CN101626596B - Method, device and system for generating service distributing strategy - Google Patents

Abstract

The invention discloses a method for generating a service shunt policy. The method comprises: receiving a service request message carrying at least service type information sent by a user terminal, and determining that the user terminal needs to be shunted according to the service type information. During access control, obtain the network environment information of the first access network to which it belongs and the network environment information of at least one second access network that adopts a different wireless system from the first access network, and obtain the network environment information related to the service type information matching offload suggestion information, and then, according to the offload suggestion information, combine the network environment information of the first access network and the network environment information of at least one second access network to generate a service offload policy. In this way, in a distributed heterogeneous communication system that does not have a common radio resource management entity, the service distribution policy can also be generated in an effective manner, so as to realize service distribution, improve the service quality of the communication system, and further satisfy the requirements of The user's QoS requirements are improved, and the user experience is improved. The invention simultaneously discloses a wireless resource management device and a communication system.

Description

A method, device and system for generating a service diversion strategy

technical field

The present invention relates to the field of communications, in particular to a method, device and system for generating a service distribution strategy.

Background technique

Currently, in a heterogeneous network environment, multiple wireless access technologies coexist, and a multi-mode terminal can simultaneously establish connections with multiple networks through multiple interfaces. Multi-connection technology provides users with seamless network access services. Users can send the same data on multiple links through multi-mode terminals, which greatly improves the reliability of communication. On the other hand, users can also use The multi-mode terminal reasonably distributes service flows among multiple networks, so that the load balancing between the networks is realized to a certain extent, thereby improving the utilization rate of network resources. For example, as shown in FIG. 1A , a user terminal (ie, a multi-mode terminal) is connected to multiple access networks at the same time. The user terminal uses two different addresses (address 1 and address 2) to maintain two links with the access network 1 at the same time, and in addition, the user terminal also uses address 3 and address 4 to connect to the access network 2 and the access network 3 respectively, In this way, the user terminal is connected to the IP backbone network through three access networks at the same time. In this way, bandwidth aggregation is realized by transmitting business flows on multiple networks, thereby obtaining higher data transmission rate and QoS support.

In the EU's End-to-End Reconfiguration (E2R) project, a management framework for Adaptive Radio Multilink (ARMH) is proposed based on the multilink concept of the Internet Engineering Task Force (IETF). It allows multi-mode/multi-frequency terminals to be connected to multiple access networks simultaneously. According to the information of each subnet, terminal, user and service, select the most appropriate joint radio resource management function. The classification of the business, the interaction between the service application server and the radio resource controller, the configuration of the transmission format and the MAC protocol are all managed by the ARMH.

E2R's self-adaptive wireless multi-link proposes a distribution mechanism for the same service flow, and at the same time, the control of service distribution is performed by the network side, which is conducive to realizing real load balancing from the perspective of the network. But the disadvantage is that its implementation scenarios are too idealistic. In this architecture, the access networks carrying the same service are tightly coupled, and have a common resource management control entity (such as RNC in Figure 1B), and service offloading is initiated and controlled by this entity.

However, in actual application scenarios, it is difficult to achieve an ideal tight coupling relationship in the network environment of the communication system, and there is usually no common management entity among the access networks covering user terminals. In the future heterogeneous network environment, the joint radio resource management between heterogeneous networks is realized in a distributed manner, that is, different access networks are managed and controlled by their own radio resource management entities, and the radio resources of each access network Resource management entities work collaboratively through information interaction to optimize resource management. In such a network environment, when a user terminal initiates a service request, how to implement multi-network service distribution is an unresolved problem. Since there is no common management entity among the various access networks, there is no effective control scheme for service offloading. How to realize multi-network cooperation to generate service offloading strategies in such a network environment is not yet feasible. Therefore, it is impossible to truly realize the implementation of business offloading between heterogeneous networks.

Contents of the invention

An embodiment of the present invention provides a method for generating a service distribution strategy, which is used to generate a service distribution strategy through multi-network cooperation in a distributed heterogeneous communication system.

