CN101272315B - Packet data package transmission method, system and network appliance - Google Patents

Abstract

Packet transmission method, system and network device. Obtain at least two session management contexts of the user terminal; configure tunnels for each radio access bearer in the session management context; establish radio bearers for packet data packets that need to be transmitted, and allocate resources, performing packet data packet transmission between the user terminal and the core network according to the radio bearer and the tunnel after resource allocation. By configuring tunnel information for each radio access bearer of the user terminal during the transition from the idle state to the active state of the user terminal, it is possible to avoid subsequent packet transmission between the user terminal and the core network through other radio access bearers When receiving data packets, the signaling interaction process caused by the need to obtain tunnel information and quality of service parameters related to radio access bearers saves resources on the network side and shortens the delay in establishing radio access bearers.

Description

Packet transmission method, system and network device

technical field

The invention relates to the technical field of network communication, in particular to a packet data packet transmission method, system and network equipment. the

Background technique

Whether it is in the network architecture that 3GPP has determined or the evolving network architecture that is being studied, the Service Request (service request) process is an important process for the user terminal from the idle state to the active state. The Service Request process is divided into two types: the Service Request process initiated by MS, and the Service Request process initiated by the network. the

In the network architecture determined by 3GPP, the Service Request process initiated by the MS is: when an idle user terminal needs to send uplink signaling or data, it first initiates the Service Request process to establish a signaling connection with the network side; if If the user terminal needs to transmit data, it needs to further complete the restoration of the IP bearer through the service request process, that is, rebuild the wireless bearer between the user terminal and the access network, and restore the tunnel between the access network and the core network. The Service Request process initiated by the network is: when the core network has data or signaling that needs to be sent to the user terminal in the idle state, the user terminal is first paged, and the user terminal that receives the paging message responds to the network side with the Service Request process. Paging, to establish a signaling connection with the network side through the service request process; if the core network needs to send downlink data to the user terminal, it needs to further complete the recovery of the IP bearer through the service request process, that is, to rebuild the user terminal and the connection Radio bearer between incoming networks, and restoration of tunnels between access network and core network. the

In the Service Request process of the determined network architecture, the user terminal establishes a radio bearer between itself and the RNC according to the RB ID (radio bearer identifier) indicated by the RNC and the corresponding RAB ID (radio access bearer identifier), and the The RNC allocates resources for the newly created RAB. the

In the Service Request process of the 3GPP evolved network architecture, the access network establishes a radio bearer with the user terminal according to the user terminal context information sent by the core network control plane entity MME (mobility management entity) and the bearer information to be established, and Allocate resources for the newly created RAB. the

The inventor discovered during the invention process that no matter in the determined network architecture or the evolved network architecture, the service request process is to establish corresponding radio access bearer resources in the access network according to the radio bearer corresponding to the uplink data or downlink data , such as establishing designated radio access bearer resources on the S1-U or Iu interface; while other radio bearers do not perform the radio access bearer establishment process on the S1-U or Iu interface. In this way, for subsequent services of other radio bearers, the network side still needs to establish radio access bearers first, and then the access network node allocates radio resources to establish radio bearers. Therefore, the user terminal needs to perform multiple information exchanges with the network side, which wastes network resources and makes the time delay generated in the radio bearer establishment process too long. the

Contents of the invention

Embodiments of the present invention provide a packet data packet transmission method, system, and network equipment, which avoid as much as possible the need to obtain the tunnel information of the relevant radio access bearer when transmitting data between the subsequent user terminal and the core network through other radio access bearers. The signaling interaction process caused by , quality of service parameters, etc., saves resources on the network side and shortens the delay in establishing the wireless access bearer. the

The grouping data packet transmission method that the embodiment of the present invention provides, comprises:

Obtain at least two session management contexts of the user terminal;

Configuring tunnels for each radio access bearer in the session management context;

Establishing a radio bearer for the packet data packet to be transmitted, and allocating resources for the tunnel that needs to transmit the packet data packet, and performing packet data packet transmission between the user terminal and the core network according to the radio bearer and the resource-allocated tunnel.

The packet data packet transmission system provided by the embodiment of the present invention includes: an access network side and a core network side, the access network side is provided with a first module, a second module, a fourth module and a seventh module, and the core The grid side is equipped with a third module, a fifth module, a sixth module and an eighth module;

The first module: used to obtain at least two session management contexts of the user terminal;

The second module: used to configure access network side tunnels for each radio access bearer in the session management context acquired by the first module;

The third module: used to configure the core network side tunnel for each wireless access bearer of the user terminal;

The fourth module: establish a wireless bearer for the packet data packet that needs to be transmitted, and allocate resources for the access network side tunnel that needs to transmit the packet data packet;

The fifth module: used to store the session management context of the user terminal, and provide at least two session management contexts of the user terminal for the first module;

The sixth module: used to determine the core network side tunnels that need to transmit packet data packets, and allocate resources for the core network side tunnels that need to transmit packet data packets;

The seventh module and the eighth module: used for performing packet data packet transmission between the user terminal and the core network according to the established radio bearer and tunnel. the

The embodiment of the present invention also provides a network device, the network device is located on the access network side, and the network device is provided with a first module, a second module, a fourth module and a seventh module;

The first module: used to obtain at least two session management contexts of the user terminal;

The second module: used to configure access network side tunnels for each radio access bearer in the session management context acquired by the first module;

The fourth module: establish a wireless bearer for the packet data packet that needs to be transmitted, and allocate resources for the access network side tunnel that needs to transmit the packet data packet;

The seventh module: used for performing packet data packet transmission according to the established radio bearer and the access network side tunnel. the

The embodiment of the present invention also provides a network device, the network device is provided with a fifth module;

The fifth module: used for storing the session management context of the user terminal, and sending at least two session management contexts of the user terminal to the access network side. the

The embodiment of the present invention also provides a network device, the network device is provided with a third module, a sixth module and an eighth module;

The third module: used to configure the core network side tunnel for each wireless access bearer of the user terminal;

