CN101193413B - A multi-network mode switching method and its communication device - Google Patents
A multi-network mode switching method and its communication device Download PDFInfo
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Abstract
The invention discloses a method for switching the multi-network mode, which comprises the following steps: the measurement cycle is separated from the switching decision-making cycle and the switching decision-making cycle is adjusted according to the variation condition of the network, and a network mode switching threshold is dynamically and comprehensively adjusted according to the duration probability and/or network priority factor under different network modes so as to realize the switching between a plurality of network modes. The invention simultaneously discloses a multi-network-mode communication device, which comprises a network mode measurement module, a switching decision-making cycle setting and adjusting module, a network mode switching decision-making module and a network mode switching execution module. By providing a method for switching the multi-network mode and a communication device thereof, the invention ensures that the multi-network-mode communication device better adapts to the variation of the network conditions and simultaneously greatly solves the problems of network ping pong switching and imbalance of the network development in the staggered coverage areas of 2G and 3G, enhances the stability of the network resident and services and lowers the power consumption of the multi-network-mode communication device.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a multi-network mode switching method and a communication device thereof.
Background
With the rapid increase of the number of mobile users, the mobile communication network is loaded more and more, so that the communication terminal is likely to have phenomena like disconnection, crosstalk, poor voice quality, difficulty in accessing the internet and the like during communication, thereby greatly affecting the communication service quality. In response to this situation, a dual mode communication terminal has appeared which supports both the Second Generation (2G) network and the Third Generation (3G) network.
As a second generation network with a mature technology, a global system for Mobile Communication (GSM) can conveniently provide a local call function, and a third generation network can fully embody the advantage of high-speed data transmission thereof, for example, a Time Division-Synchronous Code Division multiple access (TD-SCDMA) technology is adopted to continuously extend high-speed data services.
Fig. 1 is a system block diagram of a dual-mode communication terminal supporting GSM/TD-SCDMA two network modes in the prior art, which includes an air interface signal 101, a 2G network mode module 102 of the dual-mode communication terminal, a 3G network mode module 103 of the dual-mode communication terminal, a network mode switching determination module 104, and a network mode switching execution module 105. The 2G network mode module 102 of the dual-mode communication terminal specifically includes a GSM service module 1021 and a TD-SCDMA measurement module 1022, and the 3G network mode module 103 of the dual-mode communication terminal includes a TD-SCDMA service module 1031 and a GSM measurement module 1032. The air interface signal 101 is a signal received by the dual-mode communication terminal during operation.
In the 2G network mode module 102, the GSM service module 1021 is used to implement GSM service; the TD-SCDMA measurement module 1022 is configured to set a measurement period, and when receiving a measurement command sent by the GSM service module 1021, perform cross-network mode measurement to obtain a Received Signal Strength Indicator (RSSI) value of a received Signal in the TD-SCDMA network mode.
In the 3G network mode module 103, the TD-SCDMA service module 1031 is configured to implement TD-SCDMA service; the GSM measurement module 1032 is configured to set a measurement period, and when receiving the measurement command of the TD-SCDMA service module 1031, perform cross-network mode measurement to obtain an RSSI value of a received signal in a GSM network mode.
The network mode switching determining module 104 is configured to determine whether to perform switching according to the measured RSSI value of another network mode and a predetermined network mode switching threshold at an optimal switching time point in the switching determining period, and send a signal to notify the network mode switching performing module 105 to perform network mode switching when the switching needs to be performed. The switching execution module 105 is configured to receive an execution signal sent by the network mode switching determination module 104, and switch the communication terminal from the current network mode to another network mode.
At present, a dual-mode communication terminal does not have a mature market application product, and the specific steps of a network mode switching method of the dual-mode terminal in a development stage are as follows:
And 2, setting a switching period by taking the measurement period as a reference, additionally setting a switching threshold, and judging a switching condition by a network mode switching judgment module according to the switching period.
When receiving a measurement command, the dual-mode communication terminal working in one network mode carries out cross-network mode measurement on a signal in another network mode in a switching period by a measurement module so as to obtain an RSSI value of the signal received in the other network mode. Comparing the measured RSSI value with a preset switching threshold value at the end of the switching period, namely when the switching time arrives,
and 3, the network mode switching execution module executes subsequent operation according to the judgment result.
If the measured RSSI value is larger than the switching threshold value, the switching condition is considered to be met, and the switching from the current network mode to another network mode is executed, otherwise, the switching condition is considered not to be met, the switching is not executed, and the mobile terminal continues to work in the original network mode.