The specific technical scheme that the embodiment of the present invention provides is as follows:

A method for generating a business diversion strategy, comprising the steps of:

The radio resource management device receives a service request message sent by the user terminal, and the service request message carries at least service type information;

When it is determined according to the service type information that offloading access control needs to be performed on the user terminal, acquire network environment information of the first access network to which the radio resource management device belongs and at least one network environment information related to the first access network Network environment information of the second access network of different wireless standards, and obtaining offload suggestion information matching the service type information;

Generate a service offload policy based on the offload suggestion information in combination with network environment information of the first access network and network environment information of at least one second access network.

A radio resource management device, belonging to a first access network, comprising:

a storage unit, configured to store network environment information of the first access network;

A communication unit, configured to receive a service request message sent by a user terminal, where the service request message carries at least service type information;

a judging unit, configured to judge, according to the service type information, whether offload access control needs to be performed on the user terminal;

An acquiring unit, configured to acquire the network environment information of the first access network and at least one network environment information of the first access network and at least one wireless network that is different from the first access network when the judging unit determines that offload access control needs to be performed on the user terminal. Network environment information of the second access network of the standard, and obtaining offload suggestion information matching the service type information;

A decision-making module, configured to generate a service offloading strategy based on the offloading suggestion information in combination with network environment information of the first access network and network environment information of at least one second access network.

A communication system comprising at least two access networks using different wireless access systems, including:

The user terminal is configured to send a service request message to the wireless access radio resource management device in the first access network, where the service request message carries at least service type information;

A radio resource management device, belonging to the first access network, configured to obtain network environment information of the first access network when it is determined according to the service type information that offload access control needs to be performed on the user terminal and at least one network environment information of a second access network that adopts a different wireless system from the first access network, and acquiring offload suggestion information that matches the service type information, and combining with the service type information according to the service type information The network environment information of the first access network and the network environment information of at least one second access network generate a service offloading policy.

In the embodiment of the present invention, the radio resource management device belonging to the first access network, after receiving the service request information carrying at least service type information sent by the user terminal, determines that the user terminal needs to When performing split access control, acquiring network environment information of the first access network and at least one network environment information of a second access network using a different wireless system from the first access network, and acquiring network environment information related to the first access network Offload suggestion information matching the service type information, and generate an offload strategy based on the offload suggestion information in combination with network environment information of the first access network and network environment information of at least one second access network. In this way, in a distributed heterogeneous communication system that does not have a common radio resource management entity, the service distribution policy can also be generated in an effective manner, so as to realize service distribution, improve the service quality of the communication system, and further satisfy the requirements of The user's QoS requirements are improved, and the user experience is improved.

Description of drawings

FIG. 1A and FIG. 1B are architecture diagrams of a distributed heterogeneous communication system in the prior art of the present invention;

FIG. 2 is an architecture diagram of a distributed heterogeneous communication system in an embodiment of the present invention;

FIG. 3 is a functional structural diagram of a radio resource management device in an embodiment of the present invention;

FIG. 4 is a flow chart of a radio resource management device performing admission control on a user terminal in an embodiment of the present invention;

FIG. 5 is a flow chart of generating a service offloading policy by a radio resource management device in an embodiment of the present invention.

Detailed ways

In order to generate a service distribution policy through multi-network cooperation in a distributed heterogeneous communication system, in the embodiment of the present invention, a service request message sent by a user terminal is received, and the service request message carries at least service type information; according to the service type information When it is determined that offloading access control needs to be performed on the user terminal, acquiring the network environment information of the first access network to which the user terminal belongs and at least one second access network using a different wireless system from the first access network Environment information, and obtaining offload suggestion information matching the service type information; according to the offload suggestion information, combining the network environment information of the first access network with the network environment of at least one second access network The information generates a service distribution strategy; wherein, the first access network is a default access network of a user terminal with a multi-mode function.

Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to FIG. 2, in this embodiment, the distributed heterogeneous communication system includes at least two access networks using different wireless access standards, and the distributed heterogeneous communication system includes user terminals 20 and At least two radio resource management devices 21 respectively belonging to different access networks, wherein,

The user terminal 20 is configured to send a service request message to the default wireless access radio resource management device 21 in the first access network, where the service request message at least carries service type information;

The radio resource management device 21, which belongs to the default first access network of the user terminal 20, is used to obtain network environment information of the first access network when it is determined according to the service type information that the user terminal 20 needs to be offloaded and accessed. and at least one network environment information of a second access network that adopts a different wireless system from the default access network, and obtain offload suggestion information that matches the service type information, and combine the first access network according to the offload suggestion information The network environment information of the network environment information and the network environment information of at least one second access network generate an offloading policy.