The sixth module: used to determine the core network side tunnels that need to transmit packet data packets, and allocate resources for the core network side tunnels that need to transmit packet data packets;

The eighth module: used for performing packet data packet transmission according to the core network side tunnel. the

From the description of the above technical solution, it can be seen that in the process of providing services for the user terminal in the embodiment of the present invention, at least two—such as all session management contexts of the user terminal are obtained, and each wireless access in the session management context Tunnels are assigned to bearers. Therefore, when other radio access bearers of active user terminals need to be used to implement services, the previously allocated tunnels can be used to avoid conflicts between user terminals and the network side for establishing radio access bearers. The signaling interaction performed not only saves valuable network side resources, but also avoids the delay in establishing the wireless access bearer caused by the signaling interaction. the

Description of drawings

Fig. 1 is a flow chart one of the data transmission method of the embodiment of the present invention;

Fig. 2 is the flow chart two of the data transmission method of the embodiment of the present invention;

Fig. 3 is the flow chart three of the data transmission method of the embodiment of the present invention;

Fig. 4 is the flow chart four of the data transmission method of the embodiment of the present invention;

Fig. 5 is a flow chart five of the data transmission method of the embodiment of the present invention;

Fig. 6 is the flow chart six of the data transmission method of the embodiment of the present invention;

FIG. 7 is a seventh flowchart of a data transmission method according to an embodiment of the present invention. the

Detailed ways

If in the process of providing services for a user terminal, at least two tunnels are assigned to the user terminal—for example, each radio access bearer in all session management contexts is allocated with a tunnel ID, etc., then the active user terminal needs to be used When other wireless access bearers are used to implement services, the previously allocated tunnels can be used to avoid the signaling interaction between the access network and the core network side in order to obtain tunnel information and quality of service parameters of related wireless access bearers. This saves valuable network-side resources, and avoids the delay in establishing radio access bearers caused by signaling interaction. The embodiment of the present invention can acquire at least two of the user terminal—such as all session management contexts—and allocate tunnels for each radio access bearer in the session management context during the transition of the user terminal from the idle state to the active state. The embodiment of the present invention can also be used in other application scenarios to obtain at least two user terminals—such as all session management contexts, and the process of allocating tunnels; for example, the user terminal needs to perform a certain specific service and switch from idle state to active state In the state process, the process of obtaining at least two user terminals—such as all session management contexts, and allocating tunnels is carried out. the

The packet data transmission method according to the embodiment of the present invention will be described below by taking the application scenario where the user terminal transitions from the idle state to the active state and obtaining all session management contexts of the user terminal as an example. the

When the user terminal in the idle state needs to send uplink packet data packets, or the network side needs to send downlink packet data packets to the user in the idle state, the user terminal needs to switch from the idle state to the active state. The packet data packet here is a PDU, and the packet data packet may include data or signaling. the

During the transition of the user terminal from the idle state to the active state, the access network node needs to obtain all session management contexts of the user terminal. The access network node can obtain all session management contexts of the user terminal from the core network side, for example, the core network node transmits all session management contexts of the user terminal to the access network node through a context establishment request message. The specific content contained in the session management context may be the content contained in the session management context in the prior art, and the embodiment of the present invention does not limit the specific content contained in the session management context. the

After receiving all the session management contexts of the user terminal, the access network node establishes the context locally, and configures tunnels for each radio access bearer in all session management contexts, that is, configures tunnel identifiers for each radio access bearer, etc. . the

The transition of the user terminal from the idle state to the active state indicates that the user terminal needs to transmit uplink packet data packets, or the user terminal needs to receive downlink packet data packets, so the access network node also needs to determine the tunnel to be used for this state transition. The access network node may determine the tunnel to be used according to the information transmitted from the user terminal, and the access network node may also determine the tunnel to be used according to the information transmitted from the core network side. The information here may be a bearer status indication information element, or a radio bearer ID, or a radio access bearer ID, and the like. After the access network node determines the tunnel according to the received information, it allocates resources for the tunnel and establishes a wireless bearer between it and the user terminal, so that the uplink/downlink packet data packets can be transmitted between the user terminal and the access network node. transmission. Similarly, the core network side also needs to determine the tunnel to be used for this service. The core network side can determine the tunnel to be used according to the downlink data to be sent, and the core network side can also determine the tunnel to be used according to the information transmitted from the user terminal. Then, the core network side allocates resources for the tunnel, so that uplink/downlink packet data packets can be transmitted between the core network and the access network nodes. the

It should be noted that the radio bearer and radio access bearer in this embodiment are only names used for convenience of description. The two names of radio bearer and radio access bearer cannot limit the scope of application of the embodiments of the present invention, that is, there may be no names of radio bearer and radio access bearer in some systems, but it cannot be considered that the present invention implements The technical solution in the method cannot be applied to these systems. The radio bearer in the embodiments of the present invention refers to the bearer between the access network and the user terminal, and the radio access bearer refers to the bearer between the access network and the core network. Both the radio bearer and the radio access bearer may have identification information, and the two identifications may be the same or different. Radio bearers and radio access bearers may be collectively referred to as bearers. the

After the above-mentioned user terminal transitions from the idle state to the active state, the access network node obtains all session management contexts of the user terminal, and establishes all session management contexts locally, and also provides The inbound bearer is configured with tunnel information. In this way, when the user terminal in the activated state needs to perform other services, and the context corresponding to the service is the context already obtained by the access network node, the access network node does not need to obtain the corresponding context from the core network side, but directly It only needs to allocate resources for the tunnel corresponding to the service and establish a radio bearer with the user terminal. That is to say, when the service that the user terminal needs to perform is a service that has been used before, the embodiment of the present invention prevents the access network node from communicating with the core network side in order to obtain the tunnel information and service quality parameters of the relevant wireless access bearer. signaling interaction. The other services here may be a service of sending uplink packet data packets by the user terminal, or a service of sending downlink packet data packets from the core network side to the user terminal. Moreover, when the user terminal needs to perform other services, it can directly send a request to the access network node, such as sending a radio bearer establishment request, without sending a service request to the core network side; after receiving the radio bearer establishment request, the access network node , directly establish a radio bearer and allocate resources for the corresponding tunnel, after that, the UE can send an uplink packet data packet through the radio bearer, and the uplink packet data packet can be transmitted to the core network side through the radio bearer and the resource-allocated tunnel. When the core network needs to send a downlink packet to the user terminal, it can directly allocate resources for the corresponding tunnel, and transmit the downlink packet to the access network node through the resource-allocated tunnel, and the access network node receives the downlink packet After receiving the data packet, establish a radio bearer with the user terminal, and then, the downlink packet data packet can be transmitted to the user terminal through the radio bearer. the

