CN112188543B - SRVCC switching method and device - Google Patents
SRVCC switching method and device Download PDFInfo
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- CN112188543B CN112188543B CN201910586184.7A CN201910586184A CN112188543B CN 112188543 B CN112188543 B CN 112188543B CN 201910586184 A CN201910586184 A CN 201910586184A CN 112188543 B CN112188543 B CN 112188543B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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Abstract
The invention discloses a method and a device for SRVCC switching. The method comprises the following steps: acquiring an uplink measurement report and a downlink measurement report; determining the maximum loss allowed by the uplink according to the uplink measurement report, and determining the maximum loss allowed by the downlink according to the downlink measurement report; calculating the difference value of the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether the switching condition is met according to the difference value; and if so, triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network. According to the scheme, the SRVCC switching is carried out according to whether the uplink loss and the downlink loss are balanced or not, the conversation experience of a user can be effectively improved, the implementation mode is simple and easy, the switching efficiency is high, and the SRVCC switching method and the SRVCC switching device are suitable for large-scale implementation and application.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for SRVCC handover.
Background
Srvcc (single Radio Voice continuity) is a Voice over LTE Voice service continuity scheme, and is specifically intended to ensure Voice Call continuity when a single Radio user terminal moves between an LTE/Pre-LTE network and a 2G/3G CS network.
The current SRVCC handover scheme generally includes two types: firstly, based on the covered SRVCC switching mode, that is, when the user terminal uses the LTE network to carry out the language conversation process, and the LTE signal intensity and the like are lower than the preset threshold, the SRVCC switching is triggered; and secondly, the quality-based SRVCC switching mode carries out SRVCC switching through wireless signal environment indexes, end-to-end environment indexes and the like.
However, in the implementation process, the inventor finds that the following defects exist in the prior art: the SRVCC handover mode based on coverage and the SRVCC handover mode based on quality both fail to ensure the user's conversation experience during the conversation process, and the SRVCC handover mode based on quality also has the disadvantages of cumbersome operation and low handover efficiency.
Disclosure of Invention
In view of the above problems, the present invention is proposed to provide an SRVCC handover method and apparatus that overcomes or at least partially solves the above problems.
According to an aspect of the present invention, there is provided an SRVCC handover method, including:
acquiring an uplink measurement report and a downlink measurement report;
determining the maximum loss allowed by the uplink according to the uplink measurement report, and determining the maximum loss allowed by the downlink according to the downlink measurement report;
calculating the difference value of the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether a switching condition is met according to the difference value;
and if so, triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network.
Optionally, the determining the maximum uplink allowed loss according to the uplink measurement report further includes:
and determining the maximum loss allowed by the uplink according to the transmitting power of the user terminal, the terminal gain, the artificial loss, the antenna gain of the base station, the feeder loss of the base station, the diversity gain and/or the sensitivity of the base station.
Optionally, the determining the maximum uplink allowed loss according to the uplink measurement report further includes determining the maximum uplink allowed loss based on the following formula:
the maximum loss allowed in uplink is the transmission power of the user terminal, the terminal gain, the artificial loss, the antenna gain of the base station, the feeder loss of the base station, the diversity gain and the sensitivity of the base station.
Optionally, the determining the maximum loss allowed in the downlink according to the downlink measurement report further includes:
and determining the maximum loss allowed by downlink according to the transmitting power of the base station, the loss of the combiner, the loss of the feeder line of the base station, the gain of the antenna of the base station, the artificial loss, the gain of the terminal and/or the sensitivity of the terminal.
Optionally, the determining the maximum downlink allowed loss according to the downlink measurement report further includes determining the maximum downlink allowed loss based on the following formula:
maximum loss allowed in downlink is base station transmitting power-combiner loss-base station feeder loss + base station antenna gain-artificial loss + terminal gain-terminal sensitivity
Optionally, the determining whether the handover condition is satisfied according to the difference further includes:
determining the number of sampling points of which the difference value between the maximum loss allowed by the uplink and the maximum loss allowed by the downlink is larger than a first preset threshold;
and when the ratio of the number of the sampling points to the total number of the sampling points is greater than a second preset threshold value, determining that the switching condition is met.
