CN110650501B - Switching threshold adjusting method and device of session network - Google Patents
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Abstract
The invention discloses a switching threshold adjusting method of a session network, which presets a first switching threshold and a second switching threshold corresponding to each geographical position; acquiring data transmission parameters of a network where a terminal is currently located, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value; and when the first switching threshold is larger than a second switching threshold corresponding to the current geographical position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, and otherwise, determining the first switching threshold as the current switching threshold. The invention also discloses a device and a storage medium for adjusting the switching threshold of the session network.
Description
Technical Field
The present invention relates to the field of network handover technology in mobile communications, and in particular, to a method and an apparatus for adjusting a handover threshold of a session network.
Background
A wireless telephony (WFC, WiFi calling) is an important emerging technology in the fourth Generation + (4G +, 4th Generation +) communication network era, where WFC is an internet protocol Multimedia Subsystem (IMS, IP Multimedia Subsystem) video or voice call service based on a WiFi network, and a terminal user can perform IMS video or voice call in a WiFi environment; in the process of carrying out a Voice over Long Term Evolution (VoLTE) call, if entering an area with a mobile communication network covering environment which is not ideal, the mobile terminal can switch an IMS video or Voice call from the LTE network to the WiFi network to become a WFC call; in the switching process of WFC and VoLTE, the mobile terminal switches the conversation between a Wireless Local Area Network (WLAN) and a Radio Access Network (RAN), and the conversation quality is ensured to be not reduced, the conversation is not interrupted, and the user does not sense; however, the existing mobile terminal has the problem that the network switching threshold can not be flexibly and adaptively adjusted when the network is switched; for example: the signal of a Long Term Evolution (LTE) network is good, the signal strength is not lower than a switching threshold value, the throughput rate of an LTE data packet is reduced, the voice or video call quality is not high, if the priority mode configuration of the call function in the mobile terminal is a cellular (cellular) mode at the moment, the call cannot be immediately switched to a WiFi network even if the WiFi network signal is good; on the contrary, if the WiFi network signal is good, the signal strength is not yet lower than the handover threshold, but the throughput rate of the data packet has been reduced, which causes the voice or video call quality to be not high, if the priority mode configuration of the call function in the terminal is the WiFi network mode at this time, the call will not be immediately handed over to the LTE network even if the LTE network signal is good.
Therefore, how to adjust the switching threshold of the session network according to the actual network condition, improve the session quality, and improve the user experience is an urgent problem to be solved.
Disclosure of Invention
In view of this, embodiments of the present invention are expected to provide a method and an apparatus for adjusting a handover threshold of a session network, which can adjust the handover threshold of the session network according to an actual network condition, improve session quality, and improve user experience.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a switching threshold adjusting method of a session network, which comprises the following steps: presetting a first switching threshold and a second switching threshold corresponding to each geographical position; the method further comprises the following steps:
acquiring data transmission parameters of a network where a terminal is currently located, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value;
and when the first switching threshold is larger than a second switching threshold corresponding to the current geographical position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, and otherwise, determining the first switching threshold as the current switching threshold.
In the above scheme, the obtaining of the data transmission parameter of the network where the terminal is currently located and processing the data transmission parameter by using a preset offset value calculation rule to obtain a first correction offset value includes:
grading the data transmission parameters by adopting a preset grading rule to obtain a current call quality grade;
by using
Calculating the first correction offset value;
wherein S represents the first handover threshold, M represents the current call quality score, N represents a difference between the first handover threshold and a second handover threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range.
In the foregoing solution, the scoring the data transmission parameters by using a preset scoring rule to obtain a current call quality score includes:
acquiring the packet loss rate and the bidirectional communication bit rate of a current real-time transport protocol RTP data packet;
and subtracting the difference of the packet loss rate of the RTP data packet from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate and the quotient of the preset optimal bit rate to obtain the current conversation quality score.
In the above scheme, when the first switching threshold is greater than a second switching threshold corresponding to a current geographic location of the terminal, the method further includes:
in a preset time lag period, determining second correction offset values of more than one different time points by adopting the preset offset value calculation rule;
and when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value.
In the foregoing solution, the presetting of the second switching threshold corresponding to each geographic location includes:
acquiring more than one historical switching threshold which is used in the process of completing switching of the session network and corresponds to the geographic position;
and carrying out average processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position.
The embodiment of the invention also provides a switching threshold adjusting device of the session network, which comprises the following components: the device comprises a setting module, a determining module and a correcting module; wherein,
the setting module is used for presetting a first switching threshold and a second switching threshold corresponding to each geographical position;
the determining module is used for acquiring data transmission parameters of a network where the terminal is located at present, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value;
and the correction module is used for correcting the first switching threshold by adopting the first correction deviation value when the first switching threshold is larger than a second switching threshold corresponding to the current geographic position of the terminal to obtain the current switching threshold, and otherwise, determining the first switching threshold as the current switching threshold.
