CN109246811B - Data transmission method and device - Google Patents

Data transmission method and device Download PDF

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Publication number
CN109246811B
CN109246811B CN201710330313.7A CN201710330313A CN109246811B CN 109246811 B CN109246811 B CN 109246811B CN 201710330313 A CN201710330313 A CN 201710330313A CN 109246811 B CN109246811 B CN 109246811B
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protocol layer
rrc
uplink data
module
data transmission
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CN109246811A (en
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牛丽
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side

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

Abstract

The invention discloses a data transmission method and a device, comprising the following steps: when the UE has uplink data transmission, the first protocol layer of the UE sends a notice of uplink data arrival to the RRC protocol layer. After the RRC message is triggered by the technical scheme provided by the invention, the UE can carry uplink data while sending the third message, so that the RRC message and the data can be simultaneously sent to the base station.

Description

Data transmission method and device
Technical Field
The present invention relates to, but not limited to, wireless communication technology, and in particular, to a data transmission method and apparatus.
Background
The long term evolution (LTE, long Term Evolution) system mainly consists of three parts, as shown in fig. 1, including a User Equipment (UE), a Core Network (CN), and a base station (eNB, evolved Node B). Wherein, the Mobility management entity (MME, mobility MANAGEMENT ENTITY) in the core network is mainly responsible for signaling transmission, and the service gateway (SGW, serving GateWay) is mainly responsible for data transmission. The interface between the UE and the eNB is Uu interface, and the interface between the eNB and the core network is S1 interface.
Fig. 2 is a schematic diagram of a protocol architecture of a UE, an eNB and an MME in an LTE system, AS shown in fig. 2, for the UE, a radio resource control (RRC, radio Resource Control) protocol layer, a packet data convergence protocol (PDCP, packet Data Convergence Protocol) layer, a radio link control (RLC, radio Link Control) protocol layer, a medium Access control (MAC, medium Access Control) protocol layer and a (PHY, physical Layer) protocol layer belong to an Access Stratum (AS), and a higher layer of the AS layer is a non-Access Stratum (NAS, non Access Stratum).
According to the current protocol, when the UE has data transmission, the UE first enters a connected state and then can transmit the data, and the specific process generally includes:
Firstly, UE acquires available lead sequence codes for random access and time-frequency positions for sending the lead sequences through system information or RRC signaling, then randomly selects the lead sequences and the time-frequency positions for sending the lead sequences in available resources, and sends the lead sequences and the time-frequency positions for sending the lead sequences to eNB; the eNB deduces a radio network temporary identifier (RA-RNTI) of random access possibly adopted by the UE through a time-frequency position adopted by the random access preamble sequence, decodes the preamble sequence by the RA-RNTI, replies a random access response to the UE after the eNB successfully decodes the preamble sequence, and carries information such as uplink authorization and the like in the random access response;
Then, the UE sends a third message, namely an RRC establishment request message, on the uplink authorized resource and carries information such as the identification of the UE; the eNB analyzes the uplink data on the uplink authorized resources, confirms the UE, solves the conflict, and sends an RRC establishment message to the UE;
after the UE is configured successfully, replying an RRC establishment completion message;
finally, the UE enters a connected state and then performs data transmission.
As can be seen from the above procedure, the UE wants to transmit data, and must first enter the connected state. The UE enters the connection state from the idle state, which at least requires the steps described above, and has more signaling and longer delay. Especially for some infrequent small data packets, the above-mentioned process is repeatedly executed, and the consumed signaling is more.
Disclosure of Invention
In order to solve the technical problems, the invention provides a data transmission method and a data transmission device, which can ensure that RRC messages and data can be simultaneously sent to a base station.
In order to achieve the object of the present invention, the present invention provides a data transmission method, including:
when the user equipment UE has uplink data transmission, a first protocol layer of the UE sends a notice of uplink data arrival to a radio resource control RRC protocol layer.