Optionally, the triggering the handover of the user terminal from the LTE network to the 2G and/or 3G network further includes:
determining candidate service cells of a 2G and/or 3G network corresponding to the user terminal;
determining a target serving cell from the candidate serving cells according to the coverage level and/or the communication quality of the candidate serving cells;
triggering handover of the user terminal from the LTE network to the target serving cell.
According to another aspect of the present invention, there is provided an SRVCC handover apparatus, including:
the acquisition module is suitable for acquiring an uplink measurement report and a downlink measurement report;
a loss calculation module adapted to determine an uplink allowed maximum loss according to the uplink measurement report and determine a downlink allowed maximum loss according to the downlink measurement report;
the condition judgment module is suitable for calculating the difference value of the uplink allowed maximum loss and the downlink allowed maximum loss and determining whether the switching condition is met or not according to the difference value;
and the switching module is suitable for triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network if the difference value determines whether the switching condition is met.
Optionally, the loss calculation module is further adapted to: and determining the maximum loss allowed by the uplink according to the transmitting power of the user terminal, the terminal gain, the artificial loss, the antenna gain of the base station, the feeder loss of the base station, the diversity gain and/or the sensitivity of the base station.
Optionally, the loss calculation module is further adapted to: the maximum allowed uplink loss is the user terminal transmitting power + terminal gain-artificial loss + base station antenna gain-base station feeder loss + diversity gain-base station sensitivity.
Optionally, the loss calculation module is further adapted to: and determining the maximum loss allowed by downlink according to the transmitting power of the base station, the loss of the combiner, the loss of the feeder line of the base station, the gain of the antenna of the base station, the artificial loss, the gain of the terminal and/or the sensitivity of the terminal.
Optionally, the loss calculation module is further adapted to: maximum loss allowed in downlink is base station transmitting power-combiner loss-base station feeder loss + base station antenna gain-artificial loss + terminal gain-terminal sensitivity
Optionally, the condition determining module is further adapted to: determining the number of sampling points of which the difference value between the maximum loss allowed by the uplink and the maximum loss allowed by the downlink is larger than a first preset threshold;
and when the ratio of the number of the sampling points to the total number of the sampling points is greater than a second preset threshold value, determining that the switching condition is met.
Optionally, the switching module is further adapted to: determining candidate service cells of a 2G and/or 3G network corresponding to the user terminal;
determining a target serving cell from the candidate serving cells according to the coverage level and/or the communication quality of the candidate serving cells;
triggering handover of the user terminal from the LTE network to the target serving cell.
According to yet another aspect of the present invention, there is provided a computing device comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface are communicated with each other through the communication bus;
the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the SRVCC switching method.
According to yet another aspect of the present invention, there is provided a computer storage medium having at least one executable instruction stored therein, the executable instruction causing a processor to execute the SRVCC handover method as described above.
According to the SRVCC switching method and device provided by the invention, firstly, an uplink measurement report and a downlink measurement report are obtained; determining the maximum loss allowed by the uplink according to the uplink measurement report, and determining the maximum loss allowed by the downlink according to the downlink measurement report; further calculating the difference value of the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether the switching condition is met according to the difference value; and if so, triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network. According to the scheme, the SRVCC switching is carried out according to whether the uplink loss and the downlink loss are balanced or not, the conversation experience of a user can be effectively improved, the implementation mode is simple and easy, the switching efficiency is high, and the method and the device are suitable for large-scale implementation and application.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart illustrating an SRVCC handover method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an SRVCC handover method according to another embodiment of the present invention;
fig. 3 is a functional block diagram of an SRVCC handover apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a computing device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 illustrates a flowchart of an SRVCC handover method according to an embodiment of the present invention.
