CN109819526B

CN109819526B - Method and device for starting radio resource control suspension program and NB-IoT (NB-IoT) core network system

Info

Publication number: CN109819526B
Application number: CN201811217769.3A
Authority: CN
Inventors: 古建
Original assignee: Guangzhou Hongbei Technology Co ltd
Current assignee: Guangzhou Red Bay Technology Co., Ltd.
Priority date: 2018-10-18
Filing date: 2018-10-18
Publication date: 2021-07-30
Anticipated expiration: 2038-10-18
Also published as: CN109819526A

Abstract

The invention relates to a method and a device for starting a radio resource control suspension program, an NB-IoT core network system, computer equipment and a computer storage medium, wherein the method comprises the following steps: receiving a non-access stratum message sent by a terminal, wherein the non-access stratum message is used for indicating whether data needs to be transmitted on a certain EPS bearer; when a certain EPS bearer needs to transmit downlink data, an indication message is sent to a service gateway, and the indication message carries part of information in the non-access stratum message; and when the time stamp is earlier than the time of the downlink data, receiving feedback information sent by the service gateway, and starting the wireless resource control suspension connection according to the feedback information. According to the method, the radio resource control suspension connection can be started quickly when the MME does not need to transmit data or after the data transmission is finished, so that the waste of resources (such as the reduction of terminal energy consumption) is reduced.

Description

Method and device for starting radio resource control suspension program and NB-IoT (NB-IoT) core network system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for starting a radio resource control suspended program, an NB-IoT core network system, a computer device, and a computer storage medium.

Background

With the continuous development of communication technology, the Narrow-Band Internet of Things (NB-IoT) based on cellular becomes an important branch of the Internet of everything, and is widely applied in 4G communication systems. The NB-IoT generally includes five components, namely, a terminal (UE), a base station (Evolved Node B, eNodeB), a Core Network (EPC), a platform, and an application server, where the Core Network (EPS) includes a Mobility Management Entity (MME), a Service Capability Exposure Function (SCEF), a Serving gateway (Serving GW, SGW), and a Packet Data Network gateway (PGW), where the Packet Data gateway is also called PDN gateway, and the terminal completes related communications through the base station and the Core Network.

Aiming at the demand characteristics of the service of the Internet of things, two optimization schemes are defined in an NB-IoT core network: CIoT evolved packet system User Plane EPS optimization (UP mode) and CIoT Control Plane function optimization (Control Plane CIoT EPS optimization (CP mode)). The wireless communication process can be simplified in both the UP mode and the CP mode, so that the use of the communication band and the energy consumption of the terminal are reduced, and the data transmission efficiency is improved.

For CP mode, since small packets are transmitted over the control plane, S1-U interfaces, control messages on the air interface and related to bearer services (e.g., set-up service, release service, modify service, etc.) are omitted. In addition, Data is encapsulated in a control plane signaling message in a format of a Non-Access Stratum (NAS) Protocol Data Unit (PDU) for transmission. Therefore, the control plane signaling overhead can be reduced while data is transmitted, so that the power consumption of the terminal can be reduced and the use of frequency bands can be reduced.

For the UP mode, a "suspend/resume" procedure of Radio Resource Control (RRC) is mainly introduced, which reduces signaling overhead of the terminal repeatedly performing network access. When there is no Data traffic between the terminal and the network, the network sets the terminal in a suspended state, but the original connection configuration Data, including the configuration of a Signaling Radio Bearer (SRB), the configuration of a Data Radio Bearer (DRB), and the security configuration of an Access Stratum (AS), are still retained in the terminal and the network. When the terminal re-initiates the service, the original configuration data can immediately recover the communication connection, thereby omitting the processes of re-configuring RRC, verifying safety and the like, and reducing the signaling interaction amount on the wireless air interface.

Currently, in the UP mode, when performing a suspend procedure for RRC, it is mainly used whether a base station transmits uplink and downlink data during an inactivity time (inactivity time), and when the inactivity time is exceeded, the suspend procedure for RRC is immediately started. However, since the rest time is set by the base station, too long rest time increases energy consumption (e.g., power consumption) of the terminal, and too short rest time is not favorable for data transmission, which may not solve the problem of energy consumption and data transmission.

Disclosure of Invention

Based on this, it is necessary to provide a method and an apparatus for starting a rrc suspend procedure, an NB-IoT core network system, a computer device, and a computer storage medium, for solving the problem that the current method for starting the rrc suspend procedure cannot solve the power consumption and data transmission.

A starting method of radio resource control suspended connection includes the following steps:

receiving a non-access stratum message sent by a terminal, wherein the non-access stratum message is used for indicating whether data needs to be transmitted on a certain EPS bearer or not, and the data comprises uplink data and/or downlink data;

when a certain EPS bearer needs to transmit downlink data, sending an indication message to the serving gateway, wherein the indication message carries part of information in the non-access stratum message, and the indication message is used for indicating the serving gateway to compare a time stamp corresponding to release auxiliary indication information in the non-access stratum message with the time of receiving the downlink data at last, and judging whether to start radio resource control to suspend connection according to a comparison result;

and when the time stamp is earlier than the time of the downlink data, receiving feedback information sent by the service gateway, and starting the radio resource control suspension connection according to the feedback information.

The starting method of the radio resource control suspension connection comprises the steps that firstly, a receiving terminal sends a non-access layer message, the non-access layer message is used for telling a mobility management entity (namely MME) whether data needs to be transmitted on a certain EPS bearer, when downlink data needs to be transmitted on the certain EPS bearer, an indication message is sent to a service gateway, the indication message carries part of information in the non-access layer message, after the service gateway receives the indication message, a timestamp corresponding to release auxiliary indication information in the non-access layer message is compared with the time of receiving the downlink data at the last time, and the information is fed back when the timestamp is earlier than the time of the downlink data; and after receiving the feedback information, starting the radio resource control suspension connection. According to the method, the radio resource control suspended connection can be started quickly when the MME does not need to transmit data or after the data transmission is finished, so that the waste of resources (such as the reduction of energy consumption of the terminal) is reduced.

