CN108271197B - LTE capacity analysis method and device - Google Patents
LTE capacity analysis method and device Download PDFInfo
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- CN108271197B CN108271197B CN201611258259.1A CN201611258259A CN108271197B CN 108271197 B CN108271197 B CN 108271197B CN 201611258259 A CN201611258259 A CN 201611258259A CN 108271197 B CN108271197 B CN 108271197B
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Abstract
The invention relates to an LTE capacity analysis method and device, wherein the method comprises the following steps: determining the average number of effective RRC logical connections of the current network; performing direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and the current network capacity expansion standard; judging whether the target cell needs direct capacity expansion according to the result of the direct capacity expansion analysis and a preset standard; and if judging that the target cell does not need direct capacity expansion, carrying out VoLTE traffic volume pre-expansion analysis on the target cell which does not need direct capacity expansion. The LTE capacity analysis method and the LTE capacity analysis device can effectively analyze the number of active users in the environment with concurrent words and numbers, further can accurately predict the impact of VoLTE telephone traffic on LTE resources, can realize that a capacity expansion scheme is made in advance to avoid network congestion, and further improve user perception.
Description
Technical Field
The invention relates to the technical field of communication services, in particular to an LTE capacity analysis method and device.
Background
From 2014, the LTE user scale tends to be stable, and the large LTE user cannot grow in a short period. However, with the large-scale commercial use of the VoLTE service, the LTE network will step into the age of coexistence of speech and number, and it is expected that a large number of LTE users will open the VoLTE service. The VoLTE is used as a voice service borne in a PS domain, has the highest scheduling priority, has equal uplink and downlink resource requirements, and is not suitable for an LTE network in an era with coexistence of speech and number under the influence of large-scale commercial VoLTE and based on a pure data service. In order to more effectively analyze the capacity of the LTE network in the era of coexistence of speech and data, it is necessary to more effectively analyze the number of active users of speech and data services and predict the traffic scale of the VoLTE in advance in response to the impact of the VoLTE service on the network capacity.
At present, the industry does not have a mature and unified network capacity analysis scheme based on coexistence of words, and the existing network mainly judges whether the capacity analysis after introduction of the VoLTE is based on the effective RRC connection average, the utilization rate of the uplink PRB and the downlink PRB, the uplink flow and the downlink flow, the VoLTE traffic change and other dimensions, and the capacity expansion threshold is reached. From the prior art for the reference index of capacity analysis after the introduction of VoLTE, the drawbacks of the prior art include:
in the prior art, the analysis of the number of active users in an environment with concurrent languages does not consider the relevant characteristics of the VoLTE (especially the bearer establishment characteristics of the VoLTE), that is, the influence of the existing 4G user on the network capacity caused by the call (using the VoLTE) on the 4G network is not fully considered; in addition, in the prior art, only consideration is given to whether the real-time channel occupation of the current network reaches the capacity expansion threshold, and no advance prediction analysis is performed on the capacity for the future growth of the VOLTE users (including the transfer of 2G and 3G users to 4G and the opening of VOLTE calls by the current 4G users), so that the capacity expansion scheme cannot be made in advance to avoid network congestion, and the user perception is poor.
Disclosure of Invention
Aiming at the defects that the existing LTE capacity analysis scheme is imperfect, and the capacity expansion scheme cannot be established in advance to avoid network congestion, so that the user perception is poor, the invention provides the following technical scheme:
one aspect of the present invention provides an LTE capacity analysis method, including:
determining the average number of effective RRC logical connections of the current network;
performing direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and the current network capacity expansion standard;
judging whether the target cell needs direct capacity expansion according to the result of the direct capacity expansion analysis and a preset standard;
and if judging that the target cell does not need direct capacity expansion, carrying out VoLTE traffic volume pre-expansion analysis on the target cell which does not need direct capacity expansion.
Optionally, the method further comprises determining the present network effective RRC logical connection average according to the following equation (1):
the average number of active RRC logical connections is equal to the average number of active RRC connections [ (QCI ═ 1 average active ERAB number + QCI ═ 9 average active ERAB number)/QCI ═ 9 average active ERAB number ]. (1)
Optionally, the preset criteria include:
the number of effective RRC users reaches the user number threshold, the downlink utilization rate reaches the utilization rate threshold, and the downlink flow reaches the flow threshold; or the like, or, alternatively,
the number of effective RRC users reaches the user number threshold, the uplink utilization rate reaches the utilization rate threshold, and the uplink flow reaches the flow threshold.
