WO2009076821A1 - A method, system and device for establishing data path in wireless network - Google Patents

Abstract

The present invention provides a method, system and device for establishing data path in wireless network. Said method includes: judging whether there has a directly accessible route between the source node and destination node; if there has, sending data path DP establishing request message, said DP establishing request message including directly accessible route indication and DP endpoint identifier, said DP endpoint identifier being said source node identifier; receiving DP establishing response message, DP endpoint identifier in said DP establishing response message being destination node identifier, said DP establishing response messageincluding directly accessible route indication. The technical solution of the present invention greatly decreases the burden of the serving gateway.

Description

 Method, system and device for establishing data channel in wireless network The application claims to be submitted to the Chinese Patent Office on November 21, 2007, the application number is 200710187167.3, and the invention name is "a method and system for establishing a data channel in a wireless network" The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. Technical field

 The embodiments of the present invention relate to the field of communications technologies, and in particular, to a method, system, and device for establishing a data channel in a wireless network. Background technique

 In the WiMax ( Worldwide Interoperability for Microwave Access), the ASN (Access Service Network) anchor mobility management diagram is shown in Figure 1, which includes the following functions: DPF (Data Path Function, data Channel function), HOF (HandOff Function) and CF (Context Function). The data channel function manages the establishment of the bearer plane between the two peers and may also include the establishment of any tunnels and/or additional functions required to process the bearer plane. The data channel function can be used to establish a bearer plane between base stations, between ASN GWs (Gateways), or between base stations and ASN GWs, and can also handle multicast or broadcast. In order to guarantee a low latency connection during handover, the data channel function can be selectively used to solve it.

Each data channel function is responsible for instantiating and managing the data bearer with another data channel function, selecting the bearer payload through the data channel. The data channel includes the following two types: The first type is IP (Internet Protocol) or Ethernet (Ethernet) packet forwarding, layer 2 or layer 3 processing. The data channel is a typical IP-in-IP tunnel, such as GRE (Generic Routing Encapsulation); or a Layer 2 network, such as Ethernet or MPLS (Multi Protocol Label Switching). Payload of data channel is IP data Additional information can be attached to the packet or Ethernet packet, packet header and payload to handle header compression, sequential transmission, and so on. Data bearers can be connected by routing (layer 3) or bridge (layer 2).

 The second type is layer 2 data packet forwarding, layer 3 processing. This type of data channel bearer is a typical general IP tunnel (such as GRE) or a layer 2 network (such as Ethernet or MPLS). The data channel payload is a layer 2 data packet, which is defined in an IEEE 802.16e MAC (Medium Access Control) SDU (Service Data Unit). A part of the payload can be attached to the CID (Connection Identifier of the target base station). Other information such as connection identifier), ARQ (Automatic Retransmission Request) parameters.

 The data channel bearer function can be further divided into Anchor DP (Data Path) function, service DP function, target DP function and relay DP function according to the functions of each part in switching and initial network entry.

 The Anchor DP function, located at one end of the data channel, anchors the data channel associated with the MS (Mobile Station), including the switching process. This function forwards the received data packet to the serving DP function using the first type or the second type of data channel. For MSs that are in the process of switching, this function provides buffers for data from the network and maintains state information about the bearers.

 Serving The DP function, located at the other end of the data channel, is associated with the service physical layer and the MAC layer function and is responsible for sending all messages to the MS. This function communicates with the Anchor DP function through the first type and the second type of data channel to forward or receive MS data packets.

 Target (new service) DP function: This function is associated with the target BS (Base Station) and interacts with the Anchor DP function to prepare a data channel to replace the current data channel after the handover is completed. After a successful switch, this function is converted to the service DP function.

 The Relaying DP function forwards information between the serving DP function and the Anchor DP function.