In one embodiment, the indication message is a request for releasing an access bearer, the request for releasing the access bearer carries part of information in the non-access stratum message, and the request for releasing the access bearer is used to indicate the serving gateway to compare a timestamp corresponding to release auxiliary indication information in the non-access stratum message with the time of last receiving downlink data, and when the timestamp is earlier than the time of the downlink data, the serving gateway releases base station information related to the terminal; the step of receiving the feedback information sent by the service gateway and starting the radio resource control suspension connection according to the feedback information comprises the following steps:

receiving a release access bearer response fed back by the service gateway after the base station information related to the terminal is released according to the release access bearer request;

sending a terminal content suspension request to the base station according to the access bearer release response, wherein the terminal content suspension request is used for indicating the base station to suspend terminal content, logic S1 connection and related bearer content;

receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection, and the related bearer content;

feeding back suspension completion information to the base station, wherein the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal, so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

In one embodiment, the indication message is an S11-C control message; the step of receiving the feedback information sent by the service gateway and starting the radio resource control suspension connection according to the feedback information comprises the following steps:

receiving an access bearer releasing request sent by the serving gateway, and feeding back an access bearer releasing response to the serving gateway according to the access bearer releasing request, wherein the access bearer releasing response is used for indicating the serving gateway to release the base station information related to the terminal;

sending a terminal content suspension request to the base station, wherein the terminal content suspension request is used for indicating the base station to suspend terminal content, logic S1 connection and related bearing content according to the terminal content;

receiving an S11-C control message response fed back by the service gateway;

sending a request for releasing an access bearer to the serving gateway, wherein the request for releasing the access bearer is used for indicating the serving gateway to release the base station information related to the terminal;

receiving a release access bearer response sent by the serving gateway, and sending a terminal content suspension request to the base station according to the release access bearer response, where the terminal content suspension request is used to instruct the base station to suspend terminal content, logic S1 connection, and related bearer content;

In one embodiment, the method further comprises the following steps:

and if the time stamp is later than the time of the downlink data, waiting for the next downlink data.

In one embodiment, the method further comprises the following steps:

if uplink data and downlink data are not required on the certain EPS bearer, sending an access bearer releasing request to the serving gateway, wherein the access bearer releasing request is used for indicating the serving gateway to release base station information related to the terminal;

Based on the starting method of the radio resource control suspension connection, a starting device of the radio resource control suspension connection is also provided.

An apparatus for initiating a radio resource control suspended connection, comprising:

a message receiving module, configured to receive a non-access stratum message sent by a terminal, where the non-access stratum message is used to indicate whether data needs to be transmitted on a certain EPS bearer, and the data includes uplink data and/or downlink data;

an indication message sending module, configured to send an indication message to the serving gateway when the certain EPS bearer needs to transmit downlink data, where the indication message carries part of information in the non-access stratum message, and the indication message is used to indicate the serving gateway to compare a timestamp corresponding to release auxiliary indication information in the non-access stratum message with a time when the downlink data is received last, and determine whether to start radio resource control suspension connection according to a comparison result;

a feedback information receiving module, configured to receive feedback information sent by the serving gateway when the timestamp is earlier than the time of the downlink data;

and the radio resource control suspended connection starting module is used for starting the radio resource control suspended connection according to the feedback information.

The above starting apparatus for rrc suspended connection adopts the above starting method for rrc suspended connection, so that the rrc suspended connection can be started quickly without data transmission on the MME or after data transmission is completed, thereby reducing waste of resources (e.g., reducing energy consumption of the terminal).

Based on the starting method and the starting device for the radio resource control suspended connection, an NB-IoT core network system is further provided.

An NB-IoT core network system comprises a terminal, a base station, a mobility management entity, a service gateway and a packet data network gateway which are connected in sequence, wherein the mobility management entity can execute the starting method of the radio resource control suspension connection.

Because the NB-IoT core network system adopts the above-described method for starting the radio resource control suspended connection, the radio resource control suspended connection can be quickly started when the MME does not need to transmit data or after data transmission is completed, thereby reducing waste of resources (e.g., reducing energy consumption of the terminal).

A computer device is also provided based on the starting method and device for the radio resource control suspended connection and the NB-IoT core network system.

A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of initiating a radio resource control suspended connection as described above when executing the computer program.

The computer device realizes that the radio resource control suspended connection is started quickly when the MME does not need to transmit data or after the data transmission is finished through the computer program running on the processor, so that the waste of resources (such as the reduction of terminal energy consumption) is reduced.

Based on the starting method and device for the radio resource control suspended connection, the NB-IoT core network system and the computer equipment, a computer storage medium is also provided.

A computer storage medium having stored thereon a computer program which, when executed by a processor, implements the method of initiating a radio resource control suspended connection as described above.

The computer storage medium stores a computer program, so that the radio resource control suspended connection is started quickly when the MME does not need to transmit data or after data transmission is completed, thereby reducing waste of resources (e.g., reducing energy consumption of the terminal).

Drawings

Fig. 1 is a schematic structural diagram of an NB-IoT network architecture of the present invention;

FIG. 2 is a block diagram of a method for initiating a RRC suspend connection according to one embodiment of the present invention;

FIG. 3 is a block diagram of a method for initiating a RRC suspend connection according to one embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a terminal-initiated user function optimization mode in one embodiment of the present invention;

FIG. 5 is a flow chart illustrating a method for initiating a RRC suspend connection according to one embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a terminal-initiated user function optimization mode in one embodiment of the present invention;

FIG. 7 is a block diagram of a method for initiating a RRC suspend connection according to one embodiment of the present invention;

FIG. 8 is a structural schematic diagram in one embodiment of a terminal initiated optimization mode employing user functionality;

FIG. 9 is a schematic diagram of a terminal-initiated architecture for one embodiment of the present invention in a user function optimization mode;

fig. 10 is a schematic structural diagram of an apparatus for initiating an rrc suspended connection according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to preferred embodiments and the accompanying drawings. It is to be understood that the following examples are illustrative only and are not intended to limit the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. It should be noted that, for the convenience of description, only some but not all of the matters related to the present invention are shown in the drawings.

The terms "comprising" and "having" and any variations thereof in embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or (module) elements is not limited to the listed steps or elements, but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated object, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Fig. 1 is a schematic structural diagram of an NB-IoT network architecture in an embodiment of the present invention, where the NB-IoT network architecture includes a terminal (UE), a base station (eNodeB), a Mobility Management Entity (MME), a Serving Gateway (SGW), and a packet data network gateway (PGW), where the Mobility Management Entity (MME), the Serving Gateway (SGW), and the packet data network gateway (PGW) also become a core network (EPC), the terminal is connected to the base station through an air interface, and the EPC performs a function of interacting with a non-access stratum of the terminal. A Mobility Management Entity (MME) which is accessed to a key control node of a network and is responsible for the tracking and paging control of the idle mode UE, and completes the user authentication function through the information exchange with a Home Subscriber Server (HSS); a Serving Gateway (SGW) responsible for routing and forwarding user data packets, the SGW being the end point of a downlink data path for idle UE and triggering paging of the UE when downlink data arrives; a packet data network gateway (PGW), also called PDN gateway, provides interface transmission between the UE and an external packet data network connection point, and performs service uplink and downlink service level charging. The starting method of the radio resource control suspended connection in the embodiment of the invention can be operated in an NB-IoT network architecture. The system architecture is not unique as long as transportation of the network is satisfied.

