CN104412648A - Network access method, user equipment, server and access node - Google Patents

Abstract

The invention provides a network access method, a user equipment, a server and an access node. The method comprises: access network information is obtained during switching and comprises IDs of candidate access networks corresponding to at least two access nodes respectively and jamming information of the at least two access nodes; channel quality of the at least two access nodes is measured; according to the channel quality and the jamming information of the at least two access nodes, the candidate access network corresponding to one of the at least two access nodes is picked as a target network; and the target network is accessed. The network access method, the user equipment, the server and the access node solve the problems that when a network is picked for switching in the prior art, only channel quality is considered, which causes jamming and reduced network performance.

Description

Method for network access, subscriber equipment, server and access node

Technical field

The present invention relates to network access technique, particularly relate to a kind of method for network access, subscriber equipment, server and access node.

Background technology

Mobile network can provide the wide area of real-time online to connect, and the data rate of mobile network is low, and user mobility is strong.WLAN (wireless local area network) access technology (Wireless Local Area Networks is called for short WLAN) can provide the data, services of two-forty, high bandwidth in more among a small circle, and user mobility is less, and user density is high.Along with mobile network can support the increase of applying kind and quantity, mobile network needs the service traffics carried also to increase sharply, and causes mobile network user data often to occur congested.WLAN can as the supplementary access technology of mobile network, for user provide fast, the service of low cost.

When realizing the switching between heterogeneous networks, usually mainly consider channel quality problem in objective network selection course, the good network insertion of selective channel quality.Such as in densely-populated auditorium, arrange 3 wireless routers, user selects WLAN access network according to radio signal strength measurement value or the preference of oneself usually.The number of users ideally accessing 3 wireless routers is suitable, but a kind of situation can be there is, the power of a possibility platform wireless router wireless signal emission is stronger, with with signal strength signal intensity being this wireless router of foundation selection per family, although this will cause this wireless router to have good link property, but because number of users is too much, congested very serious via on the path of this wireless router, network performance declines in this case.

Summary of the invention

The embodiment of the present invention provides a kind of method for network access, subscriber equipment, server and access node, only considers that channel quality causes congested, make the problem that network performance declines when selecting network to switch to solve in prior art.

First aspect, the embodiment of the present invention provides a kind of method for network access, comprise: obtain Access Network information when switching, described Access Network information comprises at least two access nodes mark of candidate access network corresponding respectively and the congestion information of described at least two access nodes; The channel quality of at least two access nodes described in measurement; According to channel quality and the congestion information of described at least two access nodes, the candidate access network that at least two access nodes described in selection, access node is corresponding is as objective network; Access described objective network.

In the first possible implementation of first aspect, the channel quality of at least two access nodes described in described basis and congestion information, the candidate access network that at least two access nodes described in selection, access node is corresponding comprises as objective network: according to the channel quality of described at least two access nodes, at least two access nodes described in determining, channel quality meets at least one pre-conditioned access node; According to the described congestion information meeting at least one pre-conditioned access node, meet candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network from described.

According to the first possible implementation of first aspect or first aspect, in the implementation that the second is possible, describedly obtaining Access Network information when switching, comprising: the network switching notice receiving source Access Network; According to described network switching notice, send Access Network information request to access network discovery selection function ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding; Receive the described Access Network information that described ANDSF returns.

According to the first possible implementation of first aspect or first aspect, in the implementation that the third is possible, describedly obtaining Access Network information when switching, comprising: the network switching command receiving user; According to described network switching command, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding; Receive the described Access Network information that described ANDSF returns.

According to the first possible implementation of first aspect or first aspect, in the 4th kind of possible implementation, describedly obtain Access Network information when switching, comprise: the beacon receiving access node, the beacon of described access node comprises the mark of candidate access network corresponding to described access node; According to the network switching command of user, inquire about the congestion information of described access node to described access node; Receive the described Access Network information that described access node returns.

According to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, before the channel quality of at least two access nodes described in described measurement, also comprise: obtain the list of available network provider, described available network provider table comprises the mark of at least one available network provider; The mark of candidate access network corresponding respectively according to described at least two access nodes and the mark of at least one available network provider described, the candidate access network that described in the candidate access network that at least two access nodes described in determining are corresponding respectively, at least one available network provider provides; The channel quality of at least two access nodes described in described measurement, comprising: the channel quality of the access node that the candidate access network that described in measuring, at least one available network provider provides is corresponding.

According to the first possible implementation of first aspect or first aspect, in the 6th kind of possible implementation, describedly obtaining Access Network information when switching, comprising: according to the Link State detected, determining to switch; Send Access Network information request to medium irrelevant information MIIS server, using make described MIIS whois lookup can Access Network inquire about the congestion information of described access node to the access node that described candidate access network is corresponding as described candidate access network; Receive the described Access Network information that described MIIS server returns.

Second aspect, the embodiment of the present invention provides a kind of method for network access a kind of method for network access, comprising: receive the Access Network information request that user equipment (UE) sends; Search described UE can Access Network as the candidate access network of described UE; The congestion information of described access node is inquired about to the access node that described candidate access network is corresponding; Access Network information is returned to described UE, described Access Network information comprises the congestion information of the mark of described candidate access network and access node corresponding to described candidate access network, and the candidate access network selecting access node corresponding according to the congestion information of access node corresponding to described candidate access network and channel quality to make described UE is as objective network and access.

The third aspect, the embodiment of the present invention provides a kind of method for network access, comprising: access node reception congestion query statement; According to described congested query statement, obtain the congestion information of the described access node prestored; The congestion information of described access node is returned.

In the first possible implementation of the third aspect, before the congestion information of the described access node that described acquisition prestores, also comprise: the congestion parameter calculating the every bar data flow in every paths of described access node association; According to the congestion parameter of the every bar data flow in every paths that described access node associates, obtain the congestion information of described access node; Store the congestion information of described access node.

According to the first possible implementation of the third aspect, in the implementation that the second is possible, the congestion parameter of the every bar data flow in every paths of described calculating described access node association, comprise: based on every bar data flow, add up the grouping number be labeled in the grouping of the total number packets of described data flow be currently received and the described data flow be currently received; By the grouping number that is labeled in described data flow divided by the total number packets of described data flow, obtain the congestion parameter of described data flow.

According to the first possible implementation of the third aspect, in the implementation that the third is possible, the congestion parameter of the every bar data flow in every paths of described calculating described access node association, comprising:

Based on every bar data flow, according to the mark situation of the grouping of predetermined number in the current described data flow received, obtain the congestion parameter of described data flow.

According to the first of the third aspect to the third arbitrary possible implementation, in the 4th kind of possible implementation, after the congestion parameter of the every bar data flow in every paths of described calculating described access node association, also comprise: with the time interval of presetting, periodically update the congestion parameter of the every bar data flow in every paths of described access node association.

According to the first of the third aspect to the 4th kind of arbitrary possible implementation, in the 5th kind of possible implementation, described access node reception congestion query statement, comprising: described access node receives the congested query statement that ANDSF, UE or MIIS server sends; The described congestion information by described access node returns, and comprising: the congestion information of described access node is returned to described ANDSF, UE or MIIS server.

Fourth aspect, the embodiment of the present invention provides a kind of subscriber equipment, comprise: acquisition module, for obtaining Access Network information when switching, described Access Network information comprises at least two access nodes mark of candidate access network corresponding respectively and the congestion information of described at least two access nodes; Measurement module, for the channel quality of at least two access nodes described in measuring; Select module, for according to the channel quality of described at least two access nodes and congestion information, the candidate access network that at least two access nodes described in selection, access node is corresponding is as objective network; Access module, for accessing described objective network.

In the first possible implementation of fourth aspect, described selection module comprises: the first chooser module, for the channel quality according to described at least two access nodes, at least two access nodes described in determining, channel quality meets at least one pre-conditioned access node; Second chooser module, for according to the described congestion information meeting at least one pre-conditioned access node, meet candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network from described.

According to the first possible implementation of fourth aspect or fourth aspect, in the implementation that the second is possible, described acquisition module comprises: first receives submodule, for receiving the network switching notice of source Access Network; First sends request submodule, for according to described network switching notice, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding; First receives information submodule, for receiving the described Access Network information that described ANDSF returns.

According to the first possible implementation of fourth aspect or fourth aspect, in the implementation that the third is possible, described acquisition module comprises: second receives submodule, for receiving the network switching command of user; Second sends request submodule, for according to described network switching command, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding; Second receives information submodule, for receiving the described Access Network information that described ANDSF returns.

According to the first possible implementation of fourth aspect or fourth aspect, in the 4th kind of possible implementation, described acquisition module comprises: the 3rd receives submodule, for receiving the beacon of access node, the beacon of described access node comprises the mark of candidate access network corresponding to described access node; 3rd sends request submodule, for the network switching command according to user, inquires about the congestion information of described access node to described access node; 3rd receives information submodule, for receiving the described Access Network information that described access node returns.

