WO2011079563A1

WO2011079563A1 - Method for establishing and releasing data connection, data transmission method and wireless data card

Info

Publication number: WO2011079563A1
Application number: PCT/CN2010/072638
Authority: WO
Inventors: 丁晓磊; 温海龙
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-12-30
Filing date: 2010-05-11
Publication date: 2011-07-07
Also published as: CN101778484A

Abstract

A method for establishing and releasing a data connection, a data transmission method and a wireless data card are provided by the present invention, wherein the method for establishing a data connection includes that: when the wireless data card receives a request for establishing a data connection with a Gateway General packet radio service Support Node (GGSN) initiated by the Terminal Equipment (TE), the wireless data card judges whether the requested data connection required to be established is the first data connection between the TE and the wireless data card (S102); if yes, the wireless data card establishes a radio access bearer of the Packet Data Protocol(PDP) context corresponding to the first data connection with the GGSN and establishes a virtual Ethernet connection with the TE(S103); if no, the wireless data card establishes the radio access bearer of the PDP context corresponding to the Nth data connection with the GGSN(S104). The present invention realizes that the data connection established by the TE with the wireless data card supports activating a plurality of PDP contexts simultaneously. Besides, because the advantage of the RmNet data transmission mode is reserved, the data transmission rate of the Rm port is guaranteed.

Description

Data connection establishment, release method, data transmission method, and wireless data card

The present invention relates to the field of mobile communications, and in particular, to a data connection establishment method, a release method, a data transmission method, and a wireless data card. Background technique

With the advent of the third generation of mobile communication (The 3rd Generation, 3G) era, wireless data cards have a large advantage over traditional fixed-line access methods due to their high speed and portability, thus triggering users to access the Internet. Great demand.

The wireless data card adopts the TE+MT application mode, in which the terminal equipment (TE) is generally a PC, and the mobile terminal (MT) is generally a wireless data card or a mobile phone.

The 3rd generation mobile communication partner, The 3rd Generation Partnership Project (3GPP), defines two bearer modes for the application data of the wireless data card, namely IP bearer mode and point-to-point protocol (Point-to-Point Protocol). , ΡΡΡ ) Loading method. Since the IP bearer mode is more efficient than the PPP bearer mode, in current practical applications, the wireless data card usually uses the IP bearer mode for data transmission.

When the wireless data card uses the IP bearer mode, the corresponding dialing mode is divided into a dial-up mode according to the data link layer protocol used between the wireless data card and the TE (ie, the Rm port). It is called Ras mode, namely Remote Access Service, or DUN mode, namely Dial Up Network) and RmNet mode (ie Rm Network, also known as NDIS mode, ie Network Driver Interface Specification).

Dial-up dialing mode uses the PPP protocol to encapsulate IP data packets at the data link layer of the Rm port. However, due to its character-oriented processing, the PPP protocol is not very efficient in processing efficiency. When dealing with higher data traffic, the processing load of the data card and the TE is significantly increased, thereby affecting the actual rate. On the other hand, with the continuous evolution of 3G technology, the data rate that wireless data cards can carry on the air interface Um is increasing. In this case, the disadvantages of using the PPP protocol between the wireless data card and the TE will gradually emerge. Come out, and become a bottleneck that restricts the user's actual rate increase.

With the continuous evolution of 3G technology, the data rate that can be carried by the wireless data card on the air interface Um is continuously improved. The wireless data card has gradually begun to use the RmNet dialing mode. The wireless data card in the RmNet dialing mode virtualizes an ethernet through the USB interface. The Ethernet Network Adapter enables the transfer of IP packets between the TE and the wireless data card over a virtual Ethernet connection. Because the Ethernet protocol can support higher data rates, it will meet the ever-increasing needs of future 3G rates.