Optionally, the performing, in advance, capacity expansion analysis on VoLTE traffic of the target cell that does not need direct capacity expansion includes:
determining whether the target cell meets VoLTE traffic volume pre-expansion conditions or not according to the pre-expansion analysis result;
and if the target cell meets the VoLTE traffic volume pre-expansion condition, performing pre-expansion early warning on the target cell.
Optionally, the performing, in advance, capacity expansion analysis on VoLTE traffic of the target cell that does not need direct capacity expansion includes:
based on 2G and 3G voice Ireland erl concepts, VoLTE traffic volume pre-expansion analysis is carried out on a target cell which does not need direct expansion.
Optionally, the performing, based on 2G and 3G voice ireland erl concepts, VoLTE traffic volume pre-expansion analysis on the target cell that does not need direct expansion further includes:
determining the number of VoLTE voice channels that the remaining PRBs can simultaneously support based on the 2G and 3G voice erl concepts;
according to the rounded VoLTE voice channel number which can be simultaneously supported by the remaining PRB, inquiring erl-B table to determine the VoLTE voice traffic volume which can be supported by the remaining PRB;
determining and predicting newly added voice traffic of VoLTE according to the average number of effective RRC connections, the average number of activated ERAB (best quality indicator) of QCI (equal to 1), the average number of activated ERAB (best quality indicator) of QCI (equal to 9), the conversion coefficient of a newly opened VOLTE (voice over long term evolution) user predicted by a 4G user and the traffic of 2G and 3G voice migration; wherein:
the 2G and 3G voice migration traffic is GSM cell traffic migration coefficient + TD-SCDMA cell traffic TD-SCDMA traffic migration coefficient; (3)
and determining whether the target cell should be subjected to capacity expansion early warning or not according to the comparison result of the VoLTE voice traffic which can be supported by the residual PRB and the predicted VoLTE newly-increased voice traffic.
In another aspect, the present invention further provides an LTE capacity analysis apparatus, including:
a logical connection determining unit, configured to determine an effective RRC logical connection average of a current network;
a direct capacity expansion analysis unit, configured to perform direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and a current network capacity expansion standard;
a direct capacity expansion judging unit, configured to judge whether the target cell needs to be directly expanded according to a result of the direct capacity expansion analysis and a preset standard;
and the pre-expansion analysis unit is used for carrying out pre-expansion analysis on the VoLTE telephone traffic of the target cell which does not need direct expansion when judging that the target cell does not need direct expansion.
Optionally, the pre-expansion analysis unit is specifically configured to determine whether the target cell meets a VoLTE traffic pre-expansion condition according to a result of the pre-expansion analysis, and perform pre-expansion warning on the target cell when the target cell meets the VoLTE traffic pre-expansion condition.
Optionally, the pre-expansion analysis unit is further configured to perform VoLTE traffic pre-expansion analysis on the target cell that does not need to be directly expanded based on 2G and 3G voice irish erl concepts.
Optionally, the pre-expansion analysis unit is further configured to:
determining the number of VoLTE voice channels that the remaining PRBs can simultaneously support based on the 2G and 3G voice erl concepts;
according to the rounded VoLTE voice channel number which can be simultaneously supported by the remaining PRB, inquiring erl-B table to determine the VoLTE voice traffic volume which can be supported by the remaining PRB;
determining and predicting newly added voice traffic of VoLTE according to the average number of effective RRC connections, the average number of activated ERAB (best quality indicator) of QCI (equal to 1), the average number of activated ERAB (best quality indicator) of QCI (equal to 9), the conversion coefficient of a newly opened VOLTE (voice over long term evolution) user predicted by a 4G user and the traffic of 2G and 3G voice migration; wherein:
the 2G and 3G voice migration traffic is GSM cell traffic migration coefficient + TD-SCDMA cell traffic TD-SCDMA traffic migration coefficient; (3)
and determining whether the target cell should be subjected to capacity expansion early warning or not according to the comparison result of the VoLTE voice traffic which can be supported by the residual PRB and the predicted VoLTE newly-increased voice traffic.
