CN101193117A - Intercommunication method, access network and wireless network between terminals - Google Patents

Abstract

The present invention provides a method for intercommunication between terminals in a wireless network based on MIP, comprising: the access network corresponding to the source terminal receives the service flow sent by the source terminal; if the target terminal of the service flow is the same as the source terminal Under one core network but corresponding to different access networks, the access network corresponding to the source terminal sends the service flow directly to the access network corresponding to the target terminal; the access network corresponding to the target terminal sends the service flow to the target terminal. The invention also provides an access network in the MIP-based wireless network, an ASN of the WiMAX network framework, a MIP-based wireless network and a WiMAX network framework. In the present invention, since the service flow between terminals corresponding to different access networks under the same core network is directly forwarded between the access networks without the participation of the core network, the intercommunication between terminals can be reduced. Core network load.

Description

Intercommunication method, access network and wireless network between terminals

technical field

The present invention relates to a wireless communication technology, in particular to an intercommunication technology between terminals in a wireless network based on Mobile Internet Protocol (MIP).

Background technique

The wireless network is one of the current research hotspots, and it includes various types of networks, such as the Worldwide Interoperability Microwave Access (WiMAX) network mentioned in the IEEE802.16 standard. WiMAX network technology is a wireless metropolitan area network (WMAN) technology, which proposes a new air interface standard for microwave and millimeter wave frequency bands. WiMAX is an emerging wireless communication technology used to transmit wireless signals. It can provide high-speed Internet-oriented connections. Using this technology, users can perform data communication at a very fast speed within a range of 50 kilometers.

Founded on April 9, 2001, the WiMAX Forum is a non-profit organization jointly established by industry-leading new communication product and equipment companies. The organization will not only establish a set of specifications based on the IEEE802.16 standard, but also devote itself to a series of research on operational broadband wireless access systems, demand analysis, application mode exploration, and market expansion to vigorously promote broadband wireless access systems. into market development work. The organization has established Certification Working Group (CWG), Technical Working Group (TWG), Spectrum Working Group (RWG), Market Working Group (MWG), Requirements Working Group (SPWG), Network Working Group (NWG) and Applied Research Working Group group (AWG).

Network Working Group (NWG), that is, the working group that formulates WiMAX network specifications, is currently the most active and most concerned working group. The working content of this working group mainly focuses on the IEEE802.16 standard and the core network The formulation of network units, functional entities, messages and protocols clearly defines and describes the parts that are not defined and involved in the existing standards. The goals of the working group are: to establish an end-to-end network reference model to meet the requirements raised by the WiMAX Forum operator working group; to formulate an end-to-end network specification to define functional entities and network interfaces in the network; to lay the foundation for the interoperability certification of WiMAX systems Base.

The network working group divides the formulation of network specifications into three stages, among which, the focus of the second stage is the definition of the network architecture reference model, the description of reference points, the definition of network functions, and the description of protocols and processes.

The current WiMAX network reference model is shown in Figure 1. The WiMAX network includes subscriber stations (Subscribe Station, SS)/mobile station (Mobile Subscribe Station, MS), access service network (Access Service Network, ASN) and connection service network ( Connectivity ServiceNetwork, CSN), wherein, the MS accesses the ASN through the air interface Reference Point 1 (Reference Point 1, R1), the ASN and other ASNs are connected through the R4 interface, the ASN and the CSN are connected through the R3 interface, and the MS and the CSN The interface between them is the logical interface R2, and the R1 interface and the R3 interface are used as actual physical bearers. The ASN is used to provide wireless access control, and the CSN is used to provide Internet Protocol (Internet Protocol, IP) connection management.

When the mobile station is roaming, for the WiMAX mobile station, it communicates with the visited network service provider (Visited Network Service Provider, Visited NSP or V-NSP) and the home network service provider (Home Network Service Provider, Home NSP or H-NSP) communication, the visited network service operator and the home network service operator are connected through the R5 interface. The network provides users with roaming services, and users can still enjoy WiMAX services after they move to different places.

FIG. 2 is a schematic diagram of networking of an access service network. As shown in Figure 2, the access service network includes a base station (Base Station, BS) and an access service network gateway (ASN Gateway, ASN GW), wherein the interface between the BSs is an R8 interface, and the interface between the BS and the ASN GW The interface is R6 interface, ASNGW can be target gateway (Target Gateway, TGW), service gateway (Service Gateway, SGW) and anchor gateway (Anchor Gateway, AGW), the interface between each ASN GW is R4 interface, ASN GW and The interface between CSNs is the R3 interface.

In the network model shown in Figure 1, MIP is used to implement terminal mobility management across ASNs. According to different implementations, the WiMAX Forum has defined two optional MIP solutions: one is proxy mode mobile IP (Proxy Mobile IP, PMIP), and the other is client mode mobile IP (ClientMobile IP, CMIP).

In the PMIP scheme, the MIP client is located in the ASN network, and it performs R3 mobility management on behalf of the MS. All MIP control is completed on the network side, and the process is transparent to the MS. MS obtains its own IP address from the network through Dynamic Host Configuration Protocol (DHCP), and communicates with the network through the obtained IP address. The ASN needs to replace the MS to complete the MIP registration and data transfer.

In the CMIP scheme, the MIP client is located in the MS and performs the functions of a complete MIP client. The MS needs to be fully aware of the details of the MIP process, including MIP registration and registration refresh.

Currently, in the above two MIP schemes, schematic diagrams of data transmission channels from the CSN to the MS are shown in Figure 3 and Figure 4 respectively.

In Figure 3, the care-of address registered by the PMIP client in the home agent (Home Agent, HA) is the core network address (Core of Address, CoA), which is the address of the foreign agent (Foreign Agent, FA). The address is the point of attachment address (Point of Attachment, PoA), that is, the address obtained by the MS through DHCP or other means. Among them, DP Fn provides the R6 interface data channel function, 802.16e CS indicates the convergence sublayer of the 802.16e protocol, L2 indicates layer 2, Payload indicates the load, MIP tunnel indicates the MIP tunnel, Tunnel ID indicates the tunnel ID, and Intra-ASN Data Path indicates ASN internal data channel.

In Figure 4, the care-of address registered by the CMIP client in the HA is CoA, which is the address of the FA, and the home address of the MS is HoA, which is the address obtained by the MS through MIP registration or other means.