In an actual implementation process, the SRVCC handover method based on coverage and/or quality provided in the prior art is adopted, so that the user experience of conversation is poor. For example, in the SRVCC handover manner with coverage and/or quality, the SRVCC handover is not usually triggered when the uplink coverage is poor and the downlink coverage is normal, thereby greatly affecting the user's conversation experience. In order to solve the technical problem, the present embodiment provides a method for performing SRVCC handover according to uplink and downlink loss balance, so as to effectively improve the user call experience. The SRVCC handover method provided in this embodiment may be executed by a preset device, and the device may be located at the base station side.
As shown in fig. 1, the method includes:
step S110, an uplink measurement report and a downlink measurement report are obtained.
The uplink measurement report is related measurement information in an uplink between a user terminal and a base station terminal, wherein the measurement information is measured by the user terminal; the downlink measurement report is specifically related measurement information in a downlink from the base station to the ue, which is measured by the base station. In a specific implementation process, the base station may obtain a downlink measurement report obtained by its own measurement and obtain an uplink measurement report reported by the user terminal. In this embodiment, the specific acquisition modes of the uplink measurement report and the downlink measurement report are not limited, and those skilled in the art can select the corresponding acquisition mode according to actual requirements.
Step S120, determining the maximum loss allowed by the uplink according to the uplink measurement report, and determining the maximum loss allowed by the downlink according to the downlink measurement report.
The uplink allowed maximum loss and/or the downlink allowed maximum loss described in this embodiment may specifically be an uplink allowed maximum Power loss and/or a downlink allowed maximum Power loss, and the Power may specifically refer to RSRP (Reference Signal Receiving Power).
The uplink allowed maximum loss can be determined by the uplink measurement report obtained in step S110, and similarly, the downlink allowed maximum loss can also be determined by the downlink measurement report obtained in step S110. In this embodiment, the specific calculation manner of the maximum uplink allowed loss and/or the maximum downlink allowed loss and the like are not limited, for example, the maximum uplink allowed loss and the maximum downlink allowed loss may be determined comprehensively based on the positive gain and the negative loss in the uplink and/or the downlink, and the like.
Step S130, calculating a difference value between the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether a switching condition is met according to the difference value; if yes, go to step S140.
In this embodiment, it is specifically determined whether the current uplink power is balanced with the downlink power according to a difference between the uplink allowed maximum loss and the downlink allowed maximum loss. Wherein, the larger the difference between the maximum uplink allowed loss and the maximum downlink allowed loss is, the more unbalanced the uplink power and the downlink power is, it is determined that the handover condition is currently satisfied, and then step S140 is executed.
Step S140, triggering the handover of the ue from the LTE network to the 2G and/or 3G network.
And when the difference value between the uplink allowed maximum loss and the downlink allowed maximum loss is determined to meet the switching condition, the base station terminal issues a switching instruction to the user terminal, so that the switching of the user terminal from the LTE network to the 2G and/or 3G network is triggered. The 2G and/or 3G network may specifically include a GERAN network and/or a UTRAN network.
Therefore, in the embodiment, unlike the SRVCC handover based on coverage and quality in the prior art, an uplink measurement report and a downlink measurement report are obtained, and the uplink allowed maximum loss is further determined according to the uplink measurement report and the downlink allowed maximum loss is determined according to the downlink measurement report; calculating the difference value of the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether the switching condition is met or not according to the difference value; and if so, triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network. Finally, SRVCC switching is carried out according to whether uplink loss and downlink loss are balanced or not, so that the conversation experience of a user can be effectively improved, and the method is simple and easy to implement, high in switching efficiency and suitable for large-scale implementation and application.
Fig. 2 is a flowchart illustrating an SRVCC handover method according to another embodiment of the present invention. The SRVCC handover method provided in this embodiment is directed to further optimization of the SRVCC handover method shown in fig. 1.