Fig. 2 is a flowchart illustrating a method for initiating a rrc suspended connection according to an embodiment of the present invention, and as shown in fig. 2, the method for initiating the rrc suspended connection includes the following steps:

step S110, receiving a non-access stratum message sent by the terminal, where the non-access stratum message is used to indicate whether data needs to be transmitted on a certain EPS bearer, and the data includes uplink data and/or downlink data.

Step S120, when a certain EPS bearer needs to transmit a downlink data, an indication message is sent to the serving gateway, the indication message carries part of information in the non-access stratum message, and the indication message is used for indicating the serving gateway to compare a timestamp corresponding to the release auxiliary indication information in the non-access stratum message with the time of the last downlink data reception, and whether to start the radio resource control to suspend connection is judged according to the comparison result.

Step S130, when the timestamp is earlier than the time of the downlink data, receiving feedback information sent by the serving gateway, and starting the radio resource control suspended connection according to the feedback information.

Specifically, in the present embodiment, the description is made from a single-side perspective of a Mobility Management Entity (MME) side. In general, a terminal transmits data information by using a user function optimization mode (UP), which includes the following specific processes: when uplink data on a terminal (UE) needs to be transmitted through user Plane optimization, the UE can initiate a Control panel Service Request message (Control Plane Service Request) to a base station, and the base station sends a Radio Resource Control (RRC) connection recovery message to the terminal for recovering the RRC connection; after the RRC connection is completed, the UE sends uplink data to a Serving Gateway (SGW) and a packet data network gateway (PGW) through a base station, and transmits downlink data to the terminal (UE) along the opposite direction; when the terminal does not need to transmit data or the terminal only needs to transmit data in a specific form, the terminal sends a Non-Access Stratum (NAS) message to the mobility management entity, where the NAS message generally carries Release Assistance indication Information (RAI), EPS bearer identification Information (EPS bearer ID), and a timestamp (Time stamp), where the Release Assistance indication Information is used to inform the MME whether data needs to be transmitted on a certain EPS bearer, and generally includes several situations that uplink data and downlink data do not need to be transmitted on a certain EPS bearer any more, or several downlink data need to be transmitted after uplink data next Time. The EPS bearer identification information is used for marking or indicating a certain EPS bearer and is used for informing the MME which EPS bearer needs or does not need to transmit data; the timestamp refers to a timestamp corresponding to the RAI information, that is, the timestamp corresponding to the time when the MME receives the RAI information, and the timestamp is not used every time, that is, the timestamp does not appear in pair with the RAI information, and the timestamp is only used when the RAI information indicates that data needs to be transmitted on a certain EPS bearer.

In this embodiment, when receiving RAI information sent by a terminal and determining that downlink data needs to be transmitted on a certain EPS bearer according to the RAI information, an MME sends an indication message to a Serving Gateway (SGW), where the indication message carries part of information in a non-access stratum message, and is used to indicate the serving gateway to compare a timestamp corresponding to release auxiliary indication information with the time of last receiving the downlink data, and determine whether to start radio resource control suspend connection according to a comparison result. The types of the indication information can be various, the indication information carries part of information in the non-access stratum message, when the service gateway receives the indication information, the service gateway compares a time stamp corresponding to the release auxiliary indication information in the indication information with the time of receiving the downlink data at last, when the time stamp is earlier than the time of the downlink data, the service gateway sends feedback information to the MME, and the MME starts the radio resource control to suspend connection according to the feedback information. The feedback information type is also diversified, and may be a response message indicating a message or the like in general.

The starting method of the radio resource control suspension connection comprises the steps that firstly, a non-access stratum message sent by a terminal is received, the non-access stratum message is used for telling a mobility management entity (namely MME) whether data needs to be transmitted or not on a certain EPS bearer, when downlink data needs to be transmitted on the certain EPS bearer, an indication message is sent to a service gateway, wherein the indication message carries part of information in the non-access stratum message, after the service gateway receives the indication message, a timestamp corresponding to release auxiliary indication information in the non-access stratum message is compared with the time of receiving the downlink data at last, and information is fed back when the timestamp is earlier than the time of the downlink data; and after receiving the feedback information, starting the radio resource control suspension connection. According to the method, the radio resource control suspended connection can be started quickly when the MME does not need to transmit data or after the data transmission is finished, so that the waste of resources (such as the reduction of energy consumption of the terminal) is reduced.

In one embodiment, the indication message is a request for releasing an access bearer, the request for releasing the access bearer carries non-access stratum information, and the request for releasing the access bearer is used for indicating the serving gateway to compare a timestamp corresponding to the auxiliary indication information for releasing in the non-access stratum message with the time of last receiving downlink data, and when the timestamp is earlier than the time of the downlink data, the serving gateway releases base station information related to the terminal; in the step of receiving the feedback information sent by the serving gateway and starting the radio resource control suspended connection according to the feedback information, as shown in fig. 3, the method includes:

step S131, receiving a release access bearer response fed back by the service gateway after releasing the base station information related to the terminal according to the release access bearer request;

step S132, sending a terminal content suspension request to the base station according to the access bearer release response, wherein the terminal content suspension request is used for indicating the base station to suspend the terminal content, the logic S1 connection and the related bearer content;

step S133, receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection and the related bearing content;

step S134, feeding back a suspension completion message to the base station, where the suspension completion message is used to instruct the base station to send a radio resource control suspension connection request to the terminal, so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