In the above two modes, the data transmission path when the MSs intercommunicate is shown in Figure 5, where the 802.16e Function provides the functions specified in the 802.16e protocol, and the data channel function unit (DP Fn) provides the R6 interface data channel function , Router is the router, and Server is the server. In Figure 5, the addressing of MS 1 and MS 2 is carried out by using its HoA, but in the WiMAX network, MS has the characteristic that it is always on its foreign link, so all traffic sent to MS needs to go through HA forwarding. In this case, no matter in which direction the service flow between MSs must be forwarded through the HA, this will inevitably increase the load of the R3 tunnel and the HA.

In practice, the same problem exists for other types of wireless networks using MIP. If the ASN in the WiMAX network corresponds to the access network of other types of wireless networks, and the CSN in the WiMAX network corresponds to the core network of other types of wireless networks, then in other types of wireless networks, terminals (corresponding to the The service flow between MSs must be forwarded through the core network in the wireless network. Therefore, in other types of wireless networks, the service flow between terminals will also increase the load of the core network.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method for intercommunication between terminals in a MIP-based wireless network, an access network in a MIP-based wireless network, an ASN of a WiMAX network architecture, a MIP-based wireless network and The WiMAX network architecture is used to reduce the load of the core network when terminals communicate with each other.

In order to solve the above technical problems, an embodiment of the present invention provides a method for intercommunication between terminals in a MIP-based wireless network, including: the access network corresponding to the source terminal receives the service flow sent by the source terminal; if the service flow The target terminal and the source terminal are under the same core network but correspond to different access networks, then the access network corresponding to the source terminal directly sends the service flow to the access network corresponding to the target terminal; The network access sends the service flow to the target terminal.

An embodiment of the present invention also provides an access network in a MIP-based wireless network, including: a service flow redirection unit for forwarding service flows between two terminals, wherein, if the two terminals are in the same core network but corresponding to different access networks, and the service flow redirection unit corresponds to the source terminal, then the service flow redirection unit directly forwards the service flow sent by the source terminal to the service flow redirection unit corresponding to the target terminal; if The two terminals are under the same core network but correspond to different access networks, and the service flow redirection unit corresponds to the target terminal, then the service flow redirection unit directly receives the service from the service flow redirection unit corresponding to the source terminal flow.

The embodiment of the present invention also provides an ASN of a WiMAX network architecture, including an R6 interface data channel functional unit and an external agent FA unit, and also includes: a service flow redirection unit, which is arranged between the R6 interface data channel functional unit and the FA unit, It is used to forward the service flow between two MSs. If the two MSs are under the same CSN but correspond to different ASNs, and the service flow redirection unit corresponds to the source MS, the service flow redirection unit will The service flow sent by the source MS is directly forwarded to the service flow redirection unit corresponding to the target MS; if two MSs are under the same CSN but correspond to different ASNs, and the service flow redirection unit corresponds to the target MS, the service flow The flow redirection unit directly receives the service flow from the service flow redirection unit corresponding to the source MS.

An embodiment of the present invention also provides a MIP-based wireless network, including a terminal, an access network, and a core network. The access network is used to forward service flows between two terminals. Under the core network but corresponding to different access networks, and the access network corresponds to the source terminal, the access network directly forwards the service flow sent by the source terminal to the access network corresponding to the target terminal; if the two terminals are at the same Under one core network but corresponding to different access networks, and the access network corresponds to the target terminal, the access network directly receives the service flow from the access network corresponding to the source terminal.

The embodiment of the present invention also provides a WiMAX network architecture, including MS, ASN and CSN, and the ASN is used to forward the service flow between two MSs, wherein, if the two MSs are under the same CSN but correspond to different ASNs , and the ASN corresponds to the source MS, then the ASN directly forwards the service flow sent by the source MS to the ASN corresponding to the target MS; if the two MSs are under the same CSN but correspond to different ASNs, and the ASN corresponds to the target MS MS, the ASN directly receives the service flow from the ASN corresponding to the source MS.

Compared with the prior art, the embodiment of the present invention has the following advantages:

In the embodiment of the present invention, since the service flow between terminals corresponding to different access networks under the same core network is directly forwarded between the access networks without the participation of the core network, the communication between terminals Interworking can reduce the load on the core network.

In the embodiment of the present invention, since the service flow between terminals corresponding to different access networks under the same core network is directly forwarded between the access networks, the service flow does not need to be forwarded through the core network, so reducing Intercommunication delay between terminals.

Description of drawings

Figure 1 is a diagram of the current WiMAX network reference model;

FIG. 2 is a schematic diagram of a current access service network;

FIG. 3 is a schematic diagram of a data transfer channel from a CSN to an MS in PMIP mode;

FIG. 4 is a schematic diagram of a data transfer channel from a CSN to an MS in CMIP mode;

FIG. 5 is a schematic diagram of data transmission during intercommunication between current MSs;

FIG. 6 is a schematic diagram of data transfer during intercommunication between MSs according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an ASN according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of networking of a WiMAX network architecture according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a CDMA network according to an embodiment of the present invention.

Detailed ways

Below we will describe in detail the best implementation of the present invention with reference to the accompanying drawings.

Firstly, the overall technical solution of the intercommunication method between terminals in the embodiment of the present invention will be described. First of all, it should be noted that the intercommunication method between terminals in the embodiment of the present invention may be based on a WiMAX network, or based on a Code Division Multiple Access (CDMA, Code Division Multiple Access) system, a CDMA2000 system, or a 3GPP Long Term Evolution (LTE, Long Term Evolution) system. Term Evolution) system, 3GPP2 Air Interface Evolution (AIE, Air Interface Evolution) system/Ultra Mobile Broadband (UMB, Ultra mobileBroadband) system and Wireless Local Area Network (WLAN, Wireless Local Area Network) and other wireless networks using MIP, among them, in WiMAX network In , the terminal is MS. In addition, in a CDMA system, the access network can be composed of a base transceiver station (BTS, Base Transceiver Station), a base station controller (BSC, Base Station Controller) and a packet data service network (PDSN, Packet DataService Network). It can be composed of AAA server (AAA Server), HA, etc.; in the LTE system, the access network can be composed of evolved base stations (eNB, eNodeB) and access gateway (aGW), and the core network can be composed of policy charging controller server (PCC Server, Policy and ChargingController Server), HA and other components.

The method embodiment of the present invention includes: the access network corresponding to the source terminal receives the service flow sent by the source terminal; if the target terminal of the service flow and the source terminal are under the same core network but correspond to different access networks, Then the access network corresponding to the source terminal directly sends the service flow to the access network corresponding to the target terminal; the access network corresponding to the target terminal sends the service flow to the target terminal.