Based on the method, the network mode switching process of the existing dual-mode communication terminal has many defects.
First, in the prior art, since the communication terminal operates in one network mode and simultaneously detects the RSSI value in another network mode, in order to reduce the system load and complexity, the prior art generally sets the measurement period to be longer, such as 10 minutes, or even longer. Therefore, the dual-mode communication terminal has larger delay for detecting the network coverage condition, and the reflecting speed of the dual-mode communication terminal is slower.
Next, in the prior art, the switching determination period is fixed, and usually after 1 measurement period or after a predetermined number of measurement periods. In this way, since the handover period is fixed and the handover performance is not changed, there is a lack of adaptability to changes in network conditions. And, as long as the received signal strength in the measurement period is greater than the predetermined network mode switching threshold, the switching is executed, if the measured signal is a false signal with a relatively high strength, such as a test signal sent by a network test vehicle, erroneous judgment is caused, so that the method is easily affected by the false signal, and phenomena such as terminal periodic call drop occur, which affect the stability of the current Service, and reduce the Quality of Service (QoS) of the network mode in which the terminal is located, which makes blind switching of the communication terminal unacceptable.
In addition, in the prior art, a fixed handover strategy is employed. As long as the measured RSSI value of the received signal is greater than a predetermined switching threshold, a network mode switch is performed. Although this method is simple and easy, it is easy to switch the 2G and 3G network modes too frequently in the area covered by the 2G and 3G interlaced coverage because the necessary distinction is not provided for the 2G and 3G network modes and the network mode distribution of the communication terminal is not considered, which results in waste of power consumption, affects the standby performance of the dual-mode communication terminal and also affects the stability of the service. Meanwhile, the 3G network is not fully utilized in this way, and the characteristic of high communication rate of the 3G network is exerted, so that the method is not beneficial to the stability and further expansion of the 3G service.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a multi-network mode switching method and a communication device thereof, which can improve the data rate of communication, ensure the stability of the existing service, and avoid blind switching between network modes.
The invention provides a method for switching a multi-network mode. The method comprises the following steps:
a) presetting a measurement period TmPerforming cross-network mode measurement in a measurement period to obtain a received signal strength indicating value in other network modes except the network mode;
b) counting the residence probability D of the system in each network mode in a plurality of recent measurement periods respectively, and setting a weight factor P representing the preferential selection degree of different network modes;
c) according to the residence probability D and the weight factor P, the RSSI of the network mode switching threshold is adjustedGate；
d) Setting a switching determination period TaJudging whether the received signal strength indicated value is larger than the network mode switching threshold RSSI or not in the switching judging periodGate(ii) a If so, a handover is performed.
In step b) of the method, the residence probability D is counted according to the following formula:
DG＝CG/M，DT＝CT/M
in the formula, DGRepresenting the probability of residence of the system in the first network mode, DTIndicating the parking of the system in the second network modeProbability of retention, CGRepresenting the number of times the system is in the first network mode during M measurement periods, CTRepresenting the number of times the system is in the second network mode for M measurement periods, M being a natural number.
In step c), the method adjusts the RSSI according to the following formulaGate：
RSSIGate＝RSSIIni+(0.5-D)*R1+(0.5-P)*R2
In the formula, R1，R2In order to adjust the constant, the value range is between 5 dBm and 10dBm, and the RSSIIniIs the network mode switching threshold initial value.
In the method, a weight factor for the degree of preference of the first network mode is represented as PGThe degree of preference for the second network mode is denoted as PTAnd is and
PG+PT＝1。
in the method, a weight factor for the degree of preference of the first network mode is represented as PGThe degree of preference for the second network mode is denoted as PTAnd is and
PG＝PT＝1。
in step d) of the method, the switching judgment period T is setaSee the formula:
Ta＝N*Tm
in the formula, N is a natural number, and N is more than or equal to 1 and less than or equal to Nmax，NmaxThe method is the longest switching time that the system can endure, and the initial value of N is set to be N when the system starts to operateiniSize is to NmaxThe rounded value on/2.
The method step d) sets the switching judgment period TaFurther comprises determining the optimal switching time point in the switching judgment period, and presetting the measurement index value MindexIs 0, and measures the index value M after each cross-network mode measurement is finishedindexIncrement in a mode of adding 1, and measuring the index value M in one measuring periodindexWhen N, there is an optimal time point for switching network mode in the measurement period.
The method further comprises the steps of recording a switching mark value g _ Handover _ Success _ Flg representing a switching result after the step d), and adjusting a switching judgment period according to the switching mark value.
