WO2012110004A1

WO2012110004A1 - Message forwarding method and device based on lte-lan

Info

Publication number: WO2012110004A1
Application number: PCT/CN2012/071270
Authority: WO
Inventors: 艾明; 徐晖; 秦飞
Original assignee: 电信科学技术研究院
Priority date: 2011-02-18
Filing date: 2012-02-17
Publication date: 2012-08-23
Also published as: CN102647768A; CN102647768B

Abstract

The present invention relates to the field of telecommunications, and discloses a message forwarding method and device based on LTE-LAN that enable a layer-two-based addressing technique to realize communication between an AP and other network elements in an LTE-LAN system. The method comprises: an AP receives a first data message from a first network element, acquires the identifying information of a UE and the layer-two identifying information configured corresponding to the identifying information of the UE, generates a second data message on the basis of the first data message, and transmits the second data message to a second network element according to the layer-two identifying information, the first network element and the second network element being a UE and a GW respectively, a GW and a UE respectively, or both GWs. The method thus solves the layer-two data message forwarding problem in LTE-LAN systems, enables communication between UEs, APs, and GWs, and reduces air interface expenditure. Also, an AP has no need for IP-layer forwarding functions, thereby effectively lowering AP manufacturing costs, and reducing the cost of LTE-LAN system network deployment, operation, and maintenance.

Description

LTE-LAN-based message forwarding method and device The application is filed on February 18, 2012, and the application number is 201110040584.1.

The priority of the Chinese patent application based on the LTE-LAN-based packet forwarding method and apparatus is hereby incorporated by reference in its entirety. The present invention relates to the field of communications, and in particular, to a packet forwarding method and apparatus based on LTE-LAN. BACKGROUND With the development of communication technologies, the requirements for communication network service shields are increasing. In order to further improve data processing efficiency and reduce data processing costs on the basis of existing networks, a new network architecture, called LTE, is designed. -LAN (Long Term Evolution-LAN, Long Term Evolution Local Network). Referring to FIG. 1 , in an LTE-LAN system, an LTE-LAN-AP (a wireless access point in an LTE-LAN system) provides a wireless data link for a terminal by using an existing LTE underlay transmission and access technology, thereby The terminal provides communication services with QoS guarantee. Both the LTE-LAN-AP and the terminal implement their respective functions based on the underlying communication technology of the LTE mobile communication system, that is, by adding new management and transmission scheduling functions to realize interconnection and interworking between the local wireless network and the terminals in the local network, and through transformation The network architecture and the high-layer protocol of the existing LTE system realize the IP access of the terminal to the external network without being processed by the carrier core network, that is, the LTE-LAN-AP of the local wireless network can pass through the corresponding interface without going through the core network. Direct access to the external network, such a flat network structure helps the terminal data to be processed and forwarded quickly, reducing the cost of network communication and improving efficiency. However, in order to reduce the system cost, the air interface between the terminal and the LTE-LAN-AP (ie, the Uu interface) is trunked based on the air interface in the LTE system, and the LTE-LAN-AP is a Layer 2 device without forwarding IP. The capability of data messages, therefore, in order to achieve communication between the terminal and the external network, between the terminal and the terminal, a two-layer addressing addressing mechanism suitable for the LTE-LAN system is needed.

In the prior art, there are various addressing addressing mechanisms, such as:

For the LTE system, the addressing addressing mechanism used by the Layer 2 at the air interface is to use RNTI (Radio Network Temporary Identifier) to identify and distinguish different terminals in a cell. In the middle, a C-RNTI (Cell Radio Network Temporary Identity) is used to uniquely identify a terminal. When the terminal needs to send data to the base station or the base station needs to send data to the terminal, the base station needs to perform radio resource scheduling based on the C-RNTI of the terminal and related information, such as radio interface configuration parameters, terminal capabilities, and the like, for resources used for data transmission. The allocation enables the terminal and the base station to transmit and receive data using the agreed radio resources. Since the communication between the terminals in the service area of a base station is both the station and the terminal, it is not required in the MAC packet transmitted by the actual air interface. The identity of the terminal is explicitly given.