Optionally, the first protocol layer is a non-access stratum NAS;
the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
The NAS informs the RRC protocol layer of restoring the connection establishment and informs that the restoration establishment cause is the calling party.
Optionally, the first protocol layer is a packet data convergence protocol PDCP layer; the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
The PDCP layer informs the RRC protocol layer of the arrival of uplink data.
Optionally, the first protocol layer is an RLC protocol layer; the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
And when the RLC protocol layer has valid data packets, the RLC protocol layer informs the RRC protocol layer that uplink data arrives.
Optionally, the first protocol layer is a MAC protocol layer; the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
When the MAC triggers the Buffer Status Report (BSR), the MAC protocol layer informs the RRC protocol layer that uplink data arrives.
Optionally, the method further comprises: it is pre-agreed that the RLC protocol layer or the MAC protocol layer informs the RRC protocol layer only if the logical channel belonging to the SRB does not trigger a BSR.
Optionally, the method further comprises the following steps: setting a timer;
After the UE sends a random access synchronous code, starting the timer;
and when the timer is overtime, the UE sends a third message carrying the uplink data to the base station.
The invention also provides a data transmission device, which comprises: and the notification module is arranged on the first protocol layer and is used for sending a notification of the arrival of the uplink data when the uplink data transmission exists in the UE.
Optionally, the apparatus further comprises: and the triggering module is arranged at the RRC protocol layer and is used for carrying the uplink data when the third message is sent to the base station.
Optionally, the apparatus further comprises: the timing module is arranged at the triggering module of the RRC protocol layer; wherein,
The timing module is used for starting a timer after the UE sends the random access synchronous code;
And the triggering module is used for sending a third message carrying the uplink data to the base station when the timer is overtime.
Optionally, when the first protocol layer is NAS,
The trigger module is further configured to: informing a NAS when the UE enters an inactive state;
the notification module is specifically configured to: when the UE has uplink data to arrive, notifying the trigger module to resume establishing connection, and notifying that the reason for resuming establishing connection is a calling party;
When the first protocol layer is a PDCP layer,
The notification module is specifically configured to: notifying the RRC protocol layer that uplink data arrives when the uplink data arrives, and notifying the trigger module that the uplink data arrives;
When the first protocol layer is an RLC protocol layer,
The notification module is specifically configured to: when a valid data packet exists, notifying the trigger module that uplink data arrives;
when the first protocol layer is a MAC protocol layer,
The notification module is specifically configured to: and when the BSR is triggered, notifying the trigger module that uplink data arrives.
The invention also provides a data transmission device comprising a processor, a memory and a computer program stored on the memory and operable on the processor: when the UE has uplink data transmission, the first protocol layer of the UE sends a notice of uplink data arrival to the radio resource control RRC protocol layer.
The present invention further provides a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements a data transmission method according to any of the above.
Compared with the prior art, the technical scheme at least comprises the following steps: when the UE has uplink data transmission, the first protocol layer of the UE sends a notice of uplink data arrival to the RRC protocol layer. After the RRC message is triggered by the technical scheme provided by the application, the UE can carry uplink data while sending the third message, so that the RRC message and the data can be simultaneously sent to the base station.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a schematic diagram of a composition architecture of an LTE system in the related art;
Fig. 2 is a schematic diagram of a protocol architecture of a UE, an eNB and an MME in an LTE system;
fig. 3 is a schematic diagram of a related flow in which a UE according to the present invention does not enter a connected state to transmit data;
FIG. 4 is a flow chart of a data transmission method of the present invention;
Fig. 5 is a schematic diagram of the composition structure of the data transmission device of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
Fig. 3 is a schematic diagram of a related flow of transmitting data in an inactive state by a UE according to the present invention, as shown in fig. 3, the UE sends a third message (such as an RRC connection recovery request (RRC Connection Resume Request) message in fig. 3) according to a flow specified by a current protocol) and carries uplink data, that is, the UE may send/receive data without entering a connected state.