Mobile terminals such as wireless data cards and mobile phones and the network side usually support a Radio Access Bear (RAB) that establishes multiple Packet Data Protocol (PDP) contexts at the same time, but the number of connections between the wireless data card and the TE is affected. The limitation of the data transmission technology problem, the current wireless data card can only support one Packet Data Protocol (PDP) context in practical applications, because in the case of supporting multiple PDP contexts, the wireless data card can simultaneously Multiple different types of applications are provided to provide Quality of Service (QoS) guarantees, and different services using different Access Point Names (ΑΡΝ) can be simultaneously performed, and multiple PDP context activations are supported at the same time. Related research on the implementation method has been carried out, but at present, there is no data connection between the TE and the network side gateway general packet radio service support node (GGSN) by simultaneously activating multiple PDP contexts through the wireless data card in the RmNet dialing mode. Program. Summary of the invention

The embodiment of the present invention provides a data connection establishment method, a release method, a data transmission method, and a wireless data card, which are used to establish data for simultaneously activating multiple PDP contexts between a TE and a network side GGSN in an RmNet dialup mode. Connection and data transmission. In order to achieve the above object, the technical solution of the present invention is implemented as follows:

A data connection establishment method, the method comprising:

Receiving, by the TE, a request initiated by the TE to establish a data connection with the GGSN, determining whether the data connection to be established by the request is the first data connection between the TE and the wireless data card;

If yes, the wireless data card establishes a PDP context radio access bearer corresponding to the first data connection with the GGSN, and establishes a virtual Ethernet connection with the TE; otherwise, the wireless data card is based on the TE and The data connection between the wireless data cards correspondingly establishes a PDP context wireless access bearer between itself and the GGSN.

Before the wireless data card receives the TE initiated request to establish a data connection with the GGSN, the method further includes:

The TE sends an instruction to the wireless data card, and the wireless data card sets PDP context parameter information corresponding to the data connection according to the instruction issued by the TE;

The wireless data card establishes a PDP context wireless access bearer corresponding to the data connection with the GGSN, including:

The wireless data card creates and activates a PDP context corresponding to the data connection according to the preset PDP context parameter information.

The TE sends a command to the wireless data card to create a corresponding business process template for the PDP context corresponding to the data connection.

A data connection release method, the method comprising:

The wireless data card determines whether the data connection that needs to be disconnected is the last data connection between the TE and the GGSN;

If yes, then deactivate the PDP context corresponding to the data connection that needs to be disconnected, and release the A virtual Ethernet connection between the TEs; otherwise, maintaining a virtual Ethernet connection with the TE to deactivate the PDP context corresponding to the data connection that needs to be disconnected.

A method for performing uplink data transmission, the method comprising:

The wireless data card receives the uplink IP data packet sent by the TE through the virtual Ethernet connection; the wireless data card compares the PDP address in the PDP context corresponding to the uplink IP data packet with the source IP address of the uplink IP data packet;

If the two are consistent, the uplink IP data packet is sent to the GGSN through the radio access bearer of its corresponding PDP context; otherwise, the source IP address in the uplink IP data packet is updated by using the PDP address in the PDP context. The address, the updated uplink IP data packet is sent to the GGSN through a corresponding PDP context radio access bearer.

The PDP context corresponding to the uplink IP packet is determined by:

The wireless data card matches the uplink IP data packet according to the pre-created service flow template.

PDP context.

After updating the source IP address in the uplink IP data packet, the method further includes: recalculating and modifying the checksum of the uplink IP data packet.

A method for performing downlink data transmission, the method comprising:

The wireless data card receives the downlink IP data packet sent by the GGSN through the PDP context radio access bearer;

The wireless data card compares the destination IP address of the downlink IP data packet with the IP address of the virtual Ethernet connection between the wireless data card and the TE;

If the two are consistent, forwarding the downlink IP data packet to the TE through a virtual Ethernet connection; otherwise, updating the destination IP address of the downlink IP data packet with the IP address of the Ethernet connection, and updating The downstream IP packets are forwarded to the TE over a virtual Ethernet connection.

