CN106993276B - Method and device for sending application layer data - Google Patents

Method and device for sending application layer data Download PDF

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Publication number
CN106993276B
CN106993276B CN201610040791.XA CN201610040791A CN106993276B CN 106993276 B CN106993276 B CN 106993276B CN 201610040791 A CN201610040791 A CN 201610040791A CN 106993276 B CN106993276 B CN 106993276B
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application layer
enodeb
packet
address
epc
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CN106993276A (en
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喻炜
严玉平
王宗茹
冯广华
甄景蕾
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Potevio Information Technology Co Ltd
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Potevio Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface

Abstract

The application discloses a method and a device for sending application layer data, wherein the method comprises the following steps: receiving an application layer data packet sent by a PDN, wherein the destination IP address of the received application layer data packet is the IP address of an SGI interface of the EPC or the IP address of an eNodeB managed by the EPC; and encapsulating a GTPU header on the application layer data packet and sending the GTPU header to a corresponding eNodeB, wherein the value of a TEID field in the GTPU header is set to a specific value, and the specific value is used for indicating the eNodeB to broadcast the application layer data packet to all online UEs managed by the eNodeB. The method and the device realize the broadcasting of the application layer data through less change on the basis of not changing the original data path, reduce the pressure of air interface resources, reduce the traffic data volume and the data transmission pressure of a PDN, a core network and an eNodeB, and have no influence on the existing scheduling mechanism.

Description

Method and device for sending application layer data
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for transmitting application layer data.
Background
The network architecture of an LTE230(Long Term Evolution) wireless communication system mainly includes: user Equipment (UE), an access network (E-UTRAN), and an Evolved Packet Core (EPC). Wherein, the UE is also called a terminal device, and has a unique identifier imsi (international Mobile Subscriber identity); the E-UTRAN consists of base stations (Evolved nodebs, enodebs) that perform signaling and user plane data interaction with UEs over an air interface, and the functions of the enodebs include receiving signaling and uplink data from the UEs, and sending signaling responses and downlink data to the UEs.
The LTE230 wireless communication service is generally initiated by a UE, after the UE is powered on, an attach procedure is first initiated to register with an EPC so as to request for a service, in the attach procedure, the EPC is responsible for establishing a user plane bearer for the UE and allocates an IP (internet protocol) address to the UE, and a PDN (Packet Data Network) of an industrial user corresponds to the UE by using an IP address identifier, thereby performing communication of application layer Data. Each UE may communicate application-layer data with the PDN using a corresponding IP address. On the level of the core network and the eNodeB, a plurality of special bearers are established between the core network and the eNodeB for each UE to transmit application layer data. Application layer data sent by a PDN to UE firstly enters an EPC through an SGI (core network PDN GW (gateway) and external Internet interface) interface, then the EPC analyzes a destination address of the application layer data, the destination address is matched with IP addresses of all online UEs, when the IP address of one online UE is matched, a special bearer corresponding to the online UE is obtained, the application layer data is forwarded to an eNodeB through the obtained special bearer from an S1-U interface, and finally the eNodeB delivers the application layer data to the online UE through an air interface.
In practical applications, a PDN wishes to communicate with multiple UEs, i.e. the PDN needs to send application layer data to one or more enodebs, which then broadcast the application layer data to all terminal devices under that eNodeB.
In the prior art, a specific scheme for a PDN to send application layer data to a plurality of UEs is as follows:
as shown in fig. 1, first, PDN sends application layer data to BM-SC (Broadcast multicast service center) through PDN GW, then BM-SC sends the received application layer data to MBMS (Multimedia Broadcast multicast service) GW, and then MBMS GW issues the application layer data to eNodeB in E-UTRAN, and eNodeB broadcasts the application layer data to all online UEs managed by the eNodeB through multicast channels of air interface.
However, when bandwidth resources are few, the above scheme may cause a certain pressure on the air interface resources, and may also have a large impact on the existing scheduling mechanism.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for sending application layer data.