The inventor considers through analysis of the related technology of transmitting data by the UE in the inactive state that the RRC message is triggered by a higher layer in the idle state according to the current protocol, and the AS layer cannot receive the data submitted by the higher layer. In the technical scheme of transmitting data in the inactive state by the UE proposed in the related art, the RRC message may be triggered by the AS in the inactive state, and the AS may receive the data submitted by the higher layer. Then, in order to ensure that the RRC message and data can be simultaneously transmitted to the base station, a mechanism for triggering the RRC message shown in fig. 3 needs to be provided.
Fig. 4 is a flowchart of a data transmission method according to the present invention, as shown in fig. 4, at least including:
step 400: when the UE has uplink data transmission, the first protocol layer of the UE sends a notice of uplink data arrival to the RRC protocol layer.
Optionally, the method further comprises: and when the UE sends a third message to the base station, carrying the uplink data.
Optionally, the method further comprises the following steps: setting a timer; after the UE sends the random access synchronous code, starting the timer; and when the timer is overtime, the UE sends a third message carrying uplink data to the base station.
Optionally, the third message includes an RRC connection resume request message.
Alternatively, the first protocol layer may be NAS; in this case, when the UE enters the inactive state, the method further includes: the RRC protocol layer informs the NAS. And when the UE has uplink data arrived, the sending, by the first protocol layer of the UE, a notification of the arrival of the uplink data to the RRC protocol layer includes: the NAS will inform the RRC protocol layer to resume establishing the connection and inform that the reason for resuming the establishment is the caller.
Alternatively, the first protocol layer may be a PDCP layer; when the uplink data arrives at the PDCP layer, the first protocol layer of the UE transmitting a notification of the arrival of the uplink data to the RRC protocol layer includes: the PDCP layer informs the RRC protocol layer of the arrival of uplink data.
Alternatively, the first protocol layer may be an RLC protocol layer; when the RLC protocol layer has a valid data packet, the first protocol layer of the UE sending a notification of uplink data arrival to the RRC protocol layer includes: the RLC protocol layer informs the RRC protocol layer of the arrival of uplink data. Further, the method comprises the steps of,
Before the RLC protocol layer sends a notification to the RRC protocol layer to resume establishment of the connection, the method further includes:
When the UE enters an inactive state, the DRB and the SRB are not suspended; when the uplink data packet arrives, the data packet can be processed by the PDCP protocol layer to arrive at the RLC protocol layer, or the RLC protocol layer has segmented data packets, or the RLC ARQ has retransmission data packets, or the RLC protocol layer has control data packets. Thus, the RLC protocol layer in this step is performed to notify the RRC protocol layer.
Alternatively, the first protocol layer may be a MAC protocol layer; the first protocol layer of the UE sending a notification of the arrival of uplink data to the RRC protocol layer includes: when the MAC triggers a buffer status report (BSR, buffer Status Report), the MAC protocol layer informs the RRC protocol layer of the arrival of uplink data.
When the UE enters the inactive state, DRBs and SRBs are not suspended.
When the logical channel has a valid data packet and triggers the BSR, the MAC protocol layer in this step is executed to notify the RRC protocol layer.
Further, the method further comprises the following steps:
it is pre-agreed that the RLC protocol layer or the MAC protocol layer informs the RRC protocol layer only if the logical channel belonging to the SRB does not trigger the BSR.
In this way, the RRC protocol layer of the UE receives the notification, requests the RLC protocol layer of the UE to restore the RRC connection, and simultaneously transmits uplink data.
Alternatively, where the first protocol layer may be NAS,
When the UE enters an inactive state, the RRC protocol layer performs the reestablishment of PDCP, reestablishes RLC, MAC application default configuration, PHY application default configuration, and data bearers (DRB) and signaling bearers (SRB) are suspended and inform the NAS;
And the RRC protocol layer receives the notification, recovers the DRB and the SRB between the base station and the UE, and submits an RRC connection recovery request (RRC Connection Resume Request) message carrying uplink data to the RLC protocol layer.
