limit, so that the user requirements cannot be met.
In a traditional frequency replanning mode, frequency points used by a 2G or 3G network need to be reduced, namely, the frequency spectrum bandwidth used by the 2G or 3G network is reduced, and the vacated frequency spectrum is used for 4G capacity expansion. The method belongs to static configuration, the frequency spectrum utilization rate is low, the frequency spectrum allocation of networks of different systems cannot be dynamically adjusted according to the change of user requirements, and when the 2G or 3G service volume is high, the load overload condition is easy to occur, so that the 2G or 3G user cannot normally open the service, and the user perception is sacrificed; or a dynamic frequency sharing scheme based on software defined radio can flexibly allocate network frequency spectrums of different systems, but needs to upgrade and modify network hardware, and has high implementation cost and long modification period.
Disclosure of Invention
The invention provides a method, a device and a system for dynamically adjusting frequency, which are used for realizing dynamic adjustment of frequency spectrum according to needs, and the 2G network and the 4G network are independently arranged without configuration conflict risk, so that the method, the device and the system have the advantages of low implementation cost, short period and the like, and the utilization rate of the frequency spectrum is improved.
In a first aspect, a method for dynamically adjusting a frequency provided in an embodiment of the present invention includes:
according to the load information of each cell of the 4G network, evaluating the equivalent bearing flow of each service PRB of the 4G network at the current time period;
predicting the PRB resource demand of the 4G network in the next time period according to the load information of the 4G network and the equivalent bearing flow of each service PRB of the 4G network in the current time period;
according to the load information of the 2G network, the traffic of the 2G network in the next time period is estimated, and according to the traffic of the 2G network in the next time period, the 2G network carrier frequency in the next time period is obtained;
and when the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period are determined to meet preset conditions, respectively carrying out frequency adjustment on the 2G network and the 4G network.
In one possible design, the load information of the 4G network includes a downlink PRB utilization rate, a downlink flow, a VoLTE user number, and a circuit domain fallback user number; the load information of the 2G network comprises voice telephone traffic, data service traffic, the number of data service users and the number of voice service users.
In one possible design, the calculation formula of the equivalent bearer flow per service PRB of the 4G network is as follows:
wherein T is PRB_D Representing downlink PRB equivalent bearing flow per service, N representing the total amount of 4G cells in different frequency bands under the current sector, i representing the number of the cell, i belonging to [1, N]，T i Indicates the downlink traffic, α, of the ith cell i Indicating the downlink PRB utilization, P, of a cell i Indicates the total PRB number, Ps, corresponding to the system bandwidth of the cell i The number of PRBs representing the system overhead of the cell.
In a possible design, when determining that the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period satisfy preset conditions, respectively performing frequency adjustment on the 2G network and the 4G network includes:
if the carrier frequency number of the 2G network in the next period is larger than that of the 2G network in the current period, and the preset PRB resource requirement of the 4G network in the next period is larger than that of the 4G network in the next period, carrying out frequency adjustment on the 2G network;
and if the PRB resource requirement of the 4G network in the next period is greater than that of the 4G network in the current period in the non-initial period, carrying out frequency adjustment on the 4G network.
In one possible design, the frequency adjustment of the 2G network includes:
determining the 2G network needing a tennessing frequency bandwidth delta f;
judging the effective bandwidth condition of the cell with the minimum 4G network bandwidth in the current time period;
effective bandwidth B if minimum bandwidth cell min <Delta f, the frequency bands of a plurality of 4G cells are vacated;
effective bandwidth B if minimum bandwidth cell min >Delta f, only vacating the frequency band of a single 4G cell;
deleting the minimum bandwidth cell in the 4G network;
repeating the judgment until
Wherein B is min_i Indicates the effective bandwidth of the deleted ith cell, and V indicates the number of the deleted last cell;
and increasing the frequency point of the 2G network.
In one possible design, the decision is repeated until
Then, the method further comprises the following steps:
calculating a 4G network back-off effective bandwidth of
If Δ B is not less than B band_min Adding a new 4G cell, wherein the effective bandwidth of the new 4G cell is less than or equal to the maximum bandwidth configuration of delta B, wherein B band_min Representing an effective bandwidth corresponding to a minimum system bandwidth supported in the 4G network;
and adjusting the frequency point configuration of all 4G cells, and continuously arranging the bandwidth from large to small and the frequency from low to high.
In one possible design, frequency adjustment is performed on the 4G network, including:
according to the 4G network, judging whether the frequency bandwidth of the total frequency band except the residual frequency bandwidth of the 4G network meets the requirement of the expansion of the minimum bandwidth 4G cell of the current time period to the first-level bandwidth;
if the minimum bandwidth 4G cell meeting the current time period expands the bandwidth of the first level, executing expansion, adjusting the configuration of the 4G network frequency points, and continuously arranging the frequency points according to the bandwidth from large to small and the frequency from low to high; continuously expanding until the adjusted preset PRB resource requirement of the 4G network in the next period is less than or equal to the PRB resource requirement of the 4G network in the next period, and stopping frequency adjustment;
and if the bandwidth of all the 4G cells in the current period reaches the maximum bandwidth, a new 4G cell is added, the newly added cell bandwidth is the small system bandwidth supported by the current frequency band, after the new 4G cell bandwidth is added, when the preset PRB resource requirement of the 4G network in the next period is less than or equal to the PRB resource requirement of the 4G network in the next period, the frequency adjustment is stopped, otherwise, the bandwidth expansion is executed.
And if the minimum bandwidth 4G cell which does not meet the current time interval expands the bandwidth of the previous level, stopping frequency adjustment.
In one possible design, the 4G network and the 2G network are carried by separate 4G base stations and 2G base stations, respectively.