The communication data between the terminal and the PDN GW (Packet Data Network Gateway) is based on the GTP-U (General Packet Radio Service Tunneling Protocol-User Plane) protocol. The tunnel is implemented. The IP data packet communicated between the terminal and the network, and the mapping between the LTE-air interface format and the GTP-U data format is completed at the base station; between the base station and the PDN GW, the GTP-U tunnel is used; in the PDN GW The PDN GW in the uplink direction of the Packet Data Network Gateway completes the decapsulation of the GTP-U data format to the IP data packet, and encapsulates the IP data packet into the GTP-U format in the downlink direction.

For the network using the IEEE 802.3 protocol (the 802.3 network), the address addressing mechanism used is a Layer 2 addressing technology, that is, the MAC address is uniquely identified in the Layer 2 network. entity. In this MAC address, the MAC address of the sender and the receiver must be clearly specified, that is, the source MAC address of the sender of the message and the destination MAC address of the receiver of the message.

For the network layer communication mechanism, the address addressing mechanism used is a three-layer addressing technology, that is, the interworking of devices based on IP addresses. At the head of the IP 4 message, the sender's IP address and the recipient's IP address need to be given.

For WLAN (Wireless Local Area Networks) based on the IEEE 802.11 series protocol, the address addressing mechanism used is based on the air interface and uplink interface, and the 802.3 network is used. Addressing addressing mechanism. The MAC address on the air interface also needs to clearly specify the MAC address of the sender and the receiver, that is, the source MAC address of the sender of the message and the destination MAC address of the receiver of the message. And the WLAN has the same address format as the MAC address format of the air interface and the MAC address used in the 802.3 network.

However, for LTE-LAN, the second layer of the uplink interface (ie, Iu-r interface) of LTE-LAN-AP is based on the 802.3 protocol. Based on cost considerations, LTE-LAN-AP is a Layer 2 device and does not have IP-based data forwarding capability. That is, LTE-LAN-AP positioning uses layer 2 to implement data packet forwarding without the function of a router. Therefore, LTE-LAN-AP is not applicable to Layer 3 addressing technology, and LTE-LAN-AP and LTE-LAN-GW (gateways in LTE-LANT systems) cannot use GTP-U tunnels. Mapping mechanism.

Further, since the LTE-LAN and the WLAN respectively use completely different physical layer technologies, the air interface of the LTE-LAN cannot directly use the layer 2 addressing technology in the WLAN; and the air interface in the LTE-LAN is The existing dedicated bearer mechanism is designed and implemented in a large amount of cylinders. For example, only one DRB (Data Radio Bearer) can be designed for one terminal. Considering that LTE-LAN communication is mainly between the terminal and the LTE-LAN-AP, it is not suitable to introduce a Layer 2 addressing technology based on or similar to the 802.3 network.

It can be seen that LTE-LAN-UE and LTE-LAN-GW can support the transmission and reception of three layers of data, but

LTE-LAN-AP only supports the forwarding of Layer 2 data packets. Therefore, it is necessary to redesign an adaptive Layer 2 addressing mechanism for LTE-LAN systems to implement LTE-LAN-AP and terminals (ie, LTE-LAN-UE). ), and interworking between LTE-LAN-GWs. SUMMARY OF THE INVENTION The embodiments of the present invention provide a LTE-LAN-based packet forwarding method and apparatus, which are used to implement interworking between an LTE-LAN-AP and other network elements based on a Layer 2 addressing technology.

Specific technical solutions provided by the embodiments of the present invention include:

A method for processing data based on a long-term evolution local network LTE-LAN, including:

The AP accesses the first data packet sent by the first network element.

The AP obtains the identifier information of the user terminal UE, and obtains the second layer identifier information for sending the second data packet according to the identifier information of the UE.

The AP generates a corresponding second data packet based on the first data packet.

The AP sends the second data to the second network element according to the layer 2 identification information.

A device for processing data based on a long-term evolution local network LTE-LAN, comprising:

a receiving unit, configured to receive first data sent by the first network element,

An obtaining unit, configured to obtain identification information of the UE of the user terminal, and acquire, according to the identifier information of the UE, Layer 2 identifier information for sending the second data.

a generating unit, configured to generate a corresponding second data based on the first data;

And a sending unit, configured to send the second data to the second network element according to the second layer identification information.