In the embodiment of the above method, if the target terminal of the service flow is under the same core network as the source terminal and corresponds to the same access network, the access network corresponding to the source terminal can directly transfer the service flow to sent to the target terminal.

In an embodiment of the above method, if the target terminal of the service flow is not under the same core network as the source terminal, the access network corresponding to the source terminal may send the service flow to the core network corresponding to the source terminal , the core network corresponding to the source terminal sends the service flow to the core network corresponding to the target terminal, the core network corresponding to the target terminal sends the service flow to the access network corresponding to the target terminal, and the access network corresponding to the target terminal sends The service flow is sent to the target terminal.

In an embodiment of the above method, after the access network corresponding to the source terminal receives the service flow sent by the source terminal and before sending the service flow, it may further include: determining the access network corresponding to the target terminal, or determining the service flow corresponding to the target terminal. Core network and access network.

The access network corresponding to the target terminal may be determined in at least one of the following ways: query the mapping relationship between the pre-saved service flow identifier, the address of the target terminal and its corresponding access network, so as to determine the access network corresponding to the target terminal; Query the access network corresponding to the target terminal from the access network and/or core network corresponding to the source terminal; query the access network corresponding to the target terminal from all access networks under the same core network.

The core network corresponding to the target terminal can be determined in at least one of the following ways: query the mapping relationship between the pre-saved service flow identifier, the address of the target terminal, its corresponding access network, and the corresponding core network, so as to determine the corresponding core network of the target terminal. Core network: query the core network corresponding to the target terminal from the access network and/or core network corresponding to the source terminal.

Specifically, for a WiMAX network, an internet protocol service flow redirection unit can be set between the MS and the corresponding CSN; service flows intercommunicated between MSs under the same CSN can be forwarded through the service flow redirection unit. Wherein, the service flow redirecting unit may be set in the ASN.

For the service flows intercommunicated between MSs of the same ASN under the same CSN, they are forwarded by the service flow redirection unit corresponding to the MS, that is, when the MS sends a service flow and reaches the service flow redirection unit, the service flow redirection unit forwards the service The stream is forwarded to the target MS. In this case, the service flow is forwarded through a service flow redirection unit without being forwarded through the CSN. The service flow 61 shown in FIG. 6 can illustrate this forwarding process. Among them, the 802.16e function unit (802.16e Function) provides the functions stipulated in the 802.16e protocol, and the data channel function unit provides the R6 interface data channel function between the base station BS and the access service network gateway ASNGW.

The service flows intercommunicated between MSs under different ASNs under the same CSN are also forwarded through the service flow redirection unit, that is, when the MS sends a service flow and reaches the service flow redirection unit corresponding to the MS that sent the service flow, the service flow is sent The service flow redirection unit corresponding to the MS of the flow forwards the service flow to the service flow redirection unit corresponding to the target MS, and the service flow redirection unit corresponding to the target MS forwards the service flow to the target MS. In this case, the service flow needs to be forwarded between the two ASNs without going through the CSN. The service flow 62 shown in FIG. 6 can illustrate this forwarding process.

The service flow or other service flows between MSs under different CSNs can also be forwarded through the service flow redirection unit, that is, when the MS sends a service flow, when it reaches the service flow redirection unit corresponding to the MS that sent the service flow, it sends out the service flow The service flow redirection unit corresponding to the MS of the flow forwards the service flow to the CSN corresponding to the MS that sends the service flow. If the destination of the service flow is an MS under another CSN, the CSN corresponding to the MS that sends the service flow forwards the service flow to the CSN corresponding to the target MS, and the CSN corresponding to the target MS forwards the service flow to the target MS; if the destination of the service flow is another network node, such as a server, the CSN corresponding to the MS that sends the service flow forwards the service flow to other network node. In this case, the service flow needs to pass through one CSN or be forwarded among multiple CSNs. The service flow 63 shown in FIG. 6 can illustrate this forwarding process.

When the service flow sent by the MS arrives at the service flow redirection unit, the service flow redirection unit needs to analyze the target IP address of the service flow, that is, to determine whether the destination of the service flow is the MS, and whether the target MS is in the same location as the MS that sent the service flow. Below the CSN and/or under the same ASN, etc. If the target IP address is the HoA of the MS of the same ASN under the same CSN, the service flow redirection unit forwards the service flow to the target MS; if the target IP address is the HoA of the MS corresponding to different ASNs under the same CSN, Then the service flow redirection unit forwards the service flow to the ASN corresponding to the target MS, and the ASN corresponding to the target MS forwards the service flow to the target MS; if the target IP address is the HoA of the MS under different CSNs, the service flow redirection unit The service flow is forwarded to the CSN corresponding to the MS sending the service flow, the CSN corresponding to the MS sending the service flow sends the service flow to the CSN corresponding to the target MS, and the CSN corresponding to the target MS forwards the service flow to the target MS.

There are many ways for the service flow redirection unit to resolve the target IP address.

For example, the service flow redirection unit sets a forwarding table, which stores the mapping relationship between the established service flow identification, the HoA of the target MS and the identification of the ASN corresponding to the target MS in the forwarding table, and the mapping relationship can be in the following form:

(SFID, D-HoA) => (ASN ID, R4 Tunnel),

Among them, SFID indicates the service flow identification, D-HoA indicates the HoA of the target MS, ASN ID indicates the identification of the ASN corresponding to the target MS, and R4 Tunnel indicates the tunnel between ASNs for forwarding the service flow between MSs.

After the service flow redirection unit receives the service flow sent by the corresponding MS, it first inquires whether there is a mapping relationship between the identification of the received service flow, the target IP address of the service flow and the ASN in the forwarding table, and if it exists, it indicates that the service flow The destination is MS.

If the ASN ID in the mapping relationship is the ASN ID corresponding to the MS that sends out the service flow, the service flow redirection unit will directly forward the service flow to the target MS. In this case, the value of R4 Tunnel is arbitrary and has no practical significance. If the ASN ID in the mapping relationship is an ASN ID different from the ASN ID corresponding to the MS that sends out the service flow, the service flow redirection unit forwards the service flow to the ASN corresponding to the target MS, and the ASN corresponding to the target MS forwards the service flow to The target MS, in this case, the value of R4 Tunnel indicates the tunnel between the two ASNs for forwarding the traffic between MSs. If the ASN ID in the mapping relationship is not under the same CSN as the MS sending the service flow, the service flow redirection unit forwards the service flow to the CSN corresponding to the MS sending the service flow, and the CSN forwards the service flow to the target The CSN corresponding to the MS and the CSN corresponding to the target MS forward the service flow to the target MS through the ASN corresponding to the target MS. In this case, the ASN ID and R4 Tunnel take the default route.