In a second aspect, an apparatus for dynamically adjusting a frequency according to an embodiment of the present invention includes:
the evaluation module is used for evaluating the equivalent bearing flow of each service PRB of the 4G network in the current time period according to the load information of each cell of the 4G network;
the prediction module is used for predicting the PRB resource requirement of the 4G network in the next period according to the load information of the 4G network and the equivalent bearing flow of each service PRB of the 4G network in the current period;
the acquisition module is used for predicting the traffic of the 2G network in the next time period according to the load information of the 2G network and acquiring the 2G network load frequency in the next time period according to the traffic of the 2G network in the next time period;
and the adjusting module is used for respectively adjusting the frequency of the 2G network and the 4G network when the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period meet preset conditions.
In one possible design, the load information of the 4G network includes a downlink PRB utilization rate, a downlink flow, a VoLTE user number, and a circuit domain fallback user number; the load information of the 2G network comprises voice telephone traffic, data traffic, the number of data service users and the number of voice service users.
In one possible design, the calculation formula of the equivalent bearer flow per service PRB of the 4G network is as follows:
wherein T is PRB_D Representing downlink PRB equivalent bearing flow per service, N representing the total amount of 4G cells in different frequency bands under the current sector, i representing the number of the cell, i belonging to [1, N]，T i Indicates the downlink traffic, α, of the ith cell i Indicating the downlink PRB utilization, P, of a cell i Indicates the total PRB number, Ps, corresponding to the system bandwidth of the cell i The number of PRBs representing the system overhead of the cell.
In one possible design, the adjustment module is specifically configured to:
if the carrier frequency number of the 2G network in the next period is larger than that of the 2G network in the current period, and the preset PRB resource requirement of the 4G network in the next period is larger than that of the 4G network in the next period, carrying out frequency adjustment on the 2G network;
and if the PRB resource requirement of the 4G network in the next period is greater than that of the 4G network in the current period in the non-initial period, carrying out frequency adjustment on the 4G network.
In one possible design, the frequency adjustment of the 2G network includes:
determining the 2G network needing a tennessing frequency bandwidth delta f;
judging the effective bandwidth condition of the cell with the minimum 4G network bandwidth in the current time period;
effective bandwidth B if minimum bandwidth cell min <Delta f, the frequency bands of a plurality of 4G cells are vacated;
effective bandwidth B if minimum bandwidth cell min >Delta f, only vacating the frequency band of a single 4G cell;
deleting the minimum bandwidth cell in the 4G network;
repeating the judgment until
Wherein B is min_i Indicating the effective bandwidth of the deleted ith cell, and V indicating the number of the deleted last cell;
and increasing the frequency point of the 2G network.
In one possible designAfter repeating the judgment until
Then, the method further comprises the following steps:
calculating the effective bandwidth of the 4G network which can be backed off as
If Δ B is not less than B band_min Adding a new 4G cell, wherein the effective bandwidth of the new 4G cell is less than or equal to the maximum bandwidth configuration of delta B, wherein B band_min Representing an effective bandwidth corresponding to a minimum system bandwidth supported in the 4G network;
and adjusting the frequency point configuration of all 4G cells, and continuously arranging the bandwidth from large to small and the frequency from low to high.
In one possible design, the frequency adjustment of the 4G network includes:
according to the 4G network, judging whether the frequency bandwidth of the total frequency band except the residual frequency bandwidth of the 4G network meets the requirement of the expansion of the minimum bandwidth 4G cell of the current time period to the first-level bandwidth;
if the minimum bandwidth 4G cell meeting the current time period expands the bandwidth of the first level, executing expansion, adjusting the configuration of the 4G network frequency points, and continuously arranging the frequency points according to the bandwidth from large to small and the frequency from low to high; continuously expanding until the adjusted preset PRB resource requirement of the 4G network in the next period is less than or equal to the PRB resource requirement of the 4G network in the next period, and stopping frequency adjustment;
and if the bandwidth of all the 4G cells in the current period reaches the maximum bandwidth, a new 4G cell is added, the newly added cell bandwidth is the small system bandwidth supported by the current frequency band, after the new 4G cell bandwidth is added, when the preset PRB resource requirement of the 4G network in the next period is less than or equal to the PRB resource requirement of the 4G network in the next period, the frequency adjustment is stopped, otherwise, the bandwidth expansion is executed.
And if the minimum bandwidth 4G cell which does not meet the current time interval expands the bandwidth of the previous level, stopping frequency adjustment.
In one possible design, the 4G network and the 2G network are carried by separate 4G base stations and 2G base stations, respectively.
In a third aspect, a system for dynamically adjusting a frequency provided in an embodiment of the present invention includes: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of dynamic frequency adjustment of the first aspect via execution of the executable instructions.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for dynamically adjusting the rating according to the first aspect.