In the foregoing solution, the determining module is specifically configured to:
grading the data transmission parameters by adopting a preset grading rule to obtain a current call quality grade;
by using
Calculating the first correction offset value;
wherein S represents the first handover threshold, M represents the current call quality score, N represents a difference between the first handover threshold and a second handover threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range.
In the foregoing solution, the determining module is specifically configured to:
acquiring the packet loss rate and the bidirectional communication bit rate of a current real-time transport protocol RTP data packet;
and subtracting the difference of the packet loss rate of the RTP data packet from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate and the quotient of the preset optimal bit rate to obtain the current conversation quality score.
In the foregoing solution, the modification module is further configured to:
in a preset time lag period, determining second correction offset values of more than one different time points by adopting the preset offset value calculation rule;
and when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value.
In the foregoing solution, the setting module is specifically configured to:
acquiring more than one historical switching threshold which is used in the process of completing switching of the session network and corresponds to the geographic position;
and carrying out average processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position.
The embodiment of the present invention further provides a storage medium, where an executable program is stored, and when the executable program is executed by a processor, the method for adjusting the handover threshold of the session network according to any of the foregoing methods is implemented.
The embodiment of the invention also provides a threshold adjusting device, which comprises a processor, a memory and an executable program which is stored on the memory and can be operated by the processor, wherein when the processor operates the executable program, the step of executing any one of the methods for adjusting the switching threshold of the session network is executed.
The embodiment of the invention provides a switching threshold adjustment method and a switching threshold adjustment device for a session network; presetting a first switching threshold and a second switching threshold corresponding to each geographical position; acquiring data transmission parameters of a network where a terminal is currently located, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value; and when the first switching threshold is larger than a second switching threshold corresponding to the current geographical position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, and otherwise, determining the first switching threshold as the current switching threshold. Comparing the inherent first switching threshold with a second switching threshold which is counted and is suitable for network switching at the current geographic position in real time to determine switching time, and adjusting the switching threshold which is suitable for the current network condition in real time according to the current network data transmission parameters and the inherent first switching threshold; therefore, the switching threshold of the session network can be adjusted according to the actual condition of the network, so that the session quality is improved, and the user experience is improved.
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Fig. 1 is a schematic flowchart of a handover threshold adjustment method of a session network according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a handover threshold adjusting apparatus of a session network according to an embodiment of the present invention.
Detailed Description
In the embodiment of the invention, a first switching threshold and a second switching threshold corresponding to each geographic position are preset; acquiring data transmission parameters of a network where a terminal is currently located, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value; and when the first switching threshold is larger than a second switching threshold corresponding to the current geographical position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, and otherwise, determining the first switching threshold as the current switching threshold.
The present invention will be described in further detail with reference to examples.
As shown in fig. 1, a method for adjusting a switching threshold of a session network according to an embodiment of the present invention includes:
step 101: presetting a first switching threshold and a second switching threshold corresponding to each geographical position;
generally, the session network handover described herein refers to a handover between a WiFi network and a RAN network of a WFC-capable terminal; the session network is switched to a WiFi network in two conditions, one is switched to a RAN network from the WiFi network, and the other is switched to the WiFi network from the RAN network; when the terminal is switched from the WiFi network to the RAN network, the network signal strength of the current WiFi network is compared with a cut-out threshold, and the WiFi network is cut out when the network signal strength is lower than the cut-out threshold of the WiFi network. When the terminal is switched from the RAN network to the WiFi network, the network signal strength of the current RAN network is compared with a switching-out threshold, and the RAN network is switched out when the network signal strength is lower than the switching-out threshold of the RAN network. Therefore, the switching-out threshold determines the time of network switching;
here, when the terminal is in the WiFi network, the first switching threshold is a WiFi network switching-out threshold, and the second switching threshold is a WiFi network switching-out threshold corresponding to each geographic location; when the terminal is in the RAN network, the first switching threshold is a RAN network switching-out threshold, and the second switching threshold is a RAN network switching-out threshold corresponding to each geographic position respectively; the WiFi network switching-out threshold and the RAN network switching-out threshold can be the same or different;
here, the first handover threshold is set in the terminal, and is used for providing a threshold for handover of the session network; a first switching threshold may be set in a terminal supporting the WFC function; because the terminals adopt different platforms, the design of each terminal and the like, and the sensitivity of each terminal to the wireless communication network and the WiFi network is inconsistent, different first switching thresholds can be set according to different terminals;
the second switching threshold can be set in a cloud database and can be sent to the terminal through a wireless data network; the second switching threshold is used for providing a reference switching threshold of each geographic position for the terminal, and may be a statistical value of switching thresholds adopted by various terminals when network switching is successfully performed at the geographic position in the past.