The technical scheme of the application is as follows:
in one aspect, a method for sending application layer data is provided, where the method is applied to an EPC, and includes:
receiving an application layer data packet sent by a PDN, wherein the destination IP address of the received application layer data packet is the IP address of an SGI interface of the EPC or the IP address of an eNodeB managed by the EPC;
and encapsulating a GTPU header on the application layer data packet and sending the GTPU header to a corresponding eNodeB, wherein the value of a TEID field in the GTPU header is set to a specific value, and the specific value is used for indicating the eNodeB to broadcast the application layer data packet to all online UEs managed by the eNodeB.
In another aspect, a method for sending application layer data is further provided, where the method is applied to an eNodeB in an access network, and the method includes:
receiving an application layer data packet which is sent by a core network and encapsulated with a GTPU header, wherein the value of a TEID field in the GTPU header is set to a specific value, and the specific value is used for indicating an eNodeB to broadcast the application layer data packet to all online UEs managed by the eNodeB;
and carrying the received application layer data packet in a broadcast message and sending the broadcast message to all online UEs managed by the eNodeB.
In another aspect, a method for sending application layer data is also provided, where the method is applied to a UE, and the method includes:
receiving a broadcast message sent by an eNodeB, wherein the received broadcast message carries an application layer data packet;
and acquiring an application layer data packet carried in the received broadcast message, and sending the acquired application layer data packet to an application terminal of an industry user.
In another aspect, an apparatus for transmitting application layer data is provided, where the apparatus is applied to an EPC, and the apparatus includes:
a receiving module, configured to receive an application layer packet sent from a PDN, where a destination IP address of the received application layer packet is an IP address of an SGI interface of the EPC, or an IP address of an eNodeB managed by the EPC;
an encapsulation module, configured to encapsulate the GTPU header on the application layer packet received by the receiving module; setting the value of a TEID field in a GTPU header as a specific value, wherein the specific value is used for indicating an eNodeB to broadcast an application layer packet to all online UEs managed by the eNodeB;
and the sending module is used for sending the application layer data packet encapsulated by the encapsulating module to a corresponding eNodeB.
In another aspect, an apparatus for transmitting application layer data is also provided, where the apparatus is applied to an eNodeB in an access network, and the apparatus includes:
a receiving module, configured to receive an application layer packet encapsulated with a GTPU header from a core network, where a value of a TEID field in the GTPU header is set to a specific value, and the specific value is used to instruct an eNodeB to broadcast the application layer packet to all online UEs managed by the eNodeB;
and the sending module is used for carrying the application layer data packet received by the receiving module in a broadcast message and sending the broadcast message to all online UEs managed by the eNodeB.
In another aspect, an apparatus for transmitting application layer data is also provided, where the apparatus is applied to a UE, and the apparatus includes:
a receiving module, configured to receive a broadcast message sent by an eNodeB, where the received broadcast message carries an application layer packet;
the acquisition module is used for acquiring the application layer data packet carried in the broadcast message received by the receiving module;
and the sending module is used for sending the application layer data packet obtained by the obtaining module to an application terminal of an industry user.
The technical scheme of the application realizes a broadcast mechanism of application layer data applied to an LTE wireless communication network, and specifically, when PDN sends the application layer data to a plurality of UEs, the destination IP address of the application layer data packet is set to be the IP address of an SGI interface of EPC or the IP address of eNodeB; after receiving an application layer packet, if the destination IP address of the application layer packet is the IP address of the SGI interface of the EPC or the IP address of the eNodeB managed by the EPC, a GTPU header with a value of the TEID field set to a specific value is encapsulated on the application layer packet, and the GTPU header is sent to the corresponding eNodeB; after receiving the application layer packet encapsulated with the GTPU header with the TEID field value of a specific value, the eNodeB broadcasts the application layer packet to all online UEs managed by the eNodeB, thereby implementing the broadcast of the application layer packet. The method can realize the broadcasting of the application layer data through less change on the basis of not changing the original data path, thereby reducing the pressure of the air interface resource, reducing the traffic data volume and the data transmission pressure of a PDN, a core network and an eNodeB, and not influencing the existing scheduling mechanism.