If there is no mapping relationship between the identifier of the received service flow, the target IP address of the service flow and the ASN in the forwarding table, the service flow redirection unit can obtain the destination information and/or purpose of the service flow in the following three ways The corresponding ASN information:

1. The service flow redirection unit inquires about the destination information of the service flow to the CSN corresponding to the MS that sends the service flow, and the CSN corresponding to the MS that sends the service flow returns the query result to the service flow redirection unit. If the destination is MS, The CSN corresponding to the MS that sends out the service flow will return the ASN information corresponding to the target MS, such as ASN ID, etc.;

2. The ASN where the service flow redirection unit is located can receive MS information synchronized by other ASNs, and the service flow redirection unit can query the destination information about the service flow from these information. For example, if a certain ASN accesses an MS, This ASN can synchronize the information of the MS to the ASN corresponding to the MS that sends the service flow, and the ASN corresponding to the MS that sends the service flow can collect multiple MS information in this way;

3. The ASN where the service flow redirection unit is located sends a query request to all ASNs under the same CSN to inquire about the destination information of the service flow. The ASN inquires which ASN the MS corresponding to the target IP address is under and the information of the target MS.

After obtaining the target MS information and/or the ASN information corresponding to the target MS, the service flow redirection unit establishes a mapping relationship between the service flow identifier, the HoA of the target MS, and the identifier of the ASN corresponding to the target MS, and the service flow redirection unit for Subsequent service flows with the same target IP address sent by the same MS can be forwarded with reference to this mapping relationship.

If the service flow redirection unit knows that the destination of the service flow is a non-MS, then the ASN ID and R4Tunnel take the default route, and the service flow redirection unit forwards the service flow to the CSN corresponding to the MS that sends the service flow, and the CSN sends the service flow The business flow is forwarded.

The following is a specific embodiment provided by the present invention.

Please refer to Fig. 6 again, assuming that the IP addresses of mobile station (MS) 1 and mobile station (MS) 2 are 10.0.0.1 and 10.0.0.2 respectively, mobile station 1 accesses the network from access service network (ASN) 1, mobile Station 2 accesses the network from Access Service Network (ASN) 2, and Access Service Network 1 and Access Service Network 2 belong to the same Connection Service Network (CSN). At a certain moment, mobile station 1 needs to perform MSN instant messaging service with mobile station 2, when the IP data packet of mobile station 1 reaches the service flow through the bearer of 802.16e function unit (802.16eFunction) and data channel function unit (DP Fn) When the redirection unit (PacketRedirector) is used, the service flow redirection unit will analyze the destination address of the IP data packet. If the target address is the address of the mobile station 2 connected under the access service network 2, and the access service network 1 and the access service network 2 belong to the same connection service network, the service flow redirection unit will initiate the establishment of the access service The R4 tunnel between network 1 and access service network 2 is used to carry the data from mobile station 1 to mobile station 2, and the R4 tunnel should be marked as the mobile station intercommunication type to distinguish it from the original access service network. R4 tunnel between. After the R4 tunnel is established, the service flow redirection unit redirects all IP data packets from the mobile station 1 to the mobile station 2 to the R4 tunnel, and carries them on the R4 tunnel. After the access service network 2 receives the IP data packets from the R4 tunnel, it will process the IP data packets differently from other types of R4 tunnels, and transfer the IP data packets to the mobile station 2. For the IP data packet in the direction from mobile station 2 to mobile station 1, the processing method is the same.

What needs to be explained here is that under the WiMAX network architecture, the method for intercommunication between MSs can be applied in PMIP and CMIP modes, and can also be applied in other MIP modes.

In addition to providing the method embodiment, the present invention also provides an embodiment of an access network in a MIP-based wireless network, including: a service flow redirection unit, configured to forward a service flow between two terminals, wherein, if two The terminals are under the same core network but correspond to different access networks, and the service flow redirection unit corresponds to the source terminal, then the service flow redirection unit directly forwards the service flow sent by the source terminal to the service corresponding to the target terminal flow redirection unit; if the two terminals are under the same core network but correspond to different access networks, and the service flow redirection unit corresponds to the target terminal, then the service flow redirection unit directly obtains the corresponding service from the source terminal The stream redirection unit receives traffic streams.

In the above embodiment of the access network, if the service flow redirection unit corresponds to the two terminals at the same time, the service flow redirection unit may directly transfer the service flow from the source terminal to the The service flow is forwarded to the target terminal.

The WiMAX network is taken as an example for description below. FIG. 7 is a schematic structural diagram of an ASN based on a WiMAX network architecture. As shown in Figure 7, the ASN701 includes a service flow redirection unit (PacketRedirector) 7011, an 802.16e function unit (802.16e Function) 7012, a data path function unit (DP Fn) 7013, an external agent unit (FA) 7014, an authentication unit ( Authenticator) 7015 and MIP client (MIP Client) 7016, 802.16e functional unit 7012 provides the functions stipulated in the 802.16e protocol, data channel function unit 7013 provides the R6 interface data channel between the base station BS and the access service network gateway ASN GW function, the external proxy unit 7014 provides external proxy functions, and the authentication unit 7015 provides authentication functions, wherein the 802.16e functional unit 7012 is set between the data channel functional unit 7013 and the authentication unit 7015, and the MIP client 7016 is connected to the external proxy unit 7014. The service flow redirection unit 7011 is set between the data channel function unit 7013 and the external agent unit 7014, and is used for forwarding service flows between MSs under the same CSN. The service flow redirection unit 7011 includes: a target IP address resolution module, which is used to resolve the target IP address of the service flow sent by the corresponding MS; a mapping relationship management module, which is used to manage the identification of the service flow, the HoA of the target MS and the corresponding The mapping relationship between ASN identifiers.

For the service flow intercommunicated between MSs under the ASN701 shown in Figure 7, it can be forwarded in the service flow redirection unit 7011, that is, the service flow passes through the bearer of the 802.16e function unit 7012 and the data channel function unit 7013 to reach the service flow The redirection unit 7011, if the service flow redirection unit 7011 finds that the destination of the service flow is the MS under the ASN701, forwards the service flow to the target MS through the bearers of the data channel function unit 7013 and the 802.16e function unit 7012 in sequence.

