CN110891326B - Control plane connection reestablishing method, communication equipment, target base station and source base station - Google Patents
Control plane connection reestablishing method, communication equipment, target base station and source base station Download PDFInfo
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- CN110891326B CN110891326B CN201811045277.0A CN201811045277A CN110891326B CN 110891326 B CN110891326 B CN 110891326B CN 201811045277 A CN201811045277 A CN 201811045277A CN 110891326 B CN110891326 B CN 110891326B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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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
Abstract
The invention provides a control plane connection reestablishment method, communication equipment, a target base station and a source base station, wherein the CP connection reestablishment method comprises the following steps: receiving first indication information; the first indication information indicates a first non-access stratum (NAS) data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device sender has sent but has not received the NAS packet of the reception confirmation information. The scheme of the invention can prevent the communication equipment sender from retransmitting the received NAS data packet without receiving confirmation after the CP reestablishes the connection, thereby reducing the repeated sending of the network data packet and lightening the network burden.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a CP connection reestablishment method, a communication device, a target base station, and a source base station.
Background
At present, when a communication network such as a narrowband Band Internet of Things (NB-IoT) transmits Data in a Control Plane (CP) mode in a CP manner, because the Data is generally transmitted in a signaling manner through a Non-Access Stratum (NAS) layer and does not pass through a Packet Data Convergence Protocol (PDCP) layer unlike a conventional manner. The NAS layer itself does not have data transmission functions such as disorder and error adjustment, so when Radio Link Failure (RLF) occurs, since the NAS layer does not have a fault-tolerant mechanism of the PDCP, packet retransmission or packet loss easily occurs in the CP connection re-establishment process. Wherein, when the current NB-IoT is in a connected state in CP mode to transmit data and RLF occurs in one cell, a CP connection re-establishment procedure occurs.
However, when RLF occurs, no matter a mobile communication terminal, such as User Equipment (UE), or a network side device, such as a base station eNB, will clear all data packets buffered by a Radio Link Control (RLC) layer, and a status report of the RLC layer is slow, and there is a case that data of a part of the RLC layer is not acknowledged.
Disclosure of Invention
Embodiments of the present invention provide a control plane connection reestablishment method, a communication device, a target base station, and a source base station, so as to solve a problem that network load is increased due to retransmission of an NAS data packet that has been received but has not been received and confirmed after an existing CP connection reestablishment procedure.
In a first aspect, an embodiment of the present invention provides a CP connection reestablishment method, used in a communication device sender, where the communication device sender is one of a mobile communication terminal and a network side device, and the method includes:
receiving first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information;
after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device sender has sent the NAS data packet but has not received the receiving confirmation information.
In a second aspect, an embodiment of the present invention provides a CP connection reestablishment method, used in a communication device receiver, where the communication device receiver is one of a mobile communication terminal and a network side device, and the method includes:
sending first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication device receiver has received but has not sent the NAS packet of the reception confirmation information.
In a third aspect, an embodiment of the present invention provides a CP connection reestablishment method, where the method is used for a target base station, and the method includes:
receiving first indication information sent by a communication equipment receiving party; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; the communication equipment receiver is one of a mobile communication terminal and network side equipment;
forwarding the first indication information to a communication equipment sender;
after the connection is reestablished through the CP connection reestablishment process, receiving a second NAS data packet retransmitted by the communication equipment sender; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication equipment sender sends the NAS data packet but does not receive the receiving confirmation information;
and forwarding the second NAS data packet to the communication equipment receiver.
In a fourth aspect, an embodiment of the present invention provides a CP connection reestablishing method, where the method is used in a source base station, and the method includes:
sending the third NAS data packet to the MME; wherein the third NAS data packet is: the MME has sent but has not received the NAS data packet of the receiving confirmation information;
or
Receiving first indication information sent by an MME, and sending a second NAS data packet to the MME; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the mobile communication terminal has received but has not sent the NAS data packet of the receipt confirmation information; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the MME has sent but has not received a NAS packet for receiving confirmation information.
In a fifth aspect, an embodiment of the present invention provides a communication device, where the communication device is a sender, and the communication device is one of a mobile communication terminal and a network side device, and the communication device includes: a transmitter and a receiver;
the receiver is configured to: receiving first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information;
the transmitter is configured to: after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device has transmitted but has not received a NAS packet that received the acknowledgement.