Within the data channel, depending on the classification accuracy, the upstream and downstream user data streams can be forwarded separately or in combination using different classification particles. Transfer user streams on one data channel There are three types of classification particles that can be used: In case 1, each traffic flow per user, that is, the best classification granularity, performs specific forwarding processing for each service flow of the user, passing through the ASN; Case 2 belongs to each user of a single user. Streams can be sent together in a single pass through the ASN; Case 3 Each functional entity, the coarsest granularity, flows from all users belonging to a BS can be sent together and passed through the ASN.

 In the prior art, after the user terminal accesses the network authentication in WiMax, the initial service flow and the data channel are established. The establishment, release or modification of the data channel is initiated by the Anchor or the target DPF and terminated by the Anchor or Serving DPF. The data channel pre-establishment, establishment and deregistration process is shown in Figure 2. The data channel function DPF is distributed in different network devices. The steps are as follows:

 In step s201, a DP setup request is usually sent by the target DP or anchor DP to the relay DP at one end of the data channel.

 Step s202: The relay DP forwards the DP establishment request to the other end of the data channel formed by the anchor DP or the Serving DP.

 In step s203, the other end anchor DP or Serving DP saves the mapping relationship of the data channel, and sends a DP setup response to the relay DP.

 Step s204: The relay DP sends the received DP setup response to the initiator of the target DP or anchor DP.

 Step s205, the originating target DP or anchor DP feeds back the DP feedback DP establishment confirmation Path Registration Acknowledge.

 Step s206, the relay DP will confirm the DP establishment Path Registration Acknowledge sends the uplink to the other end anchor DP or Serving DP.

 In the scenarios of initial network entry, ASN anchor mobility, CSN (Connected Service Network) anchor mobility, and exit from idle mode, it is necessary to establish a new data channel for the MS between related network entities.

When the serving ASN-GW and the anchor ASN-GW are the same network device, the serving DSN and the anchor DSN on the anchor ASN-GW will be established according to the DP granularity of the MS. Corresponding R6 DP tunnels, data from and to the MS will be carried over this DP tunnel. In the scenario where the ASN anchor mobility occurs in the MS and exits from the idle mode, the serving ASN-GW and the anchor ASN-GW may not be the same network device. In this scenario, when a corresponding DP tunnel is established for the MS, between the serving DPF on the BS and the relay DPF on the serving ASN-GW, and between the relay DPF on the serving ASN-GW and the anchor DPF on the anchor ASN-GW. The corresponding R6 DP tunnel and R4 DP tunnel will be established. According to the actual network deployment (for example, the interworking between the serving ASN-GW and the anchor ASN-GW may need to pass through multiple private networks, so that the gateway on the border between the private networks will serve as the relaying DPF relay DP message), when the MS is established. For the DP, one or more network devices with relaying DPF between the serving ASN-GW and the anchor ASN-GW may be required. There may be multiple tunnels between the serving ASN-GW and the anchor ASN-GW.

 Figure 3 is a schematic diagram of the ASN anchor mobility DP setup scenario. The left side is directly reachable by the serving ASN-GW and the anchor ASN-GW. The right side simplifies the scenario where multiple realying DPFs exist. When the MS is switched from BS1 to BS2, the specific situation is as follows: When the MS is under BS1, the data packet about the MS is transmitted through the R6 DP tunnel between the anchor ASN-GW and the BS1; when the MS is under the BS2, the MS The anchor point does not switch. The data about the MS is forwarded through the R4 DP tunnel between the anchor ASN-GW and the serving ASN-GW and the R6 DP tunnel between the serving ASN-GW and BS2. When the MS initiates a handover to BS2, the control plane signaling message established by the R4 DP and the R6 DP is forwarded by the serving ASN-GW (relay DPF).