Drawings
Fig. 1 is a schematic diagram of a system architecture when a PDN sends application layer data to multiple UEs in the prior art;
FIG. 2 is a flow chart of the EPC of an embodiment of the present application after receiving an application layer packet;
fig. 3 is a flowchart of the eNodeB according to an embodiment of the present application after receiving an application layer packet encapsulated with a GTPU header;
fig. 4 is a flowchart illustrating a process of the UE after receiving a broadcast message according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a transmission apparatus of application layer data applied to an EPC according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a transmitting apparatus of application layer data applied to an eNodeB according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an apparatus for transmitting application layer data applied to a UE according to an embodiment of the present application.
Detailed Description
In order to solve the problems that a certain pressure is caused on an empty port resource and an existing scheduling mechanism is affected in the prior art, the following embodiments of the present application provide a method for sending application layer data and a device capable of applying the method.
The method for sending the application layer data comprises the following steps:
the PDN needs to be configured with the IP address of the SGI interface of the at least one EPC and/or the IP address of the at least one eNodeB, e.g. the IP address of the SGI interface of the EPC and/or the IP address of the eNodeB to which the PDN wishes to connect. When PDN is about to send application layer data, the application layer data is sent out in an IP packet mode (called an application layer packet), and a destination IP address is set to be an IP address of an SGI interface of EPC or an IP address of eNodeB.
At the beginning of system design, a specific value is negotiated between EPC and eNodeB, for example, the specific value may be 0 xFFFF.
As shown in fig. 2, the processing flow of the EPC after receiving the application layer packet is as follows:
step S101, receiving an application layer data packet (IP data packet) sent by a PDN;
step S102, judging whether the destination IP address of the received application layer data packet is the IP address of the SGI interface of the EPC, if so, executing step S103, otherwise, executing step S104;
step S103, encapsulating a GTPU (GPRS tunneling protocol User Plane) header on a received application layer packet, and sending the header to all enodebs managed by the EPC in a connected state, where a value of a TEID (Terminal Equipment ID, tunnel termination point identifier) field in the GTPU header is set to a specific value, and the specific value is used to instruct an eNodeB to broadcast the application layer packet to all online UEs managed by the eNodeB;
in step S103, since the destination IP address of the application layer packet is the IP address of the SGI interface of the EPC, it is confirmed that the application layer packet needs to be transmitted to all the online (i.e., attached) UEs under all connected enodebs managed by the EPC in a broadcast manner, at this time, for each connected eNodeB managed by the EPC, the EPC encapsulates a GTPU header on the application layer packet, the value of the TEID field in the GTPU header is set to a specific value, for example, 0xFFFF, and the encapsulated application layer packet (GTPU packet) is transmitted to the eNodeB through the S1-U interface.
Step S104, judging whether the destination IP address of the received application layer data packet is the IP address of the eNodeB managed by the EPC, if so, executing step S105, otherwise, executing step S107;
step S105, determining whether an eNodeB (for convenience of description, denoted as eNodeB1) indicated by the destination IP address is in a connected state, if so, performing step S106, otherwise, performing step S107;
step S106, encapsulating a GTPU header on the received application layer data packet and sending the GTPU header to eNodeB1, wherein the value of the TEID field in the GTPU header is set to a specific value, and the specific value is used for indicating the eNodeB to broadcast the application layer data packet to all online UEs managed by the eNodeB;
in step S106, since the destination IP address of the received application layer packet is the IP address of eNodeB1 managed by the EPC, and eNodeB1 is in the connected state, it is confirmed that the application layer packet needs to be sent to all online UEs managed by eNodeB1 in a broadcast manner, at this time, the EPC encapsulates a GTPU header on the application layer packet, the value of the TEID field in the GTPU header is set to a specific value, for example, 0xFFFF, and sends the encapsulated application layer packet to eNodeB1 through the S1-U interface.