The process of establishing a radio access bearer and the process of transmitting packet data according to the established radio access bearer in the embodiment of the present invention will be described below with reference to the accompanying drawings. the

When the MS initiates the Service Request process, the process of establishing the radio access bearer and the process of packet data packet transmission according to the established radio access bearer are shown in Figure 1. the

In Fig. 1, in step 1, the MS (user terminal) sends a service request message to the core network control plane node through the established wireless connection. Core network control plane nodes such as MME. The service request type in the service request message can be signaling or data. If the service request type is data, the MS may carry a "bearer status indication information element" in the service request message, which may be used to indicate the radio access bearer that needs to transmit the uplink packet data packet.

Step 2: After receiving the service request message, the core network control plane node sends all session management contexts related to the MS and the bearer status indication information element obtained from the MS to the access network node such as eNB. The core network control plane node may send the above information to the access network node through a context establishment request message or a radio access bearer establishment request message. All session management contexts here may include: all bearer identifiers, core network side tunnel IDs corresponding to each bearer identifier, service SAE gateway node addresses corresponding to each bearer identifier, QoS (quality of service) parameters of bearers corresponding to each bearer identifier, etc. The bearer identifier here may be a radio access bearer identifier. the

Step 3. The access network node locally establishes the MS-related context according to all session management contexts in the context establishment request/access bearer establishment request message sent by the core network control plane node, and according to the bearer status indication in the message Corresponding radio bearers are established between the cells and the MS. The process of establishing the radio bearer in step 3 can also be performed after step 4 or step 5. the

Step 4. The access network node allocates the corresponding access network side tunnel ID for each radio access bearer according to the locally established MS-related context, and configures the corresponding access network side tunnel ID according to the core network side tunnel ID and the corresponding core network user plane node. Uplink tunnel; then, the access network node reports the tunnel ID on the access network side and the address of the access network node to the core network control plane node through a response message. The response message here is a context establishment complete response message, or an access bearer establishment complete response message, and the like. the

Step 5: The core network control plane node sends an update session context request or an update bearer request message to the corresponding core network user plane node. The update session context request/update bearer request message may carry the address of the access network node, all tunnel IDs on the access network side obtained from the access network node, and the bearer status indication information element obtained from the MS. The corresponding core network user plane node configures the downlink tunnels of all radio access bearers of the MS according to the received tunnel ID on the access network side and the address of the access network node, and indicates that the cell is the corresponding radio access bearer according to the received bearer status. Inbound bearer configuration resources and QoS parameters. Finally, the core network user plane node returns a response message to the core network control plane node. the

After the radio access resources of all the bearers of the MS are established through the method shown in Figure 1 above, the MS sends a message to other bearers that have bearer context information but have no radio bearers to the access network node in the activated state. In the case of uplink packet data packets, the transmission process of uplink packet data packets includes: the MS reports the corresponding bearer ID or bearer status indication information element to the access network node by using access layer signaling such as a radio bearer establishment request, and the bearer ID or bearer status indication The information element can be used to indicate the bearer that needs to transmit the uplink packet. After receiving the bearer ID or bearer status indication information element, the access network node searches locally for the context information of the corresponding wireless access bearer, and then configures the wireless interface on the S1-U interface according to the QoS parameters in the found context information. Enter bearer resources, and establish corresponding radio bearers with user terminals. The user terminal sends the uplink packet data packet to the access node through the established radio bearer, and the access network node transmits the uplink packet data packet to the core network user plane node through the resource-configured radio access bearer. The core network user plane node can look up the corresponding radio access bearer ID and QoS parameters according to the tunnel ID corresponding to the received uplink packet data packet, and according to the found QoS parameters, etc. The tunnel configuration resource. The core network user plane node sends the uplink packet through the resource-configured core network side tunnel. the

From the description of the above embodiments, it can be known that in the embodiments of the present invention, when the user terminal transitions from the idle state to the active state, the context of each radio access bearer is established on the access network side, and each radio access bearer is assigned a Tunnel ID, so when the subsequent user terminal needs to use other radio access bearer services, the access network side no longer needs to perform the information exchange process with the core network side to establish the radio access bearer, thereby avoiding the data type of the MS sending The service request message, the core network initiates the corresponding radio access bearer assignment according to the service request message, and the access network node establishes the corresponding radio bearer, which avoids information interaction as much as possible and shortens the time for establishing the radio access bearer as much as possible. delay. the

When the network side initiates the Service Request process, the wireless access bearer establishment process and the process of packet data packet transmission according to the established wireless access bearer are shown in Figure 2. the

In Fig. 2, step 1, after receiving the downlink packet data packet, the core network user plane node sends a message such as a bearer establishment request or a bearer reestablishment request or a downlink packet arrival notification to the core network control plane node. The above message carries a bearer status indication information element, and the bearer status indication information element may be used to indicate a radio access bearer that needs to transmit downlink packet data packets.

