CN102497658B - Multimode switching method for heterogeneous network - Google Patents

Multimode switching method for heterogeneous network Download PDF

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CN102497658B
CN102497658B CN201110434828.4A CN201110434828A CN102497658B CN 102497658 B CN102497658 B CN 102497658B CN 201110434828 A CN201110434828 A CN 201110434828A CN 102497658 B CN102497658 B CN 102497658B
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real
mobile terminal
time
packet loss
wifi
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CN102497658A (en
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于秦
李定伟
蒋体钢
赵一甲
曹洁
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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Abstract

The invention discloses a multimode switching method for a heterogeneous network. The method mainly comprises the following steps of: determining a real-time service and a non-real-time service in each communication mode in the heterogeneous network, and determining priority among a plurality of communication modes in the heterogeneous network; setting respective packet loss threshold values of the real-time service and the non-real-time service in each communication mode; acquiring respective packet losses of the real-time service and the non-real-time service in each communication mode; and comparing the obtained packet losses and corresponding threshold values according to a sequence ranging from high propriety to low priority, and finding a current most proper access network for switching. Due to the adoption of the method, the current communication performance is sensed through a communication service, an optimal communication mode can be selected through a decision, a network resource can be effectively used by a user, and interrupt communication capability resistance is enhanced.

Description

A kind of multi-mode switching method of heterogeneous network
Technical field
The invention belongs to network communications technology field, be specifically related to the multi-mode switching method of heterogeneous network.
Background technology
Due to developing rapidly of 3G and wifi, a lot of places are all covered by 3G and wifi network simultaneously, and corresponding, most mobile terminal all has 3G and wifi module simultaneously.In the time that a mobile terminal is in the region that 3G and wifi cover simultaneously, can forever preferentially select wifi network according to conventional method, this is because the bandwidth of wifi is far superior to the bandwidth of 3G in the ordinary course of things, communication quality is better than 3G, but under special circumstances, the communication quality of wifi may drop to very low, even can be lower than the communication quality in 3G situation, and at this moment mobile terminal still can be selected wifi network.For this situation, in order to make user can better use current Internet resources, how between 3G and wifi, to do the most appropriate selection, become a problem in the urgent need to address.
Present stage, the research of the switching for mobile terminal in 3G and wifi network's coverage area is few, main research is concentrated both ways, a kind of is that terminal is by measuring the signal strength signal intensity of the broadcast packet in Radio Access Network, determine the channel condition of corresponding network, then select to switch according to the variation of signal strength signal intensity; Another is the current load condition by contrasting each Radio Access Network, in the time that the network congestion degree using becomes serious, just switches.These two kinds of determination strategy have certain one-sidedness and the shortcoming of underaction, and they have only considered the access situation of terminal to access point, have ignored the network condition of access point to service server.When access point is to the network congestion of service server, and the signal strength signal intensity of access point self and load be not while changing, and these two kinds of strategies can not perceive the real change situation of communication network, and mobile terminal just cannot be made switching judging timely.
Summary of the invention
The object of the invention is, in order to solve the above-mentioned defect that existing method exists while switching for mobile terminal in heterogeneous network, to have proposed a kind of multi-mode switching method of heterogeneous network.
Technical scheme of the present invention is: a kind of multi-mode switching method of heterogeneous network, specifically comprises the steps:
Step 1, determines real time business and non-real-time service under every kind of communication pattern in heterogeneous network, and described real time business is the business that needs real time data mutual, and described non-real-time service is the business of access without real time reaction; And the priority between real time business and non-real-time service under plurality of communication schemes in definite heterogeneous network;
Step 2, sets real time business and non-real-time service packet loss threshold value separately under every kind of communication pattern;
Step 3, obtains real time business and non-real-time service packet loss separately under every kind of communication pattern;
Step 4, according to priority order from high to low, the contrast of the packet loss that step 3 the is obtained threshold value corresponding with it, finds the network of current the most applicable access to switch.
Beneficial effect of the present invention: method of the present invention is based on service-aware, the packet loss of access service can reflect the quality of user communication quality, the larger explanation network quality of packet loss is poorer, therefore the present invention is using the packet loss of access service as switching foundation, obtain packet loss by collection, clear, comprehensively know that terminal arrives the network quality of the whole communication process of service server, make suitable switching judging decision-making, reach the object of anti-communication disruption.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the inventive method.