According to the 4th kind of possible implementation of fourth aspect, in the 5th kind of possible implementation, also comprise: obtain module, for before the channel quality of at least two access nodes described in described measurement module measurement, obtain the list of available network provider, described available network provider table comprises the mark of at least one available network provider; Identification module, for according to the corresponding respectively mark of candidate access network of described at least two access nodes and the mark of at least one available network provider described, the candidate access network that described in the candidate access network that at least two access nodes described in determining are corresponding respectively, at least one available network provider provides; Correspondingly, the channel quality of the access node of candidate access network of described measurement module specifically for measuring at least one available network provider described and providing.

According to the first possible implementation of fourth aspect or fourth aspect, in the 6th kind of possible implementation, in described acquisition module, comprising: determine switching submodule, for according to the Link State detected, determine to switch; 4th sends request submodule, for sending Access Network information request to MIIS server, using make described MIIS whois lookup can Access Network inquire about the congestion information of described access node to the access node that described candidate access network is corresponding as described candidate access network; 4th receives information submodule, for receiving the described Access Network information that described MIIS server returns.

5th aspect, the embodiment of the present invention provides a kind of server, comprising: receive request module, for receiving the Access Network information request that user equipment (UE) sends; Query candidate Access Network module, for search described UE can Access Network as the candidate access network of described UE; Inquiry congestion information module, inquires about the congestion information of described access node for the access node corresponding to described candidate access network; Return Access Network information module, Access Network information is returned to described UE, described Access Network information comprises the congestion information of the mark of described candidate access network and access node corresponding to described candidate access network, and the candidate access network selecting access node corresponding according to the congestion information of access node corresponding to described candidate access network and channel quality to make described UE is as objective network and access.

6th aspect, the embodiment of the present invention provides a kind of access node, comprising: command reception module, for reception congestion query statement; Congestion information obtains module, for according to described congested query statement, obtains the congestion information of the described access node prestored; Congestion information returns module, for being returned by the congestion information of described access node.

In the first possible implementation of 6th aspect, also comprise: the first computing module, for calculating the congestion parameter of the every bar data flow in every paths of described access node association; Second computing module, for the congestion parameter of the every bar data flow in every paths of associating according to described access node, obtains the congestion information of described access node; Memory module, for storing the congestion information of described access node.

According to the first possible implementation of the 6th aspect, in the implementation that the second is possible, first computing module, comprise: statistics submodule, for based on every bar data flow, the grouping number be labeled in the total number packets of adding up the described data flow be currently received and the grouping of described data flow be currently received; Operator module, for the grouping number that will be labeled in described data flow divided by the total number packets of described data flow, obtains the congestion parameter of described data flow.

According to the first possible implementation of the 6th aspect, in the implementation that the third is possible, first computing module, specifically for: according to the mark situation of the grouping of predetermined number in the current described data flow received, obtain the congestion parameter of described data flow.

According to the first of the 6th aspect to the third arbitrary possible implementation, in the 4th kind of possible implementation, also comprise: update module, for calculate at described first computing module described access node association every paths in every bar data flow congestion parameter after, with the time interval of presetting, periodically update the congestion parameter of the every bar data flow in every paths of described access node association.

According to the first of the 6th aspect to the 4th kind of arbitrary possible implementation, in the 5th kind of possible implementation, described command reception module specifically for: receive the congested query statement that ANDSF, UE or MIIS server sends; Correspondingly, described congestion information return module specifically for: the congestion information of described access node is returned to described ANDSF, UE or MIIS server.

The method for network access that the embodiment of the present invention provides, subscriber equipment, server and access node, subscriber equipment is made to pass through to obtain when switching the congestion information of access node, subscriber equipment is made not only to consider channel quality when select target network, also consider the path congestion situation of network layer, solve in prior art when selecting network to switch and only consider that channel quality causes congested, that network performance is declined problem, improves network performance, improve user and to surf the Net experience.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Figure 1A is the flow chart of method for network access embodiment one of the present invention;

Figure 1B is the schematic flow sheet of a kind of implementation of step 10 in Figure 1A illustrated embodiment one;

Fig. 1 C is the schematic flow sheet of another implementation of step 10 in Figure 1A illustrated embodiment one;

Fig. 1 D is the schematic flow sheet of another implementation of step 10 in Figure 1A illustrated embodiment one;

Fig. 1 E is the schematic flow sheet of the another kind of implementation of step 10 in Figure 1A illustrated embodiment one;

Fig. 2 is the flow chart of method for network access embodiment two of the present invention;

Fig. 3 is the flow chart of method for network access embodiment three of the present invention;

Fig. 4 is the ECN labeling method figure of method for network access of the present invention;

Fig. 5 is the signaling diagram of method for network access embodiment four of the present invention;

Fig. 6 is the signaling diagram of method for network access embodiment five of the present invention;

Fig. 7 is the signaling diagram of method for network access embodiment six of the present invention;

Fig. 8 is the signaling diagram of method for network access embodiment seven of the present invention;

Fig. 9 is the structural representation of subscriber equipment embodiment one of the present invention;

Figure 10 is the structural representation of server example one of the present invention;

Figure 11 is the structural representation of access node embodiment one of the present invention.；

Figure 12 is the structural representation of subscriber equipment embodiment two of the present invention;

Figure 13 is the structural representation of server example two of the present invention;

Figure 14 is the structural representation of access node embodiment two of the present invention.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment one

Figure 1A is the flow chart of method for network access embodiment one of the present invention, the present embodiment is applicable to subscriber equipment (User Equipment when network switches, be called for short UE) how select target network, the method is generally performed by UE, and UE is mobile phone or panel computer etc. such as.The method of the present embodiment can comprise the steps:

Step 10, obtain Access Network information when switching, described Access Network information comprises at least two access nodes mark of candidate access network corresponding respectively and the congestion information of described at least two access nodes.

Wherein, when UE switches between homogenous networks or heterogeneous network, first UE will select the objective network that will switch, usually need first to get Access Network information, obtaining Access Network information refers to when network switches, third generation partner program (Third Generation Partnership Project can be passed through, be called for short 3GPP) access network discovery selection function (the Access Network Discovery and SelectionFunction that proposes, be called for short ANDSF), Institute of Electrical and Electric Engineers (Institute of Electrical andElectronics Engineers, be called for short IEEE) Access Network vlan query protocol VLAN (Access Network Query Protocol in the 802.11u agreement that proposes, be called for short ANQP) or IEEE802.21 agreement in media independent handovers (Media Independent Handover, be called for short MIH) etc. obtain Access Network information.For example, source Access Network before UE switches is universal land radio access web (the EvolvedUniversal Terrestrial Radio Access Network of evolution, be called for short E-UTRAN) long-term evolving network (Long Term Evolution is called for short LTE) in type time, when UE moves in WLAN coverage territory, if UE goes for service at a high speed, can select to switch to WLAN, during switching, UE first reports positional information and other relevant information of oneself to ANDSF, the translational speed of such as UE, the information such as the grade of service of user and present Access type, ANDSF searches the database of ANDSF according to the positional information of UE, find out Access Network alternatively Access Network available in the current region of UE, and the mark of candidate access network is sent to UE, also the congestion information of the access node in candidate access network to be sent to UE simultaneously.

Above-mentioned congestion information refers to the data flow state that the network element in the exit of Explicit Congestion Notification (Explicity Congestion Notification is called for short ECN) management domain is safeguarded.Wherein, ECN management domain is by supporting that the network element of ECN mechanism forms.Such as, the ECN local management territory scope that in ECN management domain, LTE network is corresponding is at packet data gateway (Packet Data Network Gateway, be called for short P-GW) and Access Network evolved base station (evolved Node Base station, be called for short eNB) between, comprise P-GW, gateway (Serving Gateway, be called for short S-GW), mobile management entity (Mobility ManagementEntity, be called for short MME) and eNB.The ECN local management territory that WLAN is corresponding can be divided into two kinds according to the difference of the mode of WLAN accessing Internet: first kind of way, WLAN and LTE is respectively by different path accessing Internets, ECN local management territory scope corresponding to WLAN is between WLAN Internet access gateway and access point (Access Point is called for short AP); The second way, fusion thought Network Based, because WLAN is incredible network for 3GPP network, evolved packet data gateway (Enhanced Packet Data Gateway can be passed through, be called for short ePDG) be connected with P-GW, WLAN is finally by P-GW accessing Internet, and the ECN local management territory scope that under this mode, WLAN is corresponding is between P-GW and AP.In order to obtain the congestion situation in path in ECN local management territory, the network element in the exit in ECN local management territory needs service data stream mode, and the network element in exit is such as the access node such as eNB, AP or wireless router.Congestion information is obtained according to the data flow state that the network element in exit is safeguarded.

The channel quality of at least two access nodes described in step 20, measurement.

Wherein, access node can be eNB, AP or wireless router, and the channel quality of access node is usually by the intensity of the pilot signal of access node, or the signal to noise ratio of access node, or the intensity of the pilot signal of access node and signal to noise ratio characterize.

Step 30, according to the channel quality of described at least two access nodes and congestion information, the candidate access network that in described at least two access nodes, access node is corresponding is as objective network.