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer. For the data packet, the PDCP protocol layer receives the data packet submitted by the higher layer, processes the data packet and submits the data packet to the RLC protocol layer; the RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
If the UE enters the inactive state, DRBs and SRBs are not suspended. Then, the RRC protocol layer only needs to inform the NAS, and omits the above-mentioned performing of re-establishing PDCP, re-establishing RLC, MAC applying default configuration, PHY applying default configuration, and recovering the processing of DRB and SRB between the base station and the UE.
Alternatively, where the first protocol layer may be a PDCP layer,
When the UE enters an inactive state, the DRB and the SRB are suspended, after the RRC protocol layer receives the notification, the PDCP is rebuilt, the RLC is rebuilt, the MAC protocol layer applies default configuration, and the PHY protocol layer applies default configuration to recover the DRB and the SRB; and, the RRC protocol layer submits RRC Connection Resume Request information carrying uplink data to the RLC protocol layer;
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer. For the data packet, the PDCP protocol layer receives the data packet submitted by the higher layer, processes the data packet and submits the data packet to the RLC protocol layer; the RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
If the DRB and SRB are not suspended when the UE enters the inactive state, the RRC protocol layer omits the above-mentioned execution of reestablishing PDCP, reestablishing RLC, applying the default configuration to the MAC, applying the default configuration to the PHY, and recovering the treatment of the DRB and SRB between the base station and the UE. The RRC protocol layer submits RRC Connection Resume Request information carrying uplink data to the RLC protocol layer;
alternatively, where the first protocol layer may be an RLC protocol layer,
After the RRC protocol layer receives the notification, it submits RRC Connection Resume Request information carrying uplink data to the RLC protocol layer.
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer.
In order to avoid the RRC protocol layer submitting the RRC message to trigger the RLC protocol layer to notify the RRC protocol layer, triggering the RRC protocol layer to send the RRC message again, the method further comprises the following steps: the RLC protocol layer is pre-agreed that only when the SRB has no valid data packet, the RLC protocol layer will notify the RRC protocol layer.
Alternatively, where the first protocol layer may be a MAC protocol layer,
After the RRC protocol layer receives the notification, it submits RRC Connection Resume Request information carrying uplink data to the RLC protocol layer.
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer.
Also, for the RRC protocol layer to submit the RRC message, triggering the RLC protocol layer to notify the RRC protocol layer, triggering the RRC protocol layer to send the RRC message again, further including: it is pre-agreed that the MAC protocol layer will inform the RRC protocol layer only if the logical channel belonging to the SRB does not trigger the BSR.
After the mechanism of triggering the RRC message shown in fig. 3 in the invention, the UE can carry uplink data while sending the third message, thus ensuring that the RRC message and the data can be sent to the base station at the same time.
Whether the data packet or RRC Connection Resume Request message arrives at the MAC protocol layer first, the MAC protocol layer is considered to have valid data, which triggers the BSR procedure. Since there is no uplink grant, the SR procedure is then triggered. Also, since there is no uplink resource available, a random access procedure is triggered.
If the time interval between the transmission of the random access synchronization code and the transmission of the third message in the random access procedure is long enough, either the packet or RRC Connection Resume Request message may arrive at the MAC before the random access response is received. Thus, it is ensured that the RRC message and the data are simultaneously transmitted to the base station in the random access procedure.
Alternatively, the process may be carried out in a single-stage,
In order to ensure that RRC messages and data can be sent to the base station at the same time, that is, in order to better ensure that the time between sending the random access synchronization code and sending the third message is long enough, the method of the present invention further comprises:
A timer is set, and the timer is started after the UE transmits the random access synchronization code. And only when the timer expires, the UE can transmit the third message, RRC Connection Resume Request messages.
The timer may be configured to the UE by a system information broadcast, or an RRC message. The RRC message may be an RRC connection reconfiguration (RRC Connection Reconfiguration) message, an RRC connection release (RRC Connection Release) message, or the like.