Fig. 2 is the network topological diagram that 3G/wifi coexists.
Fig. 3 is that originate mode is the bimodulus switching flow of wifi.
Fig. 4 is that originate mode is the bimodulus switching flow of 3G.
Fig. 5 is the network topological diagram that 3G, WiMAX, wifi coexist.
Fig. 6 is that originate mode is the three mould switching flows of wifi.
Fig. 7 is that originate mode is the three mould switching flows of WiMAX.
Fig. 8 is that originate mode is the three mould switching flows of 3G.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further:
The multi-mode switching method of heterogeneous network of the present invention, schematic flow sheet as shown in Figure 1, specifically comprises the steps:
Step 1, determines real time business and non-real-time service under every kind of communication pattern in heterogeneous network, and described real time business is the business that needs real time data mutual, and described non-real-time service is the business of access without real time reaction; And the priority between real time business and non-real-time service under plurality of communication schemes in definite heterogeneous network.Generally speaking, the priority of real time business is greater than the priority of non-real-time service, then in conjunction with the concrete condition of communication pattern in heterogeneous network, and then can determine in heterogeneous network the priority between real time business and non-real-time service under plurality of communication schemes.
Step 2, sets real time business under every kind of communication pattern and the packet loss threshold value of non-real-time service.In order to facilitate the comparison between plurality of communication schemes, the real time business under every kind of communication pattern is all identical with the threshold value of non-real-time service.Test by reality, packet loss is larger on the communication quality impact of real time business, general packet loss is 5% time, communication quality can be accepted, but in the time that packet loss arrives 10%, communication quality cannot make us accepting, so packet loss threshold value that can real time business is set to a median 8% between them.For non-real-time service, stronger to the tolerance of packet loss, but in the time that packet loss is greater than 20%, user can obviously feel the reduction of communication quality, so packet loss threshold value that can non-real-time service is set to 15%.
Step 3, obtains real time business and non-real-time service packet loss separately under every kind of communication pattern.Here can obtain packet loss by routine techniques means.
Step 4, according to priority order from high to low, the contrast of the packet loss that step 3 the is obtained threshold value corresponding with it, finds the network of current the most applicable access to switch.
Be specifically described below by two embodiment:
Implement one---the switching of wifi internet and 3G network:
As shown in Figure 2, mobile terminal with wifi and 3G module is in the network that a wifi and 3G coexist, by the business on the some communication pattern accesses network service servers in wifi or 3G.In access service server, the packet loss of this business can be monitored and obtain to mobile terminal in real time.
Fig. 3 and Fig. 4 have shown the basic procedure of selection strategy of the present invention, and mobile terminal has two kinds of initial conditions, the switching under wifi pattern and the switching under 3G pattern.
First, 4 kinds of basic communication services of definition:
Wifi-real time business: such as, by the multimedia service of wifi access to netwoks, video, voice etc.;
Wifi-non-real-time service: such as, by the business without real time reaction of wifi access to netwoks, background and session service etc.;
3G-real time business: the multimedia service of accessing by 3G network, such as video, voice etc.;
3G-non-real-time service: by 3G network, the business without real time reaction of access, such as background and session service etc.;
Set wifi-in real time and the packet loss threshold value η of 3G-real time business 1, set the packet loss threshold value η of the non real-time and 3G-non-real-time service of wifi- 2.Here η, 1value get 8%, η 2value get 15%.
Obtain that wifi-is real-time, wifi-is non real-time, 3G-is real-time, the packet loss of the non real-time four kinds of business of 3G-, be respectively k w1, k w2, k g1, k g2.
The threshold value that the packet loss obtaining is corresponding with it compares, and contrasts switching according to the non real-time priority policy of the non real-time > 3G-of the real-time > wifi-of the real-time > 3G-of wifi-.
Detailed process is as follows:
When mobile terminal is under wifi pattern, as shown in Figure 3, concrete implementation step is as follows:
Step 111: mobile terminal uses wifi mode access service server, obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2.
Step 112: mobile terminal is by the packet loss k obtaining from step 111 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal continues, by wifi accesses network business, not carry out pattern switching; If k w1> η 1, forward step 113 to.
Step 113: mobile terminal starts 3G communication pattern temporarily, is used 3G mode access service server, and obtains the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2.