After updating the destination IP address in the downlink IP data packet, the method further includes: recalculating and modifying the checksum of the downlink IP data packet. A wireless data card, the method comprising:

a receiving module, configured to receive a TE initiated request for establishing a data connection with the GGSN, and a determining module, configured to determine whether the data connection that the request needs to establish is the first data between the TE and the wireless data card Connection

a connection establishing module, configured to: when the judgment result of the determining module is yes, establish a PDP context radio access bearer corresponding to the first data connection with the GGSN, and establish a virtual Ethernet connection with the TE When the judgment result of the judging module is no, the PDP context radio access bearer between the TE and the GGSN is established according to the data connection between the TE and the wireless data card.

Also includes a comparison module and a data forwarding module;

The receiving module is further configured to receive an uplink IP data packet sent by the TE through a virtual Ethernet connection;

The comparing module is configured to compare a PDP address in a PDP context corresponding to the uplink IP data packet with a source IP address of the uplink IP data packet;

a data forwarding module, configured to send the uplink IP data packet to the GGSN through its corresponding PDP context radio access bearer when the comparison result of the comparison module is consistent; and when the comparison result of the comparison module is inconsistent And updating the source IP address in the uplink IP data packet by using a PDP address in the PDP context, and sending the updated uplink IP data packet to the GGSN by using the PDP context radio access bearer.

The receiving module is further configured to receive a downlink IP data packet that is sent by the GGSN through a PDP context radio access bearer;

The comparing module is further configured to compare a destination IP address of the downlink IP data packet with an IP address of a virtual Ethernet connection between the wireless data card and the TE;

The data forwarding module is further configured to forward the downlink IP data packet to the TE through a virtual Ethernet connection when the comparison result of the comparison module is consistent; when the comparison result of the comparison module is inconsistent Updating the downlink IP packet with the IP address of the Ethernet connection The destination IP address, and the updated downstream IP packet is forwarded to the TE through the virtual Ethernet connection.

Advantageous effects of embodiments of the present invention include:

The data connection establishing method, the releasing method, the data transmitting method and the wireless data card provided by the embodiment of the present invention, wherein the data establishing method determines that the request is needed when the wireless data card receives a request initiated by the TE to establish a data connection with the GGSN Whether the established data connection is the first data connection between the TE and the wireless data card; if yes, establishing a wireless access 7 with the PDP context corresponding to the first data connection between the GGSN, and establishing A virtual Ethernet connection with the TE; if not, the wireless data card establishes a radio access bearer with the PDP context corresponding to the Nth (N is a natural number greater than 1) data connection between the GGSN.

The data connection establishing method provided by the embodiment of the present invention implements the wireless data card to support multiple PDP contexts in the RmNet dialing mode, thereby establishing multiple data connections between the terminal device TE and the network side GGSN, so that the user uses different Different services of APN can be carried out at the same time, and provide QoS guarantee for users of different types of applications to meet the needs of users for diverse data transmission.

In addition, the data transmission method provided by the embodiment of the present invention can guarantee the data transmission rate of the Rm interface and avoid the support of the Pm protocol of the Rm interface, because the advantages of the RmNet data transmission mode are retained under the premise of supporting the multi-PDP context. The problem of the Rm port transmission rate bottleneck caused by the PDP context. DRAWINGS

FIG. 1 is a flowchart of a method for establishing a data connection according to an embodiment of the present invention;

2 is a flowchart of a data connection release method according to an embodiment of the present invention;

3 is a flowchart of an uplink data transmission method according to an embodiment of the present invention;

4 is a flowchart of a downlink data transmission method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an internal structure of a wireless data card according to an embodiment of the present invention. detailed description

The data connection establishing method, the releasing method, the data transmitting method and the specific implementation manner of the wireless data card provided by the present invention are described in detail below with reference to the accompanying drawings.

A data connection establishing method is provided in the embodiment of the present invention, and a plurality of data connections are established between the TE and the network side GGSN in the dialing mode of the RmNet. And because the air interface Rm between the wireless data card and the TE does not use the PPP protocol, it can support a higher transmission rate.

A data connection establishing method provided by an embodiment of the present invention, as shown in FIG. 1, includes the following steps:

S101. The TE initiates a data connection request with the network side GGSN to the wireless data card.