The geographical position may be an actual geographical range or place, or may be a wireless communication cell, a WiFi network coverage, or the like, and the geographical position may be calibrated by using a cell ID, a frequency point, a primary scrambling code, a WiFi network SSID, or the like.
Furthermore, more than one historical switching threshold which is used in the completion of the session network switching and corresponds to the geographic position can be obtained; carrying out mean value processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position;
here, the operation rule may be set according to the actual situation of the switching threshold for completing the network switching at each geographic location, for example, for a certain geographic location, an arithmetic average value of a plurality of historical switching thresholds used by various terminals when the network switching is successfully performed at the geographic location in the past may be taken as a second switching threshold; and a plurality of historical switching thresholds of different periods of a certain geographic position can be calculated in a weighted average mode to obtain a second switching threshold.
In practical application, the average value of the switching thresholds of a plurality of users nearest to the current area during multiple successful switching can be obtained, and the average value is used as a second switching threshold and uploaded to a cloud database or a network server for the terminal to call.
Step 102: acquiring data transmission parameters of a network where a terminal is currently located, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value;
here, the current network data transmission parameter may be obtained from statistical data in the current network transmission process; the current network can be a network where the WFC functional terminal is currently located; the network condition can be evaluated in a mode of acquiring network data transmission parameters in real time, and a first correction deviation value is determined according to an evaluation result; the first modified offset value may be used to modify a first handover threshold.
Further, scoring the data transmission parameters by adopting a preset scoring rule to obtain a current call quality score; the first modified offset value may be calculated using expression (1);
wherein, S represents the first switching threshold, M represents the current call quality score, N represents a difference between the first switching threshold minus a second switching threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range;
here, T may adjust the range of the ratio of N/M between 0 and 1, so the range of the first correction offset value may be adjusted; the preset correction offset value range may be generally between 0 and 0.5S, and the preset correction offset value range may be considered as a step size for adjusting each correction of the first switching threshold.
Furthermore, the packet loss rate and the bidirectional communication bit rate of the current real-time transport protocol RTP data packet can be obtained; subtracting the difference of the packet loss rates of the RTP data packets from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate divided by the preset optimal bit rate to obtain the current conversation quality score;
here, the quality score range may be preset, for example, the set range may be 0 to 5, or 0 to 10, etc.; the first correction offset values resulting from the different ranges may be adjusted by T during the calculation. Scoring the call quality according to the packet loss rate of an RTP data packet and the bit rate of the two-way call, namely the bit rate of a voice or video frame packet, wherein the score value M and the packet loss rate of the RTP data packet are in an inverse linear relation, namely the higher the packet loss rate is, the lower the M score is; the M value and the two-way call bit rate value are in a positive linear relation, and the higher the two-way call bit rate is, the higher the M value is; the calculation equation can be simplified as follows: m ═ (packet loss rate of 1-RTP packets) × (bi-directional talk bit rate/theoretical optimal bit rate); the theoretical optimal bit rate may be a theoretical optimal bit rate of the current network at the current geographic location.
Step 103: when the first switching threshold is larger than a second switching threshold corresponding to the current geographic position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, otherwise, determining the first switching threshold as the current switching threshold;
here, the current geographical location may be a geographical location where the WFC function terminal is currently located; when the first switching threshold is larger than the second switching threshold corresponding to the current geographic position, at this time, the first correction offset value is larger than 0, which indicates that the switching threshold stored in the terminal is more difficult to reach than the empirical switching threshold of the current position, the switching threshold can be adjusted, the network switching condition is reduced, and the first switching threshold can be corrected and expressed by expression (2);
when the first switching threshold is less than or equal to a second switching threshold corresponding to the current geographic position, at this time, a first correction deviation value is less than or equal to 0; it means that the network handover is more likely to occur by using the first handover threshold as the current handover threshold, and therefore, the first handover threshold may be determined as the current handover threshold.
Further, in a preset time lag period, determining second correction offset values of more than one different time points by adopting the preset offset value calculation rule; when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value;
specifically, time lag can be increased to reduce threshold jitter and avoid ping-pong effect; the first switching threshold is only modified if the condition is met during the time lag period. A time lag timer may be set, a mean value of all second correction offset values may be calculated within a period of the time lag timer, and when a certain percentage of the second correction offset values is greater than the mean value, the first switching threshold may be corrected using the first correction offset value. Wherein the skew timer may be set to 0 to 60 seconds; the proportion may be not less than 50%.
After the network switching is successful, the terminal can report the current position information such as cell ID, frequency point, main scrambling code terminal equipment number, WiFi network SSID, actual switching threshold during network switching and the like to a cloud database or a network server and the like. The information reported here can be used to calculate the second handover threshold.
