WO2017118012A1

WO2017118012A1 - Data transmission method, apparatus and system

Info

Publication number: WO2017118012A1
Application number: PCT/CN2016/094009
Authority: WO
Inventors: 余媛芳; 杜忠达; 沙秀斌; 戴谦; 陆婷
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-01-07
Filing date: 2016-08-08
Publication date: 2017-07-13
Also published as: CN106954280B; CN106954280A

Abstract

Disclosed are a data transmission method, apparatus and system. The method comprises: a terminal sending a wireless connection re-establishment request message to a network-side apparatus; and the terminal sending a wireless connection re-establishment completion message that carries uplink data to the network-side apparatus according to a wireless connection re-establishment message received from the network-side apparatus. The data transmission method, apparatus and system disclosed in the present invention can realize rapid recovery of data transmission by means of wireless connection re-establishment.

Description

Data transmission method, device and system

Technical field

The present invention relates to the field of communications, and in particular to a data transmission method, apparatus and system.

Background technique

M2M (Machine to Machine) communication is an important subject of the fifth generation of mobile communication technology (5G), and an important application field for wireless communication in the future. In the M2M communication project, a sub-topic of the Narrow Band-Internet of Things (NB-IoT) is proposed for the characteristics of low-cost low-throughput type terminals: that is, NB-IoT in the 200khz band. Low-cost terminals provide low-throughput wireless communication services.

The NB-IoT system mainly considers scenarios supporting ultra-low bandwidth, small data packets, deep coverage, delay tolerance, and long standby time; currently, based on Long Term Evolution (LTE) technology, the NB-IoT system is built and targeted. The NB-IoT scenario and service features optimize the existing LTE technology system. Although the NB-IoT system generally inherits the LTE architecture, both the air interface protocol stack and the core network will have different degrees of change: for example, because the supported service types are relatively simple, the air interface protocol stack is in media access control (MAC, Media). The Access Control layer will be greatly simplified; in order to meet the requirements of deep coverage, data transmission needs to consider more reliable mechanisms, such as more repeated transmissions to ensure reception, etc.; in order to meet the requirements of long standby time (10 years) Above), the processing of the wireless connection (connection establishment, connection reconfiguration, etc.) is simplified.

FIG. 1 is a schematic flowchart of a wireless connection re-establishment of an existing LTE. As shown in FIG. 1, step 101: The terminal sends a radio connection re-establishment request message to the base station; Step 102: The base station sends a radio connection re-establishment message to the terminal; Step 103: The terminal sends a radio connection re-establishment completion message to the base station; Step 104: The base station sends a radio connection reconfiguration message to the terminal; Step 105: The terminal sends a radio connection reconfiguration complete message to the base station. In LTE, the radio connection re-establishment operation is used to recover the radio signaling bearer 1 (SRB1, Signaling Radio Bearer 1), and the security is severe. Live and configuration of the primary cell; in the existing LTE wireless connection re-establishment operation, the signaling radio bearer can only be restored first. In order to recover the data radio bearer, it must be reconfigured through the wireless connection after the wireless connection re-establishment operation. The process is to restore the data radio bearer; the above specific content can refer to the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) TS36.331 protocol. The air interface signaling of the wireless link (for example, completion of wireless connection establishment, completion of wireless connection re-establishment, etc.) can be transmitted through SRB1.

Small data transmission wireless communication systems typified by NB-IoT systems (for example, the system bandwidth required by these systems may be different, some bandwidths are only 200k, some may reach 1.4M, etc., but have similar business requirements), although It is desirable to simplify the signaling process of the wireless connection, but the re-establishment process of the wireless connection is considered to be beneficial, and the scenario triggering the reconnection of the wireless connection is still present in the small data transmission wireless communication system represented by NB-IoT. .

FIG. 2a is a schematic flowchart of reusing the existing LTE wireless connection re-establishment operation to resume data transmission. As shown in FIG. 2a, steps 201 to 203 are the same as steps 101 to 103. Step 204: The terminal sends an uplink information transmission message carrying data to the base station to implement data transmission. However, considering the power saving requirements of the NB-IoT terminal (generally requiring the terminal to support the standby time of more than ten years), the power consumption of the terminal when transmitting the message is much greater than when receiving and standby, therefore, the transmission of the uplink information transmission message increases the terminal. Power consumption, to some extent reduce the standby time of the terminal. Moreover, while restoring data transmission through wireless connection re-establishment operations, it is also necessary to consider the fairness of resource usage to achieve optimal network performance.

FIG. 2b is a schematic diagram of a process for reusing the wireless connection re-establishment operation of the existing LTE to recover data transmission through the data radio bearer. As shown in FIG. 2b, the steps S201 to S203 are different from the steps S201 to S203 in FIG. 2a. After the wireless connection re-establishment operation, in steps S204b to S206b, the data radio bearer is recovered through the radio connection reconfiguration process, and the signaling interaction causes the terminal power consumption to increase and the delay of recovering the data transmission becomes longer, affecting Terminal standby time and business performance. Therefore, it is necessary to consider the recovery process of optimizing the radio bearer.

