WO2016177185A1

WO2016177185A1 - Method and apparatus for processing media access control (mac) address

Info

Publication number: WO2016177185A1
Application number: PCT/CN2016/077574
Authority: WO
Inventors: 苏清; 张玉磊
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-07-20
Filing date: 2016-03-28
Publication date: 2016-11-10
Also published as: CN106375489B; CN106375489A

Abstract

Provided are a method and apparatus for processing a media access control (MAC) address. The method comprises: receiving a request packet sent by a user equipment (UE), wherein the request packet carries combination information composed of access information about the UE and an MAC address; obtaining a designated MAC address having a mapping relationship with the combination information according to a preset rule; and replacing the combination information in the request packet with the designated MAC address, and sending the request packet carrying the designated MAC address to a server. By means of the present invention, the problem in the related art that DHCP devices cannot be distinguished due to the repeated MAC address is solved.

Description

Method and device for processing media access control MAC address

Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for processing a media access control MAC address.

Background technique

The Dynamic Host Configuration Protocol (DHCP) is a network configuration protocol that is optimized and extended based on the BOOTP protocol. DHCP packets are broadcasted and cannot pass through multiple subnets. However, in actual network deployment, DHCP servers are often not in the same subnet as DHCP users. Therefore, when DHCP packets are to traverse multiple subnets, DHCP is required. Following the existence, the DHCP relay deployed on the same subnet as the DHCP user passes the user request to the real DHCP server, and transmits the reply of the server to the user, so as to allocate dynamic configuration information for the user.

At present, the management of the user on the DHCP device is mainly through the user's hardware address. If it is Ethernet, it is the media access control (MAC) address that is often referred to as the MAC address of the same DHCP device. The MAC is used to centrally manage users accessing from the same or different paths. However, as the service expands, more and more user MAC addresses are duplicated, which causes the DHCP device to distinguish between these users.

The problem of the DHCP device being indistinguishable due to the repetition of the MAC address in the related art; there is currently no effective solution.

Summary of the invention

The embodiment of the invention provides a method and a device for processing a media access control MAC address, so as to at least solve the problem that the DHCP device cannot be distinguished because the MAC address is repeated in the related art.

According to an aspect of the present invention, a method for processing a media access control MAC address is provided, including: receiving a request message sent by a user equipment UE, where the request message carries a connection by the UE Combining information of the incoming information and the MAC address; obtaining a specified MAC address that has a mapping relationship with the combined information according to a preset rule; replacing the combined information in the request packet by the specified MAC address, and carrying The request message with the specified MAC address is sent to the server.

Optionally, the specified MAC address that has a mapping relationship with the combination information according to the preset rule includes: matching the combination information with the MAC address information in the mapping table according to a preset mapping table; And searching for the first specified MAC address corresponding to the combination information according to the mapping relationship in the mapping table; when the matching is inconsistent, calculating, by using a first preset algorithm, obtaining a second design that has a mapping relationship with the combined information MAC address.

Optionally, after the request message carrying the specified MAC address is sent to the server, the method The method further includes: receiving a response message of the server in response to the request message, where the response message carries the specified MAC address; and searching for a combination corresponding to the specified MAC address according to the mapping relationship And replacing the specified MAC address by the combination information, and sending the response message to the UE according to the combination information.

Optionally, the searching for the combination information corresponding to the specified MAC address according to the mapping relationship includes: when the mapping relationship does not exist in the mapping table, calculating, according to the mapping relationship, by using a second preset algorithm Combining information corresponding to the specified MAC address; or, when the mapping relationship exists in the mapping table, searching for combination information corresponding to the specified MAC address according to the mapping relationship in the mapping table.

Optionally, before receiving the request packet sent by the user equipment UE, the method further includes: configuring the mapping table locally.

According to another aspect of the present invention, a device for processing a media access control MAC address is provided, including: a first receiving module, configured to receive a request message sent by a user equipment UE, where the request message is Carrying combined information consisting of the access information and the MAC address information of the UE; the first processing module is configured to obtain a specified MAC address that has a mapping relationship with the combined information according to a preset rule; and a second processing module, setting And replacing the combination information in the request message with the specified MAC address, and sending the request message carrying the specified MAC address to a server.

Optionally, the first processing module includes: a matching unit, configured to match the combined information with the MAC address information in the mapping table according to a preset mapping table; and the first searching unit is configured to be consistent when the matching is consistent And searching, according to the mapping relationship in the mapping table, a first specified MAC address corresponding to the combination information; and the calculating unit is configured to calculate, by using a first preset algorithm, a mapping relationship with the combination information when the matching is inconsistent The second specified MAC address.

