WO2017147779A1

WO2017147779A1 - Data transmission method, device and system

Info

Publication number: WO2017147779A1
Application number: PCT/CN2016/075147
Authority: WO
Inventors: 刘菁; 黄敏; 曾可; 舒兵
Original assignee: 华为技术有限公司
Priority date: 2016-03-01
Filing date: 2016-03-01
Publication date: 2017-09-08

Abstract

The present invention relates to the technical field of radio communications. Disclosed are a data transmission method, device and system, for use in resolving the problem in an existing connectionless data transmission mechanism of increase in resource overhead due to that all base stations need to send paging messages carrying downlink data to the UE. The data transmission method comprises: a first MTC GW receives first uplink data that carries a UE identifier and is sent by a first base station; determining, according to the UE identifier in the first uplink data, that the UE is located in the coverage of the first base station; and triggering, by sending downlink data of the UE to the first base station, the first base station to send a first paging message to the UE, wherein the first paging message comprises downlink data of the UE.

Description

Data transmission method, device and system

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, device, and system.

Background technique

In the long-term evolution (English term: Long Term Evolution, English abbreviation: LTE) mechanism, when the user equipment in the idle state (English name: User Equipment, English abbreviation: UE) has downlink data arriving, usually the downlink data The anchor will be on the service gateway (English full name: Serving Gateway, English abbreviation: SGW). The SGW then informs the mobility management device (English name: Mobility Management Entity, English abbreviation: MME) to initiate paging to the UE on all base stations (eNBs) in its paging area. After receiving the paging message, the UE determines whether the network side finds itself according to the UE identifier carried in the paging message. If yes, the UE needs to change from the idle state to the active state to trigger the random access procedure, and establish a radio resource control (English full name: Radio Resource Control, English abbreviation: RRC) connection and air interface data radio bearer with the eNB. And a GTP (GPRS Tunneling Protocol) tunnel is established between the eNB and the SGW, so that the SGW sends the buffered downlink data to the UE through the established GTP tunnel and the air interface data radio bearer. The specific implementation process is as shown in FIG. 1 .

The foregoing implementation process requires a large amount of interaction between RRC signaling and S1 signaling when performing RRC connection establishment. In order to reduce the overhead of signaling, the industry tends to use the connectionless data transmission mode shown in FIG. 2 to transmit downlink data. When the idle UE arrives with the downlink data, the downlink data is directly included in the paging message, and the SGW notifies the MME to initiate the paging message carrying the downlink data to the UE on all the base stations (eNBs) in the paging area. . After receiving the paging message, the UE determines whether the network side finds itself according to the UE identifier carried in the paging message; if yes, the UE directly obtains the downlink data carried by the paging.

Although the technical solution shown in FIG. 2 does not require the UE to enter the connection state, the RRC signaling and the S1 signaling overhead are reduced. However, the paging message carrying the downlink data in the mechanism is that all the base stations in the paging area are to the UE. Sended, this will bring a lot of resource overhead.

Summary of the invention

The embodiments of the present invention provide a data transmission method, device, and system, to solve the problem that the resource overhead caused by paging messages carrying downlink data is required to be transmitted by all base stations to the UE in the existing connectionless data transmission mechanism.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a data transmission method, which is applied to a first machine type communication gateway MTC GW, and the method may include:

Receiving, by the first base station, first uplink data that carries the UE identifier, where the UE identifier is used to identify the UE;

Determining, according to the identifier of the UE, that the UE is in a coverage of the first base station, where the UE does not establish a radio resource control RRC connection with the first base station;

The first base station is triggered to send a first paging paging message including downlink data of the UE to the UE by sending the downlink data of the UE to the first base station.

In this way, the uplink data carried by the base station and carrying the UE identifier can be used to make the MTC GW accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the base station. The downlink data is carried by the base station to the UE by using the paging message, so that the paging message sent by the multiple base stations to carry the downlink data is sent to the UE in the case that the specific location of the UE is not determined in the existing mechanism. The problem of a lot of resource overhead.

The first uplink data may be generated by the first base station according to the second uplink data that is sent by the UE by the first base station, where the second uplink data includes the UE identifier, and may be moved to the first base station by the UE. Data that is actively reported to the first base station when the UE is successfully paged by the first base station, and may be reported to the UE after being successfully paged by the first base station. First base station, Specifically, in an achievable manner of the first aspect,

Before the first MTC GW receives the first uplink data sent by the first base station, if the first MTC GW receives the downlink data of the UE, the first MTC GW sends to all the base stations connected to the first MTC GW. a second paging message, where the second paging message includes the UE identifier;

After receiving the second paging message, each base station of each of the base stations pages the UE by using a third paging message within its coverage; the all base stations include the first base station;

If the third paging message sent by the first base station is successfully paged to the UE, the first base station receives the second uplink data that is sent by the UE and carries the identifier of the UE and the identifier of the first MTC GW, and according to the identifier of the first MTC GW. Sending the first uplink data to the first MTC GW.

The second uplink data is reported by the UE to the first base station when the UE moves to the coverage of the first base station (eg, the coverage from the coverage of the second base station to the coverage of the first base station). Data, if the UE is an illegal user, it will cause unnecessary troubles for subsequent data transmission. Therefore, in order to ensure the security of subsequent data transmission, the UE needs to be verified by the first base station or the first MTC GW. legality.

Therefore, in a further implementation manner of the first aspect, when the second uplink data is data that is actively reported when the UE moves to the range of the first base station, the second uplink data further includes: the first MTC GW The identifier and the message authentication code MAC; the first uplink data further includes: the MAC; the receiving the first uplink data sent by the first base station includes:

Receiving, by the first base station, first uplink data that is sent according to the first MTC GW identifier;

And before determining that the UE is in the coverage of the first base station, according to the UE identifier in the first uplink data, the method further includes:

Searching, on the first MTC GW, key information of a UE corresponding to the UE identifier;

Performing an integrity check on the MAC by using key information of the UE;

If the integrity check is successful, it is determined that the UE is a legitimate UE.

Or the second uplink data further includes: an identifier of the second MTC GW and the MAC; the first uplink data further includes: the identifier of the MAC and the second MTC GW;

Sending a request message to the second MTC GW according to the identifier of the second MTC GW; the request message includes the UE identifier, and the request message is used to request to search for the UE on the second MTC GW Identifying key information of the corresponding UE;

Receiving key information of the UE sent by the second MTC GW;

Performing an integrity check on the MAC by using key information of the UE;

Or the second uplink data further includes: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station, where the MAC is used to determine, by the first base station Whether the UE is a legal UE, and the receiving the first uplink data sent by the first base station includes:

Receiving, by the first base station, first uplink data that is sent according to the identifier of the first MTC GW after confirming that the UE is a legal UE; the identifier of the first MTC GW is: the first base station from the first Obtained at the second base station.

Or the second uplink data further includes: an identifier of the second base station and a MAC; the MAC is used to enable the first base station to determine whether the UE is a legal UE, and the receiving the first base station sends The first uplink data includes:

Receiving, by the first base station, first uplink data that is sent to the first MTC GW after confirming that the UE is a legal UE.

In this way, the verification of the legitimacy of the UE by the first MTC GW or the first base station ensures the security of subsequent data transmission.

In a second aspect, an embodiment of the present invention provides a data transmission method, which is applied to a first base station, where the method includes:

Sending the first uplink data to the first machine type communication gateway MTC GW, where the first uplink data is used by the first MTC GW to determine, according to the UE identifier in the first uplink data, that the UE is in the first The coverage of the base station, where the first uplink data includes: the UE identifier; the UE identifier is used to identify the UE; and the UE and the first base station do not establish a radio resource control RRC connection;

Receiving downlink data of the UE sent by the first MTC GW;

Sending a first paging paging message to the UE, where the first paging message includes downlink data of the UE.

In this way, the first uplink data may be sent to the first device type communication gateway MTC GW, so that the MTC GW can accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly correct the downlink data of the UE. Routed to the base station, the base station carries the downlink data to the UE by using a paging message, thereby avoiding the paging message of the downlink data carried by multiple base stations to the UE in the case that the specific location of the UE is not determined in the existing mechanism. The problem of a large amount of resource overhead caused by sending a page.