 Figure 4 is a schematic diagram of the DP establishment and packet forwarding process in the ASN anchor mobility. The establishment of the DP can be initiated by the anchor ASN-GW or by the BS. The establishment process of DP s401~s406 is consistent with the process of steps s201~s206 in Figure 2, except that the network structure is refined and embodied. After the MS tunnel of the MS is established, you can start forwarding data packets to and from the MS on the data plane. The forwarding process of the upper and lower packets is as follows:

Step s407: After receiving the message sent to the MS, the anchor ASN-GW maps the message to the corresponding SFID (Service Flow Identifier) according to the corresponding classification rule (for example, a quintuple). Anchor ASN-GW The mapping between the service flow and the data channel obtained when the DP is established, and mapping the SFIDn to the corresponding DPIDm (Data Path Identifier), such as a GRE key, a LAN (Local Area Network) ID, and the like. The anchor ASN-GW encapsulates the received packet according to the tunnel type, and then forwards it to the serving ASN-GW through the R4 tunnel corresponding to the DPIDm.

 Step s408: After receiving the tunnel packet from the anchor ASN-GW, the Serving ASN-GW decapsulates the packet. The Serving ASN-GW then selects another tunnel to forward packets according to the mapping between the service flow and the data channel established in the DP tunnel establishment process (see Figure 5). Then, the serving ASN-GW re-encapsulates the decapsulated packet and forwards it to the BS through the tunnel corresponding to the DPIDp. After receiving the corresponding packet, the BS decapsulates the packet and transmits the packet to the MS according to the 802.16e air interface specification. deal with. If the MS sends uplink data, the forwarding process of the data packet is similar.

 The data plane structure diagram between the MS and the Home Agent (local agent) (if the DP tunnel uses GRE), as shown in Figure 6, the MS and the BS transmit information through the R1 air interface, and the BS and the Serving ASN-GW pass. The information is transmitted between the ASN-GW and the Anchor ASN-GW through the R4 DP tunnel, and the information is transmitted between the Anchor ASN-GW and the HA through R3. Corresponding to the packet forwarding process in Figure 4, the tunnel packet in Figure 6 needs to be encapsulated and decapsulated on the Serving ASN-GW.

In the process of implementing the present invention, the inventors have found that the prior art has the following disadvantages: In WiMax, the granularity of the DP tunnel is optimally differentiated according to the traffic flow. For a certain service flow of the MS, two DP tunnels of R4 DP and R6 DP need to be established (multiple R4 DP tunnels may also occur according to different network deployments), and it is required to be in the serving ASN-GW (if there are multiple tunnels, It also contains the corresponding tunnel translation entry on the GW that performs the relay DPF. The establishment of a DP tunnel is complicated, and the required signaling and maintenance overhead are also large. In addition, service flow and DP remapping and packet decapsulation and re-encapsulation are required on the serving ASN-GW, which greatly increases the processing burden of the serving ASN-GW. In some scenarios of network deployment, the establishment of multiple tunnels is required, but If the BS and the anchor ASN-GW are directly reachable, the establishment of multiple tunnels will cause a burden on the intermediate router.

Summary of the invention

 The embodiments of the present invention provide a method, a system, and a device for establishing a data channel in a wireless network, which reduce the burden of processing the ASN-GW by changing the DP tunnel establishment mechanism.

 An embodiment of the present invention provides a method for establishing a data channel in a wireless network, including: determining whether a source node and a destination node have a direct reachable route, and if yes, sending a data channel DP setup request message, where the DP setup request message includes direct a reachable route indication and a DP endpoint identifier, where the DP endpoint identifier is a DP identifier of the source node, and a DP setup response message is received, where the DP endpoint identifier in the DP setup response message is a DP identifier of the destination node, and the DP The setup response message contains a direct reachable route indication.

 The embodiment further provides a source node, including:

 a determining unit (811) (911), configured to determine whether the source node and the target node have direct reachable routes;

 a setting unit (812) (912), configured to set a related indication bit in the DP establishment request message according to the judgment unit judgment result, and establish a DP establishment request message;

 The executing unit (813) (913) is configured to send the DP setup request message to the relay node, and receive the DP setup response message; or directly send the DP setup request message to the destination node.

 The embodiment of the invention further provides a relay node, including:

 The determining unit (831) is configured to determine, according to the relevant indication bit in the DP setup request message, whether the source node and the destination node directly establish a DP tunnel, or determine whether the source node and the destination node have direct access when the DP setup request message has no relevant indication bit. Routing

 The executing unit (832) is configured to: when the determining unit determines that the source node and the destination node have a direct reachable route, set the corresponding DP endpoint identifier to perform packet transmission and reception processing.