According to the LTE capacity analysis method and device, the average number of the effective RRC logical connections of the current network is determined, the target cell is subjected to direct capacity expansion analysis according to the average number of the effective RRC logical connections and the current network capacity expansion standard, whether the target cell needs to be subjected to direct capacity expansion is judged according to the result of the direct capacity expansion analysis and the preset standard, so that when the target cell is judged to be not required to be subjected to direct capacity expansion, VoLTE traffic pre-expansion analysis is carried out on the target cell which does not need to be subjected to direct capacity expansion, the active user number analysis under the environment with concurrent speech numbers can be effectively carried out, the impact of the VoLTE traffic on LTE resources can be accurately predicted, a capacity expansion scheme can be formulated in advance to avoid network congestion, and user perception 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 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 flowchart illustrating an LTE capacity analysis method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an LTE capacity analysis method according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating a VoLTE traffic volume pre-expansion analysis method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an LTE capacity analysis apparatus according to an 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 described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, 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.
As mentioned above, at present, the industry does not have a mature unified network capacity analysis scheme based on coexistence of words, and the existing network mainly judges whether the capacity analysis after introduction of VoLTE is based on the effective RRC connection average, the uplink and downlink PRB utilization rate, the uplink and downlink traffic, VoLTE traffic change and other dimensions, and reaches the capacity expansion threshold. The main flow capacity expansion standard is as follows, wherein the standard is determined according to the cell classification of large, medium and small packets, when the cell self-busy (single cell is actually busy every day) reaches the threshold, the carrier frequency capacity expansion is implemented, and the cell classification standard and the capacity expansion threshold are as shown in the following table one:
table-cell classification standard and capacity expansion threshold
When the cell meets any one of the following standards, the cell is defined as a cell needing direct capacity expansion:
"the number of valid RRC users reaches a threshold and the downlink utilization reaches a threshold (PDSCH or PDCCH) and the downlink traffic reaches a threshold" or "the number of valid RRC users reaches a threshold and the uplink utilization reaches a threshold and the uplink traffic reaches a threshold.
Wherein, the calculation mode of the average number of the effective RRC connections of the current network is shown in the following table two:
method for calculating average number of effective RRC connections in representation-two network
Therefore, in the prior art, the analysis of the number of active users in an environment with coexistence of the number of languages does not consider the relevant characteristics of VoLTE, and although the number of users for performing VoLTE voice call at the current stage is not large, users for activating VoLTE will be more and more along with the promotion and popularization of VoLTE by operators. Therefore, the impact of existing 4G users talking on the 4G network (using VOLTE) on the network capacity needs to be considered. In addition, in the prior art, only consideration is given to whether the real-time channel occupation of the existing network reaches the capacity expansion threshold, and no advance prediction analysis is performed on the capacity based on the future increase of the VOLTE users (including the transfer of 2G and 3G users to 4G, and the existing 4G users open VOLTE calls) to make a capacity expansion scheme in advance, that is, network congestion cannot be avoided.
Based on the above, the invention provides an LTE capacity analysis method under the environment with coexisting words and numbers, and the defects of the existing algorithm are effectively overcome through the calculation of the average number of effective RRC logical connections and the prediction algorithm of VoLTE telephone traffic erl.
Fig. 1 is a schematic flow chart of an LTE capacity analysis method according to an embodiment of the present invention, and as shown in fig. 1, the method includes:
s1: determining the average number of effective RRC logical connections of the current network;
specifically, the average number of active RRC connections (i.e. the number of active RRC users) in the current network is defined as: recording the number of effective RRC connections by taking 100ms as a period, and taking the average value of each period; within every 100ms, if any E-RAB related to a certain RRC has data transmission, the RRC connection is considered to be valid (see the performance measurement ERAB. Session TimeUE of 3GPP TS 32.425);
the characteristics of the establishment of the VoLTE service ERAB load: the voice over lte service needs to establish 1 3 ERABs (video service needs to add an ERAB with QCI of 2) with QCI of 9 and QCI of 5, and these three ERABs will share 1 RRC connection;
analyzing the influence of the introduced VoLTE service on the number of effective RRC connections: as can be known from the definition of the average number of effective RRC connections, if any ERAB has data traffic within 100ms, the RRC corresponding to the ERAB will be recorded as an effective RRC, and QCI 9 is not only a default bearer (a basic bearer for all services), but also bears a certain data service, and when the voice and data services are concurrent, the effective RRC connection number remains unchanged;
on this basis, the current network effective RRC logical connection average may be determined according to the following equation (1):
the average number of active RRC logical connections is equal to the average number of active RRC connections [ (QCI ═ 1 average active ERAB number + QCI ═ 9 average active ERAB number)/QCI ═ 9 average active ERAB number ]. (1)
The calculation method of the relevant parameters or indexes related to the above formula (1) is described as shown in the following table three:
table description of the manner of calculation of the three relevant parameters or indices
S2: performing direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and the current network capacity expansion standard;
specifically, the capacity expansion standard of the existing network according to this embodiment may be as shown in table four below.