In a sixth aspect, an embodiment of the present invention provides a communication device, where the communication device is a receiving party, and the communication device is one of a mobile communication terminal and a network side device, and the communication device includes: a transmitter and a receiver;
the transmitter is configured to: sending first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication device has received, but has not yet transmitted, a NAS packet that receives acknowledgement information.
In a seventh aspect, an embodiment of the present invention provides a target base station, where the target base station includes: a transmitter and a receiver;
the receiver is configured to: receiving first indication information sent by a communication equipment receiving party; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; the communication equipment receiver is one of a mobile communication terminal and network side equipment;
the transmitter is configured to: forwarding the first indication information to a communication equipment sender;
the receiver is further configured to: after the connection is reestablished through the CP connection reestablishment process, receiving a second NAS data packet retransmitted by the communication equipment sender; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication equipment sender sends the NAS data packet but does not receive the receiving confirmation information;
the transmitter is further configured to: and forwarding the second NAS data packet to the communication equipment receiver.
In an eighth aspect, an embodiment of the present invention provides a source base station, where the source base station includes: a transmitter and a receiver;
the transmitter is configured to: sending the third NAS data packet to the MME; wherein the third NAS data packet is: the MME has sent but has not received the NAS data packet of the receiving confirmation information;
or
The receiver is configured to: receiving first indication information sent by an MME, and sending a second NAS data packet to the MME; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the mobile communication terminal has received but has not sent the NAS data packet of the receipt confirmation information; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the MME has sent but has not received a NAS packet for receiving confirmation information.
In a ninth aspect, an embodiment of the present invention further provides a communication device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the CP connection reestablishment method described above. Optionally, the communication device may be a sender or a receiver, and may also be a target base station or a source base station.
In a tenth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the above CP connection reestablishment method.
In the embodiment of the invention, the communication equipment sender can avoid retransmitting the received NAS data packet without receiving confirmation after the connection is reestablished through the CP connection reestablishment process by receiving the first indication information and retransmitting the second NAS data packet, thereby reducing the repeated sending of the network data packet and lightening the network burden.
Drawings
Fig. 1 is a flowchart of a CP connection reestablishment method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of NAS data transmission according to an embodiment of the invention;
fig. 3 is a flowchart of a CP connection reestablishment process according to an embodiment of the present invention;
fig. 4 is a second flowchart of a CP connection reestablishment method according to an embodiment of the present invention;
fig. 5 is a third flowchart of a CP connection reestablishment method according to an embodiment of the present invention;
fig. 6 is a fourth flowchart of a CP connection reestablishment method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
fig. 8 is a second schematic structural diagram of a communication device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a CP connection reestablishment method, used for a communication device sender, where the communication device sender may be any one of a mobile communication terminal and a network side device, and the method includes the following steps:
step 101: first indication information is received.
The first indication information indicates a first NAS data packet, and the first NAS data packet may be: the communication device receiver has received but has not yet transmitted the NAS packet of the reception confirmation information.
It can be understood that, in the specific implementation, corresponding to the uplink data transmission process, the sender of the communication device is a mobile communication terminal, and the receiver of the communication device is a network side device; and corresponding to the downlink data transmission process, the sender of the communication equipment is network side equipment, and the receiver of the communication equipment is a mobile communication terminal.
Step 102: and after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet.
The second NAS data packet may be: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet may be: the communication device sender has sent but has not received the NAS packet of the reception confirmation information.
According to the CP connection reestablishment method provided by the embodiment of the invention, the communication equipment sending party can avoid retransmitting the received NAS data packet without receiving confirmation after reestablishing the connection through the CP connection reestablishment process by receiving the first indication information and retransmitting the second NAS data packet, so that the repeated sending of the network data packet is reduced, and the network burden is reduced.
For example, the UE upper layer gives 10 NAS packets, 5 packets have been transmitted through the RLC layer, and the 5 packets have also been received normally by the network, but since the RLC layer acknowledgement is not sent immediately, the UE does not receive the successful reception acknowledgement of the 5 packets, and at this time, if the RLF occurs, the UE RLC layer is cleared. After the UE successfully performs the cell CP connection reestablishment procedure, according to the existing method, in order to ensure that the data packets are transmitted without loss, all the previous 10 data packets need to be retransmitted; according to the reconstruction method of the embodiment of the invention, the 5 data packets which do not receive the successful receiving confirmation are not retransmitted, and only the other 5 data packets except the 5 data packets which do not receive the successful receiving confirmation in the 10 data packets are retransmitted, so that compared with the existing mode, the repeated sending of the network data packets is reduced, and the network load is lightened.