Referring to FIG. 3 , in this embodiment, the radio resource management device 21 belonging to the default first access network of the user terminal 20 includes a storage unit 210 , a communication unit 211 , a judgment unit 212 , an acquisition unit 213 and a decision unit 214 ;in,

The storage unit 210 is configured to store network environment information of the first access network.

The communication unit 211 is configured to receive a service request message sent by the user terminal 20, where the service request message carries at least service type information.

The judging unit 212 is configured to judge whether it is necessary to perform offloading access control on the user terminal 20 according to the service type information.

The acquiring unit 213 is configured to acquire network environment information of the first access network and at least one second access network using a different wireless system from the first access network when the judging unit 212 determines that offload access control needs to be performed on the user terminal 20 . Network environment information of the incoming network, and obtain offload suggestion information that matches the service type information;

In this embodiment, the information to be obtained can be stored in the storage unit 210 or in an independent policy library, and the obtaining unit 213 can choose where to obtain the required information according to the actual application environment, and details will not be repeated here.

The decision-making unit 214 is configured to generate an offload strategy according to the obtained offload suggestion information in combination with network environment information of the first access network and network environment information of at least one second access network.

In addition, the radio resource management apparatus 21 may further include a measurement unit 215, configured to update the network environment information of the first access network stored in the storage unit 210 according to a set period. Certainly, the measurement unit 215 may also be an independent functional entity arranged outside the radio resource management apparatus 21, and details are not repeated here.

The communication unit 211 in the radio resource management device 21 may also be configured to regularly exchange network environment information of access networks to which each other belongs with the radio resource management device 21 in at least one second access network.

The above-mentioned system architecture is shown in FIG. 2. In this embodiment, the distributed heterogeneous communication system includes two access networks using different wireless standards as an example, which are called access network 1 and access network 1 respectively. 2. Correspondingly, the radio resource management devices 21 belonging to the access network 1 and the access network 2 are respectively referred to as CRRM1 and CRRM2. Usually, the default access network of the user terminal 20 can be used by the user according to his own usage. It is customary to set it yourself. In this embodiment, the default access network of the user terminal 20 is set to access network 1, that is, the user terminal 20 is controlled by CRRM1 by default; and CRRM1 and CRRM 2 are connected between heterogeneous communication systems through information exchange The joint admission control function is realized.

In practical applications, the distributed heterogeneous communication system may also include more than two access networks using different access technologies. This embodiment only introduces the network environment shown in FIG. 2 as an example.

In addition to the above functional entities, as shown in Figure 2, the distributed heterogeneous communication system may also include:

The base station, belonging to each access network, is used to forward the service flow in the IP backbone network to the user terminal 20 in the future, or send the service flow from and to the user terminal 20 to the IP backbone network;

The gateway is used to realize the connection between each access network and the IP backbone network;

The communication peer of the multi-mode terminal is used for remote communication with the user terminal 20 .

Referring to FIG. 4, in this embodiment, when the user terminal 20 accesses the distributed heterogeneous communication system, the detailed process of its admission control by the default CRRM1 is as follows:

Step 400: CRRM1 receives the service request message sent by the user terminal 20, and the service request message carries service type information (including at least the user's quality of service QoS requirement).

In this embodiment, the user terminal 20 resides in the access network 1 by default in an idle state, then, when the user terminal 20 initiates a new session request (that is, sends a new service request message to CRRM1), the management access network The CRRM 1 of 1 performs admission control on the user terminal 20, and selects one or at least two access networks using different access technologies for the session request initiated by the user terminal 20 to access.