Step 114: mobile terminal is by the packet loss k obtaining from step 113 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will be determined switching, with 3G mode access service server; If k g1> η 1, forward step 115 to.
Step 115: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare.If k w2≤ η 2, mobile terminal will switch back original wifi pattern, and determines with wifi mode access service server; If k w2> η 2, forward step 116 to.
Step 116: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare.If k g2≤ η 2, mobile terminal will be determined switching, with 3G mode access service server; If k g2> η 2; The wifi pattern that mobile terminal switchback is original, and declare that all-network is congested.
When mobile terminal is in 3G pattern lower time, as shown in Figure 4, concrete implementation step is as follows:
Step 121: mobile terminal uses 3G network access service server, and obtain the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2.
Step 122: mobile terminal is by the packet loss k obtaining from step 121 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will keep present mode constant, continue with 3G mode access service server; If k g1> η 1, forward step 123 to.
Step 123: mobile terminal will interrupt starts wifi communication pattern temporarily, uses wifi module accesses service server, and obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2.
Step 124: mobile terminal is by the packet loss k obtaining from step 123 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal will be determined switching, with wifi mode access service server; If k w1> η 1, forward step 125 to.
Step 125: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare.If k w2≤ η 2, mobile terminal will be determined the wifi pattern that switches to, with wifi module accesses service server; If k w2> η 2, forward step 126 to.
Step 126: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare.If k g2≤ η 2, mobile terminal will switch back 3G pattern, with 3G mode access service server; If k g2> η 2; The 3G pattern that mobile terminal switchback is original, and declare that all-network is congested.
Implement two---the switching between wifi network, WiMAX internet and 3G network:
WiMAX full name is worldwide interoperability for microwave access, it is a wireless access wide band technology towards metropolitan area network (WMAN) based on IEEE 802.16 standards, can provide the high speed of Internet to connect, data transmission distance can reach 50km farthest, along with WiMAX progressively realizes the mobile of broadband services, it will become the important component part of following heterogeneous network.
As shown in Figure 5, mobile terminal with wifi, WiMAX, 3G module is in the network that wifi, a WiMAX and 3G coexist, by the business on the some communication pattern accesses network service servers in wifi, WiMAX or 3G, in access service server, the packet loss of this business can be monitored and obtain to mobile terminal in real time.
Fig. 6, Fig. 7 and Fig. 8 have shown the basic procedure of the selection strategy of present embodiment, and mobile terminal has three kinds of initial conditions, switching, the switching under WiMAX pattern and the switching under 3G pattern under wifi pattern.
First, 6 kinds of basic communication services of definition:
Wifi-real time business: such as, by the multimedia service of wifi access to netwoks, video, voice etc.;
Wifi-non-real-time service: such as, by the business without real time reaction of wifi access to netwoks, background and session service etc.;
WiMAX-real time business: such as, by the multimedia service of WiMAX access to netwoks, video, voice etc.;
WiMAX-non-real-time service: such as, by the business without real time reaction of WiMAX access to netwoks, background and session service etc.;
3G-real time business: the multimedia service of accessing by 3G network, such as video, voice etc.;
3G-non-real-time service: the business without real time reaction of accessing by 3G network, such as background and session service etc.;
Setting wifi-is real-time, WiMAX-real-time and the packet loss threshold value η of 3G-real time business 1, setting wifi-is non real-time, WiMAX-is non real-time and the packet loss threshold value η of 3G-non-real-time service 2.Here η, 1value get 8%, η 2value get 15%.
Obtain that wifi-is real-time, wifi-is non real-time, WiMAX-is real-time, WiMAX-is non real-time, 3G-is real-time, the packet loss of the non real-time four kinds of business of 3G-, be respectively k w1, k w2, k m1, k m2, k g1, k g2.
The threshold value that the packet loss obtaining is corresponding with it compares, and contrasts switching according to the non real-time priority policy of the non real-time > 3G-of the non real-time > WiMAX-of the real-time > wifi-of the real-time > 3G-of the real-time > WiMAX-of wifi-.
Detailed process is as follows:
When mobile terminal is under wifi pattern, as shown in Figure 6, concrete implementation step is as follows:
Step 211: mobile terminal uses wifi mode access service server, obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2.