Optionally, after the request message carrying the specified MAC address is sent to the server, the device further includes: a second receiving module, configured to receive a response of the server in response to the request message a packet, wherein the response packet carries the specified MAC address; the search module is configured to search for combined information corresponding to the specified MAC address according to the mapping relationship; and the third processing module is configured as a The combined information replaces the specified MAC address, and sends the response message to the UE according to the combined information.

Optionally, the searching module includes: a calculating unit, configured to: when the mapping relationship does not exist in the mapping table, calculate, according to the mapping relationship, a second MAC address corresponding to the specified MAC address And the second search unit is configured to: when the mapping relationship exists in the mapping table, find the combination information corresponding to the specified MAC address according to the mapping relationship in the mapping table.

Optionally, before receiving the request message sent by the user equipment UE, the apparatus further includes: a configuration module, configured to preset the mapping table locally.

In the embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for executing a processing method of the media access control MAC address in the foregoing embodiment.

In the embodiment of the present invention, a new MAC address is mapped by a combination of access information and a MAC address of the user equipment. That is, the specified MAC address, that is, even if the MAC address of the request message sent by the user equipment is the same, as long as the access information is different, it can be mapped to a different new MAC address, thereby solving the related art because of the MAC address. The repetition causes the DHCP device to be indistinguishable, enabling the server to manage the user equipment of the same MAC address accessed from different access paths.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method for processing a media access control MAC address according to an embodiment of the present invention;

2 is a structural block diagram of a device for processing a medium access control MAC address according to an embodiment of the present invention;

3 is a block diagram 1 of an optional structure of a device for processing a medium access control MAC address according to an embodiment of the present invention;

4 is a block diagram 2 of an optional structure of a device for processing a medium access control MAC address according to an embodiment of the present invention;

5 is a block diagram 3 of an optional structure of a device for processing a medium access control MAC address according to an embodiment of the present invention;

6 is a block diagram 4 of an optional structure of a device for processing a medium access control MAC address according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a direct connection DHCP relay networking according to an alternative embodiment of the present invention; FIG.

8 is a timing diagram of a relay protocol interaction in accordance with an alternate embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In this embodiment, a method for processing a media access control MAC address is provided. FIG. 1 is a flowchart of a method for processing a media access control MAC address according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps. :

Step S102: The DHCP relay receives the request message sent by the user equipment UE, where the request message carries the combination information composed of the access information and the MAC address of the UE.

Step S104: The DHCP relay obtains a specified MAC address that has a mapping relationship with the combination information according to a preset rule.

Step S106: The DHCP relay replaces the combined information in the request packet by the specified MAC address, and sends the request packet carrying the specified MAC address to the server.

Through the steps S102 to S106 in this embodiment, the combination of the access information and the MAC address of the user equipment is adopted. Mapping a new MAC address, that is, the specified MAC address, that is, even if the MAC address of the request message sent by the user equipment is the same, as long as the access information is different, it can be mapped to a different new MAC address, thereby solving the problem. In the related art, the problem that the DHCP device cannot be distinguished due to the repetition of the MAC address enables the server to implement management of the user equipment of the same MAC address accessed from different access paths.

It should be noted that, in the foregoing steps S102 to S106, all operations are preferably performed by using a DHCP relay. Therefore, the following technical solutions of the present embodiment are described by taking a DHCP relay as an example, but In other application scenarios of the present invention, other devices may be used to complete the corresponding operations, and the server involved in this embodiment may be a DHCP server.

For the manner of obtaining the specified MAC address that has the mapping relationship with the combination information according to the preset rule in the step S104 of the embodiment, in the optional implementation manner of the embodiment, the method can be implemented as follows:

Step S11: The DHCP relay matches the combined information with the MAC address information in the mapping table according to the preset mapping table.

Step S12: When the DHCP relays match, the DHCP relay searches for the first specified MAC address corresponding to the combination information according to the mapping relationship in the mapping table.

Step S13: When the matching is inconsistent, the DHCP relay calculates a second specified MAC address that has a mapping relationship with the combined information by using the first preset algorithm.

It can be seen from the step S11 to the step S13 that there are two ways to obtain a specified MAC address in a mapping relationship with the combination information in the optional embodiment of the present embodiment. First, the DHCP relay matches the combined information to determine whether the local is Pre-storing the MAC address corresponding to the combined information; if yes, obtaining the specified MAC address of the combined information according to the pre-configured mapping table, if not, indicating that the specified MAC address corresponding to the combined information is not configured beforehand, The specified MAC address corresponding to the combined information is calculated according to a preset algorithm. It should be noted that the “designation” in the specified MAC address in this embodiment does not specifically refer to a certain MAC address, but generally refers to a MAC address that has a mapping relationship with the combined information.