The first uplink data may be generated by the first base station according to the second uplink data that is sent by the UE by the first base station, where the second uplink data includes the UE identifier, and may be moved to the first base station by the UE. Data that is actively reported to the first base station when the UE is successfully paged by the first base station, and may be reported to the UE after being successfully paged by the first base station. The first base station, specifically, in an implementation manner of the second aspect, before the sending the first uplink data to the first machine type communication gateway MTC GW, the method further includes:

Receiving a second paging message sent by the first MTC GW; the second paging message includes: an identifier of the UE;

Paging the UE by using a third paging message within the coverage of the first base station;

Receiving, by the UE, the second uplink data that is returned by the UE; the second uplink data is used to notify the first base station that the UE is paged; and the second uplink data includes: the UE identifier and the first The identity of the MTC GW;

Sending the first uplink data packet to the first machine type communication gateway MTC GW include:

And transmitting first uplink data to the first MTC GW according to the identifier of the first MTC GW.

That is, in a further implementation manner of the second aspect, when the second uplink data is the data that is actively reported when the UE moves to the range of the first base station, the second uplink data further includes: the second MTC GW. And the first uplink data includes: the MAC and the identifier of the second MTC GW; the sending, by the first machine type communication gateway MTC GW, the first uplink data includes:

And sending, by the first MTC GW, the first uplink data to the first MTC GW, where the first uplink data is used by the first MTC GW to determine, according to the MAC, that the UE is a legal UE.

Or the second uplink data further includes: an identifier of the second MTC GW and the MAC; the first uplink data further includes: an identifier of the MAC and the second MTC GW, where the first uplink data is used The first MTC GW obtains key information of the UE from the second MTC GW, and determines that the UE is a legal UE according to the key information of the UE and the MAC.

Or the second uplink data further includes: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station; after receiving the second uplink data sent by the UE Before the first uplink data is sent to the first MTC GW, the method further includes:

Sending a request message to the second base station according to the identifier of the second base station; the request message includes an identifier of the UE, where the request message is used to request the second base station to query according to the identifier of the UE Corresponding to the UE stored in the second base station Key information

Receiving key information of the UE sent by the second base station;

Performing an integrity check on the MAC by using key information of the UE;

Or the second uplink data further includes: an identifier of the second base station and a MAC; after receiving the second uplink data sent by the UE, before sending the first uplink data to the first MTC GW, The method also includes:

Sending a request message to the second base station according to the identifier of the second base station, and sending a notification message to the second base station, to notify the second base station to release context information of the UE stored in the second base station; The request message includes an identifier of the UE, and the request message is used to request the second base station to query, according to the identifier of the UE, key information corresponding to the UE stored in the second base station;

Receiving key information of the UE sent by the second base station;

Performing an integrity check on the MAC by using key information of the UE;

In a third aspect, an embodiment of the present invention provides a machine type communication gateway MTC GW, where the MTC GW may include:

a receiving unit, configured to receive first uplink data sent by the first base station; the first uplink data includes a user equipment UE identifier; and the UE identifier is used to identify the UE;

a determining unit, configured to determine, according to the UE identifier in the first uplink data that is received by the receiving unit, that the UE is in a coverage range of the first base station, where the UE is not established with the first base station Radio resource control RRC connection;

a sending unit, configured to: after the determining unit determines that the UE is in the coverage of the first base station, trigger the first base station to send to the UE by sending downlink data of the UE to the first base station Sending a first paging paging message including downlink data of the UE.

In this way, the MTC carrying the UE identifier transmitted by the base station can be used to make the MTC. The GW accurately knows that the UE is in the coverage of the base station, and when there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the base station, and the base station carries the downlink data to the UE by using a paging message, thereby The problem of a large amount of resource overhead caused by paging messages sent by multiple base stations carrying downlink data to the UE in the case of notifying the specific location of the UE in the existing mechanism is avoided.

The first uplink data may be generated by the first base station according to the second uplink data that is sent by the UE by the first base station, where the second uplink data includes the UE identifier, and may be moved to the first base station by the UE. Data that is actively reported to the first base station when the UE is successfully paged by the first base station, and may be reported to the UE after being successfully paged by the first base station. The first base station, specifically, in an achievable manner of the first aspect,

The receiving unit is further configured to: before receiving the first uplink data sent by the first base station, receive downlink data of the UE sent by the serving gateway;

The sending unit is further configured to send a second paging message to all base stations connected to the MTC GW, where the second paging message includes the UE identifier; and the second paging message is used by all the base stations After receiving the second paging message, each base station in each of the base stations pages the UE by using a third paging message within its coverage; the all base stations include the first base station;

The receiving unit is specifically configured to receive, by the first base station, the first uplink data that is sent by the first base station to the MTC GW according to the identifier of the MTC GW;

The first uplink data is generated by the first base station according to the received second uplink data sent by the UE, and the second uplink data is used to notify the first base station that the UE is paged to The second uplink data includes: the UE identifier and an identifier of the MTC GW.

The second uplink data is reported by the UE to the first base station when the UE moves to the coverage of the first base station (eg, the coverage from the coverage of the second base station to the coverage of the first base station). Data, if the UE is an illegal user, it will cause unnecessary troubles for subsequent data transmission. Therefore, in order to ensure the security of subsequent data transmission, the UE needs to be verified by the first base station or the first MTC GW. Legal Sex.

Therefore, in a further implementation manner of the third aspect, when the second uplink data is data that is actively reported when the UE moves to the range of the first base station, the second uplink data further includes: the MTC GW And the message authentication code MAC; the first uplink data further includes: the MAC;

The receiving unit is specifically configured to receive first uplink data that is sent by the first base station according to the MTC GW identifier;

The MTC GW further includes a check unit,

The checking unit is configured to search, on the MTC GW, key information of the UE corresponding to the UE identifier, before the determining unit determines that the UE is within the coverage of the first base station;

Performing an integrity check on the MAC by using key information of the UE;

The sending unit is further configured to: before the determining unit determines that the UE is within the coverage of the first base station, send a request message to the second MTC GW according to the identifier of the second MTC GW; the request message includes The UE identifier, the request message is used to request to search for the key information of the UE corresponding to the UE identifier on the second MTC GW;

The receiving unit is further configured to receive key information of the UE that is sent by the second MTC GW;

The MTC GW further includes: a check unit,

The check unit is configured to perform integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determine that the UE is a legal UE.

Or the second uplink data further includes: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station, where the MAC is used to determine, by the first base station Whether the UE is a legal UE;

The receiving unit is configured to receive, by the first base station, first uplink data that is sent according to the identifier of the MTC GW after confirming that the UE is a valid UE; the identifier of the MTC GW is: the first base station Obtained from the second base station.

Or the second uplink data further includes: an identifier of the second base station and a MAC; the MAC is used to enable the first base station to determine whether the UE is a legal UE,

The receiving unit is specifically configured to receive, by the first base station, first uplink data that is sent by the first base station to the MTC GW after confirming that the UE is a legal UE.

In this way, the verification of the legitimacy of the UE by the MTC GW or the first base station ensures the security of subsequent data transmission.

It should be noted that the receiving unit in the third aspect may be a receiver of the MTC GW, and the sending unit may be a transmitter of the MTC GW; in addition, the receiving unit and the sending unit may also be integrated to form a transceiver of the MTC GW. The determining unit and the checking unit may be separately set up processors, or may be integrated in one processor of the MTC GW, or may be stored in the memory of the MTC GW in the form of program code, by a certain MTC GW. A processor calls and executes the functions of the above determining unit and the checking unit. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.