Step 212: mobile terminal is by the packet loss k obtaining from step 211 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal continues, by wifi accesses network business, not carry out pattern switching; If k w1> η 1, forward step 213 to.
Step 213: mobile terminal starts WiMAX communication pattern temporarily, is used WiMAX mode access service server, and obtains the packet loss k of terminal access real time business m1packet loss k with access non-real-time service m2.
Step 214: mobile terminal is by the packet loss k obtaining from step 213 m1threshold value η with WiMAX-real time business 1compare, if k m1≤ η 1, mobile terminal will be determined switching, with WiMAX mode access service server; If k m1> η 1, forward step 215 to.
Step 215: mobile terminal starts 3G communication pattern temporarily, is used 3G mode access service server, and obtains the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2.
Step 216: mobile terminal is by the packet loss k obtaining from step 215 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will be determined switching, with 3G mode access service server; If k g1> η 1, forward step 217 to.
Step 217: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare.If k w2≤ η 2, mobile terminal will switch back original wifi pattern, and determines with wifi mode access service server; If k w2> η 2, forward step 218 to.
Step 218: mobile terminal is by the packet loss k of WiMAX-non-real-time service m2with its threshold value η 2compare.If k m2≤ η 2, mobile terminal will be switched to WiMAX pattern, with WiMAX mode access service server; If k m2> η 2, forward step 219 to.
Step 219: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare.If k g2≤ η 2, mobile terminal will be determined switching, with 3G mode access service server; If k g2> η 2; The wifi pattern that mobile terminal switchback is original, and declare that all-network is congested.
When mobile terminal is under WiMAX pattern, as shown in Figure 7, concrete implementation step is as follows:
Step 221: mobile terminal uses WiMAX mode access service server, obtains the packet loss k of mobile terminal accessing real time business m1packet loss k with access non-real-time service m2.
Step 222: mobile terminal is by the packet loss k obtaining from step 221 m1threshold value η with wifi-real time business 1compare, if k m1≤ η 1, mobile terminal continues, by WiMAX accesses network business, not carry out pattern switching; If k m1> η 1, forward step 223 to.
Step 223: mobile terminal starts wifi communication pattern temporarily, is used wifi mode access service server, and obtains the packet loss k of terminal access real time business w1packet loss k with access non-real-time service w2.
Step 224: mobile terminal is by the packet loss k obtaining from step 223 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal will be determined switching, with wifi mode access service server; If k w1> η 1, forward step 225 to.
Step 225: mobile terminal starts 3G communication pattern temporarily, is used 3G mode access service server, and obtains the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2.
Step 226: mobile terminal is by the packet loss k obtaining from step 225 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will be determined switching, with 3G mode access service server; If k g1> η 1, forward step 227 to.
Step 227: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare.If k w2≤ η 2, mobile terminal will switch to wifi pattern, and determine with wifi mode access service server; If k w2> η 2, forward step 228 to.
Step 228: mobile terminal is by the packet loss k of WiMAX-non-real-time service m2with its threshold value η 2compare.If k m2≤ η 2, mobile terminal will be switched to WiMAX pattern, with WiMAX mode access service server; If k m2> η 2, forward step 229 to.
Step 229: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare.If k g2≤ η 2, mobile terminal will be determined switching, with 3G mode access service server; If k g2> η 2; The WiMAX pattern that mobile terminal switchback is original, and declare that all-network is congested.
When mobile terminal is in 3G pattern lower time, as shown in Figure 8, concrete implementation step is as follows:
Step 231: mobile terminal uses 3G network access service server, and obtain the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2.
Step 232: mobile terminal is by the packet loss k obtaining from step 231 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will keep present mode constant, continue with 3G mode access service server; If k g1> η 1, forward step 233 to.
Step 233: mobile terminal will interrupt starts wifi communication pattern temporarily, uses wifi module accesses service server, and obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2.
Step 234: mobile terminal is by the packet loss k obtaining from step 233 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal will be determined switching, with wifi mode access service server; If k w1> η 1, forward step 235 to.
Step 235: mobile terminal starts WiMAX communication pattern temporarily, is used WiMAX mode access service server, and obtains the packet loss k of terminal access real time business m1packet loss k with access non-real-time service m2.