In the embodiment of the present invention, the identifier information of the UE is obtained according to the first data packet received by the first network element, and the second layer identifier information corresponding to the identifier information of the UE is obtained, and then based on the second layer identifier information and the second The first data element and the second network element may be the UE and the GW, respectively, and the second data element may be sent to the second network element, where the data may be sent to the second network element, where the first network element and the second network element may be the UE and the GW, respectively. GW and UE, respectively, can also be GW. In this way, the problem of forwarding Layer 2 data packets in the LTE-LAN system is solved, and data communication in the LTE-LAN system is realized, that is, UE, AP, and GW. Inter-communication saves the overhead of the air interface. On the other hand, because the above technology is used, there is no need to introduce an IP layer forwarding function in the AP, and the AP does not need to have a router function, thereby effectively reducing the device cost of the AP. It also reduces the cost of network deployment and operation and maintenance of the LTE-LAN system. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural diagram of an LTE-LAN system according to an embodiment of the present invention;

2 is a schematic structural diagram of a function of an LTE-LAN-AP according to an embodiment of the present invention;

FIG. 3 is a flowchart of processing data of LTE-LAN-AP in the embodiment of the present invention. detailed description In order to realize LTE-LAN-AP (hereinafter referred to as AP) and LTE-LAN-UE (terminal in LTE-LAN system, the following is called UE) and LTE-LAN-GW (hereinafter referred to as GW) In the embodiment of the present invention, the AP receives the first data sent by the first network element, determines the UE that sends the data, and the corresponding identifier, and according to the identifier of the UE. Obtaining the required second layer identification information for sending the second data packet, and generating corresponding second data according to the acquired second layer identification information and the received first data, and The second data packet is sent to the second network element.

The first network element may be a UE or a GW, and the second network element may be a GW or a UE. In this embodiment, in order to implement the foregoing technical solution, a mapping relationship between the UE and the 802.3 protocol-based MAC address allocated to the UE is preset in the AP, and the mapping relationship may be specifically determined by the identifier of the UE and allocated to the UE. The mapping between the MAC addresses of the 802.3 protocol. For example, the mapping relationship can be set to the form of Table 1:

Table 1

In Table 1, the mapping relationship between the C-RNTI value of the UE and the 802.3 protocol-based MAC address allocated by the AP to the UE is described. Further, the mapping between the IP address of the UE and the foregoing is also set. The MAC address of the 802.3 protocol allocated by the UE has a total of 6 bytes. Generally, the first 3 bytes of the MAC address are used to identify the vendor, and the last 3 bytes are allocated by the UE manufacturer. Preferably, in the present invention, the address of the actual Ethernet interface of the AP can be used as the first 3 bytes, and the last 3 bytes are allocated by the AP. For example, the UE can perform the C-RNTI value on the air interface. The unique identifier, therefore, the C-RNTI can be placed in two bytes of the last three bytes, and the remaining one byte can be freely allocated. Preferably, it can be set to the ID of the DRB of the UE, or, Is the specified field in the identity of the AP, and so on.

In addition, if the UE already has a MAC address based on the 802.3 protocol, and the UE has a WLAN interface, or has an Ethernet interface, the UE can report the existing MAC address based on the 802.3 protocol to the AP in the signaling message. The mapping between the UE and the UE based on the 802.3 protocol-based MAC address is saved in the form of Table 1.

Further, as shown in Table 1, the IP address of the UE may also be recorded in Table 1 to clarify the mapping relationship between the MAC address of the UE and the UE based on the 802.3 protocol and the IP address of the UE, so as to facilitate the subsequent communication process. This The points will be described in the subsequent embodiments.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , in the embodiment of the present invention, an LTE-LAN system includes an LTE-LAN-UE (a cylinder is called a UE), an LTE-LAN-AP (a cylinder is called an AP), and an LTE-LAN-GW (a nickname). GW ), wherein the Uu interface is used for communication between the UE and the AP, and the AP and the GW communicate according to the 802.3 protocol. Currently, the interface is referred to as an Iu-r interface.

As shown in FIG. 2, in the embodiment of the present invention, the AP includes a receiving unit 20, an obtaining unit 21, a generating unit 22, and a sending unit 23, where

An obtaining unit, configured to obtain the identifier information of the UE, and obtain, according to the identifier information of the UE, the layer 2 identifier information used to generate the second data.