The embodiment of the invention further provides a destination node, including: a determining unit (821) (921), configured to determine, according to the DP endpoint identifier in the DP setup request message, whether the destination node and the source node directly establish a tunnel; or, according to the relevant indication bit in the DP setup request message, determine whether the destination node and the source node have The direct reachable route; the execution unit (822) (922) is configured to establish a DP tunnel according to the judgment result of the determining unit, and perform transceiving processing.

 The embodiment of the invention further provides a wireless network system, comprising: a source node (810) (910) and a destination node (820) (920).

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

 In the process of establishing a data channel, when there is a direct reachable route between the BS and the anchor ASN-GW, the serving ASN-GW does not need to perform DP remapping and encapsulation and decapsulation of the 4 艮 text, or even serving ASN-GW. Participate in the DP establishment and packet forwarding process, greatly reducing the processing burden on the serving ASN-GW. DRAWINGS

 1 is a schematic diagram of mobility management of an ASN anchor point in the prior art;

 2 is a flow chart of data channel pre-establishment, establishment and deregistration in the prior art; FIG. 3 is a schematic diagram of a prior art ASN anchor mobility DP setup scenario; FIG. 4 is a DP in the prior art ASN anchor mobility Establish and message forwarding flow chart;

 5 is a schematic diagram of a mapping relationship between a service flow and a data channel in the prior art; FIG. 6 is a data plane structure diagram between the MS and the HA in the prior art;

 7 is a flowchart of a method for establishing a data channel tunnel according to an embodiment of the present invention; FIG. 8 is a flowchart of a method for establishing a data channel tunnel according to Embodiment 2 of the present invention; FIG. 9 is a flowchart of a method for establishing a data channel tunnel according to Embodiment 3 of the present invention; 10 is a flowchart of a method for establishing a data channel tunnel according to an embodiment of the present invention; FIG. 11 is a schematic diagram of a DP setup scenario when an ASN is switched between MSs according to an embodiment of the present invention;

12 is a data plane structure diagram of an MS and an HA in an embodiment of the present invention; FIG. 13 is a schematic structural diagram of a wireless network system according to an embodiment of the present invention; FIG. 14 is a schematic structural diagram of a source node according to an embodiment of the present invention; FIG.

 15 is a schematic structural diagram of a relay node according to an embodiment of the present invention;

 16 is a schematic structural diagram of a destination node according to an embodiment of the present invention;

 17 is a schematic structural diagram of another wireless network system according to an embodiment of the present invention; FIG. 18 is a schematic structural diagram of another source node according to an embodiment of the present invention;

 FIG. 19 is a schematic structural diagram of another destination node according to an embodiment of the present invention. detailed description

 The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

 In the scenario where the handover and the MS exit from the idle mode, the Anchor ASN-GW is separated from the Serving ASN-GW. When a data bearer channel is established for the MS, two or more tunnels are established between the BS and the Anchor ASN-GW. The relay routers at each tunnel end point will undertake heavy packet decapsulation and re-encapsulation operations.

 If the IP route between the BS and the Anchor ASN-GW is reachable (for example, both the BS and the Anchor ASN-GW have global routable addresses or both in the same management domain), then we will directly establish a relationship between the BS and the Anchor ASN-GW. The tunnel does not need to be the two tunnels between the BS and the Serving ASN-GW, the Serving ASN-GW and the Anchor ASN-GW in the existing scheme, so that the packet processing pressure on the Serving ASN-GW can be buffered.

 In the message established by the WiMax DP (such as Path_Reg_Req, Path_Prereg_Req), the relevant indication bit is added to identify whether there is a direct reachable route between the BS and the Anchor ASN-GW. When the BS or the Anchor ASN-GW initiates the DP establishment, the DP related request bit may be carried in the DP setup request message, and the indication bit is set to a corresponding value, such as "1", indicating that there is a relationship between the BS and the Anchor ASN-GW. Direct reachable route; set to "0", indicating that there is no direct reachable route between the BS and the Anchor ASN-GW.