For another example, the network sends 10 NAS packets to a Mobility Management Entity (MME), and the MME has transmitted 5 packets through an eNB RLC layer, and the 5 packets have also been normally received by the UE, but since the UE RLC layer response is not immediately sent, the eNB does not receive a successful reception confirmation of the 5 packets, and at this time, if RLF occurs, the eNB RLC layer is cleared. After the UE successfully performs the cell CP connection reestablishment procedure, according to the existing manner, the MME needs to retransmit all the previous 10 data packets in order to ensure that data is transmitted without loss; according to the reconstruction method according to the embodiment of the present invention, the MME may not retransmit the 5 data packets that have not received the successful reception acknowledgement, and may retransmit only the other 5 data packets, except the 5 data packets that have not received the successful reception acknowledgement, of the 10 data packets, thereby reducing the repeated transmission of network data packets and reducing the network load compared to the existing manner.
It can be understood that, in the CP mode, a DRB bearer does not need to be established between the UE and the eNB, and there is no user plane processing, and as shown in fig. 2, a security function does not need to be started between the UE and the eNB, and the security of air interface data transmission is handled by the NAS layer, so there is no PDCP layer in the air interface protocol stack, the RLC layer directly interacts with the RRC layer, uplink data is carried in the NAS message included in the uplink RRC message, downlink data is carried in the NAS message included in the downlink RRC message, and uplink and downlink data are transmitted between the UE and the MME.
Therefore, in the specific embodiment of the present invention, optionally, the network side device may be an MME.
Optionally, in a case that the sender of the communication device is a network side device, the receiving the first indication information in step 101 may specifically be:
and the MME receives a CP reloading indication message carrying the first indication information sent by the target base station after the first indication information carried in the RRC connection reestablishment request message is acquired by the target base station.
That is, before downlink data is transmitted, the MME may receive the first INDICATION information through a CP reload INDICATION (CP RELOCATION INDICATION) message transmitted by the target base station, and the target base station may receive the first INDICATION information through an RRC connection reestablishment request (rrcconnectionresestoblockrequest-NB) message transmitted by the mobile communication terminal.
In this way, for downlink data transmission, the MME may perform subsequent data transmission based on the indication information fed back by the terminal side, thereby implementing simple data acknowledgement in the NAS layer, ensuring that subsequent data transmission is performed based on respective currently received data, avoiding retransmission of received data, and having an effect of simplifying a message flow, and processing with existing messages in the existing flow.
In a specific implementation, the first indication information may be used to indicate a sequence number of the first NAS data packet (downlink). An rrcconnectionrequestrequestfornascount-NB-r 14-IEs field (i.e., a downlink acknowledgement field) may be introduced into the corresponding rrcconnectionrequestrequestrequest-NB message to carry the first indication information, which reflects that the current mobile communication terminal has received the NAS packet but has not yet sent the reception acknowledgement information. A UE NAS Count IE field may be introduced in the corresponding CP RELOCATION INDICATION message to carry the first INDICATION information.
For example, in the specific embodiment of the present invention, as shown in the following, the following fields may be introduced into the structure of an rrcconnectionrequestablistenerquest-NB message (corresponding to the request message of 3GPP 36.331) sent by the mobile communication terminal (but the embodiment of the present invention is not limited thereto):
RRCConnectionRerestablisterequestForNASCount-NB-r 14-IEs field.
For another example, in the specific embodiment of the present invention, as shown in table 1 below, the following fields may be introduced into the structure of the CP RELOCATION INDICATION message (corresponding to the request message of 3GPP 36.331) sent by the target base station (but the embodiment of the present invention is not limited thereto):
UE NAS Count IE field.
TABLE 1
And the UE NAS Count IE field may be as shown in table 2 below:
TABLE 2
Optionally, in the case that the sender of the communication device is a mobile communication terminal, the receiving the first indication information in step 101 may specifically be:
and the mobile communication terminal receives the RRC connection reestablishment message carrying the first indication information after the target base station acquires the first indication information carried in the connection reestablishment indication message.
That is, before the uplink data is transmitted, the mobile communication terminal may receive the first INDICATION information through an RRC CONNECTION reestablishment (RRCConnectionReestablishment-NB) message transmitted by the target base station, and the target base station may receive the first INDICATION information through a CONNECTION reestablishment INDICATION (CONNECTION ESTABLISHMENT INDICATION) message transmitted by the MME.
