WO2016154804A1 - 数据传输方法、接入网设备和通信系统 - Google Patents
数据传输方法、接入网设备和通信系统 Download PDFInfo
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- WO2016154804A1 WO2016154804A1 PCT/CN2015/075232 CN2015075232W WO2016154804A1 WO 2016154804 A1 WO2016154804 A1 WO 2016154804A1 CN 2015075232 W CN2015075232 W CN 2015075232W WO 2016154804 A1 WO2016154804 A1 WO 2016154804A1
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- network device
- access network
- control plane
- plane interface
- core network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
- H04W76/38—Connection release triggered by timers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
Definitions
- the embodiments of the present invention relate to communication technologies, and in particular, to a data transmission method, an access network device, and a communication system.
- FIG. 1 is a schematic diagram of a system architecture of an existing LTE network.
- the LTE network mainly includes an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 110 and a Core Network (CN) 120.
- the E-UTRAN mainly includes an evolved base station (also referred to as an evolved Node B (eNB) 111);
- the core network 120 mainly includes a Mobility Management Entity (MME) 121 and a service gateway ( The Serving Gateway (S-GW) 122, the Policy and Charging Rules Function (PCRF) entity 123, and the PDN Gateway (P-GW) 124.
- MME Mobility Management Entity
- S-GW Serving Gateway
- PCRF Policy and Charging Rules Function
- P-GW Packed Data Network Gateway
- a User Equipment (UE) accesses the wireless network through the eNB 111 and establishes a connection with an external network, such as the Internet, through the core network.
- an external network such as the Internet
- control plane also known as the signaling plane
- user plane also known as the data plane
- Network element processing User plane data is transmitted between the eNB 111 and the S-GW 122 in the core network 120.
- the interface between the two is defined as an S1 user plane interface (hereinafter referred to as an S1-U interface);
- control plane data is transmitted between the eNB 111 and the MME 121, and the two The interface between them is defined as an S1 control plane interface (hereinafter referred to as an S1-MME interface).
- S1-U interface S1 user plane interface
- S1-MME interface S1 control plane interface
- the eNB immediately releases the control plane resources and the user plane resources, causing user service interruption and affecting the user experience.
- embodiments of the present invention provide a data transmission method, an access network device, and a communication system to reduce the impact of control plane interruption on user experience.
- a first aspect of the present invention provides a data transmission method, where the method is used in a communication system, where the communication system includes an access network device and a core network device, where the core network device includes a first core network element and a second a core network element, wherein the access network device has a control plane interface with the first core network element, and the access network device and the second core network element have a user interface.
- the method includes:
- the access network device establishes a bearer according to the bearer information to be established;
- the access network device uses the established bearer to transmit data to be transmitted in the existing service of the user equipment UE.
- the method further includes:
- the access network device When the access network device receives the data of the UE, the first timer is started or reset, where the first timer is used to record the inactivity duration of the UE;
- the access network device releases the radio resource control RRC connection of the UE.
- the method further includes:
- the access network device detects whether the control plane interface signal returns to normal
- the access network device releases the RRC connection of the UE.
- the method further includes:
- the access network device When the control plane interface signal is interrupted, the access network device starts a second timer;
- the access network device releases the RRC connection of the UE.
- any one of the first to third possible implementation manners of the first aspect in a fourth possible implementation manner of the first aspect, before the control plane interface signal returns to normal, When the UE initiates a control plane connection to establish a new service, the access network device releases the RRC connection of the UE.
- the method further includes:
- the access network device sets the state of the cell covered by the access network device to a reserved state, and the reserved state is used to prohibit the UE in the idle state from accessing.
- a second aspect of the present invention provides an access network device, where the access network device is applied to a communication system, where the communication system includes the access network device and a core network device, and the core network device includes a first core. a network element and a second core network element, wherein the access network device and the first core network element have a control plane interface, and the access network device and the second core network element There is a user plane interface, and the core network device includes:
- a processing module configured to obtain, by using the control plane interface, information about a bearer to be established from the first core network element
- the processing module is further configured to establish a bearer according to the information about the bearer to be established;
- a sending module configured to notify, by the first core network element, the established bearer to the second core network element
- the sending module is further configured to: when the control plane interface signal is interrupted, use the established bearer to transmit data to be transmitted in the existing service of the user equipment UE.