Step 236: mobile terminal is by the packet loss k obtaining from step 235 m1threshold value η with WiMAX-real time business 1compare, if k m1≤ η 1, mobile terminal will be determined switching, with WiMAX mode access service server; If k m1> η 1, forward step 237 to.
Step 237: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare.If k w2≤ η 2, mobile terminal will switch back wifi pattern, and determine with wifi mode access service server; If k w2> η 2, forward step 238 to.
Step 238: mobile terminal is by the packet loss k of WiMAX-non-real-time service m2with its threshold value η 2compare.If k m2≤ η 2, mobile terminal will be determined switching, with WiMAX mode access service server; If k m2> η 2, forward step 239 to.
Step 239: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare.If k g2≤ η 2, mobile terminal will be switched to 3G pattern, with 3G mode access service server; If k g2> η 2; Mobile terminal switchback 3G pattern, and declare that all-network is congested.
Multi-mode switching method of the present invention, by the current communication performance of communication service perception, through decision-making, can be selected optimum communication pattern, can make the more effective use Internet resources of user, and strengthen anti-interrupt communication ability.Switchover policy of the present invention, based on service-aware, can be understood the situation of terminal access network business, in time, accurately for user provides higher-quality communication service.
Those of ordinary skill in the art will appreciate that, embodiment described here is in order to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not depart from essence of the present invention according to these technology enlightenments disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.

Claims (2)

1. a multi-mode switching method for heterogeneous network, specifically comprises the steps:
Step 1, determines real time business and non-real-time service under every kind of communication pattern in heterogeneous network, and described real time business is the business that needs real time data mutual, and described non-real-time service is the business of access without real time reaction; And the priority between plurality of communication schemes in definite heterogeneous network;
Step 2, sets real time business and non-real-time service packet loss threshold value separately under every kind of communication pattern;
Step 3, obtains real time business and non-real-time service packet loss separately under every kind of communication pattern;
Step 4, according to priority order from high to low, the contrast of the packet loss that step 3 the is obtained threshold value corresponding with it, finds the network of current the most applicable access to switch;
Communication pattern in described heterogeneous network is specially wifi internet and 3G network;
Described multi-mode switching method specifically comprises the steps:
First, 4 kinds of basic communication services of definition:
Wifi-real time business: by the multimedia service of wifi access to netwoks;
Wifi-non-real-time service: by the business without real time reaction of wifi access to netwoks;
3G-real time business: the multimedia service of accessing by 3G network;
3G-non-real-time service: the business without real time reaction of accessing by 3G network;
Set wifi-in real time and the packet loss threshold value η of 3G-real time business 1, set the packet loss threshold value η of the non real-time and 3G-non-real-time service of wifi- 2;
Obtain that wifi-is real-time, wifi-is non real-time, 3G-is real-time, the packet loss of the non real-time four kinds of business of 3G-, be respectively k w1, k w2, k g1, k g2;
The threshold value that the packet loss obtaining is corresponding with it compares, contrast switching according to the non real-time priority policy of the non real-time >3G-of the real-time >wifi-of the real-time >3G-of wifi-, detailed process is as follows:
When mobile terminal is in wifi pattern lower time, concrete implementation step is as follows:
Step 111: mobile terminal uses wifi mode access service server, obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2;
Step 112: mobile terminal is by the packet loss k obtaining from step 111 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal continues, by wifi accesses network business, not carry out pattern switching; If k w1> η 1, forward step 113 to;
Step 113: mobile terminal starts 3G communication pattern temporarily, is used 3G mode access service server, and obtains the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2;
Step 114: mobile terminal is by the packet loss k obtaining from step 113 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will be determined switching, with 3G mode access service server; If k g1> η 1, forward step 115 to;
Step 115: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare, if k w2≤ η 2, mobile terminal will switch back original wifi pattern, and determines with wifi mode access service server; If k w2> η 2, forward step 116 to;
Step 116: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare, if k g2≤ η 2, mobile terminal will be determined switching, with 3G mode access service server; If k g2> η 2; The wifi pattern that mobile terminal switchback is original, and declare that all-network is congested;
When mobile terminal is in 3G pattern lower time, concrete implementation step is as follows:
Step 121: mobile terminal uses 3G network access service server, and obtain the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2;
Step 122: mobile terminal is by the packet loss k obtaining from step 121 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will keep present mode constant, continue with 3G mode access service server; If k g1> η 1, forward step 123 to;
Step 123: mobile terminal will interrupt starts wifi communication pattern temporarily, uses wifi module accesses service server, and obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2;
Step 124: mobile terminal is by the packet loss k obtaining from step 123 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal will be determined switching, with 3G mode access service server; If k w1> η 1, forward step 125 to;
Step 125: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare; If k w2≤ η 2, mobile terminal will be determined the wifi pattern that switches to, with wifi module accesses service server; If k w2> η 2, forward step 126 to;
Step 126: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare; If k g2≤ η 2, mobile terminal will switch back 3G pattern, with 3G mode access service server; If k g2> η 2; The 3G pattern that the same switchback of mobile terminal is original, and declare that all-network is congested.