On the other hand, in this embodiment, the service request message sent by the user terminal 20 also carries downlink channel state information of each access network, and the downlink channel state information is used to indicate the link quality of the current downlink wireless channel (such as, path loss), the downlink channel state information is measured by the user terminal 20 and reported to CRRM1, and the uplink channel state information is measured by the network side. In addition, the user terminal 20 may also carry identification information used to indicate whether it supports service offloading in the service request message. If the user terminal 20 does not support service offloading due to functional limitations, then even if the requested service can be offloaded, CRRM1 will not Admission control is not performed on service diversion.

Step 410: CRRM1 determines whether the service type requested by the user terminal 20 can be offloaded according to the preset acceptance policy; if so, proceed to step 420; otherwise, proceed to step 470.

In this embodiment, CRRM1 obtains the preset acceptance policy from the policy library, and combines the service type information carried in the service request message to make a split judgment on the service, for example:

If the service type requested by the user terminal 20 is an ordinary voice service, then conventional admission control is directly performed without service shunting;

If the service type requested by the user terminal 20 is a video service, FTP service, etc. that require a higher transmission bandwidth, it is necessary to instruct the user terminal 20 to divide the requested service flow into multiple service sub-flows and transmit them through multiple access networks ;

Step 420: CRRM1 obtains offload suggestion information matching service type information from the policy database, obtains network environment information of access network 1 locally, and receives network environment information of access network 2 sent by CRRM2.

In this embodiment, various offload suggestion information preset corresponding to each service type information is stored in the policy library, and CRRM1 can obtain corresponding offload suggestion information according to the service type information carried in the service request message, and the content of offload suggestion information can be Set it as follows:

Conversational services: For the real-time conversational services, it is not necessary to divide them, or they can be divided into two parts: the control signaling service subflow and the business data service subflow;

Streaming media service: It can be divided according to the two parts of the video service sub-flow and the audio service sub-flow, or according to the basic layer service sub-flow and the enhancement layer service sub-flow;

Interactive business: It can be divided into two parts according to the main (main objects) object business sub-flow and the coordination (in line) object business sub-flow, typical applications such as HTTP business;

Background services: typical applications such as Ftp services, due to the homogeneity of Ftp services (that is, the overall service has the same QoS requirements), therefore, Ftp service flows can be divided arbitrarily.

Step 430: CRRM 1 generates a corresponding service offload strategy based on the obtained offload suggestion information and combined with the network environment information of access network 1 and access network 2.

For example, the service currently requested by the user terminal 20 is a video service, and the offload suggestion information obtained by CRRM 1 indicates that the service flow of the video service is divided into a video substream and an audio substream, and the video substream and the audio substream respectively have different QoS requirements (including delay requirements, rate requirements, etc.); then, CRRM1 searches for the corresponding fitness factor value according to the respective QoS requirements of the video sub-stream and audio sub-stream, that is, combining the network environment of access network 1 and access network 2 The information selects the most suitable access network for the video sub-stream and the audio sub-stream respectively for transmission, so as to realize split access control.

Step 440, CRRM 1 sends the generated service distribution policy to the user terminal 20, so as to instruct the user terminal 20 to perform distribution of the requested service flow.

In this embodiment, the user terminal 20 needs to establish a network connection with the CRRM 2 before distributing the service flow, and the CRRM 1 will notify the user terminal 20 of the relevant information of the CRRM 2 in the service distributing strategy so that it can establish a network connection with the CRRM 2. Network connection: After establishing a network connection with CRRM2, the user terminal 20 divides the service flow requested by itself, and uploads the obtained service sub-flows through CRRM 1 and CRRM 2 respectively.

Step 450: CRRM 1 sends the generated service distribution policy to CRRM 2.

Step 460: CRRM 2 executes the service offload policy issued by CRRM 1, establishes a connection with the user terminal 20, and receives the offloaded service subflow uploaded by the user terminal 20.

Step 470: CRRM 1 performs conventional admission control on the user terminal 20, without instructing it to divert the service flow.

Based on the above-mentioned embodiment, as shown in FIG. 5, in step 430, when CRRM 1 determines that it is necessary to instruct the user terminal 20 to offload its service flow, CRRM 1 combines the access network 1 and the access network 1 according to the offload suggestion information obtained. The detailed process of generating the corresponding service distribution strategy from the network environment information of network 2 is as follows:

Step 500: CRRM 1 obtains the network environment information of the access network 1. In this embodiment, the network environment information of the access network 1 includes at least the adaptability factor of the access network 1 (hereinafter referred to as adaptability factor 1).