Step S107, the received application layer packet is discarded.
As shown in fig. 3, the processing flow of the eNodeB after receiving the application layer packet encapsulated with the GTPU header is as follows:
step S201, receiving an application layer data packet encapsulated with a GTPU header;
step S202, judging whether the value of the TEID field in the GTPU header is a specific value, if so, executing step S203, otherwise, exiting the flow;
step S203, the received application layer packet is carried in a broadcast message and sent to all online UEs managed by the eNodeB.
In step S203, since the value of the TEID field in the GTPU header is a specific value, it is determined that the received application layer packet needs to be broadcast, at this time, the eNodeB submits the application layer packet to a Radio Resource Control (RRC) layer of the eNodeB, and the RRC layer generates an air interface broadcast message after receiving the application layer packet, and delivers the generated broadcast message to the user plane so as to send the air interface broadcast message by the user plane. The broadcast message carries broadcast data packet sending indication information and a bit (bit) stream carrying the application layer data packet, wherein the broadcast data packet sending indication information is used for indicating whether the broadcast message carries the application layer data packet.
As shown in fig. 4, the processing flow of the UE after receiving the broadcast message is as follows:
step S301, receiving a broadcast message;
step S302, determining whether the broadcast data packet transmission indication information carried in the broadcast message indicates that the broadcast message carries an application layer data packet, if the broadcast message indicates that the broadcast message carries an application layer data packet, performing step S303, and if the broadcast message indicates that the broadcast message does not carry an application layer data packet, performing step S304;
step S303, acquiring an application layer data packet carried in the broadcast message, and sending the application layer data packet to an application terminal of an industry user;
in step S303, the UE reads the bit stream carrying the application layer packet in the broadcast message, and submits the application layer packet to the application layer of the UE, and the application layer sends the application layer packet to the application terminal of the industrial user.
Step S304, a processing procedure of the broadcast message in the prior art is executed, for example, parameters carried in the broadcast message are configured to the user plane and/or physical layer of the UE.
In actual implementation, the destination IP address of the application layer packet sent by the PDN may also be an IP address of the UE, and at this time, the processing flow of the PDN, the EPC, the eNodeB, and the base station for the application layer packet refers to the prior art, which is not described herein again.
The method of the embodiment of the present application implements a broadcast mechanism of application layer data applied to an LTE wireless communication network, and specifically, when a PDN is to send application layer data to a plurality of UEs, sets a destination IP address of an application layer packet to an IP address of an SGI interface of an EPC or an IP address of an eNodeB; after receiving an application layer packet, if the destination IP address of the application layer packet is the IP address of the SGI interface of the EPC or the IP address of the eNodeB managed by the EPC, a GTPU header with a value of the TEID field set to a specific value is encapsulated on the application layer packet, and the GTPU header is sent to the corresponding eNodeB; after receiving the application layer packet encapsulated with the GTPU header with the TEID field value of a specific value, the eNodeB broadcasts the application layer packet to all online UEs managed by the eNodeB, thereby implementing the broadcast of the application layer packet. The method can realize the broadcasting of the application layer data through less change on the basis of not changing the original data path, thereby reducing the pressure of the air interface resource, reducing the traffic data volume and the data transmission pressure of a PDN, a core network and an eNodeB, and not influencing the existing scheduling mechanism.
For the method in the foregoing embodiment, an apparatus for sending application layer data, to which the method may be applied, is also provided in this embodiment of the present application.
As shown in fig. 5, the transmission apparatus applied to the EPC includes the following modules: a receiving module 401, an encapsulating module 402 and a sending module 403, wherein:
a receiving module 401, configured to receive an application layer packet sent from a PDN, where a destination IP address of the received application layer packet is an IP address of an SGI interface of the EPC, or an IP address of an eNodeB managed by the EPC;
an encapsulating module 402, configured to encapsulate a GTPU header on the application layer packet received by the receiving module 401; setting the value of a TEID field in a GTPU header as a specific value, wherein the specific value is used for indicating an eNodeB to broadcast an application layer packet to all online UEs managed by the eNodeB;
a sending module 403, configured to send the application layer packet encapsulated by the encapsulating module 402 to a corresponding eNodeB.