As shown in fig. 2, the device for adjusting the switching threshold of the session network according to the embodiment of the present invention includes: a setting module 21, a determining module 22 and a correcting module 23; wherein,
the setting module 21 is configured to preset a first switching threshold and a second switching threshold corresponding to each geographic location;
generally, the session network handover described herein refers to a handover between a WiFi network and a RAN network of a WFC-capable terminal; the session network is switched to a WiFi network in two conditions, one is switched to a RAN network from the WiFi network, and the other is switched to the WiFi network from the RAN network; when the terminal is switched from the WiFi network to the RAN network, the network signal strength of the current WiFi network is compared with a cut-out threshold, and the WiFi network is cut out when the network signal strength is lower than the cut-out threshold of the WiFi network. When the terminal is switched from the RAN network to the WiFi network, the network signal strength of the current RAN network is compared with a switching-out threshold, and the RAN network is switched out when the network signal strength is lower than the switching-out threshold of the RAN network. Therefore, the switching-out threshold determines the time of network switching;
here, when the terminal is in the WiFi network, the first switching threshold is a WiFi network switching-out threshold, and the second switching threshold is a WiFi network switching-out threshold corresponding to each geographic location; when the terminal is in the RAN network, the first switching threshold is a RAN network switching-out threshold, and the second switching threshold is a RAN network switching-out threshold corresponding to each geographic position respectively; the WiFi network switching-out threshold and the RAN network switching-out threshold can be the same or different;
here, the first handover threshold is set in the terminal, and is used for providing a threshold for handover of the session network; a first switching threshold may be set in a terminal supporting the WFC function; because the terminals adopt different platforms, the design of each terminal and the like, and the sensitivity of each terminal to the wireless communication network and the WiFi network is inconsistent, different first switching thresholds can be set according to different terminals;
the second switching threshold can be set in a cloud database and can be sent to the terminal through a wireless data network; the second switching threshold is used for providing a reference switching threshold of each geographic position for the terminal, and may be a statistical value of switching thresholds adopted by various terminals when network switching is successfully performed at the geographic position in the past.
The geographical position may be an actual geographical range or place, or may be a wireless communication cell, a WiFi network coverage, or the like, and the geographical position may be calibrated by using a cell ID, a frequency point, a primary scrambling code, a WiFi network SSID, or the like.
Furthermore, more than one historical switching threshold which is used in the completion of the session network switching and corresponds to the geographic position can be obtained; carrying out mean value processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position;
here, the operation rule may be set according to the actual situation of the switching threshold for completing the network switching at each geographic location, for example, for a certain geographic location, an arithmetic average value of a plurality of historical switching thresholds used by various terminals when the network switching is successfully performed at the geographic location in the past may be taken as a second switching threshold; and a plurality of historical switching thresholds of different periods of a certain geographic position can be calculated in a weighted average mode to obtain a second switching threshold.
In practical application, the average value of the switching thresholds of a plurality of users nearest to the current area during multiple successful switching can be obtained, and the average value is used as a second switching threshold and uploaded to a cloud database or a network server for the terminal to call.
The determining module 22 is configured to obtain a data transmission parameter of a network where the terminal is currently located, and process the data transmission parameter by using a preset offset value calculation rule to obtain a first correction offset value;
here, the network condition may be evaluated by acquiring a network data transmission parameter in real time, and a first correction offset value may be determined according to an evaluation result; the first modified offset value may be used to modify a first handover threshold.
Further, scoring the data transmission parameters by adopting a preset scoring rule to obtain a current call quality score; the first modified offset value may be calculated using expression (1);
wherein, S represents the first switching threshold, M represents the current call quality score, N represents a difference between the first switching threshold minus a second switching threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range;
here, T may adjust the range of the ratio of N/M between 0 and 1, so the range of the first correction offset value may be adjusted; the preset correction offset value range may be generally between 0 and 0.5S, and the preset correction offset value range may be considered as a step size for adjusting each correction of the first switching threshold.
Furthermore, the packet loss rate and the bidirectional communication bit rate of the current real-time transport protocol RTP data packet can be obtained; subtracting the difference of the packet loss rates of the RTP data packets from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate divided by the preset optimal bit rate to obtain the current conversation quality score;
here, the quality score range may be preset, for example, the set range may be 0 to 5, or 0 to 10, etc.; the first correction offset values resulting from the different ranges may be adjusted by T during the calculation. Scoring the call quality according to the packet loss rate of an RTP data packet and the bit rate of the two-way call, namely the bit rate of a voice or video frame packet, wherein the score value M and the packet loss rate of the RTP data packet are in an inverse linear relation, namely the higher the packet loss rate is, the lower the M score is; the M value and the two-way call bit rate value are in a positive linear relation, and the higher the two-way call bit rate is, the higher the M value is; the calculation equation can be simplified as follows: m ═ (packet loss rate of 1-RTP packets) × (bi-directional talk bit rate/theoretical optimal bit rate); the theoretical optimal bit rate may be a theoretical optimal bit rate of the current network at the current geographic location.