In this embodiment, the adaptability factor is used to indicate the suitability of an access network for a type of service, which is specifically defined as: the suitability of the jth access network for the sth service in the pth configuration , which can be expressed by formula 1:

公式1

Formula 1

in,

S _s,j is used to represent the support of the jth access network for the sth service;

Q _{p, s, j} is used to indicate the suitability of the jth access network to the pth configuration of the sth service, which can be preset by the management personnel based on practical experience;

δ is used to represent the network load of the entire access network;

Among them, the load status can be measured by CRRM in the access network, and the load can generally be measured by normalized load. For example: in an LTE network, the number of used subcarriers in the network is compared with the The ratio of the total number as the current network load:

公式2

Formula 2

Among the above three parameters S _{s, j} , Q _{p, s, j} , the values of S _{s, j} and Q _{p, s, j} are pre-set in each CRRM by the management personnel at the initial stage of network planning, and δ The calculation formula of can be preset by the administrator, and its value is regularly updated by the CRRM in the access network according to the preset formula.

for example:

Assume that there are three access networks in total, and their identifiers are: j ₁ , j ₂ , j ₃ ;

Each access network has two optional configuration modes, the identifiers are: p ₁ , p ₂ ;

These three types of networks can support two types of services, and their identifiers are: S ₁ , S ₂ ;

，则表示网络在配置p₁条件下对业务类型为S₁ 的业务的支持度。Then, if the fitness factor is:

, it indicates the support degree of the network for the service of service type S ₁ under the condition of configuring p ₁ .

Among the above three access networks, assuming that the default access network of the user terminal 20 is network j ₂ , the three access networks respectively calculate their respective fitness factors, and the networks j ₁ and j ₃ transmit their own calculation results For network j ₂ , the fitness factors of each access network obtained by network j ₂ can be recorded in a form, as shown in Table 1, for each combination of j, p, and s, a corresponding fitness factor is recorded value, therefore, each access network corresponds to a set of suitability factor values:

Table 1

The above table 1 needs to be updated according to the set period, so that the network j ₂ can know the current network j ₁ in time. Network status of network j ₂ and network j ₃ .

On the other hand, the network environment information may also include network load information, channel quality information, etc. for reference, which will not be repeated here.

Step 510: CRRM2 acquires the network environment information of the access network 2. In this embodiment, the network environment information of the access network 2 includes at least the adaptability factor of the access network 2 (hereinafter referred to as adaptability factor 2).

Similarly, the network environment information obtained by CRRM 2 may also include network load information, channel quality information, etc. for reference, and will not be repeated here.

Step 520: CRRM 2 sends the network environment information of access network 2 to CRRM1.

Step 530: CRRM 1 acquires corresponding offload suggestion information for the service type information requested by the user terminal 20 (eg, user QoS requirements).

In practical applications, CRRM 1 can obtain the diversion suggestion information in the policy library, or, if the manager pre-sets the diversion suggestion information in each CRRM, CRRM 1 can also obtain the required diversion suggestion information locally. In this embodiment This is an example of obtaining diversion suggestion information in the policy library.

On the other hand, in the above-mentioned embodiment, step 500, step 510 and step 520 can be executed periodically, and there is no strict execution order, for example, step 500 and step 510 can also be executed synchronously, or firstly execute step 510, step 520, and then execute step 500, which can also achieve the desired technical effect, and will not be repeated here.

Step 540: CRRM 1 evaluates the network statuses of access network 1 and access network 2 according to the suitability factor 1 and suitability factor 2, and generates a corresponding service offload strategy based on the obtained offload suggestion information.

In the above-mentioned two embodiments, CRRM 1 can also obtain the network environment information of access network 1 locally and the network environment information of access network 2 from CRRM 2 before receiving the service request message sent by user terminal 20, In this way, after receiving the service request information, CRRM 1 can directly obtain the offload suggestion information locally or in the policy library, and combine the respective network environment information of access network 1 and access network 2 to generate the corresponding service offload strategy. An ideal technical effect can be achieved, and details will not be repeated here.

