CN108616612B - Downlink data transmission method and device - Google Patents
Downlink data transmission method and device Download PDFInfo
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- CN108616612B CN108616612B CN201810312987.9A CN201810312987A CN108616612B CN 108616612 B CN108616612 B CN 108616612B CN 201810312987 A CN201810312987 A CN 201810312987A CN 108616612 B CN108616612 B CN 108616612B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5061—Pools of addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
Abstract
The invention provides a downlink data transmission method, which is applied to a packet data gateway, wherein a mapping table of a client terminal equipment address pool and a global mobile user unique identifier of the client terminal equipment is stored in the packet data gateway; the method comprises the following steps: receiving a downlink data packet transmitted to the client terminal device; determining a client terminal equipment address pool to which a destination address belongs according to the destination address of the downlink data packet; inquiring a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment according to the address pool of the client terminal equipment to which the destination address belongs, and confirming the target client terminal equipment of the downlink data packet; and sending the downlink data packet to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to the target terminal. The technical scheme can realize that the packet data gateway forwards the downlink data packet, thereby realizing downlink data transmission on the premise of not needing manual intervention and increasing networking cost.
Description
Technical Field
The present invention relates to the field of trunking communication technologies, and in particular, to a downlink data transmission method and apparatus.
Background
The broadband trunking service greatly depends on the extended coverage capability of Customer Premises Equipment (CPE), and the CPE needs to hang down Equipment such as a trunking terminal, a camera, and a vital sign monitor, so as to expand the trunking service and expand an application scenario. However, the current Evolved Packet Core (EPC) standard of 3GPP does not support a Packet Data Network Gateway (PGW) to perform address forwarding of a CPE drop terminal, which results in a problem that the CPE drop terminal cannot be down-loaded.
In the current solution, when CPEs are deployed in a large scale, each CPE is manually configured with an address, system timing, and the like, and then the address of each CPE is stored in the PGW, so that the PGW can forward a downlink data packet to the corresponding CPE. The manual deployment scheme requires a large amount of manpower, and requires high construction and maintenance costs.
Disclosure of Invention
Based on the defects and shortcomings of the prior art, the invention provides a downlink data transmission method and device, which can realize that the PGW forwards downlink data to CPE on the premise of not needing a large amount of manual deployment, thereby realizing downlink data transmission.
In order to achieve the purpose, the invention provides the following technical scheme:
a downlink data transmission method is applied to a packet data gateway, wherein a mapping table of an address pool of client terminal equipment and a unique global mobile user identifier of the client terminal equipment is stored in the packet data gateway; the method comprises the following steps:
receiving and sending a downlink data packet sent to a terminal hung down by the client terminal equipment;
determining a client terminal equipment address pool to which the destination address belongs according to the destination address of the downlink data packet;
inquiring a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment according to the address pool of the client terminal equipment to which the destination address belongs, and confirming the target client terminal equipment of the downlink data packet;
and sending the downlink data packet to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to a target terminal.
Preferably, the method further comprises:
when detecting that the client terminal equipment is attached to the network, allocating an address pool for the client terminal equipment attached to the network, and issuing the address pool allocated to the client terminal equipment.
Preferably, the method further comprises:
modifying an address pool of the client terminal equipment;
and sending the modified address pool to the client terminal equipment.
Preferably, the sending the downlink data packet to the target client terminal device includes:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment;
and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
A downlink data transmission device is applied to a packet data gateway, and the device comprises:
the storage unit is used for storing a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment;
the data receiving unit is used for receiving and sending a downlink data packet sent to a terminal hung below the client terminal equipment;
a first confirming unit, configured to determine, according to a destination address of the downlink data packet, an address pool of a client terminal device to which the destination address belongs;
a second confirming unit, configured to query, according to an address pool of the client terminal device to which the destination address belongs, the mapping table of the address pool of the client terminal device and the unique global mobile subscriber identity of the client terminal device, and confirm the destination client terminal device of the downlink data packet;
and the data sending unit is used for sending the downlink data packet to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to a target terminal.