- the processing module is further configured to:
- the access network device receives the data of the UE, starting or resetting a first timer, where the first timer is used to record an inactivity duration of the UE;
- the radio resource control RRC connection of the UE is released.
- the processing module is further configured to:
- the processing module is further configured to:
- the RRC connection of the UE is released.
- any one of the first to the third possible implementation manners of the second aspect in a fourth possible implementation manner of the second aspect, is further configured to:
- the RRC connection of the UE is released.
- any one of the first to fourth possible implementation manners of the second aspect in a fifth possible implementation manner of the second aspect, is further configured to:
- the state of the cell covered by the access network device is set to a reserved state, and the reserved state is used to prohibit access of the UE in an idle state.
- a third aspect of the present invention provides an access network device, including: a processor, a memory, an interface circuit, and a system bus, where the processor, the memory, and the interface circuit are connected through the system bus and complete communication with each other;
- the memory is configured to store a computer execution instruction
- the interface circuit is configured to communicate with other devices
- the processor for executing the computer executing instructions, performing the method of any of the first to fifth possible implementations of the first aspect of the invention and the first aspect.
- a fourth aspect of the present invention provides a communication system, including: an access network device and a core network device, where the core network device includes a first core network element and a second core network element, where the access network device and The first core network network element has a control plane interface, and the access network device and the second core network network element have a user plane interface;
- the access network device has a structure as provided by the second aspect above, or any possible implementation of the second aspect.
- the data transmission method, the access network device, and the communication system provided by the embodiments of the present invention are applied to a communication system in which a control plane and a user plane are separated, and the communication system includes an access network device and a CN device, and the CN device includes A CN network element and a second CN network element, the first CN network element and the access network device have a control plane interface, and the second CN network element and the access network device have a user plane interface.
- the access network device obtains the bearer information to be established from the first CN network element through the control plane interface, and establishes a bearer according to the bearer information to be established, and notifies the bearer established by the first CN network element
- the second CN network element utilizes, when the control plane interface signal is interrupted, the access network device uses the already established bearer to transmit data to be transmitted in the existing service of the UE.
- the access network device does not immediately release the bearer of the UE, so that the user plane connection of the UE is not disconnected, and the UE can continue to use the established bearer for data transmission to maximize The limit guarantees that the user's face business is not interrupted, thereby improving the user experience.
- 1 is a schematic diagram of a system architecture of an existing LTE network
- FIG. 3 is a 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 another embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of an access network device according to an embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of another access network device according to an embodiment of the present disclosure.
- FIG. 7 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
- the eNB when the control plane is interrupted, the eNB immediately releases the Radio Resource Control (RRC) connection of all the UEs on the S1 link. It can be seen that the interruption of the control plane connection causes the user service to be immediately Interrupt, which affects the user's experience.
- RRC Radio Resource Control
- This application analyzes the process of data transmission, and concludes that the control plane is interrupted, but the user plane bears the established situation. In this case, for the bearer of the established UE, the data can be transmitted continuously, and the conclusion is used to ensure that the user service is not affected to the utmost.
- FIG. 2 is a signaling flowchart of an existing data transmission.
- the process of data transmission of the UE includes the following steps:
- the UE sends a service request (service request) to the MME through the eNB.
- the MME sends an initial context setup request message to the eNB.
- the initial context setup request message may include a UE context and an E-UTRAN radio access bearer (E-RATB) context, where the E-RAB context includes an address of the S-GW for uplink transmission.
- E-RATB E-UTRAN radio access bearer
- Information such as the Tunnel Endpoint Identifier (TEID).
- the eNB learns the radio bearers to be established according to the E-RAB context included in the initial context setup request (hereinafter referred to as a bearer), and allocates radio resources to the bearers, and configures the radio bearers to implement the bearer.
- a bearer the E-RAB context included in the initial context setup request
- the eNB sends the data of the UE to the S-GW by using the established bearer.