On the other hand, since the network environment of each access network is constantly changing, the CRRM in each access network needs to obtain the network environment information of its own access network according to the set period, and send it to In this way, each CRRM can obtain the network environment information of each access network in a timely manner, thereby controlling the access network status of the entire distributed heterogeneous communication system, so as to combine the QoS requirements proposed by the user terminal 20 for the user The terminal 20 performs distribution access control.

，……与 ，……，两个业务子流的QoS需求分别为Q_T1与Q^T2，接着，用户终端20分别与接入网1和接入网2建立连接，并将分割好的两个业务子流分别通过接入网1和接入网2进行传输。在分布式异构通信系统的网络结构下，若下发的业务分流策略指示将有多个业务子流通过同一接入网络传输，则该接入网络中的CRRM将上述多个业务子流合并后再进行传输，例如，一个业务流被用户终端20分成三个业务子流，分别为：T₁、T₂与T₃，其中，CRRM1下发的业务分流策略指示：T₁通过接入网1传输，T₂与T₃通过接入2传输；则在分流执行阶段，CRRM 2需要将T₂与T₃合并成一条业务流进行传输。Based on the above two embodiments, after the user terminal 20 obtains the finally issued service distribution strategy, it divides the service flow into multiple service sub-flows and adds different labels. For example, in this embodiment, the service flow T is divided into into two business sub-flows, namely:

,……and , ..., the QoS requirements of the two service sub-flows are respectively Q _T1 and Q ^T2 , then, the user terminal 20 establishes connections with the access network 1 and the access network 2 respectively, and separates the two divided service sub-flows Transmission takes place via access network 1 and access network 2. Under the network structure of a distributed heterogeneous communication system, if the issued service distribution policy indicates that multiple service sub-flows will be transmitted through the same access network, the CRRM in the access network will combine the above-mentioned multiple service sub-flows For example, a service flow is divided into three service sub-flows by the user terminal 20, namely: T ₁ , T ₂ and T ₃ , wherein the service distribution policy issued by CRRM1 indicates that: T ₁ passes through the access network 1 for transmission, and _T2 and _T3 for transmission through access 2; then in the splitting execution phase, CRRM 2 needs to combine _T2 and _T3 into one service flow for transmission.

In the embodiment of the present invention, when the default radio resource management device 21 in the access network 1 of the user terminal 20 receives the service request information carrying at least the service type information sent by the user terminal 20, if it determines the need according to the service type information To perform split access control on the user terminal 20, obtain network environment information of access network 1 and at least one network environment information of a second access network that adopts a different wireless system from the first access network, and obtain network environment information related to the service type information. Match the offload suggestion information, and generate an offload strategy according to the obtained offload suggestion information combined with network environment information of the access network 1 and the access network 2. In this way, in a distributed heterogeneous communication system that does not have a common radio resource management entity, a service distribution strategy can also be generated in an effective manner, so as to realize service distribution, improve the service quality of the communication system, and furthermore It meets the QoS requirements of users and improves user experience.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations in the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the embodiments of the present invention are also intended to include these modifications and variations.

Claims (18)

1. A method for generating a service offloading policy is characterized by comprising the following steps:

a wireless resource management device receives a service request message sent by a user terminal, wherein the service request message at least carries service type information;

when determining that the user terminal needs to be subjected to shunt access control according to the service type information, acquiring network environment information of a first access network to which the wireless resource management device belongs, network environment information of at least one second access network which adopts a different wireless system from the first access network, and shunt suggestion information matched with the service type information;

and generating a service distribution strategy by combining the network environment information of the first access network and the network environment information of at least one second access network according to the distribution suggestion information.

2. The method of claim 1, wherein said traffic type information includes at least user quality of service (QoS) requirements.

3. The method of claim 1, wherein after receiving the service request message, the method compares the service type information carried in the service request message with a preset admission policy, and determines that the user terminal needs to be controlled for offloading access when the service type information conforms to rules of the offloading service in the admission policy.

4. The method of claim 3, wherein if the service request message carries identification information for indicating whether the user terminal supports service offloading, when determining that the user terminal supports service offloading according to the identification information, comparing service type information carried in the service request message with a preset admission policy.