Step 2: The core network control plane node sends a context establishment request message or an access bearer establishment request message to the access network node. The context establishment request message or the access bearer establishment request message carries all session management contexts related to the MS and the bearer state indication information element obtained from the core network user plane node. All session management contexts here include: IDs of all bearers, core network side tunnel IDs corresponding to each bearer, service SAE gateway node address corresponding to each bearer, QoS parameters corresponding to each bearer, etc. the

Step 3: After the access network node receives the context establishment request message or the access bearer establishment request message, the access network node establishes the relevant context of the MS locally, and establishes a corresponding communication between the cell and the MS according to the bearer state. wireless bearer. The process of establishing the radio bearer in step 3 can also be performed after step 4 or step 5. the

Step 4: The access network node allocates a corresponding access network side tunnel ID for each radio access bearer according to the context of the MS, and indicates that the tunnel ID corresponding to the cell and the corresponding core network user plane node address are Tunnel configuration resources. Then, the access network node transmits the tunnel ID on the access network side and the address information of the access network node to the core network control plane node through a response message. The response message here is, for example, a context establishment complete response message, or an access bearer establishment complete response message. the

Step 5: The core network control plane node sends an update session context request or an update bearer request message to the corresponding core network user plane node. The update session context request/update bearer request message carries the address of the access network node and all access network side tunnel IDs obtained by the core network control plane node from the access network node. The user plane node of the core network configures the downlink tunnels of all radio access bearers of the MS according to the tunnel ID on the access network side and the address of the access network node, and configures resources for the radio access bearers corresponding to the received downlink packets. QoS parameters, etc. Finally, the core network user plane node returns a response message to the core network control plane node. the

In the above flow description for FIG. 2, if the user packet data packet is terminated to the core network control plane node, step 1 in the above flow does not exist, and the above step 2 is directly performed. At this time, the bearer status indication information element is generated by the core network control plane node.

After the radio access resources of all the bearers of the MS are established through the method shown in Figure 2 above, other bearers of the MS that have bearer context information but are not connected to the radio bearers of the access network node in the network side activation state When sending a downlink packet data packet, the transmission process of the downlink packet data packet includes: after the downlink packet data packet is transmitted to the core network user plane node, the core network user plane node will search for the corresponding radio access bearer information according to the downlink packet data packet QoS parameters, etc., and configure resources for the radio access bearer on the core network side on the S1-U interface according to the found QoS parameters. Then, the core network user plane node sends the downlink packet data packet to the access network node through the resource-configured tunnel. After the access network node receives the downlink packet data packet, it searches for the corresponding bearer ID and QoS parameters according to the tunnel ID that transmits the downlink packet data packet, and the access network node assigns S1-U according to the found QoS parameters and other information. Resources are configured on the radio access bearer on the access network side on the interface, where the resources configured by the access network node for the radio access bearer can be used for transmission of uplink packet data packets. The access network node also needs to establish a radio bearer with the user terminal. The access network node transmits the downlink packet data packet to the user terminal through the established radio bearer. the

It can be seen from the above description of the embodiment in FIG. 2 that, in the embodiment of the present invention, when the user terminal transitions from the idle state to the active state, the context of each radio access bearer is established on the access network side, and each radio access bearer The bearer is assigned a tunnel ID, so when the subsequent network side needs to use other wireless access bearer services, the access network side no longer needs to exchange information with the core network side to establish a wireless access bearer, thus avoiding the core network The user plane node sends a bearer establishment request/bearer reestablishment request/downlink packet arrival notification message, the core network control plane node sends a context establishment request message, the core network control plane node sends a message such as update session The wireless bearer process avoids information interaction as much as possible, and shortens the delay in establishing the wireless access bearer as much as possible. the

The establishment process of the radio bearer and the radio access bearer in the embodiment of the present invention will be described below by taking the 3GPP evolved network architecture as an example. the

In the Service Request process initiated by the MS, the establishment process of radio bearers and radio access bearers is shown in Figure 3. the

In Fig. 3, in step 1, a wireless connection is established between the user terminal in an idle state and the access network. the

Step 2. The user terminal sends a service request message to a core network control plane entity such as MME, and the service request type in the service request message is signaling or data. When the service request type is data, the user terminal will report the bearer status indication information element to the core network control plane entity, for example, carry the bearer status indication information element in the service request message and transmit it to the MME. The bearer status indication information may be used to indicate which radio bearer needs to transmit the uplink packet. the

Step 3. For the user terminal in the idle state, after receiving the service request message, the core network control plane entity such as MME executes a security process to complete the security authentication of the user terminal. the

Step 4. The core network control plane entity such as MME initiates a security mode process, and sends the key negotiated with the user terminal for RRC connection encryption and integrity protection to the access network, such as through a security mode command. Access Network. The access network and the user terminal negotiate and start encryption and integrity protection algorithms and parameters, for example, the access network and the user terminal negotiate through the RRC security mode command and the RRC security mode completion message. After the negotiation is completed, the access network returns the negotiation result to the core network control plane entity, for example, returns the negotiation result to the MME through a security mode complete message. the

Step 5. After receiving the negotiation result, the core network control plane entity such as MME sends a context creation request to the access network, and sends the user context information required by the access network to the access network. The create context request message includes the UE's mobility management context information and bearer related information. For example, the creation context request message may include: the user permanent identity IMSI, the roaming restriction policy and network selection policy of the user terminal that needs to be used by the access network, the user's AMBR parameter, all session management contexts related to the user terminal, and the user terminal The bearer status indication cell obtained at The roaming restriction policy and network selection policy of the user terminal that needs to be used by the access network, such as the list of PLMNs that are allowed or restricted by the user terminal, etc. All session management contexts may include: all bearer IDs, core network side tunnel IDs corresponding to each bearer ID, core network user plane node addresses corresponding to each bearer ID, and bearer QoS corresponding to each bearer ID parameter. Here, the core network user plane node address is such as the service SAE gateway node address. the

Step 6: The access network receives and stores the information in the context creation request message delivered by the core network. The access network node eNB locally establishes the relevant context of the user terminal, and instructs the information element to establish a corresponding radio bearer with the user terminal according to the bearer state. The process of establishing the radio bearer in step 6 may also be performed after step 7 or step 8. the