The invention provides a method, a device and a system for dynamically adjusting frequency, wherein the method comprises the following steps: according to the load information of each cell of the 4G network, evaluating the equivalent bearing flow of each service PRB of the 4G network at the current time period; predicting the PRB resource demand of the 4G network at the next time period by using the equivalent bearing flow of each service PRB of the 4G network at the current time period; according to the load information of the 2G network, the traffic of the 2G network in the next time period is estimated, and further the 2G network load frequency in the next time period is obtained; and when the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period are determined to meet preset conditions, respectively carrying out frequency adjustment on the 2G network and the 4G network. Based on the setting and layout of the existing network hardware resources, the dynamic adjustment of the frequency spectrum according to the needs is realized, the 2G network and the 4G network are independently set, the risk of configuration conflict is avoided, the method has the advantages of low implementation cost, short period and the like, and the frequency spectrum utilization rate is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a deployment structure of a 2G network and a 4G network in the prior art;
fig. 2 is a schematic diagram of frequency distribution of dynamic frequency adjustment according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for dynamically adjusting frequency according to an embodiment of the present invention;
fig. 4 is a flowchart of a part of a method for dynamic frequency adjustment according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for dynamically adjusting frequency according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a system for dynamically adjusting frequency according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
In a communication network, 2G and 4G base stations are usually deployed on the same physical site at the same time, each site usually consists of 3 sectors, each sector covers different directions, and each sector has a corresponding 2G sector and a corresponding 4G sector. In order to meet the network requirements of users, 1 or more 2G frequency points and 4G frequency points are set in the same sector, each 2G frequency point occupies 0.2MHz, each 4G frequency point occupies 1.4 MHz-20 MHz, and the more the number of the set frequency points is, the larger the network capacity in the sector is, the more the traffic can be carried. For example, referring to fig. 1, fig. 1 is a schematic diagram of deployment structures of a 2G network and a 4G network in the prior art, a high-load sector deploys 2 4G network frequency points and 2G network frequency points, and a non-high-load sector only needs to deploy 1 4G frequency point and 1G 2G frequency point. Generally, a fixed frequency range is defined for networks of different standards, taking the frequency range of 1830 MHz-1860 MHz as an example, 10M bandwidth which is defined to be 1830 MHz-1840 MHz is used by a 2G network, and 20M bandwidth which is defined to be 1840 MHz-1860 MHz is used by a 4G network. However, the total spectrum bandwidth of each operator is fixed, and frequency points cannot be increased without limit, so that the operators need to reasonably deploy frequency points of networks of different systems on a limited spectrum to meet user requirements.
With the continuous increase of the 4G network traffic, the method in the prior art is used for re-defining the 5M bandwidth of 1830 MHz-1835 MHz to be used by the 2G network, and defining the 25M bandwidth of 1835 MHz-1860 MHz to be used by the 4G network. Although the network requirements of users are met to a certain extent, the spectrum utilization rate is low, especially when the 4G network is idle, the original 20M bandwidth can meet the service requirements and still occupies 25M bandwidth, and meanwhile, the 2G network may form congestion due to the compressed bandwidth. Therefore, the method for dynamically adjusting the frequency can dynamically adjust the frequency allocation according to the service requirement, and improve the frequency spectrum utilization rate while meeting the service requirement.
The initial distribution state of each frequency network is obtained based on the network frequency resources existing in the existing operator, for example, 4G network bandwidth specified by 3GPP protocol seamlessly fills cells of 4G different frequencies in the frequency dimension, and 4G signals are received and transmitted by 4G base stations. In an alternative embodiment, according to the existing 4G network frequency deployment situation, the 2G network is deployed in the guard band and the white space region in different 4G cell bandwidths, wherein the 2G signal is transceived by the 2G base station, and the 2G base station is physically independent from the 4G base station. The 4G network bandwidth refers to 6 types of 1.4Hz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz, and it should be noted that different frequency ranges support different bandwidth types, for example: the Band3 frequency Band (downlink 1805 MHz-1880 MHz) supports all 6 types of bandwidth, and the Band1 frequency Band (downlink 2110 MHz-2170 MHz) supports only 4 types of bandwidth of 5MHz, 10MHz, 15MHz and 20 MHz. Seamless filling means that 4G networks with different bandwidths are continuously deployed in the existing frequency range of an operator, no spectrum blank is left, and the 4G networks are arranged according to the principle that the bandwidth is from large to small and the frequency is from low to high.
According to the 4G network frequency deployment situation, 2G network frequency points are planned in a protection frequency band and a blank frequency spectrum area in different 4G cell bandwidths, a 2G network is deployed, 2G signals are received and transmitted by a 2G base station, and the 2G base station and the 4G base station are physically independent. Fig. 2 is a schematic diagram of frequency distribution for dynamically adjusting frequency according to an embodiment of the present invention, and as shown in fig. 2, frequency points of a 2G network are deployed in protection frequency points of a 4G network.
Wherein, the guard bandwidth refers to a bandwidth within the 4G cell bandwidth but outside the 4G transmission effective bandwidth. Taking a cell with a system bandwidth of 20MHz as an example, the cell is configured with 100 PRBs (Physical Resource blocks) corresponding to the system bandwidth, each PRB is composed of 12 subcarriers with a bandwidth of 15kHz, that is, the bandwidth of each PRB is 12 × 15kHz — 180kHz, so the effective bandwidth of the cell is 180kHz — 100 — 18MHz, and at the same time, left and right guard bandwidths of 1MHz are left on the left and right sides of the spectrum. According to the above calculation method, the effective bandwidth and the protection bandwidth corresponding to different system bandwidths are as follows:
TABLE 1
The guard bandwidth is used for separating cells with different frequencies, and frequency interference among the cells is reduced. No data transmission exists in the guard band, and the power spectrum is low. The bandwidth of each frequency point of the 2G network is only 200kHz, the bandwidth is small, and the deployment position is flexible. The invention utilizes the characteristic to deploy 2G frequency points in the protection frequency band, and fully utilizes frequency spectrum resources.
In the invention, the load information of the 4G network and the load information of the 2G network can be respectively obtained according to a preset time interval, for example, 1 hour is taken as an example, the operation condition of the 4G network, for example, the load information of each cell of the 4G network, is obtained from the 4G network management platform in real time. In a 4G network, the downlink load is usually higher than the uplink load, so the load information of the 4G network is obtained by using the downlink load as an index. The load information of the 4G network includes a downlink PRB utilization rate (i.e. a ratio of an average value of the number of actually used PRBs of a 4G cell downlink physical channel to the number of available PRBs of a small physical channel in a cell in every 1ms in a current period), a downlink traffic, a number of VoLTE users, a number of circuit domain fallback users, and the like. Certainly, the embodiment is not limited thereto, and those skilled in the art perform the limitation according to the actual situation to achieve better effects.