The correcting module 23 is configured to correct the first handover threshold by using the first correction offset value when the first handover threshold is greater than a second handover threshold corresponding to a current geographic location of the terminal, so as to obtain a current handover threshold, and otherwise, determine the first handover threshold as the current handover threshold;
when the first switching threshold is larger than the second switching threshold corresponding to the current geographic position, at this time, the first correction offset value is larger than 0, which indicates that the switching threshold stored in the terminal is more difficult to reach than the empirical switching threshold of the current position, the switching threshold can be adjusted, the network switching condition is reduced, and the first switching threshold can be corrected and expressed by expression (2);
when the first switching threshold is less than or equal to a second switching threshold corresponding to the current geographic position, at this time, a first correction deviation value is less than or equal to 0; it means that the network handover is more likely to occur by using the first handover threshold as the current handover threshold, and therefore, the first handover threshold may be determined as the current handover threshold.
Further, in a preset time lag period, determining second correction offset values of more than one different time points by adopting the preset offset value calculation rule; when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value;
specifically, time lag can be increased to reduce threshold jitter and avoid ping-pong effect; the first switching threshold is only modified if the condition is met during the time lag period. A time lag timer may be set, a mean value of all second correction offset values may be calculated within a period of the time lag timer, and when a certain percentage of the second correction offset values is greater than the mean value, the first switching threshold may be corrected using the first correction offset value. Wherein the skew timer may be set to 0 to 60 seconds; the proportion may be not less than 50%.
After the network switching is successful, the terminal can report the current position information such as cell ID, frequency point, main scrambling code terminal equipment number, WiFi network SSID, actual switching threshold during network switching and the like to a cloud database or a network server and the like. The information reported here can be used to calculate the second handover threshold.
In practical applications, the setting module 21, the determining module 22 and the modifying module 23 may be implemented by a CPU, a Microprocessor (MCU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like in the terminal.
The storage medium provided in the embodiment of the present invention stores thereon an executable program, and the executable program, when executed by a processor, implements a method for adjusting a handover threshold of a session network, as shown in fig. 1, where the method includes:
step 101: presetting a first switching threshold and a second switching threshold corresponding to each geographical position;
generally, the session network handover described herein refers to a handover between a WiFi network and a RAN network of a WFC-capable terminal; the session network is switched to a WiFi network in two conditions, one is switched to a RAN network from the WiFi network, and the other is switched to the WiFi network from the RAN network; when the terminal is switched from the WiFi network to the RAN network, the network signal strength of the current WiFi network is compared with a cut-out threshold, and the WiFi network is cut out when the network signal strength is lower than the cut-out threshold of the WiFi network. When the terminal is switched from the RAN network to the WiFi network, the network signal strength of the current RAN network is compared with a switching-out threshold, and the RAN network is switched out when the network signal strength is lower than the switching-out threshold of the RAN network. Therefore, the switching-out threshold determines the time of network switching;
here, when the terminal is in the WiFi network, the first switching threshold is a WiFi network switching-out threshold, and the second switching threshold is a WiFi network switching-out threshold corresponding to each geographic location; when the terminal is in the RAN network, the first switching threshold is a RAN network switching-out threshold, and the second switching threshold is a RAN network switching-out threshold corresponding to each geographic position respectively; the WiFi network switching-out threshold and the RAN network switching-out threshold can be the same or different;
here, the first handover threshold is set in the terminal, and is used for providing a threshold for handover of the session network; a first switching threshold may be set in a terminal supporting the WFC function; because the terminals adopt different platforms, the design of each terminal and the like, and the sensitivity of each terminal to the wireless communication network and the WiFi network is inconsistent, different first switching thresholds can be set according to different terminals;
the second switching threshold can be set in a cloud database and can be sent to the terminal through a wireless data network; the second switching threshold is used for providing a reference switching threshold of each geographic position for the terminal, and may be a statistical value of switching thresholds adopted by various terminals when network switching is successfully performed at the geographic position in the past.
The geographical position may be an actual geographical range or place, or may be a wireless communication cell, a WiFi network coverage, or the like, and the geographical position may be calibrated by using a cell ID, a frequency point, a primary scrambling code, a WiFi network SSID, or the like.
Furthermore, more than one historical switching threshold which is used in the completion of the session network switching and corresponds to the geographic position can be obtained; carrying out mean value processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position;
here, the operation rule may be set according to the actual situation of the switching threshold for completing the network switching at each geographic location, for example, for a certain geographic location, an arithmetic average value of a plurality of historical switching thresholds used by various terminals when the network switching is successfully performed at the geographic location in the past may be taken as a second switching threshold; and a plurality of historical switching thresholds of different periods of a certain geographic position can be calculated in a weighted average mode to obtain a second switching threshold.