Step 7. The access network node eNB allocates a corresponding tunnel ID on the access network side for each bearer according to the information of all bearers in the session management context related to the user terminal, and assigns a tunnel ID on the core network side for each wireless access bearer. The tunnel ID and the corresponding service SAE gateway node address configure the uplink tunnel; then, the access network carries the above-mentioned distributed access network side tunnel ID and access network node address information in the context establishment complete message and transmits it to the core network control Surface entity MME. the

Step 8. The core network control plane entity MME notifies the core network user plane entity of the establishment of the UPE bearer according to the received context establishment completion message, such as notifying the core network user plane entity of the establishment of the UPE bearer by updating the session context request message, here The core network user plane entity UPE such as the serving SAE gateway node. The content notified by the core network control plane entity MME includes: all tunnel IDs on the access network side, eNB address of the access network node, and bearer status indication information element obtained from the user terminal. The corresponding serving SAE gateway node configures the downlink tunnels of all wireless access bearers of the user terminal according to the received tunnel ID on the access network side and the eNB address of the access network node, and indicates that the information element is the corresponding Radio access bearer configuration resources, such as configuration of QoS parameters, etc. Finally, the serving SAE gateway node sends an update session context response message to the core network control plane node MME. the

Step 9: The user terminal sends an uplink packet to the core network through the established radio bearer and radio access bearer. Step 9 may follow step 8. If a radio bearer is established in step 6, step 9 may also follow step 6. the

If the user terminal needs to transmit uplink signaling, step 1 in the above description for FIG. 3 should be to establish a signaling connection, and then the user terminal can send uplink signaling after the security mode process ends. the

In the service request process initiated by the network side, user data in the idle state is terminated to the core network user plane entity such as the Serving SAE GW (Serving SAE Gateway) application scenario, and the establishment process of the radio bearer and radio access bearer is shown in Figure 4. the

In Fig. 4, in step 1, the core network user plane entity UPE such as the serving SAE gateway receives the downlink packet. the

Step 2. The core network user plane entity UPE finds that the radio access bearer corresponding to the downlink packet data packet is unavailable, that is, the UPE finds that the resources of the tunnel between the core network and the access network on the access network side have been released. The core network user plane entity UPE sends a bearer establishment request message to the core network control plane entity, such as MME, to request the core network control plane entity to reestablish a specified radio access bearer. The bearer establishment request message carries a bearer status indication information element, which is mainly used to indicate which radio access bearer needs to transmit downlink packet data packets. the

Step 3: The core network control plane entity MME detects that the user terminal is in an idle state, and then sends a paging request message to the access network, and the access network initiates a paging process for the user terminal according to the received paging request message. the

Step 4: The user terminal responds to the paging, and information exchange is performed between the user terminal and the access network to establish an air interface connection, that is, establish a wireless connection. the

Step 5. The user terminal sends a service request message to the core network control plane entity MME, and the service request type of the service request message is paging response. the

Step 6: After receiving the service request message, the core network control plane entity MME executes a security process to complete the security authentication of the user terminal. the

Step 7. The core network control plane entity MME initiates a security mode process, that is, the core network control plane entity MME sends the key negotiated with the user terminal for RRC connection encryption and integrity protection to the access network, and access The network and the user terminal negotiate and start encryption and integrity protection algorithms and parameters, and the access network returns the negotiation result to the core network control plane entity MME. the

Step 8: The core network control plane entity MME sends the user terminal context information required by the access network to the access network through a context establishment request message. The context establishment request message includes the mobility management context information and bearer related information of the user terminal. For example, the context establishment request message may include: the user permanent identity IMSI, the roaming restriction policy and the network selection policy of the user terminal that need to be used by the access network, AMBR parameters of the user terminal, all session management contexts and bearer state indication information elements related to the user terminal. The roaming restriction policy and network selection policy of the user terminal that needs to be used by the access network, such as the list of PLMNs that are allowed or restricted by the user terminal. All session management contexts related to the user terminal may include: all radio access bearer IDs, core network side tunnel IDs corresponding to each radio access bearer ID, service SAE gateway node addresses corresponding to each radio access bearer ID, and QoS parameters corresponding to each radio access bearer identifier. the

Step 9: The access network receives and saves the information in the context establishment request message delivered by the core network. The access network node such as eNB establishes the relevant context of the user terminal locally, and instructs the cell to initiate the bearer establishment process of the air interface according to the bearer state, so as to establish the wireless bearer between it and the user terminal. The process of establishing the radio bearer in step 9 may also be performed after step 10, step 11, or step 12. the

Step 10, the access network node allocates a corresponding tunnel ID on the access network side to each radio access bearer according to the received information of all radio access bearers in the session management context related to the user terminal, and according to each radio access bearer The core network side tunnel ID of the access bearer and the corresponding service SAE gateway node address configure an uplink tunnel. Then, transmit the tunnel ID on the access network side and the address information of the access network node to the core network control plane entity MME through a context establishment complete message. the

Step 11, the core network control plane entity MME notifies the core network user plane entity UPE of the establishment of the serving SAE gateway bearer according to the received context establishment completion message, such as notifying the serving SAE gateway node by updating the session context indication message. The content notified by the core network control plane entity MME includes: all tunnel IDs on the access network side, eNB address of the access network node, and bearer status indication information element obtained from the user terminal. The corresponding serving SAE gateway node configures the downlink tunnels of all wireless access bearers of the user terminal according to the received tunnel ID on the access network side and the eNB address of the access network node, and configures the tunnel corresponding to the received downlink packet data packet Resources such as configuring QoS parameters, etc. After resources are configured for the tunnel, the serving SAE gateway node may send a response message to the core network control plane node MME, or may not send a response message to the core network control plane node MME. the

Step 12: The user plane entity UPE of the core network delivers the downlink packet through the newly established radio access bearer. the

In the process of initiating a service request on the network side, the idle state user data is terminated to the core network control plane node MME scenario, and the establishment process of radio bearers and radio access bearers is shown in Figure 5. the

Step 1. The core network control plane entity MME receives the downlink packet. the