For the service flow intercommunicated between MSs under different ASNs under the same CSN, it can be forwarded between ASN701 shown in Figure 7 and another ASN, specifically, it can be forwarded between the service flow redirection unit 7011 and another The service flow redirection units in the ASN are forwarded, that is, the service flow passes through the bearer of the 802.16e function unit 7012 and the data channel function unit 7013 to reach the service flow redirection unit 7011. If the service flow redirection unit 7011 finds that the service flow If the destination is an MS under another ASN under the same CSN, the service flow is forwarded to the service flow redirection unit in the ASN corresponding to the target MS, and the service flow redirection unit in the ASN corresponding to the target MS forwards the service flow The stream is forwarded to the target MS through the bearer of the data channel functional unit and the 802.16e functional unit in the ASN corresponding to the target MS in turn.

The service flow or other service flow between MSs under different CSNs can be forwarded through the service flow redirection unit 7011 shown in Figure 7, that is, the service flow passes through the 802.16e function unit 7012 and the data channel function unit 7013 The bearer of the service flow reaches the service flow redirection unit 7011, if the service flow redirection unit 7011 finds that the destination of the service flow is an MS or other network node under another CSN, the service flow redirection unit 7011 forwards the service flow to the external agent unit 7014 , the external agent unit 7014 forwards the service flow to the CSN corresponding to the ASN701 shown in FIG. 7 , and the CSN corresponding to the ASN701 forwards the service flow.

When the service flow sent by the MS reaches the service flow redirection unit 7011, the service flow redirection unit 7011 needs to analyze the target IP address of the service flow, that is, to determine whether the destination of the service flow is the MS, and whether the target MS is in the same location as the MS that sent the service flow. Under the same CSN and/or under the same ASN, etc. If the target IP address is the HoA of the MS of ASN701, the service flow redirection unit 7011 forwards the service flow to the target MS; if the target IP address is the HoA of the MS corresponding to another ASN, the service flow redirection unit 7011 forwards the service flow Send to the service flow redirection unit in the ASN corresponding to the target MS, and the service flow redirection unit in the ASN corresponding to the target MS forwards the service flow to the target MS; if the target IP address is the HoA of the MS under different CSNs, then The service flow redirection unit 7011 forwards the service flow to the CSN corresponding to the ASN701, the CSN corresponding to the ASN701 sends the service flow to the CSN corresponding to the target MS, and the CSN corresponding to the target MS forwards the service flow to the target MS.

There are many ways for the service flow redirecting unit 7011 to resolve the target IP address.

For example, the service flow redirection unit 7011 sets a forwarding table, which stores the mapping relationship between the established service flow identification, the HoA of the target MS and the identification of the ASN corresponding to the target MS in the forwarding table, and the mapping relationship can be in the following form:

(SFID, D-HoA) => (ASN ID, R4Tunnel),

Among them, SFID indicates the service flow identification, D-HoA indicates the HoA of the target MS, ASN ID indicates the identification of the ASN corresponding to the target MS, and R4 Tunnel indicates the tunnel between ASNs for forwarding the service flow between MSs.

After the service flow redirection unit 7011 receives the service flow passing through the 802.16e function unit 7012 and the data channel function unit 7013, it first inquires whether there is an identification of the received service flow, the destination IP address of the service flow, and the ASN in the forwarding table. If there is a mapping relationship, it indicates that the destination of the service flow is MS.

If the ASN ID in the mapping relationship is the ID of ASN701, the service flow redirection unit 7011 forwards the service flow to the target MS. In this case, the value of R4 Tunnel is arbitrary and has no practical significance. If the ASN ID in the mapping relationship is an ASN ID different from the ID of ASN701, the service flow redirection unit 7011 forwards the service flow to the service flow redirection unit in the ASN corresponding to the target MS, and the service flow in the ASN corresponding to the target MS The redirection unit then forwards the service flow to the target MS. In this case, the value of R4 Tunnel indicates the tunnel between the ASN701 and the ASN corresponding to the target MS for forwarding the service flow between MSs. If the ASN ID in the mapping relationship is not under the same CSN as ASN701, the service flow redirection unit 7011 forwards the service flow to the CSN corresponding to ASN701, and the CSN corresponding to ASN701 forwards the service flow to the CSN corresponding to the target MS , the CSN corresponding to the target MS forwards the service flow to the target MS through the service flow redirection unit in the ASN corresponding to the target MS. In this case, the ASN ID and R4Tunnel take the default route.

If there is no mapping relationship between the identifier of the received service flow, the target IP address of the service flow and the ASN in the forwarding table, the service flow redirection unit 7011 can acquire the destination information and/or about the service flow in the following three ways ASN information corresponding to the destination:

1. The service flow redirection unit 7011 queries the CSN corresponding to the ASN701 about the destination information of the service flow, and the CSN corresponding to the ASN701 returns the query result to the service flow redirection unit 7011. If the destination is MS, the CSN corresponding to the ASN701 returns ASN information corresponding to the target MS, such as ASN ID, etc.;

2. The ASN701 can receive MS information synchronized from other ASNs, and the service flow redirection unit 7011 can query the destination information of the service flow from these information. For example, if an ASN is connected to an MS, this ASN can transfer the MS The information is synchronized to ASN701, and ASN701 can collect multiple MS information in this way;

3. ASN701 sends a query request to all ASNs under the same CSN to inquire about the destination information of the service flow. For example, ASN701 can ask all ASNs under the same CSN which ASN the MS corresponding to the target IP address is under and Information about the target MS.

After obtaining the target MS information and/or the ASN information corresponding to the target MS, the service flow redirection unit 7011 establishes a mapping relationship between the service flow identifier, the HoA of the target MS, and the identifier of the ASN corresponding to the target MS, and the service flow redirection unit 7011 For subsequent service flows sent by the same MS with the same target IP address, the mapping relationship may be referred to for forwarding.

If the service flow redirection unit 7011 knows that the destination of the service flow is a non-MS, then the ASN ID and R4Tunnel take the default route, and the service flow redirection unit 7011 forwards the service flow to the CSN corresponding to the ASN701, and the CSN forwards the service flow send out.

Since the present invention improves the access network, and the access network can be applied to wireless networks, the present invention also provides an embodiment of a MIP-based wireless network, including terminals, access networks, and core networks. The access network is used to forward the service flow between two terminals. If the two terminals are under the same core network but correspond to different access networks, and the access network corresponds to the source terminal, the access network The network directly forwards the service flow sent by the source terminal to the access network corresponding to the target terminal; if the two terminals are under the same core network but correspond to different access networks, and the access network corresponds to the target terminal, the The access network directly receives the service flow from the access network corresponding to the source terminal.