In practical application, the average value of the switching thresholds of a plurality of users nearest to the current area during multiple successful switching can be obtained, and the average value is used as a second switching threshold and uploaded to a cloud database or a network server for the terminal to call.
Step 102: acquiring data transmission parameters of a network where a terminal is currently located, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value;
here, the network condition may be evaluated by acquiring a network data transmission parameter in real time, and a first correction offset value may be determined according to an evaluation result; the first modified offset value may be used to modify a first handover threshold.
Further, scoring the data transmission parameters by adopting a preset scoring rule to obtain a current call quality score; the first modified offset value may be calculated using expression (1);
wherein, S represents the first switching threshold, M represents the current call quality score, N represents a difference between the first switching threshold minus a second switching threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range;
here, T may adjust the range of the ratio of N/M between 0 and 1, so the range of the first correction offset value may be adjusted; the preset correction offset value range may be generally between 0 and 0.5S, and the preset correction offset value range may be considered as a step size for adjusting each correction of the first switching threshold.
Furthermore, the packet loss rate and the bidirectional communication bit rate of the current real-time transport protocol RTP data packet can be obtained; subtracting the difference of the packet loss rates of the RTP data packets from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate divided by the preset optimal bit rate to obtain the current conversation quality score;
here, the quality score range may be preset, for example, the set range may be 0 to 5, or 0 to 10, etc.; the first correction offset values resulting from the different ranges may be adjusted by T during the calculation. Scoring the call quality according to the packet loss rate of an RTP data packet and the bit rate of the two-way call, namely the bit rate of a voice or video frame packet, wherein the score value M and the packet loss rate of the RTP data packet are in an inverse linear relation, namely the higher the packet loss rate is, the lower the M score is; the M value and the two-way call bit rate value are in a positive linear relation, and the higher the two-way call bit rate is, the higher the M value is; the calculation equation can be simplified as follows: m ═ (packet loss rate of 1-RTP packets) × (bi-directional talk bit rate/theoretical optimal bit rate); the theoretical optimal bit rate may be a theoretical optimal bit rate of the current network at the current geographic location.
Step 103: when the first switching threshold is larger than a second switching threshold corresponding to the current geographic position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, otherwise, determining the first switching threshold as the current switching threshold;
when the first switching threshold is larger than the second switching threshold corresponding to the current geographic position, at this time, the first correction offset value is larger than 0, which indicates that the switching threshold stored in the terminal is more difficult to reach than the empirical switching threshold of the current position, the switching threshold can be adjusted, the network switching condition is reduced, and the first switching threshold can be corrected and expressed by expression (2);
when the first switching threshold is less than or equal to a second switching threshold corresponding to the current geographic position, at this time, a first correction deviation value is less than or equal to 0; it means that the network handover is more likely to occur by using the first handover threshold as the current handover threshold, and therefore, the first handover threshold may be determined as the current handover threshold.
Further, in a preset time lag period, determining second correction offset values of more than one different time points by adopting the preset offset value calculation rule; when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value;
specifically, time lag can be increased to reduce threshold jitter and avoid ping-pong effect; the first switching threshold is only modified if the condition is met during the time lag period. A time lag timer may be set, a mean value of all second correction offset values may be calculated within a period of the time lag timer, and when a certain percentage of the second correction offset values is greater than the mean value, the first switching threshold may be corrected using the first correction offset value. Wherein the skew timer may be set to 0 to 60 seconds; the proportion may be not less than 50%.
After the network switching is successful, the terminal can report the current position information such as cell ID, frequency point, main scrambling code terminal equipment number, WiFi network SSID, actual switching threshold during network switching and the like to a cloud database or a network server and the like. The information reported here can be used to calculate the second handover threshold.