2. a multi-mode switching method for heterogeneous network, specifically comprises the steps:
Step 1, determines real time business and non-real-time service under every kind of communication pattern in heterogeneous network, and described real time business is the business that needs real time data mutual, and described non-real-time service is the business of access without real time reaction; And the priority between plurality of communication schemes in definite heterogeneous network;
Step 2, sets real time business and non-real-time service packet loss threshold value separately under every kind of communication pattern;
Step 3, obtains real time business and non-real-time service packet loss separately under every kind of communication pattern;
Step 4, according to priority order from high to low, the contrast of the packet loss that step 3 the is obtained threshold value corresponding with it, finds the network of current the most applicable access to switch;
Communication pattern in described heterogeneous network is specially wifi network, 3G network and WiMAX network;
Described multi-mode switching method specifically comprises the steps:
First, 6 kinds of basic communication services of definition:
Wifi-real time business: by the multimedia service of wifi access to netwoks;
Wifi-non-real-time service: by the business without real time reaction of wifi access to netwoks;
WiMAX-real time business: by the multimedia service of WiMAX access to netwoks;
WiMAX-non-real-time service: by the business without real time reaction of WiMAX access to netwoks;
3G-real time business: the multimedia service of accessing by 3G network;
3G-non-real-time service: the business without real time reaction of accessing by 3G network;
Setting wifi-is real-time, WiMAX-real-time and the packet loss threshold value η of 3G-real time business 1, setting wifi-is non real-time, WiMAX-is non real-time and the packet loss threshold value η of 3G-non-real-time service 2;
Obtain that wifi-is real-time, wifi-is non real-time, WiMAX-is real-time, WiMAX-is non real-time, 3G-is real-time, the packet loss of the non real-time four kinds of business of 3G-, be respectively k w1, k w2, k m1, k m2, k g1, k g2;
The threshold value that the packet loss obtaining is corresponding with it compares, contrast switching according to the non real-time priority policy of the non real-time >3G-of the non real-time >WiMAX-of the real-time >wifi-of the real-time >3G-of the real-time >WiMAX-of wifi-, detailed process is as follows:
When mobile terminal is under wifi pattern, concrete implementation step is as follows:
Step 211: mobile terminal uses wifi mode access service server, obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2;
Step 212: mobile terminal is by the packet loss k obtaining from step 211 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal continues, by wifi accesses network business, not carry out pattern switching; If k w1> η 1, forward step 213 to;
Step 213: mobile terminal starts WiMAX communication pattern temporarily, is used WiMAX mode access service server, and obtains the packet loss k of terminal access real time business m1packet loss k with access non-real-time service m2;
Step 214: mobile terminal is by the packet loss k obtaining from step 213 m1threshold value η with WiMAX-real time business 1compare, if k m1≤ η 1, mobile terminal will be determined switching, with WiMAX mode access service server; If k m1> η 1, forward step 215 to;
Step 215: mobile terminal starts 3G communication pattern temporarily, is used 3G mode access service server, and obtains the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2;
Step 216: mobile terminal is by the packet loss k obtaining from step 215 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will be determined switching, with 3G mode access service server; If k g1> η 1, forward step 217 to;
Step 217: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare; If k w2≤ η 2, mobile terminal will switch back original wifi pattern, and determines with wifi mode access service server; If k w2> η 2, forward step 218 to;
Step 218: mobile terminal is by the packet loss k of WiMAX-non-real-time service m2with its threshold value η 2compare; If k m2≤ η 2, mobile terminal will be switched to WiMAX pattern, with WiMAX mode access service server; If k m2> η 2, forward step 219 to;
Step 219: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare; If k g2≤ η 2, mobile terminal will be determined switching, with 3G mode access service server; If k g2> η 2; The wifi pattern that mobile terminal switchback is original, and declare that all-network is congested;