In this way, for uplink data transmission, the mobile communication terminal can perform subsequent data transmission based on the indication information fed back by the network side, thereby realizing simple data confirmation on the NAS layer, ensuring that the subsequent data transmission is performed based on respective currently received data, avoiding retransmission of the received data, and having the effect of simplifying message flow, and utilizing the existing messages in the existing flow to process.
In a specific implementation, the first indication information may be used to indicate a sequence number of the first NAS data packet (uplink). An rrcconnectionreservationcollision-NB-r 14-IEs field (i.e., an uplink acknowledgement field) may be introduced into the corresponding rrcconnectionreservationnb message to carry the first indication information, which reflects that the current MME has received the NAS packet but has not sent the reception acknowledgement information. An MME NAS Count IE field may be introduced in the corresponding CONNECTION ESTABLISHMENT INDICATION message to carry the first INDICATION information.
For example, in a specific embodiment of the present invention, as shown in the following table 3, the following fields may be introduced into the structure of a CONNECTION ESTABLISHMENT INDICATION message (corresponding to a request message of 3GPP 36.331) sent by an MME (but the embodiment of the present invention is not limited thereto):
MME NAS Count IE field.
TABLE 3
And the MME NAS Count IE field may be as shown in table 4 below:
TABLE 4
For another example, in the specific embodiment of the present invention, as shown in the following, the following fields may be introduced into the structure of an rrcconnectionrequest assignment-NB message (corresponding to the request message of 3GPP 36.331) sent by the target base station (but the embodiment of the present invention is not limited thereto):
RRCConnectionReestablistingForNASCount-NB-r 14-IEs field.
In the embodiment of the present invention, when the sender of the communication device is a network side device (MME), the second NAS data packet to be retransmitted may be selected by the source base station or may be selected by the target base station according to an actual situation. Specifically, after step 101 and before step 102, the method further includes:
the MME receives a third NAS data packet sent by the source base station and selects a second NAS data packet from the third NAS data packet according to the first indication information;
alternatively, the first and second electrodes may be,
and the MME transmits the first indication information to the source base station and receives a second NAS data packet which is selected and transmitted by the source base station from the third NAS data packets according to the first indication information.
The CP connection reestablishment procedure according to the embodiment of the present invention is described below with reference to fig. 3.
Referring to fig. 3, a CP connection reestablishment process according to an embodiment of the present invention may include the following steps:
step 301: when RLF occurs in a source base station (Old eNB), UE sends a random access request (random access preamble) message to a target base station (New eNB);
step 302: after receiving the message, the target base station sends a random access response (RandomAccess response) message to the UE;
step 303: the UE sends an RRC connection reestablishment request (RRCConnectionRequirementRequest-NB) message to a target base station, wherein the request message can carry a terminal identifier S-TMSI, a UL-NAS-MAC and indication information 1, and the indication information 1 is used for indicating the sequence number of an NAS data packet which is received by the UE but does not send reception confirmation information;
step 304: MME selected by the target base station;
step 305: the target base station sends a CP reload INDICATION (CP RELOCATION INDICATION) message to the selected MME, wherein the INDICATION message can carry target cell identification, S-TMSI, UL-NAS-MAC, INDICATION information 1 and the like;
step 306: the MME verifies the UL-NAS-MAC and calculates the DL-NAS-MAC.
Step 307: the MME interacts with the source base station, and the NAS data packet which is not sent successfully is obtained through the S1-AP context release process;
step 308: the MME sends a CONNECTION reestablishment INDICATION (CONNECTION ESTABLISHMENT INDICATION) message to the target base station, wherein the INDICATION message carries DL-NAS-MAC, INDICATION information 2 and the like, and the INDICATION information 2 is used for indicating that the MME has received the sequence number of the NAS data packet which has not sent the receiving confirmation information;
step 309: a target base station sends an RRC connection reestablishment (RRCConnectionReestaligment-NB) message to UE, wherein the reestablishment message carries C-RNTI, DL-NAS-MAC, indication information 2 and the like;
step 310: the UE sends an RRC connection reestablishment completion (RRCConnectionreconstruction complete) message to a target base station, wherein the message carries the C-RNTI;
step 311: when data transmission is performed after CP connection is reestablished, the MME may retransmit other NAS data packets except the data packet indicated by the indication information 1, among the NAS data packets that have been sent by the MME but have not received the reception acknowledgement information; however, the UE may retransmit NAS packets other than the NAS packet indicated by the indication information 2, among NAS packets that have been transmitted by the UE but have not received the reception confirmation information.