In a fourth aspect, the embodiment of the present invention further provides a base station, where the base station may include:

a sending unit, configured to send first uplink data to the first device type communication gateway MTC GW, where the first uplink data is used by the first MTC GW to determine the UE according to the UE identifier in the first uplink data The first uplink data includes: the UE identifier; the UE identifier is used to identify the UE; and the UE does not establish a radio resource control RRC connection with the base station;

a receiving unit, configured to receive downlink data of the UE sent by the first MTC GW;

The sending unit is further configured to send a first paging paging message to the UE, where the first paging message includes downlink data of the UE.

The first uplink data may be generated by the base station according to the second uplink data that is sent by the UE by the base station, where the second uplink data includes the identifier of the UE, and may be moved by the UE to the coverage of the base station (eg, The data that is actively reported to the base station when the coverage of the second base station is moved to the coverage of the first base station; and may be reported to the base station after the UE is successfully paged by the base station, specifically, in the fourth aspect In an implementation manner, the receiving unit is further configured to: before the transmitting unit sends the first uplink data to the first MTC GW, receive a second paging message sent by the first MTC GW; The paging message includes: an identifier of the UE;

The sending unit is further configured to page the UE by using a third paging message within the coverage of the first base station;

The receiving unit is further configured to receive second uplink data returned by the UE, where the second uplink data is used to notify the first base station that the UE is paged, and the second uplink data includes: Describe the UE identifier and the identifier of the first MTC GW;

The sending unit is specifically configured to send the first uplink data to the first MTC GW according to the identifier of the first MTC GW.

The second uplink data is data that the UE actively reports to the base station, when the UE moves to the coverage of the base station (eg, the coverage from the coverage of the second base station to the coverage of the first base station). If the UE is an illegal user, it will cause unnecessary troubles for subsequent data transmission. Therefore, in order to ensure the security of subsequent data transmission, it is necessary to verify the legitimacy of the UE through the base station or the first MTC GW.

Therefore, in a further implementation manner of the fourth aspect, when the second uplink data is data that is actively reported when the UE moves to the range of the first base station, the receiving unit, And receiving, by the sending unit, the second uplink data sent by the UE, before sending the first uplink data to the first machine type communication gateway MTC GW;

The second uplink data is used to notify the first base station that the UE moves from the coverage of the second base station to the coverage of the first base station, and the second uplink data includes: an identifier of the UE.

The sending unit is configured to send the first uplink data to the first MTC GW according to the first MTC GW identifier, where the first uplink data is used by the first MTC GW to determine according to the MAC The UE is a legal UE.

Or the second uplink data further includes: an identifier of the second MTC GW and the MAC; the first uplink data further includes: the identifier of the MAC and the second MTC GW, where the uplink data is used by the The first MTC GW obtains key information of the UE from the second MTC GW, and determines that the UE is a legal UE according to the key information of the UE and the MAC.

Or the second uplink data further includes: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station;

The sending unit is configured to: after the receiving unit receives the second uplink data sent by the UE, send a request message to the second base station according to the identifier of the second base station; the request message includes the An identifier of the UE, where the request message is used to request the second base station to query, according to the identifier of the UE, key information corresponding to the UE stored in the second base station;

The receiving unit is further configured to receive key information of the UE sent by the second base station;

The base station further includes: a verification unit,

Or the second uplink data further includes: an identifier of the second base station, and MAC;

The sending unit is further configured to: after the receiving unit receives the second uplink data sent by the UE, before sending the first uplink data to the first MTC GW, according to the identifier of the second base station, The second base station sends a request message and sends a notification message to the second base station, and the second base station is notified to release the context information of the UE stored in the second base station; the request message includes an identifier of the UE, The request message is used to request the second base station to query, according to the identifier of the UE, key information corresponding to the UE stored in the second base station;

The base station further includes: a check unit;

In this way, the verification of the legitimacy of the UE by the first MTC GW or the base station ensures the security of subsequent data transmission.

In a fifth aspect, the embodiment of the present invention further provides a data transmission system, including the MTC GW provided by the third aspect, the base station provided by the fourth aspect, and the UE.

It should be noted that the receiving unit in the fourth aspect may be a receiver of the base station, and the sending unit may be a transmitter of the base station; in addition, the receiving unit and the sending unit may also be integrated to form a transceiver of the base station. The determining unit may be a separately set processor, or may be integrated in a processor of the base station, or may be stored in a memory of the base station in the form of program code, and is called by one of the base stations and executes the above. Determine the function of the unit and the check unit. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.

As can be seen from the above, the embodiment of the present invention provides a data transmission method, device, and system. The first MTC GW receives the first uplink data that is sent by the first base station and includes the UE identifier, and is based on the UE identifier in the first uplink data. Determining that the UE is in the first The downlink data of the received UE is sent to the first base station, and the first base station sends the downlink data of the UE in the first paging paging message to send the paging to the UE. In this way, the uplink data carried by the base station and carrying the UE identifier can be used to make the MTC GW accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the base station. The downlink data is carried by the base station to the UE by using the paging message, so that the paging message sent by the multiple base stations to carry the downlink data is initiated to the paging station in the existing mechanism. The problem of a lot of resource overhead.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a flow chart of a data transmission method;

2 is a flow chart of a data transmission method;

FIG. 3 is a schematic diagram of a network architecture according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an MTC GW 10 and a base station 20 according to an embodiment of the present invention;

FIG. 5 is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 5a is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 5b is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 5c is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 6 is a structural diagram of an MTC GW 30 according to an embodiment of the present invention;

FIG. 7 is a structural diagram of a base station 40 according to an embodiment of the present invention;

FIG. 8 is a structural diagram of a data transmission system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 3 is a schematic diagram of a network architecture according to an embodiment of the present invention. As shown in FIG. 3, the network architecture may include: a UE, a base station 20, and an MTC GW10, where a public tunnel (such as a GTP tunnel) is established between the MTC GW10 and the base station 20. The UE is in an idle state, and no Radio Resource Control (RRC) is established with the base station 20.

In the network architecture shown in FIG. 3, the UE can move between base stations 20; since the UE is in an idle state. Therefore, in the prior art, because the UE is in an idle state, the MTC GW 10 cannot learn the location information of the UE, so that when the MTC GW 10 receives the downlink data of the UE, the downlink data is sent to all the base stations connected to the MTC GW 10. 20. The base station 20 transmits downlink data to the UE through a paging message, which increases resource overhead. In the present invention, the UE may report the identity of the UE to the MTC GW 10 through the base station 20 in the cell in which the UE is located, so that the MTC GW 10 determines that the UE is in the coverage of the base station 20, and further can downlink the received UE. The data is delivered to the UE only through the base station 20, and the resource overhead of other base stations 20 connected to the MTC GW 10 is avoided.

Optionally, in order to implement the data transmission method provided by the present invention, as shown in FIG. 4, the MTC GW 10 may include: a transceiver 1011, a processor 1012, a memory 1013, and at least one communication bus 1014, for implementing these devices. Connecting and communicating with each other; the base station 20 may include: a transceiver 2011, a processor 2012, a memory 2013, and at least one communication bus 2014 for implementing connections and mutual communication between the devices;

The transceiver 1011 and the transceiver 2011 can be implemented by an antenna, and can be used for data interaction with an external network element. For example, the transceiver 1011 of the MTC GW10 can send and receive data packets with the base station 20; Device 2011 can send and receive with UE or a packet between MTC GW10;

The processor 1012 and the processor 2012 may be a central processing unit (CPU), may be an Application Specific Integrated Circuit (ASIC), or be configured to implement an embodiment of the present invention. One or more integrated circuits. For example: one or more digital singal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The memory 1013 and the memory 2013 may be a volatile memory such as a random-access memory (RAM) or a non-volatile memory. For example, a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); or a combination of the above types of memories.

The communication bus 1014 and the communication bus 2014 can be divided into an address bus, a data bus, a control bus, etc., and can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an extended industry standard. Architecture (Extended Industry Standard Architecture, EISA) bus, etc. For ease of representation, only one thick line is shown in Figure 4, but it does not mean that there is only one bus or one type of bus.