In the present embodiment, the description is made from a Mobility Management Entity (MME) side single-sided perspective. In this embodiment, a Mobility Management Entity (MME) sends an indication message to a serving gateway, where the indication message is an access bearer Release request, and the access bearer Release request carries Release Assistance indication Information (RAI), EPS bearer identification Information (EPS bearer ID), and a timestamp (Time stamp) corresponding to the Release Assistance indication Information. The release auxiliary indication information is used for telling that the service gateway needs a downlink data on the terminal (namely the service gateway needs to transmit a downlink data), the service gateway compares a timestamp corresponding to the release auxiliary indication information with the time of receiving the downlink data at last, when the timestamp is earlier than the time of the downlink data, the service gateway releases base station information related to the terminal and replies a release access bearer response to the MME, the MME receives the release access bearer response and then sends a terminal content suspension request to the base station, and the base station suspends the terminal content, the logic S1 connection and the related bearer content according to the terminal content suspension request; after the base station completes the content, the terminal content suspension response is fed back to the MME, and then the MME suspends the terminal content, the logical S1 connection and the related bearer content. After the MME finishes hanging, hanging completion information is fed back to the base station, the base station sends a wireless resource control hanging connection request to the terminal according to the hanging completion information, and the terminal starts the wireless resource control hanging connection according to the wireless resource control hanging connection request. The types of the suspension completion information are various, and are mainly used for informing the base station that the MME has completed suspending the terminal content, the logic S1 connection, and the related bearer content. The access bearer releasing request is used as the indication message, namely, part of information in the non-access layer message is carried in the access bearer releasing request, so that the transmission is very convenient, and in addition, the indication message does not need to be transmitted separately, so that the data transmission is reduced.

To facilitate a better understanding of the invention, a more detailed example is given. As shown in fig. 4, a method for starting a radio resource control suspended connection includes: the UE starts in RRC-idle state. When the UE has uplink IP Data to be transmitted through the user Plane optimization, the UE may initiate a Control Plane Service Request message (CP-SR), which carries a Service type of a terminal initiating Request (mobile authorization Request) and the activation identifier is 1. The CP-SR does not include the association data, and the terminal transmits an RRC Connection Resume Request message (RRC Connection Resume Request) to Resume the RRC Connection. 42. The base station sends an RRC connection recovery message to the terminal. The UE replies to the eNodeB with an RRC Connection Resume Complete message (RRC Connection Resume Complete), the CP-RS being contained in the NAS PDU contained therein. CP-RS encapsulation is sent to the MME by the eNodeB in an Initial UE Message (Initial UE Message). 45.MME resolves CP-RS knowing that UE will use user plane function optimization mode to transmit data, MME sends Modified Bearer Request message (Modified Bearer Request) to SGW for restoring connection of S1-U. SGW returns a Modified Bearer Response message (Modified Bearer Response). The MME sends an Initial content Setup Request message (Initial Context Setup Request) to the eNodeB for triggering the restoration of the S1-U connection. The eNodeB replies to the Initial content Setup Response message (Initial Context Setup Response). And 49, the UE sends uplink Internet of things data to the PGW through the eNodeB and the SGW, and the downlink data is transmitted to the UE by the network in the opposite direction. 410. When the UE only expects transmission of one piece of downlink data, the UE sends an NAS message to the MME, where the NAS message carries an RAI, a current timestamp (Time stamp), and an EPS bearer ID, and is used to tell the MME that the terminal also expects transmission of one piece of downlink data on a certain EPS bearer, and the NAS message may be implemented by expanding an existing NAS message or defining a new NAS message. After the MME receives the NAS message, if the RAI indicates that the terminal expects a downlink packet, the MME forwards the RAI, the EPS bearer ID, and the timestamp to the SGW. In this embodiment, the EPS bearer ID and the timestamp are carried in the release access bearer request message. And 412, the S-GW receives the request message for releasing the access bearer and finds that the RAI is carried, and the SGW is not anxious to release all the information of the eNodeBs related to the UE. The SGW compares the time of the last downlink data it received with the timestamp corresponding to the RAI. If the time of the last received downlink data is later than the time stamp corresponding to the RAI, the SGW releases all information of the eNodeB related to the UE (such as eNodeB address and downlink teid (tunnel End id)) and replies a Release Access Bearer Response (Release Access Bearer Response) to the MME. Otherwise, the SGW waits for the next downlink packet. And 413, after receiving the response of releasing the access bearer, the MME initiates a UE content suspension Request (UE Context Suspend Request) to the eNodeB, and after receiving the message, the eNodeB suspends the UE content, and the logic S1 connects and associates the bearer content. The eNodeB replies a UE content Suspend Response (UE Context Suspend Response) to the MME, and after receiving the Response, the MME suspends the UE content, and the logic S1 connects and associates the bearer content. And 415, the eNodeB sends an RRC Connection suspension message (RRC Connection Suspend) to the UE to Suspend the RRC Connection after receiving the suspension completion information fed back by the MME. Wherein the Release Assistance Indication (RAI) is used to tell the MME that uplink and downlink data transmission is no longer continued, or that the UE expects only one downlink data transmission following the uplink data transmission.

In one embodiment, the indication message is an S11-C control message; in the step of receiving the feedback information sent by the serving gateway and starting the radio resource control suspended connection according to the feedback information, as shown in fig. 5, the method includes:

step S135, receiving an access bearer releasing request sent by the service gateway, and feeding back an access bearer releasing response to the service gateway according to the access bearer releasing request, wherein the access bearer releasing response is used for indicating the service gateway to release the base station information related to the terminal;

step S136, sending a terminal content suspension request to the base station, wherein the terminal content suspension request is used for indicating the base station to suspend the terminal content according to the terminal content, the logic S1 connection and the related bearing content;

step S137, receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection and the related bearing content;

step S138, feeding back a suspend completion message to the base station, where the suspend completion message is used to instruct the base station to send a radio resource control suspend connection request to the terminal, so that the terminal starts a radio resource control suspend connection according to the radio resource control suspend connection request.

In the present embodiment, the description is made from a Mobility Management Entity (MME) side single-sided perspective. In this embodiment, a Mobility Management Entity (MME) sends an indication message to a serving gateway, where the indication message is an S11-C control message, and the S11-C control message carries Release Assistance indication Information (RAI), EPS bearer identification Information (EPS bearer ID), and a timestamp (Time stamp) corresponding to the Release Assistance indication Information. The release auxiliary indication information is used for telling the serving gateway that a downlink data is needed on the terminal (that is, the serving gateway needs to transmit a downlink data), the serving gateway compares a timestamp corresponding to the release auxiliary indication information with the time of receiving the downlink data at last, when the timestamp is earlier than the time of the downlink data, the serving gateway initiates a request for releasing and receiving the bearer to the MME, the MME replies a response for releasing the access bearer to the serving gateway after receiving the request for releasing the access bearer, and the serving gateway releases all base station information related to the terminal according to the response for releasing the access bearer. The MME initiates a terminal content suspension request to the base station, and the base station suspends the terminal content, the logic S1 connection and related bearing content according to the terminal content suspension request; after the base station finishes the suspension content, the terminal content suspension response is fed back to the MME, and then the MME suspends the terminal content, the logic S1 connection and the related bearer content. After the MME finishes the suspension, the MME feeds back suspension completion information to the base station, the base station sends a radio resource control suspension connection request to the terminal according to the suspension completion information, and the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request. The types of the suspension completion information are various, and are mainly used for informing the base station that the MME has completed suspending the terminal content, the logical S1 connection, and the related bearer content. The S11-C control message is used as the indication message, namely, part of information in the non-access stratum message is carried in the S11-C control message, so that the transmission is very convenient, and in addition, the indication message does not need to be transmitted separately, and the data transmission is reduced.