Step 2. The core network control plane entity MME finds that the user terminal is in an idle state, and the radio access bearer corresponding to the downlink packet data packet is unavailable, that is, the resources on the access network side of the tunnel between the core network and the access network have been released . The core network control plane entity MME sends a paging request message to the access network, and the access network initiates a paging process for the user terminal. the

Step 3: The user terminal responds to the paging, and information exchange is performed between the user terminal and the access network to establish an air interface connection, that is, establish a wireless connection. the

Step 4. The user terminal sends a service request message to the core network control plane entity MME, and the service request type of the service request message is paging response. the

Step 5: After receiving the service request message, the core network control plane entity MME executes a security process to complete the security authentication of the user terminal. the

Step 6. The core network control plane entity MME initiates a security mode process, that is, the core network control plane entity MME sends the key negotiated with the user terminal for RRC connection encryption and integrity protection to the access network, and access The network and the user terminal negotiate and start encryption and integrity protection algorithms and parameters, and the access network returns the negotiation result to the core network control plane entity MME. the

Step 7: The core network control plane entity MME sends the user terminal context information required by the access network to the access network through a context establishment request message. The context establishment request message includes the mobility management context information and bearer related information of the user terminal. For example, the context establishment request message may include: the user permanent identity IMSI, the roaming restriction policy and the network selection policy of the user terminal that need to be used by the access network, AMBR parameters of the user terminal, all session management contexts and bearer status indication information elements related to the user terminal. The roaming restriction policy and network selection policy of the user terminal that needs to be used by the access network, such as the list of PLMNs that are allowed or restricted by the user terminal. All session management contexts related to the user terminal may include: all radio access bearer IDs, core network side tunnel IDs corresponding to each radio access bearer ID, service SAE gateway node addresses corresponding to each radio access bearer ID, and QoS parameters corresponding to each radio access bearer identifier. the

Step 8: The access network receives and saves the information in the context establishment request message issued by the core network. The access network node such as eNB establishes the relevant context of the user terminal locally, and instructs the cell to initiate the bearer establishment process of the air interface according to the bearer state, so as to establish the wireless bearer between it and the user terminal. The process of establishing the radio bearer in step 8 may also be performed after step 9, step 10, step 11, or step 12. the

Step 9: The access network node allocates a corresponding tunnel ID on the access network side to each radio access bearer according to the received information of all radio access bearers in the session management context related to the user terminal, and according to each radio access bearer The core network side tunnel ID of the access bearer and the corresponding service SAE gateway node address configure an uplink tunnel. Then, transmit the tunnel ID on the access network side and the address information of the access network node to the core network control plane entity MME through a context establishment complete message. the

Step 10: After receiving the context establishment complete message, the core network control plane entity MME configures a temporary downlink tunnel, and delivers the buffered downlink packet data packets through the temporary downlink tunnel. the

Step 11: The core network control plane entity MME notifies the core network user plane entity UPE that the serving SAE gateway bearer is established, such as by updating the session context indication message to notify the core network user plane entity UPE serving SAE gateway node. The content notified by the core network control plane entity MME includes: all tunnel IDs on the access network side, eNB address of the access network node, and bearer status indication information element obtained from the user terminal. The corresponding serving SAE gateway node configures the downlink tunnels of all wireless access bearers of the user terminal according to the received tunnel ID on the access network side and the eNB address of the access network node, and configures the downlink tunnels of all wireless access bearers for the received downlink packet data packets Import bearer configuration resources. Finally, the serving SAE gateway node sends a response message to the core network control plane node MME. the

Step 12, the core network user plane entity UPE sends the downlink packet through the newly established wireless access bearer. the

After the radio access bearer and the radio bearer are established by using the method shown in Figure 3, Figure 4, or Figure 5 above, the user terminal in the activated state sends information to other bearer context information but not to the access network node eNB When the uplink packet data packet is sent on the bearer of the radio bearer, the transmission process of the packet data packet is shown in FIG. 6 . the

In FIG. 6 , in step 1, the user terminal sends a radio bearer establishment request to the access network node, and the radio bearer establishment request carries a corresponding bearer ID or bearer status indication information element. The bearer status indication information element may be used to indicate which radio bearer needs to transmit the uplink packet. the

Step 2. After receiving the radio bearer establishment request, the access network node searches locally for context information corresponding to the corresponding radio access bearer. The access network node configures radio access bearer resources on the S1-U interface according to the service quality parameters in the found context information, and establishes corresponding radio bearers. the

Step 3: The user terminal sends an uplink packet according to the established radio bearer. When the above-mentioned packet data packet arrives at the user plane node of the core network such as the serving SAE gateway node, the serving SAE gateway node searches for the corresponding radio access bearer ID and QoS parameters according to the tunnel ID for transmitting the uplink packet data packet, and according to The information such as the found QoS parameters is used to configure resources for the radio access bearer on the S1-U interface. the

After the radio access bearer and the radio bearer are established by using the method shown in Figure 3 or Figure 4 or Figure 5 above, the user terminal in the network lateral activation state has bearer context information, but does not have access to the access network. When the downlink packet data packet is sent on the bearer of the radio bearer of the node eNB, the transmission process of the packet data packet is shown in FIG. 7 . the

In Figure 7, step 1, the downlink packet data packet is transmitted to the core network user plane node such as the serving SAE gateway node, the serving SAE gateway node searches for information such as service quality parameters according to the wireless access bearer information of the downlink packet data packet, and according to the found Configure resources for the tunnel on the core network side of the S1-U interface based on information such as quality of service parameters. Then, the serving SAE gateway node sends the received downlink packet data packet to the access network node eNB through the above-mentioned resource-configured tunnel.