In the existing processing, the radio link re-establishment operation discards the data that the signaling radio bearer SRB has not transmitted, for example, the air interface packet data convergence layer PDCP module involved in data transmission will Discarding data that has not been transmitted on the SRB, this processing mode will cause the terminal to take longer to receive data even if the radio bearer is restored, resulting in increased terminal power consumption. Therefore, it is necessary to consider the recovery process of optimizing the radio bearer.

Summary of the invention

Embodiments of the present invention provide a data transmission method, apparatus, and system, which can re-establish fast recovery data transmission through a wireless connection.

According to an aspect of the embodiments of the present invention, a data transmission method is provided, including: a terminal transmitting a wireless connection re-establishment request message to a network side device; and the terminal re-establishing a message according to a wireless connection received from the network side device, Sending a wireless connection re-establishment completion message carrying the uplink data to the network side device.

Optionally, the wireless connection re-establishment request message carries small data transmission indication information and/or a reason for triggering the current wireless connection re-establishment request.

Optionally, the reason includes: the radio link fails, and the radio link control RLC maximum retransmission times is reached.

Optionally, the wireless connection re-establishment message carries a radio signaling bearer SRB1 configuration parameter.

According to another aspect of the present invention, a data transmission method is provided, including: a network side device receiving a wireless connection re-establishment request message sent by a terminal; and the network side device sending a wireless connection re-establishment message to the terminal; The network side device receives a wireless connection re-establishment complete message carrying the uplink data that is sent by the terminal according to the wireless connection re-establishment message.

Optionally, after the network side device receives the wireless connection re-establishment request message sent by the terminal, before the network side device sends the wireless connection re-establishment message to the terminal, the network side device further includes the following at least one step: when the wireless connection When the re-establishment request message carries the small data transmission indication information, the network side device configures a logical channel configuration parameter for the terminal according to the small data transmission indication information carried in the wireless connection re-establishment request message; when the wireless connection is re-established please When the message does not carry the small data transmission indication information, the network side device configures the logical channel configuration parameter for the terminal according to its own condition; when the wireless connection re-establishment request message carries the reason for triggering the current wireless connection re-establishment request The network side device configures a radio link control RLC configuration parameter according to the reason for triggering the current radio connection re-establishment request carried in the radio connection re-establishment request message; when the radio connection re-establishment request message is not When carrying the reason for triggering the current wireless connection re-establishment request, the network side device configures the RLC configuration parameter for the terminal according to its own condition or according to the small data transmission indication information carried in the wireless connection re-establishment request message.

Optionally, the method further includes: when the network side device receives the wireless connection establishment request message sent by the terminal, the network side device sends a wireless connection establishment message carrying the wireless signaling bearer SRB1 configuration parameter to the terminal.

Optionally, the SRB1 configuration parameter includes: an SRB1 configuration parameter of the first SRB1 and/or an SRB1 configuration parameter of the second SRB1, where the first SRB1 is used for transmitting signaling, and the second SRB1 is used for transmitting data.

Optionally, the SRB1 configuration parameter includes at least one of the following: an SRB1 identifier, a logical channel configuration parameter, and a radio link control RLC configuration parameter.

Optionally, the logical channel configuration parameter includes at least one of the following: a priority bit rate, a token bucket size time.

Optionally, the RLC configuration parameter includes an RLC maximum retransmission number that is greater than 32.

According to still another aspect of the embodiments of the present invention, a data transmission apparatus is provided, which is applied to a terminal, and includes: a first sending module configured to send a wireless connection re-establishment request message to a network side device; and a second sending module configured to And transmitting, according to the wireless connection re-establishment message received from the network side device, a wireless connection re-establishment completion message carrying the uplink data to the network side device.

According to still another aspect of the present invention, a data transmission apparatus is provided, which is applied to a network side device, and includes: a first receiving module configured to receive a wireless connection re-establishment request message sent by the terminal; and a third sending module, configured Re-establishing a message to the terminal for sending a wireless connection; the second receiving module is configured to receive a wireless connection re-establishment complete message carrying the uplink data sent by the terminal according to the wireless connection re-establishment message.

According to still another aspect of the embodiments of the present invention, a data transmission method is provided, including: a terminal sending a wireless connection re-establishment request message to a network side device; and the network side device transmitting a request message according to the wireless connection, sending a wireless The connection re-establishment message is sent to the terminal; the terminal re-establishes a message according to the wireless connection, and sends a wireless connection re-establishment completion message carrying the uplink data to the network side device.

