CN102045776A - Adaptive traffic stream switching method for communication network system and corresponding server - Google Patents

Abstract

The present invention provides an adaptive service flow switching method. For each multi-interface terminal, the following steps are performed: 1) The service flow switching management server periodically obtains the current user information and current link status of the multi-interface terminal; 2) The business flow switching management server establishes a judgment matrix based on the AHP respectively, and calculates the comprehensive satisfaction degree of each interface of the multi-interface terminal; 3) Arranges each business flow according to the order of business priority from high to low Forming a pre-switching queue, arranging the interfaces to form an interface queue according to the order of interface comprehensive satisfaction from high to low; 4) establishing a mapping between each service flow and each interface to form a matching relationship; 5) performing service flow switching according to the matching relationship . The invention can accurately reflect the communication performance of each current network interface. The present invention does not significantly increase the overhead of the user end. The present invention fully considers the needs of users while ensuring the QOS of each service flow. The present invention supports both mobile scenes and non-mobile scenes.

Description

Adaptive service flow switching method and corresponding server for communication network system

technical field

The present invention relates to the technical field of service flow distribution, in particular, the present invention relates to an adaptive service flow switching method for a communication network system and a corresponding service flow switching management server.

Background technique

The next-generation communication network will be an all-IP network that integrates multiple access methods. The mixed and heterogeneous characteristics of this network provide broad prospects for the application of multi-interface terminals. The multi-interface terminal integrates multiple interfaces, and can simultaneously use multiple wired resources and wireless resources for service flow transmission. In the 3G or even post-3G era, multiple systems coexist. TD-SCDMA, WCDMA, CDMA2000, LTE, etc. may exist in the network of one or more operators at the same time, and multi-interface terminals that support multiple systems at the same time are also constantly developing. , which leads to the problem of switching between the interfaces of the multi-interface terminal.

The handover supported by the current multi-interface terminal can already realize the handover with the interface as the granularity and the handover with the stream as the granularity. Switching at the granularity of interfaces enables applications with different QoS requirements to be bound and switched together, making it impossible for each application to switch to the most suitable network interface. The flow-based switching can avoid the above problems.

At present, most of the interface switching schemes with flow as the granularity are initiated by the terminal, which makes the terminal increase a lot of overhead in addition to normal communication.

The patent application CN200910083521.7 of the Institute of Computing Technology, Chinese Academy of Sciences proposes a multi-interface service flow switching method and device in a mobile communication system, which is a user-triggered service flow switching method and device in a proxy mobile IPv6 environment. Patent application 200910087426.4 filed by Huawei Technologies Co., Ltd. proposes a service flow switching method, system and network device that simultaneously support user trigger and network trigger in a proxy mobile IPv6 environment. Both of the above two patents are intelligent handover decision algorithms that involve handover decisions based on various factors such as the characteristics of different types of service flows, current link conditions, and other user needs. Therefore, it is difficult to reasonably allocate service flows to different network interfaces of terminals. superior.

In addition, the above stream switching technologies only support mobile scenarios, and multi-interface terminals in non-mobile scenarios cannot enjoy the service of service stream switching.

Therefore, there is an urgent need for a solution that can support both mobile and non-mobile scenarios, and can reasonably allocate service flows to different terminals according to various factors such as the characteristics of different types of service flows, current link conditions, and other user needs. An adaptive service flow switching method on a network interface and a corresponding service flow switching management server.

Contents of the invention

The purpose of the present invention is to provide a system that supports both mobile and non-mobile scenarios, and can reasonably allocate service flows to different terminals according to various factors such as the characteristics of different types of service flows, current link conditions, and other user needs. An adaptive service flow switching method on a network interface and a corresponding service flow switching management server.

In order to achieve the purpose of the above invention, the present invention provides an adaptive service flow switching method, which involves a service flow switching management server and a multi-interface terminal. The adaptive service flow switching method includes:

For each multi-interface terminal, perform the following steps:

1) The service flow switching management server periodically acquires the current user information and current link status of the multi-interface terminal;

2) The business flow switching management server establishes a judgment matrix based on the AHP, and calculates the comprehensive satisfaction degree of each interface of the multi-interface terminal; wherein, the comprehensive satisfaction degree of the interface is taken as the overall goal of the target layer, and the current user Information and current link status are used as sub-targets of the criterion layer, and each available interface of the multi-interface terminal is used as an optional solution of the solution layer;

3) According to the order of business priority from high to low, arrange each service flow to form a pre-handover queue, and arrange each interface to form an interface queue according to the order of interface comprehensive satisfaction from high to low;

4) According to the pre-handover queue and the interface queue, each service flow is mapped with each interface to form a matching relationship;

5) The service flow switching management server performs service flow switching on the multi-interface terminal according to the mapping relationship.