The method comprises the following steps that the switching mark value g _ Handover _ Success _ Flg comprises the following steps:
a switching mark value g _ GSM2TDD _ Handover _ Success _ Flg representing a switching result from the first network mode to the second network mode and a switching mark value g _ TDD2GSM _ Handover _ Success _ Flg representing a switching result from the first network mode to the second network mode; if the first network mode is successfully switched to the second network mode, g _ GSM2TDD _ Handover _ Success _ Flg is 1, and if the first network mode is failed, g _ GSM2TDD _ Handover _ Success _ Flg is-1; if the second network mode is successfully switched to the first network mode, g _ TDD2GSM _ Handover _ Success _ Flg is 1, and if the second network mode is failed, g _ TDD2GSM _ Handover _ Success _ Flg is-1; if the network mode is switched to the initial network mode, the switch flag value is 0.
According to the method, the switching judgment period is adjusted according to the switching flag value, which is shown in a formula:
N＝N′-g_Handover_Success_Flg
in the formula, N 'is a value after the last switching judgment period is adjusted, if the adjustment is the first adjustment, N' is an initial value, and g _ Handover _ Success _ Flg is a last switching Success flag value.
In step a), the rssi value is an average value of all rssi values in a handover decision period.
The present invention also provides a multi-network mode communication device, comprising: the network switching system comprises a network mode measuring module, a network mode switching judging module and a network mode switching executing module, and is characterized by further comprising a switching time period setting and adjusting module and a network mode switching threshold adjusting module;
the network mode measurement module is used for setting a measurement period and an initial value RSSI of a network mode switching thresholdIniPerforming cross-network mode measurement in a measurement period to obtain a received signal strength indicating value in other network modes except the network mode in which the device is located;
the switching judgment period setting module is used for setting a switching judgment period;
the module for adjusting the switching threshold of the network mode is used for counting the residence probability D that the system is respectively in each network mode in a plurality of latest measurement periods, setting a weight factor P representing the preferential selection degree of different network modes, and adjusting the RSSI of the switching threshold of the network mode according to the residence probability D and the weight factor PGate。
The network mode switching judging module judges whether the received signal strength indicated value is larger than the network mode switching threshold RSSI or not in the switching judging periodGate(ii) a If yes, the network mode switching execution module is informed to execute the switching operation.
The network mode switching execution module of the device further comprises a switching flag value g _ Handover _ Success _ Flg used for updating and recording the Success of the switching operation.
The device further comprises a switching judgment period adjusting module used for adjusting the switching judgment period according to the switching flag value g _ Handover _ Success _ Flg.
The network mode switching judging module of the device is further used for determining the optimal switching time point in the switching judging period.
It can be seen from the above that, the multi-network mode switching method and the communication device thereof provided by the present invention separate the measurement period from the switching determination period, and the device adjusts the switching determination period according to the network change condition, thereby increasing the response speed to the network change, better adapting to the network condition change, and improving the system switching performance according to the network change condition. If the network mode switching optimal time point is adjusted according to the latest switching success condition, the influence of false signals on the device is greatly reduced, the misjudgment probability is reduced, and the performance of the original service is improved; and counting the network mode residence probability in the recent period of time, wherein the network mode residence probability is used as an adjustment quantity of a network mode switching threshold, and the stability of network residence and service is improved. The invention dynamically adjusts the switching period based on the network change condition and judges whether to switch by adopting the statistic value of the RSSI signal in the switching period, thereby greatly reducing the influence of the false signal on the device, reducing the possibility of misjudgment and improving the QoS of the service.
In addition, the invention adopts a dynamic switching strategy, dynamically and comprehensively adjusts the network mode switching threshold value according to the residence probability and/or the network priority factor in different network modes, greatly solves the problems of network ping-pong switching and unbalanced network development in 2G and 3G staggered coverage areas, improves the stability of network residence and service, reduces power consumption and improves the standby performance of the multi-network mode communication device. Different weight factors are set for the 2G network and the 3G network respectively, so that the selection flexibility of operators, mobile phone manufacturers and users is improved, and the 3G network and the service are more favorable for rapid, stable and continuous development.
Drawings
Fig. 1 is a block diagram of a dual-mode communication device in the prior art;
FIG. 2 is a block diagram of a dual-mode communication device according to an embodiment of the present invention;
fig. 3 is a flowchart of a switching method of a dual-mode communication device according to an embodiment of the invention.