As shown in fig. 2, the method includes:
step S210, an uplink measurement report and a downlink measurement report are obtained.
Specifically, the uplink measurement report usually includes at least one of the following information: user terminal transmit power, terminal gain, artificial loss, base station antenna gain, base station feeder loss, diversity gain, and base station sensitivity; the downlink measurement report typically includes at least one of the following information: base station transmit power, combiner loss, base station feeder loss, base station antenna gain, artificial loss, terminal gain, and terminal sensitivity.
Step S220, according to the user terminal transmitting power, terminal gain, artificial loss, base station antenna gain, base station feeder loss, diversity gain and/or base station sensitivity in the uplink measurement report, determining the uplink allowable maximum loss.
In order to accurately determine the maximum uplink allowed loss, the present embodiment specifically determines the maximum uplink allowed loss based on a plurality of data. Specifically, the maximum uplink allowed loss may be determined comprehensively according to the user terminal transmission power, the terminal gain, the artificial loss, the base station antenna gain, the base station feeder loss, the diversity gain, the base station sensitivity, and the like. The higher the user terminal transmitting power is, the higher various gains are (including terminal gain, base station antenna gain and/or diversity gain), the smaller various losses are (including artificial loss and/or base station feeder loss) and the lower the base station sensitivity is, the higher the determined uplink allowed maximum loss is.
The embodiment does not limit the specific implementation of determining the maximum uplink allowed loss based on the multiple data, and the maximum uplink allowed loss may be determined by the following formula 2-1, for example:
the maximum loss allowed in uplink is the user terminal transmitting power + terminal gain-artificial loss + base station antenna gain-base station feeder loss + diversity gain-base station sensitivity (formula 2-1)
Optionally, to further improve the accuracy of the obtained maximum uplink allowed loss, corresponding weights may be configured for data information, such as user terminal transmission power, terminal gain, artificial loss, base station antenna gain, base station feeder loss, diversity gain, and base station sensitivity, corresponding to the uplink measurement report, and the maximum uplink allowed loss is determined comprehensively according to the weights of the data information and the above formula 2-1.
And step S230, determining the maximum loss allowed by the downlink according to the base station transmitting power, the combiner loss, the base station feeder loss, the base station antenna gain, the artificial loss, the terminal gain and/or the terminal sensitivity in the downlink measurement report.
Similarly, in order to accurately determine the maximum loss allowed in the downlink, the present embodiment specifically determines the maximum loss allowed in the downlink based on multiple data. Specifically, the maximum loss allowed for downlink may be determined according to the base station transmission power, the combiner loss, the base station feeder loss, the base station antenna gain, the artificial loss, the terminal gain, and the terminal sensitivity. In the case where a combiner is included, the combiner loss may be determined according to the actual combiner loss, and in the case where no combiner is included, the combiner loss defaults to zero. The higher the transmission power of the base station is, the higher the various gains are (including terminal gain and base station antenna gain), the smaller the various losses are (including combiner loss, artificial loss and base station feeder loss) and the lower the terminal sensitivity is, the higher the determined downlink allowed maximum loss is.
The embodiment does not limit the specific implementation of determining the maximum downlink allowed loss based on the multiple data, and for example, the maximum downlink allowed loss may be determined by the following formula 2-2:
downlink allowed maximum loss-base station transmitting power-combiner loss-base station feeder loss + base station antenna gain-artificial loss + terminal gain-terminal sensitivity (formula 2-2)
Optionally, to further improve the accuracy of the obtained maximum downlink allowed loss, corresponding weights may be configured for data information, such as base station transmission power, combiner loss, base station feeder loss, base station antenna gain, artificial loss, terminal gain, and/or terminal sensitivity, corresponding to the downlink measurement report, and the maximum downlink allowed loss is determined comprehensively according to the weights of the data information and the above equation 2-2.
