WO2010048848A1

WO2010048848A1 - Data processing method and system

Info

Publication number: WO2010048848A1
Application number: PCT/CN2009/074256
Authority: WO
Inventors: 高闻
Original assignee: 华为技术有限公司
Priority date: 2008-10-31
Filing date: 2009-09-27
Publication date: 2010-05-06
Also published as: CN101730137B; CN101730137A

Abstract

A data processing method is provided, which comprises the following steps. Upon receipt of a message indicating that there is new downlink data arriving, UE starts a Round-Trip Time (RTT) timer of a receiving end. After the RTT timer of the receiving end expires, UE starts a retransmission timer of the receiving end. After the retransmission timer of the receiving end expires, if the downlink data is not successfully decoded, UE starts the RTT timer of the receiving end. A data processing system is also provided.

Description

Data processing method and system The application is submitted to the Chinese Patent Office on October 31, 2008, and the application number is

200810217500, 5, the priority of the Chinese patent application entitled "Data Processing Method and System", the entire contents of which are hereby incorporated by reference. Technical field

The present invention relates to the field of mobile communications, and in particular to a data processing method and system in a communication system. Background technique

In the Long Term Evolution (LTE) system, the user equipment (UE) can use the discontinuous reception (DRX) mechanism to save power. According to the DRX mechanism, the UE does not receive data for a preset period of time, for example, the receiver is turned off to be in a sleep state, and the UE "wakes up" after the preset period to monitor whether there is data reception or transmission, if not, the UE Continue to sleep. Therefore, the DRX cycle of the UE in the connected state (RRC-CONNECTED) can be divided into an on duration and a sleep (sleep).

If the UE receives a Physical Downlink Control Channel (PDCCH) message for instructing the base station to send downlink data during the active period, the UE starts a Receiver Round Trip Time Timer (HARQ RTT Timer). During the operation of the Round-Trip Time (RTT) timer, the UE is in a sleep state. When the UE receives the downlink data successfully, the UE stops the RTT timer of the receiving end, and sends an acknowledgement message ACK to the base station; when the UE fails to receive the downlink data, the RTT timer of the receiving end continues to time until the timeout; the UE starts the receiving end. Retransmission Timer (DRX Retransmission Timer). During the operation of the receiver retransmission timer, the UE is in an active state, and the search and reception are used to indicate that the downlink data is heavy. The transmitted PDCCH message. After receiving the PDCCH message indicating the arrival of the downlink retransmission data, the UE stops the receiving end retransmission timer, and starts the receiving end RTT timer.

After the base station sends a PDCCH message indicating that the downlink data is sent, the RTT timer is started. If the base station does not receive the acknowledgment message of the UE during the operation of the RTT timer, the base station starts the retransmission timer of the sender after the RTT timer expires, and during the retransmission timer of the transmitting end. Sending retransmission data to the UE, and a PDCCH message indicating that the downlink retransmission data arrives. After the base station sends the PDCCH message indicating the arrival of the downlink retransmission data, the base station starts the RTT timer. After the PDCCH message indicating the arrival of the downlink retransmission data, the terminal is considered to enter a sleep state after receiving the PDCCH message. If the PDCCH message is lost, the UE retransmission timer is still running, and the receiving end RTT timer is not started, that is, the UE is in an active state and does not enter a sleep state. Thus, the DRX status on both sides of the base station and the terminal is out of synchronization. The base station may send a PDCCH message to the UE in the sleep state, causing the UE to miss the PDCCH message sent by the base station, thereby missing the downlink reception or the uplink transmission, resulting in a decrease in transmission performance. Summary of the invention

The data processing method and system provided by the embodiments of the present invention can solve the technical problem that the transmission performance is reduced due to the loss of the PDCCH message for indicating the arrival of the downlink retransmission data.

An embodiment of the present invention provides a data processing method, where the method includes:

The user equipment UE starts the RTT timer of the receiving end when receiving the message indicating the arrival of the new downlink data;

After the receiving end RTT timer expires, the UE starts the receiving end retransmission timer; after the receiving end retransmission timer expires, the UE starts the receiving end RTT timer if the downlink data decoding fails.