According to still another aspect of the embodiments of the present invention, a data transmission system includes: a terminal and a network side device; the terminal configured to send a wireless connection re-establishment request message to a network side device; And configured to send a wireless connection re-establishment message to the terminal according to the wireless connection re-establishment request message, where the terminal is further configured to send a wireless connection re-establishment complete message carrying the uplink data according to the wireless connection re-establishment message To the network side device.

According to still another aspect of the embodiments of the present invention, a data transmission method is provided, including: a terminal sending a wireless connection re-establishment request message to a network side device; after receiving the wireless connection recovery message sent by the network side device, the terminal receives the wireless connection recovery message Perform an operation to restore the wireless connection.

Optionally, after the terminal resumes the operation of restoring the wireless connection according to the received wireless connection recovery message, the terminal sends a wireless connection recovery complete message to the network side device.

Optionally, the performing, by the terminal, the operation of restoring the wireless connection includes at least one of: resetting a timer T301; re-establishing a lower layer entity, where the lower layer entity includes an RLC and/or a PDCP entity; and recovering the radio bearer, where The radio bearer includes a signaling radio bearer and/or a data radio bearer; the reactivation access layer security, wherein the access layer security includes at least one of the following: integrity protection and encryption on the signaling radio bearer; Encryption on the radio bearer.

Optionally, the performing, by the terminal, the PDCP re-establishment operation includes: when the PDCP layer of the terminal receives the PDCP re-establishment indication, the terminal performs a PDCP re-establishment process of the signaling radio bearer.

Optionally, the re-establishment process performed by the terminal includes at least one of the following: for the data sent by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the PDCP re-establishment process of the terminal includes at least one of the following: Retransmitting a data packet that has not been successfully transmitted, and performing security protection operations on the data packet; wherein the security protection operation includes encryption and integrity protection; and when the PDCP layer receives the PDCP re-establishment indication for the data received by the terminal The PDCP re-establishment process of the terminal includes at least one of: processing a data packet received from a lower layer, and performing a security protection operation on the data packet; wherein the security protection operation includes decryption and integrity protection verification.

According to still another aspect of the embodiments of the present invention, a data transmission method is provided, including: a terminal sending a wireless connection re-establishment request message to a network side device; after receiving the wireless connection re-establishment message sent by the network side device, the terminal receives the wireless connection re-establishment message , perform the operation of reestablishing the wireless connection.

Optionally, the performing, by the terminal, the operation of reestablishing the wireless connection at least includes: performing, by the terminal, an operation of re-connecting the PDCP.

Optionally, the performing, by the terminal, the operation of performing PDCP reconnection includes: at least: PDCP of the terminal When the layer receives the PDCP re-establishment indication, the layer performs the PDCP re-establishment process of the signaling radio bearer.

Optionally, the re-establishment process includes at least one of the following: for the data sent by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the PDCP re-establishment process of the terminal includes at least one of the following: The data packet is retransmitted and the security protection operation is performed on the data packet; wherein the security protection operation includes encryption and integrity protection; and for the data received by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the terminal The PDCP re-establishment process includes at least one of: processing a data packet received from a lower layer, and performing a security protection operation on the data packet; wherein the security protection operation includes decryption and integrity protection verification.

According to still another embodiment of the present invention, there is further provided a computer readable storage medium storing computer executable instructions that, when executed, implement the above-described data transmission method on the terminal side.

According to still another embodiment of the present invention, there is provided a computer readable storage medium storing computer executable instructions that, when executed, implement the above-described data transmission method on the network side.

In the embodiment of the present invention, when the terminal performs the wireless connection re-establishment operation, if there is uplink data to be sent, the terminal transmits the uplink data to the network side device through the wireless connection re-establishment completion message. In this way, re-establishing fast recovery data transmission over a wireless connection is achieved.

Moreover, the network side device configures the logical channel configuration parameter and the RLC configuration parameter for the terminal according to the small data transmission indication information. In this way, while the data connection is restored through the wireless connection re-establishment operation, the fairness of the resource usage is ensured, thereby achieving the optimal performance of the entire network.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

FIG. 1 is a schematic flowchart of a wireless connection re-establishment of an existing LTE;

2a is a schematic flowchart of reusing the existing LTE wireless connection re-establishment operation to resume data transmission;

2b is a schematic diagram of a process of restoring data transmission by using a data radio bearer by reusing the existing LTE wireless connection re-establishment operation;

FIG. 3a is a flowchart 1 of a data transmission method according to an embodiment of the present invention;

FIG. 3b is a second flowchart of a data transmission method according to an embodiment of the present invention;

3c is a flowchart 3 of a data transmission method according to an embodiment of the present invention;

FIG. 4 is another flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 5a is a flowchart 1 of a data transmission method according to Embodiment 1 of the present invention;

FIG. 5b is a second flowchart of a data transmission method according to Embodiment 1 of the present invention; FIG.

6 is a flowchart of a data transmission method according to Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of a data transmission system according to an embodiment of the present invention. .