Wherein, the user information includes an interface type.

Wherein, the link status includes interface load, available bandwidth and received signal strength indication.

Wherein, in the step 1), the interface type, interface load, available bandwidth and received signal strength indication of each multi-interface terminal are obtained by the service flow switching management server from the network end.

Wherein, the link status also includes a packet loss rate.

Wherein, said step 1) also includes the following sub-steps:

11) After the multi-interface terminal connects to the home domain, it initiates registration to the service flow switching management server, and the registration message carries user information, and the user information includes a priority option, which indicates that the user can explicitly Specify the priority of business flows;

12) The service flow switching management server saves the user information in the registration message after receiving it;

13) The multi-interface terminal periodically sends a status update message to the service flow switching management server; the status update message carries current user information;

14) The service flow switching management server updates the current user information according to the status update message.

Wherein, when the communication network system works in a mobile scenario, in the steps 11) to 14), the service flow switching management server is a service flow switching management server in the home domain;

The step 1) also includes step 15) when the terminal moves from the connected domain to the foreign domain, the service flow switching management server of the accessed foreign domain periodically counts the current link status, and sends it to the service flow switching management server of the home domain ;

In the steps 2) to 5), the service flow switching management server is a service flow switching management server in the home domain.

Wherein, all interfaces of the multi-interface terminal are wireless interfaces; or there are both wireless interfaces and wired interfaces; or all interfaces are wired.

Wherein, when the multi-interface terminal has a wired interface, the wired interface assigns a virtual RSSI, and the virtual RSSI is assigned a value according to the maximum virtual RSSI of the wireless interface.

Wherein, said step 4) includes the following sub-steps:

41) If the pre-switching queue is empty, then directly jump to step 5), otherwise, enter step 42);

42) The service flow switching management server takes out the leader service from the pre-switching queue, takes out the leader interface from the interface queue, and establishes a mapping between the taken out service flow and the interface;

43) If the interface queue is empty, then enter step 44), otherwise, jump to step 41);

44) Re-enroll the interfaces according to the order of the current comprehensive satisfaction level.

Wherein, said step 5) includes the following sub-steps:

51) The service flow switching management server performs switching at the local end, and switches the downlink service flow to the matching interface;

52) The service flow switching management server sends a service flow switching instruction to the terminal, and the switching unit of the terminal receives the instruction and executes the switching command to complete the switching of the uplink service flow.

The present invention also provides a business flow switching management server, including:

A statistical unit, configured to periodically acquire current user information and current link status of the multi-interface terminal;

A service flow identification unit, configured to obtain the service priority of each service flow of each multi-interface terminal;

The switching judgment unit is used to respectively establish a judgment matrix according to the AHP, and calculate the comprehensive satisfaction degree of each interface of the multi-interface terminal; wherein, the comprehensive satisfaction degree of the interface is taken as the overall goal of the target layer, and the current user information and the current The link status is used as a sub-target of the criterion layer, and each available interface of the multi-interface terminal is used as an optional solution of the solution layer; it is also used to arrange the service flows in order of service priority from high to low to form a pre-switching queue , according to the order of interface comprehensive satisfaction from high to low, arrange the interfaces to form an interface queue; according to the pre-handover queue and interface queue, map each service flow with each interface to form a matching relationship;

A handover execution unit, configured to perform service flow handover on the multi-interface terminal according to the matching relationship.

Compared with the prior art, the present invention has the following technical effects:

1. The handover judgment part of the present invention is adaptively performed at the server end of the network side, and the additional overhead of the user end is very small.

2. The present invention can accurately reflect the communication performance of each current network interface, which is very important for improving the work quality of the server and user satisfaction.

3. While ensuring the QOS of each service flow, the present invention can make switching judgments according to the user's priority setting for each service flow, fully considering the needs of users.

4. The present invention supports both mobile scenarios and non-mobile scenarios, and can be flexibly combined with existing standards and deployed accordingly.

Description of drawings

FIG. 1 is a flowchart of a method for adaptive service flow switching according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the application of the present invention in a non-mobile scene;

FIG. 3 is a schematic diagram of the application of the present invention in a mobile scene;

Fig. 4 is a schematic diagram of a stream switching system according to an embodiment of the present invention.

Detailed ways

In order to make the method and technical solution of the present invention clearer, a method and system for adaptive service flow switching of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments described here are only used to better explain the present invention, and are not intended to limit the present invention.

