CN102497659A - Method and system for network selection under dual-network coverage, and dual-mode terminal - Google Patents
Method and system for network selection under dual-network coverage, and dual-mode terminal Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a system for network selection under dual-network coverage, and a dual-mode terminal. The method comprises the following steps that: the dual-mode terminal searches for a wireless local area network (WLAN) signal, and judges whether the intensity of the found WLAN signal reaches a preset intensity threshold value or not; the dual-mode terminal accesses a WLAN in response to that the intensity of the WLAN signal reaches the preset intensity threshold value, and judges whether the intensity of the WLAN signal reaches the preset intensity threshold value or not on a cycle of the first preset time; the dual-mode terminal acquires a weight value based on a packet delay and a packet loss rate in response to that the intensity of the WLAN signal reaches the preset intensity threshold value, and judges whether the weight value is lower than a preset weight value threshold value or not; and the dual-mode terminal is switched from the WLAN to a mobile network in response to that the weight value is not lower than the preset weight value threshold value. By the embodiment of the invention, a wireless network to be accessed by the dual-mode terminal can be rationally selected under the dual-network coverage of the mobile network and the WLAN, the utilization rate of wireless network resources can be increased, and the quality of service of a wireless network service can be improved.
Description
Technical field
The present invention relates to the communication technology, network selecting method under especially a kind of two nets cover and system, dual-mode terminal.
Background technology
Mobile network and WLAN (Wireless Local Area Network, hereinafter to be referred as: WLAN) two kinds of wireless networks can be realized wireless data access.At present; Because WLAN is operated in 2.4G or 5.8G frequency range; (Access Point about tens meters to 100 meters scope, obviously is different among the mobile network single base station hundreds of rice to the service radius of several kms hereinafter to be referred as: coverage AP) to single access point.But for the mobile network, WLAN but can provide speed of surfing the Internet at a high speed, for example, support the speed of surfing the Internet of the highest 54Mb/s based on the WLAN of IEEE802.11g standard is theoretical, and the unit cost of surfing the net is lower.Compare with WLAN; Though the passable coverage of single base station is bigger among the mobile network, it provides the speed of wireless data relatively low, even the current 3G network that puts it into commercial operation; Its speed that wireless data is provided is also well below present WLAN, and the unit cost of surfing the net is higher.
Different characteristics based on above-mentioned two kinds of wireless networks; When operator builds the mobile network at cloth; Carrying out mobile network and WLAN simultaneously for the more zone of wireless data application covers; Through WLAN shunting mobile network's data traffic, reach the effect that reduces the mobile network data load, promotes the user radio application awareness.But; Because WLAN limited coverage area; And network operation stability is relatively poor with respect to the mobile network; Therefore can exist and how to carry out the problem that optimum wireless network is selected, thereby can make full use of the different advantages of two wireless networks, provide optimum the wireless Internet access to experience to the user to greatest extent two wireless networks while region covered.
For the problems referred to above, industry generally adopts following mode to select access to mobile network or WLAN at present:
The one, the user according to mobile network and WLAN having or not of covering, signal is strong and weak or individual preference is manually selected access to mobile network or WLAN on dual-mode terminal.In this mode; The wireless network of manually being selected to insert by user oneself needs user's active operation; But,, therefore be difficult to confirm the online better effects if of which kind of wireless network because a lot of user does not have professional knowledge; The wireless network that inserts can only be blindly selected, the different advantages of two wireless networks can't be made full use of;
The 2nd, under mobile network and the two net coverings of wlan network, force WLAN preferentially to select.Though this mode avoids the user manually to select wireless network; But, because its choice criteria of following is no matter whether the WLAN signal is better than mobile network signals; Dual-mode terminal all preferably inserts WLAN; Like this, can cause the signal between the congested and different user of wlan network to disturb, be superior to WLAN and do not have the user to select to use mobile network's situation and this moment possibly occur mobile network's wireless Internet access effect.Therefore, the reasonable utilization of Internet resources still is that user's perception does not all obtain optimum realization.
Select the deficiency of access to mobile network or WLAN existence for fear of above-mentioned dual mode; Proposed following automatic network selection method in the prior art, make dual-mode terminal automatic network selection under mobile network and the two net coverings of WLAN: the intensity to the WLAN signal is judged; If the WLAN signal more by force then preferred WLAN; Otherwise, select the mobile network automatically.