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

FIG. 3a is a flowchart 1 of a data transmission method according to an embodiment of the present invention. As shown in FIG. 3a, the data transmission method provided in this embodiment includes the following steps:

Step 301a: The terminal sends a wireless connection re-establishment request message to the network side device.

Step 302: The terminal re-establishes a message according to the wireless connection received from the network side device, and sends a wireless connection re-establishment completion message carrying the uplink data to the network side device.

Optionally, the wireless connection re-establishment request message carries the small data transmission indication information and/or the reason for triggering the current wireless connection re-establishment request.

Optionally, the reason includes: the radio link fails to reach a maximum number of retransmissions of the radio link control (RLC).

Optionally, the wireless connection re-establishment message carries a radio signaling bearer 1 (SRB1, Signaling Radio Bearer 1) Configuration parameters.

FIG. 3b is a second flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 3b, the steps of the method include:

Step S301b: The terminal sends a wireless connection re-establishment request message to the network side device;

Step S302b: After receiving the wireless connection recovery message sent by the network side device, the terminal performs an operation of restoring the wireless connection.

Optionally, the operation of the terminal to perform the restoration of the wireless connection includes at least one of the following: resetting the timer T301; re-establishing the lower layer entity, where the lower layer entity includes the RLC and/or the PDCP (Packet Data Convergence Protocol) entity Recovering the radio bearer, wherein the radio bearer comprises a signaling radio bearer and/or a data radio bearer; re-enabling the access layer security, wherein the access layer security comprises at least one of the following: integrity protection on the signalling radio bearer Encryption; encryption on the data radio bearer.

Optionally, the re-establishment process performed by the terminal includes: when the PDCP layer receives the PDCP re-establishment indication, the PDCP re-establishment process of the terminal includes at least one of the following: loading the data packet that is not successfully sent. The security protection operation is performed on the data packet. The security protection operation includes encryption and integrity protection. For the data received by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the terminal performs the PDCP re-establishment process to include at least one of the following: The data packets received from the lower layer are processed and the data packets are secured. The security protection operations include decryption and integrity protection verification.

FIG. 3c is a third flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 3c, the steps of the method include:

Step S301c: The terminal sends a wireless connection re-establishment request message to the network side device.

Step S302c: After receiving the wireless connection re-establishment message sent by the network side device, the terminal performs an operation of reestablishing the wireless connection.

Optionally, the performing, by the terminal, the operation of reestablishing the wireless connection includes at least the operation of the terminal performing the PDCP reconnection.

Optionally, the performing, by the terminal, the PDCP reconnection process includes: performing a PDCP re-establishment process of the signaling radio bearer when the PDCP layer of the terminal receives the PDCP re-establishment indication.

Optionally, the re-establishment process includes at least one of the following: for the data sent by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the terminal performs the PDCP re-establishment process to include at least one of the following: performing the data packet that is not successfully sent. Re-transmission, security protection operation on the data packet; wherein the security protection operation includes encryption and integrity protection; for the data received by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the terminal performs the PDCP re-establishment process including at least one of the following : Processing packets received from the lower layer and performing security protection operations on the data packets; wherein the security protection operations include decryption and integrity protection verification.

FIG. 4 is another flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 4, the data transmission method provided in this embodiment includes the following steps:

Step 401: The network side device receives a wireless connection re-establishment request message sent by the terminal.

Step 402: The network side device sends a wireless connection re-establishment message to the terminal.

Step 403: The network side device receives the wireless connection re-establishment completion message carrying the uplink data sent by the terminal according to the wireless connection re-establishment message.

Optionally, the wireless connection re-establishment message carries an SRB1 configuration parameter.

Optionally, the SRB1 configuration parameter includes: an SRB1 configuration parameter of the first SRB1 and/or an SRB1 configuration parameter of the second SRB1; the first SRB1 is used for transmitting signaling, and the signaling may include a non-access bearer. Signaling (eg, attach, re-attach, etc.), and/or signaling of the access bearer (eg, wireless connection setup completion, wireless connection release, capability query, etc.) The second SRB1 is used to transmit data.

Optionally, the SRB1 configuration parameter includes at least one of the following: an SRB1 identifier, a logical channel configuration parameter, and an RLC configuration parameter.

The SRB1 identifier may be used to identify the first SRB1 and the second SRB1.