Table four-cell classification standard and capacity-expanding threshold
When the cell meets any one of the standards, the cell is defined as a cell needing direct capacity expansion:
"the number of valid RRC users reaches the threshold, and the downlink utilization reaches the threshold (PDSCH or PDCCH), and the downlink traffic reaches the threshold"; or, the "number of valid RRC users reaches the threshold, the uplink utilization rate reaches the threshold, and the uplink traffic reaches the threshold.
S3: judging whether the target cell needs direct capacity expansion according to the result of the direct capacity expansion analysis and a preset standard;
s4: and if judging that the target cell does not need direct capacity expansion, carrying out VoLTE traffic volume pre-expansion analysis on the target cell which does not need direct capacity expansion.
Specifically, performing pre-expansion analysis on VoLTE traffic by means of 2G and 3G voice erl concepts for cells which do not meet the direct expansion threshold; if the cell meets the VoLTE traffic volume pre-expansion analysis condition after analysis, pre-expansion early warning is carried out, and an expansion scheme is formulated; and if the cell does not meet the VoLTE traffic volume pre-expansion analysis condition through analysis, ending the capacity analysis.
In the LTE capacity analysis method of this embodiment, by determining the average number of valid RRC logical connections in the current network, performing direct capacity expansion analysis on the target cell according to the average number of valid RRC logical connections and the current network capacity expansion standard, and determining whether the target cell needs to be directly expanded according to the result of the direct capacity expansion analysis and the preset standard, when it is determined that the target cell does not need to be directly expanded, performing VoLTE traffic pre-capacity expansion analysis on the target cell that does not need to be directly expanded, so that the active user number analysis in an environment where the speech numbers coexist can be effectively performed, and then the impact of the VoLTE traffic on LTE resources can be accurately predicted, and it is possible to implement a capacity expansion scheme to be made in advance to avoid network congestion, thereby improving user perception.
Further, as a preferable example of the foregoing method, the performing, in step S4, VoLTE traffic volume pre-expansion analysis on the target cell that does not need direct expansion may include:
based on 2G and 3G voice Ireland erl concepts, VoLTE traffic volume pre-expansion analysis is carried out on a target cell which does not need direct expansion.
On this basis, the performing VoLTE traffic volume pre-expansion analysis on the target cell without direct expansion based on the 2G and 3G voice ireland erl concepts may further include:
determining the number of VoLTE voice channels that the remaining PRBs can simultaneously support based on the 2G and 3G voice erl concepts;
according to the rounded VoLTE voice channel number which can be simultaneously supported by the remaining PRB, inquiring erl-B table to determine the VoLTE voice traffic volume which can be supported by the remaining PRB;
determining and predicting newly added voice traffic of VoLTE according to the average number of effective RRC connections, the average number of activated ERAB (best quality indicator) of QCI (equal to 1), the average number of activated ERAB (best quality indicator) of QCI (equal to 9), the conversion coefficient of a newly opened VOLTE (voice over long term evolution) user predicted by a 4G user and the traffic of 2G and 3G voice migration; wherein:
the 2G and 3G voice migration traffic is GSM cell traffic migration coefficient + TD-SCDMA cell traffic TD-SCDMA traffic migration coefficient; (3)
and determining whether the target cell should be subjected to capacity expansion early warning or not according to the comparison result of the VoLTE voice traffic which can be supported by the residual PRB and the predicted VoLTE newly-increased voice traffic.
The present invention is described below with reference to a specific example, but the scope of the present invention is not limited thereto.
Fig. 2 is a flowchart illustrating an LTE capacity analysis method according to another embodiment of the present invention; as shown in fig. 2, the method includes two parts, namely, direct capacity expansion analysis in an environment where the number of words in the current network cell is coexistent, and pre-capacity expansion analysis for VoLTE traffic brought by the large development of VoLTE service, and includes the specific steps of:
a1: determining an effective RRC logical connection average number by combining the characteristics of VoLTE service bearer establishment;
a2: performing direct capacity expansion analysis on the cell according to the effective RRC logical connection average and the current network capacity expansion standard (the capacity expansion standard is shown in the fourth table);
when the cell meets any one of the standards, the cell is defined as a cell needing direct capacity expansion:
"the number of valid RRC users reaches the threshold, and the downlink utilization reaches the threshold (PDSCH or PDCCH), and the downlink traffic reaches the threshold"; or, the "number of valid RRC users reaches the threshold, the uplink utilization rate reaches the threshold, and the uplink traffic reaches the threshold.