In this way, it is better ensured that the MAC protocol layer can multiplex RRC messages and data packets onto one MAC PDU when sending the third message.
The present invention also provides a computer-readable storage medium storing computer-executable instructions for performing the data transmission method of any one of the present invention.
The data transmission method of the present invention will be described in detail with reference to specific embodiments.
In the first embodiment, when the UE enters the inactive state, the RRC protocol layer of the UE informs the NAS.
When the uplink data arrives at the UE, the NAS of the UE informs the RRC protocol layer to resume the establishment of the connection and informs that the establishment reason is the calling party; the RRC connection resume request (RRC Connection Resume Request) procedure is triggered upon receipt of the notification at the RRC protocol layer. That is, when the UE enters the inactive state, the RRC performs PDCP re-establishment, RLC re-establishment, MAC protocol layer application default configuration, PHY application default configuration, DRB and SRB are suspended, and NAS is informed.
When the UE is in an inactive state and uplink data arrives at the UE, the NAS may notify RRC and carry that the resume establishment cause is the caller. The RRC protocol layer receives the notification, recovers the DRBs and SRBs between the base station and the UE, and submits RRC Connection Resume Request a message to the RLC protocol layer.
The RLC protocol layer processes the data packets and submits them to the MAC protocol layer. And for the data packets, the PDCP layer receives the data packets submitted by the higher layer, processes the data packets and submits the data packets to the RLC protocol layer. The RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
Whether the data packet or RRC Connection Resume Request message arrives at the MAC protocol layer first, the MAC protocol layer is considered to have valid data, which triggers the BSR procedure. Since there is no uplink grant, the SR procedure is then triggered. Also, since there is no uplink resource available, a random access procedure is triggered.
If the time interval between the transmission of the random access synchronization code and the transmission of the third message in the random access procedure is long enough, either the packet or RRC Connection Resume Request message may arrive at the MAC before the random access response is received. Thus, it is ensured that the RRC message and the data are simultaneously transmitted to the base station in the random access procedure.
In a second embodiment, the RRC protocol layer informs the NAS when the UE enters an inactive state.
When the UE has uplink data arrived, the NAS may notify the RRC protocol layer to resume connection establishment, and notify that the reason for resuming connection establishment is the caller. The RRC protocol layer receives the notification and triggers RRC Connection Resume Request the procedure. In this embodiment, when the UE enters the inactive state, the DRB and the SRB are not suspended, and the RRC protocol layer informs the NAS.
When the UE is in an inactive state and the data packet arrives, the NAS may notify the RRC protocol layer to resume connection establishment and carry that the reason for resuming connection establishment is the caller. The RRC protocol layer receives the notification and submits RRC Connection Resume Request a message to the RLC protocol layer.
The RLC protocol layer processes the data packets and submits them to the MAC protocol layer. And for the data packets, the PDCP layer receives the data packets submitted by the higher layer, processes the data packets and submits the data packets to the RLC protocol layer. The RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
In a third embodiment, when the UE has uplink data to reach the PDCP layer, the PDCP layer informs the RRC protocol layer to trigger RRC Connection Resume Request the RRC protocol layer procedure. In this embodiment, when the UE enters the inactive state, DRBs and SRBs are suspended.
When the UE is in an inactive state and the PDCP receives a data packet submitted by a higher layer, the PDCP informs the RRC protocol layer to resume the connection establishment. After the RRC protocol layer receives the notification, the PDCP is rebuilt, the RLC is rebuilt, the MAC applies the default configuration, the PHY applies the default configuration, the DRB and the SRB are restored, and RRC Connection Resume Request information is submitted to the RLC protocol layer.
The RLC protocol layer processes the data packets and submits them to the MAC protocol layer. And for the data packets, the PDCP layer receives the data packets submitted by the higher layer, processes the data packets and submits the data packets to the RLC protocol layer. The RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
In the fourth embodiment, when the UE has uplink data to reach the PDCP layer, the PDCP layer informs the RRC protocol layer to resume connection establishment, so that the RRC protocol layer triggers RRC Connection Resume Request procedures. In this embodiment, when the UE enters the inactive state, the DRB and the SRB are not suspended.