As shown in FIG. 2, in the embodiment of the present invention, the method further includes a setting unit 24, configured to set a MAC address of the UE for the UE, and set a C-RNTI of the UE and a MAC address of the UE, and between the IP addresses of the UE. Mapping relationship.

The obtaining unit may obtain the identifier information of the UE according to the first data packet, or may obtain the data in the other sending and receiving process.

Referring to FIG. 3, in the embodiment of the present invention, the detailed process of processing data by the AP is as follows:

Step 300: The first data packet sent by the first network element is received.

In this embodiment, the transmission of the data is divided into two directions:

In the uplink direction, the UE sends an uplink message to the ,, and after receiving, forwards the uplink message to the GW, and the GW performs three layers of processing.

Downstream direction: The GW sends a downlink packet to the ,, and then forwards the downlink packet to the UE after receiving.

Therefore, the received first data packet may be either an uplink packet or a downlink packet, and the first network element that sends the first data packet may be a UE or a GW.

Step 310: The AP obtains the identifier information of the UE, and obtains the second layer identifier information used to send the second data packet according to the identifier information of the UE.

In this embodiment, the first data packet sent by the UE or the first data packet sent by the GW may include the identifier information of the UE, where the identifier information may be the C-RNTI of the UE, or may be the UE. The MAC address may also be the IP address of the UE. The AP may obtain the identifier information of the UE according to the received first data packet, and the AP may obtain the identifier information of the UE by using other methods, such as the sending and receiving process, and then the AP according to Table 1 The mapping relationship is set to obtain the layer 2 identifier information. In this embodiment, the layer 2 identifier information may be the MAC address of the UE or the C-RNTI of the UE. The second layer of the second layer identification information is lower than the network layer. Step 320: The AP generates a corresponding second data packet based on the received first data packet.

In this embodiment, the AP generates the second data packet based on the first data packet, so that the first data is encapsulated into the second layer data according to the second layer identifier information, so that the AP can be used to avoid Three-layer data processing is performed on the first data.

Step 330: The AP sends the generated second data packet to the second network element according to the layer 2 identification information.

In the same manner as step 300, the second data packet generated by the AP may be an uplink packet or a downlink packet, and the second network element may be a GW or a UE.

Based on the above embodiments, the following is described in detail in three specific embodiments.

In the first case, the first network element is the UE, the second network element is the GW, the first data is the uplink data, and the second data is the uplink data. 300 - Step 330 is performed as follows:

Step 3001: The AP receives the uplink message a sent by the UE.

In the embodiment of the present invention, the MAC frame format used by the AP to receive the uplink information sent by the UE to the AP based on the LTE-LAN air interface (ie, the Uu interface) is as shown in Table 2:

Table 2

MAC Header SDU PADDING its towel,

The MAC header is a MAC header implementation based on the LTE air interface, and needs to be defined in the LTE-LAN system. However, the present invention proposes that address information or identification information of the transmitting and receiving parties is not included therein;

An SDU (Service Data Unit) for recording IP data sent by the UE;

PADDING: Populate the field.

Step 3011: The AP determines, according to the uplink packet a sent by the UE, the identifier information of the UE, that is, the C-RNTI of the UE, and obtains the MAC address of the UE according to the C-RNTI, where the MAC address is used to generate and forward the GW to the GW. The second layer identification information of the uplink 4 text b.

In the embodiment of the present invention, the C-RNTI of the UE may be obtained by the AP implicitly when the uplink packet a is sent, that is, before the UE sends the uplink message a, the system performs resource scheduling for the UE. The radio bearer resource for carrying the uplink packet a is allocated. Therefore, the AP can know which UE the sender is based on the radio bearer resource used when the UE sends the uplink packet a, that is, the C-RNTI of the transmitting UE can be known.

After obtaining the C-RNTI of the UE, the AP can obtain the MAC address of the UE corresponding to the C-RNTI preset based on the mapping relationship set in Table 1.

Step 3021: The AP generates an uplink packet b sent to the GW according to the obtained MAC address of the UE and the uplink packet a sent by the UE.