Detailed Description
The invention realizes the timely reflection of the network by shortening the measurement period, records the switching result of the previous network mode in the network mode switching process, and determines the switching period according to the switching result of the previous network mode of the non-working state network mode so as to realize flexible period measurement and obtain better switching performance. In addition, the residence probability of the network mode in the non-working state is further counted, and when the optimal switching time point arrives at the end of the switching period, the switching strategy for each switching is further dynamically adjusted according to the prior residence probability of the network mode and the network optimization degree, so that various problems caused by the fixed switching strategy in the prior art are avoided.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 2, a system block diagram of a dual-mode communication device of the present invention is shown, and the dual-mode communication device includes a 2G network mode module 202, a 3G network mode module 203, a network mode switching determination module 206, and a network mode switching execution module 207, and the device further includes a switching time period setting and adjusting module 204 and a network mode switching threshold adjusting module 205, where the 2G network mode module 202 specifically includes a GSM service module 2021 and a TD-SCDMA measurement module 2022, and the 3G network mode module 203 includes a TD-SCDMA service module 2031 and a GSM measurement module 2032. The air interface signal 201 is a signal received by the dual-mode communication apparatus during operation.
In the 2G network mode module 202, the GSM service module 2021 is used to implement GSM service; the TD-SCDMA measurement module 2022 is configured to perform cross-network mode measurement when receiving a measurement command sent by the GSM service module 2021, to obtain a received signal strength indication value of a received signal in the TD-SCDMA network mode, count all RSSI values measured in a switching determination period, and calculate an average value.
In the 3G network mode module 203, the TD-SCDMA service module 2031 is configured to implement TD-SCDMA service; the GSM measurement module 2032 is configured to perform cross-network mode measurement when receiving the measurement command from the TD-SCDMA service module 2031, to obtain RSSI values of received signals in the GSM network mode, count all RSSI values measured in a handover determination period, and calculate an average value.
The set and adjust switching determination period module 204 is configured to set a switching determination period, and adjust the switching determination period according to the switching success flag provided by the network mode switching execution module 207.
The module 205 for adjusting the network mode switching threshold is used to count the residence probability D of the dual-mode communication device in GSM and TD-SCDMA network modes during several measurement periodsGAnd DT(ii) a Setting two weight factors PGAnd PT，PGIndicating a degree of preference, P, for a GSM networkTIndicating a degree of preference for the TD-SCDMA network; and adjusting the network mode switching threshold according to the counted residence probability and the weight factor.
The network mode switching determining module 206 is configured to determine an optimal switching time point in a switching determining period, determine whether to perform switching according to the measured RSSI value of the network mode and the adjusted network mode switching threshold, and send a signal to notify the network mode switching performing module 207 of performing network mode switching when determining to perform switching.
The network mode switching execution module 207 is configured to receive the switching execution signal sent by the network mode switching determination module 206 to execute the switching operation, and in addition, the module is further configured to record whether the current switching operation is successful by setting a network mode switching success flag.
The specific implementation steps of the network mode switching method in the present invention are shown in fig. 3:
The cross-network mode measurement period is specifically a period when the dual-mode communication device operating in one network mode measures another network mode,measurement period T for shortmUsually, T is setmFor 5 minutes.
In order to adapt to different network distribution conditions, the switching judgment period TaSetting according to a formula:
Ta＝N*T m ①
wherein N is a natural number, and 1. ltoreq. N.ltoreq.Nmax，NmaxIs the value of N corresponding to the maximum switching period, e.g. Nmax20. When the system starts to operate, setting the initial value of N as NiniWith a size of [ Nmax/2]I.e. to Nmax/2 rounding, measuring the index value MindexIs 0.
In a measuring period TmIn the method, the dual-mode communication device receives a command for measuring another network mode, receives a signal of the network mode to be measured on an idle time slot, measures the received signal strength RSSI of the signal and stores the RSSI value, as described in formula (ii):
RSSI[Mindex]＝RSSICrt ②
wherein the RSSICrtAnd obtaining the RSSI value sequence corresponding to each measuring frequency point in the measuring process. The measurement command is automatically initiated by the dual-mode communication device and an appropriate idle time slot is selected to measure another network mode. The idle time slot is specifically a time slot in which no service is arranged in a GSM or TD-SCDMA data frame structure. For example, there are 8 timeslots in a GSM data frame, each uplink and downlink service occupies one timeslot, and there are 6 timeslots where no service is scheduled, which are idle timeslots in GSM.
In steps 303 and 304, an optimal time point for network mode switching is determined.