In the above wireless network embodiment, if the access network corresponds to the two terminals at the same time, the access network may directly forward the service flow sent by the source terminal to the target terminal.

The WiMAX network is taken as an example for description below. FIG. 8 is a schematic diagram of networking of a WiMAX network architecture. As shown in Figure 8, the WiMAX network architecture includes an access service network (ASN) 801A, a mobile station (MS) 802A, an access service network (ASN) 801B, a mobile station (MS) 802B and a connection service network (CSN) 803, The interface between the access service network 801A and the mobile station 802A, the interface between the access service network 801B and the mobile station 802B are respectively R1 interface, the interface between the access service network 801A and the connection service network 803, and the access service The interfaces between the network 801B and the connection service network 803 are respectively R3 interfaces. It should be noted that Figure 8 is only a schematic diagram of a WiMAX network architecture. In practical applications, the WiMAX network architecture can have multiple access service networks, mobile stations, and connection service networks, and one connection service network can access multiple Access service network, one access service network can access multiple mobile stations.

The access service network realizes the complete set of functions required by the mobile station to access the WiMAX network through wireless, mainly including:

WiMAX Layer-2(L2) connectivity with WiMAX SS/MS, complete WiMAX layer 2 connection with WiMAX terminal;

Transfer of AAA control messages to WiMAX subscriber's Home NetworkService Provider (H-NSP) for authentication, authorization and session accounting for subscriber sessions Billing;

Network discovery and selection of an appropriate NSP that WiMAXsubscriber accesses WiMAX service(s) from, supports the network discovery and selection function of the terminal to discover and select an appropriate NSP to provide appropriate WiMAX services for the user;

Relay functionality for establishing Layer-3 (L3) connectiVity with a WiMAXSS/MS (i.e.IP address allocation), providing relay functionality for WiMAX terminals to help them establish Layer-3 connections (such as IP address allocation);

Radio Resource Management, unlimited resource management;

ASN-CSN tunneling, ASN-CSN tunneling;

Intra-ASN mobility, mobility management between ASNs;

Paging and Location Management, paging and location management;

Visited Location Register, Visited Location Register.

CSN implements the complete set of functions required to provide IP connection services for MSs, including:

SS/MS IP address and endpoint parameter allocation for user sessions, WiMAX terminal IP address and node parameter allocation;

Internet access, Internet access;

AAA proxy or server, AAA proxy or server;

Policy and Admission Control based on user subscription profiles, policy control and admission control based on user registration information;

ASN-CSN tunneling support, tunnel support between ASN and CSN;

WiMAX subscriber billing and inter-operator settlement, WiMAX user billing and inter-operator settlement;

Inter-CSN tunneling for roaming, inter-CSN tunnel for roaming;

Inter-ASN mobility (WiMAX services (e.g., Location Based Services, Peer-to-Peer Services, Multimedia Broadcast/Multicast Services, IP-multimedia Subsystem Services, and Law Enforcement Services, among others), inter-ASN mobility (WiMAX services (such as , location-based services, end-to-end services, multimedia broadcast and multicast services, IP multimedia subsystem services, and legal-related services)).

In FIG. 8, the access service network 801A includes a service flow redirection unit (Packet Redirector) 8011A, an 802.16e function unit (802.16e Function) 8012A, a data path function unit (DPFn) 8013A, an external agent unit (FA) 8014A, The authentication unit (Authenticator) 8015A and the MIP client (MIP Client) 8016A, the 802.16e function unit 8012A provides the functions stipulated in the 802.16e protocol, and the data channel function unit 8013A provides the R6 between the base station BS and the access service network gateway ASN GW Interface data channel function, external agent unit 8014A provides external agent function, authentication unit 8015A provides authentication function, wherein, 802.16e function unit 8012A is set between data channel function unit 8013A and authentication unit 8015A, MIP client 8016A and external agent unit 8014A connection. The service flow redirection unit 8011A is set between the data channel function unit 8013A and the external agent unit 8014A, and is used to forward the service flow between mobile stations under the same connection service network. The service flow redirection unit 8011A includes: a target IP address resolution module, which is used to analyze the target IP address of the service flow sent by the mobile station 802A; a mapping relationship management module, which is used to manage the identification of the service flow, the HoA of the target mobile station and the target mobile station The mapping relationship of the identifier of the access service network corresponding to the station. The structure of the access service network 801B is the same as that of the access service network 801A.

For the service flow intercommunicated between mobile stations under the access service network 801A shown in FIG. 8 , it can be forwarded in the Packet service flow redirection unit 8011A, that is, the service flow passes through the 802.16e functional unit 8012A and the data channel functional unit in sequence. The bearer of 8013A reaches the service flow redirection unit 8011A. If the service flow redirection unit 8011A finds that the destination of the service flow is the mobile station under the access service network 801A, the service flow will pass through the data channel function unit 8013A and the 802.16e function in sequence. The bearer of unit 8012A is forwarded to the target mobile station.

For the traffic flow between the mobile station 802A and the mobile station 802B shown in FIG. 8, it can be forwarded between the access service network 801A and the access service network 801B. Specifically, the service flow redirection unit 8011A can Forwarding with the service flow redirection unit 8011B. Taking the mobile station 802A sending a service flow to the mobile station 802B as an example, the service flow passes through the 802.16e functional unit 8012A and the data channel function unit 8013A in sequence to reach the service flow redirection unit 8011A. If the service flow redirection unit 8011A finds that the service flow If the destination is the mobile station 802B, the service flow is forwarded to the service flow redirection unit 8011B, and the service flow redirection unit 8011B forwards the service flow to the mobile station 802B through the bearer of the data channel function unit 8013B and the 802.16e function unit 8012B in sequence . The flow of the mobile station 802B sending the service flow to the mobile station 802A is the same as the principle of the above flow.

The service flows or other service flows intercommunicated between mobile stations under different connection service networks can be forwarded by the service flow redirection unit. Take the mobile station 802A sending a service flow to another mobile station connected to the service network as an example, the service flow passes through the bearer of the 802.16e function unit 8012A and the data channel function unit 8013A to reach the service flow redirection unit 8011A, if the service flow redirection Unit 8011A finds that the destination of the service flow is another mobile station under the connection service network, the service flow redirection unit 8011A forwards the service flow to the external agent unit 8014A, and the external agent unit 8014A forwards the service flow to the connection service network 803, and the connection The service network 803 forwards the service flow.