In this embodiment, the execution sequence of the steps S220 and S230 is not limited, and the steps S220 and S230 may be executed sequentially according to the corresponding sequence, or concurrently.
Step S240, determining the number of sampling points whose difference between the maximum allowed uplink loss and the maximum allowed downlink loss is greater than a first preset threshold.
In a specific implementation process, for each of at least one sampling point, the maximum uplink allowed loss and the maximum downlink allowed loss corresponding to the sampling point are determined through steps S220 and S230, and then a difference between the maximum uplink allowed loss and the maximum downlink allowed loss corresponding to the sampling point is determined. The difference between the uplink allowed maximum loss and the downlink allowed maximum loss is specifically an absolute difference between the uplink allowed maximum loss and the downlink allowed maximum loss.
Further, for each sampling point, whether the difference between the maximum allowed uplink loss and the maximum allowed downlink loss corresponding to the sampling point is greater than a first preset threshold is determined. Therefore, the number of sampling points with the difference value between the maximum loss allowed by the uplink and the maximum loss allowed by the downlink larger than the first preset threshold value can be counted.
Step S250, determining whether the ratio of the number of the sampling points to the total number of the sampling points is greater than a second preset threshold, if yes, performing step S260.
After determining the number of the sampling points of which the difference between the maximum allowed uplink loss and the maximum allowed downlink loss is greater than the first preset threshold in step S240, further determining the ratio of the number of the sampling points to the total number of the sampling points; further judging whether the ratio of the number of the sampling points to the total number of the sampling points is greater than a second preset threshold value, if so, indicating that the uplink power and the downlink power are not matched, and executing the step S260; if not, the SRVCC switching is not triggered.
In combination with step S240 and step S250, the SRVCC handover condition in this embodiment is as shown in equation 2-3:
the RSRP1 is an uplink allowed maximum loss, the RSRP2 is a downlink allowed maximum loss, x is a first preset threshold, count (| RSRP1-RSRP2| ≧ x) is the number of sampling points where a difference between the uplink allowed maximum loss and the downlink allowed maximum loss is greater than the first preset threshold, sum is the number of total sampling points, and y is a second preset threshold.
Optionally, the first preset threshold and/or the second preset threshold may be determined according to an optimal state of the maximum uplink allowed loss and/or an optimal state of the maximum downlink allowed loss. Specifically, when the optimal state of the maximum uplink allowed loss is determined, the optimal state of the maximum uplink allowed loss can be determined according to power values corresponding to the situation that the transmission power of the user terminal is at the highest, various gains are at the highest (including terminal gain, base station antenna gain and/or diversity gain), various losses are at the lowest (including artificial loss and/or base station feeder loss) and the sensitivity of the base station is at the lowest; similarly, when determining the optimal state of the maximum loss allowed in the downlink, the optimal state of the maximum loss allowed in the downlink may be determined according to the power values corresponding to the transmission power of the base station being at the highest, various gains being at the highest (including the terminal gain and the base station antenna gain), various losses being at the minimum (including the combiner loss, the artificial loss, and the base station feeder loss), and the terminal sensitivity being at the lowest. And then determining a first preset threshold and a second preset threshold according to the difference value between the optimal state of the maximum loss allowed by the uplink and the optimal state of the maximum loss allowed by the downlink.
Step S260, triggering the handover of the ue from the LTE network to the 2G and/or 3G network.
When the ratio of the number of the sampling points determined in step S250 to the total number of the sampling points is greater than a second preset threshold, it indicates that the switching condition is currently satisfied, so as to trigger the switching of the user terminal from the LTE network to the 2G and/or 3G network.
In a specific implementation process, in a process of triggering handover of a user terminal from an LTE network to a 2G and/or 3G network, a candidate serving cell of the 2G and/or 3G network corresponding to the user terminal may be determined first, where the candidate serving cell may be a serving cell of the 2G and/or 3G network covering the user terminal; further, according to the coverage level and/or the communication Quality of the candidate serving cells, a target serving cell is determined from the candidate serving cells, for example, the target serving cell may be determined comprehensively according to the RSRP and the CQI (channel Quality indicator) of each candidate serving cell; eventually triggering handover of the user terminal from the LTE network to the target serving cell.