5102, the wireless data card determines whether the data connection that the request needs to establish is the first data connection between the TE and the wireless data card; if yes, step S103 is performed; if not, step S104 is performed;

5103. The wireless data card establishes a radio access bearer with a PDP context corresponding to the first data connection between the GGSN, and establishes a virtual Ethernet connection with the TE.

5104. The wireless data card establishes a radio access bearer with a PDP context corresponding to the Nth data connection between the GGSNs; N is a natural number greater than 1.

The above steps are described in detail below.

Before the TE initiates the data connection request with the network side GGSN to the wireless data card, the TE sends the PDP corresponding to the data connection in the wireless data card by sending an AT command such as CGDCONT or CQEQREQ to the wireless data card. Context parameter information, and establish a corresponding service flow template for the data connection requested to be established (TFT, Traffic Flow Template is used in subsequent data transmission).

The parameter information of the PDP context includes but is not limited to information such as APN, PDP Type, and QoS. Specifically, in the foregoing step S103, the wireless data card establishes a radio access bearer of the PDP context corresponding to the first data connection between the network side GGSN, and the RmNet mode data of the wireless data card in the prior art. The connection establishment process is similar, including:

The wireless data card creates and activates a corresponding PDP context according to the parameter information of the PDP context preset by the TE in the wireless data card (in order to correspond to the first data connection, hereinafter referred to as the first PDP context), and establishes wireless data. The first PDP context between the card and the GGSN is wirelessly accessed 7 times.

In the above step S103, a process of establishing a virtual Ethernet connection between the wireless data card and the TE:

The wireless data card activates its Dynamic Host Configuration Protocol (DHCP) server module and establishes a virtual Ethernet connection to the TE.

At the same time, TE also obtains the PDP address in the activated PDP context from the wireless data card through the above DHCP process, as the IP address of the virtual Ethernet connection.

At this point, the TE establishes the first connection with the GGSN via the wireless data card.

The foregoing step S104 is a process in which the TE establishes the Nth data connection between the GGSNs by using the wireless data card (N is greater than 1), and is similar to the manner of the first data connection, where the TE initiates establishment between the network side and the GGSN. Before the data connection request, the parameter information of the PDP context corresponding to the Nth data connection is set in the wireless data card by the AT command, and the corresponding service flow template is created, and when the wireless data card receives the request of the Nth data connection, Establishing and activating a corresponding PDP context according to the preset PDP context parameter information, establishing a radio access bearer of the Nth PDP context between the wireless wireless data card and the GGSN.

In the case that a plurality of data connections have been established between the TE and the GGSN, when a data connection between the TE and the GGSN needs to be disconnected by the wireless data card, the embodiment of the present invention further provides a data connection release method. As shown in Figure 2, the following process is included:

S201. The wireless data card determines whether the data connection that needs to be disconnected is TE and GGSN. The last data connection between; if yes, execute S202; if not, execute S203;

5202. Deactivate a PDP context corresponding to the data connection that needs to be disconnected, and release a virtual Ethernet connection with the TE.

5203. Maintain a virtual Ethernet connection with the TE to deactivate the corresponding PDP context of the data connection that needs to be disconnected.

In the above steps S202 and S203, the PDP context corresponding to the data connection to be disconnected is deactivated, and the purpose is to release the wireless access 7 of the PDP context corresponding to the data connection between the wireless data card and the GGSN.

The embodiment of the present invention further provides an uplink data transmission method, where the transmission method performs uplink data transmission on a data connection established by the foregoing data connection establishment method provided by the embodiment of the present invention, specifically, the uplink data transmission The process, as shown in Figure 3, includes the following steps:

5301. The wireless data card receives an uplink IP data packet sent by the TE through a virtual Ethernet connection.

5302. The wireless data card compares the PDP address in the PDP context corresponding to the uplink IP data packet with the source IP address of the uplink IP data packet. If the two are consistent, step S303 is performed. If the two are inconsistent, the step is performed. S304;

5303. The uplink IP data packet is sent to the GGSN by using a radio access bearer of its corresponding PDP context.

5304. Update the source IP address in the uplink IP data packet by using the PDP address in the PDP context corresponding to the IP data packet, and pass the updated uplink IP data packet to the radio access bearer of the PDP context corresponding to the IP data packet. Send to GGSN.