A first embodiment of the present invention provides a method for establishing a data channel in a wireless network, where the relay node is a serving gateway, the source node is a base station, and the destination node is an anchor gateway; or The source node is an anchor gateway and the destination node is a base station. The process shown in Figure 7 includes the following steps:

 Step s701: The source node sends a data channel DP establishment request message to the destination node by using the relay node.

 Step s702: The relay node determines, according to the DP setup request message, whether the source node and the destination node have a direct reachable route; if yes, the DP end identifier in the DP setup request message is set as the DP identifier of the source node; and the DP setup request is forwarded. a message to the destination node; step s703, the destination node replies to the relay node with a DP setup response message; step s704, the relay node 4 determines whether there is a direct reachable route between the source node and the destination node according to the DP setup response message; Then, the DP end identifier in the DP setup response message is set as the DP identifier of the destination node, and is forwarded to the source node.

 The second embodiment of the present invention is to apply the first embodiment to the BS-initiated DP establishment process, and the flow is the same as the process in which the anchor ASN-GW initiates the DP establishment. The process is shown in Figure 8, which includes the following steps:

 Step s801: When the BS initiates the DP establishment, a corresponding indication bit is added in the DP setup request message to indicate whether the BS and the Anchor ASN-GW have direct reachable routes. Whether or not there is a direct reachable route can be achieved through direct BS judgment, static configuration, or other means.

 Step s802, the Serving ASN-GW receives the DP setup request message from the BS. The Serving ASN-GW checks whether the relevant indication bit is included in the message, and if so, determines whether there is a direct reachable route between the BS and the Anchor ASN-GW according to the relevant indication bit. The DP setup request message is then relayed to the Anchor ASN-GW for DP setup.

 Before the relay DP establishes the request message to the Anchor ASN-GW, the Serving ASN-GW may perform the following operations: The DP setup request message sent to the Anchor ASN-GW needs to include the data channel endpoint identifier, if the BS and the Anchor have If the route is directly reachable, the identifier should be set to the BS data channel identifier, that is, the source node data channel identifier.

Step s803, the number of the Anchor ASN-GW received from the Serving ASN-GW According to the channel establishment message, DP establishment starts according to the data channel identification.

 The Anchor ASN-GW returns a data channel setup response message to the Serving ASN-GW. The data channel setup response message may include an indication bit of whether the Anchor ASN-GW and the BS have direct reachable routes.

 Step s804, the Serving ASN-GW receives the DP setup response message from the Anchor. Then, the relay DP establishes a response message to the BS, and the response message may include the above related indication bit. Before the relay DP establishes a response message to the BS, the Serving ASN-GW may perform the following operations: The DP setup response message sent to the BS needs to include the data channel endpoint identifier, and if there is a direct reachable route between the BS and the Anchor, This flag should be set to the Anchor ASN-GW data channel ID.

 Step s805, the DP establishes a confirmation process between the ASN-GW and the Anchor ASN-GW.

 The third embodiment of the present invention provides a method for establishing a data channel in a wireless network. The Serving ASN-GW determines whether there is a direct reachable route between the source node and the destination node, and sets related indication bits to modify the data channel identifier, as shown in FIG. 9. As shown, the method includes the following steps: Step s901: The BS sends a DP setup request message to the Serving ASN-GW.

 Step s902, the Serving ASN-GW receives the DP setup request message from the BS. The Serving ASN-GW checks whether the message contains a relevant indication bit to indicate whether the BS and the Anchor ASN-GW have direct reachable routes. If not included, the Serving ASN-GW needs to perform the following operations before sending the DP setup request message to the anchor: Add a corresponding indication bit to the message to indicate whether the BS and the Anchor ASN-GW have direct reachable routes. Whether or not there is a direct reachable route can be directly determined by Serving ASN-GW, static configuration or other means.