Preferably, the apparatus further comprises:
and the address pool allocation unit is used for allocating an address pool for the client terminal equipment attached to the network when the client terminal equipment is detected to be attached to the network, and issuing the address pool allocated to the client terminal equipment.
Preferably, the apparatus further comprises:
the address pool modifying unit is used for modifying the address pool of the client terminal equipment; and sending the modified address pool to the client terminal equipment.
Preferably, when the data sending unit sends the downlink data packet to the target client terminal device, the data sending unit is specifically configured to:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment; and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
A downlink data transmission device is applied to a packet data gateway, and the device comprises:
a memory and a processor;
wherein the memory is connected with the processor and used for storing programs;
the processor is used for realizing the following functions by running the program in the memory:
storing a mapping table of a client terminal device address pool and a global mobile user unique identifier of the client terminal device; receiving and sending a downlink data packet sent to a terminal hung down by the client terminal equipment; determining a client terminal equipment address pool to which the destination address belongs according to the destination address of the downlink data packet; inquiring a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment according to the address pool of the client terminal equipment to which the destination address belongs, and confirming the target client terminal equipment of the downlink data packet; and sending the downlink data packet to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to a target terminal.
Preferably, the processor is further configured to:
when detecting that the client terminal equipment is attached to the network, allocating an address pool for the client terminal equipment attached to the network, and issuing the address pool allocated to the client terminal equipment.
Preferably, the processor is further configured to:
modifying an address pool of the client terminal equipment; and sending the modified address pool to the client terminal equipment.
Preferably, when the processor sends the downlink data packet to the target client terminal device, the processor is specifically configured to:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment; and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
The invention sets the address pool of the client terminal device and the mapping table of the global mobile user unique identification of the client terminal device in the packet data gateway, when receiving the downlink data packet, the target client terminal device of the downlink data packet can be determined by inquiring the mapping table according to the destination address of the downlink data packet. And then the downlink data packet is sent to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to the target terminal, and the downlink data packet is forwarded by the packet data gateway, so that downlink data transmission is realized on the premise of not needing manual intervention and not increasing networking cost.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a mapping table between a CPE address pool and a CPE IMSI according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a downlink data transmission method according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating another downlink data transmission method according to an embodiment of the present invention;
fig. 5 is a schematic processing timing diagram for allocating and issuing a CPE address pool for a newly attached CPE according to an embodiment of the present invention;
fig. 6 is a timing diagram of a process for modifying a CPE address pool according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an application scenario provided in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a downlink data transmission apparatus according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another downlink data transmission apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a downlink data transmission method, which is applied to a packet data gateway, wherein the packet data gateway stores a mapping table of a client terminal equipment address pool and a global mobile user unique identifier of the client terminal equipment, and a static address allocated to the client terminal equipment;
specifically, as shown in fig. 1, a communication system to which the technical solution of the embodiment of the present invention is applicable is that a system server is connected to a Serving Gateway (SGW) through a Packet Data Network Gateway (PGW), the SGW is connected to a base station, the base station manages a plurality of client terminal devices (CPEs), and each CPE hangs up a terminal device, such as a UE, a Camera or Other client terminal devices. The PGW stores mapping tables of each CPE address pool and a global Mobile Subscriber Identity (IMSI) of each CPE. The mapping table is similar to the mapping table shown in fig. 2, and records information such as the CPE address and the CPE IMSI, and the correspondence information between the CPE address and the CPE IMSI. Each CPE in the system can automatically allocate the addresses in the address pool for the terminals which are hung down. Further, the PGW assigns a static address to each CPE in the system, respectively, for association with the CPE IDSI and CPE address pools, and stores the static address of each CPE.
The technical scheme of the embodiment of the invention is suitable for the PGW in the system, so that the PGW can forward the downlink data sent by the system server to the CPE.
Referring to fig. 3, a downlink data transmission method provided in the embodiment of the present invention includes:
s301, receiving a downlink data packet sent to a terminal hung down by the client terminal equipment;
specifically, the downlink packet is a packet of downlink data transmitted from the system server in the communication system shown in fig. 1 to the terminal on which the CPE is hooked. The data packet includes a destination address, i.e. an address of a certain terminal hung by a certain CPE of the system.