In realizing process of the present invention, the inventor finds that there is following problem at least in the automatic network selection method of above-mentioned prior art:
For wireless network, owing to have air interference between the different user, therefore, the intensity of wireless signal is by force might not access rate high, that is to say, and the wireless network that user selection signal is stronger, it uses perception to get well.Therefore; Only there is certain contingency in prior art according to the wireless network that factor of power of wireless signal is selected to insert; Can't make full use of two kinds of wireless network resource; And possibly cause the signal between the congested and different user of wlan network to disturb, and influenced the normal use of user to wireless network traffic, reduced the service quality of wireless network traffic.
Summary of the invention
Embodiment of the invention technical problem to be solved is: network selecting method and system, the dual-mode terminal of a kind of two net under covering is provided; Wireless network so that choose reasonable dual-mode terminal under mobile network and the two net coverings of wlan network inserts improves the utilance of wireless network resource and the service quality of wireless network traffic.
Network selecting method under a kind of two nets that the embodiment of the invention provides cover comprises:
Dual-mode terminal search WLAN WLAN signal, and judge whether the WLAN signal strength signal intensity that searches reaches the preset strength threshold value;
Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal inserts WLAN, and is the cycle with first Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, dual-mode terminal switches to the mobile network by WLAN;
Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal access to mobile network or switch to the mobile network by WLAN, and be the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal switches to WLAN by the mobile network, and carrying out said then is the cycle with first Preset Time, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value.
A kind of dual-mode terminal that the embodiment of the invention provides comprises:
Detecting unit is used to search for the WLAN signal, and measures the WLAN signal strength signal intensity;
Control unit is used to judge whether the WLAN signal strength signal intensity that detecting unit searches reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, start the WLAN unit and insert WLAN, and the indication detecting unit is the cycle with first Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, the indication acquiring unit obtains the weighted value based on packet delay and packet loss index, and whether discerns this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, start mobile network's unit access to mobile network and close the WLAN unit, make dual-mode terminal switch to the mobile network by WLAN; Otherwise; Do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity; Start mobile network unit access to mobile network; Perhaps further close the WLAN unit and make dual-mode terminal switch to the mobile network, and the indication detecting unit is the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value by WLAN; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity; Starting the WLAN unit inserts WALN and closes the mobile network unit; Make dual-mode terminal switch to WLAN by the mobile network; Beginning to carry out said indication detecting unit then is the cycle with first Preset Time, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value;
Acquiring unit is used for the indication according to said control unit, obtains the weighted value based on packet delay and packet loss index;
The WLAN unit is used to insert WLAN;
The mobile network unit is used for access to mobile network.
Network selecting system under a kind of two nets that the embodiment of the invention provides cover comprises dual-mode terminal, WLAN, mobile network and authentication, authorizes accounting server AAA; Said WLAN comprises access point AP, Broadband Remote Access Server BRAS and networking protocol IP network; Said mobile network comprises mobile network's base station unit, base station controller unit and packet data processes node; Said dual-mode terminal is used to search for the WLAN signal, and judges whether the WLAN signal strength signal intensity that searches reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal inserts WLAN, and is the cycle with first Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, dual-mode terminal switches to the mobile network by WLAN; Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal access to mobile network or switch to the mobile network by WLAN, and be the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal switches to WLAN by the mobile network, and carrying out said then is the cycle with first Preset Time, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value.
For wireless network, owing to have air interference between the different user, the intensity of wireless signal is by force might not access rate high, that is to say, and the wireless network that user selection signal is stronger, it uses perception to get well.The two nets that provide based on the above embodiment of the present invention cover network selecting method down and system, dual-mode terminal, access WLAN when the WLAN signal strength signal intensity that searches at dual-mode terminal reaches the preset strength threshold value, and be the cycle with first Preset Time; Measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; When the WLAN signal strength signal intensity reaches the preset strength threshold value, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value, if this weighted value is not less than preset weighted value threshold value less than preset weighted value threshold value; Dual-mode terminal switches to the mobile network by WLAN; Otherwise less than preset weighted value threshold value, dual-mode terminal still is trapped among the WLAN as if this weighted value; Further according to access performance and the robustness of confirming WLAN based on the weighted value of packet delay and packet loss index; Thereby confirm whether two terminals of touching are continued to be trapped in WLAN or switched to the mobile network, compared with prior art, make that two terminals of touching are more objective to the selection of WLAN; So that make full use of two kinds of wireless network resource; Avoid causing the signal between the congested and different user of wlan network to disturb, effectively ensure the normal use of user, improve user's the online perception and the service quality of wireless network traffic wireless network traffic.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the embodiment of network selecting method under the two net coverings of the present invention;
Fig. 2 is the flow chart of another embodiment of network selecting method under the two net coverings of the present invention;
Fig. 3 is the structural representation of an embodiment of dual-mode terminal of the present invention;
Fig. 4 is the structural representation of the embodiment of network selecting system under the two net coverings of the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Fig. 1 is the flow chart of the embodiment of network selecting method under the two net coverings of the present invention.As shown in Figure 1, the network selecting method under the two nets of this embodiment cover comprises:
101, dual-mode terminal search WLAN signal, and judge whether the WLAN signal strength signal intensity that searches reaches the preset strength threshold value.Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 102 operation.Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 105 operation.
