WO2012130064A1 - Procédé et système de transmission de données - Google Patents

Procédé et système de transmission de données Download PDF

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Publication number
WO2012130064A1
WO2012130064A1 PCT/CN2012/072669 CN2012072669W WO2012130064A1 WO 2012130064 A1 WO2012130064 A1 WO 2012130064A1 CN 2012072669 W CN2012072669 W CN 2012072669W WO 2012130064 A1 WO2012130064 A1 WO 2012130064A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
gateway
packet
unreachable
data
Prior art date
Application number
PCT/CN2012/072669
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English (en)
Chinese (zh)
Inventor
郭雅莉
张万强
胡华东
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2012130064A1 publication Critical patent/WO2012130064A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission data transmission method and system. Background technique
  • MTC Machine Type Communications
  • the source of such a service usually has the characteristics of delay tolerance. That is to say, after the service source sends the service data, it does not care whether the service data can reach the other party in real time, and can accept a long time delay, for example, Hours, even dozens of hours of delay.
  • the source of services such as MTC is in today's mainstream communication networks such as SAE (system architecture evolution), WCDMA (Wideband Code Division Multiple Access), and Worldwide Interoperability (WiMAX).
  • SAE system architecture evolution
  • WCDMA Wideband Code Division Multiple Access
  • WiMAX Worldwide Interoperability
  • GSM Global System for Mobile Communications
  • a terminal accesses a mobility management entity (MME-Mobile Management Entity) of a core network and a serving gateway (S-GW) through an evolved base station (eNodeB).
  • MME-Mobile Management Entity mobility management entity
  • S-GW serving gateway
  • eNodeB evolved base station
  • the mobility management entity When the mobility management entity is overloaded, the mobility management entity indicates the packet loss ratio and the packet loss period to the serving gateway.
  • the serving gateway follows the priority of the bearer. The level discards the data packet. For the discarded data packet, the serving gateway does not need to send a downlink data notification message to the mobility management entity to trigger the mobile management entity to ping the user equipment (UE, User Equipment), so the load of the MME is alleviated.
  • UE User Equipment
  • the serving gateway discards the low priority packets.
  • the source of the service such as the MTC server, does not know that the data is discarded because the user equipment is in the non-connected state.
  • the MTC server repeatedly sends the data packet according to the application layer for a long time without response, and the data packet is transmitted through the packet data gateway.
  • the service gateway is discarded, resulting in a large waste of network resources.
  • a terminal passes through a 3G base station (NodeB) to reach a radio network controller (RNC) and then accesses a general packet of the core network.
  • the service node [SGSN, Serving GPRS (General Packet Radio Service) Support Node] of the wireless service is connected to the gateway node of the general packet radio service (GGSN, Gateway GPRS (General Packet Radio Service) Support Node] through the SGSN.
  • the NodeB plus RNC has the function of the evolved base station in the SAE communication system, and the SGSN implements the functions of the mobility management entity and the service gateway.
  • a service source such as an MTC server may also be discarded because the user equipment is in a non-connected state, and the unreachable data is continuously sent to the user equipment, and the data packet needs to be sent to the GGSN.
  • the SGSN is discarded, resulting in a large waste of network resources.
  • Embodiments of the present invention provide a data transmission data transmission method and system to reduce the transmission path of invalid data packets and reduce network resource waste.
  • An embodiment of the present invention provides a data transmission method, including: a delay tolerance feature of a serving packet sent by a serving gateway according to a data packet sent to the user equipment, or a delay tolerance feature of the user equipment when the user equipment is in an idle state. , discarding the data packet sent to the user equipment;
  • the service gateway indicates that the user equipment of the packet data gateway is in an unreachable idle state; the packet data gateway discards the subsequently received data packet sent to the unreachable user equipment.
  • a data transmission system includes a transmission source, a packet data gateway, a service gateway, and a user equipment.
  • the service gateway sends the information to the user equipment according to the The delay tolerance feature carried by the data packet or the delay tolerance feature of the user equipment, discarding the data packet sent by the sending source to the user equipment, and indicating that the user equipment user equipment is in an unreachable state, the number of packets
  • the data gateway discards the subsequently received data packet sent to the unreachable user equipment.