S302, according to the destination address of the downlink data packet, determining a client terminal equipment address pool to which the destination address belongs;
specifically, the address of each terminal hung by the CPE is an address in its own address pool allocated by the CPE. Therefore, when the PGW forwards the downlink packet sent to the CPE drop terminal, it may determine, according to the destination address of the downlink packet, to which CPE address pool the destination address belongs.
S303, inquiring the address pool of the client terminal equipment and the mapping table of the global mobile user unique identifier of the client terminal equipment according to the address pool of the client terminal equipment to which the destination address belongs, and confirming the target client terminal equipment of the downlink data packet;
specifically, after confirming the CPE address pool to which the destination address of the downlink packet belongs, the embodiment of the present invention queries, according to the CPE address pool, the mapping table between the CPE address pool and the CPE IMSI in the PGW, and can determine the CPEIMSI corresponding to the CPE address pool, that is, the determined target CPE of the downlink packet, that is, to which CPE the downlink packet is addressed.
S304, the downlink data packet is sent to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to a target terminal.
Specifically, after confirming the target CPE of the downstream packet, that is, determining to which CPE the downstream packet is sent, the embodiment of the present invention sends the downstream packet to the target CPE. And after receiving the downlink data packet, the target CPE sends the downlink data packet to a downlink target terminal according to the target address of the data packet, so as to realize downlink data transmission.
As can be seen from the above description, in the embodiment of the present invention, by setting the mapping table of the CPE address pool and the CPE IMSI in the PGW, when a downlink packet is received, the target CPE of the downlink packet can be determined by querying the mapping table according to the destination address of the downlink packet. And then the downlink data packet is sent to the target CPE, so that the target CPE sends the downlink data packet to the target terminal, and the PGW forwards the downlink data packet, thereby realizing downlink data transmission on the premise of not needing manual intervention and not increasing networking cost.
Optionally, in another embodiment of the present invention, a specific processing procedure for the PGW to send the downlink data packet to the target CPE is further disclosed, and referring to fig. 4, the sending the downlink data packet to the target customer end device includes:
s404, according to the target client terminal device, inquiring the user context in the packet data gateway and confirming the GTP tunnel corresponding to the target client terminal device;
specifically, the GTP tunnel refers to a tunnel based on a GPRS tunneling Protocol (GPRS tunneling Protocol), that is, a data transmission channel for transmitting data based on the GPRS tunneling Protocol. When the terminal is attached to a network or network connection is established, the PGW and the SGW can mutually inform GTP tunnel information of the terminal, the GTP tunnel is used for realizing data transmission between GTP and the SGW, and further, data are sent to the CPE by the SGW through the GTP tunnel.
In the context of PGW, GTP tunnels corresponding to each CPE in the system are stored. And after the PGW confirms the target CPE of the downlink data packet, confirming the GTP tunnel corresponding to the target CPE by inquiring the context.
S405, the downlink data packet is sent to the target client terminal equipment through the GTP tunnel.
Specifically, after confirming the GTP tunnel corresponding to the target CPE, the embodiment of the present invention sends the downlink data packet to the target CPE through the GTP tunnel. And after receiving the downlink data packet, the target CPE sends the downlink data packet to a target terminal according to the destination address of the data packet, so as to realize downlink data transmission.
Steps S401 to S403 in this embodiment correspond to steps S301 to S303 in the method embodiment shown in fig. 3, and for details, please refer to the contents of the method embodiment shown in fig. 3, which is not described herein again.
Optionally, in another embodiment of the present invention, the method further includes:
when detecting that the client terminal equipment is attached to the network, allocating an address pool for the client terminal equipment attached to the network, and issuing the address pool allocated to the client terminal equipment.
Specifically, in the embodiment of the present invention, when it is detected that a new CPE is attached to the network, the PGW allocates an address pool to the newly attached CPE, and issues the allocated address pool to the newly attached CPE, thereby implementing synchronization of the address pools of the CPEs.