Specifically, the processor 2012 generates the first uplink data, and the first uplink data is sent by the transceiver 2011 to the MTC GW10 transceiver 1011; the first uplink data includes the user equipment UE identifier; the UE identifier is used to identify the UE;

The processor 1012 obtains the UE identifier from the first data received by the transceiver 1011, and identifies that the UE is in the coverage of the base station 20 that sends the first uplink data according to the UE identifier.

When the transceiver 1011 of the MTC GW10 receives the downlink data of the UE sent by the upper layer serving gateway, the processor 1012 transmits the downlink data of the UE to the transceiver 1012 of the base station 20 through the transceiver 1011;

The processor 1012 carries the downlink data received by the transceiver 1012 in the paging cancellation The paging is sent to the UE, so that the UE obtains its own downlink data from the paging message, and completes the current data transmission.

In this way, the uplink data carried by the base station and carrying the UE identifier can be used to make the MTC GW accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the corresponding The base station carries the downlink data to the UE by using the paging message, so that the paging message sent by the multiple base stations to carry the downlink data is sent to the UE in the case that the specific location of the UE is not determined in the existing mechanism. The problem of a large amount of resource overhead.

The first uplink data may be generated by the base station 20 according to the second uplink data that is sent by the UE by the base station 20, where the second uplink data includes the UE identifier, which may be the coverage of the UE moving to the base station 20. The data that is reported to the base station 20 by the internal time is also reported to the base station 20 after the UE is successfully paged by the base station 20.

In addition, when the UE moves to the coverage of the base station 20, the second uplink data is data that the UE actively reports to the base station 20. If the UE is an illegal user, the subsequent data transmission may be unnecessary. In order to ensure the security of the subsequent data transmission, in the embodiment of the present invention, the base station 20 or the MTC GW 10 is required to verify the validity of the UE and ensure the security of subsequent data transmission. The specific implementation is as follows:

The second uplink data may further include: an identifier of the MTC GW 10 and a message authentication code (MAC); the first uplink data further includes: the MAC;

The processor 1012 of the MTC GW 10 after the transceiver 1011 receives the first uplink data sent by the transceiver 2011 of the base station 20 according to the identifier of the MTC GW 10, before the UE is within the coverage of the base station 20, at the MTC Searching, on the memory 1013 of the GW 20, the key information of the UE corresponding to the UE identifier, and performing integrity verification on the MAC by using the key information of the UE, and if the integrity check is successful, determining the The UE is a legal UE.

Alternatively, the second uplink data may further include: an identifier of the MTC GW 10 and a MAC; the first uplink data may further include: the MAC and the second MTC GW Identification

The transceiver 1011 of the MTC GW 10 sends a request message to the second MTC GW according to the identifier of the second MTC GW before the processor 1012 determines that the UE is within the coverage of the base station 20; requesting the second MTC GW to search and The UE identifies key information of the corresponding UE, and receives key information of the UE returned by the second MTC GW;

The processor 1012 receives the key information of the UE sent by the second MTC GW at the transceiver 1011, performs integrity check on the MAC by using the key information of the UE, and determines if the integrity check succeeds. The UE is a legal UE.

Or the second uplink data may further include: an identifier of the second base station and a MAC; the first uplink data may further include: an identifier of the second base station;

After receiving the second uplink data sent by the UE, the transceiver 2011 sends a request message to the second base station according to the identifier of the second base station, and requests the second base station to query the confidentiality corresponding to the UE according to the identifier of the UE. Key information, and receiving key information of the UE returned by the second base station and an identifier of the MTC GW 10;

After receiving the key information of the UE sent by the second base station, the processor 2012 performs integrity verification on the MAC by using the key information of the UE, and if the integrity check succeeds, determining The UE is a legal UE;

After receiving the identifier of the MTC GW 10, the transceiver 2011 sends the first uplink data to the MTC GW 10 according to the identifier of the MTC GW 10.

Alternatively, the second uplink data may further include: an identifier of the second base station and a MAC;

After receiving the second uplink data sent by the UE, the transceiver 2011 sends a request message to the second base station according to the identifier of the second base station before sending the first uplink data to the MTC GW10. And sending a notification message to the second base station, informing the second base station to release the context information of the UE stored in the second base station, requesting the second base station to query the second base according to the identifier of the UE Key information corresponding to the UE stored in the base station; and receiving key information of the UE sent by the second base station;

After receiving the key information of the UE, the processor 2012 performs integrity verification on the MAC by using key information of the UE, and if the integrity check succeeds, determining the location The UE is a legal UE.

In this way, the verification of the legitimacy of the UE by the MTC GW10 or the base station ensures the security of subsequent data transmission.

For ease of description, the following embodiment 1 shows and describes in detail the process of the data transmission method provided by the present invention, wherein the steps shown may also be performed in a computer system of a set of executable instructions. Moreover, although logical sequences are shown in the figures, in some cases the steps shown or described may be performed in a different order than the ones described herein.

Embodiment 1

FIG. 5 is a flowchart of a data transmission method according to an embodiment of the present invention. The MTC GW 10 and the base station 20 shown in FIG. 3 are mutually executed, and are used to send downlink data to any UE in the network architecture shown in FIG. 3; As shown in FIG. 5, the method may include the following steps:

S101: The first base station sends first uplink data to the first MTC GW; the first uplink data includes a UE identifier, and the UE identifier is used to identify the UE.

The first base station is any base station in the network architecture shown in FIG. 3. The first MTC GW is an MTC GW that establishes a public tunnel connection with the first base station, and the UE is in an idle state, and is not in the idle state. Establish an RRC connection.

It should be noted that, in the embodiment of the present invention, a link from a UE to a base station, a base station, and an MTC GW may be referred to as an uplink, and a link from an MTC GW to a base station and a base station to a UE may be referred to as a downlink, and thus The data sent on the base station to the MTC GW link is the uplink data.

Optionally, in order to improve the utilization of the data transmission resource, the first uplink data may be packet data with a longer period and a smaller data size.

S102: The first MTC GW determines, according to the UE identifier in the first uplink data, that the UE is in a coverage range of the first base station.

Optionally, the first uplink data may further include an identifier of the first base station, where the first The identifier of the base station is used to identify the first base station. After the first MTC GW receives the uplink data sent by the first base station, the first MTC GW may determine, according to the UE identifier and the first base station identifier carried in the uplink data, that the UE is in the Within the coverage of the first base station.

Or the first base station directly sends the first uplink data carrying only the UE identifier to the first MTC GW by using a public tunnel established between the first base station and the first MTC GW. Since the first MTC GW establishes a public tunnel with a base station, once the first MTC GW receives the first uplink data from the public tunnel, it knows that the first uplink data is sent by the first base station, and then passes The UE identifier carried by the uplink data determines the UE, and knows that the UE is within the coverage of the first base station.

S103: The first MTC GW sends downlink data of the UE to the first base station.

Optionally, the first MTC GW sends the downlink data of the UE to the first base station by using a public tunnel.

S104: The first base station sends a first paging message to the UE, where the first paging message includes downlink data of the UE.

Since the UE is within the coverage of the first base station, the first base station can successfully page to the UE. At this time, the UE may acquire downlink data in the first paging message after being successfully paged.

The first uplink data in the step S101 may be generated by the first base station according to the second uplink data, that is, before the step S101, the first base station further needs to receive the second uplink data, where the second uplink data includes the Referring to the UE identifier, the second uplink data may be sent by the UE to the first base station in any of the following cases:

1. When the UE finds that it moves from the coverage of other base stations to the range of the first base station (eg, moves from the coverage of the second base station to the coverage of the first base station) The UE actively reports the second uplink data to the first base station.

Optionally, the UE may obtain the physical cell identifier (PCI) information of the cell by using a system message or by reading the synchronization signal to find that it moves from the coverage of the other base station to the range of the first base station.

2. After the UE is successfully paged by the first base station, the UE reports the second uplink data to the first base station.

The method may further include: before the UE is successfully paged by the first base station, the method may further include:

The first MTC GW receives the downlink data of the UE, and sends a second paging message to all the base stations connected to the first MTC GW, where the second paging message includes the UE identifier;

After receiving the second paging message, each base station of each of the base stations pages the UE by using a third paging message within its coverage; the all base stations include the first base station.