In this way, the MME and the UE can avoid retransmitting the NAS data packet which is received but not received and confirmed, thereby reducing the repeated transmission of the network data packet and lightening the network load.
Referring to fig. 4, an embodiment of the present invention further provides a CP connection reestablishment method, used in a communication device receiving party, where the communication device receiving party may be any one of a mobile communication terminal and a network side device, and the method includes the following steps:
step 401: and sending the first indication information.
Wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication device receiver has received but has not sent the NAS packet of the reception confirmation information.
It can be understood that, in a specific implementation, when the communication device receiver is a mobile communication terminal, the communication device sender is a network side device, and corresponds to a downlink data transmission process and a downlink data packet of a corresponding data packet; and when the communication equipment receiver is network side equipment, the communication equipment sender is a mobile communication terminal and corresponds to an uplink data transmission process and an uplink data packet of a corresponding data packet.
The CP connection reestablishment method of the embodiment of the invention can avoid retransmitting the received NAS data packet without receiving confirmation after the communication equipment sender reestablishes the connection through the CP connection reestablishment process by sending the first indication information, thereby reducing the repeated sending of the network data packet and lightening the network burden.
In the specific embodiment of the present invention, optionally, the network side device is an MME.
Optionally, when the communication device receiver is a mobile communication terminal, the sending the first indication information in step 401 specifically includes:
sending an RRC connection reestablishment request message carrying the first indication information to a target base station;
or, in the case that the communication device receiver is a network side device, the sending of the first indication information in step 401 specifically includes:
and sending a connection reestablishment indication message carrying the first indication information to the target base station.
Optionally, when the communication device receiver is a network side device, before step 401, the method may further include:
and receiving the first NAS data packet sent by a source base station.
Referring to fig. 5, an embodiment of the present invention further provides a CP connection reestablishment method, used in a target base station, where the method includes the following steps:
step 501: and receiving first indication information sent by a communication equipment receiving party.
Wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; the communication equipment receiving party is one of a mobile communication terminal and network side equipment.
Step 502: and forwarding the first indication information to a communication equipment sender.
Step 503: and after the connection is reestablished through the CP connection reestablishment process, receiving a second NAS data packet retransmitted by the communication equipment sender.
Wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device sender has sent the NAS data packet but has not received the receiving confirmation information.
Step 504: and forwarding the second NAS data packet to the communication equipment receiver.
Optionally, the network side device is an MME.
The CP connection reestablishment method of the embodiment of the invention can prevent the retransmission of the received NAS data packet without receiving confirmation after the communication equipment sender reestablishes the connection through the CP connection reestablishment process, thereby reducing the repeated sending of the network data packet and lightening the network burden.
Referring to fig. 6, an embodiment of the present invention further provides a CP connection reestablishment method, used in a source base station, where the method includes the following steps:
step 601: and sending the third NAS data packet to the MME, or receiving first indication information sent by the MME and sending the second NAS data packet to the MME.
Wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the mobile communication terminal has received but has not sent the NAS data packet of the receipt confirmation information; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the MME has sent but has not received a NAS packet for receiving confirmation information.
The CP connection reestablishment method of the embodiment of the invention can prevent the retransmission of the received NAS data packet without receiving confirmation after the communication equipment sender reestablishes the connection through the CP connection reestablishment process, thereby reducing the repeated sending of the network data packet and lightening the network burden.
The above embodiments describe the CP connection reestablishment method of the present invention, and the communication device of the present invention will be described below with reference to the embodiments and the accompanying drawings.
Referring to fig. 7, an embodiment of the present invention further provides a communication device, where the communication device may be one of a mobile communication terminal and a network side device, and the communication device may include: a first processor 71, a transmitter 72 and a receiver 73.
In an embodiment of the present invention, when the communication device is a sender, the receiver 73 is configured to: receiving first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information;
the transmitter 72 is configured to: after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device has transmitted but has not received a NAS packet that received the acknowledgement.
Optionally, the network side device is an MME.