Meanwhile, according to the same preset time interval, for example, 1 hour, the 2G network operation condition, for example, the load information of the 2G network, is obtained in real time from the 2G network management platform, where the 2G load information may include voice traffic, data traffic, the number of data service users, the number of voice service users, and the like.
Fig. 3 is a flowchart of a method for dynamically adjusting a frequency according to an embodiment of the present invention, as shown in fig. 3, the method in this embodiment may include:
s101, according to the load information of each cell of the 4G network, evaluating the equivalent bearing flow of each service PRB of the 4G network in the current period.
Specifically, each service PRB equivalent bearer flow is used as an index for evaluating the bearer capability of the 4G network in the current sector, and the index is closely related to the wireless network environment and the traffic variation, so that the index is different in different sectors and changes with the traffic variation.
Calculating the equivalent bearing flow of each service PRB in the current time period sector according to the combined downlink flow of the 4G cells in different frequency bands in the same sector, wherein the calculation specifically comprises the following formula I:
wherein T is PRB_D Representing the equivalent bearing flow of each downlink service PRB, N representing the total amount of 4G cells in different frequency bands under the current sector, i representing the number of a specific cell, i belonging to [1, N]，T i Indicates the downlink traffic, α, of the ith cell i Indicates the downlink PRB utilization, P, of the cell i Indicates the total PRB number (see Table 1), Ps, corresponding to the system bandwidth of the cell i The number of PRBs indicating the system overhead of the cell is, in particular, PRBs used for not carrying actual user traffic, such as a synchronization signal and a control channel, which are defined in a communication protocol.
Two periods T that can be considered adjacent in the present invention PRB_D Substantially similar, and therefore directly using T of the current time period PRB_D The next time period network is evaluated.
S102, predicting the PRB resource requirement of the 4G network in the next period according to the load information of the 4G network and the equivalent bearing flow of each service PRB of the 4G network in the current period.
Specifically, the PRB resource demand of the next time period 4G network is predicted by using formula two:
wherein the symbols
Denotes rounding up, T i_current Indicates the flow of each 4G cell under the sector at the current time, G t Represents a network utilization threshold of 0<G t <1。L t Threshold representing PRB utilization rate, value range, meaning and G thereof t Similarly.
The 4G user number growth factor is the next time, and can be generated by historical data of a plurality of statistical cycle periods, which is obtained by calculation according to the following formula six.
S103, predicting the traffic of the 2G network in the next time period according to the load information of the 2G network, and acquiring the carrier frequency of the 2G network in the next time period according to the traffic of the 2G network in the next time period.
The strategy of dynamic frequency adjustment can realize that under the condition of ensuring that the 4G network is not congested, the occupied condition of the 4G network frequency spectrum is reduced, the frequency is emptied to increase the frequency point of the 2G network, so that whether the frequency adjustment needs to be carried out in the next time period or not needs to be judged, wherein the frequency adjustment needs to be carried out in the next time period, specifically,
according to the load information of the 2G network, the voice service volume E of the 2G network in the next period is estimated v_next And data traffic E d_next Specifically, the estimation is carried out by using the following formula three and formula four:
wherein E v_current Characterizing the voice traffic in the current time period, E d_current Characterizing the traffic volume, u, of a data service in a current time period 4G_current And u 2G_current Respectively representing the number of 4G users and the number of 2G users in the current time period,
and ω next Respectively a 4G user number growth factor and a 2G voice service user number growth factor, eta at the next moment next For the next moment 2G data service user number growth factor, gamma volte For VoLTE user proportion, ε 2G The user ratio of voice call back to 2G in the 4G users that do not support the VoLTE function in the Circuit Switched Fallback (CSFB) mode is shown, and the user ratio is used to eliminate the user that falls back to the 3G network in the CSFB mode. The voice service of the VoLTE user is still carried by the 4G network, and the voice communication is carried out without occupying the resources of the 2G or 3G network.
And growth factor
ω next 、η next For predicting the number of users in the next period, a growth factor may be generated from historical data for a plurality of statistical period periods
For example, if the current time is backward pushed m weeks ahead as a statistical period, it is obtained by calculation using formula five:
f (-) represents a preset specific calculation mode,
representing the actual 4G user number increase factor in the same period of the week, e.g. predicting the 4G user number increase factor in the 16 o' clock period of the week relative to the 15 period, then
The algorithm is the value of the number of users in 16 o' clock period on the last week (i.e. last week) divided by the number of users in 4G 15 clock period. It should be noted that the increase factor may be a value less than 1.
Indicating a back-off of the actual 4G user number growth factor for the second week. In an alternative embodiment
Can be obtained by adopting the formula six:
and acquiring the 2G network carrier frequency in the next time period according to the estimation, and specifically calculating by a formula seven:
wherein G is t Represents a network utilization threshold of 0<G t <1。G t The method is used for reserving partial allowance for 2G network resources, if the value is set to be too low, the wireless resources are easily wasted due to too much reservation, and if the value is set to be too high, the reserved resources are too few, the scheduling of burst services is influenced, and the service perception of a user is deteriorated. c. C BCCH Indicates the number of BCCH channels, c SDCCH Representing the number of SDCCH channels, c CCCH Indicating the number of CCCH channels. BCCH (Broadcast Control Channel), SDCCH (Stand-Alone Dedicated Control Channel), CCCH (common Control Channel). K represents the amount of traffic that each channel can carry. The setting range in this embodiment may be 0.7 to 0.8, but is not limited thereto.