To facilitate a better understanding of the invention, a more detailed example is given. As shown in fig. 6, a method for starting a radio resource control suspended connection includes: the UE starts in RRC-idle state. 61. when UE has uplink IP Data to be transmitted by user plane optimization, UE can initiate control plane service request message (CP-SR) carrying service type as terminal initiating request (mobile authorization request) and activation identifier is 1. The CP-SR does not include the association data, and the peer sends an RRC Connection Resume Request message (RRC Connection Resume Request) to Resume the RRC Connection. 62. The base station sends an RRC Connection Resume message (RRC Connection Resume) to the terminal. 63. the UE replies to the eNodeB with an RRC Connection Resume Complete message (RRC Connection Resume Complete) in which the CP-RS is contained in the NAS PDU. CP-RS encapsulation is sent to the MME by the eNodeB in an Initial UE Message (Initial UE Message). 65.MME resolves CP-RS knowing that UE will use user plane function optimization mode to transmit data, MME sends Modified Bearer Request message (Modified Bearer Request) to SGW for restoring connection of S1-U. 66.SGW returns a Modified Bearer Response message (Modified Bearer Response). The MME sends an Initial content Setup Request message (Initial Context Setup Request) to the eNodeB for triggering the restoration of the S1-U connection. 68. the eNodeB replies to the Initial content Setup Response message (Initial Context Setup Response). And 69, the UE sends uplink Internet of things data to the PGW through the eNodeB and the SGW, and the downlink data is transmitted to the UE by the network in the opposite direction. 610. When the UE only expects transmission of one downlink data, the UE sends an NAS message to the MME, where the NAS message carries an RAI, a current timestamp (Time stamp), and an EPS bearer ID, and is used to tell the MME that the terminal also expects transmission of one downlink data on a certain EPS bearer. This can be done by extending existing NAS messages or by defining new NAS messages. 611, after the MME receives the NAS message, if the RAI indicates that the terminal expects a downlink packet, the MME forwards the EPS bearer ID and the timestamp to the SGW. In this embodiment, the RAI, EPS bearer ID and timestamp are carried in an S11-C message, where the S11-C message may be an existing S11-C message or a newly defined S11-C message. The S-GW receives the S11-C message, finds that it carries the RAI, and the SGW compares the time of the last downlink data it receives with the timestamp corresponding to the RAI. If the time of the last received downlink data is later than the time stamp corresponding to the RAI, the SGW initiates a Request (Release Access Bearer Request) for releasing the Access Bearer to the MME. Otherwise, the SGW waits for the next downlink packet. And 613, the MME replies a release access bearer response to the SGW after receiving the request for releasing the access bearer. After receiving the message, the SGW releases all information (such as eNodeB address and downlink teid (tunnel End id)) of the eNodeB related to the UE. The MME initiates a UE content Suspend Request (UE Context Suspend Request) to the eNodeB, and after receiving the message, the eNodeB suspends the UE content, and the logic S1 connects and related bearer content. 615, the eNodeB replies UE content Suspend Response (UE Context Suspend Response) to the MME, and after receiving the Response, the MME suspends the UE content, and the logic S1 connects and associates the bearer content. The eNodeB sends an RRC Connection Suspend message (RRC Connection Suspend) to the UE to Suspend the RRC Connection. Wherein the Release Assistance Indication (RAI) is used to tell the MME that the UE expects only one downlink data transmission following the uplink data transmission.

In one embodiment, the indication message is an S11-C control message; in the step of receiving the feedback information sent by the serving gateway and starting the radio resource control suspended connection according to the feedback information, as shown in fig. 7, the method includes:

step S139, receiving an S11-C control message response fed back by the service gateway;

step S1310, sending an access bearer release request to the serving gateway, where the access bearer release request is used to instruct the serving gateway to release base station information related to the terminal;

step S1311, receiving a release access bearer response sent by the service gateway, sending a terminal content suspension request to the base station according to the release access bearer response, where the terminal content suspension request is used to instruct the base station to suspend terminal content, logic S1 connection, and related bearer content;

step S1312, receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection and the related bearer content;

step S1313, feeding back suspension completion information to the base station, where the suspension completion information is used to instruct the base station to send a radio resource control suspension connection request to the terminal, so that the terminal starts radio resource control suspension connection according to the radio resource control suspension connection request.

In the present embodiment, the description is made from a Mobility Management Entity (MME) side single-sided perspective. In this embodiment, a Mobility Management Entity (MME) sends an indication message to a serving gateway, where the indication message is an S11-C control message, and the S11-C control message carries Release Assistance indication Information (RAI), EPS bearer identification Information (EPS bearer ID), and a timestamp (Time stamp) corresponding to the Release Assistance indication Information. The release auxiliary indication information is used for telling the serving gateway that a downlink data is needed on the terminal (that is, the serving gateway needs to transmit a downlink data), the serving gateway compares a timestamp corresponding to the release auxiliary indication information with the time of receiving the downlink data at last, when the timestamp is earlier than the time of the downlink data, the serving gateway sends an S11-C control message response to the MME, then the MME sends a request for releasing an access bearer to the serving gateway, and the serving gateway releases all base station information related to the terminal and feeds back the response for releasing the access bearer to the MME. The MME initiates a terminal content suspension request to the base station after receiving the response of releasing the access bearer, and the base station suspends the terminal content, the logic S1 connection and the related bearer content according to the terminal content suspension request; after finishing the suspension content, the base station feeds back a terminal content suspension response to the MME, and then the MME suspends the terminal content, the logic S1 connection and the related bearer content. After the MME finishes hanging, hanging completion information is fed back to the base station, the base station sends a wireless resource control hanging connection request to the terminal according to the hanging completion information, and the terminal starts the wireless resource control hanging connection according to the wireless resource control hanging connection request. The types of the suspension completion information are various, and are mainly used for informing the base station MME that the contents of the suspended terminal, the logical S1 connection and the related bearer contents have been completed. The S11-C control message is used as the indication message, namely, part of information in the non-access stratum message is carried in the S11-C control message, so that the transmission is very convenient, and in addition, the indication message does not need to be transmitted separately, so that the transmission of data is reduced.