  • the serving gateway of the foregoing embodiment discards the data packet sent to the unreachable user equipment according to the delay tolerance feature of the user equipment or the bearer
  • the service gateway indicates the unreachable state of the user equipment to the packet data gateway, so that the packet data gateway can be After receiving the subsequent data packets, they are directly discarded, thereby reducing the invalid transmission of data between the core network devices such as the service gateway and the packet data gateway, thereby reducing the network burden and reducing network resource waste.
  • Figure 1 is a schematic diagram of a conventional communication system
  • FIG. 2 is a schematic diagram of another existing communication system
  • FIG. 3 is a schematic flowchart of a data transmission method according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a data transmission method according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a data transmission method according to another embodiment of the present invention
  • FIG. 7 is a flowchart of processing a user equipment connected by an idle state according to another embodiment of the present invention.
  • FIG. 8 is a flowchart of a data transmission method according to another embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a data transmission system according to an embodiment of the present invention. Specific real
  • the second embodiment of the present invention provides a data transmission method, including:
  • Step 101a When the user equipment is in an idle state, the serving gateway discards the data packet sent to the user equipment according to the delay tolerance feature of the user equipment or the bearer.
  • the sending source sends the data packet to the user equipment
  • the data packet is sent to the serving gateway via the packet data gateway, and the serving gateway further according to the user equipment delay tolerance feature or the data packet.
  • the delay tolerance feature of the bearer and the idle state of the user equipment at this time discard the received data packet.
  • the idle state refers to that when the user equipment is attached to the network, it is turned into a silent state because it is not used for a long time, and needs to be re-awakened by the mobility management entity to receive the data information. Since the priority of the user equipment or service with the delay tolerance feature is low, the mobility management entity usually does not wake up the user equipment. Therefore, the user equipment is in an information unreachable state at this time.
  • the main way for the foregoing service gateway to acquire the characteristics of the user equipment is that when the user equipment is attached to the network, the user equipment sends the characteristics of the user equipment to the mobility management entity through a non-access layer (Non Access Stratum) message or The mobility management entity obtains the characteristics of the user equipment directly from the Home Subscriber Server (HSS), and then sends the user equipment feature to the service gateway through the mobility management entity.
  • the service gateway obtains the main characteristics of the bearer feature (including the delay tolerance feature).
  • the method is that when the bearer is set up for the user equipment, the packet data gateway aggregates the services of the same service feature in the same bearer, and the service gateway learns from the packet data gateway whether the bearer of the user equipment has delay tolerance in the bearer setup or bearer modification process.
  • the bearer feature may be a delay tolerance feature of the bearer or a priority of the bearer.
  • Step 102a The serving gateway indicates that the user equipment of the packet data gateway is in an unreachable state.
  • the serving gateway after discarding the data packet sent to the idle user equipment, the serving gateway sends a status indication that the user equipment is unreachable to the bearer peer that transmits the data packet, that is, the packet data gateway, and the status indication
  • a specially defined packet information may be used or a specific control plane message may be used; the service gateway records the status indication of the packet data gateway while transmitting a status indication to the corresponding packet data gateway, the addressing information The address and port information of the packet data gateway, the addressing information of the corresponding bearer, or a flag for the corresponding bearer context.
  • Step 103a The packet data gateway discards the subsequently received data packet sent to the unreachable user equipment.
  • the packet data gateway discards all subsequent received data packets sent to the user equipment; for the bearer, after receiving the indication, the packet data gateway receives the indication Performing an operation of discarding subsequently received data packets only for bearers with delay tolerance characteristics or lower priority;
  • the serving gateway of the foregoing embodiment discards the data packet sent to the unreachable user equipment according to the delay tolerance feature of the user equipment or the bearer
  • the service gateway indicates the unreachable state of the user equipment to the packet data gateway, so that the packet data gateway can be After receiving the subsequent data packets, they are directly discarded, thereby reducing the invalid transmission of data between the core network devices such as the service gateway and the packet data gateway, thereby reducing the network burden and reducing network resource waste.
  • the second embodiment of the present invention provides a data transmission method, including:
  • Step 101b When the user equipment is in an idle state, the serving gateway discards the data packet sent to the user equipment according to the delay tolerance feature of the user equipment or the bearer. Specifically, after the user equipment changes from the connected state to the idle state, if the sending source sends the data packet to the user equipment, the data packet is sent to the serving gateway via the packet data gateway, and the serving gateway further according to the user equipment or the data packet belongs to the bearer. The tolerance feature and the idle state of the user equipment at this time are discarded, and the received data packet is discarded.