In the embodiment of the present invention, the order of S102 and S103 is not limited to achieve a better implementation effect.
And S104, when the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period meet preset conditions, respectively carrying out frequency adjustment on the 2G network and the 4G network.
Specifically, if the carrier frequency number of the 2G network in the next period is greater than the carrier frequency number of the 2G network in the current period, and the preset PRB resource requirement of the 4G network in the next period is greater than the PRB resource requirement of the 4G network in the next period, performing frequency adjustment on the 2G network;
and if the PRB resource requirement of the 4G network in the next period is greater than that of the 4G network in the current period in the non-initial period, carrying out frequency adjustment on the 4G network.
In this embodiment, when the condition n is satisfied f_next >n f_current And a 4G frequency adjustment scheme exists such that
When the network is established, the network needs to adjust the frequency.
And representing the quantity of the 4G network PRB resource demands obtained after the preset simulated adjustment scheme. Wherein n is f_current Representing the number of current 2G frequency points,
the required quantity of the 4G network PRB resources is adjusted by a preset and simulated adjusting scheme.
When the carrier frequency number of the 2G network meets the preset conditions, the 2G network needs to increase frequency points, and the frequency adjustment scheme of the system for dynamically adjusting the frequency enables the network to meet the capacity requirements of the 4G network and the 2G network at the same time.
In a real network, the number of 4G users is greater than the number of 2G network users, so in some optional embodiments, the capacity of the 4G network is preferentially adjusted.
In a certain non-initial period, if the 4G network
It is determined that the network needs frequency adjustment. In the present embodiment, the capacity of the 4G network is preferentially guaranteed, and therefore, in this case, the capacity requirement of the 2G network is not considered.
The embodiment does not need to upgrade and transform the hardware of the existing network, can use the existing 2G equipment of an operator in a waste utilization mode, has no configuration conflict risk due to independent setting of 2G and 4G networks, is low in implementation cost and short in period, realizes dynamic adjustment of frequency spectrum according to needs, and improves the frequency spectrum utilization rate compared with the traditional frequency re-tillage.
Fig. 4 is a flowchart of a part of a method for dynamic frequency adjustment according to a second embodiment of the present invention, and as shown in fig. 4, in this embodiment, if it is determined that the PRB resource requirements of the 4G network in the next period and the carrier frequency number of the 2G network in the next period satisfy preset conditions, frequency adjustment is performed on the 2G network and the 4G network respectively.
Specifically, the frequency adjustment of the 2G network may include:
s201: determining a 2G network required vacation frequency bandwidth delta f;
s202: judging the effective bandwidth condition of the cell with the minimum 4G network bandwidth in the current time period;
s203: effective bandwidth B if minimum bandwidth cell min <Delta f, the frequency bands of a plurality of 4G cells are vacated;
s204: effective bandwidth B if minimum bandwidth cell min >Delta f, only vacating the frequency band of a single 4G cell;
s205: repeating the judgment until
Wherein B is min_i Indicating the effective bandwidth of the deleted ith cell, and V indicating the number of the deleted last cell;
s206: and increasing the frequency point of the 2G network.
In a mobile communication network, under the influence of the filtering performance of a 2G network device and the like, continuous and seamless arrangement of 2G frequency points may cause network interference, and under the condition, a protection frequency band is required to be reserved between the 2G frequency points, so that the interference value is reduced.
When determining that the number of carrier frequencies of the 2G network in the next time interval meets the preset condition, in this embodiment, it is first determined by calculation that the 2G network needs to vacate the frequency bandwidth Δ f (unit: MHz), and refer to formula (eight):
wherein, σ is used for characterizing the extra spectrum occupation ratio required by the 2G system for separating different cells, and when σ is 0, 2G can be seamlessly and continuously deployed.
Step 202: judging the effective bandwidth condition of the current 4G network cell with the minimum bandwidth, namely the effective bandwidth B of the cell with the minimum bandwidth min <Δ f, frequency band required to vacate a plurality of 4G cells:
1) deleting the 4G cell from the current sector, and if a plurality of cells with consistent bandwidths exist and are the cells with the minimum bandwidth of the sector, deleting the cells from the cells with larger frequency according to the frequency;
2) repeating step 1) until
Wherein B is min_i Indicates the effective bandwidth of the i-th cell to be deleted, and V indicates the last cell number to be deleted.
Or, if the effective bandwidth B of the minimum bandwidth cell min >Δ f, only the frequency band of a single 4G cell needs to be vacated:
and deleting the 4G cell from the current sector, and if a plurality of cells with consistent bandwidths and the smallest bandwidth of the sector exist, deleting the cells from the larger frequency cell according to the frequency size.
And step 203, deleting the minimum bandwidth cell in the 4G network, and if a plurality of cells with consistent bandwidths exist and are the minimum bandwidth cell of the sector, deleting the cells from the larger frequency cell according to the frequency size.
Step 204: repeating the judgment until
Wherein B is min_i Indicates the effective bandwidth of the i-th cell to be deleted and V indicates the last cell number to be deleted.
Step 205: and increasing the frequency point of the 2G network.
Adjusting the frequency of the 4G network specifically comprises the following steps:
s211: according to the 4G network, judging whether the frequency bandwidth of the total frequency band except the 4G network meets the requirement of the minimum bandwidth of the current time period, namely the expansion of the 4G cell to the first-level bandwidth;
s212: if the minimum bandwidth 4G cell meeting the current time period expands the bandwidth to the first level, executing expansion, adjusting the configuration of the 4G network frequency points, and continuously arranging according to the bandwidth from large to small and the frequency from low to high; continuously expanding until the adjusted preset PRB resource requirement of the next-period 4G network is less than or equal to the PRB resource requirement of the next-period 4G network, and stopping frequency adjustment;
s213: and if the bandwidth of all the 4G cells in the current period reaches the maximum bandwidth, a new 4G cell is added, the newly added cell bandwidth is the small system bandwidth supported by the current frequency band, after the new 4G cell bandwidth is added, when the PRB resource requirement of the next period 4G network is less than or equal to the PRB resource requirement of the next period 4G network, the frequency adjustment is stopped, otherwise, the bandwidth expansion is executed.