Particularly, UE can according to the channel quality of described at least two access nodes, and at least two access nodes described in determining, channel quality meets at least one pre-conditioned access node;

According to the described congestion information meeting at least one pre-conditioned access node, meet candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network from described.

Particularly, the pre-conditioned intensity threshold that can comprise pilot signal, or snr threshold, or the intensity threshold of pilot signal and snr threshold.

Step 40, access described objective network.

The present embodiment, got the congestion information of access node when switching by UE, the access node that Congestion Level SPCC is the lightest is selected in the good access node of channel quality, using candidate access network corresponding for this access node as objective network, UE is made not only to consider channel quality when select target network, also consider the path congestion situation of network layer, solve in prior art when selecting network to switch and only consider that channel quality causes congested, that network performance is declined problem, improves network performance, improve user and to surf the Net experience.

Under a kind of scene, as UE move in the network of LTE and WLAN Double mulch time, be the schematic flow sheet of a kind of implementation of step 10 in Figure 1A illustrated embodiment one with reference to Figure 1B, Figure 1B, step 10 can comprise the following steps:

The network switching notice of step 101, reception source Access Network.

When UE is in the network of LTE and WLAN Double mulch, if decline as the channel quality of the LTE of source Access Network, at this moment UE can receive the network switching notice of source Access Network.

Step 102, according to described network switching notice, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding.

Wherein, ANDSF is a kind of server being arranged on network side, is applicable to heterogeneous network and switches, its Main Function is for UE selects non-3GPP Access Network, non-3GPP Access Network mainly WLAN, ANDSF can obtain available heterogeneous network resource, for UE provides Access Network information.UE sends Access Network information request to ANDSF, the community ID of community, UE place in the Access Network of source is comprised in this Access Network information request, ANDSF is according to some performance parameters of this community ID and UE, the such as parameter such as dump energy, permission access module, search the mark of available Access Network and available Access Network, using available Access Network as described candidate access network and to access node corresponding to described candidate access network, be such as all AP under WLAN covers or wireless router, inquire about the congestion information of described access node.The congestion information of described access node specifically refers to the congestion information on the path that described access node is corresponding.

Step 103, receive the described Access Network information that described ANDSF returns.

Wherein, described Access Network information comprises the mark of candidate access network corresponding at least two access nodes and the congestion information of described at least two access nodes.

Under another scene, as UE moves in the network of LTE and WLAN Double mulch, even if can satisfy the demand as the LTE channel quality of source Access Network, UE is in order to obtain high speed data communication services, also can be switched in WLAN, in such a scenario, with reference to figure 1C, Fig. 1 C is the schematic flow sheet of another implementation of step 10 in Figure 1A illustrated embodiment one, and step 10 can comprise the following steps:

Step 101 ', receive the network switching command of user.

Step 102 ', according to described network switching command, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding.

Step 103 ', receive the described Access Network information that described ANDSF returns.

In the scheme of this scene, obtained the congestion information of the access node of candidate access network by existing ANDSF in network, do not increase to make in additional network elements situation UE can at select target Access Network time not only consider that the channel quality of access node also considers the congestion situation of access node.

IEEE802.11u agreement provides network automatically to select and switches, and makes UE can be connected to network conveniently by access node, thus obtains convenient, seamless and safe service.Under the scene meeting IEEE802.11u agreement, be the schematic flow sheet of another implementation of step 10 in Figure 1A illustrated embodiment one with reference to figure 1D, Fig. 1 D, step 10 can comprise the following steps:

The beacon of step 104, reception access node, the beacon of described access node comprises the mark of candidate access network corresponding to described access node.

Wherein, when in the region that UE moves to the covering of one or more access node, UE can receive the beacon that in region, access node periodically sends, beacon package contains the mark of Access Network corresponding to access node, usually, beacon also indicates access node whether to support 802.11u, if support, UE can automatically switch, namely in step 40, UE accesses described objective network automatically, if do not support, UE carrys out completing steps 40 according to the operational order of user.

Step 105, network switching command according to user, inquire about the congestion information of described access node to described access node.

Wherein, UE can use universal advertisement services (Generic Advertisement Service is called for short GAS) to send an ANQP inquiry, to inquire about the congestion information of access node to access node.Here access node can be AP also can be wireless router.

Step 106, receive the described Access Network information that described access node returns.

Wherein, access node can provide described Access Network information by ANQP response to UE, described Access Network information comprises the mark of candidate access network corresponding to access node and the congestion information of access node, can also comprise the information such as the network provider identifier of candidate access network corresponding to access node further.

Further, after step 106, before step 20, can also comprise the following steps:

Obtain the list of available network provider, described available network provider table comprises the mark of at least one available network provider;

The mark of candidate access network corresponding respectively according to described at least two access nodes and the mark of at least one available network provider described, the candidate access network that described in the candidate access network that at least two access nodes described in determining are corresponding respectively, at least one available network provider provides.

Accordingly, step 20 can comprise: the channel quality measuring the access node of the candidate access network that at least one available network provider described provides.Such as measure the channel quality of pilot signal strength as this access node of access node.

Particularly, the list of available network provider can be obtained from local certificate.If have two and above candidate access network, and belong to different network providers, UE can select the candidate access network of the network provider that priority is the highest according to preset strategy, and measures the channel quality of the access node at this candidate access network place.

In the scheme of this scene, UE obtains the congestion information of access node from access node by ANPQ inquiry, and determine the access node that will access according to channel quality and congestion information, thus network congestion after avoiding only causing according to signal strength signal intensity access in prior art access.

In another kind of scene, during as carried out heterogeneous network switching between WLAN and LTE based on IEEE802.21 agreement, be the schematic flow sheet of the another kind of implementation of step 10 in Figure 1A illustrated embodiment one with reference to figure 1E, Fig. 1 E, step 10 can comprise the following steps:

The Link State that step 107, basis detect, determines to switch.

Particularly, UE periodically can detect Link State, when Link State reaches the switching condition preset, determines to switch.

Step 108, send Access Network information request to MIIS server, using make described MIIS whois lookup can Access Network to inquire about the congestion information of described access node as described candidate access network and to the access node of described candidate access network.

Wherein, MIIS server is media independent handover (Media Independent Handoff, MIH) important component part in, MIH is formulated by IEEE802.21 working group, it is the specification of seamless switching between heterogeneous network, MIH is widely used, and has both been applicable to 3GPP network and has switched to non-3 GPP network, is also suitable for non-3 GPP network and switches to 3GPP network.The information of neighbor networks is stored, the mark of such as neighbor networks, subnet prefix, the information such as IP configuration information and network coverage in the database of MIIS server.MIIS server searches available Access Network alternatively Access Network inquire about the congestion information of described access node to the access node that described candidate access network is corresponding from neighbor networks.

Step 109, receive the described Access Network information that described MIIS server returns.

In the scheme of this scene, UE obtains the congestion information of access node by MIIS server existing in network, does not increase extra network element, is easy to realize.

Embodiment two

Fig. 2 is the flow chart of method for network access embodiment two of the present invention, and the method is generally performed by server, and the method for the present embodiment can comprise the steps:

The Access Network information request that step 50, reception UE send.

Wherein, server, such as MIIS server or ANDSF, receive the Access Network information request that UE sends, wherein comprise UE current location in Access Network information request, the information such as present Access type.

Step 60, search described UE can Access Network as the candidate access network of described UE;

Wherein, the information in the Access Network information request that server sends according to UE, such as UE current location, the information such as present Access type, search available Access Network alternatively Access Network.

Step 70, inquire about the congestion information of described access node to the access node that described candidate access network is corresponding.

Wherein, the access node of candidate access network can be base station, AP or wireless router, and access node is the network element in ECN management domain exit, stores the congestion information on each path that this access node is connected.

Step 80, return Access Network information to described UE, described Access Network information comprises the congestion information of the mark of at least two candidate access network and access node corresponding to described at least two candidate access network, and the candidate access network selecting access node corresponding according to the congestion information of access node corresponding to described candidate access network and channel quality to make described UE is as objective network and access.

Wherein, server returns Access Network information to described UE, make UE according to the mark of candidate access network, first corresponding to each candidate access network access node carries out the measurement of channel quality, then meets candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network at channel quality.

The present embodiment, server is by returning to subscriber equipment by the congestion information obtaining access node corresponding to candidate access network, to make subscriber equipment according to channel quality and to carry out select target Access Network in conjunction with congestion information, thus avoid the problem only causing the rear network congestion of access in prior art according to channel quality select target Access Network.

Embodiment three

Fig. 3 is the flow chart of method for network access embodiment three of the present invention, and the present embodiment is performed by access node, comprises the following steps:

Step 301, access node reception congestion query statement.

Wherein, access node can be eNB, AP or wireless router, and congested query statement is generally sent by server or UE.

Step 302, according to described congested query statement, obtain the congestion information of described access node prestored.

Particularly, the congestion information of the described access node prestored generally can for the congestion information stored in the memory cell of access node self, and memory cell is such as internal memory also can be other memories.