When the UE is in an inactive state and the PDCP layer receives a data packet submitted by a higher layer, the PDCP layer informs the RRC protocol layer to resume connection establishment. After the RRC protocol layer receives the notification, it submits RRC Connection Resume Request a message to the RLC protocol layer.
The RLC protocol layer processes the data packets and submits them to the MAC protocol layer. And for the data packets, the PDCP layer receives the data packets submitted by the higher layer, processes the data packets and submits the data packets to the RLC protocol layer. The RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
In the fifth embodiment, when the RLC protocol layer has valid data packets, the RLC protocol layer notifies the RRC protocol layer to resume connection establishment, so that the RRC protocol layer triggers RRC Connection Resume Request procedures. In this embodiment, when the UE enters the inactive state, the DRB and the SRB are not suspended.
When the UE is in an inactive state and an uplink data packet arrives, the data packet is processed by the PDCP layer and arrives at the RLC protocol layer, or when the RLC protocol layer has a segmented data packet, or when the RLC ARQ has a retransmission data packet, or when the RLC protocol layer has a control data packet, the RLC protocol layer can inform the RRC protocol layer to resume establishing connection. After the RRC protocol layer receives the notification, it submits RRC Connection Resume Request a message to the RLC protocol layer. The RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
In order to avoid the RRC protocol layer submitting the RRC message to trigger the RLC protocol layer to notify the RRC protocol layer, triggering the RRC protocol layer to send the RRC message again, the method further comprises the following steps: the RLC protocol layer is pre-agreed that only when the SRB has no valid data packet, the RLC protocol layer will notify the RRC protocol layer.
In the sixth embodiment, when the MAC protocol layer triggers the BSR, the MAC protocol layer notifies the RRC protocol layer to resume the connection establishment, so that the RRC protocol layer triggers RRC Connection Resume Request procedures. In this embodiment, when the UE enters the inactive state, the DRB and the SRB are not suspended.
When the UE is in an inactive state, the logical channel has a valid packet, and when the BSR is triggered, the MAC protocol layer notifies the RRC protocol layer to resume connection establishment. After the RRC protocol layer receives the notification, it submits RRC Connection Resume Request a message to the RLC protocol layer. The RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
Also, to avoid the RRC protocol layer submitting an RRC message to trigger the RLC protocol layer to notify the RRC protocol layer, triggering the RRC protocol layer to send an RRC message again, the method further includes: the RLC protocol layer is pre-agreed that only when the SRB has no valid data packet, the RLC protocol layer will notify the RRC protocol layer.
Fig. 5 is a schematic structural diagram of a data transmission device of the present invention, which is intended to be disposed in a UE, as shown in fig. 5, and at least includes: the notification module is arranged on the first protocol layer, and the triggering module is arranged on the RRC protocol layer; wherein,
And the notification module is used for sending a notification of the arrival of the uplink data to the trigger module when the uplink data transmission exists in the UE.
The apparatus further comprises: and the triggering module is arranged at the RRC protocol layer and is used for carrying the uplink data when the third message is sent to the base station.
Alternatively, where the first protocol layer is NAS,
The trigger module is also used for: the UE informs the NAS when entering the inactive state.
The notification module is specifically used for: and when the uplink data arrives at the UE, notifying the trigger module to resume the establishment of the connection, and notifying that the establishment reason is the calling party.
Alternatively, when the first protocol layer is a PDCP layer,
The notification module is specifically used for: and when the uplink data arrives, notifying the trigger module that the uplink data arrives.