Example 1

According to Embodiment 1 of the present invention, a method for adaptive service flow switching is provided, the flow of which refers to FIG. 1, and includes the following steps:

In step S100, the service flow switching management server updates the service flow management table at a certain period. The service flow switching management server analyzes the user information and current link status for each multi-interface terminal in combination with the service flow management table, that is, the service flow switching management server periodically obtains the current user information and current link status of each multi-interface terminal. road condition.

The format of the above service flow management table entry is shown in Table 1:

Table 1

source address Destination address source port number Destination port number business flow type priority Tunnel index number

The service flow management table records specific information of each service flow. Each service flow corresponds to an entry, and the identification of the service flow type can adopt a conventional flow identification method (such as Layer 7 identification). This embodiment does not limit the specific method of flow identification. The service flow type can be set to video, audio, text, etc., where the tunnel index number indicates which tunnel this service flow currently corresponds to.

User information includes the following:

(1) Interface type: the interface is wired or wireless;

(2) Interface status: the interface is available or unavailable;

Current link conditions include the following:

(1) Interface load: reflects the link load of each interface of the user;

(2) Available bandwidth: reflects the current available bandwidth of each interface of the user;

(3) Received Signal Strength Indication (RSSI): This parameter reflects the signal strength of the user's current wireless interface;

(4) Packet loss rate: reflects the current packet loss situation of each interface.

Step S200, for each multi-interface terminal, the service flow switching management server establishes a judgment matrix based on the AHP. The Analytic Hierarchy Process (Analytic Hierarchy Process, AHP) is a decision-making thinking method. The basic idea is to decompose complex problems into several levels and several elements, and simply compare, judge and calculate among the elements to obtain Weighting of different elements and different alternatives. Because of its simplicity and accuracy, it is widely used in various fields such as economy, energy, and management. Therefore, it is very suitable for solving the decision-making problem of obtaining the optimal solution when there are multiple alternatives.

The judgment matrix includes two types, the first judgment matrix represents the mutual comparison of each consideration value with respect to the overall target, and the second judgment matrix represents the mutual comparison of each network interface with respect to each consideration value;

According to the AHP method, each element a _ij in the first judgment matrix represents the relative importance of the consideration value a _i relative to the consideration value a _j relative to the overall target; the consideration value is the sub-target in the AHP algorithm. Each element p _ij in the second type of judgment matrix represents the relative comparison value of interface p _i and interface p _j relative to the consideration value a, where the judgment scale can be selected according to the following principles:

(1)1: For c, q _i and q _j are equally important;

(2) 2: For c, q _i is equally or slightly more important than q _j ;

(3)3: For c, q _i is slightly more important than q _j ;

(4)5: For c, q _i is more important than q _j ;

(5) 7: For c, q _i is more important than q _j ;

(6)9: For c, q _i is absolutely more important than q _j .

For example, if q _i is more important than q _j , then q _ij =5, on the contrary, if q _j is more important than q _i , then q _ij =1/q _ji =1/5, similarly, if a _i is more important than a _j , Then a _ij =5, on the contrary, if a _j is more important than a _i , then a _ij =1/a _ji =1/5, similarly, if p _i is more important than p _j , then p _ij =5, otherwise, if p _j is more important than p _i , then p _ij =1/p _ji =1/5. Although there are only a few values of 1, 2, 3, 5, 7, and 9 in the above value selection principles, those skilled in the art can easily understand that other values can be set according to actual needs.

The above general target refers to the communication environment quality of the current network interface, and the consideration value refers to the current interface type, interface load, available bandwidth, packet loss rate, and RSSI (Received Signal Strength Indication). Table 2 gives an example of the value of the first judgment matrix in this embodiment, but the value of the first judgment matrix is not limited to Table 2, which is easily understood by those skilled in the art.

Table 2

Among them, A represents the communication performance of the interface, C ₁ represents the interface type, C ₂ represents the interface load, C ₃ represents the available bandwidth, C ₄ represents the packet loss rate, and C ₅ represents the RSSI.

In particular, in some cases, only the four parameters of interface type, interface load, available bandwidth, and RSSI may be used as consideration values. In this way, in step S100, the service flow switching management server can directly obtain real-time updates of all considered values from the network side. The user end only needs to perform some basic signaling interaction work (the original user terminal in the mobile scenario also needs signaling interaction), so that the user end will not be interrupted due to adaptive service flow switching except for normal communication. Adds a lot of overhead.