Specifically, when the SRB1 configuration parameter includes the SRB1 configuration parameter of the first SRB1, the SRB1 configuration parameter of the first SRB1 includes at least one of the following: an SRB1 identifier of the first SRB1, a logical channel configuration parameter of the first SRB1, and a first SRB1. The RLB configuration parameter; when the SRB1 configuration parameter includes the SRB1 configuration parameter of the second SRB1, the SRB1 configuration parameter of the second SRB1 includes at least one of the following: an SRB1 identifier of the second SRB1, a logical channel configuration parameter of the second SRB1, and a second The SRB1 configuration parameter of the SRB1; when the SRB1 configuration parameter includes the SRB1 configuration parameter of the first SRB1 and the SRB1 configuration parameter of the second SRB1, there are two sets of SRB1 configuration parameters, where the SRB1 configuration parameter of the first SRB1 includes at least one of the following: The SRB1 identifier of the first SRB1, the logical channel configuration parameter of the first SRB1, and the RLC configuration parameter of the first SRB1, and the SRB1 configuration parameter of the second SRB1 includes at least one of the following: an SRB1 identifier of the second SRB1, and a logical channel of the second SRB1 Configuration parameters and RLC configuration parameters of the second SRB1.

The logical channel configuration parameter includes at least one of the following: a priority bit rate, and a token bucket size time.

Specifically, the priority bit rate is a minimum rate requirement guarantee for each logical channel, and is configured to be infinite, meaning that a logical channel lower than its priority is considered only when the resources of the logical channel are satisfied. In existing LTE, since SRB1 generally transmits control signaling, it has high requirements on delay and reliability. Therefore, SRB1 has the highest priority, and resource configuration will be preferentially guaranteed. However, if SRB1 is used, Data transmission, if the highest priority is still used for resource configuration, since the general data packet requires more resources than the control signaling, it may affect the reliability of true control signaling transmission and the fairness of resource usage. . Therefore, in this embodiment, the priority bit rate of the logical channel of the second SRB1 is configured to be infinite (ie, the logical channel configuration parameter of the second SRB1 includes the value not being infinite. Priority bit rate) to avoid the impact of general data packets on true control signaling.

Optionally, after step 401, before step 402, the method further includes at least one of the following steps:

When the wireless connection re-establishment request message carries the small data transmission indication information, the network side device configures the logical channel configuration parameter for the terminal according to the small data transmission indication information carried in the wireless connection re-establishment request message;

When the wireless connection re-establishment request message does not carry the small data transmission indication information, the network side device configures the logical channel configuration parameter for the terminal according to its own condition;

When the wireless connection re-establishment request message carries the reason for triggering the current wireless connection re-establishment request, the network-side device configures the RLC configuration parameter for the terminal according to the reason for triggering the current wireless connection re-establishment request carried in the wireless connection re-establishment request message;

When the wireless connection re-establishment request message does not carry the reason for triggering the current wireless connection re-establishment request, the network-side device configures the RLC configuration parameter for the terminal according to the self-condition or the small data transmission indication information carried in the wireless connection re-establishment request message.

Optionally, the method further includes: when the network side device receives the wireless connection establishment request message sent by the terminal, the network side device sends a wireless connection establishment message carrying the SRB1 configuration parameter to the terminal. The specific content of the SRB1 configuration parameter is the same as that described above, and thus is not described herein.

In addition, the embodiment of the present invention further provides a data transmission method, including the following steps: the terminal sends a wireless connection re-establishment request message to the network side device; the network side device sends a wireless connection re-establishment message to the terminal according to the wireless connection re-establishment request message. The terminal re-establishes a message according to the wireless connection, and sends a wireless connection re-establishment completion message carrying the uplink data to the network side device.

The present application will be described in detail below by way of specific embodiments.

FIG. 5a is a flowchart of a data transmission method according to Embodiment 1 of the present invention. As shown in FIG. 5a, in this embodiment, the network side device is a base station. The data transmission method provided in this embodiment includes the following steps:

Step 501a: The terminal sends a radio connection re-establishment request message to the base station.

Optionally, the terminal re-establishes the request message through the wireless connection to indicate that there is a small data transmission. Specifically, the wireless connection re-establishment request message carries small data transmission indication information to indicate that there is a small data transmission; or the small data transmission indication information carried by the wireless connection re-establishment message indicates that there is a small data transmission.

Optionally, the terminal carries the reason for triggering the re-establishment operation of the wireless connection in the wireless connection re-establishment request message, where the reason may be: the radio link fails, and the maximum number of retransmissions of the RLC is reached.

Step 502a: The base station receives the radio connection re-establishment request message, and sends a radio connection re-establishment message carrying the SRB1 configuration parameter to the terminal.

The SRB1 configuration parameter is encapsulated in a dedicated radio resource configuration parameter, and the dedicated radio resource configuration parameter further includes other parameters related to radio transmission.

Optionally, the SRB1 configuration parameter includes a logical channel configuration parameter, where the logical channel configuration parameter includes one or a combination of the following: a priority bit rate, a token bucket size time.

Optionally, the SRB1 configuration parameter includes an RLC configuration parameter, where the RLC configuration parameter includes an RLC maximum retransmission number that is greater than 32.

Optionally, the base station configures a logical channel configuration parameter for the terminal according to the small data transmission indication information.

Optionally, the base station configures the RLC configuration parameter for the terminal according to the wireless connection re-establishment failure reason.