S214: and if the minimum bandwidth 4G cell which does not meet the current time interval expands the bandwidth of the previous level, stopping frequency adjustment.
In this embodiment, when determining that the PRB resource requirements of the 4G network in the next period meet the preset conditions, frequency adjustment is performed on the 4G network, specifically, step 211: judging whether the residual frequency bandwidth on the total frequency band except the 4G network meets the requirement of the current minimum bandwidth 4G cell on the upward first-level bandwidth expansion, if so, entering the step 212), otherwise, stopping frequency adjustment:
step 212: and if the minimum bandwidth 4G cell in the current time period meets the requirement of bandwidth expansion to the previous level, executing bandwidth expansion, and adjusting the configuration of all 4G network frequency points to ensure that the 4G network frequency bands are continuous and are continuously arranged according to the bandwidth from large to small and the frequency from low to high. Bandwidth expansion of course needs to be done at the expense of reducing the 2G frequency points.
Step 213: judging the adjusted condition
If true, the frequency adjustment is stopped, otherwise, the process returns to step 211.
Step S214: and if the minimum bandwidth 4G cell which does not meet the current time interval expands the bandwidth of the previous level, stopping frequency adjustment.
In an alternative embodiment, the determination is repeated until
Then, the method further comprises the following steps:
calculating the effective bandwidth of the 4G network which can be backed off as
If Δ B is not less than B band_min Adding a new 4G cell, wherein the effective bandwidth of the new 4G cell is less than or equal to the maximum bandwidth configuration of delta B, wherein B band_min Representing an effective bandwidth corresponding to a minimum system bandwidth supported in the 4G network;
and adjusting the frequency point configuration of all 4G cells, and continuously arranging the bandwidths from large to small and the frequencies from low to high.
Referring to fig. 4, in this embodiment, by obtaining initial states of a 2G network and a 4G network, cells with different 4G frequencies are continuously and seamlessly filled in an existing frequency band, the 2G network is deployed in a guard band and a white space region in the frequency band of the different 4G cells, and then load information of each cell of the 4G network and load information of the 2G network are obtained from network management by the network management, and by evaluating an equivalent bearer flow of each service PRB of the 4G network in a current period, it is finally determined that PRB resource requirements of the 4G network in a next period and carrier frequency number of the 2G network in the next period meet preset conditions, and the 2G network and the 4G network are respectively adjusted. The method and the device can meet the actual requirements of users, realize the frequency dynamic scheduling between the 2G network and the 4G network with lower complexity, and have strong operability. Compared with the existing method and technology, the existing network does not need to be upgraded and modified, the existing 2G equipment of an operator can be used, the 2G network and the 4G network are independently arranged, the configuration conflict risk is avoided, the implementation cost is low, the period is short, the frequency spectrum can be dynamically adjusted according to the requirement, and the frequency spectrum utilization rate is improved compared with the traditional frequency re-tillage.
Because the 4G network and the 2G network are respectively borne by the independent 4G base station and the independent 2G base station, the 2G frequency point is configured in the 4G guard band, frequency overlapping cannot occur, and system alarm is generated, the original 2G base station of an operator can be fully utilized, and network transformation is not needed. Here, the modification means that the original 2G network is removed, 4G hardware devices are upgraded and corresponding license is purchased (i.e. licensed), so that the software defined radio is supported, the 2G and 4G common mode co-location is supported, i.e. the same physical device is used for transmitting 2G and 4G signals simultaneously.
Fig. 5 is a schematic structural diagram of a device for dynamically adjusting frequency according to a third embodiment of the present invention, and as shown in fig. 5, the device for dynamically adjusting frequency in this embodiment may include:
the evaluation module 31 is configured to evaluate an equivalent bearer flow of each service PRB of the 4G network in the current time period according to the load information of each cell of the 4G network;
the prediction module 32 is configured to predict PRB resource requirements of the 4G network in the next period according to load information of the 4G network and an equivalent bearer flow of each service PRB of the 4G network in the current period;
the obtaining module 33 is configured to predict traffic of the 2G network in the next time period according to the load information of the 2G network, and obtain the 2G network load frequency in the next time period according to the traffic of the 2G network in the next time period;
the adjusting module 34 is configured to respectively perform frequency adjustment on the 2G network and the 4G network when determining that the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period meet preset conditions.
In one possible design, the load information of the 4G network includes a downlink PRB utilization rate, a downlink flow, a VoLTE user number, and a circuit domain fallback user number; the load information of the 2G network comprises voice telephone traffic, data service traffic, the number of data service users and the number of voice service users.
In one possible design, the calculation formula of the equivalent bearer flow per service PRB of the 4G network is as follows:
wherein T is PRB_D Indicating the equivalent bearing flow of PRB of each service in downlink, and N indicating the difference under the current sectorThe total number of frequency band 4G cells, i represents the number of the cell, i belongs to [1, N ]]，T i Indicates the downlink traffic, α, of the ith cell i Indicating the downlink PRB utilization, P, of a cell i Indicates the total PRB number, Ps, corresponding to the system bandwidth of the cell i The number of PRBs representing the system overhead of the cell.