The embodiment of the invention further provides a data processing method, the method comprising: When receiving the message indicating the arrival of the new downlink data, the user equipment UE starts the RTT timer of the receiving end, and starts the retransmission timer of the receiving end after the RTT timer of the receiving end times out; the UE is heavy at the receiving end After the timer expires, the monitoring timer is started, and after the downlink data is successfully decoded, the monitoring timer is stopped.

The duration of the monitoring timer is the sum of the duration of the retransmission timer at the receiving end and the duration of the RTT timer at the receiving end.

The embodiment of the invention further provides a data processing system, the system comprising:

The user equipment UE is configured to: when receiving the message indicating the arrival of the new downlink data, start the RTT timer of the receiving end; after the RTT timer expires at the receiving end, start the retransmission timer of the receiving end; and retransmit the timing at the receiving end After the device times out, if the downlink data decoding fails, the receiving end RTT timer is started; and,

a base station, configured to start a sending end RTT timer when the new downlink data is sent; start a sending end retransmission timer after the sending end RTT timer expires; and start a sending end RTT after the transmitting end retransmission timer expires Timer.

The user equipment UE is configured to: when receiving the message for indicating the arrival of the new downlink data, start the RTT timer of the receiving end, and start the retransmission timer of the receiving end after the RTT timer expires at the receiving end; and at the receiving end After the retransmission timer expires, the monitoring timer is started, and after the downlink data is successfully decoded, the monitoring timer is stopped.

The base station is configured to: when the new downlink data is sent, start the RTT timer of the sending end, start the sending end retransmission timer after the RTT timer expires at the sending end; and stop sending after transmitting the retransmitted data of the downlink data. The terminal retransmits the timer and starts the RTT timer at the transmitting end.

In this embodiment, by setting start and stop conditions for each timer or setting a monitoring timer for the UE, the problem of data transmission failure caused by PDCCH message loss can be solved, thereby improving transmission performance. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

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

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

3 is a flowchart of a data processing method according to Embodiment 3 of the present invention;

4 is a flowchart of a data processing method according to Embodiment 4 of the present invention;

FIG. 5 is a structural diagram of a data processing system according to Embodiment 5 of the present invention; FIG.

FIG. 6 is a structural diagram of a data processing system according to Embodiment 6 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIG. 1 , a flow chart of a data processing method according to Embodiment 1 of the present invention is provided. The method includes the following steps:

S101. The UE starts a receiving end RTT timer when receiving a PDCCH message indicating that new downlink data arrives.

Correspondingly, the base station starts the RTT timer of the sending end when transmitting the new downlink data. It should be noted that, if the retransmission timer of the transmitting end of the base station is running, the base station stops the retransmission timer of the transmitting end;

The duration of the RTT timer at the receiving end is equal to the duration of the RTT timer of the transmitting end of the base station. After receiving the RTT timer of the receiving end, the UE starts the retransmission timer of the receiving end. Correspondingly, the base station starts the retransmission timer of the transmitting end after the RTT timer expires at the transmitting end. The duration is the same as the duration of the retransmission timer of the transmitting end of the base station. It should be noted that, in this step, the UE starts the retransmission timer of the receiving end after the RTT timer expires on the receiving end, which means that the UE times out the RTT timer of the receiving end. The triggering condition of the receiving end retransmission timer is started; if the UE does not receive the downlink data sent by the base station with the PDCCH message or fails to decode the downlink data, the RTT timer of the receiving end of the UE is timed out.

After the receiving end retransmission timer expires, the UE starts the RTT timer of the receiving end if the downlink data decoding fails.

Correspondingly, the base station starts the RTT timer of the sending end after the retransmission timer of the transmitting end times out. In this embodiment, the UE will cyclically execute S102 and S103 until the UE downlink data is successfully decoded. If the UE receives the next PDCCH message indicating the arrival of the new downlink data before the downlink data is successfully decoded, the UE jumps to S101.

In this embodiment, by setting start and stop conditions for each timer, the problem of data transmission failure caused by PDCCH message loss can be solved, thereby improving transmission performance.