 The DP setup request message sent to the Anchor ASN-GW shall include the data channel endpoint identifier. If there is a direct reachable route between the BS and the anchor, the identifier shall be set to the BS data channel identifier.

Step s903: The Anchor ASN-GW receives the data channel setup message from the Serving ASN-GW, and starts DP establishment according to the related indication bit and the data channel identifier in the message. If the data channel identifier in the received data channel setup message is the BS label At the time of identification, the Anchor ASN-GW began to establish a direct data channel to the BS.

 The Anchor ASN-GW returns a data channel setup response message to the Serving ASN-GW. The data channel setup response message may contain associated indication bits for whether it has a direct reachable route with the BS.

 Step s904, the Serving ASN-GW receives a DP setup response message from the Anchor. The relay DP establishes a response message to the BS, and the response message may include the above related indication bits. Before the relay DP establishes a response message to the BS, the Serving ASN-GW may perform the following operations: The DP setup response message sent to the BS needs to include the data channel endpoint identifier, and if there is a direct reachable route between the BS and the Anchor, This flag should be set to the Anchor ASN-GW data channel ID.

 Step s905: The DP establishes a confirmation process between the BS, the Serving ASN-GW and the Anchor ASN-GW.

 Embodiment 4 of the present invention provides a method for establishing a data channel in a wireless network, where a source node is a base station, a destination node is an anchor gateway, or a source node is an anchor gateway, and a destination node is a base station.

 In this embodiment, the source node BS carries the relevant indication bit, and directly initiates the DP establishment to the destination node anchor ASN-GW as an example. The process of the anchor ASN-GW initiating the DP establishment is the same as the process. The improved process is shown in Figure 10, including the following steps:

 Step slOOl, when the BS initiates the DP establishment, the corresponding establishment indication bit is added in the DP establishment request message to indicate whether the BS and the Anchor ASN-GW have a direct reachable route. Whether or not the direct reachable route can be directly determined by the BS, static configuration, or other means; the IP source address and the destination address of the DP setup request message are the addresses of the BS and the Anchor ASN-GW, respectively.

 Step sl002, the Anchor ASN-GW receives the data channel establishment message from the BS, and starts DP establishment according to the above related indication bit in the message. If the above related indication bit indicates that there is a direct reachable route between the BS and the Anchor, the Anchor ASN-GW starts to establish a direct data channel to the BS.

The Anchor ASN-GW returns a data channel setup response message to the BS. The data channel setup response message includes an indication bit of whether it has a direct reachable route with the BS. The IP source address and destination address of the DP establishment response message are the addresses of the Anchor ASN-GW and the BS, respectively.

 Step sl003, the DP establishes a confirmation process between the BS and the Anchor ASN-GW. Through the description of the foregoing embodiment, the DP setup scenario for implementing ASN anchor mobility by using the present invention is as shown in FIG. 11. When there is a direct reachable route between the source node and the destination node, the serving gateway uplink and downlink are directly As a tunnel connecting the source node and the destination node, the service gateway does not perform encapsulation and decapsulation processing. The difference between Embodiments 1 and 2 of the present invention and Embodiment 3 and Embodiment 4 is: The former is determined by the source node BS (or anchor ASN-GW) whether there is a direct connection between the destination node anchor ASN-GW (or BS). To reach the route, and set the relevant indication bit, the serving ASN-GW needs to terminate the received DP message (the source IP address of the message is the source node address, the destination address is the service gateway address), and the data channel endpoint identifier is set to generate The new DP message text, the source address of the IP header of the WiMax message is changed to the IP address of the service gateway, and the destination address of the WiMax message is modified to the IP address of the base station or anchor gateway to be sent; In the third example, the serving ASN-GW determines whether the source node and the destination node have a direct reachable route, and adds a corresponding identifier or option to the DP message and sets the data channel endpoint identifier. The core of the system is the serving gateway serving ASN-GW; In the fourth embodiment, the source node BS (or anchor ASN-GW) determines whether there is a direct reachable route between the destination node anchor ASN-GW (or BS), and sets the relevant indicator. The knowledge or option is sent directly to the destination node, and the serving ASN-GW does not participate in the operation.