Step 503a: The terminal carries the uplink data to the base station by using a radio connection re-establishment completion message.

Based on the above embodiment, in a small data wireless communication system typified by an NB-IoT system, For example, when the physical layer is out of synchronization or reaches the maximum number of retransmissions of the upper layer (RLC layer) (this parameter is configured by wireless connection signaling, the existing maximum number of retransmissions is 32), the wireless connection re-establishment can be triggered. The SRB1 is quickly restored by the RRC (Radio Resource Control) re-establishment process, that is, the connection layer (AS, Access Stratum) triggers the recovery of the connection. When the data of these systems is transmitted on SRB1, fast recovery of SRB1 can allow fast recovery of data transmission, which is beneficial for the abnormal report type of data transmission (such data has higher latency requirements, usually requiring completion of transmission within 10 seconds, for example , fire alarms, flood warnings, earthquake warnings, etc.). Otherwise, the terminal will be released to the idle state, and then the application layer will re-trigger the connection establishment, and the delay will increase significantly. If the alarm is not reported in time, the optimal rescue opportunity may be missed, resulting in greater loss. .

Moreover, when the power consumption of the terminal is much larger than that of the receiving and the standby, the embodiment of the present invention can reduce the uplink message transmission, thereby reducing the power consumption of the terminal, increasing the standby time of the terminal to a certain extent, thereby achieving better terminal battery life. .

In another alternative embodiment of the present embodiment, FIG. 5b is a flowchart of a data transmission method according to Embodiment 1 of the present invention. As shown in FIG. 5b, in this embodiment, the network side device is a base station. The data transmission method provided in this embodiment includes the following steps:

Step S501b: a wireless connection re-establishment request;

Step S502b: the wireless connection is restored;

Step S503b: the wireless connection recovery is completed;

Step S504b: Data transmission.

FIG. 6 is a flowchart of a data transmission method according to Embodiment 2 of the present invention. The difference between this embodiment and the first embodiment is that, in this embodiment, the wireless connection setup message may carry the SRB1 configuration parameter, and the SRB1 configuration parameter includes: the first SRB1, in addition to the wireless connection re-establishment message carrying the SRB1 configuration parameter. SRB1 configuration parameter and/or SRB1 configuration parameter of the second SRB1.

Specifically, in step 601, the terminal sends a wireless connection establishment request message to the base station, and optionally, the wireless connection establishment request message carries small data transmission indication information; Step 602: The station sends a radio connection setup message carrying the SRB1 configuration parameter to the terminal. Step 603: The terminal sends a radio connection setup complete message carrying the uplink data to the base station. The specific content of the SRB1 configuration parameter is the same as that in the foregoing embodiment, and therefore will not be further described herein.

In addition, the embodiment of the present invention further provides a data transmission apparatus, which is applied to a terminal, and includes: a first sending module configured to send a wireless connection re-establishment request message to the network side device; and a second sending module configured to be based on the slave network side The wireless connection re-establishment message received by the device sends a wireless connection re-establishment completion message carrying the uplink data to the network side device.

In addition, the embodiment of the present invention further provides a data transmission apparatus, which is applied to a network side device, and includes: a first receiving module configured to receive a wireless connection re-establishment request message sent by the terminal; and a third sending module configured to send a wireless connection And re-establishing the message to the terminal; the second receiving module is configured to receive, by the receiving terminal, the wireless connection re-establishment completion message that carries the uplink data according to the wireless connection re-establishment message.

The specific processing procedure for the above device is the same as that described above, and thus will not be described again.

In addition, the embodiment of the present invention further provides a data transmission system, including: a terminal and a network side device; the terminal is configured to send a wireless connection re-establishment request message to the network side device; and the network side device is configured to be heavy according to the wireless connection The request message is sent, and the wireless connection re-establishment message is sent to the terminal. The terminal is further configured to re-establish the message according to the wireless connection, and send a wireless connection re-establishment completion message carrying the uplink data to the network side device.

FIG. 7 is a schematic diagram of a data transmission system according to an embodiment of the present invention. As shown in FIG. 7, the data transmission system provided in this embodiment includes a terminal and a network side device. The terminal includes a first sending module and a second sending module, and the network side device includes a first receiving module, a second receiving module, and a third sending module.

Specifically, the first sending module sends a wireless connection re-establishment request message to the network side device, the first receiving module receives the wireless connection re-establishment request message, and the third sending module sends a wireless connection according to the wireless connection re-establishment request message. And establishing, by the second sending module, the wireless connection re-establishment completion message carrying the uplink data, and the second receiving module receiving the wireless connection re-establishment completion message carrying the uplink data.

In addition, the specific processing procedure of the above system is the same as that described above, and thus will not be described herein.

In a practical application, the first sending module, the second sending module, and the third sending module are, for example, wireless communication components having a transmitting function, and the first receiving module and the second receiving module are, for example, wireless communication components having a receiving function.