Step 2: After the access network node eNB receives the downlink packet, since there is no radio bearer corresponding to the downlink packet, the access network node eNB caches the packet. The access network node eNB looks up the corresponding radio access bearer ID and QoS parameters according to the tunnel ID for transmitting the downlink packet. The access network node eNB configures resources for the radio access bearer on the S1-U interface according to the found QoS parameters, and establishes a corresponding radio bearer with the terminal. the

Step 3. The access network node eNB sends the buffered downlink packet data packet to the user terminal through the radio bearer. the

In the above description of the implementation of the packet data packet transmission method, an application scenario where the user terminal transitions from the idle state to the active state is taken as an example for illustration. In other application scenarios, the packet transmission process is basically the same as the above description, and will not be described in detail here. the

It can be seen from the description of the implementation of the packet data packet transmission method above: because the implementation of the present invention obtains all session management contexts of the user terminal during the process of providing services for the user terminal, and provides all session management contexts for all session management contexts. Tunnels are assigned to radio access bearers. Therefore, when other radio access bearers of active user terminals need to be used to implement services, the previously allocated tunnels can be used to avoid the need for establishing radio access between the user terminal and the network. Signaling interaction for incoming bearers, which not only saves valuable network-side resources, but also avoids the delay in establishing wireless access bearers caused by signaling interaction. Since the embodiment of the present invention reduces the time delay for establishing the radio access bearer as much as possible, the service experience of the user is improved. the

The packet data packet transmission system according to the embodiment of the present invention will be described below. the

The packet data packet transmission system in the embodiment of the present invention includes: a first module, a second module, a third module, a fourth module, a fifth module, a sixth module, a seventh module and an eighth module. Wherein, the first module, the second module, the fourth module and the seventh module are arranged on the access network side, and the third module, the fifth module, the sixth module and the eighth module are arranged on the core network side. the

The first module is mainly used to acquire at least two—such as all session management contexts—of the user terminal. The first module can acquire at least two of the user terminal—such as all session management contexts—in the process of transitioning the user terminal from the idle state to the active state. The first module may obtain all session management contexts of the user terminal from the fifth module, such as the first module receiving the context establishment request message transmitted by the fifth module, and obtaining multiple sessions of the user terminal from the context establishment request message Manage context. The first module can be set in the access network node. the

The second module is mainly used to configure access network side tunnels for each radio access bearer in the session management context acquired by the first module. For example, the second module can locally establish the context according to the session management context obtained by the first module, and configure the access network side tunnel identifier for each radio access bearer in the session management context, and the second module can also set it as a The access network side tunnel identifier and the access network node address information of the access bearer configuration are returned to the core network side. The second module can be set in the access network node. the

The third module is mainly used to configure core network side tunnels for each wireless access bearer in the session management context of the user terminal. The access bearer is configured with the core network side tunnel identifier. The third module can be set in the user plane entity of the core network. the

The fourth module is mainly used to establish a radio bearer for the packet data packet to be transmitted, and determine the access network side tunnel that needs to transmit the packet data packet, and then allocate resources for the access network side tunnel that needs to transmit the packet data packet. The fourth module can determine the access network side tunnel to be used according to the information transmitted from the user terminal, and the fourth module can also determine the access network side tunnel to be used according to the information transmitted from the core network side. The information here can be a bearer status indication information element, a radio bearer ID, or a radio access bearer ID, etc., such as the bearer status indication information element in the context establishment request message transmitted by the fourth module according to the fifth module to determine which tunnel to use. The fourth module can be set at the access network node. the

The fifth module is mainly used to store the session management context of the user terminal, and provide the first module and the third module with at least two of the user terminal—such as all session management contexts, such as the fifth module receiving the bearer of the core network side After establishing the request message or receiving the downlink packet data packet or receiving the service request sent by the user terminal, at least two of the user terminal—such as all session management contexts— are transmitted to the first module through the context establishment request message. When the fifth module sends the session management context of the user terminal to the first module, it may also carry the bearer state indication information element in the context establishment request message. The fifth module can be set in the core network control plane entity. the

The sixth module is mainly used to determine the radio access bearer corresponding to the packet data packet to be transmitted, and allocate resources for the core network side tunnel corresponding to the radio access bearer. The sixth module may determine the radio access bearer to be used according to the information transmitted by the user terminal. The sixth module may also determine the radio access bearer to be used according to the downlink packet to be transmitted. The information here may be a bearer state indication information element. The sixth module can be set in the core network user plane entity. the

The seventh module and the eighth module are mainly used for transmitting packet data packets between the user terminal and the core network according to the radio bearer and tunnel established above. For example, the seventh module receives the uplink packet data transmitted by the user terminal through the radio bearer, and transmits the uplink packet data to the eighth module through the tunnel between the access network and the core network; The downlink packet is transmitted to the seventh module through the tunnel between the access network and the core network, and the seventh module transmits the received downlink packet to the user terminal through the radio bearer. The seventh module can be set in the access network node, and the eighth module can be set in the core network user plane entity. the

An embodiment of the present invention provides a network device, the network device is an access network node device, and the network device is provided with a first module, a second module, a fourth module and a seventh module. The operations performed by the first module, the second module, the fourth module and the seventh module are as described in the above system implementation and method implementation, and will not be described in detail here. Since the access network node device obtains multiple session management contexts of the user terminal during the transition of the user terminal from the idle state to the active state, and assigns a tunnel ID to each radio access bearer in the context, so in When it is necessary to use other wireless access bearers of the user terminal to implement services in the future, the access network node device no longer needs to perform information interaction with the core network side to establish wireless access bearers, thereby avoiding information interaction as much as possible, and as much as possible This shortens the delay in establishing radio access bearers. the

The embodiment of the present invention also provides a network device, the network device is a core network control plane node device, such as MME and the like. The network device is provided with a fifth module. The operations performed by the fifth module are as described in the foregoing system embodiment and method embodiment, and will not be described in detail here. Since the control plane node of the core network transmits multiple session management contexts of the user terminal to the access network side during the transition of the user terminal from the idle state to the active state, other radio access bearers of the user terminal need to be used subsequently When implementing services, the process of obtaining the corresponding session management context from the core network side on the access network side is avoided, thereby avoiding information interaction as much as possible and shortening the delay in establishing a radio access bearer as much as possible. the