102, dual-mode terminal inserts WLAN.
103, dual-mode terminal is the cycle with first Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value.Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 104 operation.Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 106 operation.
104, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value.Be not less than preset weighted value threshold value in response to weighted value, carry out 105 operation.Otherwise, less than preset weighted value threshold value, do not carry out the flow of present embodiment in response to weighted value, dual-mode terminal continues to be trapped among the WLAN, carries out 103 operation.
105, the dual-mode terminal access to mobile network.Carry out 107 operation then.
106, dual-mode terminal switches to the mobile network by WLAN.
107, dual-mode terminal is the cycle with second Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value.Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 108 operation.Otherwise, do not carry out the flow of present embodiment, dual-mode terminal continues to be trapped among the mobile network, carries out 107 operation.
108, dual-mode terminal switches to WLAN by the mobile network, carries out 103 operation then.
Network selecting method under two nets that the above embodiment of the present invention provides cover; Insert WLAN when the WLAN signal strength signal intensity that searches at dual-mode terminal reaches the preset strength threshold value, and be the cycle, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value with first Preset Time; When the WLAN signal strength signal intensity reaches the preset strength threshold value; Obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value, if this weighted value is not less than preset weighted value threshold value, dual-mode terminal switches to the mobile network by WLAN; Otherwise; If this weighted value is less than preset weighted value threshold value, dual-mode terminal still is trapped among the WLAN, further according to access performance and the robustness of confirming WLAN based on the weighted value of packet delay and packet loss index; Thereby confirm whether two terminals of touching are continued to be trapped in WLAN or switched to the mobile network; Make that two terminals of touching are more objective to the selection of WLAN,, avoid causing the signal between the congested and different user of wlan network to disturb so that make full use of two kinds of wireless network resource; Effectively ensure the normal use of user, improve user's the online perception and the service quality of wireless network traffic wireless network traffic.
According to an example of the present invention and unrestricted, in the operation 103 of the above embodiment of the present invention, specifically can measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value through following mode:
In first Preset Time, measure the intensity of M WLAN signal, and the WLAN signal strength signal intensity that measures for M time is averaged.Wherein, M is the integer greater than 0; Relatively whether WLAN signal strength signal intensity first mean value that obtains of averaging reaches the preset strength threshold value.
Another example according to the present invention is and unrestricted, and the operation 104 of the above embodiment of the present invention specifically can realize through following mode:
Dual-mode terminal and auxiliary network selection server are through PING order test, network delay Timedelay when obtaining the WLAN wireless access and packet loss Packetloss.For example, dual-mode terminal sends the PING order through WLAN to auxiliary network selection server, and according to the feedback of auxiliary network selection server to the PING order, network delay Timedelay when obtaining the WLAN wireless access and packet loss Packetloss;
Dual-mode terminal obtains the weighted value based on packet delay and packet loss index through TH=λ 1* (Timedelay/Timedelaybased)+λ 2* (Packetloss/Packetlossbased).
Wherein, Timedelaybased is preset network delay reference value, and Packetlossbased is preset packet loss reference value, and λ 1 and λ 2 are weight coefficient, λ 1+ λ 2=1.Timedelaybased, Packetlossbased, λ 1 can choose according to practical application request with the value of λ 2.
According to another example of the present invention and unrestricted, in the operation 108 of the above embodiment of the present invention, specifically can measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value through following mode:
The intensity of measuring N time WLAN signal in second Preset Time, and the WLAN signal strength signal intensity that measures for N time averaged, wherein, N is the integer greater than 0;
Relatively whether WLAN signal strength signal intensity second mean value that obtains of averaging reaches the preset strength threshold value.
In an example of the present invention, the value of M and N can be set according to actual demand, and the value of M is greater than the value of N, can make in WLAN the ionization meter to the WLAN signal more accurate.The intensity of WLAN signal repeatedly measured average, can avoid because the incident that the unsteadiness of wireless network signal causes, guarantee the accuracy and stability of measurement result.