5. The method of claim 1, wherein the network environment information of the first access network or the second access network comprises an adaptive factor of the first access network or the second access network, and the adaptive factor is expressed by a formula

Calculating to obtain; wherein,

S_s，jthe system is used for expressing the support degree of the jth access network for the s type service; q_p，s，jS-th service for expressing j-th access network to p-th configurationThe suitability of the affair; δ is used to represent the network load of the entire access network.

6. The method according to any of claims 1-5, wherein the generated traffic offloading policy is sent to the user terminal to instruct it to offload traffic flows, and the traffic offloading policy is sent to at least one radio resource management device in the second access network to instruct it to establish a connection with the user terminal.

7. The method of claim 6, wherein the network environment information of the first access network is updated according to a set period, and the respective network environment information is periodically exchanged with at least one radio resource management device in the second access network.

8. A radio resource management apparatus, belonging to a first access network, comprising:

a storage unit for storing network environment information of the first access network;

a communication unit, configured to receive a service request message sent by a user terminal, where the service request message at least carries service type information;

a judging unit, configured to judge whether to perform a offload access control on the user equipment according to the service type information;

an obtaining unit, configured to obtain, when the determining unit determines that it is necessary to perform offload access control on the user terminal, network environment information of the first access network and network environment information of at least one second access network that uses a different wireless standard from the first access network, and obtain offload suggestion information matched with the service type information;

and the decision module is used for generating a service distribution strategy by combining the network environment information of the first access network and the network environment information of at least one second access network according to the distribution suggestion information.

9. The apparatus as claimed in claim 8, wherein after the communication unit receives the service request message, the determining unit compares the service type information carried in the service request message with a preset admission policy, and when the service type information conforms to a rule of distributable services in the admission policy, the determining unit determines that the user terminal needs to be controlled for offloading access.

10. The apparatus of claim 9, wherein if the service request message carries identification information indicating whether the user terminal supports service offloading, the determining unit compares service type information carried in the service request message with a preset admission policy when determining that the user terminal supports service offloading according to the identification information.

11. The radio resource management apparatus according to claim 8, 9 or 10, wherein the communication unit sends the traffic offloading policy generated by the decision unit to the user terminal to instruct it to offload traffic flows, and sends the traffic offloading policy to at least one radio resource management apparatus in the second access network to instruct it to establish a connection with the user terminal.

12. The radio resource management apparatus of claim 11, further comprising:

and the measuring unit is used for updating the network environment information of the first access network according to a set period.

13. The radio resource management apparatus of claim 12 wherein said communication unit periodically interacts with radio resource management apparatus in at least one of said second access networks for respective network environment information.

14. A communication system including at least two access networks employing different radio access schemes, comprising:

the user terminal is used for sending a service request message to the wireless access wireless resource management device in the first access network, wherein the service request message at least carries service type information;

and the wireless resource management device belongs to the first access network and is used for acquiring network environment information of the first access network, network environment information of at least one second access network which adopts different wireless systems with the first access network and shunt suggestion information matched with the service type information when determining that shunt access control needs to be performed on the user terminal according to the service type information, and generating a service shunt strategy by combining the network environment information of the first access network and the network environment information of the at least one second access network according to the service type information.

15. The communication system according to claim 14, wherein the radio resource management device, after receiving the service request message, compares the service type information carried in the service request message with a preset admission policy, and when the service type information conforms to a rule of distributable services in the admission policy, the radio resource management device determines that the offload access control needs to be performed for the user equipment.

16. The communication system according to claim 15, wherein if the service request message carries identification information for indicating whether the user terminal supports service offloading, the radio resource management device compares the service type information carried in the service request message with a preset admission policy when determining that the user terminal supports service offloading according to the identification information.

17. The communication system according to claim 14, 15 or 16, wherein the radio resource management device sends the generated traffic offloading policy to the user terminal to instruct it to offload traffic flows, and sends the traffic offloading policy to at least one radio resource management device in the second access network to instruct it to establish a connection with the user terminal.

18. The communication system of claim 17, wherein the radio resource management device in the first access network updates the network environment information of the first access network according to a set period, and periodically interacts with the radio resource management device in at least one of the second access networks for the respective network environment information.

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