  • Step 102b The serving gateway indicates that the user equipment of the packet data gateway is in an unreachable state.
  • the serving gateway after discarding the data packet sent to the idle user equipment, the serving gateway sends a status indication that the user equipment is unreachable to the bearer peer that transmits the data packet, that is, the packet data gateway, and the status indication
  • a specially defined packet information may be used or a specific control plane message may be used; the service gateway records the status indication of the packet data gateway while transmitting a status indication to the corresponding packet data gateway, the addressing information The address and port information of the packet data gateway, the addressing information of the corresponding bearer, or a flag for the corresponding bearer context.
  • Step 103b The packet data gateway notifies that the user equipment of the source is unreachable. Specifically, for the user equipment with delay tolerance, after receiving the indication, the packet data gateway extracts, from all subsequent data packets sent to the user equipment, the source address of the sending source, and Discarding the data packet sent to the user equipment; for the bearer, after receiving the indication, the packet data gateway only performs the extraction of the source address and the data packet from the data packet for the bearer with the delay tolerance feature or the lower priority.
  • the packet data gateway records the address of the sending source and sends the user equipment unreachable status to the sending source through the address.
  • the sending source is the MTC server or other peer device.
  • the status indication that the packet data gateway is unreachable to the user equipment sent by the source device may use a specially defined Internet Control Message Protocol (ICMP) packet.
  • ICMP Internet Control Message Protocol
  • Step 104b The sending source stops sending a data packet to the user equipment.
  • the unreachable user equipment After receiving the indication of the unreachable state of the user equipment, the source end stops The unreachable user equipment sends a data packet.
  • the service data gateway After the service gateway of the foregoing embodiment discards the data packet sent to the unreachable user equipment according to the delay tolerance feature of the user equipment or the bearer, the service data gateway transmits the status indication of the user equipment unreachable to the corresponding sending source by using the packet data gateway. End, the source end is informed of the current state of the user equipment in time, and the invalid data packet is not repeatedly sent, thereby reducing network load and reducing network resource waste.
  • a processing procedure after the user equipment changes from an idle state to a connected state includes the following steps:
  • Step 201 After the user equipment is switched to the connection state, the serving gateway sends the user equipment reachability status to the packet data gateway that has sent the user equipment unreachable status indication. Specifically, when the user equipment turns to After the connection state, the service network sends the user equipment reachability status indication to the packet data gateway of the opposite end according to the packet data gateway addressing information recorded when the corresponding user equipment unreachable status indication is sent.
  • the user equipment reachable status indication may indicate or use a particular control plane message using a specially defined data packet.
  • Step 202 After receiving the user equipment reachability status indication, the packet data gateway sends the user equipment reachability status to the sending source end corresponding to the user equipment unreachable status indication. Specifically, the packet data gateway And after receiving the user equipment reachability status indication, sending, according to the sending source address recorded by the packet data gateway after receiving the user equipment unreachable status indication, sending the user equipment reachability status indication to the sending source end.
  • the reachable status indication sent by the packet data gateway to the user equipment may be a specially defined Internet Control Message Protocol (ICMP) packet.
  • ICMP Internet Control Message Protocol
  • Step 203 After receiving the user equipment reachability status indication, the sending source end resumes data packet sending to the user equipment.
  • a data transmission method for a user equipment or a bearer having a delay tolerance feature including:
  • Step 301 When the user equipment is in an idle state, the serving gateway discards the data packet sent to the user equipment according to the delay tolerance feature of the user equipment or the bearer.
  • Step 302 The serving gateway indicates that the user equipment of the packet data gateway is in an unreachable idle state.
  • the serving peer end transmitting the data packet, that is, the packet data gateway, sends a status indication that the user equipment is unreachable, but The addressing information of the packet data gateway is no longer recorded.
  • Step 303 When the packet data gateway receives the unreachable status indication of the user equipment, start a timer and perform a packet loss operation before the timer expires.
  • the packet data gateway Before expiration of the timer, for the user equipment with delay tolerance, after receiving the indication, the packet data gateway extracts and sends the data packet from all subsequent received data packets sent to the user equipment. Transmitting the source address, and discarding the data packet sent to the user equipment; for the bearer, after receiving the indication, the packet data gateway only performs the extraction and sending of the data packet from the bearer with the delay tolerance feature or the lower priority. The source address and the operation of dropping the packet.