Fig. 2 is the flow chart of another embodiment of network selecting method under the two net coverings of the present invention.As shown in Figure 2, the network selecting method under the two nets of this embodiment cover comprises:
201, dual-mode terminal search WLAN signal, and judge whether the WLAN signal strength signal intensity that searches reaches the preset strength threshold value.Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 203 operation.Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 202 operation.
202, the dual-mode terminal access to mobile network.Carry out 208 operation then.
203, dual-mode terminal inserts WLAN.
204, dual-mode terminal is the cycle with first Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value.Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 205 operation.Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 207 operation.
205, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value.Be not less than preset weighted value threshold value in response to weighted value, carry out 206 operation.Otherwise, less than preset weighted value threshold value, do not carry out the flow of present embodiment in response to weighted value, dual-mode terminal continues to be trapped among the WLAN, carries out 204 operation.
The WLAN signal strength signal intensity reaches the preset strength threshold value; And based on the weighted value of packet delay and packet loss index during less than preset weighted value threshold value; And just continuation keeps the access of dual-mode terminal in WLAN; Can avoid because the WLAN signal is fine, but because the user is more interferes with each other the situation that user's dual-mode terminal when causing the network quality rapid drawdown still inserts wlan network and occur.
206, dual-mode terminal adopts random algorithm to determine whether to switch to the mobile network by WLAN.Switch to the mobile network in response to confirming by WLAN, carry out 207 operation.Otherwise, do not carry out the flow of present embodiment, dual-mode terminal continues to be trapped among the WLAN, carries out 204 operation.
When the WLAN signal is more weak, might not need all users' of access WLAN dual-mode terminal all to switch to the mobile network.This is because what influence that the user uses perception is network insertion speed, uses the user of this wireless network less at this moment if a certain wireless network signal is more weak, and the interference that then produces between the user is less, also possibly realize higher access rate.According to embodiments of the invention; When the WLAN signal is more weak, make weighted value more than or equal to preset weighted value threshold value, adopt random algorithm to confirm whether this dual-mode terminal switches to the mobile network network, can avoid current all wireless terminal with double mode all to switch to the mobile network and cause mobile network's bearing pressure; Make and automatically switch to the mobile network at the relatively poor part dual-mode terminal of current WLAN result of use; The part dual-mode terminal still is trapped in this WLAN, at this moment, because a part of dual-mode terminal is switched into the mobile network by WLAN; Reduce before the interference ratio among the WLAN; The dual-mode terminal that still is trapped among the WLAN can high-qualityly be got online without being tethered to a cable through WLAN, and user's use perception will promote, and the cut-in quality that switches the dual-mode terminal of going into the mobile network simultaneously also has lifting in various degree.
207, dual-mode terminal switches to the mobile network by WLAN.
208, in the mobile network, dual-mode terminal is the cycle with second Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value.Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, carry out 209 operation.Otherwise, do not carry out the flow of present embodiment, dual-mode terminal continues to be trapped among the mobile network, carries out 208 operation.
209, dual-mode terminal switches to WLAN by the mobile network, carries out 204 operation then.
According to an example of the present invention and unrestricted, embodiment shown in Figure 2 206 in, dual-mode terminal specifically can adopt random algorithm to determine whether to switch to the mobile network by WLAN through following mode:
Dual-mode terminal produces a random number between [int, R], for example, 0, R/4, R/2, and whether this random number that relatively produces greater than R/2, and wherein, int and R are not less than zero number, and R is for presetting fixed numbers;
Greater than R/2, dual-mode terminal is confirmed to switch to the mobile network by WLAN in response to this random number.
According to another example of the present invention and unrestricted; When dual-mode terminal is arranged in WLAN; The value of int can change and change along with the number of times that dual-mode terminal obtains weighted value; Therefore, dual-mode terminal can increase the once value of this int when each weighted value is not less than preset weighted value threshold value, the value of this int is increased gradually; After dual-mode terminal switches to the mobile network by WLAN, the value of int is reverted to initial value.
For example, if the initial value of int is 0, when dual-mode terminal is measured the weighted value value that gets access to for the first time more than or equal to preset weighted value threshold value in WLAN; The value of int is 0; As this moment dual-mode terminal confirm not switch to the mobile network through random algorithm, when then measuring the weighted value value that gets access to more than or equal to preset weighted value threshold value, it is R/4 that the value of int increases; And the like; Increasing for the third time is R/2, in case dual-mode terminal switches to the mobile network, then the value of int puts 0 again.Here the weighted value value that gets access to can be set under the operating environment of reality with the value of each int more than or equal to the number of times of preset weighted value threshold value and can change.