Therefore, in the embodiment, unlike the SRVCC handover based on coverage and quality in the prior art, the SRVCC handover is performed according to whether uplink loss and downlink loss are balanced, so that the call experience of a user can be effectively improved, and the implementation method is simple and easy to implement, high in handover efficiency, and suitable for large-scale implementation and application; in addition, in the embodiment, the uplink allowed maximum loss and the downlink allowed maximum loss are respectively calculated according to various data parameters in the last measurement report and the downlink measurement report, which is beneficial to improving the accuracy of the determined uplink allowed maximum loss and downlink allowed maximum loss, so that the SRVCC handover can further meet the user requirements; in addition, in the embodiment, the SRVCC is started only when the ratio of the number of sampling points, in which the difference between the uplink allowed maximum loss and the downlink allowed maximum loss is greater than the first preset threshold value, to the total number of sampling points is greater than the second preset threshold value, so that the SRVCC handover accuracy is further improved, and the user experience is improved; in addition, in this embodiment, when it is determined that handover of the user terminal from the LTE network to the 2G and/or 3G network is to be triggered, the multiple candidate serving cells are obtained, so that a target serving cell to be handed over is determined comprehensively according to RSRP, CQI, and the like, quality of the user in a call process is further ensured, and user experience is further improved.
Fig. 3 is a functional structure diagram of an SRVCC handover apparatus according to an embodiment of the present invention. As shown in fig. 3, the apparatus includes: an acquisition module 31, a loss calculation module 32, a condition judgment module 33, and a switching module 34.
An obtaining module 31, adapted to obtain an uplink measurement report and a downlink measurement report;
a loss calculation module 32 adapted to determine an uplink allowed maximum loss from the uplink measurement report and a downlink allowed maximum loss from the downlink measurement report;
a condition judgment module 33, adapted to calculate a difference between the uplink allowed maximum loss and the downlink allowed maximum loss, and determine whether a handover condition is satisfied according to the difference;
a handover module 34 adapted to trigger a handover of the user terminal from the LTE network to the 2G and/or 3G network if the difference determines whether a handover condition is met.
Optionally, the loss calculation module 32 is further adapted to: and determining the maximum loss allowed by the uplink according to the transmitting power of the user terminal, the terminal gain, the artificial loss, the antenna gain of the base station, the feeder loss of the base station, the diversity gain and/or the sensitivity of the base station.
Optionally, the loss calculation module 32 is further adapted to: the maximum allowed uplink loss is the user terminal transmitting power + terminal gain-artificial loss + base station antenna gain-base station feeder loss + diversity gain-base station sensitivity.
Optionally, the loss calculation module 32 is further adapted to: and determining the maximum loss allowed by downlink according to the transmitting power of the base station, the loss of the combiner, the loss of the feeder line of the base station, the gain of the antenna of the base station, the artificial loss, the gain of the terminal and/or the sensitivity of the terminal.
Optionally, the loss calculation module 32 is further adapted to: maximum loss allowed in downlink is base station transmitting power-combiner loss-base station feeder loss + base station antenna gain-artificial loss + terminal gain-terminal sensitivity
Optionally, the condition determining module 33 is further adapted to: determining the number of sampling points of which the difference value between the maximum loss allowed by the uplink and the maximum loss allowed by the downlink is larger than a first preset threshold;
and when the ratio of the number of the sampling points to the total number of the sampling points is greater than a second preset threshold value, determining that the switching condition is met.
Optionally, the switching module 34 is further adapted to: determining candidate service cells of a 2G and/or 3G network corresponding to the user terminal;
determining a target serving cell from the candidate serving cells according to the coverage level and/or the communication quality of the candidate serving cells;
triggering handover of the user terminal from the LTE network to the target serving cell.