To facilitate a better understanding of the invention, a more detailed example is given. As shown in fig. 8, a method for starting a radio resource control suspended connection includes: 80. the UE begins to be in RRC-idle state. When the UE has uplink IP Data to transmit through the user plane optimization, the UE may initiate a control plane service request message (i.e. CP-SR), which carries a service type of a terminal initiating request (mobile authorization request) and the activation identifier is set to 1. The CP-SR does not contain the Internet of things data. The terminal sends an RRC Connection Resume Request message (RRC Connection Resume Request) to Resume the RRC Connection. 82. The base station sends an RRC Connection Resume message (RRC Connection Resume) to the terminal. The UE replies to the eNodeB with an RRC Connection Resume Complete message (RRC Connection Resume Complete) in which the CP-RS is contained in the NAS PDU. CP-RS encapsulation is sent to the MME by the eNodeB in an Initial UE Message (Initial UE Message). 85. the MME resolves the CP-RS to know that the UE will use the user plane function optimization mode to transmit data. The MME sends a Modified Bearer Request message (Modified Bearer Request) to the SGW for restoring the connection of S1-U. 86.SGW returns a Modified Bearer Response message (Modified Bearer Response). The MME sends an Initial content Setup Request message (Initial Context Setup Request) to the eNodeB for triggering the restoration of the S1-U connection. 88. the eNodeB replies to the Initial content Setup Response message (Initial Context Setup Response). 89. the UE sends uplink data to the PGW via the eNodeB and SGW, and the downlink data is transmitted to the UE by the network in the opposite direction. 810. When the UE only expects transmission of one downlink data, the UE sends an NAS message to the MME, where the NAS message carries an RAI, a current timestamp (Time stamp), and an EPS bearer ID, and is used to tell the MME that the terminal also expects transmission of one downlink data on a certain EPS bearer. This can be done by extending existing NAS messages or by defining new NAS messages. After the MME receives the NAS message, if the RAI indicates that the terminal expects a downlink packet, the MME forwards the RAI, the EPS bearer ID, and the timestamp to the SGW. In this embodiment, the RAI, EPS bearer ID and timestamp are carried in an S11-C message, where the S11-C message may be an existing S11-C message or a newly defined S11-C message. 812. The S-GW receives the request message for releasing the access bearer, finds that the RAI is carried, and the SGW compares the time of the latest received downlink data with the time stamp corresponding to the RAI. If the time of the last received downlink data is later than the time stamp corresponding to the RAI, the SGW returns a response to the MME that the S11-C message carrying the EPS bearer ID and the time stamp is received in the step 11. Otherwise, the SGW waits for the next downlink packet. 813. the MME sends a Release Access Bearer Request (Release Access Bearer Request) to the SGW. The SGW releases all eNodeB information related to the UE (e.g. eNodeB address and downlink teid (tunnel End id)) and replies a Release Access Bearer Response (Release Access Bearer Response) to the MME. 815. after receiving the response of releasing the access bearer, the MME initiates a UE content Suspend Request (UE Context Suspend Request) to the eNodeB, and after receiving the message, the eNodeB suspends the UE content, and the logic S1 connects and associates the bearer content. The eNodeB replies a UE content Suspend Response (UE Context Suspend Response) to the MME, and after receiving the Response, the MME suspends the UE content, and the logic S1 connects and associates the bearer content. The eNodeB sends an RRC Connection Suspend message (RRC Connection Suspend) to the UE to Suspend the RRC Connection. The Release Assistance Indication (RAI) is used to tell the MME that the UE expects only one downlink data transmission following the uplink data transmission.

In one embodiment, the method further comprises the following steps: and if the time stamp is later than the time of the downlink data, waiting for the next downlink data.

Specifically, in the foregoing embodiment, when the timestamp corresponding to the release auxiliary indication information is earlier than the time of the downlink data, the radio resource control suspend connection is started; and when the time stamp corresponding to the auxiliary indication information is released is later than the time of the downlink data, waiting for the next data, and starting the radio resource control suspension connection after the transmission of the next data is finished. The method can quickly start the wireless resource control to suspend connection after the next data transmission is finished, thereby reducing the waste of resources and reducing the energy consumption of the terminal.

In one embodiment, the method further comprises the following steps:

if uplink data and downlink data are not needed on a certain EPS bearer, sending an access bearer releasing request to a service gateway, wherein the access bearer releasing request is used for indicating the service gateway to release base station information related to the terminal;

receiving a release access bearer response sent by the service gateway, and sending a terminal content suspension request to the base station according to the release access bearer response, wherein the terminal content suspension request is used for indicating the base station to suspend terminal content, logic S1 connection and related bearer content;

receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection and the related bearing content;

and feeding back suspension completion information to the base station, wherein the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

In the present embodiment, the description is made from a Mobility Management Entity (MME) side single-sided perspective. Specifically, a non-access stratum message sent by a terminal is received at an MME, where the non-access stratum message includes Release Assistance indication Information (RAI) and EPS bearer identification Information (EPS bearer ID), the Release Assistance indication Information is used to tell the MME that uplink data and downlink data are not desired to be transmitted on a certain EPS bearer, an access bearer Release request is sent to a serving gateway, the serving gateway releases base station Information related to the terminal according to the access bearer Release request, and replies a Release access bearer response to the MME; the MME initiates a terminal content suspension request to the base station after receiving the response of releasing the access bearer, and the base station suspends the terminal content, the logic S1 connection and the related bearer content according to the terminal content suspension request; after finishing the suspension content, the base station feeds back a terminal content suspension response to the MME, and then the MME suspends the terminal content, the logical S1 connection, and the related bearer content. After the MME finishes suspending, the suspending completion information is fed back to the base station, the base station sends a wireless resource control suspending connection request to the terminal according to the suspending completion information, and the terminal starts the wireless resource control suspending connection according to the sending of the wireless resource control suspending connection request. According to the starting method of the radio resource control suspension connection, when the terminal does not need to receive uplink data and downlink data, the radio resource control suspension connection is started quickly, so that the waste of resources is reduced, and the energy consumption of the terminal is reduced.