Alternatively, where the first protocol layer is an RLC protocol layer,
The notification module is specifically used for: and when the valid data packet exists, notifying the trigger module that the uplink data arrives. Further, the method comprises the steps of,
The notification module is further configured to, before the RLC protocol layer sends a notification to the RRC protocol layer to resume establishment of a connection, when the UE enters an inactive state, the DRB and the SRB are not suspended; when the uplink data packet arrives, the data packet arrives at the RLC protocol layer through the processing of the PDCP protocol layer, or the RLC protocol layer has segmented data packets, or the RLC ARQ has retransmission data packets, or the RLC protocol layer has control data packets.
Alternatively, where the first protocol layer is a MAC protocol layer,
The notification module is specifically used for: when the BSR is triggered, the trigger module is notified that uplink data arrives. Further, the method comprises the steps of,
The notification module is further configured to, before the RLC protocol layer sends a notification to the RRC protocol layer to resume establishment of a connection, when the UE enters an inactive state, the DRB and the SRB are not suspended; when the logic channel has valid data packets, the BSR is triggered.
Alternatively, where the first protocol layer is NAS,
The triggering module is specifically used for: when the UE enters an inactive state, performing reestablishment of PDCP, reestablishment of RLC, MAC application default configuration, PHY application default configuration, DRB and SRB are suspended, and informing NAS; and receiving the notification from the notification module, recovering the DRB and the SRB between the base station and the UE, and submitting RRC Connection Resume Request information carrying uplink data to the RLC protocol layer.
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer. For the data packet, the PDCP protocol layer receives the data packet submitted by the higher layer, processes the data packet and submits the data packet to the RLC protocol layer; the RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
If the DRB and SRB are not suspended when the UE enters the inactive state, the triggering module is specifically configured to: only the NAS needs to be informed; and receiving the notification from the notification module, recovering the DRB and the SRB between the base station and the UE, and submitting RRC Connection Resume Request information carrying uplink data to the RLC protocol layer.
Alternatively, where the first protocol layer may be a PDCP layer,
The triggering module is specifically used for: when the UE enters an inactive state, the DRB and the SRB are suspended; receiving the notice from the notice module, reconstructing PDCP, reconstructing RLC, applying default configuration by the MAC protocol layer, applying default configuration by the PHY protocol layer, and recovering DRB and SRB; and submitting RRC Connection Resume Request message carrying uplink data to the RLC protocol layer;
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer. For the data packet, the PDCP protocol layer receives the data packet submitted by the higher layer, processes the data packet and submits the data packet to the RLC protocol layer; the RLC protocol layer processes the data packets and submits them to the MAC protocol layer.
If the DRB and SRB are not suspended when the UE enters the inactive state, the triggering module is specifically configured to: and receiving the notification from the notification module, and submitting RRC Connection Resume Request information carrying uplink data to the RLC protocol layer.
Alternatively, where the first protocol layer may be an RLC protocol layer,
The triggering module is specifically used for: and receiving the notification from the notification module, and submitting RRC Connection Resume Request information carrying uplink data to the RLC protocol layer.
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer.
In order to avoid the RRC protocol layer submitting the RRC message to trigger the RLC protocol layer to notify the RRC protocol layer, the RRC protocol layer is triggered again to send the RRC message, and the triggering module is further used for: the RLC protocol layer is pre-agreed that only when the SRB has no valid data packet, the RLC protocol layer will notify the RRC protocol layer.
Alternatively, where the first protocol layer may be a MAC protocol layer,
The triggering module is specifically used for: and receiving the notification from the notification module, and submitting RRC Connection Resume Request information carrying uplink data to the RLC protocol layer.
Thus, the RLC protocol layer processes the data packet and submits it to the MAC protocol layer.
Likewise, in order for the RRC protocol layer to submit an RRC message to trigger the RLC protocol layer to notify the RRC protocol layer, the RRC protocol layer is triggered again to send the RRC message, and the triggering module is further configured to: it is pre-agreed that the MAC protocol layer will inform the RRC protocol layer only if the logical channel belonging to the SRB does not trigger the BSR.