- This step exists or does not exist because the UE has uplink data transmission.
- the eNB After the bearer is established, the eNB sends an initial context setup complete message to the MME.
- the initial context setup complete message may carry the address of the eNB, the TEID for downlink transmission, and the information of the established bearer (also referred to as accepted bearer).
- the MME sends a modify bearer request message to the S-GW for the established bearer, so that the information such as the address of the eNB is sent to the S-GW by using the modify bearer request message.
- the S-GW returns a modify bearer response message to the MME, where the address of the S-GW and the TEID used for uplink transmission are carried.
- the control plane and the user plane are separate. It can be seen from the above process that after the connection of the control plane is interrupted, the data can still be transmitted normally through the user plane for the UE that has established the bearer. Based on this, the data transmission method provided by the embodiments of the present invention is in the control plane connection of the UE. After the disconnection, the RRC connection of the UE is not immediately released, so that the service of the UE can continue.
- FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present invention.
- the method is applied to a communication system in which a control plane is separated from a user plane, for example, an LTE network.
- the communication system includes an access network device and a CN device, where the CN device includes a first CN network element and a second CN network element, where the first CN network element is used to process control plane data, and has a control plane with the access network device.
- the interface, the second CN network element is configured to process user plane data, and has a user plane interface with the access network device.
- the method provided in this embodiment may include the following steps:
- the access network device obtains information about the bearer to be established from the first CN network element by using a control plane interface.
- the access network device may obtain the information of the bearer to be established through the initial context setup request message, and the information of the bearer to be established may be an E-RAB context, where the E-RAB context may include the S. - The address of the GW, the TEID for uplink transmission, and the like.
- the access network device establishes a bearer according to the bearer information to be established.
- the access network device sends the data of the UE to the second CN network element by using the established bearer.
- step S303 is performed by the UE having data to be sent. If, after step S302, the UE does not have data to send, the access network device does not need to perform step S303.
- the access network device notifies the second CN network element of the bearer established by the first CN network element.
- the access network device may send the established bearer to the first CN network element by using the initial context setup complete message, and the first CN network element sends the second CN network element by modifying the bearer request message.
- step S303 may not exist, may occur before or after S304, or may be performed simultaneously with S304.
- the access network device uses the established bearer to transmit data to be transmitted in the existing service of the UE.
- the access network device when the control plane interface signaling is interrupted, the access network device does not release immediately.
- the bearer of the UE so that the user plane connection of the UE is not disconnected, and the UE can continue to use the already established bearer for data transmission, so as to ensure the user plane service is not interrupted to the utmost, thereby improving the user experience, especially the voice based on IP.
- Over internet protocol (VOIP) service reliability is particularly applicable to the case where the first CN network element exits the service for a short time, for example, the first CN network element performs version replacement, software upgrade, or abnormal reset.
- the access network device in this application refers to a device that accesses a UE to a wireless network, and may be, for example, an eNB in an LTE network, or a base station in a communication system in which other user planes are separated from a control plane.
- the first CN network element is used to process control plane data, for example, may be an MME in an LTE network
- the second CN network element is used to process user plane data, for example, may be an S-GW in an LTE network.
- the detection of the control plane interface signal interruption in the above step S305 can be implemented by the access network device, which can be implemented by detecting the link between the access network device and the first CN network element.
- the eNB detects whether a flow control transmission protocol (SCTP) link between the MME and the MME is faulty.
- SCTP link is the underlying link between the eNB and the MME.
- the SCTP link can carry control plane connections of multiple UEs. When the SCTP link fails, the control plane connections of all UEs carried on the SCTP link are disconnected.
- SCTP flow control transmission protocol
- the eNB is configured to detect whether the SCTP link between the MME and the MME is faulty.
- the eNB periodically detects the heartbeat packet sent by the MME. If the eNB does not receive the heartbeat packet sent by the MME within the set time, the eNB determines the SCTP. The link is faulty. Of course, the eNB can send a heartbeat packet to the MME. If the MME does not receive a reply within the preset time, the SCTP link is considered to be faulty. This embodiment does not impose any limitation on this, as long as it can detect whether the link can be normally transmitted.