In another optional implementation manner of this embodiment, after the request packet carrying the specified MAC address is sent to the server, the method in this embodiment may further include:

Step S21: The DHCP relay receiving server responds to the response message of the request message, where the response message carries the specified MAC address;

Step S22: The DHCP relay searches for combination information corresponding to the specified MAC address according to the mapping relationship.

Step S23: The DHCP relay replaces the specified MAC address by the combined information, and sends the response message to the UE according to the combined information.

It is known from the step S21 to the step S23 that the server sends a response message to the DHCP relay, and the response message carries the specified MAC address corresponding to the combined information. Therefore, after receiving the response message, the DHCP searches for the specified MAC address. The combined information corresponding to the address, thereby obtaining the access information and the MAC address in the combined information, thereby based on the access information The message and MAC address will send a response message to the user equipment.

According to the manner that the foregoing two types of obtaining the specified MAC address that are in the mapping relationship with the combination information, the manner of searching for the combination information corresponding to the specified MAC address according to the mapping relationship in the step S22 can be implemented as follows. :

Manner 1: When the mapping relationship does not exist in the mapping table, the combination information corresponding to the specified MAC address is calculated by using the second preset algorithm according to the mapping relationship;

Manner 2: When the mapping relationship exists in the mapping table, the combination information corresponding to the specified MAC address is found according to the mapping relationship in the mapping table.

In addition, it should be noted that, before receiving the request message sent by the user equipment UE, in this embodiment, the local configuration preset mapping table is further configured, where the combination information of the user equipment and the locally set MAC address are stored in the mapping table. Mapping relationship.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In this embodiment, a device for processing a media access control MAC address is also provided. The device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a device for processing a medium access control MAC address according to an embodiment of the present invention. As shown in FIG. 2, the device includes: a first receiving module 22, configured to receive a request message sent by a user equipment UE, where The request packet carries the combination information composed of the access information and the MAC address information of the UE. The first processing module 24 is coupled to the receiving module 22, and is configured to obtain a mapping relationship with the combined information according to the preset rule. The second processing module 26 is coupled to the first processing module 24 and configured to replace the combined information in the request message with the specified MAC address, and send the request message carrying the specified MAC address to the server.

FIG. 3 is a block diagram of an optional structure of a device for processing a media access control MAC address according to an embodiment of the present invention. As shown in FIG. 3, the first processing module 24 includes: a matching unit 32, configured to be configured according to a preset mapping table. The combination information is matched with the MAC address information in the mapping table. The first searching unit 34 is coupled to the matching unit 32, and is configured to search for the first designation corresponding to the combination information according to the mapping relationship in the mapping table when the matching is consistent. The computing unit 36 is coupled to the first searching unit 34, and is configured to calculate, by the first preset algorithm, a second designated MAC address that has a mapping relationship with the combined information when the matching is inconsistent.

4 is a block diagram 2 of an optional structure of a device for processing a media access control MAC address according to an embodiment of the present invention. As shown in FIG. 4, after the request message carrying the specified MAC address is sent to the server, the apparatus in this embodiment may further include: a second receiving module 42 and a second processing module 26 configured to receive the server in response to the request report. The response message of the message, wherein the response message carries the specified MAC address; the search module 44 is coupled to the second receiving module 42 and configured to search for the combined information corresponding to the specified MAC address according to the mapping relationship; the third processing module 46, coupled to the lookup module 44, configured to replace the designated MAC address with the combined information, and send the response message to the UE according to the combined information.

5 is a block diagram 3 of an optional structure of a device for processing a media access control MAC address according to an embodiment of the present invention. As shown in FIG. 5, the search module 44 includes: a calculating unit 52, configured to not exist in a mapping table in a mapping relationship. If the mapping relationship is used, the combination information corresponding to the specified MAC address is calculated according to the mapping relationship; or the second searching unit 54 is configured to use the mapping relationship in the mapping table when the mapping relationship exists in the mapping table. Find the combined information corresponding to the specified MAC address.

FIG. 6 is a block diagram of an optional structure of a device for processing a media access control MAC address according to an embodiment of the present invention. As shown in FIG. 6, the device further includes: a configuration module 62, before receiving a request message sent by the user equipment UE. And being coupled to the first receiving module 22, and configured to preset the configuration mapping table locally.

The invention is exemplified below by an alternative embodiment of the invention;

The present invention provides a solution to the same MAC conflict, which can implement management and control of IPOE users in the same MAC scenario accessed from different access paths.