The threshold adjusting apparatus provided in the embodiment of the present invention includes a processor, a memory, and an executable program stored in the memory and capable of being run by the processor, and when the processor runs the executable program, the threshold adjusting method for implementing a switching threshold of a session network is executed, as shown in fig. 1, the method includes:
step 101: presetting a first switching threshold and a second switching threshold corresponding to each geographical position;
generally, the session network handover described herein refers to a handover between a WiFi network and a RAN network of a WFC-capable terminal; the session network is switched to a WiFi network in two conditions, one is switched to a RAN network from the WiFi network, and the other is switched to the WiFi network from the RAN network; when the terminal is switched from the WiFi network to the RAN network, the network signal strength of the current WiFi network is compared with a cut-out threshold, and the WiFi network is cut out when the network signal strength is lower than the cut-out threshold of the WiFi network. When the terminal is switched from the RAN network to the WiFi network, the network signal strength of the current RAN network is compared with a switching-out threshold, and the RAN network is switched out when the network signal strength is lower than the switching-out threshold of the RAN network. Therefore, the switching-out threshold determines the time of network switching;
here, when the terminal is in the WiFi network, the first switching threshold is a WiFi network switching-out threshold, and the second switching threshold is a WiFi network switching-out threshold corresponding to each geographic location; when the terminal is in the RAN network, the first switching threshold is a RAN network switching-out threshold, and the second switching threshold is a RAN network switching-out threshold corresponding to each geographic position respectively; the WiFi network switching-out threshold and the RAN network switching-out threshold can be the same or different;
here, the first handover threshold is set in the terminal, and is used for providing a threshold for handover of the session network; a first switching threshold may be set in a terminal supporting the WFC function; because the terminals adopt different platforms, the design of each terminal and the like, and the sensitivity of each terminal to the wireless communication network and the WiFi network is inconsistent, different first switching thresholds can be set according to different terminals;
the second switching threshold can be set in a cloud database and can be sent to the terminal through a wireless data network; the second switching threshold is used for providing a reference switching threshold of each geographic position for the terminal, and may be a statistical value of switching thresholds adopted by various terminals when network switching is successfully performed at the geographic position in the past.
The geographical position may be an actual geographical range or place, or may be a wireless communication cell, a WiFi network coverage, or the like, and the geographical position may be calibrated by using a cell ID, a frequency point, a primary scrambling code, a WiFi network SSID, or the like.
Furthermore, more than one historical switching threshold which is used in the completion of the session network switching and corresponds to the geographic position can be obtained; carrying out mean value processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position;
here, the operation rule may be set according to the actual situation of the switching threshold for completing the network switching at each geographic location, for example, for a certain geographic location, an arithmetic average value of a plurality of historical switching thresholds used by various terminals when the network switching is successfully performed at the geographic location in the past may be taken as a second switching threshold; and a plurality of historical switching thresholds of different periods of a certain geographic position can be calculated in a weighted average mode to obtain a second switching threshold.
In practical application, the average value of the switching thresholds of a plurality of users nearest to the current area during multiple successful switching can be obtained, and the average value is used as a second switching threshold and uploaded to a cloud database or a network server for the terminal to call.
Step 102: acquiring data transmission parameters of a network where a terminal is currently located, and processing the data transmission parameters by adopting a preset offset value calculation rule to obtain a first correction offset value;
here, the network condition may be evaluated by acquiring a network data transmission parameter in real time, and a first correction offset value may be determined according to an evaluation result; the first modified offset value may be used to modify a first handover threshold.
Further, scoring the data transmission parameters by adopting a preset scoring rule to obtain a current call quality score; the first modified offset value may be calculated using expression (1);
wherein, S represents the first switching threshold, M represents the current call quality score, N represents a difference between the first switching threshold minus a second switching threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range;
here, T may adjust the range of the ratio of N/M between 0 and 1, so the range of the first correction offset value may be adjusted; the preset correction offset value range may be generally between 0 and 0.5S, and the preset correction offset value range may be considered as a step size for adjusting each correction of the first switching threshold.
Furthermore, the packet loss rate and the bidirectional communication bit rate of the current real-time transport protocol RTP data packet can be obtained; subtracting the difference of the packet loss rates of the RTP data packets from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate divided by the preset optimal bit rate to obtain the current conversation quality score;
here, the quality score range may be preset, for example, the set range may be 0 to 5, or 0 to 10, etc.; the first correction offset values resulting from the different ranges may be adjusted by T during the calculation. Scoring the call quality according to the packet loss rate of an RTP data packet and the bit rate of the two-way call, namely the bit rate of a voice or video frame packet, wherein the score value M and the packet loss rate of the RTP data packet are in an inverse linear relation, namely the higher the packet loss rate is, the lower the M score is; the M value and the two-way call bit rate value are in a positive linear relation, and the higher the two-way call bit rate is, the higher the M value is; the calculation equation can be simplified as follows: m ═ (packet loss rate of 1-RTP packets) × (bi-directional talk bit rate/theoretical optimal bit rate); the theoretical optimal bit rate may be a theoretical optimal bit rate of the current network at the current geographic location.
Step 103: when the first switching threshold is larger than a second switching threshold corresponding to the current geographic position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, otherwise, determining the first switching threshold as the current switching threshold;
when the first switching threshold is larger than the second switching threshold corresponding to the current geographic position, at this time, the first correction offset value is larger than 0, which indicates that the switching threshold stored in the terminal is more difficult to reach than the empirical switching threshold of the current position, the switching threshold can be adjusted, the network switching condition is reduced, and the first switching threshold can be corrected and expressed by expression (2);
when the first switching threshold is less than or equal to a second switching threshold corresponding to the current geographic position, at this time, a first correction deviation value is less than or equal to 0; it means that the network handover is more likely to occur by using the first handover threshold as the current handover threshold, and therefore, the first handover threshold may be determined as the current handover threshold.