- the control plane connection of the UE consists of two parts: an air interface connection between the UE and the eNB, and an S1-MME connection between the eNB and the MME, and an air interface connection between the UE and the eNB, that is, an RRC connection, and an SCTP chain.
- an air interface connection between the UE and the eNB is, an RRC connection, and an SCTP chain.
- the user plane connection of the UE also includes two parts: an air interface connection between the UE and the eNB, and a connection between the eNB and the S-GW.
- the eNB if the eNB detects that the SCTP link is faulty, the eNB does not release the RRC connection of the UE that is carried on the SCTP link, so that the user plane connection of the UE is not disconnected, and the UE may In order to continue to use the user plane resources for data transmission, the user service is not interrupted, where the user plane resource refers to the bearer established between the eNB and the S-GW.
- a first timer can be set, which can be called an inactivity timer.
- the inactivity timer is used to record the time when the UE is inactive.
- the access network device can monitor whether the UE sends or receives data, if the UE has not sent and received data, and the duration reaches the duration of the inactivity timer.
- the access network device can actively release the UE.
- the initiation of the inactivity timer is initiated by the UE having data transmission or reception.
- the access network device can start the timer when receiving uplink or downlink data of the UE.
- the duration setting of the inactivity timer can be set in advance according to needs. The following factors can be considered when setting:
- the setting of the inactivity timer duration can consider the above two points, and balance in it. Moreover, for data services and voice services, timers of different durations can be set to meet the different needs of the two services.
- the access network device can release all UEs on the S1 link when the control plane interface signal returns to normal, that is, release the RRC connection of the UE. For example, when the eNB detects that the underlying SCTP link state of the S1-MME is restored to normal, all the UEs on the S1 link are released, and the initial UE state on the MME is consistent.
- the inactivity timer expires and the control plane interface signal returns to normal
- the UE's RRC connection can be released when any of the conditions are met. For example, when the control plane interface signal returns to normal before the inactivity timer expires, the RRC connection may be released when the control plane interface signal returns to normal; when the control plane interface signal does not return to normal before the inactivity timer expires, then The RRC connection of the UE may be released when the inactivity timer expires.
- the state of the cell covered by itself can be set to a reserved state. This state is used to disable UE access in the idle state. In this way, the abnormality caused by the control plane signaling transmission caused by the idle state UE access can be avoided.
- a second timer is set.
- the second timer is used to record the time of the control plane signaling interruption, and controls the time to not exceed the preset duration.
- the second timer is started when the control plane interface signal is interrupted.
- the access network device releases all UEs on the S1 link, that is, releases the RRC connection of the UE.
- the duration of the second timer can be set according to the needs of the operator.
- the foregoing embodiments provide various conditions for releasing the UE, for example, the active timer expires and the control plane interface signal returns to normal; for example, the second timer expires and the UE initiates a control plane connection for establishing a new service. .
- These conditions may be used alone or in combination.
- any one of the conditions is preferentially satisfied, and when the condition is satisfied, the RRC connection is released to the UE.
- the control plane interface signal is restored to normal and the second timer expires.
- the two conditions are used to control the access network device to release all UEs on the S1 link, and the active timer expires and the UE initiates establishment of a new service.
- the control plane connects these two conditions for controlling the access network device to release the associated UE.
- FIG. 4 is a flowchart of a data transmission method according to another embodiment of the present invention. As shown in FIG. 4, the method in this embodiment may include the following steps:
- the access network device obtains information about the bearer to be established from the first CN network element, and establishes a bearer according to the bearer information to be established.
- the access network device detects whether the control plane interface signal between the first CN network element and the first CN network element is interrupted.
- control plane interface signal is not interrupted, normal data transmission can be performed, which is prior art and is not related to the essence of the present invention and will not be described here.
- control plane interface signal is detected
- the access network device does not release the RRC connection of the UE, so as to keep the services of the UE continuous, and perform the following operations:
- the access network device starts a second timer.
- S404 may occur simultaneously with S403, or may occur after S403.