FIG. 7 is a schematic diagram of a direct connection DHCP relay networking according to an alternative embodiment of the present invention. As shown in FIG. 7, the optional embodiment is applied to a DHCP relay device directly connected to a user. The technical solution of the optional embodiment is: mapping a new MAC by using the user access information and the user MAC, and replacing the hardware address of the user in the forwarded request message with a new MAC, and forwarding the replaced packet to the DHCP. The server, even if the hardware address field of the request message sent by the user is the same, as long as the access information is different, it can be mapped to a different new hardware address, and the request message processed by the DHCP relay is sent to the DHCP server. The MAC address is also different.

The steps of implementing the IPOE relay user access control in the same MAC scenario in the optional embodiment include:

Step A: The DHCP relay receives the DHCP request message, extracts the access side access information, and the chaddr field in the DHCP message, and uses the access side access information +chaddr field to index whether the corresponding mapped hardware address information exists. If yes, the obtained hardware address is obtained. If it does not exist, a new hardware address is mapped according to a preset algorithm, and the mapping relationship is recorded;

Step B: The new hardware address is replaced with the chaddr field of the request packet sent by the user, and forwarded to the DHCP server.

Step C: When the DHCP server responds, the chaddr field in the request message is carried in the chaddr field of the response packet;

Step D: The DHCP relay receives the response packet, and obtains the hardware address information from the chaddr field. The mapping relationship can be found in the mapping relationship and the original chaddr information of the user. The DHCP relay responds to the packet. The chaddr field is replaced with the original chaddr of the user, and the response message is sent to the user;

Step E: The processing of the request packet on the subsequent DHCP relay will repeat steps A and B;

In step F, the processing of the response message on the subsequent DHCP relay will repeat step D.

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

FIG. 8 is a timing diagram of a relay protocol interaction according to an alternative embodiment of the present invention. As shown in FIG. 8, the steps of the interaction include:

Step S801, the DHCP client sends a DHCPDISCOVER request message to the DHCP relay.

Step S802, the DHCP relay receives the DHCPDISCOVER request message, obtains a new hardware address according to the access information and the user MAC information in the request message, and sends a DHCP discover message;

The method of obtaining the new hardware address according to the access information and the user MAC information in the request packet is: obtaining the access information of the user access side and the user MAC information, and accessing the information + MAC lookup mapping table to check whether there is any Corresponding new hardware address, if any, obtain new hardware address; if not, obtain a new hardware address according to an algorithm, the algorithm must ensure different access information + MAC combination, the generated new hardware address is different, and record The mapping between the information + MAC and the new hardware address. The DHCP relay replaces the chaddr in the DHCPDISCOVER packet with the new hardware address and forwards it to the next-level DHCP relay or DHCP server.

Step S803, after receiving the DHCPDISCOVER, the DHCP server manages the user according to the new hardware address, and allocates dynamic configuration information to the user, and returns DHCPOFFER to the DHCP relay.

Step S804, the DHCP relay receives the DHCPOFFER, obtains the hardware address information from the chadger of the DHCPOFFER, searches the mapping table, obtains the user access information and the original hardware address of the user according to the mapping table record, and the DHCP relay saves the information allocated by the DHCP server, and The DHCPdiver's chaddr is replaced with the original hardware address of the user, and the DHCPOFFER message is sent to the DHCP client.

Step S805, the DHCP client sends a DHCPREQUEST request message to the DHCP relay.

Step S806: The DHCP relay receives the DHCPREQUEST request packet, obtains the user access side access information and the user MAC information, accesses the information + MAC lookup mapping table, obtains a new hardware address, and replaces the chaddr in the DHCPREQUEST message with the new hardware. Address and forward it to the next level DHCP relay or DHCP server.

Step S807, after receiving the DHCPREQUEST, the DHCP server returns a DHCPACK to the DHCP relay.

Step S808, the DHCP relay receives the DHCPACK, obtains the hardware address information from the chaddr of the DHCPACK, searches the mapping table, obtains the user access information and the original hardware address of the user according to the mapping table record, and the DHCP relay saves the information allocated by the DHCP server, and The CHADDR of the DHCPACK is replaced with the original hardware address of the user, and the DHCPACK packet is sent to the DHCP client. The process ends.