In the above step S302, the wireless data card matches the PDP context corresponding to the uplink IP data packet according to the service flow template created by the TE in advance in the wireless data card.

In the above step S304, the wireless data card uses the PDP address in the PDP context corresponding to the IP data packet to update the source IP address in the uplink IP data packet, and recalculates and modifies the checksum of the uplink IP data packet. The updated uplink IP packet is then forwarded to the GGSN. The embodiment of the present invention further provides a downlink data transmission method, where the transmission method performs downlink data transmission on a data connection established by the foregoing data connection establishment method provided by the embodiment of the present invention, specifically, the downlink data transmission The process, as shown in Figure 4, includes the following steps:

S401. The wireless data card receives the downlink IP data packet sent by the GGSN through the radio access bearer of the PDP context.

5402, the wireless data card compares the destination IP address of the downlink IP data packet with the IP address of the virtual Ethernet connection between the wireless data card and the TE; if the two are consistent, step S403 is performed, if the two are inconsistent, Go to step S404;

5403. Forward the downlink IP data packet to the TE through the virtual Ethernet connection.

5404. Update the destination IP address of the downlink IP packet by using the IP address of the Ethernet connection, and forward the updated downlink IP packet to the TE through the virtual Ethernet connection.

In the above step S404, the wireless data card further includes the steps of recalculating and modifying the checksum of the downlink IP data packet, and then forwarding the downlink IP data packet to the TE.

Based on the same inventive concept, a wireless data card is further provided in the embodiment of the present invention. The principle of solving the problem is similar to the foregoing data connection establishing method and data transmission method. Therefore, the implementation of the device can refer to the implementation of the method. , the repetition is not repeated.

A wireless data card provided by the embodiment of the present invention, as shown in FIG. 5, includes:

The receiving module 501 is configured to receive a request initiated by the TE to establish a data connection with the GGSN.

The determining module 502 is configured to determine whether the data connection that the request needs to establish is the first data connection between the TE and the wireless data card;

The connection establishing module 503 is configured to: when the determination result of the determining module 502 is YES, establish a radio access bearer with a PDP context corresponding to the first data connection between the GGSN, and establish a virtual relationship with the TE Ethernet connection; when the judgment result of the determination module 502 is negative, establishing a wireless access bearer with the PDP context corresponding to the Nth data connection with the GGSN N; N is a natural number greater than 1.

Further, the wireless data card provided by the embodiment of the present invention, as shown in FIG. 5, further includes: a comparison module 504 and a data forwarding module 505;

The receiving module 501 is further configured to receive an uplink IP data packet sent by the terminal device TE through a virtual Ethernet connection;

The comparing module 504 is configured to compare the PDP address in the PDP context corresponding to the uplink IP data packet with the source IP address of the uplink IP data packet;

The data forwarding module 505 is configured to: when the two are consistent, send the uplink IP data packet to the GGSN through the radio access bearer of the corresponding PDP context; when the two are inconsistent, update the uplink by using the PDP address in the corresponding PDP context. The source IP address in the IP data packet is sent to the GGSN by the updated uplink IP data packet through the radio access bearer of its corresponding PDP context.

Further, the receiving module 501 in the wireless data card provided by the embodiment of the present invention is further configured to receive a downlink IP data packet that is sent by the GGSN through the radio access bearer of the PDP context;

The comparing module 504 is further configured to compare the destination IP address of the downlink IP data packet with the IP address of the virtual Ethernet connection between the wireless data card and the terminal device TE;

The data forwarding module 505 is further configured to: when the two are consistent, forward the downlink IP data packet to the TE through the virtual Ethernet connection; when the two are inconsistent, update the destination IP address of the downlink IP data packet by using the IP address of the Ethernet connection. And forward the updated downstream IP packet to the TE over the virtual Ethernet connection.