Table 3 shows the structure of the second judgment matrix in this embodiment. However, the structure of the second judgment matrix is not limited to Table 3, which is easily understood by those skilled in the art. For example, when the number of interfaces exceeds 3, the second judgment matrix can also have more rows and columns

table 3

Among them, C represents the consideration value, and P _i represents the i-th interface. The second type of judgment matrix will be established separately according to each consideration value. It is worth noting that since RSSI represents the received signal strength of the wireless interface, in the construction of the second judgment matrix, the virtual RSSI attribute is assigned to the wired interface, because the wired interface transmits data through a guided transmission medium, and does not involve signal strength Therefore, in this embodiment, the virtual RSSI value of the wired interface is assigned the maximum value. That is, in the comparison of RSSI between the wired interface and the wireless interface, it is considered that the wired interface is absolutely more important than the wireless interface.

Further, in a preferred solution, when C represents interface load, available bandwidth and RSSI, the elements in the second judgment matrix can be valued as follows (wherein, the calculation unit of interface load is KB, and the unit of available bandwidth is KB/S, and the unit of RSSI is dBm):

When p _i =p _j , a _ij =1, a _ji =1

0<p _i -p _j <5, a _ij = 2, a _ji = 1/2

When 5<p _i -p _j <10, a _ij = 3, a _ji = 1/3

When 10<p _i -p _j <30, a _{ij =} 5, a _ji = 1/5

When 30<p _i -p _j <50, a _ij = 7, a _ji = 1/7

When 50<p _i -p _j , a _ij =9, a _ji =1/9

When C represents the interface type, the elements in the second judgment matrix can be valued as follows:

Suppose P _i is a wired interface, and P _j is a wireless interface, then a _ij =7, a _ji =1/7. This means that the wired interface P _i is more important than the wireless interface P _j .

When C represents the packet loss rate, the elements in the second judgment matrix can be valued as follows:

When P _i =P _i , a _ij =1, a _ji =1

When 0<P _i -P _j <2%, a _ij = 2, a _ji = 1/2

When 2%<P _i -P _j <5%, a _ij = 3, a _ji = 1/3

When 5%<P _i -P _j <30%, a _ij =5, a _ji =1/5

When P _i -P _j > 30%, a _ij = 7, a _ji = 1/7

The above-mentioned second value-taking method of the judgment matrix element is only an example, and it is easy to understand that the present invention is not limited to the above-mentioned value-taking method.

Step S300, calculating the relative weight.

According to the first type of judgment matrix, calculate the relative weight w _i of the i-th consideration value with respect to the total target, and according to the second type of judgment matrix, calculate the relative weight w _l of the l-th interface with respect to the current consideration value, where, w _i and _wl can be calculated using the square root method, namely:

其中，k表示考量值的个数

Among them, k represents the number of consideration values

其中，m表示网络接口的个数

Among them, m represents the number of network interfaces

Step S400, normalize the weights obtained in step S300, namely:

Among them, k represents the number of consideration values

其中，k表示考量值的个数

Among them, k represents the number of consideration values

Step S500, calculating the comprehensive satisfaction degree of each interface.

来计算，V_n表示第n个接口的综合满意度，其中w_j表示第j个考量值关于总目标的相对权重，w_nj表示第n个接口关于第j个考量值的相对权重，w_j和w_nj的计算以及归一方法同步骤S300、步骤S400。Overall satisfaction can be calculated according to the formula

V _n represents the comprehensive satisfaction of the nth interface, where w _j represents the relative weight of the jth consideration value with respect to the overall goal, w _nj represents the relative weight of the nth interface with respect to the jth consideration value, w _j The calculation and normalization method of and w _nj are the same as step S300 and step S400.

Step S600, according to the service flow management table, form the service flow according to the priority into a pre-handover queue, wherein the service flow with the highest service priority is the head of the queue. According to the comprehensive satisfaction of the interface, the interfaces are arranged to form an interface queue, and the interface with the highest comprehensive satisfaction is the leader of the queue.

In step S700, if the pre-handover queue is empty, directly jump to step S1100, otherwise, go to step S800.

In step S800, the service flow switching management server takes out the leader service from the pre-switching queue, takes out the leader interface from the interface queue, and establishes a mapping between the service flow and the interface.

Step S900, if the interface queue is empty, go to step S1000, otherwise, go to step S700;

Step S1000, re-enroll the interface according to the current level of comprehensive satisfaction, and enter step S700;

Step S1100, the service flow switching management server performs switching according to the matching relationship, and the switching process is divided into two steps:

In step ①, the service flow switching management server performs switching at the local end, and switches the downlink service flow to the matching interface; the above-mentioned downlink service flow refers to the service flow sent from the service flow switching management server to the multi-interface terminal.