Specifically, the average number of active RRC connections (i.e. the number of active RRC users) in the current network is defined as: recording the number of effective RRC connections by taking 100ms as a period, and taking the average value of each period; within every 100ms, if any E-RAB related to a certain RRC has data transmission, the RRC connection is considered to be valid (see the performance measurement ERAB. Session TimeUE of 3GPP TS 32.425);
the characteristics of the establishment of the VoLTE service ERAB load: the voice over lte service needs to establish 1 3 ERABs (video service needs to add an ERAB with QCI of 2) with QCI of 9 and QCI of 5, and these three ERABs will share 1 RRC connection;
analyzing the influence of the introduced VoLTE service on the number of effective RRC connections: as can be known from the definition of the average number of effective RRC connections, if any ERAB has data traffic within 100ms, the RRC corresponding to the ERAB will be recorded as an effective RRC, and QCI 9 is not only a default bearer (a basic bearer for all services), but also bears a certain data service, and when the voice and data services are concurrent, the effective RRC connection number remains unchanged;
on this basis, the current network effective RRC logical connection average may be determined according to the following equation (1):
the average number of active RRC logical connections is equal to the average number of active RRC connections [ (QCI ═ 1 average active ERAB number + QCI ═ 9 average active ERAB number)/QCI ═ 9 average active ERAB number ]. (1)
The calculation method of the relevant parameters or indexes related to the above formula (1) is described as shown in the third table.
It will be appreciated that starting from the UE attached (Attach) network, a bearer must be established, which is the default bearer. The default bearer is created when the UE attaches to the network and remains active until the UE detaches from the network (Detach) (i.e. LTE provides an "always on" IP connection for the UE), and QCI 9 is the basic bearer for all services as the default bearer.
A3: and carrying out pre-expansion analysis on the VoLTE traffic by means of 2G and 3G voice erl concepts aiming at the cells which do not meet the direct expansion threshold.
Specifically, if the cell is analyzed to meet the condition of VoLTE traffic volume pre-expansion analysis, pre-expansion early warning is performed, and an expansion scheme is formulated;
and ending the capacity analysis if the cell is not satisfied by the analysis.
Specifically, fig. 3 shows a flow of the VoLTE traffic volume pre-expansion analysis method according to an embodiment of the present invention. The uplink and downlink resource requirements of the VoLTE service are symmetrical, and the uplink is limited, so that the uplink PRB resource is mainly used for predicting the traffic volume. As shown in fig. 3, the VoLTE traffic volume pre-expansion analysis method includes:
b1: extracting the indexes shown in the following table five in the current week and the last week according to the index of the network management platform:
index of five-in-one extraction
B2: calculating the number of PRBs occupied by the uplink VoLTE per ms, the number of PRBs occupied by the uplink data service per ms and the increase number of PRBs occupied by the uplink data service per ms according to the following formula:
the number of PRBs occupied by the uplink VoLTE in each ms is equal to the total number of PRBs occupied by the uplink VoLTE/the total service duration of receiving uplink data by the cell PDCP layer of QCI 1;
the number of PRBs occupied by the uplink data service per ms is equal to the average number of uplink PUSCH PRBs occupied, and the number of PRBs occupied by the uplink data service per ms is equal to the number of PRBs occupied by the uplink PUSCH PRBs per msVoLTE;
the number of PRBs occupied by the uplink data service per ms is equal to the number of PRBs occupied by the uplink data service per ms in the current week-the number of PRBs occupied by the uplink data service per ms in the previous week;
b3: calculating the number of remaining PRBs per ms of the current network uplink according to the following formula:
the number of the remaining PRBs per ms of the current network is equal to the average number of the available PRBs of the uplink PUSCH (physical uplink shared channel) (the number of the PRBs occupied by the data service per ms of the uplink VoLTE + the number of the PRBs increased by the data service per ms of the uplink).
B4: the data service behavior habits of the users cannot be changed easily in a certain period, so that the number of PRBs required by the 4G newly-added user data service can be predicted according to the data service behavior habits of the 2G and 3G users and the number of PRBs occupied by the 4G typical service.