When the service flow sent by the mobile station reaches the service flow redirection unit, the service flow redirection unit needs to analyze the target IP address of the service flow, that is, to determine whether the destination of the service flow is the mobile station and whether the target mobile station is the same as the mobile station that sent the service flow. The stations are under the same connection service network and/or under the same access service network, etc. Taking mobile station 802A as an example, if the target IP address is the HoA of the mobile station accessing service network 801A, then service flow redirection unit 8011A forwards the service flow to the target mobile station; if the target IP address is the HoA of mobile station 802B HoA, then the service flow redirection unit 8011A forwards the service flow to the service flow redirection unit 8011B, and the service flow redirection unit 8011B forwards the service flow to the mobile station 802B; if the target IP address is a mobile station under a different connection service network HoA of the mobile station, the service flow redirection unit 8011A forwards the service flow to the connection service network 803, and the connection service network 803 sends the service flow to the connection service network corresponding to the target mobile station, and the connection service network corresponding to the target mobile station forwards the service flow The stream is forwarded to the target mobile station.

There are many ways for the service flow redirection unit 8011A to resolve the target IP address.

For example, the service flow redirection unit 8011A sets a forwarding table, which stores the mapping relationship between the established service flow identifier, the HoA of the target mobile station, and the identifier of the access service network corresponding to the target mobile station. The mapping relationship can be in the following form:

(SFID, D-HoA) => (ASN ID, R4Tunnel),

Among them, SFID represents the service flow identifier, D-HoA represents the HoA of the target mobile station, ASN ID represents the identification of the access service network corresponding to the target mobile station, and R4Tunnel represents the traffic between the access service networks used to forward the intercommunication between mobile stations. Tunnel for business flow.

After the service flow redirection unit 8011A receives the service flow passing through the 802.16e function unit 8012A and the data channel function unit 8013A, it first inquires whether there is an identification of the received service flow, the target IP address of the service flow and the access service network in the forwarding table. If there is a mapping relationship among them, it indicates that the destination of the service flow is the mobile station.

If the ASN ID in the mapping relationship is the ID of the access service network 801A, the service flow redirection unit 8011A forwards the service flow to the target mobile station. In this case, the value of R4Tunnel is arbitrary and has no practical significance. If the ASN ID in the mapping relationship is the ID of the access service network 801B, the service flow redirection unit 8011A forwards the service flow to the service flow redirection unit 8011B, and the service flow redirection unit 8011B forwards the service flow to the mobile station 802B again, In this case, the value of R4Tunnel indicates the tunnel between the access service network 801A and the access service network 802B for forwarding the service flows communicated between mobile stations. If the ASN ID in the mapping relationship is not the ASN ID under the same connection service network as the access service network 801A, the service flow redirection unit 8011A forwards the service flow to the connection service network 803, and the connection service network 803 forwards the service flow again The connection service network corresponding to the target mobile station is given, and the connection service network corresponding to the target mobile station forwards the service flow to the target mobile station through the service flow redirection unit in the access service network corresponding to the target mobile station. In this case, the ASN ID and R4Tunnel take the default route.

If there is no mapping relationship between the identification of the received service flow, the target IP address of the service flow and the access service network in the forwarding table, the service flow redirection unit 8011A can obtain the destination information about the service flow in the following three ways and/or the access service network information corresponding to the destination:

1. The service flow redirection unit 8011A queries the connection service network 803 about the destination information of the service flow, and the connection service network 803 returns the query result to the service flow redirection unit 8011A. If the destination is a mobile station, the connection service network 803 will Return the access service network information corresponding to the target mobile station, such as ASN ID, etc.;

2. The access service network 801A can receive the mobile station information synchronized by other access service networks, and the service flow redirection unit 8011A can query the destination information of the service flow from these information, for example, the access service network 801B accesses Mobile station 802B, access service network 801B can synchronize the information of mobile station 802B to access service network 801A, and access service network 801A can collect multiple mobile station information in this way;

3. The access service network 801A sends a query request to all access service networks under the same connection service network to inquire about the destination information of the service flow. The access service network inquires which access service network the mobile station corresponding to the target IP address is under and information about the target mobile station.

After obtaining the target mobile station information and/or the access service network information corresponding to the target mobile station, the service flow redirection unit 8011A establishes the service flow identifier, the HoA of the target mobile station, and the identifier of the access service network corresponding to the target mobile station. The service flow redirection unit 8011A can refer to this mapping relationship to forward the subsequent service flows with the same target IP address sent by the same mobile station.

If the service flow redirection unit 8011A knows that the destination of the service flow is a non-mobile station, then ASNID and R4Tunnel take the default route, and the service flow redirection unit 8011A forwards the service flow to the connection service network 803, and the connection service network 803 Forward the business flow.

The analysis of the target IP address by the service flow redirection unit 8011B is the same as other processing procedures of the service flow redirection unit 8011A.

Although most of the above embodiments describe the method embodiment, the access network embodiment and the wireless network embodiment of the present invention using the WiMAX network architecture, in practical applications, other wireless network embodiments can also be used for The method embodiment, the access network embodiment and the wireless network embodiment of the present invention are described. The following uses a CDMA network as an example for description.

FIG. 9 is a schematic structural diagram of a CDMA network. Specifically, the service flow redirection unit (Packet Redirector) is located before the FA in the PDSN. For the uplink direction, the service flow from the MS is processed by the CDMA Delivery Function unit (CDMA Delivery Function) and then delivered to the service flow redirection unit for processing. , according to the processing results, part of the processed service flow is sent to HA for processing through FA, and part of it is sent to other corresponding PDSN for processing through the tunnel between PDSNs; for the downlink direction, the service flow from FA is transparently transmitted, of course , and can also transparently transmit service flows from other PDSNs. Among them, the FA is used to realize the function of the external agent stipulated in the standard MIP protocol, and the service flow redirection unit determines the forwarding direction by judging the destination address of the uplink service flow, so as to realize the data forwarding between PDSNs.

In the embodiment of the present invention, since the service flows between terminals under the same core network and corresponding to the same access network are forwarded within the same access network, without the participation of the core network, this can further reduce the burden on the core network. net load.