The device can operate independently and can be integrated with a base station end. The specific implementation process of each module in the apparatus may refer to the description of the corresponding part in the method embodiment shown in fig. 1 and/or fig. 2, which is not described herein again.
Therefore, in the embodiment, unlike the SRVCC handover based on coverage and quality in the prior art, an uplink measurement report and a downlink measurement report are obtained, and the uplink allowed maximum loss is further determined according to the uplink measurement report and the downlink allowed maximum loss is determined according to the downlink measurement report; calculating the difference value of the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether the switching condition is met according to the difference value; and if so, triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network. Finally, SRVCC switching is carried out according to whether uplink loss and downlink loss are balanced or not, so that the conversation experience of a user can be effectively improved, and the method is simple and easy to implement, high in switching efficiency and suitable for large-scale implementation and application.
According to an embodiment of the present invention, a non-volatile computer storage medium is provided, where the computer storage medium stores at least one executable instruction, and the computer executable instruction may execute the SRVCC handover method in any of the above method embodiments.
Fig. 4 is a schematic structural diagram of a computing device according to an embodiment of the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the computing device.
As shown in fig. 4, the computing device may include: a processor (processor)402, a Communications Interface 404, a memory 406, and a Communications bus 408.
Wherein:
the processor 402, communication interface 404, and memory 406 communicate with each other via a communication bus 408.
A communication interface 404 for communicating with network elements of other devices, such as clients or other servers.
The processor 402 is configured to execute the procedure 410, and may specifically execute the relevant steps in the above SRVCC handover method embodiment.
In particular, program 410 may include program code comprising computer operating instructions.
The processor 402 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement an embodiment of the invention. The computing device includes one or more processors, which may be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.
And a memory 406 for storing a program 410. Memory 406 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The program 410 may specifically be configured to cause the processor 402 to perform the following operations:
acquiring an uplink measurement report and a downlink measurement report;
determining the maximum loss allowed by the uplink according to the uplink measurement report, and determining the maximum loss allowed by the downlink according to the downlink measurement report;
calculating the difference value of the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether a switching condition is met according to the difference value;
and if so, triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network.
In an alternative embodiment, the program 410 may be specifically configured to cause the processor 402 to perform the following operations:
and determining the maximum loss allowed by the uplink according to the transmitting power of the user terminal, the terminal gain, the artificial loss, the antenna gain of the base station, the feeder loss of the base station, the diversity gain and/or the sensitivity of the base station.
In an alternative embodiment, the program 410 may be specifically configured to cause the processor 402 to perform the following operations:
determining an uplink allowed maximum loss based on the following formula:
the maximum allowed uplink loss is the user terminal transmitting power + terminal gain-artificial loss + base station antenna gain-base station feeder loss + diversity gain-base station sensitivity.
In an alternative embodiment, the program 410 may be specifically configured to cause the processor 402 to perform the following operations:
and determining the maximum loss allowed by downlink according to the transmitting power of the base station, the loss of the combiner, the loss of the feeder line of the base station, the gain of the antenna of the base station, the artificial loss, the gain of the terminal and/or the sensitivity of the terminal.
In an alternative embodiment, the program 410 may be specifically configured to cause the processor 402 to perform the following operations:
determining a downlink allowed maximum loss based on the following formula:
maximum loss allowed in downlink is base station transmitting power-combiner loss-base station feeder loss + base station antenna gain-artificial loss + terminal gain-terminal sensitivity
In an alternative embodiment, the program 410 may be specifically configured to cause the processor 402 to perform the following operations:
determining the number of sampling points of which the difference value between the maximum loss allowed by the uplink and the maximum loss allowed by the downlink is larger than a first preset threshold;
and when the ratio of the number of the sampling points to the total number of the sampling points is greater than a second preset threshold value, determining that the switching condition is met.