In one possible design, the adjustment module 34 is specifically configured to:
if the carrier frequency number of the 2G network in the next period is larger than that of the 2G network in the current period, and the preset PRB resource requirement of the 4G network in the next period is larger than that of the 4G network in the next period, carrying out frequency adjustment on the 2G network;
and if the PRB resource requirement of the 4G network in the next period is greater than that of the 4G network in the current period in the non-initial period, carrying out frequency adjustment on the 4G network.
In one possible design, the frequency adjustment for the 2G network includes:
determining the Tendeng frequency bandwidth delta f needed by the 2G network;
judging the effective bandwidth condition of the cell with the minimum 4G network bandwidth in the current time period;
effective bandwidth B if minimum bandwidth cell min <Delta f, the frequency bands of a plurality of 4G cells are vacated;
effective bandwidth B if minimum bandwidth cell min >Delta f, only vacating the frequency band of a single 4G cell;
deleting the minimum bandwidth cell in the 4G network;
repeating the judgment until
Wherein B is min_i Indicates the effective bandwidth of the deleted ith cell, and V indicates the number of the deleted last cell;
and increasing the frequency point of the 2G network.
In one possible design, the decision is repeated until
Then, the method further comprises the following steps:
calculating the effective bandwidth of the 4G network which can be backed off as
If Δ B is not less than B band_min Adding a 4G cell, wherein the effective bandwidth of the added 4G cell is less than or equal to the maximum bandwidth configuration of delta B, wherein B band_min Representing an effective bandwidth corresponding to a minimum system bandwidth supported in the 4G network;
and adjusting the frequency point configuration of all 4G cells, and continuously arranging the bandwidth from large to small and the frequency from low to high.
In one possible design, the frequency adjustment for the 4G network includes:
according to the 4G network, judging whether the frequency bandwidth of the total frequency band except the 4G network meets the requirement of the minimum bandwidth of the current time period, namely the expansion of the 4G cell to the first-level bandwidth;
if the minimum bandwidth 4G cell meeting the current time period expands the bandwidth to the first level, executing expansion, adjusting the configuration of the 4G network frequency points, and continuously arranging according to the bandwidth from large to small and the frequency from low to high; continuously expanding until the adjusted preset PRB resource requirement of the next-period 4G network is less than or equal to the PRB resource requirement of the next-period 4G network, and stopping frequency adjustment;
and if the bandwidth of all the 4G cells in the current period reaches the maximum bandwidth, a new 4G cell is added, the newly added cell bandwidth is the small system bandwidth supported by the current frequency band, after the new 4G cell bandwidth is added, when the PRB resource requirement of the next period 4G network is less than or equal to the PRB resource requirement of the next period 4G network, the frequency adjustment is stopped, otherwise, the bandwidth expansion is executed.
And if the minimum bandwidth 4G cell which does not meet the current time interval expands the bandwidth of the previous level, stopping frequency adjustment.
In one possible design, the 4G network and the 2G network are carried by separate 4G base stations and 2G base stations, respectively.
The device for dynamically adjusting frequency of this embodiment may execute the technical solution in the method shown in fig. 3, and for the specific implementation process and technical principle, reference is made to the relevant description in the method shown in fig. 3, which is not described herein again.
Fig. 6 is a schematic structural diagram of a system for dynamically adjusting frequency according to a fourth embodiment of the present invention, and as shown in fig. 6, the system 40 for dynamically adjusting frequency according to this embodiment may include: a processor 41 and a memory 42.
A memory 42 for storing a computer program (e.g., an application program, a functional module, etc. implementing the above-described method for dynamically adjusting the frequency), computer instructions, etc.;
the computer programs, computer instructions, etc. described above may be stored in one or more memories 42 in partitions. And the above-mentioned computer program, computer instructions, data, etc. can be called by the processor 41.
A processor 41 for executing the computer program stored in the memory 42 to implement the steps of the method according to the above embodiments.
Reference may be made in particular to the description relating to the preceding method embodiment.
The processor 41 and the memory 42 may be separate structures or may be an integrated structure integrated together. When the processor 41 and the memory 42 are separate structures, the memory 42 and the processor 41 may be coupled by a bus 43.
The server in this embodiment may execute the technical solutions in the methods shown in fig. 3 and fig. 4, and the specific implementation process and technical principle of the server refer to the relevant descriptions in the methods shown in fig. 3 and fig. 4, which are not described herein again.
The invention can realize the frequency dynamic scheduling between the 2G network and the 4G network with lower complexity according to the actual requirements of users, and has strong operability. Compared with the prior art, the method of the invention does not need to upgrade and transform the hardware of the prior network, can use the existing 2G equipment of an operator, has the advantages of independent arrangement of 2G and 4G networks, no configuration conflict risk, low implementation cost and short period, realizes dynamic adjustment of the frequency spectrum according to the requirement, and improves the utilization rate of the frequency spectrum compared with the prior frequency re-tillage.
In addition, embodiments of the present application further provide a computer-readable storage medium, in which computer-executable instructions are stored, and when at least one processor of the user equipment executes the computer-executable instructions, the user equipment performs the above-mentioned various possible methods.
Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in a communication device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for dynamic adjustment of frequency, comprising:
according to the load information of each cell of the 4G network, evaluating the equivalent bearing flow of each service PRB of the 4G network at the current time period;
predicting the PRB resource demand of the 4G network in the next time period according to the load information of the 4G network and the equivalent bearing flow of each service PRB of the 4G network in the current time period;
wherein, the calculation formula of each service PRB equivalent bearer flow of the 4G network is as follows:
wherein T is PRB_D Representing downlink PRB equivalent bearing flow per service, N representing the total amount of 4G cells in different frequency bands under the current sector, i representing the number of the cell, i belonging to [1, N]，T i Indicates the downlink traffic, α, of the ith cell i Indicating the downlink PRB utilization, P, of a cell i Indicates the total PRB number, Ps, corresponding to the system bandwidth of the cell i A number of PRBs representing a system overhead of the cell;
according to the load information of the 2G network, the traffic of the 2G network in the next time period is estimated, and according to the traffic of the 2G network in the next time period, the 2G network carrier frequency in the next time period is obtained;
and when the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period are determined to meet preset conditions, respectively carrying out frequency adjustment on the 2G network and the 4G network.