The PGW issues the address pool allocated to the newly attached CPE to the CPE through the SGW, eNB, and the like.
Referring to fig. 5, in the new CPE attaching process, a Create Session Response message sent by the PGW to the SGW carries a CPE address pool allocated to the newly attached CPE. Specifically, in an Additional parameters list (appended parameter list) in the PCO IE, a container identifier (e.g., 000AH) reserved by the 3GPP protocol is selected to carry the CPE address pool;
the Create Session Response message sent by the SGW to the MME carries the CPE address pool. Specifically, in an Additional parameters list (appended parameter list) in the PCO IE, a container identifier (e.g., 000AH) reserved by the 3GPP protocol is selected to carry the CPE address pool;
selecting a container identifier (such as 000AH) reserved by a 3GPP protocol from an Additional parameter list (in a PCO IE) in an ESM message container (session management message container) IE of an NAS Attach Accept message sent by an MME to the CPE to carry a CPE address pool;
and the CPE identifies an expanded CPE address pool IE in the NAS, and directly uses the CPE address pool as a DHCP address pool for address allocation of the down-hanging terminal.
Optionally, in another embodiment of the present invention, the method further includes:
modifying an address pool of the client terminal equipment;
and sending the modified address pool to the client terminal equipment.
Specifically, in the embodiment of the present invention, the PGW may further modify or delete the CPE address pool, and issue the modified CPE address pool to the CPE, thereby implementing network address pool modification synchronization.
And the PGW transmits the modified CPE address pool to the CPE through the SGW, the eNB and the like.
Referring to fig. 6, in a Bearer modification procedure triggered by the PGW, an Update Bearer Request message sent by the PGW to the SGW carries a modified CPE address pool. Specifically, in the Additional parameters list in the PCO IE, the container identifier (e.g., 000AH) reserved by the 3GPP protocol is selected to carry the modified CPE address pool, and if the delete CPE address pool operation is performed, this field is directly taken to be 0.
And the SGW sends an Update Bearer Request message to the MME, wherein the Update Bearer Request message carries the modified CPE address pool. Specifically, in the Additional parameters list in the PCO IE, the container identifier (e.g. 000AH) reserved by the 3GPP protocol is selected to carry the modified CPE address pool, and if the CPE address pool deletion operation is performed, this field is directly 0.
In an Additional parameter list in a PCO IE of an NAS modification EPS Bearer Context Request message sent by the MME to the CPE, a container identifier (e.g., 000AH) reserved by the 3GPP protocol is selected to carry the modified CPE address pool, and if the CPE address pool is deleted, the field is directly 0.
And the CPE identifies an expanded CPE address pool IE in the NAS, and directly uses the CPE address pool as a DHCP address pool for address allocation of the down-hanging terminal. If the CPE address pool is 0, the default DHCP address pool of the CPE is used.
In order to more vividly describe the technical solutions of the embodiments of the present invention, the following examples illustrate the technical solutions proposed by the embodiments of the present invention.
For example, as shown in fig. 7, the UE dynamic address Pool is configured to be 10.0.0.1 to 10.0.0.254 in the PGW, the IP address of CPE1 is 10.0.1.1, the IP address of CPE1IP Pool is 10.0.1.2 to 10.0.1.254, the IP address of CPE2 is 10.0.2.1, and the IP address of CPE2IP Pool is 10.0.2.2 to 10.0.2.254. When the CPE is attached, the PGW carries CPE IP Pool through PCO IE in messages such as Create Session Response and Attach Accept, and the CPE takes the obtained CPE IP Pool as a DHCP address Pool to allocate the address for the equipment. When the CPE IP Pool is modified or deleted in the PGW, the PGW carries the CPE IP Pool through PCO IEs in messages such as Update Bearer Request, modification EPS Bearer Context Request and the like, and the CPE is used as a DHCP address Pool to allocate an address for the equipment after obtaining the CPE IP Pool. Therefore, the problem of downlink access of the CPE down-hanging terminal is solved ingeniously, and real-time synchronization of CPE IP Pool between the PGW and the CPE is guaranteed.