In an alternative embodiment, the program 410 may be specifically configured to cause the processor 402 to perform the following operations:
determining candidate service cells of a 2G and/or 3G network corresponding to the user terminal;
determining a target serving cell from the candidate serving cells according to the coverage level and/or the communication quality of the candidate serving cells;
triggering handover of the user terminal from the LTE network to the target serving cell.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in an SRVCC switching apparatus according to an embodiment of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (8)
1. An SRVCC handover method, comprising:
acquiring an uplink measurement report and a downlink measurement report;
determining the maximum loss allowed by the uplink according to the uplink measurement report, and determining the maximum loss allowed by the downlink according to the downlink measurement report; determining the maximum loss allowed by uplink according to the transmitting power of a user terminal, the terminal gain, the artificial loss, the base station antenna gain, the base station feeder loss, the diversity gain and the base station sensitivity; determining downlink allowable maximum loss according to the base station transmitting power, combiner loss, base station feeder loss, base station antenna gain, artificial loss, terminal gain and terminal sensitivity;
calculating the difference value of the maximum loss allowed by the uplink and the maximum loss allowed by the downlink, and determining whether a switching condition is met according to the difference value;
and if so, triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network.
2. The method of claim 1, wherein the determining an uplink allowed maximum loss from the uplink measurement report further comprises determining an uplink allowed maximum loss based on the following equation:
the maximum loss allowed in uplink = user terminal transmission power + terminal gain-artificial loss + base station antenna gain-base station feeder loss + diversity gain-base station sensitivity.
3. The method of claim 1, wherein the determining the maximum loss allowed for the downlink according to the downlink measurement report further comprises determining the maximum loss allowed for the downlink based on the following formula:
the downlink allowed maximum loss = base station transmit power-combiner loss-base station feeder loss + base station antenna gain-artificial loss + terminal gain-terminal sensitivity.
4. The method of any of claims 1-3, wherein said determining whether a handover condition is satisfied based on said difference further comprises:
determining the number of sampling points of which the difference value between the maximum loss allowed by the uplink and the maximum loss allowed by the downlink is larger than a first preset threshold;
and when the ratio of the number of the sampling points to the total number of the sampling points is greater than a second preset threshold value, determining that the switching condition is met.
5. The method according to any of claims 1-3, wherein the triggering handover of the user terminal from the LTE network to the 2G and/or 3G network further comprises:
determining candidate service cells of a 2G and/or 3G network corresponding to the user terminal;
determining a target serving cell from the candidate serving cells according to the coverage level and/or the communication quality of the candidate serving cells;
a handover of the user terminal from the LTE network to the target serving cell will be triggered.
6. An SRVCC handover apparatus, comprising:
the acquisition module is suitable for acquiring an uplink measurement report and a downlink measurement report;
a loss calculation module adapted to determine an uplink allowed maximum loss according to the uplink measurement report and determine a downlink allowed maximum loss according to the downlink measurement report; determining the maximum loss allowed by uplink according to the transmitting power of a user terminal, the terminal gain, the artificial loss, the base station antenna gain, the base station feeder loss, the diversity gain and the base station sensitivity; determining the maximum loss of downlink allowance according to the transmitting power of the base station, the loss of a combiner, the loss of a feeder line of the base station, the gain of an antenna of the base station, artificial loss, the gain of a terminal and the sensitivity of the terminal;
the condition judgment module is suitable for calculating the difference value of the uplink allowed maximum loss and the downlink allowed maximum loss and determining whether the switching condition is met according to the difference value;
and the switching module is suitable for triggering the switching of the user terminal from the LTE network to the 2G and/or 3G network if the difference value determines whether the switching condition is met.
7. A computing device, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the operation corresponding to the SRVCC switching method of any one of claims 1-5.
8. A computer storage medium having at least one executable instruction stored therein, the executable instruction causing a processor to perform operations corresponding to the SRVCC handover method according to any one of claims 1-5.
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