Specifically, the number of PRBs where the 4G new user data service is located can be predicted by extracting the service types and the service durations of local 2G and 3G users in busy hours and comparing the number of PRBs occupied by the services in 4G network busy hours and the like.
B5: the final remaining uplink PRB resource after subtracting the number of PRBs required by the newly added 4G user data service from the remaining number of PRBs in the existing network can be approximately used as the resource which can be provided for the VoLTE service by the cell.
It can be understood that the remaining number of PRBs of the existing network may be determined according to the remaining number of PRBs per ms of the uplink of the existing network.
B6: the distribution ratio of good points to poor points of China mobile is 3:4:3, each voice packet of VoLTE averagely occupies 2 PRBs when in good points, and averagely occupies 3 to 4 PRBs when in middle points and poor points, so that each voice packet of VoLTE averagely occupies 3.15 PRBs.
It can be understood that the ratio of the good-medium-poor distribution is the ratio of the good-medium-poor distribution of the users in the network environment at the good point, the medium point and the poor point respectively according to the optimization experience.
B7: the VoLTE voice traffic channel number concept is built based on the 2G, 3G voice erl concept. The number of VoLTE voice channels that can be simultaneously supported by the remaining PRBs is equal to the number of remaining PRBs/3.15 per ms of uplink, and the number of VoLTE voice channels is rounded.
Where the rounding is an upward rounding (e.g., 3.2 is 4).
B8: according to the erl-B table, the call loss rate is defined to be 2%, and the VoLTE voice traffic volume which can be supported by the remaining PRBs can be obtained by querying the erl-B table in combination with the rounded VoLTE voice channel number which can be simultaneously supported by the remaining PRBs, and the unit is erl.
It is understood that the Erl _ B table can be an existing erl _ B table that can be found, and the invention is not limited thereto.
B9: predicting the newly added voice traffic of VoLTE (average number of effective RRC connections) (1-QCI (1 average number of activated ERAB)/QCI (9 average number of activated ERAB)) (X + 2G) and 3G voice migration traffic, wherein X is a conversion coefficient of a newly opened VOLTE user expected by a 4G user; the effective RRC connection average can be directly extracted through a network management platform, and is an index specified in ENB statistical terms and template specification-2.5.0; the conversion coefficient can be obtained by a market department through counting the VoLTE service opening proportion of the 4G users.
B10: the effective RRC logical connection average ═ effective RRC connection average × [ (QCI ═ 1 average activation ERAB number + QCI ═ 9 average activation ERAB number)/(QCI ═ 9 average activation ERAB number) ].
B11: by comparing the equivalent Erl concept, whether the number of the remaining channels of the LTE cell can support the predicted VoLTE new voice traffic is calculated, so that capacity expansion prediction can be performed according to the VoLTE traffic development, and a capacity expansion scheme is made in advance.
It can be understood that the equivalence Erl is the remaining number of PRBs obtained from the above calculation as the equivalent number of channels, and the supportable 4G traffic is queried through the erl _ B table by adding the 2% call loss rate.
Wherein: and 2G and 3G voice migration traffic is GSM cell traffic migration coefficient + TD-SCDMA cell traffic migration coefficient.
It can be understood that the GSM traffic migration coefficient and TD-SCDMA traffic migration coefficient can be calculated according to the data of the GSM cell traffic and TD-SCDMA cell traffic in table five in the present week and the previous week.
Fig. 4 is a schematic structural diagram of an LTE capacity analysis apparatus according to an embodiment of the present invention. As shown in fig. 4, the apparatus includes a logic connection determining unit 10, a direct capacity expansion analyzing unit 20, a direct capacity expansion judging unit 30, and a pre-capacity expansion analyzing unit 40, where:
the logical connection determining unit 10 is configured to determine an average number of effective RRC logical connections in the current network;
the direct capacity expansion analysis unit 20 is configured to perform direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and the current network capacity expansion standard;
the direct capacity expansion judging unit 30 is configured to judge whether the target cell needs to be directly expanded according to the result of the direct capacity expansion analysis and a preset standard;
the pre-expansion analysis unit 40 is configured to perform VoLTE traffic pre-expansion analysis on the target cell that does not need direct expansion when it is determined that the target cell does not need direct expansion.