In this embodiment, the format of the MAC frame used by the AP for the uplink packet is as shown in Table 3. The MAC frame is The format is based on the 802.3 protocol:

table 3

Its towel,

The SRC MAC ADDR (Source MAC address), which is usually set to 6 bytes, is used to record the MAC address of the UE, that is, the 802.3 protocol-based MAC address set by the C-RNTI of the corresponding UE determined in step 3011;

DEST MAC ADDR (destination MAC address), usually set to 6 bytes, used to record the MAC address of the GW, which is also compliant with the 802.3 protocol;

In practical applications, the AP is usually connected to a GW, so the MAC address of the GW can be obtained through pre-configuration or protocol interaction.

DATA (data), used to record IP data.

The AP needs to encapsulate the IP data packet recorded in the SDU field of the uplink packet a DATA field without modification. Preferably, the packet can be encapsulated by the LLC (Logical Link Control) protocol. The field length is variable;

In addition, the following fields are also set:

Preamble (preamble field), usually set to 7 bytes, indicating the beginning of a MAC frame;

TYPE (type), usually set to 2 bytes, fill in 0x8000, indicating that the DATA field records IP data packets;

FCS (Frame Check Sequence) is a 32-bit CRC (Cyclic Redundancy Check).

Step 3031: The AP sends the uplink packet b to the GW.

In this way, the AP completes the forwarding of the Layer 2 data packet from the UE to the GW, so that the GW can extract the IP data packet and perform the three-layer data processing on the received Layer 2 data packet.

In the second case, it is assumed that the first network element is the GW, and the second network element UE, the first data packet is the downlink packet a, and the second data packet is the downlink packet, then the step 300 is performed. - The execution of step 330 is as follows:

Step 3002: The AP receives the downlink packet a sent by the GW.

In the embodiment of the present invention, the MAC frame format of the downlink message a sent by the GW, which is received by the AP based on the uplink interface (ie, the Iu-r interface), is as shown in Table 3, where

SRC MAC ADDR (source MAC address), usually set to 6 bytes, used to record the MAC address of the GW, which is also in compliance with the 802.3 protocol; The DEST MAC ADDR (destination MAC address), which is usually set to 6 bytes, is used to record the MAC address of the UE, that is, the MAC address of the UE that is sent to the GW in the uplink packet a;

DATA, used to record the IP data of the GW reply.

For the setting of the remaining fields, refer to step 3021, and details are not described herein.

Step 3012: The AP determines, according to the downlink message a sent by the GW, the identifier information of the UE, that is, the MAC address of the UE, and obtains the C-RNTI of the UE according to the MAC address, where the C-RNTI is used to generate and forward to the UE. Downstream • The second layer of identification information of the b.

In the embodiment of the present invention, after obtaining the MAC address of the UE, the AP may obtain the C-RNTI of the UE corresponding to the MAC address preset based on the mapping relationship set in Table 1.

Step 3022: The AP generates a downlink packet b sent to the UE according to the obtained C-RNTI of the UE and the downlink packet a sent by the GW.

Specifically, when the AP generates the downlink packet b, the AP may determine the C-RNTI of the UE that receives the downlink B in advance, and may determine to send the downlink packet b according to the C-RNTI of the UE and other related information. The radio bearer resources are used, and the radio bearer resources are scheduled to ensure that the UE can receive the downlink packet b.

In this embodiment, the format of the MAC frame used by the AP to generate the downlink packet is as shown in Table 2, where

The SDU is used to record the IP data sent by the GW, that is, the content recorded in the DATA field in the downlink message a of the GW;

For the setting of the remaining fields, refer to step 3000, and details are not described here.

In the actual application, the IP data packet included in the uplink packet of the UE can only be forwarded to the GW for processing at the AP, and the UE only needs to process the IP data packet returned by the GW. In step 3022, it is not necessary to The 802.3 protocol-based MAC address and the GW's MAC address assigned to the UE are placed as the destination address and the source address in the MAC header field in the downlink packet b as the addressing information.

Step 3032: The AP sends the downlink packet b to the UE.

In this way, the AP completes the forwarding of the Layer 2 data packet from the GW to the UE, so that the UE can extract the IP data packet and perform the three-layer data processing on the received Layer 2 data packet.