The optional embodiment adopts a method of mapping a new hardware address through the access side access information + hardware address on the DHCP relay, and replacing the user request message chaddr, so that the DHCP request message is processed after the direct connection relay processing. The hardware address in the device becomes the unique hardware address, which facilitates subsequent cascading DHCP relay or DHCP server to retain the original MAC address. To manage users, the problem of duplicate hardware address of DHCP request packets is solved in a simple manner, which provides greater convenience for service deployment.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

Step S1: The DHCP relay receives the request message sent by the user equipment UE, where the request message carries the combination information composed of the access information and the MAC address of the UE;

Step S2: The DHCP relay obtains a specified MAC address that has a mapping relationship with the combination information according to a preset rule.

Step S3: The DHCP relay replaces the combined information in the request packet by the specified MAC address, and sends the request packet carrying the specified MAC address to the server.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

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

Industrial applicability

In the embodiment of the present invention, the new MAC address, that is, the specified MAC address, is mapped by the combination of the access information and the MAC address of the user equipment, that is, even if the MAC address of the request packet sent by the user equipment is the same, As long as the access information is different, it can be mapped to different new MAC addresses, thereby solving the problem that the DHCP device cannot be distinguished because the MAC address is duplicated in the related art, so that the server can implement the same MAC accessing from different access paths. Management of the address of the user device.

Claims

A method for processing a media access control MAC address, including:

Receiving a request message sent by the user equipment UE, where the request message carries combined information consisting of the access information and the MAC address of the UE;

Obtaining a specified MAC address that has a mapping relationship with the combined information according to a preset rule;

And replacing, by the specified MAC address, the combination information in the request packet, and sending the request packet carrying the specified MAC address to a server.
The method according to claim 1, wherein the specifying the MAC address that has a mapping relationship with the combined information according to the preset rule comprises:

Matching the combined information with the MAC address information in the mapping table according to a preset mapping table;

When the matching is consistent, searching for a first specified MAC address corresponding to the combined information according to the mapping relationship in the mapping table;

When the matching is inconsistent, the second specified MAC address that has a mapping relationship with the combined information is calculated by using the first preset algorithm.
The method of claim 2, wherein after the request message carrying the specified MAC address is sent to the server, the method further comprises:

Receiving, by the server, a response message in response to the request message, where the response message carries the specified MAC address;

Finding, according to the mapping relationship, combination information corresponding to the specified MAC address;

And replacing the specified MAC address by the combination information, and sending the response message to the UE according to the combination information.
The method according to claim 3, wherein the searching for the combination information corresponding to the specified MAC address according to the mapping relationship comprises:

When the mapping relationship does not exist in the mapping table, the combination information corresponding to the specified MAC address is calculated by using a second preset algorithm according to the mapping relationship; or

When the mapping relationship exists in the mapping table, the combination information corresponding to the specified MAC address is found according to the mapping relationship in the mapping table.
The method according to claim 2 or 4, wherein before the receiving the request message sent by the user equipment UE, the method further comprises:

The mapping table is configured locally.
A device for processing a media access control MAC address, comprising:

The first receiving module is configured to receive the request message sent by the user equipment UE, where the request message carries the combination information that is composed of the access information and the MAC address information of the UE;

a first processing module, configured to obtain a specified MAC address that has a mapping relationship with the combined information according to a preset rule;

The second processing module is configured to replace the combination information in the request message by the specified MAC address, and send the request message carrying the specified MAC address to the server.
The apparatus of claim 6 wherein the first processing module comprises:

a matching unit, configured to match the combined information with the MAC address information in the mapping table according to a preset mapping table;

a first searching unit, configured to: when the matching is consistent, search for a first specified MAC address corresponding to the combined information according to a mapping relationship in the mapping table;

The calculating unit is configured to calculate, by the first preset algorithm, a second designated MAC address that has a mapping relationship with the combined information when the matching is inconsistent.
The apparatus of claim 7, wherein after the request message carrying the specified MAC address is sent to the server, the apparatus further comprises:

a second receiving module, configured to receive a response message of the server in response to the request message, where the response message carries the specified MAC address;

a searching module, configured to search for combined information corresponding to the specified MAC address according to the mapping relationship;

And a third processing module, configured to replace the specified MAC address by the combination information, and send the response message to the UE according to the combination information.
The apparatus of claim 8 wherein said means for finding comprises:

a calculating unit, configured to: when the mapping relationship does not exist in the mapping table, calculate, according to the mapping relationship, the combination information corresponding to the specified MAC address by using a second preset algorithm; or

The second searching unit is configured to: when the mapping relationship exists in the mapping table, find the combination information corresponding to the specified MAC address according to the mapping relationship in the mapping table.
The device according to claim 7 or 9, wherein, before receiving the request message sent by the user equipment UE, the apparatus further includes:

The configuration module is configured to configure the mapping table locally.