When the destination IP address of the application layer packet received by the receiving module 401 is the IP address of the SGI interface of the EPC, the corresponding enodebs are all connected enodebs managed by the EPC.
When the destination IP address of the application layer packet received by the receiving module 401 is the IP address of the first eNodeB managed by the EPC, as shown in fig. 5, the transmitting apparatus further includes: a determining module 404, configured to determine that the first eNodeB is in a connected state before the encapsulating module 402 encapsulates the GTPU header on the received application layer packet; at this time, the corresponding eNodeB is the first eNodeB in the connected state.
Wherein the PDN is configured with an IP address of an SGI interface of the at least one EPC and/or an IP address of the at least one eNodeB.
As shown in fig. 6, the apparatus for transmitting application layer data applied to an eNodeB in an access network includes the following modules: a receiving module 501 and a sending module 502, wherein:
a receiving module 501, configured to receive an application layer packet encapsulated with a GTPU header from a core network, where a value of a TEID field in the GTPU header is set to a specific value, and the specific value is used to instruct an eNodeB to broadcast the application layer packet to all online UEs managed by the eNodeB;
a sending module 502, configured to send the application layer packet received by the receiving module 501 to all online UEs managed by the eNodeB by carrying the application layer packet in a broadcast message.
The broadcast message carries broadcast data packet sending indication information, and the broadcast data packet sending indication information is used for indicating whether the broadcast message carries an application layer data packet.
As shown in fig. 7, the apparatus for transmitting application layer data applied to a UE includes the following modules: a receiving module 601, an obtaining module 602, and a sending module 603, wherein:
a receiving module 601, configured to receive a broadcast message sent by an eNodeB, where the received broadcast message carries an application layer packet;
an obtaining module 602, configured to obtain an application layer packet carried in the broadcast message received by the receiving module 601;
a sending module 603, configured to send the application layer packet obtained by the obtaining module 602 to an application terminal of an industry user.
In summary, the above embodiments of the present application can achieve the following technical effects:
the method of the embodiment of the present application implements a broadcast mechanism of application layer data applied to an LTE wireless communication network, and specifically, when a PDN is to send application layer data to a plurality of UEs, sets a destination IP address of an application layer packet to an IP address of an SGI interface of an EPC or an IP address of an eNodeB; after receiving an application layer packet, if the destination IP address of the application layer packet is the IP address of the SGI interface of the EPC or the IP address of the eNodeB managed by the EPC, a GTPU header with a value of the TEID field set to a specific value is encapsulated on the application layer packet, and the GTPU header is sent to the corresponding eNodeB; after receiving the application layer packet encapsulated with the GTPU header with the TEID field value of a specific value, the eNodeB broadcasts the application layer packet to all online UEs managed by the eNodeB, thereby implementing the broadcast of the application layer packet. The method can realize the broadcasting of the application layer data through less change on the basis of not changing the original data path, thereby reducing the pressure of the air interface resource, reducing the traffic data volume and the data transmission pressure of a PDN, a core network and an eNodeB, and not influencing the existing scheduling mechanism.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. A method for transmitting application layer data, comprising:
at the core network EPC end:
receiving an application layer data packet sent by a Packet Data Network (PDN), wherein the destination Internet Protocol (IP) address of the received application layer data packet is the IP address of an SGI interface of the EPC or the IP address of a base station eNodeB managed by the EPC;
encapsulating a GTPU (general packet radio service) header of a tunnel protocol of a GPRS user plane on the application layer data packet and sending the GTPU header to a corresponding eNodeB, wherein the value of a TEID (tunnel endpoint identifier) field in the GTPU header is set to a specific value, and the specific value is used for indicating the eNodeB to broadcast the application layer data packet to all online terminal equipment UE managed by the eNodeB;
at the eNodeB side:
receiving an application layer data packet which is sent by the core network and encapsulated with a GTPU header, wherein the value of a TEID field in the GTPU header is set to a specific value, and the specific value is used for indicating an eNodeB to broadcast the application layer data packet to all online UEs managed by the eNodeB;
the application layer data packet is carried in a broadcast message and is sent to all online UEs managed by the eNodeB;
at the UE end:
receiving a broadcast message sent by the eNodeB, wherein the broadcast message carries an application layer data packet;
and acquiring the application layer data packet carried in the broadcast message, and sending the acquired application layer data packet to an application terminal of an industrial user.