Optionally, in a case that the communication device is a network-side device, the receiver 73 is specifically configured to: receiving a CP (content provider) overloading indication message carrying the first indication information sent by a target base station after the first indication information carried in an RRC (radio resource control) connection reestablishment request message is acquired;
and/or
In the case that the communication device is a mobile communication terminal, the receiver 73 is specifically configured to: and receiving an RRC connection reestablishment message carrying the first indication information sent by the target base station after the first indication information carried in the connection reestablishment indication message is obtained.
Optionally, in a case that the communication device is a network-side device, the receiver 73 is further configured to:
receiving the third NAS data packet sent by a source base station, and selecting the second NAS data packet from the third NAS data packet according to the first indication information;
or
The transmitter 72 is further configured to: transmitting the first indication information to a source base station;
the receiver 73 is also configured to: and receiving the second NAS data packet which is selected and sent by the source base station from the third NAS data packets according to the first indication information.
In an embodiment of the present invention, when the communication device is a receiving party, the transmitter 72 is configured to: sending first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication device has received, but has not yet transmitted, a NAS packet that receives acknowledgement information.
Optionally, the network side device is an MME.
Optionally, when the communication device is a mobile communication terminal, the transmitter 72 is specifically configured to: sending an RRC connection reestablishment request message carrying the first indication information to a target base station;
or
In the case that the communication device is a network-side device, the transmitter 72 is specifically configured to: and sending a connection reestablishment indication message carrying the first indication information to the target base station.
Optionally, in a case that the communication device is a network-side device, the receiver 72 is configured to:
and receiving the first NAS data packet sent by a source base station.
In an embodiment of the present invention, when the communication device is a target base station, the receiver 73 is configured to: receiving first indication information sent by a communication equipment receiving party; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; the communication equipment receiver is one of a mobile communication terminal and network side equipment;
the transmitter 72 is configured to: forwarding the first indication information to a communication equipment sender;
the receiver 73 is also configured to: after the connection is reestablished through the CP connection reestablishment process, receiving a second NAS data packet retransmitted by the communication equipment sender; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication equipment sender sends the NAS data packet but does not receive the receiving confirmation information;
the transmitter 72 is further configured to: and forwarding the second NAS data packet to the communication equipment receiver.
Optionally, the network side device is an MME.
In this embodiment of the present invention, when the communication device is a source base station, the transmitter 72 is configured to: sending the third NAS data packet to the MME; wherein the third NAS data packet is: the MME has sent but has not received the NAS data packet of the receiving confirmation information;
or
The receiver 73 is configured to: receiving first indication information sent by an MME, and sending a second NAS data packet to the MME; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the mobile communication terminal has received but has not sent the NAS data packet of the receipt confirmation information; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the MME has sent but has not received a NAS packet for receiving confirmation information.
In the embodiment of the invention, after the communication equipment sender rebuilds the connection through the CP connection rebuilding process, the retransmission of the received NAS data packet without receiving confirmation is avoided, thereby reducing the repeated sending of the network data packet and lightening the network burden.
In FIG. 7, a bus architecture (represented by bus 70), the bus 70 may include any number of interconnected buses and bridges, with the bus 70 connecting together various circuits including one or more processors, represented by a first processor 71, and a memory, represented by a first memory 74. The transmitter 72 and the receiver 73 may be a transceiver interface, and the transmitter 72 and the receiver 73 may be connected to the first processor 71 and the memory 77 via the bus 70.
The first processor 71 is responsible for managing the bus 70 and general processing, and the first memory 74 may be used to store data used by the first processor 71 in performing operations.
In addition, an embodiment of the present invention further provides a communication device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, can implement each process of the above CP connection reestablishment method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. Optionally, the communication device may be a sender or a receiver, and may also be a target base station or a source base station.
Specifically, referring to fig. 8, an embodiment of the present invention further provides a communication device, which includes a bus 81, a transceiver 82, an antenna 83, a bus interface 84, a second processor 85, and a second memory 86.
In an embodiment of the present invention, the communication device further includes: a computer program stored on the second memory 86 and executable on the second processor 85.
Optionally, when the communication device is a sender, the communication device is one of a mobile communication terminal and a network side device, and the computer program, when executed by the second processor 85, may implement the following steps:
receiving first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information;
after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device sender has sent the NAS data packet but has not received the receiving confirmation information.
Optionally, when the communication device is a receiving party, the communication device is one of a mobile communication terminal and a network side device, and when executed by the second processor 85, the computer program may implement the following steps:
sending first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication device receiver has received but has not sent the NAS packet of the reception confirmation information.