Fig. 3 is the structural representation of an embodiment of dual-mode terminal of the present invention.The dual-mode terminal of this embodiment can be used as the dual-mode terminal of above-mentioned each embodiment of the present invention, realizes the flow process of the network selecting method under the covering of above-mentioned each pair net of the present invention.As shown in Figure 3, it comprises detecting unit 301, control unit 302, acquiring unit 303, WLAN unit 304 and mobile network unit 305.
Wherein, detecting unit 301 is used to search for the WLAN signal, and measures the WLAN signal strength signal intensity.
Control unit 302 is used to judge whether the WLAN signal strength signal intensity that detecting unit 301 searches reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, start WLAN unit 304 and insert WLAN, and indication detecting unit 301 is the cycle with first Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, indication acquiring unit 303 obtains the weighted value based on packet delay and packet loss index, and whether discerns this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, start mobile network's unit 305 access to mobile network and close WLAN unit 304, make dual-mode terminal switch to the mobile network by WLAN; Otherwise; Do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity; Start mobile network unit 305 access to mobile network; Perhaps further close WLAN unit 304 and make dual-mode terminal switch to the mobile network, and indication detecting unit 301 is the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value by WLAN; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity; Starting WLAN unit 304 inserts WALN and closes mobile network unit 305; Make dual-mode terminal switch to WLAN by the mobile network; Beginning to carry out indication detecting unit 301 then is the cycle with first Preset Time, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value.
Acquiring unit 303 is used for the indication according to control unit 302, obtains the weighted value based on packet delay and packet loss index.
Exemplarily, acquiring unit 303 specifically can pass through WLAN unit 304, tests network delay Timedelay when obtaining the WLAN wireless access and packet loss Packetloss with auxiliary network selection server through the PING order; Obtain weighted value through TH=λ 1* (Timedelay/Timedelaybased)+λ 2* (Packetloss/Packetlossbased) based on packet delay and packet loss index.Wherein, Timedelaybased is preset network delay reference value, and Packetlossbased is preset packet loss reference value, and λ 1 and λ 2 are weight coefficient, λ 1+ λ 2=1.
The dual-mode terminal that the above embodiment of the present invention provides inserts WLAN when the WLAN signal strength signal intensity that searches reaches the preset strength threshold value, and is the cycle with first Preset Time; Measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value, when the WLAN signal strength signal intensity reaches the preset strength threshold value, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value; If this weighted value is not less than preset weighted value threshold value; Dual-mode terminal switches to the mobile network by WLAN, otherwise, if this weighted value is less than preset weighted value threshold value; Dual-mode terminal still is trapped among the WLAN; Further according to confirming access performance and the robustness of WLAN based on the weighted value of packet delay and packet loss index, thereby confirm whether two terminals of touching are continued to be trapped in WLAN or switched to the mobile network, feasible pair to touch terminals more objective to the selection of WLAN; So that make full use of two kinds of wireless network resource; Avoid causing the signal between the congested and different user of wlan network to disturb, effectively ensure the normal use of user, improve user's the online perception and the service quality of wireless network traffic wireless network traffic.
According to an example of the present invention and unrestricted; Corresponding with above-mentioned network selecting method embodiment, detecting unit 301 specifically can be measured the intensity of M WLAN signal in first Preset Time, and the WLAN signal strength signal intensity that measures for M time is averaged; Wherein, M is the integer greater than 0; Relatively whether WLAN signal strength signal intensity first mean value that obtains of averaging reaches the preset strength threshold value.In addition, detecting unit 301 specifically can be in second Preset Time intensity of measuring N time WLAN signal, and the WLAN signal strength signal intensity that measures for N time averaged.Wherein, N is the integer greater than 0; Relatively whether WLAN signal strength signal intensity second mean value that obtains of averaging reaches the preset strength threshold value.
An example according to the present invention is and unrestricted, and corresponding with above-mentioned network selecting method embodiment, control unit 302 also can be used for adopting random algorithm to determine whether to switch to the mobile network by WLAN; Switch to the mobile network in response to confirming by WLAN, start mobile network's unit 305 access to mobile network and close WLAN unit 304, make dual-mode terminal switch to the mobile network by WLAN.
Exemplarily, when control unit 302 adopts random algorithms to determine whether to switch to the mobile network by WLAN, specifically can between [int, R], produce a random number, and relatively this random number whether greater than R/2.Wherein, int and R are not less than zero number, and R is preset fixed numbers; , confirm to switch to the mobile network greater than R/2 in response to this random number by WLAN.