In summary, in the embodiment of the present invention, when the terminal performs the wireless connection re-establishment operation, the terminal re-establishes the completion message through the wireless connection to carry the uplink data to the network side device. In this way, re-establishing fast recovery data transmission over a wireless connection is achieved.

The embodiment of the present invention further provides a terminal, including: a first wireless communication unit and a second wireless communication unit, where the first wireless communication unit is connected to the second wireless communication unit, and the first wireless communication unit is configured to send a wireless connection re-establishment request message. To the network side device, the second wireless communication unit is configured to receive a wireless connection re-establishment message from the network side device, and the first wireless communication unit is further configured to send a wireless connection re-establishment completion message carrying the uplink data to the network side device.

The first wireless communication unit is, for example, a wireless communication component having a transmitting function, and the second wireless communication unit is, for example, a wireless communication component having a receiving function.

In addition, an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, where the computer-executable instructions are executed to implement the foregoing data transmission on the terminal side. method.

In addition, an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, where the computer executable instructions are implemented to implement the data transmission method on the network side.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. The invention is not limited to any specific form of combination of hardware and software.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. The present invention is not limited by the above-described embodiments, and the above-described embodiments and the description are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention. And modifications are intended to fall within the scope of the invention as claimed.

Industrial applicability

Claims

A data transmission method includes:

The terminal sends a wireless connection re-establishment request message to the network side device;

And the terminal sends a wireless connection re-establishment completion message carrying the uplink data to the network side device according to the wireless connection re-establishment message received from the network side device.
The method of claim 1, wherein the wireless connection re-establishment request message carries small data transmission indication information and/or a reason for triggering the current wireless connection re-establishment request.
The method of claim 2, wherein the cause comprises: the radio link fails to reach a maximum number of retransmissions of the radio link control RLC.
The method according to any one of claims 1 to 3, wherein the wireless connection re-establishment message carries a radio signaling bearer SRB1 configuration parameter.
A data transmission method includes:

The network side device receives a wireless connection re-establishment request message sent by the terminal;

The network side device sends a wireless connection re-establishment message to the terminal;

The network side device receives a wireless connection re-establishment complete message carrying the uplink data that is sent by the terminal according to the wireless connection re-establishment message.
The method of claim 5, wherein the wireless connection re-establishment request message carries small data transmission indication information and/or a reason for triggering the current wireless connection re-establishment request.
The method according to claim 6, wherein after the network side device receives the wireless connection re-establishment request message sent by the terminal, the network side device further includes at least one of the following before sending the wireless connection re-establishment message to the terminal Steps:

When the wireless connection re-establishment request message carries the small data transmission indication information, the network side device configures a logical channel configuration parameter for the terminal according to the small data transmission indication information carried in the wireless connection re-establishment request message;

When the wireless connection re-establishment request message does not carry the small data transmission indication information, the network side device configures a logical channel configuration parameter for the terminal according to its own condition;

When the wireless connection re-establishment request message carries the reason for triggering the current wireless connection re-establishment request, the network side device is configured to trigger the current wireless connection re-establishment request according to the wireless connection re-establishment request message. The terminal configures the radio link control RLC configuration parameter;

When the wireless connection re-establishment request message does not carry the reason for triggering the current wireless connection re-establishment request, the network-side device configures the RLC for the terminal according to the self-condition or according to the small data transmission indication information carried in the wireless connection re-establishment request message. Configuration parameters.
The method of claim 5 wherein said wireless connection re-establishment message carries a radio signaling bearer SRB1 configuration parameter.
The method according to claim 5, further comprising: when the network side device receives the wireless connection establishment request message sent by the terminal, the network side device sends the wireless connection establishment that carries the wireless signaling bearer SRB1 configuration parameter. A message is sent to the terminal.
The method according to claim 8 or 9, wherein the SRB1 configuration parameter comprises: an SRB1 configuration parameter of the first SRB1 and/or an SRB1 configuration parameter of the second SRB1, where the first SRB1 is used for transmitting signaling, The second SRB1 is used to transmit data.
The method of claim 10, wherein the SRB1 configuration parameter comprises at least one of: SRB1 identification, logical channel configuration parameters, radio link control RLC configuration parameters.
The method of claim 11, wherein the logical channel configuration parameters comprise at least one of: a priority bit rate, a token bucket size time.
The method of claim 11, wherein the RLC configuration parameter comprises an RLC maximum number of retransmissions having a value greater than 32.
A data transmission device is applied to a terminal, including:

a first sending module, configured to send a wireless connection re-establishment request message to the network side device;

The second sending module is configured to send a wireless connection re-establishment completion message carrying the uplink data to the network side device according to the wireless connection re-establishment message received from the network side device.
The apparatus of claim 14, wherein the wireless connection re-establishment request message carries small data transmission indication information and/or a reason for triggering the current wireless connection re-establishment request.
The apparatus of claim 14 or 15, wherein the wireless connection re-establishment message carries a radio signaling bearer SRB1 configuration parameter.
A data transmission device is applied to a network side device, including:

The first receiving module is configured to receive a wireless connection re-establishment request message sent by the terminal;

a third sending module, configured to send a wireless connection re-establishment message to the terminal;

The second receiving module is configured to receive a wireless connection re-establishment completion message that carries the uplink data that is sent by the terminal according to the wireless connection re-establishment message.
The apparatus of claim 17, wherein the wireless connection re-establishment request message carries small data transmission indication information and/or a reason for triggering the current wireless connection re-establishment request.
The apparatus of claim 17 or 18, wherein the wireless connection re-establishment message carries a radio signaling bearer SRB1 configuration parameter.
A data transmission method includes:

The terminal sends a wireless connection re-establishment request message to the network side device;

The network side device sends a wireless connection re-establishment message to the terminal according to the wireless connection re-establishment request message;

The terminal re-establishes a message according to the wireless connection, and sends a wireless connection re-establishment completion message carrying the uplink data to the network side device.
The method of claim 20, wherein the wireless connection re-establishment request message carries small data transmission indication information and/or a reason for triggering the current wireless connection re-establishment request.
The method of claim 20 or 21, wherein the wireless connection re-establishment message carries a radio signaling bearer SRB1 configuration parameter.
A data transmission system includes: a terminal and a network side device,

The terminal is configured to send a wireless connection re-establishment request message to the network side device;

The network side device is configured to send a wireless connection re-establishment message to the terminal according to the wireless connection re-establishment request message;

The terminal is further configured to send a wireless connection re-establishment completion message carrying the uplink data to the network side device according to the wireless connection re-establishment message.
The system of claim 23, wherein the wireless connection re-establishment request message carries small data transmission indication information and/or a reason for triggering the current wireless connection re-establishment request.
The system of claim 23 or 24, wherein the wireless connection re-establishment message carries a radio signaling bearer SRB1 configuration parameter.
A data transmission method includes:

The terminal sends a wireless connection re-establishment request message to the network side device;

After receiving the wireless connection recovery message sent by the network side device, the terminal performs an operation of restoring the wireless connection.
The method according to claim 26, wherein the terminal transmits a wireless connection recovery completion message to the network side device after the operation of restoring the wireless connection is resumed according to the received wireless connection recovery message.
The method of claim 26, wherein the operation of the terminal to perform a resume wireless connection comprises at least one of the following:

Reset timer T301;

Reestablishing a lower layer entity, wherein the lower layer entity comprises an RLC and/or a PDCP entity;

Recovering the radio bearer, wherein the radio bearer comprises a signaling radio bearer and/or a data radio bearer;

Re-enabling access layer security, wherein the access layer security includes at least one of the following:

Integrity protection and encryption on the signaling radio bearer;

Encryption on the data radio bearer.
The method according to claim 28, wherein the operation of the terminal to perform PDCP re-establishment comprises at least: when the PDCP layer of the terminal receives the PDCP re-establishment indication, the terminal performs a PDCP re-establishment process of the signaling radio bearer.
The method of claim 29, wherein the re-establishment process performed by the terminal comprises at least one of the following:

For the data sent by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the PDCP re-establishment process of the terminal includes at least one of the following: retransmitting the data packet that has not been successfully transmitted, and protecting the data packet. Operation; wherein the security protection operation includes encryption and integrity protection;

For the data received by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the terminal performs the PDCP re-establishment process to include at least one of the following: processing the data packet received from the lower layer, and protecting the data packet. Operation; wherein the security protection operation includes decryption and integrity protection verification.
A data transmission method includes:

The terminal sends a wireless connection re-establishment request message to the network side device;

After receiving the wireless connection re-establishment message sent by the network side device, the terminal performs an operation of reestablishing the wireless connection.
The method of claim 31, wherein the operation of the terminal to perform wireless connection re-establishment comprises at least the operation of the terminal to perform PDCP reconnection.
The method according to claim 32, wherein the operation of the terminal to perform PDCP reconnection comprises at least: performing a PDCP re-establishment procedure of the signaling radio bearer when the PDCP layer of the terminal receives the PDCP re-establishment indication.
The method of claim 33, wherein the reconstruction by the terminal The process includes at least one of the following:

For the data sent by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the PDCP re-establishment process of the terminal includes at least one of the following: retransmitting the data packet that has not been successfully transmitted, and protecting the data packet. Operation; wherein the security protection operation includes encryption and integrity protection;

For the data received by the terminal, when the PDCP layer receives the PDCP re-establishment indication, the terminal performs the PDCP re-establishment process to include at least one of the following: processing the data packet received from the lower layer, and protecting the data packet. Operation; wherein the security protection operation includes decryption and integrity protection verification.