The scheme can realize that the UE hung down by the CPE or the UE hung down by the UE can carry out services such as end-to-end audio and video screens and the like, and can realize the address pool synchronization of the PGW and the CPE.
The embodiment of the invention discloses a downlink data transmission device, which is applied to a packet data gateway, and as shown in figure 8, the device comprises:
a storage unit 100, configured to store a mapping table of an address pool of a client terminal device and a global mobile subscriber unique identifier of the client terminal device;
a data receiving unit 110, configured to receive a downlink data packet sent to a terminal that is hung down by a client terminal device;
a first determining unit 120, configured to determine, according to a destination address of the downlink data packet, an address pool of a client terminal device to which the destination address belongs;
a second confirming unit 130, configured to query, according to the address pool of the client terminal device to which the destination address belongs, the mapping table of the address pool of the client terminal device and the unique global mobile subscriber identity of the client terminal device, and confirm the target client terminal device of the downlink data packet;
a data sending unit 140, configured to send the downlink data packet to the target client terminal device, so that the target client terminal device sends the downlink data packet to a target terminal.
Optionally, in another embodiment of the present invention, the apparatus further includes:
and the address pool allocation unit is used for allocating an address pool for the client terminal equipment attached to the network when the client terminal equipment is detected to be attached to the network, and issuing the address pool allocated to the client terminal equipment.
Optionally, in another embodiment of the present invention, the apparatus further includes:
the address pool modifying unit is used for modifying the address pool of the client terminal equipment; and sending the modified address pool to the client terminal equipment.
Optionally, in another embodiment of the present invention, when the data sending unit sends the downlink data packet to the target client terminal device, the data sending unit is specifically configured to:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment; and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
Specifically, please refer to the contents of the above method embodiments for the specific working contents of each unit in the above embodiments, which are not described herein again.
The embodiment of the present invention also discloses another downlink data transmission apparatus, which is applied to a packet data gateway, and as shown in fig. 9, the apparatus includes:
a memory 200 and a processor 210;
wherein, the memory 200 is connected to the processor 210 for storing programs;
the processor 210 is configured to implement the following functions by running the program in the memory 200:
storing a mapping table of a client terminal device address pool and a global mobile user unique identifier of the client terminal device; receiving and sending a downlink data packet sent to a terminal hung down by the client terminal equipment; determining a client terminal equipment address pool to which the destination address belongs according to the destination address of the downlink data packet; inquiring a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment according to the address pool of the client terminal equipment to which the destination address belongs, and confirming the target client terminal equipment of the downlink data packet; and sending the downlink data packet to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to a target terminal.
Optionally, in another embodiment of the present invention, the processor 210 is further configured to:
when detecting that the client terminal equipment is attached to the network, allocating an address pool for the client terminal equipment attached to the network, and issuing the address pool allocated to the client terminal equipment.
Optionally, in another embodiment of the present invention, the processor 210 is further configured to:
modifying an address pool of the client terminal equipment; and sending the modified address pool to the client terminal equipment.
Optionally, in another embodiment of the present invention, when the processor 210 sends the downlink data packet to the target client terminal device, specifically, the processor is configured to:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment; and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
Specifically, please refer to the contents of the above method embodiments for the specific working contents of each part in the above embodiments, which are not described herein again.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A downlink data transmission method is characterized in that the method is applied to a packet data gateway, and a mapping table of a client terminal equipment address pool and a global mobile user unique identifier of the client terminal equipment is stored in the packet data gateway; the method comprises the following steps:
receiving and sending a downlink data packet sent to a terminal hung down by the client terminal equipment;
determining a client terminal equipment address pool to which the destination address belongs according to the destination address of the downlink data packet;
inquiring a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment according to the address pool of the client terminal equipment to which the destination address belongs, and confirming the target client terminal equipment of the downlink data packet;
sending the downlink data packet to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to a target terminal;
when detecting that a new client terminal device is attached to the network, allocating an address pool for the client terminal device attached to the network, and issuing the address pool allocated to the client terminal device; wherein, in the process of attaching the new client terminal device, sending a session creating response to the service gateway, wherein the container identifier reserved in the communication protocol in the session creating response adds the client terminal device address pool allocated to the newly attached client terminal device;
modifying an address pool of the client terminal equipment; sending the modified address pool to the client terminal equipment through updating the bearing request message; and selecting a container identifier reserved by a communication protocol from an additional parameter list sent to the service gateway to carry the modified address pool.