FIG. 2 is a schematic flowchart diagram of a data processing method according to Embodiment 2 of the present invention, where the method includes the following steps:

5201. When receiving the PDCCH message for indicating the arrival of the new downlink data, the UE starts the RTT timer of the receiving end. After the RTT timer expires, the UE starts the retransmission timer of the receiving end. Correspondingly, the foregoing base station is transmitting. In the above downlink data, the RTT timer of the sending end is started, and the transmitting end retransmission timer is started after the RTT timer of the transmitting end times out.

The duration of the RTT timer of the receiving end is equal to the duration of the RTT timer of the transmitting end of the base station.

After the receiving end retransmission timer expires, the UE starts the monitoring timer. The duration of the monitoring timer is the sum of the duration of the retransmission timer of the receiving end and the duration of the RTT timer of the receiving end.

Correspondingly, after transmitting the retransmission data of the downlink data, the base station stops the retransmission timing of the transmitting end. , and start the sender RTT timer.

S203. After successfully decoding the downlink data, the UE stops the monitoring timer.

In this embodiment, by increasing the monitoring timer of the UE, the UE is in an active state when the base station sends the next PDCCH message, thereby solving the problem of data transmission failure caused by the loss of the PDCCH message, and improving the transmission performance.

FIG. 3 is a flowchart of a data processing method according to Embodiment 3 of the present invention. As shown in FIG. 3, in the third embodiment of the present invention, the network side has downlink data waiting to be sent to the UE. The data processing process of this embodiment includes the following steps:

S301. The base station sends a PDCCH message and downlink data, and starts a sending end RTT timer. The UE receives the PDCCH message and the downlink data, and starts the receiving end RTT timer.

The PDCCH message is used to indicate that the base station sends new downlink data, that is, non-retransmission data. For example, the PDCCH message and the downlink data sent by the base station in the same subframe, the UE can know that the new downlink data is received according to the PDCCH message, instead of the retransmission data of the downlink data.

Specifically, the base station sends the PDCCH message and the downlink data to the UE in the active state at time T31, and the UE receives the PDCCH message and the downlink data at time T31, so that the RTT timers of the base station and the UE are started at the same time.

5302. The UE fails to decode the received downlink data, and sends a non-acknowledgement message NACK to the base station. The base station receives the NACK, and starts the sender retransmission timer after the RTT timer expires.

Specifically, the UE sends a NACK at a certain moment, which is assumed to be time T32; the base station receives the NACK at time T32, and waits for the RTT timer of the transmitting end to time out. Assuming that the RTT timer of the transmitting end times out at time T33, the base station starts the transmitting end retransmission timer at time T33.

In this embodiment, the RTT timer of the receiving end and the RTT timer of the sending end are preset to be the same duration, and the RTT timer of the receiving end also times out at time T33, and the UE starts the retransmission timer of the receiving end, thereby The retransmission timer of the base station and the UE is started at the same time.

S303. The base station sends, to the UE, a PDCCH message and downlink data indicating that the retransmission data arrives. Retransmit the data.

The PDCCH message is used to indicate that the base station sends the retransmission data of the downlink data. For example, the PDCCH message and the downlink data sent by the base station in the same subframe, the UE can know the retransmission data of the received downlink data according to the PDCCH message, instead of the new downlink data.

Specifically, at a certain time during the operation of the retransmission timer of the transmitting end, for example, at time T33, the base station sends retransmission data of the PDCCH message and the downlink data for indicating the arrival of the downlink retransmission data to the UE.

In this embodiment, if the PDCCH message is lost, the UE does not receive the PDCCH message, and thus cannot know that data will arrive, so the retransmission data is not received.

S304: After the retransmission timer of the transmitting end of the base station times out, the base station starts the RTT timer of the sending end. Among them, 4 sets the receiver retransmission timer to time out at time T34.

Specifically, the base station does not receive feedback (ACK or NACK) of the UE within a preset time period after the time T33 (for example, between time T33 and time T34), and the base station starts at time T34 when the transmitting end retransmission timer expires. Transmitter RTT timer.