Step 303, the congestion information of described access node to be returned.

Wherein, the congestion information of described access node is first returned to server and returns to subscriber equipment by server again by access node, or directly return to subscriber equipment, to make subscriber equipment according to described congestion information, in the good access point of channel quality, choose the candidate access network that the lightest access point of Congestion Level SPCC is corresponding.

In the present embodiment, the congestion information that access node prestores, and be sent back to subscriber equipment to make subscriber equipment according to channel quality and to select access point to access candidate access network corresponding to this access point in conjunction with congestion information, thus subscriber equipment is avoided only to cause the network congestion after access according to channel quality access.

Further, in the above-described embodiments, before step 302, further comprising the steps of:

Calculate the congestion parameter of the every bar data flow in every paths of described access node association;

According to the congestion parameter of the every bar data flow in every paths that described access node associates, obtain the congestion information of described access node;

Store the congestion information of described access node.

Wherein, in ECN management domain, ECN mark is performed by the router in management domain, described router comprises the wireless router as access node, also comprise wireless router and the general router of non-access node, when queue length in the buffer memory of described router exceedes threshold value, described router arrives each grouping in the data flow of described router with certain proportion mark, the ratio of mark is relevant with queue length and threshold value, and choosing of threshold value is relevant to concrete network environment.

Set up ECN local management territory and stream mode management function (per-flow statemanagement function, FSMF) is set in exit, territory.At the eNB of LTE network and the AP of wlan network or arrange FSMF as the wireless router of access node, the effect of FSMF is the congestion situation obtained from grouping in the exit in ECN local management territory in respective path, calculates the path congestion parameter of access node connected network through congestion parameter.

This programme is described for router, and exceed can prescribe a time limit under mark queue length at router queue, mark grouping, as shown in Figure 4, Fig. 4 is the ECN labeling method figure of method for network access of the present invention to the relation of packet marking ratio and queue length.Ratio shared by mark packets can the congestion situation of reaction network, and the higher then network congestion of ratio is more serious.

Detailed process is: the queue length in the buffer memory of router exceedes minimum mark threshold value q _min, router can first by checking that the ECN identification field of grouping judges whether to support ECN.If support ECN, mark arriving the grouping of router according to ECN administrative mechanism, the ratio of mark increases along with the increase of queue length, when queue length exceedes most protrude mark threshold values q _max, time, then with probability 100% mark packets.During queue overflow, start to abandon grouping.If do not support ECN, the grouping arriving router is not marked.

The concrete grammar of ECN mark is the ECN identification field creating 2 bit (bit) at the head of grouping, can represent 4 ECN marks, from " 00 " to " 11 ".ECN identifies " 01 " and " 10 ", and these two kinds all represent " supporting ECN ", and concrete use " 01 " or " 10 " is determined by the agreement used.ECN identifies " 00 " expression and " does not support ECN ".ECN mark " 11 " represents by other router marking.In ECN mechanism, router detection is designated the grouping of " 01 " or " 10 " to ECN, namely think and support ECN mechanism, according to labeling method in Fig. 4, the ECN of grouping is designated " 11 ", access node calculates congestion parameter according to the ECN mark of grouping when receiving grouping, and the ECN of described grouping identifies the grouping of router marking and the grouping of self marker before meter comprises.

The method arranging ECN identification field in different IP agreement is different, such as, COS (Type of service is called for short ToS) totally 8, territory in IPv4 leader, namely 0 to 7, wherein the 6th and the 7th is set to ECN territory, namely in ToS territory first 6 be Differentiated Services type (DSCP) to the 5th from 0.

When using ECN mechanism, entrance in ECN territory and exit service data stream mode, use five-tuple in data flow usually, i.e. source IP address, object IP address, source port number, destination slogan and agreement ID, can identify a stream uniquely, agreement ID refers to the mark of TCP or UDP.In FSMF, according to the mark situation of the grouping of this access node of arrival, the congestion situation in each data flow respective path can be obtained.The access node of ECN management domain outlet is at self storage unit stores data stream mode Maintenance Table, and data flow state Maintenance Table is as shown in table 1.In units of data flow, grouping is added up, obtain the congestion state in path in territory.

Table 1 data flow state Maintenance Table

Source address: port numbers	Destination address: port numbers	Congestion parameter
			Src_ip_addr1:port1	Dst_ip_addr1:port1	P1
Src_ip_addr2:port2	Dst_ip_addr2:port2	P2
			......	......	......

In table 1, P1 and P2 is congestion parameter corresponding to two data flow.

Alternatively, step 304 can comprise the following steps:

Based on every bar data flow, add up the grouping number be labeled in the grouping of the total number packets of described data flow be currently received and the described data flow be currently received;

By the grouping number that is labeled in described data flow divided by the total number packets of described data flow, obtain the congestion parameter of described data flow.

Illustrate, as follows:

Two counter Counter_r [i] for data flow i are set in ECN management domain outlet network element, Counter_m [i].Counter_r [i] records the total number packets of the data flow i received, and Counter_m [i] record receives the grouping number be labeled in the grouping of data flow i, and the congestion parameter Pi that data flow i is corresponding is calculated as follows:

Pi＝Counter_m[i]/Counter_r[i] （1）

Alternatively, step 304 can comprise the following steps:

Based on every bar data flow, according to the mark situation of the grouping of predetermined number in the current described data flow received, obtain the congestion parameter of described data flow.

Specific as follows:

When i-th data flow jth grouping arrives, the congestion parameter of i-th data flow represents with p [i, j], supposes that predetermined number is n, then obtain congestion parameter according to the mark situation of n grouping before a jth grouping, concrete formula is as follows:

$p[i,j]=\frac{1}{n}{\mathrm{\Σ}}_{k=j-n}^{j}m[i,k]---\left(2\right)$

According to formula (2), when obtaining i-th data flow jth+1 grouping arrival, the congestion parameter p [i, j+1] of i-th data flow is expressed as follows:

$p[i,j+1]=\left\{\begin{array}{cc}\frac{1}{j+1}{\mathrm{\&Sigma;}}_{k=1}^{j+1}m[i,k]\&ap;\frac{1}{j+1}m[i,j+1]+\frac{j}{j+1}p[i,j]& ,1\&le;j<n-1\\ \frac{1}{n}{\mathrm{\&Sigma;}}_{k=j-n+1}^{j+1}m[i,k]\&ap;\frac{1}{n}m[i,j+1]+\frac{n-1}{n}p[i,j]& ,j\&GreaterEqual;n-1\end{array}\right.---\left(3\right)$

Wherein show when the ECN of this grouping is designated " 11 " to be labeled (marked) in formula (2) and (3), m [i, j] value is 1, and when the ECN of this grouping is designated other (other), m [i, j] value is 0, namely

$m[i,j]=\left\{\begin{array}{cc}1& \mathrm{marked}\\ 0& \mathrm{other}\end{array}\right.---\left(4\right)$

Such as predetermined number n=4, p [1,1]=m [1,1] time initial, when namely the 1st grouping arrives, p [1,1]=m [1,1];

When 2nd grouping arrives, $p\left[\mathrm{1,2}\right]=\frac{1}{2}p\left[\mathrm{1,1}\right]+\frac{1}{2}m\left[\mathrm{1,2}\right];$

When 3rd grouping arrives, $p\left[\mathrm{1,3}\right]=\frac{2}{3}p\left[\mathrm{1,2}\right]+\frac{1}{3}m\left[\mathrm{1,3}\right];$

When 4th grouping arrives, $p[1,4]=\frac{3}{4}p\left[\mathrm{1,3}\right]+\frac{1}{4}m\left[\mathrm{1,4}\right];$

When 5th grouping arrives, $p\left[\mathrm{1,5}\right]=\frac{3}{4}p\left[\mathrm{1,4}\right]+\frac{1}{4}m\left[\mathrm{1,5}\right];$

When 6th grouping arrives, $p\left[\mathrm{1,6}\right]=\frac{3}{4}p\left[\mathrm{1,5}\right]+\frac{1}{4}m\left[\mathrm{1,6}\right];$

When 7th grouping arrives, $p\left[\mathrm{1,7}\right]=\frac{3}{4}p\left[\mathrm{1,6}\right]+\frac{1}{4}m\left[\mathrm{1,7}\right];$

When 8th grouping arrives, $p\left[\mathrm{1,8}\right]=\frac{3}{4}p\left[\mathrm{1,7}\right]+\frac{1}{4}m\left[\mathrm{1,8}\right];$

When 9th grouping arrives, $p\left[\mathrm{1,9}\right]=\frac{3}{4}p\left[\mathrm{1,8}\right]+\frac{1}{4}m\left[\mathrm{1,9}\right];$

When 10th grouping arrives, $p\left[\mathrm{1,10}\right]=\frac{3}{4}p\left[\mathrm{1,9}\right]+\frac{1}{4}m\left[\mathrm{1,10}\right]$

The like, adopt iterative method to obtain the congestion parameter of described data flow when jth+1 grouping arrives.