 When the DP and the anchor ASN-GW can directly establish a DP, that is, the data plane structure when there is only one tunnel is as shown in FIG. 12 (if the DP tunnel uses GRE), compared with the data bearer between the MS and the HA in FIG. 6 in the prior art. In the embodiment, the ASN GW (service ASN-GW) in Figure 12 no longer needs to perform packet decapsulation and encapsulation processing.

 The embodiment of the present invention further provides a wireless network system. As shown in FIG. 13, the method includes: a source node 810, a destination node 820, and a relay node 830.

 The source node 810 is configured to send a DP setup request message to the target node 820 through the relay node 830.

The relay node 830 is configured to receive a DP setup request message sent by the source node 810. And receiving the DP setup response message sent by the destination node 820, and determining whether there is a direct reachable route between the source node 810 and the destination node 820; if yes, modifying the DP endpoint identifier in the DP setup request message to be the DP identifier of the source node 810 And modifying the DP endpoint identifier in the DP setup response message as the DP identity of the destination node 820; then forwarding the DP setup request message to the destination node 820, and forwarding the DP setup response message to the source node 810;

 The destination node 820 is configured to directly establish a tunnel connection with the source node 810 according to the DP identifier.

 As shown in FIG. 14, the source node 810 specifically includes:

 The determining unit 811 is configured to determine whether the source node 810 and the target node have direct reachable routes;

 The request message setting unit 812 is configured to set a related indication bit in the DP establishment request message according to the judgment result of the determining unit 811, and establish a request message;

 The request message execution unit 813 is configured to send a DP setup request message to the relay node 830, and receive a DP setup response message.

 As shown in FIG. 15, the relay node 830 specifically includes:

 The determining unit 831 is configured to determine, according to the relevant indication bit in the DP setup request message, whether the source node 810 and the destination node 820 directly establish a DP tunnel, or determine, by the relay node 830, the source node 810 and the DP setup request message without the relevant indication bit. Whether the destination node 820 has a direct reachable route, and sends a DP setup request message to the destination node 820 to carry the relevant indication bit;

 The executing unit 832 is configured to modify the corresponding DP endpoint identifier when the determining unit 831 determines that the source node 810 and the destination node 820 have direct reachable routes, and perform packet processing.

 As shown in FIG. 16, the destination node 820 specifically includes:

 The determining unit 821 is configured to determine, according to the DP endpoint identifier in the DP setup request message, whether the destination node 820 and the source node 810 directly establish a tunnel;

 The executing unit 822 is configured to establish a DP tunnel according to the judgment result of the determining unit 821, and perform packet transmission and reception processing.

The embodiment of the invention further provides a wireless network system, as shown in FIG. 17, comprising: The source node 910 is configured to determine whether there is a direct reachable route between the destination node 920, and if yes, set a related information indication bit in the request message.

 The destination node 920 is configured to determine, according to the related information indicator bit, whether the DP is directly established with the source node 910.

 As shown in FIG. 18, the source node 910 specifically includes:

 The determining unit 911 is configured to determine whether there is a direct reachable route between the destination node 920 and the destination node 920 before establishing the DP;

 The establishment message setting unit 912 is configured to set a related indication bit in the DP establishment request message;

 A message execution unit 913 is configured to send a DP setup request message directly to the destination node 920.

 As shown in FIG. 19, the destination node 920 specifically includes:

 The determining unit 921 is configured to determine, according to the related indicator bit in the DP setup request message, whether the node 920 and the source node 910 have direct reachable routes;

 The executing unit 922 is configured to establish a DP tunnel according to the judgment result of the determining unit, and process the sending and receiving of the packet.