Different from the above two cases, there is a special case where the first network element and the second network element are both

For the GW, the first data is an ARP (Address Resolution Protocol) request message, and the second data is an ARP response message, and the step 300_step 330 is performed as follows:

Step 3003: The AP receives the downlink message C sent by the GW, that is, the ARP request message.

In an actual application, an ARP request message usually carries an IP address of a certain network element, and the purpose is to obtain the use of the IP address.

The MAC address of the network element of the IP address is used to encapsulate and send the corresponding data packet. In the embodiment of the present invention, the ARP request message sent by the GW carries the IP address of the UE.

On the other hand, the AP may obtain the IP address of the UE during the initial access of the UE to the LTE-LAN system. I will not repeat them here.

Step 3013: The AP determines the identity information of the UE, that is, the IP address of the UE, based on the ARP request message sent by the GW, and obtains the MAC address of the UE according to the IP address, where the MAC address is used to generate an ARP response message that is returned to the GW. The second layer of identification information.

In the embodiment of the present invention, after obtaining the IP address of the UE, the AP may obtain the MAC address of the UE corresponding to the IP address preset according to the mapping relationship set in Table 1.

Step 3032: The AP generates an uplink message C, that is, an ARP response message, sent to the GW according to the obtained MAC address of the UE and the ARP request message sent by the UE.

In this embodiment, the AP encapsulates the obtained MAC address of the UE in the specified field of the uplink packet c, and returns it to the GW as an ARP response message.

Unlike the existing PROXY (proxy) AP protocol, in the ARP response message, the AP returns

It is the 802.3-based MAC address of the UE, not the MAC address of the AP. Therefore, when the subsequent GW sends the downlink message, the MAC address of the UE can be directly used as the destination MAC address, according to the MAC frame format as shown in Table 3. The downlink packet is encapsulated, and the downlink packet is transparently transmitted to the UE through the AP, so that the AP does not need to perform Layer 3 data processing on the transparently transmitted downlink packet, so that the AP can communicate with the UE and the GW.

In summary, in the embodiment of the present invention, the AP receives the first data packet received by the first network element, obtains the identifier information of the UE, and obtains the identifier information of the corresponding UE to obtain the second layer identifier for forwarding the packet. And generating the second data according to the second layer identification information and the first data, and sending the second data to the second network element, where the first network element and the second network element It can be the UE and the GW, or the GW and the UE respectively, or both of them can be the GW. In this way, the problem of forwarding the Layer 2 data in the LTE-L AN system is solved, and the LTE-L AN system is realized. The data communication, that is, the interworking between the UE, the AP, and the GW, saves the overhead of the air interface. On the other hand, because the above technology is used, there is no need to introduce an IP layer forwarding function in the AP, and the AP does not need to have The router function effectively increases the device cost of the AP, and also reduces the cost of network deployment and operation and maintenance of the LTE-LAN system.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

A method for processing data according to a long-term evolution local network LTE-LAN, characterized in that: the wireless access point AP receives the first data packet sent by the first network element;

The method according to claim 1, wherein when the first network element is a UE and the second network element is a gateway GW, the AP obtains identification information of the UE, and according to the UE The identifier information is used to obtain the second layer identifier information for sending the second data, and includes: obtaining the cell radio network temporary identifier C-RNTI of the UE, and acquiring media access control corresponding to the UE preset by the C-RNTI MAC address.

The method according to claim 2, wherein the AP generates a corresponding second data packet based on the first data packet, including:

The AP encapsulates the second data packet by using a MAC frame format of the 802.3 protocol, where the AP encapsulates the MAC address of the UE in a source MAC address SRC MAC ADDR field of the second data. The MAC address of the GW is encapsulated in the destination MAC address DEST MAC ADDR field of the second data, and the service data unit SDU field in the first data is encapsulated in the second data packet. Data DATA field.

The method according to claim 1, wherein when the first network element is a gateway GW and the second network element is a UE, the AP obtains identification information of the UE, and according to the identification information of the UE And obtaining, by the AP, the media access control MAC address of the UE, and obtaining the cell radio network temporary identifier C-RNTI of the UE according to the MAC address.