Associate the congestion parameter of each data flow on each path according to this access node, then obtain the congestion information of this access node through aggregate statistics, wherein said aggregate statistics can be conventional statistical method.

On such scheme basis, after the congestion parameter of the every bar data flow in every paths of described calculating described access node association, with the time interval of presetting, the congestion parameter of the every bar data flow in every paths of described access node association can be periodically updated.Such as, congestion parameter can be calculated according to formula (1) with certain hour interval T, calculate after congestion parameter and the congestion parameter stored in updating form 1; Or calculate congestion parameter in real time according to formula (2), and the congestion parameter stored in T updating form 1 at a certain time interval.The congestion information of this access node is obtained again through aggregate statistics.

On such scheme basis, step 301, can comprise:

Described access node receives the congested query statement that ANDSF, UE or MIIS server sends;

Corresponding step 303 can comprise:

The congestion information of described access node is returned to described ANDSF, UE or MIIS server.

Particularly, when the congested query statement in step 301 is ANDSF transmission, in step 303, congestion information is returned to ANDSF.When the congested query statement in step 301 is UE transmission, in step 303, congestion information is returned to UE.When the congested query statement in step 301 is the transmission of MIIS server, in step 303, congestion information is returned to MIIS server.

Embodiment four

Fig. 5 is the signaling diagram of method for network access embodiment four of the present invention, and the present embodiment is applicable to UE and switches to non-3 GPP network from 3GPP.For example, UE moves in the network of LTE and WLAN Double mulch, and UE can be switched in WLAN to obtain high speed data communication services.In WLAN, user density is higher; in order to realize load balancing; multiple WLAN access node can be set usually; on above-described embodiment basis, UE needs the signal quality of the access node to candidate access network to measure before the handover; the WLAN that the lightest access node access of Congestion Level SPCC is corresponding with this access node is chosen in the good access node of channel quality; concrete signaling process, with reference to figure 5, only draws access node corresponding to a candidate access network for convenience of description in Fig. 5, i.e. an AP.

Step 401, UE and ANDSF set up security signaling link.

First, UE trigger network switches, and UE first obtains the address of ANDSF when switching, then sets up security signaling link according to the address of ANDSF and ANDSF.

Step 402, UE send Access Network information request to ANDSF.

When UE receives the network switching notice of source Access Network or receives the network switching command of user, UE initiates Access Network information request to ANDSF, the positional information reporting oneself current in Access Network information request and self relevant information, such as UE translational speed, user obtain the grade, present Access type etc. of service.

Step 403, ANDSF send congested inquiry to AP.

Wherein ANDSF responds the Access Network information request that UE sends, and the database searched according to the UE positional information in Access Network information request in ANDSF, find out the access networks available alternatively Access Network in the current region of UE, each access node AP to each candidate access network sends " congested inquiry " signaling to inquire about the congestion information of each access node.

Step 404, AP send inquiry response to ANDSF.

After each access node AP of each candidate access network receives congested inquiry signaling, by the congestion information that self stores, send to ANDSF by inquiry response.

Step 405, ANDSF send Access Network information response to UE.

ANDSF receives the inquiry response that AP sends, and sends Access Network information response to UE.

Wherein, the mark of candidate access network corresponding to each AP and the congestion information of each AP is comprised in Access Network information response.

Step 406, UE select target network.

UE measures the channel quality of each AP, in the good AP of channel quality, selects the AP that Congestion Level SPCC is the lightest, using candidate access network corresponding for this AP as objective network after receiving Access Network information response.

Step 407, UE enter switching flow.

Particularly, UE determined access node from step 406 is switched to objective network.

The present embodiment, by congested inquiry and congested response, UE is made to acquire the congestion information of access node, UE selects the lightest access node of Congestion Level SPCC occurs in the good access node of channel quality, objective network is switched to by this access node, thus obtain good Consumer's Experience, and reduce network congested possibility occurs.And congested inquiry and congested response signaling are completed by ANDSF, do not increase extra network element, reduce cost.

Embodiment five

Fig. 6 is the signaling diagram of method for network access embodiment five of the present invention.The present embodiment is based on 802.11u agreement, and access node is responded by ANQP inquiry and ANQP and the mark of candidate network and congestion information are sent back to UE, and UE switches according to the channel quality of candidate network and congestion information determination objective network.In 802.11u agreement, UE not only needs inquiry available network and congested inquiry, also will carry out identification, namely determine the access node of this access node network provider whether this UE supports.Detailed process is as follows:

Step 501, UE trigger switching.

When supporting that the UE of 802.11u enters the WLAN region of one or more access node covering for one, UE can receive these access nodes, normally AP, with reference to AP1 in figure 5, AP2 and AP3, the beacon that cycle sends, beacon package contains the mark of Access Network corresponding to AP, and UE determines to switch according to the operation of user.

Step 502, UE send ANQP inquiry to each AP.

Wherein, ANQP inquiry is mainly used in obtaining Access Network information, to inquire about the congestion information of AP.

Step 503, each AP respond to UE foldback ANQP.

ANQP response provides the congestion information of each AP.

Step 504, UE select target network.

Particularly, the list of available network provider is obtained from the local certificate of UE, the mark of candidate access network corresponding respectively according to described each AP and the mark of available network provider, the candidate access network that described in the candidate access network that at least two AP described in determining are corresponding respectively, at least one available network provider provides.

If have two and above AP, and from different network providers, UE selects the candidate access network of the network provider that priority is the highest according to preset strategy.

UE measures the channel quality of the AP of the candidate access network that at least one available network provider described provides, and the candidate access network selecting AP that Congestion Level SPCC is the lightest corresponding is as target access network.

Step 506, UE switch to objective network.

The present embodiment, obtains congestion information by ANQP inquiry, when not increasing additional network elements and signaling, making UE acquire congestion information, reducing the cost of congested inquiry.

Embodiment six

Fig. 7 is the signaling diagram of method for network access embodiment six of the present invention.The present embodiment, based on MIH, is applicable to UE and switches to LTE from WLAN, and namely candidate access network is LTE.The unit such as Media Independent Handover function (Media Independent Handover is called for short MIHF), MIHF User, WLAN medium education (Media Access Control is called for short MAC) and LTE MAC are divided into according to function in UE.MIHF is as an intermediate layer between network layer and link layer, and primary responsibility management information and signaling mutual, makes the signaling of switching and perform switching.MIHF User refers to the entity using MIHF service, is the mobile management module in UE, the disconnection of primary responsibility subscriber equipment and network be connected.WLAN MAC is responsible for processing the MAC layer signaling relevant with WLAN, and LTE MAC is responsible for processing the MAC layer signaling relevant with LTE.Detailed process is with reference to figure 7, and for convenience of description, only draw an eNB in the access node eNB of each candidate access network in Fig. 7, represent with LTE eNB, the access node AP of WLAN represents with WLAN AP.

WLAN MAC in step 601:UE sends Link_Parameter_Change to MIHF.

Wherein, UE periodically can detect Link State, and the WLAN MAC of UE sends link parameter change Link_Parameter_Change when link-state change particularly.

Step 602:MIHF sends MIH_Link_Parameter_Report to MIHF User.

The effect of MIH link parameter report MIH_Link_Parameter_Report is to MIHF User report link state, and prompting MIHF User reaches the switching condition preset, and prepares to switch.

Step 603:MIHF User sends Link_Get_Infomation_Request by MIHF to MIIS server.

The effect of link obtaining information request Link_Get_Infomation_Request is request Access Network information.

Step 604:MIIS server sends Congestion_Information_Requery to the access node LTE eNB of each candidate access network.

The effect of congestion information inquiry Congestion_Information_Requery is the congestion information of requesting query access node.

Step 605: the access node LTE eNB of each candidate access network returns Congestion_Information_Response to MIIS server,

The congestion information response Congestion_Information_Response that LTE eNB returns to MIIS server comprises the mark of candidate access network corresponding to LTE eNB and the congestion information of LTE eNB.

Step 606:MIIS server sends Link_Get_Infomation_response by MIHF to MIHF User.

Link obtaining information response Link_Get_Infomation_response comprises mark and the congestion information of candidate access network corresponding to each LTE eNB.

Step 607:MIHF User select target network.

Particularly, UE is according to the mark of candidate access network corresponding to each LTE eNB and congestion information determination objective network.

The WLAN MAC of step 608:UE sends Link_Going_Down to MIHF.

Particularly, the WLAN MAC of UE, when monitoring Link State and continuing to worsen, sends link to MIHF and is about to disconnect Link_Going_Down, prepares to disconnect wlan network to point out MIHF.

Step 609:MIHF sends MIH_Link_Going_Down to MIHF User.

The effect that MIH link is about to disconnect MIH_Link_Going_Down is that prompting MIHF User prepares to disconnect wlan network.

Step 610:MIHF User initiates to switch.

Particularly, MIHF User is first connected to LTE network, rear disconnection wlan network.Wherein, WALN MAC sends to the disconnection of MIHF transmission link Link_Down, MIHF to MIHF User after the disconnection of MIH link MIH_Link_Down, MIHF User receives MIH_Link_Down and disconnects with WLAN.