In step ②, the service flow switching management server sends a service flow switching instruction to the terminal, and the switching unit of the terminal receives the instruction and automatically executes the switching command to complete the switching of the upstream service flow; The flow switches the service flow sent by the management server.

Wherein, the format of the handover instruction message may be adjusted according to different handover implementation manners. For example, the switching implementation is implemented based on the iptables policy under the NETFILTER framework, then the switching instruction message can be used to store the iptables command, and this embodiment does not limit the specific definition of the switching instruction format.

Step S1200, the algorithm ends.

In this embodiment, the adaptive service flow switching (that is, steps 200-500) is performed periodically and automatically. This embodiment can be applied to the following situations:

(1) The status of all current interfaces remains unchanged, and the matching relationship between business flows and interfaces is re-established;

(2) A current interface becomes unavailable, and the flow on it is distributed to other available interfaces;

(3) At present, an interface becomes available, and some flows on other interfaces are distributed to this interface.

Example 2

According to Embodiment 2 of the present invention, another adaptive service flow switching method is provided, and the adaptive service flow switching solution works in a non-mobile scene.

As shown in Figure 2, in the non-mobile scenario of this embodiment, there are three nodes in the home domain, namely node 1, node 2, and node 3, respectively representing three types of multi-interface terminals: node 1 Represents a multi-interface terminal with all interfaces wireless; node 2 represents a multi-interface terminal with both wireless and wired interfaces; node 3 represents a multi-interface terminal with all interfaces wired.

After the terminal connects to the home domain, it initiates registration with the service flow switching management server. The format of the registration message is shown in Table 4:

Table 4

binding address temporary address Interface Type interface status survival time Priority option

Among them, the binding address is generated by the user according to the combination of the address prefix provided by the service flow switching management server and the terminal ID; the temporary address is the address automatically configured by each interface of the terminal according to the prefix; the interface type indicates whether the interface is wired or wireless; the interface status Indicates that this interface is currently available or unavailable; the lifetime indicates the validity period of the registration information; the priority option indicates that the user can explicitly specify the priority of the stream during the communication process.

After receiving the user information, the service flow switching management server stores it in the user information management table, and sends a response message to the terminal for registration confirmation. The response message format is shown in Table 5 below.

table 5

binding address temporary address Interface Type interface status survival time state

Among them, the meaning of the first five fields is the same as that of the registration message, and will not be repeated here. The status field indicates whether the user registration message or the status update message is successful or not, 0 means failure, and 1 means success.

In the above user information management table, each entry corresponds to an interface of the terminal, and the structure is shown in Table 6.

Table 6

binding address temporary address Interface Type interface status Interface ID

Among them, the meaning of the first four fields is the same as that of the registration message, and will not be repeated here. The interface ID is used to identify an interface of the terminal, which can be a random number, but its uniqueness must be guaranteed. Of course, the present invention does not limit the specific way of defining the interface ID, and the interface ID can also be defined in other ways. For example, using the MAC (Media Access Control) address of this interface, the MAC address field needs to be added in the user's registration message at this time, and the new registration message format is shown in Table 7.

Table 7

binding address temporary address Interface Type interface status survival time Priority option MAC address

After the above registration process is completed, the terminal can communicate with other nodes through the standard IP routing protocol. Among them, the terminal periodically exchanges messages with the service flow switching management server, which specifically involves the following messages:

(1) Status update message: the terminal periodically sends current interface information to the service flow switching server. Its format is the same as that of the registration message, and will not be repeated here.

(2) Request status update message: When the user information lifetime is about to expire, the service flow switching management server will send a request status update message to the user. The message format is the same as the response message, and only the status field needs to be set to 0;

(3) Handover instruction message: the service flow handover management server will send the handover judgment result to the terminal for execution through the handover instruction message, and the message format will be set according to different handover implementation methods. For example, the handover implementation is performed through the NETFILTER framework, Then the message content can contain specific iptables commands. It is easy to understand that in the present invention, the switching instruction message is not limited to a specific implementation manner.

While the terminal periodically interacts with the service flow switching management server, the service flow switching management server will periodically calculate the comprehensive satisfaction degree of each interface based on the AHP algorithm based on user information and link communication quality, and then combine the service The flow priority obtains the matching relationship between the service flow and the interface. The calculation process of the comprehensive satisfaction degree is completely consistent with the steps 200 to 500 in the embodiment 1, and will not be repeated here.

Example 3

According to Embodiment 3 of the present invention, another adaptive service flow switching method is provided, and the adaptive service flow switching solution works in a mobile scene.