Because the UE is within the coverage of the first base station, only the third paging message sent by the first base station can successfully page to the UE.

Optionally, in the second case, the second uplink data may further include: an identifier of the first MTC GW, where the identifier of the first MTC GW is used by the first base station according to the identifier of the first MTC GW. The first MTC GW sends the first uplink data; the identifier of the first MTC GW is used to identify the first MTC GW.

In the first case, when the UE moves to the coverage of the first base station, the uplink data is actively reported to the first base station. If the UE is an illegal user, the subsequent data transmission is unnecessary. trouble. Therefore, in order to ensure the security of the subsequent data transmission, in the embodiment of the present invention, if the second uplink data reported by the UE during the mobile process is received, the legality of the UE needs to be verified by the first base station or the first MTC GW. After the UE is determined to be a legal UE, the base station where the UE is located is determined to perform data transmission. Specifically, the legality of the UE may be determined by using the method in any of the following FIG. 5a to FIG. 5d:

The method shown in FIG. 5a may include the following steps:

S101a: The UE reports second uplink data to the first base station, where the second uplink data is sent. The identifier includes: the identifier of the UE, the identifier of the first MTC GW, and a message authentication code (MAC).

S102a: The first base station sends first uplink data to the first MTC GW according to the identifier of the first MTC GW, where the first uplink data includes: the UE identifier, the MAC.

S103a: The first MTC GW searches for key information of the UE corresponding to the UE identifier, performs integrity verification on the MAC by using the key information of the UE, and if the integrity check succeeds, determines the location. The UE is a legal UE.

The MAC is mainly used to verify the integrity of the message and prevent the message from being tampered with by the attacker. When transmitting a message to the other party, the sender may place the message authentication code behind the message and send it to the receiver along with the message. After receiving the message, the receiver may receive the received message, key information, and other parameters. As a parameter, a new message verification code is derived by Key Derivatioin Function (KDF), and the new message verification code is compared with the message verification code in the message. If the two are consistent, the message is not Tampering, the integrity check is successful. If the two are inconsistent, the message has not been tampered with and the integrity check failed.

For example, after the first MTC GW finds the key information, the first uplink data and the key information may be used as input parameters, and a new MAC is derived through the KDF function, and the new MAC is compared with the MAC in the first uplink data. If the two are consistent, the message has not been tampered with, and the integrity check succeeds. If the two are inconsistent, the message has not been tampered with, and the integrity check fails.

The method shown in Figure 5b can include the following steps:

S101b: The UE reports the second uplink data to the first base station, where the second uplink data includes: the identifier of the UE, the identifier of the second base station, and the MAC.

S102b: The first base station sends a request message to the second base station according to the identifier of the second base station; the request message includes an identifier of the UE, and the request message is used to request the second base station according to the UE. The identifier is used to query key information corresponding to the UE stored in the second base station.

S103b: The first base station receives the key that is sent by the second base station and includes the UE. The message and the response message of the identity of the first MTC GW.

S104b: The first base station performs integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determining that the UE is a legal UE.

Next, the first base station may send the first uplink packet data to the first MTC GW according to the identifier of the first MTC GW received in the step S103b, where the first uplink data may include: the UE identifier, the Determining the identity of the first base station such that the first MTC GW determines that the UE is within the coverage of the first base station.

The method shown in Figure 5c can include the following steps:

S101c: The UE reports the second uplink data to the first base station, where the second uplink data includes: the identifier of the UE, the identifier of the second MTC GW, and the MAC.

S102c: The first base station sends the first uplink data to the first MTC GW, where the first uplink data includes: the identifier of the UE, the identifier of the second MTC GW, and the MAC.

The first MTC GW is an MTC GW that can currently provide services for the UE, and the second MTC GW is an MTC GW that provides services for the UE before the UE moves.

S103c: The first MTC GW sends a request message to the second MTC GW according to the identifier of the second MTC GW; the request message includes the UE identifier, and the request message is used to request the second MTC GW. The key information of the UE corresponding to the UE identifier is searched for.

S104c: The first MTC GW receives the key information of the UE that is sent by the second MTC GW.

S105c: The first MTC GW performs integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determining that the UE is a legal UE.

The method shown in Figure 5d can include the following steps:

S101d: The UE reports the second uplink data to the first base station, where the second uplink data includes: the identifier of the UE, the identifier of the second base station, and the MAC.

S102d: The first base station sends a request message to the second base station according to the identifier of the second base station; the request message includes an identifier of the UE, and the request message is used to request the second base station according to the UE. Identification of the second base station stored in the query Key information corresponding to the UE.

S103d: The first base station receives the key information of the UE that is sent by the second base station.

S104d: Perform integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determine that the UE is a legal UE.

The first base station may send the first uplink data to the first MTC GW, where the first uplink data may include: the UE identifier, and the first MTC GW determines, according to the UE identifier, that the UE is at the first base station. Coverage.

It should be noted that, in the method shown in FIG. 5c and FIG. 5d, the MTC GW connected to the first base station changes from the second MTC GW to the first MTC GW. Therefore, in order to receive the downlink data of the UE sent by the upper gateway, The first MTC GW also needs to notify the upper layer device (eg, PGW (PDN GateWay)) to update the data channel, and switch the channel between the PGW and the second MTC GW to be between the PGW and the first MTC GW. In the method shown in FIG. 5d, the first base station notifies the second base station to release the corresponding UE context information according to the identifier information of the second base station, and the second base station further informs the second MTC GW to perform the corresponding UE. The release of context information.

As can be seen from the above, the embodiment of the present invention provides a data transmission method, where the first MTC GW receives the first uplink data that is sent by the first base station and includes the identifier of the UE, and determines, according to the UE identifier in the first uplink data, The UE is in the coverage of the first base station, and sends the downlink data of the received UE to the first base station, where the first base station sends the downlink data of the UE to the UE in the first paging paging message. Paging. In this way, the uplink data carried by the base station and carrying the UE identifier can be used to make the MTC GW accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the base station. The downlink data is carried by the base station to the UE by using the paging message, so that the paging message sent by the multiple base stations to carry the downlink data is initiated to the paging station in the existing mechanism. The problem of a lot of resource overhead.

Embodiment 2

FIG. 6 is a structural diagram of a machine type communication gateway MTC GW10 according to an embodiment of the present invention, for performing the method described in Embodiment 1, as shown in FIG. GW can include:

The receiving unit 201 is configured to receive first uplink data sent by the first base station, where the first uplink data includes a user equipment UE identifier, and the UE identifier is used to identify the UE.

The determining unit 202 is configured to determine, according to the UE identifier in the first uplink data that is received by the receiving unit, that the UE is in the coverage of the first base station, where the UE and the first base station are not Establish a radio resource control RRC connection.

The sending unit 203 is configured to: after the determining unit determines that the UE is in the coverage of the first base station, trigger the first base station to send the downlink data by sending the downlink data of the UE to the first base station. The UE sends a first paging paging message, where the first paging message includes downlink data of the UE.

The first uplink data may be generated by the first base station according to the second uplink data that is sent by the UE by the first base station, where the second uplink data includes the UE identifier, and may be moved to the first base station by the UE. Data that is actively reported to the first base station when the UE is successfully paged by the first base station, and may be reported to the UE after being successfully paged by the first base station. The first base station is specifically implemented as follows:

The receiving unit 201 is further configured to: before receiving the first uplink data sent by the first base station, receive downlink data of the UE sent by the serving gateway;

The sending unit 203 is further configured to send, to all base stations connected to the MTC GW, a second paging message, where the second paging message includes the UE identifier, and each of the base stations receives After the second paging message, sending, in its coverage, a third paging message to the UE corresponding to the UE identifier; the all base stations include the first base station;

The receiving unit 201 is specifically configured to receive, by the first base station, the first uplink data that is sent by the first base station to the MTC GW according to the identifier of the MTC GW;

The second uplink data is data that the UE actively reports to the first base station when the UE moves to the coverage of the first base station. If the UE is an illegal user, the subsequent data transmission is unnecessary. Therefore, in order to ensure the security of the subsequent data transmission, the validity of the UE needs to be verified by the first base station or the MTC GW. After the UE is determined to be a legitimate UE, data transmission is performed, and the specific implementation is as follows:

The second uplink data further includes: an identifier of the MTC GW and a message authentication code MAC; the first uplink data further includes: the MAC;

The receiving unit 201 is specifically configured to receive first uplink data that is sent by the first base station according to the MTC GW identifier.