Further, in a preset time lag period, determining second correction offset values of more than one different time points by adopting the preset offset value calculation rule; when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value;
specifically, time lag can be increased to reduce threshold jitter and avoid ping-pong effect; the first switching threshold is only modified if the condition is met during the time lag period. A time lag timer may be set, a mean value of all second correction offset values may be calculated within a period of the time lag timer, and when a certain percentage of the second correction offset values is greater than the mean value, the first switching threshold may be corrected using the first correction offset value. Wherein the skew timer may be set to 0 to 60 seconds; the proportion may be not less than 50%.
After the network switching is successful, the terminal can report the current position information such as cell ID, frequency point, main scrambling code terminal equipment number, WiFi network SSID, actual switching threshold during network switching and the like to a cloud database or a network server and the like. The information reported here can be used to calculate the second handover threshold.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for adjusting a handover threshold of a session network, the method comprising: presetting a first switching threshold and a second switching threshold corresponding to each geographical position; the method further comprises the following steps:
grading the data transmission parameters by adopting a preset grading rule to obtain a current call quality grade;
by using
Calculating a first correction offset value; wherein, S represents the first switching threshold, M represents the current call quality score, N represents a difference between the first switching threshold minus a second switching threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range;
and when the first switching threshold is larger than a second switching threshold corresponding to the current geographical position of the terminal, correcting the first switching threshold by adopting the first correction deviation value to obtain the current switching threshold, and otherwise, determining the first switching threshold as the current switching threshold.
2. The method of claim 1, wherein the scoring the data transmission parameters using a preset scoring rule to obtain a current call quality score comprises:
acquiring the packet loss rate and the bidirectional communication bit rate of a current real-time transport protocol RTP data packet;
and subtracting the difference of the packet loss rate of the RTP data packet from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate and the quotient of the preset optimal bit rate to obtain the current conversation quality score.
3. The method of claim 2, wherein when the first handover threshold is greater than a second handover threshold corresponding to a current geographical location of the terminal, the method further comprises:
within a preset time lag period, adopting the method
Calculating the first correction offset value, and determining more than one correction offset valueA second modified offset value at a different time point;
and when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value.
4. The method according to any one of claims 1 to 3, wherein the presetting of the second handover threshold corresponding to each geographic location includes:
acquiring more than one historical switching threshold which is used in the process of completing switching of the session network and corresponds to the geographic position;
and carrying out average processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position.
5. An apparatus for adjusting handover threshold of session network, the apparatus comprising: the device comprises a setting module, a determining module and a correcting module; wherein,
the setting module is used for presetting a first switching threshold and a second switching threshold corresponding to each geographical position;
the determining module is used for scoring the data transmission parameters by adopting a preset scoring rule to obtain a current call quality score; by using
Calculating a first correction offset value; wherein, S represents the first switching threshold, M represents the current call quality score, N represents a difference between the first switching threshold minus a second switching threshold corresponding to the current geographical location, and T represents a preset adjustment coefficient for adjusting the first correction offset value to a preset correction offset value range;
and the correction module is used for correcting the first switching threshold by adopting the first correction deviation value when the first switching threshold is larger than a second switching threshold corresponding to the current geographic position of the terminal to obtain the current switching threshold, and otherwise, determining the first switching threshold as the current switching threshold.
6. The apparatus of claim 5, wherein the determining module is specifically configured to:
acquiring the packet loss rate and the bidirectional communication bit rate of a current real-time transport protocol RTP data packet;
and subtracting the difference of the packet loss rate of the RTP data packet from 1, and multiplying the difference by the product of the conversation two-way conversation bit rate and the quotient of the preset optimal bit rate to obtain the current conversation quality score.
7. The apparatus of claim 6, wherein the modification module is further configured to:
within a preset time lag period, adopting the method
Calculating a calculation rule of the first correction offset value, and determining second correction offset values of more than one different time points;
and when the number ratio of the second correction deviation values larger than the average value of all the second correction deviation values is larger than a preset value, correcting the first switching threshold by adopting the first correction deviation value.
8. The device according to any one of claims 5 to 7, wherein the setting module is specifically configured to:
acquiring more than one historical switching threshold which is used in the process of completing switching of the session network and corresponds to the geographic position;
and carrying out average processing on the historical switching threshold corresponding to the geographic position to obtain a second switching threshold corresponding to the geographic position.
9. A storage medium on which an executable program is stored, wherein the executable program, when executed by a processor, performs the steps of the handover threshold adjustment method of a session network according to any one of claims 1 to 4.
10. A threshold adjustment device comprising a processor, a memory and an executable program stored on the memory and capable of being executed by the processor, wherein the processor executes the executable program to perform the steps of the handover threshold adjustment method of the session network according to any one of claims 1 to 4.
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