Specifically, the workflow of the apparatus of the present embodiment includes: the logical connection determining unit 10 determines the average number of the effective RRC logical connections of the current network; the direct capacity expansion analysis unit 20 performs direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and the current network capacity expansion standard; the direct capacity expansion judging unit 30 judges whether the target cell needs direct capacity expansion according to the result of the direct capacity expansion analysis and a preset standard; when judging that the target cell does not need to be directly expanded, the pre-expansion analysis unit 40 performs VoLTE traffic pre-expansion analysis on the target cell which does not need to be directly expanded.
The apparatus described in this embodiment may be used to implement the above method embodiments, and the principle and technical effect are similar, which are not described herein again.
Further, as an optimization of the above apparatus embodiment, the pre-expansion analysis unit 40 may be specifically configured to determine whether the target cell meets a pre-expansion condition of the VoLTE traffic according to a result of the pre-expansion analysis, and perform pre-expansion warning on the target cell when the target cell meets the pre-expansion condition of the VoLTE traffic.
Further, as a preferred embodiment of the foregoing apparatus, the pre-expansion analysis unit 40 may be further configured to perform VoLTE traffic pre-expansion analysis on a target cell that does not need to be directly expanded based on 2G or 3G voice ireland erl concepts.
Further, as a preference of the above apparatus embodiment, the pre-expansion analysis unit 40 may be further configured to:
determining the number of VoLTE voice channels that the remaining PRBs can simultaneously support based on the 2G and 3G voice erl concepts;
according to the rounded VoLTE voice channel number which can be simultaneously supported by the remaining PRB, inquiring erl-B table to determine the VoLTE voice traffic volume which can be supported by the remaining PRB;
determining and predicting newly added voice traffic of VoLTE according to the average number of effective RRC connections, the average number of activated ERAB (best quality indicator) of QCI (equal to 1), the average number of activated ERAB (best quality indicator) of QCI (equal to 9), the conversion coefficient of a newly opened VOLTE (voice over long term evolution) user predicted by a 4G user and the traffic of 2G and 3G voice migration; wherein:
the 2G and 3G voice migration traffic is GSM cell traffic migration coefficient + TD-SCDMA cell traffic TD-SCDMA traffic migration coefficient; (3)
and determining whether the target cell should be subjected to capacity expansion early warning or not according to the comparison result of the VoLTE voice traffic which can be supported by the residual PRB and the predicted VoLTE newly-increased voice traffic.
The apparatus described in this embodiment may be used to implement the above method embodiments, and the principle and technical effect are similar, which are not described herein again.
It should be noted that, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to part of the description of the method embodiment.
According to the LTE capacity analysis method and device, the average number of the effective RRC connections of the current network is corrected by combining the uplink and downlink average activation ERAB numbers of QCI (quaternary ammonium chloride) 1 and QCI (quaternary ammonium chloride) 9 to obtain the average effective RRC logical connection, so that the number of active users in the environment of coexistence of the words and the numbers is more effectively analyzed; the number of PRBs occupied by the VoLTE service is equivalent to the number of voice channels, the VoLTE voice telephone traffic with erl as a unit is established by combining the call loss rate and an erl-B table, and the VoLTE telephone traffic gauge model prediction is carried out by combining 2G telephone traffic and 3G telephone traffic, so that the analysis of the number of active users in the environment with concurrent speech and the impact of the VoLTE telephone traffic on LTE resources can be more effectively carried out, and the impact of the VoLTE telephone traffic on the LTE resources can be more accurately predicted.
The above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. An LTE capacity analysis method, comprising:
determining the average number of effective Radio Resource Control (RRC) logical connections of the current network;
performing direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and the current network capacity expansion standard;
judging whether the target cell needs direct capacity expansion according to the result of the direct capacity expansion analysis and a preset standard;
if judging and knowing that the target cell does not need direct capacity expansion, carrying out voice service VoLTE (voice over long term evolution) traffic volume pre-capacity expansion analysis on the target cell which does not need direct capacity expansion;
the method further includes determining the present network effective RRC logical connection average according to the following equation:
the average number of effective RRC logical connections (average number of effective RRC connections) (qos metric value QCI ═ 1 average number of active evolved radio access bearers ERAB + QCI ═ 9 average number of active evolved radio access bearers ERAB)/QCI ═ 9 average number of active ERAB);
the voice traffic volume pre-expansion analysis of the voice service VoLTE based on the IMS to the target cell without direct expansion comprises the following steps:
based on 2G and 3G voice Ireland erl concepts, VoLTE traffic volume pre-expansion analysis is carried out on a target cell which does not need direct expansion.