The MTC GW further includes a check unit 204,

The checking unit 204 is configured to search, on the MTC GW, key information of the UE corresponding to the UE identifier, before the determining unit 202 determines that the UE is within the coverage of the first base station;

Performing an integrity check on the MAC by using key information of the UE;

The sending unit 203 is further configured to: before the determining unit 202 determines that the UE is within the coverage of the first base station, send a request message to the second MTC GW according to the identifier of the second MTC GW; the request The message includes the UE identifier, where the request message is used to request to search for the key information of the UE corresponding to the UE identifier on the second MTC GW;

The receiving unit 201 is further configured to receive key information of the UE that is sent by the second MTC GW;

The MTC GW further includes: a check unit 204,

The checking unit 204 is configured to perform integrity check on the MAC by using key information of the UE, and determine that the UE is a legal UE.

The receiving unit 201 is configured to receive, by the first base station, first uplink data that is sent according to the identifier of the MTC GW after the first base station is confirmed to be a valid UE; the identifier of the MTC GW is: the first The base station obtains from the second base station.

The receiving unit 201 is specifically configured to receive, by the first base station, first uplink data that is sent by the first base station to the MTC GW after confirming that the UE is a legal UE.

It should be noted that the receiving unit and the sending unit in the MTC GW shown in FIG. 6 of the present invention may be the transceiver 1011 in the MTC GW 10 shown in FIG. 4; the determining unit and the verifying unit may be separate processors, and It can be implemented in one processor of the MTC GW. In addition, it can also be stored in the memory of the MTC GW in the form of program code, and the function of the above data transmission is called by one processor of the MTC GW. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.

As can be seen from the above, the embodiment of the present invention provides an MTC GW, which receives the first uplink data that is sent by the first base station and includes the UE identifier, and determines, according to the UE identifier in the first uplink data, that the UE is in the first Within the coverage of a base station, it will receive The downlink data of the UE is sent to the first base station, and the first base station includes the downlink data of the UE in the first paging paging message to send a page to the UE. In this way, the uplink data carried by the base station and carrying the UE identifier can be used to make the MTC GW accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the base station. The downlink data is carried by the base station to the UE by using the paging message, so that the paging message sent by the multiple base stations to carry the downlink data is sent to the UE in the case that the specific location of the UE is not determined in the existing mechanism. The problem of a lot of resource overhead.

Embodiment 3

FIG. 7 is a structural diagram of a base station 40 according to an embodiment of the present invention. As shown in FIG. 7, the base station 40 may include:

The sending unit 301 is configured to send the first uplink data to the first device type communication gateway MTC GW, where the first uplink data is used by the first MTC GW to determine, according to the UE identifier in the first uplink data, The UE is in the coverage of the first base station, where the first uplink data includes: the UE identifier; the UE identifier is used to identify the UE; and the UE does not establish a radio resource control RRC connection with the base station. .

The receiving unit 302 is configured to receive downlink data of the UE sent by the first MTC GW.

The sending unit 301 is further configured to send a first paging paging message to the UE, where the first paging message includes downlink data of the UE.

In this way, the first uplink data may be sent to the first device type communication gateway MTC GW, so that the MTC GW can accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly correct the downlink data of the UE. Routed to the corresponding base station, the base station carries the downlink data to the UE by using a paging message, thereby avoiding the paging message of the downlink data carried by multiple base stations in the existing mechanism without determining the specific location of the UE. The problem that the UE sends a large amount of resource overhead caused by paging.

The first uplink data may be generated by the base station according to the second uplink data that is sent by the base station by the base station, where the second uplink data includes the UE identifier. The data that is actively reported to the base station when the UE moves to the coverage of the base station (eg, when moving from the coverage of the second base station to the coverage of the first base station); and may also be after the UE is successfully paged by the base station Reported to the base station, the specific implementation is as follows:

The receiving unit 302 is further configured to: before the transmitting unit 301 sends the first uplink data to the first MTC GW, receive the second paging message sent by the first MTC GW; the second paging message includes: Said UE identity;

The sending unit 301 is further configured to send a third paging message to the UE corresponding to the UE identifier in the coverage of the first base station;

The receiving unit 302 is further configured to receive second uplink data returned by the UE, where the second uplink data is used to notify the base station that the UE is paged, and the second uplink data includes: a UE identifier and an identifier of the first MTC GW;

The sending unit 301 is specifically configured to send the first uplink data to the first MTC GW according to the identifier of the first MTC GW.

The second uplink data is the data that the UE actively reports to the base station, when the UE moves to the coverage of the certain base station (eg, the coverage from the coverage of the second base station to the coverage of the first base station). If the UE is an illegal user, it will bring unnecessary trouble to the subsequent data transmission. Therefore, in order to ensure the security of the subsequent data transmission, the base station or the first MTC GW is required to verify the validity of the UE. The implementation is as follows:

The second uplink data further includes: an identifier of the second MTC GW and a MAC; the first uplink data further includes: the MAC and an identifier of the second MTC GW;

The sending unit 301 is specifically configured to send the first uplink data to the first MTC GW according to the first MTC GW identifier, where the first uplink data is used by the first MTC GW according to the MAC Determining that the UE is a legal UE.

Or the second uplink data further includes: an identifier of the second MTC GW and the MAC; the first uplink data further includes: the identifier of the MAC and the second MTC GW, and the identifier of the second MTC GW Obtaining, by the first MTC GW, key information of the UE from the second MTC GW, and according to the key of the UE The information and the MAC determine that the UE is a legitimate UE.

The sending unit 301 is specifically configured to: after the receiving unit 302 receives the second uplink data sent by the UE, send a request message to the second base station according to the identifier of the second base station; the request message includes The identifier of the UE, the request message is used to request the second base station to query, according to the identifier of the UE, key information corresponding to the UE stored in the second base station;

The receiving unit 302 is further configured to receive, by the second base station, a response message that includes an identifier of the first MTC GW and key information of the UE;

The base station further includes: a check unit 303,

The checking unit 303 is configured to perform integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determine that the UE is a legal UE;

Or the second uplink data further includes: an identifier of the second base station and a MAC;

The sending unit 301 is further configured to: after the receiving unit 302 receives the second uplink data sent by the UE, before sending the first uplink data to the first MTC GW, according to the identifier of the second base station Sending, by the second base station, a request message, and sending a notification message to the second base station, to notify the second base station to release context information of the UE stored in the second base station; the request message includes the UE And the requesting message is used to request the second base station to query, according to the identifier of the UE, key information corresponding to the UE stored in the second base station;

The receiving unit 302 is further configured to receive key information of the UE sent by the second base station;

The base station further includes: a check unit 303;

The checking unit 303 is configured to use the key information of the UE to enter the MAC address. A line integrity check, if the integrity check is successful, determining that the UE is a legitimate UE.

It should be noted that the receiving unit 302 and the sending unit 301 in the base station shown in FIG. 7 of the present invention may be the transceiver 2011 in the base station 10 shown in FIG. 4; the checking unit 303 may be a separately set processor, or may be The integration is implemented in a processor of the base station. In addition, it may be stored in the memory of the base station in the form of program code, and the function of the above data transmission is invoked and executed by a certain processor of the base station. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.