Alternatively, control unit 302 also is used in each weighted value and is not less than when presetting the weighted value threshold value, increases the value of int, makes the value of int increase gradually; After switching to the mobile network by WLAN, the value of int is reverted to initial value at dual-mode terminal.
Fig. 4 is the structural representation of the embodiment of network selecting system under the two net coverings of the present invention.The network selecting system of this embodiment can be used as the network selecting method flow process of above-mentioned each embodiment of the present invention.As shown in Figure 4, it comprise dual-mode terminal 1, WLAN2, mobile network 3 and authentication, authorize accounting server (Authentication, Authorization, Accounting, hereinafter to be referred as: AAA) 4.Wherein, WLAN2 comprises access point (Access Point; Hereinafter to be referred as: AP), Broadband Remote Access Server (Broadband Remote Access Server, hereinafter to be referred as: BRAS) (Internet Protocol is hereinafter to be referred as IP) network with networking protocol; Mobile network 3 comprises mobile network's base station unit, base station controller unit and packet data processes node.
Wherein, dual-mode terminal 1 is used to search for the WLAN signal, and judges whether the WLAN signal strength signal intensity that searches reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal 1 inserts WLAN2, and is the cycle with first Preset Time, and whether the WLAN signal strength signal intensity of measuring among the WLAN2 reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, dual-mode terminal 1 switches to mobile network 3 by WLAN2; Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal 1 access to mobile network 3 or switch to mobile network 3 by WLAN2, and be the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal 1 switches to WLAN2 by mobile network 3, and carrying out with first Preset Time then is the cycle, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value.
Exemplarily, this dual-mode terminal 1 specifically can adopt the dual-mode terminal structure of above-mentioned each embodiment shown in Figure 3 of the present invention to realize.
Network selecting system under two nets that the above embodiment of the present invention provides cover; Insert WLAN when the WLAN signal strength signal intensity that searches at dual-mode terminal reaches the preset strength threshold value, and be the cycle, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value with first Preset Time; When the WLAN signal strength signal intensity reaches the preset strength threshold value; Obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value, if this weighted value is not less than preset weighted value threshold value, dual-mode terminal switches to the mobile network by WLAN; Otherwise; If this weighted value is less than preset weighted value threshold value, dual-mode terminal still is trapped among the WLAN, further according to access performance and the robustness of confirming WLAN based on the weighted value of packet delay and packet loss index; Thereby confirm whether two terminals of touching are continued to be trapped in WLAN or switched to the mobile network; Make that two terminals of touching are more objective to the selection of WLAN,, avoid causing the signal between the congested and different user of wlan network to disturb so that make full use of two kinds of wireless network resource; Effectively ensure the normal use of user, improve user's the online perception and the service quality of wireless network traffic wireless network traffic.
Further exemplarily; Again referring to Fig. 4; Network selecting system under the two nets of the present invention cover can also comprise auxiliary network selection server 5; Be used to receive the PING order that dual-mode terminal 1 sends, and to the PING order that receives to dual-mode terminal 1 feedback response message, so that network delay Timedelay and the packet loss Packetloss of dual-mode terminal when obtaining the WLAN wireless access according to this response message.
For another example; In another example; Mobile network 3 is specially synchronous code division multiple access of time-division (Time Division-Synchronization Code Division Multiple Access; Hereinafter to be referred as: TD-SCDMA) (Wideband Code Division Multiple Access is hereinafter to be referred as WCDMA) network for network or WCDMA.Accordingly; Mobile network's base station unit is specially Node B (NodeB); The base station controller unit is specially wireless controller (Radio Network Controller; Hereinafter to be referred as: RNC), the packet data processes node is specially the packet radio service, and (General Packet Radio Service is hereinafter to be referred as GPRS) support node (Serving GPRS Support Node; Hereinafter to be referred as: SGSN) with the packet radio gateway (Gateway GPRS Support Node, hereinafter to be referred as: GGSN).Wherein, SGSN and GGSN can close be called GPRS Support Node (GPRS Support Node, hereinafter to be referred as: GSN), SGSN cooperates with GGSN, and (Packet Switch is hereinafter to be referred as PS) domain-functionalities nodal function to bear the packet switching of WCDMA core net jointly.
Each embodiment all adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that same or analogous part cross-references gets final product between each embodiment.For device and system embodiment, because it is similar basically with method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
The embodiment of the invention makes user's dual-mode terminal can adopt rational more automatic network selection mechanism to carry out the selection and the access of optimum wireless network, is promoting the utilization ratio that promotes wireless network resource when the user radio network uses perception.
Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.A lot of modifications and variation are obvious for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (19)
1. the network selecting method under two nets cover is characterized in that, comprising:
Dual-mode terminal search WLAN WLAN signal, and judge whether the WLAN signal strength signal intensity that searches reaches the preset strength threshold value;
Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal inserts WLAN, and is the cycle with first Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, dual-mode terminal switches to the mobile network by WLAN;
Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal access to mobile network or switch to the mobile network by WLAN, and be the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal switches to WLAN by the mobile network, and carrying out said then is the cycle with first Preset Time, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value.
2. method according to claim 1 is characterized in that, is the cycle with first Preset Time, and whether measurement WLAN signal strength signal intensity reaches the preset strength threshold value comprises:
In first Preset Time, measure the intensity of M WLAN signal, and the WLAN signal strength signal intensity that measures for M time is averaged, wherein, M is the integer greater than 0;
Relatively whether WLAN signal strength signal intensity first mean value that obtains of averaging reaches the preset strength threshold value.
3. whether method according to claim 1 is characterized in that, obtain based on the weighted value of packet delay and packet loss index and discern this weighted value to comprise less than preset weighted value threshold value:
Dual-mode terminal and auxiliary network selection server are through PING order test, network delay Timedelay when obtaining the WLAN wireless access and packet loss Packetloss;
Dual-mode terminal obtains the weighted value based on packet delay and packet loss index through TH=λ 1* (Timedelay/Timedelaybased)+λ 2* (Packetloss/Packetlossbased);
Wherein, Timedelaybased is preset network delay reference value, and Packetlossbased is preset packet loss reference value, and λ 1 and λ 2 are weight coefficient, λ 1+ λ 2=1.
4. method according to claim 1 is characterized in that, is the cycle with second Preset Time, and whether measurement WLAN signal strength signal intensity reaches the preset strength threshold value comprises:
The intensity of measuring N time WLAN signal in second Preset Time, and the WLAN signal strength signal intensity that measures for N time averaged, wherein, N is the integer greater than 0;
Relatively whether WLAN signal strength signal intensity second mean value that obtains of averaging reaches the preset strength threshold value.
5. according to any described method of claim 1 to 4, it is characterized in that dual-mode terminal switches to the mobile network by WLAN and comprises:
Said dual-mode terminal adopts random algorithm to determine whether to switch to the mobile network by WLAN;
Switch to the mobile network in response to confirming by WLAN, dual-mode terminal switches to the mobile network by WLAN.
6. method according to claim 5 is characterized in that, said dual-mode terminal adopts random algorithm to determine whether that switching to the mobile network by WLAN comprises:
Dual-mode terminal produces a random number between [int, R], and relatively whether this random number is greater than R/2, and wherein, int and R are not less than zero number, and R is preset fixed numbers;
, confirm to switch to the mobile network greater than R/2 in response to this random number by WLAN.
7. method according to claim 6 is characterized in that, when dual-mode terminal is not less than preset weighted value threshold value in weighted value, increases the value of int; After dual-mode terminal switches to the mobile network by WLAN, the value of int is reverted to initial value.
8. a dual-mode terminal is characterized in that, comprising:
Detecting unit is used to search for the WLAN signal, and measures the WLAN signal strength signal intensity;
Control unit is used to judge whether the WLAN signal strength signal intensity that detecting unit searches reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, start the WLAN unit and insert WLAN, and the indication detecting unit is the cycle with first Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, the indication acquiring unit obtains the weighted value based on packet delay and packet loss index, and whether discerns this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, start mobile network's unit access to mobile network and close the WLAN unit, make dual-mode terminal switch to the mobile network by WLAN; Otherwise; Do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity; Start mobile network unit access to mobile network; Perhaps further close the WLAN unit and make dual-mode terminal switch to the mobile network, and the indication detecting unit is the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value by WLAN; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity; Starting the WLAN unit inserts WALN and closes the mobile network unit; Make dual-mode terminal switch to WLAN by the mobile network; Beginning to carry out said indication detecting unit then is the cycle with first Preset Time, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value;
Acquiring unit is used for the indication according to said control unit, obtains the weighted value based on packet delay and packet loss index;
The WLAN unit is used to insert WLAN;
The mobile network unit is used for access to mobile network.
9. dual-mode terminal according to claim 8; It is characterized in that said detecting unit is the cycle with first Preset Time, when whether measurement WLAN signal strength signal intensity reaches the preset strength threshold value; Specifically in first Preset Time, measure the intensity of M WLAN signal; And the WLAN signal strength signal intensity that measures for M time averaged, wherein, M is the integer greater than 0; Relatively whether WLAN signal strength signal intensity first mean value that obtains of averaging reaches the preset strength threshold value.