2. The method of claim 1, wherein the load information of the 4G network includes downlink PRB utilization, downlink traffic, VoLTE user number, and circuit switched fallback user number; the load information of the 2G network comprises voice telephone traffic, data traffic, the number of data service users and the number of voice service users.
3. The method of claim 1, wherein when it is determined that the PRB resource requirements of the 4G network in the next time period and the carrier frequency number of the 2G network in the next time period satisfy preset conditions, respectively performing frequency adjustment on the 2G network and the 4G network comprises:
if the carrier frequency number of the 2G network in the next period is larger than that of the 2G network in the current period, and the preset PRB resource requirement of the 4G network in the next period is larger than that of the 4G network in the next period, carrying out frequency adjustment on the 2G network;
and if the PRB resource requirement of the 4G network in the next period is greater than that of the 4G network in the current period in the non-initial period, carrying out frequency adjustment on the 4G network.
4. The method of claim 3, wherein performing frequency adjustment on the 2G network comprises:
determining the 2G network needing a tennessing frequency bandwidth delta f;
judging the effective bandwidth condition of the cell with the minimum 4G network bandwidth in the current time period;
effective bandwidth B if minimum bandwidth cell min If the frequency band is less than delta f, the frequency bands of a plurality of 4G cells are moved;
effective bandwidth B if minimum bandwidth cell min If the frequency band is larger than delta f, only the frequency band of a single 4G cell is moved;
deleting the minimum bandwidth cell in the 4G network;
repeating the judgment until
Wherein B is min_i Indicates the effective bandwidth of the deleted ith cell, and V indicates the number of the deleted last cell;
and increasing the frequency point of the 2G network.
5. The method of claim 4, wherein the determining is repeated until the determining is completed
Then, the method further comprises the following steps:
calculating the effective bandwidth of the 4G network which can be backed off as
If Δ B is not less than B band_min Adding a new 4G cell, wherein the effective bandwidth of the new 4G cell is less than or equal to the maximum bandwidth configuration of delta B, wherein B band_min Representing an effective bandwidth corresponding to a minimum system bandwidth supported in the 4G network;
and adjusting the frequency point configuration of all 4G cells, and continuously arranging the bandwidth from large to small and the frequency from low to high.
6. The method of claim 3, wherein performing frequency adjustment on the 4G network comprises:
according to the 4G network, judging whether the frequency bandwidth of the total frequency band except the residual frequency bandwidth of the 4G network meets the requirement of the expansion of the minimum bandwidth 4G cell of the current time period to the first-level bandwidth;
if the minimum bandwidth 4G cell meeting the current time period expands the bandwidth of the first level, executing expansion, adjusting the configuration of the 4G network frequency points, and continuously arranging the frequency points according to the bandwidth from large to small and the frequency from low to high; continuously expanding until the adjusted preset PRB resource requirement of the 4G network in the next period is less than or equal to the PRB resource requirement of the 4G network in the next period, and stopping frequency adjustment;
if the bandwidth of all 4G cells in the current time period reaches the maximum bandwidth, a new 4G cell is added, the newly added cell bandwidth is a small system bandwidth supported by the current frequency band, after the new 4G cell bandwidth is added, when the preset PRB resource requirement of the 4G network in the next time period is less than or equal to the PRB resource requirement of the 4G network in the next time period, the frequency adjustment is stopped, otherwise, the bandwidth expansion is executed;
and if the minimum bandwidth 4G cell which does not meet the current time interval expands the bandwidth of the previous level, stopping frequency adjustment.
7. The method according to any of claims 1-6, wherein the 4G network and the 2G network are carried by separate 4G base stations and 2G base stations, respectively.
8. An apparatus for dynamically adjusting frequency, comprising:
the evaluation module is used for evaluating the equivalent bearing flow of each service PRB of the 4G network in the current time period according to the load information of each cell of the 4G network;
the prediction module is used for predicting the PRB resource requirement of the 4G network in the next period according to the load information of the 4G network and the equivalent bearing flow of each service PRB of the 4G network in the current period;
wherein, the calculation formula of each service PRB equivalent bearer flow of the 4G network is as follows:
wherein T is PRB_D Representing downlink PRB equivalent bearing flow per service, N representing the total amount of 4G cells in different frequency bands under the current sector, i representing the number of the cell, i belonging to [1, N]，T i Indicates the downlink traffic, α, of the ith cell i Indicating the downlink PRB utilization, P, of a cell i Indicates the total PRB number, Ps, corresponding to the system bandwidth of the cell i A number of PRBs representing a system overhead of the cell;
the acquisition module is used for predicting the traffic of the 2G network in the next time period according to the load information of the 2G network and acquiring the 2G network load frequency in the next time period according to the traffic of the 2G network in the next time period;
and the adjusting module is used for respectively adjusting the frequency of the 2G network and the 4G network when the PRB resource requirement of the 4G network in the next period and the carrier frequency number of the 2G network in the next period meet preset conditions.
9. A system for dynamic adjustment of frequency, comprising: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of dynamic frequency adjustment of any of claims 1-7 via execution of the executable instructions.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method for dynamic adjustment of a frequency of any one of claims 1 to 7.
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