As can be seen from the above, the embodiment of the present invention provides a base station, where the first uplink data including the UE identifier is sent to the first MTC GW, so that the first MTC GW determines the UE according to the UE identifier in the first uplink data. The downlink data of the received UE is sent to the base station, and the base station includes the downlink data of the UE in the first paging paging message to initiate paging to the UE. In this way, the uplink data carried by the base station and carrying the UE identifier can be used to make the MTC GW accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the base station. The downlink data is carried by the base station to the UE by using the paging message, so that the paging message sent by the multiple base stations to carry the downlink data is initiated to the paging station in the existing mechanism. The problem of a lot of resource overhead.

Embodiment 4

FIG. 8 is a structural diagram of a data transmission system according to an embodiment of the present invention. As shown in FIG. 8, the data transmission system may include: an MTC GW 30, a base station 40, and a UE.

The functions of the MTC GW 30 and the MTC GW 30 described in the second embodiment are the same, and the functions of the base station 40 and the base station 40 described in the third embodiment are the same, and will not be further described herein.

As can be seen from the above, an embodiment of the present invention provides a data transmission system, a first MTC GW. Receiving, by the base station, the first uplink data that includes the identifier of the UE, and determining, according to the UE identifier in the first uplink data, that the UE is in the coverage of the base station, and sending the downlink data of the received UE to the first An eNB base station, the base station includes the downlink data of the UE in a first paging paging message to initiate paging to the UE. In this way, the uplink data carried by the base station and carrying the UE identifier can be used to make the MTC GW accurately know that the UE is in the coverage of the base station. When there is downlink data of the UE, the MTC GW can correctly route the downlink data of the UE to the base station. The downlink data is carried by the base station to the UE by using the paging message, so that the paging message sent by the multiple base stations to carry the downlink data is initiated to the paging station in the existing mechanism. The problem of a lot of resource overhead.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-mentioned unit and system can refer to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above integrated unit implemented in the form of a software functional unit can be stored in a Computers can be read from the storage medium. The software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

A person of ordinary skill in the art may understand that all or part of the steps of the foregoing embodiments may be completed by a program to instruct related hardware (for example, a processor), and the program may be stored in a computer readable storage medium. The storage medium may include a read only memory, a random access memory, a magnetic disk or an optical disk, or the like.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A data transmission method is applied to a first machine type communication gateway MTC GW; and the method includes:

Receiving, by the first base station, the first uplink data, where the first uplink data includes a user equipment UE identifier;

Determining, according to the identifier of the UE, that the UE is in a coverage of the first base station, where the UE does not establish a radio resource control RRC connection with the first base station;

The first base station is configured to send a first paging paging message to the UE by sending the downlink data of the UE to the first base station, where the first paging message includes downlink data of the UE.
The data transmission method according to claim 1, wherein before receiving the first uplink data sent by the first base station, the method further includes:

Receiving downlink data of the UE sent by the serving gateway;

Transmitting, to the base station that is connected to the first MTC GW, a second Paging message, where the second Paging message includes the UE identifier, where the second paging message is used for each of the all base stations After receiving the second paging message, each base station pages the UE by using a third paging message within its coverage; the all base stations include the first base station;

The receiving, by the first base station, the first uplink data includes:

Receiving, by the first base station, the first uplink data that is sent to the first MTC GW according to the identifier of the first MTC GW;

The first uplink data is generated by the first base station according to the received second uplink data sent by the UE, and the second uplink data is used to notify the first base station that the UE is paged to The second uplink data includes: the UE identifier and an identifier of the first MTC GW.
The data transmission method according to claim 1, wherein the first uplink data is generated by the first base station according to the received second uplink data sent by the UE; the second uplink data is used by Notifying the first base station that the UE moves from the coverage of the second base station to the coverage of the first base station; the second uplink data packet Including: the UE identifier.
The data transmission method according to claim 3, wherein the second uplink data further comprises: an identifier of the first MTC GW and a message authentication code MAC; the first uplink data further includes: the MAC; Receiving the first uplink data sent by the first base station includes:

Receiving, by the first base station, first uplink data that is sent according to the first MTC GW identifier;

And before determining that the UE is in the coverage of the first base station, according to the UE identifier in the first uplink data, the method further includes:

Searching, on the first MTC GW, key information of a UE corresponding to the UE identifier;

Performing an integrity check on the MAC by using key information of the UE;

If the integrity check is successful, it is determined that the UE is a legitimate UE.
The data transmission method according to claim 3, wherein the second uplink data further includes: an identifier of the second MTC GW and a MAC; the first uplink data further includes: the MAC and the second The identity of the MTC GW;

And before determining that the UE is in the coverage of the first base station, according to the UE identifier in the first uplink data, the method further includes:

Sending a request message to the second MTC GW according to the identifier of the second MTC GW; the request message includes the UE identifier, and the request message is used to request to search for the UE on the second MTC GW Identifying key information of the corresponding UE;

Receiving key information of the UE sent by the second MTC GW;

Performing an integrity check on the MAC by using key information of the UE;

If the integrity check is successful, it is determined that the UE is a legitimate UE.
The data transmission method according to claim 3, wherein the second uplink data further comprises: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station The MAC is configured to enable the first base station to determine whether the UE is a valid UE, and the receiving the first uplink data sent by the first base station includes:

Receiving, by the first base station, first uplink data that is sent according to the identifier of the first MTC GW after confirming that the UE is a legal UE; the identifier of the first MTC GW is: the first base station from the first Obtained at the second base station.
The data transmission method according to claim 3, wherein the second uplink data further comprises: an identifier of the second base station and a MAC; the MAC is used to enable the first base station to determine whether the UE is The first uplink data sent by the first base station is:

Receiving, by the first base station, first uplink data that is sent to the first MTC GW after confirming that the UE is a legal UE.
A data transmission method is applied to a first base station; and the method includes:

Sending the first uplink data to the first machine type communication gateway MTC GW, where the first uplink data is used by the first MTC GW to determine, according to the user equipment UE identifier in the first uplink data, that the UE is in the first The coverage of the base station, where the first uplink data includes: the UE identifier; the UE and the first base station do not establish a radio resource control RRC connection;

Receiving downlink data of the UE sent by the first MTC GW;

Sending a first paging paging message to the UE, where the first paging message includes downlink data of the UE.
The data transmission method according to claim 8, wherein the method further comprises: before transmitting the first uplink data to the first machine type communication gateway MTC GW, the method further comprising:

Receiving a second paging message sent by the first MTC GW; the second paging message includes the UE identifier;

Paging the UE by using a third paging message within the coverage of the first base station;

Receiving, by the UE, the second uplink data that is returned by the UE; the second uplink data is used to notify the first base station that the UE is paged; and the second uplink data includes: the UE identifier and the first The identity of the MTC GW;

Sending the first uplink data packet to the first machine type communication gateway MTC GW include:

And transmitting first uplink data to the first MTC GW according to the identifier of the first MTC GW.
The data transmission method according to claim 8, wherein the method further comprises: before transmitting the first uplink data to the first machine type communication gateway MTC GW, the method further comprising:

Receiving, by the second uplink data, sent by the UE, where the second uplink data is used by the first base station to move the coverage of the UE from the coverage of the second base station to the coverage of the first base station; The two uplink data includes: the UE identifier.
The data transmission method according to claim 10, wherein the second uplink data further comprises: an identifier of the second MTC GW and a MAC; the first uplink data further includes: the MAC and the second The identifier of the MTC GW; the sending the first uplink data to the first machine type communication gateway MTC GW includes:

And sending, by the first MTC GW, the first uplink data to the first MTC GW, where the first uplink data is used by the first MTC GW to determine, according to the MAC, that the UE is a legal UE.
The data transmission method according to claim 10, wherein the second uplink data further comprises: an identifier of the second MTC GW and a MAC; the first uplink data further includes: the MAC and the second An identifier of the MTC GW, where the first uplink data is used by the first MTC GW to obtain key information of the UE from the second MTC GW, and is determined according to the key information of the UE and the MAC The UE is a legal UE.
The data transmission method according to claim 10, wherein the second uplink data further comprises: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station After receiving the second uplink data sent by the UE, before sending the first uplink data to the first MTC GW, the method further includes:

Sending a request message to the second base station according to the identifier of the second base station; the request message includes the UE identifier, and the request message is used to request the second base station to The UE identifier queries the key information corresponding to the UE stored in the second base station;