Measuring the index value M after one cross-network mode measurement is finishedindexIn the form of plus 1And increasing the number of the measurement periods, and judging whether the optimal time point of the network mode switching exists in the current measurement period.
In particular, if the index value M is measuredindexIf N is equal to N, the measurement period has the optimal time point for network mode switching, and step 305 is entered; otherwise, there is no optimal time point for switching network mode in the measurement period, and the procedure returns to step 302 directly.
305, counting the RSSI value in the switching judgment period by adopting an averaging method, and measuring an index value MindexAnd (6) clearing.
I in the formula represents the number of the measured frequency points, for example, if there are 10 measurement frequency points, the value range of i is [1, 10 ].
The Handover Success flag g _ Handover _ Success _ Flg is used to record whether the Handover from the GSM network mode to the TD-SCDMA network mode is successful or whether the Handover from the TD-SCDMA network mode to the GSM network mode is successful. If the switch is successful, setting the flag value to 1; otherwise, the flag value is set to-1. In addition, this flag is set to 0 in the initial state. As shown in equation 4:
N＝N′-g_Handover_Success_Flg ⑤
Ta＝N*Tm ⑥
in the formula (v), N 'is the value after the last adjustment, and if the adjustment is the first adjustment, N' is the initial value. g _ Handover _ Success _ Flg is a last switching Success flag value, and if the current network mode is switched to the initial network mode, the switching Success flag value is an initial value of 0. According to the switching result, combining the formula (v) to regulate N value, and adopting regulated N value to update next switching judgement period, as shown in formula (c), it must be noted that the value of N must meet the value range (1, N) approved by systemmax]Within.
DG＝CG/M ⑦
DT＝CT/M ⑧
Wherein, CGDenotes the number of times the system has been in GSM in the last M measurement periods, and CTThe number of times that the system is in the TD-SCDMA network mode in the latest M measurement periods is shown, and M is larger than or equal to N.
PG+PT＝1 ⑨
since the network coverage and services of 3G communication are still in the development stage at present, operators and manufacturers can set PG＜PTManner of (2), to preferentially select use 3G network, further 3G service expansion, Man Machine Interface (MMI)&Machine Interface) the user prioritizes the two alternative networks.
RSSIGate＝RSSIIni+(0.5-Di)*R1+(0.5-Pi)*R2 ⑩
Wherein i is selectable, T or G, R can be selected1，R2The two preset adjustment values are within the range of 5-10 dBm and RSSIIniIs a preset initial value of the network mode switching threshold. The polynomial to the right of the equation # indicates that the switching threshold value varies with previous residency and weighting factors and is within the range approved by the system.
In steps 311 and 312, the RSSI average value obtained by measurement and the RSSI switching threshold are measured in the switching judgment periodGateComparing, and determining whether to trigger the network mode switching execution module to execute the switching operation: if RSSI > RSSIGateIf yes, go to step 312, execute the network mode switching operation, and set the switch success flag to 1; otherwise, return to step 302 and set the switch success flag to-1.
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 invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (14)
1. A method of multi-network mode switching, comprising the steps of:
a) presetting a measurement period TmPerforming cross-network mode measurement in a measurement period to obtain a received signal strength indicating value in other network modes except the network mode;
b) counting the residence probability D of the system in each network mode in a plurality of recent measurement periods respectively, and setting a weight factor P representing the preferential selection degree of different network modes;
c) according to staying inKeeping the probability D and the weight factor P, and adjusting the network mode switching threshold RSSIGate；
d) Setting a switching determination period TaJudging whether the received signal strength indicated value is larger than the network mode switching threshold RSSI or not in the switching judging periodGate(ii) a If yes, switching is executed; wherein,
the set switching determination period TaFurther comprising determining an optimal switching time point within the switching decision period.
2. The method according to claim 1, wherein the residence probability D is counted in step b) according to the following formula:
DG＝CG/M，DT＝CT/M
in the formula, DGRepresenting the probability of residence of the system in the first network mode, DTRepresenting the probability of residence of the system in the second network mode, CGRepresenting the number of times the system is in the first network mode during M measurement periods, CTRepresenting the number of times the system is in the second network mode for M measurement periods, M being a natural number.
3. The method of claim 1, wherein the network mode switching threshold RSSI in step c) is adjusted according to the following formulaGate：
RSSIGate＝RSSIIni+(0.5-D)*R1+(0.5-P)*R2
In the formula, R1，R2In order to adjust the constant, the value range is between 5 dBm and 10dBm, and the RSSIIniIs the network mode switching threshold initial value.