- the access network device when detecting that the control plane interface signal is interrupted, the access network device starts a second timer, where the duration of the second timer is used to indicate the maximum duration of the RRC connection of the UE when the control plane interface signal is interrupted.
- the access network device will release the RRC connection of the UE, and the user plane connection of the UE is disconnected.
- the access network device detects whether the duration of the first timer of the UE is up.
- step S406 is performed. If the duration of the first timer of a certain UE expires, step S406 is performed. If the UE has no data to be transmitted, the UE performs the above step S404. That is, the data to be transmitted in the existing service of the UE is transmitted by using the established bearer.
- the first timer of each UE is started when the access network device receives the uplink or downlink data of each UE, and the access network device receives the uplink or downlink data of a certain UE each time.
- the first timer of the UE is reset, after which the access network device constantly monitors whether each UE has data transmission or reception.
- the access network device If a UE sends or receives data within the duration of the first timer, the access network device resets the first timer of the UE, and the first timer restarts timing. If a UE has no data transmission and reception, and the duration reaches the duration of the first timer of the UE, the access network device releases the RRC connection of the UE.
- the duration setting of the first timer of each UE should be reasonable. If the duration of the first timer is set to be smaller, the UE is not released, and the RRC connection of the UE is released earlier, which may result in The UE frequently initiates an RRC connection setup request, but the number of normal releases of the RRC connection of the UE increases, and the network performance indicators such as the dropped call rate of the system are better. If the duration of the first timer is set to be larger, the RRC connection of the UE is released later when the UE has no service, and the UE maintains a longer online time and occupies the radio resource, but the RRC connection of the UE is normal. The number of releases is reduced, and the network performance indicators such as the system dropped call rate will be worse. Therefore, when setting the duration of the first timer, different settings can be set according to different service needs. duration.
- the access network device releases an RRC connection of the UE whose first timer expires.
- the eNB detects that the first timer of any one of the UEs times out, the eNB releases the RRC connection of the UE.
- the first timer of the UE may be due to the fact that the UE does not have a service transmission, and may also be caused by the UE actively retiring the network.
- the UE actively disconnects from the network, that is, the UE is shut down or the UE is switched to the flight mode.
- the UE exits the network the UE triggers the detachment of the non-access stratum (NAS).
- NAS non-access stratum
- whether the time length of the first timer of each UE is time-out is a condition for the RRC connection release of each UE, and the RRC connection of the UE is released, that is, released, in time when the UE has no service.
- the radio resources occupied by the UE avoid the waste of radio resources.
- the access network device detects whether the interface signal of the control plane returns to normal.
- step S408 is performed.
- the control plane interface signal is not restored, when the existing service of the UE still has data to be transmitted, the foregoing step S404 is performed, that is, the established bearer is used to transmit the signal.
- the UE has data to be transmitted in the service.
- the access network device releases an RRC connection of all UEs on the S1 link.
- the access network device After the access network device starts the second timer, it performs the following step S409.
- the access network device detects whether the duration of the second timer expires.
- step S408 is performed. If the duration of the second timer expires, step S408 is performed. If the duration of the second timer does not expire, then when the UE has existing services and data to be transmitted, the foregoing step S404 is performed, that is, the The established bearer transmits data to be transmitted in the existing service of the UE. In this embodiment, by setting the second timer, the UE maintains the time for the user plane to connect after the control plane interface signal is interrupted.
- the state of the UE is inconsistent with the first CN device on the access network device, and the access network device appears that the UE is still in the connected state, and the access network device still The information of the UE is saved. However, when the first CN device sees that the UE has been disconnected, the UE is in an idle state, and the information of the UE saved on the first CN device will be deleted. In this embodiment, after the access network device detects that the control plane interface signal is restored to normal, the access network device releases the S1 link on the S1 link. RRC connection of the UE.
- the access network device considers whether to release the RRC connection of the UE according to conditions such as the duration of the first and second timers and whether the control plane interface signal returns to normal.