When mobile terminal is under WiMAX pattern, concrete implementation step is as follows:
Step 221: mobile terminal uses WiMAX mode access service server, obtains the packet loss k of mobile terminal accessing real time business m1packet loss k with access non-real-time service m2;
Step 222: mobile terminal is by the packet loss k obtaining from step 221 m1threshold value η with wifi-real time business 1compare, if k m1≤ η 1, mobile terminal continues, by wifi accesses network business, not carry out pattern switching; If k m1> η 1, forward step 223 to;
Step 223: mobile terminal starts wifi communication pattern temporarily, is used WiMAX mode access service server, and obtains the packet loss k of terminal access real time business w1packet loss k with access non-real-time service w2;
Step 224: mobile terminal is by the packet loss k obtaining from step 223 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal will be determined switching, with wifi mode access service server; If k w1> η 1, forward step 225 to;
Step 225: mobile terminal starts 3G communication pattern temporarily, is used 3G mode access service server, and obtains the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2;
Step 226: mobile terminal is by the packet loss k obtaining from step 225 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will be determined switching, with 3G mode access service server; If k g1> η 1, forward step 227 to;
Step 227: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare; If k w2≤ η 2, mobile terminal will switch to wifi pattern, and determine with wifi mode access service server; If k w2> η 2, forward step 228 to;
Step 228: mobile terminal is by the packet loss k of WiMAX-non-real-time service m2with its threshold value η 2compare; If k m2≤ η 2, mobile terminal will be switched to WiMAX pattern, with WiMAX mode access service server; If k m2> η 2, forward step 229 to;
Step 229: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare; If k g2≤ η 2, mobile terminal will be determined switching, with 3G mode access service server; If k g2> η 2; The WiMAX pattern that mobile terminal switchback is original, and declare that all-network is congested;
When mobile terminal is in 3G pattern lower time, concrete implementation step is as follows:
Step 231: mobile terminal uses 3G network access service server, and obtain the packet loss k of mobile terminal accessing real time business g1packet loss k with access non-real-time service g2;
Step 232: mobile terminal is by the packet loss k obtaining from step 231 g1threshold value η with 3G-real time business 1compare, if k g1≤ η 1, mobile terminal will keep present mode constant, continue with 3G mode access service server; If k g1> η 1, forward step 233 to;
Step 233: mobile terminal will interrupt starts wifi communication pattern temporarily, uses wifi module accesses service server, and obtains the packet loss k of mobile terminal accessing real time business w1packet loss k with access non-real-time service w2;
Step 234: mobile terminal is by the packet loss k obtaining from step 233 w1threshold value η with wifi-real time business 1compare, if k w1≤ η 1, mobile terminal will be determined switching, with wifi mode access service server; If k w1> η 1, forward step 235 to;
Step 235: mobile terminal starts WiMAX communication pattern temporarily, is used WiMAX mode access service server, and obtains the packet loss k of terminal access real time business m1packet loss k with access non-real-time service m2;
Step 236: mobile terminal is by the packet loss k obtaining from step 235 m1threshold value η with WiMAX-real time business 1compare, if k m1≤ η 1, mobile terminal will be determined switching, with WiMAX mode access service server; If k m1> η 1, forward step 237 to;
Step 237: mobile terminal is by the packet loss k of wifi-non-real-time service w2with its threshold value η 2compare; If k w2≤ η 2, mobile terminal will switch back wifi pattern, and determine with wifi mode access service server; If k w2> η 2, forward step 238 to;
Step 238: mobile terminal is by the packet loss k of WiMAX-non-real-time service m2with its threshold value η 2compare; If k m2≤ η 2, mobile terminal will be determined switching, with WiMAX mode access service server; If k m2> η 2, forward step 239 to;
Step 239: mobile terminal is by the packet loss k of 3G-non-real-time service g2with its threshold value η 2compare; If k g2≤ η 2, mobile terminal will be switched to 3G pattern, with 3G mode access service server; If k g2> η 2; Mobile terminal switchback 3G pattern, and declare that all-network is congested.
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