In this embodiment, the receiving end retransmission timer and the sending end retransmission timer are preset to be the same duration, and the receiving end retransmission timer also times out at time T34, and the UE starts the receiving end RTT timer. Thereby, the base station and the UE's RTT timer are started at the same time.

S305. The base station sends the PDCCH message and the retransmission data of the downlink data to the UE.

Specifically, the base station starts the sender retransmission timer after the RTT timer expires, and sends the PDCCH message indicating the downlink retransmission data and the retransmission data of the downlink data to the UE during the retransmission timer operation of the UE.

5306. The UE receives the PDCCH message and retransmits the data, and sends a confirmation message ACK: to the base station after the decoding succeeds.

In this embodiment, by setting the duration of the RTT timer and the retransmission timer of the transmitting end to be equal to the corresponding timer duration of the receiving end, and setting the start and stop conditions for each timer, the network side and the user side discontinuity can be maintained. Receive timing synchronization, which is used to indicate the arrival of downlink retransmission data. The problem of data transmission failure caused by the loss of the PDCCH message, thereby improving the transmission performance.

4 is a flowchart of a data processing method according to Embodiment 4 of the present invention. As shown in FIG. 4, in Embodiment 4 of the present invention, a UE sets a monitoring timer (PDCCH Lost Timer). The process of this embodiment is as follows:

S401-402, similar to S301-302, will not be described again.

S403. The base station sends the retransmission data of the PDCCH message and the downlink data to the UE, stops the retransmission timer of the sending end, and starts the RTT timer of the sending end. After the UE retransmits the timer expires, the UE starts the monitoring timer.

The PDCCH message is used to indicate that the downlink retransmission data arrives.

Specifically, in this step, the base station does not need to wait for the retransmission timer of the transmitting end to time out, but is transmitting

After the retransmission of the PDCCH message and the downlink data, the retransmission timer is stopped. If the UE does not receive the PDCCH message and retransmits the data, the UE starts the monitoring timer after the retransmission timer expires.

In this step, the duration of the monitoring timer is set to be the sum of the duration of the retransmission timer of the receiving end and the duration of the RTT timer of the receiving end.

After the RTT timer expires, the base station starts the retransmission timer of the transmitting end. After transmitting the PDCCH message and the downlink retransmission data to the UE, the retransmission timer of the transmitting end is stopped, and the RTT timer of the transmitting end is started.

The base station does not receive the feedback of the UE within the preset time period, and the base station starts the retransmission timer of the sending end after the RTT timer expires at the sending end; the base station sends the retransmission timer during the running of the transmitting end, The PDCCH message indicating the arrival of the downlink retransmission data and the retransmission data of the downlink data.

S405: The UE is in an active state during the running of the monitoring timer, receives the PDCCH message and retransmits the data, and stops the monitoring timer after the decoding succeeds, and sends an acknowledgement message to the base station; after receiving the acknowledgement message, the base station stops the sending end. RTT timer.

In this embodiment, the UE starts monitoring timing when the PDCCH message indicating retransmission is not received. The UE is in an active state when the base station sends the next PDCCH message, and the UE avoids the PDCCH message and the retransmission data because the UE is in a sleep state when the base station sends the PDCCH message, thereby solving the data transmission failure caused by the PDCCH message loss. Problem, improve transmission performance. It is also applicable to other communication systems with discontinuous reception mode.

FIG. 5 is a structural diagram of a data processing system according to Embodiment 5 of the present invention. As shown in FIG. 5, a data processing system 50 according to Embodiment 5 of the present invention includes a user equipment UE51 and a base station 52, where:

The UE 51 is configured to: when receiving the message indicating the arrival of the new downlink data, start the RTT timer 511 of the receiving end; after the RTT timer 511 of the receiving end times out, start the retransmission timer 512 of the receiving end; After the timer 512 expires, if the downlink data decoding fails, the receiving end RTT timer 511 is started; and,

The base station 52 is configured to start the sending end RTT timer 521 when the new downlink data is sent, start the sending end retransmission timer 522 after the sending end RTT timer 521 times out, and retransmit the timer 522 at the transmitting end. The sender RTT timer 521 is started after the timeout.