As shown in Figure 3, the service flow switching method of this embodiment can work in a variety of mobile scenarios, such as Mobile IPv6 (RFC 3775), Mobile IPv4 (RFC 3344), Proxy Mobile IPv6 (RFC 5213) and related extended mobile management agreement etc. Deploy according to different mobile scenarios. For example, for mobile IPv6, the corresponding unit of the service flow switching management server can be deployed in the HA (Home Agent), and the corresponding unit of the multi-interface terminal can be deployed in the MN (Mobile Node).

In Figure 3, the shown nodes 1, 2, and 3 respectively represent three types of multi-interface terminals: node 1 represents a multi-interface terminal with all interfaces wireless; node 2 represents an existing wireless interface , and a multi-interface terminal with wired interfaces; node 3 represents a multi-interface terminal where all interfaces are wired.

In a mobile scenario, when a multi-interface terminal enters a certain mobile scenario (such as Mobile IPv6, Mobile IPv4, and Proxy Mobile IPv6), in addition to the standard message interaction in this scenario, the following tasks need to be performed:

(1) The multi-interface terminal needs to register the interface with the home service flow switching management server and periodically update the status, and the meaning of the message is the same as that described in the non-mobile scenario;

(2) When the terminal moves from the connected domain to the foreign domain, the service flow switching management server of the connected foreign domain needs to periodically collect statistics on the link communication status and send it to the service flow switching management server of the home domain. Link status message format As shown in Table 8.

Table 8

binding address temporary address interface load available bandwidth RSSI (Received Signal Strength Indication)

(3) The home domain service flow switching management server periodically calculates the comprehensive satisfaction of each interface based on the AHP algorithm based on user information and link communication quality, and then combines the service flow priority to obtain a reasonable match between the service flow and the interface relation. The calculation process of comprehensive satisfaction is the same as that described in step 200 to step 500 in embodiment 1, and will not be repeated here;

(4) The home domain service flow switching management server sends the switching decision result to the multi-interface terminal through a switching instruction message.

It should be pointed out that the above registration message, status update message, link quality status message, and handover command message can implement their functions by extending the standard message in the corresponding mobile scenario, or use the message format defined in the non-mobile scenario. For example, registration messages and status update messages in Mobile IPv6 can be implemented by extending the BU (Binding Update, binding update) message option field; handover instruction messages can be implemented by extending the BRR (Binding Refresh Request, binding update request) message option field accomplish. It is easy to understand that the above various messages are not limited to the above specific implementation manners.

Example 4

This embodiment provides a stream switching system, and the structure of the stream switching system is shown in FIG. 4 .

The stream switching system includes: a multi-interface terminal 100 and a service stream switching management server 200 . Among them, the multi-interface terminal 100 includes three types: all wired interfaces 110 , some wired interfaces, some wireless interfaces 120 , and all wireless interfaces 130 .

The multi-interface terminal 100 includes a registration binding unit 101 and a switching unit 102 . Among them, the registration binding unit 101 is used to obtain the current interface information of the machine, including interface type (wired or wireless), interface status (available or unavailable), binding address, temporary address, wherein the binding address is switched according to the business flow The address prefix provided by the management server is combined with the local ID to generate, and the temporary address is an address automatically configured according to the prefix provided by the business flow switching management server; the switching unit 102 is used to switch the interface on the interface when the interface is unavailable. The upstream service flow is switched to other interfaces, and is also used to receive a switching instruction from the service flow switching management server to execute the switching.

The service flow switching management server 200 includes a registration statistics unit 201 , a service flow identification unit 202 , a handover decision unit 203 , and a handover execution unit 204 . Among them, the registration statistics unit 201 is used to receive the user's registration message, and put the message into the user information management table according to the user, and is also used to periodically obtain the current user information and current link status of the multi-interface terminal; The flow identification unit 202 is used to distinguish the service flow by type, and a more conventional flow identification method (such as Layer 7 identification) can be used, and the type can be set to audio, video, text, and others, and corresponding priorities are set corresponding to different types; switching The decision unit 203 is used to formulate a handover strategy based on user information, current link status, service flow priority and combined with a service flow management table, wherein the multi-objective decision-making theory is used to calculate the AHP (Analytic Hierarchy Process, AHP) The overall satisfaction degree of different network interfaces, the AHP algorithm flow is the same as that described in Embodiment 1, and will not be repeated here; the handover execution unit 204 is used to perform handover according to the handover judgment result. The switching is divided into two steps: the first step, the service flow switching management server 200 executes the switching of the downlink service flow; the second step, sends the switching instruction to the multi-interface terminal 100, which executes the switching of the uplink service flow.