Optionally, when the communication device is a target base station, the computer program may implement the following steps when executed by the second processor 85:
receiving first indication information sent by a communication equipment receiving party; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; the communication equipment receiver is one of a mobile communication terminal and network side equipment;
forwarding the first indication information to a communication equipment sender;
after the connection is reestablished through the CP connection reestablishment process, receiving a second NAS data packet retransmitted by the communication equipment sender; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication equipment sender sends the NAS data packet but does not receive the receiving confirmation information;
and forwarding the second NAS data packet to the communication equipment receiver.
Optionally, when the communication device is a source base station, the computer program may implement the following steps when executed by the second processor 85:
sending the third NAS data packet to the MME; wherein the third NAS data packet is: the MME has sent but has not received the NAS data packet of the receiving confirmation information;
or
Receiving first indication information sent by an MME, and sending a second NAS data packet to the MME; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the mobile communication terminal has received but has not sent the NAS data packet of the receipt confirmation information; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the MME has sent but has not received a NAS packet for receiving confirmation information.
In FIG. 8, a bus architecture (represented by bus 81), bus 81 may include any number of interconnected buses and bridges, and bus 81 links together various circuits including one or more processors represented by second processor 85 and a memory represented by second memory 86. The bus 81 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 84 provides an interface between the bus 81 and the transceiver 82. The transceiver 82 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the second processor 85 is transmitted over a wireless medium via the antenna 83, and further, the antenna 83 receives the data and transmits the data to the second processor 85.
The second processor 85 is responsible for managing the bus 81 and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. While the second memory 86 may be used to store data used by the second processor 85 in performing operations.
Alternatively, the second processor 85 may be a CPU, ASIC, FPGA or CPLD.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process of the above CP connection reestablishment method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
Computer-readable media, which include both non-transitory and non-transitory, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (24)
1. A control plane CP connection reestablishment method, used for a communication device sender, where the communication device sender is one of a mobile communication terminal and a network side device, and the method includes:
receiving first indication information; wherein the first indication information indicates a first non-access stratum (NAS) data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information;
after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device sender has sent the NAS data packet but has not received the receiving confirmation information.
2. The method of claim 1, wherein the network side device is a Mobility Management Entity (MME).
3. The method of claim 2, wherein:
when the sender of the communication device is a network side device, the receiving the first indication information specifically includes: receiving a CP (content provider) overloading indication message carrying the first indication information sent by a target base station after the first indication information carried in a Radio Resource Control (RRC) connection reestablishment request message is acquired by the target base station;
and/or
When the sender of the communication device is a mobile communication terminal, the receiving the first indication information specifically includes: and receiving an RRC connection reestablishment message carrying the first indication information sent by the target base station after the first indication information carried in the connection reestablishment indication message is obtained.
4. The method according to claim 3, wherein when the communication device sender is a network side device, after receiving the first indication information and before retransmitting the second NAS data packet, the method further comprises:
receiving the third NAS data packet sent by a source base station, and selecting the second NAS data packet from the third NAS data packet according to the first indication information;
or
And sending the first indication information to a source base station, and receiving the second NAS data packet selected and sent by the source base station from the third NAS data packets according to the first indication information.
5. A CP connection reestablishment method, used in a communication device receiver, where the communication device receiver is one of a mobile communication terminal and a network side device, and the method includes:
sending first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information;
the first indication information is used for retransmitting a second NAS data packet after the communication equipment sender reestablishes the connection through the CP connection reestablishment process; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device sender has sent the NAS data packet but has not received the receiving confirmation information.
6. The method of claim 5, wherein the network side device is an MME.
7. The method of claim 6, wherein:
when the communication device receiver is a mobile communication terminal, the sending of the first indication information specifically includes: sending an RRC connection reestablishment request message carrying the first indication information to a target base station;
or
When the communication device receiver is a network side device, the sending of the first indication information specifically includes: and sending a connection reestablishment indication message carrying the first indication information to the target base station.
8. The method according to claim 7, wherein before the sending the first indication information, if the communication device receiver is a network side device, the method further comprises:
and receiving the first NAS data packet sent by a source base station.
9. A CP connection reestablishment method for a target base station, the method comprising:
receiving first indication information sent by a communication equipment receiving party; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; the communication equipment receiver is one of a mobile communication terminal and network side equipment;
forwarding the first indication information to a communication equipment sender;
after the connection is reestablished through the CP connection reestablishment process, receiving a second NAS data packet retransmitted by the communication equipment sender; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication equipment sender sends the NAS data packet but does not receive the receiving confirmation information;
and forwarding the second NAS data packet to the communication equipment receiver.