The present embodiment, by Congestion_Information_Requery and Congestion_Information_Response, make UE can obtain the congestion information of candidate network, solve the network congestion problem that prior art only causes according to channel quality select target network.

Embodiment seven

Fig. 8 is the signaling diagram of method for network access embodiment seven of the present invention.The present embodiment, based on MIH, is applicable to UE and switches to WLAN from LTE.The process that UE switches to wlan network, with similar to LTE network handoff procedure.MIIS server is by the congestion information of congested inquiry signaling to path in WLAN access node inquiry access node mark and the ECN management domain that is connected with access node.The present embodiment is for WLAN access node for AP is described, and detailed process is with reference to being that example is described with an AP in the access node AP of each candidate access network, the WLAN AP namely in Fig. 8 in figure 8, Fig. 8.

Step 701, MIHF user send Link_Get_Infomation_request by MIHF to MIIS server.

Wherein, when UE enters into WLAN coverage territory, in order to obtain better service, general user initiatively initiates the switching to WLAN, and at this moment MIHF user sends Link_Get_Infomation_request by MIHF to MIIS server, request Access Network information.

Step 702, MIIS server send Congestion_Information_Requery to WLAN AP.

The effect of Congestion_Information_Requery is the mark and the congestion information that obtain candidate access network corresponding to WLAN AP.

Step 703, WLAN AP return Congestion_Information_Response to MIIS server.

WLAN AP comprises mark and the congestion information of candidate access network corresponding to AP to the Congestion_Information_Response that MIIS server returns.

Step 704, MIIS server send Link_Get_Infomation_response by MIHF to MIHF User.

Wherein, Link_Get_Infomation_response comprises mark and the congestion information of candidate access network corresponding to AP.

Step 705, MIHF User select target network.

Step 706, UE are connected to WLAN, disconnect LTE link.

The present embodiment used Congestion_Information_Requery and Congestion_Information_Response to make UE can obtain the congestion information of candidate network, solved the network congestion problem that prior art only causes according to channel quality select target network.

Embodiment eight

Fig. 9 is the structural representation of subscriber equipment embodiment one of the present invention, and this subscriber equipment comprises: acquisition module 11, measurement module 12, selection module 13 and access module 14.

Wherein, acquisition module 11, for obtaining Access Network information when switching, described Access Network information comprises at least two access nodes mark of candidate access network corresponding respectively and the congestion information of described at least two access nodes;

Measurement module 12, for the channel quality of at least two access nodes described in measuring;

Select module 13, for according to the channel quality of described at least two access nodes and congestion information, the candidate access network that at least two access nodes described in selection, access node is corresponding is as objective network;

Access module 14, for accessing described objective network.

Further, described selection module 13 comprises: the first chooser module and the second chooser module.

Wherein, the first chooser module, for the channel quality according to described at least two access nodes, at least two access nodes described in determining, channel quality meets at least one pre-conditioned access node;

Second chooser module, for according to the described congestion information meeting at least one pre-conditioned access node, meet candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network from described.

Described acquisition module 11 comprises: first receives submodule, first sends request submodule and the first reception information submodule.Above-mentioned three submodules are used for when UE moves in the network of LTE and WLAN Double mulch, if decline as the channel quality of the LTE of source Access Network, subscriber equipment receives the scene of the network switching notice of source Access Network.

Particularly, first receives submodule, for receiving the network switching notice of source Access Network;

First sends request submodule, for according to described network switching notice, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

First receives information submodule, for receiving the described Access Network information that described ANDSF returns.

Further, described acquisition module 11 comprises: second receives submodule, second sends request submodule and the second reception information submodule.Above-mentioned three submodules are used for when UE moves in the network of LTE and WLAN Double mulch, even if can satisfy the demand as the LTE channel quality of source Access Network, UE, in order to obtain high speed data communication services, is switched to the scene of WLAN.

Wherein, second receives submodule, for receiving the network switching command of user;

Second sends request submodule, for according to described network switching command, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

Second receives information submodule, for receiving the described Access Network information that described ANDSF returns.

Described acquisition module 11 comprises: the 3rd receives submodule, the 3rd sends request submodule and the 3rd reception information submodule.Above-mentioned three submodules are for meeting the scene of IEEE802.11u agreement.

Wherein, the 3rd receives submodule, and for receiving the beacon of access node, the beacon of described access node comprises the mark of candidate access network corresponding to described access node;

3rd sends request submodule, for the network switching command according to user, inquires about the congestion information of described access node to described access node;

3rd receives information submodule, for receiving the described Access Network information that described access node returns.

On such scheme basis, subscriber equipment also comprises: obtain module and identification module.

Obtain module, for before the channel quality of at least two access nodes described in described measurement module measurement, obtain the list of available network provider, described available network provider table comprises the mark of at least one available network provider.

Identification module, for according to the corresponding respectively mark of candidate access network of described at least two access nodes and the mark of at least one available network provider described, the candidate access network that described in the candidate access network that at least two access nodes described in determining are corresponding respectively, at least one available network provider provides.

Correspondingly, under this scene, the channel quality of the access node of candidate access network of described measurement module 12 specifically for measuring at least one available network provider described and providing.

Further, in described acquisition module 11, can comprise: determine that switching submodule, the 4th sends request submodule and the 4th and receives information submodule.Above-mentioned three submodules are used between WLAN and LTE, carrying out heterogeneous network handoff scenario based on IEEE802.21 agreement.

Wherein, determine switching submodule, for according to the Link State detected, determine to switch;

4th sends request submodule, for sending Access Network information request to MIIS server, using make described MIIS whois lookup can Access Network inquire about the congestion information of described access node to the access node that described candidate access network is corresponding as described candidate access network;

4th receives information submodule, for receiving the described Access Network information that described MIIS server returns.

The subscriber equipment that the present embodiment provides can perform the method for network access of embodiment one, and it possesses corresponding function and beneficial effect, repeats no more herein.

Embodiment nine

Figure 10 is the structural representation of server example one of the present invention, and this server comprises: receive request module 21, query candidate Access Network module 22, inquiry congestion information module 23 and return Access Network information module 24.

Wherein, receive request module 21, for receiving the Access Network information request that user equipment (UE) sends;

Query candidate Access Network module 22, for search described UE can Access Network as the candidate access network of described UE;

Inquiry congestion information module 23, inquires about the congestion information of described access node for the access node corresponding to described candidate access network;

Return Access Network information module 24, Access Network information is returned to described UE, described Access Network information comprises the congestion information of the mark of described candidate access network and access node corresponding to described candidate access network, and the candidate access network selecting access node corresponding according to the congestion information of access node corresponding to described candidate access network and channel quality to make described UE is as objective network and access.

The server that the present embodiment provides can perform the method for network access of embodiment two, and it possesses corresponding function and beneficial effect, repeats no more herein.

Embodiment ten

Figure 11 is the structural representation of access node embodiment one of the present invention, and this access node comprises: command reception module 31, congestion information obtain module 32 and congestion information returns module 33.

Command reception module 31, for reception congestion query statement;

Congestion information obtains module 32, for according to described congested query statement, obtains the congestion information of the described access node prestored;

Congestion information returns module 33, for being returned by the congestion information of described access node.

Further, described access node, also comprises: the first computing module, the second computing module and memory module.

First computing module, for calculating the congestion parameter of the every bar data flow in every paths of described access node association;

Second computing module, for the congestion parameter of the every bar data flow in every paths of associating according to described access node, obtains the congestion information of described access node;

Memory module, for storing the congestion information of described access node.

First computing module, comprising: statistics submodule and operator module.

Statistics submodule, for based on every bar data flow, the grouping number be labeled in the total number packets of adding up the described data flow be currently received and the grouping of described data flow be currently received;

Operator module, for the grouping number that will be labeled in described data flow divided by the total number packets of described data flow, obtains the congestion parameter of described data flow.

Further, the first computing module, can be specifically for: according to the mark situation of the grouping of predetermined number in the current described data flow received, obtain the congestion parameter of described data flow.

For making the congestion parameter energy real-time update of described data flow, update module can also be comprised, for calculate at described first computing module described access node association every paths in every bar data flow congestion parameter after, with the time interval of presetting, periodically update the congestion parameter of the every bar data flow in every paths of described access node association.

On such scheme basis, described command reception module specifically for: receive the congested query statement that ANDSF, UE or MIIS server sends;

Correspondingly, described congestion information return module specifically for: the congestion information of described access node is returned to described ANDSF, UE or MIIS server.

The access node that the present embodiment provides can perform the method for network access of embodiment three, and it possesses corresponding function and beneficial effect, repeats no more herein.