The method according to claim 4, wherein the AP generates a corresponding second data packet based on the first data packet, including:

The AP parses the first data packet according to the MAC frame format of the 802.3 protocol, and encapsulates the DATA field in the first data packet in an SDU field of the second data packet.

The method of claim 1, wherein when the first network element and the second network element are gateway GWs, the AP obtains the identification information of the UE, and obtains the identifier information according to the information of the UE. The layer 2 identification information used for sending the second data packet includes: the AP obtains the IP address of the UE, and obtains the MAC address of the UE corresponding to the IP address preset.

The method according to claim 6, wherein the AP generates a corresponding second data packet based on the first data packet, including: The AP determines that the first data address is an address resolution protocol ARP request message, and encapsulates the MAC address of the UE in a specified field of the second data packet as an ARP response message.

The method according to claim 2, 4 or 6, wherein the MAC address of the UE obtained by the AP is previously sent by the UE to the AP for storage, or is set by the AP in advance for the UE.

The method of claim 4, wherein when the AP sets a MAC address for the UE in advance, the method includes: setting a MAC address of the UE to 6 bytes, where the first 3 bytes are used. The address of the Ethernet interface of the AP is recorded. Two bytes of the last three bytes are used to describe the C-RNTI of the UE, and one byte is used to record the identifier of the data radio bearer DRB of the UE, or The specified field in the identity of the AP.

An apparatus for processing a data packet based on a long-term evolution local network LTE-LAN, comprising: a receiving unit, configured to receive first data sent by the first network element;

The obtaining unit is configured to obtain the identifier information of the user terminal UE, and obtain the second layer identifier information used for sending the second data according to the identifier information of the UE;

The device according to claim 10, wherein, when the first network element is a UE and the second network element is a gateway GW, the acquiring unit obtains identification information of the UE, and according to the UE And obtaining, by the acquiring unit, the layer 2 identification information of the second data, the method includes: obtaining, by the acquiring unit, a cell radio network temporary identifier C-RNTI of the UE, and acquiring the UE corresponding to the preset by the C-RNTI Media access control MAC address.

The device according to claim 11, wherein the generating unit generates a corresponding second data packet based on the first data packet, including:

The generating unit encapsulates the second data packet by using a MAC frame format of the 802.3 protocol, where the AP encapsulates the MAC address of the UE in a source MAC address SRC MAC ADDR field of the second data Encapsulating the MAC address of the GW in a destination MAC address DEST MAC ADDR field of the second data, and encapsulating the service data unit SDU field in the first data packet in the second data The data DATA field of the message.

The device according to claim 10, wherein, when the first network element is a gateway GW and the second network element is a UE, the acquiring unit obtains identification information of the UE, and according to the identifier of the UE And the obtaining, by the acquiring unit, the media access control MAC address of the UE, and obtaining the cell radio network temporary identifier C-RNTI of the UE.

The device according to claim 13, wherein the generating unit generates a corresponding second data based on the first data packet, and includes:

The generating unit parses the first data according to the MAC frame format of the 802.3 protocol, and encapsulates the DATA field in the first data packet in an SDU field of the second data packet.

The device according to claim 10, wherein, when the first network element and the second network element are both gateway GWs, the acquiring unit obtains identification information of the UE, and according to the identification information of the UE Obtaining the layer 2 identifier information for sending the second data packet, the method includes: obtaining, by the acquiring unit, an IP address of the UE, and acquiring a MAC address of the UE that is preset corresponding to the IP address.

The device according to claim 15, wherein the generating unit generates a corresponding second data based on the first data, including:

The generating unit determines that the first data is an address resolution protocol ARP request message, and encapsulates the MAC address of the UE in a specified field of the second data packet as an ARP response message.

The device according to claim 11, 13 or 15, wherein the MAC address of the UE obtained by the acquiring unit is previously sent by the UE to the device for storage, or is preset to the UE by the setting unit in the device. Make settings.

The device according to claim 17, wherein the setting unit sets a MAC address for the UE in advance, comprising: setting a MAC address of the UE to 6 bytes, where the first 3 bytes are used. In the address of the Ethernet interface of the device, two bytes of the last three bytes are used to describe the C-RNTI of the UE, and one byte is used to record the identifier of the data radio bearer DRB of the UE, or The specified field in the identification of the device is recorded.