Receiving key information of the UE sent by the second base station;

Performing an integrity check on the MAC by using key information of the UE;

If the integrity check is successful, it is determined that the UE is a legitimate UE.
The data transmission method according to claim 10, wherein the second uplink data further comprises: an identifier of the second base station and a MAC; after receiving the second uplink data sent by the UE, Before the first MTC GW sends the first uplink data, the method further includes:

Sending a request message to the second base station according to the identifier of the second base station, and sending a notification message to the second base station, informing the second base station to release the context information of the UE stored in the second base station The request message includes the UE identifier, and the request message is used to request the second base station to query, according to the UE identifier, key information corresponding to the UE stored in the second base station;

Receiving key information of the UE sent by the second base station;

Performing an integrity check on the MAC by using key information of the UE;

If the integrity check is successful, it is determined that the UE is a legitimate UE.
A machine type communication gateway MTC GW, characterized in that the MTC GW comprises:

a receiving unit, configured to receive first uplink data sent by the first base station, where the first uplink data includes a user equipment UE identifier;

a determining unit, configured to determine, according to the UE identifier in the first uplink data that is received by the receiving unit, that the UE is in a coverage range of the first base station, where the UE is not established with the first base station Radio resource control RRC connection;

a sending unit, configured to: after the determining unit determines that the UE is in the coverage of the first base station, trigger the first base station to send to the UE by sending downlink data of the UE to the first base station Sending a first paging paging message, where the first paging message includes downlink data of the UE.
The MTC GW according to claim 15, wherein

The receiving unit is further configured to receive the first uplink data sent by the first base station base station Previously, receiving downlink data of the UE sent by the serving gateway;

The sending unit is further configured to send a second paging message to all base stations connected to the MTC GW, where the second paging message includes the UE identifier; and the second paging message is used by all the base stations After receiving the second paging message, each base station in each of the base stations pages the UE by using a third paging message within its coverage; the all base stations include the first base station;

The receiving unit is specifically configured to receive, by the first base station, the first uplink data that is sent by the first base station to the MTC GW according to the identifier of the MTC GW;

The first uplink data is generated by the first base station according to the received second uplink data sent by the UE, and the second uplink data is used to notify the first base station that the UE is paged to The second uplink data includes: the UE identifier and an identifier of the MTC GW.
The MTC GW according to claim 15, wherein the first uplink data is generated by the first base station according to the received second uplink data sent by the UE, and the second uplink data is used for notification. The first base station, the UE moves from the coverage of the second base station to the coverage of the first base station, and the second uplink data includes: the UE identifier.
The MTC GW according to claim 17, wherein the second uplink data further includes: an identifier of the MTC GW and a message authentication code MAC; the first uplink data further includes: the MAC;

The receiving unit is specifically configured to receive first uplink data that is sent by the first base station according to the MTC GW identifier;

The MTC GW further includes a check unit,

The checking unit is configured to search, on the MTC GW, key information of the UE corresponding to the UE identifier, before the determining unit determines that the UE is within the coverage of the first base station;

Performing an integrity check on the MAC by using key information of the UE;

If the integrity check is successful, it is determined that the UE is a legitimate UE.
The MTC GW according to claim 17, wherein said second The uplink data further includes: an identifier of the second MTC GW and the MAC; the first uplink data further includes: the identifier of the MAC and the second MTC GW;

The sending unit is further configured to: before the determining unit determines that the UE is within the coverage of the first base station, send a request message to the second MTC GW according to the identifier of the second MTC GW; the request message includes The UE identifier, the request message is used to request to search for the key information of the UE corresponding to the UE identifier on the second MTC GW;

The receiving unit is further configured to receive key information of the UE that is sent by the second MTC GW;

The MTC GW further includes: a check unit,

The check unit is configured to perform integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determine that the UE is a legal UE.
The MTC GW according to claim 17, wherein the second uplink data further includes: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station, The MAC is configured to enable the first base station to determine whether the UE is a legal UE;

The receiving unit is configured to receive, by the first base station, first uplink data that is sent according to the identifier of the MTC GW after confirming that the UE is a valid UE; the identifier of the MTC GW is: the first base station Obtained from the second base station.
The MTC GW according to claim 17, wherein the second uplink data further includes: an identifier of the second base station and a MAC; the MAC is configured to enable the first base station to determine whether the UE is Legal UE,

The receiving unit is specifically configured to receive, by the first base station, first uplink data that is sent by the first base station to the MTC GW after confirming that the UE is a legal UE.
A base station, the base station includes:

a sending unit, configured to send first uplink data to the first machine type communication gateway MTC GW, where the first uplink data is used by the first MTC GW to determine a UE according to the user equipment UE identifier in the first uplink data In the coverage of the first base station, where the first uplink data includes: the UE identifier; the UE and the The base station does not establish a radio resource control RRC connection;

a receiving unit, configured to receive downlink data of the UE sent by the first MTC GW;

The sending unit is further configured to send a first paging paging message to the UE, where the first paging message includes downlink data of the UE.
The base station according to claim 22, characterized in that

The receiving unit is further configured to: before the transmitting unit sends the first uplink data to the first MTC GW, receive a second paging message sent by the first MTC GW; the second paging message includes: the UE Identification

The sending unit is further configured to page the UE by using a third paging message within the coverage of the first base station;

The receiving unit is further configured to receive second uplink data returned by the UE; the second uplink data is used to notify the first base station that the UE is paged; and the second uplink data includes: Describe the UE identifier and the identifier of the first MTC GW;

The sending unit is specifically configured to send the first uplink data to the first MTC GW according to the identifier of the first MTC GW.
The base station according to claim 23, characterized in that

The receiving unit is further configured to: before the sending unit sends the first uplink data to the first machine type communication gateway MTC GW, receive the second uplink data sent by the UE;

The second uplink data is used to notify the first base station that the UE moves from the coverage of the second base station to the coverage of the first base station, and the second uplink data includes: the UE identifier.
The base station according to claim 24, wherein the second uplink data further includes: an identifier of the second MTC GW and a MAC; the first uplink data further includes: the MAC and the second MTC GW Identification

The sending unit is configured to send the first uplink data to the first MTC GW according to the first MTC GW identifier, where the first uplink data is used by the first MTC GW to determine according to the MAC The UE is a legal UE.
The base station according to claim 24, characterized in that

The second uplink data further includes: an identifier of the second MTC GW and the MAC; the first uplink data further includes: an identifier of the MAC and the second MTC GW, where the first uplink data is used by the The first MTC GW obtains key information of the UE from the second MTC GW, and determines that the UE is a legal UE according to the key information of the UE and the MAC.
The base station according to claim 24, wherein the second uplink data further includes: an identifier of the second base station and a MAC; the first uplink data further includes: an identifier of the second base station;

The sending unit is configured to: after the receiving unit receives the second uplink data sent by the UE, send a request message to the second base station according to the identifier of the second base station; the request message includes the a UE identifier, where the request message is used to request the second base station to query, according to the UE identifier, key information corresponding to the UE stored in the second base station;

The receiving unit is further configured to receive key information of the UE sent by the second base station;

The base station further includes: a verification unit,

The check unit is configured to perform integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determine that the UE is a legal UE.
The base station according to claim 24, wherein the second uplink data further comprises: an identifier of the second base station and a MAC;

The sending unit is further configured to: after the receiving unit receives the second uplink data sent by the UE, before sending the first uplink data to the first MTC GW, according to the identifier of the second base station, Transmitting, by the second base station, a request message, and sending a notification message to the second base station, to notify the second base station to release the context information of the UE stored in the second base station; the request message includes the UE identifier, where The request message is used to request the second base station to query, according to the UE identifier, key information corresponding to the UE stored in the second base station;

The receiving unit is further configured to receive key information of the UE sent by the second base station;

The base station further includes: a check unit;

The check unit is configured to perform integrity check on the MAC by using key information of the UE, and if the integrity check is successful, determine that the UE is a legal UE.