Figure 12 is the structural representation of subscriber equipment embodiment two of the present invention, and with reference to Figure 12, subscriber equipment comprises communication interface 41, memory 42 and at least one processor 43.Processor 43, memory 42 and communication interface 41 are connected by bus and complete mutual communication.Described bus can be industrial standard architecture bus (Industrial Standard Architecture, be called for short ISA), peripheral hardware interconnect standard (Peripheral Component Interconnect is called for short PCI) bus or extended industry-standard architecture (Extended Industry Standard Architecture, abbreviation EISA) bus etc.Described bus can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Figure 12, but not representing the bus only having a bus or a type.Wherein, communication interface 41 can be network interface, USB (Universal Serial BUS, being called for short USB) interface, radio frequency unit, antenna, Wireless Fidelity (Wireless Fidelity, be called for short wi-fi) communication module etc. can realize device or the unit of data transmit-receive function.Processor 43 may be a central processing unit (CentralProcessing Unit, referred to as CPU), or specific integrated circuit (Application SpecificIntegrated Circuit, referred to as ASIC), or be configured to the one or more integrated circuits implementing the embodiment of the present invention.Memory 42 is for stores executable programs code, and this program code comprises computer-managed instruction.Memory 42 may comprise high-speed random access memory (Random-AccessMemory is called for short RAM), still may comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.Comprising multiple memory cell, for storing data, and storing executable program code in partial memory cell.

In one embodiment, processor 43 runs the program corresponding with described executable program code by reading the executable program code stored in memory 42, for:

Obtain Access Network information when switching, described Access Network information comprises at least two access nodes mark of candidate access network corresponding respectively and the congestion information of described at least two access nodes;

The channel quality of at least two access nodes described in measurement;

According to channel quality and the congestion information of described at least two access nodes, the candidate access network that at least two access nodes described in selection, access node is corresponding is as objective network;

Access described objective network.

Wherein, the channel quality of at least two access nodes described in described basis and congestion information, the candidate access network that at least two access nodes described in selection, access node is corresponding comprises as objective network:

According to the channel quality of described at least two access nodes, at least two access nodes described in determining, channel quality meets at least one pre-conditioned access node;

According to the described congestion information meeting at least one pre-conditioned access node, meet candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network from described.

Particularly, describedly obtaining Access Network information when switching, comprising:

The network switching notice of reception source Access Network;

According to described network switching notice, send Access Network information request to access network discovery selection function ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

Receive the described Access Network information that described ANDSF returns.

Particularly, describedly obtaining Access Network information when switching, comprising:

Receive the network switching command of user;

According to described network switching command, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

Receive the described Access Network information that described ANDSF returns.

Further, describedly obtaining Access Network information when switching, comprising:

Receive the beacon of access node, the beacon of described access node comprises the mark of candidate access network corresponding to described access node;

According to the network switching command of user, inquire about the congestion information of described access node to described access node;

Receive the described Access Network information that described access node returns.

Before the channel quality of at least two access nodes described in described measurement, also comprise:

Obtain the list of available network provider, described available network provider table comprises the mark of at least one available network provider;

The mark of candidate access network corresponding respectively according to described at least two access nodes and the mark of at least one available network provider described, the candidate access network that described in the candidate access network that at least two access nodes described in determining are corresponding respectively, at least one available network provider provides;

The channel quality of at least two access nodes described in described measurement, comprising:

The channel quality of the access node that the candidate access network that described in measuring, at least one available network provider provides is corresponding.

Describedly obtaining Access Network information when switching, comprising:

According to the Link State detected, determine to switch;

Send Access Network information request to medium irrelevant information MIIS server, using make described MIIS whois lookup can Access Network inquire about the congestion information of described access node to the access node that described candidate access network is corresponding as described candidate access network;

Receive the described Access Network information that described MIIS server returns.

Above-mentioned processor 43 is except the executable code in execute store is to realize except above-mentioned functions in addition, also can be used for performing executable code to complete other steps in said method embodiment one, does not repeat them here.

Figure 13 is the structural representation of server example two of the present invention, and with reference to Figure 13, server comprises communication interface 51, memory 52 and at least one processor 53.Processor 53, memory 52 and communication interface 51 are connected by bus and complete mutual communication.Described bus can be ISA, PCI or eisa bus etc.Described bus can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Figure 13, but not representing the bus only having a bus or a type.Wherein, communication interface 51 can be device or the unit that network interface, USB interface, radio frequency unit, antenna, wi-fi communication module etc. can realize data transmit-receive function.Processor 53 may be a CPU, or ASIC, or is configured to the one or more integrated circuits implementing the embodiment of the present invention.Memory 52 is for stores executable programs code, and this program code comprises computer-managed instruction.Memory 52 may comprise high-speed RAM, still may comprise nonvolatile memory, such as at least one magnetic disc store.Comprising multiple memory cell, for storing data, and storing executable program code in partial memory cell.

In one embodiment, processor 53 runs the program corresponding with described executable program code by reading the executable program code stored in memory 52, for:

Receive the Access Network information request that user equipment (UE) sends;

Search described UE can Access Network as the candidate access network of described UE;

The congestion information of described access node is inquired about to the access node that described candidate access network is corresponding;

Access Network information is returned to described UE, described Access Network information comprises the congestion information of the mark of described candidate access network and access node corresponding to described candidate access network, and the candidate access network selecting access node corresponding according to the congestion information of access node corresponding to described candidate access network and channel quality to make described UE is as objective network and access.

Above-mentioned processor 53 is except the executable code in execute store is to realize except above-mentioned functions in addition, also can be used for performing executable code to complete other steps in said method embodiment two, does not repeat them here.

Figure 14 is the structural representation of access node embodiment two of the present invention, and with reference to Figure 14, access node comprises communication interface 61, memory 62 and at least one processor 63.Processor 63, memory 62 and communication interface 61 are connected by bus and complete mutual communication.Described bus can be ISA, PCI or eisa bus etc.Described bus can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Figure 12, but not representing the bus only having a bus or a type.Wherein, communication interface 61 can be device or the unit that network interface, USB interface, radio frequency unit, antenna, wi-fi communication module etc. can realize data transmit-receive function.Processor 63 may be a CPU, or ASIC, or is configured to the one or more integrated circuits implementing the embodiment of the present invention.Memory 62 is for stores executable programs code, and this program code comprises computer-managed instruction.Memory 62 may comprise high-speed RAM, still may comprise nonvolatile memory, such as at least one magnetic disc store.Comprising multiple memory cell, for storing data, and storing executable program code in partial memory cell.

In one embodiment, processor 63 runs the program corresponding with described executable program code by reading the executable program code stored in memory 62, for:

Access node reception congestion query statement;

According to described congested query statement, obtain the congestion information of the described access node prestored;

The congestion information of described access node is returned.

Wherein, before the congestion information of the described access node that described acquisition prestores, also comprise:

Calculate the congestion parameter of the every bar data flow in every paths of described access node association;

According to the congestion parameter of the every bar data flow in every paths that described access node associates, obtain the congestion information of described access node;

Store the congestion information of described access node.

Particularly, the congestion parameter of the every bar data flow in every paths of described calculating described access node association, comprising:

Based on every bar data flow, add up the grouping number be labeled in the grouping of the total number packets of described data flow be currently received and the described data flow be currently received;

By the grouping number that is labeled in described data flow divided by the total number packets of described data flow, obtain the congestion parameter of described data flow.

Further, the congestion parameter of the every bar data flow in every paths of described calculating described access node association, comprising:

Based on every bar data flow, according to the mark situation of the grouping of predetermined number in the current described data flow received, obtain the congestion parameter of described data flow.

In another kind of mode, after the congestion parameter of the every bar data flow in every paths of described calculating described access node association, also comprise:

With the time interval of presetting, periodically update the congestion parameter of the every bar data flow in every paths of described access node association.

Described access node reception congestion query statement, comprising:

Described access node receives the congested query statement that ANDSF, UE or MIIS server sends;

The described congestion information by described access node returns, and comprising:

The congestion information of described access node is returned to described ANDSF, UE or MIIS server.

Above-mentioned processor 63 is except the executable code in execute store is to realize except above-mentioned functions in addition, also can be used for performing executable code to complete other steps in said method embodiment three, does not repeat them here.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.

Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (28)

1. a method for network access, is characterized in that, comprising:

Obtain Access Network information when switching, described Access Network information comprises at least two access nodes mark of candidate access network corresponding respectively and the congestion information of described at least two access nodes;

The channel quality of at least two access nodes described in measurement;

According to channel quality and the congestion information of described at least two access nodes, the candidate access network that at least two access nodes described in selection, access node is corresponding is as objective network;

Access described objective network.

2. method according to claim 1, is characterized in that, the channel quality of at least two access nodes described in described basis and congestion information, and the candidate access network that at least two access nodes described in selection, access node is corresponding comprises as objective network:

According to the channel quality of described at least two access nodes, at least two access nodes described in determining, channel quality meets at least one pre-conditioned access node;

According to the described congestion information meeting at least one pre-conditioned access node, meet candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network from described.

3. method according to claim 1 and 2, is characterized in that, describedly obtains Access Network information when switching, and comprising:

The network switching notice of reception source Access Network;

According to described network switching notice, send Access Network information request to access network discovery selection function ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

Receive the described Access Network information that described ANDSF returns.