In this embodiment, the duration of the RTT timer 511 of the receiving end is equal to the duration of the RTT timer 521 of the transmitting end of the base station 52, and the duration of the retransmission timer 512 of the receiving end is equal to the duration of the retransmission timer 522 of the transmitting end of the base station.

The system provided in this embodiment can solve the problem of data transmission failure caused by PDCCH message loss, thereby improving transmission performance.

FIG. 6 is a structural diagram of a data processing system according to Embodiment 6 of the present invention. As shown in FIG. 6, the data processing system 60 provided in Embodiment 6 of the present invention includes a user equipment UE61 and a base station 62, where: the UE61 is used for Upon receiving the message indicating the arrival of the new downlink data, the receiving end RTT timer 611 is started, and after the receiving end RTT timer 611 times out, the receiving end retransmission timer 612 is started; and the retransmission timing is performed at the receiving end. After the timer 612 expires, the monitoring timer 613 is started, and after the downlink data is successfully decoded, the monitoring timer 613 is stopped; wherein, when the timer 613 is monitored The length of the receiving end retransmission timer 612 is the sum of the duration of the RTT timer 611. The base station 62 is configured to start the sending end RTT timer 621 when transmitting the new downlink data. After the RTT timer 621 times out, the sender retransmission timer 622 is started; and after the retransmission data of the downlink data is transmitted, the sender retransmission timer 622 is stopped, and the sender RTT timer 621 is started.

In this embodiment, the duration of the RTT timer 611 of the receiving end is equal to the duration of the RTT timer 621 of the transmitting end of the base station 62, and the duration of the retransmission timer 612 of the receiving end is equal to the duration of the retransmission timer 622 of the transmitting end of the base station.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings should also be considered as The scope of protection of the present invention.

Claims

Rights request

A data processing method, characterized in that the method comprises:

The user equipment UE starts the receiving end return time RTT timer when receiving the message indicating the arrival of the new downlink data;

2. The method according to claim 1, wherein the method further comprises:

The base station starts the RTT timer of the sending end when transmitting the new downlink data;

The base station starts a sender retransmission timer after the RTT timer expires on the sending end;

The base station starts the RTT timer of the sending end after the retransmission timer of the transmitting end times out.

3. The method according to claim 2, wherein the method further comprises:

The duration of the RTT timer of the receiving end is equal to the duration of the RTT timer of the transmitting end of the base station; and the duration of the retransmission timer of the receiving end is equal to the duration of the retransmission timer of the transmitting end of the base station.

The method according to any one of claims 1 to 3, further comprising: when the UE receives the next message indicating the new downlink data before the decoding of the downlink data is successful The UE starts a receiving end RTT timer.

5. A data processing method, the method comprising:

When receiving the message indicating the arrival of the new downlink data, the user equipment UE starts the RTT timer of the receiving end, and starts the retransmission timer of the receiving end after the RTT timer of the receiving end times out; the UE is heavy at the receiving end After the timer expires, the monitoring timer is started, and after the downlink data is successfully decoded, the monitoring timer is stopped.

6. The method according to claim 5, wherein the method further comprises:

The duration of the RTT timer at the receiving end is equal to the duration of the RTT timer of the transmitting end of the base station; The duration of the retransmission timer at the receiving end is equal to the duration of the retransmission timer of the transmitting end of the base station.

The method according to claim 5 or 6, wherein the method further comprises: when the base station sends the new downlink data, starting a RTT timer at the transmitting end, where the transmitting end is

After the RTT timer expires, the sender retransmission timer is started.

After transmitting the retransmission data of the downlink data, the base station stops the retransmission timer of the transmitting end, and starts the RTT timer of the transmitting end.

8. A data processing system, characterized in that the system comprises:

9. A data processing system, characterized in that the system comprises:

The system according to claim 9, wherein the duration of the monitoring timer is the sum of the duration of the retransmission timer of the receiving end and the duration of the RTT timer of the receiving end.