To facilitate a better understanding of the invention, a more detailed example is given. As shown in fig. 9, a method for starting a radio resource control suspended connection includes: 90. the UE begins to be in RRC-idle state. 91, when the UE has uplink IP Data to transmit through the user Plane optimization, the UE may initiate a Control Plane Service Request message (CP-SR), the carried Service type is a terminal initiating Request (mobile authorization Request), the activation identifier is 1, and the CP-SR does not include the Data of the internet of things. The terminal sends an RRC Connection Resume Request message (RRC Connection Resume Request) to Resume the radio resource control Connection. 92. The base station sends an RRC Connection Resume message (RRC Connection Resume) to the terminal. 93. the UE replies to the eNodeB with an RRC Connection Resume Complete message (RRC Connection Resume Complete), the CP-RS being contained in the NAS PDU contained therein. 94. the CP-RS encapsulation is sent to the MME by the eNodeB in an Initial UE Message (Initial UE Message). 95.MME parses the CP-RS, knows that the UE will use user plane function optimized mode to transmit data, MME sends a Modified Bearer Request message (Modified Bearer Request) to SGW for restoring the connection of S1-U. 96.SGW returns a Modified Bearer Response message (Modified Bearer Response). The MME sends an Initial content Setup Request message (Initial Context Setup Request) to the eNodeB for triggering the restoration of the S1-U connection. 98. the eNodeB replies to the Initial content Setup Response message (Initial Context Setup Response). 99. the UE sends uplink data to the PGW via the eNodeB and SGW, and the downlink data is transmitted to the UE by the network in the opposite direction. 910. And under the condition that the UE does not want to continue uplink and downlink data transmission, the UE sends an NAS message to the MME, wherein the NAS message carries RAI and EPS bearer ID and is used for telling the MME that the uplink and downlink data transmission is not continued on a certain EPS bearer. This can be done by extending existing NAS messages or by defining new NAS messages. 911. after the MME receives the NAS message, if the RAI indicates that no new data is expected anymore, the MME initiates a Release Access Bearer Request (Release Access Bearer Request) to the SGW. The SGW releases all information about the eNodeB associated with the UE (e.g. eNodeB address and downlink teid (tunnel End id)) and replies a Release Access Bearer Response (Release Access Bearer Response) to the MME. MME initiates UE content Suspend Request (UE Context Suspend Request) to eNodeB, eNodeB suspends UE content, logical S1 connection and related bearer content. The eNodeB replies UE content suspension response to the MME, which after receiving the response suspends the UE content, and the logic S1 connects and associated bearer content. The eNodeB sends an RRC Connection Suspend message (RRC Connection Suspend) to the UE to Suspend the RRC Connection.

An apparatus for initiating a radio resource control suspended connection, as shown in fig. 10, includes:

a message receiving module 10, configured to receive a non-access stratum message sent by a terminal, where the non-access stratum message is used to indicate whether data needs to be transmitted on a certain EPS bearer, and the data includes uplink data and/or downlink data;

an indication message sending module 20, configured to send an indication message to the serving gateway when a certain EPS bearer needs to transmit downlink data, where the indication message carries part of information in a non-access stratum message, and the indication message is used to indicate the serving gateway to compare a timestamp corresponding to release auxiliary indication information in the non-access stratum message with the time of last receiving the downlink data, and determine whether to start radio resource control suspension connection according to a comparison result;

a feedback information receiving module 30, configured to receive feedback information sent by the serving gateway when the timestamp is earlier than the time of the downlink data;

and a rrc suspend connection start module 40, configured to start rrc suspend connection according to the feedback information.

In one embodiment, the indication message is a request for releasing access bearer, where the request for releasing access bearer is used to indicate the serving gateway to compare a timestamp corresponding to the auxiliary indication information with the time of last receiving downlink data, and when the timestamp is earlier than the time of the downlink data, the serving gateway releases base station information related to the terminal; the radio resource control suspend connection initiation module includes:

a first release access bearer response receiving module, configured to receive a release access bearer response fed back by a serving gateway after releasing base station information related to a terminal according to a release access bearer request;

a first terminal content suspend request sending module, configured to send a terminal content suspend request to the base station according to a release access bearer response, where the terminal content suspend request is used to instruct the base station to suspend terminal content, logic S1 connection, and related bearer content;

a first terminal content suspension response receiving module, configured to receive a terminal content suspension response sent by the base station, suspend the terminal content, the logic S1 connection, and the related bearer content;

and the first suspension completion information feedback module is used for feeding back suspension completion information to the base station, and the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

In one embodiment, the indication message is an S11-C control message; the radio resource control suspend connection start module comprises:

a first access bearer release request receiving module, configured to receive an access bearer release request sent by a service gateway;

a first release access bearer response feedback module, configured to feed back a release access bearer response to the serving gateway according to the release access bearer request, where the release access bearer response is used to instruct the serving gateway to release base station information related to the terminal;

a second terminal content suspension request sending module, configured to send a terminal content suspension request to the base station, where the terminal content suspension request is used to instruct the base station to suspend the terminal content according to the terminal content, the logic S1 connection, and the related bearer content;

a second terminal content suspend response receiving module, configured to receive a terminal content suspend response sent by the base station, suspend the terminal content, the logic S1 connection, and the related bearer content;

and the second suspension completion information feedback module is used for feeding back suspension completion information to the base station, and the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

the S11-C control message response receiving module is used for receiving an S11-C control message response fed back by the service gateway;

a second release access bearer request sending module, configured to send a release access bearer request to the serving gateway, where the release access bearer request is used to instruct the serving gateway to release base station information related to the terminal;

a second release access bearer response receiving module, configured to receive a release access bearer response sent by the service gateway;

a third terminal content suspend request sending module, configured to send a terminal content suspend request to the base station according to a release access bearer response, where the terminal content suspend request is used to instruct the base station to suspend terminal content, logic S1 connection, and related bearer content;

a third terminal content suspend response receiving module, configured to receive a terminal content suspend response sent by the base station, suspend the terminal content, the logic S1 connection, and the related bearer content;

and the third suspension completion information feedback module is used for feeding back suspension completion information to the base station, and the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

In one embodiment, the method further comprises

And the downlink data waiting module is used for waiting for the next downlink data if the time stamp is later than the time of the downlink data.