2. The method of claim 1, wherein when the destination IP address of the received application layer packet is the IP address of the SGI interface of the EPC, the corresponding eNodeBs are all connected eNodeBs managed by the EPC.
3. The method of claim 1, wherein when the destination IP address of the received application layer packet is the IP address of the first eNodeB managed by the EPC,
before encapsulating the GTPU header on the application layer packet, the method further comprises: determining that the first eNodeB is in a connected state;
the respective eNodeB is the first eNodeB in a connected state.
4. Method according to any of claims 1 to 3, wherein the PDN is configured with the IP address of the SGI interface of at least one EPC and/or the IP address of at least one eNodeB.
5. The method of claim 1, wherein the broadcast message carries broadcast packet transmission indication information, and the broadcast packet transmission indication information is used to indicate whether the broadcast message carries the application layer packet.
6. A system for transmitting application layer data, comprising:
disposed in the core network EPC:
a first receiving module, configured to receive an application layer packet sent from a packet data network PDN, where a destination internet protocol IP address of the received application layer packet is an IP address of an SGI interface of the EPC, or an IP address of a base station eNodeB managed by the EPC;
an encapsulation module, configured to encapsulate a GTPU header of a GPRS user plane tunneling protocol on the application layer packet received by the first receiving module; setting a value of a tunnel termination point identifier (TEID) field in the GTPU header to a specific value, wherein the specific value is used for indicating an eNodeB to broadcast the application layer packet to all online terminal equipment (UE) managed by the eNodeB;
the first sending module is used for sending the application layer data packet encapsulated by the encapsulating module to a corresponding eNodeB;
set up in eNodeB:
a second receiving module, configured to receive an application layer packet encapsulated with a GTPU header from the core network, where a value of a TEID field in the GTPU header is set to a specific value, and the specific value is used to instruct an eNodeB to broadcast the application layer packet to all online terminal devices UE managed by the eNodeB;
a second sending module, configured to send the application layer packet received by the second receiving module to all online UEs managed by the eNodeB in a broadcast message;
and, disposed in the UE:
a third receiving module, configured to receive a broadcast message sent by the eNodeB, where the broadcast message carries an application layer packet;
an obtaining module, configured to obtain the application layer packet carried in the broadcast message received by the third receiving module;
and the third sending module is used for sending the application layer data packet obtained by the obtaining module to an application terminal of an industry user.
7. The system according to claim 6, wherein when the destination IP address of the application layer packet received by the first receiving module is the IP address of SGI interface of the EPC, the corresponding eNodeBs are all connected eNodeBs managed by the EPC.
8. The system according to claim 6, wherein when the destination IP address of the application layer packet received by the first receiving module is the IP address of the first eNodeB managed by the EPC,
the system further comprises: a determining module, configured to determine that the first eNodeB is in a connected state before the encapsulating module encapsulates the GTPU header on the received application layer packet;
the respective eNodeB is the first eNodeB in a connected state.
9. System according to any of claims 6 to 8, characterized in that the PDN is configured with the IP address of the SGI interface of at least one EPC and/or the IP address of at least one eNodeB.
10. The system according to claim 6, wherein the broadcast message carries broadcast packet transmission indication information, and the broadcast packet transmission indication information is used to indicate whether the broadcast message carries the application layer packet.
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