4. The method of claim 1, wherein the weight factor for the preference level of the first network mode is represented as PGThe weight factor for the degree of preference for the second network mode is denoted as PTAnd is and
PG+PT＝1。
5. the method of claim 1, wherein the weight factor for the preference level of the first network mode is represented as PGThe weight factor for the degree of preference for the second network mode is denoted as PTAnd is and
PG＝PT＝1。
6. the method according to claim 1, wherein the setting of the switching determination period T in step d) is performed in real timeaSee the formula:
Ta＝N*Tm
in the formula, N is a natural number, and N is more than or equal to 1 and less than or equal to Nmax，NmaxThe method is the longest switching time that the system can endure, and the initial value of N is set to be N when the system starts to operateiniSize is to NmaxThe rounded value on/2.
7. The method of claim 6, wherein the determining an optimal switching time point within the switching decision period comprises:
presetting a measurement index value MindexIs 0, and measures the index value M after each cross-network mode measurement is finishedindexIncrement in a mode of adding 1, and measuring the index value M in one measuring periodindexWhen N, there is an optimal time point for switching network mode in the measurement period.
8. The method as claimed in claim 1, wherein step d) is followed by further recording a handoff flag value g _ Handover _ Success _ Flg indicating a handoff result, and adjusting a handoff determination period according to the handoff flag value.
9. The method of claim 8, wherein the Handover flag value g _ Handover _ Success _ Flg comprises:
a switching mark value g _ GSM2TDD _ Handover _ Success _ Flg representing a switching result from the first network mode to the second network mode and a switching mark value g _ TDD2GSM _ Handover _ Success _ Flg representing a switching result from the second network mode to the first network mode; if the first network mode is successfully switched to the second network mode, g _ GSM2TDD _ Handover _ Success _ Flg is 1, and if the first network mode is failed, g _ GSM2TDD _ Handover _ Success _ Flg is-1; if the second network mode is successfully switched to the first network mode, g _ TDD2GSM _ Handover _ Success _ Flg is 1, and if the second network mode is failed, g _ TDD2GSM _ Handover _ Success _ Flg is-1; if the network mode is switched to the initial network mode, the switch flag value is 0.
10. The method of claim 8, wherein the adjusting the handover decision period according to the handover flag value is performed according to the following formula:
N＝N′-g_Handover_Success_Flg
in the formula, N 'is a value after the last switching judgment period is adjusted, if the adjustment is the first adjustment, N' is an initial value, and g _ Handover _ Success _ Flg is a last switching Success flag value.
11. The method of claim 1 wherein the RSSI value in step a) is an average of all RSSI values in a handoff decision period.
12. A multi-network mode communication device, comprising: the network switching system comprises a network mode measuring module, a network mode switching judging module and a network mode switching executing module, and is characterized by further comprising a switching judging time period setting and adjusting module and a network mode switching threshold adjusting module;
the network mode measurement module is used for setting a measurement period and an initial value RSSI of a network mode switching thresholdIniPerforming cross-network mode measurement in a measurement period to obtain received signal strength index of the device in other network mode except the network modeIndicating the value;
the switching judgment time period setting and adjusting module is used for setting a switching judgment period;
the module for adjusting the switching threshold of the network mode is used for counting the residence probability D that the system is respectively in each network mode in a plurality of latest measurement periods, setting a weight factor P representing the preferential selection degree of different network modes, and adjusting the RSSI of the switching threshold of the network mode according to the residence probability D and the weight factor PGate；
The network mode switching judging module judges whether the received signal strength indicated value is larger than the network mode switching threshold RSSI or not in the switching judging periodGate(ii) a If yes, informing a network mode switching execution module to execute switching operation;
the network mode switching judgment module is further used for determining the optimal switching time point in the switching judgment period.
13. The apparatus according to claim 12, wherein the network mode Handover performing module further updates a Handover flag value g _ Handover _ Success _ Flg for recording the Success of the Handover operation.
14. The apparatus of claim 13, wherein the means for setting and adjusting the Handover decision time period is further configured to adjust the Handover decision time period according to a Handover flag value g _ Handover _ Success _ Flg.
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| CN104427593B (en) * | 2013-08-26 | 2018-01-23 | 联想(北京)有限公司 | Communication means and device |
| CN104320817B (en) * | 2014-10-21 | 2018-01-05 | 中国联合网络通信集团有限公司 | A kind of switching method based on multi-mode networks, base station and user equipment |
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