- the access network device may also determine whether to release the RRC connection of the UE according to any one of the conditions. For example, the access network device detects whether the control plane interface signal returns to normal. If the access network device detects that the control plane interface signal returns to normal, the access network device releases the RRC connection of the UE. Alternatively, the access network device detects whether the duration of the second timer expires, and if the access network device detects that the duration of the second timer expires, the RRC connection of the UE is released.
- the state of the cell that is covered by the access network is set to a reserved state, where the reserved state is used to prohibit the UE in the idle state from accessing the coverage of the access network device.
- the access network device cannot establish a control plane connection with the first CN device, and the idle state UE cannot access the cell covered by the access network device.
- the access network device sets the state of the cell covered by itself to the reserved state. When the UE in the idle state acquires the state of the cell as the reserved state, the UE in the idle state will not attempt to access the cell, but select other cell access.
- the access network device before the control plane interface signal returns to normal, if any UE initiates a control plane connection for establishing a new service, the access network device needs to establish a control plane connection and a user plane connection for the new service of the UE. Since the control plane interface signal has not returned to normal, the access network device cannot establish a control plane connection with the first CN device, and therefore, the new service of the UE cannot obtain the service. In this embodiment, in order to enable the new service of the UE to obtain the service, the access network device releases the RRC connection of the UE, so that the UE accesses the network through the other access network device and the first CN device, thereby not affecting the New business of the UE.
- FIG. 5 is a schematic structural diagram of an access network device according to an embodiment of the present disclosure, where the access is performed
- the network device 500 is applied to a communication system, the communication system comprising the access network device 500 and a core network device, the core network device comprising a first CN network element and a second CN network element, wherein the access network
- the device 500 has a control plane interface with the first CN network element, and the access network device 500 and the second CN network element have a user plane interface.
- the access network device 500 provided in this embodiment includes: a processing module 51 and a sending module 52.
- the processing module 51 is configured to obtain information about the bearer to be established from the first CN network element by using the control plane interface.
- the processing module 51 is further configured to establish a bearer according to the information about the bearer to be established;
- the sending module 52 is configured to notify, by using the first CN network element, the established bearer to the second CN network element;
- the sending module 52 is further configured to: when the control plane interface signal is interrupted, use the established bearer to transmit data to be transmitted in the existing service of the user equipment UE.
- the processing module 51 is further configured to: when the access network device receives the data of the UE, start or reset a first timer, where the first timer is used to record the The inactivity duration of the UE; when the first timer expires, the RRC connection of the UE is released.
- the processing module 51 is further configured to: detect whether the control plane interface signal returns to normal; when the control plane interface signal returns to normal, release the RRC connection of the UE.
- the processing module 51 is further configured to: when the control plane interface signal is interrupted, start a second timer; when the second timer expires, release an RRC connection of the UE.
- the processing module 51 is further configured to: when the control plane interface signal returns to normal, when the UE initiates a control plane connection for establishing a new service, releasing the RRC connection of the UE.
- the processing module 51 is further configured to: when the control plane interface signal is interrupted, set a state of a cell covered by the access network device to a reserved state, where the reserved state is used to disable an idle state UE. Access.
- the processing module 51 in this embodiment may be a separately set processor, or may be implemented in one processor of the access network device, or may be stored in the form of program code. In the memory of the network device, the function of the above processing module 51 is invoked and executed by a certain processor of the access network device.
- the processor described herein may be a central processing unit (CPU) or a specific integrated circuit (Application) Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
- the sending unit 52 in this embodiment may be a transmitter of the access network device, or may be a transceiver of the access network device, and the transceiver integrates the sending function and the receiving function.
- the access network device in this embodiment may be used to perform the data transmission method provided in the foregoing embodiment.
- the specific implementation manners and technical effects are similar.
- FIG. 6 is a schematic structural diagram of another access network device according to an embodiment of the present invention.
- the access network device 600 is applied to a communication system, where the communication system includes the access network device 600 and a core.
- a network device where the core network device includes a first CN network element and a second CN network element, where the access network device 600 and the first CN network element have a control plane interface, and the access network device There is a user plane interface between the 600 and the second CN network element.
- the access network device 600 provided in this embodiment includes: a processor 61, a memory 62, an interface circuit 63, and a system bus 64.