The data connection establishing method, the data connection releasing method, the data transmitting method, and the wireless data card provided by the embodiment of the present invention, wherein the data establishing method determines when the wireless data card receives the TE initiated request for establishing a data connection with the GGSN Determining whether the data connection to be established is the first data connection between the TE and the wireless data card; if yes, establishing a radio access bearer with the PDP context corresponding to the first data connection between the GGSN, and Establishing a virtual Ethernet connection with the TE; if not, establishing between the wireless data card and the GGSN The Nth (N is a natural number greater than 1) data connection radio access bearers of the corresponding PDP context. The data connection establishing method provided by the embodiment of the present invention implements the wireless data card to support multiple PDP contexts in the RmNet dialing mode, thereby establishing multiple data connections between the terminal device TE and the network side GGSN, so that the user uses different Different services of APN can be carried out at the same time, and provide QoS guarantee for users of different types of applications to meet the needs of users for diverse data transmission. In addition, the data transmission method provided by the embodiment of the present invention can support the data transmission rate of the Rm interface, and the Pm protocol can be supported by the Rm interface, because the advantages of the RmNet data transmission mode are preserved. The PDP context approach may bring problems with the Rm port transmission rate bottleneck. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Claim

A data connection establishing method, the method comprising:

When the wireless data card receives the request initiated by the terminal device TE to establish a data connection with the gateway general packet radio service support node GGSN, it is determined whether the data connection that the request needs to establish is the first between the TE and the wireless data card. Data connection

If yes, the wireless data card establishes a packet data protocol PDP context radio access bearer corresponding to the first data connection with the GGSN, and establishes a virtual Ethernet connection with the TE; otherwise, the wireless data card A PDP context radio access bearer between itself and the GGSN is established according to the data connection between the TE and the wireless data card.

The method of claim 1, wherein the method further comprises: before the wireless data card receives a TE initiated request to establish a data connection with the GGSN, the method further comprising:

The method according to claim 1 or 2, wherein before the wireless data card receives the TE initiated request to establish a data connection with the GGSN, the method further includes:

4. A data connection release method, the method comprising:

A method for performing uplink data transmission, the method comprising: receiving, by a wireless data card, an uplink IP data packet sent by a TE through a virtual Ethernet connection; and the wireless data card transmitting a PDP context corresponding to the uplink IP data packet The PDP address in the comparison with the source IP address of the uplink IP data packet;

6. The method according to claim 5, wherein the PDP context corresponding to the uplink IP data packet is determined by:

The wireless data card matches the PDP context corresponding to the uplink IP data packet according to the pre-created service flow template.

The method according to claim 5 or 6, wherein after updating the source IP address in the uplink IP data packet, the method further includes:

Recalculate and modify the checksum of the upstream IP packet.

A method for performing downlink data transmission, the method comprising: receiving, by a wireless data card, a downlink IP data packet sent by a GGSN through a PDP context radio access bearer;

9. The method according to claim 8, wherein after updating the destination IP address in the downlink IP data packet, the method further comprises: recalculating and modifying the checksum of the downlink IP data packet.

10. A wireless data card, the method comprising:

11. The wireless data card of claim 10, further comprising a comparison module and a data forwarding module;

The wireless data card according to claim 10 or 11, wherein the receiving module is further configured to receive a downlink IP data packet that is sent by the GGSN through a PDP context radio access bearer; The comparing module is further configured to compare a destination IP address of the downlink IP data packet with an IP address of a virtual Ethernet connection between the wireless data card and the TE;

The data forwarding module is further configured to forward the downlink IP data packet to the TE through a virtual Ethernet connection when the comparison result of the comparison module is consistent; when the comparison result of the comparison module is inconsistent And updating, by using the IP address of the Ethernet connection, a destination IP address of the downlink IP data packet, and forwarding the updated downlink IP data packet to the TE through a virtual Ethernet connection.