In one embodiment, the method further comprises the following steps:

a third access bearer release request sending module, configured to send an access bearer release request to the serving gateway if uplink data and downlink data are not needed on a certain EPS bearer, where the access bearer release request is used to instruct the serving gateway to release base station information related to the terminal;

a third release access bearer response receiving module, configured to receive a release access bearer response sent by the service gateway;

a fourth terminal content suspend request sending module, configured to send a terminal content suspend request to the base station according to a release access bearer response, where the terminal content suspend request is used to instruct the base station to suspend terminal content, logic S1 connection, and related bearer content;

a fourth terminal content suspend response receiving module, configured to receive a terminal content suspend response sent by the base station, suspend the terminal content, the logic S1 connection, and the related bearer content;

and the fourth suspension completion information feedback module is used for feeding back suspension completion information to the base station, and the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

The above-mentioned apparatus for starting a radio resource control suspended connection adopts the above-mentioned method for starting a radio resource control suspended connection, so that the radio resource control suspended connection can be started quickly when the MME does not need to transmit data or after the data transmission is completed, thereby reducing the waste of resources (for example, reducing the terminal power consumption).

An NB-IoT core network system comprises a terminal, a base station, a mobility management entity, a service gateway and a packet data network gateway which are connected in sequence, wherein the mobility management entity can execute a starting method of wireless resource control suspension connection.

The computer device realizes that the radio resource control suspension connection is started quickly when the MME does not need to transmit data or after the data transmission is finished through the computer program running on the processor, thereby reducing the waste of resources (for example, reducing the energy consumption of the terminal and the like).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method for initiating a radio resource control suspended connection, comprising the steps of: receiving a non-access stratum message sent by a terminal, wherein the non-access stratum message is used for indicating whether data needs to be transmitted on a certain EPS bearer or not, and the data comprises uplink data and/or downlink data; when a certain EPS bearer needs to transmit downlink data, sending an indication message to a serving gateway, wherein the indication message carries part of information in the non-access stratum message, and the indication message is used for indicating the serving gateway to compare a timestamp corresponding to release auxiliary indication information in the non-access stratum message with the time of receiving the downlink data at last, and judging whether to start radio resource control to suspend connection according to a comparison result; when the time stamp is earlier than the time of the downlink data, receiving feedback information sent by the service gateway, and starting wireless resource control suspension connection according to the feedback information; and if the time stamp is later than the time of the downlink data, waiting for the next downlink data.

2. The method according to claim 1, wherein the indication message is a request for releasing an access bearer, the request for releasing the access bearer carries part of information in the non-access stratum message, and the request for releasing the access bearer is used to instruct the serving gateway to compare a timestamp corresponding to release auxiliary indication information in the non-access stratum message with a time when downlink data is received last, and when the timestamp is earlier than the time when the downlink data is received, the serving gateway releases base station information related to the terminal; the step of receiving the feedback information sent by the service gateway and starting the radio resource control suspension connection according to the feedback information comprises the following steps: receiving a release access bearer response fed back by the service gateway after the base station information related to the terminal is released according to the release access bearer request; sending a terminal content suspension request to the base station according to the access bearer release response, wherein the terminal content suspension request is used for indicating the base station to suspend terminal content, logic S1 connection and related bearer content; receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection, and the related bearer content; feeding back suspension completion information to the base station, wherein the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal, so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

3. The rrc connection activation method according to claim 1, wherein the indication message is a certain S11-C control message; the step of receiving the feedback information sent by the service gateway and starting the radio resource control suspension connection according to the feedback information comprises the following steps: receiving an access bearer releasing request sent by the serving gateway, and feeding back an access bearer releasing response to the serving gateway according to the access bearer releasing request, wherein the access bearer releasing response is used for indicating the serving gateway to release the base station information related to the terminal; sending a terminal content suspension request to the base station, wherein the terminal content suspension request is used for indicating the base station to suspend terminal content, logic S1 connection and related bearing content according to the terminal content; receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection, and the related bearer content; feeding back suspension completion information to the base station, wherein the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal, so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

4. The rrc connection activation method according to claim 1, wherein the indication message is an S11-C control message; the step of receiving the feedback information sent by the service gateway and starting the radio resource control suspension connection according to the feedback information comprises the following steps: receiving an S11-C control message response fed back by the service gateway; sending an access bearer releasing request to the serving gateway, wherein the access bearer releasing request is used for indicating the serving gateway to release the base station information related to the terminal; receiving a release access bearer response sent by the serving gateway, and sending a terminal content suspension request to the base station according to the release access bearer response, where the terminal content suspension request is used to instruct the base station to suspend terminal content, logic S1 connection, and related bearer content; receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection, and the related bearer content; feeding back suspension completion information to the base station, wherein the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal, so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

5. The method for initiating a radio resource control suspended connection according to any of claims 1-4, further comprising: if uplink data and downlink data are not needed on the certain EPS bearer, sending an access bearer releasing request to the serving gateway, wherein the access bearer releasing request is used for indicating the serving gateway to release base station information related to the terminal; receiving a release access bearer response sent by the serving gateway, and sending a terminal content suspension request to the base station according to the release access bearer response, where the terminal content suspension request is used to instruct the base station to suspend terminal content, logic S1 connection, and related bearer content; receiving a terminal content suspension response sent by the base station, and suspending the terminal content, the logic S1 connection, and the related bearer content; feeding back suspension completion information to the base station, wherein the suspension completion information is used for indicating the base station to send a radio resource control suspension connection request to the terminal, so that the terminal starts the radio resource control suspension connection according to the radio resource control suspension connection request.

6. An apparatus for initiating a radio resource control suspended connection, comprising: a message receiving module, configured to receive a non-access stratum message sent by a terminal, where the non-access stratum message is used to indicate whether data needs to be transmitted on a certain EPS bearer, and the data includes uplink data and/or downlink data; an indication message sending module, configured to send an indication message to a serving gateway when a downlink data needs to be transmitted on the certain EPS bearer, where the indication message carries part of information in the non-access stratum message, and the indication message is used to indicate the serving gateway to compare a timestamp corresponding to release auxiliary indication information in the non-access stratum message with a time when the downlink data is received last, and determine whether to start radio resource control suspend connection according to a comparison result; a feedback information receiving module, configured to receive feedback information sent by the serving gateway when the timestamp is earlier than the time of the downlink data; and the radio resource control suspension connection starting module is used for starting the radio resource control suspension connection according to the feedback information.

7. An NB-IoT core network system comprising a terminal, a base station, a mobility management entity, a serving gateway and a packet data network gateway connected in sequence, wherein the mobility management entity can perform the method of initiating a radio resource control suspended connection as claimed in any of claims 1-5.

8. A computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of initiating a radio resource control suspended connection according to any of claims 1-5 when executing the computer program.

9. A computer storage medium having a computer program stored thereon, the program, when executed by a processor, implementing a method of initiating a radio resource control suspended connection according to any of claims 1-5.