- the processor 61, the memory 62, and the interface circuit 63 pass through the system bus. 64 connects and completes communication with each other; the memory 62 is for storing computer execution instructions; the interface circuit 63 is for communicating with other devices.
- the processor 61 is configured to:
- the bearer is established according to the bearer information to be established;
- the established bearer transmits data to be transmitted in the existing service of the user equipment UE.
- the processor 61 is further configured to release the RRC connection of the UE when it is determined that any one of the following release conditions is satisfied or the combination of any release conditions is satisfied, as follows:
- the first timer is started or reset, where the first timer is used to record the inactivity duration of the UE; when the first timer is used Upon time, the radio resource control RRC connection of the UE is released.
- the second timer is started; when the second timer expires, the RRC connection of the UE is released.
- the RRC connection of the UE is released.
- the state of the cell covered by the access network device 600 is set to a reserved state, and the reserved state is used to prohibit access of the UE in an idle state.
- the processor 61 in this embodiment may be a processor or a collective name of multiple processing elements.
- the processor 61 may be a CPU, an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more digital singnal processors (DSPs). Or, one or more Field Programmable Gate Arrays (FPGAs).
- DSPs digital singnal processors
- FPGAs Field Programmable Gate Arrays
- the memory 62 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for operation of the access network device.
- the memory 63 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.
- the system bus 64 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
- ISA Industry Standard Architecture
- PCI Peripheral Component
- EISA Extended Industry Standard Architecture
- the system bus 64 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 6, but it does not mean that there is only one bus or one type of bus.
- the access network device in this embodiment may be used to perform the data transmission method provided in the foregoing embodiment.
- the specific implementation manners and technical effects are similar.
- FIG. 7 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
- the communication system provided in this embodiment includes: an access network device 71 and a core network device 72, and the core network device 72 includes a first a CN network element 721 and a second CN network element 722, wherein the access network device 71 and the first CN network element 721 have a control plane interface, and the access network device 71 and the second CN network There is a user plane interface between the elements 722.
- the access network device 71 can be used to perform the above implementation For the data transmission method provided by the embodiment, the specific implementation manner and the technical effect are similar. Please refer to the description of the foregoing embodiment, and details are not described herein again.
- the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