4. method according to claim 1 and 2, is characterized in that, describedly obtains Access Network information when switching, and comprising:

Receive the network switching command of user;

According to described network switching command, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

Receive the described Access Network information that described ANDSF returns.

5. method according to claim 1 and 2, is characterized in that, describedly obtains Access Network information when switching, and comprising:

Receive the beacon of access node, the beacon of described access node comprises the mark of candidate access network corresponding to described access node;

According to the network switching command of user, inquire about the congestion information of described access node to described access node;

Receive the described Access Network information that described access node returns.

6. method according to claim 5, is characterized in that, before the channel quality of at least two access nodes described in described measurement, also comprises:

Obtain the list of available network provider, described available network provider table comprises the mark of at least one available network provider;

The mark of candidate access network corresponding respectively according to described at least two access nodes and the mark of at least one available network provider described, the candidate access network that described in the candidate access network that at least two access nodes described in determining are corresponding respectively, at least one available network provider provides;

The channel quality of at least two access nodes described in described measurement, comprising:

The channel quality of the access node that the candidate access network that described in measuring, at least one available network provider provides is corresponding.

7. method according to claim 1 and 2, is characterized in that, describedly obtains Access Network information when switching, and comprising:

According to the Link State detected, determine to switch;

Send Access Network information request to medium irrelevant information MIIS server, using make described MIIS whois lookup can Access Network inquire about the congestion information of described access node to the access node that described candidate access network is corresponding as described candidate access network;

Receive the described Access Network information that described MIIS server returns.

8. a method for network access, is characterized in that, comprising:

Receive the Access Network information request that user equipment (UE) sends;

Search described UE can Access Network as the candidate access network of described UE;

The congestion information of described access node is inquired about to the access node that described candidate access network is corresponding;

Access Network information is returned to described UE, described Access Network information comprises the congestion information of the mark of described candidate access network and access node corresponding to described candidate access network, and the candidate access network selecting access node corresponding according to the congestion information of access node corresponding to described candidate access network and channel quality to make described UE is as objective network and access.

9. a method for network access, is characterized in that, comprising:

Access node reception congestion query statement;

According to described congested query statement, obtain the congestion information of the described access node prestored;

The congestion information of described access node is returned.

10. method for network access according to claim 9, before the congestion information of the described access node that described acquisition prestores, also comprises:

Calculate the congestion parameter of the every bar data flow in every paths of described access node association;

According to the congestion parameter of the every bar data flow in every paths that described access node associates, obtain the congestion information of described access node;

Store the congestion information of described access node.

11. method for network access according to claim 10, is characterized in that, the congestion parameter of the every bar data flow in every paths of described calculating described access node association, comprising:

Based on every bar data flow, add up the grouping number be labeled in the grouping of the total number packets of described data flow be currently received and the described data flow be currently received;

By the grouping number that is labeled in described data flow divided by the total number packets of described data flow, obtain the congestion parameter of described data flow.

12. method for network access according to claim 10, is characterized in that, the congestion parameter of the every bar data flow in every paths of described calculating described access node association, comprising:

Based on every bar data flow, according to the mark situation of the grouping of predetermined number in the current described data flow received, obtain the congestion parameter of described data flow.

13. method for network access according to any one of claim 10 ~ 12, is characterized in that, after the congestion parameter of the every bar data flow in every paths of described calculating described access node association, also comprise:

With the time interval of presetting, periodically update the congestion parameter of the every bar data flow in every paths of described access node association.

14. method for network access according to any one of claim 10 ~ 13, it is characterized in that, described access node reception congestion query statement, comprising:

Described access node receives the congested query statement that ANDSF, UE or MIIS server sends;

The described congestion information by described access node returns, and comprising:

The congestion information of described access node is returned to described ANDSF, UE or MIIS server.

15. 1 kinds of subscriber equipmenies, is characterized in that, comprising:

Acquisition module, for obtaining Access Network information when switching, described Access Network information comprises at least two access nodes mark of candidate access network corresponding respectively and the congestion information of described at least two access nodes;

Measurement module, for the channel quality of at least two access nodes described in measuring;

Select module, for according to the channel quality of described at least two access nodes and congestion information, the candidate access network that at least two access nodes described in selection, access node is corresponding is as objective network;

Access module, for accessing described objective network.

16. subscriber equipmenies according to claim 15, is characterized in that, described selection module comprises:

First chooser module, for the channel quality according to described at least two access nodes, at least two access nodes described in determining, channel quality meets at least one pre-conditioned access node;

Second chooser module, for according to the described congestion information meeting at least one pre-conditioned access node, meet candidate access network corresponding to an access node selecting Congestion Level SPCC the lightest at least one pre-conditioned access node as objective network from described.

17. subscriber equipmenies according to claim 15 or 16, it is characterized in that, described acquisition module comprises:

First receives submodule, for receiving the network switching notice of source Access Network;

First sends request submodule, for according to described network switching notice, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

First receives information submodule, for receiving the described Access Network information that described ANDSF returns.

18. subscriber equipmenies according to claim 15 or 16, it is characterized in that, described acquisition module comprises:

Second receives submodule, for receiving the network switching command of user;

Second sends request submodule, for according to described network switching command, send Access Network information request to ANDSF, search available Access Network as described candidate access network to make described ANDSF and inquire about the congestion information of described access node to the access node that described candidate access network is corresponding;

Second receives information submodule, for receiving the described Access Network information that described ANDSF returns.

19. subscriber equipmenies according to claim 15 or 16, it is characterized in that, described acquisition module comprises:

3rd receives submodule, and for receiving the beacon of access node, the beacon of described access node comprises the mark of candidate access network corresponding to described access node;

3rd sends request submodule, for the network switching command according to user, inquires about the congestion information of described access node to described access node;

3rd receives information submodule, for receiving the described Access Network information that described access node returns.

20. subscriber equipmenies according to claim 19, is characterized in that, also comprise:

Obtain module, for before the channel quality of at least two access nodes described in described measurement module measurement, obtain the list of available network provider, described available network provider table comprises the mark of at least one available network provider;

Identification module, for according to the corresponding respectively mark of candidate access network of described at least two access nodes and the mark of at least one available network provider described, the candidate access network that described in the candidate access network that at least two access nodes described in determining are corresponding respectively, at least one available network provider provides;

Correspondingly, the channel quality of the access node of candidate access network of described measurement module specifically for measuring at least one available network provider described and providing.

21. subscriber equipmenies according to claim 15 or 16, is characterized in that, in described acquisition module, comprising:

Determine switching submodule, for according to the Link State detected, determine to switch;

4th sends request submodule, for sending Access Network information request to MIIS server, using make described MIIS whois lookup can Access Network inquire about the congestion information of described access node to the access node that described candidate access network is corresponding as described candidate access network;

4th receives information submodule, for receiving the described Access Network information that described MIIS server returns.

22. 1 kinds of servers, is characterized in that, comprising:

Receive request module, for receiving the Access Network information request that user equipment (UE) sends;

Query candidate Access Network module, for search described UE can Access Network as the candidate access network of described UE;

Inquiry congestion information module, inquires about the congestion information of described access node for the access node corresponding to described candidate access network;

Return Access Network information module, Access Network information is returned to described UE, described Access Network information comprises the congestion information of the mark of described candidate access network and access node corresponding to described candidate access network, and the candidate access network selecting access node corresponding according to the congestion information of access node corresponding to described candidate access network and channel quality to make described UE is as objective network and access.

23. 1 kinds of access nodes, is characterized in that, comprising:

Command reception module, for reception congestion query statement;

Congestion information obtains module, for according to described congested query statement, obtains the congestion information of the described access node prestored;

Congestion information returns module, for being returned by the congestion information of described access node.

24. access nodes according to claim 23, is characterized in that, also comprise:

First computing module, for calculating the congestion parameter of the every bar data flow in every paths of described access node association;

Second computing module, for the congestion parameter of the every bar data flow in every paths of associating according to described access node, obtains the congestion information of described access node;

Memory module, for storing the congestion information of described access node.

25. access nodes according to claim 24, is characterized in that, the first computing module, comprising:

Statistics submodule, for based on every bar data flow, the grouping number be labeled in the total number packets of adding up the described data flow be currently received and the grouping of described data flow be currently received;

Operator module, for the grouping number that will be labeled in described data flow divided by the total number packets of described data flow, obtains the congestion parameter of described data flow.

26. access nodes according to claim 24, is characterized in that, the first computing module, specifically for: according to the mark situation of the grouping of predetermined number in the current described data flow received, obtain the congestion parameter of described data flow.

27. access nodes according to any one of claim 24 ~ 26, it is characterized in that, also comprise: update module, for calculate at described first computing module described access node association every paths in every bar data flow congestion parameter after, with the time interval of presetting, periodically update the congestion parameter of the every bar data flow in every paths of described access node association.

28. access nodes according to any one of claim 24 ~ 27, is characterized in that, described command reception module specifically for: receive the congested query statement that ANDSF, UE or MIIS server sends;

Correspondingly, described congestion information return module specifically for: the congestion information of described access node is returned to described ANDSF, UE or MIIS server.