 In the embodiment of the present invention, in the process of establishing a data channel, when there is a direct reachable route between the BS and the anchor ASN-GW, the serving ASN-GW does not need to perform DP remapping and packet encapsulation and decapsulation, or even The serving ASN-GW is not involved in the DP establishment and text forwarding process, and the processing load on the serving ASN-GW is greatly reduced. Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware, or can be implemented by means of software plus necessary general hardware platform, and the technical solution of the present invention. It can be embodied in the form of a software product that can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for making a computer device (may It is a personal computer, server, or network device, etc.) method of performing various embodiments of the present invention.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. The scope of protection of the invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request  A method for establishing a data channel in a wireless network, comprising: determining whether a source node and a destination node have a direct reachable route, and if yes, sending a data channel DP setup request message, where the DP setup request message includes a direct reachable route indication and a DP endpoint identifier, where the DP endpoint identifier is a DP identifier of the source node, and a DP setup response message is received, where the DP endpoint identifier in the DP setup response message is a DP identifier of the destination node, The DP setup response message contains a direct reachable route indication.  The method according to claim 1, wherein the determining whether the source node and the destination node have direct reachable routes is specifically a source node determines whether the source node and the destination node have direct reachable routes,  The sending the DP setup request message is specifically: the source node sends a DP setup request message to the relay node, so that the relay node sets the DP endpoint identifier in the setup request message to be the DP identifier of the source node, and then sends the message to the destination. Node  The receiving DP setup response message is specifically that the source node receives a DP setup response message from the relay node, and the DP endpoint identifier in the DP setup response message is set by the relay node.  The method according to claim 1, wherein the determining whether the source node and the destination node have direct reachable routes is specifically a source node determines whether the source node and the destination node have direct reachable routes.  The sending a DP setup request message is specifically: the source node sends a DP setup request message to the destination node;  The receiving DP setup response message is specifically that the source node receives the DP setup response message from the destination node.  The method according to claim 1, wherein the determining whether the source node and the destination node have a direct reachable route is specifically a relay node determining whether the source node and the destination node have direct reachable routes, Before the determining whether the source node and the destination node have a direct reachable route, the method further includes: the relay node receiving a DP setup request message of the source node, where the DP is established The request message does not include a direct reachable route indication;  The sending a DP setup request message is specifically that the relay node sends a DP setup request message to the destination node;  The receiving DP setup response message is specifically that the relay node receives a DP setup response message from the destination node;  After the receiving the DP setup response message, the method further includes: the relay node sending a DP setup response message to the source node.  The method according to claim 1, wherein the source node and the destination node have a direct reachable route, including:  The source node and the destination node both have global routable addresses or are in the same management domain.  6. A source node, comprising:  a determining unit (811) (911), configured to determine whether the source node and the target node have direct reachable routes;  a setting unit (812) (912), configured to set a related indication bit in the DP establishment request message according to the judgment unit judgment result, and establish a DP establishment request message;  The executing unit (813) (913) is configured to send the DP setup request message to the relay node, and receive the DP setup response message; or directly send the DP setup request message to the destination node.  7. A relay node, comprising:  The determining unit (831) is configured to determine, according to the relevant indication bit in the DP setup request message, whether the source node and the destination node directly establish a DP tunnel, or determine whether the source node and the destination node have direct access when the DP setup request message has no relevant indication bit. Routing  The executing unit (832) is configured to: when the determining unit determines that the source node and the destination node have direct reachable routes, set a corresponding DP endpoint identifier, and perform packet processing.  8. A destination node, comprising: a determining unit (821) (921), configured to determine, according to the DP endpoint identifier in the DP setup request message, whether the destination node and the source node directly establish a tunnel; or, according to the relevant indication bit in the DP setup request message, determine whether the destination node and the source node have Direct reachable route; The execution unit (822) (922) is configured to establish a DP tunnel according to the judgment result of the judging unit, and perform transceiving processing.  A wireless network system, comprising: the source node (810) (910) of claim 6 and the destination node (820) (920) of claim 8.  10. The system of claim 9, further comprising the relay node (830) of claim 7.