2. The method of claim 1, wherein said sending the downstream packet to the target client terminal device comprises:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment;
and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
3. A downlink data transmission apparatus, applied to a packet data gateway, the apparatus comprising:
the storage unit is used for storing a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment;
the data receiving unit is used for receiving and sending a downlink data packet sent to a terminal hung below the client terminal equipment;
a first confirming unit, configured to determine, according to a destination address of the downlink data packet, an address pool of a client terminal device to which the destination address belongs;
a second confirming unit, configured to query, according to an address pool of the client terminal device to which the destination address belongs, the mapping table of the address pool of the client terminal device and the unique global mobile subscriber identity of the client terminal device, and confirm the destination client terminal device of the downlink data packet;
a data sending unit, configured to send the downlink data packet to the target client terminal device, so that the target client terminal device sends the downlink data packet to a target terminal;
the system comprises an address pool allocation unit, a client terminal device and a server, wherein the address pool allocation unit is used for allocating an address pool for the client terminal device attached to a network and issuing the address pool allocated to the client terminal device when detecting that a new client terminal device is attached to the network; wherein, in the process of attaching the new client terminal device, sending a session creating response to the service gateway, wherein the container identifier reserved in the communication protocol in the session creating response adds the client terminal device address pool allocated to the newly attached client terminal device;
the address pool modifying unit is used for modifying the address pool of the client terminal equipment; sending the modified address pool to the client terminal equipment; and selecting a container identifier reserved by a communication protocol from an additional parameter list sent to the service gateway to carry the modified address pool.
4. The apparatus according to claim 3, wherein when the data sending unit sends the downlink data packet to the target client terminal device, the data sending unit is specifically configured to:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment; and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
5. A downlink data transmission apparatus, applied to a packet data gateway, the apparatus comprising:
a memory and a processor;
wherein the memory is connected with the processor and used for storing programs;
the processor is used for realizing the following functions by running the program in the memory:
storing a mapping table of a client terminal device address pool and a global mobile user unique identifier of the client terminal device; receiving and sending a downlink data packet sent to a terminal hung down by the client terminal equipment; determining a client terminal equipment address pool to which the destination address belongs according to the destination address of the downlink data packet; inquiring a mapping table of the address pool of the client terminal equipment and the unique global mobile user identifier of the client terminal equipment according to the address pool of the client terminal equipment to which the destination address belongs, and confirming the target client terminal equipment of the downlink data packet; sending the downlink data packet to the target client terminal equipment, so that the target client terminal equipment sends the downlink data packet to a target terminal;
when detecting that a new client terminal device is attached to the network, allocating an address pool for the client terminal device attached to the network, and issuing the address pool allocated to the client terminal device; wherein, in the process of attaching the new client terminal device, sending a session creating response to the service gateway, wherein the container identifier reserved in the communication protocol in the session creating response adds the client terminal device address pool allocated to the newly attached client terminal device;
modifying an address pool of the client terminal equipment; sending the modified address pool to the client terminal equipment; and selecting a container identifier reserved by a communication protocol from an additional parameter list sent to the service gateway to carry the modified address pool.
6. The apparatus according to claim 5, wherein when the processor sends the downlink data packet to the target client terminal device, the processor is specifically configured to:
inquiring the user context in the packet data gateway according to the target client terminal equipment, and confirming a GTP tunnel corresponding to the target client terminal equipment; and sending the downlink data packet to the target client terminal equipment through the GTP tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810312987.9A CN108616612B (en) | 2018-04-09 | 2018-04-09 | Downlink data transmission method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810312987.9A CN108616612B (en) | 2018-04-09 | 2018-04-09 | Downlink data transmission method and device |
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