  • the packet data After the expiration of the timer, the packet data no longer discards the data packet sent by the source to the user equipment.
  • Step 304 The packet data gateway notifies that the user equipment of the source is unreachable. After the timer is started, the packet data gateway sends the unreachable status indication of the user equipment to the sending source according to the addressing information of the sending source obtained in step 303.
  • Step 305 The sending source stops sending a data packet to the user equipment.
  • Step 306 The sending source end reports a reachable status of the user to the HSS.
  • Step 307 The HSS sends a user reachability report indication to the mobility management entity.
  • a processing procedure after the user equipment changes from an idle state to a connected state includes the following steps: Step 401: After the user equipment changes from the idle state to the connected state, the mobility management entity reports to the HSS that the user equipment is switched to the connected state.
  • the HSS can also sign the user reachability status report, and the HSS configures the user equipment reachability report for the mobile management entity. Therefore, after the user equipment changes from the idle state to the connected state, the mobility management entity directly reports to the HSS that the user equipment is switched to the connected state.
  • Step 402 After receiving the indication, the HSS sends a user equipment reachability status indication to the sending source end that requests the user equipment reachability status report.
  • Step 403 After receiving the indication of the reachability status of the user equipment, the source end recovers the data packet transmission to the user equipment.
  • another embodiment of the present invention provides a data transmission method for a user equipment or service having a delay tolerance feature, including:
  • Step 501 When the user equipment is in an idle state, the serving gateway discards the data packet sent to the user equipment according to the delay tolerance feature of the user equipment or the bearer.
  • Step 502 The serving gateway indicates that the user equipment of the packet data gateway is in an unreachable idle state.
  • the serving peer end transmitting the data packet, that is, the packet data gateway, sends a status indication that the user equipment is unreachable, but The addressing information of the packet data gateway is no longer recorded.
  • Step 503 When the packet data gateway receives the unreachable status indication of the user equipment, start a timer and perform a packet loss operation before the timer expires.
  • the packet data gateway Before expiration of the timer, for the user equipment with delay tolerance, after receiving the indication, the packet data gateway extracts and sends the data packet from all subsequent received data packets sent to the user equipment. Transmitting the source address, and discarding the data packet sent to the user equipment; for the bearer, after receiving the indication, the packet data gateway only performs the extraction and sending of the data packet from the bearer with the delay tolerance feature or the lower priority. The source address and the operation of dropping the packet. After the expiration of the timer, the packet data no longer discards the data packet sent by the sending source to the user equipment.
  • Step 504 The packet data gateway notifies that the user equipment of the sending source is unreachable. After the packet data gateway starts the timer, the addressing information of the source is obtained from the data packet sent to the user equipment, and the unreachable status indication of the user equipment is sent to the source by using the addressing information.
  • Step 505 The sending source stops sending a data packet to the user equipment and starts a timer at the same time, and resumes data packet sending to the user equipment after the timer expires.
  • the reachable state indication of the user equipment is not sent to the sending source end, but the source end is controlled by a timer. After the timer expires, the source will automatically resume sending regardless of the state of the user equipment. If the user equipment is still in an idle unreachable state, the steps of 501-505 are repeated.
  • an embodiment of the present invention provides a data transmission system, where the system includes a source, a packet data gateway, a service gateway, and a user equipment.
  • the user equipment delay tolerance feature or the service data sent by the source to the user equipment has a delay tolerance feature.
  • the serving gateway of the data transmission system discards the data packet sent by the sending source to the user equipment according to the delay tolerance feature of the user equipment or the bearer, and the user equipment is in an idle state, and indicates that the user equipment of the user equipment is unreachable.
  • the packet data gateway further informs the sending source end that the user equipment is in an unreachable state, and the service source end stops sending the unreachable data packet to the user equipment repeatedly.
  • the sending source sends the data packet to the user equipment
  • the data packet is sent to the serving gateway via the packet data gateway, and the serving gateway further according to the delay tolerance characteristics of the user equipment and the user.
  • the device is in an idle state at this time, and the received data packet is discarded.
  • the above packet loss suppression retransmission system further includes a mobility management entity and an HSS (Home Subscriber Server, home subscriber server).
  • the main way for the foregoing service gateway to acquire the characteristics of the user equipment is that when the user equipment is attached to the network, the user equipment sends the characteristics of the user equipment to the mobility management entity through a non-access layer (Non Access Stratum) message or The mobile management entity obtains the characteristics of the user equipment directly from the HSS, and then sends the user equipment feature to the service gateway through the mobility management entity.