- the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
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Abstract
Description
Claims (14)
- 一种数据传输方法,所述方法用于通信系统中,所述通信系统包括接入网设备和核心网设备,所述核心网设备包括第一核心网网元和第二核心网网元,其中所述接入网设备与所述第一核心网网元之间具有控制面接口,所述接入网设备与所述第二核心网网元之间具有用户面接口,其特征在于,包括:所述接入网设备通过所述控制面接口从所述第一核心网网元获取需建立的承载的信息;所述接入网设备根据所述需建立的承载的信息建立承载;所述接入网设备通过所述第一核心网网元将建立的承载通知给所述第二核心网网元;当所述控制面接口信号中断时,所述接入网设备利用所述建立的承载传输用户设备UE已有业务中待传输的数据。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:所述接入网设备接收到所述UE的数据时,启动或重置第一定时器,其中,所述第一定时器用于记录所述UE的不活动时长;当所述第一定时器到时时,所述接入网设备释放所述UE的无线资源控制RRC连接。
- 根据权利要求1或2所述的方法,其特征在于,所述方法还包括:所述接入网设备检测所述控制面接口信号是否恢复正常;当所述控制面接口信号恢复正常时,所述接入网设备释放所述UE的RRC连接。
- 根据权利要求1至3中任一项所述的方法,其特征在于,所述方法还包括:当所述控制面接口信号中断时,所述接入网设备启动第二定时器;当所述第二定时器到时时,所述接入网设备释放所述UE的RRC连接。
- 根据权利要求1-4中任一项所述的方法,其特征在于,在所述控制面接口信号恢复正常之前,当所述UE发起建立新业务的控制面连接时,所述接入网设备释放所述UE的RRC连接。
- 根据权利要求1-5中任一项所述的方法,其特征在于,所述方法还 包括:当所述控制面接口信号中断时,所述接入网设备设置自身覆盖的小区的状态为保留状态,所述保留状态用于禁止空闲态的UE接入。
- 一种接入网设备,所述接入网设备应用于通信系统中,所述通信系统包括所述接入网设备和核心网设备,所述核心网设备包括第一核心网网元和第二核心网网元,其中所述接入网设备与所述第一核心网网元之间具有控制面接口,所述接入网设备与所述第二核心网网元之间具有用户面接口,其特征在于,包括:处理模块,用于通过所述控制面接口从所述第一核心网网元获取需建立的承载的信息;所述处理模块,还用于根据所述需建立的承载的信息建立承载;发送模块,用于通过所述第一核心网网元将建立的承载通知给所述第二核心网网元;所述发送模块,还用于当所述控制面接口信号中断时,利用所述建立的承载传输用户设备UE已有业务中待传输的数据。
- 根据权利要求7所述的接入网设备,其特征在于,所述处理模块还用于:在所述接入网设备接收到所述UE的数据时,启动或重置第一定时器,其中,所述第一定时器用于记录所述UE的不活动时长;当所述第一定时器到时时,释放所述UE的无线资源控制RRC连接。
- 根据权利要求7或8所述的接入网设备,其特征在于,所述处理模块还用于:检测所述控制面接口信号是否恢复正常;当所述控制面接口信号恢复正常时,释放所述UE的RRC连接。
- 根据权利要求7至9中任一项所述的接入网设备,其特征在于,所述处理模块还用于:当所述控制面接口信号中断时,启动第二定时器;当所述第二定时器到时时,释放所述UE的RRC连接。
- 根据权利要求7-10中任一项所述的接入网设备,其特征在于,所述处理模块还用于:在所述控制面接口信号恢复正常之前,当所述UE发起建立新业务的控制面连接时,释放所述UE的RRC连接。
- 根据权利要求7-11中任一项所述的接入网设备,其特征在于,所述处理模块还用于:当所述控制面接口信号中断时,设置所述接入网设备覆盖的小区的状态为保留状态,所述保留状态用于禁止空闲态的UE接入。
- 一种接入网设备,其特征在于,包括:处理器、存储器、接口电路和系统总线,所述处理器、存储器和接口电路通过所述系统总线连接并完成相互间的通信;所述存储器,用于存储计算机执行指令;所述接口电路用于和其他设备进行通信;所述处理器,用于运行所述计算机执行指令,执行如权利要求1至6任一所述的方法。
- 一种通信系统,其特征在于,包括:如权利要求7-12任一项所述的接入网设备和核心网设备,所述核心网设备包括第一核心网网元和第二核心网网元,其中所述接入网设备与所述第一核心网网元之间具有控制面接口,所述接入网设备与所述第二核心网网元之间具有用户面接口。
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CN201580032782.XA CN106465448A (zh) | 2015-03-27 | 2015-03-27 | 数据传输方法、接入网设备和通信系统 |
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EP4346332A3 (en) | 2017-06-19 | 2024-06-12 | Apple Inc. | Separation of control plane and user plane in new radio (nr) systems |
US11265791B2 (en) * | 2017-07-25 | 2022-03-01 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Reducing a data transmission delay of a terminal device in a handover process |
SG11202103471WA (en) | 2018-10-15 | 2021-05-28 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Wireless communication method and device |
TWI698857B (zh) | 2018-11-21 | 2020-07-11 | 財團法人工業技術研究院 | 語音辨識系統及其方法、與電腦程式產品 |
US11717652B2 (en) | 2019-02-26 | 2023-08-08 | White Swell Medical Ltd | Devices and methods for treating edema |
US11931560B2 (en) | 2019-02-26 | 2024-03-19 | White Swell Medical Ltd | Devices and methods for treating edema |
US11793996B2 (en) | 2019-02-26 | 2023-10-24 | White Swell Medical Ltd | Devices and methods for treating edema |
US11660426B2 (en) | 2019-02-26 | 2023-05-30 | White Swell Medical Ltd | Devices and methods for treating edema |
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CN106465448A (zh) | 2017-02-22 |
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