Compared with the prior art, the present invention has the following technical effects:

1. The handover judgment part of the present invention is carried out adaptively at the server end of the network side, and the user end only needs to perform some basic signaling interaction work (while the user terminals in the original mobile scene also need signaling interaction), In other words, besides normal communication on the user side, there is as little additional work as possible.

2. The AHP method is widely used in economics, management, energy and many other fields due to its simplicity and accuracy, comprehensive evaluation and trend prediction of multi-factors, multi-standards, and multi-schemes. However, it has not been used in the field of business flow switching. application. The present invention comprehensively considers its accuracy and simplicity, and uses the AHP algorithm for the handover judgment process, which can greatly reduce the time consumption and power consumption of the server when making handover judgments. At the same time, the five consideration values in the present invention are all convenient Acquisition (which can be realized through the existing user space/kernel space communication mechanism), and can accurately reflect the current communication performance of each network interface. This is very important to improve the quality of work on the server side as well as user satisfaction.

3. While ensuring the QOS of each service flow, the present invention can make switching judgments according to the user's priority setting for each service flow, so as to realize the appropriate allocation of cutouts according to the user's current service quality requirements for each service flow , taking fully into account the needs of users.

4. The present invention supports both mobile scenarios and non-mobile scenarios, and can be flexibly integrated with existing standard Mobile IPv4 (RFC 3344), Mobile IPv6 (RFC 3375), Proxy Mobile IPv6 (RFC 5213) protocols and related extended mobile management protocols Combine with non-mobile management protocols and deploy accordingly. Although the present invention has been described by the embodiments, those skilled in the art know that there are many modifications and changes in the present invention without departing from the spirit of the invention, and the claims of the application documents of the present invention include these modifications and changes.

Claims (12)

1. self-adapted service stream switching method that is used for communications network system, described communications network system comprises Business Stream handover management server and many interface terminations, described self-adapted service stream switching method comprises:

For each many interface termination, carry out the following step:

1) described Business Stream handover management server periodically obtains the active user's information and the current link circuit condition of these many interface terminations;

2) described Business Stream handover management server is set up judgment matrix respectively based on analytic hierarchy process (AHP), and calculates the comprehensive satisfaction of each interface of these many interface terminations; Wherein, with the general objective of interface synthesis satisfaction, with active user's information and current link circuit condition partial objectives for, with each usable interfaces of described many interface terminations possibility as solution layer as rule layer as destination layer;

3) according to service priority order from high to low each Business Stream is arranged formation pre-switch formation, each interface arrangement is formed interface queue according to interface synthesis satisfaction order from high to low;

4), each Business Stream and each interface are set up mapping formation matching relationship according to pre-switch formation and interface queue;

5) Business Stream handover management server is carried out the Business Stream switching according to described matching relationship on many interface terminations.

2. self-adapted service stream switching method according to claim 1 is characterized in that described user profile comprises interface type, and described link circuit condition comprises interface load, available bandwidth and the indication of received signal intensity.

3. self-adapted service stream switching method according to claim 2, it is characterized in that, in the described step 1), the interface type of each many interface terminations, interface load, available bandwidth and the indication of received signal intensity are obtained from network terminal by Business Stream handover management server.

4. self-adapted service stream switching method according to claim 3 is characterized in that described link circuit condition also comprises packet loss.

5. self-adapted service stream switching method according to claim 1 is characterized in that, described step 1) also comprises following substep:

11) after many interface terminations are connected into the territory, local, initiate registration to Business Stream handover management server, carry user profile in the registration message, described user profile comprises priority option, and this priority option is represented the priority of the specified services stream that the user is can be in communication process explicit;

12) Business Stream handover management server is incited somebody to action wherein user profile preservation after receiving registration message;

13) many interface terminations are periodically to Business Stream handover management server transmit status updating message; Carry current user profile in the state updating message;

14) Business Stream handover management server upgrades active user's information according to the state updating message.

6. self-adapted service stream switching method according to claim 5, it is characterized in that, described communications network system is operated in mobile scene following time, described step 11)～14) in, the Business Stream handover management server that described Business Stream handover management server is the territory, local;

Described step 1) comprises that also the foreign lands Business Stream handover management server of access was periodically added up current link circuit condition, and sends to the Business Stream handover management server in territory, local when step 15) was worked as terminal and moved on to foreign lands from being connected into the territory;

Described step 2)～5), the Business Stream handover management server that described Business Stream handover management server is the territory, local.

7. self-adapted service stream switching method according to claim 2 is characterized in that, the total interface of described many interface terminations all is a wave point; Perhaps existing wave point has wireline interface again; Perhaps total interface all is wired.