  • the main way for the service gateway to acquire the bearer feature (including the delay tolerance feature) is when the bearer is established for the user equipment.
  • the packet data gateway aggregates the services of the same service feature in the same bearer, and the service gateway learns whether the bearer of the corresponding user equipment has a delay tolerance feature through the bearer establishment process, thereby extracting the bearer feature.
  • the serving gateway After discarding the data packet sent to the idle user equipment, the serving gateway sends a status indication that the user equipment is unreachable to the opposite end of the GTP (GPRS Tunneling Protocol) tunnel that transmits the data packet, that is, the packet data gateway
  • the status indication may use a specially defined data packet information or use a specific control plane message; the service gateway records the relevant addressing information of the packet data gateway while transmitting a status indication to the corresponding packet data gateway,
  • the address information includes address and port information of the packet data gateway, corresponding GTP tunnel information, or marking the corresponding GTP tunnel.
  • the foregoing packet data gateway After receiving the indication, the foregoing packet data gateway extracts the source address of the packet sent from the subsequently received user equipment, and discards the data packet sent to the user equipment; the address obtained by the packet data gateway Sends a status indication that the user equipment is unreachable to the sending source.
  • the above source is the MTC server or other peer device.
  • the status indication that the packet data gateway is unreachable to the user equipment sent by the source device may use a specially defined Internet Control Message Protocol (ICMP) packet.
  • ICMP Internet Control Message Protocol
  • the service gateway of the packet loss suppression retransmission system After the service gateway of the packet loss suppression retransmission system discards the data packet sent to the unreachable user equipment according to the delay tolerance feature of the user equipment or the bearer, the service gateway transmits the status indication of the user equipment unreachable to the packet data gateway.
  • the corresponding source end enables the source end to know the current state of the user equipment in time, and does not repeatedly send invalid data packets, thereby reducing network load and reducing network resource waste.
  • the network element provided in this embodiment is the same as the corresponding network element in the method embodiment. The specific implementation process is not described here.
  • the data transmission data transmission method and system provided by the embodiments of the present invention are applicable to various network systems, and different network systems may perform equivalent or similar network element replacement.
  • the embodiment of the present invention takes an LTE communication system as an example, wherein the serving gateway is an SGW, the packet data gateway is a PDN GW, and the mobility management entity is an MME, and other communication systems can perform similar network element replacement.
  • an SGSN is used for a UMTS system.
  • the GGSN is used instead of the PDN GW
  • the HLR is used instead of the HSS, and other systems perform the equivalent network element replacement in this way, which will not be described in detail here.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé et un système de transmission de données, lequel procédé comprend les opérations suivantes : lorsqu'un équipement utilisateur est dans un état inactif, sur la base d'une spécification de tolérance de retard d'un support dans lequel se trouve un paquet de données à transmettre à l'équipement utilisateur ou d'une spécification de tolérance de retard de l'équipement utilisateur, une passerelle de desserte abandonne le paquet de données à transmettre à l'équipement utilisateur; puis la passerelle de desserte envoie une instruction à une passerelle de données par paquets indiquant que l'équipement utilisateur est dans un état inactif injoignable; et lors de la réception de l'instruction, la passerelle de données par paquets abandonne des paquets de données subséquemment reçus à transmettre à l'équipement utilisateur injoignable. Lorsque le paquet de données à transmettre à l'équipement utilisateur injoignable est abandonné par la passerelle de desserte du mode de réalisation sur la base de la spécification de tolérance de retard de l'équipement utilisateur ou du support, et que la passerelle de données par paquets reçoit l'instruction indiquant que l'équipement utilisateur est dans l'état injoignable, la passerelle de données par paquets est autorisée à abandonner directement les paquets de données subséquemment reçus, ce qui réduit ainsi une transmission invalide de données entre des dispositifs de cœur de réseau, tels que la passerelle de desserte et la passerelle de données par paquets, pour ainsi réduire la charge du réseau et réduire en même temps un gaspillage de ressources du réseau.
PCT/CN2012/072669 2011-03-30 2012-03-21 Procédé et système de transmission de données WO2012130064A1 (fr)

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CN201110078410.4A CN102724703B (zh) 2011-03-30 2011-03-30 数据传输方法以及系统
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