The embodiment of the present invention also provides a network device, which is a core network user plane node device, such as a serving SAE gateway. The network device is provided with a third module, a sixth module and an eighth module. The operations performed by the third module, the sixth module, and the eighth module are as described in the above-mentioned system embodiment and method embodiment, and will not be described in detail here. During the transition of the user terminal from the idle state to the active state, etc., the user plane node of the core network allocates tunnel IDs for each radio access bearer in multiple session management contexts of the user terminal, so the user terminal needs to be used in the subsequent When other wireless access bearers are used to implement services, the core network user plane node no longer needs to perform the information exchange process of establishing wireless access bearers with the core network side, thus avoiding information interaction as much as possible and shortening the time for establishing wireless access bearers as much as possible. Incoming bearer delay. the

Although the present invention has been described by way of example, those of ordinary skill in the art know that there are many variations and changes in the present invention without departing from the spirit of the invention, and the claims of the application document of the present invention include these variations and changes.

Claims (9)

1. a packet data package transmission method is characterized in that, described method comprises:

Obtain at least two session management contexts of user terminal;

Be each the RAB configured tunneling technique in the described session management context;

For the packet data package of needs transmission is set up radio bearer, and, transmit according to the packet data package that the tunnel after described radio bearer, the Resources allocation carries out between user terminal and the core net for needing the tunnel distributing resource of the described packet data package of transmission;

Wherein, describedly set up radio bearer for the packet data package that needs transmission and comprise:

Access network node is according to the radio bearer between loaded state indication information foundation that receives and the user terminal; Described loaded state indication information is used to indicate the carrying of the packet data package of needs transmission.

2. the method for claim 1 is characterized in that, the described contextual step of at least two session managements of obtaining user terminal comprises:

Forward to from idle condition the state of activation process at user terminal, access network node obtains at least two session management contexts of user terminal.

3. the method for claim 1 is characterized in that: described core net receives the loaded state indication information that the user terminal transmission comes, and described loaded state indication information is transferred to access network node; Perhaps described core net transfers to access network node with the loaded state indication information of its generation.

4. method as claimed in claim 2, it is characterized in that, described is to need the packet data package of transmission to set up radio bearer, and for needing the tunnel distributing resource of the described packet data package of transmission, the step of carrying out the packet data package transmission between user terminal and the core net according to the tunnel after described radio bearer, the Resources allocation comprises:

When being in described user terminal under the state of activation and need sending the ascending packet data bag, the local session management context of setting up is searched in the request that access network node sends according to described user terminal;

Access network node is that needs transmit the Access Network side uplink tunnel resource allocation of described ascending packet data bag and set up radio bearer according to the session management context that finds, and by described radio bearer, uplink tunnel the ascending packet data bag of user terminal is transferred to core net.

5. method as claimed in claim 4 is characterized in that, carrying ID and/or loaded state indication information element in the request that transmission comes according to user terminal of described access network node are searched the local session management context of setting up.

6. method as claimed in claim 2, it is characterized in that, described is to need the packet data package of transmission to set up radio bearer, and for needing the tunnel distributing resource of the described packet data package of transmission, the step of carrying out the packet data package transmission between user terminal and the core net according to the tunnel after described radio bearer, the Resources allocation comprises:

Core net need be when the user terminal under being in state of activation sends the downlink grouped data bag, core net node is the core-network side downlink tunnel resource allocation that needs the described packet data package of transmission, and described downlink grouped data bag is transferred to access network node by described downlink tunnel;

Access network node receives described downlink grouped data bag, and searches the local session management context of setting up according to the RAB of described downlink grouped data bag correspondence;

Access network node is that described downlink grouped data bag is set up radio bearer according to the session management context that finds, and is the Access Network side uplink tunnel resource allocation of described radio bearer correspondence;

Access network node sends described downlink grouped data bag by described radio bearer to user terminal.

7. grouped data packet transmission system, it is characterized in that, described system comprises: Access Network side and core-network side, described Access Network side is provided with first module, second module, four module and the 7th module, and described core-network side is provided with three module, the 5th module, the 6th module and the 8th module;

First module: at least two session management contexts that are used to obtain user terminal;

Second module: be used to each RAB configuration Access Network side tunnel in the session management context that described first module obtains;

Three module: each the RAB configuration core-network side tunnel that is used to described user terminal;

Four module: for the packet data package of needs transmission is set up radio bearer, and for needing the Access Network side tunnel distributing resource of the described packet data package of transmission;

The 5th module: be used to store the session management context of user terminal, and at least two session management contexts of user terminal are provided for first module;

The 6th module: be used to need to determine the core-network side tunnel of transmitting grouped data bag, and for needing the core-network side tunnel distributing resource of transmitting grouped data bag;

The 7th module and the 8th module: the packet data package that is used for carrying out between user terminal and the core net in radio bearer, tunnel according to described foundation is transmitted.

8. a network equipment is characterized in that, the described network equipment is positioned at the Access Network side, and the described network equipment is provided with first module, second module, four module and the 7th module;

First module: at least two session management contexts that are used to obtain user terminal;

Second module: be used to each RAB configuration Access Network side tunnel in the session management context that described first module obtains;

Four module: for the packet data package of needs transmission is set up radio bearer, and for needing the Access Network side tunnel distributing resource of the described packet data package of transmission;

The 7th module: be used for the radio bearer according to described foundation, described Access Network side tunnel and carry out the packet data package transmission.

9. a network equipment is characterized in that, is provided with three module, the 5th module, the 6th module and the 8th module in the described network equipment;

Three module: each the RAB configuration core-network side tunnel that is used to described user terminal;

The 5th module: be used to store the session management context of user terminal, and at least two session management contexts of user terminal are sent to the Access Network side;

The 6th module: be used to need to determine the core-network side tunnel of transmitting grouped data bag, and for needing the core-network side tunnel distributing resource of transmitting grouped data bag;

The 8th module: be used for carrying out the packet data package transmission according to described core-network side tunnel.

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