The invention also provides a data transmission device comprising a processor, a memory and a computer program stored on the memory and executable on the processor: when the UE has uplink data transmission, the first protocol layer of the UE sends a notice of uplink data arrival to the radio resource control RRC protocol layer.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A data transmission method, comprising:
When User Equipment (UE) has uplink data transmission, a first protocol layer of the UE sends a notice of uplink data arrival to a Radio Resource Control (RRC) protocol layer;
the method also comprises the following steps: setting a timer;
After the UE sends a random access synchronous code, starting the timer;
and when the timer is overtime, the UE sends a third message carrying the uplink data to the base station.
2. The data transmission method according to claim 1, wherein the first protocol layer is a non-access stratum NAS;
the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
The NAS informs the RRC protocol layer of restoring the connection establishment and informs that the restoration establishment cause is the calling party.
3. The data transmission method according to claim 1, wherein the first protocol layer is a packet data convergence protocol PDCP layer; the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
The PDCP layer informs the RRC protocol layer of the arrival of uplink data.
4. The data transmission method according to claim 1, wherein the first protocol layer is an RLC protocol layer; the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
And when the RLC protocol layer has valid data packets, the RLC protocol layer informs the RRC protocol layer that uplink data arrives.
5. The data transmission method according to claim 1, wherein the first protocol layer is a MAC protocol layer; the first protocol layer of the UE sending a notification of uplink data arrival to an RRC protocol layer includes:
When the MAC triggers the Buffer Status Report (BSR), the MAC protocol layer informs the RRC protocol layer that uplink data arrives.
6. The data transmission method according to claim 4, wherein the method further comprises: it is pre-agreed that the RLC protocol layer informs the RRC protocol layer only if the logical channel belonging to the SRB does not trigger a BSR.
7. The data transmission method according to claim 5, characterized in that the method further comprises: it is pre-agreed that the MAC protocol layer informs the RRC protocol layer only if the logical channel belonging to the SRB does not trigger a BSR.
8. A data transmission apparatus, comprising: the notification module is arranged on the first protocol layer and is used for sending a notification of the arrival of uplink data when the UE has the uplink data transmission;
The apparatus further comprises: the timing module is arranged at the triggering module of the RRC protocol layer; wherein,
The timing module is used for starting a timer after the UE sends the random access synchronous code;
And the triggering module is used for sending a third message carrying the uplink data to the base station when the timer is overtime.
9. The data transmission apparatus according to claim 8, wherein the apparatus further comprises: and the triggering module is arranged at the RRC protocol layer and is used for carrying the uplink data when the third message is sent to the base station.
10. The data transmission device of claim 8, wherein,
When the first protocol layer is NAS,
The trigger module is further configured to: informing a NAS when the UE enters an inactive state;
the notification module is specifically configured to: when the UE has uplink data to arrive, notifying the trigger module to resume establishing connection, and notifying that the reason for resuming establishing connection is a calling party;
When the first protocol layer is a PDCP layer,
The notification module is specifically configured to: notifying the RRC protocol layer that uplink data arrives when the uplink data arrives, and notifying the trigger module that the uplink data arrives;
When the first protocol layer is an RLC protocol layer,
The notification module is specifically configured to: when a valid data packet exists, notifying the trigger module that uplink data arrives;
when the first protocol layer is a MAC protocol layer,
The notification module is specifically configured to: and when the BSR is triggered, notifying the trigger module that uplink data arrives.
11. A data transmission apparatus comprising a processor, a memory and a computer program stored on the memory and executable on the processor: when the UE has uplink data transmission, a first protocol layer of the UE sends a notice of uplink data arrival to a Radio Resource Control (RRC) protocol layer;
The apparatus further comprises: the timing module is arranged at the triggering module of the RRC protocol layer; wherein,
The timing module is used for starting a timer after the UE sends the random access synchronous code;
And the triggering module is used for sending a third message carrying the uplink data to the base station when the timer is overtime.
12. A computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the data transmission method of any of claims 1 to 7.
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