10. dual-mode terminal according to claim 8; It is characterized in that; Said acquiring unit is tested network delay Timedelay when obtaining WLAN wireless access and packet loss Packetloss with auxiliary network selection server through the PING order specifically through said WLAN unit; Obtain weighted value through TH=λ 1* (Timedelay/Timedelaybased)+λ 2* (Packetloss/Packetlossbased) based on packet delay and packet loss index;
Wherein, Timedelaybased is preset network delay reference value, and Packetlossbased is preset packet loss reference value, and λ 1 and λ 2 are weight coefficient, λ 1+ λ 2=1.
11. dual-mode terminal according to claim 8; It is characterized in that said detecting unit is the cycle with second Preset Time, when whether measurement WLAN signal strength signal intensity reaches the preset strength threshold value; The concrete intensity of measuring N time WLAN signal in second Preset Time; And the WLAN signal strength signal intensity that measures for N time averaged, wherein, N is the integer greater than 0; Relatively whether WLAN signal strength signal intensity second mean value that obtains of averaging reaches the preset strength threshold value.
12. to 11 any described dual-mode terminals, it is characterized in that according to Claim 8 said control unit also is used to adopt random algorithm to determine whether to switch to the mobile network by WLAN; Switch to the mobile network in response to confirming by WLAN, start mobile network's unit access to mobile network and close the WLAN unit, make dual-mode terminal switch to the mobile network by WLAN.
13. dual-mode terminal according to claim 12 is characterized in that, when said control unit adopts random algorithm to determine whether to switch to the mobile network by WLAN; Specifically at [int; R] between produce a random number, and relatively this random number whether greater than R/2, wherein; Int and R are not less than zero number, and R is preset fixed numbers; , confirm to switch to the mobile network greater than R/2 in response to this random number by WLAN.
14. dual-mode terminal according to claim 13 is characterized in that, said control unit also is used for when weighted value is not less than preset weighted value threshold value, increasing the value of int; And after said dual-mode terminal switches to the mobile network by WLAN, the value of int is reverted to initial value.
15. the network selecting system under two nets cover comprises dual-mode terminal, WLAN, mobile network and authentication, authorizes accounting server AAA; Said WLAN comprises access point AP, Broadband Remote Access Server BRAS and networking protocol IP network; Said mobile network comprises mobile network's base station unit, base station controller unit and packet data processes node; It is characterized in that said dual-mode terminal is used to search for the WLAN signal, and judge whether the WLAN signal strength signal intensity that searches reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal inserts WLAN, and is the cycle with first Preset Time, measures the WLAN signal strength signal intensity and whether reaches the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, obtain based on the weighted value of packet delay and packet loss index and whether discern this weighted value less than preset weighted value threshold value; Be not less than preset weighted value threshold value in response to weighted value, dual-mode terminal switches to the mobile network by WLAN; Otherwise, do not reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal access to mobile network or switch to the mobile network by WLAN, and be the cycle with second Preset Time, measure the WLAN signal strength signal intensity and whether reach the preset strength threshold value; Reach the preset strength threshold value in response to the WLAN signal strength signal intensity, dual-mode terminal switches to WLAN by the mobile network, and carrying out said then is the cycle with first Preset Time, measures the operation whether the WLAN signal strength signal intensity reaches the preset strength threshold value.
16. system according to claim 15 is characterized in that, said dual-mode terminal is specially any described dual-mode terminal of claim 8 to 14.
17. system according to claim 16 is characterized in that, also comprises:
Auxiliary network selection server; Be used to receive the PING order that dual-mode terminal sends; And to the PING that receives order to said dual-mode terminal feedback response message, so that network delay Timedelay and the packet loss Packetloss of said dual-mode terminal when obtaining the WLAN wireless access according to this response message.
18. system according to claim 17 is characterized in that, said mobile network is global system for mobile communications GSM network or code division multiple access CDMA2000 network;
Said mobile network's base station unit is specially base transceiver station BTS;
Said base station controller unit is specially base station controller BSC;
Said packet data processes node is specially group data service node PDSN.
19. system according to claim 17 is characterized in that, said mobile network is synchronous code division multiple access TD-SCDMA network or a WCDMA WCDMA network of time-division;
Said mobile network's base station unit is specially Node B NodeB;
Said base station controller unit is specially wireless controller RNC;
Said packet data processes node is specially packet radio Serving GPRS Support Node SGSN and packet radio gateway GGSN.
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