2. The method of claim 1, wherein the preset criteria comprise:
the number of effective RRC users reaches the user number threshold, the downlink utilization rate reaches the utilization rate threshold, and the downlink flow reaches the flow threshold; or the like, or, alternatively,
the number of effective RRC users reaches the user number threshold, the uplink utilization rate reaches the utilization rate threshold, and the uplink flow reaches the flow threshold.
3. The method of claim 1, wherein the performing VoLTE traffic pre-expansion analysis on the target cell without direct expansion comprises:
determining whether the target cell meets VoLTE traffic volume pre-expansion conditions or not according to the pre-expansion analysis result;
and if the target cell meets the VoLTE traffic volume pre-expansion condition, performing pre-expansion early warning on the target cell.
4. The method of claim 1, wherein the VoLTE traffic pre-expansion analysis is performed on the target cell without direct expansion based on 2G and 3G voice irish erl concepts, further comprising:
determining the number of VoLTE voice channels which can be simultaneously supported by the remaining physical resource blocks PRB based on 2G and 3G voice erl concepts;
according to the rounded VoLTE voice channel number which can be simultaneously supported by the remaining PRB, inquiring erl-B table to determine the VoLTE voice traffic volume which can be supported by the remaining PRB;
determining and predicting newly added voice traffic of VoLTE according to the average number of effective RRC connections, the average number of activated ERAB (best quality indicator) of QCI (equal to 1), the average number of activated ERAB (best quality indicator) of QCI (equal to 9), the conversion coefficient of a newly opened VoLTE user expected by a 4G user and the traffic of 2G and 3G voice migration; wherein:
the 2G and 3G voice migration telephone traffic is GSM cell telephone traffic migration coefficient + TD-SCDMA cell telephone traffic migration coefficient; and determining whether the target cell should be subjected to capacity expansion early warning or not according to the comparison result of the VoLTE voice traffic which can be supported by the residual PRB and the predicted VoLTE newly-increased voice traffic.
5. An LTE capacity analysis apparatus, comprising:
a logical connection determining unit, configured to determine an effective RRC logical connection average of a current network;
a direct capacity expansion analysis unit, configured to perform direct capacity expansion analysis on the target cell according to the effective RRC logical connection average and a current network capacity expansion standard;
a direct capacity expansion judging unit, configured to judge whether the target cell needs to be directly expanded according to a result of the direct capacity expansion analysis and a preset standard;
the pre-expansion analysis unit is used for carrying out VoLTE traffic pre-expansion analysis on the target cell which does not need direct expansion when judging that the target cell does not need direct expansion;
the logical connection determining unit is specifically configured to determine the current network effective RRC logical connection average according to the following formula:
the average number of effective RRC logical connections (average number of effective RRC connections) (qos metric value QCI ═ 1 average number of active evolved radio access bearers ERAB + QCI ═ 9 average number of active evolved radio access bearers ERAB)/QCI ═ 9 average number of active ERAB);
the pre-expansion analysis unit is also used for carrying out voice service VoLTE traffic pre-expansion analysis based on IMS on a target cell which does not need direct expansion based on 2G and 3G voice Ireland erl concepts.
6. The apparatus of claim 5, wherein the pre-expansion analysis unit is specifically configured to determine whether the target cell meets a VoLTE traffic pre-expansion condition according to a result of the pre-expansion analysis, and perform pre-expansion warning on the target cell when the target cell meets the VoLTE traffic pre-expansion condition.
7. The apparatus of claim 5, wherein the pre-expansion analysis unit is further configured to:
determining the number of VoLTE voice channels that the remaining PRBs can simultaneously support based on the 2G and 3G voice erl concepts;
according to the rounded VoLTE voice channel number which can be simultaneously supported by the remaining PRB, inquiring erl-B table to determine the VoLTE voice traffic volume which can be supported by the remaining PRB;
determining and predicting newly added voice traffic of VoLTE according to the average number of effective RRC connections, the average number of activated ERAB (best quality indicator) of QCI (equal to 1), the average number of activated ERAB (best quality indicator) of QCI (equal to 9), the conversion coefficient of a newly opened VoLTE user expected by a 4G user and the traffic of 2G and 3G voice migration; wherein:
the 2G and 3G voice migration traffic is GSM cell traffic migration coefficient + TD-SCDMA cell traffic TD-SCDMA traffic migration coefficient;
and determining whether the target cell should be subjected to capacity expansion early warning or not according to the comparison result of the VoLTE voice traffic which can be supported by the residual PRB and the predicted VoLTE newly-increased voice traffic.
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