In the embodiment of the present invention, since the service flow between terminals under the same core network and corresponding to the same access network is directly forwarded inside the access network, the service flow does not need to be forwarded through the core network, so further reducing The intercommunication delay between terminals is reduced.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (17)

1. method based on intercommunication between the terminal in the wireless network of Mobile Internet Protocol MIP is characterized in that comprising:

The Business Stream that the Access Network reception sources terminal of source terminal correspondence is sent;

Under the core net but corresponding different Access Network, then the Access Network of source terminal correspondence directly is dealt into described Business Stream the Access Network of target terminal correspondence if the target terminal of described Business Stream and described source terminal coexist;

The Access Network of target terminal correspondence is dealt into target terminal with described Business Stream.

2. the method for intercommunication between the terminal as claimed in claim 1, it is characterized in that also comprising: under the core net and corresponding identical Access Network, then the Access Network of source terminal correspondence directly is dealt into target terminal with described Business Stream if the target terminal of described Business Stream and described source terminal coexist.

3. the method for intercommunication between the terminal as claimed in claim 1, it is characterized in that also comprising: if the target terminal of described Business Stream and described source terminal be not under same core net, then the Access Network of source terminal correspondence is dealt into described Business Stream the core net of source terminal correspondence, the core net of source terminal correspondence is dealt into described Business Stream the core net of target terminal correspondence, the core net of target terminal correspondence is dealt into the Access Network of target terminal correspondence with described Business Stream, and the Access Network of target terminal correspondence is dealt into target terminal with described Business Stream.

4. as the method for intercommunication between claim 1, the 2 or 3 described terminals, it is characterized in that, also comprise before sending after the Business Stream that the Access Network reception sources terminal of source terminal correspondence is sent and with described Business Stream: determine the Access Network of target terminal correspondence, perhaps determine the core net and the Access Network of target terminal correspondence.

5. the method for intercommunication between the terminal as claimed in claim 4 is characterized in that determining according to following a kind of mode at least the Access Network of target terminal correspondence:

Mapping relations between traffic stream identifier, the destination terminal addresses that inquiry is preserved the in advance Access Network corresponding with it are with the Access Network of definite target terminal correspondence;

To the Access Network of source terminal correspondence and/or the Access Network of core net query aim terminal correspondence;

The Access Network of all the Access Network query aim terminal correspondences under same core net.

6. the method for intercommunication between the terminal as claimed in claim 4 is characterized in that determining according to following a kind of mode at least the core net of target terminal correspondence:

Mapping relations between Access Network that traffic stream identifier, the destination terminal addresses that inquiry is preserved in advance is corresponding with it and the corresponding core net are to determine the core net of target terminal correspondence;

To the Access Network of source terminal correspondence and/or the core net of core net query aim terminal correspondence.

7. the method for intercommunication between the terminal as claimed in claim 1, it is characterized in that: described terminal is the terminal of the WiMAX network architecture, described Access Network is the access service network ASN of the WiMAX network architecture, and described core net is the connectivity serving network CSN of the WiMAX network architecture.

8. the method for intercommunication between the terminal as claimed in claim 7 is characterized in that: described terminal is a mobile station MS.

9. one kind based on the Access Network in the wireless network of MIP, it is characterized in that comprising:

Business Stream is redirected the unit, be used to transmit two Business Streams between the terminal, wherein, if two terminals coexist under the core net but corresponding different Access Network, and described Business Stream is redirected the corresponding source terminal in unit, and then described Business Stream is redirected the Business Stream that source terminal is sent the unit and directly is forwarded to the redirected unit of target terminal corresponding service stream; If two terminals coexist under the core net but corresponding different Access Network, and described Business Stream is redirected the corresponding target terminal in unit, and then described Business Stream is redirected the unit and directly is redirected the unit from source terminal corresponding service stream and receives Business Stream.

10. Access Network as claimed in claim 9, it is characterized in that: if described Business Stream is redirected simultaneously corresponding described two terminals in unit, then described Business Stream is redirected the unit after receiving the Business Stream that source terminal sends, and directly described work flow is dealt into target terminal.

11. the ASN of a WiMAX network architecture comprises R6 interface data channel function unit and external agent FA unit, it is characterized in that also comprising:

Business Stream is redirected the unit, be arranged between R6 interface data channel function unit and the FA unit, be used to transmit two Business Streams between the MS, wherein, following but the corresponding different ASN of a CSN if two MS coexist, and described Business Stream is redirected the corresponding source MS in unit, and then described Business Stream is redirected the Business Stream that source MS is sent the unit and directly is forwarded to the redirected unit of target MS corresponding service stream; If two MS coexist a CSN down but corresponding different ASN, and described Business Stream is redirected the corresponding target MS in unit, then described Business Stream is redirected the unit and directly is redirected the unit from source MS corresponding service stream and receives Business Stream.

12. the ASN of the WiMAX network architecture as claimed in claim 11, it is characterized in that: if described Business Stream is redirected simultaneously corresponding described two MS in unit, then described Business Stream is redirected the unit behind the Business Stream that the source MS of receiving sends, directly described work flow is dealt into R6 interface data channel function unit, by R6 interface data channel function unit described work flow is dealt into target MS again.

13. wireless network based on MIP, comprise terminal, Access Network and core net, it is characterized in that: described Access Network is used to transmit two Business Streams between the terminal, wherein, if two terminals coexist under the core net but corresponding different Access Network, and the corresponding source terminal of described Access Network, the Business Stream that then described Access Network sends source terminal directly is forwarded to the Access Network of target terminal correspondence; If two terminals coexist under the core net but corresponding different Access Network, and the corresponding target terminal of described Access Network, then described Access Network directly receives Business Stream from the Access Network of source terminal correspondence.

14. wireless network as claimed in claim 13 is characterized in that: if simultaneously corresponding described two terminals of described Access Network, the work flow that then described Access Network directly sends source terminal is dealt into target terminal.

15. WiMAX network architecture, comprise MS, ASN and CSN, it is characterized in that: described ASN is used to transmit two Business Streams between the MS, wherein, following but the corresponding different ASN of a CSN if two MS coexist, and the corresponding source MS of described ASN, the Business Stream that then described ASN sends source MS directly is forwarded to the ASN of target MS correspondence; Following but the corresponding different ASN of a CSN if two MS coexist, and the corresponding target MS of described ASN, then described ASN directly receives Business Stream from the ASN of source MS correspondence.

16. the WiMAX network architecture as claimed in claim 15 is characterized in that: if described ASN is simultaneously corresponding described two MS, the work flow that then described ASN directly sends source MS is dealt into target MS.

17. the WiMAX network architecture as claimed in claim 15 is characterized in that: be provided with the R4 tunnel between the ASN, described R4 Tunnel Identifier is the type of Business Stream between the carrying MS.

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