10. The method of claim 9, wherein the network side device is an MME.
11. A CP connection reestablishment method for a source base station, the method comprising:
receiving first indication information sent by an MME, and sending a second NAS data packet to the MME; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the mobile communication terminal has received but has not sent the NAS data packet of the receipt confirmation information; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the MME has sent but has not received a NAS packet for receiving confirmation information.
12. A communication device, the communication device being a sender, the communication device being one of a mobile communication terminal and a network side device, the communication device comprising: a transmitter and a receiver;
the receiver is configured to: receiving first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information;
the transmitter is configured to: after the connection is reestablished through the CP connection reestablishment process, retransmitting the second NAS data packet; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device has transmitted but has not received a NAS packet that received the acknowledgement.
13. The communications device according to claim 12, wherein the network side device is an MME.
14. The communication device of claim 13, wherein:
in the case that the communication device is a network-side device, the receiver is specifically configured to: receiving a CP (content provider) overloading indication message carrying the first indication information sent by a target base station after the first indication information carried in an RRC (radio resource control) connection reestablishment request message is acquired;
and/or
In the case that the communication device is a mobile communication terminal, the receiver is specifically configured to: and receiving an RRC connection reestablishment message carrying the first indication information sent by the target base station after the first indication information carried in the connection reestablishment indication message is obtained.
15. The communications device of claim 14, wherein if the communications device is a network side device, the receiver is further configured to:
receiving the third NAS data packet sent by a source base station, and selecting the second NAS data packet from the third NAS data packet according to the first indication information;
or
The transmitter is further configured to: transmitting the first indication information to a source base station;
the receiver is further configured to: and receiving the second NAS data packet which is selected and sent by the source base station from the third NAS data packets according to the first indication information.
16. A communication device, the communication device being a receiving party, the communication device being one of a mobile communication terminal and a network side device, the communication device comprising: a transmitter and a receiver;
the transmitter is configured to: sending first indication information; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication device has received but has not sent a NAS packet for receiving confirmation information;
the first indication information is used for retransmitting a second NAS data packet after the communication equipment sender reestablishes the connection through the CP connection reestablishment process; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication device sender has sent the NAS data packet but has not received the receiving confirmation information.
17. The communications device of claim 16, wherein the network side device is an MME.
18. The communication device of claim 17, wherein:
in the case that the communication device is a mobile communication terminal, the transmitter is specifically configured to: sending an RRC connection reestablishment request message carrying the first indication information to a target base station;
or
In a case that the communication device is a network-side device, the transmitter is specifically configured to: and sending a connection reestablishment indication message carrying the first indication information to the target base station.
19. The communications device of claim 18, wherein if the communications device is a network side device, the receiver is configured to:
and receiving the first NAS data packet sent by a source base station.
20. A target base station, the target base station comprising: a transmitter and a receiver;
the receiver is configured to: receiving first indication information sent by a communication equipment receiving party; wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the communication equipment receiver receives the NAS data packet but does not send the receiving confirmation information; the communication equipment receiver is one of a mobile communication terminal and network side equipment;
the transmitter is configured to: forwarding the first indication information to a communication equipment sender;
the receiver is further configured to: after the connection is reestablished through the CP connection reestablishment process, receiving a second NAS data packet retransmitted by the communication equipment sender; wherein the second NAS data packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the communication equipment sender sends the NAS data packet but does not receive the receiving confirmation information;
the transmitter is further configured to: and forwarding the second NAS data packet to the communication equipment receiver.
21. The target base station of claim 20, wherein the network side device is an MME.
22. A source base station, the source base station comprising: a transmitter and a receiver;
the receiver is configured to: receiving first indication information sent by an MME;
the transmitter is configured to: sending a second NAS packet to the MME;
wherein the first indication information indicates a first NAS data packet, and the first NAS data packet is: the mobile communication terminal has received but has not sent the NAS data packet of the receipt confirmation information; the second NAS packet is: in the third NAS data packet, other NAS data packets except the first NAS data packet; the third NAS packet is: the MME has sent but has not received a NAS packet for receiving confirmation information.
23. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the CP connection re-establishment method according to any of claims 1 to 11.
24. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the CP connection reestablishment method according to any one of claims 1 to 11.
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