8. self-adapted service stream switching method according to claim 7, it is characterized in that, when having wireline interface in described many interface terminations, wireline interface is given virtual received signal intensity indication, and this virtual received signal intensity indication is according to the maximum virtual received signal intensity indication assignment of wave point.

9. self-adapted service stream switching method according to claim 4, it is characterized in that, described step 2) in: when subhead is designated as interface load, available bandwidth or the indication of received signal intensity, element value as follows in second kind of judgment matrix in the analytic hierarchy process (AHP):

p _i=p _jThe time, a _Ij=1, a _Ji=1

0＜p _i-p _j＜5 o'clock, a _Ij=2, a _Ji=1/2

5＜p _i-p _j＜10 o'clock, a _Ij=3, a _Ji=1/3

10＜p _i-p _j＜30 o'clock, a _Ij=5, a _Ji=1/5

30＜p _i-p _j＜50 o'clock, a _Ij=7, a _Ji=1/7

50＜p _i-p _jThe time, a _Ij=9, a _Ji=1/9

Wherein, the unit of interface load is KB, and the unit of available bandwidth is KB/S, and the unit of RSSI is dBm; p _iAnd p _jIt is respectively the value that described second kind of judgment matrix i interface load, available bandwidth or received signal the intensity capable and interface that the j row are represented are indicated; a _IjBe the value of described second kind of capable j column element of judgment matrix i, a _JiIt is the value of described second kind of capable i column element of judgment matrix j;

When subhead is designated as interface type, element value as follows in second kind of judgment matrix:

As P _iBe wireline interface, P _jBe wave point, then a _Ij=7, a _Ji=1/7;

a _IjBe the value of described second kind of capable j column element of judgment matrix i, a _JiIt is the value of described second kind of capable i column element of judgment matrix j;

When subhead is designated as packet loss, element value as follows in described second kind of judgment matrix:

Work as P _i=P _jThe time, a _Ij=1, a _Ji=1

As 0＜P _i-P _j＜2% o'clock, a _Ij=2, a _Ji=1/2

As 2%＜P _i-P _j＜5% o'clock, a _Ij=3, a _Ji=1/3

As 5%＜P _i-P _j＜30% o'clock, a _Ij=5, a _Ji=1/5

Work as P _i-P _j＞30% o'clock, a _Ij=7, a _Ji=1/7

Wherein, p _iAnd p _jIt is respectively the value of packet loss of the interface of the capable and j of described second kind of judgment matrix i row representative; a _IjBe the value of described second kind of capable j column element of judgment matrix i, a _JiIt is the value of described second kind of capable i column element of judgment matrix j.

10. self-adapted service stream switching method according to claim 1 is characterized in that, described step 4) comprises following substep:

41) if the pre-switch formation is empty, then leap to step 5), otherwise, enter step 42);

42) described Business Stream handover management server takes out the head of the queue business from the pre-switch formation, takes out the head of the queue interface from interface queue, and the Business Stream and the interface that are taken out are set up mapping;

43) if interface queue is empty, then enter step 44), otherwise, jump to step 41);

44) each interface is joined the team again according to current comprehensive satisfaction height order.

11. self-adapted service stream switching method according to claim 1 is characterized in that, described step 5) comprises following substep:

51) described Business Stream handover management server is carried out at local terminal and is switched, and downstream service flow is switched on the matched interfaces;

52) described Business Stream handover management server sends the Business Stream switching command to terminal, and the switch unit of terminal receives instruction and carries out switching command, finishes the switching of uplink service stream.

12. a Business Stream handover management server is characterized in that, comprising:

Statistic unit is used for periodically obtaining the active user's information and the current link circuit condition of each many interface termination;

The Business Stream recognition unit is used to obtain the service priority of each Business Stream of each many interface termination;

The switch decision unit is used for setting up judgment matrix respectively according to analytic hierarchy process (AHP), and calculates the comprehensive satisfaction of each interface of these many interface terminations; Wherein, with the general objective of interface synthesis satisfaction, with active user's information and current link circuit condition partial objectives for, with each usable interfaces of described many interface terminations possibility as solution layer as rule layer as destination layer; Also be used for each Business Stream being arranged formation pre-switch formation, each interface arrangement formed interface queue according to interface synthesis satisfaction order from high to low according to service priority order from high to low; According to pre-switch formation and interface queue, each Business Stream and each interface are set up mapping formation matching relationship;

Switch performance element, be used on each many interface termination, carrying out Business Stream and switch according to described matching relationship.

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